CN105140992A - Battery electric quantity equalization system - Google Patents
Battery electric quantity equalization system Download PDFInfo
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- CN105140992A CN105140992A CN201510541884.6A CN201510541884A CN105140992A CN 105140992 A CN105140992 A CN 105140992A CN 201510541884 A CN201510541884 A CN 201510541884A CN 105140992 A CN105140992 A CN 105140992A
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- 238000004146 energy storage Methods 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 17
- 230000005059 dormancy Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Abstract
Provided is a battery electric quantity equalization system, characterized by comprising a battery pack composed of N (N is a positive integer no less than two) battery units in series connection, (N-1) equalization units arranged between adjacent battery units, and (N-1) control units used for controlling the opening or closing of the equalization units. Each equalization unit is composed of an equalization element and a switch set arranged between adjacent tandem connection battery units. When detecting that the electric quantity difference between adjacent batteries reaches a limit value, the control units drive the switch set to start the equalization elements to take effect on a loop, and to perform equalization treatment on adjacent battery units. Each control unit is composed of an oscillator and a logic driving piece, and is arranged between adjacent battery units. The battery electric quantity equalization system has the characteristics of good equalization effect, simple structure and low production cost, and is convenient for popularization.
Description
Technical field
The present invention relates to a kind of battery electric quantity equalizing system, belong to battery protection and efficiency utilization field.
Background technology
The battery applications that can repeat discharge and recharge is more and more wider, can predict electric automobile in the future will extensively by popular favor, but this kind of battery is but because produce, and uncontrollable always to there will be quality inconsistent, as inconsistent in the internal resistance of cell, battery capacity, or it is less just to have started difference, after using a period of time, some battery starts capacity decline gradually or internal resistance increase, even loses efficacy.If neither one better battery equilibrium discharge and recharge scheme will have a strong impact on useful life and the effect of battery.
Solution of the above problems is mainly divided into two kinds, and one is loss-type, and one is lossless type; Loss-type mainly utilizes resistance to be consumed by the electricity had more in the battery unit of high electricity, although can reach certain portfolio effect, yield poor results, ability is very limited, also there is wooden barrel short-board effect, this kind of scheme is not suitable for large-capacity battery pack.The scheme of lossless type generally adopts transformer, MOS switching tube as balanced energy-storage travelling wave tube, and volume is comparatively large, cost is higher, circuit framework relative or complexity, simultaneously because be transformer, also there is coupling loss.Therefore, design a transformer that do not use as balanced energy-storage travelling wave tube, without battery number restriction, without kwh loss, and the equalizing system that structure is more simple, cost is more cheap is particularly urgent.
Summary of the invention
For the deficiency of above-mentioned technology, the invention provides a kind of structure simple, be convenient to the battery electric quantity equalizing system promoted, production cost is low.
Battery electric quantity equalizing system, is characterized in that: comprise one by N save (N be more than or equal to two positive integer) battery pack of battery cells in series, N-1 be arranged on balanced unit between adjacent cell, N-1 for controlling the control unit that balanced unit starts or closes;
Described balanced unit is made up of the balanced energy-storage travelling wave tube be arranged between adjacent serial connection battery unit and a switches set, when the control unit electricity difference detected between connected battery reaches limit value, control unit drives described switches set to start balanced energy-storage travelling wave tube and acts on loop, carries out equilibrium treatment to adjacent cell;
Described control unit is made up of oscillator and logical drive, and is arranged between adjacent cell, when the voltage between adjacent cell is consistent, and described oscillator dormancy; When between adjacent cell, the difference of voltage reaches limit value, described oscillator starting, and drive described switches set to control startup or the closedown of balanced energy-storage travelling wave tube.
Further, described balanced energy-storage travelling wave tube is electric capacity or inductance.
Further, when using electric capacity as balanced energy-storage travelling wave tube, the quantity that switches set arranges switch is four; When using inductance as balanced energy-storage travelling wave tube, the quantity that switches set arranges switch is two.
Further, when using electric capacity as balanced energy-storage travelling wave tube, switch S 1, switch S 2, switch S 3, switch S 4 are set, one end of electric capacity connects positive pole, the negative pole of battery unit B1 respectively by switch S 1, switch S 2, the other end connects positive pole, the negative pole of battery unit B2 respectively by switch S 3, switch S 4, and the tie point of switch S 2, switch S 3 is connected with the tie point of battery unit B1, battery unit B2;
The electricity difference detected between B1, B2 as control unit reaches limit value, and switch S 2, switch S 4 disconnect, switch S 1, switch S 3 conducting, duration half period; Switch S 1, switch S 3 disconnect afterwards, switch S 2, switch S 4 conducting, duration half period; If the electricity ratio battery unit B2 of battery unit B1 is high, when switch S 1, switch S 3 conducting, battery unit B1 charges to electric capacity C1, and when switch S 2, switch S 4 conducting, electric capacity C1 discharges to cell device B2; If the electricity ratio cell device B1 of cell device B2 is high, when switch S 2, switch S 4 conducting, cell device B2 charges to electric capacity C1, and when switch S 1, switch S 3 conducting, electric capacity C1 discharges to cell device B1.
Further, when using inductance as balanced energy-storage travelling wave tube, arrange switch S 1, switch S 2, one end of inductance connects the positive pole of the negative pole of battery unit B1, battery unit B2 respectively, and the other end connects the positive pole of battery unit B1, the negative pole of battery unit B2 respectively by switch S 1, switch S 2;
Switch S 1 and switch S 2 alternate conduction, duty ratio 50: 50; Switch S 2 disconnects, switch S 1 conducting, and on inductance, i0 end is negative, and i1 end is just; Switch S 1 disconnects, and S2 closes, and on inductance, i0 end is just, i1 end is negative, completes one-period, goes round and begins again, thus make the electricity on battery unit B1, battery unit B2 equal.
Further, described switch is MOS switch.
Portfolio effect of the present invention is good, structure simple, production cost is lower, be convenient to popularization.
Accompanying drawing explanation
Accompanying drawing 1 is the topological diagram of battery electric quantity equalizing system disclosed in this invention;
Accompanying drawing 2 is equalizing system circuit topology figure when balanced energy-storage travelling wave tube selects electric capacity in battery electric quantity equalizing system disclosed in this invention;
Accompanying drawing 3 is equalizing system circuit topology figure when balanced energy-storage travelling wave tube selects inductance in battery electric quantity equalizing system disclosed in this invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, a kind of battery electric quantity equalizing system disclosed in this invention is further explained.
A kind of battery electric quantity equalizing system as shown in Figure 1, comprise one by N save (N be more than or equal to two positive integer) battery unit the B battery pack, the N-1 that are in series to be arranged between adjacent cell balanced unit M, N-1 for controlling the control unit that balanced unit M starts or closes;
Described balanced unit M is made up of the balanced energy-storage travelling wave tube be arranged between adjacent serial connection battery unit B and a switches set, when the control unit electricity difference detected between connected battery unit B reaches limit value, control unit drives described switches set to start balanced energy-storage travelling wave tube and acts on loop, carries out equilibrium treatment to adjacent cell B;
Described control unit is made up of oscillator and logical drive, and is arranged between adjacent cell B, when the voltage between adjacent cell B is consistent, and described oscillator dormancy; When between adjacent cell B, the difference of voltage reaches limit value, described oscillator starting, and drive described switches set to control startup or the closedown of balanced energy-storage travelling wave tube.
The balanced unit of a kind of battery electric quantity equalizing system as shown in Figure 2, switch S 1, switch S 2, switch S 3, switch S 4 are set, one end of electric capacity C1 connects positive pole, the negative pole of battery unit B1 respectively by switch S 1, switch S 2, the other end connects positive pole, the negative pole of battery unit B2 respectively by switch S 3, switch S 4, and the tie point of switch S 2, switch S 3 is connected with the tie point of battery unit B1, battery unit B2;
The electricity difference detected between B1, B2 as control unit reaches limit value, and switch S 2, switch S 4 disconnect, switch S 1, switch S 3 conducting, duration half period; Switch S 1, switch S 3 disconnect afterwards, switch S 2, switch S 4 conducting, duration half period; If the electricity ratio battery unit B2 of battery unit B1 is high, when switch S 1, switch S 3 conducting, battery unit B1 charges to electric capacity C1, and when switch S 2, switch S 4 conducting, electric capacity C1 discharges to cell device B2; If the electricity ratio cell device B1 of cell device B2 is high, when switch S 2, switch S 4 conducting, cell device B2 charges to electric capacity C1, and when switch S 1, switch S 3 conducting, electric capacity C1 discharges to cell device B1.
The balanced unit of a kind of battery electric quantity equalizing system as shown in Figure 3, switch S 1, switch S 2 are set, one end of inductance connects the negative pole of battery unit B1, the positive pole of battery unit B2 respectively, and the other end connects the positive pole of battery unit B1, the negative pole of battery unit B2 respectively by switch S 1, switch S 2;
Switch S 1 and switch S 2 alternate conduction, duty ratio 50: 50; Switch S 2 disconnects, switch S 1 conducting, and on inductance, i0 end is negative, and i1 end is just; Switch S 1 disconnects, S2 conducting, and on inductance, i0 end is just, i1 end is negative, completes one-period, goes round and begins again, thus make the electricity on battery unit B1, battery unit B2 equal.Duty ratio 50: 50 refers to theoretical value, is duty ratio 50: 50, suitably can regulates duty ratio in practical application when balanced balanced current is less, with compensating MOS switching tube, inductance internal resistance loss, or regulates or current limliting for balanced balanced current.
Described switch is MOS switch.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (6)
1. battery electric quantity equalizing system, is characterized in that: comprise one by N save (N be more than or equal to two positive integer) battery pack of battery cells in series, N-1 be arranged on balanced unit between adjacent cell, N-1 for controlling the control unit that balanced unit starts or closes;
Described balanced unit is made up of the balanced energy-storage travelling wave tube be arranged between adjacent serial connection battery unit and a switches set, when the control unit electricity difference detected between connected battery unit reaches limit value, control unit drives described switches set to start balanced energy-storage travelling wave tube and acts on loop, carries out equilibrium treatment to adjacent cell;
Described control unit is made up of oscillator and logical drive, and is arranged between adjacent cell, when the voltage between adjacent cell is consistent, and described oscillator dormancy; When between adjacent cell, the difference of voltage reaches limit value, described oscillator starting, and drive described switches set to control startup or the closedown of balanced energy-storage travelling wave tube.
2. battery electric quantity equalizing system according to claim 1, is characterized in that: described balanced energy-storage travelling wave tube is electric capacity or inductance.
3. battery electric quantity equalizing system according to claim 2, is characterized in that: when using electric capacity as balanced energy-storage travelling wave tube, and the quantity that switches set arranges switch is four; When using inductance as balanced energy-storage travelling wave tube, the quantity that switches set arranges switch is two.
4. battery electric quantity equalizing system according to claim 3, it is characterized in that: when using electric capacity as balanced energy-storage travelling wave tube, switch S 1, switch S 2, switch S 3, switch S 4 are set, one end of electric capacity connects positive pole, the negative pole of battery unit B1 respectively by switch S 1, switch S 2, the other end connects positive pole, the negative pole of battery unit B2 respectively by switch S 3, switch S 4, and the tie point of switch S 2, switch S 3 is connected with the tie point of battery unit B1, battery unit B2;
The electricity difference detected between B1, B2 as control unit reaches limit value, and switch S 2, switch S 4 disconnect, switch S 1, switch S 3 conducting, duration half period; Switch S 1, switch S 3 disconnect afterwards, switch S 2, switch S 4 conducting, duration half period; If the electricity ratio battery unit B2 of battery unit B1 is high, when switch S 1, switch S 3 conducting, battery unit B1 charges to electric capacity C1, and when switch S 2, switch S 4 conducting, electric capacity C1 discharges to cell device B2; If the electricity ratio cell device B1 of cell device B2 is high, when switch S 2, switch S 4 conducting, cell device B2 charges to electric capacity C1, and when switch S 1, switch S 3 conducting, electric capacity C1 discharges to cell device B1.
5. battery electric quantity equalizing system according to claim 2, it is characterized in that: when using inductance as balanced energy-storage travelling wave tube, switch S 1, switch S 2 are set, one end of inductance connects the negative pole of battery unit B1, the positive pole of battery unit B2 respectively, and the other end connects the positive pole of battery unit B1, the negative pole of battery unit B2 respectively by switch S 1, switch S 2;
Switch S 1 and switch S 2 alternate conduction, duty ratio 50: 50; Switch S 2 disconnects, switch S 1 conducting, and on inductance, i0 end is negative, and i1 end is just; Switch S 1 disconnects, S2 conducting, and on inductance, i0 end is just, i1 end is negative, completes one-period, goes round and begins again, thus make the electricity on battery unit B1, battery unit B2 equal.
6. battery electric quantity equalizing system according to claim 3, is characterized in that: described switch is MOS switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510541884.6A CN105140992A (en) | 2015-08-31 | 2015-08-31 | Battery electric quantity equalization system |
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| CN201510541884.6A CN105140992A (en) | 2015-08-31 | 2015-08-31 | Battery electric quantity equalization system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762873A (en) * | 2016-04-08 | 2016-07-13 | 珠海思齐电动汽车设备有限公司 | Battery management system for lithium battery pack |
| CN107086632A (en) * | 2017-05-26 | 2017-08-22 | 泉州华威国维电子科技有限公司 | A kind of battery |
| CN108183529A (en) * | 2018-02-08 | 2018-06-19 | 福建省万华电子科技有限公司 | The intercom lithium battery and its equalization methods of a kind of fast uniform |
| CN110299745A (en) * | 2019-07-09 | 2019-10-01 | 广东工业大学 | A kind of functional balanced circuit and correlation technique towards restructural battery pack |
| CN110682831A (en) * | 2018-06-19 | 2020-01-14 | 广州汽车集团股份有限公司 | Vehicle-mounted power battery equalization method and device and automobile |
| EP3984829A4 (en) * | 2019-06-11 | 2023-06-07 | Imasen Electric Industrial Co., Ltd. | HIGH VOLTAGE POWER SUPPLY |
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| JP2009153233A (en) * | 2007-12-18 | 2009-07-09 | Toshiba Corp | Stored power amount equalizer for battery packs |
| US20130076309A1 (en) * | 2011-09-23 | 2013-03-28 | Linear Technology Corporation | Stackable bi-directional multicell battery balancer |
| CN103094933A (en) * | 2011-10-28 | 2013-05-08 | 东莞钜威新能源有限公司 | A battery equalization circuit and MOS tube switch circuit |
| CN103280861A (en) * | 2013-06-04 | 2013-09-04 | 奇瑞汽车股份有限公司 | Battery electric quantity equalizing circuit |
-
2015
- 2015-08-31 CN CN201510541884.6A patent/CN105140992A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009153233A (en) * | 2007-12-18 | 2009-07-09 | Toshiba Corp | Stored power amount equalizer for battery packs |
| US20130076309A1 (en) * | 2011-09-23 | 2013-03-28 | Linear Technology Corporation | Stackable bi-directional multicell battery balancer |
| CN103094933A (en) * | 2011-10-28 | 2013-05-08 | 东莞钜威新能源有限公司 | A battery equalization circuit and MOS tube switch circuit |
| CN103280861A (en) * | 2013-06-04 | 2013-09-04 | 奇瑞汽车股份有限公司 | Battery electric quantity equalizing circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762873A (en) * | 2016-04-08 | 2016-07-13 | 珠海思齐电动汽车设备有限公司 | Battery management system for lithium battery pack |
| CN107086632A (en) * | 2017-05-26 | 2017-08-22 | 泉州华威国维电子科技有限公司 | A kind of battery |
| CN107086632B (en) * | 2017-05-26 | 2023-04-25 | 泉州华威国维电子科技有限公司 | Battery cell |
| CN108183529A (en) * | 2018-02-08 | 2018-06-19 | 福建省万华电子科技有限公司 | The intercom lithium battery and its equalization methods of a kind of fast uniform |
| CN110682831A (en) * | 2018-06-19 | 2020-01-14 | 广州汽车集团股份有限公司 | Vehicle-mounted power battery equalization method and device and automobile |
| EP3984829A4 (en) * | 2019-06-11 | 2023-06-07 | Imasen Electric Industrial Co., Ltd. | HIGH VOLTAGE POWER SUPPLY |
| CN110299745A (en) * | 2019-07-09 | 2019-10-01 | 广东工业大学 | A kind of functional balanced circuit and correlation technique towards restructural battery pack |
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