Battery pack balancing circuit, method and device
A technology for equalizing circuits and battery packs, applied in battery circuit devices, charge equalizing circuits, circuit devices, etc., can solve problems such as unbalanced battery performance, affecting battery pack life, battery pack usable capacity and performance degradation, etc., to avoid Effect of unbalanced performance and extended service life
Active Publication Date: 2019-12-17
BEIJING ELECTRIC VEHICLE
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Problems solved by technology
[0003] Usually, due to process, cost, aging and other reasons, there may be differences among the cells in the battery pack, resulting in a serious imbalance in the performance of the cells in the battery pack, which leads to a continuous decline in the available capacity and performance of the battery pack, affecting battery life
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[0074] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents coming within the spirit and scope of the appended claims.
[0075] Specifically, each embodiment of the present invention aims at that when there are differences among the batteries in the battery pack, the performance of the batteries in the battery pack is likely to be severely unbalanced, resulting in a continuous decline in the available capacity and performance of the battery pack, which affects the life of the battery pack. T...
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The invention proposes a battery pack equalization circuit, method and device. A battery pack comprises N battery cells which are connected in series. The circuit comprises a transformer assembly and (N+1) switch assembly, wherein one end of a primary winding in the transformer assembly is connected with one end of the battery pack, the other end of the primary winding is connected with one end of a first switch assembly, the other end of the first switch assembly is connected with the other end of the battery pack, one end of an i(th) secondary winding in the transformer assembly is connected with one end of an i(th) battery cell in the battery pack, the other end of the i(th) secondary winding is connected with one end of a (i+1)th switch assembly, and the other end of the (i+1)th switch assembly is connected with the other end of the i(th) battery cell. Therefore, by conducting conduction time of each switch assembly in the battery pack equalization circuit, the equalization of the battery pack is achieved, the problem that the available capacity and the performance of the battery pack are continuously reduced caused by unbalance performance of the battery cells of the battery pack is prevented, and the service lifetime of the battery pack is prolonged.
Description
technical field [0001] The invention relates to the field of batteries, in particular to a battery pack balancing circuit, method and device. Background technique [0002] With the continuous development of science and technology, batteries play a very important role in our daily life and are widely used in various industries such as mobile phones, computers, electric vehicles, and drones. And as people's requirements for power are getting higher and higher, various terminals have begun to use battery packs in which multiple battery cells are connected in series as rechargeable batteries, thereby increasing the capacity of the battery. [0003] Usually, due to process, cost, aging and other reasons, there may be differences among the cells in the battery pack, resulting in a serious imbalance in the performance of the cells in the battery pack, which leads to a continuous decline in the available capacity and performance of the battery pack, affecting The life of the batter...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 陈卓杨重科韩广璞
Owner BEIJING ELECTRIC VEHICLE