A novel sealing structure for a battery case

Abstract

The application relates to the technical field of battery boxes, in particular to a novel sealing structure for a battery box, which comprises a box body and a box cover, a first mounting frame is fixedly sleeved on the surface of the box body, a rectangular groove is formed in the lower surface of the box cover, an insertion groove is formed in the upper surface of the first mounting frame, and a second mounting frame is fixedly sleeved on the surface of the box cover; a first sealing gasket is bonded to the lower surface of the second mounting frame, and a second sealing gasket is bonded to the groove bottom of the insertion groove. The first sealing gasket can prevent water from entering the insertion groove from the outside, the second sealing gasket can prevent water from passing through the insertion groove, a U-shaped gap is formed between the bottom of the box cover and the insertion groove, the difficulty of water passing through the insertion groove is increased, and even if water passes through the insertion groove, the water cannot enter the box body due to the height difference between the water passing through the insertion groove and the top of the box body, and the sealing property is improved again.

Description

Technical Field

[0001] This invention relates to the field of battery box technology, and in particular to a novel sealing structure for battery boxes. Background Technology

[0002] With the development of electric vehicles and other new energy equipment, the battery box, as the power source of electric vehicles, is a core component. The safety of the battery box directly affects the safety of the entire vehicle. Water ingress can cause short circuits, so the sealing performance of the battery box becomes crucial and must be strictly sealed to prevent water ingress.

[0003] In existing battery boxes, the box body and the cover are mostly fixed together with screws and nuts. The seal between the cover and the box body is achieved by adding a sealing gasket at the contact surface between the box body and the cover. After long-term use, the sealing gasket may deform or warp due to factors such as temperature changes and vibration, resulting in gaps. This allows moisture, dust and other impurities to easily enter the battery box, affecting the battery's performance and lifespan, and may even cause safety problems. Summary of the Invention

[0004] The purpose of this invention is to address the following shortcomings in the existing technology: the existing battery box body and cover are mostly fixedly connected by screws and nuts, and the seal between the cover and the body is achieved by adding a sealing gasket at the contact surface between the body and the cover. After long-term use, the sealing gasket may deform or warp due to factors such as temperature changes and vibration, resulting in gaps. This allows moisture, dust and other impurities to easily enter the battery box, affecting the battery's performance and lifespan, and may even cause safety problems. Therefore, this invention proposes a novel sealing structure for battery boxes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel sealing structure for a battery box includes a box body and a box cover. A first mounting frame is fixedly sleeved on the surface of the box body. A rectangular groove is formed on the lower surface of the box cover. A slot for inserting the bottom of the box cover is formed on the upper surface of the first mounting frame. A second mounting frame is fixedly sleeved on the surface of the box cover. A plurality of through holes are formed on the surface of the second mounting frame. Locking screws are inserted into the through holes. A plurality of threaded grooves are formed on the surface of the first mounting frame for threaded installation of multiple locking screws.

[0007] A first sealing gasket is adhered to the lower surface of the second mounting frame, and a second sealing gasket is adhered to the bottom of the slot. Both the first and second sealing gaskets are made of rubber.

[0008] Preferably, the slot has multiple T-shaped mounting openings vertically at its bottom. A rod is rotatably mounted in each mounting opening. A mounting block is fixedly mounted at the bottom of the rod. The mounting block is connected to the wall of the mounting opening through an elastic component. The lower surface of the cover has multiple insertion slots vertically provided for inserting multiple rods.

[0009] Preferably, the elastic component includes a torsion spring sleeved on the insertion rod, with both ends of the torsion spring fixedly connected to the upper surface of the mounting block and the top wall of the mounting opening, respectively.

[0010] Preferably, an anti-detachment block is fixedly installed on the surface of the insertion rod, a vertical groove is vertically formed in the wall of the insertion groove, and an annular limiting opening is formed in the wall of the insertion groove that communicates with the vertical groove.

[0011] Preferably, an anti-slip pad is adhered to the lower surface of the mounting block, and the lower surface of the anti-slip pad is at the same horizontal line as the lower surface of the first mounting frame.

[0012] Preferably, the surface of the box has a rectangular opening, and the rectangular opening contains a sealing component to improve the sealing.

[0013] Preferably, the encryption component includes a sealed airbag fixedly installed in a rectangular opening, an air storage groove is provided on the lower surface of the box, a piston block is slidably sealed in the air storage groove, the piston block is connected to the groove wall of the air storage groove through multiple sets of telescopic components, and multiple vents are vertically provided on the top wall of the air storage groove, all of which are connected to the rectangular opening, and all of the multiple vents are connected to the inside of the sealed airbag.

[0014] Preferably, the telescopic component includes a telescopic spring, the two ends of which are fixedly connected to the top of the piston block and the top wall of the gas storage tank, respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the lid covers the top of the box, the bottom of the lid is inserted into the slot, and the second sealing gasket is tightly abutted against the bottom of the lid, while the first sealing gasket is tightly abutted against the upper surface of the first mounting frame. The first sealing gasket can prevent water from entering the slot from the outside, while the second sealing gasket can prevent water from passing through the slot, achieving a double sealing effect. At the same time, a U-shaped gap is formed between the bottom of the lid and the slot, increasing the difficulty for water to pass through the slot. Even if water passes through the slot, because the bottom level of the lid is lower than the top level of the box, there is a certain height difference between the water passing through the slot and the top of the box, so it cannot enter the box, further improving the sealing performance.

[0017] 2. The combination of anti-detachment blocks, vertical grooves and limiting openings can help fix the lid and the body of the box. Even if the locking screws rotate due to temperature changes, vibration and other factors, the lock between the lid and the body will not be released and will remain tightly pressed together, thus improving the sealing performance.

[0018] 3. At the same time, the cooperation between the anti-detachment block and the limiting port can prevent unauthorized personnel from opening the lid and exposing the box to the outside, thus playing a certain protective and safety role. Only operators familiar with this design can control the separation of the box and the lid.

[0019] 4. After the cover and body are installed, place the body on the ground. The piston block will move upward under pressure, thereby filling the sealed airbag with gas from the gas storage tank. The sealed airbag will then expand and deform, sealing the space between the cover and body, further increasing the difficulty for water to enter the body and improving the overall sealing of the battery box. Attached Figure Description

[0020] Figure 1 This is a frontal three-dimensional split view of a novel sealing structure for a battery box proposed in this invention;

[0021] Figure 2 This is a top-view perspective view of a novel sealing structure for a battery box proposed in this invention.

[0022] Figure 3 This is a bottom-view perspective view of a novel sealing structure for a battery box proposed in this invention.

[0023] Figure 4 This is a partial three-dimensional structural diagram of the casing in a novel sealing structure for a battery box proposed in this invention.

[0024] Figure 5 This is a partial three-dimensional structural diagram of the second mounting frame in a novel sealing structure for a battery box proposed in this invention.

[0025] Figure 6 This is a partial three-dimensional split-structure diagram of the first mounting frame in a novel sealing structure for a battery box proposed in this invention.

[0026] Figure 7 This is a partial three-dimensional structural diagram of the piston block in a novel sealing structure for a battery box proposed in this invention.

[0027] Figure 8 This is a schematic diagram of a partial three-dimensional cross-sectional structure of the box body and the box cover in a novel sealing structure for a battery box proposed in this invention;

[0028] Figure 9 This is a schematic diagram of a partial three-dimensional cross-sectional structure of the cover and the first mounting frame in a novel sealing structure for a battery box proposed in this invention.

[0029] Figure 10 This is a schematic diagram of the cross-sectional structure of the cover and the body of the battery box after installation, in a novel sealing structure for a battery box proposed in this invention.

[0030] Figure 11 for Figure 1 Enlarged structural diagram at point A in the middle;

[0031] Figure 12 for Figure 2 Enlarged structural diagram at point B;

[0032] Figure 13 for Figure 8 Enlarged structural diagram at point C;

[0033] Figure 14 for Figure 9 Enlarged structural diagram at point D;

[0034] Figure 15 for Figure 10 Enlarged structural diagram at point E in the middle.

[0035] In the diagram: 1. Box body, 2. Box cover, 3. First mounting frame, 4. Rectangular groove, 5. Slot, 6. Second mounting frame, 7. Locking screw, 8. Threaded groove, 9. First sealing gasket, 10. Second sealing gasket, 11. Mounting port, 12. Insert rod, 13. Mounting block, 14. Insertion groove, 15. Torsion spring, 16. Anti-detachment block, 17. Vertical groove, 18. Restriction port, 19. Rectangular port, 20. Sealing airbag, 21. Anti-slip pad, 22. Air storage tank, 23. Piston block, 24. Vent, 25. Telescopic spring. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Reference Figures 1-15 A novel sealing structure for a battery box includes a box body 1 and a box cover 2. A first mounting frame 3 is fixedly sleeved on the surface of the box body 1. A rectangular groove 4 is formed on the lower surface of the box cover 2. A slot 5 for inserting the bottom of the box cover 2 is formed on the upper surface of the first mounting frame 3. A second mounting frame 6 is fixedly sleeved on the surface of the box cover 2. Multiple through holes are formed on the surface of the second mounting frame 6, and locking screws 7 are inserted into the through holes. Multiple threaded grooves 8 are formed on the surface of the first mounting frame 3 for threaded installation of multiple locking screws 7.

[0038] The lower surface of the second mounting frame 6 is bonded with a first sealing gasket 9, and the bottom of the slot 5 is bonded with a second sealing gasket 10. Both the first sealing gasket 9 and the second sealing gasket 10 are made of rubber.

[0039] When the control box cover 2 is installed with the box body 1, first insert the bottom of the cover 2 into the slot 5. At this time, the multiple through holes will correspond to the positions of the multiple threaded grooves 8, and the top of the rectangular groove 4 will abut against the upper surface of the box body 1. The first sealing gasket 9 will abut against the upper surface of the first mounting frame 3, and the second sealing gasket 10 will abut against the bottom of the cover 2. The first sealing gasket 9 can prevent water from entering the slot 5 from the outside, while the second sealing gasket 10 can prevent water from passing through the slot 5, achieving a double sealing effect. At the same time, a U-shaped gap is formed between the bottom of the cover 2 and the slot 5, increasing the difficulty for water to pass through the slot 5. Even if water passes through the slot 5, since the bottom horizontal plane of the cover 2 is lower than the top horizontal plane of the box body 1, there is a certain height difference between the water passing through the slot 5 and the top of the box body 1, so it cannot enter the box body 1, further improving the sealing performance.

[0040] The bottom of the slot 5 has multiple T-shaped mounting openings 11 vertically. Insert rods 12 are rotatably installed in the mounting openings 11. Mounting blocks 13 are fixedly installed at the bottom of the insert rods 12. The mounting blocks 13 are connected to the wall of the mounting openings 11 through elastic components. The elastic components include torsion springs 15 sleeved on the insert rods 12. The two ends of the torsion springs 15 are fixedly connected to the upper surface of the mounting blocks 13 and the top wall of the mounting openings 11, respectively. The lower surface of the cover 2 has multiple insertion slots 14 vertically opened for inserting multiple insert rods 12.

[0041] When the bottom of the lid 2 is inserted into the slot 5, multiple insert rods 12 will also be inserted into multiple insertion slots 14. Through the cooperation between the insert rods 12 and the insertion slots 14, the lid 2 can be prevented from moving laterally in the slot 5.

[0042] An anti-detachment block 16 is fixedly installed on the surface of the insertion rod 12. A vertical groove 17 is vertically opened in the groove wall of the insertion groove 14. An annular limiting opening 18 connected to the vertical groove 17 is opened in the groove wall of the insertion groove 14. An anti-slip pad 21 is adhered to the lower surface of the mounting block 13. The lower surface of the anti-slip pad 21 is at the same horizontal line as the lower surface of the first mounting frame 3.

[0043] When the lid 2 is placed directly above the body 1, and the multiple insert rods 12 are aligned with the positions of the multiple insertion slots 14, the anti-detachment blocks 16 on the surface of the insert rods 12 will not align with the positions of the vertical slots 17 under the elastic potential energy of the torsion springs 15. Therefore, the insert rods 12 cannot be inserted into the insertion slots 14 at this time. It is necessary to control the rotation of the multiple insert rods 12 so that the multiple anti-detachment blocks 16 align with the positions of the multiple vertical slots 17. Then, the lid 2 is lowered so that its bottom end is inserted into the slot 5. During this process, the multiple insert rods 12 are no longer controlled, and the multiple anti-detachment blocks 16 will be inserted into the multiple vertical slots 17 until the bottom end of the lid 2 is firmly abutted against the second sealing gasket 10 located in the slot 5. At this point, the anti-detachment blocks 16 in the vertical slots 17 will... Corresponding to the position of the limiting port 18, the pressure force exerted by the vertical groove 17 on the anti-detachment block 16 disappears, and the anti-detachment block 16 will quickly rotate and reset under the elastic potential energy of the torsion spring 15 and enter the limiting port 18. The multiple anti-detachment blocks 16 will return to a position that does not correspond to the multiple vertical grooves 17. At this time, the lid 2 can no longer be separated from the body 1. Then, the locking between the body 1 and the lid 2 can be completed by multiple locking screws 7, which can help fix the lid 2 and the body 1. Even if the locking screw 7 is affected by temperature changes, vibration and other factors and rotates, the lock between the lid 2 and the body 1 will not be released under the restriction between the multiple anti-detachment blocks 16 and the multiple limiting ports 18, and will still be in a tightly abutting state, further improving the sealing performance.

[0044] When it is necessary to separate the box body 1 from the box cover 2, simply loosen the locking screws 7 by turning them, and then rotate the mounting blocks 13 to make the rods 12 rotate until the anti-detachment blocks 16 on the surface correspond to the positions of the vertical slots 17. Only then can the box cover 2 be moved up until the rods 12 are removed from the insertion slots 14. The anti-slip pads 21 can increase the friction between the palm and the mounting block 13, preventing slippage, and allowing the rods 12 to rotate smoothly through the friction between the palm and the mounting block 13.

[0045] Meanwhile, the cooperation between the anti-detachment block 16 and the restriction port 18 can prevent unauthorized personnel from arbitrarily opening the box cover 2 and exposing the box body 1 to the outside, thus playing a certain protective and safety role. Only operators familiar with this design can control the separation of the box body 1 from the box cover 2. Furthermore, since the lower surface of the anti-slip pad 21 is at the same level as the lower surface of the first mounting frame 3, the insertion rod 12 is a hidden design, and personnel unfamiliar with this design cannot see how to release the restriction from the outside.

[0046] A rectangular opening 19 is provided on the surface of the housing 1. An encryption component for improving the sealing is provided inside the rectangular opening 19. The encryption component includes a sealing airbag 20 fixedly installed inside the rectangular opening 19. An air storage groove 22 is provided on the lower surface of the housing 1. A piston block 23 is slidably sealed inside the air storage groove 22. The piston block 23 is connected to the groove wall of the air storage groove 22 through multiple sets of telescopic components. The telescopic components include telescopic springs 25. The two ends of the telescopic springs 25 are fixedly connected to the top of the piston block 23 and the top wall of the air storage groove 22, respectively. Multiple vents 24 are vertically provided on the top wall of the air storage groove 22, all of which are connected to the rectangular opening 19. All of the multiple vents 24 are connected to the sealing airbag 20.

[0047] In the initial state, under the elastic potential energy of multiple telescopic springs 25, the bottom of the piston block 23 is exposed to the outside, and the sealing airbag 20 is in a contracted state. When the cover 2 and the body 1 are installed and the body 1 is placed on the ground, the piston block 23 will move into the air storage tank 22 under the pressure. The multiple telescopic springs 25 will contract, the space in the air storage tank 22 will decrease, and the pressure will increase. The gas in the air storage tank 22 will be filled into the sealing airbag 20 through multiple vents 24, causing the sealing airbag 20 to expand and deform. The expanded sealing airbag 20 can seal the space between the cover 2 and the body 1, further increasing the difficulty for water to enter the body 1 and further improving the overall sealing performance of the battery box.

[0048] When the housing 1 is lifted off the ground, the piston block 23 will move and reset quickly under the elastic potential energy of multiple extension springs 25. The space in the air storage tank 22 will increase and the pressure will decrease. The gas in the sealing airbag 20 will flow back into the air storage tank 22 from multiple vents 24, and the sealing airbag 20 will gradually contract and recover.

[0049] In this invention, when the control box cover 2 is installed with the box body 1, the bottom end of the box cover 2 is first aligned with the slot 5 and inserted. At this time, multiple through holes will correspond to the positions of multiple threaded grooves 8 respectively, and the top of the rectangular groove 4 will abut against the upper surface of the box body 1. The first sealing gasket 9 will abut against the upper surface of the first mounting frame 3, and the second sealing gasket 10 will abut against the bottom of the box cover 2. The first sealing gasket 9 can prevent water from entering the slot 5 from the outside, while the second sealing gasket 10 can prevent water from passing through the slot 5, achieving a double sealing effect. At the same time, a U-shaped gap is formed between the bottom of the box cover 2 and the slot 5. Compared with a horizontal gap, the U-shaped gap can increase the difficulty for water to pass through the slot 5. Even if water passes through the slot 5, since the bottom horizontal plane of the box cover 2 is lower than the top horizontal plane of the box body 1, there is a certain height difference between the water passing through the slot 5 and the top of the box body 1, so it cannot enter the box body 1, further improving the sealing performance.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel sealing structure for a battery box, comprising a box body (1) and a box cover (2), characterized in that, The box body (1) is fixedly fitted with a first mounting frame (3), the lower surface of the box cover (2) is provided with a rectangular groove (4), the upper surface of the first mounting frame (3) is provided with a slot (5) for the bottom of the box cover (2) to be inserted, the surface of the box cover (2) is fixedly fitted with a second mounting frame (6), the surface of the second mounting frame (6) is provided with multiple through holes, and a locking screw (7) is inserted into the through holes. The surface of the first mounting frame (3) is provided with multiple threaded grooves (8) for the threaded installation of multiple locking screws (7). The second mounting frame (6) has a first sealing gasket (9) bonded to its lower surface, and the slot (5) has a second sealing gasket (10) bonded to its bottom. The first sealing gasket (9) and the second sealing gasket (10) are both made of rubber. The slot (5) has multiple T-shaped mounting openings (11) vertically opened at the bottom. A rod (12) is rotatably installed in the mounting opening (11). A mounting block (13) is fixedly installed at the bottom of the rod (12). The mounting block (13) is connected to the wall of the mounting opening (11) through an elastic component. The lower surface of the box cover (2) has multiple insertion slots (14) vertically opened for inserting multiple rods (12). The elastic component includes a torsion spring (15) sleeved on the insert rod (12), and the two ends of the torsion spring (15) are fixedly connected to the upper surface of the mounting block (13) and the top wall of the mounting port (11), respectively. The insertion rod (12) is fixedly installed with an anti-detachment block (16), the insertion groove (14) has a vertical groove (17) in the groove wall, and the insertion groove (14) has an annular limiting port (18) that communicates with the vertical groove (17).

2. The novel sealing structure for a battery box according to claim 1, characterized in that, The lower surface of the mounting block (13) is bonded with an anti-slip pad (21), and the lower surface of the anti-slip pad (21) is at the same level as the lower surface of the first mounting frame (3).

3. A novel sealing structure for a battery box according to claim 1, characterized in that, The box (1) has a rectangular opening (19) on its surface, and the rectangular opening (19) contains a security component for improving sealing.

4. A novel sealing structure for a battery box according to claim 3, characterized in that, The encryption component includes a sealed airbag (20) fixedly installed in a rectangular opening (19). A gas storage groove (22) is provided on the lower surface of the box (1). A piston block (23) is slidably sealed in the gas storage groove (22). The piston block (23) is connected to the groove wall of the gas storage groove (22) through multiple sets of telescopic components. A number of vents (24) are vertically provided on the top wall of the gas storage groove (22), all of which are connected to the rectangular opening (19). The multiple vents (24) are all connected to the sealed airbag (20).

5. A novel sealing structure for a battery box according to claim 4, characterized in that, The telescopic component includes a telescopic spring (25), the two ends of which are fixedly connected to the top of the piston block (23) and the top wall of the gas storage tank (22), respectively.

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