Battery cell shell, battery and electric equipment

Abstract

The utility model provides a battery cell shell, battery and electric equipment, relate to battery technical field, the battery cell shell includes shell and explosion-proof valve, the shell includes mounting wall and strengthening platform, strengthening platform protrudes the inside surface of mounting wall, the shell is equipped with mounting hole that passes through mounting wall and strengthening platform, the mounting wall is equipped with the explosion-proof valve, the explosion-proof valve is equipped with the explosion-proof valve, the explosion-proof valve is equipped with the explosion-proof valve, the explosion-proof valve is equipped with the explosion-proof valve, the explosion-proof valve is equipped with the explosion-proof valve, and the explosion-proof valve is equipped with the explosion-proof valve. The anti-explosion valve is arranged in the mounting hole, and the side wall of the anti-explosion valve is connected with the inner wall of the mounting hole. According to the battery cell shell, the structural strength of the mounting hole is improved, and the whole mounting wall does not need to be thickened, so that the processing difficulty and the material cost are reduced; the PACK box is prevented from being changed, and the PACK difficulty is reduced; and scratches to the protective film can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery cell casing, a battery, and an electrical device. Background Technology

[0002] The cell casing is the outer shell of the battery cell, primarily used to protect and encapsulate the battery materials and structure inside. The design of the cell casing significantly impacts the battery's performance, safety, and lifespan. Currently, cell casings typically consist of a housing and an explosion-proof valve located at the housing's mounting hole. When the internal pressure exceeds the detonation pressure, the explosion-proof valve opens its vent to release gas, thus achieving an explosion-proof function.

[0003] However, the current battery cell casing often deforms near the mounting hole, causing the explosion-proof valve to break before venting, affecting the safety of the battery cell. In order to improve the strength of the mounting hole and ensure safety, the existing battery cell casing usually thickens the side wall where the mounting hole is located. However, this reinforcement method increases the processing difficulty and the material cost of the battery cell casing. Utility Model Content

[0004] The problem solved by this utility model is to provide a mounting hole reinforcement solution that can reduce processing difficulty and material costs.

[0005] To solve the above problems, this utility model provides a battery cell casing, a battery, and an electrical device.

[0006] This utility model provides a battery cell housing, including a housing and an explosion-proof valve. The housing includes a mounting wall and a reinforcing platform. The reinforcing platform protrudes from the inner side of the mounting wall. The housing has a mounting hole that penetrates the mounting wall and the reinforcing platform. The explosion-proof valve is disposed in the mounting hole, and the side wall of the explosion-proof valve is connected to the inner wall of the mounting hole.

[0007] The beneficial effects of this utility model's battery cell housing are as follows: The reinforcing platform protruding from the inner side of the mounting wall increases the connection area between the mounting hole and the explosion-proof valve, making the area near the mounting hole less prone to deformation and improving the structural strength at the mounting hole. This eliminates the need to thicken the entire mounting wall, thus reducing processing difficulty and material costs. Simultaneously, if the battery cell housing surface has an excessively protruding structure, the protrusion would require the PACK box to make corresponding adjustments, increasing PACK difficulty. However, the explosion-proof valve in this solution does not protrude from the outer side of the mounting wall, ensuring a relatively flat surface for the battery cell housing, thereby avoiding PACK box modifications and reducing PACK difficulty. Furthermore, if the battery cell housing surface has an excessively protruding structure, the protrusion could easily scratch the protective film covering the battery cell housing. The explosion-proof valve in this solution does not protrude from the outer side of the mounting wall, ensuring a relatively flat surface for the battery cell housing, thus reducing scratches on the protective film.

[0008] Optionally, the thickness of the reinforcing platform is greater than or equal to 0.35 mm and less than the thickness of the mounting wall.

[0009] Optionally, it also includes a support ring platform, one end of which is connected to the inner side of the reinforcing platform, and the other end extends into the mounting hole, wherein the thickness of the support ring platform is less than the thickness of the reinforcing platform.

[0010] Optionally, the explosion-proof valve does not protrude beyond the mounting hole; and / or, the thickness of the mounting wall is less than or equal to 0.6 mm.

[0011] This utility model also provides a battery cell housing, including a housing and an explosion-proof valve. The housing includes a mounting wall and a reinforcing platform. The reinforcing platform includes a first reinforcing part protruding from the inner side of the mounting wall and a second reinforcing part protruding from the outer side of the mounting wall. The housing is provided with a mounting hole penetrating the first reinforcing part, the mounting wall and the second reinforcing part. The explosion-proof valve is disposed in the mounting hole, and the side wall of the explosion-proof valve is connected to the inner wall of the mounting hole.

[0012] The beneficial effects of this utility model's battery cell housing are as follows: The reinforcing platform consists of a first reinforcing part and a second reinforcing part. The first reinforcing part protrudes from the inner side of the mounting wall, while the second reinforcing part protrudes from the outer side of the mounting wall. The combination of these two parts increases the connection area between the mounting hole and the explosion-proof valve, making the area near the mounting hole less prone to deformation and improving the structural strength at the mounting hole. This eliminates the need to thicken the entire mounting wall, thus reducing processing difficulty and material costs. Furthermore, if the battery cell housing surface has an excessively protruding structure, the protrusion would require the PACK box to make corresponding adjustments, increasing the difficulty of PACK assembly. In this design, the explosion-proof valve, with its first reinforcing section already strengthening the structural strength at the mounting hole, allows for a relatively thin second reinforcing section, preventing it from protruding excessively from the outer surface of the mounting wall. This reduces the need for modifications to the pack box and simplifies packing. Furthermore, if the cell shell surface has an excessively protruding structure, the protrusion can easily scratch the protective film covering the cell shell. In contrast, the explosion-proof valve in this design, with its first reinforcing section already strengthening the structural strength at the mounting hole, allows for a relatively thin second reinforcing section, preventing it from protruding excessively from the outer surface of the mounting wall and thus reducing scratches on the protective film.

[0013] Optionally, it also includes a support ring platform, one end of which is connected to the inner side of the first reinforcing part, and the other end extends into the mounting hole. The thickness of the support ring platform is less than the sum of the thickness of the first reinforcing part and the thickness of the second reinforcing part.

[0014] The side wall of the explosion-proof valve is connected to the inner wall of the mounting hole located at the second reinforcing part.

[0015] Optionally, the thickness of the first reinforcing part is greater than or equal to 0.2 mm and less than or equal to 0.35 mm;

[0016] The thickness of the second reinforcing part is greater than or equal to 0.1 mm and less than or equal to 0.25 mm.

[0017] Optionally, the explosion-proof valve does not protrude beyond the mounting hole; and / or, the thickness of the mounting wall is less than or equal to 0.6 mm.

[0018] This utility model also provides a battery, including the cell casing as described above.

[0019] This utility model also provides an electrical device, including the battery described above. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery cell casing according to the first embodiment of the present invention;

[0021] Figure 2 for Figure 1 Cross-sectional view of the core casing of the battery;

[0022] Figure 3 for Figure 2 Enlarged schematic diagram of part I of the battery core casing;

[0023] Figure 4 for Figure 2 A partial structural diagram of the battery cell casing;

[0024] Figure 5 This is a schematic diagram of the battery cell casing according to the second embodiment of the present invention;

[0025] Figure 6 for Figure 5 Cross-sectional view of the core casing of the battery;

[0026] Figure 7 for Figure 6 Enlarged schematic diagram of part II of the battery core casing;

[0027] Figure 8 for Figure 6 A partial structural diagram of the battery core casing.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Shell; 11. Mounting wall; 12. Reinforcing platform; 13. Mounting hole; 14. First reinforcing part; 15. Second reinforcing part; 2. Explosion-proof valve; 3. Support ring platform. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0031] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as the front and back position, with the positive direction of the X-axis representing the front and the negative direction representing the back. The Y-axis represents the left and right position, with the positive direction of the Y-axis representing the left and the negative direction representing the right. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0033] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0034] This utility model provides a battery cell housing that improves the structural strength of the mounting holes while reducing processing difficulty and material costs. Figures 1 to 4 The image shown is of the battery cell casing according to the first embodiment of this utility model. Figures 5 to 8 The image shown is of the battery cell casing according to the second embodiment of this utility model. A detailed description will follow with reference to specific embodiments.

[0035] like Figures 1-3As shown, the first embodiment provides a battery cell housing, including a housing 1 and an explosion-proof valve 2. The housing 1 includes a mounting wall 11 and a reinforcing platform 12. The reinforcing platform 12 protrudes from the inner side of the mounting wall 11. The housing 1 is provided with a mounting hole 13 that penetrates the mounting wall 11 and the reinforcing platform 12. The explosion-proof valve 2 is disposed in the mounting hole 13, and the side wall of the explosion-proof valve 2 is connected to the inner wall of the mounting hole 13.

[0036] In this technical solution, the reinforcing platform 12 protruding from the inner side of the mounting wall 11 increases the connection area between the mounting hole 13 and the explosion-proof valve 2, making the area near the mounting hole 13 less prone to deformation and improving the structural strength at the mounting hole 13. This eliminates the need to thicken the entire mounting wall 11, thus reducing processing difficulty and material costs. Simultaneously, if the surface of the battery cell shell has an excessively protruding structure, the protrusion would require the PACK box to make corresponding adjustments, increasing the PACK difficulty. However, in this solution, the explosion-proof valve 2 does not protrude from the outer side of the mounting wall 11, ensuring a relatively flat surface for the battery cell shell, thereby avoiding changes to the PACK box and reducing PACK difficulty. Furthermore, if the surface of the battery cell shell has an excessively protruding structure, the protrusion could easily scratch the protective film covering the battery cell shell. In this solution, the explosion-proof valve 2 does not protrude from the outer side of the mounting wall 11, ensuring a relatively flat surface for the battery cell shell, thus reducing scratches on the protective film.

[0037] Furthermore, such as Figure 4 As shown, the thickness T1 of the reinforcing platform 12 is greater than or equal to 0.35 mm and less than the thickness T of the mounting wall 11.

[0038] In this design, the thickness T1 of the reinforcing platform 12 is limited to between 0.35mm and the thickness T of the mounting wall 11, which can effectively ensure the reinforcing effect on the mounting hole 13.

[0039] Furthermore, such as Figure 3 and Figure 4 As shown, the battery cell housing also includes a support ring platform 3. One end of the support ring platform 3 is connected to the inner side of the reinforcing platform 12, and the other end extends into the mounting hole 13. The thickness T2 of the support ring platform 3 is less than the thickness T1 of the reinforcing platform 12.

[0040] In this design, by adding a support ring platform 3, with one end of the support ring platform 3 connected to the inner side of the reinforcing platform 12 and the other end extending into the mounting hole 13, the explosion-proof valve 2 can be supported on the support ring platform 3 when welding the side wall of the explosion-proof valve 2 to the inner wall of the mounting hole 13. The support ring platform 3 can prevent the welding slag generated during welding from entering the housing 1. At the same time, when the battery cell housing needs to discharge gas through the vent of the explosion-proof valve 2, the support ring platform 3 can also block the gas rushing towards the weld between the side wall of the explosion-proof valve 2 and the inner wall of the mounting hole 13, preventing the weld from cracking and further improving the structural strength at the mounting hole 13.

[0041] Furthermore, such as Figure 3 and Figure 4 As shown, the explosion-proof valve 2 does not protrude from the mounting hole 13; and / or, the thickness T of the mounting wall 11 is less than or equal to 0.6 mm.

[0042] It should be noted that the aforementioned settings for the thickness of the explosion-proof valve 2 and the mounting wall 11 can be selected individually or simultaneously, and this utility model does not impose any restrictions on this.

[0043] In this solution, by ensuring that the explosion-proof valve 2 does not protrude beyond the mounting hole 13, the protrusion phenomenon on the surface of the battery cell casing can be better mitigated, further reducing PACK difficulty and improving protection film scratches. In this solution, by ensuring that the thickness of the mounting wall 11 is less than or equal to 0.6mm, the battery cell casing can be kept lightweight, reducing material costs.

[0044] Furthermore, such as Figure 4 As shown, the width T3 of the reinforcing table 12 is greater than the thickness T of the mounting wall 11. This arrangement facilitates material flow during the extrusion molding of the reinforcing table 12 and prevents the laser from penetrating the reinforcing table 12 during laser welding.

[0045] like Figures 5-7 As shown, the second embodiment provides a battery cell housing, including a housing 1 and an explosion-proof valve 2. The housing 1 includes a mounting wall 11 and a reinforcing platform 12. The reinforcing platform 12 includes a first reinforcing part 14 protruding from the inner side of the mounting wall 11 and a second reinforcing part 15 protruding from the outer side of the mounting wall 11. The housing 1 is provided with a mounting hole 13 penetrating the first reinforcing part 14, the mounting wall 11 and the second reinforcing part 15. The explosion-proof valve 2 is disposed in the mounting hole 13, and the side wall of the explosion-proof valve 2 is connected to the inner wall of the mounting hole 13.

[0046] In this technical solution, the reinforcing platform 12 consists of a first reinforcing part 14 and a second reinforcing part 15. The first reinforcing part 14 protrudes from the inner side of the mounting wall 11, while the second reinforcing part 15 protrudes from the outer side of the mounting wall 11. The combination of these two parts increases the connection area between the mounting hole 13 and the explosion-proof valve 2, making the area near the mounting hole 13 less prone to deformation and improving the structural strength at the mounting hole 13. This eliminates the need to thicken the entire mounting wall 11, thus reducing processing difficulty and material costs. Furthermore, if the surface of the battery cell casing has an excessively protruding structure, the protrusion would require the PACK box to make corresponding adjustments, increasing the PACK complexity. However, this... In this design, the explosion-proof valve 2, based on the structural strength of the mounting hole 13 reinforced by the first reinforcing part 14, allows the second reinforcing part 15 to have a relatively small thickness, preventing it from protruding excessively from the outer side of the mounting wall 11. This reduces the degree of modification required to the PACK box and lowers the difficulty of PACK assembly. Furthermore, if the surface of the battery cell shell has an excessively protruding structure, the protrusion can easily scratch the protective film covering the battery cell shell. In this design, the explosion-proof valve 2, based on the structural strength of the mounting hole 13 reinforced by the first reinforcing part 14, allows the second reinforcing part 15 to have a relatively small thickness, preventing it from protruding excessively from the outer side of the mounting wall 11, thereby reducing scratches on the protective film.

[0047] Furthermore, such as Figure 7 and Figure 8 As shown, the battery cell housing also includes a support ring platform 3. One end of the support ring platform 3 is connected to the inner side of the first reinforcing part 14, and the other end extends into the mounting hole 13. The thickness T2 of the support ring platform 3 is less than the sum of the thickness T11 of the first reinforcing part 14 and the thickness T12 of the second reinforcing part 15. The side wall of the explosion-proof valve 2 is connected to the inner wall of the mounting hole 13 located at the second reinforcing part 15.

[0048] In this design, by adding the support ring platform 3, with one end of the support ring platform 3 connected to the inner side of the first reinforcing part 14 and the other end extending into the mounting hole 13, the explosion-proof valve 2 can be supported on the support ring platform 3 when welding the side wall of the explosion-proof valve 2 to the inner wall of the mounting hole 13. The support ring platform 3 can prevent the welding slag generated during welding from entering the housing 1. At the same time, when the battery cell housing needs to discharge gas through the vent of the explosion-proof valve 2, the support ring platform 3 can also block the gas rushing towards the weld between the side wall of the explosion-proof valve 2 and the inner wall of the mounting hole 13, preventing the weld from cracking and further improving the structural strength at the mounting hole 13.

[0049] Furthermore, such as Figure 8 As shown, the thickness T11 of the first reinforcing part 14 is greater than or equal to 0.2 mm and less than or equal to 0.35 mm; the thickness T12 of the second reinforcing part 15 is greater than or equal to 0.1 mm and less than or equal to 0.25 mm.

[0050] In this solution, by limiting the thickness T11 of the first reinforcing part 14 to 0.2mm and 0.35mm, and the thickness T12 of the second reinforcing part 15 to 0.1mm and 0.25mm, it is possible to ensure both the increased structural strength of the mounting hole 13 and that the first reinforcing part 14 does not penetrate too deeply into the housing 1, thereby ensuring that there is a sufficient gap between the first reinforcing part 14 and the internal structure of the battery cell housing to help with venting.

[0051] Furthermore, such as Figure 7 and Figure 8 As shown, the explosion-proof valve 2 does not protrude from the mounting hole 13; and / or, the thickness T of the mounting wall 11 is less than or equal to 0.6 mm.

[0052] It should be noted that the aforementioned settings for the thickness of the explosion-proof valve 2 and the mounting wall 11 can be selected individually or simultaneously, and this utility model does not impose any restrictions on this.

[0053] In this solution, by ensuring that the explosion-proof valve 2 does not protrude beyond the mounting hole 13, the protrusion phenomenon on the surface of the battery cell casing can be better mitigated, further reducing PACK difficulty and improving protection film scratches. In this solution, by ensuring that the thickness T of the mounting wall 11 is less than or equal to 0.6 mm, the battery cell casing can be made lighter, reducing material costs.

[0054] Furthermore, the width T31 ​​of the first reinforcing part 14 is greater than the thickness T of the mounting wall 11. This arrangement facilitates material flow during the extrusion molding of the first reinforcing part 14 and prevents the laser from penetrating the first reinforcing part 14 during laser welding.

[0055] This utility model also provides a battery, including the cell casing as described above.

[0056] In this technical solution, since the battery uses the aforementioned cell casing, it has all the technical effects brought about by the cell casings of the above embodiments, which will not be repeated here.

[0057] This utility model also provides an electrical device, including the battery described above.

[0058] It should be noted that the electrical equipment can be the vehicle using the battery. When the battery is used in a vehicle, it can be installed at the bottom of the vehicle with the explosion-proof valve 2 facing the ground. This can prevent the electrolyte and high-temperature, high-pressure gas from being sprayed at the passengers when the explosion-proof valve 2 is detonated, thereby improving safety.

[0059] In this technical solution, since the electrical device includes the battery described above, it has the technical effects brought about by the battery cell casing of all the above embodiments, which will not be repeated here.

[0060] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A battery cell casing, characterized in that, The device includes a housing (1) and an explosion-proof valve (2). The housing (1) includes a mounting wall (11) and a reinforcing platform (12). The reinforcing platform (12) protrudes from the inner side of the mounting wall (11). The housing (1) has a mounting hole (13) that passes through the mounting wall (11) and the reinforcing platform (12). The explosion-proof valve (2) is located in the mounting hole (13), and the side wall of the explosion-proof valve (2) is connected to the inner wall of the mounting hole (13).

2. The cell casing according to claim 1, characterized in that, The thickness of the reinforcing platform (12) is greater than or equal to 0.35 mm and less than the thickness of the mounting wall (11).

3. The cell casing according to claim 1, characterized in that, It also includes a support ring platform (3), one end of which is connected to the inner side of the reinforcing platform (12), and the other end extends into the mounting hole (13). The thickness of the support ring platform (3) is less than the thickness of the reinforcing platform (12).

4. The cell casing according to claim 1, characterized in that, The explosion-proof valve (2) does not protrude from the mounting hole (13); and / or the thickness of the mounting wall (11) is less than or equal to 0.6 mm.

5. A battery cell casing, characterized in that, The device includes a housing (1) and an explosion-proof valve (2). The housing (1) includes a mounting wall (11) and a reinforcing platform (12). The reinforcing platform (12) includes a first reinforcing part (14) protruding from the inner side of the mounting wall (11) and a second reinforcing part (15) protruding from the outer side of the mounting wall (11). The housing (1) is provided with a mounting hole (13) penetrating the first reinforcing part (14), the mounting wall (11) and the second reinforcing part (15). The explosion-proof valve (2) is disposed in the mounting hole (13), and the side wall of the explosion-proof valve (2) is connected to the inner wall of the mounting hole (13).

6. The cell casing according to claim 5, characterized in that, It also includes a support ring platform (3), one end of which is connected to the inner side of the first reinforcing part (14), and the other end extends into the mounting hole (13). The thickness of the support ring platform (3) is less than the sum of the thickness of the first reinforcing part (14) and the thickness of the second reinforcing part (15). The side wall of the explosion-proof valve (2) is connected to the inner wall of the mounting hole (13) located at the second reinforcing part (15).

7. The cell casing according to claim 5, characterized in that, The thickness of the first reinforcing part (14) is greater than or equal to 0.2 mm and less than or equal to 0.35 mm; The thickness of the second reinforcing part (15) is greater than or equal to 0.1 mm and less than or equal to 0.25 mm.

8. The cell casing according to claim 5, characterized in that, The explosion-proof valve (2) does not protrude from the mounting hole (13); and / or the thickness of the mounting wall (11) is less than or equal to 0.6 mm.

9. A battery, characterized in that, Includes the cell casing as described in any one of claims 1-8.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.

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