Bidirectional equalization circuit and bidirectional equalization method for spatial high-voltage storage battery pack
A battery pack and balancing circuit technology, applied in charge balancing circuits, battery circuit devices, circuit devices, etc., can solve problems such as low efficiency of battery packs, and achieve the effect of improving reliability
Active Publication Date: 2017-11-17
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology
If passive equalization is still used at this time, the equalization opportunity will generate a lot of heat, which will lower the efficiency of the battery pack.
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[0031] based on the following Figure 1 ~ Figure 4 , specifically explain the preferred embodiment of the present invention.
[0032] Such as figure 1 As shown, the present invention provides a bidirectional equalization circuit for a space high-voltage battery pack, which is connected to a high-voltage lithium-ion battery to realize bidirectional equalization of battery cells in the battery.
[0033] The high-voltage lithium-ion battery includes m+1 battery packs (m is a natural number), and each battery pack includes n battery cells CELL1...CELLm (n is a natural number).
[0034] Correspondingly, the bidirectional equalization circuit of the space high-voltage battery pack includes m+1 groups of bidirectional equalization circuits, wherein, as figure 2 As shown, each group of bidirectional equalization circuits includes: a multi-winding flyback transformer, the primary side of the flyback transformer has n windings PRI1...PRIn, and the secondary side of the flyback transf...
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The invention provides a bidirectional equalization circuit and a bidirectional equalization method for a spatial high-voltage storage battery pack. A multi-winding type flyback transformer and an MOS tube are adopted for constructing a high-efficiency and reliable bidirectional equalization circuit. If a high-voltage lithium ion battery detects that the battery voltage of a certain battery monomer is larger than an equalization threshold during the charging process, the high-voltage lithium ion battery controls the flyback transformer to charge the battery pack by means of the above battery monomer. If the high-voltage lithium ion battery detects that the battery voltage of a certain battery monomer is lower than the equalization threshold during the discharging process, the high-voltage lithium ion battery controls the flyback transformer to charge the above battery monomer by means of the battery pack. According to the invention, the bidirectional equalization of the energy between each battery monomer and the storage battery pack can be realized and the equalization time of the system is improved. The failure rate during the equalization process is reduced.
Description
technical field [0001] The invention relates to a two-way equalization circuit and a two-way equalization method for a space high-voltage battery pack. Background technique [0002] Space exploration is the frontier field of scientific and technological development in the world today, and it is highly fundamental, forward-looking, innovative and driving. Human spaceflight activities can generally be divided into three major fields: earth application satellites, manned spaceflight and deep space exploration. Carrying out space activities is an inevitable choice for the development of spaceflight technology. As one of the important subsystems of the space vehicle, the power supply subsystem will provide the energy source required for the vehicle to perform test verification tasks. At present, with the advancement of space power system technology, lithium-ion battery packs are responsible for supplying power to platform loads during the shadow period. Lithium-ion series batte...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 赵旺彬黄军陈海涛吴春瑜李开宇
Owner SHANGHAI INST OF SPACE POWER SOURCES