Battery shell and battery thereof

Abstract

The utility model provides a battery shell and a battery thereof, the battery shell comprises a battery shell, the battery shell is enclosed by a shell I and a shell II to form an accommodating space, and the accommodating space is used for accommodating a naked battery cell; the upper end of the battery shell is provided with a sunken surface which is sunken inwards, and the sunken surface is provided with an avoiding groove for mounting a top cover assembly; according to the utility model, the battery shell is used for replacing part of the top cover, and the utilization rate of the battery space is improved by utilizing the difference between the thickness of the shell and the thickness of the cover plate and reducing the waste of the cover plate in the vertical space by shortening the length of the top cover.

Description

Technical Field

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

[0002] Power lithium-ion batteries are power sources, mostly referring to batteries that provide power for electric cars, electric trains, electric bicycles, golf carts, etc. Power batteries are generally packaged in aluminum shells and have the characteristics of small size, light weight, high power, no memory, and green environmental protection. They have been widely used.

[0003] In the current square batteries, efforts have been made to improve the space utilization of the battery cells. However, the existing shells are mostly one-piece shells, which are assembled by welding the open end of the shell and the cover plate. Since the thickness of the cover plate is generally between 1.5-3mm and the shell wall thickness is between 0.15-0.6mm, the cover plate wastes a lot of space in the vertical space.

[0004] To this end, we propose a battery housing and a battery thereof to solve the problem of low space utilization. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A battery shell, characterized in that it includes a battery shell, wherein the battery shell is enclosed by a shell one and a shell two to form an accommodating space, and the accommodating space is used to accommodate bare batteries; a recessed surface recessed inwardly is provided at the upper end of the battery shell, and an avoidance groove for installing a top cover assembly is provided on the recessed surface; the utility model replaces part of the top cover with a battery shell, utilizes the difference in thickness between the shell and the cover plate, shortens the length of the top cover, and reduces the waste of the cover plate in the vertical space, thereby improving the utilization rate of the battery space.

[0007] Further preferably, the shell body 1 is a frame-type structure with a notch, and the notch is provided on a concave surface that is concave inwardly.

[0008] Further preferably, the shell one and the shell two are symmetrical structures.

[0009] Further preferably, the short side of the avoidance groove is provided with an outwardly protruding step.

[0010] Further preferably, the step is located at the bottom of the recessed surface.

[0011] Further preferably, the height of the top cover assembly in the avoidance groove is less than or equal to the depth of the recessed surface.

[0012] A battery comprises the battery casing described in any one of the above.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model replaces the original top cover area with a shell, utilizes the difference between the thickness of the shell and the cover plate, shortens the length of the top cover, significantly reduces the thickness of the replacement part, increases the internal space, reduces the waste of the cover plate in the vertical space, and can effectively improve the utilization rate of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an assembly diagram of a battery housing;

[0016] Figure 2 This is a schematic diagram of the explosion of the battery casing;

[0017] Figure 3 for Figure 2 A local enlarged view at point A;

[0018] Figure 4 This is a schematic diagram of a battery explosion;

[0019] Figure 5 This is the assembly diagram of the battery;

[0020] Figure 6 The internal structure diagram of the battery;

[0021] Figure 7 for Figure 6 A partial enlarged view at point B.

[0022] In the figure: shell 1 1, shell 2 2, recessed surface 3, step 4, avoidance groove 5, bare battery cell 6, top cover assembly 7, battery shell 10. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-Figure 7 A battery shell includes a battery shell 10, wherein the battery shell 10 is enclosed by a shell 1 and a shell 2 to form an accommodating space, and the accommodating space is used to accommodate a bare battery cell 6; a recessed surface 3 recessed inwardly is provided at the upper end of the battery shell 10, and an avoidance groove 5 for installing a top cover assembly 7 is opened on the recessed surface 3.

[0025] In the embodiment: Shell 1 and Shell 2 2 enclose the bare battery cell 6 in the middle accommodating space, a top cover assembly 7 is installed on the recessed surface 3 at the upper end of the battery shell 10, the top cover on the top cover assembly 7 overlaps the avoidance groove 5, the pole on the top cover assembly 7 passes through the avoidance groove 5 and is connected to the bare battery cell 6, and the adjacent edges of Shell 1 1 and Shell 2 2 and the overlaps with the top cover assembly 7 are sealed and fixed by welding.

[0026] In the embodiment: the recessed surface 3 can be set at any position on the upper end of the battery shell 10, preferably in the middle part of the upper end of the battery shell 10. At this time, there are bosses higher than the recessed surface 3 on both sides of the recessed surface 3 along the length direction. The boss area replaces the top cover. By utilizing the difference in thickness between the shell and the cover plate, the length of the top cover is shortened, the thickness of the replacement part is significantly reduced, the internal space is increased, and the waste of the cover plate in the vertical space is reduced, which can effectively improve the utilization rate of the battery.

[0027] The housing 1 is a frame-shaped structure with a notch, and the notch is provided on a concave surface 3 that is concave inwardly.

[0028] In the embodiment: the frame-shaped housing 1 and the housing 2 2 form a battery housing 10 with an accommodating space in the middle, and the accommodating space is used to accommodate the bare battery cell 6.

[0029] The shell 1 and the shell 2 2 are symmetrical structures.

[0030] In the embodiment, the housing 1 and the housing 2 are symmetrical to each other, and after being enclosed, a receiving space is formed in the middle of the frame.

[0031] The short side of the avoidance groove 5 is provided with an outwardly protruding step 4 .

[0032] In the embodiment: Figure 6 and Figure 7 As shown, the top cover on the top cover assembly 7 is provided with a boss that matches the step 4, and the boss on the top cover overlaps the step 4 and is finally sealed and fixed by welding.

[0033] The step 4 is located at the bottom of the recessed surface 3 .

[0034] In the embodiment, the step 4 at the bottom cooperates with the upper boss to support the top cover assembly 7 .

[0035] The height of the top cover assembly 7 in the avoidance groove 5 is less than or equal to the depth of the recessed surface 3 .

[0036] In the embodiment, the height of the top cover assembly 7 is less than or equal to the depth of the recessed surface 3 , so that the upper end surface of the top cover assembly 7 is not higher than the upper end surface of the battery housing 10 , and the present application does not impose any limitation on this.

[0037] A battery comprises the battery casing described in any one of the above items.

[0038] The utility model replaces the original top cover area with a shell, utilizes the difference between the thickness of the shell and the cover plate, shortens the length of the top cover, significantly reduces the thickness of the replacement part, increases the internal space, reduces the waste of the cover plate in the vertical space, and can effectively improve the utilization rate of the battery.

Claims

1. A battery housing, characterized in that: It includes a battery shell, which is formed by a shell one and a shell two to form a accommodating space, and the accommodating space is used to accommodate bare batteries; the upper end of the battery shell is provided with a concave surface that is concave inward, and the concave surface is provided with an avoidance groove for installing a top cover assembly.

2. The battery housing according to claim 1, characterized in that: The first shell is a frame-shaped structure with a notch, and the notch is arranged on a concave surface concave inwardly.

3. The battery housing according to claim 1 or 2, characterized in that: The shell 1 and the shell 2 are symmetrical structures.

4. The battery housing according to claim 1, characterized in that: The short side of the avoidance groove is provided with an outwardly protruding step.

5. The battery casing according to claim 4, characterized in that: The step is located at the bottom of the recessed surface.

6. The battery case according to claim 1, characterized in that: The height of the top cover assembly in the avoidance groove is less than or equal to the depth of the recessed surface.

7. A battery, characterized in that: A battery casing comprising the battery casing according to any one of claims 1 to 6.

Images