Battery test fixture

Abstract

The utility model discloses a battery test fixture, its structure comprises a first clamping plate, a second clamping plate, a spacing member, a locking member and a display terminal, the spacing member is arranged close to the locking member, and the locking member is at least located at the two opposite sides of a battery, when the locking member applies force to the first clamping plate and the second clamping plate for pressurization, the display terminal can display the display terminal. One end face of the limiting piece abuts against the inner side face of the first clamping plate, and the other end face of the limiting piece abuts against the inner side face of the second clamping plate, so that the pressure sensors located on the two side faces of the battery can sense pressure values in real time, and the pressure values are displayed on the display terminal in real time; and further, the locking force of each locking piece of the clamp can be quickly adjusted in real time, so that the initial stress states of the two stress surfaces of the battery are kept consistent.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery testing device technical field especially relates to a battery test fixture. BACKGROUND

[0002] At present, in square battery test, usually uses the steel clamp to hold the fixed battery, that is, adopts two steel plates, places the battery between two steel plates, then locks two steel plates with bolt, and then fixes and limit the battery. SUMMARY

[0003] In order to overcome at least one of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a battery test fixture, which can quickly adjust the locking force of each locking member of the fixture in real time, and ensure that the initial stress state of the battery stress surface remains consistent.

[0004] The technical scheme adopted by the utility model to solve the problem is:

[0005] A battery test fixture, comprising a first clamp plate and a second clamp plate, the first clamp plate and the second clamp plate hold a battery therebetween, the first clamp plate and the second clamp plate clamp the battery through a locking member, and the locking member is located at least on the opposite sides of the battery.

[0006] The battery test fixture further comprises a limiting member, the limiting member is located between the first clamp plate and the second clamp plate, and the limiting member is arranged close to the locking member, one end surface of the limiting member abuts against the inner side surface of the first clamp plate, and the other end surface of the limiting member abuts against the inner side surface of the second clamp plate.

[0007] At least one end surface of the limiting member is provided with a pressure sensor, or the limiting member is a pressure sensor, and a pressure sensing element of the pressure sensor is installed on at least one end surface of the limiting member.

[0008] The battery test fixture further comprises a display terminal, which is used to display the pressure value sensed by the pressure sensor, and each pressure sensor is electrically connected to the display terminal.

[0009] When the locking member applies pressure to the first and second clamping plates, the limiting member abuts against the inner side of the first clamping plate at one end and against the inner side of the second clamping plate at the other end. Furthermore, the limiting member is positioned close to the locking member, allowing the pressure sensor on the limiting member to detect the pressure value in real time and display it on the display terminal. This enables real-time and rapid adjustment of the locking force of each locking member in the clamp, ensuring that the initial force on the battery's surface remains consistent.

[0010] Furthermore, pressure sensors are installed on both ends of the limiting member.

[0011] This technical solution installs pressure sensors on both ends of the limiting component, which can monitor the pressure on the two force-bearing surfaces of the clamped battery in real time. This allows for more precise adjustment of the locking force of each locking component of the clamp, resulting in a higher consistency in the initial force state of the battery's force-bearing surfaces.

[0012] Furthermore, the pressure sensing element of the pressure sensor is mounted on both ends of the limiting member.

[0013] This technical solution can also monitor the pressure on the two force-bearing surfaces of the clamped battery in real time, thereby more accurately adjusting the locking force of each locking component of the clamp, and thus making the initial force state of the battery force-bearing surface more consistent.

[0014] Furthermore, limiting components are provided on both opposite sides of the battery, and the limiting components include multiple limiting members, each of which is located between the locking member and the side of the battery.

[0015] This technical solution uses multiple limiting components to test the pressure values ​​at multiple points on the fixture, further ensuring that the initial stress state of the battery's force-bearing surface remains consistent.

[0016] Furthermore, in each of the limiting components, a plurality of the limiting members are spaced apart along the long side of the battery.

[0017] This technical solution, by uniformly or non-uniformly spacing multiple limiting components along the long side of the battery, can detect whether the pressure on the force-bearing surface of the battery is consistent along the long side of the battery, thereby adjusting the corresponding locking components, and thus more accurately ensuring that the force on the force-bearing surface of the battery is consistent at the initial force state.

[0018] Furthermore, each of the limiting components includes a connecting rod, and in each limiting component, a plurality of the limiting members are detachably mounted on the corresponding connecting rod.

[0019] This technical solution uses a connecting rod to easily fix multiple limiting components together for synchronous pressure detection. Moreover, each limiting component is detachably connected to the connecting rod, and different sizes of limiting components can be replaced according to the size of the clamped battery. The number of limiting components on the connecting rod can also be reduced or increased as needed.

[0020] Furthermore, in each of the limiting components, a plurality of limiting members are evenly spaced along the length direction of the corresponding connecting rod.

[0021] The multiple limiting components of this technical solution are evenly spaced along the length of the corresponding connecting rod, which makes the entire limiting assembly simple in structure, easy to place between the first clamping plate and the second clamping plate, and convenient to detect whether the pressure on the force-bearing surface of the battery is consistent along its long side.

[0022] Furthermore, it includes an electrical signal line. In each of the limiting components, one end of the electrical signal line is connected to the display terminal, and the other end of the electrical signal line passes through the corresponding connecting rod to connect to each of the pressure sensors.

[0023] This technical solution connects multiple pressure sensors in each limit component to the display terminal via electrical signal lines and connecting rods, simplifying the wiring of the entire fixture and facilitating the limit detection operation of the limit components.

[0024] Furthermore, the display terminal is a display screen, which is installed on the outer side of the first clamping plate and / or the second clamping plate.

[0025] This technical solution mounts the display screen on the outer side of the first or second clamping plate. When the locking mechanism applies force, it is easier to observe the pressure value on the display screen in a timely manner, thereby quickly adjusting the locking force of the corresponding locking mechanism to ensure that the force on the force-bearing surface is consistent when the battery is initially in its initial state.

[0026] Furthermore, locking assemblies are provided on opposite sides of the battery, and each locking assembly includes multiple locking elements, which are evenly spaced along the long side of the battery.

[0027] This technical solution arranges multiple locking components evenly spaced along the long side of the battery, which can uniformly lock and fix multiple points on the first and second clamping plates, that is, it can uniformly clamp the battery and ensure that the force on the force-bearing surface is consistent when the battery is initially in the same state.

[0028] Furthermore, the locking members located on opposite sides of the battery have different directions of force application. The locking member on one side of the battery has a first direction of force application, and the locking member on the other side of the battery has a second direction of force application. The first direction is opposite to the second direction.

[0029] This technical solution designs the locking components on both sides of the battery to apply pressure in opposite directions, so that both force-bearing surfaces of the battery can directly bear the locking pressure when the upper force is tightened, thus ensuring that the two force-bearing surfaces of the battery are subjected to more consistent force.

[0030] Furthermore, in each of the locking assemblies, the directions of force application on two adjacent locking members are the same or opposite.

[0031] In this technical solution, when the upward force application directions of the locking components located on both sides of the battery are designed to be opposite, the upward force application directions of two adjacent locking components in each locking assembly are the same. This ensures that both force-bearing surfaces of the battery can directly bear the locking pressure when the upward force is applied, thus ensuring more consistent force distribution on both force-bearing surfaces of the battery. When the upward force application directions of the locking components located on both sides of the battery are designed to be the same, the upward force application directions of two adjacent locking components in each locking assembly are opposite. This ensures that both force-bearing surfaces on the same side of the battery can alternately and directly bear the locking pressure, thus ensuring more consistent force distribution on both force-bearing surfaces on the same side of the battery.

[0032] Furthermore, the locking element includes a bolt and a nut, the end of which passes through the first clamping plate and the second clamping plate and is screwed into the nut.

[0033] The battery testing fixture provided by this utility model has the following technical advantages:

[0034] By positioning the limiting member close to the locking member, with the locking member located at least on opposite sides of the battery, when the locking member applies pressure to the first and second clamping plates, the pressure sensors on both sides of the battery can sense the pressure value in real time and display it on the display terminal. This allows for real-time and rapid adjustment of the locking force of each locking member in the clamp, ensuring that the initial force state of the two force-bearing surfaces of the battery remains consistent. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the battery testing fixture of this utility model holding a battery.

[0036] Figure 2 This is a schematic diagram of the battery testing fixture of this utility model;

[0037] Figure 3 This is a schematic diagram of the battery testing fixture of this utility model holding a battery from another perspective;

[0038] Figure 4 This is a schematic diagram of the structure of a single limiting component of this utility model.

[0039] The meanings of the reference numerals in the attached figures are as follows:

[0040] First clamping plate 1;

[0041] Second clamping plate 2;

[0042] Battery 3;

[0043] Locking component 4;

[0044] Limiting component 5;

[0045] Display terminal 6;

[0046] Electrical signal line 7;

[0047] Connecting rod 8. Detailed Implementation

[0048] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0051] See Figure 1 and Figure 2 This utility model discloses a battery testing fixture, the structure of which includes a first clamping plate 1 and a second clamping plate 2. A battery 3 is clamped between the first clamping plate 1 and the second clamping plate 2. The battery 3 is the battery to be tested. The first clamping plate 1 and the second clamping plate 2 clamp the battery 3 by a locking member 4. The locking member 4 is located at least on opposite sides of the battery 3.

[0052] In this embodiment, the locking member 4 is located on opposite sides of the battery 3 so that both opposite force-bearing surfaces of the battery 3 can be subjected to the locking force of the locking member 4, and to ensure that the two force-bearing surfaces of the battery 3 are subjected to the same force in the initial state.

[0053] In some embodiments, the locking member 4 may also be located at the four opposite corners of the battery 3, and a symmetrical locking method may be adopted so that both force-bearing surfaces of the battery 3 can be subjected to the locking force of the locking member 4.

[0054] In this embodiment, the two force-bearing surfaces of the battery 3 are the two large left and right surfaces of the square battery 3, the locking member 4 is located next to the two small front and rear surfaces of the square battery 3, and the top and bottom surfaces of the square battery 3 are free surfaces. The positive and negative electrodes are installed on the top surface of the square battery 3.

[0055] The battery testing fixture of this utility model, see [link to utility model]. Figure 1 and Figure 2 As shown, the structure also includes a limiting member 5, which is located between the first clamping plate 1 and the second clamping plate 2, and is positioned close to the locking member 4. One end face of the limiting member 5 abuts against the inner side of the first clamping plate 1, and the other end face of the limiting member 5 abuts against the inner side of the second clamping plate 2. A pressure sensor is mounted on at least one end face of the limiting member 5; or, the limiting member 5 is a pressure sensor, and the pressure sensing element of the pressure sensor is mounted on at least one end face of the limiting member 5.

[0056] In this embodiment, pressure sensors are installed on both ends of the limiting member 5. When the locking member 4 applies pressure to the first clamping plate 1 and the second clamping plate 2, the pressure sensors on both ends of the limiting member 5 can simultaneously detect the force on the two force-bearing surfaces of the battery 3, and thus adjust the locking force of the corresponding locking member 4 in a timely manner to ensure that the initial force state of the two force-bearing surfaces of the battery 3 remains consistent.

[0057] In some embodiments, since the limiting member 5 is a pressure sensor, the pressure sensing element of the pressure sensor is installed on both ends of the limiting member 5, which can also monitor the pressure on the two force-bearing surfaces of the clamped battery 3 in real time, and can more accurately adjust the locking force of each locking member 4 of the clamp, so that the initial force state of the force-bearing surface of the battery 3 is more consistent.

[0058] The battery testing fixture of this utility model, see [link to utility model]. Figure 1 and Figure 2As shown, it also includes a display terminal 6, which is used to display the pressure values ​​sensed by the pressure sensors. Each pressure sensor is electrically connected to the display terminal 6. In this embodiment, the display terminal 6 is a display screen, which is mounted on the outer side of the first clamping plate 1 or the second clamping plate 2. The display screen is electrically connected to all the pressure sensors via electrical signal lines 7. In some embodiments, the display terminal 6 can also be a mobile phone, which is electrically connected to all the pressure sensors via a Bluetooth module.

[0059] This utility model installs the display screen on the outer side of the first clamping plate 1 or the second clamping plate 2. When the locking member 4 is tightened, it is easier to observe the pressure value on the display screen in a timely manner, and then quickly adjust the locking force of the corresponding locking member 4 to ensure that the two force-bearing surfaces of the battery 3 are in the same state in the initial state.

[0060] In some embodiments, the display screens are mounted on the outer surfaces of the first clamping plate 1 and the second clamping plate 2. The display screen on the first clamping plate 1 is electrically connected to a pressure sensor located on one side of the battery 3 via an electrical signal line 7, and the display screen on the second clamping plate 2 is electrically connected to a pressure sensor located on the other side of the battery 3 via an electrical signal line 7. By setting up two display screens, the tests on both sides of the battery 3 are displayed separately, avoiding data confusion and enabling real-time comparison of data on both sides of the battery 3. This allows for quick and accurate adjustment of the corresponding locking element 4 and the corresponding locking force.

[0061] This invention, by placing the limiting member 5 close to the locking member 4, with the locking member 4 located at least on opposite sides of the battery 3, allows the pressure sensors on both sides of the battery 3 to sense the pressure value in real time when the locking member 4 applies pressure to the first clamping plate 1 and the second clamping plate 2. This is because one end of the limiting member 5 abuts against the inner side of the first clamping plate 1, and the other end of the limiting member 5 abuts against the inner side of the second clamping plate 2. The pressure value is then displayed on the display terminal 6 in real time, enabling the locking force of each locking member 4 of the clamp to be adjusted quickly and in real time. This ensures that the initial force state of the two force-bearing surfaces of the battery 3 remains consistent, avoiding the inconsistent force on the two force-bearing surfaces of the battery 3 caused by external factors such as human intervention.

[0062] Furthermore, this invention, by enabling real-time and rapid adjustment of the locking force of each locking component 4 of the fixture, can also verify special stress states for specific needs. For example, during research and verification, to analyze the impact of uneven stress on the battery 3 under different scenarios, it is necessary to verify the battery 3 under different gradient stresses. At this time, the locking force of each locking component 4 of the fixture can be quickly adjusted by displaying the pressure value on the display terminal 6, thereby achieving different gradient stress states on the battery 3 and verifying the impact of uneven stress on its performance or test results. Another example is that during long-term testing, the battery 3 may expand and deform. When it is necessary to remove the test fixture to perform other analyses on the battery 3 that are inconvenient to perform with the fixture on, relevant information can be recorded on the display screen before removing the fixture. When the battery 3 is reinstalled onto the test fixture, the relevant information before removal can be restored to continue testing, avoiding inaccuracies in subsequent tests due to differences in data before and after removal.

[0063] In this embodiment, see Figures 2 to 4 As shown, limiting components are provided on both sides of the battery 3. The limiting components include multiple limiting parts 5, and each limiting component is located between the locking part 4 and the side of the battery 3.

[0064] This invention, by providing multiple limiting members 5 on both opposite sides of the battery 3, allows for testing of pressure values ​​at multiple points on the clamp, i.e., testing of pressure values ​​at multiple points on the force-bearing surface of the battery 3, further ensuring that the initial force state of the two force-bearing surfaces of the battery 3 remains consistent. Furthermore, by placing the limiting members 5 between the locking member 4 and the side of the battery 3, the limiting members 5 are closer to the force-bearing surface of the battery 3, thus the pressure values ​​detected by the limiting members 5 are closer to the actual pressure values ​​experienced by the force-bearing surface of the battery 3.

[0065] In this embodiment, see Figure 1 and Figure 2 As shown, in each limiting assembly, multiple limiting members 5 are evenly spaced along the long side of the battery 3, that is, multiple limiting members 5 are evenly spaced along the vertical direction of the battery 3.

[0066] This utility model, by evenly spacing multiple limiting members 5 along the long side of the battery 3, can detect whether the pressure on the force-bearing surface of the battery 3 is consistent from top to bottom along the long side of the battery 3. Thus, the corresponding locking member 4 can be flexibly adjusted, thereby more accurately ensuring that the force on the force-bearing surface of the battery 3 is consistent at its initial force state.

[0067] In this embodiment, see Figure 1 , Figure 2 and Figure 4As shown, each limiting assembly includes a connecting rod 8, and in each limiting assembly, multiple limiting elements 5 are detachably mounted on the corresponding connecting rod 8.

[0068] This utility model uses a connecting rod 8 to conveniently fix multiple limiting members 5 together to synchronously detect the pressure values ​​at different points on the same side of the battery 3. Moreover, each limiting member 5 is detachably connected to the connecting rod 8. Different sizes of limiting members 5 can be replaced according to the different sizes of the clamped battery 3. The number of limiting members 5 can also be reduced or increased on the connecting rod 8 as needed.

[0069] In this embodiment, see Figure 2 and Figure 4 As shown, in each limiting assembly, multiple limiting members 5 are evenly spaced along the length direction of the corresponding connecting rod 8.

[0070] The multiple limiting members 5 of this utility model are evenly spaced along the length direction of the corresponding connecting rod 8, which makes the structure of the entire limiting assembly simple, easy to place between the first clamping plate 1 and the second clamping plate 2, and convenient to detect whether the pressure on the force-bearing surface of the battery 3 along its long side is consistent. When it is inconsistent, the corresponding locking member 4 can be adjusted in time to make the pressure on the force-bearing surface of the battery 3 consistent from top to bottom.

[0071] In this embodiment, see Figure 1 and Figure 2 As shown, the test fixture also includes an electrical signal line 7. In each limit assembly, one end of the electrical signal line 7 is connected to the display terminal 6, and the other end of the electrical signal line 7 is threaded through the corresponding connecting rod 8 to connect to each pressure sensor.

[0072] This invention connects multiple pressure sensors in each limit component to the display terminal 6 via an electrical signal line 7 and a connecting rod 8, simplifying the wiring of the entire fixture and facilitating the limit detection operation of the limit components.

[0073] In some embodiments, the electrical signal line 7 can be replaced with a wireless communication module, such as Wi-Fi or Bluetooth, and the display terminal 6 connects to all pressure sensors via the wireless communication module.

[0074] In this embodiment, see Figure 2 and Figure 3As shown, locking assemblies are provided on both opposite sides of the battery 3. Each locking assembly includes multiple locking elements 4. In each locking assembly, the multiple locking elements 4 are spaced apart along the long side of the battery 3, and can be evenly or unevenly spaced. In this embodiment, there are six locking elements 4 in each locking assembly. The spacing between two adjacent locking elements 4 located at the top and bottom is smaller, while the spacing between two adjacent locking elements 4 located in the middle is larger. By arranging more detection points at the top and bottom of the battery, the consistency of the stress state of the force-bearing surface of the battery 3 from top to bottom in the initial state can be further improved.

[0075] This utility model arranges multiple locking parts 4 evenly spaced along the long side of the battery 3, which can evenly lock and fix multiple points of the first clamping plate 1 and the second clamping plate 2, that is, it can evenly clamp the battery 3 from top to bottom, ensuring that the force state of each point on the force-bearing surface of the battery 3 is consistent from top to bottom in the initial state.

[0076] In this embodiment, see Figure 2 and Figure 3 As shown, the locking members 4 are located on opposite sides of the battery 3. The direction of the force applied to the locking member 4 on one side of the battery 3 is the first direction, and the direction of the force applied to the locking member 4 on the other side of the battery 3 is the second direction. The first direction and the second direction are opposite.

[0077] This invention designs the locking members 4 located on both sides of the battery 3 to have opposite directions of force application, so that both force-bearing surfaces of the battery 3 can directly bear the locking force pressure when the force is locked, thus ensuring that the two force-bearing surfaces of the battery 3 are subjected to more consistent force.

[0078] In some embodiments, in each locking assembly, the upward force of two adjacent locking members 4 is in the same or opposite direction.

[0079] When the upward force application direction of the locking parts 4 located on both sides of the battery 3 is designed to be opposite, in each locking assembly, the upward force application direction of two adjacent locking parts 4 is the same, so that the two force-bearing surfaces of the battery 3 can directly bear the locking pressure when the upward force is locked, ensuring that the two force-bearing surfaces of the battery 3 are subjected to more consistent forces.

[0080] When the upward force application direction of the locking members 4 located on both sides of the battery 3 is designed to be the same, in each locking assembly, the upward force application direction of two adjacent locking members 4 is opposite, so that the two force-bearing surfaces on the same side of the battery 3 can alternately and directly bear the locking pressure, ensuring that the force on the two force-bearing surfaces on the same side of the battery 3 is more consistent.

[0081] In this embodiment, the locking component 4 includes a bolt and a nut. The end of the bolt passes through the first clamping plate 1 and the second clamping plate 2 and is tightened with the nut. The first clamping plate 1 and the second clamping plate 2 are provided with locking holes. The locking hole where the head of the bolt is located is a countersunk hole to avoid too many components protruding from the outer surface of the first clamping plate 1 and the second clamping plate 2.

[0082] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A battery testing fixture, characterized in that: It includes a first clamping plate and a second clamping plate, with a battery clamped between the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate clamping the battery by a locking member, the locking member being located at least on opposite sides of the battery; Includes a limiting member, which is located between the first clamping plate and the second clamping plate, and is disposed close to the locking member. One end face of the limiting member abuts against the inner side of the first clamping plate, and the other end face of the limiting member abuts against the inner side of the second clamping plate. A pressure sensor is mounted on at least one end face of the limiting member; or, the limiting member is a pressure sensor, and the pressure sensing element of the pressure sensor is mounted on at least one end face of the limiting member. It includes a display terminal for displaying the pressure values ​​sensed by the pressure sensors, and each of the pressure sensors is electrically connected to the display terminal.

2. The battery testing fixture according to claim 1, characterized in that: Pressure sensors are installed on both ends of the limiting component.

3. The battery testing fixture according to claim 1, characterized in that: The pressure sensing element of the pressure sensor is mounted on both ends of the limiting member.

4. The battery testing fixture according to any one of claims 1-3, characterized in that: Limiting components are provided on both sides of the battery. Each limiting component includes multiple limiting members, and each limiting component is located between the locking member and the side of the battery.

5. The battery testing fixture according to claim 4, characterized in that: In each of the limiting components, a plurality of limiting members are evenly spaced along the long side of the battery.

6. The battery testing fixture according to claim 4, characterized in that: Each of the limiting components includes a connecting rod, and in each limiting component, a plurality of the limiting elements are detachably mounted on the corresponding connecting rod.

7. The battery testing fixture according to claim 6, characterized in that: In each of the limiting components, a plurality of limiting members are spaced apart along the length direction of the corresponding connecting rod.

8. The battery testing fixture according to claim 6, characterized in that: The device includes an electrical signal line. In each of the limiting components, one end of the electrical signal line is connected to the display terminal, and the other end of the electrical signal line is threaded through the corresponding connecting rod to connect to each of the pressure sensors.

9. The battery testing fixture according to claim 1, characterized in that: The display terminal is a display screen, which is installed on the outer side of the first clamping plate and / or the second clamping plate.

10. The battery testing fixture according to claim 1, characterized in that: Locking assemblies are provided on opposite sides of the battery, and each locking assembly includes multiple locking elements, which are evenly spaced along the long side of the battery.

11. The battery testing fixture according to claim 1 or 10, characterized in that: The locking members are located on opposite sides of the battery, wherein the locking member on one side of the battery applies a first direction of locking pressure, and the locking member on the other side of the battery applies a second direction of force application, wherein the first direction is opposite to the second direction.

12. The battery testing fixture according to claim 10, characterized in that: In each of the locking assemblies, the directions of the force applied to two adjacent locking members are the same or opposite.

13. The battery testing fixture according to claim 1, characterized in that: The locking component includes a bolt and a nut, with the end of the bolt passing through the first clamp and the second clamp and then tightened with the nut.

Images