Square battery testing device

Abstract

The utility model provides a square battery testing device. The square battery testing device comprises a portal frame body, a connecting block arranged on the portal frame body in a sliding mode and a testing assembly arranged on the connecting block in a sliding mode. The test assembly comprises a lower shell, a cover plate, two sliding frames, a plurality of mounting blocks for mounting probes, a first distance adjusting assembly and a second distance adjusting assembly; the first distance adjusting assembly comprises a first sliding table, first connecting rods hinged between the first sliding table and the sliding frames, and guide wheels arranged at the two ends of the sliding frames in the length direction. The second distance adjusting assembly comprises a second sliding table, a guide rod arranged on the second sliding table, connecting pieces arranged between the guide rod and the installation blocks close to the guide rod and connecting rod assemblies arranged on the tops of the installation blocks on the same sliding frame, and the guide rod slides on the lower shell. According to the square battery testing device provided by the utility model, spacing adjustment can be carried out according to batteries of different models, the applicability of the device can be improved, and the efficiency of battery capacity prediction can be improved.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, and particularly relates to a square battery testing device. Background Art

[0002] With the popularization of electric vehicles, the market demand for square lithium batteries continues to climb. At the same time, the number of retired square lithium batteries is also increasing. Moreover, if the used square lithium batteries cannot be processed in time, reused or properly recycled, it will cause great pollution to the environment.

[0003] At present, retired square lithium batteries are usually processed by means of cascade utilization to enable the retired square lithium batteries to enter the second life cycle. However, before these square lithium batteries enter the second life cycle, performance evaluation is required to determine whether the batteries have the value of being reused.

[0004] And capacity prediction is the most critical indicator in performance evaluation, which reflects the ability of the battery to store and transfer energy after aging. However, at present, the positive and negative electrodes of the square lithium battery are located at both ends of the top surface. When the battery models are different, the distance between the positive and negative electrodes will change accordingly.

[0005] Moreover, in the current capacity testing device, the test probes are fixed, so a specified device is required to match the corresponding battery models, and it does not have the ability of automation and can only be operated manually. Therefore, it is not conducive to improving the applicability of the device and the efficiency of battery capacity prediction. Summary of the Utility Model

[0006] In view of this, the utility model aims to provide a square battery testing device to improve the applicability of the device and the efficiency of battery capacity prediction.

[0007] To achieve the above object, the technical solution of the utility model is realized as follows:

[0008] A square battery testing device includes a gantry main body, a connection block slidably arranged on the gantry main body along a third preset direction, and a testing component slidably arranged on the connection block along a first preset direction;

[0009] The testing component includes a lower housing, a cover plate arranged on the top of the lower housing, two sliding frames slidably arranged on the bottom of the lower housing along a second preset direction, a plurality of mounting blocks slidably arranged on each sliding frame for mounting probes, and a first distance adjustment component and a second distance adjustment component arranged on the lower housing;

[0010] The first distance adjustment component includes a first sliding table slidably disposed on one side in the length direction of the lower housing, a first connecting rod respectively hinged between the first sliding table and each of the sliding frames, and guide wheels disposed at both ends in the length direction of each of the sliding frames for guiding the sliding of the corresponding sliding frame.

[0011] The second distance adjustment component includes a second sliding table slidably disposed on the other side in the length direction of the lower housing, a guide rod extending along a third preset direction and arranged on the second sliding table, a connecting member respectively disposed between the guide rod and each of the mounting blocks close to the guide rod, and a connecting rod assembly disposed on the tops of each of the mounting blocks on the same sliding frame for driving each of the mounting blocks to slide, and the guide rod slides on the lower housing;

[0012] The first preset direction, the second preset direction and the third preset direction are perpendicular to each other.

[0013] Further, grooves are respectively formed on the side walls in the width direction of the lower housing, and both ends of the guide rod slide in the grooves.

[0014] Further, the connecting rod assembly includes a rotating shaft disposed on each of the mounting blocks, and a plurality of second connecting rods cross-connected on each of the rotating shafts, and the second connecting rods can rotate relative to each other through the rotating shafts.

[0015] Further, slideways corresponding to the first sliding table and / or the second sliding table are respectively arranged on the lower housing, a sliding shaft is arranged on each of the slideways, and the first sliding table and / or the second sliding table is slidably disposed on the corresponding sliding shaft.

[0016] Further, a convex platform protruding upward is disposed on the side wall of each of the sliding frames close to the slideway, one end of each of the first connecting rods is hinged on the corresponding convex platform, and the other end of each of the first connecting rods is hinged on the first sliding table.

[0017] Further, each of the connecting members includes a concave block slidably disposed on the guide rod, and a connecting plate connecting the concave block and the corresponding mounting block close to the guide rod.

[0018] Further, each of the connecting plates is in a "Z" shape and has a first horizontal plate and a second horizontal plate arranged along the length direction of the sliding frame, and a vertical plate connecting the first horizontal plate and the second horizontal plate;

[0019] Each of the first horizontal plates is connected to the corresponding concave block, and each of the second horizontal plates is connected to the corresponding mounting block on the side close to the guide rod.

[0020] Further, a driving part for driving the test component to rotate is provided on the cover plate.

[0021] Further, a mounting plate is provided at the top of the driving part. The driving part is rotatably arranged on the mounting plate, and the mounting plate and the connecting block are connected by a support rod.

[0022] Further, a bushing is provided at one end of the support rod away from the mounting plate. A sliding rod extending in the height direction is provided on the connecting block. The support rod is slidably arranged on the sliding rod through the bushing.

[0023] Compared with the prior art, the present utility model has the following advantages:

[0024] In the square battery testing device of the present utility model, through the sliding frame, multiple mounting blocks, the first distance adjusting component and the second distance adjusting component in the test component, the connection relationship between the first sliding table, the first connecting rod and the sliding frame in the first distance adjusting component can be utilized to realize the distance adjustment in the second preset direction, and the second sliding table, the guiding rod, the connecting piece and the mounting block in the second distance adjusting component can be utilized to realize the distance adjustment in the third preset direction. Thus, batteries of different models can be predicted, which is beneficial to improving the applicability of the device and the efficiency of battery capacity prediction.

[0025] Furthermore, a groove is opened on the lower shell, which is convenient for the guiding rod to slide when adjusting the distance in the second preset direction. The connecting rod assembly is composed of a rotating shaft and multiple second connecting rods, with a simple structure, and the second connecting rods are cross-connected and rotatably arranged on the rotating shaft, which is convenient for the connecting rod assembly to expand and retract. By providing a sliding track and a sliding shaft arranged in the sliding track, the stable sliding of each sliding table can be realized, and the sliding shaft can also play a guiding role.

[0026] Secondly, sliding the concave block on the guiding rod and connecting the connecting plate between the concave block and the mounting block can facilitate the sliding of the sliding frame when adjusting the distance in the second preset direction, and facilitate the sliding of each mounting block when adjusting the distance in the third preset direction. The connecting plate is set as a Z shape and is arranged through the first horizontal plate, the second horizontal plate and the vertical plate, which is convenient for the connection between the concave block and the mounting block, with a simple structure and convenient for design and implementation.

[0027] And, setting a driving part on the cover plate is convenient for the rotation of the test component and improves the applicability of the device. Installing the driving part on the mounting plate and connecting the mounting plate and the connecting block through a support rod is convenient for the connection between the test component and the connecting block. By providing a bushing and a sliding rod, the support rod can slide on the sliding rod, and further, the test component can slide on the gantry main body along the first preset direction. Description of the Drawings

[0028] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0029] Figure 1 is a schematic diagram of the overall structure of the square battery testing device according to an embodiment of the present utility model;

[0030] Figure 2 is a schematic diagram of the structure of the connecting block according to an embodiment of the present utility model;

[0031] Figure 3 is a combined schematic diagram of the connecting member and the testing component according to an embodiment of the present utility model;

[0032] Figure 4 is a composition schematic diagram of the first distance adjustment component and the second distance adjustment component according to an embodiment of the present utility model;

[0033] Figure 5 is a schematic diagram of the structure of the mounting block according to an embodiment of the present utility model;

[0034] Figure 6 is a schematic diagram of the structure of the connecting member according to an embodiment of the present utility model;

[0035] Figure 7 is a connection schematic diagram of the connecting rod assembly and the mounting block according to an embodiment of the present utility model;

[0036] Description of reference numerals:

[0037] 1. Gantry main body; 11. Connecting block; 111. Slide bar; 112. Slide block; 12. Support frame; 13. Cross beam;

[0038] 2. Testing component; 21. Lower housing; 211. Groove; 212. Slideway; 213. Slide shaft; 22. Cover plate; 23. Sliding frame; 231. Boss; 24. Mounting block; 241. Probe;

[0039] 3. First distance adjustment component; 31. First slide table; 32. First connecting rod; 33. Guide wheel;

[0040] 4. Second distance adjustment component; 41. Second slide table; 42. Guide rod; 43. Connecting member; 431. Concave block; 432. Connecting plate; 4321. First cross plate; 4322. Second cross plate; 4323. Longitudinal plate; 44. Connecting rod assembly; 441. Rotating shaft; 442. Second connecting rod; 443. Connecting shaft;

[0041] 51. Driving part; 52. Mounting plate; 53. Support rod; 54. Bush. Detailed implementation manners

[0042] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0043] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0044] Taking the gantry main body where the test device described in the present utility model is located as an example, the orientation terms such as "upper, lower, left, right, front, back" used in the embodiments are based on Figure 1 the up-down direction (also known as the height direction, or the overall Z direction), the left-right direction (also known as the width direction, or the overall body direction), and the front-back direction (also known as the length direction, or the overall X direction) in the state shown for definition.

[0045] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0046] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0047] Embodiment 1

[0048] This embodiment relates to a square battery test device, which can adjust the spacing according to different models of batteries, is beneficial to improving the applicability of the device, and is beneficial to improving the efficiency of battery capacity prediction.

[0049] In terms of the overall structure, as shown in Figures 1 to 7 the square battery test device of this embodiment includes a gantry main body 1, a connection block 11 slidably arranged on the gantry main body 1 along a third preset direction, and a test assembly 2 slidably arranged on the connection block 11 along a first preset direction.

[0050] Among them, the test component 2 includes a lower housing 21, a cover plate 22 provided on the top of the lower housing 21, two sliding frames 23 slidably provided at the bottom of the lower housing 21 along a second preset direction, a plurality of mounting blocks 24 slidably provided on each sliding frame 23 for mounting the probe 241, and a first distance adjustment component 3 and a second distance adjustment component 4 provided on the lower housing 21.

[0051] And the first distance adjustment component 3 includes a first sliding table 31 slidably provided on one side of the lower housing 21 in the length direction, a first connecting rod 32 respectively hinged between the first sliding table 31 and each sliding frame 23, and guide wheels 33 provided at both ends of each sliding frame 23 in the length direction for guiding the sliding of the corresponding sliding frame 23.

[0052] The second distance adjustment component 4 includes a second sliding table 41 slidably provided on the other side of the lower housing 21 in the length direction, a guide rod 42 extending along a third preset direction and arranged on the second sliding table 41, connecting pieces 43 respectively provided between the guide rod 42 and each mounting block 24 close to the guide rod 42, and a connecting rod assembly 44 provided on the top of each mounting block 24 on the same sliding frame 23 for driving each mounting block 24 to slide, and the guide rod 42 slides on the lower housing 21. Here, the first preset direction, the second preset direction and the third preset direction are perpendicular to each other.

[0053] At this time, with the above settings, through the sliding frames 23, the plurality of mounting blocks 24, the first distance adjustment component 3 and the second distance adjustment component 4 in the test component 2, the connection relationship between the first sliding table 31, the first connecting rod 32, the sliding frame 23 and the guide wheels 33 in the first distance adjustment component 3 can be used to realize the spacing adjustment in the second preset direction, and the second sliding table 41, the guide rod 42, the connecting pieces 43 and the mounting block 24 in the second distance adjustment component 4 can be used to realize the spacing adjustment in the third preset direction. Thus, it is possible to predict batteries of different models, which is beneficial to improving the applicability of the device and the efficiency of battery capacity prediction.

[0054] Specifically, it should be noted that the above-mentioned first preset direction is the height direction of the gantry main body 1, the second preset direction is the length direction of the gantry main body 1, that is, the width direction of the following lower housing 21, and the third preset direction is the width direction of the gantry main body 1, that is, the length direction of the following lower housing 21.

[0055] In addition, in this embodiment, based on the connection between the above-mentioned sliding frame 23, each mounting block 24 provided on the sliding frame 23, and each component in the first distance adjustment component 3 and the second distance adjustment component 4, when the first sliding table 31 receives an external drive, the first sliding table 31 slides along the third preset direction, and under the action of the first connecting rod 32, each sliding frame 23 is pushed, and each sliding frame 23 slides relatively along the second preset direction through each guide wheel 33, realizing the spacing adjustment in the second preset direction.

[0056] Furthermore, when the second sliding table 41 receives external driving, the second sliding table 41 drives the guide rod 42 to slide along the third preset direction. Under the action of each connecting member 43, each mounting block 24 connected to the guide rod 42 is pushed to slide along the third preset direction, and each connecting rod assembly 44 is used to drive the remaining mounting blocks 24 to slide, so as to realize the pitch adjustment in the third preset direction.

[0057] Based on the above overall introduction, in this embodiment, as a preferred implementation form, as Figure 4 shown, grooves 211 are formed on the side walls in the width direction of the lower housing 21, and both ends of the guide rod 42 slide in the grooves 211. Here, by forming the grooves 211 on the lower housing 21, it is convenient for the guide rod 42 to slide when adjusting the pitch in the second preset direction.

[0058] During specific implementation, when the second sliding table 41 receives external driving, the second sliding table 41 drives the guide rod 42 to slide along the third preset direction, and both ends of the guide rod 42 are arranged in the grooves 211. Thus, it can play a guiding role when the guide rod 42 slides and ensure the stable sliding of the guide rod 42.

[0059] Moreover, in this embodiment, as a preferred implementation form, as Figure 4 and Figure 7 shown, the connecting rod assembly 44 includes a rotating shaft 441 arranged on each mounting block 24, and a plurality of second connecting rods 442 cross-connected to the rotating shafts 441, and the second connecting rods 442 can rotate relative to each other through the rotating shafts 441. The connecting rod assembly 44 is composed of the rotating shaft 441 and the plurality of second connecting rods 442, with a simple structure. And the second connecting rods 442 are cross-connected and rotatably arranged on the rotating shaft 441, which is convenient for the connecting rod assembly 44 to expand and retract, and thus is beneficial to the pitch adjustment in the third preset direction.

[0060] In the specific structure, continue to refer to Figure 7 shown, one rotating shaft 441 and two second connecting rods 442 are correspondingly arranged on one mounting block 24. During implementation, the two second connecting rods 442 on the previous mounting block 24 are connected to the two second connecting rods 442 on the adjacent mounting block 24 through a connecting shaft 443, and the structure of the connecting shaft 443 is similar to that of the above rotating shaft 441, so details are not described herein again.

[0061] As Figure 4As shown in the figure, in this embodiment, as a preferred implementation form, slideways 212 corresponding to the first sliding platform 31 and the second sliding platform 41 are provided on the lower housing 21. Slide shafts 213 are provided on each of the slideways 212, and the first sliding platform 31 and the second sliding platform 41 are both slidably arranged on the corresponding slide shafts 213. Here, the slideways 212 are respectively provided corresponding to the first sliding platform 31 and the second sliding platform 41, and the slide shafts 213 are arranged in each of the slideways 212 to achieve the stable sliding of the first sliding platform 31 and the second sliding platform 41, and the slide shafts 213 can also play a guiding role.

[0062] In addition, in this embodiment, as a preferred implementation form, continue to refer to Figure 4 As shown in the figure, on the side wall of each sliding frame 23 close to the slideway 212, there is an upwardly protruding boss 231. One end of each first connecting rod 32 is hinged to the corresponding boss 231, and the other end of each first connecting rod 32 is hinged to the first sliding platform 31. Here, the first connecting rod 32 is hinged between the boss 231 and the first sliding platform 31. When the first sliding platform 31 slides, it is convenient to drive each sliding frame 23 to slide relatively along the second preset direction.

[0063] In the specific structure, one end of each first connecting rod 32 is hinged to the boss 231, and the other end is hinged to the first sliding platform 31. The two first connecting rods 32 are symmetrically arranged. When the first sliding platform 31 slides, it can push the sliding frames 23 located on both sides of the slideway 212 to slide relatively through the first connecting rod 32.

[0064] Furthermore, in this embodiment, as a preferred implementation form, refer to Figure 4 and Figure 6 As shown in the figure, each connecting member 43 includes a concave block 431 slidably arranged on the guide rod 42, and a connecting plate 432 connecting the concave block 431 and the corresponding mounting block 24 close to the guide rod 42.

[0065] The advantage of such a setting is that the concave block 431 slides on the guide rod 42, and the connecting plate 432 is connected between the concave block 431 and the mounting block 24, which can facilitate the sliding of the sliding frame 23 when adjusting the distance in the second preset direction, and facilitate the sliding of each mounting block 24 when adjusting the distance in the third preset direction.

[0066] Specifically, in this embodiment, as a preferred implementation form, continue to refer to Figure 6As shown, each connecting plate 432 is in a "Z" shape and has a first cross plate 4321 and a second cross plate 4322 arranged along the length direction of the sliding frame 23, and a longitudinal plate 4323 connected between the first cross plate 4321 and the second cross plate 4322. Moreover, each first cross plate 4321 is connected to the corresponding concave block 431, and each second cross plate 4322 is connected to the corresponding mounting block 24 close to the guide rod 42.

[0067] Therefore, the connecting plate 432 is set to a Z shape, and by setting the first cross plate 4321, the second cross plate 4322 and the longitudinal plate 4323, the connection between the concave block 431 and the mounting block 24 is facilitated, the structure is simple, and it is convenient for design and implementation. Of course, in addition to setting the connecting plate 432 to a Z shape, it can also be set to other common shapes, such as an S shape, etc., as long as it can meet the stable connection between the concave block 431 and the mounting block 24 close to the guide rod 42.

[0068] Considering the rotation requirement of the test assembly 2, in this embodiment, as a preferred implementation form, as Figure 3 shown, a driving part 51 for driving the test assembly 2 to rotate is provided on the cover plate 22. Setting the driving part 51 on the cover plate 22 facilitates the rotation of the test assembly 2 and improves the applicability of the device. In a specific structure, the driving part 51 can adopt a driving product well-known to those skilled in the art, such as a rotary cylinder, etc. Connect the driving part 51 to the cover plate 22, so that the test assembly 2 can be driven to rotate.

[0069] In addition, in this embodiment, as a preferred implementation form, referring to Figure 2 and Figure 3 shown, a mounting plate 52 is provided at the top of the driving part 51. The driving part 51 is rotatably arranged on the mounting plate 52, and the mounting plate 52 and the connecting block 11 are connected by a support rod 53. Here, the driving part 51 is mounted on the mounting plate 52, and the mounting plate 52 and the connecting block 11 are connected together by the support rod 53, which facilitates the connection between the test assembly 2 and the connecting block 11.

[0070] In a specific structure, the driving part 51 is slidably arranged on the mounting plate 52, and the mounting plate 52 is connected to the connecting block 11 through the support rod 53 to realize the sliding of the test assembly 2 relative to the gantry main body 1, which is beneficial to improving the overall automation of the device and further enhancing the applicability of the device.

[0071] Among them, as a preferred implementation form, continue to refer to Figure 3As shown in the figure, a bushing 54 is provided at one end of the support rod 53 of this embodiment away from the mounting plate 52. A sliding rod 111 extending in the height direction is provided on the connecting block 11. The support rod 53 is slidably arranged on the sliding rod 111 through the bushing 54. By providing the bushing 54 and the sliding rod 111, the support rod 53 can slide on the sliding rod 111, and further, the test assembly 2 can slide on the gantry main body 1 along the first preset direction.

[0072] During specific implementation, one end of the support rod 53 is connected to the mounting plate 52, and the other end of the support plate is connected to the bushing 54. At this time, the test assembly 2 is installed on the mounting plate 52 through the driving part 51 to form an integral body, so that the formed integral body slides up and down on the connecting block 11 through the support rod 53 and the bushing 54.

[0073] In addition, in the specific structure, as Figure 3 shown, the number of the support rods 53 can be set to three. Of course, in addition to being set to three, it can also be set to four or five. And, the connecting block 11 of this embodiment includes a slider 112. After connecting the test assembly 2 with the connecting block 11, it can slide on the gantry main body 1 along the third preset direction through the slider 112.

[0074] It is still worth mentioning that for the relevant structural parts not mentioned in the gantry main body 1 of this embodiment, the structures of the gantry products well-known to those skilled in the art can be referred to. For example, the gantry main body 1 includes a support frame 12 and a cross beam 13 slidably arranged on the support frame along the second preset direction, and the above-mentioned slider 112 slides on the cross beam 13.

[0075] In summary, when the square battery testing device of this embodiment is in use, the first sliding table 31 receives an external drive to slide along the third preset direction, and pushes each first connecting rod 32 to expand, thereby driving each sliding frame 23 to slide relative to each other along the second preset direction under the guidance of the guide wheels 33, so as to realize the spacing adjustment in the second preset direction.

[0076] At the same time, when the second sliding table 41 receives an external drive, it drives the guide rod 42 to slide along the third preset direction, and pushes the corresponding mounting block 24 close to the guide rod 42 to slide through the concave block 431 and the connecting plate 432, and under the connection of the link assembly 44, the sliding of the remaining mounting blocks 24 is realized, so as to realize the spacing adjustment in the third preset direction.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A square battery testing device, characterized in that: It comprises a gantry body (1), a connection block (11) arranged on the gantry body (1) for sliding along a third preset direction, and a test assembly (2) arranged on the connection block (11) for sliding along a first preset direction; The test assembly (2) comprises a lower shell (21), a cover plate (22) arranged on the top of the lower shell (21), two sliding frames (23) arranged on the bottom of the lower shell (21) and sliding along a second preset direction, a plurality of mounting blocks (24) slidably arranged on each of the sliding frames (23) for mounting a probe (241), and a first distance adjustment assembly (3) and a second distance adjustment assembly (4) arranged on the lower shell (21); The first distance adjustment component (3) comprises a first slide (31) slidably arranged on one side of the lower housing (21) in the length direction, a first connecting rod (32) respectively hinged between the first slide (31) and each of the sliding frames (23), and a guide wheel (33) arranged at both ends of each of the sliding frames (23) in the length direction for guiding the corresponding sliding frame (23) to slide; The second distance adjustment assembly (4) comprises a second slide table (41) slidably arranged on the other side of the lower shell (21) in the length direction, a guide rod (42) extending along a third preset direction and arranged on the second slide table (41), connecting members (43) respectively arranged between the guide rod (42) and each mounting block (24) close to the guide rod (42), and a connecting rod assembly (44) arranged on the top of each mounting block (24) on the same sliding frame (23) for driving each mounting block (24) to slide, and the guide rod (42) slides on the lower shell (21); The first preset direction, the second preset direction and the third preset direction are arranged perpendicular to each other.

2. The square battery testing device according to claim 1, characterized in that: Grooves (211) are provided on the side walls of the lower shell (21) in the width direction, and the two ends of the guide rod (42) slide in the grooves (211).

3. The square battery testing device according to claim 1, characterized in that: The connecting rod assembly (44) comprises a rotating shaft (441) arranged on each of the mounting blocks (24), and a plurality of second connecting rods (442) cross-connected to each of the rotating shafts (441), and the second connecting rods (442) are able to rotate with each other via the rotating shafts (441).

4. The square battery testing device according to claim 1, characterized in that: The lower shell (21) is provided with slideways (212) respectively arranged corresponding to the first slideway (31) and / or the second slideway (41), each of the slideways (212) is provided with a slide shaft (213), and the first slideway (31) and / or the second slideway (41) are slidably arranged on the corresponding slide shaft (213).

5. The square battery testing device according to claim 4, characterized in that: A boss (231) protruding upward is provided on the side wall of each sliding frame (23) close to the slideway (212), one end of each first connecting rod (32) is hinged on the corresponding boss (231), and the other end of each first connecting rod (32) is hinged on the first sliding platform (31).

6. The square battery testing device according to claim 1, characterized in that: Each of the connecting members (43) comprises a concave block (431) slidably disposed on the guide rod (42), and a connecting plate (432) connected between the concave block (431) and the corresponding mounting block (24) close to the guide rod (42).

7. The square battery testing device according to claim 6, characterized in that: Each of the connecting plates (432) is in a "Z" shape, and comprises a first transverse plate (4321) and a second transverse plate (4322) arranged along the length direction of the sliding frame (23), and a longitudinal plate (4323) connected between the first transverse plate (4321) and the second transverse plate (4322); Each of the first transverse plates (4321) is connected to the corresponding concave block (431), and each of the second transverse plates (4322) is connected to the corresponding mounting block (24) close to the guide rod (42).

8. The square battery testing device according to claim 1, characterized in that: The cover plate (22) is provided with a driving part (51) for driving the test assembly (2) to rotate.

9. The square battery testing device according to claim 8, characterized in that: A mounting plate (52) is provided on the top of the driving part (51), the driving part (51) is rotatably mounted on the mounting plate (52), and the mounting plate (52) and the connecting block (11) are connected via a supporting rod (53).

10. The square battery testing device according to claim 9, characterized in that: A shaft sleeve (54) is provided at one end of the support rod (53) away from the mounting plate (52), and a sliding rod (111) extending in a height direction is provided on the connecting block (11), and the support rod (53) is slidably arranged on the sliding rod (111) through the shaft sleeve (54).

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