Power battery energy storage system and control method thereof
A technology of energy storage system and power battery, applied in flexible AC transmission system, secondary battery, battery data exchange, etc., can solve problems such as reuse, reduce coupling, improve robustness, and realize the effect of automatic control operation
Pending Publication Date: 2021-05-07
网汇(上海)新能源科技有限公司 +2
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Problems solved by technology
[0003] In view of this, an embodiment of the present invention provides a power battery energy storage system and its control method to solve how to reuse cascade batteries with large differences in rated capacity and state of charge in the energy storage power station, and how to realize The problem of stable operation control of the energy storage system integrating cascaded power batteries
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[0042] In one embodiment of the present invention, as figure 2As shown, it is the communication structure between the ACDC converter, the battery, the sub-control unit and the main control unit. The sub-control unit is respectively connected with the ACDC converter, the battery and the main control unit, and each branch is composed of the sub-control unit, the ACDC converter and the battery:
[0043] The ACDC converter receives the power setting value or power distribution value or the switch command issued by the sub-control unit through the RS485 bus, and at the same time uploads the operating data and status of the ACDC converter to the sub-control unit.
[0044] Since each ACDC converter can receive the operating power setting value or power distribution value issued by the sub-control unit from the main control unit, the operation of each branch is controllable, and the operation of each branch can be controlled in time without excessive consumption of a branch. The bat...
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The invention provides a power battery energy storage system and a control method thereof, which are used for solving the problem of how to realize reutilization of echelon batteries with relatively large difference in rated capacity and charge state and stable operation control of integrated echelon power batteries. The system comprise a plurality of sub-control units, each sub-control unit is connected with an ACDC converter, the alternating current side of each ACDC converter is connected with a power grid, and the direct current side of each ACDC converter is connected with a battery; each sub-control unit is connected with a main control unit; each sub-control unit, the ACDC converter connected with the sub-control unit and the battery connected with the ACDC converter form a branch; the alternating current sides of the ACDC converters are connected in parallel. Through a parallel connection mode of multiple branches, coordinated operation control of each energy storage branch in different states under parallel connection is realized, independent operation control of each branch is realized, coupling among system equipment is reduced, and robustness of the device is improved; or, local automatic control operation of the energy storage system is realized in a fixed power operation mode.
Description
technical field [0001] The invention relates to the technical field of new energy, in particular to a power battery energy storage system and a control method thereof. Background technique [0002] With the popularization of the new energy electric vehicle industry, the number of retired power batteries is increasing. The remaining capacity of these retired batteries is mostly 60%-70% of the initial capacity, and some are close to 80%. Has use value. If these batteries are disassembled directly, it is obviously a waste of resources. How to find a suitable cascade utilization scene to reuse the cascade power battery has become a serious problem faced by the electric vehicle industry. SUMMARY OF THE INVENTION [0003] In view of this, the embodiments of the present invention provide a power battery energy storage system and a control method thereof, to solve how to reuse the echelon batteries with large differences in rated capacity and state of charge in an energy storage...
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IPC IPC(8): H02J3/32H02J7/00H01M10/42
CPCH02J3/32H02J7/00032H01M10/4257H01M2010/4271H01M2010/4278Y02E40/10Y02E60/10
Inventor 张晓东夏岩松柴琎劳永建徐真涛张亚平
Owner 网汇(上海)新能源科技有限公司