Energy storage system
An energy storage system and energy storage technology, applied in the field of energy storage systems, can solve the problems of the battery cluster A1 being unable to continue to operate, wasting resources, and reducing the operating efficiency of the energy storage system.
Pending Publication Date: 2021-07-30
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology
If the cluster-level DC / DC conversion circuit B1 connected to the battery cluster A1 fails, the battery cluster A1 cannot continue to operate
In both cases, the unfailed battery cluster or battery pack cannot operate due to the failure of other components in the charging and discharging circuit, which not only causes waste of resources, but also reduces the operating efficiency of the energy storage system
Method used
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[0031] When a battery cluster in the energy storage system or a battery pack in the battery cluster fails or fails, the battery cluster in the faulty circuit does not operate and stops operating, resulting in a decrease in the operating efficiency of the energy storage system. If the operating efficiency of the energy storage system is to be avoided, if a backup battery cluster is installed in the energy storage system, the material cost of the energy storage system will increase. In addition, the backup battery cluster also needs to be charged and discharged regularly to prevent damage to the battery feed, which increases the cost of maintaining the backup battery cluster.
[0032] An embodiment of the present application provides an energy storage system, which can improve the operating efficiency and system reliability when a component in the energy storage system fails. See figure 2 , the energy storage system may include a plurality of energy storage branches (such as N...
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The invention provides an energy storage system which is used for improving the operation efficiency and system reliability when a component in the energy storage system breaks down and avoiding resource waste. The energy storage system comprises a plurality of energy storage branches, at least one switch unit and a control circuit. Each energy storage branch comprises a first bus, a cluster-level conversion circuit and a battery cluster which are sequentially connected in series, and a plurality of equalization conversion circuits and equalization buses. The battery cluster comprises a plurality of battery units connected in series, and each battery unit comprises a battery pack. Each battery pack is connected with the input side of the corresponding equalization conversion circuit, and the output sides of the plurality of equalization conversion circuits are respectively connected with the equalization buses. The anode end of the battery cluster is connected with the cluster-level conversion circuit, and the cathode end of the battery cluster is connected with a ground wire. A switch unit is arranged between two adjacent energy storage branches, and if the switch unit is in a first state, the equalization buses in the two energy storage branches are connected.
Description
technical field [0001] The present application relates to the technical field of energy storage, and in particular to an energy storage system. Background technique [0002] Usually, an energy storage system includes multiple battery clusters, such as figure 1 As shown, the energy storage system may include a battery cluster A1 and a battery cluster A2. Each battery cluster may include a plurality of battery packs connected in series, each battery cluster may be connected to a cluster-level DC / DC conversion circuit, the first end of the cluster-level DC / DC conversion circuit is connected to the first end of a battery cluster, The second terminal is connected to low level, and the third terminal is connected to the DC bus. The second terminal of each battery cluster is connected to low level. For example, the DC bus C1, the cluster-level DC / DC conversion circuit B1, and the battery cluster A1 form a charging and discharging circuit. The cluster-level DC / DC conversion circu...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0013H02J7/0019H02J7/0014H02J7/34H02J7/007182H02J7/0068H02J7/0031H02J1/10Y02E60/10H02J2207/20
Inventor 李建山张彦忠周贺吴志鹏
Owner HUAWEI DIGITAL POWER TECH CO LTD