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Battery screening method and device, and computer-readable storage medium

A screening method and battery technology, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as increasing production costs and prolonging production cycles

Pending Publication Date: 2019-10-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above screening method requires manual participation in the test, which increases the production cost, and the repeated charge and discharge detection of the battery prolongs the production cycle

Method used

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  • Battery screening method and device, and computer-readable storage medium
  • Battery screening method and device, and computer-readable storage medium
  • Battery screening method and device, and computer-readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The embodiment of the present application provides a battery screening method, such as figure 1 As shown, the method may specifically include:

[0034] Step 101: Control the charging unit to charge at least two sample batteries, and obtain the capacity value corresponding to each sample battery at at least one voltage node during the charging process;

[0035] Step 102: Based on the capacity values ​​of the at least two sample batteries, determine a capacity standard value of the at least one voltage node;

[0036] Step 103: Control the charging component to charge at least one test battery, and acquire the capacity value corresponding to each test battery at the at least one voltage node during the charging process;

[0037] Step 104: Based on the capacity standard value and the capacity value of the at least one test battery, screen the at least one test battery to screen out unqualified batteries in the at least one test battery.

[0038] Here, the screening object...

Embodiment 2

[0054] The embodiment of the present application provides a battery screening method, such as figure 2 As shown, the method may specifically include:

[0055] Step 201: Control the charging unit to charge at least two sample batteries, and obtain the capacity value corresponding to each sample battery at at least one voltage node during the charging process;

[0056] Here, at least one voltage node includes only one voltage node, such as a cut-off voltage node.

[0057] Charging the sample battery and the test battery may include: controlling the charging unit to charge the sample battery and the test battery with a constant current; or to charge the sample battery and the test battery with a changing current. In the process of charging from the initial voltage to the cut-off voltage, the battery capacity increases with the increase of the voltage.

[0058] No matter which charging current is selected, the charging current form of the sample battery and the test battery sho...

Embodiment 3

[0070] The embodiment of the present application provides a battery screening method, such as image 3 As shown, the method may specifically include:

[0071] Step 301: Control the charging unit to charge at least two sample batteries, and obtain the capacity value corresponding to each sample battery at at least one voltage node during the charging process;

[0072] Here, when at least one voltage node includes at least two voltage nodes, it includes a voltage node between the start voltage and the cut-off voltage and the cut-off voltage. For example, the starting voltage is 3V, the cut-off voltage is 4.1V, and the voltage nodes between the two are 3.4V, 3.6V, and 3.8V, including 4 voltage nodes in total.

[0073] Charging the sample battery and the test battery may include: controlling the charging unit to charge the sample battery and the test battery with a constant current; or to charge the sample battery and the test battery with a changing current. In the process of c...

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Abstract

The embodiment of the application discloses a battery screening method and device, and a computer-readable storage medium. The method comprises: controlling a charging component to perform charging operation on at least two sample batteries and acquiring a capacity value corresponding to each sample battery at at least one voltage node during the charging process; on the basis of the capacity values of the at least two sample batteries, determining a capacity standard value of the at least one voltage node; controlling the charging component to perform charging operation on at least one testedbattery and acquiring a capacity value corresponding to each tested battery at at least one voltage node during the charging process; and according to the capacity standard value and the capacity value of the at least one tested battery, screening the at least one tested battery to screen a disqualified battery in the at least one tested battery. Therefore, battery screening can be completed onlyby charging the tested battery once; repeated charging and discharging of the battery are avoided; the production cycle is shortened; and the screening efficiency is improved.

Description

technical field [0001] The present application relates to battery manufacturing technology, in particular to a battery screening method, device and computer-readable storage medium. Background technique [0002] Formation is an important process in the production process of lithium-ion batteries by activating the positive and negative active materials inside the lithium-ion battery through a certain charging and discharging method to charge the battery. Lithium-ion batteries need to be measured after formation to pick out unqualified products. For example, after using a small current for a preset period of time (such as 8h), test whether the voltage of the battery reaches the target value (such as 4.1V). There is also the time required from the formation to the cut-off voltage (such as 4.2V). If the required time is not within the standard range value (such as 10h±5%), it is considered a substandard product. Other testing techniques record that after the battery is formed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385
CPCG01R31/3865
Inventor 谢红斌张加亮张俊
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD