CN212462870U - Energy storage power station multi-cluster battery parallel circulation control circuit - Google Patents
Energy storage power station multi-cluster battery parallel circulation control circuit Download PDFInfo
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- CN212462870U CN212462870U CN202021552571.3U CN202021552571U CN212462870U CN 212462870 U CN212462870 U CN 212462870U CN 202021552571 U CN202021552571 U CN 202021552571U CN 212462870 U CN212462870 U CN 212462870U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 36
- 238000007599 discharging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
A multi-cluster battery parallel circulating current control circuit of an energy storage power station belongs to the technical field of energy storage systems. The energy storage converter comprises an energy storage converter, bus bars and n groups of battery clusters, wherein positive output of each battery cluster is collected through a positive bus bar and then input to a positive input end of the energy storage converter, negative output of each battery cluster is collected through a negative bus bar and then input to a negative input end of the energy storage converter, m +1 branch circuits are arranged between the positive electrode of each battery cluster and the positive bus bar and between the negative electrode of each battery cluster and the negative bus bar, a divider is arranged on each of the m +1 branch circuits in series, resistors are further arranged on m of the m branch circuits in series, and n and m are integers larger than 1. The advantages are that: the consistency of a plurality of groups of batteries to the outside can be obtained, the problem of inter-cluster circulation caused by parallel connection of a plurality of batteries is effectively solved, the cost is low, the economic benefit is high, and the efficiency and the service life of a related operated energy storage system can be improved on the basis of the prior art.
Description
Technical Field
The utility model belongs to the technical field of energy storage system, concretely relates to many parallelly connected circulation control circuit of battery of energy storage power station.
Background
The internal resistance of the battery cluster is very small under the influence of the characteristics of the lithium battery and the structure of the battery cluster, and when the energy storage needs to meet the requirement of high-power output, a plurality of battery clusters are generally required to be connected in parallel. In the existing single-stage energy storage converter system, the number of parallel-connected clusters of the battery clusters is increased, but due to the cost requirement, a modularized energy storage converter is not adopted, so that the current sharing control of the batteries in each cluster cannot be effectively carried out, the performances of the batteries in each cluster are inconsistent, the inconsistent charging and discharging currents of the batteries in each cluster can easily occur in the charging and discharging process of the energy storage system, and along with the long-term operation of the system, the circulation phenomenon can be inevitably generated among the battery clusters, so that the safe and stable operation of energy storage system equipment is influenced, and the reduction of the system performance and the early termination of the cycle life of the energy storage system equipment can even be caused. The reason why the circulation current occurs in the charging and discharging processes of the multiple clusters of batteries is that the electrical characteristics of the clusters of batteries externally presented are inconsistent, specifically, the internal resistances of the clusters of batteries are different. In view of the above-mentioned prior art, the applicant has made an advantageous design, considering that the internal resistance of the battery in the battery cluster is changed, and thus the overall internal resistance of the battery cluster is changed, so as to achieve the consistency of the external electrical characteristics of each battery cluster, thereby eliminating the circulation current occurring between the battery clusters to improve the performance of the battery cluster system, and the technical solutions to be described below are generated in this context.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a many parallelly connected circulation control circuit of batteries of energy storage power station can effectively solve the parallelly connected intersluster circulation problem that causes of many batteries.
The utility model aims at reaching like this, a many parallelly connected circulation control circuit of battery of energy storage power station, including energy storage converter, the generating line that converges and n group battery cluster, the generating line that converges include just converging generating line and the negative generating line that converges, the positive output of each battery cluster is imported to energy storage converter's positive input through just converging the generating line and collecting the back, the negative output of each battery cluster is imported to energy storage converter's negative input end, its characterized in that through the negative generating line that converges after the negative output of each battery cluster: m +1 branch circuits are arranged between the positive electrode of each battery cluster and the positive bus bar and between the negative electrode of each battery cluster and the negative bus bar, each branch circuit of the m +1 branch circuits is provided with a resistor divider in series, m of the branch circuits are further provided with resistors in series, and n and m are integers larger than 1.
In a specific embodiment of the utility model, still include battery management system, branch hinder ware be connected with battery management system, by its switching of battery management system control.
In another specific embodiment of the present invention, the resistance of the resistor is between 0.1 Ω and 1 Ω.
The utility model discloses a resistance that the series resistance is minimum between busbar and each battery cluster changes the external internal resistance of each battery cluster, compares with prior art, and the beneficial effect who has is: the consistency of a plurality of groups of batteries to the outside can be obtained, the problem of inter-cluster circulation caused by parallel connection of a plurality of batteries is effectively solved, the cost is low, the economic benefit is high, and the efficiency and the service life of a related operated energy storage system can be improved on the basis of the prior art.
Drawings
Fig. 1 is an electrical connection diagram of the present invention.
In the figure: 1. an energy storage converter; 2. bus bar, 21, positive bus bar, 22, negative bus bar; 3. a battery cluster; 4. a resistor divider; 5. a resistance; 6. a battery management system.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.
Referring to fig. 1, the utility model relates to a many bunches of batteries of energy storage power station circulate current control circuit in parallel, including energy storage converter 1, busbar 2 and a plurality of group battery cluster 3 that converge, busbar 2 include positive busbar 21 and the negative busbar 22 that converges, each battery cluster 3's positive output is imported to energy storage converter 1's positive input after converging through positive busbar 21, and each battery cluster 3's negative output is imported to energy storage converter 1's negative input after converging through negative busbar 22. M +1 branches are arranged between the positive electrode of each battery cluster 3 and the positive bus bar 21 and between the negative electrode of each battery cluster 3 and the negative bus bar 22, a resistor divider 4 is arranged in series on each of the m +1 branches, resistors 5 are further arranged in series on m of the m branches, and n and m are integers larger than 1. The resistor 5 is used for changing the internal resistance of the battery in the battery cluster 3, so that the overall internal resistance of the battery cluster 3 is changed, the external electrical characteristics of the battery clusters 3 are consistent, the circulation current among the battery clusters 3 is eliminated, and the performance of the battery system is further improved.
Further, the utility model discloses still include battery management system 6, branch hinder ware 4 be connected with battery management system 6 jointly, battery management system 6 controls each and divides the switching of hindering the inside contactor of 4 of ware.
Hereinafter, the specific principle of the present invention will be explained. Firstly, the battery management system 6 closes the contactors of the shunt resistors 4 to connect the battery clusters 3 with the energy storage converter 1, and the energy storage system performs charge and discharge operation according to the set power. The battery management system 6 detects the current values of the 1 st cluster and the 2 nd cluster … … nth cluster battery clusters 3, and adds the current values of the respective cluster battery clusters 3 to obtain an average value Iav = (I1+ I2+ … + In)/n, where I1 and I2 … … In are the current values flowing through the respective battery clusters 3. And the battery management system 6 inputs the corresponding branch number for the cluster with the highest current value in each battery cluster 3 obtained by monitoring according to the calculation result. Assuming that there are five cell cluster 3 circuits, the average value of the calculated currents of the five circuits is Iav = (I1+ I2+ I3+ I4+ I5)/5= 50A, and the calculated current value I3=60A of the third circuit, and the current values I1, I2, I4, I5 of the other four circuits are 48A, 49A, 50A, respectively, so that the current value I3 of the third circuit is different from the average current value Iav by the maximum, and at this time, the corresponding resistor in the third circuit needs to be put in to reduce the current value thereon, such as to 51A, and at this time, the currents of the five circuits are close, so that the problem of circulation among the cell clusters is suppressed. The utility model discloses a change the internal resistance of battery cluster 3 and change the electric current of the place cluster, can draw each battery cluster 3 to the same level. The current in each of the other clusters can also be adjusted by changing the internal resistance of the cluster in which it is located until the parallel battery clusters 3 reach a uniform current level.
Claims (3)
1. The utility model provides a many batteries of energy storage power station loop current control circuit that connects in parallel, includes energy storage converter (1), busbar (2) and n group battery cluster (3) converge, busbar (2) including just converging busbar (21) and burden busbar (22), the positive output of each battery cluster (3) is imported to the positive input of energy storage converter (1) after converging through plus busbar (21), the negative output of each battery cluster (3) is imported to the negative input of energy storage converter (1) after converging through burden busbar (22), its characterized in that: m +1 branches are arranged between the positive pole of each battery cluster (3) and the positive bus bar (21) and between the negative pole of each battery cluster (3) and the negative bus bar (22), a shunt resistor (4) is arranged on each of the m +1 branches in series, a resistor (5) is further arranged on m of the m branches in series, and n and m are integers larger than 1.
2. An energy storage power station multi-cluster battery parallel circulating current control circuit according to claim 1, characterized by further comprising a battery management system (6), wherein the resistor divider (4) is connected with the battery management system (6) and is controlled to be opened and closed by the battery management system (6).
3. The parallel circulating current control circuit of the energy storage power station multi-cluster battery as claimed in claim 1, characterized in that the resistance value of the resistor (5) is between 0.1 Ω and 1 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552571.3U CN212462870U (en) | 2020-07-30 | 2020-07-30 | Energy storage power station multi-cluster battery parallel circulation control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552571.3U CN212462870U (en) | 2020-07-30 | 2020-07-30 | Energy storage power station multi-cluster battery parallel circulation control circuit |
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| CN212462870U true CN212462870U (en) | 2021-02-02 |
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| CN202021552571.3U Expired - Fee Related CN212462870U (en) | 2020-07-30 | 2020-07-30 | Energy storage power station multi-cluster battery parallel circulation control circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865153A (en) * | 2021-03-02 | 2021-05-28 | 阳光电源股份有限公司 | Energy storage system and capacity expansion method and control method thereof |
| CN113782924A (en) * | 2021-09-14 | 2021-12-10 | 傲普(上海)新能源有限公司 | PACK isolation circuit for short-board battery cell of energy storage power station and power-on and power-off method |
| CN114069789A (en) * | 2021-11-20 | 2022-02-18 | 傲普(上海)新能源有限公司 | Battery cluster parallel circulating current transformer control circuit |
| CN114336883A (en) * | 2022-01-07 | 2022-04-12 | 傲普(上海)新能源有限公司 | Energy transfer type battery cluster parallel circulating current control circuit |
-
2020
- 2020-07-30 CN CN202021552571.3U patent/CN212462870U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865153A (en) * | 2021-03-02 | 2021-05-28 | 阳光电源股份有限公司 | Energy storage system and capacity expansion method and control method thereof |
| CN112865153B (en) * | 2021-03-02 | 2024-05-14 | 阳光电源股份有限公司 | Energy storage system, capacity expansion method and control method thereof |
| CN113782924A (en) * | 2021-09-14 | 2021-12-10 | 傲普(上海)新能源有限公司 | PACK isolation circuit for short-board battery cell of energy storage power station and power-on and power-off method |
| CN114069789A (en) * | 2021-11-20 | 2022-02-18 | 傲普(上海)新能源有限公司 | Battery cluster parallel circulating current transformer control circuit |
| CN114069789B (en) * | 2021-11-20 | 2023-09-22 | 傲普(上海)新能源有限公司 | Control circuit of battery cluster parallel circulation transformer |
| CN114336883A (en) * | 2022-01-07 | 2022-04-12 | 傲普(上海)新能源有限公司 | Energy transfer type battery cluster parallel circulating current control circuit |
| CN114336883B (en) * | 2022-01-07 | 2023-12-05 | 傲普(上海)新能源有限公司 | Energy transfer type battery cluster parallel circulation control circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |