A waterproof and explosion-proof box for a battery pack

Abstract

The utility model discloses a waterproof explosion -proof box for battery pack belongs to battery pack technical field. Including control panel, upper cover and top opening four around setting flange's box type bottom shell, wherein, the upper cover is equipped with a plurality of fastening bolt that can correspond with the thread hole on the flange and is screwed the connection, and the flange is equipped with the first sealing washer that is matched with the thread hole, the inboard fixed connection of upper cover has a plurality of the stud that can correspond with the mounting hole on the control panel, and the control panel is with the inboard of upper cover and is equipped with a plurality of respectively the rubber pad that sets up in the outer periphery of stud, the inboard fixed connection of upper cover has the built -in nut, and the outside is equipped with the air hole that corresponds with built -in nut, built -in nut is used to from the upper cover outer sealing connection explosion -proof valve, and explosion -proof valve is communicated in the inner chamber of box type bottom shell. The utility model discloses a waterproof explosion -proof box for battery pack, has solved the problem that the existing box body structure is difficult to give consideration to waterproof, explosion -proof and anti -shock performance.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, specifically relating to a waterproof and explosion-proof box for battery packs. Background Technology

[0002] With increasing environmental awareness and advancements in battery technology, traditional off-highway vehicles and motor vehicles (such as sightseeing vehicles, shuttle buses, sweepers, and lawnmowers) have adopted lithium battery packs to replace the original internal combustion engines for power.

[0003] However, off-highway machinery mostly operates outdoors, and lithium battery packs typically face complex climate and site conditions. On the one hand, lithium battery packs need to have excellent weather resistance to adapt to environments such as high temperature, extreme cold, and humidity, and also need to have high standards of waterproof and dustproof performance to prevent short circuits or performance degradation caused by dust and rainwater, ensuring safe and stable outdoor operation. On the other hand, the control board in the lithium battery pack also needs to be vibration resistant to cope with the impact of rough roads, ensure stable power output, and also need to have explosion-proof functions to improve the safety of lithium battery pack use.

[0004] However, existing enclosure structures for protecting lithium battery packs are insufficient to meet the aforementioned requirements. Therefore, there is an urgent need for a lithium battery pack protective enclosure that combines reliable waterproofing, high-efficiency explosion-proof performance, and vibration resistance to meet the outdoor operation needs of off-highway machinery. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a waterproof and explosion-proof box for battery packs, which solves the problem that the existing box structure is difficult to balance waterproof, explosion-proof and shock-resistant performance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waterproof and explosion-proof box for battery packs, including a control board, a top cover, and a box-shaped bottom shell with flange surfaces around the top opening; The upper cover is provided with a number of fastening bolts that can correspond to and be threadedly connected to the threaded holes on the flange surface, and the flange surface is provided with a first sealing gasket that matches the threaded holes. The inner side of the upper cover is fixedly connected with a number of studs that correspond to the mounting holes on the control board, and a number of rubber pads respectively sleeved on the outer periphery of the studs are provided between the control board and the inner side of the upper cover. The inner side of the top cover is fixedly connected with an internal nut, and the outer side is provided with a vent hole corresponding to the internal nut. The internal nut is used to seal and connect an explosion-proof valve from the outside of the top cover. The explosion-proof valve is connected to the inner cavity of the box-shaped bottom shell.

[0007] Optionally, the flange surface is provided with an annular protrusion of equal height corresponding to the threaded hole.

[0008] Optionally, the flange surface has a first right-angle folded edge folded towards the bottom of the box-shaped bottom shell on its four periphery, and the top cover has a second right-angle folded edge folded around the outer periphery of the first right-angle folded edge.

[0009] Optionally, a thermally conductive silicone pad is provided between the control board and the top cover, and the two sides of the thermally conductive silicone pad can respectively adhere to the inner side of the top cover and the top side of the control board.

[0010] Optionally, the top side of the upper cover is provided with a first through hole for installing a terminal block, and the top side of the upper cover is provided with a plurality of first threaded blind holes arranged in a circumferential array along the first through hole from the outside to the inside. The bottom end of the terminal block is provided with a flange structure corresponding to the first threaded blind hole, and a second sealing gasket is provided between the flange structure at the bottom end of the terminal block and the upper cover.

[0011] Optionally, the top side of the upper cover is provided with a second through hole for installing an aviation flange seat, and the top side of the upper cover is provided with a plurality of second threaded blind holes arranged in a circumferential array along the second through hole from the outside to the inside. The flange structure on the aviation flange seat matches the plurality of second threaded blind holes, and a third sealing gasket is provided between the flange structure on the aviation flange seat and the upper cover.

[0012] Optionally, a switch button is provided on the top side of the upper cover.

[0013] Optionally, two handles are symmetrically arranged along the middle of the top side of the cover.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: (1) By adding a first sealing gasket on the flange face at the top opening of the box-type bottom shell, when the fastening bolts are screwed into the threaded holes on the flange face, the first sealing gasket can fully fill the gap between the top cover and the box-type bottom shell, ensuring that the top cover and the box-type bottom shell can form a sealed cavity structure to prevent lithium battery packs, thereby ensuring the waterproof and dustproof performance of the waterproof and explosion-proof box. (2) By fixing the control board to the inside of the top cover, a rubber pad is added between the control board and the top cover, so that the rubber pad can effectively absorb the vibration transmitted from the top cover and the box-shaped bottom shell to the control board, thereby improving the shock resistance of the control board. (3) By adding an explosion-proof valve that can communicate with the cavity structure on the top cover, the pressure inside the box can be released in time when the lithium battery pack inside the cavity structure overheats, short circuits or leaks, which may cause a sharp increase in pressure, thus preventing the box from exploding and causing adverse effects. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural schematic diagram of the waterproof and explosion-proof box for the battery pack in a preferred embodiment of this utility model; Figure 2 This is an exploded structural diagram of the waterproof and explosion-proof box for the battery pack in a preferred embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the upper cover in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the box-shaped bottom shell in a preferred embodiment of the present invention; The components are as follows: 1. Control panel; 2. Top cover; 201. Stud; 202. Vent hole; 203. Second right-angle folded edge; 204. First through hole; 205. First threaded blind hole; 206. Second through hole; 207. Second threaded blind hole; 3. Box-type bottom shell; 301. Flange face; 302. Threaded hole; 303. Annular equal-height protrusion; 304. First right-angle folded edge; 4. Fastening bolt; 5. First sealing gasket; 6. Rubber gasket; 7. Built-in nut; 8. Explosion-proof valve; 10. Thermally conductive silicone gasket; 11. Terminal block; 12. Second sealing gasket; 13. Aviation plug flange seat; 14. Third sealing gasket; 15. Switch button; 16. Handle. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0019] like Figures 1-4As shown, a waterproof and explosion-proof box for a battery pack includes a control panel 1, a top cover 2, and a box-shaped bottom shell 3 with flange faces 301 around the top opening. The top cover 2 has several fastening bolts 4 that correspond to and are threadedly connected to threaded holes 302 on the flange faces 301. A first sealing gasket 5 matching the threaded holes 302 is provided on the flange faces 301. When the fastening bolts 4 are threadedly tightened to the threaded holes 302 on the box-shaped bottom shell 3, the first sealing gasket 5 between the top cover 2 and the flange faces 301 is compressed. The first sealing gasket 5 deforms under pressure, fully filling the gap between the top cover 2 and the box-shaped bottom shell 3. This creates a sealed cavity structure between the top cover 2 and the box-shaped bottom shell 3 to prevent short circuits caused by dust, rainwater, etc. Meanwhile, the control board 1 can also be installed within this cavity structure. Specifically, several studs 201 corresponding to the mounting holes on the control board 1 are fixedly connected to the inner side of the upper cover 2, and several rubber pads 6 are respectively fitted around the outer periphery of the studs 201 between the control board 1 and the inner side of the upper cover 2. That is, the studs 201 located on the inner side of the upper cover 2 can be inserted into the pre-drilled mounting holes on the control board 1 after the rubber pads 6 are inserted. At the same time, corresponding nuts can be threaded onto the studs 201. After tightening the nuts, the control board 1 can be fixed inside the upper cover 2. At this time, the rubber pads 6 elastically supported between the control board 1 and the inner side of the upper cover 2 can effectively absorb the vibration transmitted from the upper cover 2 and the box-shaped bottom shell 3 to the control board 1, thereby ensuring stable power transmission when dealing with the impact of rough roads. Meanwhile, in this technical solution, an internal nut 7 is fixedly connected to the inner side of the upper cover 2, and a vent hole 202 corresponding to the internal nut 7 is opened on the outer side. The internal nut 7 is used to seal the explosion-proof valve 8 from the outside of the upper cover 2. The end of the internal nut 7 can be seamlessly welded to the inner side of the upper cover 2. The explosion-proof valve 8 and the internal nut 7 can be sealed together using various sealing structures such as thread sealant, O-rings, and flat washers, so that the explosion-proof valve 8 is connected to the cavity structure and can ensure the sealing of the cavity structure. At the same time, by setting the explosion-proof valve 8, pressure can be released in time when the lithium battery pack in the cavity structure overheats, short-circuits, or leaks, which may cause a sharp increase in pressure inside the box, preventing the box from exploding and causing adverse effects.

[0020] It should be noted that when the waterproof and explosion-proof box in this technical solution enters the testing phase, the vent 202 can be used as an air inlet connector for air tightness testing.

[0021] Furthermore, such as Figure 1 , Figure 2 , Figure 4As shown, annular protrusions 303 of equal height corresponding to threaded holes 302 are provided on the flange face 301 around the top opening of the box-shaped bottom shell 3. This ensures that when the fastening bolt 4 is screwed into the threaded hole 302 on the flange face 301, the compression of the first sealing gasket 5 is consistent at all points, thereby improving the waterproof rating of the waterproof and explosion-proof box in this technical solution and ensuring that the threaded hole 302 has sufficient strength when threadedly connected to the fastening bolt 4.

[0022] The above, such as Figure 1 , Figure 2 As shown, the flange face 301 has a first right-angled flange 304 folded towards the bottom of the box-shaped bottom shell 3 on its four periphery to increase the strength of the top opening of the box-shaped bottom shell 3. The top cover 2 has a second right-angled flange 203 that can cover the outer periphery of the first right-angled flange 304 on its four periphery. The second right-angled flange 203 can increase the strength of the top cover 2 and can also cooperate with the first right-angled flange 304 to increase the deformation resistance of the waterproof and explosion-proof box.

[0023] In this embodiment, as Figure 3 As shown, a thermally conductive silicone pad 10 is provided between the control board 1 and the upper cover 2, and the two sides of the thermally conductive silicone pad 10 can be attached to the inner side of the upper cover 2 and the top side of the control board 1 respectively, so that the heat accumulated on the control board 1 can be discharged through the upper cover 2. Example 2

[0024] like Figures 1-4 As shown, based on Embodiment 1, the top side of the upper cover 2 is provided with a first through hole 204 for installing the wiring terminal 11, so as to facilitate the connection of the lithium battery pack placed in the cavity structure to external devices through the wiring terminal 11. It should be noted that the top side of the upper cover 2 is provided with a plurality of first threaded blind holes 205 arranged in a circumferential array along the first through hole 204 from the outside to the inside. The bottom end of the wiring terminal 11 is provided with a flange structure corresponding to the first threaded blind hole 205, and a second sealing gasket 12 is provided between the flange structure at the bottom end of the wiring terminal 11 and the upper cover 2. That is, when the flange structure on the wiring terminal 11 is fastened to the first threaded blind hole 205 on the upper cover 2 by bolts, the second sealing gasket 12 will be deformed under pressure, thereby filling the gap between the wiring terminal 11 and the first through hole 204, ensuring the sealing and waterproof performance of the cavity structure between the upper cover 2 and the box-shaped bottom shell 3.

[0025] Similarly, such as Figure 2 , Figure 3As shown, the top side of the upper cover 2 is provided with a second through hole 206 for installing the aviation plug flange seat 13 to meet the requirements of the waterproof and explosion-proof box for the use of aviation plugs. It should be noted that the top side of the upper cover 2 is provided with a number of second threaded blind holes 207 arranged in a circumferential array along the second through hole 206 from the outside to the inside. The flange structure on the aviation plug flange seat 13 matches the number of second threaded blind holes 207, and a third sealing gasket 14 is provided between the flange structure on the aviation plug flange seat 13 and the upper cover 2. That is, when the flange structure on the aviation plug flange seat 13 is fastened to the second threaded blind holes 207 on the upper cover 2 by bolts, the sealing and waterproof performance of the cavity structure can also be ensured by the third sealing gasket 14.

[0026] As mentioned above, a switch button 15 is also provided on the top side of the top cover 2. The switch button 15 and the top cover 2 can be sealed together by existing sealing structures such as O-rings, sealing sleeves, waterproof glue, and potting glue. This ensures the sealing and waterproof performance of the cavity structure, while also allowing operators to easily control the discharge of the lithium battery pack through the external switch button 15.

[0027] Furthermore, in this technical solution, two handles 16 are symmetrically arranged along the middle of the top side of the upper cover 2 to facilitate handling by operators.

[0028] Working principle: By adding a first sealing gasket 5 and an annular protrusion 303 of equal height corresponding to the threaded hole 302 on the flange face 301 at the top opening of the box-shaped bottom shell 3, the compression of the first sealing gasket 5 can be kept consistent when the fastening bolt 4 is screwed into the threaded hole 302 on the flange face 301. This fully fills the gap between the top cover 2 and the box-shaped bottom shell 3, ensuring that a sealed cavity structure for the lithium battery pack can be formed between the top cover 2 and the box-shaped bottom shell 3. At the same time, by adding a rubber gasket 6 between the control plate 1 and the top cover 2 when fixing the control plate 1 inside the top cover 2, the rubber gasket 6 can effectively absorb the vibration transmitted from the top cover 2 and the box-shaped bottom shell 3 to the control plate 1, thereby improving the shock resistance of the control plate 1. Furthermore, by adding an explosion-proof valve 8 on the top cover 2 that can communicate with the cavity structure, the pressure inside the box can be released in time in case of overheating, short circuit, or leakage of the lithium battery pack in the cavity structure, which may cause a sharp increase in pressure, preventing the box from exploding and causing adverse effects.

[0029] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A waterproof and explosion-proof box for a battery pack, characterized in that: Includes a control panel (1), a top cover (2), and a box-shaped bottom shell (3) with flange faces (301) around the top opening; The upper cover (2) is provided with a number of fastening bolts (4) that correspond to and are threaded to the threaded holes (302) on the flange face (301), and the flange face (301) is provided with a first sealing gasket (5) that matches the threaded holes (302). The inner side of the upper cover (2) is fixedly connected with a number of studs (201) that correspond to the mounting holes on the control plate (1), and a number of rubber pads (6) respectively sleeved on the outer periphery of the studs (201) are provided between the control plate (1) and the inner side of the upper cover (2). The inner side of the upper cover (2) is fixedly connected with a built-in nut (7), and the outer side is provided with a vent hole (202) corresponding to the built-in nut (7). The built-in nut (7) is used to seal the connection of the explosion-proof valve (8) from the outside of the upper cover (2). The explosion-proof valve (8) is connected to the inner cavity of the box-shaped bottom shell (3).

2. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: The flange face (301) is provided with an annular, equal-height protrusion (303) corresponding to the threaded hole (302).

3. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: The flange face (301) has a first right-angle fold (304) folded towards the bottom of the box-shaped bottom shell (3) on its four periphery, and the top cover (2) has a second right-angle fold (203) that can cover the outer periphery of the first right-angle fold (304) on its four periphery.

4. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: A thermally conductive silicone pad (10) is provided between the control board (1) and the upper cover (2), and the two sides of the thermally conductive silicone pad (10) can respectively adhere to the inner side of the upper cover (2) and the top side of the control board (1).

5. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: The top side of the upper cover (2) is provided with a first through hole (204) for installing the terminal block (11). The top side of the upper cover (2) is provided with a plurality of first threaded blind holes (205) arranged in a circumferential array along the first through hole (204) from the outside to the inside. The bottom end of the terminal block (11) is provided with a flange structure corresponding to the first threaded blind hole (205), and a second sealing gasket (12) is provided between the flange structure at the bottom end of the terminal block (11) and the upper cover (2).

6. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: The top side of the upper cover (2) is provided with a second through hole (206) for installing the aviation flange seat (13). The top side of the upper cover (2) is provided with a plurality of second threaded blind holes (207) arranged in a circumferential array along the second through hole (206) from the outside to the inside. The flange structure on the aviation flange seat (13) matches the plurality of second threaded blind holes (207), and a third sealing gasket (14) is provided between the flange structure on the aviation flange seat (13) and the upper cover (2).

7. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: A switch button (15) is provided on the top side of the upper cover (2).

8. The waterproof and explosion-proof box for battery packs according to claim 1, characterized in that: The top side of the cover (2) has two handles (16) symmetrically arranged along the middle part.

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