US-12625027-B2 - Test method, test apparatus, test system, and storage medium

US12625027B2US 12625027 B2US12625027 B2US 12625027B2US-12625027-B2

Abstract

A test method, a test apparatus, a test system, and a storage medium are provided, so as to solve the technical problem of how the leakage of a battery cell is detected. The test method of this embodiment of this application includes: (S 10 ) obtaining a CAN signal output by a gas sensor, where the gas sensor is disposed on a test box, and a battery cell is placed in the test box; (S 20 ) determining a gas concentration of a predetermined gas in the test box based on the CAN signal; and (S 30 ) sending a concentration exceedance signal when the gas concentration is higher than a concentration threshold.

Inventors

Hongyu Zheng
Shaoteng Ren
Si LIN

Assignees

CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

Dates

Publication Date: 20260512
Application Date: 20230703
Priority Date: 20221019

Claims (12)

1 . A test method used for battery cells, comprising: obtaining a CAN signal output by a gas sensor, wherein the gas sensor is disposed on a test box, and a battery cell is in the test box; determining a gas concentration of a predetermined gas in the test box based on the CAN signal; and sending a concentration exceedance signal when the gas concentration is higher than a concentration threshold, wherein determining the gas concentration of a predetermined gas in the test box comprises: reading data generated by the gas sensor based on the CAN signal; and determining the gas concentration of the predetermined gas based on data generated by the gas sensor that comprises: obtaining an alarm bit flag based on the gas concentration of the predetermined gas; under the condition that the alarm bit flag is 1, determining that the gas concentration of the predetermined gas is higher than the concentration threshold; and under the condition that the alarm bit flag is 0, determining that the gas concentration of the predetermined gas is lower than or equal to the concentration threshold.
2 . The test method according to claim 1 , wherein the test method comprises: modifying the alarm bit flag from 0 to 1 if the gas concentration of the predetermined gas is higher than the concentration threshold within a predetermined duration.
3 . The test method according to claim 1 , wherein sending a concentration exceedance signal when the gas concentration is higher than a concentration threshold comprises: when the gas concentration is higher than the concentration threshold, controlling a switch to close so as to cause a control circuit to send a boolean signal, and using the boolean signal as the concentration exceedance signal.
4 . The test method according to claim 1 , wherein the test method further comprises: sending an alarm signal based on the concentration exceedance signal, wherein the alarm signal is used for causing an alarm apparatus to give an alarm.
5 . The test method according to claim 4 , wherein the sending the alarm signal based on the concentration exceedance signal comprises: loading position information of the gas sensor from the concentration exceedance signal to form the alarm signal, and sending the alarm signal.
6 . A non-volatile computer-readable storage medium comprising computer executable instructions, wherein the computer executable instructions, when being executed by one or more processors, cause the processor(s) to execute the test method according to claim 1 .
7 . A test system, comprising: a gas sensor, wherein the gas sensor is disposed on a test box, and a battery cell is in the test box; and a control circuit board, wherein the control circuit board comprises a communication module, and the communication module is connected to the gas sensor and configured to: obtain a CAN signal output by the gas sensor, determine a gas concentration of a predetermined gas in the test box based on the CAN signal, and send a concentration exceedance signal when the gas concentration is higher than a concentration threshold, wherein the communication module is further configured to: read data of the gas sensor based on the CAN signal, and determine the gas concentration of the predetermined gas based on the data generated by the gas sensor; wherein, the communication module is further configured to: obtain an alarm bit flag of the data; under the condition that the alarm bit flag is 1, determine that the gas concentration of the predetermined gas is higher than the concentration threshold; and under the condition that the alarm bit flag is 0, determine that the gas concentration of the predetermined gas is lower than or equal to the concentration threshold.
8 . The test system according to claim 7 , wherein the gas sensor is configured to modify the alarm bit flag from 0 to 1 if the gas concentration measured is higher than the concentration threshold within a predetermined duration.
9 . The test system according to claim 7 , wherein the communication module is configured to: when the gas concentration is higher than the concentration threshold, control a switch of the control circuit board to close so as to cause a control circuit to send a boolean signal, and use the boolean signal as the concentration exceedance signal.
10 . The test system according to claim 7 , wherein the control circuit board further comprises an output module, wherein the output module is configured to send an alarm signal based on the concentration exceedance signal; and the test system further comprises an alarm controller, wherein the alarm controller is configured to control, based on the alarm signal, an alarm apparatus to give an alarm.
11 . The test method according to claim 10 , wherein the output module is further configured to: load position information of the gas sensor from the concentration exceedance signal to form the alarm signal, and send the alarm signal.
12 . The test system according to claim 7 , wherein the gas sensor is disposed on a side of the test box and located above a height midline of the side.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International application PCT/CN2023/082923 filed on Mar. 21, 2023 that claims priority to Chinese Patent Application No. 202211281900.9 filed on Oct. 19, 2022, which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of battery technologies, and in particular, to a test method, a test apparatus, a test system, and a storage medium. BACKGROUND Energy saving and emission reduction are crucial to the sustainable development of the automobile industry. Electric vehicles, with their advantages in energy conservation and emission reduction, have become an important part of sustainable development of the automobile industry. For electric vehicles, battery technology is an important factor in connection with their development. During tests in the battery research and development stage, battery cells are prone to failure or suffer from leakage caused by corrosion and rupture of the housing. When a battery cell suffers from leakage, moisture easily enters the battery cell, leaving the battery cell at risk of thermal runaway. Therefore, how the leakage of a battery cell is detected has become a technical problem to be solved. SUMMARY Embodiments of this application provide a test method, a test apparatus, a test system, and a storage medium, so as to solve the technical problem of how the leakage of a battery cell is detected. The test method of the embodiments of this application is used for battery cells. The test method includes: obtaining a CAN signal output by a gas sensor, where the gas sensor is disposed on a test box, and a battery cell is placed in the test box;determining a gas concentration of a predetermined gas in the test box based on the CAN signal; andsending a concentration exceedance signal when the gas concentration is higher than a concentration threshold. In the test method of the embodiments of this application, the concentration of the predetermined gas in the test box is monitored using the gas sensor disposed on the test box, and the concentration exceedance signal is sent when the gas concentration is higher than the concentration threshold. In this way, it is possible to determine, based on the gas concentration, whether the battery cell has a leakage failure. In some embodiments, the determining a gas concentration of a predetermined gas in the test box based on the CAN signal includes: reading internal data of the gas sensor based on the CAN signal; anddetermining the gas concentration of the predetermined gas based on the internal data. In this way, the gas concentration of the predetermined gas can be determined more accurately based on the internal data of the gas sensor. In some embodiments, the determining the gas concentration of the predetermined gas based on the internal data includes: obtaining an alarm bit flag of the internal data;under the condition that the alarm bit flag is 1, determining that the gas concentration of the predetermined gas is higher than the concentration threshold; andunder the condition that the alarm bit flag is 0, determining that the gas concentration of the predetermined gas is lower than or equal to the concentration threshold. In this way, the alarm bit flag can be used to determine whether the gas concentration exceeds the concentration threshold. In some embodiments, the test method includes: modifying the alarm bit flag from 0 to 1 if the gas concentration measured by the gas sensor is higher than the concentration threshold within a predetermined duration. In this way, limiting the measuring time can accurately determine whether the battery cell has leakage. In some embodiments, the sending a concentration exceedance signal when the gas concentration is higher than a concentration threshold includes: when the gas concentration is higher than the concentration threshold, controlling a switch to close so as to cause a control circuit to send a boolean signal, and using the boolean signal as the concentration exceedance signal. In this way, using the boolean signal as the concentration exceedance signal facilitates subsequent processing of the concentration exceedance signal and simplifies the processing. In some embodiments, the test method further includes: sending an alarm signal based on the concentration exceedance signal, where the alarm signal is used for causing an alarm apparatus to give an alarm. In this way, the alarm apparatus gives an alarm based on the alarm signal and can notify the relevant personnel of the leakage of the battery cell in a timely manner. In some embodiments, the sending an alarm signal based on the concentration exceedance signal includes: loading position information of the gas sensor from the concentration exceedance signal to form the alarm signal, and sending the alarm signal. In this way, the alarm signal has the position information of the gas sensor, such that a position of the