CN204407963U - A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring - Google Patents

A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring Download PDF

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Publication number
CN204407963U
CN204407963U CN201520076810.5U CN201520076810U CN204407963U CN 204407963 U CN204407963 U CN 204407963U CN 201520076810 U CN201520076810 U CN 201520076810U CN 204407963 U CN204407963 U CN 204407963U
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China
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chip
protection
monitoring
lithium battery
electric
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CN201520076810.5U
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Chinese (zh)
Inventor
伏涛
毛卫清
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Shanghai Wei'an Electronic Co., Ltd
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Shanghai Changyuan Wayon Circuit Protection Co Ltd
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Abstract

The utility model relates to the lithium battery administration module possessing multifunction protection and electric quantity monitoring, is used in 3 ~ 15 string lithium ions or LiFePO4 rechargeable battery pack protection module, particularly relates to and be used in electric bicycle field.A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring, for power brick, comprise lithium battery administrative protection chip, high temperature protection module, charging short circuit protection module and charge balancing module, described lithium battery administrative protection chip adopts 1 ~ 3 lithium battery administrative protection chip MM3474 and 1 electric quantity of lithium battery chip monitoring BQ34Z100, support 3 ~ 15 joint lithium batteries, on the defencive function basis of MM3474, power consumption chip monitoring BQ34Z100, to battery electric quantity, there is real time monitoring function, in power brick use procedure, by external converting interface, read BQ34Z100 chip data, the battery capacity of Real-Time Monitoring power brick, residual capacity, real-time current and temperature information.

Description

A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring
Technical field
The utility model relates to the lithium battery administration module possessing multifunction protection and electric quantity monitoring, is used in 3 ~ 15 string lithium ions or LiFePO4 rechargeable battery pack protection module, particularly relates to and be used in electric bicycle field.
Technical background
Lithium battery managing chip MM3474 relates to and is used in 3 ~ 5 string (single IC) lithium ions or LiFePO4 rechargeable battery pack protection modules, and supports cascade.Because lithium battery managing chip MM3474 only has over-charge protective, Cross prevention, electric discharge overcurrent protection and discharge short protection; there is no overheat protector, charging short-circuit protection and charge balancing function; functionally be short of integrality; and market is tending towards intelligent; need monitoring to the real-time condition of battery, the function of obvious MM3474 is nowhere near.The art personnel expect, on the basis of MM3474, adds electric quantity monitoring chip BQ34Z100, realize electric quantity monitoring function, adds charge balancing module, high temperature protection module and charging short circuit protection module simultaneously.Make scheme function more perfect, the multiple demand of market PCM baffle function can be adapted to.The high temperature protection module added in addition and charging short circuit protection module, make power brick obtain further safety guarantee in normal use procedure.
Utility model content
The purpose of this utility model is: provide a kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring, can overcome above-mentioned existing technical disadvantages, to increase the market competitiveness.
The utility model specifically realizes in the following manner, a kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring, for power brick, comprise lithium battery administrative protection chip, comprise high temperature protection module, charging short circuit protection module and charge balancing module, described lithium battery administrative protection chip adopts 1 ~ 3 lithium battery administrative protection chip MM3474 and 1 electric quantity of lithium battery chip monitoring BQ34Z100, support 3 ~ 15 joint lithium batteries, on the defencive function basis of MM3474, power consumption chip monitoring BQ34Z100, to battery electric quantity, there is real time monitoring function, in power brick use procedure, by external converting interface, read BQ34Z100 chip data, the battery capacity of Real-Time Monitoring power brick, residual capacity, real-time current and temperature information.
On such scheme basis, described charge balancing module utilizes shunting, the corresponding batteries of each balancing chip, parallel shunt resistance in every batteries, utilizes balancing chip to control the switch of metal-oxide-semiconductor in shunt circuit, when a corresponding batteries reaches equilibrium point in advance in charging process, balancing chip driven MOS pipe is opened, portion of electrical current is flow through by this shunt resistance, to reduce the charging rate of this batteries, reaches portfolio effect.
On such scheme basis; described high temperature protection module adopts can recover temperature detect switch (TDS); described recovered temperature detect switch (TDS) is connected on the charge and discharge control input of battery management chip; when charging or discharge temp reaches preset value; temperature detect switch (TDS) open circuit; the charge and discharge control end no-output of battery management chip, discharge and recharge MOS turns off.
On such scheme basis, described charging short circuit protection module adopts during field effect transistor Qc realizing circuit short circuit and turns off, thus realizes charging short-circuit protection.
Use the utility model to control to export, comprise step:
(1) utilize electric quantity monitoring chip BQ34Z100 characteristic, to battery electric quantity, there is real time monitoring function.In power brick use procedure, can external converting interface be passed through, read BQ34Z100 chip data, thus can the information such as the battery capacity of Real-Time Monitoring power brick, residual capacity, real-time current and temperature;
(2) shunting is utilized, a shunt resistance in parallel in every batteries, balancing chip is utilized to control metal-oxide-semiconductor switch in shunt circuit, when the battery of correspondence reaches equilibrium point in advance in charging process, balancing chip driven MOS pipe is opened, portion of electrical current is flow through by shunt resistance, thus reduces the charging rate of this batteries, reaches portfolio effect;
(3) characteristic can recovering temperature detect switch (TDS) is utilized, the charge and discharge control input of temperature detect switch (TDS) string at battery management chip can be recovered, when charging or discharge temp reaches preset value, temperature detect switch (TDS) open circuit, the charge and discharge control end open circuit of battery management chip, discharge and recharge MOS turns off, thus realizes high temperature protection function;
(4) utilize the characteristic of circuit during short circuit, additional driving triode, utilizes the switching function of triode, and the field effect transistor Qc that will charge realizes turning off, thus realizes charging short-circuit protection.
Lithium ion or the LiFePO4 rechargeable battery pack protection module with said method control all are realized by the mode of hardware, have very high stability! For design battery pack PACK circuit provides changeability, improve the ability of reply market diversification demand.Provide a kind of safer, economic, convenient, efficient lithium ion or LiFePO4 rechargeable battery pack protection module, impel product safer, more reliable in operation.Program cost is low in addition, multiple functional, and the market competitiveness is strong.
Accompanying drawing explanation
Fig. 1 is the integrated circuit block diagram of the utility model protection module;
Fig. 2 is electric quantity monitoring circuit module;
Fig. 3 is charge balancing modular circuit block diagram;
Fig. 4 is high-temperature protection circuit module;
Fig. 5 is charging short-circuit protection circuit module;
Fig. 6 is the utility model circuit theory diagrams cases;
Number in the figure illustrates:
1---high temperature protection module; 2---charging short circuit protection module;
3---charge balancing module;
4---battery pack;
5---electric quantity monitoring chip;
6---charger; 7---load;
iC1, IC2---lithium battery managing chip MM3474.
Specific embodiments
Consult the integrated circuit block diagram that Fig. 1 is the utility model protection module:
A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring; for power brick; comprise lithium battery administrative protection chip, high temperature protection module 1, charging short circuit protection module 2 and charge balancing module 3, described lithium battery administrative protection chip adopts 2 lithium battery administrative protection chip MM3474 iC1, IC2with 1 BQ34Z100 electric quantity of lithium battery chip monitoring 5; support 3 ~ 15 joint lithium batteries; on the defencive function basis of MM3474; with BQ34Z100 electric quantity monitoring chip 5; to battery pack 4 electricity, there is real time monitoring function, in power brick use procedure, by external converting interface; read BQ34Z100 chip data, the battery capacity of Real-Time Monitoring power brick, residual capacity, real-time current and temperature information.
Consulting Fig. 2 is electric quantity monitoring circuit module: utilize the function that BQ34Z100 electric quantity monitoring chip 5 pairs of battery electric quantities can be monitored, by the loop of its input end parallel connection at precision resistance two ends, utilize the monitoring to precision resistance real-time current, thus monitor whole circuital current state.The capacity of battery pack is monitored additionally by measurement battery pack 4 voltage.Whole observation process information exports by information output of BQ34Z100.
Consulting Fig. 3 is charge balancing modular circuit block diagram: utilize shunting, the corresponding batteries of each MM3513 balancing chip, when MM3513 balancing chip detects its corresponding batteries voltage time, MM3513 balancing chip drives balanced metal-oxide-semiconductor to open, allow part charging current flow to next joint by corresponding shunt resistance, thus slow down this batteries charging rate.
Consulting Fig. 4 is high-temperature protection circuit module: utilize the switching characteristic can recovering temperature detect switch (TDS) to go to control charge and discharge control input; when temperature detect switch (TDS) can be recovered reach preset temperature; this can recover temperature detect switch (TDS) and disconnect; the open circuit of charge and discharge control input; thus cause discharge and recharge output no-output; discharge and recharge field effect transistor Qc, Qd turn off, and battery pack stops discharge and recharge.When temperature return is to relevant temperature, can recover temperature detect switch (TDS) and close, discharge and recharge field effect transistor Qc, Qd reopen, battery pack regular picture.
Consult Fig. 5 for charging short-circuit protection circuit module: the switching characteristic utilizing transistor; when charging short circuit; charger negative terminal voltage raises; signals collecting part gathers voltage signal to charging short circuit protection module; transistor conducting; charging is controlled metal-oxide-semiconductor Qc grid voltage and draw ground, metal-oxide-semiconductor turns off, charge cutoff.
Fig. 6 is the utility model circuit theory diagrams cases, to further illustrate practicality of the present utility model.

Claims (4)

1. one kind possesses the lithium battery administration module of multifunction protection and electric quantity monitoring, for power brick, comprise lithium battery administrative protection chip, it is characterized in that: also comprise high temperature protection module, charging short circuit protection module and charge balancing module, described lithium battery administrative protection chip adopts 1 ~ 3 lithium battery administrative protection chip MM3474 and 1 electric quantity of lithium battery chip monitoring BQ34Z100, support 3 ~ 15 joint lithium batteries, on the defencive function basis of MM3474, power consumption chip monitoring BQ34Z100, to battery electric quantity, there is real time monitoring function, in power brick use procedure, by external converting interface, read BQ34Z100 chip data, the battery capacity of Real-Time Monitoring power brick, residual capacity, real-time current and temperature information.
2. a kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring according to claim 1; it is characterized in that: described charge balancing module utilizes shunting; the corresponding batteries of each balancing chip; parallel shunt resistance in every batteries; balancing chip is utilized to control the switch of metal-oxide-semiconductor in shunt circuit; when a corresponding batteries reaches equilibrium point in advance in charging process; balancing chip driven MOS pipe is opened; portion of electrical current is flow through by this shunt resistance; to reduce the charging rate of this batteries, reach portfolio effect.
3. a kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring according to claim 1; it is characterized in that: described high temperature protection module adopts can recover temperature detect switch (TDS); described recovered temperature detect switch (TDS) is connected on the charge and discharge control input of battery management chip; when charging or discharge temp reaches preset value; temperature detect switch (TDS) open circuit; the charge and discharge control end no-output of battery management chip, discharge and recharge MOS turns off.
4. a kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring according to claim 1, is characterized in that: described charging short circuit protection module adopts during field effect transistor Qc realizing circuit short circuit and turns off, thus realizes charging short-circuit protection.
CN201520076810.5U 2015-02-04 2015-02-04 A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring Active CN204407963U (en)

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Application Number Priority Date Filing Date Title
CN201520076810.5U CN204407963U (en) 2015-02-04 2015-02-04 A kind of lithium battery administration module possessing multifunction protection and electric quantity monitoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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CN204407963U true CN204407963U (en) 2015-06-17

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105938200A (en) * 2016-04-12 2016-09-14 西藏舟航物联科技有限公司 Positioning device with characteristic of self-power supply realization
CN107733046A (en) * 2017-11-21 2018-02-23 深圳市森树强电子科技有限公司 A kind of lithium battery intelligent charging management method and device
CN109347154A (en) * 2018-09-19 2019-02-15 莱克电气股份有限公司 Charging and discharging lithium battery drives protection system
CN110456280A (en) * 2019-08-16 2019-11-15 罗宜恒 A kind of battery uses online data monitoring device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105938200A (en) * 2016-04-12 2016-09-14 西藏舟航物联科技有限公司 Positioning device with characteristic of self-power supply realization
CN105938200B (en) * 2016-04-12 2018-03-23 江苏舟航物联网技术有限公司 Self-powered locator can be achieved in one kind
CN107733046A (en) * 2017-11-21 2018-02-23 深圳市森树强电子科技有限公司 A kind of lithium battery intelligent charging management method and device
CN109347154A (en) * 2018-09-19 2019-02-15 莱克电气股份有限公司 Charging and discharging lithium battery drives protection system
CN110456280A (en) * 2019-08-16 2019-11-15 罗宜恒 A kind of battery uses online data monitoring device and method

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C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 200083 806, floor 8, No. 125, Liuying Road, Hongkou District, Shanghai

Patentee after: Shanghai Wei'an Electronic Co., Ltd

Address before: Seven road 201202 Shanghai Pudong New Area Shiwan No. 1001

Patentee before: Shanghai Changyuan Wayon Circuit Protection Co.,Ltd.