A reconfigurable equalization circuit with a variable battery pack structure
A technology for equalizing circuits and battery packs, applied in charge equalizing circuits, battery circuit devices, secondary battery charging/discharging, etc., can solve problems such as high cost, troublesome control, and large number of components used, and achieve low cost and balanced Convenience and the effect of using less
Inactive Publication Date: 2019-01-04
HUBEI UNIV OF TECH
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Problems solved by technology
Commonly used methods include the Buck-Boost method based on inductance, the Fit capacitor method, the transformer method, and the DC-DC converter method, etc., but there are problems such as a large number of components used, high cost, troublesome control, and low conversion efficiency.
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[0018] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the examples. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0019] Such as figure 1 As shown, there are 3 switches between each parallel battery pack and the parallel battery pack, and the 3 switches are arranged in a 匚 shape. The positive pole of the parallel battery pack is connected to the positive busbar through a switch or directly, and the negative pole of the parallel battery pack is connected to the negative busbar through a switch or directly. The positive busbar is the positive pole of the energy storage battery pack, and the negative busbar is the negative pole of the energy storage battery pack.
[0020] Such as figure 2 As ...
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The invention provides a reconfigurable equalization circuit of a variable battery pack structure, the circuit includes parallel battery packs, switches, and positive and negative busbars, all the parallel battery packs, switches, positive bus bars and negative bus bars constitute the energy storage battery packs, three switches are arranged between each parallel battery pack and the parallel battery pack, and the three switches are arranged in a / character arrangement, the positive pole of the parallel battery pack is directly connected with the positive bus bar through the switch or the negative pole of the parallel battery pack is directly connected with the negative bus bar through the switch or the negative bus bar. In Mode 1, the energy storage battery pack is discharged or charged orstationary and does not need to be equalized, and all the parallel battery packs in the energy storage battery pack are connected in series; In Mode 2, the energy storage battery pack is stationary and needs to be equalized, and all the parallel battery packs in the energy storage battery pack are connected in parallel. The circuit of the invention can conveniently equalize the energy storage battery pack composed of a plurality of parallel battery packs in series only by a plurality of switches, and the use number of the components is small, the cost is low, and the equalization is convenient.
Description
technical field [0001] The invention relates to the field of battery energy storage, in particular to a reconfigurable equalization circuit with variable battery pack structure. Background technique [0002] Due to the inconsistencies in the production and use of batteries, in order to increase the available capacity of the battery pack and reduce the risk of overcharging or over-discharging of single cells, it is necessary to balance the battery pack. The passive equalization method that achieves battery pack balance by dissipating energy has the disadvantages of wasting energy and increasing the difficulty of thermal management. However, the current active equalization circuit redistributes energy by designing specific energy converters. Commonly used methods include the Buck-Boost method based on inductance, the Fit capacitor method, the transformer method, and the DC-DC converter method, etc., but there are problems such as a large number of components used, high cost, ...
Claims
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Login to View More IPC IPC(8): H02J7/00H01M10/44H01M10/42
CPCH01M10/4207H01M10/441H02J7/0019Y02E60/10
Inventor 吴铁洲郭炅纪锋杜炘宇郝山戢理黄明明胡圣乔肖菀莹高媚陈煌李拥军周传建石肖王利杰
Owner HUBEI UNIV OF TECH