CN209389733U - Lithium battery protection board - Google Patents

Lithium battery protection board Download PDF

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Publication number
CN209389733U
CN209389733U CN201822016123.0U CN201822016123U CN209389733U CN 209389733 U CN209389733 U CN 209389733U CN 201822016123 U CN201822016123 U CN 201822016123U CN 209389733 U CN209389733 U CN 209389733U
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China
Prior art keywords
module
battery pack
main control
connect
control module
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CN201822016123.0U
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Inventor
尤新安
郑灵浪
高志飞
谢浩
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Ningbo Gexin New Energy Technology Co Ltd
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Ningbo Gexin New Energy Technology Co Ltd
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Abstract

The utility model is suitable for technical field of lithium batteries, provides a kind of lithium battery protection board, which includes battery pack, analog front-end module, main control module, wake-up module, charge-discharge modules, light-coupled isolation module and protective module;Battery pack is connect with analog front-end module;Analog front-end module is connect by control bus and data/address bus with main control module;Wake-up module, charge-discharge modules, protective module are connect with battery pack and main control module respectively;When wake-up module is for detecting that charger or load are connected to lithium battery protection board, wake-up signal is sent to main control module;Main control module is used to send a control signal to charge-discharge modules according to whether get wake-up signal, so that charge-discharge modules control lithium battery protection board stops working or carried out charging to battery pack by charger or discharged by battery pack load.Lithium battery protection board provided by the utility model solves the problems, such as that existing lithium battery protection board safety is inadequate.

Description

Lithium battery protection board
Technical field
The utility model belongs to technical field of lithium batteries more particularly to a kind of lithium battery protection board.
Background technique
With the progress of science and technology and the development of electronic technology, more and more electronic equipments need to be carried out using battery Power supply uses, and existing battery includes lithium battery, lead-acid battery etc., and wherein lithium battery has energy density compared to traditional lead acid batteries Greatly, service life length, more environmentally friendly advantage, therefore be widely used.
Existing lithium battery group generallys use hardware lithium battery protection board and protects to it, lithium battery protection board for pair Serial lithium battery group carries out charge and discharge protecting, so that protecting lithium battery group not over-discharge, not overcharging, not overcurrent and output short-circuit Protection guarantees that the voltage differences between each single battery are less than setting value when lithium battery is fully charged, realizes that battery pack is each Single battery fills.
However in existing lithium battery protection board, lithium battery group is in instantaneous operating conditions, when lithium battery protection board not When connecting charger and load, lithium battery group is not turned off power circuit, there is also voltage output, leads to its safety not It is enough, or even cause safety accident, simultaneously because lithium battery group real-time perfoming voltage output to increase energy consumption.
Utility model content
The utility model embodiment provides a kind of lithium battery protection board, it is intended to solve existing lithium battery protection board safety not Enough problems.
The utility model embodiment proposes a kind of lithium battery protection board, including battery pack, analog front-end module, master control mould Block, wake-up module, charge-discharge modules, light-coupled isolation module and protective module;
The battery pack is connect with the analog front-end module;
The analog front-end module is connected to the main control module by control bus and data/address bus;
The wake-up module, the charge-discharge modules, the protective module respectively with the battery pack and the master control Module connection;
The analog front-end module is used to detect electric current, voltage and the temperature for acquiring the battery pack, and is used for basis The control of the main control module realizes current balance control to the inside of the battery pack;
When the wake-up module is for detecting that charger or load are connected to the lithium battery protection board, sends and wake up letter Number to the main control module;
The main control module is used to send a control signal to the charge and discharge mould according to whether get the wake-up signal Block so that the charge-discharge modules control the lithium battery protection board stop working or by the charger to the battery pack into Row charging discharges to the load by the battery pack;
The light-coupled isolation module is connect with the PORT COM of the main control module, is communicated for eliminating with host computer When signal interference;
The short-circuit protection when protective module charges to the battery pack for the charger.
Further, the analog front-end module includes current detection circuit, voltage detecting circuit, Balance route electricity Road and temperature collection circuit;
The current detection circuit is for detecting the electric current for acquiring the battery pack;
The voltage detecting circuit is for detecting the voltage for acquiring the battery pack;
The temperature collection circuit is for detecting the temperature for acquiring the battery pack;
The balancing control circuit is used to realize electric current to the inside of the battery pack according to the control of the main control module Balance route.
Further, the lithium battery protection board further includes the memory module and instruction being connected to the main control module Lamp;
The memory module is used to store the status information of the battery pack;
The indicator light is used to indicate the state of charge of the battery pack.
Further, the charge-discharge modules include the charging metal-oxide-semiconductor connecting with main control module and electric discharge metal-oxide-semiconductor, institute The grid of the grid and the electric discharge metal-oxide-semiconductor of stating charging metal-oxide-semiconductor is connected to the main control module, the source of the charging metal-oxide-semiconductor Pole is connect with the negative input end of the charger, and the drain electrode of the charging MOS pipe is connect with the drain electrode of the electric discharge metal-oxide-semiconductor, institute The source electrode for stating electric discharge metal-oxide-semiconductor is connect with the cathode of the battery pack.
Further, the wake-up module includes the first resistor being connected to the main control module, the first triode, and Two resistance, the second triode, the first diode and 3rd resistor being connect with first triode, with second triode The 4th resistance, the 5th resistance and the second diode of connection, and the 6th resistance and the 7th resistance that are connect with the 3rd resistor;
The main control module and described first resistor one end, the collector of first triode, second triode Collector and the connection of described second resistance one end, first resistor other end ground connection, the emitter of first triode Ground connection, the base stage of first triode connect with the cathode of the first diode and described 3rd resistor one end, and described the The emitter of two triodes is connect with the anode of second diode and described 5th resistance one end, second triode Base stage is connect with described 4th resistance one end, and the second resistance other end is connect with the anode of the battery pack, and described first The plus earth of diode, the cathode ground connection of second diode, the 4th resistance other end ground connection, the 3rd resistor The other end is connect with the 6th resistance and described 7th resistance one end, the 5th resistance and the 6th resistance other end with The connection of one common end, the 7th resistance other end ground connection, the common end are the negative input end of the charger and described negative The public connecting end of the negative output terminal of load.
Further, the protective module includes a protection metal-oxide-semiconductor, the grid of the protection metal-oxide-semiconductor and the master control The anode of module connection, source electrode and the battery pack of the protection metal-oxide-semiconductor is connect, the drain electrode for protecting metal-oxide-semiconductor with it is described The positive input terminal of charger connects.
Lithium battery protection board provided by the utility model, since setting charge-discharge modules allow to carry out battery pack The control of charge or discharge, since setting wake-up module may make its lithium battery protection board that ought not connect with charger and load When, battery power circuit is closed, voltage output is stopped;When being connected with any charger or load, main control module control Battery pack is restored to working condition, single carried out charging to realize to battery pack by charger or single is put by battery pack to load Electricity;Since signal is dry when setting light-coupled isolation module communicates the PORT COM that can eliminate main control module with host computer It disturbs, since setting protective module to realize short-circuit protection when charging to battery pack, so that increasing li-ion cell protection The security performance of plate reduces the energy consumption of lithium battery protection board, solves the problems, such as that existing lithium battery protection board safety is inadequate.
Detailed description of the invention
Fig. 1 is the module map for the lithium battery protection board that an embodiment of the utility model provides;
Fig. 2 is the structure chart for the lithium battery protection board that a preferred embodiment of the utility model provides;
Fig. 3 is the circuit that connect with wake-up module in lithium battery protection board that a preferred embodiment of the utility model provides Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.
Lithium battery protection board provided by the utility model includes battery pack, analog front-end module, main control module, wakes up mould Block, charge-discharge modules, light-coupled isolation module and protective module, battery pack are connect with analog front-end module, analog front-end module with Main control module connection, wake-up module, charge-discharge modules, protective module connect with battery pack and main control module respectively, optocoupler every It is connected from the PORT COM of module and main control module, when wake-up module detects that charger or load are connected to lithium battery protection board When, wake-up module sends wake-up signal to main control module;When main control module does not receive wake-up signal, control signal control is sent Close lithium battery protection board power circuit;When main control module receives wake-up signal, control signal is sent so that charge-discharge modules Control carries out charging or by battery pack to load discharge to battery pack by charger, so that improving Product Safety, stability, together When reduce lithium battery protection board energy consumption, while analog front-end module can detecte acquisition battery pack electric current, voltage and temperature Degree, and current balance control is realized to the inside of battery pack according to the control of main control module, light-coupled isolation module can isolate The signal interference when PORT COM and host computer of main control module communicate, it is short when protective module may be implemented to charge to charger Road protection.
Embodiment one
It is as shown in Figure 1 the module map of lithium battery protection board provided by the embodiment of the utility model.
Lithium battery protection board provided by the utility model, including battery pack 20, analog front-end module 30, main control module 40, Wake-up module 50, charge-discharge modules 60, light-coupled isolation module 70 and protective module 80;Wherein, battery pack 20 and AFE(analog front end) mould Block 30 connects;Analog front-end module 30 is connect by control bus and data/address bus with main control module 40;Wake-up module 50, charge and discharge Electric module 60, protective module 80 are connect with battery pack 20 and main control module 40 respectively;Wherein analog front-end module 30 is for examining Electric current, voltage and the temperature of acquisition battery pack 20 are surveyed, and for the control according to main control module 40 in battery pack 20 Realize current balance control in portion;When wake-up module 50 is for detecting that charger or load are connected to lithium battery protection board, send Wake-up signal is to main control module 40;Main control module 40 is used to send a control signal to charge and discharge according to whether get wake-up signal Electric module 60, so that charge-discharge modules 60 control lithium battery protection board and stop working or charged by charger to battery pack 20 Or it is discharged by 20 pairs of loads of battery pack;Light-coupled isolation module 70 is connect with the PORT COM of main control module, for eliminate with Signal interference when host computer is communicated;Short circuit when protective module 80 charges to battery pack 20 for charger is protected Shield.
Lithium battery protection board provided by the embodiment of the utility model is allowed to by the charge-discharge modules of setting to battery Group carry out charge or discharge control, by be arranged wake-up module may make its lithium battery protection board ought not with charger and bear When carrying connection, battery power circuit is closed, stops voltage output;When being connected with any charger or load, master control mould Block control battery pack is restored to working condition, charge to battery pack by charger to realize or be put by battery pack to load Electricity;Signal is dry when by the way that light-coupled isolation module is arranged the PORT COM that can eliminate main control module being communicated with host computer It disturbs, to realize short-circuit protection when charging to battery pack by the way that protective module is arranged, so that increasing li-ion cell protection The security performance of plate reduces the energy consumption of lithium battery protection board, solves the problems, such as that existing lithium battery protection board safety is inadequate.
Embodiment two
The structure chart of the lithium battery protection board of the preferred embodiment in the utility model offer is provided.Its realization principle And the technical effect and embodiment one generated is identical, to briefly describe, the utility model embodiment does not refer to place, can refer to reality Apply corresponding contents in example one.
Difference from the first embodiment is that specifically, lithium battery protection board further includes depositing with what main control module 40 was connect Store up module 90 and indicator light 100.
Specifically, analog front-end module 30 includes current detection circuit, voltage detecting circuit, balancing control circuit and temperature Spend Acquisition Circuit;
Wherein, current detection circuit is used to detect the electric current of acquisition battery pack 20;
Voltage detecting circuit is for detecting the voltage for acquiring the battery pack 20;
Temperature collection circuit is for detecting the temperature for acquiring the battery pack 20;
Balancing control circuit is used to realize current balance control to the inside of battery pack 20 according to the control of main control module 40.
Wherein, in one embodiment of the utility model, the positive B+ of the battery pack 20 is just defeated with charger respectively Enter to hold C+ to connect with the positive output end P- of load, the negative input end C- of charger is connected with the negative output terminal P- of load, lithium Battery protecting plate is that charge and discharge are arranged with mouth, and positive B+, the cathode of battery pack 20 are just defeated with analog front-end module 30 respectively Enter end, negative input end connection.
In one embodiment of the utility model, which uses BQ76940 chip, AFE(analog front end) Module 30 can provide the functions such as overcurrent protection, power supply pressure stabilizing, battery balanced control, cell voltage conversion, temperature detection, before simulation End module includes current detection circuit, voltage detecting circuit, balancing control circuit and temperature collection circuit, the electric current of detection, Voltage and temperature signal etc. are transmitted in main control module 40 one by one by specific data PORT COM, and main control module 40 is to each Kind signal obtains the information such as the current value, voltage value and temperature value of battery pack 20, main control module 40 after carrying out AD analog-to-digital conversion Corresponding control signal is issued to analog front-end module 30, so that AFE(analog front end) by control bus according to each information of acquisition Module 30 controls internal metal-oxide-semiconductor and opens, and is discharged by two resistance single-unit battery core, completes passive equilibrium, realizes to electricity The Balance route of pond group 20, so that 20 internal balance electric current of battery pack, guarantees the consistency of 20 voltage of battery pack.And work as master control Module 40 according to when 20 charge and discharge of battery pack for getting the detection of analog front-end module 30 there are when overcurrent, over-voltage, high/low temperature, Analog front-end module 30 is sent a control signal to, so that analog front-end module 30 controls battery pack 20 and realizes charge and discharge overcurrent, mistake The protection of pressure, high/low temperature.
In one embodiment of the utility model, main control module 40 is MCU chip, specific to use in the present embodiment ATMEGA32M1 chip.Wherein, main control module 40 provides 1 road UART, 1 road CAN, 1 road SPI and 1 road lin communication function, Be connected by PORT COM with host computer, can be used for the data monitoring of host computer, show current battery 20 total voltage and Each monomer battery voltage, charging and discharging currents, 20 remaining capacity of battery pack, the working condition and event that temperature and battery pack 20 are now located Messages such as barrier etc..Wherein user can be communicated by the PORT COM of host computer and main control module 40, so that program can be used Programming mode carries out flexible modulation setting to all protection voltages, protective current, the threshold value for protecting temperature and defencive function etc., Its main control module 40 controls analog front-end module 30 according to programming data, to realize the setting of all information.Wherein, originally In embodiment, the PORT COM of main control module 40 connects a light-coupled isolation module 70, is made by the setting of light-coupled isolation module 70 The signal interference when PORT COM that can eliminate main control module 40 and host computer communication is obtained, to achieve the effect that isolation scene. Wherein in the present embodiment, which is also connected with a memory module 90, and main control module 40 can be obtained in charge and discharge All status informations such as voltage, electric current, charging times, the electricity of the battery pack 20 taken are automatically stored into memory module 90, Memory module 90 is used for the status information of storage battery group 20, can store the status information of preceding 200 charge and discharge, host computer is such as PC etc. can carry out reading data by the port UART when carrying out data statistics, be convenient for user's gather data and Fault analytical.Its Middle main control module 40 is also connected with an indicator light 100, and in the present embodiment, indicator light 100 is that 4 road SOC red all the way, that three tunnels are green refer to Show lamp 100, display of the main control module 40 according to the power state information control instructions lamp 100 of the battery pack 20 of acquisition, instruction Lamp 100 is used to indicate the state of charge of battery pack 20 and passes through the instruction of indicator light 100 when battery pack 20 carries out charge and discharge The state of charge of battery pack 20 can be obtained convenient for user.
Wherein, main control module 40 is also connect with wake-up module 50, charge-discharge modules 60 and protective module 80 respectively, wherein Wake-up module 50 can detect whether lithium battery protection board connects with charger or load, be connected to when detecting charger or loading When lithium battery protection board, wake-up signal is sent to main control module 40;When wake-up signal has not been obtained in its main control module 40, send Signal is controlled to charge-discharge modules 60, so that charge-discharge modules 60 control lithium battery protection board and stop working, so that lithium can be reduced The energy consumption of battery protecting plate.When its main control module 40 gets wake-up signal, charge-discharge modules 60 are sent a control signal to, so that It is single by charger to battery pack 20 carry out charging or it is single discharged by 20 pairs of loads of battery pack so that raising product safety Property, stability.Wherein charge-discharge modules 60 are connect with main control module 40, the control signal control issued according to main control module 40 The charging and discharging state of battery pack 20 processed.Wherein protective module 80 is connect with main control module 40, when charger carries out battery pack 20 When short circuit occurs for charging, control signal is issued to main control module 40, main control module 40 is filled according to the control of the control signal of acquisition Discharge module 60 is so that battery pack 20 stops charging, realization short-circuit protection.
Further, as shown in figure 3, in one embodiment of the utility model, wake-up module 50 includes and master control mould The first resistor R1 that block 40 connects, the first triode Q1, second resistance R2, the second triode Q2 are connect with the first triode Q1 First diode D1 and 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the two or two being connect with the second triode Q2 Pole pipe D2, and the 6th resistance R6 and the 7th resistance R7 that are connect with 3rd resistor R3;
The collector of main control module 40 and the one end first resistor R1, the collector c of the first triode Q1, the second triode Q2 C, and the connection of the one end second resistance R2, the emitter e of first resistor R1 other end ground connection, the first triode Q1 are grounded, and the one or three The base stage b of pole pipe Q1 is connect with the cathode of first diode D1 and the one end 3rd resistor R3, the emitter e of the second triode Q2 with The anode of second diode D2 is connected with the 5th one end resistance R5, and the base stage b of the second triode Q2 and the 4th one end resistance R4 connect It connects, the second resistance R2 other end is connect with the positive B+ of battery pack 20, the plus earth of first diode D1, the second diode D2 Cathode ground connection, the 4th resistance R4 other end ground connection, the 3rd resistor R3 other end and the 6th resistance R6 and the 7th one end resistance R7 Connection, the 5th resistance R5 and the 6th resistance R6 other end are connect with a common end, the 7th resistance R7 other end ground connection, wherein public The public connecting end for the negative input end C- of charger and the negative output terminal P- of load is held, in the present embodiment, lithium battery is protected The same mouth of the charge and discharge of backplate, the negative input end C- of charger and the negative output terminal P- of load are designed as omnibus circuit channel.
The main control module 40 is used to receive the wake-up signal of the transmission of wake-up module 50, and wherein the wake-up signal has for failing edge Effect, and the low level time is greater than 20ms, is used to eliminate Hz noise.Wherein in the not connected load of the lithium battery protection board and When charger, main control module 40 controls charge-discharge modules 60 and is in close state, and lithium battery protection board is in sleep shape at this time State, i.e. battery pack 20 close power supply, Non voltage output, therefore common end is not driven by voltage.
When common end is connected with load, that is, resistance is connected between the negative output terminal P- of the positive output end P+ loaded and load When, since the positive output end P+ of load is connect with the positive B+ of battery pack 20, the voltage of common end is changed into high level, The level of the base stage b of its first triode Q1 is high level at this time, so that its first triode Q1 is connected, so that the first triode The collector c level of Q1 switchs to low level, the low pulse of failing edge is generated, so that main control module 40 receives wake-up module 50 Wake-up signal, main control module 40 sends a control signal to charge-discharge modules 60 at this time so that charge-discharge modules 60 control by electricity Group 20 pairs of loads in pond are discharged.
When common end is connect with charger, i.e. between the positive output end C+ of charger and the negative output terminal C- of charger It is connected with voltage, and the negative output terminal C- offer of charger is negative voltage, at this time the electricity of the emitter e of the second triode Q2 Pressure is negative, so that its second triode Q2 is connected, so that the collector c level of the second triode Q2 switchs to low level, under generation Drop is along low pulse, so that main control module 40 receives the wake-up signal of wake-up module 50, main control module 40 sends control at this time Signal processed is to charge-discharge modules 60, so that the control of charge-discharge modules 60 charges to battery pack 20 by charger.
Further, charge-discharge modules 60 include the charging metal-oxide-semiconductor Q3 being connect with main control module 40 and electric discharge metal-oxide-semiconductor Q4, Wherein the grid g of the grid g of charging metal-oxide-semiconductor Q3 and the metal-oxide-semiconductor Q4 that discharges are connect with main control module 40, the source for the metal-oxide-semiconductor Q3 that charges The drain electrode d of the negative input end C- connection of pole s and charger, the metal-oxide-semiconductor Q3 that charges is connect with the drain electrode d of electric discharge metal-oxide-semiconductor Q4, is discharged The source electrode s of metal-oxide-semiconductor Q4 is connect with the cathode B- of battery pack 20.Wherein, when common end is connected with load, charge-discharge modules 60, which receive main control module 40, sends control signal, and the electric discharge MOS pipe Q4 work of the control of charge-discharge modules 60 at this time, charge metal-oxide-semiconductor Q3 close, at this time lithium-cell plate can only carry out it is single by battery pack 20 to load discharge;When common end is connected with charger When, charge-discharge modules 60 receive main control module 40 and send control signal, the charging metal-oxide-semiconductor of the control of charge-discharge modules 60 at this time Q3 work, electric discharge metal-oxide-semiconductor Q4 close, at this time lithium-cell plate can only carry out it is single charged by charger to battery pack 20, therefore Single charge or discharge operation can only be carried out by controlling lithium battery protection board by main control module 40, so that reducing product safety Accident improves the safety of product, stability, and reduces the energy consumption of battery pack 20.
Further, protective module 80 includes a protection metal-oxide-semiconductor Q5, and the grid g of metal-oxide-semiconductor Q5 and main control module 40 is protected to connect It connects, the source electrode s of protection metal-oxide-semiconductor Q5 connect with the positive B+ of battery pack 20, protects the just defeated of d and charger that drain of metal-oxide-semiconductor Q5 Enter P+ is held to connect, detects short-circuit protection when charger charging can be achieved according to the on-off of protection metal-oxide-semiconductor Q5 at this time.Work as charging When short circuit when, main control module 40 receive protection metal-oxide-semiconductor Q5 send signal, main control module 40 issue control signal extremely Charge-discharge modules 60, so that charge-discharge modules 60 stop working, to stop charging.
Lithium battery protection board provided by the embodiment of the utility model is allowed to by the charge-discharge modules of setting to battery Group carries out the control of charge or discharge, makes to realize overcurrent to battery by the main control module and analog front-end module of setting Protection, short-circuit protection and Balance route etc., by be arranged wake-up module may make its lithium battery protection board ought not with charger When with load connection, battery power circuit is closed, voltage output is stopped;When being connected with any charger or load, Main control module control battery pack restore to working condition, with realize it is single by charger to battery pack carry out charging or it is single by electricity Pond group is to load discharge, so that increasing the security performance of lithium battery protection board, to disappear by the way that light-coupled isolation module is arranged Signal interference when being communicated except the PORT COM of main control module with host computer to realize to battery by the way that protective module is arranged Short-circuit protection when group is charged reduces lithium battery protection board so that increasing the security performance of lithium battery protection board Energy consumption, each status information when lithium battery protection board charge and discharge can be stored by the memory module of setting, and can pass through communication Port transmission can be convenient for host computer, data acquisition, Fault analytical when realizing to charge and discharge etc. by the indicator light of setting User obtains the state of charge of battery pack, solves the problems, such as that existing lithium battery protection board safety is inadequate.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (6)

1. a kind of lithium battery protection board, which is characterized in that including battery pack, analog front-end module, main control module, wake-up module, Charge-discharge modules, light-coupled isolation module and protective module;
The battery pack is connect with the analog front-end module;
The analog front-end module is connected to the main control module by control bus and data/address bus;
The wake-up module, the charge-discharge modules, the protective module respectively with the battery pack and the main control module Connection;
The analog front-end module is used to detect electric current, voltage and the temperature for acquiring the battery pack, and for according to The control of main control module realizes current balance control to the inside of the battery pack;
When the wake-up module is for detecting that charger or load are connected to the lithium battery protection board, wake-up signal is sent extremely The main control module;
The main control module is used to send a control signal to the charge-discharge modules according to whether get the wake-up signal, So that the charge-discharge modules control the lithium battery protection board and stop working or carried out by the charger to the battery pack Charging discharges to the load by the battery pack;
The light-coupled isolation module is connect with the PORT COM of the main control module, when being communicated for eliminating with host computer Signal interference;
The short-circuit protection when protective module charges to the battery pack for the charger.
2. lithium battery protection board as described in claim 1, which is characterized in that the analog front-end module includes current detecting electricity Road, voltage detecting circuit, balancing control circuit and temperature collection circuit;
The current detection circuit is for detecting the electric current for acquiring the battery pack;
The voltage detecting circuit is for detecting the voltage for acquiring the battery pack;
The temperature collection circuit is for detecting the temperature for acquiring the battery pack;
The balancing control circuit is used to realize current balance to the inside of the battery pack according to the control of the main control module Control.
3. lithium battery protection board as claimed in claim 1 or 2, which is characterized in that the lithium battery protection board further includes and institute State the memory module and indicator light of main control module connection;
The memory module is used to store the status information of the battery pack;
The indicator light is used to indicate the state of charge of the battery pack.
4. lithium battery protection board as claimed in claim 3, which is characterized in that the charge-discharge modules include connecting with main control module The grid of the charging metal-oxide-semiconductor that connects and electric discharge metal-oxide-semiconductor, the grid of the charging metal-oxide-semiconductor and the electric discharge metal-oxide-semiconductor with the master control Module connection, it is described charging metal-oxide-semiconductor source electrode connect with the negative input end of the charger, it is described charge metal-oxide-semiconductor drain electrode and The source electrode of the drain electrode connection of the electric discharge metal-oxide-semiconductor, the electric discharge metal-oxide-semiconductor is connect with the cathode of the battery pack.
5. lithium battery protection board as claimed in claim 3, which is characterized in that the wake-up module includes and the main control module The first resistor of connection, the first triode, second resistance, the second triode, the one or two pole being connect with first triode Pipe and 3rd resistor, the 4th resistance, the 5th resistance and the second diode being connect with second triode, and with the third The 6th resistance and the 7th resistance of resistance connection;
The main control module and described first resistor one end, the collector of first triode, second triode collection Electrode and the connection of described second resistance one end, the first resistor other end ground connection, the emitter of first triode connect The base stage on ground, first triode is connect with the cathode of the first diode and described 3rd resistor one end, and described second The emitter of triode is connect with the anode of second diode and described 5th resistance one end, the base of second triode Pole is connect with described 4th resistance one end, and the second resistance other end is connect with the anode of the battery pack, and the described 1st The plus earth of pole pipe, the cathode ground connection of second diode, the 4th resistance other end ground connection, the 3rd resistor are another One end is connect with the 6th resistance and described 7th resistance one end, the 5th resistance and the 6th resistance other end and one Common end connection, the 7th resistance other end ground connection, negative input end and the load of the common end for the charger Negative output terminal public connecting end.
6. lithium battery protection board as claimed in claim 3, which is characterized in that the protective module includes a protection metal-oxide-semiconductor, institute The grid for stating protection metal-oxide-semiconductor is connected to the main control module, and the source electrode of the protection metal-oxide-semiconductor and the anode of the battery pack connect It connects, the drain electrode of the protection metal-oxide-semiconductor is connect with the positive input terminal of the charger.
CN201822016123.0U 2018-12-03 2018-12-03 Lithium battery protection board Active CN209389733U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112928794A (en) * 2021-02-02 2021-06-08 邵琪 Lithium battery management system and control method thereof
CN113341324A (en) * 2021-06-24 2021-09-03 惠州亿纬创能电池有限公司 Battery electric quantity detection circuit and electric vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112928794A (en) * 2021-02-02 2021-06-08 邵琪 Lithium battery management system and control method thereof
CN113341324A (en) * 2021-06-24 2021-09-03 惠州亿纬创能电池有限公司 Battery electric quantity detection circuit and electric vehicle

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