Metal shell capable of being assembled in embedded mode

Abstract

The utility model discloses an embeddable assembled metal shell, which comprises a shell and an end cover, one side of the shell is open, a support plate is fixed on the end cover, one side of the end cover far away from the shell is provided with a connecting point, the support plate is provided with a through hole corresponding to the connecting point, and the through hole is provided with a through hole corresponding to the connecting point. A step is arranged at the position, close to the supporting plate, of the opening. According to the utility model, the condition limitation on the structure of the end cover is reduced, the end cover and the embedded shell are better matched, the matching of the supporting plate and the step enables the diaphragm not to influence the welding surface, the product welding yield is improved, the end cover and the embedded shell can be assembled more tightly, and the laser welding effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery assemblies, in particular to an embedded assembly metal shell. Background Art

[0002] Currently, cylindrical lithium-ion battery shells on the market are generally tube shells with openings at both ends or shells with openings at one end, and the open end needs to be matched with an end cover or another shell, and connected and sealed by welding or riveting.

[0003] The tube shell is generally a seamless or seamed tube, and the material is a commonly used iron-based alloy, such as stainless steel, carbon steel, etc. The plate is formed by bending, welding and stretching; the shell material is generally a commonly used iron-based alloy or aluminum alloy, such as stainless steel, carbon steel, etc. The plate is formed by bending, stretching, cutting and other stamping, and surface treatments such as electroplating and passivation are performed when necessary.

[0004] End caps are currently widely used in the electronics industry, especially in the lithium-ion battery industry. However, the current structure is generally a combination of upper and lower shell end caps that rely on the steps of the end caps for fixed cooperation. Non-embedded metal shells have defects and shortcomings in the use of lithium-ion batteries.

[0005] 1. The matching of the end cover and the existing shell requires a step, or relies on tooling for fixation. There are great limitations, and it is difficult to ensure the stability of its welding.

[0006] 2. After the end cover and the shell are closed, there is no support at the bottom, and there is a risk of crushing the core during welding and pressing, which will result in NG performance of the finished battery.

[0007] 3. In the process of battery production, the core-to-shell process cannot achieve perfect matching because the shell size and the core size are not fixed, which will cause the core to be squeezed so that the diaphragm height exceeds the core height. When the end cover and the shell are matched, the diaphragm is pressed and the welding surface is affected, resulting in cold welding, which will cause the product to be scrapped.

[0008] 4. The outer diameter dimensions of the current end cover and the shell are not integrally formed, and there is a risk that the cover may be offset and cause a cold weld when the fixing tool is clamped. Utility Model Content

[0009] The technical problem to be solved by the utility model is to provide an embeddable assembled metal shell, reduce the conditional restrictions on the end cover structure, make the end cover and the embedded shell better match, and the cooperation between the support plate and the step makes the diaphragm not affect the welding surface, thereby improving the product welding yield. At the same time, the end cover and the embeddable shell will be assembled more tightly, and the laser welding effect will be better.

[0010] In order to solve the above technical problems, the utility model provides an embedded assembled metal shell, including a shell and an end cover, wherein one side of the shell is open, a support plate is fixed on the end cover, a connection point is arranged on the side of the end cover away from the shell, a through hole is arranged on the support plate at a position corresponding to the connection point, and a step is arranged at the opening near the support plate.

[0011] Furthermore, the shell includes a bottom plate and a side plate surrounding the bottom plate, and an arc-shaped connecting structure is provided between the side plate and the bottom plate.

[0012] Furthermore, an insulating pad is provided between the end cover and the support plate.

[0013] Furthermore, the side plate is a thin-walled tube shell, which is integrally formed by mechanical processing of iron-based expansion alloy, stainless steel or aluminum alloy material.

[0014] Furthermore, the size of the end cover is smaller than the size of the support plate.

[0015] Furthermore, the size of the insulating pad is the same as the size of the end cover.

[0016] The beneficial effects of the utility model are as follows: 1) reducing the conditional restrictions on the end cover structure, so that the end cover and the embedded shell are better matched.

[0017] 2) When the end cover is matched with the embedded shell, the presence of the step prevents the diaphragm from affecting the welding surface, thereby improving the product welding yield.

[0018] 3) Due to the presence of the step, the end cover and the embeddable housing will be assembled more tightly, and the laser welding effect will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the shell structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of the end cover and the support plate of the utility model.

[0022] Explanation of the numbers in the figure: 1. Shell; 11. Bottom plate; 12. Side plate; 13. Step; 14. Arc-shaped connection structure; 2. End cover; 3. Support plate; 4. Connection point; 5. Through hole; 6. Insulation pad. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] Reference Figures 1 to 3 As shown, an embodiment of an embeddable assembled metal shell 1 of the utility model includes a shell 1 and an end cover 2, wherein one side of the shell 1 is open, a support plate 3 is fixed to the end cover 2, a connection point 4 is arranged on the side of the end cover 2 away from the shell 1, a through hole 5 is arranged on the support plate 3 at a position corresponding to the connection point 4, and a step 13 is arranged at the opening near the support plate 3.

[0030] When in use, first, the support plate 3 and the end cover 2 are separately arranged. The end cover 2 is used to adapt to the internal battery assembly. At this time, the support plate 3 is used to adapt to the step 13 for welding and fixing, that is, the size of the end cover 2 can be adjusted to make it adapt to the battery. In this way, when the end cover 2 is matched with the embedded shell 1, the existence of the step 13 makes the diaphragm cannot affect the welding surface, thereby improving the product welding yield. After placement, welding can be completed from top to bottom.

[0031] An insulating pad 6 is arranged between the end cover 2 and the support plate 3 to achieve an insulating effect; the shell 1 includes a bottom plate 11 and a side plate 12 surrounding the circumference of the bottom plate 11, and an arc-shaped connecting structure 14 is arranged between the side plate 12 and the bottom plate 11, and the integrated structure is relatively stable; the side plate 12 is a thin-walled tube shell, which is integrally formed by mechanical processing of an iron-based expansion alloy, stainless steel or aluminum alloy material, and also has a high structural strength; the size of the end cover 2 is smaller than that of the support plate 3, and the size of the insulating pad 6 is the same as that of the end cover 2, because the end cover 2 is to be embedded in the shell 1, and the support plate 3 is to be adapted to the step 13 on the circumferential side, so the size of the end cover 2 is slightly smaller.

[0032] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. An embeddable metal housing, characterized in that: The invention comprises a shell (1) and an end cover (2), wherein one side of the shell (1) is open, a support plate (3) is fixed on the end cover (2), a connection point (4) is arranged on the side of the end cover (2) away from the shell (1), a through hole (5) is arranged on the support plate (3) at a position corresponding to the connection point (4), and a step (13) is arranged at a position of the opening close to the support plate (3).

2. The embeddable metal housing according to claim 1, characterized in that: The housing (1) comprises a bottom plate (11) and a side plate (12) surrounding the circumference of the bottom plate (11), and an arc-shaped connecting structure (14) is provided between the side plate (12) and the bottom plate (11).

3. The embeddable metal housing according to claim 1, characterized in that: An insulating pad (6) is provided between the end cover (2) and the support plate (3).

4. The embeddable metal housing according to claim 2, characterized in that: The side plate (12) is a thin-walled tube shell, which is integrally formed from an iron-based expansion alloy, stainless steel or aluminum alloy material through mechanical processing.

5. The embeddable metal housing according to claim 1, characterized in that: The size of the end cover (2) is smaller than the size of the support plate (3).

6. The embeddable metal housing according to claim 3, characterized in that: The size of the insulating pad (6) is the same as the size of the end cover (2).

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