Shell assembly and battery

Abstract

The utility model discloses a shell assembly and a battery, the shell assembly comprises a first shell and a second shell, one end of the first shell is provided with an opening, a first sealing surface and an accommodating groove, and the first sealing surface is located between the opening and the accommodating groove; the second shell is provided with a second sealing face and a first protrusion, the second sealing face is connected with the first sealing face, the first protrusion is located on one side of the second sealing face, and the first protrusion is inserted into the containing groove and is in clearance fit with the containing groove. According to the utility model, the second sealing surface is connected with the first sealing surface in a welding manner to form a first waterproof structure. After welding, the second shell and the first shell are fixed, the containing groove is located outside the first waterproof structure, the first protrusion can play a role in preventing most of water from entering the shell assembly, even if water penetrates through a gap between the first protrusion and the containing groove, the water can fall into the containing groove, a second waterproof structure is formed, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a shell assembly and a battery. Background Art

[0002] Electronic devices such as walkie-talkies and body cameras are extremely common during outdoor activities, and they typically require batteries to provide continuous power. However, in rainy weather, these devices may be exposed to water damage, or even the risk of accidentally dropping them into water. As the energy source of electronic devices, battery safety is directly related to the safe use of the entire device. If a battery short-circuits due to water intrusion, it will not only damage the battery itself but may also cause serious consequences such as fire and explosion, posing a threat to the user's personal safety. Therefore, ensuring that the battery is waterproof and airtight is a key consideration during design.

[0003] Currently, the industry generally uses a single-layer waterproofing solution for power batteries, using techniques such as gluing, potting, ultrasonic welding, or sealing rings to achieve waterproofing. However, in actual production, changes in product processing or different sealing materials can lead to differences in the plastic shell structure. In such cases, using a single waterproofing technology is difficult to guarantee the battery's waterproofing effectiveness. Once water enters the battery, it will affect its performance and seriously pose safety issues. Utility Model Content

[0004] The embodiments of the present invention provide a housing assembly and a battery to solve the problem that a single waterproof solution is difficult to ensure the waterproof effect of the battery.

[0005] Specifically, the utility model provides a shell assembly, including a first shell and a second shell, one end of the first shell is provided with an opening, a first sealing surface and a accommodating groove, the accommodating groove is arranged around the opening, and the first sealing surface is located between the opening and the accommodating groove; the second shell is connected to the first shell, and is used to cover the opening to enclose a closed accommodating cavity between the second shell and the first shell; a second sealing surface and a first protrusion are provided on the second shell, the second sealing surface is connected to the first sealing surface, the first protrusion is located on the side of the second sealing surface away from the accommodating cavity, the first protrusion is arranged around the second sealing surface, the first protrusion is inserted into the accommodating groove, and is gap-matched with the accommodating groove.

[0006] Optionally, a flange is provided on one end of the second shell facing the first shell, and the flange extends from the end of the second shell in a direction away from the accommodating cavity, and the second sealing surface is located on the side of the flange facing the first sealing surface; the first protrusion is provided on the flange.

[0007] Optionally, the distance between the flange and the side wall of the accommodating groove away from the accommodating cavity is 0.12 mm to 0.18 mm.

[0008] Optionally, a second protrusion is provided on the end surface of the flange, and the second protrusion extends in a direction away from the accommodating cavity; the distance between the second protrusion and the side wall of the accommodating groove away from the accommodating cavity is 0.12 mm to 0.18 mm.

[0009] Optionally, a welding strip surrounding the opening is provided on the second sealing surface, and the welding strip melts during ultrasonic welding to weld and fix the second sealing surface to the first sealing surface.

[0010] Optionally, the end of the first protrusion is spaced apart from the bottom of the accommodating groove.

[0011] Optionally, the thickness of the side wall of the first shell at the opening is 5.0 mm to 5.5 mm.

[0012] Optionally, the width of the welding strip decreases in a direction away from the second sealing surface, and the width of the welding strip does not exceed 0.6 mm.

[0013] Optionally, the accommodating groove is provided at the end of the first shell, and the end of the first shell is further provided with a stop protrusion; the end of the second shell is provided with a stop groove;

[0014] When the second sealing surface is connected to the first sealing surface, the stop protrusion is inserted into the stop groove, and the end of the stop protrusion abuts against the bottom of the stop groove.

[0015] The present invention also provides a battery, comprising a battery core and a shell assembly as described in any one of the above items, wherein the battery core is arranged in the accommodating cavity.

[0016] The beneficial effects of the present invention are:

[0017] In the cover plate, housing, and battery provided by the present invention, the second sealing surface is tightly connected to the first sealing surface, forming a closed first waterproof structure. After welding, the second housing and the first housing are fixed, and the receiving groove is located outside the first waterproof structure. The first protrusion can prevent most water from entering the housing assembly. Even if water passes through the gap between the first protrusion and the receiving groove, it will fall into the receiving groove, forming a second waterproof structure and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a schematic structural diagram of a battery in one embodiment of the present utility model;

[0020] Figure 2 is a schematic cross-sectional view of a housing assembly in one embodiment of the present utility model;

[0021] Figure 3 is a schematic partial cross-sectional view of a housing assembly in one embodiment of the present utility model;

[0022] Figure 4 It is a schematic partial cross-sectional view of a housing assembly in one embodiment of the present invention.

[0023] In the figure: 100, first housing, 110, stop protrusion, 120, first sealing surface, 130, receiving groove, 200, second housing, 210, second sealing surface, 220, first protrusion, 230, flange, 240, second protrusion, 250, stop groove, 260, welding strip, 300, receiving cavity;

[0024] L1, the width of the welding strip, L2, the distance between the second protrusion and the side wall of the accommodating groove, L3, the thickness of the side wall of the first shell at the opening. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Figure 1 This is a schematic structural diagram of a battery in one embodiment of the present invention. Figure 1 As shown, and reference Figures 2 to 4 , an embodiment of the present utility model provides a shell assembly, including a first shell 100 and a second shell 200, wherein one end of the first shell 100 is provided with an opening, a first sealing surface 120 and a receiving groove 130, the receiving groove 130 is arranged around the opening, and the first sealing surface 120 is located between the opening and the receiving groove 130; the second shell 200 is connected to the first shell 100, and is used to cover the opening to enclose a closed receiving cavity 300 between the second shell 200 and the first shell 100; the second shell 200 is provided with a second sealing surface 210 and a first protrusion 220, the second sealing surface 210 is connected to the first sealing surface 120, the first protrusion 220 is located on the side of the second sealing surface 210 away from the receiving cavity 130, the first protrusion 220 is arranged around the second sealing surface 210, the first protrusion 220 is inserted into the receiving groove 130, and has a clearance fit with the receiving groove 130.

[0029] During assembly, the first protrusion 220 of the first housing 100 is inserted into the receiving groove 130 of the second housing 200 to fix the first housing 100 and the second housing 200 relative to each other. Ultrasonic welding is then used to weld the first sealing surface 120 and the second sealing surface 210 together. The first protrusion 220 and the receiving groove 130 provide a clearance fit, allowing for quick installation and preventing installation interference.

[0030] In this embodiment, the second sealing surface 210 is welded to the first sealing surface 120 to form a closed first waterproof structure. After welding, the second housing 200 and the first housing 100 are fixed, and the receiving groove 130 is located outside the first waterproof structure. The first protrusion 220 can prevent most water from entering the housing assembly. Even if water passes through the gap between the first protrusion 220 and the receiving groove 130, it will fall into the receiving groove 130, forming a second waterproof structure and improving the sealing effect.

[0031] At the same time, the appearance of the battery must at least meet the requirement of a smooth surface. If the first shell 100 is thin, it is easy to deform; if the first shell 100 is thick, there will be a certain amount of shrinkage during the injection molding process, which may result in poor appearance. The provision of the accommodating groove 130 ensures that the first shell 100 has a certain thickness and reduces the glue, thereby ensuring the appearance yield of the first shell 100 after injection molding.

[0032] Specifically, the thickness L3 of the side wall of the first shell 100 at the opening is 5.0 mm to 5.5 mm.

[0033] like Figure 2 As shown, in one embodiment of the present invention, a flange 230 is provided on the end of the second housing 200 facing the first housing 100. The flange 230 extends from the end of the second housing 200 away from the accommodating cavity 300. The second sealing surface 210 is located on the side of the flange 230 facing the first sealing surface 120. The first protrusion 220 is provided on the flange 230. The provision of the flange 230 not only increases the mechanical strength of the second housing 200, but also facilitates the provision of the first protrusion 220, preventing the first protrusion 220 from excessively occupying the area of the second sealing surface 210, ensuring sufficient welding area for the first sealing surface 120 and improving the sealing effect.

[0034] In one embodiment of the present invention, the distance between the flange 230 and the side wall of the receiving groove 130 away from the receiving cavity 130 is 0.12mm to 0.18mm. Specifically, the distance between the flange 230 and the side wall of the receiving groove 130 is 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, or 0.18mm. If the distance between the flange 230 and the side wall of the receiving groove 130 is too large, it will not be able to block foreign matter. If the distance is too small, due to factors such as production tolerances, there may be installation interference during assembly, which will prevent quick assembly and affect the effect of ultrasonic welding.

[0035] like Figure 3 、 Figure 4As shown, in an alternative embodiment of the present invention, a first protrusion 220 is provided at the end of the flange 230 away from the accommodating cavity 300. A second protrusion 240 is provided on the end surface of the flange 230. The second protrusion 240 extends in a direction away from the accommodating cavity 300. The distance L2 between the second protrusion 240 and the side wall of the accommodating groove 130 away from the accommodating cavity 130 is 0.12mm to 0.18mm. Specifically, the distance between the second protrusion 240 and the side wall of the accommodating groove 130 is 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, or 0.18mm. In addition to the effects of the above embodiment, this arrangement can also ensure a certain distance between the first protrusion 220 and the side wall of the accommodating groove 130, facilitating quick installation and avoiding installation interference.

[0036] In one embodiment of the present invention, a welding strip 260 surrounding the opening is provided on the second sealing surface 210. The welding strip 260 melts during ultrasonic welding to weld the second sealing surface 210 to the first sealing surface 120. Ultrasonic welding melts the welding strip 260, thereby welding the second sealing surface 210 to the first sealing surface 120. The melted welding strip 260 fills the space between the second sealing surface 210 and the first sealing surface 120, achieving a sealing effect.

[0037] Furthermore, the width of the welding strip 260 decreases as it moves away from the second sealing surface 210, and the width L1 of the welding strip 260 does not exceed 0.6 mm. Because the welding line is annular and surrounds the opening, the sealing effect after welding is ensured. A good sealing effect can be achieved even with a width of no more than 0.6 mm. Furthermore, the triangular cross-section of the welding strip 260 provides a relatively stable welding process.

[0038] In one embodiment of the present invention, the accommodating groove 130 is provided at the end of the first housing 100, and a stop protrusion 110 is also provided at the end of the first housing 100. A stop groove 250 is provided at the end of the second housing 200. When the second sealing surface 210 is connected to the first sealing surface 120, the stop protrusion 110 is inserted into the stop groove 250, and the end of the stop protrusion 110 abuts the bottom of the stop groove 250.

[0039] In this embodiment of the present invention, during welding, the welding strip 260 melts, and the second sealing surface 210 and the first sealing surface 120 approach each other until the stop protrusion 110 and the stop groove 250 contact each other. This ensures that the distance between the second sealing surface 210 and the first sealing surface 120 is the same at all locations, ensuring uniform and stable welding. Furthermore, the melted welding strip 260 also flows between the stop protrusion 110 and the stop groove 250, providing a sealing effect.

[0040] In one embodiment of the present invention, the end of the first protrusion 220 is spaced apart from the bottom of the receiving groove 130 to ensure that there is enough space in the receiving groove 130 to accommodate water entering the receiving groove 130 and prevent water from entering the housing assembly.

[0041] The present invention also provides a battery comprising a battery cell and a housing assembly according to any one of the above embodiments, so as to have all the effects of the housing assembly.

[0042] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A housing assembly, characterized in that: It includes a first shell and a second shell, one end of the first shell is provided with an opening, a first sealing surface and a receiving groove, the receiving groove is arranged around the opening, and the first sealing surface is located between the opening and the receiving groove; the second shell is connected to the first shell, and is used to cover the opening to enclose a closed receiving cavity between the second shell and the first shell; the second shell is provided with a second sealing surface and a first protrusion, the second sealing surface is connected to the first sealing surface, the first protrusion is located on the side of the second sealing surface away from the receiving cavity, the first protrusion is arranged around the second sealing surface, the first protrusion is inserted into the receiving groove, and is gap-matched with the receiving groove.

2. The housing assembly according to claim 1, wherein: A flange is provided on one end of the second shell facing the first shell, and the flange extends from the end of the second shell in a direction away from the accommodating cavity. The second sealing surface is located on the side of the flange facing the first sealing surface; the first protrusion is provided on the flange.

3. The housing assembly according to claim 2, wherein: The distance between the flange and the side wall of the accommodating groove away from the accommodating cavity is 0.12 mm to 0.18 mm.

4. The housing assembly according to claim 2, wherein: A second protrusion is provided on the end surface of the flange, and the second protrusion extends in a direction away from the accommodating cavity; the distance between the second protrusion and the side wall of the accommodating groove away from the accommodating cavity is 0.12mm to 0.18mm.

5. The housing assembly according to claim 1, wherein: A welding strip surrounding the opening is provided on the second sealing surface. The welding strip melts during ultrasonic welding to weld and fix the second sealing surface to the first sealing surface.

6. The housing assembly according to claim 5, wherein: The width of the welding strip decreases in a direction away from the second sealing surface, and the width of the welding strip does not exceed 0.6 mm.

7. The housing assembly according to claim 1, wherein: The end of the first protrusion is spaced apart from the bottom of the accommodating groove.

8. The housing assembly according to claim 1, wherein: The thickness of the side wall of the first shell at the opening is 5.0 mm to 5.5 mm.

9. The housing assembly according to claim 1, wherein: The accommodating groove is provided at the end of the first shell, and the end of the first shell is also provided with a stop protrusion; the end of the second shell is provided with a stop groove; When the second sealing surface is connected to the first sealing surface, the stop protrusion is inserted into the stop groove, and the end of the stop protrusion abuts against the bottom of the stop groove.

10. A battery, characterized in that: It comprises a battery core and a shell assembly according to any one of claims 1 to 9, wherein the battery core is arranged in the accommodating cavity.

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