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A detection method for a power lithium-ion battery

A technology of lithium ion battery and detection method, which is applied to measurement devices, instruments, etc., can solve problems such as battery failure, pressure rise, explosion, etc., and achieve the effects of high accuracy, simple operation and simple method.

Active Publication Date: 2018-04-03
河南比得力高新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, before combining lithium-ion batteries, only the electrical performance data of lithium-ion batteries, such as capacity, internal resistance, voltage, and platform, are examined. However, for batteries, internal defects such as burrs, dust, moisture, etc. cause internal gas production and pressure rise. Hidden dangers cannot be discovered in a timely and effective manner
Often cause the battery to be assembled and used for a period of time, there will be safety hazards such as battery failure due to poor battery consistency, or even fire and explosion.

Method used

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  • A detection method for a power lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A detection method for a power lithium-ion battery, comprising the steps of:

[0024] Step 1: Put the power lithium-ion battery injected with electrolyte into the online thickness measurement system to detect its thickness, and record the thickness of the power lithium-ion battery as H 1 ;

[0025] Step 2: Put the power lithium-ion battery that has passed the online thickness measurement system into the battery formation cabinet to form the battery. After the formation is completed, place the power lithium-ion battery in the online thickness measurement system for testing for the second time, and record the power at this time The thickness of the lithium-ion battery is H 2 ;

[0026] Step 3: The thickness H of the power lithium-ion battery described in step 2 2 Subtract the thickness H of the power lithium-ion battery described in step one 1 get ΔH;

[0027] Step 4: When the value of ΔH is 0.10mm, it is a qualified power lithium-ion battery;

[0028] Step 5: Make ...

Embodiment 2

[0031] A detection method for a power lithium-ion battery, comprising the steps of:

[0032] Step 1: Put the power lithium-ion battery injected with electrolyte into the online thickness measurement system to detect its thickness, and record the thickness of the power lithium-ion battery as H 1 ;

[0033] Step 2: Put the power lithium-ion battery that has passed the online thickness measurement system into the battery formation cabinet to form the battery. After the formation is completed, place the power lithium-ion battery in the online thickness measurement system for testing for the second time, and record the power at this time The thickness of the lithium-ion battery is H 2 ;

[0034] Step 3: The thickness H of the power lithium-ion battery described in step 2 2 Subtract the thickness H of the power lithium-ion battery described in step one 1 get ΔH;

[0035] Step 4: When the value of ΔH is 0.15mm, it is a qualified power lithium-ion battery;

[0036] Step 5: Make ...

Embodiment 3

[0039] A detection method for a power lithium-ion battery, comprising the steps of:

[0040] Step 1: Put the power lithium-ion battery injected with electrolyte into the online thickness measurement system to detect its thickness, and record the thickness of the power lithium-ion battery as H 1 ;

[0041] Step 2: Put the power lithium-ion battery that has passed the online thickness measurement system into the battery formation cabinet to form the battery. After the formation is completed, place the power lithium-ion battery in the online thickness measurement system for testing for the second time, and record the power at this time The thickness of the lithium-ion battery is H 2 ;

[0042] Step 3: The thickness H of the power lithium-ion battery described in step 2 2 Subtract the thickness H of the power lithium-ion battery described in step one 1 get ΔH;

[0043] Step 4: When the value of ΔH is 0.20mm, it is a qualified power lithium-ion battery;

[0044] Step 5: Make ...

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Abstract

The invention belongs to a detection method for a power lithium ion battery. The method comprises the following steps that 1) the power lithium ion battery injected with an electrolyte is placed in an online thickness measuring system to measure the thickness H1 of the battery; 2) the battery is placed in a battery formation cabinet to form the battery, and after formation, the power lithium ion battery is placed in the online thickness measuring system to measure the thickness H2 of the battery; 3) the thickness H1 is subtracted from the thickness H1 to obtain deltaH, 4) when the value of deltaH is not lower than 0.10mm and not greater than 0.20mm, the power lithium ion battery is determined to be qualified; and 5) the qualified power lithium ion battery in the step 4) is laid and sorted by capacity to form a finished product of the power lithium ion battery. The detection method has the advantages that the method is simple, operation is simple, unqualified power lithium ion batteries can be screened rapidly, and the accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of detection of power lithium-ion batteries, and in particular relates to a detection method of power lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the characteristics of high output voltage, high specific energy, stable discharge voltage and long cycle life. Therefore, lithium-ion batteries have been widely used in notebook computers, digital cameras, and mobile phones. And it has been applied more and more in the field of power and energy storage. In the field of power and energy storage, there are a large number of batteries connected in series and parallel, so the consistency requirements for lithium-ion batteries are very high. [0003] At present, before combining lithium-ion batteries, only the electrical performance data of lithium-ion batteries, such as capacity, internal resistance, voltage, and platform, are examined. However, for batteries, internal defects suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/08
CPCG01B21/08
Inventor 朱全健苑泽保张铭
Owner 河南比得力高新能源科技有限公司