CN-121995252-A - Battery pack offline testing system and method

CN121995252ACN 121995252 ACN121995252 ACN 121995252ACN-121995252-A

Abstract

The invention discloses a battery pack offline testing system and method. The system comprises a control module, an airtight test module, an automatic plug module, an off-line test module and a control module, wherein the airtight test module is respectively connected with a battery pack and the control module and is configured to detect the air tightness of the battery pack, the automatic plug module is connected with the control module and is configured to respectively dock the battery pack at a test station with a high-voltage test plug, a low-voltage communication test plug and the airtight test module, the off-line test module is configured to execute off-line full project test, and the control module is configured to perform off-line full project test through the off-line test module and perform air tightness detection of the battery pack through the airtight test module at the same time of performing off-line full project test. The automatic butt joint of the battery pack and the plug is realized through the automatic plug module, the test automation is realized, and the test efficiency is improved. And in the same test station, the test of the whole project of the battery pack in the off-line and the air tightness detection are simultaneously carried out, so that the test efficiency is improved.

Inventors

CHEN CHAO
ZHOU JIHONG
XU TONGRUI
SHU WEI
MU LAN

Assignees

苏州清研精准汽车科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260319

Claims (10)

1. A battery pack offline test system, comprising: a control module; the airtight testing module is respectively connected with the battery pack and the control module and is configured to detect the air tightness of the battery pack; The automatic plug-in module is connected with the control module and is configured to respectively dock the battery pack at the test station with the high-voltage test plug, the low-voltage communication test plug and the airtight test module; the off-line test module is respectively connected with the high-voltage test plug and the low-voltage communication test plug and the control module and is configured to execute off-line full-project test; The control module is configured to perform an off-line full item test by the off-line test module and perform an air tightness detection of the battery pack by the air tightness test module at the same time of performing the off-line full item test.
2. The battery pack off-line testing system according to claim 1, wherein the automatic plug module comprises: A mobile unit; The quick-insertion placing rack is arranged on one side of the testing station and is configured to place the high-voltage testing plug and the low-voltage communication testing plug; One end of the quick-change module is detachably connected with the mechanical arm of the mobile unit, and the other end of the quick-change module is detachably connected with the high-voltage test plug or the low-voltage communication test plug under the control of the control module in a time-sharing manner; The image acquisition unit is fixed at one end of the mechanical arm, connected with the mobile unit, of the quick-change module, is connected with the control module, and is configured to acquire first image information when the battery pack is in butt joint with the high-voltage test plug, acquire second image information when the battery pack is in butt joint with the low-voltage communication test plug, and acquire third image information when the battery pack is in butt joint with the airtight test module; The control module is configured to control the mobile unit to move to dock the battery pack with the high-voltage test plug according to the first image information, control the mobile unit to move to dock the battery pack with the low-voltage communication test plug according to the second image information, and control the mobile unit to move to dock the battery pack with the airtight test module according to the third image information.
3. The battery pack off-line testing system according to claim 2, wherein the automatic plugging module further comprises a balancing hanging module corresponding to the quick plugging rack one to one, the balancing hanging module is installed on a beam of the corresponding quick plugging rack, the balancing hanging module comprises a plurality of balancing hanging pieces, and cantilever ends of the balancing hanging pieces are used for penetrating and supporting a wire harness connected with the high-voltage testing plug or a wire harness connected with the low-voltage communication testing plug.
4. The battery pack off-line testing system according to claim 1, wherein the off-line testing module comprises a multimeter unit, a capacitor unit, a battery tester, a safety gauge tester, an equipotential tester and a collision simulation unit; The universal meter unit is respectively connected with the battery pack and the control module and is configured to collect the total voltage of the battery pack; The capacitor unit is connected between the positive electrode end and the negative electrode end of the battery pack and is also connected with the control module, and the control module is used for acquiring the voltages at two ends of the capacitor unit when the battery pack is precharged; The battery tester is respectively connected with the battery pack and the control module and is configured to detect the internal resistance of the battery pack; the safety gauge tester is respectively connected with the battery pack and the control module and is configured to detect insulation resistance between the positive end of the battery pack and the shell of the battery pack and insulation resistance between the negative end of the battery pack and the shell of the battery pack; the equipotential tester is respectively connected with the battery pack and the control module and is configured to detect insulation impedance of a grounding end of the battery pack; The collision simulation unit is respectively connected with the battery pack and the control module and is configured to send a collision signal to the battery pack so that the battery pack responds to the collision signal and feeds back a collision feedback signal to the control module.
5. The battery pack offline test system of claim 1, further comprising a scanning module; The scanning module is configured to scan the identification of the battery pack under the control of the control module to acquire basic information of the battery pack and transmit the basic information to the control module, wherein the basic information comprises the identification information of the battery pack.
6. The battery pack offline test system according to claim 1, wherein the battery pack includes a plurality of unit batteries and a battery management system, and the offline test module further includes a communication unit; The control module is connected with the battery management system through the communication unit, is configured to obtain the voltage of each single battery and the temperature of each single battery through the battery management system, and is further configured to determine a module differential pressure and a module differential temperature according to the voltage of each single battery and the temperature of each single battery, wherein the module differential pressure is the difference between the maximum value and the minimum value of the voltage in each single battery, and the module differential pressure is the difference between the maximum value and the minimum value of the temperature in each single battery.
7. A battery pack offline testing method for controlling the battery pack offline testing system according to any one of claims 1-6, and executed by a control module, comprising: The automatic plugging module is controlled to respectively dock the battery pack positioned at the testing station with the high-voltage testing plug, the low-voltage communication testing plug and the airtight testing module; controlling an offline testing module to execute offline full project testing and acquire all offline testing data, and simultaneously controlling the airtight testing module to detect the air tightness of the battery pack and acquire air tightness detection data; And generating a detection report according to the offline test data and the airtight detection data.
8. The battery pack off-line testing method according to claim 7, wherein the battery pack off-line testing system further comprises an in-place detection module and a scanning module, and the in-place detection module is arranged at the testing station; Before the automatic plugging module is controlled to respectively dock the battery packs positioned at the testing stations with the high-voltage testing plug, the low-voltage communication testing plug and the airtight testing module, the automatic plugging module further comprises: And after receiving the in-place detection signal, controlling the scanning module to scan the identification of the battery pack to acquire basic information of the battery pack, wherein the in-place detection signal is generated when the in-place detection module detects that the battery pack is positioned at the test station, and the basic information comprises the identification information of the battery pack.
9. The battery pack offline test method according to claim 7, wherein the battery pack comprises a battery management system and a communication unit, the control module is connected with the battery management system through the communication unit, the offline test module comprises a universal meter unit, a capacitance unit, a battery tester, a safety standard tester, an equipotential tester and a collision simulation unit, the universal meter unit is respectively connected with the battery pack and the control module, the capacitance unit is connected between the positive end and the negative end of the battery pack and is also connected with the control module, the battery tester is respectively connected with the battery pack and the control module, the safety standard tester is respectively connected with the battery pack and the control module, the equipotential tester is respectively connected with the battery pack and the control module, and the collision simulation unit is respectively connected with the battery pack and the control module; the control offline test module executes offline full-project test comprising: And carrying out battery pack total voltage, polarity and short circuit tests through a universal meter unit, carrying out single battery voltage tests, single battery temperature tests, differential pressure tests and temperature difference tests through a battery management system, carrying out insulation voltage withstand tests through a safety rule tester, carrying out equipotential tests through an equipotential tester, carrying out internal resistance tests through the battery tester, carrying out collision tests through a collision simulation unit and carrying out precharge tests through a capacitor unit, wherein the tests are carried out sequentially.
10. The battery pack offline test method according to claim 7, wherein the battery pack includes a battery management system, and wherein the control offline test module further comprises, before performing the offline full-project test: Waking up a battery management system; Acquiring the current output by the battery management system; and after the battery management system is determined to be awakened according to the current output by the battery management system, executing the step of controlling the offline test module to execute the offline full-project test.

Description

Battery pack offline testing system and method Technical Field The invention relates to the technical field of automobile power batteries, in particular to a battery pack offline testing system and method. Background The power battery pack is used as a core power component of the new energy automobile, and before leaving the factory, an airtight Test (for detecting sealing reliability) and an EOL Test (End-of-Line Test, EOL Test for short) are required to be completed, and the detection is a key link for guaranteeing the product quality. In the prior art, the airtight test and the EOL test of the battery pack are usually separated into independent work stations, so that the test efficiency is low. Disclosure of Invention The invention provides a battery pack offline test system and method, which are used for solving the problem of low efficiency when an airtight test and an EOL test are carried out on a battery pack. According to an aspect of the present invention, there is provided a battery pack offline testing system, including: a control module; the airtight testing module is respectively connected with the battery pack and the control module and is configured to detect the air tightness of the battery pack; The automatic plug-in module is connected with the control module and is configured to respectively dock the battery pack at the test station with the high-voltage test plug, the low-voltage communication test plug and the airtight test module; the off-line test module is respectively connected with the high-voltage test plug and the low-voltage communication test plug and the control module and is configured to execute off-line full-project test; The control module is configured to perform an off-line full item test by the off-line test module and perform an air tightness detection of the battery pack by the air tightness test module at the same time of performing the off-line full item test. Optionally, the automatic plug module includes: A mobile unit; The quick-insertion placing rack is arranged on one side of the testing station and is configured to place the high-voltage testing plug and the low-voltage communication testing plug; One end of the quick-change module is detachably connected with the mechanical arm of the mobile unit, and the other end of the quick-change module is detachably connected with the high-voltage test plug or the low-voltage communication test plug under the control of the control module in a time-sharing manner; The image acquisition unit is fixed at one end of the mechanical arm, connected with the mobile unit, of the quick-change module, is connected with the control module, and is configured to acquire first image information when the battery pack is in butt joint with the high-voltage test plug, acquire second image information when the battery pack is in butt joint with the low-voltage communication test plug, and acquire third image information when the battery pack is in butt joint with the airtight test module; The control module is configured to control the mobile unit to move to dock the battery pack with the high-voltage test plug according to the first image information, control the mobile unit to move to dock the battery pack with the low-voltage communication test plug according to the second image information, and control the mobile unit to move to dock the battery pack with the airtight test module according to the third image information. Optionally, the automatic plug module still include with insert rack one-to-one's balance hanging the module soon, install in the correspondence insert on the crossbeam of rack soon, the balance hangs the module and includes a plurality of balance hanging, the cantilever end that the balance hung is used for wearing to establish and the bearing with the pencil that high voltage test plug is connected or the pencil that low voltage communication test plug is connected. Optionally, the off-line test module comprises a universal meter unit, a capacitance unit, a battery tester, a safety gauge tester, an equipotential tester and a collision simulation unit; The universal meter unit is respectively connected with the battery pack and the control module and is configured to collect the total voltage of the battery pack; The capacitor unit is connected between the positive electrode end and the negative electrode end of the battery pack and is also connected with the control module, and the control module is used for acquiring the voltages at two ends of the capacitor unit when the battery pack is precharged; The battery tester is respectively connected with the battery pack and the control module and is configured to detect the internal resistance of the battery pack; the safety gauge tester is respectively connected with the battery pack and the control module and is configured to detect insulation resistance between the positive end of the battery pack and the shell of the battery pack and insulation resistance between t