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Battery pack equalization method

An equalization method and technology of battery packs, applied in charge equalization circuits, battery circuit devices, arrangement of multiple synchronous batteries, etc., can solve problems affecting the use safety and maximum available capacity of series battery packs, so as to avoid voltage and capacity balance Inconsistent, operating life-extending effects

Pending Publication Date: 2018-11-13
安徽汉星储能技术有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a battery pack equalization method to solve the problem in the prior art that the battery packs in the prior art are affected by the inconsistency of the single cells and the safety and maximum available capacity of the series battery packs

Method used

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Embodiment Construction

[0035] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0036] A battery pack equalization method such as figure 1 shown, including the following steps:

[0037] Step 1. Determine the information matrix of the battery pack, the information matrix includes the state of charge SOC of each battery at each time t time i,t , the current voltage value V i , the depth of discharge DOC at the current moment i , battery health SOH i , Rated capacitance CP i , equalization time EQT i and equalization current EQI i , the time at...

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Abstract

The invention discloses a battery pack equalization method, comprising the following steps: determining an information matrix of battery packs, obtaining a distance vector and a distance matrix according to the information matrix, judging suspected battery packs requiring equalization according to the distance vector and the distance matrix, further determining battery packs requiring discharge equalization and battery packs requiring charge equalization among the suspected battery packs requiring equalization, and ultimately performing discharge or charge equalization on batteries requiring equalization through a battery equalization module. The battery pack equalization method disclosed by the invention can detect the batteries requiring equalization and equalize the batteries requiringequalization, solve a problem that disagreement of battery cells in battery packs influences the use safety and maximum available capacity of a series battery pack system and prolong service life of the battery packs.

Description

technical field [0001] The invention relates to the technical field of battery pack equalization, in particular to a battery pack equalization method. Background technique [0002] Due to the influence of various factors in the production process of the battery, there are certain differences in the single battery itself. This difference is usually manifested as the difference in characteristics such as capacity, internal resistance, self-discharge rate, voltage platform, charge-discharge curve, etc., namely for inconsistencies between cells. Vehicle power batteries are generally required to be used in series and parallel groups. The consistency of the battery pack directly affects the cycle life and safety performance of the battery pack, so it is still very important. [0003] However, in the prior art, common battery grouping methods mainly include a single-parameter grouping method, a multi-parameter grouping method, a dynamic characteristic curve grouping method, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0014
Inventor 魏自红
Owner 安徽汉星储能技术有限公司
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