CN103762626A - Equalizing charge control circuit - Google Patents
Equalizing charge control circuit Download PDFInfo
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- CN103762626A CN103762626A CN201310749451.0A CN201310749451A CN103762626A CN 103762626 A CN103762626 A CN 103762626A CN 201310749451 A CN201310749451 A CN 201310749451A CN 103762626 A CN103762626 A CN 103762626A
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Abstract
The invention discloses an equalizing charge control circuit which comprises a charger and a plurality of monomer battery circuits. Each monomer battery circuit comprises a DC/DC converter, a comparing control circuit, a precise resistor R, an electronic switch RY and a monomer battery B, the precise resistors R of the monomer battery circuits are connected in series, the monomer batteries B of the monomer battery circuits are connected in series, the input ends of the DC/DC converters of the monomer battery circuits are connected with the output end of the charger, the output ends of the DC/DC converters pass through contacts of the electronic switches RY and then are connected with two ends of the monomer batteries B, two ends of the monomer batteries B and two ends of the precise resistors R are connected into the comparing control circuits, two-end voltages of the monomer batteries B and two-end voltages of the precise resistors R are compared through the comparing control circuits, and the output ends of the comparing control circuits are connected with coils of the electronic switches RY. The circuit can effectively manage battery packs in an equalizing mode, the consistency of the batteries is improved, and the service life of the battery packs is prolonged.
Description
Technical field
The present invention relates to a kind of charging control circuit, relate in particular to a kind of equalizing charge controlling circuit, belong to charging device technical field.
Background technology
In to series battery charge process, although the electric current by cell is identical, but due to its capacity difference, the degree of depth that discharges and recharges of battery also can be different, and federation capacious is shallow fills shallow putting, and the little federation's super-charge super-discharge of capacity, this just causes, and cell decay capacious is slow, life, the decay that capacity is little is accelerated, the lost of life, and difference between the two can be increasing.
Study with practice and show, the life-span of battery pack, the cycle life of battery pack did not often reach the nominal value of manufacturer far away not as good as the life-span of cell, and very large reason causes because battery in battery pack monomer is inconsistent.Therefore, in order to extend the battery pack life-span, must take effective measures, improve the consistency of battery.
In order to address the above problem, except improving the production technology of storage battery, the difference of bringing because of material, technique etc. while reducing storage battery production, outside the approaching battery of the selectivity index of should trying one's best in use, be necessary, by auxiliary battery equalization system, to improve the inconsistency that battery pack in use produces.Therefore, equalizer is the core component of battery management system, leaves equalizer, even if management system has obtained battery pack measurement data, also does nothing.
Current most balance charger is all to carry out equalizing charge compensation with reference to the cell voltage of monomer, but because balanced monomer battery voltage measuring accuracy is had relatively high expectations, substantially be all millivolt level, like this for a Battery pack group, the measuring accuracy of each monomer requires consistent, because of each battery cell, connect again simultaneously, cannot be altogether, testing circuit needs different Power supplies with control circuit.If control circuit uses too many control chip to carry out shunt and controls, can cause circuit too complicated, cost is high too.The solution of prior art is that testing circuit will be passed to control strip (because way is too many, conventionally needing the micro-chip processor of many A/D mouth) after result isolation by linear optical coupling, and then controls by isolation optocoupler Dui Ge road compensating charge circuit.Therefore, whole circuit complexity, reliability is low.
Summary of the invention
The object of the present invention is to provide a kind of equalizing charge controlling circuit, solve prior art equalizing charge controlling circuit complexity, the problem that cost is high, reliability is low.
Object of the present invention is achieved by the following technical programs:
A kind of equalizing charge controlling circuit, comprise charger 1, multiple cell circuit 2, each cell circuit 2 comprises DC/DC converter 3, comparison control circuit 4, precision resistance R, electronic switch RY, cell B, the precision resistance R of each cell circuit 2 equates, the precision resistance R series connection of each cell circuit 2, the output of series circuit two termination chargers 1, the cell B series connection of each cell circuit 2, the output of series circuit two termination chargers 1, the DC/DC converter 3 of described each cell circuit 2 is inputted the output of termination charger 1, DC/DC converter 3 outputs connect the two ends of cell B behind the contact of electronic switch RY, the two ends access comparison control circuit 4 of the two ends of cell B and precision resistance R, comparison control circuit 4 compares the both end voltage of the both end voltage of cell B and precision resistance R, the coil of the output termination electronic switch RY of described comparison control circuit 4.
Object of the present invention can also further realize by following technical measures:
Aforementioned equalizing charge controlling circuit, wherein comparison control circuit 4 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 1, capacitor C 2, capacitor C 3, amplifier U1A, amplifier U2A, amplifier U3A, transistor Q1, Bi+, Bi-is the voltage input point of i road cell Bi, Si+, Si-is the average reference voltage input point on the i road that precision resistance Ri is corresponding, described cell Bi two termination Bi+, Bi-, described resistance R 2 one termination Bi+, the positive input terminal of another termination amplifier U1A, one termination Bi-of described resistance R 5, the negative input end of another termination amplifier U1A, between the positive-negative input end of two termination amplifier U1A of described capacitor C 1, described resistance R 1 one end ground connection, the positive input terminal of another termination amplifier U1A, described resistance R 6 is connected between the negative input end and output of amplifier U1A, described precision resistance Ri two termination Si+, Si-, described resistance R 11 1 termination Si+, the positive input terminal of another termination amplifier U2A, one termination Si-of described resistance R 12, the negative input end of another termination amplifier U2A, between the positive-negative input end of two termination amplifier U2A of described capacitor C 3, described resistance R 7 one end ground connection, the positive input terminal of another termination amplifier U2A, described resistance R 13 is connected between the negative input end and output of amplifier U2A, the output of one termination amplifier U1A of described resistance R 3, the positive input terminal of another termination amplifier U3A, the output of one termination amplifier U2A of described resistance R 10, the negative input end of another termination amplifier U3A, two ends of described capacitor C 2 are connected between the positive-negative input end of amplifier U3A, the output of one termination amplifier U3A of described resistance R 9, the base stage of another termination transistor Q1, described resistance R 8 one end ground connection, the base stage of another termination transistor Q1, the grounded emitter of described transistor Q1, one end of the collector electrode connecting resistance R4 of described transistor Q1, another termination power VCC of resistance R 4.
Compared with prior art, the invention has the beneficial effects as follows: charging control circuit of the present invention is simple, cost is low, reliability is high.Battery pack is effectively carried out to balanced management, improve the consistency of battery, extended the battery pack life-span.
Accompanying drawing explanation
Fig. 1 is equalizing charge controlling circuit structure chart of the present invention;
Fig. 2 is the circuit diagram of comparison control circuit embodiment mono-of the present invention;
Fig. 3 is the circuit diagram of comparison control circuit embodiment bis-of the present invention;
Fig. 4 is the circuit diagram of comparison control circuit embodiment tri-of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, equalizing charge controlling circuit, comprise charger 1, multiple cell circuit 2, each cell circuit 2 comprises DC/DC converter 3, comparison control circuit 4, precision resistance R, electronic switch RY, cell B, the precision resistance R series connection of each cell circuit 2, the output of series circuit two termination chargers 1, the cell B series connection of each cell circuit 2, the output of series circuit two termination chargers 1, the DC/DC converter 3 of described each cell circuit 2 is inputted the output of termination charger 1, DC/DC converter 3 outputs connect the two ends of cell B behind the contact of electronic switch RY, the two ends access comparison control circuit 4 of the two ends of cell B and precision resistance R, comparison control circuit 4 compares the both end voltage of the both end voltage of cell B and precision resistance R, the coil of the output termination electronic switch RY of described comparison control circuit 4.
As shown in Figure 1, wherein R1, R2 ..., Rn is the precision resistance in each cell circuit, the resistance of each precision resistance is consistent, they are corresponding with each cell of battery pack, but are not connected.Its operation principle is, by the precision resistance of a string series connection, battery pack is averaged to sampling, average sample voltage and each battery cell voltage are compared by amplifier or comparator, when average voltage is during higher than corresponding monomer voltage, control the switch electronic switch closure of the DC/DC rear class of corresponding road monomer, the monomer boost charge on the DC/DC module Gei Ci road on this road, until the monomer voltage on this road equals average voltage, now, the electronic switch of DC/DC rear class disconnects.Like this, the equalizing charge end voltage of each monomer of battery pack is identical, and its electric weight charging is also by basically identical accordingly, the balanced object so just reaching.
As shown in Figure 2, be the specific embodiment of the comparison control circuit 4 of equalizing charge controlling circuit of the present invention, comparison control circuit 4 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 1, capacitor C 2, capacitor C 3, amplifier U1A, amplifier U2A, amplifier U3A, transistor Q1, Bi+, Bi-is the voltage input point of i road cell Bi, Si+, Si-is the average reference voltage input point on the i road that precision resistance Ri is corresponding, described cell Bi two termination Bi+, Bi-, described resistance R 2 one termination Bi+, the positive input terminal of another termination amplifier U1A, one termination Bi-of described resistance R 5, the negative input end of another termination amplifier U1A, between the positive-negative input end of two termination amplifier U1A of described capacitor C 1, described resistance R 1 one end ground connection, the positive input terminal of another termination amplifier U1A, described resistance R 6 is connected between the negative input end and output of amplifier U1A, described precision resistance Ri two termination Si+, Si-, described resistance R 11 1 termination Si+, the positive input terminal of another termination amplifier U2A, one termination Si-of described resistance R 12, the negative input end of another termination amplifier U2A, between the positive-negative input end of two termination amplifier U2A of described capacitor C 3, described resistance R 7 one end ground connection, the positive input terminal of another termination amplifier U2A, described resistance R 13 is connected between the negative input end and output of amplifier U2A, the output of one termination amplifier U1A of described resistance R 3, the positive input terminal of another termination amplifier U3A, the output of one termination amplifier U2A of described resistance R 10, the negative input end of another termination amplifier U3A, two ends of described capacitor C 2 are connected between the positive-negative input end of amplifier U3A, the output of one termination amplifier U3A of described resistance R 9, the base stage of another termination transistor Q1, described resistance R 8 one end ground connection, the base stage of another termination transistor Q1, the grounded emitter of described transistor Q1, one end of the collector electrode connecting resistance R4 of described transistor Q1, another termination power VCC of resistance R 4.
The dividing potential drop input of the precision resistance of the present embodiment is undertaken after differential amplification (mainly playing buffer action) by amplifier U1A, U2A with corresponding cell both end voltage, two inputs that are re-used as the 3rd differential comparison amplifying circuit U3A compare, and the output of amplifier U3A is carried out switch control as control signal to the electronic switch on corresponding road.
As shown in Figure 3, be to adopt control comparison circuit and respective battery monomer altogether, but a kind of embodiment that precision resistance sample circuit adopts differential comparison amplifying circuit to isolate.In Fig. 3, Bi is the voltage input point of i road battery cell, and Si is the average reference voltage input point on the i road that in precision resistance sample circuit, Ri is corresponding.
As shown in Figure 4, be to adopt control comparison circuit and respective battery monomer altogether, but the another kind of embodiment that precision resistance sample circuit adopts differential comparison amplifying circuit to isolate.
In Fig. 4, Bi is the voltage input point of i road battery cell, and Si is the average reference voltage input point on the i road that in precision resistance sample circuit, Ri is corresponding.
In addition to the implementation, the present invention can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of requirement of the present invention.
Claims (2)
1. an equalizing charge controlling circuit, it is characterized in that, comprise charger (1), multiple cell circuit (2), each cell circuit (2) comprises DC/DC converter (3), comparison control circuit (4), precision resistance R, electronic switch RY, cell B, the precision resistance R of each cell circuit (2) equates, the precision resistance R series connection of each cell circuit (2), the output of series circuit two termination chargers (1), the cell B series connection of each cell circuit (2), the output of series circuit two termination chargers (1), the output of DC/DC converter (3) the input termination charger (1) of described each cell circuit (2), DC/DC converter (3) output connects the two ends of cell B behind the contact of electronic switch RY, the two ends access comparison control circuits (4) of the two ends of cell B and precision resistance R, comparison control circuit (4) compares the both end voltage of the both end voltage of cell B and precision resistance R, the coil of the output termination electronic switch RY of described comparison control circuit (4).
2. equalizing charge controlling circuit as claimed in claim 1, is characterized in that, described comparison control circuit (4) comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, capacitor C 1, capacitor C 2, capacitor C 3, amplifier U1A, amplifier U2A, amplifier U3A, transistor Q1, Bi+, Bi-is the voltage input point of i road cell Bi, Si+, Si-is the average reference voltage input point on the i road that precision resistance Ri is corresponding, described cell Bi two termination Bi+, Bi-, described resistance R 2 one termination Bi+, the positive input terminal of another termination amplifier U1A, one termination Bi-of described resistance R 5, the negative input end of another termination amplifier U1A, between the positive-negative input end of two termination amplifier U1A of described capacitor C 1, described resistance R 1 one end ground connection, the positive input terminal of another termination amplifier U1A, described resistance R 6 is connected between the negative input end and output of amplifier U1A, described precision resistance Ri two termination Si+, Si-, described resistance R 11 1 termination Si+, the positive input terminal of another termination amplifier U2A, one termination Si-of described resistance R 12, the negative input end of another termination amplifier U2A, between the positive-negative input end of two termination amplifier U2A of described capacitor C 3, described resistance R 7 one end ground connection, the positive input terminal of another termination amplifier U2A, described resistance R 13 is connected between the negative input end and output of amplifier U2A, the output of one termination amplifier U1A of described resistance R 3, the positive input terminal of another termination amplifier U3A, the output of one termination amplifier U2A of described resistance R 10, the negative input end of another termination amplifier U3A, two ends of described capacitor C 2 are connected between the positive-negative input end of amplifier U3A, the output of one termination amplifier U3A of described resistance R 9, the base stage of another termination transistor Q1, described resistance R 8 one end ground connection, the base stage of another termination transistor Q1, the grounded emitter of described transistor Q1, one end of the collector electrode connecting resistance R4 of described transistor Q1, another termination power VCC of resistance R 4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749451.0A CN103762626A (en) | 2013-12-31 | 2013-12-31 | Equalizing charge control circuit |
| CN201320888466.0U CN203774815U (en) | 2013-12-31 | 2013-12-31 | Equalizing charging control circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749451.0A CN103762626A (en) | 2013-12-31 | 2013-12-31 | Equalizing charge control circuit |
| CN201320888466.0U CN203774815U (en) | 2013-12-31 | 2013-12-31 | Equalizing charging control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103762626A true CN103762626A (en) | 2014-04-30 |
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|---|---|---|---|
| CN201320888466.0U Expired - Fee Related CN203774815U (en) | 2013-12-31 | 2013-12-31 | Equalizing charging control circuit |
| CN201310749451.0A Pending CN103762626A (en) | 2013-12-31 | 2013-12-31 | Equalizing charge control circuit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320888466.0U Expired - Fee Related CN203774815U (en) | 2013-12-31 | 2013-12-31 | Equalizing charging control circuit |
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| CN (2) | CN203774815U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528353A (en) * | 2016-06-21 | 2017-12-29 | 赖永利 | One kind series winding battery voltage balanced method and equalizing circuit |
| CN107623343A (en) * | 2016-07-15 | 2018-01-23 | 重庆无线绿洲通信技术有限公司 | The active equalization method and device of a kind of lithium ion battery |
| CN108847696A (en) * | 2018-06-19 | 2018-11-20 | 安徽师范大学 | A kind of battery charging equalization apparatus and equalization methods |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203774815U (en) * | 2013-12-31 | 2014-08-13 | 江苏嘉钰新能源技术有限公司 | Equalizing charging control circuit |
| CN106602656B (en) * | 2016-12-28 | 2019-07-12 | 中国电子科技集团公司第十八研究所 | Average voltage-based space lithium battery equalization module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050077875A1 (en) * | 2003-10-14 | 2005-04-14 | Bohley Thomas K. | Battery cell balancing circuit |
| CN101192756A (en) * | 2006-12-02 | 2008-06-04 | 比亚迪股份有限公司 | Balance charging and discharging protection circuit of secondary battery and its method |
| CN202014116U (en) * | 2011-03-31 | 2011-10-19 | 杭州高特电子设备有限公司 | Battery group automatic balancing circuit |
| CN103178586A (en) * | 2013-04-15 | 2013-06-26 | 北京空间飞行器总体设计部 | Equalizing charge manager of lithium ion battery pack for spacecraft |
| CN103208827A (en) * | 2012-01-17 | 2013-07-17 | 中国科学院广州能源研究所 | Balance control system and method for high-capacity serial connected battery packs |
| CN203205895U (en) * | 2012-12-04 | 2013-09-18 | 芜湖天元汽车电子有限公司 | Lithium battery energy balance control system |
| CN203774815U (en) * | 2013-12-31 | 2014-08-13 | 江苏嘉钰新能源技术有限公司 | Equalizing charging control circuit |
-
2013
- 2013-12-31 CN CN201320888466.0U patent/CN203774815U/en not_active Expired - Fee Related
- 2013-12-31 CN CN201310749451.0A patent/CN103762626A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050077875A1 (en) * | 2003-10-14 | 2005-04-14 | Bohley Thomas K. | Battery cell balancing circuit |
| CN101192756A (en) * | 2006-12-02 | 2008-06-04 | 比亚迪股份有限公司 | Balance charging and discharging protection circuit of secondary battery and its method |
| CN202014116U (en) * | 2011-03-31 | 2011-10-19 | 杭州高特电子设备有限公司 | Battery group automatic balancing circuit |
| CN103208827A (en) * | 2012-01-17 | 2013-07-17 | 中国科学院广州能源研究所 | Balance control system and method for high-capacity serial connected battery packs |
| CN203205895U (en) * | 2012-12-04 | 2013-09-18 | 芜湖天元汽车电子有限公司 | Lithium battery energy balance control system |
| CN103178586A (en) * | 2013-04-15 | 2013-06-26 | 北京空间飞行器总体设计部 | Equalizing charge manager of lithium ion battery pack for spacecraft |
| CN203774815U (en) * | 2013-12-31 | 2014-08-13 | 江苏嘉钰新能源技术有限公司 | Equalizing charging control circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528353A (en) * | 2016-06-21 | 2017-12-29 | 赖永利 | One kind series winding battery voltage balanced method and equalizing circuit |
| CN107528353B (en) * | 2016-06-21 | 2020-07-03 | 赖永利 | Series battery voltage equalization method and equalization circuit |
| CN107623343A (en) * | 2016-07-15 | 2018-01-23 | 重庆无线绿洲通信技术有限公司 | The active equalization method and device of a kind of lithium ion battery |
| CN108847696A (en) * | 2018-06-19 | 2018-11-20 | 安徽师范大学 | A kind of battery charging equalization apparatus and equalization methods |
| CN108847696B (en) * | 2018-06-19 | 2021-09-28 | 安徽师范大学 | Battery charging equalization device and equalization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203774815U (en) | 2014-08-13 |
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Application publication date: 20140430 |