Waterproof power battery shell structure

Abstract

The utility model discloses a waterproof power battery shell structure, and particularly relates to the technical field of power battery shells, the waterproof power battery shell structure comprises a power battery shell, the top of the power battery shell is fixedly connected with a first connecting frame, the periphery of the first connecting frame is provided with a groove, and the top of the power battery shell is provided with a shell cover; and the bottom of the shell cover is fixedly connected with a second connecting frame. According to the utility model, through the arrangement of the first sealing ring and the second sealing ring, double waterproof barriers can be realized, the sealing performance of the top of the shell is greatly improved, the expansion pipe is expanded by injecting gas into the expansion pipe, so that the expansion pipe is tightly attached to the wall body of the inner cavity of the groove, and the sealing performance is enhanced by utilizing air pressure; the sealing structure is simple in structure, the sealing strength can be further enhanced, the sealing structure is particularly suitable for meeting the waterproof requirement in an extremely humid or soaking environment, and the multiple sealing structure design of the double sealing rings, the expansion pipe and the waterproof ring forms an all-dimensional and multi-layer waterproof system.

Description

Technical Field

[0001] This utility model relates to the field of power battery housing technology, and more specifically, to a waterproof power battery housing structure. Background Technology

[0002] In the current context of the rapid development of the new energy industry, the performance and safety of power batteries, as core energy storage components, are of paramount importance. In practical applications, power batteries often face water environments such as humidity, rain, and even immersion. For example, when new energy vehicles drive in the rain or pass through flooded sections of road, the power batteries will be affected by rainwater. The power batteries of electric ships are in a high-humidity marine environment for a long time. When energy storage power stations are operating outdoors, they may also encounter severe weather such as rainstorms. If the waterproof performance of the power battery casing is not good, once water seeps into the battery, it will cause internal short circuits, electrode corrosion, significantly reduce the battery's service life, and even cause serious safety accidents such as fires and explosions.

[0003] Currently, most existing power battery casings achieve waterproofing through simple sealing strips. However, these sealing strips are prone to aging and deformation due to factors such as temperature changes and mechanical vibrations during long-term use, leading to seal failure. Furthermore, with a single sealing method, when the battery is in a high-humidity or immersion environment, the infiltration of moisture may cause serious problems such as internal short circuits and electrode corrosion, and may even lead to safety accidents such as fires or explosions. Therefore, a waterproof power battery casing structure is proposed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a waterproof power battery casing structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof power battery housing structure, including a power battery housing, a first connecting frame fixedly connected to the top of the power battery housing, grooves formed around the perimeter of the first connecting frame, a cover provided on the top of the power battery housing, a second connecting frame fixedly connected to the bottom of the cover, and an expansion tube fixedly connected to the center of the inner cavity of the second connecting frame. By injecting gas into the expansion tube, the expansion tube can collide and thus tightly fit the inner wall of the groove, further enhancing the sealing strength. This is especially suitable for waterproofing requirements in extremely humid or immersion environments.

[0006] A second sealing ring is embedded in the top of the power battery casing, and a first sealing ring is embedded in the top of the first connecting frame. The first and second sealing rings form a double waterproof barrier, greatly improving the sealing performance of the top of the casing. An air inlet pipe is connected to the top of the inner cavity of the expansion tube, and a sealing plug is embedded in the top opening of the air inlet pipe. A waterproof ring is inserted in the middle of the casing cover. Heat dissipation cavities are formed around the perimeter and bottom of the power battery casing. A heat dissipation toothed plate is fixedly connected to the middle of the heat dissipation cavity. The opening of the air inlet pipe can be sealed by the sealing plug. The waterproof ring facilitates the extension of the wires and can tightly wrap the wires through its own structural deformation, preventing moisture from entering the battery along the wires. This solves the waterproofing problem at the wire protrusion point. The heat dissipation cavity and heat dissipation toothed plate increase the heat dissipation area and achieve efficient heat dissipation. At the same time, the heat dissipation cavity design around the perimeter and bottom forms a multi-directional heat dissipation channel, which accelerates the air circulation speed and further improves the heat dissipation effect.

[0007] Preferably, the power battery housing is symmetrically fixedly connected to the four sides of the center, and fastening bolts are symmetrically inserted around the top of the cover. One end of the fastening bolt extends into the inner cavity of the fixing post and is threadedly connected to the inner cavity of the fixing post. This facilitates the installation of the cover on the top of the power battery housing and improves the firmness of the connection. Under vibration conditions during vehicle driving or equipment operation, it can prevent the cover from loosening and ensure the stability of the sealing structure.

[0008] Preferably, the size of the heat dissipation toothed plate is the same as the inner depth of the heat dissipation cavity. The heat dissipation toothed plate is electrically connected to the heat-conducting plate inside the power battery casing. When the battery generates heat, the heat is transferred to the heat dissipation toothed plate through the heat-conducting plate, and then exchanged with the outside air through the heat dissipation cavity to achieve efficient heat dissipation.

[0009] Preferably, the second sealing ring is disposed around the first connecting frame, the second connecting frame is disposed outside the first connecting frame, and one side wall of the second connecting frame is tightly fitted with the wall of the second sealing ring, thereby further improving the sealing strength and effectively preventing moisture from seeping in.

[0010] Preferably, the waterproof ring has an "H" shaped cross-section and is used for the wire to extend out. One side wall of the expansion tube is made of rubber. The waterproof ring can ensure that the wire can pass through normally while tightly wrapping the wire through its own structural deformation, preventing moisture from entering the battery along the wire.

[0011] Preferably, the expansion tube is adapted to the groove, the top wall of the inner cavity of the groove is set as an inclined surface, one side wall of the expansion tube is tightly fitted with the inner cavity wall of the groove, and the expansion tube can be expanded and tightly fitted with the inner wall of the groove by means of the provided expansion tube, thereby enhancing the sealing performance by using air pressure, which is especially suitable for waterproofing needs in extremely humid or immersion environments.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model firstly achieves a double waterproof barrier through the setting of a first sealing ring and a second sealing ring, which greatly improves the sealing performance of the top of the shell. By injecting gas into the expansion tube, the expansion tube expands and thus tightly fits the inner wall of the groove. The air pressure enhances the sealing performance and further strengthens the sealing strength. It is especially suitable for waterproofing needs in extremely humid or immersion environments. The multi-sealing structure design of the double sealing ring, expansion tube and waterproof ring forms a comprehensive and multi-layered waterproof system.

[0014] 2. This utility model also facilitates the extension of the wire by using a waterproof ring, and can tightly wrap the wire through its own structural deformation to prevent moisture from entering the battery along the wire, thus solving the waterproof problem at the wire protrusion point. In addition, the heat dissipation cavity and heat dissipation tooth plate can increase the heat dissipation area and achieve efficient heat dissipation. At the same time, the heat dissipation cavity design on the four sides and bottom forms a multi-directional heat dissipation channel, which accelerates the air circulation speed and further improves the heat dissipation effect.

[0015] In summary, through the interaction of the above-mentioned multiple functions, a comprehensive and multi-layered waterproof system is formed by the multi-sealing structure design of double sealing rings, expansion tubes, and waterproof rings. This system can also improve heat dissipation, prevent liquid from entering through the wire outlet, and enhance waterproof strength. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0018] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the split cross-sectional structure of this utility model.

[0020] The attached figures are labeled as follows: 1. Power battery casing; 2. First connecting frame; 3. Groove; 4. First sealing ring; 5. Second sealing ring; 6. Shell cover; 7. Second connecting frame; 8. Expansion tube; 9. Air inlet pipe; 10. Sealing plug; 11. Waterproof ring; 12. Fixing post; 13. Fastening bolt; 14. Heat dissipation cavity; 15. Heat dissipation toothed plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figure 1-4 The waterproof power battery housing structure shown includes a power battery housing 1. A first connecting frame 2 is fixedly connected to the top of the power battery housing 1. The first connecting frame 2 has grooves 3 around its perimeter. A cover 6 is provided on the top of the power battery housing 1. A second connecting frame 7 is fixedly connected to the bottom of the cover 6. An expansion tube 8 is fixedly connected to the center of the inner cavity of the second connecting frame 7. The expansion tube 8 corresponds to the groove 3. By injecting gas into the expansion tube 8, the expansion tube 8 will collide and thus tightly fit the inner wall of the groove 3, which can further enhance the sealing strength. It is especially suitable for waterproofing needs in extremely humid or immersion environments.

[0023] A second sealing ring 5 is embedded in the top of the power battery casing 1, and a first sealing ring 4 is embedded in the top of the first connecting frame 2. The first sealing ring 4 and the second sealing ring 5 form a double waterproof barrier, which greatly improves the sealing performance of the top of the casing. An air inlet pipe 9 is connected to the top of the inner cavity of the expansion tube 8. A sealing plug 10 is embedded in the top opening of the air inlet pipe 9. A waterproof ring 11 is inserted in the middle of the casing cover 6. Heat dissipation cavities 14 are opened around the perimeter and bottom of the power battery casing 1. A heat dissipation toothed plate 15 is fixedly connected to the middle of the heat dissipation cavity 14. The opening of the air inlet pipe 9 can be sealed by the sealing plug 10. The waterproof ring 11 facilitates the extension of the wire and can tightly wrap the wire through its own structural deformation to prevent moisture from entering the battery along the wire. This solves the waterproof problem of the wire protrusion part. The heat dissipation cavity 14 and the heat dissipation toothed plate 15 can increase the heat dissipation area and achieve efficient heat dissipation. At the same time, the heat dissipation cavity design around the perimeter and bottom forms a multi-directional heat dissipation channel, which accelerates the air circulation speed and further improves the heat dissipation effect.

[0024] As attached Figure 1-4As shown, fixing posts 12 are symmetrically fixed around the center of the power battery housing 1. Fastening bolts 13 are symmetrically inserted around the top of the housing cover 6. One end of the fastening bolt 13 extends into the inner cavity of the fixing post 12 and is threadedly connected to the inner cavity of the fixing post 12. The size of the heat dissipation toothed plate 15 is the same as the inner cavity depth of the heat dissipation cavity 14. The heat dissipation toothed plate 15 is electrically connected to the heat-conducting plate of the inner cavity of the power battery housing 1. The second sealing ring 5 is set around the first connecting frame 2. The second connecting frame 7 is set outside the first connecting frame 2. One side wall of the second connecting frame 7 is tightly fitted with the wall of the second sealing ring 5. The cross-sectional shape of the waterproof ring 11 is set as "H". The waterproof ring 11 is used for wire extension. One side wall of the expansion tube 8 is made of rubber. The expansion tube 8 is adapted to the groove 3. The top wall of the inner cavity of the groove 3 is set as a slope. One side wall of the expansion tube 8 is... The inner wall of the groove 3 fits tightly, facilitating the installation of the cover 6 on top of the power battery housing 1 and improving the connection's firmness. In the vibration environment during vehicle operation or equipment operation, it can prevent the cover from loosening and ensure the stability of the sealing structure. When the battery generates heat, the heat is transferred to the heat dissipation toothed plate 15 through the heat conduction plate, and then exchanged with the outside air through the heat dissipation cavity 14 to achieve efficient heat dissipation. The second sealing ring 5 further improves the sealing strength and effectively prevents moisture from seeping in. The waterproof ring 11 can tightly wrap the wires through its own structural deformation while ensuring that the wires can pass through normally, preventing moisture from entering the battery along the wires. The expansion tube 8 can expand and fit tightly against the inner wall of the groove 3, using air pressure to enhance the sealing performance, which is especially suitable for waterproofing needs in extremely humid or immersion environments.

[0025] The working principle of this utility model is as follows: When in use, the cover 6 is fixedly installed on the top of the power battery housing 1 by fastening the bolt 13 and fixing the inner cavity of the fixing column 12, thereby squeezing and fixing the first sealing ring 4 and the second sealing ring 5. The combination of the first sealing ring 4 and the second sealing ring 5 can achieve a double waterproof barrier, which greatly improves the sealing performance of the top of the housing. At this time, the expansion tube 8 is located inside the groove 3.

[0026] Then, gas is injected into the expansion tube 8 through the sealing plug 10 and the air inlet pipe 9, causing the expansion tube 8 to expand. At this time, the wall of the expansion tube 8 fits with the wall of the groove 3, further enhancing the sealing effect, thereby realizing the use of air pressure to enhance the sealing performance, which is especially suitable for waterproofing needs in extremely humid or immersion environments.

[0027] When the battery generates heat, the heat is transferred to the heat dissipation toothed plate 15 through the heat conduction plate, and then exchanged with the outside air through the heat dissipation cavity 14 to achieve efficient heat dissipation. At the same time, the heat dissipation cavity design around the perimeter and bottom forms a multi-directional heat dissipation channel, which accelerates the air circulation speed and further improves the heat dissipation effect. The waterproof ring 11 can ensure that the wires can pass through normally, while its own structural deformation tightly wraps the wires to prevent moisture from entering the battery along the wires.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof power battery case structure, comprising a power battery case (1), characterized in that: The top of the power battery shell (1) is fixedly connected with a first connecting frame (2), a groove (3) is formed in the periphery of the first connecting frame (2), the top of the power battery shell (1) is provided with a shell cover (6), the bottom of the shell cover (6) is fixedly connected with a second connecting frame (7), and the inner cavity of the second connecting frame (7) is fixedly connected with an expansion pipe (8) in the middle. The top of the power battery shell (1) is embedded with a second sealing ring (5), the top of the first connecting frame (2) is embedded with a first sealing ring (4), the inner cavity of the expansion pipe (8) is connected with an air inlet pipe (9) at the top, the top opening of the air inlet pipe (9) is embedded with a plugging plug (10), the middle of the shell cover (6) is inserted with a waterproof ring (11), the periphery and the bottom of the power battery shell (1) are provided with a heat dissipation cavity (14), and the middle of the heat dissipation cavity (14) is fixedly connected with a heat dissipation toothed plate (15).

2. The waterproof power battery shell structure according to claim 1, characterized in that: The middle of the power battery shell (1) is fixedly connected with a fixed column (12) in a symmetrical manner, the top of the shell cover (6) is inserted with a fastening bolt (13) in a symmetrical manner, and one end of the fastening bolt (13) extends into the inner cavity of the fixed column (12) and is threadedly connected with the inner cavity of the fixed column (12).

3. The waterproof power battery shell structure according to claim 1, characterized in that: The size of the heat dissipation toothed plate (15) is the same as the inner cavity depth of the heat dissipation cavity (14), and the heat dissipation toothed plate (15) is electrically connected with the heat conduction plate in the inner cavity of the power battery shell (1).

4. The waterproof power battery shell structure according to claim 1, characterized in that: The second sealing ring (5) is arranged on the periphery of the first connecting frame (2), the second connecting frame (7) is arranged outside the first connecting frame (2), and the side wall of the second connecting frame (7) is tightly attached to the wall of the second sealing ring (5).

5. The waterproof power battery shell structure according to claim 1, characterized in that: The cross-sectional shape of the waterproof ring (11) is "H" shape, the waterproof ring (11) is used for wire extension, and the side wall of the expansion pipe (8) is made of rubber material.

6. The waterproof power battery shell structure according to claim 1, characterized in that: The expansion pipe (8) is matched with the groove (3), the inner cavity top wall of the groove (3) is provided with an inclined surface, and the side wall of the expansion pipe (8) is tightly attached to the inner cavity wall of the groove (3).

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