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SOC estimation method for addressing different capacity needs of batteries

A capacity and battery technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problem of inability to quantify the battery percentage, and achieve the effect of saving costs and avoiding deep charging and deep discharging.

Pending Publication Date: 2019-02-15
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention can estimate the SOC of the battery pack, it cannot quantify the percentage of the upper and lower limit usage of the battery for different usage capacities of the battery

Method used

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  • SOC estimation method for addressing different capacity needs of batteries
  • SOC estimation method for addressing different capacity needs of batteries
  • SOC estimation method for addressing different capacity needs of batteries

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] Such as figure 1 As shown, the present invention provides a kind of SOC estimation method that solves the different use capacity demands of battery, comprises the following steps:

[0028] S1, obtain the nominal voltage window of the cell, and determine the nominal capacity of the cell through the nominal voltage window;

[0029] S2. Determine the actually used battery capacity according to the voltage range that the battery actually needs to use, a...

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Abstract

The invention discloses an SOC estimation method for addressing different use capacity needs of batteries, including the following steps: acquiring a nominal voltage window of a core, and determiningthe nominal capacity of the core through the nominal voltage window; determining the real use core capacity according to the real voltage range needed by the core, wherein the real use core capacity should be less than the nominal capacity of the core; determining the real SOC range according to the real use core capacity, namely, determining SOC(real); and converting SOC(real) into SOC(use). Thepercentage of upper and lower limit use capacity of battery cores can be quantified, deep charging and deep discharging of batteries can be avoided, and the service life of batteries can be prolonged.

Description

technical field [0001] The invention relates to the technical field of new energy power batteries, and in particular to an SOC estimation method for solving different capacity demands of batteries. Background technique [0002] As we all know, frequent deep charging and deep discharging of the power battery will accelerate the capacity decay of the battery cell, which has a great impact on the cycle life. The capacity decay of the battery directly affects the power and economy of new energy electric vehicles. This has become a complaint of new energy electric vehicles. One of the main aspects of the problem. [0003] In order to solve this problem, the most commonly used solution in the industry is to compress the upper and lower limit voltage windows of the battery, so as to avoid deep charging and deep discharging of the battery. For example, the nominal voltage window of the battery is 3.0-4.2V, and the corresponding SOC range is 0%-100%. In order to avoid the cycle life...

Claims

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Application Information

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IPC IPC(8): G01R31/3835
Inventor 严丽陈斌张传龙徐强李平周莎唐俊伟
Owner 桑顿新能源科技(长沙)有限公司