Equalizing circuit of lithium ion battery pack
A lithium-ion battery pack and balancing circuit technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as high price and unbalanced capacity, achieve good balance, reduce voltage deviation, improve utilization efficiency and The effect of service life
Active Publication Date: 2014-09-24
湖南省麦克斯新能源有限公司
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Problems solved by technology
However, compared with nickel-hydrogen, nickel-cadmium, and lead-acid batteries, the application and development of lithium-ion batteries should be promoted faster. The problem of unbalanced capacity when lithium-ion battery packs are used in series greatly limits their wide application. Especially for large-capacity lithium battery packs, which are expensive, effective and reliable equalization circuits and equalization strategies are needed. It can be said that in order to realize the wide application of large-capacity lithium-ion batteries in high-power occasions, the battery cell The effective balance of is one of the current technical bottlenecks
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[0009] In order to facilitate the understanding of those skilled in the art, the structural principle of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings:
[0010] Such as figure 1 As shown, it is a specific embodiment of the lithium-ion battery pack balancing circuit of the present invention. A lithium-ion battery pack balancing circuit includes a rectifier circuit and a filter circuit connected to the rectifier circuit, and is characterized in that it also includes a transformer circuit and a control circuit. and the output circuit, the transformer circuit is connected between the filter circuit and the output circuit, the control circuit is connected with the transformer circuit and the output circuit respectively, and the transformer circuit includes a transformer TR1, resistors R2, R3, capacitor C4, C5, C6, C7, diodes D5, D6, D8, inductor L2, light-emitting diode LED1, the transformer TR1 in...
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The invention discloses an equalizing circuit of a lithium ion battery pack. The equalizing circuit of the lithium ion battery pack comprises a rectification circuit, a filter circuit, a transformer circuit, a control circuit and an output circuit, wherein the filter circuit is connected with the rectification circuit; the transformer circuit is connected between the filter circuit and the output circuit; and the control circuit is connected with the transformer circuit and the output circuit respectively. The equalizing circuit of the lithium ion battery pack has the advantages of long service life, high safety and efficiency and the like.
Description
technical field [0001] The invention relates to a lithium-ion battery, in particular to a balanced charging circuit for a lithium-ion battery pack. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, small size, and light weight. In the mobile phone and notebook computer markets, it has completely replaced other batteries and has a 100% market share. At present, lithium-ion batteries are rapidly extending into power tools, electric In bicycles and other applications, its broad market prospects are increasingly recognized by the industry. However, compared with nickel-hydrogen, nickel-cadmium, and lead-acid batteries, the application and development of lithium-ion batteries should be promoted faster. The problem of unbalanced capacity when lithium-ion battery packs are used in series greatly limits their wide application. Especially for large-capacity lithium battery packs, which are expensive, effective and reliable equalization c...
Claims
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IPC IPC(8): H02J7/00H02J7/10
Inventor 蒋涛奉平
Owner 湖南省麦克斯新能源有限公司