CN203691028U - Battery equalization system used for electric automobile - Google Patents
Battery equalization system used for electric automobile Download PDFInfo
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- CN203691028U CN203691028U CN201420073041.9U CN201420073041U CN203691028U CN 203691028 U CN203691028 U CN 203691028U CN 201420073041 U CN201420073041 U CN 201420073041U CN 203691028 U CN203691028 U CN 203691028U
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- battery
- cell
- low pressure
- pressure accumulator
- converter
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Abstract
The utility model provides a battery equalization system used for an electric automobile. The battery equalization system includes a battery unit composed of a plurality of single batteries connected in series. A high voltage control system is connected with the battery unit in parallel. A high voltage output wire is connected to the high voltage control system. Each battery is connected with a bidirectional isolation DC-DC converter in parallel. A battery equalization controller is connected with each bidirectional isolation DC-DC converter and a low voltage storage battery through optical fibers. Each bidirectional isolation DC-DC converter is connected with the low-voltage storage battery through a lead. By adopting the above scheme, the battery equalization system is reasonable in structural design and high in intelligent degree. Since each battery is connected with the bidirectional isolation DC-DC converter in parallel and the battery equalization controller is connected with the low voltage storage battery and each bidirectional isolation DC-DC converter through optical fibers, the battery equalization controller collects voltage of the low voltage storage battery and each bidirectional isolation DC-DC converter obtains voltages of each battery.
Description
Technical field:
The utility model relates to a kind of battery equalization system of electric automobile.
Background technology:
On electric automobile, the needed low-voltage electric energy of low-voltage electrical apparatus provides by electrokinetic cell, the electrokinetic cell of electric automobile is to be formed by tandem compound by a lot of cells, because the performance of each cell there are differences, in the time discharging and recharging, indivedual batteries there will be the situation that overcharges or excessively put, thereby reduce the useful life of battery, therefore need battery equalization system to carry out equilibrium to cell tandem compound, cell tandem compound is being carried out after equilibrium, in addition cell tandem compound is carried out to transformation processing again, the needed electrical power storage of low-voltage electrical apparatus is in low pressure accumulator jar the most at last, adopt and obtain in this way low-voltage electric energy, need to connect battery equalization system and transformation system simultaneously, electric elements utilance is low, take too much inner space of vehicle.In addition, the mostly intelligent degree of battery equalization system adopting on electric automobile is at present lower, adopt the method for conductive discharge or switching capacity shunting to carry out power consumption to the higher cell of voltage, take power dissipation as means, cell tandem compound is carried out to equilibrium, there is waste greatly in the battery equalization system of adopting in this way, meanwhile, the electric energy of battery pack depends on the cell that performance is minimum, short-board effect is obvious, and the efficiency for charge-discharge of battery pack is had a greatly reduced quality.
Utility model content:
The utility model is in order to make up the deficiencies in the prior art, a kind of battery equalization system of electric automobile is provided, its reasonable in design, intelligent degree is high, can complete simultaneously to cell tandem compound is carried out equilibrium treatment and cell tandem compound carried out to the work of transformation processing, no longer need to connect in addition transformation system, improved the utilance of electric elements, saved inner space of vehicle; In the time that cell tandem compound is carried out to equilibrium, the mode that adopts energy to shift, no longer adopt the means of power dissipation, save the energy, each cell is independent provides electric energy to low pressure accumulator jar, not limited by the cell that electric energy is minimum, greatly improved the efficiency for charge-discharge of battery pack, solved problems of the prior art.
The utility model for solving the problems of the technologies described above adopted technical scheme is:
A kind of battery equalization system of electric automobile, comprise the battery pack of the cell composition of several series connection, one high voltage system and battery pack are in parallel, on high voltage system, be connected with high-voltage output line, on each cell, all a two-way electricity in parallel is isolated straight convertor, one battery balanced controller is connected with each two-way electricity isolation straight convertor and low pressure accumulator jar respectively by optical fiber, and each two-way electricity isolation straight convertor is connected with low pressure accumulator jar respectively by wire.
The utility model adopts such scheme, its reasonable in design, intelligent degree is high, a two-way electricity isolation straight convertor in parallel on each cell, battery balanced controller is connected with each two-way electricity isolation straight convertor with low pressure accumulator jar by optical fiber, battery balanced controller is by gathering the voltage of low pressure accumulator jar, and obtain the voltage of each cell by each two-way electricity isolation straight convertor, then cell is carried out to the extraction of electric energy according to the voltage of low pressure accumulator jar collecting and the each two-way electricity isolation straight convertor of the voltage control of each cell, electric energy offers low pressure accumulator jar and charges the most at last, complete at the same time to cell tandem compound is carried out equilibrium treatment and cell tandem compound carried out to the work of transformation processing, no longer need to connect in addition transformation system, improve the utilance of electric elements, save inner space of vehicle, in the time that cell tandem compound is carried out to equilibrium, adopt the mode of energy transfer, no longer adopt the means of power dissipation, save the energy, each cell is independent provides electric energy to low pressure accumulator jar, not limited by the cell that electric energy is minimum, has greatly improved the efficiency for charge-discharge of battery pack.
Accompanying drawing explanation:
Fig. 1 is structural representation of the present utility model.
In figure, 1, cell, 2, two-way electricity isolation straight convertor, 3, optical fiber, 4, low pressure accumulator jar.
Embodiment:
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.
As shown in Figure 1, a kind of battery equalization system of electric automobile, comprise the battery pack that the cell 1 of several series connection forms, one high voltage system and battery pack are in parallel, on high voltage system, be connected with high-voltage output line, the cell 1 of series connection is exported high voltage electric energy by high voltage system to power system of electric automobile, on each cell 1, all a two-way electricity in parallel is isolated straight convertor 2, one battery balanced controller is connected with each two-way electricity isolation straight convertor 3 and low pressure accumulator jar 4 respectively by optical fiber 3, each two-way electricity isolation straight convertor 3 is connected with low pressure accumulator jar 4 respectively by wire.
BT1, BT2 ... BTn is cell 1, DDC1, DDC2 ... DDCn is two-way electricity isolation straight convertor 2.
When work, battery balanced controller gathers the voltage data in low pressure accumulator jar 4, when 4 accumulation of energys of low pressure accumulator jar are discontented need to charge time, battery balanced controller collects the voltage data of corresponding cell 1 in battery balanced controller by optical fiber 2 by each two-way electricity isolation straight convertor 3, if the magnitude of voltage between each cell 1 there are differences, just illustrate that all cells 1 need equilibrium, battery balanced controller carries out analytic operation according to the voltage data of the cell 1 of the actual charging demand of low pressure accumulator jar 4 and collection and draws the control strategy of each cell 1 required equilibrium, then, battery balanced controller sends to each control strategy signal by optical fiber 3 the two-way electricity isolation straight convertor 2 of each cell 1 correspondence, the corresponding control strategy that each two-way electricity isolation straight convertor 2 is sent according to battery balanced controller extracts the corresponding electric energy of this cell 1 to offer low pressure accumulator jar 4, charge in demand meeting low pressure accumulator jar 4, realize balanced adjusting of electric energy between each cell 1, if each two-way electricity isolation straight convertor 2 is sent to the voltage data homogeneous phase while of the each cell 1 in battery balanced controller by optical fiber 3, just illustrate that each cell 1 in battery pack does not need equilibrium, now, battery balanced controller is formulated average balanced control strategy according to the actual charging demand of low pressure accumulator jar 4, and send this control strategy signal to the two-way electricity isolation straight convertor 2 of each cell 1 correspondence, all two-way electricity isolation straight convertors 2 are being received after this control strategy signal, extracting identical electric energy is that low pressure accumulator jar 4 charges.
Do not need charging when the electric energy in the low pressure accumulator jar 4 that battery balanced controller collects is full, and the voltage data that each two-way electricity isolation straight convertor 2 is sent to the each cell 1 in battery balanced controller by optical fiber 3 there are differences, while needing equilibrium, battery balanced controller according to the voltage data of each cell 1 by analysis computing draw the concrete control strategy of controlling each two-way electricity isolation straight convertor 2 and carry out transformation of electrical energy, battery balanced controller is sent to the concrete control strategy signal of transformation of electrical energy in the two-way electricity isolation straight convertor 2 of each correspondence by optical fiber 3, the concrete control strategy of the transformation of electrical energy that each two-way electricity isolation straight convertor 2 is sent according to battery balanced controller extracts corresponding corresponding cell 1 electric energy to offer low pressure accumulator jar 4, when low pressure accumulator jar 4 receives electric energy, this two-way electricity isolation straight convertor 2 extracts the electric energy needing again and adds in corresponding cell 1 from low pressure accumulator jar 4, reach the object of balanced each cell 1 electric energy with this.In this process, low pressure accumulator jar 4 does not charge, but by the mobile effect of playing balanced each cell 1 of electric energy.
Adopt battery equalization system of electric automobile of the present utility model, reasonable in design, intelligent degree is high, a two-way electricity isolation straight convertor 2 in parallel on each cell 1, battery balanced controller is connected with each two-way electricity isolation straight convertor 2 with low pressure accumulator jar 4 by optical fiber 3, battery balanced controller is by gathering the voltage of low pressure accumulator jar 4, and obtain the voltage of each cell 1 by each two-way electricity isolation straight convertor 2, then according to the voltage of low pressure accumulator jar 4 collecting and the each two-way electricity isolation straight convertor 2 of the voltage control of each cell 1, cell 1 is carried out to the extraction of electric energy, electric energy offers low pressure accumulator jar 4 and charges the most at last, complete at the same time to cell tandem compound is carried out equilibrium treatment and cell tandem compound carried out to the work of transformation processing, no longer need to connect in addition transformation system, improve the utilance of electric elements, save inner space of vehicle, in the time that cell tandem compound is carried out to equilibrium, the mode that adopts energy to shift, no longer adopt the means of power dissipation, save the energy, each cell 1 is independent provides electric energy to low pressure accumulator jar 4, not limited by the cell that electric energy is minimum, greatly improved the efficiency for charge-discharge of battery pack.
The utility model does not describe part in detail, is those skilled in the art of the present technique's known technology.
Claims (1)
1. a battery equalization system of electric automobile, it is characterized in that: the battery pack that comprises the cell composition of several series connection, one high voltage system and battery pack are in parallel, on high voltage system, be connected with high-voltage output line, on each cell, all a two-way electricity in parallel is isolated straight convertor, one battery balanced controller is connected with each two-way electricity isolation straight convertor and low pressure accumulator jar respectively by optical fiber, and each two-way electricity isolation straight convertor is connected with low pressure accumulator jar respectively by wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073041.9U CN203691028U (en) | 2014-02-19 | 2014-02-19 | Battery equalization system used for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073041.9U CN203691028U (en) | 2014-02-19 | 2014-02-19 | Battery equalization system used for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691028U true CN203691028U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420073041.9U Expired - Fee Related CN203691028U (en) | 2014-02-19 | 2014-02-19 | Battery equalization system used for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691028U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600780A (en) * | 2014-12-24 | 2015-05-06 | 山东新大洋电动车有限公司 | Vehicle-mounted power supply system for electric automobile |
| CN105576756A (en) * | 2016-01-17 | 2016-05-11 | 周虎 | Multi-voltage output power battery system |
| CN106230068A (en) * | 2016-08-31 | 2016-12-14 | 北京交通大学 | A kind of set of cells topological structure and forming method thereof |
| CN108349390A (en) * | 2015-11-04 | 2018-07-31 | 江森自控科技公司 | Integrated form string control unit system and method |
-
2014
- 2014-02-19 CN CN201420073041.9U patent/CN203691028U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600780A (en) * | 2014-12-24 | 2015-05-06 | 山东新大洋电动车有限公司 | Vehicle-mounted power supply system for electric automobile |
| CN108349390A (en) * | 2015-11-04 | 2018-07-31 | 江森自控科技公司 | Integrated form string control unit system and method |
| CN108349390B (en) * | 2015-11-04 | 2021-06-25 | Cps科技控股有限公司 | Integrated string control unit system and method |
| CN105576756A (en) * | 2016-01-17 | 2016-05-11 | 周虎 | Multi-voltage output power battery system |
| CN106230068A (en) * | 2016-08-31 | 2016-12-14 | 北京交通大学 | A kind of set of cells topological structure and forming method thereof |
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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: 20140702 Termination date: 20170219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |