Lithium battery overdischarge test method

A test method and over-discharge technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of high cost and achieve the effect of strict testing

Inactive Publication Date: 2020-11-24
SUZHOU ANKAO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] 3. Although the existing test equipment can be modified to make the discharge voltage negative, the investment cost will be very high

Method used

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  • Lithium battery overdischarge test method

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Embodiment Construction

[0025] The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings. The present application can be implemented in many different forms, and is not limited to the implementation manner described in this embodiment. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of the present application, wherein the words indicating orientation such as up, down, left, and right are only for the positions of the structures shown in the corresponding drawings.

[0026] However, those skilled in the art may recognize that description of one or more of the specific details may be omitted, or other methods, components or materials may also be used. In some instances, some implementations were not described or described in detail.

[0027] In addition, the technical features and technical solutions described herein can also be com...

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Abstract

The invention discloses a lithium battery overdischarge test method which is characterized by comprising the following steps: connecting a first battery and a second battery in series to form a seriesbattery pack; performing constant-current charging on the first battery and the second battery to the charging termination voltage of the batteries by using the current I1, wherein I1 is the one-hourrate discharge current of the first battery; then respectively carrying out constant-voltage charging on the first battery and the second battery by using a charging termination voltage, stopping charging when the charging current is reduced to 0.05 I1 in the constant-voltage charging process, and standing for a period of time t1; discharging the first battery for 60 min at the constant current I1, then discharging the series battery pack composed of the first battery and the second battery for 30 min at the constant current I1, and detecting the voltage and the temperature of the first battery in real time in the discharging process. The test method provided by the invention is simple to operate and low in cost, and can meet the test requirement of continuously discharging the battery for 90min.

Description

technical field [0001] The present application relates to a lithium battery over-discharge testing method. Background technique [0002] In the past, our over-discharge test method for lithium batteries included the following two steps: [0003] 1) The battery to be tested is measured at 1I 1 When the current constant current charging reaches the charging termination voltage stipulated in the technical conditions of the enterprise, it turns to constant voltage charging until the charging current drops to 0.05I 1 stop charging when charging, and leave it for 1 hour after charging; [0004] 2) Put the battery at 1I 1 Current discharge for 90min. [0005] However, the discharge lower limit voltage of the existing single lithium battery charging and discharging equipment is 0V. For the lithium battery over-discharge test, there are the following three problems: [0006] 1. During the lithium battery over-discharge test, the test was terminated because the voltage reached 0V...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385
CPCG01R31/385
Inventor 陆正涛高金龙王爱淑许玉林
Owner SUZHOU ANKAO ENERGY
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