WO2019001537A1

WO2019001537A1 - Heating control method and system for power battery, and storage medium

Info

Publication number: WO2019001537A1
Application number: PCT/CN2018/093449
Authority: WO
Inventors: 梁枫; 李兴华; 杨重科
Original assignee: 北京新能源汽车股份有限公司
Priority date: 2017-06-30
Filing date: 2018-06-28
Publication date: 2019-01-03
Also published as: CN107317066B; CN107317066A

Abstract

A heating control method and system for a power battery, and a storage medium. The method is applied to a heating control system for a power battery. The system comprises a power battery and a heating device used for heating the power battery. The method comprises: detecting whether a current environment of a power battery satisfies a preset heating condition; and when it is detected that the current environment of the power battery satisfies the heating condition, controlling the heating device to perform intermittent heating on the power battery.

Description

Power battery heating control method, system and storage medium

Cross-reference to related applications

This application claims the priority of the Chinese Patent Application No. "201710523928.1" filed on June 30, 2017 by Beijing New Energy Automobile Co., Ltd., entitled "Power Cell Heating Control Method and System".

Technical field

The present invention relates to the field of power battery technologies, and in particular, to a heating control method and system for a power battery.

Background technique

At present, the lithium ion power battery in the electric vehicle is slowly charged at a low temperature, and has a certain life damage to the power battery, so when the ambient temperature is low, the power battery needs to be heated. For example, when the temperature of the power battery is heated to a certain temperature (for example, 5 ° C) or more, the power battery can be normally charged with a large current.

In the related art, a power battery in an electric vehicle is usually continuously heated by a heating device. Wherein, the heating device is usually disposed at the bottom of the power battery, and when the battery is heated, the heat of the heating device is transmitted upward through the bottom of the power battery. However, when the dynamic rate of the heating device is large, the bottom and the top of each cell, the cell in the middle of the power battery module and the cell at the edge of the module will have a large temperature difference, sometimes even a large temperature difference. To 15 to 20 ° C, and this temperature difference will increase as the height of the power battery increases, thereby affecting the consistency and life of the power battery system.

Summary of the invention

The object of the present invention is to solve at least one of the above technical problems to some extent.

To this end, a first object of the present invention is to provide a heating control method for a power battery. The method can effectively utilize the heat conduction principle to balance the temperature of the cells in the power battery, thereby reducing the temperature difference between the cells in the power battery to an acceptable range for engineering applications, thereby ensuring the consistency and life of the battery system. And the cost is low and the efficiency is high.

A second object of the present invention is to provide a heating control system for a power battery.

A third object of the present invention is to provide a non-transitory computer readable storage medium.

In order to achieve the above object, a heating control method for a power battery according to a first aspect of the present invention is applied to a heating control system for a power battery, the system including a power battery for heating the power battery. a heating device, the method comprising: detecting whether a current environment of the power battery satisfies a preset heating condition; and controlling the heating device to the power when detecting that the current environment of the power battery satisfies the heating condition The battery is intermittently heated.

According to the heating control method of the power battery according to the embodiment of the present invention, it is possible to detect whether the current environment of the power battery satisfies a preset heating condition, and if so, control the heating device to intermittently heat the power battery. That is, by intermittently heating the power battery, the heat conduction principle can be effectively utilized, so that the temperature of the battery cells in the power battery is balanced, and the temperature difference between the cells in the power battery is reduced to an acceptable range for engineering applications, thereby ensuring The consistency and longevity of the battery system are low cost and high efficiency.

In order to achieve the above object, a heating control system for a power battery according to a second aspect of the present invention includes: a power battery, the power battery includes a plurality of batteries; and a heating device, wherein the heating device is disposed on the power battery Above the surface, the heating device is configured to heat the power battery; the control module is respectively connected to the power battery and the heating device, and the control module is configured to detect the power battery The heating device is controlled to intermittently heat the power battery when the current environment satisfies the heating condition.

According to the heating control system of the power battery according to the embodiment of the present invention, it is possible to detect whether the current environment of the power battery satisfies a preset heating condition, and if so, control the heating device to intermittently heat the power battery. That is, by intermittently heating the power battery, the heat conduction principle can be effectively utilized, so that the temperature of the battery cells in the power battery is balanced, and the temperature difference between the cells in the power battery is reduced to an acceptable range for engineering applications, thereby ensuring The consistency and longevity of the battery system are low cost and high efficiency.

In order to achieve the above object, a non-transitory computer readable storage medium according to a third aspect of the present invention has stored thereon a computer program, wherein the program is executed by a processor to implement the first aspect of the present invention. The heating control method of the power battery.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a flow chart of a heating control method of a power battery according to an embodiment of the present invention;

2 is an exemplary diagram of a plurality of timing control periods in a heating schedule in accordance with an embodiment of the present invention;

3 is a view showing an example of temperature difference between different temperature detection points in a power battery when heating according to a time series control cycle according to an embodiment of the present invention;

4 is a flow chart of controlling a heating device to intermittently heat a power battery according to an embodiment of the present invention;

5 is a schematic structural view of a heating control system of a power battery according to an embodiment of the present invention;

6 is a view showing an example of a structure between a heating device and a power battery according to an embodiment of the present invention;

7 is a schematic structural view of a heating control system of a power battery according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a heating control system of a power battery according to another embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A heating control method and system for a power battery according to an embodiment of the present invention will be described below with reference to the drawings.

1 is a flow chart of a heating control method of a power battery according to an embodiment of the present invention. It should be noted that the heating control method of the power battery according to the embodiment of the present invention can be applied to the heating control system of the power battery of the embodiment of the present invention. Wherein, the system may include a power battery, and a heating device for heating the power battery. As an example, the heating device may be an electric heating plate, and the shape of the power battery may be square.

As shown in FIG. 1, the heating control method of the power battery may include:

S110. Detect whether the current environment of the power battery meets a preset heating condition.

In the embodiment of the present invention, the heating condition may be that the ambient temperature is less than a preset threshold. It can be understood that the preset threshold may be determined by the charge and discharge performance of the power battery in a low temperature environment, for example, if the power battery has a relatively high charge and discharge performance in a low temperature environment, that is, the power battery can still be normal under a certain low temperature environment. For charging and discharging, the preset threshold can be set slightly smaller, such as -10 ° C; if the power battery has low charge and discharge performance in a low temperature environment, that is, the power battery cannot be normally charged and discharged under a certain low temperature environment, The preset threshold can be set slightly larger, such as 0 °C.

It should be noted that, in an embodiment of the present invention, when it is detected that the current environment of the power battery does not satisfy the preset heating condition, the power battery may be charged by the charging device.

S120. When it is detected that the current environment of the power battery satisfies the heating condition, the heating device is controlled to intermittently heat the power battery.

Specifically, when it is detected that the current environment of the power battery satisfies the heating condition, the power battery needs to be heated to some extent. In this step, the heating device can be controlled to intermittently heat the power battery, so that the temperature of the power battery can be Meet the charging conditions.

It can be understood that when a high temperature object and a low temperature object are in direct contact, the temperature difference between the two objects can be regarded as the initial temperature difference before the contact. With the extension of time, the low temperature object is heated and heated by the high temperature object, and the high temperature object is cooled and cooled by the low temperature object. After reaching a certain time, the temperature of the two objects can be basically the same, that is, the temperature is balanced.

The heating control method of the power battery according to the embodiment of the present invention utilizes the above physical phenomenon to perform intermittent heating by controlling the heating device to reduce the temperature difference between the cells in the power battery. In this step, the heating device may be controlled in a time series control manner to perform intermittent heating, or the heating device may be controlled to perform intermittent heating by detecting the current temperature of the power battery in real time. The two control modes will be described in detail by way of example below.

As an example, the specific implementation process of the above-mentioned control heating device for intermittently heating the power battery may be as follows: the heating device is controlled to intermittently heat the power battery according to the time series control mode.

Specifically, in the embodiment of the present invention, a preset heating schedule for the power battery may be acquired first, wherein the heating schedule has a plurality of timing control periods, and each timing control period includes the first time and the first Two times, wherein the first time in each timing control period is the same, and the second time in each timing control period gradually becomes larger as the number of heating times increases, and then, for each timing control period, the heating is controlled The device heats the power battery for a first time and stops heating the power battery for a second time. Wherein, in the embodiment of the present invention, the heating schedule may be an empirical value obtained by a large number of tests in advance.

That is to say, the power battery can be heated by the heating device for a period of time T (ie, the first time mentioned above), and then the heating is stopped for a period of time (ie, the second time), and the time period can pass the heat on the heating device through the contact surface. (ie, the contact surface between the heating device and the cell) is conducted to the cell, and the heat on the cell is conducted from the contact surface (ie, the contact surface between the cells) to other locations, that is, providing effective heat transfer. time. Thus, in the absence of new heat (ie, when the heating device is turned off, when heating is not performed), the longer the heat transfer time, the smaller the temperature difference between the inside of the cell and the cell, between the heating device and the cell. The greater the temperature difference, the longer it takes for heat equalization and temperature equalization.

For example, FIG. 2 is a diagram showing an example of a plurality of timing control periods in a heating schedule according to an embodiment of the present invention. As shown in FIG. 2, T is a first time, t2-t1, t4-t3, t6-t5, and "start charging. "Time-t7 is the second time, and t1-t0, t2-t1 are the first timing control period, t3-t2, t4-t3 are the second timing control period, t5-t4, t6-t5 are the first Three timing control periods, t7-t6, "start charging" time - t7 are the fourth timing control period. It can be seen that the second time in each timing control period gradually becomes larger as the number of heating times increases, so that as the heating time is accumulated, the heat of the heating device is increased, and the heat is required to conduct outward. The more time there is, the more time it takes to control the heating device to stop heating. In the case of controlling the heating device to heat the power battery through the timing control cycle in the above heating schedule, the temperature record of the power battery can be obtained as shown in FIG. 3, which is a different temperature in the power battery when heating according to the timing control cycle. An example of the temperature difference between the detection points, it can be seen that it is effective to use the timing control period to reduce the temperature difference between the cells in the power battery. When the power battery is heated, the battery temperature is within the chargeable range. And the temperature difference is much smaller than when the heating device is turned on, which can fully meet the current engineering application.

As another example, as shown in FIG. 4, the specific implementation process of controlling the heating device to intermittently heat the power battery may include the following steps:

S41. Control the heating device to heat the power battery. Wherein, in the present example, the power battery may include a plurality of cells.

S42, stopping the heating of the power battery after the third time, obtaining the temperature of the battery cell that is farthest from the heating device in the power battery, and obtaining the temperature difference between the battery with the maximum temperature and the battery with the minimum temperature.

Specifically, the heating device can be controlled to heat the power battery, and the heating of the power battery is stopped after a certain time (ie, the third time), and at this time, the battery cells in the power battery that are farthest from the heating device are collected. The temperature is calculated, and the temperature difference between the cell of the maximum temperature in the power cell and the cell of the minimum temperature is calculated.

Optionally, in one embodiment of the present invention, the number of the heating devices may be one or more. It should be noted that the number of the heating devices is different, and the positions of the cells farthest from the heating device are different. For example, when the number of heating devices is one, the heating device can be disposed at the bottom of the power battery, and the cell that is the farthest from the heating device can be a cell located at the top of the power battery. For another example, when the number of the heating devices is two, the two heating devices can be respectively disposed at the bottom and the top of the power battery, and the battery that is farthest from the heating device can be the power located at the center of the power battery. core.

In this step, after obtaining the temperature difference between the temperature of the cell farthest from the heating device and the cell of the maximum temperature and the cell of the minimum temperature, the farthest distance from the heating device can be determined. Whether the temperature of the cell is less than a first threshold and determining whether the temperature difference is less than or equal to a second threshold.

S43, when the temperature of the cell farthest from the heating device is less than the first threshold, and the temperature difference is less than or equal to the second threshold, the step of heating the power battery by the control heating device is re-executed, that is, returning to step S41.

S44. Control the charging device to charge the power battery when the temperature of the cell farthest from the heating device is greater than or equal to the first threshold.

Specifically, when it is determined that the temperature of the cell farthest from the heating device is greater than or equal to the first threshold, whether the temperature difference is less than or equal to the second threshold or greater than the second threshold, the charging is controlled. The device charges the power battery.

S45, when the temperature of the cell farthest from the heating device is less than the first threshold, and the temperature difference is greater than the second threshold, the heating of the power battery is continued to be stopped until the temperature difference is less than or equal to the second threshold. Re-executing the step of controlling the heating device to heat the power battery (ie, returning to step S41), or performing the control charging device on the power battery when the temperature of the cell farthest from the heating device is greater than or equal to the first threshold The charging step.

Specifically, when it is determined that the temperature of the cell farthest from the heating device is less than the first threshold, and the temperature difference is greater than the second threshold, it may be considered that the temperature of the power battery cannot meet the charging condition at this time, and The temperature difference is still greater than the second threshold, and the heating of the power battery can be stopped, that is, the heat conduction principle is continued, and the temperature balance between the cells is waited until the temperature difference is less than or equal to the second threshold, and the current and heating are performed. When the temperature of the cell farthest from the device is still less than the first threshold, the step of heating the power battery by the control heating device is re-executed (ie, returning to step S41). Or, when the heating of the power battery is continued to be stopped, and the temperature balance between the cells is waited for, so that the temperature of the cell farthest from the heating device is greater than or equal to the first threshold, the charging device can be controlled to start charging the power battery.

It should be noted that, in order to facilitate the control of heating and stopping the heating of the power battery, in the embodiment of the present invention, a power switch may be provided, and the power switch may be connected to the heating device to control the power switch. Closing and opening to control the heating device to intermittently heat the power battery. As an example, the power switch can be a relay. The relay may be a solenoid relay or a solid state relay.

In order to implement the above embodiment, the present invention also proposes a heating control system for a power battery.

FIG. 5 is a schematic structural view of a heating control system of a power battery according to an embodiment of the present invention. As shown in FIG. 5, the heating control system 50 of the power battery may include a power battery 51, a heating device 52, and a control module 53. The power battery 51 may include a plurality of cells 51a.

Specifically, the heating device 52 may be disposed above the surface of the power battery 51, and the heating device 52 may be used to heat the power battery 51. For example, assuming that the shape of the power battery 51 is square, the heating device 52 may be disposed at the bottom of the power battery 51 as shown in FIG.

The control module 53 is connected to the power battery 51 and the heating device 52, respectively, and the control module 53 can be used to control the heating device 52 to intermittently heat the power battery 51 when it is detected that the current environment of the power battery 51 satisfies the heating condition.

In an embodiment of the present invention, the control module 53 may control the heating device to perform intermittent heating in a time series control manner, or may also control the heating device to perform intermittent heating by detecting the current temperature of the power battery in real time. The two control modes will be described in detail by way of example below.

As an example, the specific implementation process of the control module 53 controlling the heating device 52 to intermittently heat the power battery 51 may be as follows: the heating device 52 is controlled to intermittently heat the power battery 51 in a time series control manner. Specifically, in an embodiment of the present invention, as shown in FIG. 7, the control module 53 may include an acquisition unit 531 and a control unit 532.

The obtaining unit 531 is configured to acquire a preset heating schedule for the power battery 51, wherein the heating schedule has a plurality of timing control periods, each timing control period includes a first time and a second time, wherein each The first time in each of the timing control periods is the same, and the second time in each of the timing control periods gradually becomes larger as the number of times of heating increases. The control unit 532 is for controlling the heating device 52 to heat the power battery 51 for the first time and stopping the heating of the power battery 51 for the second time for each timing control period.

As another example, the specific implementation process of the control module 53 controlling the heating device 52 to intermittently heat the power battery 51 may be as follows: controlling the heating device 52 to heat the power battery 51; stopping the power battery 51 after the third time Heating, obtaining the temperature of the cell 51a farthest from the heating device 52 in the power battery 51, and obtaining the temperature difference between the cell 51a of the maximum temperature and the cell 51a of the minimum temperature; at a distance from the heating device 52 When the temperature of the farthest cell 51a is less than the first threshold and the temperature difference is less than or equal to the second threshold, the step of heating the power battery 51 by the control heating device 52 is re-executed; the farthest distance from the heating device 52 When the temperature of the core 51a is greater than or equal to the first threshold, the charging device is controlled to charge the power battery 51; when the temperature of the battery cell 51a farthest from the heating device 52 is less than the first threshold, and the temperature difference is greater than the second threshold Continue to stop heating the power battery 51 until the control heating device 52 reheats the power battery 51 when the temperature difference is less than or equal to the second threshold. The step of controlling the charging device to charge the power battery 51 is performed when the temperature of the battery cell 51a farthest from the heating device 52 is greater than or equal to the first threshold.

Optionally, in one embodiment of the present invention, the number of the heating devices 52 may be one or more. It should be noted that the number of the heating devices 52 is different, and the positions of the cells 51a farthest from the heating device 52 are also different. For example, when the number of the heating devices 52 is one, the heating device 52 may be disposed at the bottom of the power battery 51, and the battery cells 51a farthest from the heating device 52 may be cells located at the top of the power battery 51. For another example, when the number of the heating devices 52 is two, the two heating devices 52 can be respectively disposed at the bottom and the top of the power battery 51, and the battery 51a farthest from the heating device 52 can be located at the power. The battery cell at the center of the battery 51.

In order to facilitate the control of heating and stopping the heating of the power battery, further, in an embodiment of the present invention, as shown in FIG. 8, the heating control system 50 may further include a power switch 54. Among them, the power switch 54 is connected to the heating device 52. In an embodiment of the invention, the control module 53 can control the heating device 52 to intermittently heat the power battery 51 by controlling the closing and opening of the power switch 54. As an example, the power switch 54 can be a relay. The relay may be a solenoid relay or a solid state relay.

In the description of the present invention, it is to be understood that the orientation or positional relationship of the terms "center", "upper", "lower", "top", "bottom", "inside", "outside", etc. is based on the drawings. The orientation or positional relationship shown is for the purpose of describing the present invention and the simplified description, and is not intended to indicate or imply that the device or component referred to has a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as a limits.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification and features of various embodiments or examples may be combined and combined without departing from the scope of the invention.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in an opposite order depending on the functions involved, in the order shown or discussed. It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer readable medium, Used in conjunction with, or in conjunction with, an instruction execution system, apparatus, or device (eg, a computer-based system, a system including a processor, or other system that can fetch instructions and execute instructions from an instruction execution system, apparatus, or device) Or use with equipment. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

One of ordinary skill in the art can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium.

The above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A heating control method for a power battery, characterized in that the method is applied to a heating control system of a power battery, the system comprising a power battery, a heating device for heating the power battery, the method comprising the following step:

Detecting whether the current environment of the power battery meets a preset heating condition;

The heating device is controlled to intermittently heat the power battery when it is detected that the current environment of the power battery satisfies the heating condition.
The method of claim 1 wherein said controlling said heating means to intermittently heat said power battery comprises:

The heating device is controlled to intermittently heat the power battery in a time series control manner.
The method according to claim 2, wherein said controlling said heating means to intermittently heat said power battery in a time series controlled manner comprises:

Obtaining a preset heating schedule for the power battery, wherein the heating schedule has a plurality of timing control periods, each timing control period including a first time and a second time, wherein each of the timings The first time in the control cycle is the same, and the second time in each of the timing control cycles gradually becomes larger as the number of times of heating increases;

For each of the timing control periods, the heating device is controlled to heat the power battery during the first time and to stop heating of the power battery during the second time.
The method of claim 1 wherein said power battery comprises a plurality of cells; wherein said controlling said heating means to intermittently heat said power battery comprises:

Controlling the heating device to heat the power battery;

Stopping heating of the power battery after the third time, acquiring the temperature of the battery cell in the power battery that is farthest from the heating device, and obtaining the cell of the maximum temperature and the cell of the minimum temperature Temperature difference

When the temperature of the cell farthest from the heating device is less than a first threshold, and the temperature difference is less than or equal to a second threshold, re-executing the controlling the heating device to perform the power battery Heating step;

Controlling the charging device to charge the power battery when the temperature of the cell farthest from the heating device is greater than or equal to the first threshold;

When the temperature of the cell farthest from the heating device is less than the first threshold, and the temperature difference is greater than the second threshold, the heating of the power battery is continued to be stopped until When the temperature difference is less than or equal to the second threshold, the step of controlling the heating device to heat the power battery is re-executed, or the cell having the farthest distance from the heating device is When the temperature is greater than or equal to the first threshold, the step of controlling the charging device to charge the power battery is performed.
A heating control system for a power battery, comprising:

a power battery, the power battery including a plurality of batteries;

a heating device disposed on a surface of the power battery, the heating device for heating the power battery;

a control module, the control module being respectively connected to the power battery and the heating device, wherein the control module is configured to control the heating device to the power when detecting that the current environment of the power battery satisfies the heating condition The battery is intermittently heated.
The system of claim 5, wherein the control module is specifically configured to:

The heating device is controlled to intermittently heat the power battery in a time series control manner.
The system of claim 6 wherein said control module comprises:

An acquisition unit, configured to acquire a preset heating schedule for the power battery, wherein the heating schedule has a plurality of timing control periods, each timing control period including a first time and a second time, where The first time in each of the timing control periods is the same, and the second time in each of the timing control periods gradually becomes larger as the number of times of heating increases;

a control unit, configured to, for each of the timing control periods, control the heating device to heat the power battery during the first time, and stop heating the power battery during the second time .
The system of claim 5, wherein the control module is specifically configured to:

Controlling the heating device to heat the power battery;

Stopping heating of the power battery after the third time, acquiring the temperature of the battery cell in the power battery that is farthest from the heating device, and obtaining the cell of the maximum temperature and the cell of the minimum temperature Temperature difference

Re-executing the controlling the heating device to perform the power battery when the temperature of the cell farthest from the heating device is less than a first threshold, and the temperature difference is less than or equal to a second threshold Heating step;

Controlling the charging device to charge the power battery when the temperature of the cell farthest from the heating device is greater than or equal to the first threshold;

When the temperature of the cell farthest from the heating device is less than the first threshold, and the temperature difference is greater than the second threshold, the heating of the power battery is continued to be stopped until When the temperature difference is less than or equal to the second threshold, the step of controlling the heating device to heat the power battery is performed again, or the cell having the farthest distance from the heating device is When the temperature is greater than or equal to the first threshold, the step of controlling the charging device to charge the power battery is performed.
The system of claim 5, further comprising:

a power switch, the power switch being connected to the heating device;

Wherein, the control module controls the heating device to intermittently heat the power battery by controlling the closing and opening of the power switch.
The system of claim 9 wherein said power switch is a relay.
A non-transitory computer readable storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the power battery according to any one of claims 1 to 4. Heating control method.