CN218633412U

CN218633412U - USB PD power supply quick charging control circuit and device

Info

Publication number: CN218633412U
Application number: CN202223106911.1U
Authority: CN
Inventors: 蔡贵金
Original assignee: Shenzhen Liantianxia Electronic Technology Co ltd
Current assignee: Shenzhen Liantianxia Electronic Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-14
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses a USB PD's power fills control circuit and device soon, a USB PD's power fills control circuit soon includes: the system comprises a power supply management module, a converter control module, an insertion detection module, a lithium battery protection module, an over-temperature detection module and a lithium battery pack; the power management module is electrically connected with the converter control module, the insertion detection module, the lithium battery protection module, the over-temperature detection module and the lithium battery pack respectively; the insertion detection module is electrically connected with the converter control module, the converter control module is electrically connected with the lithium battery pack, and the lithium battery pack is electrically connected with the lithium battery protection module. The utility model discloses can realize portable power source's high-power electric energy transmission, save charge time, and can guarantee that portable power source charge-discharge process's safety goes on, and the reliability is high.

Description

USB PD power supply quick charging control circuit and device

Technical Field

The utility model relates to a charge control technical field especially relates to a USB PD's power is fast fills control circuit and device.

Background

With the advent of the intelligent era, electronic devices such as mobile phones, tablets, notebook computers and the like are developing in the direction of intellectualization and screen enlargement, but the cruising problem of the devices is brought at the same time. Moving power supplies on the market today are gradually moving from low power to high power transmission, where fast charging protocols are the key technology to achieve high power transmission. The USB-PD protocol is a quick charging protocol based on a Type-C interface, and the USB-PD protocol is more and more popular at the Type-C interface and has natural advantages nowadays.

However, in the prior art, the portable power source based on the USB PD rapid charging protocol still has the problems of over-temperature, over-discharge, over-charging, and the like during the charging and discharging process, and does not properly protect the lithium battery inside the portable power source, so that the portable power source is easy to be damaged, and the service life of the portable power source is reduced. Therefore, the invention relates to a power supply quick-charging control circuit of a USB PD, which is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a USB PD's power is fast fills control circuit and device, in this scheme, when the charger connects the people to insert detection module, earlier through inserting detection module and detect, after the power management module confirms for the charger, according to the state that input voltage drive converter control module made it work at the step-down or step-up, form the return circuit and charge for lithium cell group: the lithium battery protection module is connected between the negative electrode of the lithium battery pack and the ground in series, and can control the connection and disconnection of the whole system loop through the lithium battery protection module to perform charging protection; the excess temperature detection module is used for the temperature variation of the charge-discharge in-process of real-time supervision lithium cell group to guarantee that the safety of charging process goes on, thereby the utility model discloses can realize portable power source's high-power electric energy transmission, save charge-time, and can guarantee that portable power source charge-discharge process's safety goes on, the reliability is high.

In order to solve the technical problem, the application provides a power supply quick-charging control circuit of a USB PD, which comprises a power supply management module, a converter control module, an insertion detection module, a lithium battery protection module, an over-temperature detection module and a lithium battery pack;

the power supply management module is electrically connected with the converter control module, the insertion detection module, the lithium battery protection module, the over-temperature detection module and the lithium battery pack respectively;

the insertion detection module is electrically connected with the converter control module, the converter control module is electrically connected with the lithium battery pack, and the lithium battery pack is electrically connected with the lithium battery protection module.

Preferably, the power supply fast charging control circuit of the USB PD further includes an auxiliary power supply module;

the auxiliary power supply module is electrically connected with the power management module and is used for charging the power management module.

Preferably, the over-temperature detection module comprises a thermistor and a first resistor;

the first end of the thermistor and the first end of the first resistor are electrically connected with the power management module, and the second end of the thermistor and the second end of the first resistor are grounded.

Preferably, the lithium battery protection module comprises a lithium battery protection unit and a first switch control unit;

the lithium battery protection unit is respectively electrically connected with the lithium battery pack and the power management module, and the first switch control unit is respectively electrically connected with the lithium battery protection unit and the lithium battery pack.

Preferably, the insertion detection module includes a TypeC interface unit, a USB interface unit, and a second switch control unit;

the USB interface unit is respectively electrically connected with the power management module and the second switch control unit, the second switch control unit is respectively electrically connected with the power management module and the TypeC interface unit, the USB interface unit is used for being electrically connected with an output load, and the TypeC interface unit is used for being electrically connected with the output load or a charger.

Preferably, the converter control module includes a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, an inductor, a first capacitor, and a second capacitor;

the drain electrode of first MOS pipe reaches the first end of first electric capacity with the anodal electricity of lithium cell group is connected, the source electrode of first MOS pipe respectively with the first end of inductance reaches the drain electrode electricity of second MOS pipe is connected, the second end of inductance respectively with the source electrode of third MOS pipe reaches the drain electrode electricity of fourth MOS pipe is connected, the drain electrode of third MOS pipe respectively with the first end of second electric capacity and the anodal electricity of input voltage are connected, the second end of first electric capacity the source electrode of second MOS pipe the source electrode of fourth MOS pipe the second end of second electric capacity and input voltage negative pole electricity are connected.

Preferably, the chip model of the power management module is EDP3010.

Preferably, the chip model of the lithium battery protection unit is LT6034A.

Preferably, the auxiliary power supply module includes a low dropout linear regulator, a third capacitor, a fourth capacitor and a fifth capacitor;

the input end of the low-dropout linear regulator is respectively electrically connected with the first end of the third capacitor and the lithium battery pack, the output end of the low-dropout linear regulator is respectively electrically connected with the first end of the fourth capacitor, the first end of the fifth capacitor and the power management module, and the second ends of the third capacitor, the fourth capacitor and the fifth capacitor are grounded.

In order to solve the technical problem, the application provides a power supply quick-charging control device of a USB PD, which comprises the power supply quick-charging control circuit of the USB PD.

The utility model discloses a USB PD's power fills control circuit soon has following beneficial effect, the utility model discloses a USB PD's power fills control circuit soon includes: the system comprises a power supply management module, a converter control module, an insertion detection module, a lithium battery protection module, an over-temperature detection module and a lithium battery pack; the power supply management module is electrically connected with the converter control module, the insertion detection module, the lithium battery protection module, the over-temperature detection module and the lithium battery pack respectively; the insertion detection module is electrically connected with the converter control module, the converter control module is electrically connected with the lithium battery pack, and the lithium battery pack is electrically connected with the lithium battery protection module. When the charger connects the people and inserts detection module, earlier through inserting detection module and detecting, after power management module confirms for the charger, according to input voltage drive converter control module makes it work at the state that steps down or step up, form the return circuit and charge for lithium cell group: the lithium battery protection module is connected between the negative electrode of the lithium battery pack and the ground electrode in series, and can control the connection and disconnection of the whole system loop through the lithium battery protection module to perform charging protection; the over-temperature detection module is used for monitoring the temperature change of the lithium battery pack in the charging and discharging process in real time so as to ensure the safety of the charging process. Therefore, the utility model discloses can realize portable power source's high-power transmission, save charge time, and can guarantee that portable power source charge-discharge process's safety goes on, and the reliability is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:

fig. 1 is a schematic block diagram of a power supply quick charge control circuit of a USB PD according to a preferred embodiment of the present invention;

fig. 2 is a schematic block diagram of a power supply fast charging control circuit of a USB PD according to another preferred embodiment of the present invention;

fig. 3 is a schematic circuit diagram of an auxiliary power module of a power quick-charging control circuit of a USB PD according to a preferred embodiment of the present invention;

fig. 4 is a schematic circuit diagram of an over-temperature detection module of a power supply quick charge control circuit of a USB PD according to a preferred embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a lithium battery protection module of a power supply quick charge control circuit of a USB PD according to a preferred embodiment of the present invention;

fig. 6 is a schematic circuit diagram of an insertion detection module of the power quick-charging control circuit of the USB PD according to the preferred embodiment of the present invention;

fig. 7 is a schematic circuit diagram of a converter control module of a power supply fast charging control circuit of a USB PD according to a preferred embodiment of the present invention.

Detailed Description

The core of this application provides a USB PD's power control circuit and device that fills soon, and in this scheme, when the charger connects the people and inserts detection module, earlier through inserting detection module and detect, after the power management module confirms for the charger, according to input voltage drive converter control module makes it work at the state that steps down or step up, forms the return circuit and charges for lithium cell group: the lithium battery protection module is connected between the negative electrode of the lithium battery pack and the ground electrode in series, and can control the connection and disconnection of the whole system loop through the lithium battery protection module to perform charging protection; the temperature change that the excess temperature detection module is used for the charge-discharge process of real-time supervision lithium cell group to guarantee that the safety of charging process goes on, thereby the utility model discloses can realize portable power source's high-power electric energy transmission, save charge time, and can guarantee that portable power source charge-discharge process's safety goes on, the reliability is high.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic block diagram of a power supply quick charge control circuit of a USB PD according to the present disclosure, which includes a power supply management module 1, a converter control module 2, an insertion detection module 3, a lithium battery protection module 4, an over-temperature detection module 5, and a lithium battery pack 6;

the power management module 1 is respectively and electrically connected with the converter control module 2, the insertion detection module 3, the lithium battery protection module 4, the over-temperature detection module 5 and the lithium battery pack 6;

the insertion detection module 3 is electrically connected with the converter control module 2, the converter control module 2 is electrically connected with the lithium battery pack 6, and the lithium battery pack 6 is electrically connected with the lithium battery protection module 4.

In the prior art, the portable power source based on the USB PD rapid charging protocol still has the problems of over-temperature, over-discharge, over-charging and the like in the charging and discharging process, and a lithium battery in the portable power source is not properly protected, so that the portable power source is easy to damage, and the service life of the portable power source is shortened.

Aiming at the defects, the high-power electric energy transmission of the mobile power supply is realized through the matching of the power supply management module 1, the converter control module 2, the insertion detection module 3, the lithium battery protection module 4, the over-temperature detection module 5 and the lithium battery pack 6, the charging time is saved, the safe operation of the mobile power supply in the charging and discharging process can be ensured, and the reliability is high.

Specifically, in this embodiment, when the charger is plugged into the detection module 3, the detection is performed by the plugging detection module 3, and after the power management module 1 determines that the charger is a charger, the internal switching tube is turned on to flow through the converter control module 2, and the switching tube of the converter control module 2 is driven to operate in a voltage reduction or voltage increase state according to the input voltage, and then the lithium battery protection module 4 and the lithium battery pack 6 are connected to form a complete loop. It can be understood that, in this embodiment, the lithium battery protection module 4 is connected in series between the negative electrode of the lithium battery pack 6 and the ground, and the lithium battery protection module 4 can control the on and off of the whole system loop, so that the lithium battery can be protected in time when the lithium battery is in an abnormal working condition.

Specifically, in this embodiment, in addition to the protection of the system by the lithium battery protection module 4, the over-temperature detection module 5 also performs over-temperature protection, and the power management module 1 performs protection by collecting voltage and current data through the AD according to functions such as over-current protection, under-voltage protection, and over-voltage protection built in the power management module 1. It will be appreciated that when the system is operating in the discharge mode, the basic operation is the same, with the current and voltage flowing in different directions.

In summary, the present application provides a power supply quick charge control circuit of a USB PD, which in this scheme includes a power supply management module 1, a converter control module 2, an insertion detection module 3, a lithium battery protection module 4, an over-temperature detection module 5, and a lithium battery pack 6; when the charger connects the people and inserts detection module 3, earlier through inserting detection module 3 and detect, power management module 1 confirms behind the charger, according to the state that input voltage drive converter control module 2 made it work at the step-down or step-up, forms the return circuit and charges for lithium cell group 6: the lithium battery protection module 4 is connected in series between the negative electrode of the lithium battery pack 6 and the ground, and the lithium battery protection module 4 can control the connection and disconnection of the whole system loop to perform charging protection; the over-temperature detection module 5 is used for monitoring the temperature change of the lithium battery pack 6 in the charging and discharging process in real time so as to ensure the safety of the charging process.

On the basis of the above-described embodiment:

referring to fig. 2, fig. 2 is a schematic block diagram of a power supply fast charging control circuit of a USB PD according to the present disclosure.

Referring to fig. 3, fig. 3 is a schematic circuit diagram of an auxiliary power module according to the present disclosure.

As a preferred embodiment, the power supply fast charging control circuit of a USB PD further includes an auxiliary power supply module 7;

the auxiliary power supply module 7 is electrically connected with the power management module 1, and the auxiliary power supply module 7 is used for charging the power management module 1.

In a preferred embodiment, the auxiliary power module 7 includes a low dropout linear regulator U2, a third capacitor C15, a fourth capacitor C16, and a fifth capacitor C17;

the input end of the low dropout linear regulator U2 is electrically connected with the first end of the third capacitor C15 and the lithium battery pack 6 respectively, the output end of the low dropout linear regulator U2 is electrically connected with the first end of the fourth capacitor C16, the first end of the fifth capacitor C17 and the power management module 1 respectively, and the second ends of the third capacitor C15, the fourth capacitor C16 and the fifth capacitor C17 are grounded.

Specifically, auxiliary power module 7 is used for supplying power for power management module 1, and this application adopts 3.6V low-dropout linear voltage regulator power supply chip ME6203, and ME6203 has the advantages of simple peripheral circuit, high withstand voltage value, high output voltage precision and low temperature drift, low cost.

Referring to fig. 4, fig. 4 is a schematic circuit diagram of an over-temperature detection module according to the present disclosure.

As a preferred embodiment, the over-temperature detecting module 5 includes a thermistor NTC1 and a first resistor Rx;

the first end of the thermistor NTC1 and the first end of the first resistor Rx are both electrically connected to the power management module 1, and the second end of the thermistor NTC1 and the second end of the first resistor Rx are grounded.

Specifically, in this embodiment, a constant current source and an AD sampling interface are integrated in a TH pin of the power management module 1, a thermistor NTC1 is configured outside the TH pin and is placed in the lithium battery, and when the temperature of the lithium battery changes, the resistance of the thermistor NTC1 also changes, so that the voltage on the TH pin also changes accordingly, the system can acquire temperature information of the lithium battery by collecting the voltage of the TH pin through the AD, and when the temperature exceeds a temperature range, the system can stop working immediately to ensure safe working of the lithium battery.

Referring to fig. 5, fig. 5 is a schematic circuit diagram of a lithium battery protection module provided in the present application.

As a preferred embodiment, the lithium battery protection module 4 includes a lithium battery protection unit 41 and a first switch control unit 42;

the lithium battery protection unit 41 is electrically connected to the lithium battery pack 6 and the power management module 1, and the first switch control unit 42 is electrically connected to the lithium battery protection unit and the lithium battery pack 6.

As a preferred embodiment, the chip model of the lithium battery protection unit 41 is LT6034A.

Specifically, the lithium battery protection module 4 is used for preventing the problems of overcharge, overdischarge and the like of the lithium battery in the charging and discharging processes; in this embodiment, the lithium battery protection unit 41 adopts an HLT6034A lithium battery protection chip, which can monitor a single battery, and the MOSFET in the external first switch control unit 42 of the lithium battery protection circuit is in a conducting state under normal working conditions, and once the lithium battery protection chip detects that the MOSFET is turned off immediately when abnormal conditions occur, the power is cut off, so that the lithium battery protection function is realized.

Referring to fig. 6, fig. 6 is a schematic circuit diagram of an insertion detection module according to the present disclosure.

As a preferred embodiment, the insertion detection module 3 includes a TypeC interface unit 31, a USB interface unit 32, and a second switch control unit 33;

the USB interface unit 32 is electrically connected to the power management module 1 and the second switch control unit 33, the second switch control unit 33 is electrically connected to the power management module 1 and the TypeC interface unit, the USB interface unit 32 is electrically connected to the output load, and the TypeC interface unit 31 is electrically connected to the output load or the charger.

Specifically, when the system is in a standby state, the power management module 1 raises the potential of the OUT2 network in the USB interface unit 32 through the resistor R2 of 100kQ, the power management module 1 determines through the potential of the OUT2, and once the potential is lowered, the power management module 1 detects a low level, it determines that there is a load plug, and then starts the system and turns on the switch tube Q2 to start outputting power to the load.

Specifically, the USBTpye-C interface in the TypeC interface unit 31 is a bidirectional 1:1, the interface can be used as an output interface and an input interface, and the judgment logic of the interface is as follows: when the system is in a standby state, the CC line on the interface is in a state of continuous switching of pull-up and pull-down, if a load is connected in the CC pull-up state, the CC line voltage can be detected to be pulled down by the load, the load is judged to be connected at the moment, and the system is started to supply power to the CC line: if a charger is inserted into the port C, the voltage of the charger can be detected when the CC line is in a pull-down state, and the charger can be judged to be connected after the pull-down state detects that the voltage on the port C is connected for a period of time.

Referring to fig. 7, fig. 7 is a schematic circuit diagram of a converter control module according to the present disclosure.

As a preferred embodiment, the converter control module 2 includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, an inductor L, a first capacitor, and a second capacitor;

the drain electrode of the first MOS tube Q1 and the first end of the first capacitor are electrically connected with the positive electrode of the lithium battery pack 6, the source electrode of the first MOS tube Q1 is electrically connected with the first end of the inductor and the drain electrode of the second MOS tube Q2 respectively, the second end of the inductor is electrically connected with the source electrode of the third MOS tube Q3 and the drain electrode of the fourth MOS tube Q4 respectively, the drain electrode of the third MOS tube Q3 is electrically connected with the first end of the second capacitor and the positive electrode of the input voltage respectively, the second end of the first capacitor, the source electrode of the second MOS tube Q2, the source electrode of the fourth MOS tube Q4, the second end of the second capacitor and the negative electrode of the input voltage are electrically connected.

Specifically, in this embodiment, the BAT terminal is a battery pack formed by four nominal 3.7V lithium batteries connected in series, the voltage range is 12V to 16.8V, when a power supply device such as a 5V adapter is used to charge a system from a V + terminal, boosting needs to be performed by the converter control module 2 to charge the lithium battery pack, but when an adapter supporting a USB-PD protocol is used, the input voltage can reach 20V through power negotiation, and at this time, the lithium battery pack can be charged by performing voltage reduction through the converter control module 2, so that a person who is input from the V + terminal needs the system to determine whether the converter control module 2 works in a Boost mode or a Buck mode according to the input voltage; when the V + terminal is a powered device, the voltage range of the BAT terminal is 12V to 16.8V, and the output voltages of the V + terminal after negotiation by the USB-PD protocol may be 5V, 9V, 12V, 15V, and 20V, which also require buck-boost conversion.

Taking the direction of charging the lithium battery by inputting the V + terminal as an example, when the input voltage is lower than the voltage of the lithium battery, Q4 is constantly turned off, Q3 is constantly turned on, and Q1 and Q2 are driven by two complementary PWM waves, so that the converter works in a Boost mode: when the input voltage is higher than the lithium battery voltage, Q1 is constantly conducted, Q2 is constantly turned off, two paths of complementary PWM waves are used for driving Q3 and Q4, and at the moment, the converter works in a Buck mode. It will be appreciated that the operating state of the converter when the system is operating as a power supply is similar above, but in the opposite direction.

As a preferred embodiment, the power management module 1 has a chip model EDP3010. In another preferred embodiment, the chip type of the power management module 1 is not particularly limited.

The application also provides a power supply quick-charging control device of the USB PD, which comprises the power supply quick-charging control circuit of the USB PD.

For an introduction of the power supply quick charge control circuit of the USB PD provided in the present application, please refer to the foregoing embodiments, which are not described herein again.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power supply quick charge control circuit of a USB PD is characterized by comprising a power supply management module, a converter control module, an insertion detection module, a lithium battery protection module, an over-temperature detection module and a lithium battery pack;

the power management module is electrically connected with the converter control module, the insertion detection module, the lithium battery protection module, the over-temperature detection module and the lithium battery pack respectively;

2. The power supply fast charging control circuit of a USB PD according to claim 1, characterized in that it further comprises an auxiliary power supply module;

the auxiliary power supply module is electrically connected with the power supply management module and is used for charging the power supply management module.

3. The power supply quick charge control circuit of the USB PD of claim 1, characterized in that the over-temperature detection module includes a thermistor and a first resistor;

4. The power supply quick charge control circuit of the USB PD of claim 1, characterized in that the lithium battery protection module includes a lithium battery protection unit and a first switch control unit;

5. The power supply quick charging control circuit of the USB PD of claim 1, characterized in that the insertion detection module includes a TypeC interface unit, a USB interface unit and a second switch control unit;

6. The power supply quick-charging control circuit of the USB PD according to claim 1, wherein the converter control module includes a first MOS transistor, a second MOS transistor, a third MOS transistor, a fourth MOS transistor, an inductor, a first capacitor, and a second capacitor;

7. The power supply quick-charging control circuit of the USB PD of claim 1, wherein the chip model of the power supply management module is EDP3010.

8. The power supply quick-charging control circuit of the USB PD of claim 4, characterized in that the chip model of the lithium battery protection unit is LT6034A.

9. The power supply fast charging control circuit of the USB PD according to claim 2, wherein the auxiliary power supply module includes a low dropout linear regulator, a third capacitor, a fourth capacitor and a fifth capacitor;

10. A power supply fast charging control device of a USB PD, characterized by comprising the power supply fast charging control circuit of the USB PD according to any one of claims 1 to 9.