Device for testing pressure resistance of power battery shell

Abstract

The invention discloses a device for testing the pressure resistance of a power battery shell, and belongs to the technical field of power battery shell detection. The device mainly comprises a workbench; the clamping mechanism is provided with a clamping rod for clamping the power battery shell; the downward pressing mechanism is provided with a downward pressing plate for extruding the power battery shell; two groups of first bearing seats are mounted on the two groups of base plates; a first rotating shaft; sliding plates are mounted on the mounting parts; the rack is installed in the sliding groove in a sliding mode, the rack is composed of meshing teeth and a smooth section, and a gear is installed on the first rotating shaft; the telescopic ends of the third air cylinders make contact with the bottom face of the base plate. According to the device for testing the pressure resistance of the power battery shell, the power battery shell is clamped and fixed through the clamping mechanism, pressure can be applied to the power battery shell through the pressing mechanism so as to detect the pressure resistance of the power battery shell, and the power battery shell can be turned over through the turnover mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of power battery shell detection, and specifically to a power battery shell pressure resistance performance testing device. Background Art

[0002] Power batteries are power sources that provide power for tools. They are generally used in electric vehicles such as electric cars, electric trains, electric bicycles, and large energy storage systems. The main difference between them and ordinary batteries is that they can provide high energy density and high power density to meet the power requirements of vehicles and the energy storage and release requirements of energy storage systems. The power battery shell pressure resistance test is mainly to evaluate the safety and reliability of the battery shell when it is subjected to internal or external pressure. This test can ensure that the battery shell will not break or leak in normal use and in extreme situations that may be encountered (such as a short circuit inside the battery to produce a large amount of gas, external compression, etc.), thereby avoiding serious safety accidents such as electrolyte leakage, fire or even explosion inside the battery; When testing the pressure resistance of a power battery shell, the strain gauge is firmly attached to the surface of the battery shell and then the battery shell with the strain gauge fixed is placed in the fixture of the test equipment so that one side of the battery shell faces the direction of pressure application. The pressure test equipment is started to collect data in real time through the strain sensor and the pressure sensor. After the first side test is completed, the battery shell is removed from the fixture and carefully turned over so that the other side to be tested faces the direction of pressure application, and the battery shell is placed in the fixture again for testing.

[0003] However, in the traditional battery shell pressure resistance performance test, the battery shell needs to be removed from the fixture after each test on one side, flipped over, and then put back into the fixture for testing. This method involves multiple disassembly and installation operations, and the operation process is more cumbersome; at the same time, each time the battery shell is removed from the fixture and reinstalled, the position of the strain gauge may change slightly during measurement. The accuracy of the strain gauge position is crucial to the accuracy of the test data, because its position change may cause the strain data measured by the strain gauge to deviate from the actual strain situation. Therefore, it is necessary to provide a power battery shell pressure resistance performance test device to solve the above problems.

[0004] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0005] Based on the above-mentioned problems existing in the prior art, the problem to be solved by the present application is: to provide a power battery shell pressure resistance performance testing device, so as to complete the pressure resistance test of different surfaces of the power battery shell in a short time, avoiding the tedious disassembly and reinstallation process.

[0006] The technical solution adopted by the present application to solve its technical problems is: a power battery shell pressure resistance performance test device, characterized in that it includes: a test device, the test device includes a workbench; a clamping mechanism, the clamping mechanism is installed on the workbench, the clamping mechanism has a clamping rod for clamping the power battery shell, and a first cylinder for driving the clamping rod to move, and a placement seat for supporting the first cylinder; a pressing mechanism, the pressing mechanism is installed on the workbench, the pressing mechanism has a pressing plate for squeezing the power battery shell, and a hydraulic cylinder for driving the pressing plate to move; a flipping mechanism, the flipping mechanism is installed on the workbench, the flipping mechanism includes: two sets of base plates, the base plates are placed on the workbench, Two groups of first bearing seats are installed on the base plate; a first rotating shaft, which is installed on the placement seat; two groups of mounting parts, which are installed on the pressing mechanism, and a slide is installed on the mounting parts, and the slide has a sliding groove opening downward; a rack, which is slidably installed in the sliding groove, and the rack consists of meshing teeth and a smooth section, and a gear is installed on the first rotating shaft; two groups of third cylinders, which are installed inside the testing equipment, and the telescopic end of the third cylinder moves through the workbench and contacts with the bottom surface of the base plate; the second cylinder, which is installed on the pressing mechanism, and the telescopic end of the second cylinder moves through the slide and is connected to the rack.

[0007] Furthermore, a through slot is provided on the workbench, a flip motor is installed on the bottom surface of the workbench, a second rotating shaft is installed on the output end of the flip motor, and a support platform is sleeved on the second rotating shaft; The support platform is located in the through groove, a second bearing seat is installed on the workbench, and the other end of the second rotating shaft is rotatably connected to the second bearing seat.

[0008] Furthermore, the second rotating shaft is located at an upper position on the support platform, and in an initial state, a straight-line distance between the top surface of the support platform and the second rotating shaft is smaller than a straight-line distance between the bottom surface of the support platform and the second rotating shaft.

[0009] Furthermore, a control plate is installed on the base plate, a limiting column is installed on the bottom of the control plate, the limiting column passes through the base plate and is slidably connected to the base plate, a second spring is installed between the control plate and the base plate, and the second spring is sleeved on the limiting column.

[0010] Furthermore, the control panel has a vertically opened first slide, two sets of mounting back plates are installed on the workbench, a fixed seat is installed on the mounting back plate, a control rod is hinged on the fixed seat, the control rod has a sliding ball, the sliding ball is in the first slide in a default state, the sliding ball is made of elastic material, a first switch is arranged in the first slide, the first switch controls the start-up of the first cylinder and the shutdown of the second cylinder, and the first cylinder can be controlled by an external switch.

[0011] Furthermore, a second slide is connected to the first slide, the bottom of the second slide is lower than the bottom of the first slide, a third slide is connected to the second slide, the bottom of the third slide is lower than the bottom of the second slide, a first step is provided between the third slide and the second slide, a first vertex is provided at the connection between the third slide and the second slide, and the first vertex is located in the third slide.

[0012] Furthermore, the first vertex is provided with a second switch, and the second switch controls the start-up of the second cylinder and the flip motor.

[0013] Furthermore, the third slide is connected to the first slide, and a transition slope is provided at the connection between the third slide and the first slide. The transition slope gradually rises along the position close to the first slide, and the highest position of the transition slope is higher than the bottom position of the first slide and forms a second step.

[0014] Furthermore, a slide groove is provided on the transition slope, a protruding block is slidably installed on the slide groove, a first spring is connected between the protruding block and one end of the inner wall of the slide groove, a third switch is installed at the upper side end of the protruding block, and the third switch controls the closing of the first cylinder.

[0015] Further, a stabilizing mechanism is installed on the bottom surface of the workbench, and the stabilizing mechanism includes two sets of fixing plates installed on the bottom surface of the workbench, and the fixing plates have storage slots, and a third spring is installed inside the storage slot, and an insert block is installed at one end of the third spring, and a part of the insert block is inside the storage slot, and the remaining part of the insert block extends out of the storage slot; Support blocks are installed on both sides of the support platform. A slot is provided on one side of the support block close to the insert block. A first electromagnet is installed on one side of the insert block close to the slot. A second electromagnet is installed inside the slot.

[0016] The beneficial effects of the present application are: a power battery shell pressure resistance performance testing device provided by the present application clamps and fixes the power battery shell through a clamping mechanism to avoid displacement during the pressure application process, and applies pressure to the power battery shell through a pressing mechanism to detect the pressure resistance performance of the power battery shell, and flips the power battery shell over through a flipping mechanism.

[0017] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is an overall schematic diagram of a power battery shell pressure resistance performance testing device in this application; Figure 2 for Figure 1 Structural schematic diagram of the clamping mechanism and the pressing mechanism in FIG. Figure 3 for Figure 2 Schematic diagram of the bottom structure; Figure 4 for Figure 2 Schematic diagram of the flip mechanism structure; Figure 5 for Figure 4 A magnified schematic diagram of the middle A area; Figure 6 for Figure 4 A magnified schematic diagram of the middle B area; Figure 7 for Figure 4 Schematic diagram of the local structure; Figure 8 for Figure 7 Enlarged schematic diagram of the middle C area; Among them, the reference numerals in the figure are: 1. Testing equipment; 101. Workbench; 102. Through slot; 2. Clamping mechanism; 201. Placement seat; 202. First cylinder; 203. Clamping rod; 3. Pressing mechanism; 301. Support seat; 302. Hydraulic cylinder; 303. Pressing plate; 4. Flipping mechanism; 401. Base plate; 402. First bearing seat; 403. First rotating shaft; 404. Gear; 405. Mounting piece; 406. Slide plate; 407. Second cylinder; 408. Rack; 409. Meshing teeth; 410. Smooth section; 411. Third cylinder; 412. Mounting back plate; 413. Control board; 414. First slideway; 415. Fixed seat; 416. Control rod; 417. Second slideway; 418. First vertex; 419. Third slideway; 420. Slideway; 421. Protruding block; 422. First spring; 423. Limiting column; 424. Second spring; 425. Flipping motor; 426. Second rotating shaft; 427. Second bearing seat; 428. Support table; 5. Stabilizing mechanism; 501. Fixing plate; 502. Storage slot; 503. Third spring; 504. Insert block; 505. Support block. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] Embodiment 1: This embodiment describes the structure and working principle of a power battery shell pressure resistance performance testing device, specifically: like Figure 1-Figure 2 and Figure 5 As shown, the present application provides a power battery shell pressure resistance performance test device, including a test device 1, the test device 1 includes a workbench 101, and a clamping mechanism 2 is installed on the workbench 101, the clamping mechanism 2 is used to clamp the power battery shell to be tested placed on the workbench 101; The clamping mechanism 2 includes two sets of placement seats 201 installed on the upper end of the workbench 101, and a first cylinder 202 is fixedly installed on the placement seat 201, and a clamping rod 203 is fixedly installed at the telescopic end of the first cylinder 202, and the clamping rod 203 has two sets of protrusions, and the protrusions are made of elastic silicone material, and the protrusions are suitable for close contact with the power battery shell, so that the power battery shell is suitable for being placed on the workbench 101 and between the two sets of clamping rods 203, and the clamping rod 203 is suitable for clamping or loosening the power battery shell as the telescopic end of the first cylinder 202 approaches or moves away from the power battery shell; A pressing mechanism 3 is installed on the workbench 101, and the pressing mechanism 3 is used to apply pressure to the power battery shell. The pressing mechanism 3 includes a support seat 301 fixedly installed on the workbench 101, and a hydraulic cylinder 302 is fixedly installed on the support seat 301. The telescopic end of the hydraulic cylinder 302 passes through the support seat 301, and a pressing plate 303 is fixedly installed on the telescopic end of the hydraulic cylinder 302; Thus, the lower pressing plate 303 is adapted to contact the upper surface of the power battery shell under the action of the hydraulic cylinder 302 to apply pressure to the power battery shell; In summary: by placing the power battery shell to be tested on the workbench 101, and by starting the first cylinder 202 to drive the clamping rod 203 to gradually approach the power battery shell, the power battery shell is clamped to ensure that the power battery shell will not be displaced during the pressure process, and by connecting the strain gauge to the lower pressure plate 303, so as to accurately obtain the deformation data of the power battery shell, finally start the pressing mechanism 3, and push the lower pressure plate 303 gradually close to the power battery shell through the telescopic end of the hydraulic cylinder 302, and gradually increase the pressure on the battery shell according to the set loading speed. During the loading process, the equipment will record the pressure size and the deformation data of the battery shell in real time. During the pressure loading process, carefully observe the changes in the appearance of the battery shell. Pay attention to whether there are local deformations that are too large, cracks, paint peeling, etc.

[0022] Example 2: In the above-mentioned example of the battery shell pressure resistance performance, after each test of one surface, the battery shell needs to be taken out of the fixture, turned over, and then put back into the fixture for testing. This method involves multiple disassembly and installation operations, and the operation process is more cumbersome; In order to solve the above problems, Figure 1 and Figure 4-Figure 5As shown, different from the above embodiment, a flipping mechanism 4 is installed on the workbench 101, and the flipping mechanism 4 is used to flip the power battery shell, and the flipping mechanism 4 includes two groups of base plates 401 placed on the workbench 101, and the two groups of base plates 401 are respectively arranged on both sides of the two groups of placement seats 201, and two groups of first bearing seats 402 are fixedly installed on the base plates 401, and a first rotating shaft 403 is fixedly installed on one side of the placement seat 201 close to the first bearing seat 402; In this embodiment, the placement seat 201 is no longer installed on the workbench 101, but is rotatably connected to the first bearing seat 402 through the first rotating shaft 403, so that after the power battery shell is clamped by the two sets of clamping rods 203, the placement seat 201 can be rotated along the axis of the first bearing seat 402 through the first rotating shaft 403 to turn over the power battery shell; In order to drive the clamped power battery shell to flip, Figure 5-Figure 7 As shown, two sets of mounting members 405 are fixedly mounted on the support seat 301, and a slide plate 406 is fixedly mounted on the mounting members 405, and the slide plate 406 has a sliding groove (not marked in the figure) opening downward; A rack 408 is slidably installed in the sliding groove, and the rack 408 is composed of meshing teeth 409 and a smooth section 410. At the same time, a gear 404 is fixedly installed on the first rotating shaft 403, and the gear 404 is suitable for meshing with the meshing teeth 409. Two sets of third cylinders 411 are fixedly installed inside the testing device 1, and the telescopic ends of the third cylinders 411 are movably installed through the bottom surface of the workbench 101 and the base plate 401; It should be noted that, in the initial state, the gear 404 is located at the position of the smooth section 410 on the rack 408; Thus, the base plate 401 is suitable for moving with the telescopic end of the third cylinder 411, so as to drive the first bearing seat 402 to move upward, and the first bearing seat 402 is suitable for driving the clamping mechanism 2 to move upward, so as to drive the clamped power battery shell to move upward, and during the upward movement, the gear 404 gradually approaches the meshing tooth 409 and meshes with it, so as to drive the clamped power battery shell to flip, and when the gear 404 completely passes over the meshing tooth 409, the power battery shell completes a 90-degree flip, so as to realize the flipping operation of the power battery shell; In order to avoid that when the third cylinder 411 is reset, the gear 404 meshes with the meshing tooth 409 again and rotates, and the power battery shell rotates to restore the initial state, such as Figure 6 As shown, a second cylinder 407 is fixedly mounted on the mounting member 405, and the telescopic end of the second cylinder 407 movably penetrates the slide plate 406 and is connected to the rack 408, so that the rack 408 is suitable for moving with the telescopic end of the second cylinder 407 to approach or move away from the gear 404; Therefore, when the gear 404 completely passes over the meshing tooth 409 and the power battery case is turned over 90 degrees, the second cylinder 407 is started to drive the rack 408 to move so that the rack 408 is away from the gear 404. As the third cylinder 411 is reset, the rack 408 is no longer meshed with the gear 404, and the power battery case is still in the 90-degree flip state; In order to make the hydraulic cylinder 302 drive the lower pressing plate 303 to press down with the same stroke, Figure 3 As shown, a through slot 102 is provided on the workbench 101, and a flip motor 425 is fixedly installed on the bottom surface of the workbench 101, and a second rotating shaft 426 is fixedly installed on the output end of the flip motor 425, and a support platform 428 is fixedly sleeved on the second rotating shaft 426; The support platform 428 is used to support the power battery shell, and the support platform 428 is in the through groove 102. At the same time, a second bearing seat 427 is fixedly installed on the workbench 101. The other end of the second rotating shaft 426 is rotatably connected to the second bearing seat 427, so that the second rotating shaft 426 is suitable for rotating with the output end of the flip motor 425 to drive the support platform 428 to flip; It should be noted that the power battery shell applicable to the present embodiment is rectangular, so there are two detection positions of the power battery shell during the flipping process, which can be defined as the first detection position in the initial state and the second detection position after flipping, respectively. Therefore, the top surface and the bottom surface of the support platform 428 can correspond to the above two detection positions respectively. For the convenience of explanation, the top surface of the support platform 428 is used to support the first detection position of the power battery shell, and the bottom surface of the support platform 428 is used to support the second detection position of the power battery shell, and the support platform 428 can switch the top surface and the bottom surface through the second rotating shaft 426; In the initial state, the top surface of the support platform 428 supports the power battery shell so that the power battery shell is in the first detection position. At this time, the telescopic end of the hydraulic cylinder 302 pushes the lower pressure plate 303 to gradually approach the power battery shell and performs a pressure resistance test on it. After the test is completed, the hydraulic cylinder 302 is reset; When it is necessary to perform a withstand voltage test on the second detection position of the power battery shell, the third cylinder 411 is started again to push the base plate 401 upward, so that the gear 404 gradually approaches the meshing tooth 409 and meshes with it. At this time, the clamped power battery shell is turned over, and when the gear 404 completely passes over the meshing tooth 409, the power battery shell completes a 90-degree turn to realize the flip operation of the power battery shell. At this time, the flip motor 425 is started again to drive the support platform 428 to flip 180 degrees, so that the top surface of the support platform 428 faces downward and the bottom surface faces upward (refer to Figure 4), and then as the third cylinder 411 is reset, the flipped power battery shell moves downward synchronously, and when the power battery shell gradually approaches the bottom surface of the support platform 428, the first cylinder 202 is synchronously started to drive the clamping rod 203 to move away from the power battery shell by a certain distance, so that the power battery shell falls on the support platform 428 by its own gravity, so as to avoid the clamped power battery from squeezing the support platform 428 after flipping, and to make the distance between the lower pressure plate 303 and the power battery shell always the same, and as the third cylinder 411 returns to its initial state, the first cylinder 202 is started again to drive the clamping rod 203 to clamp the power battery shell, and the hydraulic cylinder 302 is started to push the lower pressure plate 303 gradually close to the second detection position of the power battery shell, and the pressure resistance performance test is performed on the second detection position of the power battery shell. After the test is completed, the hydraulic cylinder 302 is reset; In order to control the timing of the rotation of the power battery shell, Figure 4 and Figure 6-Figure 8 As shown, a control board 413 is mounted on the base plate 401, and a limiting column 423 is fixedly mounted on the bottom of the control board 413. The limiting column 423 penetrates the base plate 401 and is slidably connected to the base plate 401. At the same time, a second spring 424 is fixedly mounted between the control board 413 and the base plate 401, and the second spring 424 is sleeved on the limiting column 423; Therefore, when the third cylinder 411 pushes the base plate 401 to move upward, the control plate 413 is driven to move upward synchronously. As the control plate 413 moves upward, the limit column 423 ensures the stable sliding of the control plate 413 in the vertical direction. At the same time, when the control plate 413 moves to the limit position, the third cylinder 411 can still push the base plate 401 to move upward and squeeze the second spring 424. At the same time, the control board 413 has a first slideway 414 opened vertically, and two sets of mounting back plates 412 are fixedly installed on the workbench 101. A fixing seat 415 is fixedly installed on the mounting back plates 412, and a control rod 416 is hinged on the fixing seat 415. The control rod 416 has a sliding ball (not shown in the figure), which is in the first slideway 414 in the default state, and the sliding ball is made of elastic material. A first switch (not shown in the figure) is arranged in the first slideway 414, and the first switch is used to control the start of the first cylinder 202 and the shutdown of the second cylinder 407. It should be noted that the first cylinder 202 can also be controlled by an external switch to facilitate the initial installation of the power battery shell; A second slideway 417 is connected to the first slideway 414, and the bottom of the second slideway 417 is lower than the bottom of the first slideway 414, so that after the control ball slides from the first slideway 414 into the second slideway 417, it cannot return from the second slideway 417 to the first slideway 414; A third slide 419 is connected to the second slide 417. The bottom of the third slide 419 is lower than the bottom of the second slide 417. A first step (not shown in the figure) is provided between the third slide 419 and the second slide 417. Therefore, after the control ball slides from the second slide 417 into the third slide 419, it cannot return from the third slide 419 to the second slide 417. A first vertex 418 is provided at the connection between the third slide 419 and the second slide 417. The first vertex 418 is located in the third slide 419. A second switch is provided at the first vertex 418, and the second switch is used to control the start of the second cylinder 407 and the flip motor 425; In the initial state, the rack 408 is driven by the second cylinder 407 to be close to the gear 404, and the top surface of the support platform 428 supports the power battery shell so that the power battery shell is in the first detection position. At this time, the telescopic end of the hydraulic cylinder 302 pushes the lower pressure plate 303 to gradually approach the power battery shell and perform a pressure resistance test on it. After the test is completed, the hydraulic cylinder 302 can be reset; When the power battery shell needs to be turned over, the third cylinder 411 is activated to push the base plate 401 upward, thereby driving the clamped power battery shell to move upward. At this time, the control ball synchronously slides from the first slide 414 into the second slide 417; As the base plate 401 moves upward, the gear 404 gradually approaches the meshing tooth 409 and meshes with it, so as to drive the clamped power battery shell to flip, and when the gear 404 completely passes over the meshing tooth 409, the power battery shell completes a 90-degree flip to realize the flipping operation of the power battery shell. At this time, the third cylinder 411 reaches the limit position, and the control ball is synchronously held at the first vertex 418; At this time, the control ball presses the second switch, and the second cylinder 407 drives the rack 408 away from the gear 404, and at the same time the flip motor 425 is started to drive the support platform 428 to rotate 180 degrees, so that the bottom surface of the support platform 428 faces upward to support the second detection position of the power battery shell; Continue to refer Figure 6-Figure 8 The third slide 419 is connected to the first slide 414, and a transition slope (not shown in the figure) is arranged at the connection between the third slide 419 and the first slide 414. The transition slope gradually increases along the position close to the first slide 414, and the highest position of the transition slope is higher than the position of the groove bottom of the first slide 414 and forms a second step. The second step is used to limit the initial movement of the control ball, so that the control ball can only move from the first slide 414 to the second slide 417 when it moves initially; A slide groove 420 is provided on the transition slope, and a protruding block 421 is slidably mounted on the slide groove 420, and a first spring 422 is connected between the protruding block 421 and one end of the inner wall of the slide groove 420, and the first spring 422 is used to initially limit the position of the protruding block 421 in the slide groove 420, and a third switch is fixedly mounted at the lower side end of the protruding block 421, and the third switch is used to control the closing of the first cylinder 202; When the power battery shell needs to be turned over, the third cylinder 411 is activated to push the base plate 401 upward, thereby driving the clamped power battery shell to move upward. At this time, the control ball synchronously slides from the first slide 414 into the second slide 417; As the base plate 401 moves upward, the gear 404 gradually approaches the meshing tooth 409 and meshes with it, so as to drive the clamped power battery shell to flip, and when the gear 404 completely passes over the meshing tooth 409, the power battery shell completes a 90-degree flip to realize the flipping operation of the power battery shell. At this time, the third cylinder 411 reaches the limit position, and the control ball is synchronously held at the first vertex 418; At this time, the control ball presses the second switch, and the second cylinder 407 drives the rack 408 away from the gear 404, and at the same time the flip motor 425 is started to drive the support platform 428 to rotate 180 degrees, so that the bottom surface of the support platform 428 faces upward to support the second detection position of the power battery shell; At this time, the third cylinder 411 completes the extension movement and resets to drive the base plate 401 to move downward synchronously, thereby causing the flipped power battery shell to move downward. At this time, the control ball synchronously slides from the first vertex 418 to the third slideway 419, contacts the protruding block 421 and presses the third switch to start the first cylinder 202 and drive the clamping rod 203 to move a certain distance away from the power battery shell. At this time, the power battery shell falls on the support platform 428 by its own gravity. It should be noted that when the control ball contacts the protruding block 421, the distance between the power battery shell and the support platform 428 is relatively close, so that even if the power battery shell falls on the support platform 428, it will not affect the power battery shell. At the same time, the base plate 401 gradually resets to the initial state, and the control ball is controlled to move to the third slideway 419. The ball pushes the protruding block 421 to squeeze the first spring 422, and when the protruding block 421 slides to one end of the slide groove 420 close to the first slideway 414, the top surface of the protruding block 421 is flush with the transition slope. At this time, the control ball passes over the protruding block 421 and returns to the first slideway 414, and at the same time presses the first switch to start the first cylinder 202 to drive the clamping rod 203 to clamp the flipped power battery shell, and at the same time start the second cylinder 407 to drive the rack 408 close to the gear 404, and then restore the initial state, so that the distance between the lower pressure plate 303 and the power battery shell is always consistent, and the squeezing force of the lower pressure plate 303 on the power battery shell is guaranteed to be consistent, so as to avoid the separation of the power battery shell and the clamp, thereby ensuring the relative stability of the position of the strain gauge; At the same time, by testing the pressure resistance of both sides of the power battery shell, we can fully understand the pressure resistance of the battery shell in different force directions and positions. Because the battery shell may be subjected to pressure from all directions during actual use. For example, in the stacking structure of the battery pack, the upper and lower surfaces and sides of the battery shell may be subjected to pressure from adjacent batteries or external devices. Testing the surface and sides of the battery shell can more accurately evaluate its pressure resistance performance under complex actual working conditions.

[0023] Embodiment 3: In the above embodiment of the battery shell pressure resistance performance, the second rotating shaft 426 is used as a supporting carrier of the lower pressing plate 303, which results in uneven force distribution when bearing the pressure transmitted by the lower pressing plate 303, thereby lacking stability in the process of applying pressure to the power battery shell; In order to solve the above problems, Figure 1 and Figure 3 As shown, a stabilizing mechanism 5 is installed on the bottom surface of the workbench 101, and the stabilizing mechanism 5 is used to provide support for the support table 428, and the stabilizing mechanism 5 includes two sets of fixing plates 501 fixedly installed on the bottom surface of the workbench 101, and the fixing plates 501 have a storage slot 502, and a third spring 503 is fixedly installed inside the storage slot 502, and an insert block 504 is fixedly installed at one end of the third spring 503. It should be noted that a part of the insert block 504 is inside the storage slot 502, and the remaining part of the insert block 504 extends out of the storage slot 502; Meanwhile, support blocks 505 are fixedly installed on both sides of the support platform 428, and a slot (not shown in the figure) is provided on one side of the support block 505 close to the insert block 504, and a first electromagnet (not shown in the figure) is fixedly installed on one side of the insert block 504 close to the slot, and a second electromagnet is fixedly installed inside the slot. In the initial state, the first electromagnet and the second electromagnet are both in a power-off state; Therefore, before applying pressure to the power battery shell, the first electromagnet and the second electromagnet are energized. At this time, since the second electromagnet is fixed, the first electromagnet is attracted to and adsorbed on the second electromagnet by the magnetic force. At this time, the third spring 503 is stretched, and the insert block 504 supports the support block 505 to provide support force for the power battery shell, thereby avoiding the force directly impacting the first rotating shaft 403 without any buffer, thereby protecting the first rotating shaft 403 and ensuring that it will not be damaged due to sudden excessive direct pressure, thereby ensuring the stability and reliability of the entire device during the process of applying pressure to the power battery shell.

[0024] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power battery shell pressure resistance performance testing device, characterized in that: include: A testing device (1), the testing device (1) comprising a workbench (101); A clamping mechanism (2), the clamping mechanism (2) being mounted on the workbench (101), the clamping mechanism (2) comprising a clamping rod (203) for clamping the power battery shell, a first cylinder (202) for driving the clamping rod (203) to move, and a placement seat (201) for supporting the first cylinder (202); A pressing mechanism (3), the pressing mechanism (3) being mounted on the workbench (101), the pressing mechanism (3) comprising a pressing plate (303) for pressing the power battery shell, and a hydraulic cylinder (302) for driving the pressing plate (303) to move; A turning mechanism (4), the turning mechanism (4) being installed on the workbench (101), the turning mechanism (4) comprising: Two sets of base plates (401), the base plates (401) being placed on the workbench (101), and two sets of first bearing seats (402) being mounted on the base plates (401); A first rotating shaft (403), the first rotating shaft (403) being mounted on the placement seat (201); Two groups of mounting members (405), the mounting members (405) being mounted on the pressing mechanism (3), the mounting members (405) being mounted with a slide plate (406), the slide plate (406) having a sliding groove opening downward; a rack (408), the rack (408) being slidably mounted in the sliding groove, the rack (408) being composed of meshing teeth (409) and a smooth section (410), and a gear (404) being mounted on the first rotating shaft (403); Two sets of third cylinders (411), the third cylinders (411) being installed inside the testing device (1), and the telescopic ends of the third cylinders (411) being movably inserted through the workbench (101) and in contact with the bottom surface of the base plate (401); A second cylinder (407) is installed on the pressing mechanism (3), and a telescopic end of the second cylinder (407) movably passes through the slide plate (406) and is connected to the rack (408).

2. A power battery shell pressure resistance performance testing device according to claim 1, characterized in that: The workbench (101) is provided with a through slot (102), a flip motor (425) is installed on the bottom surface of the workbench (101), a second rotating shaft (426) is installed at the output end of the flip motor (425), and a support platform (428) is sleeved on the second rotating shaft (426); The support platform (428) is located in the through groove (102); a second bearing seat (427) is mounted on the workbench (101); and the other end of the second rotating shaft (426) is rotatably connected to the second bearing seat (427).

3. A power battery shell pressure resistance performance testing device according to claim 2, characterized in that: The initial state of the power battery case is defined as the first detection position, and the flipped power battery case is defined as the second detection position.

4. A power battery shell pressure resistance performance testing device according to claim 3, characterized in that: A control panel (413) is mounted on the base plate (401); a limiting column (423) is mounted on the bottom of the control panel (413); the limiting column (423) passes through the base plate (401) and is slidably connected to the base plate (401); a second spring (424) is mounted between the control panel (413) and the base plate (401); the second spring (424) is sleeved on the limiting column (423).

5. A power battery shell pressure resistance performance testing device according to claim 4, characterized in that: The control panel (413) has a first slideway (414) opened vertically. Two sets of mounting back plates (412) are installed on the workbench (101). A fixing seat (415) is installed on the mounting back plates (412). A control rod (416) is hinged on the fixing seat (415). The control rod (416) has a sliding ball. The sliding ball is in the first slideway (414) in a default state. The sliding ball is made of elastic material. A first switch is arranged in the first slideway (414). The first switch controls the start of the first cylinder (202) and the shut down of the second cylinder (407). The first cylinder (202) can be controlled by an external switch.

6. A power battery shell pressure resistance performance testing device according to claim 5, characterized in that: The first slide (414) is connected to a second slide (417), the bottom of the second slide (417) is lower than the bottom of the first slide (414), the second slide (417) is connected to a third slide (419), the bottom of the third slide (419) is lower than the bottom of the second slide (417), a first step is provided between the third slide (419) and the second slide (417), a first vertex (418) is provided at the connection between the third slide (419) and the second slide (417), and the first vertex (418) is located in the third slide (419).

7. A power battery shell pressure resistance performance testing device according to claim 6, characterized in that: The first vertex (418) is provided with a second switch, and the second switch controls the start-up of the second cylinder (407) and the flip motor (425).

8. A power battery shell pressure resistance performance testing device according to claim 7, characterized in that: The third slide (419) is connected to the first slide (414), and a transition slope is provided at the connection point between the third slide (419) and the first slide (414). The transition slope gradually increases along a position close to the first slide (414), and the highest position of the transition slope is higher than the bottom position of the first slide (414) to form a second step.

9. A power battery shell pressure resistance performance testing device according to claim 8, characterized in that: A slide groove (420) is provided on the transition slope, a protruding block (421) is slidably mounted on the slide groove (420), a first spring (422) is connected between the protruding block (421) and one end of the inner wall of the slide groove (420), and a third switch is mounted at the lower end of the protruding block (421), the third switch controlling the closing of the first cylinder (202).

10. A power battery shell pressure resistance performance testing device according to claim 9, characterized in that: A stabilizing mechanism (5) is installed on the bottom surface of the workbench (101), and the stabilizing mechanism (5) comprises two sets of fixing plates (501) installed on the bottom surface of the workbench (101), and the fixing plates (501) have a storage slot (502), and a third spring (503) is installed inside the storage slot (502), and an insert block (504) is installed at one end of the third spring (503), and a partial area of ​​the insert block (504) is located inside the storage slot (502), and the remaining partial area of ​​the insert block (504) protrudes out of the storage slot (502); Support blocks (505) are installed on both sides of the support platform (428), a slot is provided on a side of the support block (505) close to the insert block (504), a first electromagnet is installed on a side of the insert block (504) close to the slot, and a second electromagnet is installed inside the slot.

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