New energy battery cover plate helium detection tool

Abstract

The utility model relates to the technical field of battery cover plate leakage detection devices, in particular to a helium detection tool for a new energy battery cover plate. The battery cover plate is clamped by the two clamping plates, and the movable sealing covers are mounted on the inner side and the outer side of the battery cover plate, so that helium detection and sealing can be accurately performed on the positive electrode, the negative electrode and the anti-explosion valve. The size-adjustable design not only can be compatible with various new energy battery cover plates with different sizes, but also can effectively isolate and detect each key part on the battery cover plate, so that the detection accuracy and efficiency are improved, and the application range is enlarged. Meanwhile, by connecting the helium filling device and the helium mass spectrometer leak detector, automatic detection is realized, and the complexity of manual operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cover leakage detection devices, in particular to a new energy battery cover helium detection tooling. Background Art

[0002] At present, helium inspection of battery covers mainly uses helium as a tracer gas, and the helium inspection fixture is used to detect leakage of the battery cover, such as detecting leakage of the positive electrode, negative electrode and explosion-proof valve.

[0003] A commonly used inspection method involves placing the workpiece in a vacuum chamber, which forms a seal with the workpiece. The inspection system then automatically completes the entire process of large leak detection, vacuuming, filling with helium, leak detection, and recycling. This method features a fast production cycle and high leak detection accuracy. However, this inspection method often results in an increase in the number of defective products, leading to an investigation into the cause. After eliminating factors related to product quality, it was discovered that the battery cover had a large number of holes and low material strength, which caused it to deform under high pressure. This, in turn, caused the battery cover to leak due to pressure deformation, severely reducing the accuracy of helium inspection.

[0004] Therefore, in order to solve the above-mentioned technical problems, a targeted solution is given in patent CN218628847U. The patent discloses a helium inspection fixture for new energy battery cover plates. The specific solution is as follows: the helium inspection fixture includes a lower cavity, and a first groove is provided on the top of the lower cavity for placing the battery cover plate body. A second groove is provided at both ends of the first groove, and a third groove is provided in the middle to avoid the raised area at the bottom of the battery cover plate body. The outer edge portions of the first groove, the second groove and the third groove are respectively provided in the first card slot, the second card slot and the third card slot for clamping the packaging rubber seal. Through the above-mentioned technical solution, the deformation of the battery cover plate due to pressure can be effectively eliminated, and the accuracy of the detection is further improved.

[0005] During actual use, batteries vary in size due to different usage scenarios, and the corresponding battery cover sizes will also change accordingly. However, although the size of the battery cover will increase or decrease, its main layout remains unchanged, that is, the positive electrode-explosion-proof valve-negative electrode layout is still retained, only the distance between the positive electrode, explosion-proof valve, and negative electrode will change. The above-mentioned helium detection fixture has relatively fixed positions for the detection ports for detecting the positive electrode, explosion-proof valve, and negative electrode. Therefore, it can only detect battery covers of one size and specification, and cannot meet the current requirements of multi-purpose use of one device.

[0006] It can be seen that the current helium inspection fixture has relatively simple inspection specifications and needs further improvement to expand its scope of application. Utility Model Content

[0007] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a new energy battery cover helium inspection tool. The present invention is applicable to battery covers of various sizes and specifications.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A new energy battery cover helium inspection tool comprises two clamping plates that can be clamped on both sides of the battery cover, wherein a plurality of sealing covers that can be moved closer to or farther away from each other are installed on the clamping surfaces of the two clamping plates, and each sealing cover can be respectively arranged on the outside of the positive electrode, the negative electrode and the explosion-proof valve under the clamping action of the clamping plates; a helium pressure-maintaining chamber filled with helium is formed in the sealing cover on either side of the positive electrode, the negative electrode and the explosion-proof valve, and a permeation negative pressure chamber for sucking the permeated helium is formed in the sealing cover on the other side; each helium pressure-maintaining chamber is respectively connected to a helium filling device, and each permeation negative pressure chamber is respectively connected to a helium mass spectrometer leak detector.

[0010] As a further solution of the present invention: a guide groove is provided on the clamping surface of the splint, and the groove length direction of the guide groove is parallel to the arrangement direction of the positive electrode, the negative electrode and the explosion-proof valve; each sealing cover on the same splint is slidably arranged in the guide groove.

[0011] As a further solution of the present invention: the two splints are arranged horizontally and distributed on the upper and lower sides of the battery cover; the splint on the lower side is installed on the support base, and the splint on the upper side is installed on the telescopic end of the vertical telescopic rod. The vertical telescopic rod can drive the upper splint to move toward the lower splint to clamp the battery cover.

[0012] As a further solution of the present invention: a fixing plate is detachably installed on the upper surface of the clamping plate located on the lower side, the fixing plate surface is arranged horizontally, and a mounting hole is opened on the upper surface of the fixing plate through the plate body, the battery cover plate is horizontally embedded in the mounting hole and sealed on each sealing cover on the bottom clamping plate.

[0013] As a further solution of the present invention: a plurality of positioning holes are opened on the lower plate surface of the fixing plate, and a plurality of positioning pins are installed on the upper plate surface of the clamping plate located on the lower side, and each positioning pin is inserted into the corresponding positioning hole.

[0014] As a further solution of the utility model: it also includes a support frame, a horizontal telescopic rod is fixedly installed on the bottom of the support frame, and the support base is fixedly installed on the telescopic end of the horizontal telescopic rod. The horizontal telescopic rod can push the support base to move back and forth between the loading position and the test position of the battery cover.

[0015] As a further solution of the present invention: a plurality of guide rails are fixedly installed on the support base, and the length direction of each guide rail is parallel to the telescopic direction of the horizontal telescopic rod; a plurality of support blocks are installed on the support frame, each support block is provided with a slide groove, and each guide rail is slidably installed in the corresponding slide groove.

[0016] As a further solution of the present invention: safety protection plates are installed on the left, rear and right sides of the splint located on the upper side, and a pair of gratings that match each other are installed on the front side of the splint, and a light curtain covering the front side of the splint is formed between the two gratings.

[0017] As a further solution of the present invention: a pressure sensor for detecting the clamping force is installed on the clamping surface of the upper splint, the pressure sensor is connected to a pressure digital display that can display the pressure value in real time, and the pressure digital display is installed on the support frame.

[0018] As a further solution of the present invention: a limiting column is installed on the upper plate surface of the fixed plate to support the pressing plate located on the upper side to limit the pressing depth of the pressing plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This application uses two plywood to clamp the battery cover and installs movable sealing covers on both the inside and outside of the battery cover, which can accurately detect and seal the positive electrode, negative electrode and explosion-proof valve for helium. This adjustable distance design is not only compatible with a variety of new energy battery covers of different sizes, but also can effectively isolate and detect various key parts on the battery cover, improving the accuracy and efficiency of detection and expanding the scope of application. At the same time, by connecting the helium filling device and the helium mass spectrometer leak detector, automated detection is achieved, reducing the complexity of manual operation.

[0021] 2. Guide grooves are provided on the clamping plate, and the sealing cover slides within these grooves. This not only improves the movement accuracy and stability of the sealing cover, but also allows it to fit more tightly against key areas of the battery cover. This helps reduce helium leakage and improves detection sensitivity. The guide groove design also makes adjustment and replacement of the sealing cover more convenient.

[0022] 3. By horizontally arranging clamping plates on the upper and lower sides of the battery cover and using a vertical telescopic rod to drive the upper clamping plate, precise clamping of the battery cover is achieved. This not only improves the tooling's automation level but also makes the clamping process more stable and reliable. Furthermore, the combination of the support base and the vertical telescopic rod allows the tooling to accommodate battery covers of varying sizes and shapes.

[0023] 4. A removable fixing plate is installed on the lower clamping plate and inserted into the battery cover through the mounting hole. This design allows the tooling to more accurately position the battery cover, ensuring that the sealing cover can correctly cover the key parts. At the same time, the design of the fixing plate also allows the tooling to easily adapt to battery covers of different specifications, improving the tooling's versatility and flexibility.

[0024] 5. Positioning holes and positioning pins are installed on the fixing plate and the lower clamping plate. This design further improves the stability and accuracy of the fixing plate. By inserting the positioning pins, it can be ensured that the fixing plate will not move or deform during the clamping process, thus ensuring the accuracy and reliability of the detection.

[0025] 6. A horizontal telescopic rod is installed on the support frame, pushing the support base back and forth between the loading and testing positions of the battery cover. This design automates the loading, unloading, and testing processes of the tooling. This not only improves tooling efficiency but also reduces the complexity of manual operation. Furthermore, the horizontal telescopic rod design allows the tooling to easily adapt to different production line layouts.

[0026] 7. Installing guide rails on the support base and providing slots on the support frame for mounting the guide rails improves the stability and movement accuracy of the support base. By sliding the guide rails and slots, the support base is prevented from shaking or shifting during movement, thus ensuring the accuracy and reliability of detection.

[0027] 8. A safety guard and light barrier are installed around the upper clamping plate, enhancing the safety of the tooling. The guard prevents operator injury during the clamping process, while the light barrier monitors the movement of the clamping plate in real time, ensuring no accidents occur during the clamping process. This design not only protects operator safety but also enhances the reliability of the tooling.

[0028] 9. A pressure sensor is installed on the clamping surface of the upper clamping plate and connected to a digital pressure gauge. This design allows real-time monitoring of the clamping force. By reading the value on the digital pressure gauge, it is possible to ensure that the clamping force is within the appropriate range, thus avoiding detection errors caused by insufficient or excessive clamping force. This design improves detection accuracy and reliability.

[0029] 10. Limiting posts are installed on the fixing plate to limit the downward pressure of the upper pressure plate. This design prevents the pressure plate from over-pressing during the clamping process and damaging the battery cover or sealing cover. By adjusting the height of the limiting posts, the downward pressure of the pressure plate can be precisely controlled, ensuring the safety and reliability of the clamping process. This design not only protects the integrity of the battery cover and sealing cover, but also improves the durability of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0031] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0032] In the figure: 1. Support frame; 11. Vertical telescopic rod; 111. Connecting seat; 1111. Linear bearing; 112. Fixing bolt; 113. Latch; 114. Guide rod; 115. Pressure digital display; 116. Buzzer; 117. Safety protection plate; 118. Grating; 119. Support block; 1120. Horizontal telescopic rod; 2. Clamp; 2a. Upper clamp; 2b. Lower clamp; 21. Sealing cover; 22. Positioning pin; 23. Guide groove; 3. Fixing plate; 31. Mounting hole; 32. Limiting column; 4. Support base; 41. Guide rail; 42. Push rod; 5. Battery cover. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figures 1 and 2 The helium inspection tooling of the present application includes a support frame 1, on which are mounted two splints 2, a horizontal telescopic rod 1120, a vertical telescopic rod 11 and a support base 4 and other components.

[0035] Two vertical telescopic rods 11 arranged side by side are fixedly installed on the top of the support frame 1, and the telescopic directions of the two vertical telescopic rods 11 are arranged vertically. What the two vertical telescopic rods 11 both adopt is cylinder, and they are telescoped synchronously.

[0036] A cuboid-shaped connector 111 is fixedly mounted on the telescopic end of the vertical telescopic rod 11. Each of the four corners of the connector 111 has a through-hole, within which a linear bearing 1111 is mounted. Four guide rods 114 are fixedly attached to corresponding positions on the support frame 1. These guide rods 114 pass through the through-holes and cooperate with the linear bearings 1111 to provide a stable guide for the vertical movement of the connector 111, preventing it from shaking during the downward pressing process and improving the accuracy of the crimping.

[0037] A square hole is formed on the lower end surface of the connecting base 111, and a square block is protruding from the upper surface of the upper clamping plate 2, i.e., the upper clamping plate 2a. The block is inserted into the square hole, and a latch 113 is inserted through the side wall of the square hole, thereby securing the block in place. To enhance the stability of the upper clamping plate 2a's installation, two threaded holes are formed in the side walls of the square hole. Two fixing bolts 112 are threaded into these threaded holes, with their front ends resting against the side walls of the block, further enhancing the tightness and firmness of the connection between the block and the square hole.

[0038] A linear guide groove 23 is provided on the lower surface of the upper clamping plate 2a, and three sealing covers 21 with downward openings are installed in the guide groove 23 for damping sliding. The sizes of the three sealing covers 21 are adapted to the sizes of the positive electrode, negative electrode and explosion-proof valve on the battery cover 5, so that the sealing covers can be arranged on the outside of the positive electrode, negative electrode and explosion-proof valve to form corresponding helium pressure-maintaining chambers, and each helium pressure-maintaining chamber is respectively connected to the helium filling device.

[0039] A horizontal telescopic rod 1120, also powered by a cylinder, is mounted at the bottom of the support frame 1. A support base 4 is fixedly mounted on the telescopic end of the horizontal telescopic rod 1120. Two guide rails 41 are fixedly mounted on the support base 4, with the lengths of the two guide rails 41 being parallel to the telescopic direction of the horizontal telescopic rod 1120.

[0040] In order to control the telescopic length of the horizontal telescopic rod 1120, two top rods 42 are also installed on the support base 4. When the top rods 42 and the limit plates on the support frame 1 abut against each other, the support base 4 moves to the corresponding loading position; when the horizontal telescopic rod 1120 is shortened to the set length, the support base 4 enters the test position.

[0041] A lower clamping plate 2b is installed on the support base 4 by a commonly used bolt connection method. A linear guide groove 23 is provided on the upper plate surface of the lower clamping plate 2b. Three sealing covers 21 with downward openings are installed in the guide groove 23 with damping sliding. The sizes of the three sealing covers 21 are adapted to the sizes of the positive electrode, negative electrode and explosion-proof valve on the battery cover 5, so that the sealing covers can be located on the outside of the positive electrode, negative electrode and explosion-proof valve to form a permeation negative pressure chamber, and each permeation negative pressure chamber is connected to the helium mass spectrometer leak detector. At the same time, a positioning pin 22 is also installed on the upper plate surface of the lower clamping plate 2b, and a positioning hole is provided on the lower plate surface of the fixed plate 3 that cooperates with it. The positioning hole is sleeved on the positioning pin 22 from top to bottom to install the fixed plate 3 on the lower clamping plate 2b.

[0042] In order to further improve the stability of the installation of the battery cover 5, a mounting hole 31 is opened on the upper plate surface of the fixing plate 3. The mounting hole 31 is a blind hole, but three through holes are opened at the bottom of the blind hole, and these three through holes can be connected to the three sealing covers 21 on the lower clamping plate 2b, thereby realizing the sealing cover design of the positive electrode, negative electrode and explosion-proof valve.

[0043] In order to further improve the airtightness during the test, sealing rings are set at the joints between holes, holes and covers, and plates and covers, and the elastic deformation of the sealing rings improves the sealing reliability.

[0044] A pressure sensor is installed on the clamping surface of the upper clamping plate 2 and connected to a pressure digital display 115 on the support frame 1 to monitor the clamping force in real time. To prevent excessive downward pressure on the upper clamping plate 2a, a limiter 32 is installed on the fixing plate 3 to limit the depth of the upper clamping plate, preventing damage to the battery cover 5 or sealing cover 21 during the clamping process.

[0045] A safety guard plate 117 and a light barrier 118 are installed around the upper clamping plate 2, enhancing the safety of the tooling. The safety guard plate 117 prevents operator injury during the clamping process, while the light barrier 118 monitors the movement of the clamping plate 2 in real time, ensuring no accidents occur during the clamping process. This design not only protects operator safety but also enhances the reliability of the tooling.

[0046] The specific process of using this application is as follows:

[0047] Step 1: The operator selects a fixing plate 3 of corresponding size according to the size of the battery cover 5.

[0048] Step 2: Start the horizontal telescopic rod 1120 to move the support base 4 to the loading position. At this time, install the fixed plate 3 on the lower clamping plate 2b, and adjust the positions of the three sealing covers 21 on the lower clamping plate 2b so that the three sealing covers 21 are respectively aligned with the three through holes on the fixed plate 3 and connected to each other. Then place the battery cover 5 into the mounting hole 31.

[0049] Step 3: Start the horizontal telescopic rod 1120 to move the support base 4 to the testing position.

[0050] Step 4: Open the grating 118 and adjust the position of each sealing cover 21 in the upper splint 2a accordingly; then start the plumb telescopic rod 11, the plumb telescopic rod 11 extends, so that the upper splint 2a is pressed down on the upper side of the battery cover 5, and at the same time, each sealing cover 21 is arranged on the outside of the positive electrode, negative electrode and explosion-proof valve, and forms a corresponding helium pressure holding chamber and permeation negative pressure chamber.

[0051] Step 5: Simultaneously monitor the value on the pressure digital display 115. When the value reaches the set value, the vertical telescopic rod 11 stops extending and maintains the current compression state.

[0052] Step 6: Start the helium filling device and the helium mass spectrometer leak detector. The helium filling device fills a certain amount of helium into the helium pressure chamber and maintains the current pressure. At the same time, the helium mass spectrometer leak detector uses a vacuum negative pressure method to extract the gas in the permeation negative pressure chamber and check the helium content therein.

[0053] Step 7: When the helium mass spectrometer leak detector detects helium, it will sound an alarm through the buzzer 116 and mark the current battery cover 5 as unqualified, otherwise it will be marked as qualified.

[0054] Step 8: After the test is completed, all structures are reset. At this time, the operator removes the battery cover 5 in the installation hole 31 and arranges them according to the test results.

[0055] Step 9: The operator puts in a new battery cover 5 and performs the next round of testing according to the operating procedures of steps 1 to 8.

[0056] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new energy battery cover helium inspection tool, characterized in that: The invention comprises two clamping plates (2) which can be clamped on both sides of the battery cover (5). A plurality of sealing covers (21) which can be moved closer to or farther away from each other are installed on the clamping surfaces of the two clamping plates (2). Each sealing cover (21) can be independently sealed and arranged on the outside of the positive electrode, the negative electrode and the explosion-proof valve under the clamping action of the clamping plates (2). A helium pressure-maintaining chamber filled with helium is formed in the sealing cover (21) on either side of the positive electrode, the negative electrode and the explosion-proof valve, and a permeation negative pressure chamber for sucking and penetrating helium is formed in the sealing cover (21) on the other side. Each helium pressure-maintaining chamber is respectively connected to a helium filling device, and each permeation negative pressure chamber is respectively connected to a helium mass spectrometer leak detector.

2. A new energy battery cover helium inspection tool according to claim 1, characterized in that: A guide groove (23) is provided on the clamping surface of the clamping plate (2), and the groove length direction of the guide groove (23) is parallel to the arrangement direction of the positive electrode, the negative electrode and the explosion-proof valve; each sealing cover (21) on the same clamping plate (2) is slidably arranged in the guide groove (23).

3. A new energy battery cover helium inspection tool according to claim 2, characterized in that: The two clamping plates (2) are both arranged horizontally and distributed on the upper and lower sides of the battery cover (5); the clamping plate (2) located on the lower side is installed on the support base (4), and the clamping plate (2) located on the upper side is installed on the telescopic end of the vertical telescopic rod (11); the vertical telescopic rod (11) can drive the clamping plate (2) on the upper side to move toward the clamping plate (2) on the lower side to align and clamp the battery cover (5).

4. A new energy battery cover helium inspection tool according to claim 3, characterized in that: A fixing plate (3) is detachably mounted on the upper surface of the clamping plate (2) located at the lower side. The fixing plate (3) is arranged horizontally. A mounting hole (31) is provided on the upper surface of the fixing plate (3) through the plate body. The battery cover (5) is horizontally embedded in the mounting hole (31) and sealed on each sealing cover (21) on the bottom clamping plate (2).

5. A new energy battery cover helium inspection tool according to claim 4, characterized in that: A plurality of positioning holes are provided on the lower surface of the fixing plate (3), and a plurality of positioning pins (22) are installed on the upper surface of the clamping plate (2) located on the lower side, and each positioning pin (22) is inserted into a corresponding positioning hole.

6. A new energy battery cover helium inspection tool according to any one of claims 1-5, characterized in that: The invention also includes a support frame (1), wherein a horizontal telescopic rod (1120) is fixedly mounted on the bottom of the support frame (1), and a support base (4) is fixedly mounted on the telescopic end of the horizontal telescopic rod (1120). The horizontal telescopic rod (1120) can push the support base (4) to move back and forth between the loading position and the testing position of the battery cover (5).

7. A new energy battery cover helium inspection tool according to claim 6, characterized in that: A plurality of guide rails (41) are fixedly mounted on the support base (4), and the length direction of each guide rail (41) is parallel to the telescopic direction of the horizontal telescopic rod (1120); a plurality of support blocks (119) are mounted on the support frame (1), and each support block (119) is provided with a slide groove, and each guide rail (41) is slidably mounted in the corresponding slide groove.

8. The helium inspection tool for new energy battery cover according to claim 7, characterized in that: Safety protection plates (117) are installed on the left, rear and right sides of the upper clamping plate (2), and a pair of mutually matching gratings (118) are installed on the front side of the clamping plate (2), and a light curtain covering the front side of the clamping plate (2) is formed between the two gratings (118).

9. A new energy battery cover helium inspection tool according to claim 8, characterized in that: A pressure sensor for detecting the clamping force is installed on the clamping surface of the upper clamping plate (2). The pressure sensor is connected to a pressure digital display (115) that can display the pressure value in real time, and the pressure digital display (115) is installed on the support frame (1).

10. A new energy battery cover helium inspection tool according to claim 9, characterized in that: A limiting column (32) is installed on the upper plate surface of the fixed plate (3) to support the pressing plate located on the upper side to limit the pressing depth of the pressing plate.

Images