CN212011032U

CN212011032U - Electronic device

Info

Publication number: CN212011032U
Application number: CN202020671877.4U
Authority: CN
Inventors: 刘亮亮; 祝媛; 袁中直; 刘建华; 刘金成
Original assignee: Huizhou Yiwei Energy Battery Co ltd; Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-11-24
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses an electronic device, including the base shell, apron and electric core, the base shell includes the base plate and encloses the leg of establishing in base plate one side, form the chamber that holds electric core between leg and the base plate, the one end that the base plate was kept away from to the leg forms and holds the opening that the chamber communicates, apron shutoff opening, the one end that the base plate was kept away from to the leg extends towards the outside of leg has the supporting part, the apron is connected with the supporting part, be provided with the through-hole on the leg, through-hole department is provided with the polar plate subassembly of shutoff through-hole, the polar plate subassembly is connected with. The utility model discloses an electron device simple structure, it is sealed reliable.

Description

Electronic device

Technical Field

The utility model relates to an electronic equipment technical field especially relates to an electronic device.

Background

The existing coin-type battery is usually sealed by adopting an extrusion mode, poor sealing is easy to occur, the internal space of the battery is occupied by a deformed structure after extrusion by the extrusion sealing mode, the battery capacity is reduced, in addition, if the diameter of the coin-type battery is further enlarged, the traditional extrusion sealing mode cannot meet the sealing requirement, the battery shell material needs to adopt a thicker material to further resist the bulging of the battery shell caused by the expansion force of the battery, and if the thickness of the shell material is increased, the coin-type battery is limited to be made into an ultra-thin type.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the electronic device is simple in structure, thin in thickness, high in sealing reliability, low in processing difficulty and large in capacity.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

the utility model provides an electronic device, includes base casing, apron and electric core, the base casing includes the base plate and encloses to be established the leg of base plate one side, the leg with form between the base plate and hold the chamber that holds of electric core, the leg is kept away from the one end of base plate form with hold the opening of chamber intercommunication, the apron shutoff the opening, the leg is kept away from the one end orientation of base plate the outside of leg is extended there is the supporting part, the apron with the supporting part is connected, be provided with the through-hole on the leg, through-hole department is provided with the shutoff the polar plate subassembly of through-hole, the polar plate subassembly with a utmost point ear of electric core is connected.

As a preferable mode of the electronic device, the pole plate assembly is connected to the surrounding wall in an insulated manner, and the cover plate is welded to the supporting portion.

As a preferable scheme of the electronic device, the plate assembly includes a plate body and an extraction terminal, the plate body is connected to the inner wall of the surrounding wall through a first insulating layer, the extraction terminal is connected to the plate body, and the extraction terminal passes through the through hole and protrudes out of the outer wall of the surrounding wall.

As a preferable scheme of the electronic device, the leading-out terminal is of a composite layer structure, the leading-out terminal comprises an external connecting layer and an internal connecting layer, the internal connecting layer is welded with the pole plate main body, and the internal connecting layer and the pole plate main body are made of the same material.

As a preferred scheme of the electronic device, the electrode plate main body is connected with one tab of the battery cell through a connecting band, the other tab of the battery cell is connected with the inner side wall of the substrate, and the connecting band is consistent with the corresponding tab in material.

As a preferable aspect of the electronic device, a diameter-to-thickness ratio of the electronic device is 2: 1.

as a preferable aspect of the electronic device, the thickness of the electronic device is less than 10 mm.

As a preferred scheme of the electronic device, the battery cell is a winding battery cell, a support column is arranged in the middle of the winding battery cell, and two ends of the support column are respectively connected with the cover plate and the substrate.

As an optimal scheme of the electronic device, be provided with on the apron and annotate the liquid hole, it leads the sap cavity to have in the support column, be provided with on the support column with the entry and the export of leading the sap cavity intercommunication, the entry with annotate liquid hole intercommunication, the export with hold the chamber intercommunication, annotate the downthehole shutoff piece that is provided with of liquid.

As a preferable scheme of the electronic device, the pole plate assembly is in insulated connection with the surrounding wall, and the supporting column is made of metal;

the support column is welded with the cover plate; and/or the supporting column is welded with the substrate.

The utility model discloses beneficial effect does: by arranging the supporting part, the cover plate and the base shell can be connected in a laminating way to realize sealing without extrusion sealing, so that the sealing difficulty of the electronic device is effectively reduced, the space in the base shell cannot be changed in the sealing stage, and the capacity of the electronic device is effectively ensured; through setting up the polar plate subassembly on the leg for do not occupy by the polar plate subassembly on the electronic device thickness direction, attenuate the size of the thickness direction of electronic device, set up the polar plate subassembly on the leg simultaneously and can also utilize the supporting part of evagination to hide, can not increase the diameter of electronic device.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional view of an electronic device according to an embodiment of the present invention.

Fig. 2 is a schematic view of the assembled base shell and plate assembly according to the embodiment of the present invention.

Fig. 3 is an assembly diagram of the cover plate and the supporting pillars according to the embodiment of the present invention.

Fig. 4 is a schematic diagram of a state in which the battery cell is installed in the base casing according to the embodiment of the present invention.

Fig. 5 is a schematic diagram of a state after the positive tab and the connection band are welded according to an embodiment of the present invention.

Fig. 6 is a schematic view of the cover plate and the base shell according to the embodiment of the present invention after assembly.

Fig. 7 is a schematic view of the state of the plugging member according to the embodiment of the present invention after being loaded into the liquid injection hole.

In the figure:

1. a base shell; 11. a substrate; 12. a surrounding wall; 13. an accommodating chamber; 14. a support portion; 15. a through hole; 16. a second insulating layer;

2. a cover plate; 21. a liquid injection hole;

3. an electric core; 31. a positive tab; 32. a negative tab;

4. a pole plate assembly; 41. a plate body; 411. a body; 412. a convex portion; 42. a lead-out terminal; 421. an external connection layer; 422. an internal connection layer; 423. an intermediate layer;

5. a first insulating layer; 6. a connecting belt; 7. a support pillar; 71. a drainage cavity; 72. an outlet; 8. a closure.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, an embodiment of the present invention provides an electronic device, including base shell 1, cover plate 2 and electric core 3, base shell 1 includes base plate 11 and encloses and establishes leg 12 on one side of base plate 11, leg 12 with form between the base plate 11 and hold chamber 13 that holds of electric core 3, leg 12 keeps away from the one end of base plate 11 form with hold the opening of chamber 13 intercommunication, 2 shutoff of apron the opening, leg 12 keeps away from the one end orientation of base plate 11 the outside of leg 12 extends there is supporting part 14, cover plate 2 with supporting part 14 connects, be provided with through-hole 15 on the leg 12, through-hole 15 department is provided with the shutoff pole plate assembly 4 of through-hole 15, pole plate assembly 4 with a utmost point ear of electric core 3 connects. By arranging the supporting part 14, the cover plate 2 and the base shell 1 can be connected in a laminating way to realize sealing without extrusion sealing, so that the sealing difficulty of the electronic device is effectively reduced, the space in the base shell 1 cannot be changed in the sealing stage, and the capacity of the electronic device is effectively ensured; by arranging the electrode plate assembly 4 on the surrounding wall 12, the electronic device is not occupied by the electrode plate assembly 4 in the thickness direction, and the size of the electronic device in the thickness direction is reduced.

The electronic device may be a rechargeable battery (e.g., a lithium ion battery), a non-rechargeable battery (such as a lithium battery), or a capacitor.

Furthermore, the height of the portion of the pole plate assembly 4 protruding outside the surrounding wall 12 is H1, the height of the portion of the support portion 14 protruding outside the surrounding wall 12 is H2, and H2 is equal to or greater than H1. This design allows the pole plate assembly 4 disposed on the enclosure wall 12 to be concealed by the outwardly projecting support portion 14 without further increasing the diameter of the electronic device.

In this embodiment, the pole plate assembly 4 is connected to the surrounding wall 12 in an insulated manner, and the cover plate 2 is welded to the supporting portion 14. The cover plate 2 and the supporting part 14 are welded, so that the cover plate and the supporting part are welded in a stitch welding mode to realize sealing, and the sealing effect is good.

Specifically, the battery cell 3 includes a positive tab 31 and a negative tab 32, the positive tab 31 is welded to the electrode plate assembly 4, and the negative tab 32 is welded to the inner sidewall of the substrate 11 of the base casing 1.

In other embodiments, the cover plate 2 may be connected to the supporting portion 14 in an insulating manner, that is, the cover plate 2 is connected to the supporting portion 14 through an insulating sealant, the electrode plate assembly 4 is welded to the surrounding wall 12 directly, and electrical conduction may be achieved, where the positive tab 31 is welded to the electrode plate assembly 4, and the negative tab 32 is welded to the cover plate 2.

The connection positions of the positive tab 31 and the negative tab 32 can also be interchanged, that is, the negative tab 32 is welded to the plate assembly 4, and the positive tab 31 is welded to the base plate 11 or the cover plate 2.

Electric core 3 can be coiling formula electricity core 3, also can be lamination formula electricity core 3, and when electric core 3 was coiling formula electricity core 3, positive ear 31 and negative pole ear 32 can be drawn forth from the both ends of coiling formula electricity core 3's axis direction, and positive ear 31 welds with polar plate subassembly 4 after buckling again, and the axis perpendicular to base plate 11 of coiling formula electricity core 3 this moment. The positive electrode tab 31 and the negative electrode tab 32 may be led out from the same end of the wound cell 3, instead of the positive electrode tab 31 and the negative electrode tab 32 being led out from both ends of the wound cell 3 in the axial direction.

In other embodiments, the positive electrode tab 31 and the negative electrode tab 32 may also be led out from the radial direction of the winding type battery cell 3.

The positive tab 31 may be integrally formed with the positive plate of the electric core 3, that is, the positive plate includes a positive current collector and a positive material coated on the positive current collector, the positive current collector has an extension portion extending to the outside of the positive material, and the extension portion forms the positive tab 31. Alternatively, the positive electrode collector has a blank foil area on which the positive electrode material is not coated, and the positive electrode tab 31 is welded to the blank foil area.

The negative electrode tab 32 may be integrally formed with the negative electrode sheet of the electric core 3, that is, the negative electrode sheet includes a negative electrode current collector and a negative electrode material coated on the negative electrode current collector, the negative electrode current collector has an extension portion extending to the outside of the negative electrode material, and the extension portion forms the negative electrode tab 32. Alternatively, the negative electrode current collector has an empty foil area, to which the negative electrode tab 32 is welded, that is not coated with the negative electrode material.

In one embodiment, the electrode plate assembly 4 includes an electrode plate body 41 and an extraction terminal 42, the electrode plate body 41 is connected to the inner wall of the surrounding wall 12 through the first insulating layer 5, the extraction terminal 42 is connected to the electrode plate body 41, and the extraction terminal 42 protrudes out of the outer wall of the surrounding wall 12 through the through hole 15.

Specifically, the plate main body 41 includes a main body 411 and a protrusion 412 protruding from one side of the main body 411, the protrusion 412 extends into the through hole 15, the main body 411 is connected to the inner wall of the surrounding wall 12 through the first insulating layer 5, the protrusion 412 is spaced from the wall of the through hole 15, the lead terminal 42 is welded to the protrusion 412, and the lead terminal 42 is in a flat plate shape. By providing the convex portion 412, the lead-out terminal 42 can be supported, and the flat lead-out terminal 42 can reduce the height of the outer side surface protruding beyond the surrounding wall 12, and in addition, the flat lead-out terminal 42 can effectively reduce the difficulty in manufacturing and assembling the electrode plate assembly 4.

Specifically, the leading-out terminal 42 is a composite layer structure, the leading-out terminal 42 includes an external connection layer 421 and an internal connection layer 422, the internal connection layer 422 is welded to the plate body 41, and the internal connection layer 422 and the plate body 41 are made of the same material. The internal connection layer 422 is made of the same material as the plate body 41, so that the difficulty of welding and bonding can be reduced.

Preferably, the positive tab 31 is aluminum foil, the plate body 41 is aluminum plate, and the internal connection layer 422 is aluminum foil. In order to avoid oxidation of the portion of the lead-out terminal 42 outside the base case 1, the external connection layer 421 is provided as a nickel layer.

In order to increase the strength of the lead terminal 42 and reduce the deformation of the lead terminal 42, an intermediate layer 423 may be provided between the external connection layer 421 and the internal connection layer 422, and the intermediate layer 423 may be made of stainless steel having a high strength.

The pole plate main body 41 is connected with the positive electrode tab 31 of the battery cell 3 through a connecting band 6, and the connecting band 6 is consistent with the material of the positive electrode tab 31. By providing the connection band 6, it is easier to connect the plate body 41 with the positive tab 31 of the electric core 3, and of course, in other embodiments, the positive tab 31 may be directly connected with the plate body 41.

The first insulating layer 5 is any one or two combinations of a PE layer and a modified PP layer, the first insulating layer 5 further comprises a first adhesive layer and a second adhesive layer, a third adhesive 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 the PE layer or the modified PP layer, and the third adhesive layer is a PFA layer.

Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. In industry, copolymers of ethylene with small amounts of alpha-olefins are also included. The polyethylene is odorless, nontoxic, has wax-like hand feeling, excellent low-temperature resistance and good chemical stability, and can resist corrosion of most of acid and alkali. Is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation.

Polypropylene (PP) is a polymer formed by propylene addition polymerization, is a white waxy material, is transparent and light in appearance and flammable, has a melting point of 165 ℃, is softened at about 155 ℃, and has a use temperature range of-30-140 ℃. The modified PP is modified based on PP, for example, the modified PP used in this embodiment is a Metal-philic modified Polypropylene resin (hereinafter, referred to as Metal-philic modified PP), which can be chemically modified based on PP by copolymerization, grafting or crosslinking to make the surface have Metal-philic characteristics, so that the modified PP can be fused with the Metal surface by heating to form a good bonding seal.

PFA is known as tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (also known as perfluoroalkoxy, soluble polytetrafluoroethylene), which is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. The melt cohesiveness is enhanced, the melt viscosity is reduced, and the performance is unchanged compared with the polytetrafluoroethylene. The resin can be directly processed into products by adopting a common thermoplastic molding method. PFA has excellent chemical corrosion resistance at a long-term use temperature of-200 ℃ to 260 ℃, resists all chemicals, has the lowest friction coefficient in plastics, has good electrical property, has no temperature influence on electrical insulation, and is called as 'plastics king'. The PFA has chemical resistance similar to that of polytetrafluoroethylene, better than vinylidene fluoride, better creep resistance and compression strength than that of polytetrafluoroethylene, high tensile strength and elongation of up to 100-; the dielectric property is good, and the radiation resistance is excellent; the flame retardance is high; has no toxicity or harm, has physiological inertia, and can be implanted into human body.

In this embodiment, the first insulating layer 5 comprises two spaced apart layers of modified PP with a PFA layer disposed therebetween.

The outer side wall of the surrounding wall 12 is provided with a second insulating layer 16, and the second insulating layer 16 is provided with an avoiding hole for the leading-out terminal 42 to pass through.

The second insulating layer 16 is an insulating film. By providing the second insulating layer 16 as an insulating film, the thickness of the insulating film can be made thin, avoiding the second insulating layer 16 from occupying the space of the outer wall of the surrounding wall 12. Specifically, the second insulating layer 16 is a PI film.

Polyimide film (polyimide film) is prepared by polycondensation and film-casting of pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (DDE) in a strong polar solvent, and imidization. The PI film is yellow and transparent, the relative density is 1.39-1.45, the PI film has excellent high and low temperature resistance, electrical insulation, cohesiveness, radiation resistance and medium resistance, can be used for a long time within the temperature range of-269-280 ℃, and can reach the high temperature of 400 ℃ in a short time. The glass transition temperatures were 280 ℃ (Uplix R), 385 ℃ (Kapton) and 500 ℃ or higher (Uplix S), respectively. The tensile strength is 200MPa at 20 ℃ and is more than 100MPa at 200 ℃.

In this embodiment, the electronic device is cylindrical with a diameter to thickness ratio of 2:1 or more, preferably 4:1 or more, for example: 5: 1,6:1,7: 1,8: 1,9: 1,10: 1, etc., more preferably, the electronic device has a diameter to thickness ratio of 8: the thickness of the electronic device is less than 10mm, more preferably the thickness of the electronic device is 4-10 mm. Specifically, the thickness of the electronic device housing material is less than 0.2mm, more preferably 0.10mm or less.

In an embodiment, the battery cell 3 is a winding battery cell 3, a support pillar 7 is disposed in the middle of the winding battery cell 3, and two ends of the support pillar 7 are respectively connected to the cover plate 2 and the substrate 11. By providing the supporting pillars 7, on one hand, the centers of the substrate 11 and the cover plate 2 can be effectively prevented from being recessed, especially in the electronic device with larger size and thinner thickness (for example, the diameter-to-thickness ratio 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, the thickness of the electronic device is less than 10mm, more preferably, the thickness of the electronic device is 4-10 mm. specifically, the thickness of the electronic device housing material is less than 0.2mm, more preferably less than or equal to 0.10mm), because the electronic device has larger size, the cover plate 2 and the substrate 11 are larger in size, the recess is easy to generate during installation, the recessed structure occupies the space in the base housing 1 of the electronic device, the specific capacity of the electronic device is reduced, and on the other hand, the deformation of the shell of the electronic device caused by the expansion force in the electronic device can be effectively resisted.

Specifically, be provided with on the apron 2 and annotate liquid hole 21, drain chamber 71 has in the support column 7, be provided with on the support column 7 with the entry and the export 72 of drain chamber 71 intercommunication, the entry with annotate liquid hole 21 intercommunication, export 72 with hold the chamber 13 intercommunication, be provided with shutoff piece 8 in annotating the liquid hole 21. Just to setting up through the entry that will annotate liquid hole 21 and support column 7, can utilize the intensity of annotating liquid hole 21 department in the reinforcing of support column 7, the thickness of electron device's apron 2 is thin usually, when generally carrying out the shutoff to annotating liquid hole 21, or select the welding mode to carry out the shutoff, or select to fill in shutoff piece 8 and carry out the shutoff, to the welding mode, the operation is complicated, manufacturing cost has been increased, and to filling in shutoff piece 8 and carry out the shutoff, great pressure will make the thin apron 2 of thickness take place to warp, and the utility model discloses a fill in shutoff piece 8's mode, combine support column 7's intensity, also can prevent when can guaranteeing sealed effect that apron 2 warp. In the present embodiment, the size of the pour hole 21 is smaller than or equal to the size of the inlet.

In addition, the support column 7 is arranged in the center hole of the winding type battery cell 3, and the liquid injection hole 21 is also arranged in the center hole of the winding type battery cell 3, so that the space utilization rate of the electronic device is improved. (because there is a hole in the middle of the general winding type battery cell 3, this scheme is equivalent to using the space of this hole) specifically, the plugging member 8 is a conical sealing nail, and the sealing nail is forcibly nailed into the entrance of the support pillar 7 by external force to achieve sealing. In other embodiments, the blocking element 8 may also be provided as a spherical steel ball, the diameter of which is slightly larger than the inlet, so that the steel ball can be fixed and sealed after being forcibly pressed into the inlet.

In this embodiment, the pole plate assembly 4 is connected to the surrounding wall 12 in an insulating manner, the supporting column 7 is made of metal, and the supporting column 7 is welded to at least the cover plate 2. Support column 7 adopts the metal to make and as an organic whole with apron 2 welding, not only can be convenient for apron 2 and support column 7 equipment, prevents effectively in addition that support column 7 from removing for apron 2, and then guarantees that 8 shutoff of shutoff piece are annotated and is sealed effectual behind the liquid hole 21.

It is of course also possible to weld the supporting posts 7 to the base plate 11, further preventing the supporting posts 7 from moving relative to the base housing 1. Further, the negative electrode tab 32 is arranged between the support post 7 and the substrate 11, and the three are welded together, preferably, the three are resistance welded outside the electronic device, so that the assembly difficulty can be simplified, and more reliable welding can be realized.

In other embodiments, the supporting pillars 7 may also be made of hard nonmetal, and the upper and lower ends of the supporting pillars 7 are bonded to the cover plate 2 and the substrate 11 by corrosion-resistant sealant, where the sealant needs to be a material that does not react with the electrolyte.

The specific manufacturing steps of the electronic device are as follows:

step S100, as shown in FIG. 3, welding the support pillar 7 and the cover plate 2 into a whole;

step S200, as shown in FIG. 2, welding the electrode plate assembly 4 with the connecting strip 6, then assembling with the surrounding wall 12 of the base shell 1, and then attaching the second insulating layer 16 to the outer side of the surrounding wall 12 of the base shell 1;

step S300, as shown in fig. 4 and 5, placing the winding-type electric core 3 in the base casing 1, placing insulation sheets on the upper and lower end faces of the winding-type electric core 3, then welding the positive tab 31 with the connection band 6, and bending the positive tab 31 to be located in the base casing 1 after welding;

step S400, as shown in fig. 6, installing the structure in which the cover plate 2 and the supporting column 7 are integrated on the base casing 1, so that the supporting column 7 is inserted into the middle of the winding-type cell 3 and the negative electrode tab 32 abuts against the inner side of the substrate 11, and then welding the supporting column 7, the negative electrode tab 32 and the substrate 11 from the outer side of the base casing 1, preferably using resistance welding;

step S500, welding the cover plate 2 and the supporting part 14 on the base shell 1;

step S600, liquid injection and formation;

step S700, as shown in fig. 7, press-fitting the plugging member 8;

step S800, drawing a margin line on the cover plate 2, and cutting off the redundant structure of the cover plate 2 to form the electronic device shown in fig. 1, wherein a margin is reserved in advance when the base shell 1 and the cover plate 2 are manufactured, so that the support portion 14 of the base shell 1 can be welded with the cover plate 2 conveniently.

The insulating sheets on the upper and lower end surfaces of the battery cell 3 may also be replaced by other structures, for example, the portion of the diaphragm of the battery cell 3 extending to the outside of the positive electrode sheet and the negative electrode sheet may be bent to form an insulating sheet for shielding and isolating the battery cell 3 from the cover plate 2 or the substrate 11 of the base casing 1.

In the description herein, it is to be understood that the terms "upper" and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, configuration and operation in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides an electronic device, includes base casing, apron and electric core, the base casing includes the base plate and encloses to be established the leg of base plate one side, the leg with form between the base plate and hold the chamber that holds of electric core, the leg is kept away from the one end of base plate form with hold the opening of chamber intercommunication, the apron shutoff the opening, its characterized in that, the leg is kept away from the one end orientation of base plate the outside of leg is extended there is the supporting part, the apron with the supporting part is connected, be provided with the through-hole on the leg, through-hole department is provided with the shutoff the polar plate subassembly of through-hole, the polar plate subassembly with a utmost point ear of electric core is connected.

2. The electronic device of claim 1, wherein the pole plate assembly is connected to the surrounding wall in an insulated manner, and the cover plate is welded to the supporting portion.

3. The electronic device of claim 2, wherein the electrode plate assembly comprises an electrode plate body and a lead-out terminal, the electrode plate body is connected with the inner wall of the surrounding wall through the first insulating layer, the lead-out terminal is connected with the electrode plate body, and the lead-out terminal protrudes out of the outer wall of the surrounding wall through the through hole.

4. The electronic device according to claim 3, wherein the lead-out terminal is a composite layer structure, the lead-out terminal comprises an external connection layer and an internal connection layer, the internal connection layer is welded with the plate body, and the internal connection layer is made of the same material as the plate body.

5. The electronic device of claim 4, wherein the plate body is connected to one tab of the battery cell through a connecting band, the other tab of the battery cell is connected to an inner sidewall of the substrate, and the connecting band is made of a material consistent with the corresponding tab.

6. The electronic device according to any of claims 1 to 5, wherein the diameter to thickness ratio of the electronic device is greater than or equal to 2: 1.

7. the electronic device of claim 6, wherein the electronic device has a thickness of less than 10 mm.

8. The electronic device according to any one of claims 1 to 5, wherein the cell is a winding cell, a support pillar is disposed in a middle of the winding cell, and two ends of the support pillar are respectively connected to the cover plate and the substrate.

9. The electronic device as claimed in claim 8, wherein the cover plate has a liquid injection hole, the support post has a liquid guide cavity therein, the support post has an inlet and an outlet communicating with the liquid guide cavity, the inlet communicates with the liquid injection hole, the outlet communicates with the accommodating cavity, and a block is disposed in the liquid injection hole.

10. The electronic device of claim 9, wherein the electrode plate assembly is connected to the surrounding wall in an insulated manner, and the supporting column is made of metal;