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Battery selecting method

A screening method and battery technology, applied in sorting and other directions, can solve problems such as the screening of different single cells, and achieve the effect of improving battery life and safety.

Active Publication Date: 2015-05-06
SHANGHAI SINOPOLY JIAHUA BATTERY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome that the battery screening method in the prior art only screens batteries by static parameters such as static pressure difference, static capacity difference or AC internal resistance, so it cannot quickly and accurately screen different cells. Based on the defects of bulk battery screening, a battery screening method is proposed

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Embodiment Construction

[0037] Hereinafter, preferred embodiments of the present invention are given in conjunction with the accompanying drawings to describe the technical solutions of the present invention in detail, but the present invention is not limited to the scope of the described embodiments.

[0038] Such as figure 1 As shown, the battery screening method of a preferred embodiment of the present invention includes the following steps:

[0039] S 1001 , Perform M full charge and discharge cycles on A battery, measure and record the discharge capacity of each battery in each full charge and discharge cycle. The discharge capacity of the a battery at the m th full charge and discharge cycle is recorded as H am , Where A> 2. M> 0, and a traversal satisfies 0 <a≤A integer, m traversal satisfies 0 <m≤M integer;

[0040] S 1002 Calculate the average value of the discharge capacity of the A battery in the m-th full charge and discharge cycle as H m ;

[0041] S 1003 , According to the formula y am =|H am -...

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Abstract

The invention discloses a battery selecting method comprising steps of performing fully charging and discharging circles and measuring capacities of a plurality of batteries; calculating the average battery capacity value and calculating relative deviations; removing batteries that have large discharging capacity deviations; performing charging and discharging processes, and measuring voltages in the processes; calculating the average voltage value and calculating relative deviations; and selecting batteries with good consistency. According to the selecting method provided by the invention, by selecting firstly according to discharging capacities of batteries, and then by performing charging and discharging tests close to actual working conditions for the batteries and measuring voltages, batteries with good consistency are selected rapidly and accurately, thereby raising the accuracy of battery selecting, improving battery pack security, and prolonging battery service lifetime.

Description

Technical field [0001] The invention relates to a battery screening method. Background technique [0002] In recent years, with the further aggravation of the traditional fossil energy crisis and the rapid development of the new energy industry, the application of power batteries has made great progress, especially in the fields of electric vehicles. Due to the differences in battery raw materials, manufacturing processes, components and the microenvironment used, there will inevitably be a certain difference between single batteries. The more batteries used in combination, the more obvious the difference between batteries. The greater the impact on the service life and safety performance of the group. Therefore, it is very important to improve the consistency of assembled batteries through appropriate screening methods. [0003] In the consistency of the battery, the large difference in the capacity of the battery will make the discharge depth of different batteries have a large...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/344
Inventor 赵青松马紫峰赵政威
Owner SHANGHAI SINOPOLY JIAHUA BATTERY TECH