An electronic device and a method for manufacturing the same

Abstract

The present invention discloses an electronic device and a manufacturing method thereof, wherein the electronic device comprises a shell, a battery cell and a sealing plate assembly, the shell comprises a substrate and a surrounding wall, a receiving cavity for receiving the battery cell is formed between the surrounding wall and the substrate, an opening connected to the receiving cavity is formed at one end of the surrounding wall away from the substrate, and the sealing plate assembly blocks the opening, the sealing plate assembly comprises a body, the body is welded to the shell and blocks the opening, the body has a first side surface close to the receiving cavity and a second side surface opposite to the first side surface, the first side surface is insulated and connected with an electrode guide plate, the electrode guide plate is connected to a pole ear of the battery cell, a first convex portion is protrudingly provided on one side of the electrode guide plate close to the first side surface, a liquid injection hole is penetrated and opened on the first convex portion, a first through hole for the first convex portion to pass through is opened on the body, a conductive sealing cover is insulated and connected to the second side surface, a second convex portion is protrudingly provided on the sealing cover, and the second convex portion is plugged with the liquid injection hole to block the liquid injection hole. The electronic device of the present invention has a simple structure and reliable sealing.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to an electronic device and a manufacturing method thereof. Background Art

[0002] At present, batteries with hard shell structures are usually sealed by extrusion. The battery includes a bottom shell, a cap and a battery cell. The bottom shell and the cap are both shell structures with one end sealed and the other end open. The bottom shell includes a bottom plate and a first surrounding wall arranged around one side of the bottom plate. The cap includes a top plate and a second surrounding wall arranged around one side of the top plate. When the bottom shell and the cap are assembled, the second surrounding wall is sleeved outside the first surrounding wall, and a sealing ring is arranged between the two surrounding walls. During assembly, the battery cell is placed in the bottom shell, and a sealing ring is put on the first surrounding wall of the bottom shell. After liquid injection, the cap is assembled with the bottom shell, and the second surrounding wall and the first surrounding wall are squeezed from the outside to the inside, so that the two surrounding walls are pressed against the sealing ring to achieve sealing. The prior art has the following defects: 1. The length of the second surrounding wall of the cap needs to be controlled. If the size is too short, it will lead to poor sealing during sealing. If it is too long, it will increase the weight of the battery; 2. For batteries with larger sizes, this extrusion sealing method is unreliable and is prone to leakage; 3. The extrusion sealing method causes the internal space of the battery to be occupied by the structure deformed after extrusion, which reduces the battery capacity. Summary of the invention

[0003] An object of an embodiment of the present invention is to provide an electronic device with a simple structure, light weight, high sealing reliability, low processing difficulty, and large electronic device capacity.

[0004] Another object of the embodiment of the present invention is to provide a method for manufacturing an electronic device, which is simple to operate and has good sealing performance for the manufactured electronic device.

[0005] To achieve this purpose, the embodiment of the present invention adopts the following technical solutions:

[0006] In a first aspect, an electronic device is provided, including a shell, a battery cell and a sealing plate assembly, the shell including a substrate and a surrounding wall arranged on one side of the substrate, a receiving cavity for receiving the battery cell being formed between the surrounding wall and the substrate, an opening communicating with the receiving cavity is formed at one end of the surrounding wall away from the substrate, and the sealing plate assembly blocks the opening, the sealing plate assembly includes a main body, the main body is welded to the shell and blocks the opening, the main body has a first side surface close to the receiving cavity and a second side surface opposite to the first side surface, the first side surface is insulated and connected with an electrode conductor, the electrode conductor is connected to a pole ear of the battery cell, a first convex portion is protruded from a side of the electrode conductor close to the first side surface, a liquid injection hole is penetrated through the first convex portion, a first through hole is opened on the main body for the first convex portion to pass through, a conductive sealing cover is insulated and connected to the second side surface, a second convex portion is protruded from the sealing cover, and the second convex portion is plugged into the liquid injection hole to seal the liquid injection hole.

[0007] As a preferred solution of the electronic device, a size of the first through hole is larger than a size of the first protrusion, and an inner wall of the first through hole is spaced apart from an outer wall of the first protrusion.

[0008] As a preferred solution of the electronic device, a first insulating layer is provided between the first side surface and the electrode guide plate, and a second insulating layer is provided between the second side surface and the sealing cover.

[0009] As a preferred solution for the electronic device, one end of the first insulating layer close to the first protrusion abuts against the outer wall of the first protrusion; and / or the second insulating layer covers the second side surface, and the second insulating layer partially extends toward the center of the first through hole into the first through hole.

[0010] As a preferred solution of the electronic device, the first insulating layer is an insulating adhesive layer.

[0011] As a preferred solution of the electronic device, the sealing cover comprises a cover plate, and the second convex portion is protruding from the center of the cover plate.

[0012] As a preferred solution of the electronic device, the electrode guide plate includes a guide plate body, the first convex portion is stamped on the guide plate body, a receiving groove is formed on the side of the guide plate body away from the first convex portion, and the injection hole is provided at the bottom of the receiving groove; or,

[0013] The electrode conductor includes two first plates spaced apart, the two first plates are insulated and connected to the body, one end of the first plate is connected to the second plate at an angle, the two second plates are connected via a third plate at one end away from the first plate, and the injection hole is provided on the third plate.

[0014] As a preferred solution for the electronic device, the battery cell is a wound battery cell, a second through hole is passed through the middle part of the wound battery cell along its axial direction, a support column is arranged in the second through hole, the support column has a liquid conduction cavity, one end of the support column abuts the electrode guide plate, and the other end abuts the substrate, the injection hole is connected with the liquid conduction cavity, and a third through hole is arranged on the outer peripheral wall of the support column, and the third through hole connects the accommodating cavity and the liquid conduction cavity.

[0015] As a preferred solution for the electronic device, the first protrusion is stamped on the electrode guide plate, and a receiving groove is correspondingly formed on a side of the electrode guide plate away from the first protrusion, and the support column is inserted into the receiving groove.

[0016] As a preferred solution for the electronic device, the injection hole is opened at the bottom of the receiving groove, and the support column abuts against the end face of one end of the receiving groove to open a fourth through hole connected to the liquid guiding cavity, and the size of the fourth through hole is not smaller than the size of the injection hole.

[0017] As a preferred solution of the electronic device, it also includes a support frame, which includes a first support member and a second support member arranged at intervals, the first support member and the second support member are connected by a connecting member, the first support member is connected to the main body, the second support member is connected to the substrate, and the connecting member is arranged between the battery cell and the inner wall of the surrounding wall.

[0018] As a preferred solution for the electronic device, the support frame is a metal part, a third insulating layer is arranged between the first support part and the battery cell, the first support part is welded to the body, and the second support part is welded to a pole ear of the battery cell on a side away from the battery cell.

[0019] As a preferred solution for the electronic device, a avoidance hole is provided on the first support member, and the electrode conductive plate is arranged in the avoidance hole and is spaced apart from the hole wall of the avoidance hole.

[0020] As a preferred solution for the electronic device, the battery cell is a wound battery cell, a support column is arranged in the central hole of the wound battery cell, the support column is made of metal, one end of the support column is connected to the side of the body close to the accommodating cavity, and the other end is connected to the inner wall of the substrate, and the support column is spaced apart from the electrode guide plate.

[0021] In a second aspect, a method for manufacturing an electronic device is provided, which is used to manufacture the electronic device, provide a shell, a battery cell and a sealing plate assembly, place the battery cell in the shell, respectively connect the two pole ears of the battery cell to the electrode guide plate of the sealing plate assembly and the shell, weld the sealing plate assembly to the shell, and after liquid injection, install the sealing cover of the sealing plate assembly to seal the liquid injection hole on the electrode guide plate.

[0022] The beneficial effects of the embodiments of the present invention are as follows: by welding the sealing plate assembly to the shell, sealing is achieved. This sealing structure is simple and has a good sealing effect. There is no leakage at all. Moreover, the welding method is sealed without squeezing the shell, and the space inside the shell will not be occupied, so the capacity of the electronic device is large. By opening the injection hole on the electrode guide plate and sealing it with a conductive sealing cover, the structure of the sealing plate assembly can be simplified. The sealing cover not only has the function of sealing the injection hole, but also can serve as a terminal exposed to the outside of the electronic device to achieve electrical conduction, which greatly reduces the space occupied by the structure on the sealing plate assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0024] Figure 1 It is a cross-sectional schematic diagram of an electronic device according to Embodiment 1 of the present invention.

[0025] Figure 2 It is a schematic cross-sectional view of a shell according to the first embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the assembled state of the housing and the battery cell according to the first embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the assembled state of the sealing plate assembly and the shell of the first embodiment of the present invention (the sealing cover is not assembled).

[0028] Figure 5 This is a schematic diagram of the state after the second insulating layer of the first embodiment of the present invention is installed.

[0029] Figure 6 This is a schematic diagram of the state of the sealing cover after installation according to the first embodiment of the present invention.

[0030] Figure 7 It is a cross-sectional schematic diagram of an electronic device according to the second embodiment of the present invention.

[0031] Figure 8 Schematic diagram of the structure of the electrode guide plate according to an embodiment of the present invention.

[0032] Fig. 9 It is a cross-sectional schematic diagram of an electronic device according to Embodiment 3 of the present invention.

[0033] Fig.10 This is a schematic diagram of the assembly of the sealing plate assembly and the support frame of the third embodiment of the present invention.

[0034] Fig.11 This is a schematic diagram of the assembly of the sealing plate assembly, the support frame and the battery cell of the third embodiment of the present invention.

[0035] Fig.12 This is a schematic diagram of the assembly consisting of a sealing plate assembly, a support frame and a battery cell after being assembled with a shell according to the third embodiment of the present invention.

[0036] Fig.13 This is a schematic diagram of the state of the sealing cover after installation according to the third embodiment of the present invention.

[0037] In the figure:

[0038] 1. Shell; 11. Base plate; 12. Surrounding wall; 13. Accommodating cavity; 14. Support part; 2. Battery cell; 21. Positive ear; 22. Negative ear; 23. Second through hole; 3. Sealing plate assembly; 31. Main body; 311. First through hole; 32. Electrode guide plate; 321. First convex part; 322. Liquid injection hole; 323. First plate; 324. Second plate; 325. Third plate; 326. Accommodating groove; 33. Sealing cover; 331. Second convex part; 332. Cover plate; 4. First insulating layer; 5. Second insulating layer; 6. Support column; 61. Liquid guide cavity; 62. Third through hole; 7. Support frame; 71. First support member; 72. Second support member; 73. Connector; 8. Third insulating layer. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] like Figures 1 to 6 As shown, the electronic device of the embodiment of the present invention includes a shell 1, a battery cell 2 and a sealing plate assembly 3, the shell 1 includes a substrate 11 and a surrounding wall 12 arranged on one side of the substrate 11, a receiving cavity 13 for receiving the battery cell 2 is formed between the surrounding wall 12 and the substrate 11, an end of the surrounding wall 12 away from the substrate 11 forms an opening connected to the receiving cavity 13, the sealing plate assembly 3 blocks the opening, and the sealing plate assembly 3 includes a body 31, the body 31 is welded to the shell 1 and blocks the opening, and the body 31 has a first side surface close to the receiving cavity 13 and a first side surface opposite to the first side surface Regarding the second side surface, the first side surface is insulated and connected with an electrode conductor 32, the electrode conductor 32 is connected to a pole ear of the battery cell 2, a first protrusion 321 is protrudingly provided on the side of the electrode conductor 32 close to the first side surface, a liquid injection hole 322 is penetrated through the first protrusion 321, a first through hole 311 is provided on the main body 31 for the first protrusion 321 to pass through, the second side surface is insulated and connected with a conductive sealing cover 33, a second protrusion 331 is protrudingly provided on the sealing cover 33, and the second protrusion 331 is plugged into the liquid injection hole 322 to block the liquid injection hole 322. The sealing is achieved by welding the sealing plate assembly 3 to the shell 1. This sealing structure is simple and has a good sealing effect. There will be no leakage at all. Moreover, the welding method is sealed without squeezing the shell 1, and the space inside the shell 1 will not be occupied, so the capacity of the electronic device is large. By opening the injection hole 322 on the electrode guide plate 32 and sealing it with a conductive sealing cover 33, the structure of the sealing plate assembly 3 can be simplified. The sealing cover 33 not only has the function of sealing the injection hole 322, but also can be used as a terminal exposed to the outside of the electronic device to achieve electrical conduction, which greatly reduces the space occupied by the structure on the sealing plate assembly 3.

[0043] The manufacturing process of this electronic device is as follows: placing the battery cell 2 in the shell 1, connecting the two pole ears of the battery cell 2 to the electrode guide plate 32 of the sealing plate assembly 3 and the shell 1 respectively, welding the sealing plate assembly 3 to the shell 1, and after liquid injection, installing the sealing cover 33 of the sealing plate assembly 3 to seal the injection hole 322 on the electrode guide plate 32.

[0044] The electronic device may be a rechargeable battery (eg, a lithium-ion battery), a non-rechargeable battery (eg, a lithium battery), or a capacitor.

[0045] Furthermore, a support portion 14 is extended toward the outside of the surrounding wall 12 at one end of the surrounding wall 12 away from the substrate 11, and the main body 31 is stacked and welded with the support portion 14. By providing the support portion 14, it can be ensured that the main body 31 and the shell 1 have sufficient position for welding, and the sealing effect is improved, and the sealing requirement after welding can be met without increasing the wall thickness of the shell 1.

[0046] In this embodiment, the battery cell 2 includes a positive electrode tab 21 and a negative electrode tab 22, the positive electrode tab 21 is connected to the electrode guide plate 32, and the negative electrode tab 22 is connected to the inner side of the substrate 11 of the housing 1. In other embodiments, the connection positions of the positive electrode tab 21 and the negative electrode tab 22 can also be interchanged, that is, the negative electrode tab 22 is connected to the electrode guide plate 32, and the positive electrode tab 21 is connected to the inner side of the substrate 11 of the housing 1.

[0047] Alternatively, the positive electrode tab 21 and the negative electrode tab 22 are led out from the same side of the shell 1 , one of the positive electrode tab 21 and the negative electrode tab 22 is connected to the electrode guide plate 32 , and the other is connected to the body 31 of the sealing plate assembly 3 .

[0048] In addition, it is not limited to setting up one sealing plate assembly 3. The shell 1 can also be set as a tubular structure with openings at both ends, and a sealing plate assembly 3 is respectively set at both ends of the shell 1, and the positive electrode ear 21 and the negative electrode ear 22 are respectively connected to the electrode conductors 32 of the two sealing plate assemblies 3.

[0049] In one embodiment, the size of the first through hole 311 is larger than the size of the first protrusion 321, and the inner wall of the first through hole 311 is spaced from the outer wall of the first protrusion 321. This design can prevent the electrode conductive plate 32 from contacting the body 31, thereby preventing the electrode conductive plate 32 from being electrically connected to the body 31.

[0050] Specifically, a first insulating layer 4 is disposed between the first side of the body 31 and the electrode lead plate 32, and a second insulating layer 5 is disposed between the second side and the sealing cover 33. The first insulating layer 4 and the second insulating layer 5 can insulate the electrode lead plate 32, the sealing cover 33 and the body 31.

[0051] The first insulating layer 4 is any one of a PE layer and a modified PP or a combination of the two. The first insulating layer 4 may also include a first adhesive layer and a second adhesive layer, an intermediate layer is arranged between the first adhesive layer and the second adhesive layer, the first adhesive layer and / or the second adhesive layer is any one of a PE layer and a modified PP, and the intermediate layer is a PFA layer.

[0052] Polyethylene (PE) is a thermoplastic resin obtained by polymerization of ethylene. In industry, it also includes copolymers of ethylene and a small amount of α-olefins. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, and can withstand corrosion from most acids and alkalis. It is insoluble in general solvents at room temperature, has low water absorption, and has excellent electrical insulation.

[0053] Polypropylene is a polymer formed by the addition polymerization of propylene (Polypropylene, PP for short), a white waxy material, transparent and light in appearance, flammable, with a melting point of 165°C, softening at about 155°C, and a use temperature range of -30°C to 140°C. Modified PP is obtained by modifying PP. For example, the modified PP used in this embodiment is a metal-adhesive modified polypropylene resin (Metal Adhesive Polypropylene, hereinafter referred to as metal-adhesive modified PP), which can be a metal-adhesive property on the surface of PP through chemical modification methods such as copolymerization, grafting or cross-linking, so that it can be fused with the metal surface by heating to form a good bonding seal.

[0054] PFA Chinese name is tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (also known as perfluoroalkyl compound, soluble polytetrafluoroethylene), which is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt adhesion is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with polytetrafluoroethylene. This resin can be directly processed into products using ordinary thermoplastic molding methods. PFA has a long-term use temperature of -200℃ to 260℃, has excellent chemical corrosion resistance, is resistant to all chemicals, has the lowest friction coefficient among plastics, and has good electrical properties. Its electrical insulation is not affected by temperature, and it is known as the "King of Plastics". PFA has similar chemical resistance to polytetrafluoroethylene, better than vinylidene fluoride, better creep resistance and compression strength than polytetrafluoroethylene, high tensile strength, and an elongation of 100-300%; good dielectric properties, excellent radiation resistance; high flame retardancy; non-toxic, physiologically inert, and can be implanted in the human body.

[0055] In this embodiment, the first insulating layer 4 includes two layers of modified PP separated by a gap, and a PFA layer is disposed between the two layers of modified PP.

[0056] The second insulating layer 5 is an insulating film. By setting the second insulating layer 5 as an insulating film, the thickness of the insulating film can be made very thin, so the thickness of the entire sealing plate assembly 3 can be reduced, and the specific capacity in the housing 1 can be increased. Specifically, the second insulating layer 5 is a PI film.

[0057] Polyimide Film is made of pyromellitic anhydride (PMDA) and diaminodiphenyl ether (DDE) in a strong polar solvent through polycondensation and casting into a film and then imidization. PI film is yellow and transparent, with a relative density of 1.39 to 1.45. PI film has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance, and medium resistance. It can be used for a long time in the temperature range of -269℃ to 280℃, and can reach a high temperature of 400℃ for a short time. The glass transition temperatures are 280℃ (Upilex R), 385℃ (Kapton) and above 500℃ (Upilex S). The tensile strength is 200MPa at 20℃ and greater than 100MPa at 200℃.

[0058] To further improve the insulation effect, one end of the first insulating layer 4 close to the first protrusion 321 abuts against the outer wall of the first protrusion 321 , the second insulating layer 5 covers the second side surface, and a portion of the second insulating layer 5 extends toward the center of the first through hole 311 into the first through hole 311 .

[0059] In one embodiment, the sealing cover 33 includes a cover plate 332, and the center of the cover plate 332 is protruded with the second protrusion 331. By protruding the second protrusion 331 at the center of the cover plate 332, the outer periphery of the second protrusion 331 is provided with the cover plate 332, and after the cover plate 332 abuts against the second side surface of the body 31, a sealing of a surrounding structure is formed, thereby improving the sealing effect of the injection hole 322.

[0060] In addition, the center of the cover plate 332 is punched to form the second convex portion 331. The second convex portion 331 is formed by punching, which can reduce the manufacturing cost of the cover plate 332. There is no need to use a thicker plate to machine the cover plate 332 and the second convex portion 331, nor is there a need to separately set the second convex portion 331 and then weld it to the cover plate 332. The manufacturing cost is low, no assembly is required, and the second convex portion 331 formed by integral punching has high strength and is not easily deformed.

[0061] In one embodiment, if Figure 1 and Figure 8As shown, the electrode guide plate 32 includes two first plates 323 arranged at intervals, the two first plates 323 are insulated and connected to the body 31, one end of the first plate 323 is connected to the second plate 324 at an angle, and the two second plates 324 are connected by a third plate 325 at one end away from the first plate 323, and the injection hole 322 is provided on the third plate 325. This design increases the structural stability of the electrode guide plate 32 after assembly, ensures that the sealing cover 33 is firmly plugged in and is not prone to loosening, and in addition, this structure saves manufacturing costs on the basis of high stability.

[0062] In this embodiment, the electrode guide plate 32 is formed by bending a metal plate in one piece. This design simplifies the number of components of the electrode guide plate 32 and eliminates the need for assembly. At the same time, the bent electrode guide plate 32 is an integrated structure with high strength and is not prone to deformation.

[0063] A receiving groove 326 is formed between the two second plates 324 and the third plate 325 and opens toward the inside of the housing 1. The provision of the receiving groove 326 can not only reduce the weight of the electronic device, but also can be used to accommodate more electrolyte, thereby increasing the specific capacity of the housing 1.

[0064] In other embodiments, the electrode guide plate 32 includes a guide plate body, on which the first protrusion 321 is stamped, and a receiving groove 326 is correspondingly formed on the side of the guide plate body away from the first protrusion 321, and the injection hole 322 is opened at the bottom of the receiving groove 326.

[0065] In order to further improve the sealing effect, the electrode guide plate 32 and the sealing cover 33 may be welded.

[0066] In one embodiment, if Figure 7As shown, the battery cell 2 is a wound battery cell 2, and a second through hole 23 is penetrated in the middle of the wound battery cell 2 along its axial direction, and a support column 6 is arranged in the second through hole 23, and the support column 6 has a liquid conducting cavity 61, one end of the support column 6 abuts against the electrode guide plate 32, and the other end abuts against the substrate 11, the injection hole 322 is connected with the liquid conducting cavity 61, and a third through hole 62 is arranged on the outer peripheral wall of the support column 6, and the third through hole 62 connects the accommodating cavity 13 and the liquid conducting cavity 61. By providing the support column 6, the center of the substrate 11 and the sealing plate assembly 3 can be effectively prevented from being concave, especially in electronic devices with larger size and thinner thickness (for example: the diameter to thickness ratio of the electronic device is greater than or equal to 2:1, preferably, the diameter to thickness ratio of the electronic device is greater than or equal to 4:1, for example: 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc., more preferably, the diameter to thickness ratio of the electronic device is 8:1. Specifically, the thickness of the electronic device is less than 10mm, more preferably 4-10mm). Since the size of the electronic device is larger, the size of the main body 31 and the size of the substrate 11 are larger, and the thickness of the material of the electronic device housing 1 is thinner (for example: the thickness of the material of the electronic device housing 1 is less than 0.2mm, more preferably less than or equal to 0.1mm), it is easy to produce concave during installation, and the concave structure will occupy the space inside the housing 1 of the electronic device, reduce the specific capacity of the electronic device, or it is easy to be squeezed and damaged by external objects during use.

[0067] In this embodiment, the support column 6 is inserted into the receiving groove 326 of the electrode guide plate 32. The receiving groove 326 can limit the position of the support column 6 and can also reduce the space occupied by the support column 6.

[0068] Furthermore, the injection hole 322 is provided at the bottom of the receiving groove 326, and the end surface of the support column 6 abutting against one end of the receiving groove 326 is provided with a fourth through hole communicating with the liquid guiding cavity 61, and the size of the fourth through hole is not less than the size of the injection hole 322. This design can prevent the fourth through hole from hindering the insertion of the second protrusion 331, and can also ensure the injection effect and speed.

[0069] Preferably, the fourth through hole and the injection hole 322 are concentrically arranged.

[0070] If the injection hole 322 is set in the center hole of the wound battery cell 2, the advantage is that the second protrusion 331 of the sealing cover 33 is set in the center hole of the wound battery cell 2 which has a center hole, which is beneficial to improve the space utilization of the electronic device.

[0071] Secondly, if Figure 7In the structural design shown, the support column 6 is made of insulating material, so as not to cause electrical conduction between the sealing plate assembly 3 and the housing 1, resulting in a short circuit. For example, it can be plastic or metal coated with insulating material. In addition, the tab connected to the bottom of the housing 1 can also be attached to the housing 1 by force through the support column 6 without welding.

[0072] In addition, in order to reduce the difficulty of aligning the fourth through hole and the injection hole 322, a positioning protrusion can be protruded on one of the end surface of the support column 6 and the bottom of the receiving groove 326, and a positioning groove can be recessed on the other of the end surface of the support column 6 and the bottom of the receiving groove 326, and the positioning protrusion is plugged into the positioning groove.

[0073] In other embodiments, the support column 6 may be made of metal, one end of the support column 6 is connected to the side of the body 31 close to the accommodating cavity 13, and the other end is connected to the inner wall of the substrate 11, and the support column 6 is spaced apart from the electrode guide plate 32. The support column 6 of the metal structure has high strength and will not deform, and the support column 6 is spaced apart from the electrode guide plate 32 to prevent the positive and negative electrodes of the electronic device from being connected and causing a short circuit.

[0074] The connection between the support column 6 and the shell 1 can be adhesive or welding. When the metal support column 6 is made of metal, it is preferred to assemble the electronic device and then perform resistance welding on the support column 6 from the outside of the shell 1. This can reduce the difficulty of assembly and improve welding reliability. Preferably, one of the pole ears of the battery cell 2 is placed between the metal support column 6 and the shell 1, and the support column 6, the pole ear and the shell 1 are resistance welded through the outside of the shell 1.

[0075] The specific steps for making electronic devices are as follows:

[0076] Step S100: Figure 3 As shown, the battery cell 2 is placed in the accommodating cavity 13 of the shell 1, and then the negative electrode ear 22 of the battery cell 2 is welded to the inner side surface of the substrate 11 of the shell 1;

[0077] Step S200: Figure 4 As shown, the body 31, the first insulating layer 4 and the electrode guide plate 32 are formed into an assembly, and then the assembly is welded (preferably laser welded) to the support portion 14 of the shell 1. When making the shell 1 and the body 31, a margin is reserved in advance to facilitate welding;

[0078] Step S300: Figure 4 As shown, injection and formation;

[0079] Step S400: Figure 5 As shown, the second insulating layer 5 is pasted on the second side surface of the body 31;

[0080] Step S500: Figure 6 As shown, the sealing cover 33 is assembled on the body 31, and the second protrusion 331 of the sealing cover 33 is inserted into the injection hole 322 of the first protrusion 321 of the electrode guide plate 32, and then the body 31 and the support part 14 are welded to achieve sealing.

[0081] Step S600: draw a margin line on the body 31 or the support portion 14, and then cut the excess structure along the margin line to form a Figure 4 The electronic device shown.

[0082] The step of attaching the second insulating layer 5 to the second side surface of the body 31 is not limited to after the electronic device is formed, but can also be attached to the second side surface of the body 31 when manufacturing the assembly consisting of the body 31, the first insulating layer 4 and the electrode guide plate 32.

[0083] In other embodiments, Figure 7 The middle support column 6 can be replaced with other structures to achieve the same support function. Figures 9 to 13 As shown, a support frame 7 is arranged in the shell 1, and the support frame 7 includes a first support member 71 and a second support member 72 arranged at intervals, the first support member 71 and the second support member 72 are connected by a connecting member 73, the first support member 71 is connected to the main body 31, the second support member 72 is connected to the substrate 11, and the connecting member 73 is arranged between the battery cell 2 and the inner wall of the surrounding wall 12. By setting the support frame 7, the shell 1 and the main body 31 of the sealing plate assembly 3 can be supported, which is beneficial to prevent large-diameter and ultra-thin electronic devices (for example: the diameter to thickness ratio of the electronic device is greater than or equal to 2:1, preferably, the diameter to thickness ratio of the electronic device is greater than or equal to 4:1, for example: 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc., more preferably, the diameter to thickness ratio of the electronic device is 8:1. Specifically, the thickness of the electronic device shell 1 material is less than 0.2mm, more preferably less than or equal to 0.1mm, specifically, the thickness of the electronic device is less than 10mm, more preferably 4-10mm) from swelling, deformation and depression. In addition, the structure of the support frame 7 is not only applicable to wound battery cells 2, but also to stacked battery cells 2, and has a wide range of applications.

[0084] In this embodiment, the support frame 7 is a metal part, a third insulating layer 8 is arranged between the first support member 71 and the battery cell 2, the first support member 71 is welded to the body 31, and the second support member 72 is welded to a pole ear of the battery cell 2 on the side away from the battery cell 2. Specifically, the second support member 72 is welded to the negative pole ear 22. By setting the support frame 7 as a metal part, the support frame 7 and the body 31 can be welded and fixed as a whole, and the positive pole ear 21 and the negative pole ear 22 of the battery cell 2 can be welded to the sealing plate assembly 3 on the outside of the shell 1 in advance, which reduces the difficulty of operation and facilitates the realization of automated assembly. Of course, the support frame 7 can also be made of high-strength, corrosion-resistant non-metallic material, and the support frame 7 is connected to the body 31 and the shell 1 by dispensing.

[0085] The first support member 71 and the second support member 72 are both perpendicular to the connecting member 73 , and the first support member 71 and the second support member 72 are located on the same side of the connecting member 73 to form a U-shaped support frame 7 .

[0086] Furthermore, the first support member 71 is provided with an avoidance hole (not shown in the figure), and the electrode conductive plate 32 is arranged in the avoidance hole and spaced from the hole wall of the avoidance hole. Preferably, the first support member 71 is an annular plate, whose inner hole is the avoidance hole, and whose outer periphery is connected to the connecting member 73.

[0087] The specific steps for making electronic devices are as follows:

[0088] Step S100: Fig.10 As shown, the body 31, the first insulating layer 4 and the electrode guide plate 32 are formed into an assembly, and then the support frame 7 is welded to the body 31;

[0089] Step S200: Fig.11 As shown, the battery cell 2 is placed between the electrode guide plate 32 and the second support member 72 of the support frame 7, and the positive electrode tab 21 of the battery cell 2 is welded to the electrode guide plate 32, and the negative electrode tab 22 is welded to the second support member 72;

[0090] Step S300: Fig.12 As shown, the battery cell 2, the support frame 7 and the sealing plate assembly 3 are placed in the accommodating cavity 13 of the shell 1, and then the body 31 is welded to the supporting portion 14 of the shell 1. When making the shell 1 and the body 31, a margin is reserved in advance to facilitate welding;

[0091] Step S400, liquid injection and formation;

[0092] Step S500: Fig.13 As shown, the second insulating layer 5 is pasted on the second side surface of the body 31;

[0093] Step S500: Fig.13As shown, the sealing cover 33 is assembled on the body 31, and the second protrusion 331 of the sealing cover 33 is inserted into the injection hole 322 of the first protrusion 321 of the electrode guide plate 32, and then the body 31 and the support part 14 are welded to achieve sealing.

[0094] Step S600: draw a margin line on the body 31 or the support portion 14, and then cut the excess structure along the margin line to form a Fig. 9 The electronic device shown.

[0095] Of course, the battery core 2, the sealing plate assembly 3 and the housing 1 may be assembled first, and then the positive and negative electrodes may be welded from the outside of the electronic device, preferably by resistance welding.

[0096] In the description of this article, it is necessary to understand that the term "upper" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, 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 cannot be understood as a limitation on the present invention.

[0097] In the description of this specification, the description of reference term "an embodiment" etc. means that the specific features, structures, materials or characteristics of the embodiment are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment.

[0098] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0099] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An electronic device, comprising a shell, a battery cell and a sealing plate assembly, wherein the shell comprises a substrate and a surrounding wall arranged on one side of the substrate, a receiving cavity for receiving the battery cell is formed between the surrounding wall and the substrate, an end of the surrounding wall away from the substrate forms an opening communicating with the receiving cavity, and the sealing plate assembly blocks the opening, characterized in that: The sealing plate assembly comprises a body, the body is welded to the shell and blocks the opening, the body has a first side surface close to the accommodating cavity and a second side surface opposite to the first side surface, the first side surface is insulated and connected with an electrode guide plate, the electrode guide plate is connected with a pole ear of the battery cell, a first convex portion is protrudingly provided on one side of the electrode guide plate close to the first side surface, a liquid injection hole is formed through the first convex portion, a first through hole is formed on the body for the first convex portion to pass through, a conductive sealing cover is insulated and connected with the second side surface, a second convex portion is protrudingly provided on the sealing cover, and the second convex portion is plugged into the liquid injection hole to block the liquid injection hole; The size of the first through hole is larger than that of the first protrusion, and the inner wall of the first through hole is spaced apart from the outer wall of the first protrusion; A first insulating layer is disposed between the first side surface and the electrode guide plate, and a second insulating layer is disposed between the second side surface and the sealing cover.

2. The electronic device according to claim 1, characterized in that: One end of the first insulating layer close to the first protrusion abuts against the outer wall of the first protrusion; and / or the second insulating layer covers the second side surface, and the second insulating layer partially extends toward the center of the first through hole into the first through hole.

3. The electronic device according to claim 1, characterized in that: The first insulating layer is an insulating adhesive layer.

4. The electronic device according to claim 1, characterized in that: The sealing cover comprises a cover plate, and the second convex portion is protrudingly provided at the center of the cover plate.

5. The electronic device according to claim 1, characterized in that: The electrode guide plate comprises a guide plate body, the first convex portion is formed by punching the guide plate body, a receiving groove is formed on the side of the guide plate body away from the first convex portion, and the injection hole is provided at the bottom of the receiving groove; or, The electrode conductor includes two first plates spaced apart, the two first plates are insulated and connected to the body, one end of the first plate is connected to the second plate at an angle, the two second plates are connected via a third plate at one end away from the first plate, and the injection hole is provided on the third plate.

6. The electronic device according to claim 1, characterized in that: The battery cell is a wound battery cell, a second through hole is penetrated in the middle of the wound battery cell along its axial direction, a support column made of non-metallic material is arranged in the second through hole, the support column has a liquid conduction cavity, one end of the support column abuts the electrode guide plate, and the other end abuts the substrate, the injection hole is connected with the liquid conduction cavity, and a third through hole is arranged on the outer peripheral wall of the support column, and the third through hole connects the accommodating cavity and the liquid conduction cavity.

7. The electronic device according to claim 6, characterized in that: The first protrusion is punched on the electrode guide plate, and a receiving groove is correspondingly formed on a side of the electrode guide plate away from the first protrusion, and the support column is inserted into the receiving groove.

8. The electronic device according to claim 7, characterized in that: The injection hole is formed at the bottom of the receiving groove, and the end surface of the support column abutting against one end of the receiving groove is provided with a fourth through hole connected with the liquid guiding cavity, and the size of the fourth through hole is not less than that of the injection hole.

9. The electronic device according to claim 1, characterized in that: It also includes a support frame, which includes a first support member and a second support member arranged at intervals, the first support member and the second support member are connected by a connecting member, the first support member is connected to the body, the second support member is connected to the substrate, and the connecting member is arranged between the battery cell and the inner wall of the surrounding wall.

10. The electronic device according to claim 9, characterized in that: The support frame is a metal piece, a third insulating layer is arranged between the first support piece and the battery cell, the first support piece is welded to the body, and the second support piece is welded to a tab of the battery cell on a side away from the battery cell.

11. The electronic device according to claim 9, characterized in that: The first supporting member is provided with an avoidance hole, and the electrode conductive plate is arranged in the avoidance hole and is spaced apart from the hole wall of the avoidance hole.

12. The electronic device according to claim 1, characterized in that: The battery cell is a wound battery cell, and a support column is arranged in the central hole of the wound battery cell. The support column is made of metal, one end of the support column is connected to the side of the body close to the accommodating cavity, and the other end is connected to the inner wall of the substrate. The support column is spaced apart from the electrode guide plate.

13. A method for manufacturing an electronic device, characterized in that: Used to make an electronic device as described in any one of claims 1 to 12, providing a shell, a battery cell and a sealing plate assembly, placing the battery cell in the shell, respectively connecting the two pole ears of the battery cell to the electrode guide plate of the sealing plate assembly and the shell, welding the sealing plate assembly to the shell, and after liquid injection and formation, installing the sealing cover of the sealing plate assembly to seal the injection hole on the electrode guide plate.

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