CN106877416A - A kind of equalizaing charge control method of Vehicular accumulator cell - Google Patents
A kind of equalizaing charge control method of Vehicular accumulator cell Download PDFInfo
- Publication number
- CN106877416A CN106877416A CN201510915009.XA CN201510915009A CN106877416A CN 106877416 A CN106877416 A CN 106877416A CN 201510915009 A CN201510915009 A CN 201510915009A CN 106877416 A CN106877416 A CN 106877416A
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- Prior art keywords
- cell
- battery
- charging
- charge control
- control method
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
Abstract
The invention discloses a kind of equalizaing charge control method of Vehicular accumulator cell, including charger, three parts of balancing control circuit and series battery.Charging strategy of the invention can greatly improve the charge efficiency of battery, while the charging interval can be shortened.And, because the charging current of cell can be modified automatically according to the balanced situation of battery, with the carrying out of charging process, the voltage differences of cell constantly reduce, and after charging the phase reach good portfolio effect, battery pack quick charge can either be realized, it is inconsistent to battery cyclic aging effects to eliminate cell again, realizes equalizaing charge control.
Description
Technical field
The present invention relates to a kind of Vehicular accumulator cell, more particularly to a kind of Vehicular accumulator cell equalizaing charge control method.
Background technology
Cell is used in series the output voltage that can improve battery pack, used in parallel to be obtained in that bigger battery capacity.In Prospect of EVS Powered with Batteries group, improve battery pack output voltage can lifting system efficiency, so as to reduce the totle drilling cost of electric automobile.Because the voltage of cell is low and finite capacity, therefore, generally used in vapour Vehicular dynamic battery so as to obtain the method for high voltage large capcity battery pack by using some cell connection in series-parallel.
It is inconsistent due to existing on material and technique in cell production process, even across strict screening combo when dispatching from the factory, some subtle differences are still present between cell.During series battery use, because the electric current for flowing through each cell is identical, the difference of cell can constantly be exaggerated in use, and the small cell of capacity can first fill full when charging, so that gassing can be occurred because of overcharge；And the big cell of capacity then can therefore and charge less is electric, cause catalytic activity to reduce, hydraulic performance decline.In the course of time, the cell of poor-performing will turn into behindhand battery.In use, these fall behind cell not only can seriously overcharge and charge less electricity, in some instances it may even be possible to discharge when there is reversely charging electrical phenomena, so as to accelerate the rate of decay of whole battery pack and cause its premature failure.
At present, electrokinetic cell is a principal element for limiting electric vehicle industrialization development, and battery management system can effectively monitor battery pack, makes electrokinetic cell that the efficiency of maximum is played in complicated use environment, and the popularization to electric automobile is significant.
The content of the invention
In order to overcome, battery charging is unbalanced to cause the problem of the lost of life, the present invention to propose a kind of equalizaing charge control method of Vehicular accumulator cell.
The technical solution adopted for the present invention to solve the technical problems is：
The reason for by analyzing battery pack premature failure, circuit is controlled for dissipative equalization, further investigate the circuit model of battery pack balancing charge control, and propose that one kind can either realize battery pack quick charge on this basis, the inconsistent equalizaing charge control method to battery cyclic aging effects of cell can be eliminated again.
The equalizaing charge control method of Vehicular accumulator cell includes：Charger, three parts of balancing control circuit and series battery.
The charger, according to the different charged state of battery pack, exports a given charging current in charging process.
The state parameter such as the voltage of all monomers, electric current and temperature in the balancing control circuit monitoring battery pack, and the charged state and its output current of charger are determined according to the SOC of each cell in battery pack.
The series battery passes through balancing control circuit so that each cell can be charged in a balanced way.
The beneficial effects of the invention are as follows：Because the charging current of cell can be modified automatically according to the balanced situation of battery, with the carrying out of charging process, the voltage differences of cell constantly reduce, and after charging the phase reach good portfolio effect, battery pack quick charge can either be realized, cell can be eliminated again inconsistent to battery cyclic aging effects, realize equalizaing charge control.Meanwhile, charging strategy of the invention can greatly improve the charge efficiency of battery, while the charging interval can be shortened.
Brief description of the drawings
Fig. 1 equalizaing charge control systems.
Fig. 2 dissipative equalization circuits.
Fig. 3 equalizaing charge control systems.
Specific embodiment
In Fig. 1, in charging process, according to the different charged state of battery pack, charger exports a given charging current；The state parameter such as the voltage of all monomers, electric current and temperature in balancing control circuit monitoring battery pack, and the charged state and its output current of charger are determined according to the SOC of each cell in battery pack；Meanwhile, balancing control circuit adjusts the charging current of cell by corresponding control strategy, and all cells are charged in a balanced way in making battery pack.
In Fig. 2, battery pack is composed in series by N cell, there is provided an output voltage higher.It is charging current in figure, the voltage of N cell be respectively Ub1, Ub2 ..., Ubn, each cell has 1 Balance route unit being made up of equalizer switch Si and equalizing resistance to correspond to therewith, the charging current and euqalizing current of the cell be respectively and.All equalizing resistance Ri use identical resistance, i.e. R1, R2 ... Rn=R.When i-th equalizer switch Si of cell is turned on, the electric current flowed through on its corresponding equalizing resistance.In charging process, equalizer switch Si is driven by pwm signal, and its dutycycle is adjusted by balancing control circuit according to corresponding charge control strategy.
In Fig. 3, whole system can be divided into charger and the part of equalizing circuit 2.The N number of balanced unit and control strategy that wherein equalizing circuit can be divided into corresponding to cell shown in inframe part, again dashed lines realize unit two large divisions.Control strategy realizes that the realization comprising charge control strategy and Balance route strategy realize two aspects again.
Charging uses three stage charging system, using first constant-current charge, then constant-voltage charge, last floating charge, altogether with quick charge, supply charging and 3 stages of trickle charge.In the quick charge stage, battery is charged using high current constant current to recover battery electric energy rapidly, now cell voltage is relatively low.When terminating in the quick charge stage, battery capacity is not completely filled with, and cell voltage is of a relatively high, now maintains charging voltage invariable, charges with entering and supplies the charging stage, and exponentially rule declines charging current.After battery temperature over-limit condition is detected or charging current reduces to a certain extent, into the trickle charge stage, using smaller electric current charge and terminate until charging.
Claims (4)
1. the equalizaing charge control method of a kind of Vehicular accumulator cell, it is characterised in that：Including charger, three parts of balancing control circuit and series battery.
2. the equalizaing charge control method of Vehicular accumulator cell as claimed in claim 1, it is characterised in that the charger, according to the different charged state of battery pack, exports a given charging current in charging process.
3. the equalizaing charge control method of Vehicular accumulator cell as claimed in claim 1, it is characterised in that the state parameter such as the voltage of all monomers, electric current and temperature in the balancing control circuit monitoring battery pack, and determine the charged state and its output current of charger.
4. the equalizaing charge control method of Vehicular accumulator cell as claimed in claim 1, it is characterised in that the series battery passes through balancing control circuit so that each cell can be charged in a balanced way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915009.XA CN106877416A (en) | 2015-12-14 | 2015-12-14 | A kind of equalizaing charge control method of Vehicular accumulator cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915009.XA CN106877416A (en) | 2015-12-14 | 2015-12-14 | A kind of equalizaing charge control method of Vehicular accumulator cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106877416A true CN106877416A (en) | 2017-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510915009.XA Pending CN106877416A (en) | 2015-12-14 | 2015-12-14 | A kind of equalizaing charge control method of Vehicular accumulator cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654268A (en) * | 2019-10-12 | 2020-01-07 | 中车资阳机车有限公司 | Ultra-high-power battery equalizing charging circuit for locomotive and control management method |
| CN112054565A (en) * | 2019-06-06 | 2020-12-08 | 加百裕工业股份有限公司 | Battery management system and method |
| CN117559614A (en) * | 2024-01-11 | 2024-02-13 | 西安奇点能源股份有限公司 | Charging and discharging balance control method for serial battery PACK |
-
2015
- 2015-12-14 CN CN201510915009.XA patent/CN106877416A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054565A (en) * | 2019-06-06 | 2020-12-08 | 加百裕工业股份有限公司 | Battery management system and method |
| CN110654268A (en) * | 2019-10-12 | 2020-01-07 | 中车资阳机车有限公司 | Ultra-high-power battery equalizing charging circuit for locomotive and control management method |
| CN110654268B (en) * | 2019-10-12 | 2023-10-27 | 中车资阳机车有限公司 | Equalizing charge control management method for super-power battery for locomotive |
| CN117559614A (en) * | 2024-01-11 | 2024-02-13 | 西安奇点能源股份有限公司 | Charging and discharging balance control method for serial battery PACK |
| CN117559614B (en) * | 2024-01-11 | 2024-04-02 | 西安奇点能源股份有限公司 | Charging and discharging balance control method for serial battery PACK |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |
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| WD01 | Invention patent application deemed withdrawn after publication |