Power battery pack voltage withstanding test device

Abstract

The utility model relates to a power battery pack withstand voltage test device which comprises a support, a detection box is installed on the upper layer of the support, a hydraulic cylinder is installed in the center of the top of the detection box, the bottom of the output end of the hydraulic cylinder penetrates through the top of the detection box and is fixedly connected with a pressure plate, and trigger devices are installed on the two sides of the pressure plate. A supporting plate is fixedly connected to the bottom of the inner wall of the detection box, a fixing rod is arranged at the position, corresponding to the triggering device, of the bottom of the inner wall of the detection box, and an emergency stop button is installed at the top of the fixing rod and connected with the hydraulic cylinder in series; after one of the scram buttons is triggered, the power supply of the hydraulic cylinder is cut off, so that the extrusion plate cannot continuously move downwards, the battery pack below the extrusion plate is prevented from being further damaged, and explosion accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing devices, in particular to a withstand voltage testing device for power battery packs. Background Technique

[0002] After the production of power battery packs, they need to undergo various inspections. One of the inspections is to test the withstand voltage performance of the power battery packs. During the inspection process, as the pressure gradually increases, the staff needs to observe the shape changes of the power battery packs during this process, such as whether there are bulges or air leaks, so as to confirm whether the power battery packs effectively protect the batteries inside.

[0003] For the existing withstand voltage performance testing devices for power battery packs, their working principle is to use a hydraulic rod. The power battery pack is placed below the output end of the hydraulic rod, and the output end of the hydraulic rod is extended to squeeze the power battery pack to test whether the outer shape of the power battery pack will change under the rated pressure. Currently, the withstand voltage tests are all carried out on an open workbench. If the quality of the power battery pack is unqualified, under the continuous pressure of the hydraulic press, the power battery pack will undergo serious deformation. If the work of the hydraulic press is not stopped in time, accidents such as battery explosion may occur during the inspection process. However, the current power detection devices do not have protective measures for the above situations and there are potential safety hazards. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a withstand voltage testing device for power battery packs to solve the problem of potential safety hazards existing in traditional testing devices.

[0005] A withstand voltage testing device for power battery packs of the utility model includes a bracket. A detection box is installed on the upper layer of the bracket. A hydraulic cylinder is installed in the center of the top of the detection box. The bottom of the output end of the hydraulic cylinder penetrates through the top of the detection box and is fixedly connected with a pressure plate. Trigger devices are installed on both sides of the pressure plate. A support plate is fixedly connected to the bottom of the inner wall of the detection box. Fixed rods are arranged at positions corresponding to the trigger devices at the bottom of the inner wall of the detection box. An emergency stop button is installed on the top of the fixed rod. The emergency stop button is connected in series with the hydraulic cylinder.

[0006] As a further improvement of the utility model, the trigger device includes a clamp. The front of the clamp is in a "C" - shaped structure. The clamp is fixedly connected to the side of the pressure plate. A fixed sleeve is fixedly connected to the center inside the clamp. A sliding rod is slidably connected vertically inside the fixed sleeve. An anti - slip ring is fixedly connected to the inner wall of the fixed sleeve. The surface of the sliding rod fits with the inner side of the anti - slip ring.

[0007] As a further improvement of the present invention, the top and bottom of the slide bar respectively penetrate the top and bottom of the clamp, and the bottom of the slide bar is fixedly connected with an extrusion block.

[0008] As a further improvement of the utility model, a clamping structure is provided at the top and bottom of the clamp and at both sides close to the center, and the clamping structure includes a fixed plate, the center of the fixed plate is slidably connected to a limiting rod in a horizontal direction, the side of the limiting rod close to the center of the sliding rod is fixedly connected to an extrusion plate, and the side of the extrusion plate away from the fixed plate is provided with an anti-slip pad.

[0009] As a further improvement of the utility model, a reset spring is fixedly connected to one side of the fixed plate close to the center of the slide rod, the other end of the reset spring is fixedly connected to one side of the extrusion plate, and the limit rod passes through the middle of the reset spring.

[0010] As a further improvement of the present invention, there are four trigger devices in total, and the four trigger devices are respectively installed near the four corners of the pressure plate.

[0011] As a further improvement of the utility model, a double door is hinged on the front of the detection box, and the double door is made of transparent tempered glass material.

[0012] As a further improvement of the present invention, a controller is installed in the middle layer of the bracket, a pressure sensor is arranged inside the support plate, and the controller is electrically connected to the pressure sensor and the hydraulic cylinder respectively.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model arranges a fixed rod and an emergency stop button in the detection box, and connects a plurality of emergency stop buttons in series with the hydraulic rod, so that when one of the emergency stop buttons is triggered, the power supply of the hydraulic cylinder will be disconnected, and the extrusion plate will not continue to move downward, preventing the battery pack under the extrusion plate from being further damaged, thereby avoiding an explosion accident.

[0015] 2. The utility model arranges the clamps, fixed sleeves, slide bars and extrusion blocks on both sides of the pressure plate, so that the position of the extrusion block can be adjusted by sliding the slide bar up and down, so that the distance between the extrusion block and the emergency stop button is adjustable and can be adjusted according to the height of the battery pack to adapt to the detection of battery packs of different models. The position of the slide bar after adjustment can be limited by the arranged fixed plate, limit rod, extrusion plate and return spring to ensure that the slide bar remains in the preset position, thereby ensuring that the extrusion block can contact the emergency stop button as soon as the battery pack is crushed, thereby ensuring the safety during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the trigger device of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection relationship between the fixed sleeve and the sliding rod of the utility model.

[0021] In the figure: 1. bracket; 2. detection box; 3. hydraulic cylinder; 4. pressure plate; 5. support plate; 6. controller; 7. double door; 8. clamp; 9. fixed sleeve; 901, anti-slip ring; 10. slide bar; 11. extrusion block; 12. fixed plate; 13. limit rod; 14. extrusion plate; 15. reset spring; 16. fixed rod; 17. emergency stop button. DETAILED DESCRIPTION

[0022] The following will disclose multiple embodiments of the utility model with diagrams. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the utility model. In other words, in some embodiments of the utility model, these physical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0023] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this technology, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0025] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. 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 scope of protection required by the present utility model.

[0026] Please refer to Figure 1-4 , a pressure resistance testing device for a power battery pack of the present utility model, comprising a bracket 1. A detection box 2 is installed on the upper layer of the bracket 1. A hydraulic cylinder 3 is installed at the center of the top of the detection box 2. The bottom of the output end of the hydraulic cylinder 3 penetrates through the top of the detection box 2 and is fixedly connected to a pressure plate 4. Trigger devices are installed on both sides of the pressure plate 4. There are a total of four trigger devices, and the four trigger devices are respectively installed at positions near the four corners of the pressure plate 4. A support plate 5 is fixedly connected to the bottom of the inner wall of the detection box 2. Fixing rods 16 are arranged at positions corresponding to the trigger devices on the bottom of the inner wall of the detection box 2. An emergency stop button 17 is installed at the top of the fixing rod 16. The emergency stop button 17 is connected in series with the hydraulic cylinder 3.

[0027] In this embodiment, the trigger device includes a fixture 8. The front of the fixture 8 is in a "C" - shaped structure. The fixture 8 is fixedly connected to the side of the pressure plate 4. A fixed sleeve 9 is fixedly connected to the center inside the fixture 8. A sliding rod 10 is slidably connected in the fixed sleeve 9 in the vertical direction. An anti - slip ring 901 is fixedly connected to the inner wall of the fixed sleeve 9. The surface of the sliding rod 10 is in contact with the inner side of the anti - slip ring 901. The top and bottom of the sliding rod 10 respectively penetrate through the top and bottom of the fixture 8. An extrusion block 11 is fixedly connected to the bottom of the sliding rod 10.

[0028] Before the device is used, it needs to be debugged. The specific steps are as follows:

[0029] First, the staff places the battery pack to be detected on the support plate 5, and then controls the output end of the hydraulic cylinder 3 to extend downward until the bottom of the pressure plate 4 just fits the top of the battery pack, and then stops the hydraulic cylinder 3. After that, push the sliding rod 10 downward to adjust the distance between the extrusion plate 14 and the emergency stop button 17 so that the extrusion plate 14 stays above the emergency stop button 17. This distance should be set to the maximum deformation amount allowed by the battery pack. Once the battery pack exceeds the maximum deformation amount, the extrusion plate 14 will contact the emergency stop button 17, thereby closing the hydraulic cylinder 3, avoiding further damage to the battery pack caused by the continuous downward pressure of the output end of the hydraulic cylinder 3, and preventing safety accidents. On the contrary, if the battery pack does not show obvious deformation after being pressed by the hydraulic cylinder 3 for a period of time, it proves that the quality of the battery pack is qualified.

[0030] In this embodiment, in order to ensure the stability of the sliding rod 10, a clamping structure is provided at the top and bottom of the clamp 8 and at both sides near the center. The clamping structure includes a fixed plate 12, and the center of the fixed plate 12 is slidably connected to a limiting rod 13 in a horizontal direction. The limiting rod 13 is fixedly connected to a squeezing plate 14 on one side close to the center of the sliding rod 10, and an anti-slip pad is provided on the side of the squeezing plate 14 away from the fixed plate 12. A reset spring 15 is fixedly connected to one side of the fixed plate 12 close to the center of the sliding rod 10, and the other end of the reset spring 15 is fixedly connected to one side of the squeezing plate 14, and the limiting rod 13 passes through the middle of the reset spring 15.

[0031] Through the above technical solution, under the action of the rebound force of the reset spring 15, the anti-skid pad on the extrusion plate 14 always fits on the surface of the slide bar 10, and the position of the slide bar 10 is limited by friction to keep it stable.

[0032] In this embodiment, a double door 7 is hinged on the front of the detection box 2. The double door 7 is made of transparent tempered glass. The double door 7 makes it convenient for staff to observe the situation inside the detection box 2 from the outside, further improving the safety of the device.

[0033] In this embodiment, a controller 6 is installed in the middle layer of the bracket 1, and a pressure sensor is arranged inside the support plate 5. The controller 6 is electrically connected to the pressure sensor and the hydraulic cylinder 3 respectively. The setting of the pressure sensor can detect the pressure applied by the hydraulic cylinder 3.

[0034] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A power battery pack withstand voltage test device, comprising a bracket (1), characterized in that: The upper layer of the bracket (1) is equipped with a detection box (2). In the center of the top of the detection box (2), a hydraulic cylinder (3) is installed. The bottom of the output end of the hydraulic cylinder (3) penetrates through the top of the detection box (2) and is fixedly connected to a pressure plate (4). Trigger devices are installed on both sides of the pressure plate (4). A support plate (5) is fixedly connected to the bottom of the inner wall of the detection box (2). At a position corresponding to the trigger device on the bottom of the inner wall of the detection box (2), a fixed rod (16) is provided. An emergency stop button (17) is installed on the top of the fixed rod (16). The emergency stop button (17) is connected in series with the hydraulic cylinder (3).

2. A power battery pack withstand voltage test device according to claim 1, characterized in that: The trigger device includes a clamp (8). The front of the clamp (8) is in a "C" shape. The clamp (8) is fixedly connected to the side of the pressure plate (4). A fixed sleeve (9) is fixedly connected to the center of the inside of the clamp (8). A sliding rod (10) is slidably connected in the fixed sleeve (9) in the vertical direction. An anti-slip ring (901) is fixedly connected to the inner wall of the fixed sleeve (9). The surface of the sliding rod (10) fits against the inner side of the anti-slip ring (901).

3. A power battery pack withstand voltage test device according to claim 2, characterized in that: The top and bottom of the sliding rod (10) penetrate through the top and bottom of the clamp (8) respectively. An extrusion block (11) is fixedly connected to the bottom of the sliding rod (10).

4. A power battery pack withstand voltage test device according to claim 2, characterized in that: Pressing structures are provided at both sides of the top and bottom of the clamp (8) near the center. The pressing structure includes a fixing plate (12). A limiting rod (13) is slidably connected in the center of the fixing plate (12) in the horizontal direction. An extrusion plate (14) is fixedly connected to the side of the limiting rod (13) close to the center of the sliding rod (10). An anti-slip pad is provided on the side of the extrusion plate (14) away from the fixing plate (12).

5. A power battery pack withstand voltage test device according to claim 4, characterized in that: A return spring (15) is fixedly connected to the side of the fixing plate (12) close to the center of the sliding rod (10). The other end of the return spring (15) is fixedly connected to one side of the extrusion plate (14). The limiting rod (13) passes through the middle of the return spring (15).

6. A power battery pack withstand voltage test device according to claim 2, characterized in that: There are a total of four trigger devices, and the four trigger devices are respectively installed at positions near the four corners of the pressure plate (4).

7. A power battery pack withstand voltage test device according to claim 6, characterized in that: A double-door (7) is hinged to the front of the detection box (2). The double-door (7) is made of transparent tempered glass material.

8. A power battery pack withstand voltage test device according to claim 1, characterized in that: A controller (6) is installed in the middle layer of the bracket (1). A pressure sensor is provided inside the support plate (5). The controller (6) is electrically connected to the pressure sensor and the hydraulic cylinder (3) respectively.

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