Parallel battery cluster topology of integrated circulating current suppression and state of charge equalization circuit

A state of charge and circulating current suppression technology, which is applied to battery circuit devices, circuits, collectors, etc., can solve the problems of limited available capacity of parallel battery clusters, increased energy storage system costs, inconsistent battery performance, etc., to achieve good circulation suppression and The effects of state of charge balance, energy stability, and voltage stability

Pending Publication Date: 2022-07-12
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the inconsistency of battery performance will limit the available capacity of parallel battery clusters, resulting in waste of configuration capacity and increasing the cost of energy storage systems

Method used

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  • Parallel battery cluster topology of integrated circulating current suppression and state of charge equalization circuit
  • Parallel battery cluster topology of integrated circulating current suppression and state of charge equalization circuit
  • Parallel battery cluster topology of integrated circulating current suppression and state of charge equalization circuit

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Embodiment

[0042] like figure 1 As shown, the present invention, a parallel battery cluster topology integrating circulating current suppression and state-of-charge equalization circuits, includes a plurality of voltage sources connected in series with the parallel battery clusters. The total number of the voltage sources is n, the first voltage source U 1 , the second voltage source U 2 , ..., the nth voltage source U n The positive terminals of the first battery cluster B are 1 , the second battery cluster B 2 , ..., nth battery cluster B n connected to the negative terminal of the first voltage source U 1 , the second voltage source U 2 , ..., the nth voltage source U n The negative terminals of the batteries are connected together to form the negative terminals of the parallel battery clusters, and the output current of the corresponding battery clusters can be controlled by controlling the polarity and voltage of the voltage source, thereby controlling the energy flow between...

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Abstract

The invention discloses a parallel battery cluster topology integrated with a circulating current suppression and state-of-charge equalization circuit. The circulating current suppression and state-of-charge equalization circuit is formed by connecting a plurality of voltage sources and parallel battery clusters in series; wherein the positive ends of the first voltage source to the nth voltage source are respectively connected with the negative ends of the first battery cluster to the nth battery cluster, and the negative ends of the first voltage source to the nth voltage source are connected together to form the negative end of the parallel battery cluster; during working, the output current of the corresponding battery cluster is controlled by controlling the polarity and the voltage of the voltage source, so that the energy flow among different parallel clusters is controlled. The series capacitor, the bidirectional converter and the intermediate bus are introduced to realize dynamic equalization of the battery cluster, the number of switch tubes is reduced, the cost is reduced, the circuit is simple, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of automotive power batteries, and in particular relates to a parallel battery cluster topology integrating circulating current suppression and state-of-charge equalization circuits. Background technique [0002] Due to the inconsistency of batteries in manufacturing, working environment, and degree of aging, the state of charge of each battery is inconsistent during the charge-discharge cycle of the energy storage system. For battery clusters connected in parallel, during the charging process, there will be a situation where one battery cluster is fully charged while other battery clusters are not fully charged. In order to avoid overcharging the battery cluster, the remaining battery clusters will not be able to be further charged; During the discharge process, there may be a situation where a battery cluster has reached the minimum allowable state of charge, while the other battery clusters can still be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M50/512
CPCH02J7/0016H02J7/0031H02J7/0036H02J7/0047H01M50/512H02J2207/20Y02E60/10
Inventor 马智远莫文雄王勇许中栾乐周凯徐硕崔屹平彭和平
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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