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Lithium ion battery charging method and device and computer storage medium

A lithium-ion battery, charging method technology, applied in battery circuit devices, circuit devices, secondary batteries, etc., can solve the problems of reducing the use efficiency of battery packs, cycle life, poor consistency, etc.

Inactive Publication Date: 2020-02-14
蜂巢能源(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, after dividing the capacity of a batch of lithium-ion batteries, the charging method of constant current and constant voltage is usually used to charge the batch of lithium-ion batteries. However, with this charging method, the open circuit voltage (OCV, Open Circuit Voltage) ) consistency is not good, thus reducing the service efficiency and cycle life of the battery pack when these lithium-ion batteries are assembled into a battery pack

Method used

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  • Lithium ion battery charging method and device and computer storage medium
  • Lithium ion battery charging method and device and computer storage medium
  • Lithium ion battery charging method and device and computer storage medium

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Embodiment Construction

[0040] In order to understand the present invention, the related technologies of lithium-ion batteries are briefly introduced below.

[0041] Lithium-ion battery refers to Li + The intercalation compound is a secondary battery with positive and negative electrodes. Usually, the positive electrode uses the lithium compound Li x CoO 2 , Li x NiO 2 , Li x MnO 2 etc.; the negative electrode uses lithium-carbon interlayer compound Li x C 6 . The production process of lithium-ion batteries, such as figure 1 As shown, the production process of lithium-ion batteries is from raw material inspection to sealing inspection; chemical composition and capacity measurement is the activation and capacity measurement of the fabricated lithium-ion batteries. Among them, the formation refers to the first charging of the completed lithium-ion battery to activate the lithium-ion battery, that is to say, the completed lithium-ion battery can only be charged and discharged normally after th...

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Abstract

The invention discloses a lithium ion battery charging method and device and a computer storage medium. The method comprises the following steps of: carrying out constant-current charging on a lithiumion battery by adopting a first set current value, acquiring a first charging capacity of the lithium ion battery when the current voltage of the lithium ion battery reaches a set voltage, acquiringa second charging capacity of the lithium ion battery based on the first charging capacity of the lithium ion battery, and charging the lithium ion battery until the capacity of the lithium ion battery reaches the second charging capacity, and stopping charging the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery manufacturing, in particular to a lithium-ion battery charging method, device and computer storage medium. Background technique [0002] With the development of battery technology, Li-ion has been widely used due to its high energy density and long cycle life. Lithium-ion batteries are in increasing demand, especially in the field of electric vehicles. However, due to the complex production process of lithium-ion batteries, and the performance is greatly affected by the external environment, it is necessary to perform chemical composition and volumetric treatment on the same batch of lithium-ion batteries produced to sort out lithium-ion batteries with different capacity specifications. After the capacity separation, the lithium-ion battery needs to be charged to achieve the state of charge (SOC, State Of Charge) required by the customer. At present, after dividing the capacity of a ...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525H02J7/00
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 宋超
Owner 蜂巢能源(武汉)有限公司
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