Battery shell, battery and electric equipment
By applying a reinforcement layer in the welding area of the battery case, the problem of low strength on the narrow surface of the weld side is solved, the structural strength of the welding area is improved, deformation and cracking are avoided, and the safety and stability of the battery case is ensured.
Patent Information
- Application Number
- CN202421388853.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-06-18
AI Technical Summary
Due to the influence of the strength of the weld, the overall strength of the narrow side of the weld side is lower than that of the narrow side of the non-weld side. It is easy to deform due to changes in the internal and external pressure difference during the battery helium inspection and vacuuming process, which seriously affects the appearance of the battery, and even causes the narrow side of the shell to rupture, causing safety accidents.
The reinforcement layer is coated in the welding area of the battery case to improve the bending strength, impact resistance and structural strength of the welding area, and avoid deformation due to changes in internal and external pressure difference.
By coating the reinforcement layer in the welding area, the structural strength of the welding area is effectively improved, deformation and cracking are avoided, and the safety and stability of the battery case are ensured.
Smart Images
Figure CN223023380U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery housing, a battery and an electrical equipment. Background Art
[0002] In the related art, an aluminum shell is formed by laser welding. The formed aluminum shell includes two large surfaces and two narrow surfaces. The weld seam is generally located on one of the narrow surfaces of the aluminum shell, and the narrow surface of the aluminum shell is divided into a weld seam side narrow surface and a non-weld seam side narrow surface according to whether there is a weld seam area.
[0003] However, the existing battery housing also has significant defects: due to the influence of the weld strength, the overall strength of the weld seam side narrow surface is generally lower than that of the non-weld seam side narrow surface, and the strength difference increases with the increase of the outer appearance thickness of the housing and the decrease of the wall thickness of the housing. After this difference reaches a certain level, during the helium leak detection and vacuum pumping process of the battery, the weld seam side narrow surface is likely to deform due to the change of the internal pressure difference in the housing, seriously affecting the appearance of the battery, and even causing the fatigue failure of the battery housing and the rupture of the narrow surface of the housing, leading to safety accidents. Summary of the Utility Model
[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery housing, which can effectively reduce the wall thickness of the main housing while enhancing the bending strength, impact resistance and structural strength of the main housing, thereby solving the deformation problem of the battery housing.
[0005] The utility model further provides a battery.
[0006] The utility model further provides an electrical equipment.
[0007] The battery housing according to the utility model is characterized by comprising: a main housing provided with a welding area; and a reinforcing layer coated on the welding area to enhance the structural strength of the welding area.
[0008] By coating a reinforcing layer on the welding area of the main housing according to the utility model, the bending strength, impact resistance and structural strength of the welding area can be enhanced, the deformation of the welding area due to the change of the internal and external pressure difference can be avoided, and in addition, the rupture of the welding area caused by the fatigue failure of the main housing can be avoided, thereby avoiding the occurrence of safety accidents.
[0009] In some examples of the utility model, the reinforcing layer is at least one of a polyurea coating and a polyphenylene sulfide coating.
[0010] In some examples of the utility model, the thickness of the reinforcing layer is a, and the thickness of the main housing is b. The relationship between a and b is: 0.05b ≤ a ≤ b.
[0011] In some examples of the present utility model, the main housing includes: a first narrow side plate and a second narrow side plate, the first narrow side plate and the second narrow side plate are arranged oppositely, the welding area is provided on the first narrow side plate, and the reinforcing layer is coated on the outer surface of the first narrow side plate.
[0012] In some examples of the present utility model, the reinforcing layer is coated on the outer surface of the second narrow side plate.
[0013] In some examples of the present utility model, the main housing further includes: a first wide side plate and a second wide side plate, the first wide side plate and the second wide side plate are arranged oppositely, the reinforcing layer is coated on the outer surface of the first wide side plate; and / or the reinforcing layer is coated on the outer surface of the second wide side plate.
[0014] In some examples of the present utility model, the reinforcing layer is coated on the inner surface of at least one of the first narrow side plate, the second narrow side plate, the first wide side plate, and the second wide side plate.
[0015] In some examples of the present utility model, the main housing is an aluminum structural member.
[0016] The battery according to the present utility model includes: the battery housing described above.
[0017] The electrical device according to the present utility model includes: the battery described above.
[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:
[0020] Figure 1 is a schematic structural view of a battery housing according to an embodiment of the present utility model;
[0021] Figure 2 is a partial schematic view of a battery housing according to an embodiment of the present utility model.
[0022] REFERENCE NUMERALS:
[0023] 1. Battery housing;
[0024] 10. Main housing; 100. Welding area; 101. First narrow side plate; 102. Second narrow side plate; 103. First wide side plate; 104. Second wide side plate; 20. Reinforcing layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present utility model will be described in detail below.
[0026] Next, reference will be made to Figure 1 and Figure 2 describe the battery housing 1 according to an embodiment of the present utility model.
[0027] As Figure 1 and Figure 2 shown, the battery housing 1 according to an embodiment of the present utility model includes: a main housing 10 and a reinforcing layer 20. The main housing 10 is the main part of the battery housing 1, which mainly can play the roles of protection, isolation, heat dissipation and electrical insulation. The reinforcing layer 20 mainly can play the role of reinforcement and can enhance the strength of the structure.
[0028] As Figure 1 and Figure 2 shown, the main housing 10 is provided with a welding area 100, and the reinforcing layer 20 is coated on the welding area 100 to enhance the structural strength of the welding area 100. The welding area 100 is the area where the main housing 10 is welded and formed. The reinforcing layer 20 is coated on the welding area 100, so that the structural strength of the welding area 100 can be enhanced, thereby the bending strength and impact resistance of the welding area 100 can be improved. When the internal pressure in the battery housing 1 is relatively large, deformation of the welding area 100 due to the change of the internal and external pressure difference can be avoided.
[0029] Thus, by coating the reinforcing layer 20 on the welding area 100 of the main housing 10, the bending strength, impact resistance and structural strength of the welding area 100 can be improved, deformation of the welding area 100 due to the change of the internal and external pressure difference can be avoided. In addition, rupture of the welding area 100 caused by fatigue failure of the main housing 10 can be avoided, thereby avoiding the occurrence of safety accidents.
[0030] Specifically, as Figure 1 and Figure 2 shown, the reinforcing layer 20 is at least one of a polyurea coating and a polyphenylene sulfide coating. That is to say, the reinforcing layer 20 can be a single polyurea coating or a polyphenylene sulfide coating, or a mixture of two different coatings of a polyurea coating and a polyphenylene sulfide coating. Both the polyurea coating and the polyphenylene sulfide coating can play the role of enhancing the structural strength. By coating the reinforcing layer 20 on the welding area 100, the bending strength, impact resistance and structural strength of the welding area 100 can be improved, deformation of the welding area 100 due to the change of the internal and external pressure difference can be avoided. In addition, rupture of the welding area 100 caused by fatigue failure of the main housing 10 can be avoided, thereby avoiding the occurrence of safety accidents.
[0031] Among them, as Figure 1 and Figure 2 As shown, the thickness of the reinforcement layer 20 is a, and the thickness of the main housing 10 is b. The relationship between a and b is: 0.05b ≤ a ≤ b. It should be noted that there needs to be a certain relationship between the thickness of the reinforcement layer 20 and the thickness of the main housing 10. Specifically, the thickness of the reinforcement layer 20 cannot be too small, that is, less than 0.05 times the thickness of the main housing 10. In this case, the thickness of the reinforcement layer 20 is too thin, which will affect the effect of the reinforcement layer 20 in enhancing the bending strength, impact resistance, and structural strength of the welding area 100. This will cause the welding area 100 to deform due to changes in the internal and external pressure difference. In addition, it may cause the welding area 100 to rupture due to the fatigue failure of the main housing 10, which may lead to safety accidents. At the same time, the thickness of the reinforcement layer 20 cannot be too large, that is, greater than the thickness of the main housing 10. In this case, the thickness of the reinforcement layer 20 is too thick. On the premise that the reinforcement layer 20 can enhance the bending strength, impact resistance, and structural strength of the welding area 100, the setting of the reinforcement layer 20 will be too thick, which will increase the cost and is not convenient for the setting of the reinforcement layer 20.
[0032] In addition, as Figure 1 and Figure 2 shown, the main housing 10 includes: a first narrow side plate 101 and a second narrow side plate 102. The first narrow side plate 101 and the second narrow side plate 102 are arranged oppositely. The first narrow side plate 101 is provided with a welding area 100, and the reinforcement layer 20 is coated on the outer surface of the first narrow side plate 101. The first narrow side plate 101 and the second narrow side plate 102 are components of the main housing 10. The first narrow side plate 101 and the second narrow side plate 102 are arranged oppositely. The first narrow side plate 101 is provided with a welding area 100. That is to say, the first narrow side plate 101 is provided with a welding area 100, while the second narrow side plate 102 is not provided with a welding area 100. The reinforcement layer 20 is coated on the outer surface of the first narrow side plate 101. That is to say, the reinforcement layer 20 is coated not only on the welding area 100 but also on the entire outer surface of the first narrow side plate 101. In this way, the reinforcement layer 20 can improve the overall bending strength, impact resistance, and structural strength of the first narrow side plate 101, avoid the deformation of the first narrow side plate 101 due to changes in the internal and external pressure difference, and in addition, can avoid the rupture of the first narrow side plate 101 due to the fatigue failure of the main housing 10, thereby avoiding safety accidents.
[0033] Of course, as Figure 1 and Figure 2As shown, the reinforcing layer 20 is coated on the outer surface of the second narrow side plate 102. Of course, the reinforcing layer 20 can also be coated on the entire outer surface of the second narrow side plate 102. In this way, the reinforcing layer 20 can improve the overall bending strength, impact resistance and structural strength of the second narrow side plate 102, prevent the second narrow side plate 102 from deforming due to the change of internal and external pressure difference, and in addition, prevent the second narrow side plate 102 from cracking due to the fatigue failure of the main housing 10, thus avoiding the occurrence of safety accidents.
[0034] Furthermore, as Figure 1 and Figure 2 shown, the main housing 10 further includes: a first wide side plate 103 and a second wide side plate 104, the first wide side plate 103 and the second wide side plate 104 are arranged opposite to each other, the reinforcing layer 20 is coated on the outer surface of the first wide side plate 103, and / or the reinforcing layer 20 is coated on the outer surface of the second wide side plate 104. The first wide side plate 103 and the second wide side plate 104 are the main components of the main housing 10. The first wide side plate 103 and the second wide side plate 104 are arranged opposite to each other, the reinforcing layer 20 is coated on the outer surface of the first wide side plate 103, and / or the reinforcing layer 20 is coated on the outer surface of the second wide side plate 104. Preferably, the reinforcing layer 20 is coated on the outer surface of the first wide side plate 103 and also on the outer surface of the second wide side plate 104. In this way, the bending strength, impact resistance and structural strength of the first wide side plate 103 and the second wide side plate 104 can be improved simultaneously, prevent the first wide side plate 103 and the second wide side plate 104 from deforming due to the change of internal and external pressure difference, and in addition, prevent the first wide side plate 103 and the second wide side plate 104 from cracking due to the fatigue failure of the main housing 10, thus avoiding the occurrence of safety accidents.
[0035] It should be noted that, as Figure 1 and Figure 2 shown, the reinforcing layer 20 is coated on the inner surface of at least one of the first narrow side plate 101, the second narrow side plate 102, the first wide side plate 103 and the second wide side plate 104. That is to say, the reinforcing layer 20 is coated on one or more inner surfaces of the first narrow side plate 101, the second narrow side plate 102, the first wide side plate 103 and the second wide side plate 104. It should be noted that when the reinforcing layer 20 is a polyurea coating or a polyphenylene sulfide coating, the reinforcing layer 20 also has an insulating effect. Thus, the reinforcing layer 20 can not only improve the structural strength of the first narrow side plate 101, the second narrow side plate 102, the first wide side plate 103 and the second wide side plate 104, but also play a certain insulating role between the battery cell and the main housing 10, thereby improving the safety of the battery.
[0036] In addition, as Figure 1As shown, the main housing 10 is an aluminum structural member. That is to say, the material for manufacturing the main housing 10 is metallic aluminum. Metallic aluminum has a relatively light weight, which can reduce the overall weight of the battery housing 1, facilitating the lightweight design of the battery. Moreover, metallic aluminum has good machining performance, excellent weldability, high specific strength, specific modulus, fracture toughness, fatigue strength, and corrosion resistance stability, which can improve the safety of the battery.
[0037] The battery according to an embodiment of the present invention includes the battery housing 1 described in the above embodiment.
[0038] The electrical equipment according to an embodiment of the present invention includes the battery described in the above embodiment.
[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "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. It is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention.
[0040] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. In the description of the present invention, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.
[0041] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
[0042] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A battery housing (1), characterized in that: include: A main shell (10), wherein the main shell (10) is provided with a welding area (100); A reinforcing layer (20), wherein the reinforcing layer (20) is coated on the welding area (100) to enhance the structural strength of the welding area (100).
2. The battery housing (1) according to claim 1, characterized in that: The reinforcement layer (20) is at least one of a polyurea coating and a polyphenylene sulfide coating.
3. The battery housing (1) according to claim 1, characterized in that: The thickness of the reinforcement layer (20) is a, the thickness of the main shell (10) is b, and the relationship between a and b is: 0.05b≤a≤b.
4. The battery housing (1) according to any one of claims 1 to 3, characterized in that: The main shell (10) comprises: a first narrow side plate (101) and a second narrow side plate (102), the first narrow side plate (101) and the second narrow side plate (102) being arranged opposite to each other, the first narrow side plate (101) being provided with the welding area (100), and the reinforcing layer (20) being coated on the outer surface of the first narrow side plate (101).
5. The battery housing (1) according to claim 4, characterized in that: The reinforcement layer (20) is coated on the outer surface of the second narrow side plate (102).
6. The battery housing (1) according to claim 5, characterized in that: The main shell (10) further comprises: a first wide side plate (103) and a second wide side plate (104), the first wide side plate (103) and the second wide side plate (104) being arranged opposite to each other, and the reinforcing layer (20) being coated on the outer surface of the first wide side plate (103); and / or The reinforcement layer (20) is coated on the outer surface of the second wide side plate (104).
7. The battery housing (1) according to claim 6, characterized in that: The reinforcing layer (20) is coated on the inner surface of at least one of the first narrow side panel (101), the second narrow side panel (102), the first wide side panel (103) and the second wide side panel (104).
8. The battery housing (1) according to claim 1, characterized in that: The main housing (10) is an aluminum structural component.
9. A battery, characterized in that: include: The battery housing (1) according to any one of claims 1 to 8.
10. An electrical device, characterized in that: include: The battery as claimed in claim 9.