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Method for sorting degrees of self-discharging of lithium ion batteries

A lithium-ion battery and self-discharge technology, which is applied in sorting and other directions, can solve the problems of large errors in the self-discharge consistency of lithium-ion batteries, and cannot satisfy battery manufacturers and users, so as to ensure service life, improve market application prospects, The effect of significant production practice significance

Inactive Publication Date: 2013-04-03
TIANJIN LISHEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-discharge consistency of lithium-ion batteries selected by this selection method has a large error, which cannot meet the needs of battery manufacturers and users.

Method used

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  • Method for sorting degrees of self-discharging of lithium ion batteries
  • Method for sorting degrees of self-discharging of lithium ion batteries
  • Method for sorting degrees of self-discharging of lithium ion batteries

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Embodiment Construction

[0021] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] see figure 1 , the invention provides a sorting method for the self-discharge degree of lithium-ion batteries, which

[0023] Step 1: Place the multiple batteries to be sorted at room temperature (for example, 20°~30° temperature), and then discharge the multiple batteries to the preset state of charge SOC (ie, the depth of charge of the battery) , respectively measure the first test voltage of multiple batteries;

[0024] Step 2: continue to place the plurality of batteries at a preset temperature (generally a high temperature of about 40°C) for a preset time, and then measure the second test voltage of the plurality of batteries respectively;

[0025] Step 3: Compare the difference between the first test voltage and the second tes...

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Abstract

The invention discloses a method for sorting degree of self-discharging of lithium ion batteries. The method comprises the following steps: Step I, a plurality of batteries to be sorted are placed at the room temperature and respectively are discharged to a preset charge state, and the first test voltage of the batteries are respectively measured; Step II, preset time of the plurality of batteries is continuously set at a preset temperature, and the second test voltage of the plurality of batteries is respectively measured; and Step III, a value difference between the first test voltage and the second test voltage of each battery is compared with the range of a preset battery value difference, batteries within the preset battery value difference are sorted, and the sorted batteries are batteries with the same self-discharging performance. The method for sorting the degree of the self-discharging of the lithium ion battery can accurately and reliably sort the batteries with coincident self-discharging performance, so as to effectively match the batteries with the same self-discharging performance to form battery groups.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for sorting the self-discharge degree of lithium-ion batteries. Background technique [0002] At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. And large and medium-sized electric equipment such as electric tools. [0003] The self-discharge of the battery refers to the loss of battery capacity caused by the internal spontaneous reaction when the battery and the primary battery are not connected to the external circuit. Strictly speaking, all current batteries have self-discharge, but the degree is different. [0004] For lithium-ion batteries, although their self-discharge is very small, since the current lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07C5/344
Inventor 刘江张龙
Owner TIANJIN LISHEN BATTERY
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