Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack, and the battery box comprises a box body which is provided with an opening; at least one part of the box cover is inserted into the cavity of the box body from the opening of the box body; at least one part of the sealing structure is clamped between the inner wall of the box body and the outer wall of the box cover, the sealing structure is arranged around the box body, an annular glue injection cavity is formed among the side, facing the opening of the box body, of the sealing structure, the inner wall of the box body and the outer wall of the box cover, and the glue injection cavity is filled with sealant. By filling the sealant into the sealant injection cavity, a lasting sealing effect can be provided, so that the battery box can keep a relatively high protection grade under various environmental conditions, and the sealing structure can also prevent the sealant from leaking into the box body. And in addition, structures such as baffles do not need to be arranged, so that the manufacturing cost and the assembly difficulty are reduced.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more specifically, to a battery box and battery pack. Background Technology

[0002] Currently, the sealing design for small battery packs in two-wheeled and three-wheeled vehicles mainly adopts the following methods: directly attaching adhesive-backed sealing foam to the side wall of the cover and tightening it with screws to achieve a seal; adding a baffle with adhesive-backed sealing components to the cell bracket, and relying on the pressing of the cover and the box body and the fixing with screws to achieve a sealing effect.

[0003] However, these sealing methods have significant drawbacks and shortcomings. Solutions that directly adhere the adhesive-backed sealing foam or use baffle brackets are prone to sealing gaps, making them susceptible to compression failure under long-term thermal expansion and contraction, thus failing to guarantee waterproofing performance. The baffle-based solution also requires additional components to provide sealing support for the lid, increasing manufacturing costs and assembly complexity. Utility Model Content

[0004] The main objective of this application is to provide a battery box and battery pack to solve the problems of battery pack sealing methods in related technologies failing to meet long-term waterproof sealing requirements and high manufacturing costs.

[0005] To achieve the above objectives, according to one aspect of this application, a battery box is provided, comprising: a box body having an opening; a box cover having at least a portion thereof inserted into a cavity of the box body through the opening; and a sealing structure having at least a portion thereof sandwiched between an inner wall of the box body and an outer wall of the box cover, and the sealing structure being disposed around the box body, wherein an annular injection cavity is formed between the side of the sealing structure facing the opening of the box body and the inner wall of the box body and the outer wall of the box cover, and the injection cavity is filled with sealant.

[0006] Furthermore, the sealing structure includes a first sealing strip, a connecting strip, and a second sealing strip connected in sequence, with a groove formed between the first sealing strip, the connecting strip, and the second sealing strip, and the end of the box cover inserted into the groove; wherein, the first sealing strip is sandwiched between the inner wall of the box body and the outer wall of the box cover.

[0007] Furthermore, the sealing structure is inserted into the cavity of the box along with the box cover; wherein, in the direction opposite to the insertion direction, the thickness of the first sealing strip gradually decreases, and / or, a chamfer, guide circle, or guide slope is provided on the outer side of the connection position between the first sealing strip and the connecting strip.

[0008] Furthermore, the first sealing strip includes a thick-walled portion and a thin-walled portion, and the connecting strip, the thick-walled portion and the thin-walled portion are connected in sequence. The thick-walled portion is interference-fitted with the inner wall of the box, and the thin-walled portion is clearance-fitted with the inner wall of the box.

[0009] Furthermore, the inner wall of the groove is coated with adhesive to bond it to the end of the lid.

[0010] Furthermore, the groove has opposing first inner walls and second inner walls, the first inner wall mates with the outer wall of the lid, and the second inner wall mates with the inner wall of the lid; wherein, the first inner wall and / or the second inner wall have barbed structures.

[0011] Furthermore, the sealing structure is a one-piece structure made of rubber.

[0012] Furthermore, the sealing structure is a sealing strip, which is fixed to the inner wall of the box or the outer wall of the box before the lid is inserted into the box body.

[0013] Furthermore, the battery box also includes a fastening structure located between the sealing structure and the opening of the box body. The fastening structure securely connects the side wall of the box body and the side wall of the box cover. There are multiple fastening structures, which are distributed along the circumference of the box body.

[0014] Furthermore, the fastening structure includes fastening bolts and fastening nuts. The fastening nuts are fixed to the box cover and do not protrude from the outer wall of the box cover. The fastening nuts have blind holes with internal threads. The side wall of the box body has through holes corresponding to the blind holes. The fastening bolts pass through the through holes into the blind holes and are threaded together.

[0015] Furthermore, the opening of the box body has a first inclined surface, and the outer wall of the box cover has a second inclined surface. Both the first and second inclined surfaces are inclined in the depth direction of the glue injection cavity. Before the glue injection cavity is filled with sealant, the first and second inclined surfaces are spaced apart, and a glue injection port communicating with the glue injection cavity is formed between the first and second inclined surfaces. Before the glue injection cavity is filled with sealant, the first and second inclined surfaces abut each other.

[0016] Furthermore, the lid and / or body of the box are sheet metal structures. The lid includes a top plate and a side plate surrounding the top plate. The side plate includes an outer plate, an inclined plate, and an inner plate connected in sequence. The outer plate and the inner plate are arranged in parallel. The second inclined surface is located on the inclined plate. The outer plate is located outside the box. The inner plate is inserted into the cavity of the box. An injection cavity is formed between the inner plate, the inclined plate, the sealing structure, and the outer wall of the lid.

[0017] According to another aspect of this application, a battery pack is provided, the battery pack including battery cells and the aforementioned battery housing, the battery cells being disposed within the cavity of the housing.

[0018] By applying the technical solution of this application, the sealing structure is arranged around the cover and sandwiched between the inner wall of the battery box and the outer wall of the cover. This enables the battery box to maintain its sealing performance and structural stability during long-term use. Furthermore, the sealant filled into the injection cavity provides a durable sealing effect, allowing the battery box to maintain a high level of protection under various environmental conditions. The sealing structure also prevents sealant leakage into the battery box. Moreover, the solution in this application eliminates the need for baffles or other structures, reducing manufacturing costs and assembly difficulty. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 A schematic diagram of the battery box structure of an embodiment of the present application is shown;

[0021] Figure 2 A cross-sectional view of the casing of an embodiment of the battery box of this application is shown;

[0022] Figure 3 A schematic diagram of the structure of the cover of an embodiment of the battery box of this application is shown;

[0023] Figure 4 A schematic diagram showing the glue injection between the casing and the cover of an embodiment of the battery box of this application is provided.

[0024] Figure 5 The diagram shows the completed installation of the battery box body and cover according to an embodiment of the present application.

[0025] The above figures include the following reference numerals:

[0026] 10. Box body; 11. First inclined plane;

[0027] 20. Box lid; 21. Second slope; 22. Top plate; 23. Side plate; 231. Outer panel; 232. Sloping plate; 233. Inner panel;

[0028] 30. Sealing structure; 31. First sealing strip; 32. Connecting strip; 33. Second sealing strip;

[0029] 40. Glue injection cavity;

[0030] 50. Sealant;

[0031] 61. First inner wall; 62. Second inner wall;

[0032] 70. Fastening structure; 71. Fastening bolt; 72. Fastening nut. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] like Figures 1 to 5 As shown, an embodiment of this application provides a battery box, including: a box body 10 having an opening; a box cover 20, at least a portion of which is inserted into the cavity of the box body 10 through the opening; and a sealing structure 30, at least a portion of which is sandwiched between the inner wall of the box body 10 and the outer wall of the box cover 20, and the sealing structure 30 is arranged around the box body 10. An annular injection cavity 40 is formed between the side of the sealing structure 30 facing the opening of the box body 10, the inner wall of the box body 10, and the outer wall of the box cover 20, and the injection cavity 40 is filled with sealant 50.

[0035] In this embodiment, the sealing structure 30 is arranged around the cover 20 and sandwiched between the inner wall of the box body 10 and the outer wall of the cover 20. This enables the box body 10 to maintain its sealing performance and structural stability during long-term use. Furthermore, the sealant 50 filled into the injection cavity 40 provides a durable sealing effect, allowing the battery box to maintain a high level of protection under various environmental conditions. The sealing structure also prevents sealant leakage into the box body 10. Moreover, the solution in this application does not require baffles or other structures, reducing manufacturing costs and assembly difficulty. The thickness of the injection cavity ranges from 0.3 to 5 mm, and the sealant 50 is a structural adhesive.

[0036] like Figure 4 and Figure 5 As shown, the sealing structure 30 includes a first sealing strip 31, a connecting strip 32, and a second sealing strip 33 connected in sequence. A groove is formed between the first sealing strip 31, the connecting strip 32, and the second sealing strip 33, and the end of the box cover 20 is inserted into the groove. The first sealing strip 31 is sandwiched between the inner wall of the box body 10 and the outer wall of the box cover 20.

[0037] In this embodiment, the sealing structure 30 includes a first sealing strip 31, a connecting strip 32, and a second sealing strip 33, forming multiple barriers to enhance sealing performance and effectively prevent external contaminants such as moisture, dust, and chemicals from entering the battery box. Furthermore, a groove is formed between the first sealing strip 31, the connecting strip 32, and the second sealing strip 33, allowing the end of the box cover 20 to be inserted into the groove, resulting in more uniform and stable contact between the box cover 20 and the sealing structure 30, further improving the sealing effect.

[0038] like Figure 4 and Figure 5 As shown, the sealing structure 30 is inserted into the cavity of the box body 10 along with the box cover 20; wherein, in the direction opposite to the insertion direction, the thickness of the first sealing strip 31 gradually decreases, and / or, a chamfer, guide circle or guide slope is provided on the outer side of the connection position between the first sealing strip 31 and the connecting strip 32.

[0039] In this embodiment, the thickness of the first sealing strip 31 gradually decreases in the direction opposite to the insertion direction, which can reduce the friction between the first sealing strip 31 and the inner wall of the box 10, thereby reducing the resistance during the assembly process, making it easier for the box cover 20 and the sealing structure 30 to be inserted into the box 10, avoiding damage or deformation to the first sealing strip 31, and ensuring that after insertion, the first sealing strip 31 can tightly fit the contact surface between the box 10 and the box cover 20, maintaining a good sealing effect.

[0040] Furthermore, the design of chamfers, guide circles, or guide bevels on the outer side of the connection position between the first sealing strip 31 and the connecting strip 32 can help the first sealing strip 31 to smoothly contact the inner wall of the housing 10, avoid jamming or deformation during assembly, and facilitate assembly.

[0041] like Figure 4 and Figure 5 As shown, the first sealing strip 31 includes a thick-walled portion and a thin-walled portion. The connecting strip 32, the thick-walled portion and the thin-walled portion are connected in sequence. The thick-walled portion is interference-fitted with the inner wall of the box 10, and the thin-walled portion is clearance-fitted with the inner wall of the box 10.

[0042] In this embodiment, by using an interference fit between the thick-walled portion of the first sealing strip 31 and the inner wall of the housing 10, a tight contact can be ensured between the first sealing strip 31 and the housing 10, thereby effectively improving the sealing performance. Conversely, a clearance fit between the thin-walled portion and the inner wall of the housing 10 reduces resistance during the insertion of the sealing structure 30. The interference fit between the thick-walled portion and the inner wall of the housing 10 is between 0.1 and 3 mm.

[0043] like Figure 5As shown, the inner wall of the groove is coated with adhesive to bond it to the end of the cover 20. In this embodiment, the adhesive coated on the inner wall of the groove forms an additional sealing layer, which fills any tiny gaps that may exist between the cover 20 and the sealing structure 30, further preventing moisture, dust, gas, or other contaminants from entering the battery box. It also ensures a tight bond with the end of the cover 20, guaranteeing that the cover 20 will not easily fall off or loosen after being inserted into the sealing structure 30.

[0044] like Figure 5 As shown, the groove has a first inner wall 61 and a second inner wall 62, the first inner wall 61 and the outer wall of the lid 20 are fitted together, and the second inner wall 62 and the inner wall of the lid 20 are fitted together; wherein, the first inner wall 61 and / or the second inner wall 62 have barbed structures.

[0045] In this embodiment, the barb structure can increase the stability between the cover 20 and the box body 10 by locking with the outer or inner wall of the cover 20, making it difficult for the cover 20 to be pulled out or loosened after being inserted into the groove. Even if it is affected by external vibration, pulling or pressure, it can prevent the cover 20 from falling off, thus improving the safety and stability of the battery box.

[0046] The sealing structure 30 is an integral structure made of rubber. In this embodiment, the sealing structure 30 is supported by rubber, which has good elasticity and adaptability, enabling it to form a tight contact surface with the cover 20 during assembly, further improving the sealing effect and thus enhancing the protection capability of the battery box. Furthermore, designing the sealing structure 30 as an integral structure simplifies the overall design of the battery box, reduces the number of additional components required for assembly, and thus lowers assembly difficulty and manufacturing costs.

[0047] In another embodiment not shown in this scheme, the sealing structure 30 is a sealing strip, which is fixed to the inner wall of the box body 10 or the outer wall of the box cover 20 before the box cover 20 is inserted into the box body 10.

[0048] The sealing structure 30 is fixed to the inner wall of the box body 10 or the outer wall of the box cover 20 before the cover is inserted into the box body 10. This ensures that the sealing structure 30 maintains an accurate position during assembly, thereby guaranteeing a tight seal between the sealing structure 30 and the box body 10 and the box cover 20. This prevents moisture, air, dust, and other substances from seeping into the box, improving the waterproof, dustproof, and airtight performance of the battery box. Furthermore, it reduces potential assembly errors, lowers labor intensity, and saves time and costs.

[0049] like Figure 1As shown, the battery box also includes a fastening structure 70, which is located between the sealing structure 30 and the opening of the box body 10. The fastening structure 70 fixes the side wall of the box body 10 and the side wall of the box cover 20. There are multiple fastening structures 70, which are distributed along the circumference of the box body 10.

[0050] In this embodiment, multiple fastening structures 70 are distributed circumferentially along the casing 10, which enhances the connection strength between the casing 10 and the cover 20, preventing deformation of the casing 10 or loosening of the cover 20 due to weak local connections. Furthermore, the fastening structures 70 and the sealing structure 30 work together to ensure a tighter and more stable sealing contact between the casing 10 and the cover 20, further improving the sealing performance of the battery box. Moreover, the combined effect of the fastening structures 70 and the sealing structure 30 enhances the protection level of the battery box. In this embodiment, the fastening structure 70 is positioned between the sealing structure 30 and the opening of the casing 10, without affecting the sealing effect of the sealing structure 30 on the battery box.

[0051] like Figure 3 As shown, the fastening structure 70 includes a fastening bolt 71 and a fastening nut 72. The fastening nut 72 is fixed to the cover 20 and does not protrude from the outer wall of the cover 20. The fastening nut 72 has a blind hole with an internal thread. The side wall of the box body 10 has a through hole corresponding to the blind hole. The fastening bolt 71 passes through the through hole into the blind hole and is threaded.

[0052] In this embodiment, the fastening nut 72 is fixed to the cover 20 but does not protrude from the outer wall of the cover 20. This makes the battery box appearance smoother and simpler, and avoids potential safety hazards or collision damage caused by a protruding fastening nut 72. It also eliminates gaps on the outer wall of the cover 20 that could cause water leakage, further improving the battery box's waterproof performance. Furthermore, the fastening nut 72 has a blind hole with threads. The fastening bolt 71 passes through a through hole on the side wall of the box body 10 corresponding to the blind hole and is threaded, firmly fixing the box body 10 and the cover 20 together. This ensures a more stable connection between the box body and the cover, preventing loosening or leakage due to external impacts. The blind hole in the fastening nut 72 prevents the through holes on the side wall of the box body 10 from communicating with the inside of the battery box, thus not affecting the sealing effect. The fastening bolt 71 is a countersunk bolt, and the fastening nut 72 is a closed-end press-fit nut.

[0053] like Figure 4 and Figure 5As shown, the opening of the box body 10 has a first inclined surface 11, and the outer wall of the box cover 20 has a second inclined surface 21. Both the first inclined surface 11 and the second inclined surface 21 are inclined in the depth direction of the glue injection cavity 40. Before the glue injection cavity 40 is injected with sealant 50, the first inclined surface 11 and the second inclined surface 21 are spaced apart, and a glue injection port communicating with the glue injection cavity 40 is formed between the first inclined surface 11 and the second inclined surface 21. Before the glue injection cavity 40 is injected with sealant 50, the first inclined surface 11 and the second inclined surface 21 abut against each other.

[0054] In this embodiment, by forming an injection port between the first inclined surface 11 and the second inclined surface 21, a convenient entry point is provided during the injection process, allowing the sealant 50 to enter the injection cavity 40 quickly and evenly. This results in a more uniform distribution of the sealant 50 throughout the cavity, reducing flow resistance and ensuring efficient and precise injection. Furthermore, since both the first inclined surface 11 and the second inclined surface 21 are inclined towards the depth direction of the injection cavity 40, the sealant 50 can quickly fill the depth region of the injection cavity 40 after injection, preventing overflow or uneven distribution of the sealant 50 during injection and ensuring the airtightness of the battery box. Furthermore, before injecting sealant 50 into the injection cavity 40, the first inclined surface 11 and the second inclined surface 21 abut against each other, which can seal the injection cavity 40 before injection, preventing moisture, air, dust and other substances from seeping into the box before injection. At the same time, it can also position the box body 10 and the box cover 20, ensuring the accurate positioning of the box body 10 and the box cover 20 in subsequent operations.

[0055] During the glue injection process, first, press down the cover 20, which holds the sealing structure 30 in place, a certain distance along the glue injection direction, leaving the boundary of the glue injection port. The pressing distance should be such that the sealing structure 30 is 2-10mm lower than the blind hole of the fastening nut on the side of the housing 10. Then, align the outlet of the glue injector with the glue injection port and evenly inject the sealant 50 into the glue injection cavity 40 from the glue injection port. After the glue injection is completed, continue pressing down the cover 20 along the glue injection direction until the cover 20 abuts against the housing 10, sealing the glue injection port. The glue injection height should be between 1-20mm.

[0056] like Figure 4 and Figure 5 As shown, the lid 20 and / or the body 10 are sheet metal structures. The lid 20 includes a top plate 22 and a side plate 23 surrounding the top plate 22. The side plate 23 includes an outer plate 231, an inclined plate 232, and an inner plate 233 connected in sequence. The outer plate 231 and the inner plate 233 are arranged in parallel. The second inclined surface 21 is located on the inclined plate 232. The outer plate 231 is located outside the body 10. The inner plate 233 is inserted into the cavity of the body 10. An injection cavity 40 is formed between the inner plate 233, the inclined plate 232, the sealing structure 30, and the outer wall of the lid 20.

[0057] In this embodiment, the casing 10 and / or the cover 20 are made of sheet metal. Sheet metal has high strength and rigidity, ensuring the stability of the cover 20 and casing 10 during long-term use and preventing deformation or damage to the battery box due to external pressure or impact. Furthermore, the outer plate 231, the inclined plate 232, and the inner plate 233 are connected sequentially, providing good load-bearing capacity and resistance to deformation. Inserting the inner plate 233 into the cavity of the casing 10 makes the cover 20 less prone to deformation under external force, improving the battery box's pressure resistance and durability. Moreover, the glue injection cavity 40 formed between the inner plate 233, the inclined plate 232, the sealing structure 30, and the outer wall of the cover prevents deformation or damage to the glue injection cavity 40 under certain circumstances, thereby avoiding the risk of sealant 50 leakage and contamination of the battery box interior. Meanwhile, the second inclined surface 21 on the inclined plate 232 can make the sealant 50 flow more smoothly during the injection process, avoiding uneven injection. It can also better guide the flow path of the sealant 50, ensuring that the sealant in the injection cavity 40 can be completely filled, avoiding unnecessary waste.

[0058] Furthermore, the battery pack includes battery cells and the aforementioned battery case, with the battery cells disposed within the cavity of the case 10.

[0059] In this embodiment, by placing the battery cell inside the battery box cavity, damage to the battery cell caused by external impacts during use is avoided, as well as the infiltration of moisture, air, dust, and other substances into the box, reducing the risk of internal short circuits or battery damage. Furthermore, since the sealing structure 30, together with the box body 10 and the box cover 20, forms the sealant injection cavity 40, it effectively prevents sealant leakage. Therefore, it is unnecessary to weld sealant-blocking welding rods or other structures around the box body 10, reducing manufacturing costs and assembly difficulty.

[0060] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0061] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0062] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery box characterized by, The battery box comprises: a box body (10) having an opening; a box cover (20) at least a part of which is inserted into the cavity of the box body (10) from the opening of the box body (10); a sealing structure (30) at least a part of which is clamped between the inner wall of the box body (10) and the outer wall of the box cover (20), and which is arranged around the box body (10), and which forms an annular glue injection cavity (40) between the side of the box body (10) facing the opening, the inner wall of the box body (10) and the outer wall of the box cover (20), and the glue injection cavity (40) is filled with sealing glue (50).

2. The battery pack of claim 1, wherein, The sealing structure (30) comprises a first sealing strip (31), a connecting strip (32) and a second sealing strip (33) connected in sequence, a groove is formed between the first sealing strip (31), the connecting strip (32) and the second sealing strip (33), and the end of the box cover (20) is inserted into the groove; wherein the first sealing strip (31) is clamped between the inner wall of the box body (10) and the outer wall of the box cover (20).

3. The battery pack of claim 2, wherein, The sealing structure (30) is inserted into the cavity of the box body (10) along with the box cover (20); wherein the thickness of the first sealing strip (31) gradually decreases in the direction opposite to the insertion direction, and / or the outer side of the connecting position of the first sealing strip (31) and the connecting strip (32) is provided with a chamfer or a fillet or a guide slope.

4. The battery pack of claim 2, wherein, The first sealing strip (31) comprises a thick wall part and a thin wall part, and the connecting strip (32), the thick wall part and the thin wall part are connected in sequence, wherein the thick wall part is in interference fit with the inner wall of the box body (10), and the thin wall part is in clearance fit with the inner wall of the box body (10).

5. The battery pack of claim 2, wherein, The inner wall of the groove is coated with adhesive to bond with the end of the box cover (20).

6. The battery pack of claim 2, wherein, The groove has opposite first and second inner walls (61) and (62), the first inner wall (61) cooperates with the outer wall of the box cover (20), and the second inner wall (62) cooperates with the inner wall of the box cover (20); wherein the first inner wall (61) and / or the second inner wall (62) has a barb structure.

7. The battery pack of claim 2, wherein, The sealing structure (30) is an integral structure, and is made of rubber.

8. The battery pack of claim 1, wherein, The sealing structure (30) is a sealing strip, which is fixed to the inner wall of the box body (10) or the outer wall of the box cover (20) before the box cover (20) is inserted into the box body (10).

9. The battery pack of claim 1, wherein, The battery box further comprises a fastening structure (70) located between the sealing structure (30) and the opening of the box body (10), which fixedly connects the side wall of the box body (10) and the side wall of the box cover (20); the fastening structure (70) is a plurality of, and the plurality of fastening structures (70) are distributed along the circumference of the box body (10).

10. The battery pack of claim 9, wherein, The fastening structure (70) comprises a fastening bolt (71) and a fastening nut (72), the fastening nut (72) is fixed to the box cover (20), and the fastening nut (72) does not protrude from the outer wall of the box cover (20), the fastening nut (72) has a blind hole with an internal thread, the side wall of the box body (10) has a through hole corresponding to the blind hole, and the fastening bolt (71) penetrates the through hole into the blind hole and is threadedly connected.

11. The battery pack of claim 1, wherein, The box body (10) has a first inclined surface (11) at the opening, and the outer wall of the box cover (20) has a second inclined surface (21), both the first inclined surface (11) and the second inclined surface (21) are inclined to the depth direction of the glue injection cavity (40); wherein, before the glue injection cavity (40) is injected with the sealant (50), the first inclined surface (11) and the second inclined surface (21) are spaced apart, and the first inclined surface (11) and the second inclined surface (21) form a glue injection port in communication with the glue injection cavity (40), and the first inclined surface (11) and the second inclined surface (21) abut before the glue injection cavity (40) is injected with the sealant (50).

12. The battery pack of claim 11, wherein, The box cover (20) and / or the box body (10) are sheet metal structures, the box cover (20) comprises a top plate (22) and a side plate (23) surrounding the top plate (22), the side plate (23) comprises an outer plate body (231), an inclined plate body (232) and an inner plate body (233) connected in sequence, wherein the outer plate body (231) and the inner plate body (233) are arranged in parallel, the second inclined surface (21) is located in the inclined plate body (232), the outer plate body (231) is located outside the box body (10), the inner plate body (233) is inserted into the cavity of the box body (10), and the inner plate body (233), the inclined plate body (232), the sealing structure (30) and the outer wall of the box cover (20) form the glue injection cavity (40).

13. A battery pack, characterized by, The battery pack comprises a battery cell and the battery box of any one of claims 1-12, and the battery cell is arranged in the cavity of the box body (10).

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