CN102403764B - Equalizing circuit for lithium battery - Google Patents
Equalizing circuit for lithium battery Download PDFInfo
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- CN102403764B CN102403764B CN201110352469.8A CN201110352469A CN102403764B CN 102403764 B CN102403764 B CN 102403764B CN 201110352469 A CN201110352469 A CN 201110352469A CN 102403764 B CN102403764 B CN 102403764B
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Abstract
The invention is suitable for the field of an equalizing circuit, and particularly relates to an equalizing circuit for a lithium battery. In the embodiment of the invention, the equalizing circuit for the lithium battery uses an energy storage inductance L1 to balance the voltage of a lithium battery BT1 and a lithium battery BT2 by transferring and transmitting voltage differential electric quantity, so that the voltage of the lithium batteries is balanced. The equalizing circuit for the lithium battery has the advantages of small heat productivity, and a good equalizing effect.
Description
Technical field
The invention belongs to equalizing circuit field, relate in particular to a kind of equalizing circuit for lithium battery.
Background technology
The appearance of lithium battery has changed World Battery system, and the new forms of energy product thereupon arising at the historic moment will bring great variety to human society in future.Lithium battery has stronger advantage as the newcomer of battery family, but still there is cell otherness in it, while causing series connection high voltage applications, significantly reduce useful life, and security performance declines, following for fear of problem battery management systems such as battery overcharge, overdischarge.
So battery pack balancing problem is the emphasis of battery management system.
Traditional equalizing circuit adopts determines voltage, shunt resistance passive type balanced way, and this equalizing circuit is opened immediately bypass resistance when battery terminal voltage reaches a certain set point conventionally in charging process, shunts; This kind of balanced way has the shortcomings such as heating is large, portfolio effect is poor.
Summary of the invention
The object of the present invention is to provide a kind of equalizing circuit for lithium battery, be intended to solve present equalizing circuit for lithium battery and have generate heat large, the poor problem of portfolio effect.
The present invention is achieved in that a kind of equalizing circuit for lithium battery, is connected respectively with the lithium battery BT1 of serial connection with lithium battery BT2, and described equalizing circuit for lithium battery comprises:
Balanced control chip U1, voltage stabilizing chip VR1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and energy storage inductor L1;
The positive pole of lithium battery BT1 described in the input termination of described voltage stabilizing chip VR1, the power end of balanced control chip U1 described in the output termination of described voltage stabilizing chip VR1, the equal ground connection of earth terminal of the earth terminal of described voltage stabilizing chip VR1 and balanced control chip U1, the first test side of described balanced control chip U1 connects the positive pole of described lithium battery BT1 by described resistance R 2, the first test side of described balanced control chip U1 is by resistance R 5 ground connection, described resistance R 4 and resistance R 8 are serially connected between the positive pole and negative pole of described lithium battery BT2, the public connecting end of resistance R 4 and resistance R 8 described in the second detection termination of described balanced control chip U1, the control end of the first switching tube described in the first control termination of described balanced control chip U1, the hot end of described the first switching tube connects the positive pole of described lithium battery BT1 by described resistance R 3, the hot end of described the first switching tube also connects the control end of described the 3rd switching tube, the cold end ground connection of described the first switching tube, the second control end of balanced control chip U1 described in the control termination of described second switch pipe, the positive pole of lithium battery BT1 described in the high potential termination of described second switch pipe, the cold end of described second switch pipe is by described resistance R 6 ground connection, the cold end of described second switch pipe also connects the control end of described the 4th switching tube, the hot end of described the 3rd switching tube connects the positive pole of described lithium battery BT1 by described resistance R 1, the hot end of the 4th switching tube described in the electronegative potential termination of described the 3rd switching tube, the cold end of described the 4th switching tube is by described resistance R 7 ground connection, described energy storage inductor L1 is connected between the public connecting end and described lithium battery BT1 and the public connecting end of described lithium battery BT2 of described the 3rd switching tube and described the 4th switching tube.
In said structure, described the first switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described the first switching tube, the hot end of very described the first switching tube of current collection of described NPN type triode Q1, the cold end of very described the first switching tube of transmitting of described NPN type triode Q1.
In said structure, described the first switching tube adopts N-type metal-oxide-semiconductor Q5, the grid of described N-type metal-oxide-semiconductor Q5 is the control end of described the first switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q5 is the hot end of described the first switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q5 is the cold end of described the first switching tube.
In said structure, described second switch pipe adopts positive-negative-positive triode Q2, the base stage of described positive-negative-positive triode Q2 is the control end of described second switch pipe, the hot end of the very described second switch pipe of transmitting of described positive-negative-positive triode Q2, the cold end of the very described second switch pipe of current collection of described positive-negative-positive triode Q2.
In said structure, described second switch pipe adopts P type metal-oxide-semiconductor Q6, the grid of described P type metal-oxide-semiconductor Q6 is the control end of described second switch pipe, the source electrode of described P type metal-oxide-semiconductor Q6 is the hot end of described second switch pipe, and the drain electrode of described P type metal-oxide-semiconductor Q6 is the cold end of described second switch pipe.
In said structure, described the 3rd switching tube adopts P type metal-oxide-semiconductor Q3, the grid of described P type metal-oxide-semiconductor Q3 is the control end of described the 3rd switching tube, the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described the 3rd switching tube, and the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described the 3rd switching tube.
In said structure, described the 3rd switching tube adopts positive-negative-positive triode Q7, the base stage of described positive-negative-positive triode Q7 is the control end of described the 3rd switching tube, the hot end of very described the 3rd switching tube of current collection of described positive-negative-positive triode Q7, the cold end of very described the 3rd switching tube of transmitting of described positive-negative-positive triode Q7.
In said structure, described the 4th switching tube adopts N-type metal-oxide-semiconductor Q4, the grid of described N-type metal-oxide-semiconductor Q4 is the control end of described the 4th switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q4 is the hot end of described the 4th switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q4 is the cold end of described the 4th switching tube.
In said structure, described the 4th switching tube adopts NPN type triode Q8, the base stage of described NPN type triode Q8 is the control end of described the 4th switching tube, the hot end of very described the 4th switching tube of current collection of described NPN type triode Q8, the cold end of very described the 4th switching tube of transmitting of described NPN type triode Q8.
In the present invention, this equalizing circuit for lithium battery adopts energy storage inductor L1 to be shifted and transmitted balance lithium battery BT1 and lithium battery BT2 voltage by pressure reduction electric weight, makes their electric voltage equalization, and this equalizing circuit for lithium battery has advantages of that heating is little, portfolio effect good.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the equalizing circuit for lithium battery that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the equalizing circuit for lithium battery that provides of second embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the circuit structure of the equalizing circuit for lithium battery that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
, being connected with lithium battery BT2 with the lithium battery BT1 of serial connection respectively, equalizing circuit for lithium battery comprises:
Balanced control chip U1, voltage stabilizing chip VR1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the first switching tube 101, second switch pipe 102, the 3rd switching tube 103, the 4th switching tube 104 and energy storage inductor L1;
The input Vin of voltage stabilizing chip VR1 connects the positive pole of lithium battery BT1, the output end vo ut of voltage stabilizing chip VR1 meets the power end VDD of balanced control chip U1, the equal ground connection of earth terminal VSS of the earth terminal GND of voltage stabilizing chip VR1 and balanced control chip U1, the first test side ADC0 of balanced control chip U1 connects the positive pole of lithium battery BT1 by resistance R 2, resistance R 4 and resistance R 8 are serially connected between the positive pole and negative pole of lithium battery BT2, the second test side ADC2 connecting resistance R4 of balanced control chip U1 and the public connecting end of resistance R 8, the first control end P1.0 of balanced control chip U1 connects the control end of the first switching tube 101, the hot end of the first switching tube 101 connects the positive pole of lithium battery BT1 by resistance R 3, the hot end of the first switching tube 101 also connects the control end of the 3rd switching tube 103, the cold end ground connection of the first switching tube 101, the second control end P1.1 of the balanced control chip U1 of control termination of second switch pipe 102, the positive pole of the high potential termination lithium battery BT1 of second switch pipe 102, the cold end of second switch pipe 102 is by resistance R 6 ground connection, the cold end of second switch pipe 102 also connects the control end of the 4th switching tube 104, the hot end of the 3rd switching tube 103 connects the positive pole of lithium battery BT1 by resistance R 1, the hot end of electronegative potential termination the 4th switching tube 104 of the 3rd switching tube 103, the cold end of the 4th switching tube 104 is by resistance R 7 ground connection, energy storage inductor L1 is connected between the public connecting end and lithium battery BT1 and the public connecting end of described lithium battery BT2 of the 3rd switching tube 103 and the 4th switching tube 104.
As one embodiment of the invention, the first switching tube 101 adopts NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of the first switching tube 101, the current collection of NPN type triode Q1 is the hot end of the first switching tube 101 very, and the transmitting of NPN type triode Q1 is the cold end of the first switching tube 101 very.
As one embodiment of the invention, second switch pipe 102 adopts positive-negative-positive triode Q2, the base stage of positive-negative-positive triode Q2 is the control end of second switch pipe 102, the transmitting of positive-negative-positive triode Q2 is the hot end of second switch pipe 102 very, and the current collection of positive-negative-positive triode Q2 is the cold end of second switch pipe 102 very.
As one embodiment of the invention, the 3rd switching tube 103 adopts P type metal-oxide-semiconductor Q3, the grid of P type metal-oxide-semiconductor Q3 is the control end of the 3rd switching tube 103, and the drain electrode of P type metal-oxide-semiconductor Q3 is the hot end of the 3rd switching tube 103, and the source electrode of P type metal-oxide-semiconductor Q3 is the cold end of the 3rd switching tube 103.
As one embodiment of the invention, the 4th switching tube 104 adopts N-type metal-oxide-semiconductor Q4, the grid of N-type metal-oxide-semiconductor Q4 is the control end of the 4th switching tube 104, and the drain electrode of N-type metal-oxide-semiconductor Q4 is the hot end of the 4th switching tube 104, and the source electrode of N-type metal-oxide-semiconductor Q4 is the cold end of the 4th switching tube 104.
Fig. 2 shows the circuit structure of the equalizing circuit for lithium battery that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
As one embodiment of the invention, the first switching tube 101 adopts N-type metal-oxide-semiconductor Q5, the grid of N-type metal-oxide-semiconductor Q5 is the control end of the first switching tube 101, and the drain electrode of N-type metal-oxide-semiconductor Q5 is the hot end of the first switching tube 101, and the source electrode of N-type metal-oxide-semiconductor Q5 is the cold end of the first switching tube 101.
As one embodiment of the invention, second switch pipe 102 adopts P type metal-oxide-semiconductor Q6, the grid of P type metal-oxide-semiconductor Q6 is the control end of second switch pipe 102, and the source electrode of P type metal-oxide-semiconductor Q6 is the hot end of second switch pipe 102, and the drain electrode of P type metal-oxide-semiconductor Q6 is the cold end of second switch pipe 102.
As one embodiment of the invention, the 3rd switching tube 103 adopts positive-negative-positive triode Q7, the base stage of positive-negative-positive triode Q7 is the control end of the 3rd switching tube 103, the current collection of positive-negative-positive triode Q7 is the hot end of the 3rd switching tube 103 very, and the transmitting of positive-negative-positive triode Q7 is the cold end of the 3rd switching tube 103 very.
As one embodiment of the invention, the 4th switching tube 104 adopts NPN type triode Q8, the base stage of NPN type triode Q8 is the control end of the 4th switching tube 104, the current collection of NPN type triode Q8 is the hot end of the 4th switching tube 104 very, and the transmitting of NPN type triode Q8 is the cold end of the 4th switching tube 104 very.
Balanced control chip U1 is as a microprocessor, gather respectively the voltage of lithium battery BT1 and lithium battery BT2, and make logic judgement according to the voltage of lithium battery BT1 and lithium battery BT2 and variation tendency, balanced control chip U1 controls respectively the break-make of P type metal-oxide-semiconductor Q3 and N-type metal-oxide-semiconductor Q4, its sequence of movement directly affects the state of energy storage inductor L1, energy storage inductor L1 is shifted and is transmitted balance lithium battery BT1 and lithium battery BT2 voltage by pressure reduction electric weight, makes their electric voltage equalization.
In the present invention, this equalizing circuit for lithium battery adopts energy storage inductor L1 to be shifted and transmitted balance lithium battery BT1 and lithium battery BT2 voltage by pressure reduction electric weight, makes their electric voltage equalization, and this equalizing circuit for lithium battery has advantages of that heating is little, portfolio effect good.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. an equalizing circuit for lithium battery, is connected with lithium battery BT2 with the lithium battery BT1 of serial connection respectively, it is characterized in that, described equalizing circuit for lithium battery comprises:
Balanced control chip U1, voltage stabilizing chip VR1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and energy storage inductor L1;
The positive pole of lithium battery BT1 described in the input termination of described voltage stabilizing chip VR1, the power end of balanced control chip U1 described in the output termination of described voltage stabilizing chip VR1, the equal ground connection of earth terminal of the earth terminal of described voltage stabilizing chip VR1 and balanced control chip U1, the first test side of described balanced control chip U1 connects the positive pole of described lithium battery BT1 by described resistance R 2, the first test side of described balanced control chip U1 is by resistance R 5 ground connection, described resistance R 4 and resistance R 8 are serially connected between the positive pole and negative pole of described lithium battery BT2, the public connecting end of resistance R 4 and resistance R 8 described in the second detection termination of described balanced control chip U1, the control end of the first switching tube described in the first control termination of described balanced control chip U1, the hot end of described the first switching tube connects the positive pole of described lithium battery BT1 by described resistance R 3, the hot end of described the first switching tube also connects the control end of described the 3rd switching tube, the cold end ground connection of described the first switching tube, the second control end of balanced control chip U1 described in the control termination of described second switch pipe, the positive pole of lithium battery BT1 described in the high potential termination of described second switch pipe, the cold end of described second switch pipe is by described resistance R 6 ground connection, the cold end of described second switch pipe also connects the control end of described the 4th switching tube, the hot end of described the 3rd switching tube connects the positive pole of described lithium battery BT1 by described resistance R 1, the hot end of the 4th switching tube described in the electronegative potential termination of described the 3rd switching tube, the cold end of described the 4th switching tube is by described resistance R 7 ground connection, described energy storage inductor L1 is connected between the public connecting end and described lithium battery BT1 and the public connecting end of described lithium battery BT2 of described the 3rd switching tube and described the 4th switching tube.
2. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the first switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described the first switching tube, the hot end of very described the first switching tube of current collection of described NPN type triode Q1, the cold end of very described the first switching tube of transmitting of described NPN type triode Q1.
3. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the first switching tube adopts N-type metal-oxide-semiconductor Q5, the grid of described N-type metal-oxide-semiconductor Q5 is the control end of described the first switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q5 is the hot end of described the first switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q5 is the cold end of described the first switching tube.
4. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described second switch pipe adopts positive-negative-positive triode Q2, the base stage of described positive-negative-positive triode Q2 is the control end of described second switch pipe, the hot end of the very described second switch pipe of transmitting of described positive-negative-positive triode Q2, the cold end of the very described second switch pipe of current collection of described positive-negative-positive triode Q2.
5. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described second switch pipe adopts P type metal-oxide-semiconductor Q6, the grid of described P type metal-oxide-semiconductor Q6 is the control end of described second switch pipe, the source electrode of described P type metal-oxide-semiconductor Q6 is the hot end of described second switch pipe, and the drain electrode of described P type metal-oxide-semiconductor Q6 is the cold end of described second switch pipe.
6. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the 3rd switching tube adopts P type metal-oxide-semiconductor Q3, the grid of described P type metal-oxide-semiconductor Q3 is the control end of described the 3rd switching tube, the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described the 3rd switching tube, and the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described the 3rd switching tube.
7. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the 3rd switching tube adopts positive-negative-positive triode Q7, the base stage of described positive-negative-positive triode Q7 is the control end of described the 3rd switching tube, the hot end of very described the 3rd switching tube of current collection of described positive-negative-positive triode Q7, the cold end of very described the 3rd switching tube of transmitting of described positive-negative-positive triode Q7.
8. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the 4th switching tube adopts N-type metal-oxide-semiconductor Q4, the grid of described N-type metal-oxide-semiconductor Q4 is the control end of described the 4th switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q4 is the hot end of described the 4th switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q4 is the cold end of described the 4th switching tube.
9. equalizing circuit for lithium battery as claimed in claim 1, it is characterized in that, described the 4th switching tube adopts NPN type triode Q8, the base stage of described NPN type triode Q8 is the control end of described the 4th switching tube, the hot end of very described the 4th switching tube of current collection of described NPN type triode Q8, the cold end of very described the 4th switching tube of transmitting of described NPN type triode Q8.
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| CN201110352469.8A CN102403764B (en) | 2011-11-09 | 2011-11-09 | Equalizing circuit for lithium battery |
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| CN201110352469.8A CN102403764B (en) | 2011-11-09 | 2011-11-09 | Equalizing circuit for lithium battery |
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| CN102403764B true CN102403764B (en) | 2014-01-15 |
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| CN107528371B (en) * | 2017-09-25 | 2020-09-29 | 北方工业大学 | Inductive equalization circuit of lithium battery |
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| US6150795A (en) * | 1999-11-05 | 2000-11-21 | Power Designers, Llc | Modular battery charge equalizers and method of control |
| CN201294390Y (en) * | 2008-09-02 | 2009-08-19 | 安徽东方荣光能源科技有限公司 | All-around high-power mixing dynamic battery |
| CN201402990Y (en) * | 2009-03-16 | 2010-02-10 | 北京能高自动化技术有限公司 | Storage battery equalizer |
| CN101740827A (en) * | 2009-12-25 | 2010-06-16 | 奇瑞汽车股份有限公司 | Active equalization system of lithium-ion power battery and equalization method thereof |
| CN101902060A (en) * | 2010-07-23 | 2010-12-01 | 重庆大学 | Charge-discharge battery pack equilibrium management system |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150795A (en) * | 1999-11-05 | 2000-11-21 | Power Designers, Llc | Modular battery charge equalizers and method of control |
| CN201294390Y (en) * | 2008-09-02 | 2009-08-19 | 安徽东方荣光能源科技有限公司 | All-around high-power mixing dynamic battery |
| CN201402990Y (en) * | 2009-03-16 | 2010-02-10 | 北京能高自动化技术有限公司 | Storage battery equalizer |
| CN101740827A (en) * | 2009-12-25 | 2010-06-16 | 奇瑞汽车股份有限公司 | Active equalization system of lithium-ion power battery and equalization method thereof |
| CN101902060A (en) * | 2010-07-23 | 2010-12-01 | 重庆大学 | Charge-discharge battery pack equilibrium management system |
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Effective date of registration: 20190819 Address after: 518000 Floor 1, 2, 3 and 4 of North Building of No. 9 Xiongtao Science and Technology Park, Tongfu Industrial Zone, Dapeng Town, Shenzhen City, Guangdong Province Patentee after: Shenzhen Xiongtao Lithium Electricity Co., Ltd. Address before: Dapeng town of Shenzhen city in Guangdong province with 518000 ambitious science and Technology Park rich industrial zone Patentee before: Shenzhen Center Power Tech Co., Ltd. |