Method and device for controlling balance of current of rechargeable battery
A current equalization and rechargeable battery technology, applied in battery circuit devices, circuit devices, collectors, etc., can solve the problems of incomplete compensation of the difference in power, balanced charge or discharge of rechargeable batteries, etc., to improve utilization and life Effect
Active Publication Date: 2013-09-11
EMERSON NETWORK POWER CO LTD
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a current balance control method for a rechargeable battery in view of the defect that the balanced charging or discharging power of the rechargeable battery in the prior art is not enough to fully compensate for the difference in power
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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] Such as Figure 1B As shown, the hardware structure based on the current balance control method of the rechargeable battery of the present invention mainly includes a rechargeable battery module 1 composed of a plurality of rechargeable battery packs 11 connected in series, and each rechargeable battery pack 11 can be composed of Multiple rechargeable batteries are connected in parallel. It can be understood that the number of rechargeable battery packs 11 connected in series can be flexibly increased or decreased according to actual needs. Similarly, the number of rechargeable batteries co...
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The invention relates to a method and a device for controlling the balance of current of a rechargeable battery. The balance control method comprises the following steps of: detecting a working voltage V1 of each rechargeable battery group and calculating an average working voltage value V2 of all the rechargeable battery groups; and conducting a current balancer of the rechargeable battery group of which the working voltage V1 is less than a voltage value V3 so as to provide compensation for an electric quantity C, wherein V3=V2-delta, and delta is a set voltage difference value; C=A / B, wherein A is a balanced electric quantity value at previous N times of charging or discharging, and B is a total charging quantity or a total discharging quantity at one of the previous N times of charging or discharging; and N is a natural number. As the current balance control is executed dynamically according to a historic balanced electric quantity and a total charging or discharging quantity, the difference between a lowest voltage and an average voltage can be reduced effectively, and the requirement that all the rechargeable battery groups can be fully charged or totally discharged at the same time can be met; therefore, the utilization rate of a rechargeable battery can be improved and the service life of the rechargeable battery can be prolonged effectively.
Description
technical field [0001] The present invention relates to a current balance control method and device, more specifically, to a current balance control method and device for a rechargeable battery. Background technique [0002] The balanced charging or discharging of rechargeable batteries has always been a relatively important part of the application field of rechargeable batteries. At present, most of the occasions of industrial and commercial rechargeable batteries need to connect rechargeable batteries in series. In this way, it is hoped that all rechargeable batteries in series are fully charged and discharged at the same time. Discharging the battery, under this working condition, the rechargeable battery has the longest service life and the highest utilization efficiency. However, due to the limitations of the manufacturing process, the characteristics of each group of rechargeable batteries will be inconsistent. If the charging or discharging of the rechargeable batteri...
Claims
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IPC IPC(8): H02J7/00
Inventor 易小强赵龙刘波
Owner EMERSON NETWORK POWER CO LTD