CN103487628A - Simple circuit for measuring voltage of each single cell in series-connected battery pack containing any number of cells - Google Patents
Simple circuit for measuring voltage of each single cell in series-connected battery pack containing any number of cells Download PDFInfo
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- CN103487628A CN103487628A CN201210190885.7A CN201210190885A CN103487628A CN 103487628 A CN103487628 A CN 103487628A CN 201210190885 A CN201210190885 A CN 201210190885A CN 103487628 A CN103487628 A CN 103487628A
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Abstract
The invention discloses a simple circuit for measuring the voltage of each single cell in a series-connected battery pack containing any number of cells. According to the circuit, single cells of the series-connected battery pack are connected to a subtracter circuit composed of an operational amplifier through a switch network, and the subtracter circuit performs subtraction operations on the voltages on two ends of the single cells so as to obtain the voltage values of the single cells.
Description
Technical field
The present invention relates to a kind of circuit of measuring each monomer battery voltage in any joint series battery.This circuit is connected to each cell in series battery on a subtraction circuit be comprised of operational amplifier by a switching network respectively, by subtraction circuit, each cell both end voltage is done to subtraction and obtains each monomer battery voltage value.
Background technology
Rechargeable battery, as lithium battery, lead-acid battery etc., when series connection is used in groups, need to do monitoring to each monomer battery voltage.For the electric battery of a large amount of series connection, generally adopt special IC or with flying capacitance measurement.Although special IC is easy to use, cost compare is high.Traditional capacitance measurement method that flies needs a large amount of switches, also has the shortcoming that cost is higher.
Summary of the invention
In order to overcome the existing high shortcoming of cost that each monomer battery voltage circuit of electric battery exists of measuring, the invention provides a kind of improved capacitance measurement circuit that flies, be used for measuring each monomer battery voltage in the electric battery of any joint series connection.
The technical solution adopted for the present invention to solve the technical problems: if the series connection joint number is even number, battery Cell (1) in series battery, Cell (3) ... the positive pole of Cell (2n-1) is connecting valve S (1) respectively, S (3) ... S (2n-1), battery Cell (2) ... Cell (2n-2), the positive pole of Cell (2n) is connecting valve S (2) respectively ... S (2n-2), S (2n), wherein n represents random natural number, the negative pole of battery Cell (1) is connected with switch S (0), switch S E0 and SO0 contact resistance R1, switch S O1 and SE1 contact resistance R2, resistance R 1, R2, R3, R4, form a subtraction circuit with operational amplifier Op-Amp.If the series connection joint number is odd number, battery Cell (1), Cell (3) in series battery ... Cell (2n-1), the positive pole of Cell (2n+1) is connecting valve S (1), S (3) respectively ... S (2n-1), S (2n+1), battery Cell (2) ... the positive pole of Cell (2n) is connecting valve S (2) respectively ... S (2n), the negative pole of battery Cell (1) is connected with switch S (0), switch S E0 and SO0 contact resistance R1, switch S O1 and SE1 contact resistance R2, resistance R 1, R2, R3, R4 and operational amplifier Op-Amp form a subtraction circuit.If the series connection joint number is even number, switch S (0), S (2) ... the other end of S (2n-2), S (2n) is connected, and connecting valve SE0 and SE1, switch S (1), S (3) ... the other end of S (2n-1) is connected, and connecting valve SO0 and SO1.If the series connection joint number is odd number, switch S (0), S (2) ... the other end of S (2n) is connected, and connecting valve SE0 and SE1, switch S (1), S (3) ... the other end of S (2n-1), S (2n+1) is connected, and connecting valve SO0 and SO1.The other end contact resistance R3 of resistance R 1 and the negative-phase input of operational amplifier Op-Amp, the output terminal of the other end concatenation operation amplifier Op-Amp of resistance R 3, the other end contact resistance R4 of resistance R 2 and the normal phase input end of operational amplifier Op-Amp, the other end ground connection of resistance R 4.
The invention has the beneficial effects as follows that circuit structure is simple, cheap.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 and Fig. 2 are schematic diagrams of the present invention.
In Fig. 1 and Fig. 2, Cell (1), Cell (2), Cell (3) ... Cell (2n-2), Cell (2n-1), Cell (2n), Cell (2n+1) are the cells of series connection, and they are composed in series series battery as shown in the figure successively.S (0), S (1), S (2), S (3) ... S (2n-2), S (2n-1), S (2n), S (2n+1), SO0, SO1, SE0 and SE1 are switches, R1, R2, R3 and R4 are resistance, Op-Amp is operational amplifier, and VCC is the power supply of operational amplifier Op-Amp.In figure, dotted line represents abridged cell, switch and connecting line thereof.
Embodiment
What Fig. 1 showed is the working method when series connection even number saves cell in electric battery.In Fig. 1, battery Cell (1), Cell (3) in series battery ... the positive pole of Cell (2n-1) is connecting valve S (1), S (3) respectively ... S (2n-1), wherein n represents random natural number.Battery Cell (2) in series battery ... the positive pole of Cell (2n-2), Cell (2n) is connecting valve S (2) respectively ... S (2n-2), S (2n).The negative pole of battery Cell (1) is connected with switch S (0).Switch S (0), S (2) ... the other end of S (2n-2), S (2n) is connected, and connecting valve SE0 and SE1.Switch S (1), S (3) ... the other end of S (2n-1) is connected, and connecting valve SO0 and SO1.The other end contact resistance R1 of switch S E0 and SO0.The other end contact resistance R2 of switch S O1 and SE1.Resistance R 1, R2, R3, R4 and operational amplifier Op-Amp form a subtraction circuit.In figure, dotted line represents abridged cell, switch and connecting line thereof.
While measuring battery Cell (1), turn on-switch S (1), S (0), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (1).
While measuring battery Cell (2), turn on-switch S (2), S (1), SE1 and SO0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2).
While measuring battery Cell (3), turn on-switch S (3), S (2), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (3).
While measuring battery Cell (2n-1), turn on-switch S (2n-1), S (2n-2), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2n-1).
While measuring battery Cell (2n), turn on-switch S (2n), S (2n-1), SE1 and SO0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2n).
For the metering system that is connected on the battery between Cell (3) and Cell (2n-1), can analogize according to the mode that battery Cell (2n-1) and Cell (2n) are measured.
What Fig. 2 showed is the working method when series connection odd number saves cell in electric battery.In Fig. 2, battery Cell (1), Cell (3) in series battery ... the positive pole of Cell (2n-1), Cell (2n+1) is connecting valve S (1), S (3) respectively ... S (2n-1), S (2n+1), wherein n represents random natural number.Battery Cell (2) in series battery ... the positive pole of Cell (2n) is connecting valve S (2) respectively ... S (2n).The negative pole of battery Cell (1) is connected with switch S (0).Switch S (0), S (2) ... the other end of S (2n) is connected, and connecting valve SE0 and SE1.Switch S (1), S (3) ... the other end of S (2n-1), S (2n+1) is connected, and connecting valve SO0 and SO1.The other end contact resistance R1 of switch S E0 and SO0.The other end contact resistance R2 of switch S O1 and SE1.Resistance R 1, R2, R2, R4 and operational amplifier Op-Amp form a subtraction circuit.In figure, dotted line represents abridged cell, switch and connecting line thereof.
While measuring battery Cell (1), turn on-switch S (1), S (0), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (1).
While measuring battery Cell (2), turn on-switch S (2), S (1), SE1 and SO0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2).
While measuring battery Cell (3), turn on-switch S (3), S (2), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (3).
While measuring battery Cell (2n), turn on-switch S (2n), S (2n-1), SE1 and SO0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2n).
While measuring battery Cell (2n+1), turn on-switch S (2n+1), S (2n), SO1 and SE0, other switches keep off state, and the subtraction circuit formed by resistance R 1, R2, R3, R4 and operational amplifier Op-Amp obtains the voltage signal of battery Cell (2n+1).
For the metering system that is connected on the battery between Cell (3) and Ccll (2n), can analogize according to the mode that battery Cell (2n-1) and Cell (2n) are measured.
Claims (5)
1. a simple circuit of measuring each monomer battery voltage in any joint series battery, it is characterized in that: if the series connection joint number is even number, battery Cell (1) in series battery, Cell (3) ... the positive pole of Cell (2n-1) is connecting valve S (1) respectively, S (3) ... S (2n-1), pond, pond Cell (2) ... Cell (2n-2), the positive pole of Cell (2n) is connecting valve S (2) respectively ... S (2n-2), S (2n), wherein n represents random natural number, the negative pole of battery Cell (1) is connected with switch S (0), switch S E0 and SO0 contact resistance R1, switch S O1 and SE1 contact resistance R2, resistance R 1, R2, R3, R4, form a subtraction circuit with operational amplifier Op-Amp.
2. the simple circuit of measuring each monomer battery voltage in any joint series battery according to claim 1, it is characterized in that: if the series connection joint number is odd number, battery Cell (1) in series battery, Cell (3) ... Cell (2n-1), the positive pole of Cell (2n+1) is connecting valve S (1) respectively, S (3) ... S (2n-1), S (2n+1), battery Cell (2) ... the positive pole of Cell (2n) is connecting valve S (2) respectively ... S (2n), the negative pole of battery Cell (1) is connected with switch S (0), switch S E0 and SO0 contact resistance R1, switch S O1 and SE1 contact resistance R2, resistance R 1, R2, R3, R4, form a subtraction circuit with operational amplifier Op-Amp.
3. the simple circuit of measuring each monomer battery voltage in any joint series battery according to claim 1, it is characterized in that: if the series connection joint number is even number, switch S (0), S (2) ... the other end of S (2n-2), S (2n) is connected, and connecting valve SE0 and SE1, switch S (1), S (3) ... the other end of S (2n-1) is connected, and connecting valve SO0 and SO1.
4. the simple circuit of measuring each monomer battery voltage in any joint series battery according to claim 1, it is characterized in that: if the series connection joint number is odd number, switch S (0), S (2) ... the other end of S (2n) is connected, and connecting valve SE0 and SE1, switch S (1), S (3) ... the other end of S (2n 1), S (2n+1) is connected, and connecting valve SO0 and SO1.
5. the simple circuit of measuring each monomer battery voltage in any joint series battery according to claim 1, it is characterized in that: the other end contact resistance R3 of resistance R 1 and the negative-phase input of operational amplifier Op-Amp, the output terminal of the other end concatenation operation amplifier Op-Amp of resistance R 3, the other end contact resistance R4 of resistance R 2 and the normal phase input end of operational amplifier Op-Amp, the other end ground connection of resistance R 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210190885.7A CN103487628A (en) | 2012-06-12 | 2012-06-12 | Simple circuit for measuring voltage of each single cell in series-connected battery pack containing any number of cells |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210190885.7A CN103487628A (en) | 2012-06-12 | 2012-06-12 | Simple circuit for measuring voltage of each single cell in series-connected battery pack containing any number of cells |
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| CN103487628A true CN103487628A (en) | 2014-01-01 |
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| CN201210190885.7A Pending CN103487628A (en) | 2012-06-12 | 2012-06-12 | Simple circuit for measuring voltage of each single cell in series-connected battery pack containing any number of cells |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237643A (en) * | 2014-08-28 | 2014-12-24 | 宁德时代新能源科技有限公司 | Method for detecting inner connecting resistor of power battery pack |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356656A (en) * | 1999-06-15 | 2000-12-26 | Sanyo Electric Co Ltd | Terminal voltage detector for battery |
| US20080084217A1 (en) * | 2006-10-06 | 2008-04-10 | Enerdel, Inc. | System and method to measure series-connected cell voltages using a flying capacitor |
| JP2009276297A (en) * | 2008-05-16 | 2009-11-26 | Mazda Motor Corp | Apparatus and method of measuring voltage |
| CN202189131U (en) * | 2011-06-30 | 2012-04-11 | 赵恩海 | Circuit for measuring voltage of 16 cells in serially-connected cell group |
| CN202794291U (en) * | 2012-06-12 | 2013-03-13 | 赵恩海 | Simple circuit for measuring single cell voltages of series battery containing any number of cells |
-
2012
- 2012-06-12 CN CN201210190885.7A patent/CN103487628A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356656A (en) * | 1999-06-15 | 2000-12-26 | Sanyo Electric Co Ltd | Terminal voltage detector for battery |
| US20080084217A1 (en) * | 2006-10-06 | 2008-04-10 | Enerdel, Inc. | System and method to measure series-connected cell voltages using a flying capacitor |
| JP2009276297A (en) * | 2008-05-16 | 2009-11-26 | Mazda Motor Corp | Apparatus and method of measuring voltage |
| CN202189131U (en) * | 2011-06-30 | 2012-04-11 | 赵恩海 | Circuit for measuring voltage of 16 cells in serially-connected cell group |
| CN202794291U (en) * | 2012-06-12 | 2013-03-13 | 赵恩海 | Simple circuit for measuring single cell voltages of series battery containing any number of cells |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237643A (en) * | 2014-08-28 | 2014-12-24 | 宁德时代新能源科技有限公司 | Method for detecting inner connecting resistor of power battery pack |
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