Battery cell performance test tool and test device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell performance test tool and a test device.The battery cell performance test tool comprises a first clamping plate, a second clamping plate, a conductive part, an extrusion assembly and a reset spring, and the first clamping plate and the second clamping plate are oppositely arranged; the conductive part is arranged on the first clamping plate and / or the second clamping plate; the extrusion assembly is connected with the first clamping plate and / or the second clamping plate and is used for enabling the first clamping plate and the second clamping plate to be close to each other so as to enable the conductive part to be connected with a tab of a to-be-tested cell; the reset spring is arranged between the first clamping plate and the second clamping plate, one end of the reset spring is connected with the first clamping plate, the other end is connected with the second clamping plate, and the reset spring is used for separating the first clamping plate from the second clamping plate to separate the conductive part from the tab of the to-be-tested cell. According to the application, the tab of the to-be-tested cell can be automatically connected with the conductive part, so that the connection part of the conductive part and the tab of the to-be-tested cell keeps relatively small and constant resistance, balanced temperature rise is kept, and the accuracy of test data is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell performance testing tool and testing device. Background Art

[0002] Currently, two connection methods are commonly used when testing the electrical performance of soft-pack batteries. The first method is to clamp the tabs with clips at the end of the equipment's current and voltage lines; the second method is to connect the equipment's current and voltage lines to the tabs with bolts and nuts.

[0003] However, after long-term use, the clamping force of the clip decreases, the connection resistance increases, the temperature rises, and the test data is inaccurate. At the same time, the temperature sensing wire pasted on the tab is very easy to fall off, and the temperature data cannot be collected. Method 2 takes a lot of time when connecting the battery cell. Frequent disconnection will have a great impact on or even damage the tab. The temperature sensing wire pasted on the tab is very easy to fall off, and the temperature data cannot be collected. Utility Model Content

[0004] The present application provides a battery cell performance testing tool and a testing device to solve the problem in the prior art that during electrical performance testing, the connection between the battery cell tab and the test end becomes loose, resulting in large test data errors.

[0005] In one aspect, the present application provides a battery cell performance testing tool, comprising:

[0006] a first splint and a second splint, the first splint and the second splint being arranged opposite to each other;

[0007] The conductive part is provided on the first clamping plate and / or the second clamping plate;

[0008] An extrusion assembly, connected to the first clamping plate and / or the second clamping plate, used to bring the first clamping plate and the second clamping plate closer to each other so that the conductive portion is connected to the tab of the battery cell to be tested;

[0009] A reset spring is arranged between the first clamping plate and the second clamping plate. One end of the reset spring is connected to the first clamping plate, and the other end is connected to the second clamping plate. The reset spring is used to move the first clamping plate and the second clamping plate away from each other to separate the conductive part from the tab of the battery cell to be tested.

[0010] In one possible design, the first and second splints are each provided with a perforation, and the extrusion assembly includes:

[0011] a drawstring, the free ends of which are passed sequentially through the perforations;

[0012] The first driver is connected to the free end of the pull rope, and moves the first clamping plate and the second clamping plate closer to or farther away from each other by retracting / releasing the pull rope.

[0013] In a possible design, the conductive portion includes a conductive sheet, which is provided on a side of the first clamping plate close to the second clamping plate and / or a side of the second clamping plate close to the first clamping plate.

[0014] In a possible design, protrusions are evenly arranged on the conductive sheet, and the protrusions are used to abut against the tabs of the battery cell to be tested.

[0015] In a possible design, a wiring channel is further provided on the first clamping plate and / or the second clamping plate.

[0016] In one possible design, it also includes:

[0017] The base has a limiting portion, and the limiting portion is used to place the battery cell to be tested;

[0018] The driving assembly is arranged on the base and is connected to the first clamping plate and the second clamping plate respectively. The driving assembly can drive the first clamping plate and the second clamping plate to approach or move away from the battery cell to be tested.

[0019] In one possible design, the drive assembly includes:

[0020] A support arm, one end of the support arm is rotatably connected to the base, and a position of the support arm near the other end is used for mounting the first clamping plate and the second clamping plate;

[0021] A transmission arm, wherein a first guide portion is provided on the transmission arm, and a second guide portion is provided on the support arm, and the second guide portion is slidably connected to the first guide portion;

[0022] The second driver is connected to one end of the transmission arm. The second driver drives the transmission arm to swing around the first axis to generate relative displacement between the second guide part and the first guide part along the length direction of the transmission arm, thereby driving the first clamping plate and the second clamping plate to swing around the second axis to approach / move away from the battery cell to be tested.

[0023] In a possible design, a guide groove is provided on the support arm, and the first clamping plate and the second clamping plate respectively have a guide edge, and the guide edge is slidably provided in the guide groove.

[0024] In a possible design, a visual camera is further included. The visual camera is set on the base and is used to capture images of the battery cell to be tested.

[0025] On the other hand, the present application also provides a battery cell performance testing device, including the battery cell performance testing tooling as described above.

[0026] The beneficial effects of this application are as follows:

[0027] The battery cell performance testing tool of the present application sets a reset spring between the first clamping plate and the second clamping plate, and utilizes the compression elastic force of the reset spring to separate the first clamping plate and the second clamping plate from each other in the absence of external force, which is conducive to the smooth entry of the pole ear of the battery cell to be tested into the gap between the first clamping plate and the second clamping plate; by setting an extrusion assembly, the extrusion assembly is connected to the first clamping plate and / or the second clamping plate, so that the extrusion assembly can drive the first clamping plate and the second clamping plate to approach each other, so that the first clamping plate and the second clamping plate abut each other. With the assistance of the extrusion assembly, the conductive part and the pole ear of the battery cell to be tested can always maintain effective and stable pressure contact, avoiding poor contact between the conductive part and the pole ear of the battery cell to be tested, which is conducive to maintaining a small and constant resistance at the connection and a balanced temperature rise, thereby ensuring the accuracy of the test data.

[0028] The battery cell performance testing device provided in the present application includes the battery cell performance testing tool in the present application, and therefore also includes all the above-mentioned advantages of the battery cell performance testing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A schematic diagram of the overall structure of the battery cell performance testing tool provided in an embodiment of the present application;

[0031] Figure 2 A schematic structural diagram of the first pressing plate and the second pressing plate of the battery cell performance testing tool provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structure of the drive assembly of the battery cell performance testing tool provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 100, first clamping plate; 200, second clamping plate; 110, perforation; 120, wiring channel; 130, guide edge; 300, conductive part; 310, conductive sheet; 400, extrusion assembly; 410, pull rope; 420, first driver; 500, return spring; 600, base; 700, drive assembly; 710, support arm; 711, second guide part; 712, pin; 720, transmission arm; 721, first guide part; 730, second driver; 800, visual camera; 900, battery cell to be tested. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] The following combination Figure 1-Figure 3 , describing the battery cell performance testing tooling provided in the embodiments of the present application.

[0037] Reference Figure 2As shown, an embodiment of the present application provides a battery cell performance testing tool, including a first clamping plate 100, a second clamping plate 200, a conductive part 300, an extrusion assembly 400 and a reset spring 500, the first clamping plate 100 and the second clamping plate 200 are arranged opposite to each other; the conductive part 300 is arranged on the first clamping plate 100 and / or the second clamping plate 200; the extrusion assembly 400 is connected to the first clamping plate 100 and / or the second clamping plate 200, and is used to make the first clamping plate 100 and the second clamping plate 200 close to each other so that the conductive part 300 is connected to the pole ear of the battery cell to be tested 900; the reset spring 500 is arranged between the first clamping plate 100 and the second clamping plate 200, one end of the reset spring 500 is connected to the first clamping plate 100, and the other end is connected to the second clamping plate 200, and is used to make the first clamping plate 100 and the second clamping plate 200 move away from each other so that the conductive part 300 is separated from the pole ear of the battery cell to be tested. In some specific embodiments, the conductive part 300 is arranged on a side of the first splint 100 close to the second splint 200 or on a side of the second splint 200 close to the first splint 100. By bringing the first splint 100 and the second splint 200 close to each other, the conductive part 300 can be abutted against one side of the tab of the battery cell to be tested, thereby achieving electrical connection between the conductive part 300 and the tab of the battery cell to be tested; in some specific embodiments, the conductive part 300 is respectively provided on the first splint 100 and the second splint 200. By bringing the first splint 100 and the second splint 200 close to each other, the conductive part 300 can be abutted against both sides of the tab of the battery cell to be tested, thereby achieving electrical connection between the conductive part 300 and the tab of the battery cell to be tested. In some specific embodiments, the extrusion assembly 400 includes an extrusion plate, which is driven by a cylinder, a hydraulic cylinder or a motor and can move in a direction perpendicular to the first clamping plate 100; when the extrusion plate pushes the first clamping plate 100 and / or the second clamping plate 200 so that the first clamping plate 100 and the second clamping plate 200 are close to each other, the conductive part 300 can be brought into contact with the pole ear of the battery cell to be tested to achieve electrical connection, and the electrical performance of the battery cell to be tested can be tested at this time; when the extrusion plate moves in the opposite direction, under the elastic force of the reset spring 500, the reset spring 500 pushes the first clamping plate 100 and the second clamping plate 200 away from each other, so that the conductive part 300 and the pole ear of the battery cell to be tested are separated from each other and the electrical connection is disconnected, and the pole ear of the battery cell to be tested can be inserted or removed between the first clamping plate 100 and the second clamping plate 200.

[0038] By utilizing the technical solution of the above embodiment, a return spring 500 is provided between the first clamping plate 100 and the second clamping plate 200, and the compressive elastic force of the return spring 500 is utilized to separate the first clamping plate 100 and the second clamping plate 200 from each other in the absence of external force, which is conducive to allowing the pole ear of the battery cell to be tested to smoothly enter the gap between the first clamping plate 100 and the second clamping plate 200; by providing an extrusion assembly 400, the extrusion assembly 400 is connected to the first clamping plate 100 and / or the second clamping plate 200, so that the extrusion assembly 400 can drive the first clamping plate 100 and the second clamping plate 200 to approach each other, so that the first clamping plate 100 and the second clamping plate 200 abut against each other. With the assistance of the extrusion assembly 400, the conductive part 300 and the pole ear of the battery cell to be tested can always maintain effective and stable pressure contact, avoiding poor contact between the conductive part 300 and the pole ear of the battery cell to be tested, which is conducive to maintaining a small and constant resistance at the connection and a balanced temperature rise, thereby ensuring the accuracy of the test data.

[0039] Reference Figure 2As shown, in some embodiments provided in the present application, a through-hole 110 is respectively provided on the first splint 100 and the second splint 200, and the extrusion assembly 400 includes a pull rope 410 and a first driver 420, and the free end of the pull rope 410 passes through the through-hole 110 in sequence; the first driver 420 is connected to the free end of the pull rope 410, and the first splint 100 and the second splint 200 are moved closer to / away from each other by retracting / releasing the pull rope 410. In some specific embodiments, the first driver 420 is a motor, one end of the pull rope 410 is fixed to one of the through holes 110 on the first splint 100, and the free end of the pull rope 410 passes through the through holes 110 on the first splint 100 and the second splint 200 in turn. The free end of the pull rope 410 is connected to the output shaft of the motor. The output shaft of the motor rotates clockwise to drive the part of the pull rope 410 close to the free end to be wound around the output shaft of the motor, and the length of the remaining pull rope 410 is reduced. The pull rope 410 will pull the first splint 100 close to the second splint 200, and the number of rotations of the motor output shaft is pre-set. The length of the remaining pull rope 410 can maintain a certain pressure between the first clamping plate 100 and the second clamping plate 200. In this way, during the test process, since the length of the remaining pull rope 410 is constant, the pressure between the first clamping plate 100 and the second clamping plate 200 is constant, and the pressure between the conductive portion 300 and the tab of the battery cell to be tested is also constant. This can ensure that the conductive portion 300 and the tab of the battery cell to be tested can always maintain effective and stable pressure contact, avoiding poor contact between the conductive portion 300 and the tab of the battery cell to be tested, which is conducive to maintaining a small and constant resistance at the connection and a balanced temperature rise, thereby ensuring the accuracy of the test data. When the test is completed, the output shaft of the motor rotates counterclockwise, thereby lowering the pull rope 410 wrapped around the output shaft. In this way, the length of the remaining pull rope 410 increases. At this time, under the action of the reset spring 500, the first clamping plate 100 and the second clamping plate 200 move away from each other, and the conductive portion 300 and the tab of the battery cell to be tested are separated from each other.

[0040] Reference Figure 2As shown, in some embodiments provided herein, the conductive portion 300 includes a conductive sheet 310, which is disposed on a side of the first clamping plate 100 close to the second clamping plate 200 and / or a side of the second clamping plate 200 close to the first clamping plate 100. Specifically, the conductive sheet 310 is a copper sheet, which is used to make electrical contact with the tab; in some specific embodiments, mounting grooves are provided at opposite positions on the first clamping plate 100 and the second clamping plate 200, and the conductive sheets 310 are respectively disposed in the mounting grooves. The thickness of the conductive sheet 310 is greater than or equal to the thickness of the mounting groove. When the first clamping plate 100 and the second clamping plate 200 are closed, the two conductive sheets 310 jointly squeeze the tab of the battery cell to be tested in the middle. In some specific embodiments, two mounting grooves are respectively provided on the first splint 100 and the second splint 200, and correspondingly, a conductive sheet 310 is respectively installed in each mounting groove to achieve connection with the positive electrode tab and the negative electrode tab; in some specific embodiments, the conductive sheet 310 is also connected to a signal transmission line, for example, a temperature signal transmission line, a voltage signal transmission line, and a current signal transmission line, etc.; specifically, the signal transmission line can be connected to the conductive sheet 310 by bonding or welding, so that by directly connecting the signal transmission line to the conductive sheet 310, the operation can be simplified and the probability of the signal transmission line falling off and causing the signal to be unable to be transmitted during the detection process can be reduced; in some specific embodiments, a wiring channel 120 is also correspondingly opened on the first splint 100 and the second splint 200, and the wiring channel 120 can be a wiring groove or a wiring hole, so that the signal transmission line can be led out from the wiring channel 120. In some specific embodiments, protrusions are evenly arranged on the conductive sheet 310, and the protrusions are used to abut against the pole ears of the battery cell to be tested. Specifically, the protrusions are conical protrusions. By making dense point contacts between the protrusions and the pole ears of the battery cell to be tested, the internal resistance of the connection can be effectively reduced, thereby ensuring the reliability of the connection.

[0041] Reference Figure 1As shown, in some embodiments provided in the present application, the battery cell performance testing tool also includes a base 600 and a drive assembly 700. The base 600 has a limiting portion, and the limiting portion is used to place the battery cell to be tested; the drive assembly 700 is arranged on the base 600 and is respectively connected to the first clamping plate 100 and the second clamping plate 200. The drive assembly 700 can drive the first clamping plate 100 and the second clamping plate 200 to approach / move away from the battery cell to be tested. In some specific embodiments, a plurality of drive assemblies 700 are provided on the base 600, each drive assembly 700 being connected to a set of first and second clamping plates 100, 200, respectively, for driving the corresponding first and second clamping plates 100, 200 toward or away from the corresponding battery cell to be tested; specifically, the drive assemblies 700 are provided on the left and right walls of the base 600, and the inner bottom of the base 600 is provided with a plurality of rectangular slots, each of which is used to place a battery cell to be tested, with the tabs of the battery cell to be tested facing upward; in some embodiments, the drive assembly 700 drives the first and second clamping plates 100, 200 to move up and down so that the tabs of the battery cell to be tested enter or are removed from between the first and second clamping plates 100, 200. In this way, the drive assembly 700 can automatically cause the tabs of the battery cell to be tested to enter or be removed from between the first and second clamping plates 100, 200, or to be removed from between the first and second clamping plates 100, 200.

[0042] Reference Figure 1 、 Figure 3As shown, in some embodiments provided in the present application, the driving assembly 700 includes a support arm 710, a transmission arm 720 and a second driver 730, one end of the support arm 710 is rotatably connected to the base 600 through a pin shaft 712, and the position of the support arm 710 near the other end is used to install the first clamping plate 100 and the second clamping plate 200; a first guide portion 721 is provided on the transmission arm 720, and a second guide portion 711 is provided on the support arm 710, and the second guide portion 711 is slidingly connected to the first guide portion 721; the second driver 730 is fixedly connected to one end of the transmission arm 720, and the second driver 730 drives the transmission arm 720 to swing around the first axis to generate a relative displacement between the second guide portion 711 and the first guide portion 721 along the length direction of the transmission arm 720, thereby driving the first clamping plate 100 and the second clamping plate 200 to swing around the second axis to approach / move away from the battery cell to be tested. In some specific embodiments, the first guide portion 721 is a guide hole, which is a bar-shaped hole, and the length direction of the guide hole is consistent with the length direction of the transmission arm 720. The second guide portion 711 is a guide column, and the outer wall of the guide column is slidably connected to the inner wall of the guide hole, and the guide column can slide along the inner wall of the guide hole along its length direction; specifically, the second driver 730 is a motor, and one end of the transmission arm 720 is vertically fixedly connected to the output shaft of the motor. For example, the transmission arm 720 is bolted to the output shaft of the motor, and the transmission arm 720 is driven to rotate around the output shaft of the motor by the rotation of the output shaft of the motor. In this way, the rotation angle of the motor is pre-set. When the motor rotates counterclockwise, the transmission arm 720 rotates counterclockwise downward, driving the guide column to slide in the guide hole along its length, and then driving the support arm 710 to rotate counterclockwise downward around the pin 712 until the support arm 710 rotates to a horizontal position, and the motor stops rotating. At this time, the tab of the battery cell to be tested just enters the position between the first clamping plate 100 and the second clamping plate 200; conversely, when the motor rotates clockwise, the transmission arm 720 rotates clockwise upward, driving the guide column to slide in the guide hole along its length, and then driving the support arm 710 to rotate clockwise upward around the pin 712. After the support arm 710 is reset, the motor stops rotating. In this way, when the support arm 710 is reset, the first clamping plate 100 and the second clamping plate 200 respectively avoid the limiting parts on the base 600, making it convenient to place the battery cell to be tested at the limiting parts; when the support arm 710 is horizontal, the tabs of the battery cell to be tested at the limiting parts can be automatically clamped between the first clamping plate 100 and the second clamping plate 200, thereby realizing automatic clamping and automatic removal of the tabs of the battery cell to be tested, improving detection efficiency and reducing manual operation steps.In some specific embodiments, the first driver 420 is arranged on the base 600, and a rope hole is provided on the support arm 710. The free end of the pull rope 410 is passed through the rope hole in the support arm 710 and connected to the first driver 420. When the support arm 710 is horizontal and the tab of the battery cell to be tested is inserted between the first splint 100 and the second splint 200, the first driver 420 pulls the pull rope 410, and the pull rope 410 then pulls the first splint 100 and the second splint 200, so that the first splint 100 and the second splint 200 are close to each other, so that the conductive part 300 and the tab of the battery cell to be tested are kept in a pressed contact state.

[0043] Reference Figure 3 As shown, in some specific embodiments, a guide groove (not shown) is provided on the support arm 710, and the first clamping plate 100 and the second clamping plate 200 each have a guide edge 130, which is slidably disposed in the guide groove. In this way, by inserting the guide edges 130 of the first clamping plate 100 and the second clamping plate 200 into the guide groove, the first clamping plate 100 and the second clamping plate 200 can be movably mounted on the support arm 710. Under the action of the return spring 500 or the pull rope 410, the guide edge 130 can slide in the guide groove, causing the first clamping plate 100 and the second clamping plate 200 to move away from or closer to each other.

[0044] Reference Figure 1 As shown, in some embodiments provided herein, the battery cell performance test fixture further includes a visual camera 800, which is mounted on the base 600 via a rotating base and is used to capture images of the battery cell under test from multiple angles. The visual camera 800 monitors the battery cell under test in real time, enabling the status of the battery cell under test to be monitored and, in a timely manner, detect abnormal conditions such as an abnormal increase in battery cell temperature or the presence of unknown liquids.

[0045] The workflow of the battery cell performance test fixture in this application is as follows:

[0046] Place the battery cell 900 to be tested on the base 600;

[0047] The second driver 730 drives the transmission arm 720 to rotate counterclockwise, driving the guide post to slide along its length in the guide hole, and then drives the support arm 710 to rotate counterclockwise downward around the pin 712 until the support arm 710 rotates to a horizontal position. At this time, the tab of the battery cell to be tested is just in the position between the first clamping plate 100 and the second clamping plate 200.

[0048] The first driver 420 pulls the pull rope 410, which in turn pulls the first clamping plate 100 and the second clamping plate 200, so that the first clamping plate 100 and the second clamping plate 200 are close to each other, thereby keeping the conductive part 300 in a press-contact state with the tab of the battery cell to be tested;

[0049] Performing charge and discharge tests on the battery cell 900 to detect the electrical performance of the battery cell;

[0050] After the test is completed, the first driver 420 rotates in the opposite direction to loosen the pull rope 410. Under the action of the return spring 500, the first clamping plate 100 and the second clamping plate 200 move away from each other, thereby separating the conductive part 300 from the tab of the battery cell to be tested.

[0051] The second driver 730 drives the transmission arm 720 to rotate clockwise, drives the guide column to slide along its length in the guide hole, and then drives the support arm 710 to rotate clockwise around the pin 712, and the support arm 710 is reset.

[0052] An embodiment of the present application also provides a battery cell performance testing device, including the battery cell performance testing tooling in the above embodiment.

[0053] It should be noted that the battery cell performance test device includes the battery cell performance test tooling, which also includes all the advantages of the battery cell performance test tooling mentioned above, which will not be repeated here.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery performance test tool, characterized in that: include: a first clamping plate and a second clamping plate, wherein the first clamping plate and the second clamping plate are arranged opposite to each other; a conductive portion, provided on the first clamping plate and / or the second clamping plate; an extrusion assembly connected to the first clamping plate and / or the second clamping plate, and configured to bring the first clamping plate and the second clamping plate closer to each other so that the conductive portion is connected to the tab of the battery cell to be tested; A return spring is arranged between the first clamping plate and the second clamping plate, one end of the return spring is connected to the first clamping plate, and the other end is connected to the second clamping plate, and is used to move the first clamping plate and the second clamping plate away from each other so as to separate the conductive part from the tab of the battery cell to be tested.

2. The battery performance testing tool according to claim 1, characterized in that: The first clamping plate and the second clamping plate are respectively provided with perforations, and the extrusion assembly includes: a drawstring, the free ends of which pass through the through-holes in sequence; The first driver is connected to the free end of the pull rope, and moves the first clamping plate and the second clamping plate closer to or farther away from each other by retracting / releasing the pull rope.

3. The battery cell performance testing tool according to claim 1, characterized in that: The conductive portion includes a conductive sheet, and the conductive sheet is arranged on a side of the first clamping plate close to the second clamping plate and / or a side of the second clamping plate close to the first clamping plate.

4. The battery cell performance testing tool according to claim 3, characterized in that: The conductive sheet is evenly provided with protrusions, and the protrusions are used to abut against the tabs of the battery cell to be tested.

5. The battery cell performance testing tool according to claim 1, characterized in that: The first clamping plate and / or the second clamping plate are further provided with a wiring channel.

6. The battery cell performance testing tool according to any one of claims 1 to 5, characterized in that: Also includes: A base having a limiting portion, wherein the limiting portion is used to place the battery cell to be tested; The driving assembly is disposed on the base and is connected to the first clamping plate and the second clamping plate respectively. The driving assembly can drive the first clamping plate and the second clamping plate to approach or move away from the battery cell to be tested.

7. The battery cell performance testing tool according to claim 6, characterized in that: The drive assembly includes: a support arm, one end of the support arm being rotatably connected to the base, and a position of the support arm near the other end being used for mounting the first clamping plate and the second clamping plate; A transmission arm, wherein the transmission arm is provided with a first guide portion, and the support arm is provided with a second guide portion, and the second guide portion is slidably connected to the first guide portion; The second driver is connected to one end of the transmission arm. The second driver drives the transmission arm to swing around the first axis to generate relative displacement between the second guide part and the first guide part along the length direction of the transmission arm, thereby driving the first clamping plate and the second clamping plate to swing around the second axis to approach / move away from the battery cell to be tested.

8. The battery cell performance testing tool according to claim 7, characterized in that: The support arm is provided with a guide groove, and the first clamping plate and the second clamping plate respectively have a guide edge, and the guide edge is slidably provided in the guide groove.

9. The battery cell performance testing tool according to claim 6, characterized in that: It also includes a visual camera, which is arranged on the base and is used to capture images of the battery cell to be tested.

10. A battery performance testing device, characterized in that: The invention comprises the battery cell performance testing tool as described in any one of claims 1 to 9.

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