Air tightness detection device for power battery shell

Abstract

The utility model discloses a power battery shell air tightness detection device, which belongs to the technical field of power batteries, and comprises a rack, the top surface of the rack is fixedly connected with a plurality of support columns, the top ends of the plurality of support columns are provided with a lower detection plate, the lower detection plate is provided with a plurality of placing grooves, the rack is provided with an identification mechanism, and the identification mechanism is provided with a plurality of positioning grooves. And a plurality of first electric push rods are fixedly mounted on the rack. According to the utility model, the plurality of placing grooves are arranged on the lower detection plate, the plurality of placing grooves are used for placing the plurality of battery shells, and the first electric push rod is used for driving the lifting column and the upper detection plate to move downwards, so that the edge frames at the top ends of the plurality of battery shells respectively extend into the plurality of upper clamping grooves at the bottom of the upper detection plate; and the top end of the edge frame is sealed and plugged by using a sealing gasket, so that a function of detecting a plurality of battery shells at one time is realized, and the practicability of the power battery shell air tightness detection device is improved.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and more specifically, to a power battery casing airtightness testing device. Background Technology

[0002] A power battery is a power source that provides power to tools, primarily referring to the batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries are a core component of new energy vehicles and a crucial direction for future energy transition. To ensure the safety of power batteries, airtightness testing is required after the battery casing is manufactured.

[0003] A search revealed that utility model patent CN215931179U discloses a power battery casing airtightness testing device, comprising: a base plate; a support plate with a first through hole, connected to the base plate via a support rod, the lower end of the first through hole being connected to an air source via an air guide pipe, and a pneumatic switch connected to the air guide pipe; a lower template mounted on the support plate, with a protrusion and a second through hole at the top, the second through hole corresponding vertically to the first through hole; an upper template with a through frame for the battery casing to pass through, cooperating with the lower template; at least two driving devices respectively fixed to the left and right ends of the base plate, the driving ends of which are connected to pressure rods for driving the pressure rods to move up and down to fix or loosen the battery casing; and the battery casing fixed on the lower template can be inflated with air via the air source to test its airtightness. Using the above technical solution, the battery casing is automatically fixed via the driving devices and pressure rods, eliminating the need to disassemble screws, making fixing convenient and quick, saving the tester's assembly time, and improving testing efficiency. However, the above patents still have the following shortcomings: they can only test one casing at a time, which is inefficient. In addition, it is not convenient to mark unqualified products and to distinguish them later. Therefore, we propose a power battery casing airtightness testing device. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a power battery casing airtightness testing device.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A power battery casing airtightness testing device includes a frame, with multiple support columns fixedly connected to the top surface of the frame. A lower testing plate is installed at the top of each support column, and multiple placement slots are formed on the lower testing plate. An identification mechanism is provided on the frame. Multiple first electric push rods are fixedly installed on the frame, and the tops of each first electric push rod extend to the top of the frame and are fixedly connected to a lifting column. An upper testing plate is installed on the top surface of each lifting column, and multiple upper slots are provided on the bottom surface of the upper testing plate. A sealing gasket is fixedly connected to the top of the inner cavity of each upper slot. Multiple pneumatic connectors are fixedly installed at the top of the upper testing plate, and the bottom ends of the pneumatic connectors extend to the inner cavity of the upper slots. A battery casing is fitted into the inner cavity of the placement slot. An edge frame is provided on the top of the battery casing, and the top of the edge frame extends to the inner cavity of the upper slot. The top surface of the edge frame and the bottom surface of the sealing gasket are in contact. A control mechanism is provided at the front of the frame.

[0007] As a preferred embodiment of this utility model, the marking mechanism includes a plurality of second electric push rods fixedly mounted on the frame. The top ends of the plurality of second electric push rods extend to the top of the frame and are fixedly connected to internal thread mounting seats. External thread mounting boxes are threadedly mounted on the plurality of internal thread mounting seats. Each of the plurality of external thread mounting boxes is provided with a stamp, and the stamp is located directly below the battery casing.

[0008] As a preferred embodiment of this utility model, the control mechanism includes a mounting plate fixedly connected to the front of the frame, a plurality of control buttons are provided on the mounting plate, and the plurality of control buttons are electrically connected to a plurality of second electric push rods respectively. A control panel is fixedly installed on the front of the mounting plate.

[0009] As a preferred embodiment of this utility model, the top surfaces of the plurality of support columns are provided with first screw holes, the lower detection plate is provided with a plurality of stepped countersunk holes, the inner cavities of the plurality of stepped countersunk holes are fitted with first bolts, and the bottom ends of the plurality of first bolts are respectively threaded into the inner cavities of the first screw holes.

[0010] As a preferred embodiment of this utility model, the top surfaces of the plurality of lifting columns are provided with second screw holes, the upper detection plate is provided with a plurality of mounting holes, and the inner cavities of the plurality of mounting holes are fitted with second bolts, the bottom ends of the second bolts being threaded into the inner cavities of the second screw holes respectively.

[0011] In a preferred embodiment of this utility model, the inner wall of the placement slot is fitted to the side of the battery casing, and the side of the edge frame is fitted to the inner wall of the upper slot.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) In this utility model, multiple placement slots are set on the lower detection plate, and multiple battery casings are placed in the multiple placement slots. In addition, the first electric push rod drives the lifting column and the upper detection plate to move down, so that the edge frames at the top of the multiple battery casings extend into the multiple upper slots at the bottom of the upper detection plate. The top of the edge frames are sealed with sealing gaskets, so as to realize the function of testing multiple battery casings at one time, which improves the practicality of the power battery casing airtightness testing device.

[0014] (2) In this utility model, by using the control button, the second electric push rod, the internal thread mounting seat, the external thread mounting box and the stamp together, when a battery casing with unqualified air tightness is detected, the second electric push rod drives the internal thread mounting seat and the stamp to move upward, so that the stamp prints the unqualified product mark on the bottom surface of the unqualified product, so as to distinguish it in the future, thereby improving the practicality of the power battery casing air tightness detection device. Attached Figure Description

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

[0016] Figure 2 This is an exploded view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the frame structure of this utility model;

[0018] Figure 4 This is a schematic diagram showing the disassembly of the lower detection plate and the battery casing of this utility model;

[0019] Figure 5 This is a bottom view of the detection plate of this utility model;

[0020] Figure 6 This is a structural schematic diagram of the internal thread mounting base and the external thread mounting box of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Frame; 2. Support column; 3. Lower detection plate; 4. Placement slot; 5. Battery casing; 6. Edge frame; 7. First electric push rod; 8. Lifting column; 9. Upper detection plate; 10. Upper slot; 11. Sealing gasket; 12. Pneumatic connector; 13. Marking mechanism; 14. Second electric push rod; 15. Internal thread mounting seat; 16. External thread mounting box; 17. Stamp; 18. Control mechanism; 19. Mounting plate; 20. Control panel; 21. Control button; 22. First screw hole; 23. Stepped countersunk hole; 24. First bolt; 25. Second screw hole; 26. Mounting hole; 27. Second bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-6 A power battery casing airtightness testing device includes a frame 1, with multiple support columns 2 fixedly connected to the top surface of the frame 1. A lower testing plate 3 is installed at the top of the support columns 2, and multiple placement slots 4 are provided on the lower testing plate 3. An marking mechanism 13 is provided on the frame 1. Multiple first electric push rods 7 are fixedly installed on the frame 1, and the tops of the multiple first electric push rods 7 extend to the top of the frame 1 and are fixedly connected to lifting columns 8. An upper testing plate 9 is installed on the top surface of the multiple lifting columns 8, and the bottom surface of the upper testing plate 9... Multiple upper slots 10 are provided, and sealing gaskets 11 are fixedly connected to the top of the inner cavity of each upper slot 10. Multiple pneumatic connectors 12 are fixedly installed on the top of the upper detection plate 9, and the bottom ends of the pneumatic connectors 12 extend into the inner cavity of the upper slot 10. The inner cavity of the placement slot 4 is fitted with a battery casing 5, and an edge frame 6 is provided on the top of the battery casing 5. The top of the edge frame 6 extends into the inner cavity of the upper slot 10, and the top surface of the edge frame 6 is in contact with the bottom surface of the sealing gasket 11. A control mechanism 18 is provided at the front of the frame 1.

[0028] In this embodiment, the pneumatic connector 12 is connected to an air source through an air guide pipe, and a pneumatic switch is provided on the air guide pipe, which is the prior art.

[0029] For details, please refer to Figure 1 , Figure 3 and Figure 6 The marking mechanism 13 includes multiple second electric push rods 14 fixedly mounted on the frame 1. The top ends of the multiple second electric push rods 14 extend to the top of the frame 1 and are fixedly connected to internal thread mounting seats 15. External thread mounting boxes 16 are threadedly mounted on the multiple internal thread mounting seats 15. Each of the multiple external thread mounting boxes 16 is provided with a stamp 17, which is located directly below the battery casing 5.

[0030] In this embodiment, the external threaded mounting box 16 and the stamp 17 can be replaced through the threaded connection between the external threaded mounting box 16 and the internal threaded mounting seat 15. In addition, the top surface of the stamp 17 can be provided with a mark to indicate unqualified products. The stamp 17 can be a sponge core stamp.

[0031] For details, please refer to Figure 1 The control mechanism 18 includes a mounting plate 19 fixedly connected to the front of the frame 1. The mounting plate 19 is provided with a plurality of control buttons 21, which are electrically connected to a plurality of second electric push rods 14 respectively. A control panel 20 is fixedly installed on the front of the mounting plate 19.

[0032] In this embodiment, multiple control buttons 21 are used to control multiple second electric push rods 14 respectively, and multiple first electric push rods 7 and pneumatic switches are controlled through the control panel 20.

[0033] For details, please refer to Figures 2 to 4 The top surface of each of the multiple support columns 2 is provided with a first screw hole 22, and the lower detection plate 3 is provided with multiple stepped countersunk holes 23. The inner cavity of each of the multiple stepped countersunk holes 23 is fitted with a first bolt 24, and the bottom end of each of the multiple first bolts 24 is threaded into the inner cavity of the first screw hole 22.

[0034] In this embodiment, the lower detection plate 3 is installed on the support column 2 through the cooperation of the first screw hole 22, the stepped countersunk hole 23 and the first bolt 24. At the same time, when it is necessary to detect battery casings 5 ​​with different shapes, the lower detection plate 3 can be replaced.

[0035] For details, please refer to Figure 2 , Figure 3 and Figure 5 The top surface of each of the multiple lifting columns 8 is provided with a second screw hole 25, and the upper detection plate 9 is provided with multiple mounting holes 26. The inner cavity of each of the multiple mounting holes 26 is fitted with a second bolt 27, and the bottom end of the second bolt 27 is threaded into the inner cavity of the second screw hole 25.

[0036] In this embodiment, the upper detection plate 9 is installed on the lifting column 8 by the cooperation of the second screw hole 25, the mounting hole 26 and the second bolt 27. At the same time, when it is necessary to detect battery casings 5 ​​with different shapes, the upper detection plate 9 can be replaced.

[0037] For details, please refer to Figure 4 and Figure 5 The inner wall of the placement slot 4 fits against the side of the battery casing 5, and the side of the edge frame 6 fits against the inner wall of the upper card slot 10.

[0038] In this embodiment, the stability of the battery casing 5 placed in the placement slot 4 is ensured, and the stability of the edge frame 6 located in the upper slot 10 is also ensured, thereby ensuring that the sealing gasket 11 can squeeze and seal the top of the edge frame 6.

[0039] Working principle: In use, firstly, place multiple battery casings 5 ​​to be tested into multiple placement slots 4 on the lower detection plate 3, ensuring that the bottom surface of the edge frame 6 contacts the top surface of the lower detection plate 3. Then, activate the first electric push rod 7 to move the lifting column 8 and the upper detection plate 9 downwards, causing the edge frame 6 to extend into the upper slot 10 on the bottom surface of the upper detection plate 9, while simultaneously ensuring that the top surface of the edge frame 6 and the bottom surface of the sealing gasket 11 are tightly fitted. Then, control the multiple pneumatic switches of the peripheral device using the control panel 20, and introduce the gas from the air source into the electric device through the air guide tube and pneumatic connector 12. The inner cavity of the battery casing 5 is subjected to pressure resistance and airtightness tests. The airtightness of the battery casing 5 is tested using an external pressure gauge. After the test is completed, the second electric push rod 14 is controlled independently using the control button 21. The second electric push rod 14 drives the internal thread mounting seat 15 and the stamp 17 to move upward, so that the stamp 17 imprints a defective product mark on the bottom surface of the defective product for subsequent differentiation. In addition, the first electric push rod 7 is activated to drive the lifting column 8 and the upper detection plate 9 to move upward, so that the tested battery casing 5 can be removed and tested on other battery casings 5.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A power battery casing airtightness testing device, comprising a frame (1), characterized in that: The top surface of the frame (1) is fixedly connected to multiple support columns (2), and the top of the multiple support columns (2) is equipped with a lower detection plate (3). The lower detection plate (3) is provided with multiple placement slots (4). The frame (1) is provided with an identification mechanism (13). The frame (1) is fixedly installed with multiple first electric push rods (7). The top of the multiple first electric push rods (7) extends to the top of the frame (1) and is fixedly connected to a lifting column (8). The top surface of the multiple lifting columns (8) is equipped with an upper detection plate (9), and the bottom surface of the upper detection plate (9) is provided with multiple upper slots (10). A sealing gasket (11) is fixedly connected to the top of the inner cavity of each of the upper slots (10). A plurality of pneumatic connectors (12) are fixedly installed on the top of the upper detection plate (9). The bottom ends of the pneumatic connectors (12) extend to the inner cavity of the upper slots (10). A battery shell (5) is fitted inside the inner cavity of the placement slot (4). An edge frame (6) is provided on the top of the battery shell (5). The top of the edge frame (6) extends to the inner cavity of the upper slots (10). The top surface of the edge frame (6) and the bottom surface of the sealing gasket (11) are in contact. A control mechanism (18) is provided at the front of the frame (1).

2. The power battery casing airtightness testing device according to claim 1, characterized in that: The marking mechanism (13) includes a plurality of second electric push rods (14) fixedly mounted on the frame (1). The top ends of the plurality of second electric push rods (14) extend to the top of the frame (1) and are fixedly connected to internal thread mounting seats (15). External thread mounting boxes (16) are threadedly mounted on the plurality of internal thread mounting seats (15). Each of the plurality of external thread mounting boxes (16) is provided with a stamp (17). The stamp (17) is located directly below the battery casing (5).

3. The power battery casing airtightness testing device according to claim 2, characterized in that: The control mechanism (18) includes a mounting plate (19) fixedly connected to the front of the frame (1). The mounting plate (19) is provided with a plurality of control buttons (21). The plurality of control buttons (21) are electrically connected to a plurality of second electric push rods (14). A control panel (20) is fixedly installed on the front of the mounting plate (19).

4. The power battery casing airtightness testing device according to claim 1, characterized in that: The top surface of each of the multiple support columns (2) is provided with a first screw hole (22), and the lower detection plate (3) is provided with multiple stepped countersunk holes (23). The inner cavity of each of the multiple stepped countersunk holes (23) is fitted with a first bolt (24), and the bottom end of each of the multiple first bolts (24) is threaded into the inner cavity of the first screw hole (22).

5. The power battery casing airtightness testing device according to claim 4, characterized in that: The top surface of each of the multiple lifting columns (8) is provided with a second screw hole (25), and the upper detection plate (9) is provided with multiple mounting holes (26). The inner cavity of each of the multiple mounting holes (26) is fitted with a second bolt (27), and the bottom end of the second bolt (27) is threaded into the inner cavity of the second screw hole (25).

6. The power battery casing airtightness testing device according to claim 1, characterized in that: The inner wall of the placement slot (4) is in contact with the side of the battery casing (5), and the side of the edge frame (6) is in contact with the inner wall of the upper slot (10).

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