Shell for battery, battery, battery device and electric equipment
By using metal materials with different coefficients of thermal expansion on the side walls and the first metal layer of the battery case, the risk of liquid leakage caused by thermal expansion deformation of the battery case is solved, the structural strength and safety of the battery are improved, the battery life is extended, and the assembly flexibility and versatility are improved.
Patent Information
- Application Number
- CN202420658015.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The existing battery case is susceptible to thermal expansion and deformation, resulting in risk of battery leakage, and the thermal expansion coefficient of metal materials is large and the volume changes are greater.
A housing for a battery is designed, with the side walls and the first metal layer of both metal materials, but with different coefficients of thermal expansion. The first metal layer is provided on the side wall surface, and deformation of the case and battery body is suppressed by the difference in the thermal expansion coefficient.
It effectively suppresses the deformation of the battery due to heat expansion, improves the structural strength and safety of the battery, extends the service life of the battery, and improves the flexibility and versatility of assembly.
Smart Images
Figure CN222980657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery housing, a battery, a battery device and an electrical equipment for a battery. Background Art
[0002] In the prior art, during the operation of a battery, heat is generated, and the housing of the battery is prone to thermal expansion and deformation, which may lead to risks such as battery leakage. At the same time, in the prior art, the housing of the battery is often made of a metal material. At the same temperature, the volume change of a metal material with a large coefficient of thermal expansion is greater. Based on this, we propose a housing for a battery. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is as follows: In the existing battery, heat is generated during operation, and the housing of the battery is prone to thermal expansion and deformation, which may lead to risks such as battery leakage. At the same time, in the prior art, the housing of the battery is often made of a metal material. At the same temperature, the volume change of a metal material with a large coefficient of thermal expansion is greater. Based on this, we propose a battery housing, a battery, a battery device and an electrical equipment for a battery.
[0004] To solve the above technical problem, on the one hand, the present disclosure provides a housing for a battery. The interior of the housing is adapted to accommodate a battery body. The housing includes a side wall and a first metal layer connected to each other. Both the first metal layer and the side wall are made of metal materials, and the coefficient of thermal expansion of the first metal layer is different from that of the side wall.
[0005] As a further technical solution of the utility model, the first metal layer is disposed on the surface of the side wall.
[0006] As a further technical solution of the utility model, the housing includes two side walls oppositely disposed along the thickness direction, and both of the two side walls are connected with the first metal layer.
[0007] As a further technical solution of the utility model, the first metal layer is connected to the outer surface of the side wall, and the coefficient of thermal expansion of the first metal layer is less than that of the side wall.
[0008] On the other hand, the first metal layer is connected to the inner surface of the side wall, and the coefficient of thermal expansion of the first metal layer is greater than that of the side wall.
[0009] As a further technical solution of the utility model, the material of the side wall is one of aluminum metal, silver metal and tungsten metal, and the material of the first metal layer is one of copper metal, iron metal and gold metal.
[0010] On the other hand, the material of the side wall is one of metallic aluminum, metallic iron, and metallic gold, and the material of the first metal layer is one of metallic cadmium, metallic tungsten, and metallic molybdenum.
[0011] As a further technical solution of the present utility model, the thickness of the first metal layer is 0.2 mm - 1 mm.
[0012] On the other hand, the present disclosure also provides a battery, including the above-mentioned outer shell and battery body, and the battery body is disposed inside the outer shell.
[0013] On the other hand, the present disclosure also provides a battery device, including the above-mentioned battery.
[0014] On the other hand, the present disclosure also provides an electrical equipment, including the above-mentioned battery device or the above-mentioned battery.
[0015] The beneficial effects according to the present utility model are as follows: Through the setting of the first metal layer, by utilizing the different coefficients of thermal expansion of the side wall and the first metal layer, during the heating process caused by the operation of the battery, the deformation of the outer shell and the battery body due to thermal expansion can be inhibited. At the same time, the setting of the first metal layer is also more conducive to heat conduction and heat dissipation, strengthening the structural strength of the battery, having high safety, improving the maintainability of the battery, being flexible in assembly, easy to be platformized, having better versatility, and the battery is not prone to deformation and bulging. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 is a schematic structural diagram of a battery provided by an embodiment of the present utility model;
[0018] Figure 2 is Figure 1 a disassembled partial structural diagram;
[0019] Figure 3 is the Figure 1 side view of the present utility
[0020] Figure 4 is a partial side cross-sectional view of a battery provided by an embodiment of the present utility model;
[0021] Figure 5 is a partial side cross-sectional view of a battery provided by another embodiment of the present utility model.
[0022] The reference signs in the description are as follows:
[0023] 1. Battery main body; 2. Outer shell; 21. Side wall; 22. First metal layer. Detailed implementation manners
[0024] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.
[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference signs denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.
[0026] A housing for a battery, a battery, a battery device and an electrical equipment according to the present utility model will be described in detail below.
[0027] In an embodiment of the present disclosure, please refer to Figures 1 to 4 , a housing 2 for a battery, the interior of the housing 2 is adapted to be provided with a battery main body 1. The housing 2 includes a side wall 21 and a first metal layer 22 connected to each other. Both the first metal layer 21 and the side wall 22 are made of metal materials, and the coefficient of thermal expansion of the first metal layer 22 is different from that of the side wall 21. Specifically, the battery main body 1 is formed by laminating or winding a positive electrode sheet, a separator and a negative electrode sheet. Specifically, the side wall corresponds to the large surface of the battery main body 1, and the large surface is perpendicular to the thickness direction of the battery main body 1.
[0028] The first metal layer 22 is disposed on the surface of the side wall 21. Specifically, the surface of the side wall 21 may be an inner surface or an outer surface, and the first metal layer 22 may also be embedded in the side wall.
[0029] The housing 2 includes two side walls 21 disposed opposite to each other in the thickness direction, and the first metal layer 22 is connected to both of the two side walls 21.
[0030] The first metal layer 22 is bonded to the side wall 21 or is an integral structure. The bonding method may be one of adhesive bonding and nested plates, and the integral structure may be one of electroplating, coating and additive manufacturing.
[0031] The first metal layer 22 is connected to the outer surface of the side wall 21, and the coefficient of thermal expansion of the first metal layer 22 is less than that of the side wall 21.
[0032] The side wall 21 is one of aluminum metal, silver metal, and tungsten metal, and the first metal layer 22 is one of copper metal, iron metal, and gold metal.
[0033] The thickness of the first metal layer 22 is set to 0.2 mm.
[0034] In this embodiment, a first metal layer 22 with a thickness of 0.2 mm is provided for the outer shell of the battery, and the first metal layer 22 is disposed on the outer surface of the side wall 21 of the outer shell 2. When the temperature rises during the operation of the battery, the deformation amount of the side wall 21 is greater than that of the first metal layer 22, and the outward expansion of the side wall 21 due to heat is inhibited, hindering the deformation of the outer shell 2 and the battery body 1.
[0035] In another embodiment of the present disclosure, please refer to Figures 1 to 4 , an outer shell 2 for a battery, the interior of the outer shell 2 is adapted to accommodate a battery body 1, the outer shell 2 includes a side wall 21 and a first metal layer 22 connected to each other, both the first metal layer 21 and the side wall 22 are made of metal materials, and the coefficient of thermal expansion of the first metal layer 22 is different from that of the side wall 21. Specifically, the battery body 1 is formed by laminating or winding a positive electrode sheet, a separator, and a negative electrode sheet. Specifically, the side wall corresponds to the large surface of the battery body 1, and the large surface is perpendicular to the thickness direction of the battery body 1.
[0036] The first metal layer 22 is disposed on the surface of the side wall 21. Specifically, the surface of the side wall 21 may be an inner surface or an outer surface, and the first metal layer 22 may also be embedded in the side wall.
[0037] The outer shell 2 includes two side walls 21 oppositely disposed along the thickness direction, and both of the two side walls 21 are connected with the first metal layer 22.
[0038] The first metal layer 22 is bonded to or is an integral structure with the side wall 21. The bonding method may be one of adhesive bonding and nesting plates, and the integral structure may be one of electroplating, coating, and additive manufacturing.
[0039] The first metal layer 22 is connected to the inner surface of the side wall 21, and the coefficient of thermal expansion of the first metal layer 22 is greater than that of the side wall 21.
[0040] The material of the side wall 21 is one of aluminum metal, iron metal, and gold metal, and the material of the first metal layer 22 is one of cadmium metal, tungsten metal, and molybdenum metal.
[0041] The thickness of the first metal layer 22 is set to 1 mm.
[0042] In this embodiment, a first metal layer 22 with a thickness of 1 mm is provided for the outer shell of the battery, and the first metal layer 22 is disposed on the inner surface of the side wall 21 of the outer shell 2. When the temperature rises during the operation of the battery, the deformation amount of the side wall 21 is smaller than that of the first metal layer 22. The side wall 21 deforms inward, generating an inward binding force, which hinders the deformation of the outer shell 2 and the battery body 1.
[0043] In some embodiments, a battery is provided, including the above-mentioned outer shell 2 and battery body 1. The above-mentioned battery body 1 is disposed inside the above-mentioned outer shell 2.
[0044] In some embodiments, a battery device is provided, including the above-mentioned battery. Specifically, the battery device can be a battery module or a battery pack, etc.
[0045] In some embodiments, an electrical device is provided, including the above-mentioned battery device or the above-mentioned battery. Specifically, the above-mentioned battery device or the above-mentioned battery is used to supply power for the operation of the electrical device. Specifically, the electrical device can be an electric vehicle, an electric ship, an airplane, etc.
[0046] In summary, the utility model can inhibit the deformation of the battery, improve the battery life, continuously inhibit the battery swelling, and extend the service life of the battery. Moreover, the risk of battery failure is reduced. By adding the first metal layer 22 to the side wall 21, the wall thickness is increased, the structural strength is improved, and the safety is stronger. After assembly, it is convenient to directly replace the abnormal battery, the binding force interference can be excluded, and the maintainability is convenient. The assembly is flexible, compatible with the fixed-pressure binding assembly and the fixed-length assembly of the whole package, easy to be platformized, and has better versatility. And the addition of the first metal layer 22 will not be disadvantageous to improving the battery volume utilization rate. Although there is one more first metal layer 22 in the utility model than in the conventional battery, the thermal deformation of the battery is inhibited. On the premise that the deformation amount is controlled, compared with other inhibition schemes, the space utilization rate of this scheme is also higher.
[0047] By providing the first metal layer 22 with different coefficients of thermal expansion on the battery outer shell 2, taking advantage of the difference in the coefficients of thermal expansion between metals, arranging metal layers different from the side wall 21 alone or simultaneously inside and outside the shell, after the temperature of the side wall 21 rises, the new battery outer shell 2 can inhibit the increase of the internal stress of the battery and reach equilibrium with it, enabling the self-regulation of the deformation of the battery.
[0048] When the batteries are stacked into a battery device, the gap formed between two batteries due to the metal layer can directly serve as an air-cooling flow channel, eliminating the need to additionally increase an air-cooling plate, reducing costs and improving space utilization.
[0049] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.
[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0051] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0052] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0053] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0054] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A battery shell, wherein the interior of the shell is suitable for arranging a battery body, the shell comprises a side wall and a first metal layer connected to each other, the first metal layer and the side wall are both made of metal materials, and the thermal expansion coefficient of the first metal layer is different from the thermal expansion coefficient of the side wall.
2. The housing according to claim 1, characterized in that The first metal layer is disposed on the side wall surface.
3. The housing according to claim 1, characterized in that The housing includes two side walls that are arranged opposite to each other along a thickness direction, and both side walls are connected to the first metal layer.
4. The housing according to any one of claims 1 to 3, characterized in that: The first metal layer is bonded to the side wall or is an integral structure.
5. The housing according to any one of claims 1 to 3, characterized in that: The first metal layer is connected to the outer surface of the side wall, and the thermal expansion coefficient of the first metal layer is smaller than the thermal expansion coefficient of the side wall.
6. The housing according to any one of claims 1 to 3, characterized in that: The first metal layer is connected to the inner surface of the side wall, and the thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the side wall.
7. The housing according to any one of claims 1 to 3, characterized in that: The material of the side wall is one of metal aluminum, metal silver and metal tungsten, and the material of the first metal layer is metal copper 、 One of metallic iron and metallic gold.
8. The housing according to any one of claims 1 to 3, characterized in that: The material of the side wall is one of metal aluminum, metal iron and metal gold, and the material of the first metal layer is one of metal cadmium, metal tungsten and metal molybdenum.
9. The housing according to any one of claims 1 to 3, characterized in that: The thickness of the first metal layer is 0.2 mm-1 mm.
10. A battery, characterized in that: The invention comprises a shell and a battery body as described in any one of claims 1 to 9, wherein the battery body is arranged in the shell.
11. A battery device, characterized in that: Comprising the battery as claimed in claim 10.
12. An electrical device, characterized in that: Comprising the battery device according to claim 10, or the battery according to claim 11.