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, the end part of the first shell is provided with a first sealing groove and a first bulge which surround an accommodating cavity, and the first bulge is positioned on one side, far away from the accommodating cavity, of the first sealing groove; a second bulge is arranged at the end part of the second shell; when the second shell is connected with the first shell, the second protrusion is inserted into the first sealing groove, a second sealing groove is defined by the side wall of the second shell, the end of the first shell and the side face, facing the containing cavity, of the first protrusion, and the second sealing groove is used for containing sealant. The second sealing groove is defined by the side wall of the second shell, the end of the first shell and the side face, facing the containing cavity, of the first protrusion, the second sealing groove can be filled with sealant for defective products which are not tightly welded and leak water, the sealing effect is further achieved, and therefore the yield of the products is increased.

Description

Technical Field

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

[0002] Electronic devices such as walkie-talkies and law enforcement cameras are widely used in outdoor activities. These electronic devices usually need to be equipped with power batteries to provide continuous power support. In order to ensure the safety of power batteries, ensuring that the power batteries have good waterproof and airtightness is an important aspect that must be considered during design.

[0003] At present, power batteries in the industry are usually sealed by ultrasonic welding or adhesive sealing. In the ultrasonic welding process, the melted ultrasonic line flows to both sides. If there are problems such as process deviation, a gap will be left between the two shells, which cannot be completely sealed, making it difficult to meet high-level waterproof requirements and affecting the product yield. Utility Model Content

[0004] The embodiments of the utility model provide a shell assembly and a battery to solve the problem that the product yield is affected by loose shell welding.

[0005] Specifically, the utility model provides a shell assembly, comprising a first shell and a second shell, wherein the second shell and / or the first shell is provided with a receiving cavity with an opening at one end, and the second shell is connected to the first shell to cover the opening; the end of the first shell is provided with a first sealing groove and a first protrusion surrounding the receiving cavity, and the first protrusion is located on a side of the first sealing groove away from the receiving cavity; the end of the second shell is provided with a second protrusion;

[0006] When the second shell is connected to the first shell, the second protrusion is inserted into the first sealing groove, and the side wall of the second shell, the end of the first shell, and the side of the first protrusion facing the accommodating cavity form a second sealing groove, and the second sealing groove is used to accommodate sealant.

[0007] Optionally, a welding strip surrounding the accommodating cavity is provided in the first sealing groove, and the welding strip melts during ultrasonic welding so that the second protrusion is welded and fixed to the first sealing groove.

[0008] Optionally, the number of the welding bars is two, and the two welding bars are symmetrically arranged on opposite side walls of the first sealing groove.

[0009] Optionally, the first sealing groove includes a first groove portion and a second groove portion that are connected, and the second groove portion is opened at the bottom of the first groove portion; the width of the first groove portion is greater than the width of the second groove portion, so that the first shell forms two welding strips at the connection position between the first groove portion and the second groove portion.

[0010] Optionally, the width of the second protrusion is greater than the width of the second groove portion, and the width of the second protrusion is less than the width of the first groove portion.

[0011] Optionally, an arc surface is provided at one end of the second protrusion away from the second shell, and when the second protrusion is inserted into the sealing groove, the arc surface abuts against the welding strip.

[0012] Optionally, a flange is provided at one end of the second shell facing the first shell, the flange extends from the end of the second shell in a direction away from the accommodating cavity, and a side surface of the flange is a groove wall of the second sealing groove.

[0013] Optionally, the thickness of the flange is the same as the height of the first protrusion.

[0014] Optionally, the width of the second sealing groove is 0.05 mm to 0.10 mm.

[0015] The utility model 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 utility model are:

[0017] In the shell assembly and battery provided by the utility model, a second protrusion is provided on the end of the second shell and inserted into the first sealing groove of the first shell, so that the positions of the first shell and the second shell are relatively fixed, and then the second protrusion is welded to the first sealing groove by ultrasonic welding to achieve a sealing effect. In addition, since the side wall of the second shell and the end of the first shell and the side of the first protrusion facing the accommodating cavity are surrounded to form a second sealing groove, for defective products with loose welding and water leakage, sealant can be filled in the second sealing groove to play a further sealing role, thereby improving the yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic partial cross-sectional view of a housing assembly in one embodiment of the utility model;

[0020] Figure 2 is a schematic partial cross-sectional view of a first housing in an embodiment of the utility model;

[0021] Figure 3 It is a schematic partial cross-sectional view of the second shell in one embodiment of the utility model.

[0022] In the figure: 100, a first shell, 110, a sealing groove, 111, a first groove portion, 112, a second groove portion, 120, a first protrusion, 130, a welding strip, 200, a second shell, 210, a second protrusion, 211, an arc surface, 220, a flange, 300, a second sealing groove. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Figure 1 is a schematic partial cross-sectional view of a housing assembly in one embodiment of the present utility model, such as Figure 1 As shown, and refer to Figures 2 to 3The embodiment of the utility model provides a shell assembly, including a first shell 100 and a second shell 200, wherein the second shell 200 and / or the first shell 100 is provided with a receiving cavity with an opening at one end, and the second shell 200 is connected to the first shell 100 to cover the opening; the end of the first shell 100 is provided with a first sealing groove 110 and a first protrusion 120 surrounding the receiving cavity, and the first protrusion 120 is located on the side of the first sealing groove 110 away from the receiving cavity; the end of the second shell 200 is provided with a second protrusion 210; when the second shell 200 is connected to the first shell 100, the second protrusion 210 is inserted into the sealing groove, and the side wall of the second shell 200, the end of the first shell 100, and the first protrusion 120 are surrounded by the side of the receiving cavity to form a second sealing groove 300, and the second sealing groove 300 is used to contain sealant.

[0027] In the embodiment of the utility model, a second protrusion 210 is provided on the end of the second shell 200 and inserted into the first sealing groove 110 of the first shell 100, so that the positions of the first shell 100 and the second shell 200 are relatively fixed, and then the second protrusion 210 and the first sealing groove 110 are welded together by ultrasonic welding to achieve a sealing effect. In addition, since the side wall of the second shell 200, the end of the first shell 100, and the side of the first protrusion 120 limit the second sealing groove 300, for defective products with loose welding and water leakage, sealant can be filled in the second sealing groove 300 to play a further sealing role, thereby improving the yield of the product.

[0028] Specifically, a welding strip 130 surrounding the accommodating cavity is disposed in the first sealing groove 110, and the welding strip 130 melts during ultrasonic welding, so that the second protrusion 210 is welded and fixed to the first sealing groove 110. The welding strip 130 is melted by ultrasonic welding, and the melted welding strip 130 is filled between the second protrusion 210 and the first sealing groove 110, so that the second shell 200 and the first shell 100 are integrated to achieve a sealing effect.

[0029] Furthermore, the number of the welding strips 130 is two, and the two welding strips 130 are symmetrically arranged on the opposite side walls of the first sealing groove 110. By arranging two welding strips 130, two welds are formed between the second shell 200 and the first shell 100, and the two welded parts assist each other, which can further improve the sealing effect and reduce the defective rate of the product.

[0030] like Figure 2As shown, in one embodiment of the utility model, the first sealing groove 110 includes a first groove portion 111 and a second groove portion 112 that are connected, and the second groove portion 112 is opened at the bottom of the first groove portion 111; the width of the first groove portion 111 is greater than the width of the second groove portion 112, so that the first housing 100 forms two welding strips 130 at the connection between the first groove portion 111 and the second groove portion 112. In this way, the longitudinal section of the first sealing groove 110 is stepped, and the edges of the steps are the welding strips 130 to achieve a welding effect.

[0031] Furthermore, the width of the second protrusion 210 is greater than the width of the second groove 112, and the width of the second protrusion 210 is less than the width of the first groove 111. The end of the second protrusion 210 away from the second shell 200 is provided with an arc surface 211, and when the second protrusion 210 is inserted into the sealing groove, the arc surface 211 abuts against the welding strip 130. When in use, the arc surface 211 of the second protrusion 210 abuts against the welding strip 130; during ultrasonic welding, the melted welding strip 130 flows along the arc surface 211 to both sides of the welding strip 130, fills the gap between the second protrusion 210 and the first sealing groove 110, and fuses the second shell 200 and the first shell 100 into one after solidification.

[0032] like Figure 3 As shown, in one embodiment of the present invention, a flange 220 is provided at one end of the second housing 200 facing the first housing 100, and the flange 220 extends from the end of the second housing 200 in a direction away from the accommodating cavity, and the side of the flange 220 is the groove wall of the second sealing groove 300. The thickness of the flange 220 is the same as the height of the first protrusion 120, so as to facilitate filling the formed second sealing groove 300 with sealant.

[0033] In one embodiment of the present invention, the width of the second sealing groove 300 is 0.05 mm to 0.10 mm. Specifically, the width of the second sealing groove 300 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm or 0.10 mm. If the width of the second sealing groove 300 is too large, a large amount of sealant needs to be filled, and the economic cost is high; if the width of the second sealing groove 300 is too small, it is difficult to pour the sealant into the second sealing groove 300, and the production efficiency is low.

[0034] The utility model also provides a battery, comprising a battery core and a shell assembly as in any one of the above embodiments, so as to have all the effects of the shell assembly. The battery core is arranged in the accommodating cavity.

[0035] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A housing assembly, characterized in that: The invention comprises a first shell (100) and a second shell (200), wherein the second shell (200) and / or the first shell (100) are provided with a receiving cavity with an opening at one end, and the second shell (200) is connected to the first shell (100) to cover the opening; the end of the first shell (100) is provided with a first sealing groove (110) and a first protrusion (120) surrounding the receiving cavity, and the first protrusion (120) is located on a side of the first sealing groove (110) away from the receiving cavity; and the end of the second shell (200) is provided with a second protrusion (210); When the second shell (200) is connected to the first shell (100), the second protrusion (210) is inserted into the first sealing groove (110), and the side wall of the second shell (200), the end of the first shell (100), and the side of the first protrusion (120) facing the accommodating cavity are surrounded to form a second sealing groove (300), and the second sealing groove (300) is used to accommodate sealant.

2. The housing assembly according to claim 1, characterized in that: A welding strip (130) surrounding the accommodating cavity is arranged in the first sealing groove (110); the welding strip (130) melts during ultrasonic welding so that the second protrusion (210) is welded and fixed to the first sealing groove (110).

3. The housing assembly according to claim 2, characterized in that: The number of the welding bars (130) is two, and the two welding bars (130) are symmetrically arranged on opposite side walls of the first sealing groove (110).

4. The housing assembly according to claim 3, characterized in that: The first sealing groove (110) comprises a first groove portion (111) and a second groove portion (112) which are connected to each other, and the second groove portion (112) is opened at the bottom of the first groove portion (111); the width of the first groove portion (111) is greater than the width of the second groove portion (112), so that the first shell (100) forms two welding strips (130) at the connection position between the first groove portion (111) and the second groove portion (112).

5. The housing assembly according to claim 4, characterized in that: The width of the second protrusion (210) is greater than the width of the second groove (112), and the width of the second protrusion (210) is less than the width of the first groove (111).

6. The housing assembly according to claim 4, characterized in that: An arc surface (211) is provided at one end of the second protrusion (210) away from the second shell (200); when the second protrusion (210) is inserted into the sealing groove, the arc surface (211) abuts against the welding strip (130).

7. The housing assembly according to claim 1, characterized in that: An end of the second shell (200) facing the first shell (100) is provided with a flange (220), the flange (220) extending from the end of the second shell (200) in a direction away from the accommodating cavity, and the side surface of the flange (220) is the groove wall of the second sealing groove (300).

8. The housing assembly according to claim 7, characterized in that: The thickness of the flange (220) is the same as the height of the first protrusion (120).

9. The housing assembly according to claim 1, characterized in that: The width of the second sealing groove (300) is 0.05 mm to 0.10 mm.

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

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