Battery testing device

Abstract

The utility model discloses a battery testing device which comprises a supporting plate, a telescopic driving element and a limiting mechanism. The supporting plate is in transmission connection with the telescopic driving element, so that the supporting plate can be switched between a first station and a second station; the limiting mechanism comprises a first limiting plate, a second limiting plate and a first limiting piece, the first limiting plate is arranged on the supporting plate, a first limiting hole and a second limiting hole are formed in the first limiting plate, the second limiting plate is fixedly arranged, a first mounting hole is formed in the second limiting plate, and the first limiting piece is arranged in the first mounting hole; after the supporting plate is switched to the first station, the first limiting hole communicates with the first mounting hole, and the first limiting piece can further stretch into the first limiting hole; after the supporting plate is switched to the second station, the second limiting hole communicates with the first mounting hole, and the first limiting piece can further stretch into the second limiting hole. According to the utility model, the switching between the first station and the second station can be realized, and the operation safety can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a battery testing device. Background Art

[0002] With the rise and development of new energy, lithium batteries, as green high-energy chemical power sources, have been widely used in the new energy industry with the advantages of high energy, high power, and low cost. In order to ensure the safety of lithium battery modules, a series of tests are required before leaving the factory.

[0003] Helium inspection of batteries and replacement of battery boxes are two different working states. During testing, it is necessary to switch between the two working states and ensure the safety of the two working states to prevent misoperation. At present, it is difficult to ensure the safety of the two working states and the switching is inconvenient. Utility Model Content

[0004] The embodiment of the utility model provides a battery testing device, which can ensure the safety in two working states and is easy to switch.

[0005] The embodiment of the utility model provides a battery testing device, including a support plate, a telescopic driving element and a limiting mechanism;

[0006] The support plate is transmission-connected to the telescopic driving element so that the support plate can be switched between the first working position and the second working position;

[0007] The limiting mechanism comprises a first limiting plate, a second limiting plate and a first limiting member, wherein the first limiting plate is arranged on the supporting plate, a first limiting hole and a second limiting hole are formed on the first limiting plate, the second limiting plate is fixedly arranged, a first mounting hole is formed on the second limiting plate, and the first limiting member is arranged in the first mounting hole;

[0008] After the support plate is switched to the first working position, the first limiting hole is connected to the first mounting hole, and the first limiting member can also extend into the first limiting hole to achieve a first fixed connection between the first limiting plate and the second limiting plate;

[0009] After the support plate is switched to the second working position, the second limiting hole is connected to the first mounting hole, and the first limiting member can also extend into the second limiting hole to achieve a second fixed connection between the first limiting plate and the second limiting plate.

[0010] Optionally, the limiting mechanism further includes a second limiting member. The first limiting member is provided with a third limiting hole and a fourth limiting hole. A second mounting hole is further formed in the second limiting plate. The first mounting hole and the second mounting hole are communicated, and the extending directions of the first mounting hole and the second mounting hole intersect. The second limiting member is arranged in the second mounting hole, and the first limiting member can be switched between a first limit and a second limit;

[0011] After the first limiting member is switched to the first limit, the second limiting member can further extend into the third limiting hole so that the first limiting plate and the second limiting plate can move relative to each other;

[0012] After the first limiting member is switched to the second limit, the second limiting member can further extend into the fourth limiting hole so that the first fixed connection or the second fixed connection is formed between the first limiting plate and the second limiting plate.

[0013] Optionally, the first limiting member is in the shape of a pin shaft, and scale lines are arranged along the axial direction of the first limiting member.

[0014] Optionally, a positioning plane is formed on the surface of the first limiting member, and the third limiting hole and the fourth limiting hole are located in the positioning plane.

[0015] Optionally, the battery testing device further includes a controller, and the limiting mechanism further includes a proximity switch. The controller is electrically connected to the proximity switch and the telescopic driving element respectively, and the proximity switch is used to sense the first limiting member;

[0016] After the first limiting member is switched to the first limit, the proximity switch can generate a first signal; after the first limiting member is switched to the second limit, the proximity switch can generate a second signal.

[0017] Optionally, the limiting mechanism further includes a triggering element, and the triggering element is arranged on the first limiting member, and the proximity switch is used to sense the triggering element.

[0018] Optionally, the limiting mechanism further includes a mounting plate and a connecting member. A strip-shaped hole is formed in the mounting plate. The connecting member is connected to the second limiting plate, and the connecting member passes through the strip-shaped hole so that the mounting plate is connected to the second limiting plate, and the proximity switch is arranged on the mounting plate.

[0019] Optionally, the first limiting member includes a first working section and a second working section, and the first working section can extend into the first limiting hole or the second limiting hole;

[0020] The surface of the first working section is coated with antirust oil, and the surface of the second working section is coated with protective paint.

[0021] Optionally, the limiting mechanism further includes a buffer pad, the buffer pad is arranged on the second limiting plate, and the buffer pad is located between the second limiting plate and the support plate.

[0022] Optionally, the battery testing device further includes a base and at least two limiting columns. A transmission hole is formed in the support plate. The number of the transmission holes is equal to and corresponds to the number of the limiting columns one by one. The limiting columns, the second limiting plate and the telescopic driving element are arranged on the base. The limiting columns are parallel to each other. The support plate is sleeved on each limiting column through each transmission hole. Driven by the telescopic driving element, the support plate can axially move along the limiting columns.

[0023] In the battery testing device of the present utility model, when the support plate is switched to the first working position, the first limiting member can limit the first limiting plate and the second limiting plate, so that the first limiting plate and the second limiting plate are fixedly connected for the first time. When the support plate is switched to the second working position, the first limiting member can limit the first limiting plate and the second limiting plate, so that the first limiting plate and the second limiting plate are fixedly connected for the second time, ensuring the safety of the support plate in two working scenarios of the first working position and the second working position. At the same time, by switching the first limiting member in the first limiting hole and the second limiting hole, the switching between the first working position and the second working position can be realized, and the safety of its operation can be ensured. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the battery testing device of the present utility model;

[0026] Figure 2 It is a schematic structural diagram of an embodiment of the limiting mechanism of the present utility model;

[0027] Figure 3 For Figure 2 exploded view;

[0028] Figure 4 It is a schematic structural diagram of another embodiment of the battery testing device of the present utility model;

[0029] Figure 5This is a schematic structural diagram of another embodiment of the limiting mechanism of the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] Battery testing device, 100; support plate, 10; transmission hole, 12; telescopic driving element, 20; limiting mechanism, 30; first limiting plate, 31; first limiting hole, 312; second limiting hole, 314; second limiting plate, 32; first mounting hole, 322; second mounting hole, 324; first limiting member, 33; first working section, 331; third limiting hole, 332; second working section, 333; fourth limiting hole, 334; scale line, 336; positioning plane, 338; second limiting member, 34; proximity switch, 35; triggering element, 36; mounting plate, 37; strip-shaped hole, 372; connecting member, 38; buffer pad, 39; base, 40; limiting column, 50.

[0032] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0036] Please refer to Figures 1 to 3 , Figure 1is a schematic structural diagram of a battery testing device 100 , wherein the support plate 10 is in a first working position. Figure 2 is a schematic diagram of the structure of the limiting mechanism 30, Figure 3 yes Figure 2 Exploded diagram. The embodiment of the utility model provides a battery testing device 100, including a support plate 10, a telescopic driving element 20 and a limiting mechanism 30; the support plate 10 and the telescopic driving element 20 are connected in transmission so that the support plate 10 can switch between a first station and a second station; the limiting mechanism 30 includes a first limiting plate 31, a second limiting plate 32 and a first limiting member 33, the first limiting plate 31 is arranged on the support plate 10, the first limiting plate 31 is provided with a first limiting hole 312 and a second limiting hole 314, the second limiting plate 32 is fixedly arranged, and the second limiting plate 32 is provided with a first installation Hole 322, the first limiting member 33 is arranged in the first mounting hole 322; after the support plate 10 switches to the first working position, the first limiting hole 312 and the first mounting hole 322 are connected, and the first limiting member 33 can also extend into the first limiting hole 312 to realize the first fixed connection between the first limiting plate 31 and the second limiting plate; after the support plate 10 switches to the second working position, the second limiting hole 314 and the first mounting hole 322 are connected, and the first limiting member 33 can also extend into the second limiting hole 314 to realize the second fixed connection between the first limiting plate 31 and the second limiting plate 32.

[0037] In the battery testing device 100 of this embodiment, the telescopic driving element 20 can be a cylinder. The telescopic driving element 20 is used to drive the support plate 10 to move. For example, the telescopic driving element 20 can drive the support plate 10 to move in the vertical direction. At this time, the first limiting hole 312 and the second limiting hole 314 are distributed in the vertical direction. For example, the first limiting hole 312 is located above the second limiting hole 314. When the support plate 10 does not reach the first working position or the second working position, the first limiting member 33 cannot limit the first limiting plate 31 and the second limiting plate 32. At this time, the telescopic driving element 20 can drive the support plate 10 to move up and down, enabling maintenance of the telescopic driving element 20, the support plate 10, etc. or adjustment of the position of the support plate 10. Driven by the telescopic driving element 20, when the first limiting hole 312 and the first mounting hole 322 are communicated, that is, the telescopic driving element 20 pulls down the support plate 10. A part of the first limiting member 33 is located in the first mounting hole 322, and another part of the first limiting member 33 extends into the first limiting hole 312. At this time, the first limiting member 33 limits the first limiting plate 31 and the second limiting plate 32, and the first limiting plate 31 and the second limiting plate 32 are in the first fixed connection state, and the first limiting plate 31 and the second limiting plate 32 cannot move relative to each other. The support plate 10 is in the first working position, and operations such as replacing the battery box can be performed on the support plate 10, ensuring the safety of its operation and avoiding misoperation of the telescopic driving element 20 driving the support plate 10. Driven by the telescopic driving element 20, when the second limiting hole 314 and the first mounting hole 322 are communicated, that is, the telescopic driving element 20 jacks up the support plate 10. A part of the first limiting member 33 is located in the first mounting hole 322, and another part of the first limiting member 33 extends into the second limiting hole 314. At this time, the first limiting member 33 also limits the first limiting plate 31 and the second limiting plate 32, and the first limiting plate 31 and the second limiting plate 32 are in the second fixed connection state, and the first limiting plate 31 and the second limiting plate 32 also cannot move relative to each other. The support plate 10 is in the second working position, and operations such as helium leak detection can be performed on the support plate 10, ensuring safety and avoiding misoperation of the telescopic driving element 20 driving the support plate 10.

[0038] In the battery testing device 100 of this embodiment, when the support plate 10 is switched to the first working position, the first limiting member 33 can limit the first limiting plate 31 and the second limiting plate 32, enabling the first limiting plate 31 and the second limiting plate 32 to achieve the first fixed connection. When the support plate 10 is switched to the second working position, the first limiting member 33 can limit the first limiting plate 31 and the second limiting plate 32, enabling the first limiting plate 31 and the second limiting plate 32 to achieve the second fixed connection, ensuring the safety in the two working scenarios of the support plate being in the first working position and the second working position. At the same time, through the switching of the first limiting member 33 in the first limiting hole 312 and the second limiting hole 314, the switching between the first working position and the second working position can be realized, and the safety of its operation can be ensured.

[0039] In one embodiment, the limiting mechanism 30 further includes a second limiting member 34. The first limiting member 33 is provided with a third limiting hole 332 and a fourth limiting hole 334. A second mounting hole 324 is further formed in the second limiting plate 32. The first mounting hole 322 and the second mounting hole 324 communicate with each other. The extending directions of the first mounting hole 322 and the second mounting hole 324 are arranged intersectingly. The second limiting member 34 is disposed in the second mounting hole 324. The first limiting member 33 can be switched between a first limit position and a second limit position. After the first limiting member 33 is switched to the first limit position, the second limiting member 34 can further extend into the third limiting hole 332 to enable relative movement between the first limiting plate 31 and the second limiting plate 32. After the first limiting member 33 is switched to the second limit position, the second limiting member 34 can further extend into the fourth limiting hole 334 to form a first fixed connection or a second fixed connection between the first limiting plate 31 and the second limiting plate 32.

[0040] The extending directions of the first mounting hole 322 and the second mounting hole 324 are arranged intersectingly, which means that the extension lines of the axes of the first mounting hole 322 and the second mounting hole 324 intersect, that is, the first mounting hole 322 and the second mounting hole 324 are neither parallel nor coaxial. For example, the first mounting hole 322 and the second mounting hole 324 can be vertically communicated. When the first limiting member 33 is in the first limit position, the first limiting plate 31 and the second limiting plate 32 can move relatively, and the telescopic driving element 20 can drive the support plate 10 to move up and down. At this time, the first limiting member 33 is in a "pulled out" state, and the second limiting member 34 extends into the third limiting hole 332 to limit the first limiting member 33 and prevent the first limiting member 33 from affecting the relative movement between the first limiting plate 31 and the second limiting plate 32. When the first limiting member 33 is in the second limit position, the support plate 10 is in the first working position or the second working position. Another part of the first limiting member 33 further extends into the first limiting hole 312 or the second limiting hole 314. The first limiting member 33 is in an "inserted" state, and the second limiting member 34 extends into the fourth limiting hole 334 to limit the first limiting member 33 and ensure that the first limiting member 33 can limit the first limiting plate 31 and the second limiting plate 32 and prevent phenomena such as mislimiting of the first limiting member 33 to the first limiting plate 33 and the second limiting plate 32. By providing the second limiting member 34, the first limiting member 33 can be limited, ensuring the safety and accuracy of the limiting of the first limiting member 33 and preventing phenomena such as mistakes of the first limiting member 33.

[0041] In one embodiment, the first limiting member 33 is in the shape of a pin shaft, and the first limiting member 33 is provided with scale lines 336 along its axial direction. By providing the scale lines 336 on the first limiting member 33, it can visually show whether the first limiting member 33 is inserted into the first limiting hole 312 or the second limiting hole 314 and whether it is inserted in place. This further ensures the safety and accuracy of the limiting function of the first limiting member 33 and avoids mistakes. Among them, the scale lines 336 can be in the shape of arrows, which have an indicating effect on the insertion direction and depth of the first limiting member 33.

[0042] In one embodiment, a positioning plane 338 is formed on the surface of the first limiting member 33, and the third limiting hole 332 and the fourth limiting hole 334 are located in the positioning plane 338. The positioning plane 338 is milled flat by a milling process. By providing the positioning plane 338, when one of the second mounting holes 324 and the third limiting hole 332 and the fourth limiting hole 334 communicates, the second limiting member 34 can be quickly inserted into the third limiting hole 332 or the fourth limiting hole 334, which is convenient for insertion and not prone to mistakes.

[0043] In one embodiment, the first limiting member 33 includes a first working section 331 and a second working section 333. The first working section 331 can extend into the first limiting hole 312 or the second limiting hole 314; the surface of the first working section 331 is coated with antirust oil, and the surface of the second working section 333 is coated with protective paint. There is friction between the first working section 331 and the inner walls of the third limiting hole 332 and the fourth limiting hole 334. By providing the antirust oil, phenomena such as jamming of the second limiting member 34 can be avoided. Among them, the second limiting member 34 can also be in the shape of a pin shaft. The protective paint provided on the second working section 333 can prevent rust. In some embodiments, the second limiting member 34 can be made of stainless steel material to prevent rust.

[0044] Please refer to Figures 4 to 5 , Figure 4 which is another structural schematic diagram of the battery testing device 100, where the support plate 10 is in the second working position. Figure 5 which is another structural schematic diagram of the limiting mechanism 30, where Figure 5 two states of the first limiting plate 31 are shown. When the support plate 10 is in the first working position, the first limiting plate 31 is in the Figure 5 solid line state in the figure, and when the support plate 10 is in the second working position, the first limiting plate 31 is in the Figure 5The dashed line state in [it]. In one embodiment, the battery testing device 100 further includes a controller (not shown in the figure). The limiting mechanism 30 further includes a proximity switch 35. The controller is electrically connected to the proximity switch 35 and the telescopic driving element 20 respectively. The proximity switch 35 is used to sense the first limiting member 33. After the first limiting member 33 switches to the first limit, the proximity switch 35 can generate a first signal. After the first limiting member 33 switches to the second limit, the proximity switch 35 can generate a second signal.

[0045] The controller can be a microcontroller, a circuit board or other components with control functions. The proximity switch 35 is used to sense what state the first limiting member 33 is in and whether it is in place. For example, when the first limiting member 33 switches to the first limit, the first limiting member 33 should be in the "pulled out" state. At this time, the proximity switch 35 can sense the first limiting member 33, and the first limiting plate 31 and the second limiting plate 32 can move relative to each other. Under the unified control of the controller, the proximity switch 35 emits a first signal, and the telescopic driving element 20 can drive the support plate 10 to move up and down. When the first limiting member 33 switches to the second limit, the first limiting member 33 is in the "inserted" state. The first limiting member 33 limits the first limiting plate 31 and the second limiting plate 32, and the first limiting plate 31 and the second limiting plate 32 are in the state of the first fixed connection or the second fixed connection, and the first limiting plate 31 and the second limiting plate 32 cannot move relative to each other. At this time, the proximity switch 35 cannot sense the first limiting member 33, the proximity switch 35 emits a second signal, and the controller does not control the telescopic driving element 20 to act, avoiding mis-starting of the telescopic driving element 20 and avoiding damage to the battery, the second limiting plate 32, etc. The battery testing device 100 of this embodiment, by setting components such as the proximity switch 35 and the controller, can not only achieve unified and coordinated control, but also further ensure the safety of the support plate 10, the second limiting plate 32, the battery, etc., and avoid misoperation.

[0046] In one embodiment, the limiting mechanism 30 further includes a triggering element 36. The triggering element 36 is arranged on the first limiting member 33, and the proximity switch 35 is used to sense the triggering element 36. The triggering element 36 can be a screw, and the screw is connected to the first limiting member 33. By setting the triggering element 36, the proximity switch 35 can be accurately triggered, so that the proximity switch 35 accurately generates a first signal or a second signal, avoiding phenomena such as induction errors.

[0047] In one embodiment, the limiting mechanism 30 further includes a mounting plate 37 and a connecting member 38. A strip-shaped hole 372 is formed in the mounting plate 37. The connecting member 38 is connected to the second limiting plate 32 and passes through the strip-shaped hole 372, so that the mounting plate 37 is connected to the second limiting plate 32. The proximity switch 35 is arranged on the mounting plate 37. The connecting member 38 can be a screw. The screw is connected to the second limiting plate 32. By adjusting the relative position of the screw in the strip-shaped hole 372, the relative position of the mounting plate 37 and the second limiting plate 32 can be adjusted, and further the mounting position of the proximity switch 35 can be adjusted. The installation is convenient and the adjustment is convenient.

[0048] In one embodiment, the number of the strip-shaped holes 372 is two, and the two strip-shaped holes 372 are parallel to each other. Two connecting members 38 are arranged in each strip-shaped hole 372, which can further improve the connection strength between the mounting plate 37 and the second limiting plate 32.

[0049] In one embodiment, the limiting mechanism 30 further includes a buffer pad 39. The buffer pad 39 is arranged on the second limiting plate 32 and is located between the second limiting plate 32 and the support plate 10. The buffer pad 39 has a buffering effect. When the support plate 10 moves towards the direction close to the second limiting plate 32, that is, when the support plate 10 moves downward, at this time, the first mounting hole 322 and the first limiting hole 312 are communicated. The buffer pad 39 produces a buffering effect between the support plate 10 and the second limiting plate 32, avoiding damage to the support plate 10 and the second limiting plate 32. Among them, the buffer pad 39 can be made of materials such as rubber, and the buffer pad 39 can be connected to the top end of the second limiting plate 32 by means of screw connection or the like.

[0050] In one embodiment, the battery testing device 100 further includes a base 40 and at least two limiting columns 50. Transmission holes 12 are formed in the support plate 10. The number of the transmission holes 12 is equal to and corresponds to the number of the limiting columns 50 one by one. The limiting columns 50, the second limiting plate 32 and the telescopic driving element 20 are arranged on the base 40. The limiting columns 50 are parallel to each other. The support plate 10 is sleeved on each limiting column 50 through each transmission hole 12. Driven by the telescopic driving element 20, the support plate 10 can move axially along the limiting column 50. Specifically, the number of the limiting columns 50 is four, and four transmission holes 12 are arranged on the support plate 10. The four transmission holes 12 are located at the four corners of the support plate 10. When the telescopic driving element 20 extends, it can lift the support plate 10. When the telescopic driving element 20 contracts, it can pull down the support plate 10. The support plate 10 can move stably in the vertical direction.

[0051] In one embodiment, a linear bearing is arranged in each transmission hole 12, and the linear bearing is sleeved on the limiting column 50. With such a setting, the support plate 10 moves more smoothly along the axial direction of the limiting column 50.

[0052] In one embodiment, the limiting mechanism 30 may be one or more. When there are multiple limiting mechanisms 30, the telescopic driving element 20 is located at the center of the base 40, and each limiting mechanism 30 is evenly distributed along the circumferential direction of the telescopic driving element 20. With this setting, the limiting of each part of the support plate 10 by the limiting mechanism 30 is more uniform, and the force on the support plate 10 is more stable.

[0053] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A battery testing device, characterized in that: It includes a support plate, a telescopic driving element and a limiting mechanism; The support plate is transmission-connected to the telescopic driving element so that the support plate can be switched between the first working position and the second working position; The limiting mechanism comprises a first limiting plate, a second limiting plate and a first limiting member, wherein the first limiting plate is arranged on the supporting plate, a first limiting hole and a second limiting hole are formed on the first limiting plate, the second limiting plate is fixedly arranged, a first mounting hole is formed on the second limiting plate, and the first limiting member is arranged in the first mounting hole; After the support plate is switched to the first working position, the first limiting hole is connected to the first mounting hole, and the first limiting member can also extend into the first limiting hole to achieve a first fixed connection between the first limiting plate and the second limiting plate; After the support plate is switched to the second working position, the second limiting hole is connected to the first mounting hole, and the first limiting member can also extend into the second limiting hole to achieve a second fixed connection between the first limiting plate and the second limiting plate.

2. The battery testing device according to claim 1, characterized in that: The limiting mechanism further includes a second limiting member, the first limiting member is provided with a third limiting hole and a fourth limiting hole, the second limiting plate is further provided with a second mounting hole, the first mounting hole is communicated with the second mounting hole, the extension direction of the first mounting hole and the extension direction of the second mounting hole are arranged to intersect, the second limiting member is arranged in the second mounting hole, and the first limiting member can switch between the first limiting position and the second limiting position; After the first limiting member is switched to the first limiting position, the second limiting member can also extend into the third limiting hole, so that the first limiting plate and the second limiting plate can move relative to each other; After the first limiting member is switched to the second limiting member, the second limiting member can also extend into the fourth limiting hole, so that the first fixed connection or the second fixed connection is formed between the first limiting plate and the second limiting plate.

3. The battery testing device according to claim 2, characterized in that: The first limiting member is pin-shaped, and a scale line is provided along the axial direction of the first limiting member.

4. The battery testing device according to claim 3, characterized in that: A positioning plane is formed on the surface of the first limiting member, and the third limiting hole and the fourth limiting hole are located in the positioning plane.

5. The battery testing device according to claim 2, characterized in that: It also includes a controller, the limiting mechanism also includes a proximity switch, the controller and the proximity switch and the telescopic driving element are electrically connected respectively, and the proximity switch is used to sense the first limiting member; After the first limit member is switched to the first limit position, the proximity switch can generate a first signal; After the first limit member is switched to the second limit position, the proximity switch can generate a second signal.

6. The battery testing device according to claim 5, characterized in that: The limiting mechanism further includes a trigger element, which is disposed on the first limiting member, and the proximity switch is used to sense the trigger element.

7. The battery testing device according to claim 5, characterized in that: The limiting mechanism also includes a mounting plate and a connecting piece, wherein a strip hole is formed on the mounting plate, the connecting piece is connected to the second limiting plate, and the connecting piece is passed through the strip hole so that the mounting plate is connected to the second limiting plate, and the proximity switch is arranged on the mounting plate.

8. The battery testing device according to claim 1, characterized in that: The first limiting member includes a first working section and a second working section, and the first working section can extend into the first limiting hole or the second limiting hole; The surface of the first working section is coated with anti-rust oil, and the surface of the second working section is coated with protective paint.

9. The battery testing device according to claim 1, characterized in that: The limiting mechanism further includes a buffer pad, which is arranged on the second limiting plate and located between the second limiting plate and the supporting plate.

10. The battery testing device according to claim 1, characterized in that: It also includes a base and at least two limit columns, the support plate is provided with transmission holes, the number of the transmission holes is equal to and corresponds to the number of the limit columns, the limit columns, the second limit plate and the telescopic driving element are arranged on the base, the limit columns are parallel to each other, the support plate is sleeved on the limit columns through the transmission holes, and under the drive of the telescopic driving element, the support plate can move axially along the limit columns.

Images