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A battery set-making and screening method

A screening method and battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of different voltage capacities and inability to match groups, etc., and achieve the effects of improving service life, reducing costs, and improving accuracy

Inactive Publication Date: 2016-02-10
SUZHOU DURAPOWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem in the prior art that the voltage and capacity of the battery cells are different under different temperatures or environments, the assembly process cannot be matched and grouped, the present invention proposes a battery group screening method

Method used

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  • A battery set-making and screening method

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Experimental program
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Effect test

Embodiment 1

[0033] The specific battery pack screening method includes the following steps:

[0034] 1. Capacity classification, through charging and discharging the battery, the discharge capacity of the battery can be obtained, and the data can be exported to an EXCEL table.

[0035] 2. Measure the voltage internal resistance. After removing from the cabinet, use the voltage internal resistance tester to test within the specified time, and export the data to an EXCEL form.

[0036] 3. Measure the voltage internal resistance after shelving, use the voltage internal resistance tester to test the voltage internal resistance after shelving at the specified time, and export the data to the EXCEL form.

[0037] 4. Calculate the pressure difference and convert the capacity, and organize the data in the EXCEL table.

[0038] 5. Grading. According to the grading standard, the sorted data is separated into different grades and put into storage.

[0039] 6. Pick up the shipment, pick up the batt...

Embodiment 2

[0058] The method for screening battery packs includes the following steps:

[0059] 1. The capacity-distributing equipment is equipped with temperature monitoring, and the temperature of each battery is exported in the data table.

[0060] 2. The formula can convert the capacity at different temperatures into the normal temperature capacity at 25°C.

[0061] 3. Data processing requires volume software, computer and office software.

[0062] 4. The content analysis software has the function of data export.

[0063] 5. The voltage internal resistance tester is connected to the computer, and the customized software is used to convert and export to the EXCEL form.

[0064] 6. The grading standard is the standard for judging qualified products within the enterprise, which is unified with the requirements for matching groups.

[0065] 7. Batteries of the same level must meet the matching requirements, so there is no need to consider the capacity difference.

[0066] 8. There is a...

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Abstract

The invention provides a battery set-making and screening method. The method comprises a step of charging and discharging batteries, obtaining the discharge capacities of the batteries and exporting the discharge capacity data; a step of using a voltage internal resistance tester to test the voltage internal resistance in set time and exporting the data; a step of using the voltage internal resistance tester to test the voltage internal resistance after set-time standing and exporting the data; a step of voltage difference calculation and capacity conversion; a step of equal-grade assembly in which the batteries of the same grade are collected for assembly after capacity conversion. Through the capacity conversion method, the problem that the environmental factors such as standing and temperature influence the battery capacity is solved and it is guaranteed that batteries put in storage all have the standard capacity; the complicated operation of set making is simplified, so that the cost can be reduced and the production efficiency is increased; the accuracy in the battery assembly process is improved and the service life of the batteries is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of lithium batteries, and more specifically relates to a method for screening battery packs. Background technique [0002] Different batches of batteries have some differences between batches due to the different storage time of grading, which also includes the influence of ambient temperature. The capacity of lithium-ion batteries is affected by temperature and changes in four seasons. The capacity obtained by different temperatures is also different. When the ambient temperature is low (winter), the capacity derived from the device is low, and when the ambient temperature is high (summer), the capacity derived from the device is high. In this way, the actual capacity of the batteries in the two periods is very different, and they cannot be used in groups directly. [0003] Because of the difference between the position of the device and the contact between the fixture and the resistance of the battery itself, the a...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 孟淇王剑
Owner SUZHOU DURAPOWER TECH
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