CN204794196U - Balanced control system of group battery initiative - Google Patents
Balanced control system of group battery initiative Download PDFInfo
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- CN204794196U CN204794196U CN201520482847.8U CN201520482847U CN204794196U CN 204794196 U CN204794196 U CN 204794196U CN 201520482847 U CN201520482847 U CN 201520482847U CN 204794196 U CN204794196 U CN 204794196U
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- battery cell
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Abstract
Balanced control system of group battery initiative includes controller and a plurality of equalizer circuit, each equalizer circuit includes switch discharge module, switch charge module and transformer, the controller is arranged in comparing the two arbitrary battery cell's of group battery voltage, has one of them battery cell excessive pressure in two arbitrary battery cell, and when another battery cell was under -voltage, switch that the controller corresponds through excessive pressure battery cell discharged this excessive pressure of module control battery cell and discharges to the vice limit of the transformer of correspondence to through the switch that under -voltage battery cell corresponded charge the module in the future the electric energy on the vice limit of selfcorresponding transformer charge for under -voltage battery cell. The utility model discloses can there be one of them battery cell excessive pressure in two arbitrary battery cell, can charges overcharging of excessive pressure battery cell through the direct under -voltage battery cell of giving in the vice limit of transformer when another battery cell is under -voltage to realize the balanced uniformity between the two arbitrary battery cell in the same group battery.
Description
Technical field
The utility model relates to a kind of battery pack active equalization control system.
Background technology
In recent years, electronic product mainly adopts the battery pack be in series by some lithium ion batteries as main power source, when one group of lithium ion battery is in discharge and recharge, can there is inconsistent situation in the voltage of each cell, often needs to take balance control system to guarantee safety and stability.
But, the circuit of battery pack balancing that existing employing transformer carries out well-balanced adjustment generally single battery overvoltage detected or under-voltage time, often make the cell of overvoltage to whole battery power discharge, or whole battery pack is charged to under-voltage cell, and likely can there is the cell of overvoltage and under-voltage cell in same battery pack simultaneously, in this case, existing equalizing circuit cannot realize total tune, make portfolio effect poor.In addition, this kind of circuit of battery pack balancing needs all to arrange switched oscillation circuit and circuit of synchronous rectification on the former limit of transformer and secondary, and make circuit complicated, consume energy high, cost is high.
Utility model content
For the deficiencies in the prior art, the utility model is intended to provide a kind of battery pack active equalization control system solved the problems of the technologies described above.
For achieving the above object, the utility model adopts following technical scheme:
A kind of battery pack active equalization control system, it comprises controller and the equalizing circuit identical with the cell quantity of battery pack, equalizing circuit and cell one_to_one corresponding; Each equalizing circuit comprises switch discharge module, switched charge module and transformer;
Each cell is all electrically connected the former limit of corresponding transformer by corresponding switch discharge module and switched charge module, the secondary of the transformer of all equalizing circuits is connected in parallel; Switch discharge module and switched charge module are all electrically connected controller;
Controller is used for the voltage of any two cells in comparison battery pack, when there is a wherein cell overvoltage in any two cells, when another cell is under-voltage, controller is discharged to the secondary of corresponding transformer by this overvoltage cell of the switch discharge module controls corresponding to overvoltage cell, and gives the charging of under-voltage cell by the switched charge module corresponding to under-voltage cell by the electric energy of the secondary from corresponding transformer.
Preferably, each equalizing circuit comprises energy storage inductor, the first electronic switch, the second electronic switch, current sampling resistor and this transformer; The former limit Same Name of Ends of transformer connects the positive pole of corresponding cell by energy storage inductor, the former limit different name end of transformer connects the input of the first electronic switch, the output of the first electronic switch connects the negative pole of cell by current sampling resistor, the control end connection control device respectively of the first electronic switch and the second electronic switch, the former limit Same Name of Ends of the input connection transformer of the second electronic switch, the output of the second electronic switch connects the output of the first electronic switch;
Energy storage inductor, the first electronic switch and current sampling resistor form this switch discharge module; Energy storage inductor, the first electronic switch, the second electronic switch and current sampling resistor form this switched charge module.
Preferably, the first electronic switch is field effect transistor, and the input of the first electronic switch, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
Preferably, the second electronic switch is field effect transistor, and the input of the second electronic switch, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
The beneficial effects of the utility model at least comprise following some:
A wherein cell overvoltage can be there is in the utility model in any two cells, when another cell is under-voltage, the secondary of the overcharge of overvoltage cell by transformer is charged directly to under-voltage cell, thus realize the balanced consistency in same battery pack between any two cells.In addition, the secondary of transformer is directly connected in parallel, and effectively can reduce electric energy loss when two cells carry out electric energy transfer, improves equalization efficiency.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the better embodiment of the utility model battery pack active equalization control system.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Refer to 1, the utility model relates to a kind of battery pack active equalization control system, its better embodiment comprises controller (not shown) and the equalizing circuit 10 identical with the cell CELL quantity of battery pack, equalizing circuit 10 and cell CELL one_to_one corresponding; Each equalizing circuit 10 comprises switch discharge module, switched charge module and transformer T1.
Each cell CELL is all electrically connected the former limit of corresponding transformer T1 by corresponding switch discharge module and switched charge module, the secondary of the transformer T1 of all equalizing circuits 10 is connected in parallel; Switch discharge module and switched charge module are all electrically connected controller.
Controller is used for the voltage of any two cell CELL in comparison battery pack, when there is a wherein cell CELL overvoltage in any two cell CELL, when another cell CELL is under-voltage, controller is discharged to the secondary of corresponding transformer T1 by this overvoltage cell of the switch discharge module controls CELL corresponding to overvoltage cell CELL, and charges the electric energy of the secondary from corresponding transformer T1 to under-voltage cell CELL by the switched charge module corresponding to under-voltage cell CELL.
A wherein cell CELL overvoltage can be there is in the utility model in any two cell CELL, when another cell CELL is under-voltage, the secondary of the overcharge of overvoltage cell CELL by transformer is charged directly to under-voltage cell CELL, thus realize the balanced consistency in same battery pack between any two cell CELL.In addition, the secondary of transformer T1 is directly connected in parallel, and effectively can reduce electric energy loss when two cell CELL carry out electric energy transfer, improves equalization efficiency.
In the present embodiment, each equalizing circuit 10 comprises energy storage inductor L1, the first electronic switch Q1, the second electronic switch Q2, current sampling resistor R1 and this transformer T1.
The former limit Same Name of Ends of transformer T1 connects the positive pole of corresponding cell CELL by energy storage inductor L1, the former limit different name end of transformer T1 connects the input of the first electronic switch Q1, the output of the first electronic switch Q1 connects the negative pole of cell CELL by current sampling resistor R1, the control end connection control device respectively of the first electronic switch Q1 and the second electronic switch Q2, the former limit Same Name of Ends of the input connection transformer T1 of the second electronic switch Q2, the output of the second electronic switch Q2 connects the output of the first electronic switch Q1.
When controller will control the electric discharge of overvoltage cell, controller sends the first electronic switch Q1 of discharge signal to corresponding equalizing circuit 10, to drive the first electronic switch Q1 to do high speed switching operation, thus the vibration of driving transformer T1 flyback, outside transmitting energy is to realize equalization discharge; This controller, also according to the duty ratio of the control end signal (i.e. this electrical signal) of the Current Control first electronic switch Q1 of current sampling resistor R1, regulates to realize discharging current.
When controller will control the charging of under-voltage battery, controller synchronously drives the first electronic switch Q1 and the second electronic switch Q2 to do switching manipulation, with synchronous rectification, and then receives electric energy to under-voltage battery charging by energy storage inductor L1 and current sampling resistor.
From above-mentioned principle, energy storage inductor L1, the first electronic switch Q1 and current sampling resistor R1 form this switch discharge module, and energy storage inductor L1, the first electronic switch Q1, the second electronic switch Q2 and current sampling resistor R1 form this switched charge module.
Preferably, the first electronic switch Q1 is field effect transistor, and the input of the first electronic switch Q1, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
Preferably, the second electronic switch Q2 is field effect transistor, and the input of the second electronic switch Q2, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the utility model claim.
Claims (4)
1. a battery pack active equalization control system, is characterized in that: it comprises controller and the equalizing circuit identical with the cell quantity of battery pack, equalizing circuit and cell one_to_one corresponding; Each equalizing circuit comprises switch discharge module, switched charge module and transformer;
Each cell is all electrically connected the former limit of corresponding transformer by corresponding switch discharge module and switched charge module, the secondary of the transformer of all equalizing circuits is connected in parallel; Switch discharge module and switched charge module are all electrically connected controller;
Controller is used for the voltage of any two cells in comparison battery pack, when there is a wherein cell overvoltage in any two cells, when another cell is under-voltage, controller is discharged to the secondary of corresponding transformer by this overvoltage cell of the switch discharge module controls corresponding to overvoltage cell, and gives the charging of under-voltage cell by the switched charge module corresponding to under-voltage cell by the electric energy of the secondary from corresponding transformer.
2. battery pack active equalization control system as claimed in claim 1, is characterized in that: each equalizing circuit comprises energy storage inductor, the first electronic switch, the second electronic switch, current sampling resistor and this transformer; The former limit Same Name of Ends of transformer connects the positive pole of corresponding cell by energy storage inductor, the former limit different name end of transformer connects the input of the first electronic switch, the output of the first electronic switch connects the negative pole of cell by current sampling resistor, the control end connection control device respectively of the first electronic switch and the second electronic switch, the former limit Same Name of Ends of the input connection transformer of the second electronic switch, the output of the second electronic switch connects the output of the first electronic switch;
Energy storage inductor, the first electronic switch and current sampling resistor form this switch discharge module; Energy storage inductor, the first electronic switch, the second electronic switch and current sampling resistor form this switched charge module.
3. battery pack active equalization control system as claimed in claim 2, is characterized in that: the first electronic switch is field effect transistor, and the input of the first electronic switch, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
4. as claimed in claim 2 or claim 3 battery pack active equalization control system, is characterized in that: the second electronic switch is field effect transistor, and the input of the second electronic switch, output and control end are respectively the drain electrode of field effect transistor, source electrode and grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520482847.8U CN204794196U (en) | 2015-07-07 | 2015-07-07 | Balanced control system of group battery initiative |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520482847.8U CN204794196U (en) | 2015-07-07 | 2015-07-07 | Balanced control system of group battery initiative |
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| Publication Number | Publication Date |
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| CN204794196U true CN204794196U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520482847.8U Expired - Fee Related CN204794196U (en) | 2015-07-07 | 2015-07-07 | Balanced control system of group battery initiative |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967172A (en) * | 2015-07-07 | 2015-10-07 | 厦门乾芯能源科技有限公司 | Battery pack active balancing control system |
-
2015
- 2015-07-07 CN CN201520482847.8U patent/CN204794196U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967172A (en) * | 2015-07-07 | 2015-10-07 | 厦门乾芯能源科技有限公司 | Battery pack active balancing control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20210707 |
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| CF01 | Termination of patent right due to non-payment of annual fee |