Housing, cover assembly, battery and electric device
By incorporating an electromagnetic shielding layer within the battery casing and cover assembly, the adverse effects of interfering magnetic fields on electrical equipment during battery operation are resolved, resulting in better electromagnetic shielding and improved user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN HIGHPOWER TECH CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-17
Smart Images
Figure CN122418162A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery technology, and more particularly to a casing, cover assembly, battery, and electrical device. Background Technology
[0002] When a battery is working, the current flowing through the terminals creates an interfering magnetic field, which can negatively impact devices using that battery. For example, when a battery is used in Bluetooth headsets, this interfering magnetic field can cause audio signal noise, potentially interfering with the headset's internal circuitry or speaker operation, thus affecting the user experience. Summary of the Invention
[0003] This invention provides a housing, a cover assembly, a battery, and an electrical device, aiming to solve the problem that the interfering magnetic field generated by existing batteries during operation can easily have adverse effects on electrical devices using the batteries.
[0004] This invention provides a housing, including a housing wall and a first electromagnetic shielding layer; the housing wall encloses a receiving cavity for accommodating the battery core; the first electromagnetic shielding layer is encapsulated inside the housing wall.
[0005] Optionally, the shell wall includes a side wall and a bottom wall; the side wall is annular; the bottom wall is connected to one end of the side wall and closes the opening at one end of the side wall to form the receiving cavity; the first electromagnetic shielding layer includes a first shielding part, which is encapsulated in the side wall; and / or, the first electromagnetic shielding layer includes a second shielding part, which is encapsulated in the bottom wall.
[0006] Optionally, the sidewall has a first cavity, the bottom wall has a second cavity, and the first cavity and the second cavity are connected; the first shielding part is located in the first cavity, and the second shielding part is located in the second cavity; the first cavity and the first shielding part are annular and both surround the receiving cavity; the second shielding part is connected to the first shielding part and closes one end opening of the first shielding part.
[0007] Optionally, along the arrangement direction of the sidewall and the bottom wall, the end face of the sidewall facing away from the bottom wall is used for welding the cover plate assembly of the battery, and the distance between the end face of the sidewall facing away from the bottom wall and the first cavity is d, where 1mm≤d≤2mm; and / or, the first cavity and the second cavity are connected to form a closed space.
[0008] Optionally, the shell wall thickness is 'a', where 0.2 mm ≤ a ≤ 0.4 mm; and / or; the shell wall has a first wall located between the receiving cavity and the first electromagnetic shielding layer, the thickness of the first wall being 'c1', where 0.05 mm ≤ c1 ≤ 0.1 mm; and / or; the shell wall has a second wall located on the side of the first electromagnetic shielding layer opposite to the receiving cavity, the thickness of the second wall being 'c2', where 0.05 mm ≤ c2 ≤ 0.1 mm; and / or; the shell wall has a first wall and a second wall, the first wall located between the receiving cavity and the first electromagnetic shielding layer, the second wall located on the side of the first electromagnetic shielding layer opposite to the receiving cavity, the thickness of the first wall being equal to the thickness of the second wall; and / or, the thickness of the first electromagnetic shielding layer is 'b', where 0.05 mm ≤ b ≤ 0.1 mm; and / or, the shell wall is a metal wall.
[0009] Optionally, the shell wall has a first installation space for accommodating the first electromagnetic shielding layer, and the shell further includes a first heat insulation layer, which is disposed in the first installation space and covers the first electromagnetic shielding layer; wherein the first heat insulation layer completely covers the first electromagnetic shielding layer.
[0010] This invention also provides a cover plate assembly, including a cover plate unit and a second electromagnetic shielding layer; the cover plate unit is used to close the opening of the battery casing; the second electromagnetic shielding layer is encapsulated within the cover plate unit.
[0011] Optionally, the cover plate unit includes a cover plate and a pole post; the cover plate is provided with a clearance hole, which penetrates the cover plate along its thickness direction; the pole post is connected to the cover plate and closes the clearance hole; the second electromagnetic shielding layer includes a third shielding part, which is encapsulated within the cover plate; the second electromagnetic shielding layer includes a fourth shielding part, which is encapsulated within the pole post.
[0012] Optionally, the pole includes a connecting plate and a connecting post; the connecting plate is connected to the cover plate and closes the clearance hole; the connecting post is connected to the connecting plate and extends into the clearance hole; the fourth shielding part is encapsulated inside the connecting plate.
[0013] Optionally, the thickness of the connecting plate is h, wherein 0.05mm≤h≤0.1mm.
[0014] Optionally, the third shielding portion is an annular structure and surrounds the clearance hole; and / or, the third shielding portion forms a central hole around the clearance hole; the fourth shielding portion includes an inner region relative to the central hole and an outer region relative to the third shielding portion, the outer region surrounding and connected to the inner region; and / or, the thickness of the cover plate is f, where 0.2mm ≤ f ≤ 0.4mm; and / or, the cover plate has a third cavity accommodating the third shielding portion, the area between the outer surface of the cover plate and the third cavity is a welding portion, the welding portion surrounding the third cavity and used for welding to the outer shell. The width of the welded portion is g, wherein 0.5mm ≤ g ≤ 1mm; and / or, the cover plate has a third cavity accommodating the third shielding portion, the cover plate assembly further includes a second heat insulation layer, the second heat insulation layer being located within the third cavity and covering the outside of the third shielding portion, wherein the second heat insulation layer completely covers the third shielding portion; and / or, the pole has a fourth cavity accommodating the fourth shielding portion, the cover plate assembly further includes a third heat insulation layer, the third heat insulation layer being located within the fourth cavity and covering the outside of the fourth shielding portion, wherein the third heat insulation layer completely covers the fourth shielding portion.
[0015] This invention also provides a battery, including an electrode core, a casing, and a cover assembly; the electrode core is installed inside the casing; the cover assembly closes the opening of the casing; the casing is as described in any of the preceding claims, and / or the cover assembly is as described in any of the preceding claims.
[0016] Optionally, the electrode core includes an electrode unit, which is composed of a positive electrode plate, a negative electrode plate, and a separator; along the direction from the outer shell to the cover plate assembly, the first electromagnetic shielding layer of the outer shell protrudes from the electrode unit.
[0017] This invention also provides an electrical device including any of the batteries described above.
[0018] The housing, cover assembly, battery, and electrical equipment provided in the embodiments of the present invention improve their electromagnetic shielding performance by providing a corresponding electromagnetic shielding layer inside the housing and / or cover assembly, thereby reducing the adverse effects of the interfering magnetic field generated by the electrode core on the electrical equipment using the battery. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of the outer shell provided in an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of region M in the middle; Figure 3 This is a schematic diagram of the shell wall provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the first electromagnetic shielding layer provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the cooperation between the first electromagnetic shielding layer and the first heat insulation layer provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of a cover plate assembly provided in an embodiment of the present invention; Figure 7 yes Figure 6 Enlarged view of region N in the middle; Figure 8 This is a schematic diagram of a cover plate unit provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of a battery provided in an embodiment of the present invention.
[0021] Instruction manual illustrations and reference numerals: 100. Battery; 10. Outer casing; 1. Shell wall; 11. Receiving cavity; 12. First installation space; 13. Side wall; 131. First cavity; 14. Bottom wall; 141. Second cavity; 15. First wall; 16. Second wall; 2. First electromagnetic shielding layer; 21. First shielding part; 22. Second shielding part; 3. First insulation layer; 20. Cover plate assembly; 4. Cover plate unit; 41. Second mounting space; 411. Third cavity; 412. Fourth cavity; 42. Cover plate; 421. Clearance hole; 43. Pole post; 431. Connecting plate; 432. Connecting post; 5. Second electromagnetic shielding layer; 51. Third shielding section; 52. Fourth shielding section; 6. Insulating components; 7. Second insulation layer; 8. Third insulation layer; 30. Electrode core; 301. Electrode unit; 302. First electrode tab; 303. Second electrode tab. Detailed Implementation
[0022] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0023] In the description of this invention, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0025] like Figure 1 , Figure 2 as well as Figure 9 As shown, an embodiment of the present invention provides a housing 10 for accommodating the electrode core 30 and electrolyte of a battery 100. The housing 10 includes a housing wall 1 and a first electromagnetic shielding layer 2; the housing wall 1 encloses a receiving cavity 11 for accommodating the electrode core 30 of the battery 100; the first electromagnetic shielding layer 2 is encapsulated inside the housing wall 1.
[0026] The shell wall 1 has an inner surface and an outer surface, wherein the inner surface of the shell wall 1 encloses a receiving cavity 11 for receiving the electrode core 30 and the electrolyte. "The first electromagnetic shielding layer 2 is encapsulated inside the shell wall 1" means that the first electromagnetic shielding layer 2 is located between the inner surface and the outer surface of the shell wall 1.
[0027] In this embodiment, by providing a first electromagnetic shielding layer 2 inside the shell wall 1 of the outer shell 10, the electromagnetic shielding performance of the outer shell 10 can be improved. That is, by providing the first electromagnetic shielding layer 2, the electromagnetic shielding effect of the outer shell 10 on the electrode core 30 inside the receiving cavity 11 can be improved, effectively preventing the interference magnetic field generated by the electrode core 30 from being transmitted out of the outer shell 10, thereby reducing the adverse effects of the interference magnetic field generated by the electrode core 30 on the electrical equipment using the battery 100.
[0028] In addition, encapsulating the first electromagnetic shielding layer 2 inside the shell wall 1 can effectively prevent the first electromagnetic shielding layer 2 from being exposed, thereby preventing it from being damaged by scratches from external objects.
[0029] It should be understood that the configuration in this embodiment is equivalent to adding a first electromagnetic shielding layer 2 inside the existing battery casing to improve the electromagnetic shielding effect of the casing 10.
[0030] Furthermore, the shell wall 1 is a metal wall, meaning that the material of the shell wall 1 is metal, such as steel. The material of the first electromagnetic shielding layer 2 can be molybdenum disulfide nanoparticles, graphene, or high-purity titanium, etc.
[0031] Furthermore, the electromagnetic shielding performance of the material of the first electromagnetic shielding layer 2 (defined as material A) is superior to that of the material of the shell wall 1 (defined as material B). That is, under the same conditions, the electromagnetic shielding effect of an object made of material A is superior to that of an object made of material B.
[0032] It should be understood that the shell wall 1 has a first mounting space 12 for accommodating the first electromagnetic shielding layer 2 (see reference). Figure 3 The first mounting space 12 is located between the inner surface and the outer surface of the shell wall 1. In the prior art, the first mounting space 12 and the first electromagnetic shielding layer 2 are not provided inside the shell wall 1. That is, in the prior art, the material of the object A filled in the first mounting space 12 of the shell wall 1 is the same as the material of the shell wall 1.
[0033] like Figure 3 and Figure 4 As shown, in one embodiment, the shell wall 1 includes a side wall 13 and a bottom wall 14; the side wall 13 is annular; the bottom wall 14 is connected to one end of the side wall 13 and closes the opening at one end of the side wall 13 to form a receiving cavity 11; the first electromagnetic shielding layer 2 includes a first shielding part 21, which is encapsulated in the side wall 13; and / or, the first electromagnetic shielding layer 2 includes a second shielding part 22, which is encapsulated in the bottom wall 14.
[0034] During production, a portion of the first electromagnetic shielding layer 2 can be provided in both the side wall 13 and the bottom wall 14 to further improve the electromagnetic shielding effect of the outer casing 10.
[0035] The sidewall 13 can be a circular ring, a square ring, or a ring structure of other shapes. The bottom wall 14 can be a flat plate structure.
[0036] like Figure 3 and Figure 4As shown, in one embodiment, the sidewall 13 has a first cavity 131, and the bottom wall 14 has a second cavity 141, which are connected. A first shielding part 21 is located within the first cavity 131, and a second shielding part 22 is located within the second cavity 141. The first cavity 131 and the first shielding part 21 are annular and both surround the receiving cavity 11. The second shielding part 22 is connected to the first shielding part 21 and closes one end opening of the first shielding part 21. This can further improve the electromagnetic shielding effect of the outer shell 10.
[0037] The first cavity 131 and the second cavity 141 are connected to form the first installation space 12 mentioned above.
[0038] Furthermore, the first cavity 131 forms a first opening on the surface of the side wall 13 near the bottom wall 14, and the first opening surrounds the receiving cavity 11; the second cavity 141 forms a second opening on the surface of the bottom wall 14 near the side wall 13, and the second opening surrounds the receiving cavity 11; the first cavity 131 and the second cavity 141 are connected through the first opening and the second opening, and the first shielding part 21 is exposed from the first opening, and the second shielding part 22 is exposed from the second opening, and the second shielding part 22 can close the opening of the first shielding part 21 from the first opening.
[0039] In one embodiment, the first shielding portion 21 may be a circular ring, a square ring, or a ring structure of other shapes. The first cavity 131 may be a circular ring, a square ring, or a ring structure of other shapes.
[0040] The cross-sectional shapes of the first shielding part 21, the first cavity 131, and the side wall 13 can be the same.
[0041] In one embodiment, the first cavity 131 and the second cavity 141 are connected to form a closed space, that is, the first mounting space 12 is a closed space. In this case, the first mounting space 12 is not connected to the outer surface space of the shell wall 1, nor to the receiving cavity 11. This can effectively prevent the first electromagnetic shielding layer 2 from being exposed, thereby preventing it from being damaged by scratches from foreign objects.
[0042] During production, the first electromagnetic shielding layer 2 can be encapsulated inside the shell wall 1 by casting.
[0043] like Figure 3 As shown, in one embodiment, along the arrangement direction of the sidewall 13 and the bottom wall 14, the end face of the sidewall 13 facing away from the bottom wall 14 is used to weld the cover plate assembly 20 of the battery 100, and the distance between the end face of the sidewall 13 facing away from the bottom wall 14 and the first cavity 131 is d, where 1mm≤d≤2mm.
[0044] This configuration ensures the electromagnetic shielding effect of the first electromagnetic shielding layer 2 on the pole core 30 inside the cavity 11, while also preventing the electromagnetic shielding layer inside the first cavity 131 from being damaged by the high temperature during welding.
[0045] In addition, the value of d can be 1mm, 1.2mm, 1.5mm, 1.8mm or 2mm.
[0046] In addition, the end face of the side wall 13 away from the bottom wall 14 is the top surface of the side wall 13. The top surface can be a plane, and the bottom surface of the first cavity 131 can also be a plane. The top surface of the side wall 13 and the bottom surface of the first cavity 131 can be parallel. The distance between the end face of the side wall 13 away from the bottom wall and the first cavity 131 is the distance between the top surface of the side wall 13 and the bottom surface of the first cavity 131.
[0047] Of course, in other embodiments, the top surface of the sidewall 13 and the bottom surface of the first cavity 131 can also be surfaces of other shapes. In this case, the distance d between them can refer to the minimum distance, maximum distance or average distance between them.
[0048] like Figure 3 As shown, in one embodiment, the thickness of the shell wall 1 is 'a', where 0.2 mm ≤ a ≤ 0.4 mm. This ensures the strength of the shell wall 1 while preventing the shell wall 1 from being too large, which would result in an excessively low energy density of the battery 100. The thickness of the shell wall 1 is the distance between the inner surface and the outer surface of the shell wall 1.
[0049] In this case, the thickness of each region of the shell wall 1 is the same, and is a; or, the thickness of some regions of the shell wall 1 is different. In this case, the thickness of the shell wall 1 can refer to the maximum thickness, minimum thickness, or average thickness of the shell wall 1.
[0050] In addition, the thickness of shell wall 1 being a also means that the thickness of bottom wall 14 and side wall 13 is also a.
[0051] In addition, the value of 'a' can be 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm.
[0052] like Figure 3 As shown, in one embodiment, the shell wall 1 has a first wall 15, which is located between the receiving cavity 11 and the first electromagnetic shielding layer 2. The thickness of the first wall 15 is c1, wherein 0.05mm≤c1≤0.1mm.
[0053] The first wall 15 includes the region of the side wall 13 located between the first cavity 131 and the receiving cavity 11 (defined as the first region), and the first wall 15 also includes the region of the bottom wall 14 located between the second cavity 141 and the receiving cavity 11 (defined as the second region). This arrangement can ensure the strength of the shell wall 1, and also avoid the shell wall 1 being too large, which would result in an excessively low energy density of the battery 100.
[0054] The thickness of the first region and the thickness of the second region can be the same, both being c1. Furthermore, the thickness of the first region refers to the distance between the first cavity 131 and the receiving cavity 11, and the thickness of the second region refers to the distance between the second cavity 141 and the receiving cavity 11.
[0055] In addition, the thickness of each region in the first region is the same and is c1; or, some regions in the first region have different thicknesses. In this case, the thickness of the first region can refer to the maximum thickness, minimum thickness, or average thickness of the first region.
[0056] The thickness of each region in the second region is the same, and is c1; or, some regions in the second region have different thicknesses. In this case, the thickness of the second region can refer to the maximum thickness, minimum thickness, or average thickness of the second region.
[0057] In addition, the value of c1 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm.
[0058] like Figure 3 As shown, in one embodiment, the shell wall 1 has a second wall 16, which is located on the side of the first electromagnetic shielding layer 2 away from the receiving cavity 11. The thickness of the second wall 16 is c2, wherein 0.05mm≤c2≤0.1mm.
[0059] The second wall 16 includes the portion of the side wall 13 located on the side of the first cavity 131 opposite to the receiving cavity 11 (defined as the third region), and the second wall 16 also includes the portion of the bottom wall 14 located on the side of the second cavity 141 opposite to the receiving cavity 11 (defined as the fourth region). This arrangement ensures the strength of the shell wall 1 and avoids the shell wall 1 being too large, which would result in an excessively low energy density of the battery 100.
[0060] The thickness of the third region and the thickness of the fourth region can be the same, both being c2. In addition, the thickness of the third region refers to the distance between the outer surface of the first cavity 131 and the side wall 13 (i.e., the surface of the side wall 13 facing away from the receiving cavity 11), and the thickness of the fourth region refers to the distance between the second cavity 141 and the bottom surface of the bottom wall 14 (i.e., the surface of the bottom wall 14 facing away from the receiving cavity 11).
[0061] In addition, the thickness of each region in the third region is the same, and all are c2; or, some regions in the third region have different thicknesses. In this case, the thickness of the third region can refer to the maximum thickness, minimum thickness, or average thickness of the third region.
[0062] The thickness of each region in the fourth region is the same, and is c2; or, some regions in the fourth region have different thicknesses. In this case, the thickness of the fourth region can refer to the maximum thickness, minimum thickness, or average thickness of the fourth region.
[0063] In addition, the value of c2 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm.
[0064] In one embodiment, c1 = c2, which facilitates production and preparation.
[0065] like Figure 2 and Figure 5 As shown, in one embodiment, the outer casing 10 further includes a first heat insulation layer 3, which is encapsulated within the casing wall 1 and covers the outside of the first electromagnetic shielding layer 2. The first heat insulation layer 3 prevents heat damage to the first electromagnetic shielding layer 2 during operations such as welding the casing wall 1.
[0066] The first heat insulation layer 3 is disposed within the first installation space 12, and the material of the first heat insulation layer 3 can be titanium alloy or niobium-based high-temperature alloy, etc.
[0067] In one embodiment, the first heat insulation layer 3 completely covers the first electromagnetic shielding layer 2, which can improve the protection effect of the first electromagnetic shielding layer 2.
[0068] The shell wall 1, the first electromagnetic shielding layer 2, and the first heat insulation layer 3 are integrally cast. During production, the first heat insulation layer 3 is first wrapped around the first electromagnetic shielding layer 2, and then it is placed in the corresponding mold by casting, and molten metal (such as molten steel) is poured in. After the molten metal solidifies, the shell wall 1 is formed.
[0069] like Figure 6 As shown, this embodiment of the invention also provides a cover plate assembly 20, which includes a cover plate unit 4 and a second electromagnetic shielding layer 5; the cover plate unit 4 is used to close the opening of the outer casing 10 of the battery 100; the second electromagnetic shielding layer 5 is encapsulated within the cover plate unit 4.
[0070] In this embodiment, by providing a second electromagnetic shielding layer 5 within the cover unit 4 of the cover assembly 20, the electromagnetic shielding performance of the cover assembly 20 can be improved. That is, by providing the second electromagnetic shielding layer 5, the electromagnetic shielding effect of the cover assembly 20 on the electrode core 30 within the outer casing 10 can be improved, effectively preventing the interference magnetic field generated by the electrode core 30 from being transmitted from the cover assembly 20, thereby reducing the adverse effects of the interference magnetic field generated by the electrode core 30 on electrical devices using the battery 100.
[0071] In addition, the casing 10 of the battery 100 mentioned herein may be the casing 10 described in any of the above embodiments, or it may be a casing in other prior art.
[0072] like Figure 8 As shown, the cover plate unit 4 has a second mounting space 41, and the second electromagnetic shielding layer 5 is located within the second mounting space 41. The second mounting space 41 is an enclosed space, allowing the cover plate assembly 20 to completely cover the second electromagnetic shielding layer 5, thereby protecting it and effectively preventing damage from external objects.
[0073] like Figure 6 and Figure 8 As shown, in one embodiment, the cover plate unit 4 includes a cover plate 42 and a pole post 43; the cover plate 42 is provided with a clearance hole 421, which penetrates the cover plate 42 along the thickness direction of the cover plate 42; the pole post 43 is connected to the cover plate 42 and closes the clearance hole 421; the second electromagnetic shielding layer 5 includes a third shielding part 51, which is encapsulated in the cover plate 42; the second electromagnetic shielding layer 5 includes a fourth shielding part 52, which is encapsulated in the pole post 43.
[0074] Encapsulating the third shielding part 51 within the cover plate 42 can improve the shielding effect of the cover plate 42 on the interference magnetic field of the pole core 30. Similarly, placing the fourth shielding part 52 within the pole post 43 can improve the shielding effect of the pole post 43 on the interference magnetic field of the pole core 30.
[0075] At this time, the second installation space 41 includes a third cavity 411 and a fourth cavity 412, wherein the third cavity 411 is located inside the cover plate 42, the fourth cavity 412 is located inside the pole post 43, the third shielding part 51 is located inside the third cavity 411, and the fourth shielding part 52 is located inside the fourth cavity 412.
[0076] In addition, both the third cavity 411 and the fourth cavity 412 can be closed cavities.
[0077] like Figure 8As shown, in one embodiment, the pole post 43 includes a connecting plate 431 and a connecting post 432; the connecting plate 431 is connected to the cover plate 42 and closes the clearance hole 421; the connecting post 432 is connected to the end of the connecting plate 431 near the cover plate 42 and extends into the clearance hole 421; the fourth shielding part 52 is encapsulated in the connecting plate 431.
[0078] This arrangement allows for more space on the pole post 43 to install the fourth shielding part 52, thus enabling a larger fourth shielding part 52 to be installed inside the pole post 43, thereby improving the electromagnetic shielding effect of the pole post 43.
[0079] In one embodiment, both the cover plate 42 and the pole post 43 are metal parts. For example, the cover plate 42 can be a steel plate and the pole post 43 can be an aluminum pole post.
[0080] At this time, both the cover plate 42 and the pole post 43 also have a certain electromagnetic shielding effect.
[0081] Among them, the electromagnetic shielding performance of the material of the third shielding part 51 (defined as material C) is better than that of the material of the cover plate 42 (defined as material D). That is, under the same conditions, the electromagnetic shielding effect of the object made of material C is better than that of the object made of material D.
[0082] Furthermore, the electromagnetic shielding performance of the material of the fourth shielding part 52 (defined as material E) is superior to that of the material of the pole 43 (defined as material F). That is, under the same conditions, the electromagnetic shielding effect of an object made of material E is superior to that of an object made of material F.
[0083] refer to Figure 6 and Figure 7 At this time, the cover plate assembly 20 also has an insulating element 6, which is disposed between the pole post 43 and the cover plate 42 so as to insulate the pole post 43 and the cover plate 42.
[0084] In one embodiment, the insulating element 6 is disposed on the connecting plate 431 and surrounds the connecting post 432. After assembly, the insulating element 6 is located between the connecting plate 431 and the cover plate 42, with the cover plate 42, the insulating element 6, and the connecting plate 431 arranged sequentially along the thickness direction of the cover plate 42. At this time, the pole post 43 is spaced apart from the wall of the clearance hole 421, thereby achieving insulation between the two.
[0085] Alternatively, the insulating component 6 can be formed by curing insulating adhesive, and the connecting plate 431 is bonded to the cover plate 42 through the insulating component 6.
[0086] In one embodiment, both the connecting post 432 and the connecting plate 431 are cylindrical structures and can be coaxially arranged. The diameter of the connecting plate 431 is larger than the diameter of the connecting post 432. Alternatively, the clearance hole 421 can also be a circular hole, with a diameter larger than the diameter of the connecting post 432 and smaller than the diameter of the connecting plate 431.
[0087] like Figure 6 As shown, in one embodiment, the thickness of the connecting plate 431 is h, where 0.05mm ≤ h ≤ 0.1mm. This ensures the strength of the pole post 43, provides sufficient space for the connecting plate 431 to accommodate the second electromagnetic shielding layer 5, and avoids excessive thickness that could interfere with the installation of the pole core 30 within the housing 10.
[0088] The thickness direction of the cover plate 42 is consistent with the thickness direction of the connecting plate 431.
[0089] In addition, the value of h can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm.
[0090] In one embodiment, the third shielding part 51 is a ring structure and surrounds the clearance hole 421. This can improve the shielding effect of the third shielding part 51 on the interfering magnetic field.
[0091] At this time, the third cavity 411 is also annular and surrounds the clearance hole 421.
[0092] In one embodiment, when the third shielding part 51 is an annular structure, the third shielding part 51 forms a central hole around the clearance hole 421; the fourth shielding part 52 includes an inner region relative to the central hole and an outer region relative to the third shielding part 51, with the outer region surrounding and connected to the inner region.
[0093] The phrase "the inner region is opposite to the central hole" can mean that, in the orthographic projection of a plane perpendicular to the axis of the central hole, the projection of the inner region coincides with the projection of the central hole.
[0094] For example, the inner region is a cylindrical region, the central hole is a circular hole, the inner region and the central hole are coaxial, and the diameter of the inner region is equal to the diameter of the central hole.
[0095] The outer region being opposite to the third shielding part 51 can mean that, in an orthographic projection onto a plane perpendicular to the axis of the central hole, at least a portion of the projection of the outer region and the projection of the third shielding part 51 coincide.
[0096] For example, both the outer region and the third shielding part 51 are annular in shape. In this case, they are coaxial, and the inner diameter of the outer region (that is, the diameter of the inner region) is equal to the inner diameter of the third shielding part 51 (that is, the diameter of the central hole), while the outer diameter of the outer region is less than or equal to the outer diameter of the third shielding part 51.
[0097] like Figure 6 As shown, in one embodiment, the thickness of the cover plate 42 is f, where 0.2mm ≤ f ≤ 0.4mm. This setting ensures the strength of the cover plate 42 while preventing the cover plate 42 from becoming too large, which would reduce the energy density of the battery 100.
[0098] In addition, the value of f can be 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm.
[0099] like Figure 8 As shown, in one embodiment, the area between the outer side of the cover plate 42 and the third cavity 411 is a welding portion. The welding portion is used to weld to the outer shell 10. The welding portion surrounds the third cavity 411, and the width of the welding portion is g, where 0.5mm≤g≤1mm. This allows the cover plate 42 to have a sufficiently large space to accommodate the larger third shielding portion 51, while also preventing the high temperature during welding from damaging the third shielding portion 51.
[0100] In addition, the value of h can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.
[0101] The outer surface of the cover plate 42 refers to the surface of the cover plate 42 that is opposite to the clearance hole 421 in the radial direction of the clearance hole 421.
[0102] In one embodiment, the thickness of the third shielding part 51 may be equal to the thickness of the fourth shielding part 52, and the thickness of both may be equal to the thickness of the first electromagnetic shielding layer 2.
[0103] like Figure 7 As shown, in one embodiment, the cover plate assembly 20 further includes a second heat insulation layer 7, which is located inside the third cavity 411 and covers the outside of the third shielding portion 51.
[0104] The second heat insulation layer 7 can prevent heat damage to the third shielding part 51 during operations such as welding the cover plate 42.
[0105] The second heat insulation layer 7 is located inside the third cavity 411, and the material of the second heat insulation layer 7 can be titanium alloy or niobium-based high-temperature alloy, etc., and its material can be the same as that of the first heat insulation layer 3.
[0106] In one embodiment, the second heat insulation layer 7 completely covers the third shielding part 51, which can improve the protection effect of the third shielding part 51.
[0107] like Figure 8 As shown, in one embodiment, the cover plate assembly 20 further includes a third heat insulation layer 8, which is located within the fourth cavity 412 and covers the fourth shielding portion 52. The third heat insulation layer 8 prevents heat damage to the fourth shielding portion 52 during operations such as welding the cover plate 42.
[0108] The third heat insulation layer 8 is located inside the fourth cavity 412, and the material of the third heat insulation layer 8 can be titanium alloy or niobium-based high-temperature alloy, etc., and its material can be the same as that of the first heat insulation layer 3.
[0109] In one embodiment, the third heat insulation layer 8 completely covers the fourth shielding part 52, which can improve the protection effect of the fourth shielding part 52.
[0110] In actual production, the materials of the first electromagnetic shielding layer 2, the third shielding part 51, and the fourth shielding part 52 can be the same, which can reduce the types of materials and facilitate production.
[0111] Similarly, the first insulation layer 3, the second insulation layer 7, and the third insulation layer 8 can be made of the same material, which can reduce the types of materials and facilitate production.
[0112] In addition, in actual products, the space inside the first heat insulation layer 3 can be completely filled by the first electromagnetic shielding layer 2, and the two together form the first electromagnetic shielding unit. At the same time, the first installation space 12 can be completely filled by the first electromagnetic shielding unit.
[0113] The space within the second heat insulation layer 7 can be completely filled by the third shielding part 51, and the two together form the second electromagnetic shielding unit. At the same time, the third cavity 411 can be completely filled by the second electromagnetic shielding unit.
[0114] The space within the third heat insulation layer 8 can be completely filled by the fourth shielding part 52, and the two together form the third electromagnetic shielding unit. At the same time, the fourth cavity 412 can be completely filled by the third electromagnetic shielding unit.
[0115] In addition, the way in which the third shielding part 51 and the cover plate 42 are made together, the way in which the fourth shielding part 52 and the pole post 43 are made together, and the way in which the first electromagnetic shielding layer 2 and the shell wall 1 are made together can be the same.
[0116] The thickness of both the third shielding part 51 and the fourth shielding part 52 is equal to the thickness of the first electromagnetic shielding layer 2, and both the third shielding part 51 and the fourth shielding part 52 can be flat plate structures.
[0117] like Figure 9 As shown, this embodiment of the invention also provides a battery 100, which includes an electrode core 30, a housing 10, and a cover assembly 20; the electrode core 30 is installed inside the housing 10; the cover assembly 20 closes the opening of the housing 10; wherein, the housing 10 is the housing 10 described in any of the above embodiments, and / or, the cover assembly 20 is the cover assembly 20 described in any of the above embodiments.
[0118] This configuration can effectively prevent the interfering magnetic field generated by the core 30 from interfering with related components outside the battery 100.
[0119] The electrode core 30 is disposed within the outer casing 10, which mainly refers to the electrode core 30 being disposed within the receiving cavity 11. The cover plate assembly 20 closes the opening of the outer casing 10, which mainly refers to the cover plate assembly 20 closing the opening of the receiving cavity 11.
[0120] Furthermore, it should be understood that when the battery 100 uses the casing 10 described in any of the above embodiments, even if the battery 100 uses a cover assembly in the prior art, the interfering magnetic field generated by the electrode core 30 can effectively interfere with related devices outside the battery 100. Similarly, when the battery 100 uses the cover assembly 20 described in any of the above embodiments, even if the battery 100 uses a casing in the prior art, the interfering magnetic field generated by the electrode core 30 can effectively interfere with related devices outside the battery 100.
[0121] like Figure 9 As shown, in one embodiment, the electrode core 30 includes an electrode unit 301, which is composed of a positive electrode plate, a negative electrode plate, and a separator; along the direction from the outer shell 10 to the cover plate assembly 20 (this direction is parallel to the Z-axis), the first electromagnetic shielding layer 2 of the outer shell 10 protrudes from the electrode unit 301. This can further improve the shielding effect of the first electromagnetic shielding layer 2 on the interfering magnetic field generated by the electrode core 30.
[0122] In particular, the first electromagnetic shielding layer 2 of the outer shell 10 protruding from the electrode unit 301 along the direction from the outer shell 10 to the cover plate assembly 20 mainly refers to the first shielding part 21 protruding from the electrode unit 301 along the direction from the outer shell 10 to the cover plate assembly 20.
[0123] In addition, the height of the first shielding part 21 is greater than the height of the electrode unit 301 in the axial direction of the receiving cavity 11 (which is parallel to the Z-axis).
[0124] In one embodiment, the electrode core 30 is a wound core, that is, the electrode unit 301 is formed by winding a positive electrode sheet, a negative electrode sheet, and a separator. The number of separators in the electrode core 30 can be two layers, with one separator located between the positive electrode sheet and the negative electrode sheet. If the negative electrode sheet is located inside the winding structure when winding begins, the other separator covers the side of the negative electrode sheet away from the positive electrode sheet; if the positive electrode sheet is located inside the winding structure when winding begins, the other separator covers the side of the positive electrode sheet away from the negative electrode sheet.
[0125] Of course, the number of separators in the core 30 can be three. In this case, one separator is located on the side of the positive electrode away from the negative electrode, one separator is located between the positive electrode and the negative electrode, and one separator is located on the side of the negative electrode away from the positive electrode.
[0126] The electrode core 30 can also be a stacked core. In this case, the electrode unit 301 is made by stacking a positive electrode, a separator, and a negative electrode in sequence.
[0127] The configuration of the core 30 can be an existing design, and this application will not make any further restrictions here.
[0128] In addition, the electrode core 30 also has a first electrode tab 302 and a second electrode tab 303, both of which are electrically connected to the electrode unit 301. The first electrode tab 302 is electrically connected to the outer shell 1, and the second electrode tab 303 is electrically connected to the electrode post 43.
[0129] One of the first tab 302 and the second tab 303 is a positive tab, and the other is a negative tab. The positive tab is electrically connected to the positive electrode plate, and the negative tab is electrically connected to the negative electrode plate. Specifically, the first tab 302 can be electrically connected to the bottom wall 14, and the second tab 303 can be electrically connected to the connecting plate 431.
[0130] This invention also provides an electrical device that includes the battery 100 described in any of the above embodiments. The electrical device can be any known device that requires battery power, such as Bluetooth headsets, hearing aids, mobile phones, computers, wearable devices, aircraft, energy storage devices, power tools, and vehicles.
[0131] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0132] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.
Claims
1. A casing, characterized in that, Including the shell wall and the first electromagnetic shielding layer; The shell wall encloses a cavity to accommodate the battery's electrode core. The first electromagnetic shielding layer is encapsulated inside the shell wall.
2. The outer casing according to claim 1, wherein the casing wall comprises a side wall and a bottom wall; The sidewall is annular; The bottom wall is connected to one end of the side wall and closes the opening at one end of the side wall, forming the receiving cavity; The first electromagnetic shielding layer includes a first shielding portion, which is encapsulated within the side wall; and / or, the first electromagnetic shielding layer includes a second shielding portion, which is encapsulated within the bottom wall.
3. The outer casing according to claim 2, characterized in that, The side wall has a first cavity, and the bottom wall has a second cavity, and the first cavity and the second cavity are connected. The first shielding part is located inside the first cavity, and the second shielding part is located inside the second cavity; The first cavity and the first shielding part are annular and both surround the receiving cavity; The second shielding part is connected to the first shielding part and closes one end opening of the first shielding part.
4. The outer casing according to claim 3, characterized in that, Along the arrangement direction of the sidewalls and the bottom wall, the end face of the sidewall facing away from the bottom wall is used for welding the battery cover assembly, and the distance between the end face of the sidewall facing away from the bottom wall and the first cavity is d, where 1mm ≤ d ≤ 2mm; and / or, The first cavity and the second cavity are connected to form a closed space.
5. The outer casing according to claim 1, characterized in that, The thickness of the shell wall is a, wherein 0.2 mm ≤ a ≤ 0.4 mm; and / or; The shell wall has a first wall located between the receiving cavity and the first electromagnetic shielding layer, the thickness of the first wall being c1, wherein 0.05mm ≤ c1 ≤ 0.1mm; and / or; The shell wall has a second wall located on the side of the first electromagnetic shielding layer opposite to the receiving cavity, and the thickness of the second wall is c2, wherein 0.05mm≤c2≤0.1mm; and / or; The shell wall has a first wall and a second wall, the first wall being located between the receiving cavity and the first electromagnetic shielding layer, and the second wall being located on the side of the first electromagnetic shielding layer facing away from the receiving cavity; the thickness of the first wall is equal to the thickness of the second wall; and / or, The thickness of the first electromagnetic shielding layer is b, where 0.05 mm ≤ b ≤ 0.1 mm; and / or, The shell wall is a metal wall.
6. The outer casing according to claim 1, characterized in that, The shell wall has a first installation space to accommodate the first electromagnetic shielding layer. The shell also includes a first heat insulation layer, which is disposed in the first installation space and covers the first electromagnetic shielding layer. The first heat insulation layer completely covers the first electromagnetic shielding layer.
7. A cover plate assembly, characterized in that, Includes a cover plate unit and a second electromagnetic shielding layer; The cover plate unit is used to close the opening in the battery casing; The second electromagnetic shielding layer is encapsulated within the cover plate unit.
8. The cover plate assembly according to claim 7, characterized in that, The cover plate unit includes a cover plate and an pole post; The cover plate is provided with a clearance hole, which penetrates the cover plate along the thickness direction; The pole is connected to the cover plate and closes the clearance hole; The second electromagnetic shielding layer includes a third shielding portion, which is encapsulated within the cover plate; The second electromagnetic shielding layer includes a fourth shielding part, which is encapsulated within the pole post.
9. The cover plate assembly according to claim 8, characterized in that, The pole includes a connecting plate and a connecting post; The connecting plate is connected to the cover plate and seals the clearance hole; The connecting post is connected to the connecting plate and extends into the clearance hole; The fourth shielding part is encapsulated within the connecting plate.
10. The cover plate assembly according to claim 9, characterized in that, The thickness of the connecting plate is h, where 0.05mm ≤ h ≤ 0.1mm.
11. The cover plate assembly according to claim 8, characterized in that, The third shielding part is a ring structure and surrounds the clearance hole; and / or, The third shielding portion forms a central hole around the clearance hole; the fourth shielding portion includes an inner region relative to the central hole and an outer region relative to the third shielding portion, the outer region surrounding and connected to the inner region; and / or, The thickness of the cover plate is f, where 0.2 mm ≤ f ≤ 0.4 mm; and / or, The cover plate has a third cavity to accommodate the third shielding part. The area between the outer side of the cover plate and the third cavity is a welded part. The welded part surrounds the third cavity and is used for welding to the outer shell. The width of the welded part is g, where 0.5 mm ≤ g ≤ 1 mm; and / or, The cover plate has a third cavity to accommodate the third shielding portion. The cover plate assembly further includes a second heat insulation layer located within the third cavity and covering the third shielding portion, wherein the second heat insulation layer completely covers the third shielding portion; and / or, The pole has a fourth cavity to accommodate the fourth shielding part, and the cover plate assembly further includes a third heat insulation layer located inside the fourth cavity and covering the fourth shielding part, wherein the third heat insulation layer completely covers the fourth shielding part.
12. A battery, characterized in that, It includes an electrode core, a housing, and a cover plate assembly; the electrode core is installed inside the housing; the cover plate assembly closes the opening of the housing; The housing is as described in any one of claims 1-6, and / or the cover assembly is as described in any one of claims 7-11.
13. The battery according to claim 12, characterized in that, The electrode core includes an electrode unit, which is composed of a positive electrode plate, a negative electrode plate, and a separator. Along the direction from the outer casing to the cover assembly, the first electromagnetic shielding layer of the outer casing protrudes from the electrode unit.
14. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 12-13.