Battery pack with good waterproof performance

Abstract

The utility model discloses a battery pack with good waterproof performance. The battery pack comprises a main shell, an upper cover and a sealing ring, the main shell comprises a bottom plate and a first peripheral side plate arranged on the periphery of the edge of the bottom plate. The upper cover comprises a top plate and a second peripheral side plate arranged around the edge of the top plate. When the upper cover is connected with the main shell, the first peripheral side plate and the second peripheral side plate are sequentially arranged in the thickness direction of the first peripheral side plate, and the sealing ring is arranged between the first peripheral side plate and the second peripheral side plate and seals a gap between the first peripheral side plate and the second peripheral side plate. According to the battery pack with the good waterproof performance, the first peripheral side plate and the second peripheral side plate are sequentially arranged in the thickness direction of the first peripheral side plate, the sealing ring is arranged in the gap between the first peripheral side plate and the second peripheral side plate, the size of the sealing ring is small, sealing failure caused by deformation of upper and lower contact surfaces is avoided in a radial extrusion mode, and the waterproof performance of the battery pack is improved. And the pressure of the sealing surface is increased along with the increase of the internal and external pressure difference, so that the sealing effect is met under the condition of larger pressure difference, and the sealing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack with good waterproof performance. Background Art

[0002] A battery pack is usually composed of a main shell, a plurality of battery cells, an upper cover and a sealing ring. Each battery cell is arranged in the main shell, and the upper cover is arranged at the upper opening of the main shell. The upper cover and the main shell of the existing battery pack are snap-fitted. The main shell includes a bottom plate and a first peripheral side plate arranged around the edge of the bottom plate, and the first peripheral side plate has an upper end surface. The upper cover has a top plate and a second peripheral side plate arranged around the edge of the top plate, and the second peripheral side plate has a lower end surface. When the upper cover and the main shell are snap-fitted, the upper end surface and the lower end surface are positioned relative to each other, and the sealing ring can be arranged on the upper end surface and / or the lower end surface to seal the gap between the upper end surface and the lower end surface to prevent external liquid from penetrating into the shell and damaging the battery cell. The sealing of the sealing ring requires a larger width and thickness, which are not available in small battery packs. In addition, this sealing structure relies on the downward force of the upper cover toward the main shell to compress the sealing roll. When the opening of the upper cover or the main shell is deformed, or there are impurities between the upper and lower end surfaces, the upper cover may be loose, resulting in failure of the sealing ring or poor sealing effect.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides a battery pack with good waterproof performance.

[0005] The utility model adopts the following technical solutions:

[0006] A battery pack with good waterproof performance, comprising:

[0007] A main shell, the main shell comprising a bottom plate and a first peripheral side plate arranged around the edge of the bottom plate, the first peripheral side plate being perpendicular to the bottom plate;

[0008] An upper cover, the upper cover comprising a top plate and a second peripheral side plate arranged around the edge of the top plate, the second peripheral side plate being perpendicular to the top plate;

[0009] A sealing ring, when the upper cover and the main shell are connected, the first circumferential side plate and the second circumferential side plate are arranged in sequence along the thickness direction of the first circumferential side plate, and the sealing ring is arranged between the first circumferential side plate and the second circumferential side plate, and closes the gap between the first circumferential side plate and the second circumferential side plate.

[0010] Optionally, a first annular end surface is provided at one end of the first peripheral side plate away from the bottom plate;

[0011] The second peripheral side plate comprises an annular main plate and an annular sub-plate, the annular main plate is connected to the top plate, and a second annular end surface is arranged at one end of the annular main plate away from the top plate;

[0012] The annular sub-plate has a thickness smaller than that of the annular main plate, and the annular sub-plate is connected to the inner side surface of the second annular end surface;

[0013] When the main shell and the upper cover are connected, the first annular end face is attached to the second annular end face, the first circumferential side plate and the annular sub-plate are arranged in sequence along the thickness direction of the first circumferential side plate, and the sealing ring is arranged between the first circumferential side plate and the annular sub-plate to close the gap between the first circumferential side plate and the annular sub-plate.

[0014] Optionally, when the main shell and the upper cover are connected, the sealing ring also closes the gap between the first annular end surface and the second annular end surface.

[0015] Optionally, the sealing ring is arranged at an angle between the second annular end surface and the outer side surface of the annular sub-plate.

[0016] Optionally, an annular groove is provided on the second peripheral side plate;

[0017] The annular groove is at least located on the annular sub-plate;

[0018] The sealing ring is confined in the annular groove.

[0019] Optionally, the annular groove is partially located on the outer side surface of the annular sub-plate, and partially located on the second annular end surface;

[0020] The sealing ring is partially embedded in the annular groove and partially extends out of the annular groove.

[0021] Optionally, the first annular end surface and the inner side surface of the first peripheral side plate are smoothly transitioned through an arc surface.

[0022] Optionally, a limiting portion is provided on a side of the second annular end surface away from the annular sub-plate;

[0023] The limiting portion is limited to a side of the sealing ring away from the annular sub-plate.

[0024] Optionally, the limiting portion is provided on a partial end face section of the second annular end face;

[0025] The limiting portion is extended along the length direction of the second annular end surface.

[0026] Optionally, a smooth arc surface is provided on a side of the limiting portion facing the sealing ring.

[0027] By adopting the above technical solution, the utility model has the following beneficial effects:

[0028] The first peripheral side plate and the second peripheral side plate of the battery pack with good waterproof performance of the present application are arranged in sequence along the thickness direction of the first peripheral side plate, and the sealing ring is arranged in the gap between the first peripheral side plate and the second peripheral side plate. The sealing ring is small in size and will not cause sealing failure due to deformation of the upper and lower contact surfaces through radial extrusion. The sealing effect increases with the increase of the internal and external pressure difference, and the sealing surface pressure increases accordingly, ensuring that the sealing effect is met under a larger pressure difference, and the sealing effect is good.

[0029] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 A cross-sectional view of a battery pack with good waterproof performance provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0033] Figure 3 A schematic diagram of the structure of a battery pack with good waterproof performance provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the structure of the upper cover and the sealing ring of the battery pack with good waterproof performance provided in an embodiment of the present application;

[0035] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0036] In the figure, the main shell 1, the bottom plate 15, the first peripheral side plate 14, the first annular end face 141, the upper cover 5, the top plate 51, the second peripheral side plate 52, the annular main plate 521, the second annular end face 5211, the limiting portion 5211a, the annular sub-plate 522, the annular groove 523, and the sealing ring 8.

[0037] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] See also Figures 1 to 5 As shown, an embodiment of the present application provides a battery pack with good waterproof performance, including: a main shell 1, an upper cover 5 and a sealing ring 8. The main shell 1 includes a bottom plate 15 and a first peripheral side plate 14 arranged around the edge of the bottom plate 15, and the first peripheral side plate 14 is perpendicular to the bottom plate 15. The upper cover 5 includes a top plate 51 and a second peripheral side plate 52 arranged around the edge of the top plate 51, and the second peripheral side plate 52 is perpendicular to the top plate 51. When the upper cover 5 and the main shell 1 are connected, the first peripheral side plate 14 and the second peripheral side plate 52 are arranged in sequence along the thickness direction of the first peripheral side plate 14, and the sealing ring 8 is arranged between the first peripheral side plate 14 and the second peripheral side plate 52, and closes the gap between the first peripheral side plate 14 and the second peripheral side plate 52. The first peripheral side plate 14 and the second peripheral side plate 52 of the battery pack with good waterproof performance of the present application are arranged in sequence along the thickness direction of the first peripheral side plate 14, and the sealing ring 8 is arranged in the gap between the first peripheral side plate 14 and the second peripheral side plate 52. The sealing ring 8 is small in size and will not cause sealing failure due to deformation of the upper and lower contact surfaces (such as the upper and lower end surfaces) through radial extrusion. The sealing effect increases with the increase of the internal and external pressure difference, and the sealing surface pressure increases accordingly, ensuring that the sealing effect is met under a larger pressure difference, and the sealing effect is good.

[0042] like Figure 1 and Figure 2As shown, the first peripheral side plate 14 is provided with a first annular end face 141 at one end away from the bottom plate 15. The second peripheral side plate 52 includes an annular main plate 521 and an annular sub-plate 522, the annular main plate 521 is connected to the top plate 51, and the second annular end face 5211 is provided at one end of the annular main plate 521 away from the top plate 51. The thickness of the annular sub-plate 522 is less than that of the annular main plate 521, and the annular sub-plate 522 is connected to the inner side of the second annular end face 5211. When the main shell 1 and the upper cover 5 are connected, the first annular end face 141 is attached to the second annular end face 5211, the first peripheral side plate 14 and the annular sub-plate 522 are arranged in sequence along the thickness direction of the first peripheral side plate 14, and the sealing ring 8 is provided between the first peripheral side plate 14 and the annular sub-plate 522 to close the gap between the first peripheral side plate 14 and the annular sub-plate 522. The sealing ring 8 will not cause sealing failure due to deformation of the upper and lower contact surfaces through radial extrusion.

[0043] like Figure 1 and Figure 2 As shown, when the main housing 1 and the upper cover 5 are connected, the sealing ring 8 also closes the gap between the first annular end face 141 and the second annular end face 5211. In this way, the sealing roll also has a sealing effect in the direction perpendicular to the first annular end face 141 and the second annular end face 5211, and the sealing effect of double insurance is better.

[0044] The sealing ring 8 is arranged at the angle between the second annular end surface 5211 and the outer side surface of the annular sub-plate 522. The angle between the second annular end surface 5211 and the outer side surface of the annular sub-plate 522 can achieve sealing effects in both radial and axial directions.

[0045] In one possible embodiment, Figure 2 As shown, an annular groove 523 is provided on the second peripheral side plate 52, and the annular groove 523 is at least located on the annular sub-plate 522, and the sealing ring 8 is limited in the annular groove 523. It is convenient to limit the sealing ring 8 to be partially fixed in the annular groove 523, so that the sealing ring 8 is fixed and will not be easily displaced.

[0046] The annular groove 523 is partially located on the outer side of the annular sub-plate 522, and partially located on the second annular end surface 5211. The sealing ring 8 is partially embedded in the annular groove 523, and partially extends out of the annular groove 523. In this way, the sealing ring 8 can be distributed in both radial and axial directions to achieve a bidirectional sealing effect.

[0047] like Figure 2As shown, the first annular end face 141 and the inner side face of the first peripheral side plate 14 are smoothly transitioned through an arc surface. The arc surface is smooth and has no sharp corners, so it will not scratch the sealing ring 8, and is convenient for limiting the fit with the sealing ring 8. If it is a right-angle transition, the direct corner is sharp and can easily crush the sealing ring 8, thus affecting the service life of the sealing ring 8.

[0048] like Figure 4 and Figure 5 As shown, a limiting portion 5211a is provided on a side of the second annular end surface 5211 away from the annular sub-plate 522, and the limiting portion 5211a is limited to a side of the sealing ring 8 away from the annular sub-plate 522. The limiting portion 5211a prevents the sealing ring 8 from being squeezed too much when the deformation of the sealing ring 8 is serious, and part of the sealing ring 8 moves too much, or even moves out of the gap, which affects the sealing effect, and ensures a suitable compression amount of the sealing ring 8.

[0049] In a possible implementation, the limiting portion 5211a is provided on a partial end face section of the second annular end face 5211. The limiting portion 5211a is extended along the length direction of the second annular end face 5211. The length direction setting ensures that the limiting length of the limiting portion 5211a is longer, thereby ensuring that the sealing ring 8 will not shift.

[0050] like Figure 5 As shown, the limiting portion 5211a is provided with a smooth arc surface on one side facing the sealing ring 8. The arc surface will not scratch the sealing ring 8. If it is a right-angle transition, the sharp corners will easily crush the sealing ring 8, thus affecting the service life of the sealing ring 8.

[0051] The sealing structure of the battery pack with good waterproof performance of the present application can be suitable for the waterproof sealing of small battery packs. The main shell 1 and the upper cover 5 can be made of plastic material, which has low cost. The sealing ring 8 can be integrally formed with the upper cover 5 or the main shell 1, or can be installed separately later.

[0052] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A battery pack with good waterproof performance, characterized in that: include: A main shell, the main shell comprising a bottom plate and a first peripheral side plate arranged around the edge of the bottom plate, the first peripheral side plate being perpendicular to the bottom plate; An upper cover, the upper cover comprising a top plate and a second peripheral side plate arranged around the edge of the top plate, the second peripheral side plate being perpendicular to the top plate; A sealing ring, when the upper cover and the main shell are connected, the first circumferential side plate and the second circumferential side plate are arranged in sequence along the thickness direction of the first circumferential side plate, and the sealing ring is arranged between the first circumferential side plate and the second circumferential side plate, and closes the gap between the first circumferential side plate and the second circumferential side plate.

2. The battery pack with good waterproof performance according to claim 1, characterized in that: A first annular end surface is provided at one end of the first peripheral side plate away from the bottom plate; The second peripheral side plate comprises an annular main plate and an annular sub-plate, the annular main plate is connected to the top plate, and a second annular end surface is arranged at one end of the annular main plate away from the top plate; The annular sub-plate has a thickness smaller than that of the annular main plate, and the annular sub-plate is connected to the inner side surface of the second annular end surface; When the main shell and the upper cover are connected, the first annular end face is attached to the second annular end face, the first circumferential side plate and the annular sub-plate are arranged in sequence along the thickness direction of the first circumferential side plate, and the sealing ring is arranged between the first circumferential side plate and the annular sub-plate to close the gap between the first circumferential side plate and the annular sub-plate.

3. The battery pack with good waterproof performance according to claim 2, characterized in that: When the main shell and the upper cover are connected, the sealing ring also closes the gap between the first annular end surface and the second annular end surface.

4. The battery pack with good waterproof performance according to claim 3, characterized in that: The sealing ring is arranged at the angle between the second annular end surface and the outer side surface of the annular sub-plate.

5. The battery pack with good waterproof performance according to claim 4, characterized in that: The second peripheral side plate is provided with an annular groove; The annular groove is at least located on the annular sub-plate; The sealing ring is confined in the annular groove.

6. The battery pack with good waterproof performance according to claim 5, characterized in that: The annular groove is partially located on the outer side surface of the annular sub-plate, and partially located on the second annular end surface; The sealing ring is partially embedded in the annular groove and partially extends out of the annular groove.

7. The battery pack with good waterproof performance according to claim 6, characterized in that: The first annular end surface and the inner side surface of the first peripheral side plate are smoothly transitioned through an arc surface.

8. The battery pack with good waterproof performance according to claim 7, characterized in that: A limiting portion is provided on a side of the second annular end surface away from the annular sub-plate; The limiting portion is limited to a side of the sealing ring away from the annular sub-plate.

9. The battery pack with good waterproof performance according to claim 8, characterized in that: The limiting portion is provided on a partial end surface segment of the second annular end surface; The limiting portion is extended along the length direction of the second annular end surface.

10. The battery pack with good waterproof performance according to claim 9, characterized in that: A smooth arc surface is arranged on one side of the limiting portion facing the sealing ring.

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