Equalizing system and method for energy storage system
A technology of balancing system and energy storage system, applied in electric vehicles, electrical components, transportation and packaging, etc., to solve grid connection problems, improve charging and discharging efficiency, and reduce impact
Active Publication Date: 2013-06-19
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology
[0006]The purpose of the present invention is to provide an energy storage system equalization solution, aiming to solve the problem of the large amount of heat generated during the equalization process in the existing resistance dissipation type equalization method , resulting in a huge waste of effective storage energy; at the same time, a large amount of heat is generated, which increases the burden of thermal management and other issues
At the same time, solve the problem of slow equalization speed in large-capacity energy storage system by single equalization
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[0025] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0026] The load-type supplementary power balance system includes a power generation device, a power combination system, a DC bus, a charging module, a battery pack, a grid-connected inverter, a user module, a constant current source, and a balanced power input terminal. In the system provided by the present invention, there are multiple generating devices, generating device 1, generating device 2, ..., generating device n (wherein n is greater than or equal to 2), and are all connected to the electric energy integration system, the electric energy integration system The charging module is connected through the DC bus, and the charging module is connected to the battery pack; the grid-connected inverter and the user module are sequentially...
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The invention discloses an equalization system of an energy storage system, which includes a power generation device, an electric energy combining system, a DC bus, a charging module, a battery pack, a grid-connected inverter, a user module, a constant current source, and an input end of an equalized power supply. The power generation device is connected to the power combination system, and the power combination system is connected to the charging module through the DC bus, and the charging module is connected to the battery pack; the grid-connected inverter and the user module are connected to the DC bus in turn, and the constant current source is connected to On the user module, the AC power after passing through the inverter is converted into DC power, and connected to the battery pack through the balanced bus connected to the input end of the balanced power supply, and the constant current source converts the AC output after passing through the grid-connected inverter into The DC output is used as a balancing source to balance the battery cells in the battery pack. Adopting the present invention can realize effective dynamic equalization, in addition, a large amount of heat will not be generated during the equalization process, and the charging and discharging efficiency is improved.
Description
technical field [0001] The invention relates to a large-scale electric storage system, in particular to an equalization system and an equalization method of the energy storage system. Background technique [0002] In the field of new energy power generation, the use of large-scale power storage technology can make the output power of unstable new energy power smoothly adjustable, change unstable power input into continuous, safe and reliable power output, and reduce the impact of fluctuating power on the grid. impact, thus solving the problem of grid-connected new energy power. For off-grid new energy power generation in islands and remote areas, large-scale power storage systems can achieve power smoothing and storage to meet the needs of off-grid power generation in islands and remote areas and the normal supply of power without new energy output. [0003] Safety and energy storage efficiency are two important parameters for examining energy storage systems. Temperature...
Claims
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IPC IPC(8): H02J7/00
Inventor 冯自平陈永珍宋文吉吕杰韩颖
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI