Waterproof structure and battery pack

Abstract

The utility model discloses a waterproof structure and a battery pack, and relates to the technical field of battery waterproofing. The waterproof structure comprises a shell, a structural member and a sealing ring. The shell comprises an upper cover body and a lower shell body, and the upper cover body and the lower shell body can be buckled with each other in a first direction to form an accommodating space; the structural part is located in the containing space and connected with the upper cover body and the lower shell body, a concave part is annularly arranged on the structural part in the circumferential direction, and the concave part, the upper cover body and the lower shell body jointly form a sealed space; the sealing ring is located in the sealing space and abuts against the upper cover body and the lower shell body. By adopting the technology provided by the utility model, the volume energy density of the battery can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery waterproofing, and particularly to a waterproof structure and a battery pack. Background Art

[0002] A sheet metal shell battery refers to a battery shell manufactured by sheet metal technology, which is commonly used in fields such as electric vehicles. Currently, the waterproof structure of a sheet metal shell battery generally requires a horizontal flanging structure to be made on the shell, a sealing ring to be added at the horizontal flanging structures of the upper and lower shells, and screws to be tightened to achieve the waterproofing of the battery.

[0003] However, in fields such as electric vehicles, the capacity space for placing batteries is limited. The horizontal flanging structure will occupy a certain space, thereby reducing the volume energy density of the battery. Based on this, some manufacturers use the form of filling sealant between the upper and lower shells to avoid using sealing rings, but this method greatly affects the subsequent maintenance, disassembly, and assembly work of the battery. Summary of the Utility Model

[0004] The utility model provides a waterproof structure and a battery to solve the problem in the prior art that the horizontal flanging structure needs to occupy a certain space, resulting in a relatively low volume energy density of the battery.

[0005] To solve the above technical problems, on the one hand, the technical solution adopted by the utility model is to provide a waterproof structure, which includes: a housing, a structural member, and a sealing ring.

[0006] The housing includes an upper cover body and a lower housing. The upper cover body and the lower housing can be buckled with each other along a first direction to form an accommodating space. The structural member is located in the accommodating space and is respectively connected to the upper cover body and the lower housing. Among them, the structural member is circumferentially provided with a concave portion, and the concave portion and the upper cover body and the lower housing jointly form a sealing space. The sealing ring is located in the sealing space and is respectively in contact with the upper cover body and the lower housing.

[0007] The beneficial effects brought by the technical solution provided by the utility model compared with the prior art are:

[0008] By arranging the structural member in the accommodating space inside the housing to cancel the horizontal flanging structure, that is, the housing no longer has an outward protruding structure, so that adjacent batteries can be more closely attached to improve the volume energy density of the battery.

[0009] Among them, the structural member is circumferentially provided with a concave portion to jointly form a sealing space for accommodating the sealing ring with the housing, so that the sealing ring is respectively in contact with the upper cover body and the lower housing, thereby realizing effective waterproofing between the upper cover body, the lower housing, and the structural member.

[0010] In some embodiments, the sealed space includes an inclined groove that is inclined in the first direction, and the included angle formed by the inclined surface of the inclined groove and the inner wall of the lower housing is an acute angle. Wherein, the sealing ring includes a first pressing portion, and the first pressing portion is located in the inclined groove and abuts against the inner wall of the lower housing and the structural member respectively.

[0011] With the above technical solution, by adding an inclined surface on the outer ring side of the structural member, an inclined groove can be formed between it and the inner wall of the lower housing to accommodate the first pressing portion of the sealing ring. Thus, when the structural member is locked with the upper cover and the lower housing respectively, and the sealing ring bears the pressure in the first direction (vertical direction), the inclined surface will exert a lateral reaction force on the sealing ring, thereby pressing the sealing ring tightly in the housing and improving the waterproof effect.

[0012] In some embodiments, the structural member is provided with a first stud and a second stud. The first stud is located on the top surface of the structural member along the first direction and faces the side of the upper cover, and is used to connect with the upper cover; the second stud is located on the side surface of the structural member along the second direction and faces the side of the lower housing, and is used to connect with the lower housing.

[0013] With the above technical solution, since there is no horizontal flanging structure, the upper cover and the lower housing cannot lock and press the sealing ring along the first direction. Therefore, the first stud and the second stud are added to lock the structural member and press the sealing ring along the first direction (vertical direction) and the second direction (horizontal direction).

[0014] Further, the sealing ring is sleeved on the outer ring sides of the first stud and the second stud respectively, so as to prevent water or other liquids from infiltrating into the accommodating space along the first stud and the second stud.

[0015] In some embodiments, a plurality of ribs are circumferentially arranged on the outer ring side of the sealing ring, and the plurality of ribs are arranged at intervals along the first direction. Wherein, the plurality of ribs abut against the inner wall of the lower housing.

[0016] With the above technical solution, by arranging a plurality of ribs on the outer ring side of the sealing ring, the sealing performance of the waterproof structure can be effectively improved, and phenomena such as displacement or circumferential rotation of the sealing ring during installation can be prevented.

[0017] Further, the rib is serrated or arc-shaped. By setting the rib as serrated or arc-shaped, a plurality of pressing planes can be formed during pressing to increase the stability and reliability of the seal.

[0018] In some embodiments, the sealing ring further includes a second pressing portion, and the second pressing portion is located between the upper cover and the lower housing along the first direction and abuts against the upper cover and the lower housing respectively.

[0019] In some embodiments, the sealing ring further includes a third pressing portion, which is located between the upper cover body and the structural member along the first direction and abuts against the upper cover body and the structural member respectively.

[0020] Adopting the above technical solution to ensure that the sealing ring can effectively waterproof between the upper cover body and the lower housing and between the upper cover body and the structural member.

[0021] In some embodiments, the outer wall of the upper cover body or the lower housing is a smooth plane.

[0022] Adopting the above technical solution, the smooth plane is not easy to accumulate dust and dirt and has a higher aesthetic degree. Secondly, the smooth outer wall of the housing can also make the batteries fit tightly together to improve the volume energy density of the batteries and reduce space waste.

[0023] On the other hand, the present application also provides a battery pack, including the above waterproof structure and battery cells, wherein the battery cells are located in the accommodation space formed by the upper cover body and the lower housing.

[0024] Adopting the above technical solution, the battery adopts a waterproof structure, which can effectively improve the waterproof property of the battery, increase the number of batteries that can be accommodated in the same battery unit space, improve the space utilization rate and volume energy density of the battery unit. Among them, the above battery does not use sealant, which can effectively improve the convenience of after-sales maintenance and is suitable for a variety of electric vehicles or energy storage systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0026] Figure 1 is an exploded view of an embodiment of a waterproof structure provided by the present invention;

[0027] Figure 2 is a schematic plan view of an embodiment of a waterproof structure provided by the present invention;

[0028] Figure 3 is Figure 2 a partial enlarged view of part B in

[0029] Figure 4 is a cross-sectional view of an embodiment of the sealing ring of a waterproof structure provided by the present invention;

[0030] Figure 5 It is a partial structural schematic diagram of an embodiment of a structural member of a waterproof structure provided by the present utility model;

[0031] Figure 6 is Figure 1 The partial structural enlarged view of part A in

[0032] In the figure:

[0033] Housing - 10; Upper cover - 11; Lower housing - 12; Accommodation space - 13; Sealing space - 14; Inclined groove - 15;

[0034] Structural member - 20; Concave part - 21; Inclined surface - 210; First stud - 22; Second stud - 23; Sealing ring - 30; First pressing part - 31; Second pressing part - 32; Third pressing part - 33; Rib - 34. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0036] For the convenience of subsequent description, before describing the specific structures of the waterproof structure and the battery pack, the present application first combines Figure 1 Define the first direction (Z) and the second direction (X or Y). Among them, the first direction is the height direction of the battery pack when it is placed normally, for example, the Z direction; the second direction is the horizontal direction when it is placed normally, for example, the width (X) or length (Y) direction.

[0037] See Figures 1 to 3 as shown Figure 1 shows an exploded view of an embodiment of a waterproof structure provided by the present application; Figure 2 shows a planar structural schematic diagram of an embodiment of a waterproof structure provided by the present application; Figure 3 is Figure 2 The partial structural enlarged view of part B in

[0038] In some embodiments, the waterproof structure includes: a housing 10, a structural member 20, and a sealing ring 30. The housing 10 includes an upper cover 11 and a lower housing 12. The upper cover 11 and the lower housing 12 can be buckled with each other along the first direction and form an accommodation space 13; the structural member 20 is located in the accommodation space 13 and is respectively connected to the upper cover 11 and the lower housing 12.

[0039] Wherein, the structural member 20 is circumferentially provided with a recess 21, and the recess 21 and the upper cover body 11 and the lower housing 12 together form a sealed space 14; the sealing ring 30 is located in the sealed space 14 and abuts against the upper cover body 11 and the lower housing 12 respectively.

[0040] In the embodiment of the present application, by arranging the structural member 20 in the accommodation space 13 inside the housing 10, the horizontal flanging structure is cancelled, that is, the housing 10 no longer has an extended convex structure, so that adjacent batteries can be more closely attached, thereby improving the volumetric energy density of the battery.

[0041] Exemplarily, the outer wall of the upper cover body 11 or the lower housing 12 is a smooth plane (as Figure 2 shown), and the smooth plane is not easy to accumulate dust and dirt, and also has a higher aesthetic degree. Secondly, the smooth outer wall of the housing 10 can also make the batteries closely attached to each other, so as to improve the volumetric energy density of the battery and reduce space waste.

[0042] Wherein, the structural member 20 is circumferentially provided with a recess 21 to jointly form a sealed space 14 for accommodating the sealing ring 30 with the housing 10, so that the sealing ring 30 abuts against the upper cover body 11 and the lower housing 12 respectively, so as to achieve effective waterproofing between the upper cover body 11, the lower housing 12 and the structural member 20.

[0043] Combined with Figure 4 shown, Figure 4 A cross-sectional view of an embodiment of the sealing ring 30 of a waterproof structure provided by the present application is shown.

[0044] In some embodiments, combined with Figure 3 and Figure 4 shown, the sealed space 14 includes an inclined groove 15 inclined in the first direction, and the included angle formed by the inclined surface 210 of the inclined groove 15 and the inner wall of the lower housing 12 is an acute angle. Wherein, the sealing ring 30 includes a first pressing portion 31, and the first pressing portion 31 is located in the inclined groove 15 and abuts against the inner wall of the lower housing 12 and the structural member 20 respectively.

[0045] In the embodiment of the present application, by adding an inclined surface 210 on the outer ring side of the structural member 20, it can form an inclined groove 15 with the inner wall of the lower housing 12 to accommodate the first pressing portion 31 of the sealing ring 30. Thus, when the structural member 20 is locked with the upper cover body 11 and the lower housing 12 respectively, and the sealing ring 30 bears the pressure in the first direction (vertical direction), the inclined surface 210 will apply a lateral reaction force to the sealing ring 30, and further make the sealing ring 30 pressed tightly inside the housing 10, improving the waterproof effect.

[0046] In some embodiments, the sealing ring 30 further includes a second pressing portion 32. The second pressing portion 32 is located between the upper cover body 11 and the lower housing 12 along the first direction and abuts against the upper cover body 11 and the lower housing 12 respectively.

[0047] In some embodiments, the sealing ring 30 further includes a third pressing portion 33. The third pressing portion 33 is located between the upper cover body 11 and the structural member 20 along the first direction and abuts against the upper cover body 11 and the structural member 20 respectively.

[0048] In the embodiments of the present application, the sealing ring 30 having the first pressing portion 31, the second pressing portion 32 and the third pressing portion 33 is adopted to ensure that the sealing ring 30 can achieve effective waterproofing between the upper cover body 11 and the lower housing 12 and between the upper cover body 11 and the structural member 20.

[0049] See Figure 5 as shown Figure 5 which shows a partial structural schematic diagram of an embodiment of the structural member 20 of a waterproof structure provided by the present application.

[0050] In some embodiments, the structural member 20 is provided with a first stud 22 and a second stud 23. The first stud 22 is located on the top surface of the structural member 20 along the first direction and faces the side of the upper cover body 11 for connecting with the upper cover body 11; the second stud 23 is located on the side surface of the structural member 20 along the second direction and faces the side of the lower housing 12 for connecting with the lower housing 12.

[0051] In the embodiments of the present application, since there is no horizontal flanging structure, the upper cover body 11 and the lower housing 12 cannot lock and compress the sealing ring 30 along the first direction. Therefore, the first stud 22 and the second stud 23 are added to lock the structural member 20 and compress the sealing ring 30 along the first direction (vertical direction) and the second direction (horizontal direction). Exemplarily, in combination with Figure 1 as shown, the first stud 22 is circumferentially arranged around the top of the structural member 20, and the second stud 23 is circumferentially arranged around the outer periphery of the structural member 20.

[0052] In combination with Figure 6 as shown Figure 6 is Figure 1 a partial enlarged structural view of part A in

[0053] In some embodiments, the sealing ring 30 is respectively sleeved on the outer sides of the first stud 22 and the second stud 23 to prevent water or other liquids from seeping into the accommodation space 13 along the first stud 22 and the second stud 23. Exemplarily, in combination with Figure 5 and Figure 6 as shown, the sealing ring 30 is provided with a plurality of sleeve holes located at the top and the outer periphery of the sealing ring 30 to be sleeved with the first stud 22 and the second stud 23 of the structural member 20.

[0054] In some embodiments, a plurality of ribs 34 are circumferentially provided along the outer circumferential side of the sealing ring 30. The plurality of ribs 34 are spaced apart in a first direction, and among them, the plurality of ribs 34 are in contact with the inner wall of the lower housing 12.

[0055] In the embodiment of the present application, by providing a plurality of ribs 34 on the outer circumferential side of the sealing ring 30, the sealing performance of the waterproof structure can be effectively improved, and phenomena such as displacement or circumferential rotation of the sealing ring 30 during installation can be prevented. Exemplarily, the rib 34 is located at the first pressing portion 31.

[0056] Further, the rib 34 is serrated or arc-shaped. By setting the rib 34 to be serrated or arc-shaped, a plurality of pressing planes can be formed during pressing, so as to increase the stability and reliability of the seal.

[0057] In some embodiments, the present application further provides a battery pack, including the above-mentioned waterproof structure and battery cells, wherein the battery cells are located in the accommodation space 13 formed by the upper cover body 11 and the lower housing 12.

[0058] In the embodiment of the present application, the battery adopts a waterproof structure, which can effectively improve the waterproof property of the battery, increase the number of batteries that can be accommodated in the same battery unit space, and improve the space utilization rate and volume energy density of the battery unit. Among them, the above battery does not use sealant, which can effectively improve the convenience of after-sales maintenance and is suitable for a variety of electric vehicles or energy storage systems.

[0059] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall fall within the protection scope of the present invention.

Claims

1. A waterproof structure, characterized in that: include: A housing, the housing comprising an upper cover and a lower housing, the upper cover and the lower housing being able to be buckled with each other along a first direction to form an accommodating space; A structural member, the structural member is located in the accommodating space and is connected to the upper cover body and the lower shell body respectively, wherein the structural member is provided with a recessed portion along the circumferential direction, and the recessed portion, the upper cover body and the lower shell body together form a sealed space; A sealing ring is located in the sealed space and abuts against the upper cover and the lower shell respectively.

2. The waterproof structure according to claim 1, characterized in that: The sealing space includes an inclined groove inclined along the first direction, and the angle formed by the inclined surface of the inclined groove and the inner wall of the lower shell is an acute angle, wherein the sealing ring includes a first pressing portion, which is located in the inclined groove and abuts against the inner wall of the lower shell and the structural member respectively.

3. The waterproof structure according to claim 1, characterized in that: The structural member is provided with a first stud and a second stud. The first stud is located on the top surface of the structural member along the first direction and faces one side of the upper cover body for connection with the upper cover body; the second stud is located on the side of the structural member along the second direction and faces one side of the lower shell for connection with the lower shell.

4. The waterproof structure according to claim 3, characterized in that: The sealing rings are respectively sleeved on the outer ring sides of the first stud and the second stud.

5. The waterproof structure according to any one of claims 1 to 2, characterized in that: The outer ring side of the sealing ring is provided with a plurality of convex ribs along the circumferential direction, and the plurality of convex ribs are arranged at intervals along the first direction, wherein the plurality of convex ribs abut against the inner wall of the lower shell.

6. The waterproof structure according to claim 5, characterized in that: The convex rib is in a sawtooth shape or an arc shape.

7. The waterproof structure according to claim 1, characterized in that: The sealing ring further includes a second pressing portion, which is located between the upper cover body and the lower shell body along the first direction and abuts against the upper cover body and the lower shell body respectively.

8. The waterproof structure according to claim 1, characterized in that: The sealing ring further includes a third pressing portion, which is located between the upper cover body and the structural member along the first direction and abuts against the upper cover body and the structural member respectively.

9. The waterproof structure according to claim 1, characterized in that: The outer wall of the upper cover or the lower shell is a smooth plane.

10. A battery pack, characterized in that: It comprises the waterproof structure and battery cell according to any one of claims 1 to 9, wherein the battery cell is located in a containing space formed by an upper cover body and a lower shell body.

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