CN202190065U - Battery protective circuit - Google Patents

Battery protective circuit Download PDF

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Publication number
CN202190065U
CN202190065U CN 201120281583 CN201120281583U CN202190065U CN 202190065 U CN202190065 U CN 202190065U CN 201120281583 CN201120281583 CN 201120281583 CN 201120281583 U CN201120281583 U CN 201120281583U CN 202190065 U CN202190065 U CN 202190065U
Authority
CN
China
Prior art keywords
battery
switching tube
positive
protecting circuit
negative
Prior art date
Application number
CN 201120281583
Other languages
Chinese (zh)
Inventor
蒋野
衣守忠
涂继军
张鹏
Original Assignee
深圳市雄韬电源科技股份有限公司
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Filing date
Publication date
Application filed by 深圳市雄韬电源科技股份有限公司 filed Critical 深圳市雄韬电源科技股份有限公司
Priority to CN 201120281583 priority Critical patent/CN202190065U/en
Application granted granted Critical
Publication of CN202190065U publication Critical patent/CN202190065U/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0026Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially using safety or protection circuits, e.g. overcharge/discharge disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014Circuits for equalisation of charge between batteries
    • H02J7/0016Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits

Abstract

The utility model is applicable to the field of batteries, and particularly relates to a battery protective circuit. In the embodiment of the utility model, the battery protective circuit can conduct overcharge protection, overdischarge protection and short circuit protection on a plurality of batteries connected in series, enables electric quantity of each battery to be balanced, has the advantages of being low in cost, convenient to install and maintain, high in reliability and the like, and is beneficial to standardization of lithium battery modules.

Description

A kind of battery protecting circuit

Technical field

The utility model belongs to field of batteries, relates in particular to a kind of battery protecting circuit.

Background technology

At present, along with developing rapidly of electronic technology, the application of various electric tools is extensive day by day.The power of above-mentioned electric tool adopts the lithium battery multi-section serial more; The appearance of lithium battery has changed the World Battery system; The new forms of energy product that thereupon arises at the historic moment will bring great variety to human society in future, and lithium battery has stronger advantage as the newcomer of battery family, but still there is the cell otherness in it; Significantly reduce useful life when causing the series connection high voltage applications; Security performance descends, and four joints and the lithium battery series connection below four joints in the market had comparatively ripe integrated chip that it is carried out effective charge and discharge protecting, and then mostly for the above series connection of four joints is to protect through the peripheral circuit of complicacy.

The conventional battery protective circuit has shortcomings such as cost height, installation and maintenance inconvenience and reliability are low, is unfavorable for the lithium battery modularization standardization.

The utility model content

The purpose of the utility model is to provide a kind of battery protecting circuit, is intended to solve shortcomings such as the conventional battery protective circuit exists that cost is high, installation and maintenance are inconvenient and reliability is low, is unfavorable for the problem of lithium battery modularization standardization.

The utility model is achieved in that a kind of battery protecting circuit, is used to protect the multiple batteries of series connection, and said battery protecting circuit comprises:

Several monitoring units, the single battery parallel connection that said each monitoring unit equates with quantity;

Said monitoring unit comprises:

Parallelly connected with said single battery, gather the voltage of said single battery, and export the voltage acquisition module of collection result;

Parallelly connected with said single battery, guarantee the equalizing circuit that each single battery electric weight is balanced;

Said battery protecting circuit also comprises:

Connect with said multiple batteries, according to said collection result, control multiple batteries integral body discharges and recharges the battery terminal controller of conducting state.

In the said structure, said equalizing circuit comprises:

Balanced control chip U1, divider resistance R1, capacitor C 1, releasing can resistance R 2 and switching tube;

First test side of said balanced control chip U1 connects the positive pole of said single battery through divider resistance R1; Second test side of said balanced control chip U1 and Enable Pin connect the negative pole of said single battery simultaneously; Said capacitor C 1 is connected between first test side and second test side of balanced control chip U1; The positive pole of the said single battery of high potential termination of said switching tube; The cold end of said switching tube is through releasing the negative pole that ability resistance R 2 connects said single battery, and said control end of switching tube connects the output of said balanced control chip U1.

In the said structure, said switching tube adopts P type metal-oxide-semiconductor Q1, and the grid of said P type metal-oxide-semiconductor Q1 is a control end of switching tube, and the source electrode of said P type metal-oxide-semiconductor Q1 is the hot end of switching tube, and the drain electrode of said P type metal-oxide-semiconductor Q1 is the cold end of switching tube.

In the said structure; Said switching tube adopts positive-negative-positive triode Q2; The base stage of said positive-negative-positive triode Q2 is a control end of switching tube, and the emission of said positive-negative-positive triode Q2 is the hot end of switching tube very, and the current collection of said positive-negative-positive triode Q2 is the cold end of switching tube very.

In the utility model; This battery protecting circuit can be implemented over-charge protective to the multiple batteries of series connection, cross and put protection and short-circuit protection; And can be so that each single battery electric weight is balanced; This battery protecting circuit has low, the convenient for installation and maintenance and reliability advantages of higher of cost, is beneficial to the lithium battery modularization standardization.

Description of drawings

Fig. 1 is the modular structure figure of the battery protecting circuit that provides of the utility model embodiment;

Fig. 2 is the structure chart of the equalizing circuit that provides of the utility model first embodiment;

Fig. 3 is the structure chart of the equalizing circuit that provides of the utility model second embodiment.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Fig. 1 shows the modular structure of the battery protecting circuit that the utility model embodiment provides, and for the ease of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.

Battery protecting circuit is used to protect the multiple batteries of series connection, and battery protecting circuit comprises:

Several monitoring units 100, the single battery parallel connection that each monitoring unit 100 equates with quantity;

Monitoring unit 100 comprises:

Parallelly connected with single battery, gather the voltage of single battery, and export the voltage acquisition module 101 of collection result;

Parallelly connected with single battery, guarantee the equalizing circuit 102 that each single battery electric weight is balanced;

Battery protecting circuit also comprises:

Connect with multiple batteries, according to collection result, control multiple batteries integral body discharges and recharges the battery terminal controller 200 of conducting state.

In the utility model embodiment, each monitoring unit 100 is parallelly connected with 4 batteries, and each monitoring unit 100 comprises 4 voltage acquisition modules 101 and 4 equalizing circuits 102.

Fig. 2 shows the structure of the equalizing circuit that the utility model first embodiment provides, and for the ease of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.

Equalizing circuit 102 comprises:

Balanced control chip U1, divider resistance R1, capacitor C 1, releasing can resistance R 2 and switching tube 1021;

The first test side VDD of balanced control chip U1 is through the positive pole of divider resistance R1 order batteries; The negative pole of the second test side VSS of balanced control chip U1 and Enable Pin V-order simultaneously batteries; Capacitor C 1 is connected between the first test side VDD and the second test side VSS of balanced control chip U1; The positive pole of the hot end order batteries of switching tube 1021; The cold end of switching tube 1021 is through releasing the negative pole of ability resistance R 2 order batteries, the output Cout of the balanced control chip U1 of the control termination of switching tube 1021.

As the utility model one embodiment; Switching tube 1021 adopts P type metal-oxide-semiconductor Q1; The grid of P type metal-oxide-semiconductor Q1 is the control end of switch 1021, and the source electrode of P type metal-oxide-semiconductor Q1 is the hot end of switching tube 1021, and the drain electrode of P type metal-oxide-semiconductor Q1 is the cold end of switching tube 1021.

Fig. 3 shows the structure of the equalizing circuit that the utility model second embodiment provides, and for the ease of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.

As the utility model one embodiment; Switching tube 1021 adopts positive-negative-positive triode Q2; The base stage of positive-negative-positive triode Q2 is the control end of switching tube 1021; The emission of positive-negative-positive triode Q2 is the hot end of switching tube 1021 very, and the current collection of positive-negative-positive triode Q2 is the cold end of switching tube 1021 very.

The operation principle of this battery protecting circuit is:

The voltage acquisition module 101 of each monitoring unit 100 is gathered the voltage of battery; After logical operation, collection result is passed to upper level or next stage monitoring unit 100 through monobus, be delivered to battery terminal controller 200 at last; Battery terminal controller 200 discharges and recharges conducting state through logic discrimination control multiple batteries integral body; Thereby the realization over-charge protective is crossed and is put functions such as protection, short-circuit protection.

Monitoring unit 100 can detect the voltage status of each battery battery core in real time; If some battery battery core overtensions in the charging process; The first test side VDD and the second test side VSS of balanced control chip U1 in the equalizing circuit 102 can detect critical voltage; And from 1021 conductings of output Cout output control signal trigger switch pipe; A part of the giving of the charging current shunting of battery released ability resistance R 2, and this cell charging rate will decrease like this, and other do not open balanced batteries still with original current charges.Guarantee to have certain consistency between each battery battery core in this way.

In the utility model embodiment; This battery protecting circuit can be implemented over-charge protective to the multiple batteries of series connection, cross and put protection and short-circuit protection; And can be so that each single battery electric weight is balanced; This battery protecting circuit has low, the convenient for installation and maintenance and reliability advantages of higher of cost, is beneficial to the lithium battery modularization standardization.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims (4)

1. battery protecting circuit is used to protect the multiple batteries of series connection, it is characterized in that said battery protecting circuit comprises:
Several monitoring units, the single battery parallel connection that said each monitoring unit equates with quantity;
Said monitoring unit comprises:
Parallelly connected with said single battery, gather the voltage of said single battery, and export the voltage acquisition module of collection result;
Parallelly connected with said single battery, guarantee the equalizing circuit that each single battery electric weight is balanced;
Said battery protecting circuit also comprises:
Connect with said multiple batteries, according to said collection result, control multiple batteries integral body discharges and recharges the battery terminal controller of conducting state.
2. battery protecting circuit as claimed in claim 1 is characterized in that, said equalizing circuit comprises:
Balanced control chip U1, divider resistance R1, capacitor C 1, releasing can resistance R 2 and switching tube;
First test side of said balanced control chip U1 connects the positive pole of said single battery through divider resistance R1; Second test side of said balanced control chip U1 and Enable Pin connect the negative pole of said single battery simultaneously; Said capacitor C 1 is connected between first test side and second test side of balanced control chip U1; The positive pole of the said single battery of high potential termination of said switching tube; The cold end of said switching tube is through releasing the negative pole that ability resistance R 2 connects said single battery, and said control end of switching tube connects the output of said balanced control chip U1.
3. battery protecting circuit as claimed in claim 2; It is characterized in that; Said switching tube adopts P type metal-oxide-semiconductor Q1; The grid of said P type metal-oxide-semiconductor Q1 is a control end of switching tube, and the source electrode of said P type metal-oxide-semiconductor Q1 is the hot end of switching tube, and the drain electrode of said P type metal-oxide-semiconductor Q1 is the cold end of switching tube.
4. battery protecting circuit as claimed in claim 2; It is characterized in that; Said switching tube adopts positive-negative-positive triode Q2; The base stage of said positive-negative-positive triode Q2 is a control end of switching tube, and the emission of said positive-negative-positive triode Q2 is the hot end of switching tube very, and the current collection of said positive-negative-positive triode Q2 is the cold end of switching tube very.
CN 201120281583 2011-08-04 2011-08-04 Battery protective circuit CN202190065U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120281583 CN202190065U (en) 2011-08-04 2011-08-04 Battery protective circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201120281583 CN202190065U (en) 2011-08-04 2011-08-04 Battery protective circuit
PCT/CN2012/076148 WO2013016974A1 (en) 2011-08-04 2012-05-28 Battery protection circuit

Publications (1)

Publication Number Publication Date
CN202190065U true CN202190065U (en) 2012-04-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
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CN (1) CN202190065U (en)
WO (1) WO2013016974A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013016974A1 (en) * 2011-08-04 2013-02-07 深圳市雄韬电源科技股份有限公司 Battery protection circuit
CN106160119A (en) * 2016-08-26 2016-11-23 中车成都机车车辆有限公司 A kind of electric supply installation for rolling stock communication line
CN106329669A (en) * 2016-11-03 2017-01-11 湖北追日电气股份有限公司 Distributed battery equalization module

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101979A (en) 2012-12-21 2015-11-25 奥卡塔治疗公司 Methods for production of platelets from pluripotent stem cells and compositions thereof
CN107040025B (en) * 2017-05-10 2020-02-28 国网江西省电力有限公司电力科学研究院 Method for realizing integrated circuit special for single storage battery

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3534309B2 (en) * 2000-07-27 2004-06-07 Necトーキン栃木株式会社 Battery pack with temperature protection
CN101471575B (en) * 2007-12-28 2010-12-01 凹凸科技(中国)有限公司 Equilibrium control circuit for multi-battery set
CN101830269A (en) * 2010-03-30 2010-09-15 吕成学 Built-in lithium battery and protection board of built-in electric motor of electric bicycle
CN202190065U (en) * 2011-08-04 2012-04-11 深圳市雄韬电源科技股份有限公司 Battery protective circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013016974A1 (en) * 2011-08-04 2013-02-07 深圳市雄韬电源科技股份有限公司 Battery protection circuit
CN106160119A (en) * 2016-08-26 2016-11-23 中车成都机车车辆有限公司 A kind of electric supply installation for rolling stock communication line
CN106329669A (en) * 2016-11-03 2017-01-11 湖北追日电气股份有限公司 Distributed battery equalization module

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Publication number Publication date
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