Aging detector and aging test method

Abstract

The present invention discloses an aging detector and an aging test method, the aging detector includes an aging box, an aging test power supply for providing a test current to a battery in the aging box, and an aging detection unit for controlling the entire aging process, the aging test power supply and the aging detection unit are installed in the aging box, and the power supply end of the aging test power supply is electrically connected to the power transmission end of the aging box, and the signal transmission port of the aging detection unit is signal-connected to the signal transmission port of the aging box; the method includes the following steps: installing the fixture on a fixture plate and electrically connecting it to each port of the fixture plate; installing the fixture plate on a fixture plate support assembly and electrically connecting it to a charge and discharge processor; measuring the fixture life, contact resistance, elastic force, and temperature rise at different temperatures; discharging the material, and completing the test. The beneficial effects of the present invention are: the fixture can be subjected to an aging test, the operation is simple, the replacement is convenient, and different types of fixtures can be replaced.

Description

Technical Field

[0001] The present invention relates to an aging detector and an aging test method, belonging to the technical field of lithium battery testing Background Art

[0002] Lithium-ion batteries have many advantages such as high energy, small size, light weight, high specific energy, good safety and flexible design. They are widely used in new energy vehicles, energy storage facilities and other products.

[0003] In the production process of lithium-ion batteries, charging and discharging of lithium-ion batteries is one of the most critical processes. The reliability and safety of the clamp in the charging and discharging process of lithium-ion batteries is crucial.

[0004] With the development of lithium battery industry, lithium battery manufacturers have higher and higher requirements on battery performance in order to win a higher market share. Higher requirements are put forward for the life and contact resistance of the fixture, so it is necessary to perform probe aging test, but the current aging device usually performs aging test on the battery, lacks aging test on the fixture. Summary of the invention

[0005] In order to solve the problem of lack of aging test for fixtures, the present invention proposes an aging detector and an aging test method which are simple to test, convenient to replace and can perform aging test on fixtures.

[0006] An aging detector described in the present invention is characterized by comprising an aging box for performing an aging test on a lithium battery charging and discharging fixture, an aging test power supply for providing a test current to the battery in the aging box, and an aging detection unit for controlling the entire aging process, wherein the aging test power supply and the aging detection unit are installed in the aging box, and the power supply end of the aging test power supply is electrically connected to the power transmission end of the aging box, and the signal transmission port of the aging detection unit is signal-connected to the signal transmission port of the aging box;

[0007] The aging box includes a box body and a charging and discharging unit arranged in the box body, the charging and discharging unit includes a lifting and adjusting mechanism, a fixture contact unit and a battery contact unit, the lifting and adjusting mechanism includes a bottom plate, a lifting plate, a guide column, a lifting cylinder and a first guide rail, the bottom plate is horizontally paved in the aging box, and the lower part of the guide column is fixedly connected to the bottom plate; the lifting plate is slidably installed on the upper part of the guide column, and a hollow hole for installing the fixture contact unit is provided in the middle of the lifting plate, and a first guide rail for installing the pole ear assembly is paved on each of the opposite sides of the lifting plate; the lifting cylinder is vertically suspended at the bottom of the lifting plate, and the telescopic end of the lifting cylinder is fixedly connected to the bottom plate, so that the lifting plate is vertically lifted and lowered along the guide column under the drive of the lifting cylinder;

[0008] The fixture contact unit includes a test platform, a fixture contact piece for contacting with the fixture, a pole ear assembly for connecting with the aging detection unit signal, and a first horizontal driving cylinder for driving the test platform to move horizontally, and the two opposite ends of the test platform are each equipped with a pole ear assembly, and the bottom of the pole ear assembly is slidably connected to the first guide rail on the same side of the lifting plate; the first horizontal driving cylinder is installed on the lifting plate, wherein the telescopic end of the first horizontal driving cylinder is connected to the rear of the test platform, so that the test platform can slide along the first guide rail assembly driven by the first horizontal driving cylinder; a plurality of sets of fixture contacts for contacting with the fixture of the battery contact unit are arranged on the surface of the test platform, and the power transmission end of the fixture contact is electrically connected to the power supply end of the aging test power supply, the signal transmission port of the fixture contact is electrically connected to the first signal transmission end of the pole ear assembly, and the second signal transmission end of the pole ear assembly is signal-connected to the signal transmission port of the aging detection unit;

[0009] The battery contact unit includes a fixture plate, a fixture arranged on the fixture plate, a second horizontal driving cylinder for driving the fixture plate to move horizontally forward and backward, a fixture plate support assembly and a second guide rail assembly for supporting the fixture plate, the fixture plate is laid in the test area between the base plate and the lifting plate through the fixture plate support assembly, and the fixture plate is slidably connected to the fixture plate support assembly through the second guide rail assembly; a plurality of sets of fixtures that can be contacted and connected with the fixture contact pieces one by one are arranged on the surface of the fixture plate facing the fixture contact unit, and the connection ports of the fixtures are contacted and connected with the connection ports of the mounting holes of the fixture plate, so that the fixtures are electrically connected with the power supply end of the aging test power supply and the signal connection end of the aging detection unit through the corresponding connection ports on the fixture plate; the second horizontal driving cylinder is installed on the base plate, and the telescopic end of the second horizontal driving cylinder is connected to the fixture plate, and is used to drive the fixture plate to move horizontally along the axial direction of the second guide rail assembly to adjust the position of the fixture;

[0010] The aging test power supply is arranged in the aging box, and the power supply end of the test power supply is electrically connected to the power transmission end of the fixture contact unit;

[0011] The aging detection unit includes a charge and discharge processor and a signal acquisition unit, wherein the charge and discharge controller is arranged in the aging box, and the control end of the charge and discharge processor is electrically connected to the control port of the fixture contact unit; the signal acquisition unit is arranged in the test area of ​​the aging box, and the signal output end of the signal acquisition unit is electrically connected to the signal input end of the charge and discharge processor respectively.

[0012] The fixture plate is provided with mounting holes for mounting the fixture, and each mounting hole is provided with a connection port for electrically connecting to a charge and discharge test device, a test power supply and a test control device; the fixture is mounted on the end surface of the fixture plate facing the detection unit, and the connection port of the fixture is in contact and connected with the connection port of the mounting hole, so that the fixture is electrically connected to the power supply end of the test power supply, the control end of the charge and discharge processor and the test control device through the corresponding connection ports on the fixture plate.

[0013] The signal acquisition unit includes a pressure sensor, a temperature sensor and a voltmeter. The pressure sensor is arranged between the test platform and the lower base plate. The signal output end of the pressure sensor is electrically connected to the signal input end of the charge and discharge processor, and is used to collect the pressure exerted on the test platform to reflect the elastic force information of the fixture; the temperature sensor is arranged on the fixture plate or the test platform, and the signal output end of the temperature sensor is electrically connected to the signal input end of the charge and discharge processor, and is used to collect the temperature information in the volume space; the voltmeter is arranged in the installation area of ​​the rack, and the connection end of the voltmeter is electrically connected to the corresponding connection end on the fixture plate, and is used to measure the contact resistance of the fixture.

[0014] A temperature controller is also provided in the aging box, and a control end of the temperature controller is electrically connected to a control end of the charge and discharge processor for adjusting the temperature of the test area.

[0015] The test power supply is a constant current power supply.

[0016] The second guide rail assembly is axially parallel to the first guide rail assembly, and the second guide rail assembly has the same structure as the first guide rail assembly, including a horizontally laid guide rail and a slider that can move horizontally along the axial direction of the guide rail, wherein the guide rail is laid on a lifting plate or a fixture plate support assembly, the bottom of the slider slides with the guide rail, and the upper part of the slider is fixedly connected to the test platform or the fixture plate, so that the test platform or the fixture plate can slide along the corresponding guide rail driven by the corresponding slider.

[0017] The aging test method using the aging detector of the present invention comprises the following steps:

[0018] 1) Install the fixture on the fixture plate:

[0019] Select a matching fixture board according to the fixture model, and electrically connect the test end, power transmission end, and control end of the fixture to the corresponding voltmeter, test power supply, and charge-discharge processor through the corresponding connection ports on the fixture board;

[0020] 2) Install the fixture plate onto the fixture plate support assembly:

[0021] The fixture plate is installed into the test fixture mechanism, and the connection ports connected to the test end, the power transmission end and the control end of the fixture are electrically connected to the corresponding voltmeter, the test power supply and the charge-discharge processor respectively, so as to realize the electrical connection between the fixture and the voltmeter, the test power supply and the charge-discharge processor;

[0022] 3) Measure the fixture life, contact resistance, elastic force and temperature rise at different temperatures:

[0023] The driving cylinder contracts, causing the battery tab plate to drop, and the fixture is in contact with the battery tab. The fixture is inspected according to the aging process on the charge and discharge processor. The fixture life, contact resistance, elastic force, and temperature rise are tested at room temperature and high temperature respectively, and the test results are transmitted to the charge and discharge processor.

[0024] 4) Discharging:

[0025] After the test is completed, the lifting plate rises driven by the lifting cylinder, the fixture is disengaged from the battery tab, the fixture is taken out, and the test is completed.

[0026] The beneficial effects of the present invention are: the aging test can be carried out on the clamp, the operation is simple, the replacement is convenient, and different types of clamps can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1a It is a structural diagram of the present invention.

[0028] Figure 1b It is a front view of the present invention.

[0029] Figure 1c It is a side view of the present invention.

[0030] Figure 1d It is a top view of the present invention.

[0031] Figure 2a It is a structural diagram of the charge and discharge unit of the present invention.

[0032] Figure 2b It is a front view of the charge and discharge unit of the present invention.

[0033] Figure 2c It is a side view of the charge and discharge unit of the present invention.

[0034] Figure 2d It is a top view of the charge and discharge unit of the present invention.

[0035] Figure 3a It is a structural diagram of the clamp contact unit of the present invention.

[0036] Figure 3b It is a front view of the clamp contact unit of the present invention.

[0037] Figure 3c 1 is a side view of the clamp contact unit of the present invention.

[0038] Figure 3d 1 is a top view of the clamp contact unit of the present invention.

[0039] Figure 4a It is a structural diagram of a battery contact unit of the present invention.

[0040] Figure 4b It is a front view of the battery contact unit of the present invention.

[0041] Figure 4c 1 is a side view of a battery contact unit according to the present invention.

[0042] Figure 4d 1 is a top view of a battery contact unit according to the present invention. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings.

[0044] Refer to the attached figure:

[0045] Embodiment 1 An aging detector described in the present invention comprises an aging box 1 for performing an aging test on a lithium battery charging and discharging fixture, an aging test power supply for providing a test current to the battery in the aging box, and an aging detection unit for controlling the entire aging process, wherein the aging test power supply and the aging detection unit are installed in the aging box, and the power supply end of the aging test power supply is electrically connected to the power transmission end of the aging box, and the signal transmission port of the aging detection unit is signal-connected to the signal transmission port of the aging box;

[0046] The aging box 1 includes a box body 11 and a charge and discharge unit 12 disposed in the box body, the charge and discharge unit 12 includes a lifting adjustment mechanism 121, a fixture contact unit 122 and a battery contact unit 123, the lifting adjustment mechanism 121 includes a bottom plate 1211, a lifting plate 1212, a guide column 1213, a lifting cylinder 1214 and a first guide rail assembly 1215, the bottom plate 1211 is horizontally paved in the box body 11 of the aging box 1, and the lower part of the guide column 1213 is fixedly connected to the bottom plate 1211; The lifting plate 1212 is slidably mounted on the upper part of the guide column 1213, a hollow hole for mounting the fixture contact unit 13 is provided in the middle of the lifting plate 1212, and a first guide rail assembly 1215 for mounting the tab assembly is paved on the two opposite sides of the lifting plate 1212; the lifting cylinder 1214 is vertically suspended at the bottom of the lifting plate 1212, and the telescopic end of the lifting cylinder 1214 is fixedly connected to the bottom plate 1211, so that the lifting plate 1212 is vertically lifted and lowered along the guide column 1213 under the drive of the lifting cylinder 1214;

[0047] The fixture contact unit 122 includes a test platform 1221, a fixture contact piece 1222 for contacting the fixture, a pole ear assembly 1223 for connecting to the aging detection unit signal, and a first horizontal driving cylinder 1224 for driving the test platform to move horizontally. The two opposite ends of the test platform 1221 are each equipped with a pole ear assembly 1223, and the bottom of the pole ear assembly 1223 is slidably connected to the first guide rail assembly 1215 on the same side of the lifting plate 1212; the first horizontal driving cylinder 1224 is installed on the lifting plate 1212, wherein the telescopic end of the first horizontal driving cylinder 1224 is Connected to the rear of the test platform 1221, so that the test platform 1221 can slide along the first guide rail assembly 1215 driven by the first horizontal driving cylinder 1224; a plurality of sets of fixture contact pieces 1222 for contacting with the fixture of the battery contact unit are arranged on the surface of the test platform 1221, and the power transmission end of the fixture contact piece 1222 is electrically connected to the power supply end of the aging test power supply, the signal transmission port of the fixture contact piece 1222 is electrically connected to the first signal transmission end of the pole ear assembly 1223, and the second signal transmission end of the pole ear assembly 1223 is signal-connected to the signal transmission port of the aging detection unit;

[0048] The battery contact unit 123 includes a fixture plate 1231, a fixture 1232 arranged on the fixture plate, a second horizontal driving cylinder 1233 for driving the fixture plate to move horizontally forward and backward, a fixture plate support assembly 1234 for supporting the fixture plate, and a second guide rail assembly 1235. The fixture plate 1231 is laid on the test area between the bottom plate 1211 and the lifting plate 1212 through the fixture plate support assembly 1234, and the fixture plate 1231 is slidably connected to the fixture plate support assembly 1234 through the second guide rail assembly 1235; the surface of the fixture plate 1231 facing the fixture contact unit 122 is provided with a plurality of sets of fixtures that can be connected with the fixture plate The fixture 1232 is connected to the fixture contact pieces one by one, and the connection port of the fixture 1232 is in contact with the connection port of the mounting hole of the fixture plate 1231, so that the fixture 1232 is electrically connected to the power supply end of the aging test power supply and the signal connection end of the aging detection unit through the corresponding connection port on the fixture plate 1231; the second horizontal driving cylinder 1233 is installed on the base plate 1211, and the telescopic end of the second horizontal driving cylinder 1233 is connected to the fixture plate 1231, which is used to drive the fixture plate 1231 to move horizontally along the axial direction of the second guide rail assembly 1235 to adjust the position of the fixture 1232;

[0049] The aging test power supply is arranged in the aging box, and the power supply end of the test power supply is electrically connected to the power transmission end of the fixture contact unit 122;

[0050] The aging detection unit includes a charge and discharge processor and a signal acquisition unit, wherein the charge and discharge controller is arranged in the aging box, and the control end of the charge and discharge processor is electrically connected to the control port of the fixture contact unit; the signal acquisition unit is arranged in the test area of ​​the aging box, and the signal output end of the signal acquisition unit is electrically connected to the signal input end of the charge and discharge processor respectively.

[0051] The fixture plate 1231 is provided with mounting holes for installing the fixture, and each mounting hole is provided with a connection port for electrically connecting to a charge and discharge test device, a test power supply and a test control device; the fixture is installed on the end surface of the fixture plate facing the detection unit, and the connection port of the fixture is in contact and connected with the connection port of the mounting hole, so that the fixture is electrically connected to the power supply end of the test power supply, the control end of the charge and discharge processor and the test control device through the corresponding connection ports on the fixture plate.

[0052] The signal acquisition unit includes a pressure sensor, a temperature sensor and a voltmeter. The pressure sensor is arranged between the test platform and the lower base plate. The signal output end of the pressure sensor is electrically connected to the signal input end of the charge and discharge processor, and is used to collect the pressure exerted on the test platform to reflect the elastic force information of the fixture; the temperature sensor is arranged on the fixture plate or the test platform, and the signal output end of the temperature sensor is electrically connected to the signal input end of the charge and discharge processor, and is used to collect the temperature information in the volume space; the voltmeter is arranged in the installation area of ​​the rack, and the connection end of the voltmeter is electrically connected to the corresponding connection end on the fixture plate, and is used to measure the contact resistance of the fixture.

[0053] A temperature controller is also provided in the aging box, and a control end of the temperature controller is electrically connected to a control end of the charge and discharge processor for adjusting the temperature of the test area.

[0054] The test power supply is a constant current power supply.

[0055] The second guide rail assembly 1235 is axially parallel to the first guide rail assembly 1215, and the second guide rail assembly 1235 has the same structure as the first guide rail assembly 1215, including a horizontally laid guide rail and a slider that can move horizontally along the axial direction of the guide rail, wherein the guide rail is laid on a lifting plate or a fixture plate support assembly, the bottom of the slider slides with the guide rail, and the upper part of the slider is fixedly connected to the test platform or the fixture plate, so that the test platform or the fixture plate can slide along the corresponding guide rail driven by the corresponding slider.

[0056] Embodiment 2 An aging test method using an aging detector described in Embodiment 1 comprises the following steps:

[0057] 1) Install the fixture on the fixture plate:

[0058] Select a matching fixture board according to the fixture model, and electrically connect the test end, power transmission end, and control end of the fixture to the corresponding voltmeter, test power supply, and charge-discharge processor through the corresponding connection ports on the fixture board;

[0059] 2) Install the fixture plate onto the fixture plate support assembly:

[0060] The fixture plate is installed into the test fixture mechanism, and the connection ports connected to the test end, the power transmission end and the control end of the fixture are electrically connected to the corresponding voltmeter, the test power supply and the charge-discharge processor respectively, so as to realize the electrical connection between the fixture and the voltmeter, the test power supply and the charge-discharge processor;

[0061] 3) Measure the fixture life, contact resistance, elastic force and temperature rise at different temperatures:

[0062] The driving cylinder contracts, causing the battery tab plate to drop, and the fixture is in contact with the battery tab. The fixture is inspected according to the aging process on the charge and discharge processor. The fixture life, contact resistance, elastic force, and temperature rise are tested at room temperature and high temperature respectively, and the test results are transmitted to the charge and discharge processor.

[0063] 4) Discharging:

[0064] After the test is completed, the lifting plate rises driven by the lifting cylinder, the fixture is disengaged from the battery tab, the fixture is taken out, and the test is completed.

[0065] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. An aging detector, characterized in that: It includes an aging box for performing an aging test on a lithium battery charging and discharging fixture, an aging test power supply for providing a test current to the battery in the aging box, and an aging detection unit for controlling the entire aging process, wherein the aging test power supply and the aging detection unit are installed in the aging box, and the power supply end of the aging test power supply is electrically connected to the power transmission end of the aging box, and the signal transmission port of the aging detection unit is signal-connected to the signal transmission port of the aging box; The aging box includes a box body and a charging and discharging unit arranged in the box body, the charging and discharging unit includes a lifting and adjusting mechanism, a fixture contact unit and a battery contact unit, the lifting and adjusting mechanism includes a bottom plate, a lifting plate, a guide column, a lifting cylinder and a first guide rail, the bottom plate is horizontally paved in the box body of the aging box, and the lower part of the guide column is fixedly connected to the bottom plate; the lifting plate is slidably installed on the upper part of the guide column, and a hollow hole for installing the fixture contact unit is provided in the middle of the lifting plate, and a first guide rail for installing the pole ear assembly is paved on each of the opposite sides of the lifting plate; the lifting cylinder is vertically suspended at the bottom of the lifting plate, and the telescopic end of the lifting cylinder is fixedly connected to the bottom plate, so that the lifting plate is vertically lifted and lowered along the guide column under the drive of the lifting cylinder; The fixture contact unit includes a test platform, a fixture contact piece for contacting the fixture, a tab assembly for connecting with the aging detection unit signal, and a first horizontal driving cylinder for driving the test platform to move horizontally, and the two opposite ends of the test platform are each equipped with a tab assembly, and the bottom of the tab assembly is slidably connected to the first guide rail on the same side of the lifting plate; the first horizontal driving cylinder is installed on the lifting plate, wherein the telescopic end of the first horizontal driving cylinder is connected to the rear of the test platform, so that the test platform can slide along the first guide rail assembly under the drive of the first horizontal driving cylinder; The surface of the test platform is provided with a plurality of fixture contact pieces for contacting with the fixture of the battery contact unit, and the power transmission end of the fixture contact piece is electrically connected to the power supply end of the aging test power supply, the signal transmission port of the fixture contact piece is electrically connected to the first signal transmission end of the tab assembly, and the second signal transmission end of the tab assembly is signal-connected to the signal transmission port of the aging detection unit; The battery contact unit includes a fixture plate, a fixture arranged on the fixture plate, a second horizontal driving cylinder for driving the fixture plate to move horizontally forward and backward, a fixture plate support assembly and a second guide rail assembly for supporting the fixture plate, the fixture plate is laid in the test area between the base plate and the lifting plate through the fixture plate support assembly, and the fixture plate is slidably connected to the fixture plate support assembly through the second guide rail assembly; a plurality of sets of fixtures that can be contacted and connected with the fixture contact pieces one by one are arranged on the surface of the fixture plate facing the fixture contact unit, and the connection ports of the fixtures are contacted and connected with the connection ports of the mounting holes of the fixture plate, so that the fixtures are electrically connected with the power supply end of the aging test power supply and the signal connection end of the aging detection unit through the corresponding connection ports on the fixture plate; the second horizontal driving cylinder is installed on the base plate, and the telescopic end of the second horizontal driving cylinder is connected to the fixture plate, and is used to drive the fixture plate to move horizontally along the axial direction of the second guide rail assembly to adjust the position of the fixture; The aging test power supply is arranged in the aging box, and the power supply end of the test power supply is electrically connected to the power transmission end of the fixture contact unit; The aging detection unit includes a charge and discharge processor and a signal acquisition unit, wherein the charge and discharge controller is arranged in the aging box, and the control end of the charge and discharge processor is electrically connected to the control port of the fixture contact unit; the signal acquisition unit is arranged in the test area of ​​the aging box, and the signal output end of the signal acquisition unit is electrically connected to the signal input end of the charge and discharge processor respectively; The signal acquisition unit includes a pressure sensor, a temperature sensor and a voltmeter. The pressure sensor is arranged between the test platform and the lower base plate, and the signal output end of the pressure sensor is electrically connected to the signal input end of the charge and discharge processor, so as to collect the pressure on the test platform to reflect the elastic force information of the fixture; the temperature sensor is arranged on the fixture plate or the test platform, and the signal output end of the temperature sensor is electrically connected to the signal input end of the charge and discharge processor, so as to collect the temperature information in the volume space; the voltmeter is arranged in the installation area of ​​the rack, and the connection end of the voltmeter is electrically connected to the corresponding connection end on the fixture plate, so as to measure the contact resistance of the fixture; The second guide rail assembly is axially parallel to the first guide rail assembly, and the second guide rail assembly has the same structure as the first guide rail assembly, including a horizontally laid guide rail and a slider that can move horizontally along the axial direction of the guide rail, wherein the guide rail is laid on a lifting plate or a fixture plate support assembly, the bottom of the slider slides with the guide rail, and the upper part of the slider is fixedly connected to the test platform or the fixture plate, so that the test platform or the fixture plate can slide along the corresponding guide rail driven by the corresponding slider.

2. An aging detector as claimed in claim 1, characterized in that: The fixture plate is provided with mounting holes for mounting the fixture, and each mounting hole is provided with a connection port for electrically connecting to a charge and discharge test device, a test power supply and a test control device; the fixture is mounted on the end surface of the fixture plate facing the detection unit, and the connection port of the fixture is in contact and connected with the connection port of the mounting hole, so that the fixture is electrically connected to the power supply end of the test power supply, the control end of the charge and discharge processor and the test control device through the corresponding connection ports on the fixture plate.

3. An aging detector as claimed in claim 1, characterized in that: A temperature controller is also provided in the aging box, and a control end of the temperature controller is electrically connected to a control end of the charge and discharge processor for adjusting the temperature of the test area.

4. An aging detector as claimed in claim 3, characterized in that: The test power supply is a constant current power supply.

5. An aging test method using an aging detector according to any one of claims 1 to 4, comprising the following steps: 1) Install the fixture on the fixture plate: Select a matching fixture board according to the fixture model, and electrically connect the test end, power transmission end, and control end of the fixture to the corresponding voltmeter, test power supply, and charge-discharge processor through the corresponding connection ports on the fixture board; 2) Install the fixture plate onto the fixture plate support assembly: The fixture plate is installed into the test fixture mechanism, and the connection ports connected to the test end, the power transmission end and the control end of the fixture are electrically connected to the corresponding voltmeter, the test power supply and the charge-discharge processor respectively, so as to realize the electrical connection between the fixture and the voltmeter, the test power supply and the charge-discharge processor; 3) Measure the fixture life, contact resistance, elastic force, and temperature rise at different temperatures: The driving cylinder contracts, causing the battery tab plate to drop, and the fixture is in contact with the battery tab. The fixture is inspected according to the aging process on the charge and discharge processor. The fixture life, contact resistance, elastic force, and temperature rise are tested at room temperature and high temperature respectively, and the test results are transmitted to the charge and discharge processor. 4) Discharging: After the test is completed, the lifting plate rises driven by the lifting cylinder, the fixture is disengaged from the battery tab, the fixture is taken out, and the test is completed.

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