Power battery cover plate detection device

Abstract

The utility model discloses a power battery cover plate detection device. The power battery cover plate detection device comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die base capable of vertically moving up and down, an upper die block is arranged at the lower end of the upper die base, a first gas channel is formed in the upper die base and communicates with the lower portion of the upper die block, and a gas inlet communicating with the first gas channel is formed in one side of the upper die base. The lower die assembly comprises a lower die base capable of horizontally moving, a lower die block vertically corresponding to the upper die block is arranged on the lower die base, a second gas channel is formed in the lower die base and communicated with the upper portion of the lower die block, and a gas outlet communicated with the second gas channel is formed in one side of the lower die base. Helium is injected into the first gas channel, vacuumizing is carried out through the second gas channel, extracted gas is input into the gas detection equipment, whether welding of the cover plate is qualified or not is judged according to whether the gas detection equipment detects helium or nitrogen or not, operation is convenient, and detection efficiency is high.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to a power battery cover plate detection device. Background Art

[0002] During the production process of automotive prismatic battery packs, solid cells are installed within the pack, which then need to be filled with liquid before a cover is installed on top to seal the pack. The seal within the pack is crucial to the safety of the entire battery pack. Laser welding is often used to secure the cover to the terminals. Flaws in the laser weld can result in a poor seal, and the weld quality (sealing quality) of the cover can directly impact the safety of the battery pack and even cause a fire. Traditional testing devices are inadequate for detecting the seal of the cover. Therefore, a power battery cover inspection device was designed to address this issue.

[0003] It should be noted that the above technical background is merely for the purpose of providing a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. It should not be assumed that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present invention. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a power battery cover plate detection device.

[0005] In order to achieve the above objectives and other related objectives, the technical solution provided by the present invention is as follows: a power battery cover plate detection device, including a detection unit, the detection unit including an upper mold assembly and a lower mold assembly; the upper mold assembly includes an upper mold base that can move vertically up and down, an upper module is provided at the lower end of the upper mold base, a first gas channel is provided inside the upper mold base, the first gas channel is connected to the bottom of the upper module, and an air inlet connected to the first gas channel is provided on one side of the upper mold base; the lower mold assembly includes a lower mold base that can move horizontally, a lower module corresponding to the upper and lower parts of the upper module is provided on the lower mold base, a second gas channel is provided inside the lower mold base, the second gas channel is connected to the top of the lower module, and an air outlet connected to the second gas channel is provided on one side of the lower mold base for connecting to a gas detection device. Wherein, the lower end surface of the upper module and the upper end surface of the lower module are both set to correspond to the shape of the cover plate. The upper mold base injects helium or nitrogen through the first gas channel, and the gas enters the upper space of the cover plate. The lower mold base vacuums the lower space of the cover plate through the second gas channel, and the extracted gas is input into the gas detection equipment. When the gas detection equipment detects helium or nitrogen, it indicates that the cover plate has a gas leak, and the cover plate welding is judged to be unqualified.

[0006] Furthermore, the upper end of the upper die base is connected to the telescopic end of the linear cylinder, and the linear cylinder is fixed to the mounting plate. In this solution, the linear cylinder is used to realize the up and down movement of the upper die base, which is fast and has high movement accuracy.

[0007] Furthermore, a plurality of guide posts are provided between the upper die base and the mounting plate, the upper ends of the guide posts extending through the mounting plate, and linear bearings are provided between the guide posts and the mounting plate. In this solution, the upper die base and the upper die block can maintain vertical up and down motion, thereby improving motion accuracy.

[0008] Furthermore, there are four guide pillars, which are respectively arranged at the four corners of the upper die base. In this solution, a guide pillar is respectively arranged at the four corners of the upper die base, and the structure is more stable during operation.

[0009] Furthermore, the upper end surface of the lower die base is provided with a mounting groove, and the lower module is embedded in the mounting groove. In this solution, the lower module is arranged in the mounting groove, which is convenient for installation and has a stable structure.

[0010] Furthermore, the lower module is provided with limit blocks on all sides, and the limit blocks are angular structures. In this solution, the use of the angular limit structure can stabilize the placement of the cover plate on the lower module, improve the mold closing accuracy, and thus improve the mold closing sealing.

[0011] Furthermore, the inspection unit also includes a transfer mechanism comprising a mounting base, a motor and a horizontal guide rail mounted on the mounting base, the lower die base mounted on the horizontal guide rail, and a motor in transmission connection with the lower die base to drive it back and forth on the horizontal guide rail. In this embodiment, the motor drives the lower die base to move horizontally on the horizontal guide rail, facilitating the loading and inspection of the lower die assembly and improving inspection efficiency.

[0012] Furthermore, the upper module is an upper mold sealing plate, and the material of the upper mold sealing plate is PU. In this solution, PU has good elasticity and moderate hardness. When the upper module made of PU is molded with the lower module, it will not crush the product, and it has good sealing performance, which can save the use of a sealing ring.

[0013] Furthermore, the lower die block is a lower die sealing gasket, and the material of the lower die sealing gasket is nitrile rubber. In this solution, nitrile rubber has good elasticity and moderate hardness. When the lower die block made of nitrile rubber is molded with the upper die block, it will not crush the product, and has good sealing performance, which can save the use of a sealing ring.

[0014] Furthermore, the detection device is provided with two or more detection units, and each of the detection units is arranged side by side. In this solution, multiple detection units are used for synchronous detection, thereby improving detection efficiency.

[0015] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0016] The power battery cover plate detection device designed by the utility model can inject helium or nitrogen into the first gas channel, vacuumize through the second gas channel, and input the extracted gas into the gas detection equipment. Whether the cover plate is welded properly is judged by whether the gas detection equipment detects helium or nitrogen. The utility model has convenient operation, high detection efficiency, strong practicality, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the detection device of the present utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the detection unit of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of the upper mold assembly and the lower mold assembly of the present utility model;

[0020] In the above figures, 1. upper die base; 2. upper module; 3. air inlet; 4. lower die base; 5. lower module; 6. air outlet; 7. linear cylinder; 8. mounting plate; 9. guide column; 10. limit block; 11. mounting base; 12. motor; 13. horizontal guide rail. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" 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.

[0023] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0026] Example 1: See attached Figure 2 and attached Figure 3 As shown, this embodiment provides a power battery cover detection device, including a detection unit, which includes an upper mold assembly and a lower mold assembly; the upper mold assembly includes an upper mold base 1 that can move vertically up and down, and an upper module 2 is provided at the lower end of the upper mold base 1, and a first gas channel is provided inside the upper mold base 1, and the first gas channel is connected to the bottom of the upper module 2, and an air inlet 3 connected to the first gas channel is provided on one side of the upper mold base 1; the lower mold assembly includes a lower mold base 4 that can move horizontally, and a lower module 5 corresponding to the upper module 2 is provided on the lower mold base 4, and a second gas channel is provided inside the lower mold base 4, and the second gas channel is connected to the top of the lower module 5, and an air outlet 6 connected to the second gas channel is provided on one side of the lower mold base 4, and the air outlet 6 is used to connect the gas detection equipment.

[0027] In this embodiment, the lower end face of the upper module 2 and the upper end face of the lower module 5 are both set to correspond to the shape of the cover plate. The cover plate is placed on the lower module 5. After the upper module 2 and the lower module 5 are molded together, a closed space is formed. The upper space of the cover plate is connected to the first gas channel, and the lower space of the cover plate is connected to the second gas channel. When the welding quality of the cover plate is qualified, there is no gas circulation between the upper and lower spaces of the cover plate. When the welding quality of the cover plate is unqualified, gas circulation can be generated between the upper and lower spaces of the cover plate. The upper mold base 1 injects helium or nitrogen through the first gas channel, and the gas enters the upper space of the cover plate. The lower mold base 4 vacuums the lower space of the cover plate through the second gas channel, and the extracted gas is input into the gas detection equipment. When the gas detection equipment detects helium or nitrogen, it means that the cover plate is leaking, and the cover plate welding is determined to be unqualified.

[0028] The gas injected into the first gas channel is not limited to helium and nitrogen, and other gases that are easy to detect and safe can be used.

[0029] Example 2: See attached Figure 2 and attached Figure 3 As shown, this embodiment is a further improvement on the basis of the first embodiment, and its specific method is as follows: the upper end of the upper die base 1 is connected to the telescopic end of the linear cylinder 7, and the linear cylinder 7 is fixed on the mounting plate 8. The linear cylinder 7 is used to realize the up and down movement of the upper die base 1, and the movement is fast and the movement precision is high. A number of guide columns 9 are arranged between the upper die base 1 and the mounting plate 8. The upper end of the guide column 9 is arranged through the mounting plate 8, and a linear bearing is arranged between the guide column 9 and the mounting plate 8. The upper die base 1 carries the upper module 2 to maintain vertical up and down movement, thereby improving the movement precision. There are four guide columns 9, which are respectively arranged at the four corners of the upper die base 1. A guide column 9 is arranged at each of the four corners of the upper die base 1, and the structure is more stable during operation.

[0030] Example 3: See attached Figure 2 As shown, this embodiment is a further improvement on the basis of the second embodiment, and its specific method is as follows: the upper end surface of the lower die base 4 is provided with a mounting groove, and the lower die block 5 is embedded in the mounting groove. The lower die block 5 is arranged in the mounting groove, which is convenient for installation and has a stable structure. Figure 3 As shown, the lower module 5 is provided with limit blocks 10 on all sides. The limit blocks 10 are angular structures. The use of the angular limit structure can stabilize the placement of the cover plate on the lower module 5, improve the mold closing accuracy, and thus improve the mold closing sealing.

[0031] Example 4: See attached Figure 2As shown, this embodiment is a further improvement on the third embodiment. Specifically, the detection unit further includes a transfer mechanism, which includes a mounting base 11, on which a motor 12 and a horizontal guide rail 13 are disposed. The lower die base 4 is disposed on the horizontal guide rail 13. The motor 12 is in transmission connection with the lower die base 4 and drives it to move back and forth on the horizontal guide rail 13. In this embodiment, the motor 12 drives the lower die base 4 to move horizontally on the horizontal guide rail 13, which facilitates the loading and testing of the lower die assembly and improves the detection efficiency.

[0032] Embodiment 5: This embodiment is a further improvement on the basis of embodiment 4, and its specific method is as follows: the upper module 2 is an upper mold sealing plate, and the material of the upper mold sealing plate is urethane foam. Urea foam has good elasticity and moderate hardness. When the upper module 2 made of urethane foam is molded with the lower module 5, it will not crush the product, and it has good sealing performance, and the use of a sealing ring can be omitted. The lower module 5 is a lower mold sealing gasket, and the material of the lower mold sealing gasket is nitrile rubber. Nitrile rubber has good elasticity and moderate hardness. When the lower module 5 made of nitrile rubber is molded with the upper module 2, it will not crush the product, and it has good sealing performance, and the use of a sealing ring can be omitted.

[0033] Example 6: See attached Figure 1 As shown, this embodiment is a further improvement on the basis of the fifth embodiment, and its specific method is as follows: the detection device is provided with two or more detection units, and each detection unit is arranged side by side. In this embodiment, multiple detection units are used for synchronous detection, thereby improving the detection efficiency.

[0034] The power battery cover plate detection device designed by the utility model can inject helium or nitrogen into the first gas channel, vacuumize through the second gas channel, and input the extracted gas into the gas detection equipment. Whether the cover plate is welded properly is judged by whether the gas detection equipment detects helium or nitrogen. The utility model has convenient operation, high detection efficiency, strong practicality, and is suitable for promotion.

[0035] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A power battery cover plate detection device, characterized in that: comprising a detection unit, the detection unit comprising an upper mold assembly and a lower mold assembly; The upper die assembly comprises an upper die base (1) capable of vertical upward and downward movement, an upper die block (2) being provided at the lower end of the upper die base (1), a first gas channel being provided inside the upper die base (1), the first gas channel being connected to the lower portion of the upper die block (2), and an air inlet (3) being provided on one side of the upper die base (1) and being connected to the first gas channel; The lower die assembly comprises a horizontally movable lower die base (4), a lower die block (5) corresponding to the upper die block (2) is provided on the lower die base (4), a second gas channel is provided inside the lower die base (4), the second gas channel is connected to the upper part of the lower die block (5), and an air outlet (6) connected to the second gas channel is provided on one side of the lower die base (4).

2. A power battery cover plate detection device according to claim 1, characterized in that: The upper end of the upper die base (1) is connected to the telescopic end of the linear cylinder (7), and the linear cylinder (7) is fixed on the mounting plate (8).

3. A power battery cover plate detection device according to claim 2, characterized in that: A plurality of guide columns (9) are provided between the upper die seat (1) and the mounting plate (8), the upper ends of the guide columns (9) pass through the mounting plate (8), and linear bearings are provided between the guide columns (9) and the mounting plate (8).

4. A power battery cover plate detection device according to claim 3, characterized in that: Four guide pillars (9) are provided, and are respectively arranged at the four corners of the upper die base (1).

5. The power battery cover plate detection device according to claim 1, characterized in that: The upper end surface of the lower die base (4) is provided with a mounting groove, and the lower die block (5) is embedded in the mounting groove.

6. The power battery cover plate detection device according to claim 1, characterized in that: Limiting blocks (10) are provided on all four sides of the lower module (5), and the limiting blocks (10) are angular structures.

7. The power battery cover plate detection device according to claim 1, characterized in that: The detection unit further comprises a transfer mechanism, the transfer mechanism comprising a mounting seat (11), a motor (12) and a horizontal guide rail (13) being provided on the mounting seat (11), the lower die seat (4) being provided on the horizontal guide rail (13), the motor (12) being in transmission connection with the lower die seat (4) and driving the lower die seat (4) to move back and forth on the horizontal guide rail (13).

8. The power battery cover plate detection device according to claim 1, characterized in that: The upper module (2) is an upper mold sealing plate, and the material of the upper mold sealing plate is PU.

9. The power battery cover plate detection device according to claim 1, characterized in that: The lower die block (5) is a lower die sealing gasket, and the material of the lower die sealing gasket is nitrile rubber.

10. The power battery cover plate detection device according to claim 1, characterized in that: The detection device is provided with two or more detection units, and the detection units are arranged side by side.

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