Battery bipolar plate sealing testing machine

Abstract

The utility model belongs to the technical field of battery bipolar plate sealing tests, and discloses a battery bipolar plate sealing tester, which comprises a host device for testing the sealing of a battery bipolar plate in a pressurizing manner, and an isolating device arranged in the middle of the host device and used for moving up and down to separate stations, a downward pressing device used for moving transposition and applying force for downward pressing is installed at the top in the main machine device. The main machine device comprises a main machine body, a test box is arranged on the main machine body, a limiting sliding groove is formed in the middle of the test box, and two mold assemblies used for fixing a battery bipolar plate for a sealing test are symmetrically arranged in the test box. The isolation device comprises a lifting partition plate, two linear motors are symmetrically installed at the bottom of the lifting partition plate, and linear guide rails are arranged in the linear motors. According to the sealing testing machine for the battery bipolar plate, double-station alternate testing is realized through the two symmetrically arranged mold assemblies and the movable pressing device, and the sealing detection efficiency of the battery bipolar plate is greatly improved while the testing safety is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of battery bipolar plate sealing test technology, and in particular relates to a battery bipolar plate sealing test machine. Background Technology

[0002] As a core component of fuel cells and lithium battery systems, the sealing performance of bipolar plates directly affects the safety and lifespan of the battery stack. Sealing tests simulate pressure changes under actual operating conditions to detect micro-leakage at the interface between the bipolar plate and the seal, verifying the reliability of the design structure. During the test, the ambient temperature must be strictly controlled at 20±2℃ and the humidity below 60%RH to eliminate the influence of environmental variables on the test results. The bipolar plate sample must undergo three complete pressurization-holding-depressurization cycles, with a 2-hour interval between each cycle to ensure stress release. The testing focuses on stress concentration areas such as flow channel interfaces, bolt hole perimeters, and sealing grooves, using infrared thermal imaging to assist in locating micro-leakage points. Modern sealing tests have achieved automated data acquisition, using pressure sensors to monitor pressure curve fluctuations in real time and combining AI algorithms to automatically identify abnormal fluctuation patterns. The test results are used to generate a three-dimensional leakage distribution map, providing a quantitative basis for subsequent structural optimization.

[0003] Compared with Chinese Patent No. CN222013427U, a hydrogen fuel cell bipolar plate sealing test device is disclosed, aiming to solve the problem in existing test equipment where the lower template cannot be moved, requiring workers to install the electrode plates on the lower template, which is time-consuming and labor-intensive. The lower template is slidably connected to the test bench via a guide rail. A groove adapted to the guide rail is formed on the facing surface of the lower template and the guide rail. The test bench is also equipped with a limiting component for the lower template. A protective component for the gas pipe is also provided on the lower template. The guide rail on the test bench and the groove on the lower template allow the lower template to slide on the guide rail. When loading the electrode plates, the lower template is moved towards the edge of the test bench, facilitating the loading operation of the electrode plates, ensuring installation accuracy, and reducing the labor intensity of the workers.

[0004] However, the aforementioned patent requires stopping the machine to remove and place the bipolar plate after completing one battery bipolar plate sealing test before another battery bipolar plate sealing test can be performed, which greatly reduces the efficiency of battery bipolar plate sealing tests. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of this invention is to provide a battery bipolar plate sealing test machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery bipolar plate sealing test machine includes a main unit for pressurizing and testing the sealing of battery bipolar plates, and an isolation device in the middle of the main unit for vertically moving and separating workstations. A pressing device is installed at the top of the main unit for moving, repositioning, and applying downward pressure. The main unit includes a main body with a test chamber mounted on it. A limit groove is provided in the middle of the test chamber. Two mold assemblies for fixing the battery bipolar plate sealing test are symmetrically arranged inside the test chamber. The mold assemblies are connected to the main body via connecting pipes. Two chassis doors are symmetrically installed on the front of the test chamber. The isolation device includes a lifting partition with two linear motors symmetrically mounted at the bottom. Linear guide rails are installed inside the linear motors. The pressing device includes a translation component for reciprocating movement. Two telescopic cylinders are symmetrically mounted on the translation component, and a pressing plate is installed between the telescopic ends of the telescopic cylinders.

[0008] Furthermore: the mold assembly includes a lower mold plate and an upper mold plate, and a sealing gasket is pasted on the inner surface of the upper mold plate.

[0009] Furthermore, each of the chassis doors has a viewing window in the middle, and the outer ends of the two chassis doors are respectively hinged to the main body.

[0010] Furthermore, the top of the lifting partition is provided with an avoidance groove, and the thickness of the lifting partition is greater than the thickness of the test chamber wall panel.

[0011] Furthermore, the linear guide rail is vertically installed inside the main unit body.

[0012] Furthermore: the translation component includes a fixed frame, a lead screw is installed in the middle of the fixed frame, a servo motor is provided at one end of the lead screw, a screw sleeve slider is installed in the middle of the lead screw, and a translation frame is installed below the screw sleeve slider.

[0013] Furthermore, the lower pressure plate is rectangular and its dimensions are larger than those of the mold assembly.

[0014] Compared with existing technologies, the beneficial effects are:

[0015] 1. The system achieves alternating dual-station testing through two symmetrically arranged mold components and a movable pressing device. While one station is conducting a sealing test, the other station can simultaneously perform clamping / unclamping operations, significantly improving testing efficiency and reducing equipment downtime. It greatly enhances the efficiency of battery bipolar plate sealing testing while ensuring testing safety. Its modular structure and high-precision pressing system can adapt to the testing needs of products of different specifications.

[0016] 2. The lifting partition is driven by a linear motor, which can divide the test chamber into independent chambers during the test, avoiding the risk of personnel misoperation during high-pressure testing; after the test is completed, the partition is lowered to facilitate the repositioning of the pressure device; the chamber door and the lifting partition work together to seal the test chamber, and combined with the viewing window, visual monitoring is achieved, which not only ensures operational safety but also facilitates observation of the test status;

[0017] 3. Modular pressing system: The pressing device is precisely positioned by the translation of the lead screw, and the telescopic cylinder provides uniform downward pressure to ensure that the upper and lower templates are pressed tightly together; Optimized sealing: The upper template has a built-in sealing gasket, combined with the design of the lower pressing plate which is larger than the mold size, to effectively avoid leakage caused by uneven pressure distribution and improve test accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a battery bipolar plate sealing test machine according to the present invention;

[0019] Figure 2 This is a schematic diagram of the main unit of the battery bipolar plate sealing tester described in this utility model;

[0020] Figure 3 This is a top-view axonometric view of the mold assembly of the battery bipolar plate sealing test machine described in this utility model;

[0021] Figure 4 This is a bottom-view axonometric view of the mold assembly of the battery bipolar plate sealing tester described in this utility model;

[0022] Figure 5 This is a schematic diagram of the isolation device of the battery bipolar plate sealing test machine described in this utility model;

[0023] Figure 6 This is a schematic diagram of the pressing device of the battery bipolar plate sealing tester described in this utility model.

[0024] In the attached drawings, the following are the reference numerals: 101, main body; 102, test chamber; 103, limiting slide groove; 104, chassis door; 105, viewing window; 106, lower template; 107, upper template; 108, connecting pipe; 109, sealing gasket; 201, lifting partition; 202, clearance groove; 203, linear motor; 204, linear guide rail; 301, fixing frame; 302, lead screw; 303, servo motor; 304, screw sleeve slider; 305, translation frame; 306, telescopic cylinder; 307, lower pressure plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 A battery bipolar plate sealing tester includes a main unit for pressurizing and testing the sealing of battery bipolar plates, an isolation device for moving and separating workstations in the middle of the main unit, and a pressing device for moving, repositioning and applying downward pressure inside the main unit.

[0027] In this embodiment: the main unit includes a main body 101, a test chamber 102 is mounted on the main body 101, a limiting groove 103 is provided in the middle of the test chamber 102, two mold assemblies for fixing the bipolar plates of the battery are symmetrically arranged inside the test chamber 102, the mold assemblies are connected to the main body 101 through a connecting pipe 108, and two chassis doors 104 are symmetrically installed on the front of the test chamber 102; the mold assembly includes a lower template 106 and an upper template 107, and a sealing gasket 109 is pasted on the inner surface of the upper template 107; each chassis door 104 is provided with a viewing window 105 in the middle, and the outer ends of the two chassis doors 104 are respectively connected to the main body 101. 1. Hinged connection; The battery bipolar plate is inserted into the lower template 106 in the test chamber 102, and then the upper template 107 is fastened onto the lower template 106. The lower pressure plate 307 presses the upper template 107 onto the lower template 106, and the sealing gasket 109 ensures the seal. The main body 101 is connected to the inside of the lower template 106 through the connecting pipe 108 to conduct a sealing test on the battery bipolar plate. The chassis door 104 and the lifting partition 201 are used to close the test chamber 102 to ensure the safety of the battery bipolar plate sealing test. The viewing window 105 facilitates viewing the inside of the test chamber 102. The limiting slide groove 103 is used to limit the movement direction of the lifting partition 201.

[0028] In this embodiment: the isolation device includes a lifting partition 201, two linear motors 203 are symmetrically installed at the bottom of the lifting partition 201, and a linear guide rail 204 is provided inside the linear motor 203; a clearance groove 202 is provided at the top of the lifting partition 201, and the thickness of the lifting partition 201 is greater than the thickness of the wall panel of the test chamber 102; the linear guide rail 204 is vertically installed inside the main body 101; the linear motor 203 moves along the linear guide rail 204, driving the lifting partition 201 to rise and fall along the limiting slide groove 103, dividing the test chamber 102 into two parts, ensuring the safety of replacing the battery bipolar plates, and the clearance groove 202 is used to avoid the fixing frame 301;

[0029] In this embodiment: the pressing device includes a translation component for reciprocating movement. Two telescopic cylinders 306 are symmetrically mounted on the translation component, and a pressing plate 307 is installed between the telescopic ends of the telescopic cylinders 306. The translation component includes a fixed frame 301, a lead screw 302 is installed in the middle of the fixed frame 301, a servo motor 303 is provided at one end of the lead screw 302, a threaded sleeve slider 304 is installed in the middle of the lead screw 302, and a translation frame 305 is installed below the threaded sleeve slider 304. The pressing plate 307 is rectangular and its size is larger than that of the mold component. The fixed frame 301 supports the servo motor 303 to drive the lead screw 302 to rotate, pushing the threaded sleeve slider 304 to move the telescopic cylinders 306 and the pressing plate 307 through the translation frame 305, switching the work position. The translation frame 305 supports the extension of the telescopic cylinders 306 to push the pressing plate 307 to press the upper template 107 onto the lower template 106, and the sealing gasket 109 ensures a seal.

[0030] Working principle: The lifting partition 201 divides the test chamber 102 into two parts. First, the battery bipolar plate is inserted into one of the lower templates 106 of the test chamber 102. Then, the upper template 107 is fastened onto the lower template 106. After that, the chamber door 104 is closed. The translation frame 305 supports the extension cylinder 306 to push the lower pressure plate 307 to press the upper template 107 onto the lower template 106. The sealing gasket 109 ensures a seal. The main body 101 is connected to the inside of the lower template 106 through the connecting pipe 108 to conduct a sealing test on the battery bipolar plate. At the same time, the other chamber door 104 is opened, and the second battery bipolar plate is inserted into the other lower template 106 according to the above steps. The chamber door 104 is then closed.

[0031] After the first battery bipolar plate sealing test is completed, the telescopic cylinder 306 retracts, causing the lower pressure plate 307 to reset. The linear motor 203 first moves down along the linear guide 204, causing the lifting partition 201 to descend along the limiting slide groove 103, connecting the two parts of the test chamber 102. Then, the fixed frame 301 supports the servo motor 303 to drive the lead screw 302 to rotate, pushing the screw sleeve slider 304 to move the telescopic cylinder 306 and the lower pressure plate 307 from one side to the other through the translation frame 305. Then, the linear motor 203 moves down along the linear guide 204. As rail 204 rises, it causes lifting partition 201 to rise and reset along limiting slide groove 103, separating test chamber 102 again. Avoidance groove 202 is used to avoid fixed frame 301. Finally, translation frame 305 supports telescopic cylinder 306 to extend and push lower pressure plate 307 to press upper template 107 onto lower template 106 for sealing test of second battery bipolar plate. At the same time, after lifting partition 201 blocks test chamber 102 again, operator can take out first battery bipolar plate and put in third battery bipolar plate to prepare for test.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery bipolar plate sealing tester, comprising a main unit for pressurizing and testing the sealing of battery bipolar plates, characterized in that: It also includes an isolation device in the middle of the main unit for moving and separating workstations vertically, and a pressing device installed at the top of the main unit for moving and pressing down. The main unit includes a main body (101), a test chamber (102) is provided on the main body (101), a limiting groove (103) is provided in the middle of the test chamber (102), two mold assemblies for fixing the battery bipolar plate sealing test are symmetrically arranged inside the test chamber (102), the mold assemblies are connected to the main body (101) through a connecting pipe (108), and two chassis doors (104) are symmetrically installed on the front of the test chamber (102). The isolation device includes a lifting partition (201), and two linear motors (203) are symmetrically installed at the bottom of the lifting partition (201). A linear guide rail (204) is provided inside the linear motor (203). The pressing device includes a translation component for reciprocating movement, on which two telescopic cylinders (306) are symmetrically mounted, and a pressing plate (307) is installed between the telescopic ends of the telescopic cylinders (306).

2. The battery bipolar plate sealing test machine according to claim 1, characterized in that: The mold assembly includes a lower template (106) and an upper template (107), and a sealing gasket (109) is attached to the inner surface of the upper template (107).

3. The battery bipolar plate sealing test machine according to claim 2, characterized in that: A viewing window (105) is provided between the two chassis doors (104), and the outer ends of the two chassis doors (104) are respectively hinged to the main body (101).

4. The battery bipolar plate sealing test machine according to claim 1, characterized in that: The top of the lifting partition (201) is provided with a clearance groove (202), and the thickness of the lifting partition (201) is greater than the thickness of the wall panel of the test chamber (102).

5. A battery bipolar plate sealing tester according to claim 4, characterized in that: The linear guide rail (204) is vertically installed inside the main body (101).

6. The battery bipolar plate sealing test machine according to claim 1, characterized in that: The translation component includes a fixed frame (301), a lead screw (302) is installed in the middle of the fixed frame (301), a servo motor (303) is provided at one end of the lead screw (302), a screw sleeve slider (304) is installed in the middle of the lead screw (302), and a translation frame (305) is installed below the screw sleeve slider (304).

7. A battery bipolar plate sealing tester according to claim 6, characterized in that: The lower pressure plate (307) is rectangular and its size is larger than that of the mold assembly.

Images