Cell passive equalizing system and method
A passive balancing, battery technology, applied in charge balancing circuits, electric vehicles, battery circuit devices, etc., can solve the problems of increased battery capacity, high cost of active balancing, and different batteries, and achieve the effect of reducing the difference in capacity
Inactive Publication Date: 2017-08-22
SHENZHEN ANDING NEW ENERGY TECH DEV CO LTD
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Problems solved by technology
At the same time, with the increase in the number of charge and discharge cycles and the influence of factors such as storage time and temperature during use, the degree of wear and tear of each battery will be different. At the same time of charge and discharge, the capacity of each battery will vary. , the difference in battery capacity leads to different aging speeds of the battery, and as the battery continues to charge and discharge, the difference in battery capacity will gradually increase
At present, the method of active equalization is usually used to reduce the difference in the capacity of each battery, but the cost of active equalization is high and the efficiency is low
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specif...
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The invention provides a cell passive equalizing system. The system comprises a BCU, a current balancer, a balancing module and a charging / discharging unit. The current equalizer comprises multiple current equalizing units and multiple current sensing units. The balancing module comprises multiple switch units and multiple energy consumption units. The current balancing units, the current sensing units, the switch units and the energy consumption units are equal to and correspond to single cells in a cell group in quantity. The BCU is connected with a BMU and the charging / discharging unit. The BMU is connected with the current equalizer and the balancing module. Each current equalizing unit and each current sensing unit are connected with corresponding single cells correspondingly. Each switch unit and each energy consumption unit are connected with single cells correspondingly. Each switch unit is connected with the corresponding energy consumption unit. The charging / discharging unit is connected with each single cell in the cell group. The invention also provides a cell passive equalizing method.
Description
[0001] 【Technical field】 [0002] The invention relates to the technical field of batteries, in particular to a battery passive equalization system and method. [0003] 【Background technique】 [0004] During the production process of the battery, due to the difference in raw materials and production processes, there will be certain differences in its capacity, internal resistance, voltage and self-discharge rate. At the same time, with the increase in the number of charge and discharge cycles and the influence of factors such as storage time and temperature during use, the degree of wear and tear of each battery will be different. At the same time of charge and discharge, the capacity of each battery will vary. , The difference in battery capacity leads to different aging speeds of the battery. As the battery continues to charge and discharge, the difference in battery capacity will gradually increase. At present, the method of active equalization is usually used to reduce the...
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IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 龚建奎陈贵华饶睦敏李瑶
Owner SHENZHEN ANDING NEW ENERGY TECH DEV CO LTD