Lithium battery shell with waterproof structure

Abstract

The utility model relates to a lithium battery shell with waterproof structure relates to lithium battery waterproof technical field, solved the technical problem that port sealing effect is poor and difficult to dismantle the circuit board in small space and replace, the protective cover and the wiring hole on the bottom shell, be equipped with lithium battery main part in the bottom shell, be equipped with circuit installation board in the bottom shell, one side of circuit installation board is equipped with circuit board, all be equipped with same upper seal frame in the bottom shell upper side, the upper seal groove is set up on the upper seal frame surface, the upper seal groove is filled with sealed foaming glue, the upper protective cover bottom lap -joint in the upper seal groove, there is fixed screw hole under the upper protective cover, be provided with sealing ring in fixed screw hole, the utility model discloses the sealing system that the upper seal groove on the upper seal frame surface, the fixed screw hole and the sealing ring in fixed screw hole under the upper protective cover of upper seal frame on the bottom shell upper side form, can effectively block the external moisture and enter the shell, avoid the lithium battery main part to damage because of water, ensure its long -term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery waterproofing technology, specifically a lithium battery casing with a waterproof structure. Background Technology

[0002] Lithium batteries are a type of chemical power source that uses lithium metal or lithium ions as the core energy storage carrier. They rely on the insertion and extraction of lithium ions between the positive and negative electrodes to achieve charge and discharge cycles. Compared with traditional batteries, they have advantages such as high energy density, low self-discharge rate, long cycle life, and no memory effect. They are widely used in consumer electronics (mobile phones, laptops), new energy vehicles, energy storage systems and other fields. Depending on whether they contain lithium metal, they can be divided into lithium metal batteries (high activity, requiring special protection) and lithium ion batteries (higher safety, the mainstream application type).

[0003] Ensuring safety is a core requirement during the installation and use of lithium batteries. Lithium batteries can pose safety risks under improper stress, sudden temperature changes, or accidental collisions. Therefore, they are typically housed in dedicated mounting cases to effectively improve their stability and safety during use, ensuring reliable operation in various application scenarios. Currently, when using lithium battery casings, we have found that existing casings rely solely on sealing rings for connection at the ports. This connection method still results in water leakage at the ports, indicating that the port sealing performance remains inadequate.

[0004] In practical applications, lithium batteries need to work in conjunction with circuit boards to achieve stable and safe power supply and functional control. Circuit boards can precisely manage the charging and discharging process of lithium batteries, such as preventing overcharging, over-discharging, and overcurrent, to avoid battery damage or safety risks. At the same time, circuit boards can also integrate voltage conversion, signal transmission and other functions, so that the power output of lithium batteries can be adapted to the needs of different devices. However, most circuit boards are currently fixedly installed in the casing. When the circuit board fails, due to the small space inside the casing, it is often very difficult to disassemble, repair and replace the circuit board.

[0005] Based on this, the present invention provides a lithium battery casing with a waterproof structure to solve the above problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a lithium battery casing with a waterproof structure. This utility model has an ingenious structure and focuses on practicality, effectively solving the technical problems of poor port sealing effect and difficulty in disassembling and replacing circuit boards in small spaces.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A waterproof lithium battery casing includes a bottom casing, an upper protective cover snapped onto the bottom casing, and wiring holes communicating with the bottom casing and formed on the upper protective cover. The bottom casing contains a lithium battery body and a circuit mounting plate. A circuit board is mounted on one side of the circuit mounting plate. The bottom casing has a single upper sealing frame on all four sides. An upper sealing groove is formed on the surface of the upper sealing frame and filled with sealing foam. The bottom of the upper protective cover overlaps within the upper sealing groove. Multiple fixing screw holes communicating with the upper sealing groove are formed below the upper protective cover, and sealing rings are disposed within the fixing screw holes.

[0009] Preferably, a side mounting plate is fixedly installed inside the bottom shell, and two symmetrically distributed downward compression springs are fixedly installed on the side mounting plate. A sleeve is fixedly installed on the top of each of the two downward compression springs. Two symmetrically distributed support rods are fixedly installed inside the side mounting plate. The two sleeves are slidably connected to the surfaces of different support rods. A lifting plate is fixedly installed on one side of each of the two sleeves. The same lifting rod is fixedly installed between the two lifting plates. Multiple evenly distributed positioning holes are opened on the top of both the side mounting plate and the wiring mounting plate. A connecting block that can overlap the lifting rod is fixedly installed on one side of the wiring mounting plate.

[0010] Preferably, the side mounting plate has two symmetrically distributed support shafts rotatably connected to the inner side above it. Each of the two support shafts has an upper sliding plate fixedly mounted on its surface. Each of the two upper sliding plates has a lower sliding plate slidably connected to its bottom. Each of the two lower sliding plates has a slot at its bottom. Each of the two sleeves has a locking block fixedly mounted on one side that can be engaged in the slot.

[0011] Preferably, the bottom of the upper sliding plate is provided with a sliding groove, an upper compression spring is provided in the sliding groove, and a sliding block is fixedly installed at the bottom end of the upper compression spring, which is slidably connected in the sliding groove and fixedly installed above the lower sliding plate.

[0012] Preferably, the side mounting plate is provided with two symmetrically distributed limiting rods, and the surfaces of the two limiting rods are slidably connected to the limiting frame on one side of the same line mounting plate.

[0013] Preferably, two symmetrically distributed upper mounting plates are fixedly installed on the upper protective cover. Each upper mounting plate and the upper protective cover are provided with multiple symmetrically distributed fixing bolts. Each upper mounting plate is rotatably connected to a handle on its top.

[0014] This utility model has the following beneficial technical effects.

[0015] 1. This utility model utilizes a sealing system formed by the upper sealing frame above the bottom outer shell, the upper sealing groove on the surface of the upper sealing frame, the fixing screw hole below the upper protective cover, and the sealing ring inside the fixing screw hole. After filling the sealing groove with sealing foam, it can tightly seal the connection gap between the bottom outer shell and the upper protective cover. With the addition of external bolts for fastening, it can effectively prevent external moisture from entering the shell, avoid damage to the lithium battery body due to water ingress, and ensure its long-term stable operation.

[0016] 2. This utility model involves pushing the upper end of the upper sliding plate inward, causing it and the lower sliding plate to rotate outward around the support shaft. With the help of the slot and the arc-shaped surface of the spherical locking block, the lower sliding plate disengages from the locking block under the buffering action of the sliding groove, the sliding block, and the upper pressure spring. The compressed lower pressure spring then releases its elastic force, pushing the sleeve, the lifting plate, and the lifting rod upward, thereby causing the connecting locking block, the circuit mounting plate, and the circuit board to detach from the bottom shell. This facilitates quick removal for repair or replacement, significantly shortening maintenance time and reducing costs. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the assembly structure of the side mounting plate, circuit board, and circuit mounting plate in this utility model.

[0020] Figure 3 This is a schematic diagram of the assembly structure of the card block, card slot and lower sliding plate in this utility model.

[0021] Figure 4 This is a schematic diagram of the assembly structure of the upper sealing frame, upper sealing groove and fixing screw hole in this utility model.

[0022] Figure 5 This is a schematic diagram of the assembly structure of the handle, lithium battery body and side mounting plate in this utility model.

[0023] Figure 6 This is a schematic diagram of the assembly structure of the connecting block, lifting rod and limiting frame in this utility model.

[0024] Figure label:

[0025] 1. Bottom outer shell; 2. Upper protective cover; 3. Wiring hole; 4. Upper mounting plate; 5. Fixing bolt; 6. Handle; 7. Lithium battery body; 8. Side mounting plate; 9. Circuit board; 10. Circuit mounting plate; 11. Positioning hole; 12. Lower compression spring; 13. Sleeve; 14. Locking block; 15. Locking groove; 16. Lower sliding plate; 17. Support rod; 18. Lifting plate; 19. Sliding block; 20. Upper compression spring; 21. Sliding groove; 22. Upper sliding plate; 23. Support shaft; 24. Upper sealing frame; 25. Upper sealing groove; 26. Fixing screw hole; 27. Connecting locking block; 28. Lifting rod; 29. ​​Limiting frame; 30. Limiting rod. Detailed Implementation

[0026] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The detailed description of the embodiments will make this clear. All references to the following embodiments are made with reference to the accompanying drawings.

[0027] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0028] This utility model relates to a waterproof lithium battery casing, comprising a bottom casing 1, an upper protective cover 2 snapped onto the bottom casing 1, and a wiring hole 3 communicating with the bottom casing 1 and formed on the upper protective cover 2. A lithium battery body 7 is housed inside the bottom casing 1, and a circuit mounting plate 10 is also housed inside the bottom casing 1. A circuit board 9 is mounted on one side of the circuit mounting plate 10. The bottom casing 1 has a single upper sealing frame 24 on all four sides of its upper surface. The upper sealing frame 24 has an L-shaped cross-section. The bottom casing 1 is a rectangular metal box, and the upper sealing frame 24 has the same shape as the upper port of the bottom casing 1. The upper protective cover 24 has an upper sealing groove 25 on its surface. The lower end of the upper protective cover 2 is L-shaped and extends into the upper sealing groove 25, so that the upper protective cover 2 and the upper sealing groove 25 are connected. The shape of the upper sealing groove 25 is the same as that of the upper sealing frame 24. The upper sealing groove 25 is filled with sealing foam. The bottom of the upper protective cover 2 overlaps in the upper sealing groove 25. Multiple fixing screw holes 26 communicating with the upper sealing groove 25 are opened below the upper protective cover 2. A sealing ring is provided in the fixing screw hole 26. The sealing foam is added into the upper sealing groove 25 through the fixing screw hole 26.

[0029] In this embodiment, when it is necessary to waterproof and seal the lithium battery body 7, the lithium battery body 7 can be placed inside the bottom outer shell 1 first, and then the upper protective cover 2 can be inserted into the upper sealing groove 25 opened on the surface of the upper sealing frame 24. Then, sealing foam is injected into the upper sealing groove 25 through the fixing screw hole 26, and after injection, the sealing ring is inserted into the fixing screw hole 26 to waterproof and seal the connection between the bottom outer shell 1 and the upper protective cover 2. Finally, the bottom outer shell 1 and the upper protective cover 2 can be finally fastened together with the external bolts.

[0030] As one embodiment, a side mounting plate 8 is fixedly installed inside the bottom outer shell 1. Two symmetrically distributed downward compression springs 12 are fixedly installed on the side mounting plate 8. A sleeve 13 is fixedly installed on the top of each of the two downward compression springs 12. The downward compression springs 12 are in a compressed state and can provide an upward elastic force to the sleeves 13. Two symmetrically distributed support rods 17 are fixedly installed inside the side mounting plate 8. The two sleeves 13 are slidably connected to the surfaces of different support rods 17. The support rods 17 can limit and support the sleeves 13. A lifting plate 18 is fixedly installed on one side of each of the two sleeves 13, and a [missing information - likely a device or mechanism] is fixedly installed between the two lifting plates 18. The same lifting rod 28 is a curved metal rod. Multiple evenly distributed positioning holes 11 are provided on the top of both the side mounting plate 8 and the wiring mounting plate 10. The side mounting plate 8 and the wiring mounting plate 10 are positioned and secured by the positioning holes 11 and positioning bolts. A connecting block 27, which can overlap the lifting rod 28, is fixedly installed on one side of the wiring mounting plate 10. The connecting block 27 is a metal block with a rounded bottom. Two symmetrically distributed support shafts 23 are rotatably connected to the inner side of the top of the side mounting plate 8. An upper sliding plate 22 is fixedly installed on the surface of each support shaft 23. The upper sliding plate 22 has upper and lower parts. The upper sliding plate 22 has a driving end at its upper end and a driven end at its lower end. A return spring (not shown in the figure) is provided between the upper sliding plate 22 and the side mounting plate 8. Lower sliding plates 16 are slidably connected to the bottom of both upper sliding plates 22. Each of the two lower sliding plates 16 has a slot 15 at its bottom. Each of the two sleeves 13 has a locking block 14 fixedly installed on one side, capable of locking into the slot 15. The locking block 14 is a spherical metal block. The slot 15 is a circular groove matching the size of the locking block 14. A sliding groove 21 is provided at the bottom of the upper sliding plate 22, and an upper pressure spring 20 is provided within the sliding groove 21. Spring 20 is in a compressed state, which can provide downward elastic force to the lower sliding plate 16. The bottom end of the upper compression spring 20 is fixedly installed with a sliding block 19 that is slidably connected in the sliding groove 21 and fixedly installed above the lower sliding plate 16. By setting the sliding groove 21 and the sliding block 19, the disassembly and unloading can be buffered, and sufficient space can be provided for disassembly and installation. The side mounting plate 8 is provided with two symmetrically distributed limit rods 30. The surfaces of the two limit rods 30 are slidably connected to the limit frame 29 on one side of the same line mounting plate 10. The limit rods 30 are used to position, support and protect the limit frame 29 and the line mounting plate 10.

[0031] In this embodiment, when the circuit mounting plate 10 and circuit board 9 need to be installed before sealing the bottom outer shell 1 and the upper protective cover 2, the circuit board 9 is first connected to the circuit mounting plate 10. Then, the connecting clip 27 and the limiting bracket 29 are installed on one side of the circuit mounting plate 10, and the circuit mounting plate 10 is placed into the side mounting plate 8 inside the bottom outer shell 1. During the placement process, it is important to first insert the limiting bracket 29 into the limiting rod 30, and then continue to press down on the circuit mounting plate 10 and circuit board 9. At this time, the connecting clip 27 on one side of the circuit mounting plate 10... 7. Press down the lifting rod 28, and drive the lifting plate 18, sleeve 13 and locking block 14 to descend. Initially, the locking block 14 abuts against one side of the lower sliding plate 16, so that the lower sliding plate 16 is in an inclined state. When the locking block 14 descends to below the lower sliding plate 16, the upper sliding plate 22 and the lower sliding plate 16 are rotated in the vertical direction by the reset spring, and the locking block 14 is locked and limited. At this time, the upper part of the wiring mounting plate 10 overlaps the upper part of the side mounting plate 8. After the position is limited, the wiring mounting plate 10 and the side mounting plate 8 are connected and fixed by means of the positioning hole 11.

[0032] If circuit board 9 malfunctions, the upper protective cover 2 can be opened, the positioning bolts on the positioning hole 11 can be removed, and the upper end of the upper sliding plate 22 can be pushed inward, so that the upper sliding plate 22 and the lower sliding plate 16 rotate outward around the support shaft 23. At this time, with the help of the arc surface of the slot 15 and the block 14, the lower sliding plate 16 is driven to disengage from the block 14. When the block 14 disengages from the sleeve 13, the sleeve 13, the lifting plate 18 and the lifting rod 28 are released and pushed upward by the lower compression spring 12, thereby driving the connecting block 27, the circuit mounting plate 10 and the circuit board 9 to be pushed upward, and driving the circuit mounting plate 10 and the circuit board 9 to disengage from the bottom outer shell 1. Finally, the circuit mounting plate 10 and the circuit board 9 can be removed for repair and replacement.

[0033] As an example, two symmetrically distributed upper mounting plates 4 are fixedly installed on the upper protective cover 2. Multiple symmetrically distributed fixing bolts 5 are provided between each upper mounting plate 4 and the upper protective cover 2. Each upper mounting plate 4 is rotatably connected to a handle 6 on its top.

[0034] Working principle:

[0035] First, place the lithium battery body 7 inside the rectangular metal box-shaped bottom shell 1, then connect the circuit board 9 to the circuit mounting plate 10. Next, place the circuit mounting plate 10, which is equipped with a connecting block 27 and a limiting bracket 29, into the bottom shell 1, so that the limiting bracket 29 is engaged in the limiting rod 30 on the side mounting plate 8. Continue to press down the circuit mounting plate 10, and the connecting block 27 on one side will press down the lifting rod 28 of the curved metal rod, causing the lifting plate 18, sleeve 13 and the spherical metal block blocking block 14 to descend along the support rod 17. When the blocking block 14 descends below the lower sliding plate 16, the upper sliding plate 22 and the lower sliding plate 16 rotate in the vertical direction under the action of the return spring. The circular slot 15 is used to engage and limit the blocking block 14. At this time, the circuit mounting plate 10 overlaps the side mounting plate 8, and the two are fixed by the positioning hole 11 and the positioning bolt.

[0036] Next, insert the upper protective cover 2 into the upper sealing groove 25 on the same upper sealing frame 24 surface around the top of the bottom outer shell 1. Then, inject sealing foam into the upper sealing groove 25 through the fixing screw hole 26 below the upper protective cover 2. Then, insert the sealing ring into the fixing screw hole 26. Finally, use external bolts to fasten the bottom outer shell 1 and the upper protective cover 2 to achieve waterproof sealing. The structure can be moved through the handle 6 rotatably connected to the upper mounting plate 4 installed by the fixing bolt 5 above the upper protective cover 2.

[0037] If circuit board 9 malfunctions, the upper protective cover 2 can be opened, the positioning bolts removed, and the upper end of the upper sliding plate 22 can be moved inward so that it and the lower sliding plate 16 rotate outward around the support shaft 23. The lower sliding plate 16 disengages from the locking block 14 under the action of the sliding block 19 and the upper pressure spring 20 in the sliding groove 21. The compressed lower pressure spring 12 releases its elasticity, pushing the sleeve 13, the lifting plate 18 and the lifting rod 28 upward, thereby causing the connecting locking block 27, the circuit mounting plate 10 and the circuit board 9 to detach from the bottom outer shell 1 for removal, repair and replacement. At the same time, the circuit can be led out through the wiring hole 3.

[0038] This utility model has the following beneficial technical effects.

[0039] 1. This utility model utilizes a sealing system formed by the upper sealing frame 24 above the bottom outer shell 1, the upper sealing groove 25 on the surface of the upper sealing frame 24, the fixing screw hole 26 below the upper protective cover 2, and the sealing ring inside the fixing screw hole 26. After filling the sealing groove 25 with sealing foam, it can tightly seal the connection gap between the bottom outer shell 1 and the upper protective cover 2. With the addition of external bolts for fastening, it can effectively prevent external moisture from entering the shell, avoid damage to the lithium battery body 7 due to water ingress, and ensure its long-term stable operation.

[0040] 2. This utility model, by pushing the upper end of the upper sliding plate 22 inward, causes it and the lower sliding plate 16 to rotate outward around the support shaft 23. With the help of the arc-shaped surface of the slot 15 and the spherical locking block 14, the lower sliding plate 16 disengages from the locking block 14 under the buffering cooperation of the sliding groove 21, the sliding block 19 and the upper pressure spring 20. The compressed lower pressure spring 12 then releases its elastic force, pushing the sleeve 13, the lifting plate 18 and the lifting rod 28 upward, thereby causing the connecting locking block 27, the circuit mounting plate 10 and the circuit board 9 to disengage from the bottom outer shell 1, which facilitates quick removal for maintenance or replacement, greatly shortens maintenance time and reduces costs.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery casing with a waterproof structure, comprising a bottom casing (1) and an upper protective cover (2) snapped onto the bottom casing (1), and a wiring hole (3) communicating with the bottom casing (1) and formed on the upper protective cover (2), wherein a lithium battery body (7) is disposed inside the bottom casing (1), and a circuit mounting plate (10) is disposed inside the bottom casing (1), and a circuit board (9) is mounted on one side of the circuit mounting plate (10), characterized in that, The bottom outer shell (1) is provided with the same upper sealing frame (24) on all four sides. The upper sealing frame (24) has an upper sealing groove (25) on its surface. The upper sealing groove (25) is filled with sealing foam. The bottom of the upper protective cover (2) overlaps in the upper sealing groove (25). The upper protective cover (2) has multiple fixing screw holes (26) communicating with the upper sealing groove (25) below it. A sealing ring is provided in the fixing screw hole (26).

2. A lithium battery casing with a waterproof structure according to claim 1, characterized in that, A side mounting plate (8) is fixedly installed inside the bottom shell (1). Two symmetrically distributed downward compression springs (12) are fixedly installed on the side mounting plate (8). A sleeve (13) is fixedly installed on the top of each of the two downward compression springs (12). Two symmetrically distributed support rods (17) are fixedly installed inside the side mounting plate (8). The two sleeves (13) are slidably connected to the surfaces of different support rods (17). A lifting plate (18) is fixedly installed on one side of each of the two sleeves (13). The same lifting rod (28) is fixedly installed between the two lifting plates (18). Multiple evenly distributed positioning holes (11) are opened above the side mounting plate (8) and the line mounting plate (10). A connecting block (27) that can overlap the lifting rod (28) is fixedly installed on one side of the line mounting plate (10).

3. A lithium battery casing with a waterproof structure according to claim 2, characterized in that, The side mounting plate (8) has two symmetrically distributed support shafts (23) rotatably connected to the inner side above. The surfaces of the two support shafts (23) are fixedly mounted with upper sliding plates (22). The bottoms of the two upper sliding plates (22) are slidably connected with lower sliding plates (16). The bottoms of the two lower sliding plates (16) are provided with slots (15). The sides of the two sleeves (13) are fixedly mounted with blocks (14) that can be engaged in the slots (15).

4. A lithium battery casing with a waterproof structure according to claim 3, characterized in that, The upper sliding plate (22) has a sliding groove (21) at the bottom. An upper compression spring (20) is provided in the sliding groove (21). A sliding block (19) is fixedly installed at the bottom of the upper compression spring (20), which is slidably connected in the sliding groove (21) and fixedly installed above the lower sliding plate (16).

5. A lithium battery casing with a waterproof structure according to claim 2, characterized in that, The side mounting plate (8) is provided with two symmetrically distributed limiting rods (30), and the surfaces of the two limiting rods (30) are slidably connected to the limiting frame (29) on one side of the same line mounting plate (10).

6. A lithium battery casing with a waterproof structure according to claim 1, characterized in that, Two symmetrically distributed upper mounting plates (4) are fixedly installed on the upper protective cover (2). Multiple symmetrically distributed fixing bolts (5) are provided between each upper mounting plate (4) and the upper protective cover (2). Each upper mounting plate (4) is rotatably connected to a handle (6) on its top.

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