Battery case, battery, and terminal device

Abstract

The utility model discloses a battery case, battery and terminal equipment relates to battery technical field. The battery case includes first half shell and second half shell, and first half shell and second half shell all include recessed structure and edge portion, and the edge portion surrounds the edge of recessed structure and extends outward, and the edge portion of first half shell and the edge portion of second half shell are sealedly connected, and the opening size of recessed structure is greater than the bottom size of recessed structure. When the battery cell expands, the two sides of the battery cell abut with the bottom of the recessed structure of first half shell and second half shell respectively, so that the bottom of the recessed structure of first half shell and second half shell is away from each other, at this moment, the opening of recessed structure contracts to adapt the expansion of battery cell, thereby avoiding the expansion damage of battery shell.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a battery casing, a battery, and a terminal device. Background Technology

[0002] Batteries are generally used to provide electricity; typically, pouch cells or steel-cased cells are used to power electronic products. In existing batteries, the internal space of the battery casing houses the battery cells. During use, these cells can expand, causing damage to the battery casing. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery casing, a battery, and a terminal device to address the problem that existing battery casings are damaged due to cell expansion.

[0004] To address the aforementioned issues, this utility model provides a battery casing comprising a first half-shell and a second half-shell. Both the first half-shell and the second half-shell include a recessed structure and an edge portion. The edge portion surrounds the edge of the recessed structure and extends outward. The edge portion of the first half-shell and the edge portion of the second half-shell are sealed together. The opening size of the recessed structure is larger than the bottom size of the recessed structure.

[0005] As a further improvement to the above technical solution: Preferably, the angle between the sidewall of the recessed structure and the bottom of the recessed structure is 95 degrees to 105 degrees.

[0006] Preferably, the edge portions of the first half-shell and the edge portions of the second half-shell are welded to form a connecting edge.

[0007] Preferably, the width of the connecting edge is L, where 0.5mm < L < 1.5mm.

[0008] Preferably, the outer edges of the edge portion of the first half-shell and the outer edges of the edge portion of the second half-shell are laser-welded together.

[0009] Preferably, the first half-shell and the second half-shell are made of stainless steel.

[0010] Preferably, the thickness of both the first half-shell and the second half-shell is D, where 0.1mm < D < 0.15mm.

[0011] Preferably, the first half-shell and the second half-shell are made of copper alloy or aluminum alloy.

[0012] On the other hand, this utility model embodiment provides a battery, including a battery cell and a battery casing as described above, wherein the battery cell is disposed inside the recessed structure.

[0013] In another aspect, this utility model embodiment provides a terminal device, wherein the battery compartment of the terminal device is provided with at least one battery as described above.

[0014] The battery casing, battery, and terminal device provided in this embodiment of the present invention have at least the following advantages compared with the prior art: The battery casing, due to the sealed connection between the edges of the first half-shell and the second half-shell, forms a receiving space for the battery cell by creating a recessed structure in the first and second half-shells. The battery cell is placed in this receiving space, and because the opening size of the recessed structure is larger than the bottom size, when the battery cell expands, both sides of the battery cell abut against the bottom of the recessed structure in the first and second half-shells, causing the bottoms of the recessed structures to move away from each other. At this time, the opening of the recessed structure contracts to accommodate the expansion of the battery cell, thereby preventing damage to the battery casing due to expansion. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the battery casing provided in one embodiment of the present invention.

[0017] The reference numerals in the accompanying drawings are as follows: 100. Battery casing; 110. First half-shell; 111. Edge; 112. Side wall; 113. Bottom; 120. Second half-shell. Detailed Implementation

[0018] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a battery housing 100, which includes a first half-shell 110 and a second half-shell 120. Both the first half-shell 110 and the second half-shell 120 include a recessed structure and an edge portion 111. The edge portion 111 surrounds the edge of the recessed structure and extends outward. The edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120 are sealed together. The opening size of the recessed structure is larger than the bottom size 113 of the recessed structure.

[0022] In one embodiment of this utility model, the battery casing 100 has a sealed connection between the edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120, so that the recessed structure of the first half-shell 110 and the second half-shell 120 forms a receiving space for accommodating the battery cell. The battery cell is placed in the receiving space formed by the recessed structure of the first half-shell 110 and the second half-shell 120. Since the opening size of the recessed structure is larger than the bottom size 113 of the recessed structure, when the battery cell expands, both sides of the battery cell abut against the bottom 113 of the recessed structure of the first half-shell 110 and the second half-shell 120, respectively, so that the bottom 113 of the recessed structure of the first half-shell 110 and the second half-shell 120 move away from each other. At this time, the opening of the recessed structure contracts to accommodate the expansion of the battery cell, thereby avoiding damage to the battery casing due to expansion.

[0023] In this embodiment, as Figure 1As shown, the angle between the sidewall 112 and the bottom 113 of the recessed structure is 95 to 105 degrees. The sidewall 112 of the recessed structure gradually slopes outwards in a direction away from the bottom 113 of the recessed structure. When the battery cell expands, both sides of the battery cell abut against the bottom 113 of the recessed structure of the first half-shell 110 and the second half-shell 120, respectively, causing the bottom 113 of the recessed structure of the first half-shell 110 and the second half-shell 120 to move away from each other. At this time, the angle between the sidewall 112 and the bottom 113 of the recessed structure gradually decreases to accommodate the expansion of the battery cell, thereby preventing the battery casing from expanding and being damaged.

[0024] It is understandable that when the angle between the sidewall 112 of the recessed structure and the bottom 113 of the recessed structure is 90 degrees, the distance between the bottom 113 of the recessed structure of the first half-shell 110 and the bottom 113 of the recessed structure of the second half-shell 120 is the largest.

[0025] The battery casing 100 provided in one embodiment of this utility model has a first half-shell 110 and a second half-shell 120, both made of metal materials, such as stainless steel, copper alloy, or aluminum alloy. The edges 111 of the first half-shell 110 and the second half-shell 120 are welded together to form a connecting edge. The first half-shell 110 and the second half-shell 120 are stamped to form a recessed structure, which strengthens the casing and prevents deformation. The width of the connecting edge is L, 0.5mm < L < 1.5mm. The thickness of both the first and second half-shells is D, 0.1mm < D < 0.15mm.

[0026] After the edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120 are attached, they are cut to shorten the width of the edge portion 111 and reduce the volume of the battery casing 100. Then, the outer edges of the edge portion 111 of the first half-shell 110 and the outer edges of the edge portion 111 of the second half-shell 120 are welded by laser swing welding to make the edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120 sealed together.

[0027] Of course, it is understood that the first half-shell 110 and the second half-shell 120 can also be formed in other ways, such as by forging, to form a recessed structure on the first half-shell 110 and the second half-shell 120; the outer edges of the edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120 can also be welded in other ways, such as by through welding, to seal the edge portion 111 of the first half-shell 110 and the edge portion 111 of the second half-shell 120 together, which is not limited here.

[0028] In addition, such as Figure 1As shown, another embodiment of the present invention provides a battery device, which includes a battery cell and a battery casing 100 as provided in any of the above embodiments, wherein the battery cell is disposed inside a recessed structure. The specific structure of the battery casing 100 is the same as described in the above embodiments. Since the present battery device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0029] In addition, such as Figure 1 As shown, another embodiment of this utility model provides a terminal device, the battery compartment of which is provided with at least one battery as provided in any of the above embodiments. The specific structure of the battery is the same as in the above embodiments. Since this terminal device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0030] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A battery casing, characterized in that, The device includes a first half-shell and a second half-shell, both of which include a recessed structure and an edge portion. The edge portion surrounds the edge of the recessed structure and extends outward. The edge portion of the first half-shell and the edge portion of the second half-shell are sealed together. The opening size of the recessed structure is larger than the bottom size of the recessed structure.

2. The battery casing according to claim 1, characterized in that, The angle between the sidewall of the recessed structure and the bottom of the recessed structure is 95 degrees to 105 degrees.

3. The battery casing according to claim 1, characterized in that, The edge portions of the first half-shell and the edge portions of the second half-shell are welded together to form a connecting edge.

4. The battery casing according to claim 3, characterized in that, The width of the connecting edge is L, where 0.5mm < L < 1.5mm.

5. The battery casing according to claim 3, characterized in that, The outer edges of the first half-shell and the outer edges of the second half-shell are laser-welded together.

6. The battery casing according to any one of claims 1 to 5, characterized in that, The first half-shell and the second half-shell are made of stainless steel.

7. The battery casing according to claim 6, characterized in that, The thickness of both the first half-shell and the second half-shell is D, where 0.1 mm < D < 0.15 mm.

8. The battery casing according to any one of claims 1 to 5, characterized in that, The first half-shell and the second half-shell are made of copper alloy or aluminum alloy.

9. A battery, characterized in that, It includes a battery cell and a battery casing as described in any one of claims 1 to 8, wherein the battery cell is disposed inside the recessed structure.

10. A terminal device, characterized in that, The terminal device has at least one battery as described in claim 9 in its battery compartment.

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