CN204361734U - A kind of universal control circuit of active equalization - Google Patents
A kind of universal control circuit of active equalization Download PDFInfo
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- CN204361734U CN204361734U CN201520007932.9U CN201520007932U CN204361734U CN 204361734 U CN204361734 U CN 204361734U CN 201520007932 U CN201520007932 U CN 201520007932U CN 204361734 U CN204361734 U CN 204361734U
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- resistance
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- energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of universal control circuit of active equalization, comprise the first sample line and the second sample line that the voltage of adjacent battery pack is sampled respectively, described first sample line is connected with the first bleeder circuit composed in series by the 4th resistance and the 5th resistance, point pressure side of the first bleeder circuit is all connected with an input of the first amplifier and the second amplifier provides a reference voltage to it, described second sample line is connected with by the first resistance, the second bleeder circuit that second resistance and the 3rd resistance compose in series, point pressure side that first resistance is connected with the second resistance is connected with another input of the first amplifier, point pressure side that second resistance is connected with the 3rd resistance is connected with another input of the second amplifier, the output of described first amplifier is uploaded circuit with the energy of equal power circuit and is connected, the output of described second amplifier is connected with the road that conducts electricity under the energy of equal power circuit.Advantage of the present utility model: cost compare is low, is easy to modularization, reduces costs and is convenient to application.
Description
Technical field
The utility model relates to a kind of universal control circuit of active equalization.
Background technology
Existing equal power circuit is generally adopt microprocessor first to sample all battery cell voltages, as shown in Figure 1, calculate which battery cell capacity relative mean values in battery pack more higher, need electric discharge, which relative mean values is on the low side, needs charging, finally controls corresponding equalizing circuit power switch, the element cell making capacity higher discharges to whole Battery pack, and the element cell that capacity is on the low side is charged to it by whole Battery pack.Namely first by MCU sampling battery voltage, then calculate energy content of battery shift direction, finally control power switch and carry out energy trasfer.This circuit is complicated, needs MCU, and sampling needs isolating chip, and switch needs driving chip, and cost is high; Equalization algorithm is complicated, and development cost is high; Need have suitable research to battery, different developers, the effect that can reach is also inconsistent.
Also having is by balanced application-specific integrated circuit (ASIC), and sampling, balanced timesharing are carried out, otherwise can interference mutually.As shown in Figure 2, first integrated circuit sampling battery voltage, then by calculating the height of adjacent battery cell capacity, determine the direction of adjacent cell energy trasfer, last integrated circuit controls power switch, carries out energy trasfer by transformer.The program needs special integrated chip, and cost is high, and to the battery pack of difference string number, application flexibility is poor, is difficult to modularization.And the cell voltage of special integrated chip sampling has scope to limit, the equilibrium of the high-tension battery pack of inapplicable control.
Summary of the invention
The utility model provides that a kind of cost is low, application flexibility good, be easy to the universal control circuit of modular active equalization.
The technical solution adopted in the utility model is:
A kind of universal control circuit of active equalization, it is characterized in that: comprise the first sample line and the second sample line that the voltage of adjacent battery pack is sampled respectively, described first sample line is connected with the first bleeder circuit composed in series by the 4th resistance and the 5th resistance, point pressure side of the first bleeder circuit is all connected with an input of the first amplifier and the second amplifier provides a reference voltage to it, described second sample line is connected with by the first resistance, the second bleeder circuit that second resistance and the 3rd resistance compose in series, point pressure side that first resistance is connected with the second resistance is connected with another input of the first amplifier, point pressure side that second resistance is connected with the 3rd resistance is connected with another input of the second amplifier, the output of described first amplifier is uploaded circuit with the energy of equal power circuit and is connected, the output of described second amplifier is connected with the road that conducts electricity under the energy of equal power circuit.Control circuit of the present utility model is by sampling respectively to the voltage of adjacent battery pack, after logical operation relatively being carried out to voltage by two amplifiers after sampling, export energy up-delivering signal by the first amplifier and upload circuit to energy, or the number of delivering a letter is to the road that conducts electricity under energy under exporting energy by the second amplifier, realize the Energy Transfer between adjacent cell group, use common amplifier can realize the function of control circuit, cost is low, applied widely, be easy to modularization, be convenient to application, and be applicable to the control of the higher battery pack balancing power circuit of voltage.
Further, when each branch pressure voltage of the second bleeder circuit is greater than reference voltage, described first amplifier exports high level signal, described second amplifier output low level signal, when each branch pressure voltage of the second bleeder circuit is less than reference voltage, described first amplifier output low level signal, described second amplifier exports high level signal.
Further, when each branch pressure voltage of the second bleeder circuit with reference voltage close to time equal or equal, described first amplifier output low level signal, described second amplifier output low level signal.Now the energy of the equal power circuit road that conducts electricity under uploading circuit and energy does not all work.
Further, the resistance of the first resistance and the resistance of the 3rd resistance are much larger than the resistance of the second resistance.Always the effect of the second resistance in the second bleeder circuit prevents equalizing circuit from transmitting energy back and forth, causes portion of energy loss in circuit, cause energy waste, makes in the second bleeder circuit two branch pressure voltages close to equal simultaneously.
Further, the dividing ratios of the first bleeder circuit is greater than the dividing ratios of point pressure side that the second resistance is connected with the 3rd resistance and is less than the dividing ratios of point pressure side that the first resistance is connected with the second resistance.
Further, point pressure side of described first bleeder circuit is provided with voltage follower, is used for increasing the driving force of reference voltage, prevents from being disturbed or being drawn partially by the load of back.If the voltage of the first sampling electric wire sampling is little, and in the input voltage range of selected amplifier, so, the first bleeder circuit herein and voltage follower just no longer need, because a battery inherently very strong source.
The beneficial effects of the utility model: the control being applicable to the higher battery pack balancing power circuit of voltage; Use common amplifier as control circuit main devices, cost compare is low; Wide accommodation, buck, boost, flyback, forward circuit is all applicable; Be easy to modularization, reduce costs and be convenient to application.
Accompanying drawing explanation
Fig. 1 is a kind of structural circuit figure of existing equal power circuit.
Fig. 2 is the another kind of structural circuit figure of existing equal power circuit.
Fig. 3 is schematic block circuit diagram of the present utility model.
Fig. 4 is use structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is further described, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model covers all alternatives, improvement project and the equivalents that may comprise in Claims scope.
With reference to Fig. 3, Fig. 4, a kind of universal control circuit of active equalization, comprises first sample line 11 and second sample line 12 of sampling respectively to the voltage of adjacent battery pack 4, described first sample line 11 is connected with by the 4th resistance R
4with the 5th resistance R
5the first bleeder circuit composed in series, point pressure side p of the first bleeder circuit all with the first amplifier U
1with the second amplifier U
2an input connect and provide a reference voltage to it, described second sample line 12 is connected with by the first resistance R
1, the second resistance R
2with the 3rd resistance R
3the second bleeder circuit composed in series, the first resistance R
1with the second resistance R
2point pressure side m and the first amplifier U connected
1another input connect, the second resistance R
2with the 3rd resistance R
3point pressure side n and the second amplifier U connected
2another input connect, described first amplifier U
1output upload circuit 2 with the energy of equal power circuit and be connected, described second amplifier U
2output be connected with the road 3 that conducts electricity under the energy of equal power circuit, (problem of the words with mark in claims).Control circuit 1 of the present utility model by sampling respectively to the voltage of adjacent battery pack 4, after carrying out logical operation relatively by two amplifiers to voltage after sampling, by the first amplifier U
1export energy up-delivering signal and upload circuit 2 to energy, or by the second amplifier U
2under exporting energy, the number of delivering a letter is to the road 3 that conducts electricity under energy, realize the Energy Transfer between adjacent cell group 4, use common amplifier can realize the function of control circuit 1, cost is low, applied widely, be easy to modularization, be convenient to application, and be applicable to the control of the higher battery pack balancing power circuit of voltage.
The present embodiment when each branch pressure voltage Vm and Vn of the second bleeder circuit is greater than reference voltage Vref, described first amplifier U
1export high level signal, described second amplifier U
2output low level signal, when each branch pressure voltage Vm and Vn of the second bleeder circuit is less than reference voltage Vref, described first amplifier U
1output low level signal, described second amplifier U
2export high level signal.
The present embodiment when each branch pressure voltage Vm and Vn of the second bleeder circuit with reference voltage Vref close to time equal or equal, described first amplifier U
1output low level signal, described second amplifier U
2output low level signal.Now the energy of the equal power circuit road 3 that conducts electricity under uploading circuit 2 and energy does not all work.
The present embodiment first resistance R
1resistance and the 3rd resistance R
3resistance much larger than the second resistance R
2resistance, i.e. R
1" R
2, R
3" R
2.The second resistance R in second bleeder circuit
2effect be prevent equalizing circuit from transmitting energy back and forth always, cause portion of energy loss in circuit, cause energy waste, make in the second bleeder circuit two branch pressure voltage Vm and Vn close to equal simultaneously.
The dividing ratios of the present embodiment first bleeder circuit is greater than the second resistance R
2with the 3rd resistance R
3connect point pressure side dividing ratios and be less than the first resistance R
1with the second resistance R
2the dividing ratios of point pressure side connected, i.e. R
3/ (R
1+ R
2+ R
3) <R
5/ (R
4+ R
5) < (R
2+ R
3)/(R
1+ R
2+ R
3).
Point pressure side p of the first bleeder circuit described in the present embodiment is provided with voltage follower U
3, be used for increasing the driving force of reference voltage, prevent from being disturbed or being drawn partially by the load of back.If the voltage that the first sampling electric wire 11 is sampled is little, and in the input voltage range of selected amplifier, so, the first bleeder circuit herein and voltage follower U
3just no longer need, because a battery inherently very strong source.
Operation principle of the present utility model:
The power section of equalizing circuit, road 3 two parts that conduct electricity under uploading circuit 2 and energy by energy form, the energy road 3 that conducts electricity under uploading circuit 2 and energy is BUCK topological structure, boost topological structure, flyback topologies structure or forward topology structure, make applied widely, particular type can need to select according to the power of reality, electric pressure etc.Such as power is less, and voltage is lower, can select buck, boost circuit; Power is medium, and voltage is higher, can select circuit of reversed excitation; Power is comparatively large, and voltage is also higher, then the circuit such as can select forward, recommend.From anode down, pass under in upper battery pack, the downward battery pack transfer of energy is called energy, in lower battery pack, the transfer of energy upward cell group is called that energy is uploaded.
Control circuit is first through the high-voltage value V of the lower battery pack of the first sample line 11 sampling
a, the 4th resistance R in the first bleeder circuit
4with the 5th resistance R
5dividing potential drop obtain a reference voltage Vref, this reference voltage is as the first amplifier U
1with the second amplifier U
2reference value.
The high-voltage value of the upper battery pack of the second sample line 12 sampling again, i.e. B point voltage V
b, by the first resistance R of resistance second bleeder circuit
1, the second resistance R
2, the 3rd resistance R
3dividing potential drop obtains Vm and Vn, Vm and Vn conducts electricity under uploading circuit and energy respectively as energy the output voltage sampled signal on road, two compare with Vref respectively, the error signal produced is as the error signal of two circuit output voltages, and through compensating the compensation pin of the control chip being incorporated into the road that to conduct electricity under energy uploads circuit and energy after (G), as the comp pin of 38xx series, thus realize the control to loop of power circuit.The control of control circuit 1 pair of loop of power circuit is control realization by compensating pin to control chip, so when the control signal current capacity that exports of operational amplifier is much larger than the current capacity of comp script body, just can do effective control to comp pin.The i.e. compensation loop of external compensation circuit override inside.
Suppose the very balanced i.e. V of two battery pack
b≈ 2V
atime, resistance R is set
1, R
2and R
3dividing potential drop, makes Vm equal or is equal to or slightly less than Vref slightly larger than Vref, Vn, and uploading energy and passing energy control signal down of now exporting is all low, and the loop compensation comp pin of equalizing circuit control chip drags down by this signal, and circuit does not work.In control circuit, energy is uploaded and passed down is reverse in logic, can not work simultaneously.After equalizing circuit powers on, control circuit 1 compares V
amagnitude of voltage and V
b-V
amagnitude of voltage, judge the size of two battery pack 4 voltages, if V
alower, V
a<1/2 V
b, now by V
aa reference voltage Vref is obtained, V by the dividing potential drop of the 4th resistance R4 and the 5th resistance R5
bobtain Vm and Vn by the first resistance R1, the second resistance R2 and the 3rd resistance R3 dividing potential drop, due to dead band second resistance R2, so Vn is slightly less than Vm, this prevents equalizing circuit from transmitting energy back and forth always, because V
a<1/2V
bso Vm>Vref, Vn>Vref, first amplifier U1, the second amplifier U2 are after logical operation, first amplifier U1 output low level, the second amplifier U2 exports high level, and namely under output energy, the number of delivering a letter is given to the control chip comp pin on the road 3 that conducts electricity under energy, equal power circuit is started working, and energy starts to be shifted by the downward battery pack of upper battery pack.If V
b-V
alower, V
a>1/2 V
b, same V
avref is obtained, V by the dividing potential drop of the 4th resistance R4 and the 5th resistance R5
bvm and Vn is obtained, because V by the first resistance R1, the second resistance R2 and the 3rd resistance R3 dividing potential drop
a>1/2V
bso Vm<Vref, Vn<Vref, first amplifier U1, the second amplifier U2 are after logical operation, first amplifier U1 exports high level, the second amplifier U2 output low level, namely exports energy up-delivering signal uploads circuit 2 control chip comp pin to energy, equal power circuit is started working, and energy starts to be shifted by lower battery pack upward cell group.
Claims (6)
1. the universal control circuit of an active equalization, it is characterized in that: comprise the first sample line and the second sample line that the voltage of adjacent battery pack is sampled respectively, described first sample line is connected with the first bleeder circuit composed in series by the 4th resistance and the 5th resistance, point pressure side of the first bleeder circuit is all connected with an input of the first amplifier and the second amplifier provides a reference voltage to it, described second sample line is connected with by the first resistance, the second bleeder circuit that second resistance and the 3rd resistance compose in series, point pressure side that first resistance is connected with the second resistance is connected with another input of the first amplifier, point pressure side that second resistance is connected with the 3rd resistance is connected with another input of the second amplifier, the output of described first amplifier is uploaded circuit with the energy of equal power circuit and is connected, the output of described second amplifier is connected with the road that conducts electricity under the energy of equal power circuit.
2. the universal control circuit of active equalization as claimed in claim 1, it is characterized in that: when each branch pressure voltage of the second bleeder circuit is greater than reference voltage, described first amplifier exports high level signal, described second amplifier output low level signal, when each branch pressure voltage of the second bleeder circuit is less than reference voltage, described first amplifier output low level signal, described second amplifier exports high level signal.
3. the universal control circuit of active equalization as claimed in claim 1, it is characterized in that: when each branch pressure voltage of the second bleeder circuit with reference voltage close to time equal or equal, described first amplifier output low level signal, described second amplifier output low level signal.
4. the universal control circuit of active equalization as claimed in claim 1, is characterized in that: the resistance of the first resistance and the resistance of the 3rd resistance are much larger than the resistance of the second resistance.
5. the universal control circuit of active equalization as claimed in claim 1, is characterized in that: the dividing ratios of the first bleeder circuit is greater than the dividing ratios of point pressure side that the second resistance is connected with the 3rd resistance and is less than the dividing ratios of point pressure side that the first resistance is connected with the second resistance.
6. the universal control circuit of the active equalization as described in one of claim 1 ~ 5, is characterized in that: point pressure side of described first bleeder circuit is provided with voltage follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520007932.9U CN204361734U (en) | 2015-01-07 | 2015-01-07 | A kind of universal control circuit of active equalization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520007932.9U CN204361734U (en) | 2015-01-07 | 2015-01-07 | A kind of universal control circuit of active equalization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204361734U true CN204361734U (en) | 2015-05-27 |
Family
ID=53263181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520007932.9U Active CN204361734U (en) | 2015-01-07 | 2015-01-07 | A kind of universal control circuit of active equalization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204361734U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617612A (en) * | 2015-01-07 | 2015-05-13 | 杭州协能科技有限公司 | Driving balanced universal control circuit |
| CN113872288A (en) * | 2021-09-28 | 2021-12-31 | 傲普(上海)新能源有限公司 | Voltage balancing circuit and method for battery monomer in battery module |
-
2015
- 2015-01-07 CN CN201520007932.9U patent/CN204361734U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617612A (en) * | 2015-01-07 | 2015-05-13 | 杭州协能科技有限公司 | Driving balanced universal control circuit |
| CN104617612B (en) * | 2015-01-07 | 2017-01-04 | 杭州协能科技股份有限公司 | A kind of universal control circuit of active equalization |
| CN113872288A (en) * | 2021-09-28 | 2021-12-31 | 傲普(上海)新能源有限公司 | Voltage balancing circuit and method for battery monomer in battery module |
| CN113872288B (en) * | 2021-09-28 | 2023-07-18 | 傲普(上海)新能源有限公司 | Voltage balancing circuit and method for battery cells in battery module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Zhejiang science and technology industrial building 80 No. 310012 Zhejiang city of Hangzhou province Xihu District GUCUI Road Room 801 Patentee after: Hangzhou Polytron Technologies Inc Address before: Hangzhou City, Zhejiang province 310012 GUCUI Road No. 80, Zhejiang science and Technology Industrial Building 8 floor Patentee before: Hangzhou Bmser Technology Co., Ltd. |