Cap pressure welding device for lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a cap pressure welding device for a lithium battery, which comprises a support plate, the top end of the support plate is fixedly connected with a limit box, the inside of the limit box is fixedly connected with a pressure box, and the surface of the limit box is fixedly connected with a plurality of water pipes. The ends, close to each other, of the water pipes are fixedly connected with a plurality of water dripping heads, and the ends, close to each other, of the water dripping heads make contact with the surface of the pressing box. Firstly, the lithium battery cap is placed at a proper position of the pressing box, the device is started, the output end of the servo motor drives the lifting rod to move downwards, and the pressing plate moves downwards along with the lifting rod. In the downward moving process of the pressing plate, the pressing plate gradually gets close to the lithium battery cap on the pressing box located under the pressing plate, and after the pressing plate makes contact with the lithium battery cap, the pressing plate is kept for a certain time under the proper pressure according to the set pressure welding parameters, so that the cap and the lithium battery are subjected to pressure welding.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a cap welding device for lithium batteries. Background Technology

[0002] With the widespread application of lithium batteries in electric vehicles, portable electronic devices, and other fields, the requirements for lithium battery production efficiency and quality are constantly increasing. As a key step in the lithium battery production process, improvements in the process and equipment for cap welding are of great significance for enhancing the overall performance and production efficiency of lithium batteries.

[0003] The temperature rises during the welding process of the pressure box, which affects the welding quality and equipment lifespan; and the production efficiency is low, making it difficult to meet the needs of large-scale production. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a cap welding device for lithium batteries.

[0005] This utility model is achieved by the following technical solution: a cap welding device for lithium batteries, including a support plate, a limiting box fixedly connected to the top of the support plate, a pressure box fixedly connected inside the limiting box, a water pipe fixedly connected to the surface of the limiting box, a plurality of water pipes, a drip head fixedly connected to one end of the plurality of water pipes that are close to each other, a plurality of drip heads, and one end of the plurality of drip heads that are close to each other is in contact with the surface of the pressure box.

[0006] The above technical solution delivers cooling water to the drip head via water pipes, providing a water source for cooling the pressure chamber surface and ensuring the normal operation of the cooling system. The drip head evenly drips the water delivered by the water pipes onto the pressure chamber surface, allowing the pressure chamber surface to be cooled uniformly and preventing deformation or damage to the pressure chamber due to excessively high local temperatures. Because the drip head can evenly distribute water on the pressure chamber surface, it increases the contact area between the water and the pressure chamber surface, improves the cooling efficiency, and allows the pressure chamber to recover to the appropriate working temperature more quickly.

[0007] As a further improvement to the above solution, the top of the support plate is fixedly connected to the bottom of the fixing block, and two fixing blocks are provided. The tops of the two fixing blocks are fixedly connected to the bottom of the support column, and two support columns are provided.

[0008] Through the above technical solution, the fixing block connects the support plate and the support column, playing the role of transmitting force and providing support, so that the support column can stand stably on the support plate, providing stable support for the components to be installed later.

[0009] As a further improvement to the above solution, the top ends of the two support columns are fixedly connected to the bottom end of the fixing plate, the top end of the fixing plate is fixedly connected to the bottom end of the servo motor, the top end of the fixing plate is fixedly connected to the bottom end of the protective box, and the servo motor is installed inside the protective box.

[0010] Through the above technical solutions, the protective box can play a certain safety protection role during motor operation, preventing operators from accidentally touching the motor or being injured by flying debris generated by the motor due to malfunction.

[0011] As a further improvement to the above solution, the bottom end of the fixed plate is provided with a slot, a lifting rod is provided inside the slot, a pressure plate is provided inside the slot, the output end of the bottom end of the servo motor is connected to the top end of the lifting rod through the inside of the fixed plate, the bottom end of the lifting rod is fixedly connected to the top end of the pressure plate, and a pressure box is provided directly below the pressure plate.

[0012] Through the above technical solution, the lifting rod transmits the power of the servo motor to the pressure plate, enabling the pressure plate to move up and down under the drive of the lifting rod, thereby realizing the pressure welding operation of the lithium battery cap. The surface of the pressure plate is usually specially treated, with good flatness and wear resistance, which can ensure full contact with the cap surface during the pressure welding process, so that the pressure is evenly distributed, thereby improving the quality and stability of the pressure welding.

[0013] As a further improvement to the above solution, the front end of the limiting box is fixedly connected to the rear end of the water outlet pipe, and the top end of the water outlet pipe is drivenly connected to the bottom end of the water outlet valve.

[0014] Through the above technical solution, the water outlet pipe will discharge the cooled water in a timely manner to prevent excessive water accumulation in the limit box, which would affect the normal operation of the device. The water outlet valve can adjust the drainage volume of the water outlet pipe according to actual needs to control the water level in the limit box and ensure the normal operation of the cooling system.

[0015] As a further improvement to the above solution, there is a gap between the inner wall of the limiting box and the surface of the pressure box.

[0016] The above technical solution creates a gap between the limiting box and the pressure box, which facilitates water storage to cool the surface of the pressure box. This allows the pressure box to be kept within a suitable temperature range during operation, extending its service life and also helping to ensure the quality of the pressure welding.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention utilizes a servo motor to drive a lifting rod, which in turn moves a pressure plate to perform pressure welding. The servo motor precisely controls the lifting rod's movement, ensuring the pressure plate accurately welds the lithium battery cap located on the pressure box. This precise control guarantees accurate pressure and position during welding, improving welding quality and reducing welding defects caused by uneven pressure or positional deviations.

[0019] The support plate, fixing block, support column, and fixing plate together constitute a stable support structure. They provide solid support for components such as the servo motor, pressure plate, limit box, and pressure box, ensuring that the entire device will not shake or deform during the pressure welding process, thus guaranteeing the stability and accuracy of the pressure welding operation;

[0020] This invention utilizes a cooling system composed of several water pipes and drip heads to effectively cool the surface of the pressure chamber. During the pressure welding process, the pressure chamber may experience a temperature rise due to the welding heat; the water dripping from the drip heads carries away this heat, preventing the pressure chamber from overheating. Furthermore, the gap between the limiting box and the pressure chamber facilitates water retention, resulting in better cooling and helping to maintain the pressure chamber at a suitable operating temperature, extending its service life and ensuring the quality of the pressure welding.

[0021] The outlet pipe and outlet valve facilitate the discharge of cooled water. Once the water on the surface of the pressure tank has completed its cooling process, it can be discharged promptly through the outlet pipe to prevent excessive water accumulation in the limit box, which could affect the normal operation of the device. It also facilitates the treatment or recycling of the discharged water. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the left end structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0026] Explanation of key symbols:

[0027] 1. Support plate; 2. Fixing block; 3. Support column; 4. Fixing plate; 5. Servo motor; 6. Protective box; 7. Groove; 8. Lifting rod; 9. Pressure plate; 10. Limit box; 11. Pressure box; 12. Water pipe; 13. Drip head; 14. Water outlet pipe; 15. Water outlet valve. Detailed Implementation

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] Example:

[0030] Please combine Figure 1-4 This embodiment of a cap welding device for lithium batteries includes a support plate 1. A limiting box 10 is fixedly connected to the top of the support plate 1, and a pressure box 11 is fixedly connected inside the limiting box 10. A water pipe 12 is fixedly connected to the surface of the limiting box 10. Several water pipes 12 are provided, and a drip head 13 is fixedly connected to one end of each water pipe 12 that is close to each other. Several drip heads 13 are provided, and one end of each drip head 13 that is close to each other is in contact with the surface of the pressure box 11.

[0031] The top of the support plate 1 is fixedly connected to the bottom of the fixing block 2. There are two fixing blocks 2. The tops of the two fixing blocks 2 are fixedly connected to the bottom of the support column 3. There are two support columns 3.

[0032] The tops of the two support columns 3 are fixedly connected to the bottom of the fixing plate 4. The top of the fixing plate 4 is fixedly connected to the bottom of the servo motor 5. The top of the fixing plate 4 is fixedly connected to the bottom of the protective box 6. The servo motor 5 is installed inside the protective box 6.

[0033] The bottom end of the fixed plate 4 has a slot 7, inside which a lifting rod 8 is installed, and inside which a pressure plate 9 is installed.

[0034] The output end of the servo motor 5 is connected to the top of the lifting rod 8 through the inside of the fixing plate 4. The bottom of the lifting rod 8 is fixedly connected to the top of the pressure plate 9. A pressure box 11 is set directly below the pressure plate 9.

[0035] The front end of the limit box 10 is fixedly connected to the rear end of the water outlet pipe 14, and the top end of the water outlet pipe 14 is connected to the bottom end of the water outlet valve 15 via a transmission connection.

[0036] There is a gap between the inner wall of the limiting box 10 and the surface of the pressure box 11.

[0037] The implementation principle of the cap welding device for lithium batteries in this embodiment is as follows: First, the lithium battery cap is placed in a suitable position on the pressure box 11. Then, the device is started, and the servo motor 5 starts working. The output end of the servo motor 5 drives the lifting rod 8 to move downward. Since the bottom end of the lifting rod 8 is fixedly connected to the top end of the pressure plate 9, the pressure plate 9 also moves downward. During the downward movement, the pressure plate 9 gradually approaches the lithium battery cap on the pressure box 11 directly below it. When the pressure plate 9 contacts the lithium battery cap, pressure is continued to be applied. According to the set welding parameters, the pressure is maintained for a certain period of time to weld the cap to the lithium battery. During this process, the servo motor 5 precisely controls the pressure and pressing time of the pressure plate 9 to ensure the quality of the welding. During the welding process, the water source of the water pipe 12 is turned on at the same time, and the water flows through the water pipe 12 to the drip head 13, which drips water onto the surface of the pressure box 11. Because water has a high specific heat capacity, it can absorb heat from the surface of the pressure chamber 11, thereby lowering the temperature of the pressure chamber 11. Some of the water dripping onto the surface of the pressure chamber 11 evaporates, while some flows into the gap between the limiting box 10 and the pressure chamber 11. When the water in the gap reaches a certain amount, the water outlet valve 15 is opened, and the water is discharged through the water outlet pipe 14, forming a simple water circulation process that continuously removes heat from the surface of the pressure chamber 11, maintaining the temperature of the pressure chamber 11 stable.

[0038] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A cap press bonding apparatus for a lithium battery, characterized by, Includes a support plate (1), the top of which is fixedly connected to a limiting box (10), a pressure box (11) is fixedly connected inside the limiting box (10), and a water pipe (12) is fixedly connected to the surface of the limiting box (10). Several water pipes (12) are provided, and a drip head (13) is fixedly connected to one end of each water pipe (12) that is close to each other. Several drip heads (13) are provided, and one end of each drip head (13) that is close to each other is in contact with the surface of the pressure box (11).

2. A cap seam welding apparatus for lithium batteries as claimed in claim 1, wherein: The top of the support plate (1) is fixedly connected to the bottom of the fixing block (2). There are two fixing blocks (2). The tops of the two fixing blocks (2) are fixedly connected to the bottom of the support column (3). There are two support columns (3).

3. A cap press bonding apparatus for lithium batteries as defined in claim 2, wherein: The top ends of the two support columns (3) are fixedly connected to the bottom end of the fixing plate (4), the top end of the fixing plate (4) is fixedly connected to the bottom end of the servo motor (5), the top end of the fixing plate (4) is fixedly connected to the bottom end of the protective box (6), and the servo motor (5) is installed inside the protective box (6).

4. A cap press bonding apparatus for lithium batteries as defined in claim 3, wherein: The bottom end of the fixing plate (4) is provided with a slot (7), a lifting rod (8) is provided inside the slot (7), and a pressure plate (9) is provided inside the slot (7).

5. A cap press bonding apparatus for lithium batteries as defined in claim 3, wherein: The output end of the servo motor (5) is connected to the top of the lifting rod (8) through the inside of the fixing plate (4). The bottom of the lifting rod (8) is fixedly connected to the top of the pressure plate (9). A pressure box (11) is provided directly below the pressure plate (9).

6. A cap seam welding apparatus for lithium batteries as defined in claim 1, wherein: The front end of the limiting box (10) is fixedly connected to the rear end of the water outlet pipe (14), and the top end of the water outlet pipe (14) is connected to the bottom end of the water outlet valve (15) via a transmission connection.

7. A cap seam welding apparatus for lithium batteries as defined in claim 1, wherein: There is a gap between the inner wall of the limiting box (10) and the surface of the pressure box (11).

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