CN202424211U - Battery power equalization circuit and battery system - Google Patents
Battery power equalization circuit and battery system Download PDFInfo
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- CN202424211U CN202424211U CN2011204876859U CN201120487685U CN202424211U CN 202424211 U CN202424211 U CN 202424211U CN 2011204876859 U CN2011204876859 U CN 2011204876859U CN 201120487685 U CN201120487685 U CN 201120487685U CN 202424211 U CN202424211 U CN 202424211U
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Abstract
The utility model discloses a battery system which comprises a plurality of batteries, a plurality of capacitors, a first switch system and a second switch system, wherein the plurality of capacitors are respectively corresponding to a battery; each capacitor is connected in parallel with a corresponding battery through the first switch system respectively; and the plurality of capacitors are connected in parallel through the second switch system. The utility model further discloses a battery power equalization circuit. In such a manner, the battery power equalization circuit and battery system provided by the utility model carry out power equalization on the plurality of batteries by using the plurality of capacitors under the control of the switch systems, and can still keep a lower energy loss on large capacity and high voltage occasions, thus having the advantages of low energy consumption and high efficiency.
Description
Technical field
The present invention relates to the battery technology field, particularly relate to a kind of battery electric quantity equalizing circuit and battery system.
Background technology
Electric automobile power battery generally forms by the more piece larger capacity batteries is monomer series-connected at present; The operating voltage of each monomer, actual capacity are all consistent in the ideal battery group; But actual battery pack is difficult to keep all battery cells in full accord when dispatching from the factory; And along with the increase of battery set charge/discharge number of times, the inconsistency of battery cell will increase gradually in the battery pack.Research shows; In process of production, the problem of technology and material makes active material between the battery, barrier film, electrolyte etc. have fine difference, in the battery set charge/discharge process; Capacity monomer little or that internal resistance is high is easy to generate overshoot, crosses and put; And the bigger monomer of capacity is easy to generate to owe to fill and owes to put, and causes inconsistent, promptly unbalanced between battery cell more.
In continuous charge and discharge cycles, the unbalanced phenomena of battery pack further strengthens, and gets into vicious circle.In power battery pack is used; Owing to there be " wooden barrel effect "; The characteristic that is battery pack is by the poorest battery decision; One group is to discharge and recharge the battery pack that the battery cell in life-span is formed for 2500 times by the life-span, when having balanced control and charging fully, does not have under the situation about overcharging, and has only actual life 300 times.The lack of uniformity of battery will directly cause the battery pack lost of life, insecurity to increase, and make electrokinetic cell consist of the bottleneck of electrical automobile industrialization, the marketization.
Its extensive use of the big limitations of the unbalanced problem of capacity when using just because of the series connection of lithium-ion-power cell group, thereby the adding equalizing circuit is effective solution.Especially for jumbo lithium battery group, cost an arm and a leg, need equalizing circuit and balance policy effectively reliably especially.
The research of equalizing circuit is along with being widely used of battery started to walk for a long time; Battery circuit equalization methods of the prior art mainly utilizes shunt resistance to carry out; This method is simple and reliable, is industrial quarters equalization methods commonly used, therefore; In the application scenario of low capacity, low-voltage, resistance shunt method is because simple, the with low cost scheme that becomes main flow of its realization.
But resistance shunt method of the prior art is because employing resistance carries out the electric weight equilibrium, so energy consumption is very big, obviously has the lower shortcoming of efficient, and in big capacity, high-tension occasion, resistance shunt method obviously is worthless.
Therefore, need badly and provide a kind of battery electric quantity equalizing circuit and battery system to address the above problem.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of battery electric quantity equalizing circuit and battery system, to address the above problem.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of battery system is provided, comprises: a plurality of batteries; A plurality of electric capacity correspond respectively to a battery; First switching system is connected in parallel each electric capacity respectively with corresponding battery; The second switch system is connected in parallel a plurality of electric capacity.
Wherein, First switching system comprises a plurality of first switches and a plurality of second switch; Each first switch and each second switch correspond respectively to a battery and an electric capacity; First pole plate of the positive pole that each first switch selectivity connects corresponding battery and corresponding electric capacity, second pole plate of the negative pole of the battery of each second switch selectivity connection correspondence and corresponding electric capacity.
Wherein, First end of each first switch connects the positive pole of corresponding battery; Second end of each first switch connects first pole plate of corresponding electric capacity, and first end of each second switch connects the negative pole of corresponding battery, and second end of each second switch connects second pole plate of corresponding electric capacity.
Wherein, The second switch system comprises a plurality of the 3rd switches and a plurality of the 4th switch; Each the 3rd switch and each the 4th switch be corresponding to an electric capacity, and first end of each the 3rd switch connects with first pole plate of corresponding electric capacity, second pole plate connection of first end of each the 4th switch and corresponding electric capacity; And second end of a plurality of the 3rd switches interconnects, and second end of a plurality of the 4th switches interconnects.
Wherein, closed at first switch and second switch, and when the 3rd switch and the 4th switch opens, battery is connected in parallel with corresponding electric capacity, opens at first switch and second switch, and when the 3rd switch and the 4th switch closure, electric capacity is connected in parallel.
For solving the problems of the technologies described above, the another one technical scheme that the present invention adopts is: a kind of battery electric quantity equalizing circuit is provided, is used for a plurality of batteries are carried out the electric weight equilibrium, balancer comprises: a plurality of electric capacity correspond respectively to a battery; First switching system is connected in parallel each electric capacity respectively with corresponding battery; The second switch system is connected in parallel a plurality of electric capacity.
Wherein, First switching system comprises a plurality of first switches and a plurality of second switch; Each first switch and each second switch correspond respectively to a battery and an electric capacity; First pole plate of the positive pole that each first switch selectivity connects corresponding battery and corresponding electric capacity, second pole plate of the negative pole of the battery of each second switch selectivity connection correspondence and corresponding electric capacity.
Wherein, First end of each first switch connects the positive pole of corresponding battery; Second end of each first switch connects first pole plate of corresponding electric capacity, and first end of each second switch connects the negative pole of corresponding battery, and second end of each second switch connects second pole plate of corresponding electric capacity.
Wherein, The second switch system comprises a plurality of the 3rd switches and a plurality of the 4th switch; Each the 3rd switch and each the 4th switch be corresponding to an electric capacity, and first end of each the 3rd switch connects with first pole plate of corresponding electric capacity, second pole plate connection of first end of each the 4th switch and corresponding electric capacity; And second end of a plurality of the 3rd switches interconnects, and second end of a plurality of the 4th switches interconnects.
Wherein, closed at first switch and second switch, and when the 3rd switch and the 4th switch opens, battery is connected in parallel with corresponding electric capacity, opens at first switch and second switch, and when the 3rd switch and the 4th switch closure, electric capacity is connected in parallel.
The invention has the beneficial effects as follows: be different from prior art; Battery electric quantity equalizing circuit provided by the present invention and battery system utilize a plurality of electric capacity under the control of switching system, a plurality of batteries to be carried out the electric weight equilibrium; Can under big capacity, high-tension occasion, still keep lower energy loss, have low energy consumption, high efficiency advantage.
Description of drawings
Fig. 1 is the electrical block diagram according to the battery system of the embodiment of the invention.
Embodiment
See also Fig. 1, Fig. 1 is the electrical block diagram according to the battery system of the embodiment of the invention.
As shown in Figure 1, the battery system according to the embodiment of the invention comprises: a plurality of battery 101,102,103, a plurality of electric capacity 104,105,106, first switching system 120 and second switch system 130.Wherein a plurality of electric capacity 104,105,106 correspond respectively to battery 101,102,103.First switching system 120 is connected in parallel each electric capacity 104,105,106 respectively with corresponding battery 101,102,103; Second switch system 130 is connected in parallel a plurality of electric capacity 104,105,106.
It should be noted that as shown in Figure 1ly, a plurality of batteries 101,102,103 are connected in series; But it is merely one of the present invention preferred implementation, in other embodiments of the invention; Modes such as a plurality of batteries can parallel connection, series-parallel connection connect, and the present invention does not do concrete qualification to this.
Wherein, first switching system 120 comprises a plurality of first switches 107,108,109 and a plurality of second switch 110,111,112, and second switch system 130 comprises a plurality of the 3rd switches 113,114,115 and a plurality of the 4th switch 116,117,118.
Particularly; First switch 107 and second switch 110 are corresponding to battery 101 and electric capacity 104; First switch, the 107 alternative positive pole 1011 of battery 101 and first pole plates 1041 of electric capacity 104 of connecting, the second switch 110 alternative negative pole 1012 of battery 101 and second pole plates 1042 of electric capacity 104 of connecting.Wherein, First end 1071 of first switch 107 connects the positive pole 1011 of battery 101; Second end 1072 of first switch 107 connects first pole plate 1041 of electric capacity 104; First end 1101 of second switch 110 connects the negative pole 1012 of battery 101, and second end 1102 of second switch 110 connects second pole plate 1042 of electric capacity 104.The 3rd switch 113 and the 4th switch 116 are corresponding to electric capacity 104, and wherein first end 1131 of the 3rd switch 113 is connected with first pole plate 1041 of electric capacity 104, and first end 1161 of the 4th switch 116 is connected with second pole plate 1042 of electric capacity 104.
In like manner; First switch 108 and second switch 111 are corresponding to battery 102 and electric capacity 105; First switch, the 108 alternative positive pole 1021 of battery 102 and first pole plates 1051 of electric capacity 105 of connecting, the second switch 111 alternative negative pole 1022 of battery 102 and second pole plates 1052 of electric capacity 105 of connecting.Wherein, First end 1081 of first switch 108 connects the positive pole 1021 of battery 102; Second end 1082 of first switch 108 connects first pole plate 1051 of electric capacity 105; First end 1111 of second switch 111 connects the negative pole 1022 of battery 102, and second end 1112 of second switch 111 connects second pole plate 1052 of electric capacity 105.The 3rd switch 114 and the 4th switch 117 are corresponding to electric capacity 105, and wherein first end 1141 of the 3rd switch 114 is connected with first pole plate 1051 of electric capacity 105, and first end 1171 of the 4th switch 117 is connected with second pole plate 1052 of electric capacity 105.
First switch 109 and second switch 112 are corresponding to battery 103 and electric capacity 106; First switch, the 109 alternative positive pole 1031 of battery 103 and first pole plates 1061 of electric capacity 106 of connecting, the second switch 112 alternative negative pole 1032 of battery 103 and second pole plates 1062 of electric capacity 106 of connecting.Wherein, First end 1091 of first switch 109 connects the positive pole 1031 of battery 103; Second end 1092 of first switch 109 connects first pole plate 1061 of electric capacity 106; First end 1121 of second switch 112 connects the negative pole 1032 of battery 103, and second end 1122 of second switch 112 connects second pole plate 1062 of electric capacity 106.The 3rd switch 115 and the 4th switch 118 are corresponding to electric capacity 106, and wherein first end 1151 of the 3rd switch 115 is connected with first pole plate 1061 of electric capacity 106, and first end 1181 of the 4th switch 118 is connected with second pole plate 1062 of electric capacity 106.
In addition; Second end 1132 of the 3rd switch 113, second end 1142 of the 3rd switch 114 and second end 1152 of the 3rd switch 115 interconnect, and second end 1162 of the 4th switch 116, second end 1172 of the 4th switch 117 and second end 1182 of the 4th switch 118 interconnect.
Therefore; After the system start-up; When first switch 107,108,109 and second switch 110,111,112 closures, when the 3rd switch 113,114,115 and the 4th switch 116,117,118 were opened, battery 101 was parallelly connected with electric capacity 104; Battery 102 is parallelly connected with electric capacity 105, and battery 103 is parallelly connected with electric capacity 106.At this moment, battery 101 can be to electric capacity 104 chargings, 105 chargings of 102 pairs of electric capacity of battery, and 106 chargings of 103 pairs of electric capacity of battery make a part of electric weight of battery 101,102,103 transfer to electric capacity 104,105,106 respectively.
When first switch 107,108,109 and second switch 110,111,112 are opened; When the 3rd switch 113,114,115 and the 4th switch 116,117,118 are closed, electric capacity 104,105, be connected in parallel respectively between 106, form parallel-capacitor circuit; In parallel-capacitor circuit; If electric capacity 104,105, the electric weight between 106 are unequal, the electric weight migration then can take place, shift electric weight from the electric capacity that stores big electric weight to the electric capacity that stores little electric weight; And reach the electric weight equilibrium at last, promptly the electric weight stored of each electric capacity equates.It should be noted that in the present embodiment electric capacity 104,105,106 is preferably has identical capacitance values.
At electric capacity 104,105, reach the electric weight equilibrium between 106 after; Can closed first switch 107,108,109 and second switch 110,111,112; Open the 3rd switch 113,114,115 and the 4th switch 116,117,118, make that the electric capacity 104,105,106 reach after the electric weight equilibrium is parallelly connected with battery 101,102,103 again respectively, and parallelly connected at electric capacity 104 with battery 101; Electric capacity 105 is parallelly connected with battery 102; And electric capacity 106 and battery 103 parallelly connected after, electric capacity 101 discharges and recharges battery 101 according to the electric weight of self storage, electric capacity 105 discharges and recharges battery 102 according to the electric weight of self storage; Electric capacity 106 discharges and recharges battery 103 according to the electric weight of self storage, and then has realized that battery 101,102, the electric weight between 103 shift.So repeatedly, then can be so that battery 101,102, the electric weight between 103 remain on equilibrium state.
It should be noted that; In above embodiment, can carry out the electric weight equilibrium treatment to a plurality of batteries through the unified open closed state of controlling the switch in first switching system 120 and the second switch system 130, but in other execution modes of the present invention; Also can be as required the battery of any amount in the battery pack be carried out the electric weight equilibrium; As referring to Fig. 1, can carry out the electric weight equilibrium treatment to battery 101 and battery 103 as required, the present invention does not do concrete qualification to this.
In addition, for the ease of explanation, only show 101,102,103, three electric capacity 104,105,106 of three batteries and corresponding switch among Fig. 1; But; In practical application, can be provided with a plurality of batteries and with battery electric capacity one to one, the present invention does not also do concrete qualification to this.
In addition, the first disclosed switch, second switch, the 3rd switch and the 4th switch are controlled switch, and it can be preferably relay or analog switch.
The present invention further discloses a kind of battery electric quantity equalizing circuit, and it can comprise above a plurality of electric capacity that disclose 104,105,106, first switching system 120 and second switch system 130, can be used for a plurality of batteries 101,102,103 are carried out the electric weight equilibrium.
Therefore; The invention provides a kind of battery electric quantity equalizing circuit and battery system; It utilizes a plurality of electric capacity under the control of switching system, a plurality of batteries to be carried out the electric weight equilibrium, can under big capacity, high-tension occasion, still keep lower energy loss, has low energy consumption, high efficiency advantage.
More than be merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a battery system is characterized in that, comprising:
A plurality of batteries;
A plurality of electric capacity correspond respectively to a said battery;
First switching system is connected in parallel each said electric capacity respectively with corresponding said battery;
The second switch system is connected in parallel said a plurality of electric capacity.
2. battery system according to claim 1; It is characterized in that; Said first switching system comprises a plurality of first switches and a plurality of second switch; Each said first switch and each said second switch correspond respectively to a said battery and a said electric capacity; First pole plate of the positive pole that each said first switch selectivity connects corresponding said battery and corresponding said electric capacity, second pole plate of the negative pole of the said battery of each said second switch selectivity connection correspondence and corresponding said electric capacity.
3. battery system according to claim 2; It is characterized in that; First end of each said first switch connects the positive pole of corresponding said battery; Second end of each said first switch connects first pole plate of corresponding said electric capacity, and first end of each said second switch connects the negative pole of corresponding said battery, and second end of each said second switch connects second pole plate of corresponding said electric capacity.
4. battery system according to claim 3; It is characterized in that; Said second switch system comprises a plurality of the 3rd switches and a plurality of the 4th switch; Each said the 3rd switch and each said the 4th switch be corresponding to a said electric capacity, and first end of each said the 3rd switch connects with first pole plate of corresponding said electric capacity, second pole plate connection of first end of each said the 4th switch and corresponding said electric capacity; And second end of said a plurality of the 3rd switches interconnects, and second end of said a plurality of the 4th switches interconnects.
5. battery system according to claim 4; It is characterized in that, closed at said first switch and said second switch, and when said the 3rd switch and said the 4th switch opens; Said battery is connected in parallel with corresponding said electric capacity; Open at said first switch and said second switch, and when said the 3rd switch and said the 4th switch closure, said electric capacity is connected in parallel.
6. a battery electric quantity equalizing circuit is used for a plurality of batteries are carried out the electric weight equilibrium, it is characterized in that said balancer comprises:
A plurality of electric capacity correspond respectively to a said battery;
First switching system is connected in parallel each said electric capacity respectively with corresponding said battery;
The second switch system is connected in parallel said a plurality of electric capacity.
7. battery electric quantity equalizing circuit according to claim 6; It is characterized in that; Said first switching system comprises a plurality of first switches and a plurality of second switch; Each said first switch and each said second switch correspond respectively to a said battery and a said electric capacity; First pole plate of the positive pole that each said first switch selectivity connects corresponding said battery and corresponding said electric capacity, second pole plate of the negative pole of the said battery of each said second switch selectivity connection correspondence and corresponding said electric capacity.
8. battery electric quantity equalizing circuit according to claim 7; It is characterized in that; First end of each said first switch connects the positive pole of corresponding said battery; Second end of each said first switch connects first pole plate of corresponding said electric capacity, and first end of each said second switch connects the negative pole of corresponding said battery, and second end of each said second switch connects second pole plate of corresponding said electric capacity.
9. battery electric quantity equalizing circuit according to claim 7; It is characterized in that; Said second switch system comprises a plurality of the 3rd switches and a plurality of the 4th switch; Each said the 3rd switch and each said the 4th switch be corresponding to a said electric capacity, and first end of each said the 3rd switch connects with first pole plate of corresponding said electric capacity, second pole plate connection of first end of each said the 4th switch and corresponding said electric capacity; And second end of said a plurality of the 3rd switches interconnects, and second end of said a plurality of the 4th switches interconnects.
10. battery electric quantity equalizing circuit according to claim 9; It is characterized in that, closed at said first switch and said second switch, and when said the 3rd switch and said the 4th switch opens; Said battery is connected in parallel with corresponding said electric capacity; Open at said first switch and said second switch, and when said the 3rd switch and said the 4th switch closure, said electric capacity is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204876859U CN202424211U (en) | 2011-11-29 | 2011-11-29 | Battery power equalization circuit and battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204876859U CN202424211U (en) | 2011-11-29 | 2011-11-29 | Battery power equalization circuit and battery system |
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| CN202424211U true CN202424211U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204876859U Expired - Fee Related CN202424211U (en) | 2011-11-29 | 2011-11-29 | Battery power equalization circuit and battery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138314A (en) * | 2011-11-29 | 2013-06-05 | 东莞钜威新能源有限公司 | Battery power balance circuit and battery system |
| CN106712168A (en) * | 2016-12-14 | 2017-05-24 | 华南理工大学 | Parallel battery pack two-way lossless equalization circuit based on inductance energy storage |
-
2011
- 2011-11-29 CN CN2011204876859U patent/CN202424211U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138314A (en) * | 2011-11-29 | 2013-06-05 | 东莞钜威新能源有限公司 | Battery power balance circuit and battery system |
| CN103138314B (en) * | 2011-11-29 | 2016-04-27 | 东莞钜威新能源有限公司 | A kind of battery power balance circuit and battery system |
| CN106712168A (en) * | 2016-12-14 | 2017-05-24 | 华南理工大学 | Parallel battery pack two-way lossless equalization circuit based on inductance energy storage |
| CN106712168B (en) * | 2016-12-14 | 2023-08-18 | 华南理工大学 | Parallel battery pack bidirectional lossless equalization circuit based on inductance energy storage |
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| TR01 | Transfer of patent right |
Effective date of registration: 20160321 Address after: 523808, Guangdong District, Songshan hi tech Industrial Development Zone, Dongguan, seven industrial North Road, 1 force science and technology center, 3 floor, B District Patentee after: Dongguan Powerwise Technology Co., Ltd. Address before: 523808 productivity building, Songshan science and Technology Industrial Park, Guangdong, Dongguan Province, room 401-403 Patentee before: Dongguan PowerWise New Energy Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20191129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |