Battery shell and battery
By adopting a three-layer housing structure battery design, the insulation between the bare battery cell and the shell and the external environment is achieved, solving the problems of many components, high costs and cumbersome operations in the prior art, and improving production efficiency and assembly safety.
Patent Information
- Application Number
- CN202420344641.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-23
AI Technical Summary
The existing battery insulation technology has many components, high costs and cumbersome operations, resulting in reduced production efficiency.
A three-layer housing structure is adopted, wherein the first housing is used to insulate and isolate the second housing from the bare core, the second housing is made of conductive material, and the third housing is used to insulate and isolate the second housing from the external environment, thereby realizing a housing structure that is insulated from the inside to the outside.
Replaced with the traditional cladding process, improve production efficiency, and enhance the thickness of the battery case, and improve the safety of the bare cell and battery case.
Smart Images
Figure CN222637439U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to a battery casing and a battery. Background Art
[0002] Generally, in the field of battery technology, in order to prevent tiny metal burrs on the aluminum shell from piercing the isolation membrane and causing the tabs and the shell to overlap, mylar is needed to cover the bare battery cell; in order to prevent the two sides of the bottom of the bare battery cell from interfering with the inner wall of the shell and causing a short circuit, an insulating bottom support plate is needed to raise the bare battery cell; in order to ensure insulation between batteries, a blue film including the outer wall of the shell is needed.
[0003] However, the inventors have found through research that the existing insulation technology has many components, high costs, and complicated operations, resulting in reduced production efficiency. Utility Model Content
[0004] The utility model aims to provide a battery casing and a battery, which can simultaneously achieve insulation between a bare battery cell and the casing and between the external environment and the casing, thereby replacing the coating process and improving production efficiency.
[0005] The embodiment of the utility model is achieved as follows:
[0006] In the first aspect, the utility model provides a battery shell, including a first shell, a second shell and a third shell, and the first shell is provided with an inner cavity for placing a bare battery cell, the first shell is arranged in the second shell, the second shell is arranged in the third shell, and the second shell is made of a conductive material, the first shell is used to insulate and isolate the second shell from the bare battery cell, and the third shell is used to insulate and isolate the second shell from the external environment.
[0007] In an optional embodiment, the first shell, the second shell and the third shell are all square structures with one end open.
[0008] In an optional embodiment, a direction perpendicular to the plane where the opening is located is defined as a height direction, and a height of a top surface of the first shell is lower than a height of a top surface of the second shell.
[0009] In an optional embodiment, the battery housing further includes a top cover, a bottom surface of the top cover is connected to the top surface of the first housing, and a side wall of the top cover is connected to the inner wall of the second housing.
[0010] In an optional embodiment, the top surface of the top cover, the top surface of the second shell, and the top surface of the third shell are located at the same horizontal height.
[0011] In an optional embodiment, the inner wall of the second shell is welded to the side wall of the top cover.
[0012] In an optional embodiment, the first shell, the second shell and the third shell are integrally formed.
[0013] In an optional implementation, the first shell and the third shell are both made of insulating material.
[0014] In an optional embodiment, the first shell and the third shell are both disposed on the second shell by spraying or injection molding.
[0015] In a second aspect, the utility model provides a battery, comprising a bare cell and a battery shell as described in any one of the aforementioned embodiments, wherein the bare cell is disposed in an inner cavity of a first shell.
[0016] The beneficial effects of the embodiments of the utility model include:
[0017] The utility model provides a battery shell and a battery, which include a first shell, a second shell and a third shell. The first shell is provided with an inner cavity for placing a bare cell, the first shell is arranged in the second shell, the second shell is arranged in the third shell, and the second shell is made of a conductive material, the first shell is used to insulate and isolate the second shell from the bare cell, and the third shell is used to insulate and isolate the second shell from the external environment. Based on the above arrangement, the battery shell, on the one hand, forms an insulating, conductive, and insulated shell structure from the inside to the outside, replaces the coating process, and improves production efficiency; on the other hand, it enhances and ensures the thickness of the battery shell, and improves the safety of the bare cell and the battery shell during assembly. 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 embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic diagram of a battery housing provided by an embodiment of the utility model;
[0020] Figure 2 A partial cross-sectional schematic diagram of a battery housing provided by an embodiment of the utility model;
[0021] Figure 3 Another partial cross-sectional schematic diagram of a battery housing provided by an embodiment of the utility model;
[0022] Figure 4 Another partial cross-sectional schematic diagram of a battery housing provided by an embodiment of the utility model;
[0023] Figure 5A schematic diagram of a battery provided by an embodiment of the utility model;
[0024] Figure 6 A schematic diagram of a battery cell provided in an embodiment of the utility model.
[0025] Icon: 10 -battery; 100 -battery shell; 110 -first shell; 130 -second shell; 150 -third shell; 300 -top cover; 500 -bare cell. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0029] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.
[0032] As mentioned in the background technology, the existing insulation technology has many components, high cost, and cumbersome operation, resulting in reduced production efficiency. In order to improve the above problems, the utility model proposes a battery shell and a battery, which, by setting a three-layer shell, simultaneously achieves insulation between the bare battery cell and the shell and between the external environment and the shell, thereby replacing the coating process and improving production efficiency.
[0033] Figure 1 For a schematic diagram of a battery housing 100 provided in an embodiment of the present utility model, please refer to Figure 1 The utility model provides a battery shell 100, which includes a first shell 110, a second shell 130 and a third shell 150. The first shell 110 is provided with an inner cavity for placing a bare battery cell 500, the first shell 110 is arranged in the second shell 130, the second shell 130 is arranged in the third shell 150, and the second shell 130 is made of a conductive material. The first shell 110 is used to insulate and isolate the second shell 130 from the bare battery cell 500, and the third shell 150 is used to insulate and isolate the second shell 130 from the external environment.
[0034] Specifically, the first shell 110 is connected to the inner wall of the second shell 130 to achieve insulation between the inner cavity of the first shell 110 and the second shell 130, and to avoid electrical connection between the bare battery cell 500 in the inner cavity of the first shell 110 and the second shell 130 during assembly, which affects the safety and service life of the battery 10. Similarly, the third shell 150 is connected to the outer wall of the second shell 130 to achieve insulation between the external environment and the second shell 130, and to avoid electrical connection between the second shell 130 and other battery objects, causing unnecessary power loss. It is understandable that the external environment specifically refers to other battery objects.
[0035] Based on the above configuration, it can be understood that the battery housing 100 provided by the present invention can replace the coating process in the prior art and improve production efficiency. In addition, it should be noted that, due to the nesting of the first housing 110, the second housing 130 and the third housing 150, on the one hand, an insulating, conductive and insulating housing structure is formed from the inside to the outside; on the other hand, the thickness of the battery housing 100 is enhanced and guaranteed, and the safety of the bare battery cell 500 when assembled with the battery housing 100 is improved.
[0036] In some embodiments, Figure 2 As shown, the first shell 110, the second shell 130 and the third shell 150 are integrally formed. It can be understood that the integral formation of the first shell 110 and the second shell 130 can simplify the production process of the battery shell 100 and improve the production efficiency of the battery shell 100.
[0037] In other embodiments, the first shell 110 and the third shell 150 are disposed on the second shell 130 by spraying or injection molding. Specifically, the first shell 110 and the third shell 150 are respectively coated on the inner wall and the outer wall of the second shell 130 by spraying, or the first shell 110 and the third shell 150 are respectively molded on the inner wall and the outer wall of the second shell 130 by injection molding.
[0038] It should be noted that solutions equivalent to this embodiment that can achieve the effects of the embodiment are all within the scope of the disclosure of the present utility model. For example, the first shell 110 and the third shell 150 can also be arranged on the inner wall and the outer wall of the second shell 130 by electrophoresis or bonding.
[0039] Furthermore, the first shell 110 and the third shell 150 are both made of insulating materials. Specifically, the first shell 110 can be made of, but not limited to, PET (polyethylene terephthalate) or PA (polyamide resin) or resin. Since the materials that can be selected for the third shell 150 are similar to those for the first shell 110, they are not described here. In addition, the second shell 130 can be made of, but not limited to, metal materials.
[0040] Please refer again Figure 1 In this embodiment, in order to facilitate the assembly of the bare cell 500 and the battery housing 100, the first housing 110, the second housing 130 and the third housing 150 are all square structures with one end open. It can be understood that the opening ends of the first housing 110, the second housing 130 and the third housing 150 are located on the same side. That is to say, the second housing 130 is embedded from the opening end of the third housing 150, and the first housing 110 is embedded from the opening end of the second housing 130, and the bare cell 500 is assembled from the opening end of the first housing 110.
[0041] See also Figure 3 In order to reserve assembly space for other electrical components, the direction perpendicular to the plane where the opening is located is defined as the height direction, and the top surface height of the first shell 110 is lower than the top surface height of the second shell 130. Based on the above settings, the purpose of facilitating the assembly of other electrical components in subsequent links is achieved.
[0042] See also Figure 4 In order to seal the open end of the battery housing 100, the battery housing 100 further includes a top cover 300, the bottom surface of the top cover 300 is connected to the top surface of the first housing 110, and the side wall of the top cover 300 is connected to the inner wall of the second housing 130. Optionally, the inner wall of the second housing 130 is welded to the side wall of the top cover 300 to enhance the sealing effect.
[0043] Furthermore, the top surface of the top cover 300, the top surface of the second shell 130, and the top surface of the third shell 150 are located at the same horizontal height. Through the above arrangement, the top cover 300 can achieve the technical effect of simultaneously sealing the opening end of the first shell 110, the opening end of the second shell 130, and the opening end of the third shell 150, and strengthen insulation protection. In addition, in other embodiments, the height of the top cover 300 can be specifically set to be no greater than the height difference between the top surface of the first shell 110 and the top surface of the second shell 130.
[0044] In summary, the utility model provides a battery shell 100, which includes a first shell 110, a second shell 130 and a third shell 150. Among them, the first shell 110 is provided with an inner cavity for placing a bare battery cell 500, the first shell 110 is arranged in the second shell 130, the second shell 130 is arranged in the third shell 150, and the second shell 130 is made of a conductive material, the first shell 110 is used to insulate and isolate the second shell 130 from the bare battery cell 500, and the third shell 150 is used to insulate and isolate the second shell 130 from the external environment. Based on the above arrangement, the battery shell 100, on the one hand, forms an insulating, conductive, and insulated shell structure from the inside to the outside, replaces the coating process, and improves production efficiency; on the other hand, it enhances and ensures the thickness of the battery shell 100, and improves the safety of the bare battery cell 500 and the battery shell 100 during assembly.
[0045] Also, see Figure 5 The present application also provides a battery 10, comprising a bare cell 500 and a battery housing 100 as described in the above embodiment, wherein the bare cell 500 is disposed in the inner cavity of the first housing 110. Figure 6As shown. Since the battery 10 includes the battery case 100 of the aforementioned embodiment, it can also form an insulating, conductive, and insulating shell structure from the inside to the outside, replace the coating process, and improve production efficiency; on the other hand, it can enhance and ensure the thickness of the battery case 100, and improve the safety of the bare battery 500 when assembled with the battery case 100.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A battery housing, characterized in that: The invention comprises a first shell (110), a second shell (130) and a third shell (150), wherein the first shell (110) is provided with an inner cavity for placing a bare battery cell (500), the first shell (110) is arranged in the second shell (130), the second shell (130) is arranged in the third shell (150), and the second shell (130) is made of a conductive material, the first shell (110) is used for insulating and isolating the second shell (130) from the bare battery cell (500), and the third shell (150) is used for insulating and isolating the second shell (130) from the external environment.
2. The battery housing according to claim 1, characterized in that: The first shell (110), the second shell (130) and the third shell (150) are all square structures with one end open.
3. The battery housing according to claim 2, characterized in that: The direction perpendicular to the plane where the opening is located is defined as the height direction, and the top surface height of the first shell (110) is lower than the top surface height of the second shell (130).
4. The battery case according to claim 3, characterized in that: The battery housing (100) further comprises a top cover (300), the bottom surface of the top cover (300) being connected to the top surface of the first housing (110), and the side wall of the top cover (300) being connected to the inner wall of the second housing (130).
5. The battery casing according to claim 4, characterized in that: The top surface of the top cover (300), the top surface of the second shell (130), and the top surface of the third shell (150) are located at the same horizontal height.
6. The battery case according to claim 4, characterized in that: The inner wall of the second shell (130) is welded to the side wall of the top cover (300).
7. The battery housing according to any one of claims 1 to 6, characterized in that: The first shell (110), the second shell (130) and the third shell (150) are integrally formed.
8. The battery housing according to any one of claims 1 to 6, characterized in that: The first shell (110) and the third shell (150) are both made of insulating material.
9. The battery housing according to any one of claims 1 to 6, characterized in that: The first shell (110) and the third shell (150) are both arranged on the second shell (130) by spraying or injection molding.
10. A battery, characterized in that: It comprises a bare battery cell (500) and a battery shell (100) as claimed in any one of claims 1 to 9, wherein the bare battery cell (500) is arranged in the inner cavity of the first shell (110).