An active equalizing system and an equalizing method of power lithium ion battery

A lithium-ion battery and active equalization technology, which is applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of lithium-ion battery packs not being fully charged normally, overcharging, etc., to prolong the working time and service life, Extend the service life and avoid the effect of over-discharge

Inactive Publication Date: 2011-08-31
无锡凌翔管理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the charging process, the lithium-ion battery that is discharged first will be fully charged again, so that the phenomenon of overcharging will occur, so that the entire lithium-ion battery pack cannot be fully charged normally.

Method used

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  • An active equalizing system and an equalizing method of power lithium ion battery
  • An active equalizing system and an equalizing method of power lithium ion battery

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0023] Such as figure 1 As shown: the present invention includes a battery module 1, a negative bus 2, a positive bus 3, a battery pack voltage sampling module 4, a balance controller 5, a power balance module 6, a measurement switch control bus 7 and a single battery voltage measurement module 8.

[0024] Such as figure 1 As shown: the battery module 1 is composed of 2n single cells in series, the positive terminal of the battery module 1 is grounded, the negative terminal of the battery module 1 is connected to the input terminal of the balance controller 5 through the battery pack voltage sampling module 4, and the battery pack The voltage sampling module 4 samples the voltage of the battery module 1, and inputs the voltage value of the battery module 1 into the balance controller 5; the balance controller 5 is a single-chip microcomputer or other microproc...

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PUM

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Abstract

The invention relates to an active equalizing system and an equalizing method of power lithium ion battery. The equalizing system comprises a battery module, which is connected with an input end of an equalization controller through a battery pack voltage sampling module; any single battery in the battery module is connected with the input end of the equalization controller through a single battery voltage measuring module and is connected with an electric quantity equalizing module, which is connected with the input end of the equalization controller; and when the single battery voltage values and an average voltage value of the single batteries in the battery module correspond to the voltage relations preset by the equalization controller, the equalization controller outputs equalizing control signals to the electric quantity equalizing module and realizes the active equalization of the corresponding single batteries in the battery, thereby making the single battery voltages and the average voltage value of the single batteries in the battery module match the voltage relation preset by the equalization controller. The active equalizing system and equalizing method are convenient for usage and operation, capable of prolonging the service lifetime of the battery, highly flexible, safe and reliable.

Description

technical field [0001] The invention relates to an active equalization system and an equalization method, in particular to an active equalization system and an equalization method for a power lithium-ion battery, belonging to the technical field of power lithium-ion batteries. Background technique [0002] Power lithium-ion batteries are usually connected in series. Since each single lithium-ion battery is not exactly the same in terms of manufacturing, initial capacity, voltage, internal resistance, and temperature of each single lithium-ion battery in the lithium-ion battery pack, the use of During the process, it will cause overcharge and overdischarge of a single lithium-ion battery. In severe cases, the capacity of individual lithium-ion batteries will be lower than that of other lithium-ion batteries. The battery is discharged first. In order to protect the power lithium-ion battery connected in series, the discharge of the entire battery pack has to be stopped, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 谈正言
Owner 无锡凌翔管理咨询有限公司
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