Battery pack body airtightness test compression device

Abstract

The utility model relates to battery production technical field, specifically disclose a kind of battery package body airtight test compression device, including support frame, compression mechanism and pressing plate, the support frame is installed on working ground by stand, the space of the middle part and lower part of support frame is reserved for battery gas bag, the compression mechanism is installed in the upper portion of support frame, the guiding assembly and drive arrangement are equipped in the compression mechanism, the working end of drive arrangement is connected with pressing plate transmission, the guiding assembly is installed in one side of drive arrangement, the guiding assembly is connected with pressing plate linear sliding. The device can detect the tiny leakage of battery package body, and detection speed is fast, can improve the airtight test efficiency of battery gas bag.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a battery pack airtightness testing and clamping device. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, aluminum-cased batteries have been widely used due to their advantages such as high strength, good heat dissipation, high energy density, and ease of processing and molding. Battery pack airtightness testing is a crucial step in the battery module production process, and the methods currently used mainly include pressure decay method, differential pressure method, bubble leak detection method, and helium mass spectrometry leak detector method.

[0003] The pressure decay method is the most commonly used approach. After sealing the solar panel casing, it is filled with dry air or inert gas at a certain pressure. Then, the air supply is cut off, and the change in internal pressure is observed over a period of time. If there is a leak in the solar panel, the compressed air inside will leak out through the leak, causing the internal pressure to gradually decrease. The detector monitors the pressure change in real time and calculates the rate of pressure decrease using an internal algorithm. Based on the rate of pressure change, the leakage rate can be calculated.

[0004] The pressure decay method currently has the following problems:

[0005] The volume of the battery pack being tested also affects the test results. With a larger volume, even if a leak exists, the pressure change is relatively slow, requiring a longer testing time to obtain accurate results. Detection sensitivity is limited; when the leakage rate is very small, the pressure change may be extremely slow and insignificant, making accurate detection and quantification difficult, easily leading to missed detections. The testing time is also long; to ensure the accuracy of the test results, especially for detecting minute leaks, a longer testing time is usually required to observe pressure changes. These issues may affect production efficiency and make it unsuitable for applications requiring high testing speed. Utility Model Content

[0006] The purpose of this invention is to provide a battery pack airtightness testing and clamping device to solve the problems encountered in the background art.

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

[0008] A battery pack airtightness testing clamping device includes a support frame, a clamping mechanism, and a pressure plate. The support frame is installed on the working ground via a column. Space is reserved in the middle and lower part of the support frame for the battery pack to pass through. The clamping mechanism is installed on the upper part of the support frame. The clamping mechanism is provided with a guide component and a driving device. The working end of the driving device is connected to the pressure plate for transmission. The guide component is installed on one side of the driving device and is linearly slidably connected to the pressure plate.

[0009] In the above scheme, at least one set of clamping mechanisms is provided, each set including one guide component and one drive device, and each pressure plate is configured with one set of clamping mechanisms. The clamping mechanism also includes a mounting plate, with the guide component and drive device mounted on top of the mounting plate; a fixing plate connected to the mounting plate is mounted on top of the support frame.

[0010] In the above scheme, the support frame includes a welded frame and columns. The top of the columns is fixed to the bottom of the four ends of the welded frame, and the bottom of the columns is fixed with foot pads. A fall arrestor is provided on the inner side of the top of the columns, and a protective component is installed on the outer wall of the columns via hooks. The protective component can be inserted into the fall arrestor during operation.

[0011] In the above scheme, the guide assembly includes a guide shaft and a connecting plate. There are two guide shafts, and their tops are connected together by the connecting plate. The middle part of the guide shaft is slidably connected to the mounting plate by a linear bearing, and the bottom of the guide shaft is fixedly connected to the pressure plate by a support.

[0012] In the above scheme, the driving device is any one of a pneumatic cylinder, an oil cylinder, or a hydraulic cylinder. The base of the driving device is mounted on the mounting plate, and the telescopic working end of the driving device is connected to the pressure plate through a floating joint seat.

[0013] Compared with existing technologies, the advantages of this invention are: This airtightness testing and clamping device is used for airtightness testing in battery gas packs, mainly by compressing the battery gas pack by applying overall downward pressure. It can detect minute leaks and has a fast detection speed, thus improving the airtightness testing efficiency of battery gas packs. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the support frame in this utility model;

[0017] Figure 3 This is a schematic diagram of the clamping mechanism in this utility model;

[0018] Figure 4 for Figure 3 A structural diagram from another perspective;

[0019] Figure 5 This is a schematic diagram of the structure of this utility model after removing the two sets of clamping mechanisms;

[0020] Figure 6 for Figure 5 A structural diagram from another perspective.

[0021] Numbering in the diagram: 1-Support frame; 11-Welded frame; 12-Fixing plate; 13-Column; 14-Hook; 15-Protective component; 16-Fall-proof limit seat; 17-Foot pad; 18-Manual valve; 19-Silencer; 2-Pressure mechanism; 21-Guide assembly; 211-Linear bearing; 212-Guide shaft; 213-Connecting plate; 214-Buffer; 215-Support; 22-Drive device; 221-Floating joint seat; 222-Speed ​​control valve; 223-Induction check valve; 224-Limit block; 225-Floating joint; 23-Mounting plate; 231-First stiffener; 3-Pressure plate; 31-Backing plate; 32-Second stiffener. Detailed Implementation

[0022] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0023] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0024] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Example 1, as Figure 1 and Figure 3 As shown, a battery pack airtightness testing clamping device includes a support frame 1, a clamping mechanism 2, and a pressure plate 3. The support frame 1 is installed on the working ground via a column 13. The middle and lower parts of the support frame 1 are reserved with space for the battery pack to pass through. During the airtightness test, the battery pack is loaded by an AGV automatic trolley and then passes through the lower cavity of the support frame 1, where it stays to undergo the airtightness test.

[0026] The clamping mechanism 2 is installed on the upper part of the support frame 1. The clamping mechanism 2 includes a guide assembly 21 and a drive device 22. The working end of the drive device 22 is connected to the pressure plate 3. By driving the pressure plate 3 to press down, the battery pack located in the lower cavity of the support frame 1 is clamped, thereby smoothly pressurizing the gas inside the battery pack. Any leakage will be directly detected. The guide assembly 21 is installed on one side of the drive device 22 and is linearly slidably connected to the pressure plate 3, providing guidance for the smooth downward pressing of the drive device 22.

[0027] During implementation, the pressing mechanism 2 is provided with at least one set, each set including a guide component 21 and a drive device 22. The guide component 21 works with the drive device 22 to stably drive the pressure plate 3, so that it is pressed down smoothly, and then lifted up after the airtightness test is completed.

[0028] In Example 2, based on the scheme of Example 1, the clamping mechanism 2 is further provided with a mounting plate 23, and the guide assembly 21 and the drive device 22 are both installed on the top of the mounting plate 23. A fixing plate 12 connected to the mounting plate 23 is installed on the top of the support frame 1 for stabilizing and fixing the clamping mechanism 2 with screws.

[0029] Each pressure plate 3 is equipped with a set of clamping mechanisms 2. Since multiple clamping mechanisms 2 correspond to multiple pressure plates 3, they can be centrally fixed using a backing plate 31 for concentrated and stable downward pressure, facilitating overall downward pressure. The guide assembly 21 and drive device 22 can be installed according to the length and width dimensions of the battery pack. Please refer to [reference needed]. Figure 3 The design incorporates four sets of clamping mechanisms 2, while Figure 5 , Figure 6 Only two sets of clamping mechanisms were installed in the middle.

[0030] Example 3, based on the solution of Example 1, please refer to... Figure 3 The support frame 1 includes a welded frame 11 and uprights 13. The top of the uprights 13 is welded and fixed to the bottom of the four ends of the welded frame 11. The bottom of the uprights 13 is fixed with foot pads 17, which are fixed to the working ground by expansion bolts. The main structure of the support frame 1 is made of Q235A carbon steel, which has sufficient strength and rigidity to ensure that no deformation or shaking occurs during the pressing process, thereby ensuring the accuracy and reliability of the test results.

[0031] As a preferred option, please refer to Figure 2 A fall arrestor 16 is provided on the inner side of the top of the column 13. A protective element 15 is installed on the outer wall of the column 13 via a hook 14. When in operation, the protective element 15 can be inserted into the fall arrestor 16, facing the direction of the clamping mechanism 2, to limit the movement and prevent the pressure plate 3 from falling due to loose screws. The protective element 15 is a pin, and by equipping it with the protective element 15, operators are prevented from being injured during the operation of the device.

[0032] As a preferred embodiment, a manual valve 18 connected to the drive device 22 is provided on one side of the top of the welding frame 11. A silencer 19 is installed on the control circuit between the manual valve 18 and the drive device 22 for noise reduction. The manual valve 18 controls the lifting and lowering action of the drive device 22, and the limit block 224 controls the stroke of the drive device 22, facilitating operation and adjustment by personnel.

[0033] Example 4, based on the solution of Example 1, please refer to... Figure 3 and Figure 4 The guide assembly 21 includes a guide shaft 212 and a connecting plate 213. Two guide shafts 212 are provided, and their tops are connected together via the connecting plate 213. The guide shafts 212 guide the pressure plate 3 to maintain the correct direction of movement during downward pressing, preventing deviation or tilting. The middle part of the guide shaft 212 is slidably connected to the mounting plate 23 via a linear bearing 211, and the bottom of the guide shaft 212 is fixedly connected to the pressure plate 3 via a support 215. A limit block 224 is installed on the mounting plate 23, located directly below the bottom of the connecting plate 213. The limit block 224 automatically stops after the drive device 22 reaches its stroke. A buffer 214, a common damping buffer, is installed in the middle of the connecting plate 213.

[0034] Example 5, based on the solution of Example 1, please refer to... Figure 3 and Figure 4 The drive device 22 can be any one of a pneumatic cylinder, an oil cylinder, or a hydraulic cylinder, with a pneumatic cylinder being preferred. Whether using a set of clamping mechanisms 2 or the design described herein... Figure 1 The four sets of cylinders are connected to the plant's power and air supply, and are all controlled by a PLC for start / stop. The base of the drive unit 22 is mounted on the mounting plate 23, and the telescopic working end of the drive unit 22 is connected to the pressure plate 3 via a floating joint seat 221. As a preferred embodiment, a floating joint 225 is installed in the floating joint seat 221 to facilitate more flexible conveying, overcome certain angular deviations, and provide self-aligning. A speed control valve 222 and an induced check valve 223 are externally mounted on the drive unit 22 and connected to its control line.

[0035] In implementation, one end of the silencer 19 is connected to the manual valve 18, and the other end is connected to the speed control valve 222 and the induced check valve 223. The manual valve 222 controls the cylinder's lifting and lowering. The silencer 19 reduces noise generated by gas flow and prevents dust from entering the valve body. The speed control valve 222 controls the cylinder's lifting and lowering speed, and the induced check valve 223 prevents the cylinder from suddenly dropping due to accidental gas interruption. These control valves are controlled by compressed gas and can be operated manually.

[0036] In addition, based on the solutions of embodiments 1-5, in implementation, a first stiffener 231 can be provided on the outer periphery of the mounting plate 23, and a second stiffener 32 can be provided on the outer periphery and inner side of the back plate 31, avoiding the working end connection of the drive device 22. The overall strength of the plate is improved by providing stiffeners.

[0037] This airtightness testing and clamping device is used for airtightness testing in battery gas packs. It primarily works by compressing the entire battery gas pack under pressure. It can detect minute leaks quickly, improving the efficiency of airtightness testing for battery gas packs.

[0038] The entire device is quick and easy to install, without complex circuitry. When the drive unit 22 uses a cylinder, only compressed air needs to be connected after all components are installed for testing and operation. When testing the airtightness of large battery packs, the large volume of the battery pack leads to longer inflation time and slower internal pressure changes. Even if a leak exists, it may take a long time to detect. This device limits the deformation of the battery pack, allowing the internal pressure to rise rapidly, making it easier to identify leaks and reducing testing time. The device has a clear and straightforward structural design, and all components are common or easy to manufacture, simplifying maintenance and making it easy for on-site personnel to operate.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. These undisclosed elements are all prior art known to those skilled in the art.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A battery pack airtightness testing and clamping device, characterized in that: The device includes a support frame (1), a pressing mechanism (2), and a pressure plate (3). The support frame (1) is installed on the working ground by a column (13). The middle and lower parts of the support frame (1) are reserved for the passage of the battery gas pack. The pressing mechanism (2) is installed on the upper part of the support frame (1). The pressing mechanism (2) is provided with a guide component (21) and a drive device (22). The working end of the drive device (22) is connected to the pressure plate (3) for transmission. The guide component (21) is installed on one side of the drive device (22). The guide component (21) is linearly slidably connected to the pressure plate (3).

2. The battery pack airtightness testing and clamping device according to claim 1, characterized in that: The clamping mechanism (2) is provided in at least one set, each set including one of the guide components (21) and one of the drive devices (22); each of the pressure plates (3) is configured with one set of the clamping mechanism (2).

3. The battery pack airtightness testing and clamping device according to claim 2, characterized in that: The clamping mechanism (2) is also provided with a mounting plate (23), and the guide assembly (21) and the drive device (22) are both installed on the top of the mounting plate (23); the top of the support frame (1) is provided with a fixing plate (12) connected to the mounting plate (23).

4. The battery pack airtightness testing and clamping device according to claim 3, characterized in that: The support frame (1) includes a welded frame (11) and a column (13). The top of the column (13) is fixed to the bottom of the four ends of the welded frame (11), and the bottom of the column (13) is fixed with a foot pad (17).

5. The battery pack airtightness testing and clamping device according to claim 4, characterized in that: The top inner side of the column (13) is provided with a fall protection limit seat (16), and a protective component (15) is installed on the outer wall of the column (13) by means of a hook (14). The protective component (15) can be inserted into the fall protection limit seat (16) when working.

6. The battery pack airtightness testing and clamping device according to claim 4, characterized in that: The top side of the welding frame (11) is provided with a manual valve (18) connected to the drive device (22), and a silencer (19) is installed on the control line of the manual valve (18) and the drive device (22).

7. The battery pack airtightness testing and clamping device according to claim 3, characterized in that: The guide assembly (21) includes a guide shaft (212) and a connecting plate (213). There are two guide shafts (212), and their tops are connected together by the connecting plate (213). The middle part of the guide shaft (212) is slidably connected to the mounting plate (23) by a linear bearing (211), and the bottom of the guide shaft (212) is fixedly connected to the pressure plate (3) by a support (215).

8. The battery pack airtightness testing and clamping device according to claim 7, characterized in that: A limit block (224) is installed on the mounting plate (23). The limit block (224) is located directly below the bottom of the connecting plate (213). A buffer (214) is installed in the middle of the connecting plate (213).

9. The battery pack airtightness testing and clamping device according to claim 1, characterized in that: The drive device (22) is any one of a pneumatic cylinder, an oil cylinder, or a hydraulic cylinder. The base of the drive device (22) is mounted on the mounting plate (23). The telescopic working end of the drive device (22) is connected to the pressure plate (3) through a floating joint seat (221).

10. A battery pack airtightness testing and clamping device according to claim 9, characterized in that: A floating joint (225) is installed in the floating joint seat (221), and a speed regulating valve (222) and an induced check valve (223) connected to the control line of the driving device (22) are installed on the outside of the driving device (22).

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