CN203445668U - Distributed battery management system - Google Patents
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- CN203445668U CN203445668U CN201320587529.9U CN201320587529U CN203445668U CN 203445668 U CN203445668 U CN 203445668U CN 201320587529 U CN201320587529 U CN 201320587529U CN 203445668 U CN203445668 U CN 203445668U
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- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 8
- 239000011449 brick Substances 0.000 description 5
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- 238000007599 discharging Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
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Abstract
Disclosed in the utility model is a distributed battery management system that is connected with N battery module groups formed by successive series connection of more than one single battery. The distributed battery management system comprises a driving board, N driven boards, and a high-voltage plate. The driving board is electrically connected with an external control circuit by an external CAN bus and is respectively and electrically connected with the N driven boards and the high-voltage plate by internal CAN bus. The N driven boards are respectively and electrically connected with N battery module groups in a one-to-one correspondence mode; the external CAN bus and the internal CAN bus are independent to each other; and the N is a random natural number larger than 1. With the distributed battery management system, one module group is formed by series connection of 12 single batteries at most and is collected and managed by one independent driven board. According to the scheme, the modularization design is employed and the voltage collection wire harness is shortest, so that the voltage collection precision as well as flexibility and security of the whole system design can be improved.
Description
Technical field
The utility model relates to cell management system of electric automobile technical field, relates in particular to a kind of distributed battery management system.
Background technology
The fail safe of electrokinetic cell and use cost are to affect the principal element that pure electric automobile is promoted.Based on present stage battery technology current situation, battery serviceability and life-span can not meet the requirement of electric automobile operation, for guaranteeing that battery performance is good, safe and reliable, forbid battery to be abused, with extending battery life, must battery be carried out rationally effectively management and be controlled.Therefore all dropping into a large amount of manpower and materials degree has carried out research extensively and profoundly to battery management system both at home and abroad.
Present stage, because the energy density of battery cell can't meet the requirement of car load to continual mileage, thus need to do parallel connection, series connection to battery cell, with As soon as possible Promising Policy user's request.But different pure electric vehicles are different to the designing requirement of continual mileage, the parameter of battery cell own is also different, therefore, different with the requirement of string number to battery cell number.And that the battery management system existing on market all belongs to is centralized.Although and centralized battery management system system circuit board parts number is few, cost is relatively low, exist system redundancy poor, long range simulation high-voltage wiring harness cost is relatively high, and fail safe is low, and the weakness such as system versatility, design flexibility be poor.
In addition, to current information, collection has two types of minute flowmeter and Hall type current sensors, the larger problem of Acquisition Error when these two kinds of acquisition scheme all exist null offset and little electric current to existing battery management system.To the error of current acquisition, by the precision having a strong impact on whole power brick SOC estimation, therefore improving current acquisition precision is to improve the preferred option of SOC precision.
Have, existing battery management system has the function that detects insulation resistance between high-tension line and power brick housing or car load chassis again, but detection method exists defect.Generally can only detect power brick exterior insulation resistance sizes, and for power brick internal short-circuit without effect.And, after connecting upper testing circuit, having a strong impact on the insulation effect of car load itself, car load insulation resistance is reduced to below 2M Europe above by original 500M Europe.
Monomer voltage collection in general battery management system, monomer temperature collection, bus current collection, busbar voltage collection, High-Voltage Insulation detection module etc. all need high-low pressure isolating chip, by battery pack high-pressure system and the isolation of car load low-pressure system, this scheme, by a large amount of isolating chip of needs, artificially increases system complexity.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of distributed battery management system is provided.
For achieving the above object, described distributed battery management system, connects N the battery modules being composed in series successively by an above cell, is characterized in, described distributed battery management system comprises a mainboard, a N slave plate and a hardboard, wherein,
Described mainboard is electrically connected to external control circuit by outside CAN bus; Described mainboard is electrically connected to a described N slave plate and described hardboard respectively by inner CAN bus;
Described N slave plate is electrically connected to N battery modules respectively correspondingly;
Described outside CAN bus and inner CAN bus are independent of one another; N is greater than 1 random natural number.
Preferably, described mainboard comprises,
The first central processing unit;
Data memory module, high-voltage relay control and feedback module, heater strip and the fan control and feedback module and the human-machine interface module that are electrically connected to described the first central processing unit respectively;
Motherboard power supply conversion module, described the first central processing unit is electrically connected to vehicle power by described motherboard power supply conversion module;
The one CAN communication module, described the first central processing unit is electrically connected to described outside CAN bus by a described CAN communication module; And,
The 2nd CAN communication module, described the first central processing unit is electrically connected to described inner CAN bus by described the 2nd CAN communication module.
Preferably, described slave plate comprises,
The second central processing unit;
The monomer battery voltage collection and balanced control module and the cell temperature collect module that are electrically connected to described the second central processing unit respectively;
Slave plate power isolation circuit module and slave plate power conversion module; Described the second central processing unit is electrically connected to described slave plate power conversion module by described slave plate power isolation circuit module; And,
Slave plate high-speed isolated circuit and the 3rd CAN communication module, described the second central processing unit is electrically connected to described the 3rd CAN communication module by described slave plate high-speed isolated circuit, and described the 3rd CAN communication module is electrically connected to described inner CAN bus.
Preferably, described the 3rd CAN communication module is electrically connected to described inner CAN bus by slave plate high speed magnetic isolating chip.
Preferably, described hardboard comprises,
The 3rd central processing unit;
The bus current acquisition module, busbar voltage acquisition module and the High-Voltage Insulation monitoring modular that are electrically connected to described the 3rd central processing unit respectively;
Hardboard power isolation circuit module and hardboard power conversion module; Described the 3rd central processing unit is electrically connected to described hardboard power conversion module by described hardboard power isolation circuit module; And,
Hardboard high-speed isolated circuit and the 4th CAN communication module, described the 3rd central processing unit is electrically connected to described the 4th CAN communication module by described hardboard high-speed isolated circuit; Described the 4th CAN communication module is electrically connected to described inner CAN bus.
Preferably, described the 4th CAN communication module is electrically connected to described inner CAN bus by hardboard high speed magnetic isolating chip.
Preferably, described bus current acquisition module is for adopting M range Hall current sensor, and wherein M is greater than 1 natural number.
Preferably, described bus current acquisition module is for adopting double-range Hall current sensor.
The beneficial effects of the utility model are,
(1) adopt distributed battery management system, a module is connected by 12 string cells at most, and by independently slave plate collection and management.This scheme adopts modularized design, and voltage acquisition wire harness is the shortest, can improve flexibility and the fail safe of voltage acquisition precision and whole system design.
(2) adopt double-range current sensor, can guarantee when little electric current, current acquisition error is in allowed band, increase in addition the high accurate A/D sample port of 24bit, increase to greatest extent the error on current acquisition, and the method for current sensor being proofreaied and correct when at every turn powering on, to solve current sensor Zero drift in main amplifier.
(3) adopt the High-Voltage Insulation observation circuit of high input impedance, not only can detect battery pack internal short-circuit, external short circuit, under lower power mode, can not affect the size of car load insulation resistance.
(4) at inner CAN bus communication place, adopt high-speed isolated chip to realize high-low pressure isolation, this scheme can reduce isolating chip quantity to greatest extent, reduces system complexity.
Accompanying drawing explanation
Fig. 1 shows the system construction drawing of distributed battery management system described in the utility model.
Fig. 2 shows the structural representation of the mainboard shown in Fig. 1.
Fig. 3 shows the structural representation of the slave plate shown in Fig. 1.
Fig. 4 shows the structural representation of the hardboard shown in Fig. 1.
Fig. 5 shows the schematic diagram of the high-low pressure isolation in distributed battery management system.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Fig. 1 shows the system construction drawing of distributed battery management system described in the utility model, as shown in Figure 1, described distributed battery management system comprises a mainboard, a N slave plate and a hardboard, and wherein, described mainboard is electrically connected to external control circuit by outside CAN bus 100; Described mainboard is electrically connected to a described N slave plate and described hardboard respectively by inner CAN bus.Described N slave plate is electrically connected to N battery modules respectively correspondingly, and each battery modules is composed in series successively by an above cell.Described outside CAN bus and inner CAN bus are independent of one another; N is greater than 1 random natural number.In above-mentioned distributed battery management system, a battery modules being composed in series by 12 cells at most, is responsible for collection and the management of signal by slave plate independently.This scheme adopts modularized design, and voltage acquisition wire harness is the shortest, improves flexibility and the fail safe of voltage acquisition precision and whole system design.
Details are as follows for the operation principle of above-mentioned distributed battery management system: this battery management system has powering on, charges, electric discharge, four kinds of mode of operations of dormancy, and charging is preferential.Between mainboard, slave plate, three modules of hardboard, by inner CAN bus 200, intercourse information.Voltage, the temperature of slave plate Real-Time Monitoring cell corresponding thereto, the information such as the total voltage of hardboard Real-Time Monitoring battery modules, bus current, insulation resistance, the signal of slave plate and hardboard collection all reports to mainboard by inner CAN bus 200.Mainboard is by car load devices exchange data information such as outside CAN bus 100 and entire car controller, electric machine controller, onboard charger, instrument, and can obtain car load control command by interface circuit, realize the real-time control of high-voltage relay, fan, heater strip etc.Mainboard is according to slave plate, hardboard reporting information, more comprehensive car load control command etc., realize the management to battery charge or discharge, and according to the dump energy of certain algorithm real-time estimation battery, as user's guide for use.This battery management system, adopts distributed frame, is applicable to the battery modules of different string numbers, can, by user's flexible configuration slave plate number as required, realize the modularization of battery management system design.
Particularly, Fig. 2 shows the structural representation of the mainboard shown in Fig. 1, as shown in Figure 2, described mainboard comprise the first central processing unit, data memory module, high-voltage relay control and feedback module, heater strip and fan control and feedback module, for accepting key, charging, the human-machine interface module of signal such as wake up, for motherboard power supply conversion module, a CAN communication module and the 2nd CAN communication module to whole battery management system power supply.Wherein, (for example, EEPROM), high-voltage relay control is electrically connected to feedback module and human-machine interface module with feedback module, heater strip and fan control described the first central processing unit with data memory module respectively; Described the first central processing unit is electrically connected to vehicle power by described motherboard power supply conversion module; Described the first central processing unit is electrically connected to described outside CAN bus 100 by a described CAN communication module, and then be electrically connected to external control circuit, in an embodiment of the present utility model, described mainboard is by real-time exchange information between a CAN communication module and outside CAN bus 100 and entire car controller, onboard instruments, electric machine controller, onboard charger, and can obtain key by hardwire interface, charging such as wakes up at the various control informations, the management of charging and discharging of comprehensive above various information realizations to battery pack, realizes car load and discharges and recharges safety and optimize; Described the first central processing unit is electrically connected to described inner CAN bus 200 by described the 2nd CAN communication module.
Fig. 3 shows the structural representation of the slave plate shown in Fig. 1, as shown in Figure 3, described slave plate comprise the second central processing unit, monomer battery voltage collection and balanced control module, cell temperature collect module, slave plate power isolation circuit module, for slave plate power conversion module, slave plate high-speed isolated circuit and the 3rd CAN communication module to whole slave plate power supply.Wherein, described the second central processing unit is electrically connected to balanced control module and cell temperature collect module with monomer battery voltage collection respectively; Described the second central processing unit is electrically connected to described slave plate power conversion module by described slave plate power isolation circuit module; Described the second central processing unit is electrically connected to described the 3rd CAN communication module by described slave plate high-speed isolated circuit, and described the 3rd CAN communication module is electrically connected to described inner CAN bus 200.And monomer battery voltage collection adopts LTC6802 battery special chip with balanced control module, because this battery special chip can gather the voltage of 12 string cells at most, therefore the cell in a battery modules is no more than 12 strings.This chip internal has balanced control switch, can be for controlling each cell is balanced.Cell temperature collect module is used NTC thermosensitive resistance type temperature sensor, the temperature signal that temperature sensor collects after filtering after, directly deliver to the AD thief hatch of the second central processing unit, a battery modules can gather at most 3 tunnel temperature, can be arranged by user flexibility.
Fig. 4 shows the structural representation of the hardboard shown in Fig. 1, as shown in Figure 4, described hardboard comprises the 3rd central processing unit, bus current acquisition module, busbar voltage acquisition module, High-Voltage Insulation monitoring modular, hardboard power isolation circuit module, hardboard power conversion module and the 4th CAN communication module for powering to whole hardboard.Wherein, described the 3rd central processing unit is electrically connected to bus current acquisition module, busbar voltage acquisition module and High-Voltage Insulation monitoring modular respectively; Described the 3rd central processing unit is electrically connected to described hardboard power conversion module by described hardboard power isolation circuit module; Described the 3rd central processing unit is electrically connected to described the 4th CAN communication module by described hardboard high-speed isolated circuit; Described the 4th CAN communication module is electrically connected to described inner CAN bus 200.And High-Voltage Insulation monitoring modular adopts the testing circuit of high input impedance, and in lower electric situation, do not affect car load insulating resistance value size.This insulating monitoring circuit can be measured the insulating resistance value of car load, and when car load insulation resistance is less than 500 Europe/volt, disconnects battery pack high-voltage relay, guarantees driver and passenger safety.
Especially, described bus current acquisition module, for adopting double-range Hall current sensor, by the voltage signal of the reflection size of current collecting, is sent into the AD sampling A/D chip of special 24bit precision, can obtain higher current acquisition precision.This current sensor is double-range, and two ranges of 0～30A and 0～300A, can guarantee the current acquisition precision when little electric current.Have, busbar voltage acquisition module is used simple bleeder circuit again, will after stagnation pressure dividing potential drop, directly send into the AD thief hatch of the 3rd central processing unit, and for improving the acquisition precision of stagnation pressure, divider resistance must be selected precision resistance.
In addition, Fig. 5 shows the schematic diagram of the high-low pressure isolation in distributed battery management system, as shown in Figure 5, described the 3rd CAN communication module is electrically connected to described inner CAN bus 200 by slave plate high speed magnetic isolating chip (preferred isolation method), by the communication of the isolating chip realization of slave plate high speed magnetic and mainboard and hardboard.And described the 4th CAN communication module is electrically connected to described inner CAN bus 200 by hardboard high speed magnetic isolating chip; By the communication of the isolating chip realization of hardboard high speed magnetic and mainboard and slave plate.Here, mainboard ground adopts ground, car load chassis, and other modular circuit earth terminal of slave plate adopts the negative pole of first series connection cell of this module, and other modular circuit earth terminals of hardboard adopt the negative pole of whole power brick.Mainboard, slave plate, hardboard utilize high speed magnetic isolating chip by inner CAN bus 200 interactive information places, by high-low pressure isolate, this scheme is realizing on the basis of high-low pressure isolation features, can reduce to greatest extent the quantity that isolating chip is used, reduce the complexity of circuit, the minimizing system probability of makeing mistakes.
Embodiment shown in above foundation is graphic describes structure of the present utility model, feature and action effect in detail; the foregoing is only preferred embodiment of the present utility model; but the utility model does not limit practical range with shown in drawing; every change of doing according to conception of the present utility model; or be revised as the equivalent embodiment of equivalent variations; when not exceeding yet specification and illustrating contain spiritual, all should be in protection range of the present utility model.
Claims (8)
1. a distributed battery management system, connects N the battery modules being composed in series successively by an above cell, it is characterized in that: described distributed battery management system comprises a mainboard, a N slave plate and a hardboard, wherein,
Described mainboard is electrically connected to external control circuit by outside CAN bus; Described mainboard is electrically connected to a described N slave plate and described hardboard respectively by inner CAN bus;
Described N slave plate is electrically connected to N battery modules respectively correspondingly;
Described outside CAN bus and inner CAN bus are independent of one another; N is greater than 1 random natural number.
2. distributed battery management system according to claim 1, is characterized in that: described mainboard comprises,
The first central processing unit;
Data memory module, high-voltage relay control and feedback module, heater strip and the fan control and feedback module and the human-machine interface module that are electrically connected to described the first central processing unit respectively;
Motherboard power supply conversion module, described the first central processing unit is electrically connected to vehicle power by described motherboard power supply conversion module;
The one CAN communication module, described the first central processing unit is electrically connected to described outside CAN bus by a described CAN communication module; And,
The 2nd CAN communication module, described the first central processing unit is electrically connected to described inner CAN bus by described the 2nd CAN communication module.
3. distributed battery management system according to claim 1, is characterized in that: described slave plate comprises,
The second central processing unit;
The monomer battery voltage collection and balanced control module and the cell temperature collect module that are electrically connected to described the second central processing unit respectively;
Slave plate power isolation circuit module and slave plate power conversion module; Described the second central processing unit is electrically connected to described slave plate power conversion module by described slave plate power isolation circuit module; And,
Slave plate high-speed isolated circuit and the 3rd CAN communication module, described the second central processing unit is electrically connected to described the 3rd CAN communication module by described slave plate high-speed isolated circuit, and described the 3rd CAN communication module is electrically connected to described inner CAN bus.
4. distributed battery management system according to claim 3, is characterized in that: described the 3rd CAN communication module is electrically connected to described inner CAN bus by slave plate high speed magnetic isolating chip.
5. distributed battery management system according to claim 1, is characterized in that: described hardboard comprises,
The 3rd central processing unit;
The bus current acquisition module, busbar voltage acquisition module and the High-Voltage Insulation monitoring modular that are electrically connected to described the 3rd central processing unit respectively;
Hardboard power isolation circuit module and hardboard power conversion module; Described the 3rd central processing unit is electrically connected to described hardboard power conversion module by described hardboard power isolation circuit module; And,
Hardboard high-speed isolated circuit and the 4th CAN communication module, described the 3rd central processing unit is electrically connected to described the 4th CAN communication module by described hardboard high-speed isolated circuit; Described the 4th CAN communication module is electrically connected to described inner CAN bus.
6. distributed battery management system according to claim 5, is characterized in that: described the 4th CAN communication module is electrically connected to described inner CAN bus by hardboard high speed magnetic isolating chip.
7. distributed battery management system according to claim 5, is characterized in that: described bus current acquisition module is for adopting M range Hall current sensor, and wherein M is greater than 1 natural number.
8. distributed battery management system according to claim 7, is characterized in that: described bus current acquisition module is for adopting double-range Hall current sensor.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104553850A (en) * | 2014-12-25 | 2015-04-29 | 郑州精益达汽车零部件有限公司 | Data collection unit of battery management system |
| CN104578124A (en) * | 2014-12-25 | 2015-04-29 | 宁德时代新能源科技有限公司 | Battery energy storage management system |
| CN105425023A (en) * | 2015-11-03 | 2016-03-23 | 安徽江淮汽车股份有限公司 | Battery pack voltage collection system and method |
| CN106379188A (en) * | 2016-09-30 | 2017-02-08 | 华南理工大学 | Energy management system for power battery of electric automobile and safety protection method |
| CN106864286A (en) * | 2017-02-23 | 2017-06-20 | 欣旺达电动汽车电池有限公司 | Distributed high-low pressure split cell management method and system |
| CN106953386A (en) * | 2017-04-28 | 2017-07-14 | 镇江科信动力系统设计研究有限公司 | The passive balance control system and its control method of a kind of battery bag |
| CN107492684A (en) * | 2016-12-12 | 2017-12-19 | 宝沃汽车（中国）有限公司 | The battery management system and vehicle of electrokinetic cell |
| CN107872092A (en) * | 2017-10-31 | 2018-04-03 | 湖南文理学院 | A Distributed Parallel Battery Management System |
| CN111546936A (en) * | 2020-04-21 | 2020-08-18 | 汉腾汽车有限公司 | Method for detecting change of contact resistance of battery pack manual Maintenance Switch (MSD) of new energy automobile |
| CN112217275A (en) * | 2020-09-10 | 2021-01-12 | 浙江衡睿科技有限公司 | Vehicle-mounted double-battery system |
| CN112271410A (en) * | 2020-10-20 | 2021-01-26 | 中国第一汽车股份有限公司 | Power battery and driving equipment |
| CN116154329A (en) * | 2022-12-06 | 2023-05-23 | 北京新能源汽车股份有限公司 | Battery Management Systems, Battery Packs and Vehicles |
| CN117523940A (en) * | 2024-01-08 | 2024-02-06 | 深圳风向标教育资源股份有限公司 | Power battery management system and practical training teaching platform |
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2013
- 2013-09-23 CN CN201320587529.9U patent/CN203445668U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104553850A (en) * | 2014-12-25 | 2015-04-29 | 郑州精益达汽车零部件有限公司 | Data collection unit of battery management system |
| CN104578124A (en) * | 2014-12-25 | 2015-04-29 | 宁德时代新能源科技有限公司 | Battery energy storage management system |
| CN105425023A (en) * | 2015-11-03 | 2016-03-23 | 安徽江淮汽车股份有限公司 | Battery pack voltage collection system and method |
| CN106379188A (en) * | 2016-09-30 | 2017-02-08 | 华南理工大学 | Energy management system for power battery of electric automobile and safety protection method |
| CN107492684A (en) * | 2016-12-12 | 2017-12-19 | 宝沃汽车（中国）有限公司 | The battery management system and vehicle of electrokinetic cell |
| CN106864286A (en) * | 2017-02-23 | 2017-06-20 | 欣旺达电动汽车电池有限公司 | Distributed high-low pressure split cell management method and system |
| CN106953386A (en) * | 2017-04-28 | 2017-07-14 | 镇江科信动力系统设计研究有限公司 | The passive balance control system and its control method of a kind of battery bag |
| CN107872092A (en) * | 2017-10-31 | 2018-04-03 | 湖南文理学院 | A Distributed Parallel Battery Management System |
| CN111546936A (en) * | 2020-04-21 | 2020-08-18 | 汉腾汽车有限公司 | Method for detecting change of contact resistance of battery pack manual Maintenance Switch (MSD) of new energy automobile |
| CN112217275A (en) * | 2020-09-10 | 2021-01-12 | 浙江衡睿科技有限公司 | Vehicle-mounted double-battery system |
| CN112271410A (en) * | 2020-10-20 | 2021-01-26 | 中国第一汽车股份有限公司 | Power battery and driving equipment |
| WO2022083163A1 (en) * | 2020-10-20 | 2022-04-28 | 中国第一汽车股份有限公司 | Power battery and driving device |
| CN116154329A (en) * | 2022-12-06 | 2023-05-23 | 北京新能源汽车股份有限公司 | Battery Management Systems, Battery Packs and Vehicles |
| CN116154329B (en) * | 2022-12-06 | 2025-07-15 | 北京新能源汽车股份有限公司 | Battery management system, battery pack, and vehicle |
| CN117523940A (en) * | 2024-01-08 | 2024-02-06 | 深圳风向标教育资源股份有限公司 | Power battery management system and practical training teaching platform |
| CN117523940B (en) * | 2024-01-08 | 2024-04-19 | 深圳风向标教育资源股份有限公司 | Power battery management system and practical training teaching platform |
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