CN102403764A - Equalizing circuit for lithium battery - Google Patents
Equalizing circuit for lithium battery Download PDFInfo
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- CN102403764A CN102403764A CN2011103524698A CN201110352469A CN102403764A CN 102403764 A CN102403764 A CN 102403764A CN 2011103524698 A CN2011103524698 A CN 2011103524698A CN 201110352469 A CN201110352469 A CN 201110352469A CN 102403764 A CN102403764 A CN 102403764A
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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 the equalizing circuit field, relate in particular to a kind of lithium battery equalizing circuit.
Background technology
The appearance of lithium battery has changed the World Battery system, and the new forms of energy product that thereupon arises 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 the cell otherness in it; Significantly reduce useful life when causing the series connection high voltage applications, and security performance descends, and is following for fear of problem battery management systems such as battery overcharge, overdischarge.
So the battery pack balancing problem is the emphasis of battery management system.
Traditional equalizing circuit adopts decides voltage, shunt resistance passive type balanced way, and this equalizing circuit is opened bypass resistance when battery terminal voltage reaches a certain set point usually immediately in charging process, shunt; This kind balanced way has shortcomings such as heating is big, portfolio effect difference.
Summary of the invention
The object of the present invention is to provide a kind of lithium battery equalizing circuit, be intended to solve present lithium battery equalizing circuit and have the problem big, the portfolio effect difference of generating heat.
The present invention is achieved in that a kind of lithium battery equalizing circuit, and the lithium battery BT1 with serial connection is connected with lithium battery BT2 respectively, and said lithium battery equalizing circuit 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, first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and energy storage inductor L1;
The positive pole of the said lithium battery BT1 of input termination of said voltage stabilizing chip VR1; The power end of the said balanced control chip U1 of output termination of said voltage stabilizing chip VR1; The equal ground connection of earth terminal of the earth terminal of said voltage stabilizing chip VR1 and balanced control chip U1; First test side of said balanced control chip U1 connects the positive pole of said lithium battery BT1 through said resistance R 2; Said resistance R 4 and resistance R 8 are serially connected between the positive pole and negative pole of said lithium battery BT2; Second of said balanced control chip U1 detects the public connecting end of said resistance R 4 of termination and resistance R 8, said first control end of switching tube of the first control termination of said balanced control chip U1, and the hot end of said first switching tube connects the positive pole of said lithium battery BT1 through said resistance R 3; The hot end of said first switching tube also connects said the 3rd control end of switching tube; The cold end ground connection of said first switching tube, second control end of the said balanced control chip U1 of control termination of said second switch pipe, the positive pole of the said lithium battery BT1 of high potential termination of said second switch pipe; The cold end of said second switch pipe is through said resistance R 6 ground connection; The cold end of said second switch pipe also connects said the 4th control end of switching tube, and the hot end of said the 3rd switching tube connects the positive pole of said lithium battery BT1, the hot end of said the 4th switching tube of electronegative potential termination of said the 3rd switching tube through said resistance R 1; The cold end of said the 4th switching tube is through said resistance R 7 ground connection, and said energy storage inductor L1 is connected between the public connecting end of public connecting end and said lithium battery BT1 and said lithium battery BT2 of said the 3rd switching tube and said the 4th switching tube.
In the said structure; Said first switching tube adopts NPN type triode Q1; The base stage of said NPN type triode Q1 is said first control end of switching tube; The hot end of very said first switching tube of current collection of said NPN type triode Q1, the cold end of very said first switching tube of emission of said NPN type triode Q1.
In the said structure; Said first switching tube adopts N type metal-oxide-semiconductor Q5; The grid of said N type metal-oxide-semiconductor Q5 is said first control end of switching tube; The drain electrode of said N type metal-oxide-semiconductor Q5 is the hot end of said first switching tube, and the source electrode of said N type metal-oxide-semiconductor Q5 is the cold end of said first switching tube.
In the said structure; Said second switch pipe adopts positive-negative-positive triode Q2; The base stage of said positive-negative-positive triode Q2 is the control end of said second switch pipe; The hot end of the very said second switch pipe of emission of said positive-negative-positive triode Q2, the cold end of the very said second switch pipe of current collection of said positive-negative-positive triode Q2.
In the said structure; Said second switch pipe adopts P type metal-oxide-semiconductor Q6; The grid of said P type metal-oxide-semiconductor Q6 is the control end of said second switch pipe; The source electrode of said P type metal-oxide-semiconductor Q6 is the hot end of said second switch pipe, and the drain electrode of said P type metal-oxide-semiconductor Q6 is the cold end of said second switch pipe.
In the said structure; Said the 3rd switching tube adopts P type metal-oxide-semiconductor Q3; The grid of said P type metal-oxide-semiconductor Q3 is said the 3rd control end of switching tube; The drain electrode of said P type metal-oxide-semiconductor Q3 is the hot end of said the 3rd switching tube, and the source electrode of said P type metal-oxide-semiconductor Q3 is the cold end of said the 3rd switching tube.
In the said structure; Said the 3rd switching tube adopts positive-negative-positive triode Q7; The base stage of said positive-negative-positive triode Q7 is said the 3rd control end of switching tube; The hot end of very said the 3rd switching tube of current collection of said positive-negative-positive triode Q7, the cold end of very said the 3rd switching tube of emission of said positive-negative-positive triode Q7.
In the said structure; Said the 4th switching tube adopts N type metal-oxide-semiconductor Q4; The grid of said N type metal-oxide-semiconductor Q4 is said the 4th control end of switching tube; The drain electrode of said N type metal-oxide-semiconductor Q4 is the hot end of said the 4th switching tube, and the source electrode of said N type metal-oxide-semiconductor Q4 is the cold end of said the 4th switching tube.
In the said structure; Said the 4th switching tube adopts NPN type triode Q8; The base stage of said NPN type triode Q8 is said the 4th control end of switching tube; The hot end of very said the 4th switching tube of current collection of said NPN type triode Q8, the cold end of very said the 4th switching tube of emission of said NPN type triode Q8.
In the present invention, this lithium battery equalizing circuit adopts energy storage inductor L1 to shift through the pressure reduction electric weight and transmits balance lithium battery BT1 and lithium battery BT2 voltage, makes their electric voltage equalization, and this lithium battery equalizing circuit has the advantage little, that portfolio effect is good of generating heat.
Description of drawings
Fig. 1 is the circuit structure diagram of the lithium battery equalizing circuit that provides of first embodiment of the invention;
Fig. 2 is the circuit structure diagram of the lithium battery equalizing circuit that provides of second embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention 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 present invention, and be not used in qualification the present invention.
Fig. 1 shows the circuit structure of the lithium battery equalizing circuit that first embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
A kind of lithium battery equalizing circuit, the lithium battery BT1 with serial connection is connected with lithium battery BT2 respectively, and the lithium battery equalizing circuit 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, 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 through 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 first switching tube 101, and the hot end of first switching tube 101 connects the positive pole of lithium battery BT1 through resistance R 3; The hot end of first switching tube 101 also connects the control end of the 3rd switching tube 103; The cold end ground connection of first switching tube 101, the second control end P1.1 of the balanced control chip U1 of the 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 through resistance R 6 ground connection; The cold end of second switch pipe 102 also connects the control end of the 4th switching tube 104, and the hot end of the 3rd switching tube 103 connects the positive pole of lithium battery BT1, the hot end of electronegative potential termination the 4th switching tube 104 of the 3rd switching tube 103 through resistance R 1; The cold end of the 4th switching tube 104 is through resistance R 7 ground connection, and energy storage inductor L1 is connected between the public connecting end of public connecting end and lithium battery BT1 and said lithium battery BT2 of the 3rd switching tube 103 and the 4th switching tube 104.
As one embodiment of the invention; First switching tube 101 adopts NPN type triode Q1; The base stage of NPN type triode Q1 is the control end of first switching tube 101; The current collection of NPN type triode Q1 is the hot end of first switching tube 101 very, and the emission of NPN type triode Q1 is the cold end of 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 emission 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 lithium battery equalizing circuit that second embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
As one embodiment of the invention; 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 first switching tube 101, and the drain electrode of N type metal-oxide-semiconductor Q5 is the hot end of first switching tube 101, and the source electrode of N type metal-oxide-semiconductor Q5 is the cold end of 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 emission 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 emission of NPN type triode Q8 is the cold end of the 4th switching tube 104 very.
To adopt NPN type triode Q1, second switch pipe 102 to adopt positive-negative-positive triode Q2, the 3rd switching tube 103 to adopt P type metal-oxide-semiconductor Q3 and the 4th switching tube 104 to adopt N type metal-oxide-semiconductor Q4 be example that the operation principle of lithium battery equalizing circuit is described with first switching tube 101 below:
Balanced control chip U1 is as a microprocessor; Gather the voltage of lithium battery BT1 and lithium battery BT2 respectively; And voltage and variation tendency according to lithium battery BT1 and lithium battery BT2 are made logic determines, and balanced control chip U1 controls the break-make of P type metal-oxide-semiconductor Q3 and N type metal-oxide-semiconductor Q4 respectively, and its sequence of movement directly influences the state of energy storage inductor L1; Energy storage inductor L1 shift to transmit balance lithium battery BT1 and lithium battery BT2 voltage through the pressure reduction electric weight, makes their electric voltage equalization.
In the present invention, this lithium battery equalizing circuit adopts energy storage inductor L1 to shift through the pressure reduction electric weight and transmits balance lithium battery BT1 and lithium battery BT2 voltage, makes their electric voltage equalization, and this lithium battery equalizing circuit has the advantage little, that portfolio effect is good of generating heat.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a lithium battery equalizing circuit is connected with lithium battery BT2 with the lithium battery BT1 that is connected in series respectively, it is characterized in that said lithium battery equalizing circuit 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, first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and energy storage inductor L1;
The positive pole of the said lithium battery BT1 of input termination of said voltage stabilizing chip VR1; The power end of the said balanced control chip U1 of output termination of said voltage stabilizing chip VR1; The equal ground connection of earth terminal of the earth terminal of said voltage stabilizing chip VR1 and balanced control chip U1; First test side of said balanced control chip U1 connects the positive pole of said lithium battery BT1 through said resistance R 2; Said resistance R 4 and resistance R 8 are serially connected between the positive pole and negative pole of said lithium battery BT2; Second of said balanced control chip U1 detects the public connecting end of said resistance R 4 of termination and resistance R 8, said first control end of switching tube of the first control termination of said balanced control chip U1, and the hot end of said first switching tube connects the positive pole of said lithium battery BT1 through said resistance R 3; The hot end of said first switching tube also connects said the 3rd control end of switching tube; The cold end ground connection of said first switching tube, second control end of the said balanced control chip U1 of control termination of said second switch pipe, the positive pole of the said lithium battery BT1 of high potential termination of said second switch pipe; The cold end of said second switch pipe is through said resistance R 6 ground connection; The cold end of said second switch pipe also connects said the 4th control end of switching tube, and the hot end of said the 3rd switching tube connects the positive pole of said lithium battery BT1, the hot end of said the 4th switching tube of electronegative potential termination of said the 3rd switching tube through said resistance R 1; The cold end of said the 4th switching tube is through said resistance R 7 ground connection, and said energy storage inductor L1 is connected between the public connecting end of public connecting end and said lithium battery BT1 and said lithium battery BT2 of said the 3rd switching tube and said the 4th switching tube.
2. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said first switching tube adopts NPN type triode Q1; The base stage of said NPN type triode Q1 is said first control end of switching tube, the hot end of very said first switching tube of current collection of said NPN type triode Q1, the cold end of very said first switching tube of emission of said NPN type triode Q1.
3. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said first switching tube adopts N type metal-oxide-semiconductor Q5; The grid of said N type metal-oxide-semiconductor Q5 is said first control end of switching tube, and the drain electrode of said N type metal-oxide-semiconductor Q5 is the hot end of said first switching tube, and the source electrode of said N type metal-oxide-semiconductor Q5 is the cold end of said first switching tube.
4. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said second switch pipe adopts positive-negative-positive triode Q2; The base stage of said positive-negative-positive triode Q2 is the control end of said second switch pipe, the hot end of the very said second switch pipe of emission of said positive-negative-positive triode Q2, the cold end of the very said second switch pipe of current collection of said positive-negative-positive triode Q2.
5. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said second switch pipe adopts P type metal-oxide-semiconductor Q6; The grid of said P type metal-oxide-semiconductor Q6 is the control end of said second switch pipe, and the source electrode of said P type metal-oxide-semiconductor Q6 is the hot end of said second switch pipe, and the drain electrode of said P type metal-oxide-semiconductor Q6 is the cold end of said second switch pipe.
6. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said the 3rd switching tube adopts P type metal-oxide-semiconductor Q3; The grid of said P type metal-oxide-semiconductor Q3 is said the 3rd control end of switching tube, and the drain electrode of said P type metal-oxide-semiconductor Q3 is the hot end of said the 3rd switching tube, and the source electrode of said P type metal-oxide-semiconductor Q3 is the cold end of said the 3rd switching tube.
7. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said the 3rd switching tube adopts positive-negative-positive triode Q7; The base stage of said positive-negative-positive triode Q7 is said the 3rd control end of switching tube, the hot end of very said the 3rd switching tube of current collection of said positive-negative-positive triode Q7, the cold end of very said the 3rd switching tube of emission of said positive-negative-positive triode Q7.
8. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said the 4th switching tube adopts N type metal-oxide-semiconductor Q4; The grid of said N type metal-oxide-semiconductor Q4 is said the 4th control end of switching tube, and the drain electrode of said N type metal-oxide-semiconductor Q4 is the hot end of said the 4th switching tube, and the source electrode of said N type metal-oxide-semiconductor Q4 is the cold end of said the 4th switching tube.
9. lithium battery equalizing circuit as claimed in claim 1; It is characterized in that; Said the 4th switching tube adopts NPN type triode Q8; The base stage of said NPN type triode Q8 is said the 4th control end of switching tube, the hot end of very said the 4th switching tube of current collection of said NPN type triode Q8, the cold end of very said the 4th switching tube of emission of said 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 CN102403764B (en) | 2014-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528371A (en) * | 2017-09-25 | 2017-12-29 | 北方工业大学 | Inductive equalization circuit of lithium battery |
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| 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)
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107528371A (en) * | 2017-09-25 | 2017-12-29 | 北方工业大学 | Inductive equalization circuit of lithium battery |
| CN107528371B (en) * | 2017-09-25 | 2020-09-29 | 北方工业大学 | Inductive equalization circuit of lithium battery |
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| CN102403764B (en) | 2014-01-15 |
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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. |
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