CN218827723U

CN218827723U - Current collector sealing cap's battery cell

Info

Publication number: CN218827723U
Application number: CN202221915471.1U
Authority: CN
Inventors: 王宇俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-07
Filing date: 2022-07-25
Publication date: 2023-04-07
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a single battery of a current collector sealing cap, which comprises a shell, a cap, a first current collector, an electric core, a second current collector, an insulating gasket and a bottom plate or a bottom plate sealing ring component; the cover cap is arranged at the opening A end of the shell and is welded on the periphery; flattening the two ends of the battery cell, and respectively attaching and welding the full lugs with the current collecting surfaces of the first current collector and the second current collector; a first current collector end of a combined battery cell welded by a first current collector, a battery cell and a second current collector is arranged in a shell, and a current CID position of a current collecting surface of the first current collector is abutted, attached and welded with a welding surface of a riveting end surface of a cap post; after the insulating gasket is arranged in the shell, a roller groove at the opening of the B end of the shell forms a supporting part; injecting electrolyte into the electric core in the shell; coating high-temperature sealant on two sides of the periphery of the excircle bottom plate, then filling the excircle bottom plate into a shell supporting part, and then filling a bottom plate sealing ring assembly into the shell supporting part, wherein the explosion-proof nicks are outward; and finally, rolling, upsetting and sealing the periphery of the bottom plate coated with the opening of the roller groove at the B end of the shell to form the single battery.

Description

Current collector sealing cap's battery cell

Technical Field

The utility model relates to the technical field of batteries, especially, relate to a mass flow body seals battery cell of block.

Background

Lithium ion batteries are widely used in various industries because of their advantages of low cost, long life, easy recovery, etc. The electric core of common lithium ion battery is coiling type electric core, a utmost point ear all can be drawn forth to every positive plate or negative plate, consequently need weld a plurality of utmost point ears in advance, be connected with utmost point post again, or be connected with utmost point post through the connection piece, the technology is loaded down with trivial details, equipment investment is great, and for convenient welding, utmost point ear extension length is all longer, lead to pole piece foil material also many, the holistic manufacturing cost of battery cell is higher, utmost point ear overcurrent ability is weak, the impedance is big, temperature rise when quick charge-discharge, has the safety risk, be unfavorable for the marketing of new forms of energy electric motor car.

Disclosure of Invention

An object of the utility model is to provide a current collector seals block's battery cell can leave out utmost point ear and utmost point post and be connected required connection piece and welding process, saves pole piece foil material, when simplifying battery cell's manufacturing process, reduction in production cost, and electric core adopts to rub the ability of filling soon, reduce the temperature rise, improve the security performance that flat full utmost point ear effectively promoted the battery simultaneously.

In order to realize the purpose, the following technical scheme is provided:

a single battery with a current collector sealing cap (shown in figure 1) comprises a shell, the cap, a first current collector, a battery core, a second current collector, an insulating gasket and a bottom plate. One end A of the two ends of the shell along the first direction is open, the other end B of the shell is provided with a roller groove, the cover cap is arranged at the end A of the shell opening and the periphery of the cover cap is welded laterally; then, kneading flat full lugs at two ends of the battery cell, and respectively attaching and welding the full lugs with the current collecting surfaces of the first current collector and the second current collector; the first current collector end of the combined battery cell welded by the first current collector, the battery cell and the second current collector is arranged in the shell, and the current CID position of the current collecting surface of the first current collector is abutted and jointed with the welding surface of the riveting end of the cap pole post and then welded; after the insulating gasket is arranged in the shell, a roller groove at the opening of the B end of the shell forms a supporting part; injecting electrolyte into the electric core in the shell; then coating high-temperature sealant on two surfaces of the outer circumference of the bottom plate, and then loading the bottom plate into the shell supporting part, wherein the explosion-proof nicks are outward; and finally, after the opening of the roller groove at the B end of the shell and the outer circumferential edge of the bottom plate are wrapped, upsetting and sealing are carried out, and a single battery is formed.

The battery cell (see figure 2) comprises a winding battery cell rear coating protective film formed by kneading a flat full tab or a first tab, a positive plate, a diaphragm, a negative plate and a flat full tab or a second tab of a positive electrode. A first tab and a second tab are respectively arranged at two ends along the first direction, and the first tab and the second tab are respectively led out from a pole piece foil of the battery cell and are kneaded into flat full tabs; one surface of the first current collector is abutted, attached and welded with the first tab; the second mass flow body the collector face with second utmost point ear butt laminating welding.

Optionally, when the material of the shell is aluminum, the shell is a positive electrode of the battery, and at this time, the cap terminal is a negative electrode of the battery; the first current collector is a negative current collector and is in butt welding with the battery cell negative electrode flat lug; and the second current collector is a positive current collector and is in butt joint welding with the battery cell positive electrode flattening lug.

Optionally, when the casing is made of steel, the casing is a negative electrode of the battery, and the cover plate pole is a positive electrode of the battery; the first current collector is a positive current collector and is in butt welding with the battery cell positive electrode flat lug; and the second current collector is a negative current collector and is in butt welding with the battery core negative electrode rubbing flat lug.

Optionally, the length of the foil leading-out of the positive electrode flattening tab is 1.5-5 mm, and the length of the foil leading-out of the negative electrode flattening tab is 3-8 mm. .

Optionally, the cap 100 is a sealing cap formed by assembling, riveting and welding a pole, an insulator, a cover plate, a conical honey seal ring, an insulating support and a pole pressing plate; the pole is T-shaped, the large end face is upward, and the central pole is downward; the insulator is provided with a center hole and a basin-shaped body with a circular ring at the periphery, the opening of the basin-shaped body is upward, the basin-shaped body is placed in the concave step of the cover plate, and the end face of the insulator is attached to the concave step face of the cover plate; the cover plate is provided with a central concave step, the concave step is provided with a conical hole, and the conical hole is small in upper part and large in lower part so as to accommodate a conical sealing ring; the concave step surface of the cover plate is attached to the end surface of the insulator, and the back convex surface of the cover plate is correspondingly abutted to the concave step surface of the insulating support; the insulating bracket is provided with a central concave step on one surface and a central through hole, the other surface is provided with a circular ring-shaped or latticed opening with a reinforcing rib, the middle concave step is provided with an upward opening, and a CID pressure ring arranged on the periphery of the central hole is provided with a downward opening; the pole pressing plate is provided with a central counter bore, and the counter bore faces downwards and is arranged below the insulating bracket and abutted against the insulating bracket; and the T-shaped pole sequentially penetrates through the insulator, the cover plate, the conical honey seal ring, the insulating support and the pole pressing plate, is riveted and formed into a rear section difference step, and then the pole pressing plate is welded with the circumferential butt joint of the pole in a seam welding manner to form a sealing cap.

Optionally, a liquid injection hole is formed in the cover plate, and a positioning blind hole for fixing the insulating support is formed in the end face of the inner side of the cover plate, so that the liquid injection hole of the cover plate is aligned with the liquid injection avoiding hole of the insulating support.

Optionally, the insulating support is provided with a central through hole, and a CID compression ring arranged on the periphery of the central hole is opened inwards; one side end face of the insulating support is provided with a circular or grid-shaped reinforcing rib with an inward opening; so as to reduce the material consumption and uniformly press the current collector.

Optionally, the insulating support is made of an insulating material which is corrosion-resistant, high-temperature resistant, and elastic according to functional requirements.

Optionally, the conical sealing ring is made of insulating, corrosion-resistant, aging-resistant and high-elasticity fluororubber and is arranged in a conical ring shape with a central hole; the conical sealing ring is positioned in the conical hole of the cover plate and is attached between conical surfaces;

meanwhile, the insulator is arranged between the insulator and the insulating bracket; the conical sealing ring is set to be in a compressed state.

Optionally, the cap 100A is a sealing cap formed by assembling, riveting and welding a pole pressing plate, an insulator, a cover plate, a honey seal ring, an elastic insulating support and a pole; the pole pressing plate is provided with a central counter bore, the counter bore is upward and is arranged in the large circular ring of the insulator, and the other side of the counter bore is abutted against the inner end face of the insulator; the cover plate is provided with a liquid injection hole and a central through hole, the end of the small circular ring of the insulator penetrates through the central hole of the cover plate, and the lower end face of the large circular ring is attached to the upper surface of the cover plate; the elastic insulating bracket is provided with a circular or grid-shaped reinforcing rib and a central through hole, a CID (CID) compression ring arranged on the periphery of the central through hole is provided with a downward opening, and the reinforcing rib is provided with a downward opening; the sealing ring is arranged in a central hole of the elastic insulating bracket, and is arranged in a compression state above the large end of the T-shaped pole and below the cover plate and the insulator; the pole is T-shaped, the large end face faces downwards, the middle of the lower surface of the large end is provided with a welding face, and the central pole faces upwards; the central pole column penetrates through center holes of the honey seal ring, the elastic insulating support, the insulator, the cover plate and the pole column pressing plate respectively, the pole column and the pole column pressing plate are riveted, fixed and formed, and finally the riveted part of the pole column and the counter sink of the pole column pressing plate is welded in a seam welding mode, so that contact impedance is reduced, and therefore a seal cap is formed.

Optionally, a central through hole is arranged on the cover plate to accommodate the small insulator ring; the cover plate is provided with a liquid injection hole, and the inner surface of the cover plate is provided with a positioning blind hole for fixing the elastic insulating bracket; the inner side of the periphery of the cover plate is provided with a leading-in part for entering the shell, so that the cap can be conveniently assembled in the shell.

Optionally, the insulator is arranged in a secondary ring shape, and the large ring is upwards arranged to accommodate the pole pressing plate; the small ring penetrates downwards into the center hole of the cover plate and the lower surface of the connector of the large ring and the lower surface of the connector of the small ring are attached and abutted to the upper surface of the cover plate.

Optionally, the elastic insulating support is provided with a circular ring-shaped or latticed opening with reinforcing ribs inward, so that materials are reduced, uniform pressure is applied to the current collector, the current collector is tightly attached to the cell flattening tab, the overcurrent capacity is improved, the impedance is reduced, and meanwhile, the welding procedure of flattening the tab of the current collector and the cell can be reduced according to the technological process requirement; the elastic insulating support is provided with a central through hole to accommodate the annular sealing ring; and the CID pressure ring arranged on the periphery of the central hole is provided with a downward opening.

Optionally, the sealing ring is made of insulating, corrosion-resistant, aging-resistant and high-elasticity fluororubber and is arranged in a circular ring shape.

Optionally, the first current collector is a metal conductor arranged in a shape of a circular sheet or a circular disk; a current CID welding area is arranged at the center of the disc or the disc; one surface of the current collector is attached to a first tab of the battery cell and then welded, and the other surface of the current CID welding area of the first current collector is welded with a pole of the cap assembly.

Optionally, the current collector 501 (see fig. 5) is a metal conductor with elasticity; the current collector is provided with a central hole and a plurality of special-shaped strip holes; the special-shaped strip holes divide the current collector into a current collecting plane and an elastic sheet; the elastic sheet consists of a great circle and a plurality of convex arcs; after the central hole is aligned with the electric core winding hole, the current collecting surface is attached to the second lug of the electric core and then welded; the elastic sheet of the current collector is abutted against the inner surface of the bottom plate or the inner surface of the bottom of the closed end of the shell.

Optionally, the first current collector and the second current collector are made of a metal conductor material such as aluminum, copper, nickel, stainless steel, and the like, and are correspondingly matched according to different casing materials such as aluminum or steel.

Optionally, the current collector 501 (see fig. 6) is a metal conductor with elasticity; the current collector is provided with a central hole and a plurality of special-shaped strip holes; the special-shaped strip holes divide the current collector into a current collecting plane and an elastic sheet; the elastic sheet is formed by uniformly distributing a plurality of convex circular arcs; the flow collecting plane is a large circular plane; after the central hole is aligned with the electric core winding hole, the current collecting surface is attached to the second lug of the electric core and then welded; the elastic sheet of the current collector is abutted against the inner surface of the bottom plate or the inner surface of the bottom of the closed end of the shell.

Optionally, the current collecting support (see fig. 7) is composed of a large current collecting face and a small current collecting face supported by springs, and is provided with a central through hole; a plurality of fastening positions which are uniformly distributed and used for fixing the springs are arranged on the large current collecting surface so as to clamp and fix the springs; the small current collecting pieces are provided with openings which are uniformly distributed, and are formed by bending an extension material of the large current collecting surface; aligning the central hole of the current collecting support body with the winding hole of the battery cell, attaching the large current collecting surface with a first tab of the battery cell, and then welding; the small current collecting surface of the current collecting support body is abutted against the inner surface of the cap cover plate; the current collecting support is set in a compressed state in the unit cell.

Optionally, the cap (see fig. 9) is formed by combining a cover plate and an explosion-proof valve; a boss is arranged in the middle of the first side face of the cover plate and used as a pole of the battery, and an exhaust hole is formed in the side face of the boss; the second side surface of the cover plate is provided with an explosion-proof valve accommodating area; the first side face of the explosion-proof valve is abutted to the second side face of the cover plate, the first side face is provided with a nick weak area, and the second side face faces the flow collecting support body.

Optionally, the bottom plate (see fig. 10) is a multi-boss disc, and is composed of an inner boss, a middle boss, an outer boss, and an outer circular bottom plate; the internal boss is abutted against the second current collector to protect the intermediate boss, and the second current collector is set to be in a compressed state; the middle boss is arranged between the inner boss and the outer boss, and an explosion-proof nick is arranged on the middle boss to form the integration of an explosion-proof valve and the bottom plate; the outer boss is higher than the middle boss, so that the structural strength of the bottom plate is improved, and meanwhile, the explosion-proof nicks are protected, and foreign objects are prevented from being extruded; when the internal pressure of the battery reaches a set pressure value, the explosion-proof nicks are torn and opened to release pressure, so that the safety of the battery is ensured.

Optionally, the bottom plate sealing ring (see fig. 10) is made of an insulating material and is provided with a hole in the middle in a ring shape, the inner wall of the sealing ring is in coated and abutted contact with the outer periphery of the bottom plate, a protruding fixing rib is arranged on the inner side wall of the sealing ring, the cover plate is prevented from being separated in the cap assembling process, the sealing function is achieved at the same time, a sealing rib is arranged on the inner side of the bottom of the sealing inner ring, the bottom plate enters an opening at the end B of the shell after being arranged in the bottom plate sealing ring, and the battery is sealed after the edge covering and upsetting.

Compared with the prior art, the beneficial effects of the utility model are that:

the single battery provided by the utility model realizes mutual clinging and butting between the positive and negative electrode of the battery cell in the shell and the cap pole, the first current collector, the battery cell, the second current collector, the inner surface of the bottom of the shell or the boss in the bottom plate through the elastic force action of the elastic insulating support and the current collector, thereby omitting the switching piece and the welding process adopted by the switching piece required by the connection of the traditional pole and the shell, and simplifying the production process and the corresponding equipment investment; and because the adapter plate and the welding process are omitted, the extension length of the pole lug can be reduced as much as possible, which is favorable for saving the material of the pole piece foil and reducing the cost; and the battery core is a full lug flattening manufacturing process, the current path is short, the cross section is large, the overcurrent capacity is strong, the temperature rise is low when the battery is charged and discharged quickly, and the quick charging performance and the safety of the battery are effectively improved.

Drawings

Fig. 1 is a cross-sectional view of a single battery according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electrical core in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery cap according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a battery cap according to a second embodiment of the present invention;

fig. 5 is a schematic view of a first current collector structure according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a second current collector in an embodiment of the present invention;

fig. 7 is a schematic structural view of a current-collecting support according to a second embodiment of the present invention;

fig. 8 is a cross-sectional view of a single battery according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of a single battery according to a second embodiment of the present invention;

fig. 10 is a partially enlarged view of fig. 9 at N.

Reference numerals are as follows:

100. capping; 101. a cover plate; 1011. an introduction section; 1012. a concave step; 1013. a conical bore; 10111. an explosion-proof valve; 10112. an exhaust hole; 10113. an explosion-proof valve containment area;

102. an insulating support; 1021. an insulating support positioning portion; 1022. CID (CID) compression rings of the insulating supports;

103. a conical sealing ring;

104. a seal ring;

105. an elastic insulating support; 1051. a positioning portion of the elastic insulating support; 1052. CID (CID) compression rings of the elastic insulating supports;

106. an insulator; 1061. a large circular ring; 1062. a small circular ring;

107. a pole pressing plate; 1071. a countersunk hole; 1072. a step;

108. a pole column; 1081. welding a surface;

201. a current collecting support body; 2011. a central hole of the flow collecting support body; 2012. a large current collecting surface; 2013. a small flow collecting surface; 2014. Buckling; 2015. a spring;

301. an insulating spacer;

400. an electric core; 401. a protective film; 402. a diaphragm; 403. kneading and flattening the lug on the positive electrode; 404. a positive plate; 405. a negative plate; 406. kneading and flattening the cathode and the tab; 407. a winding hole;

501. a second current collector; 5011. a flow collecting surface; 5012. a current-collecting spring plate; 5013. a current collector central hole; 5014. special-shaped strip holes; 502. a first current collector; 5021. current CID;

601. a housing; 6011. A support groove; 6012. a support portion;

701. explosion-proof nicking;

801. a bottom plate seal ring;

901. a base plate; 9011. an outer boss; 9012. an internal boss; 9013. a middle boss; 9014. the excircle of the bottom plate;

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the product of the present invention is usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood as a specific case by 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.

The first direction defines: for a cylindrical battery, the first direction here refers to the axial direction of the housing 601; for a rectangular battery, the first direction here refers to the height or length direction of the case 601

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions, and wherein the same or similar elements or elements having the same or similar functions are interchangeable structural combinations throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The first embodiment is as follows:

a single battery with a current collector sealing cap (see fig. 8) includes a case 601, a second current collector 501, a battery core 400, a first current collector 502, and a cap 100. One end A of the two ends of the shell along the first direction is open, and the other end of the shell is closed; flattening the whole tabs 403 and 406 at the two ends of the battery cell, and respectively attaching and welding the tabs with the current collecting surfaces 5011 of the first current collector and the second current collector; then, welding a first current collector end of a combined battery cell formed by welding the first current collector 501, the battery cell 400 and the second current collector 501 with the lower large end surface of the cap T-shaped pole 108 in an abutting and aligning manner; welding the cap 100 and the combined battery cell to form a cap battery cell assembly; finally, a second current collector elastic sheet 5012 of the cap battery cell assembly is arranged in the shell and is abutted against the inner surface of the bottom of the shell; the second current collector elastic sheet 5012 is arranged to be in close contact with the inner surface of the bottom of the shell in a compressed state; an anti-explosion notch 701 is arranged outside the closed end of the shell and forms an integrated anti-explosion valve with the shell 601, when the internal pressure of the battery rises to a set value, the anti-explosion notch on the closed end of the shell is opened to release pressure, and explosion risks are eliminated; the shell opening is abutted with the cap leading-in part and then welded at the periphery; and after the electrolyte is injected from the liquid injection hole of the cap, the liquid injection hole of the cap is closed, and the single battery is formed.

Example two:

alternatively, the current collector sealing capped single battery (see fig. 9) comprises a shell 601, a cap 100, a current collecting support body 201, a battery core 400, a second current collector 501, an insulating gasket 301, a bottom plate sealing ring 801 and a bottom plate 901. One end A of the two ends of the shell 601 in the first direction is open, and the other end B of the shell is provided with a roller groove; then, the two ends of the battery cell are kneaded to be flat, and the full tabs 403 and 406 are respectively attached to and welded with the large current collecting surface of the current collecting support body and the current collecting surface 5011 of the second current collector; installing the current collecting support body end of the combined battery cell welded with the current collecting support body 201, the battery cell 400 and the second current collector 501 into the shell, and enabling the small current collecting surface 2013 of the current collecting support body to be abutted and attached to the inner end surface of the cap cover plate; then, after the insulating gasket 301 is arranged in the shell 601, a roller groove at the opening of the B end of the shell forms a supporting part; injecting electrolyte into the battery cell in the shell 601; then, the bottom base plate is arranged in the base plate ring-shaped sealing ring 801, and the inner wall of the ring-shaped sealing ring 801 is coated with a base plate excircle 9014 to form a base plate sealing ring assembly; then, the bottom plate sealing ring assembly is installed in the shell supporting part 6012, and the bottom plate explosion-proof score 701 faces outwards; and finally, covering the periphery of the bottom plate sealing ring assembly with the opening of the roller groove at the B end of the shell, and then upsetting and sealing to form the single battery.

Further, the cap (see fig. 9) is formed by combining a cover plate 101 and an explosion-proof valve 10111; a boss serving as a lead-in part 1011 of the battery is arranged in the middle of the first side surface of the cover plate, and an exhaust hole 10112 is formed in the side surface of the boss; the second side surface of the cover plate is provided with an explosion-proof valve accommodating area 10113; the first side face of the explosion-proof valve 10111 is abutted against the surface of the cover plate explosion-proof valve accommodating area 10113, the first side face of the explosion-proof valve 10111 is provided with a nick weak area, and the second side face faces the flow collecting support body 201 and is attached to and abutted against the small flow collecting face 2013.

Further, the current collecting support 201 (see fig. 7) is composed of a large current collecting face 2012 and a small current collecting face 2013 which are supported by springs, and is provided with a current collecting support center hole 2011; a plurality of buckling positions 2014 which are used for fixing the springs and are uniformly distributed are arranged on the large current collecting surface so as to clamp and fix the springs 2015; the small current collecting sheets 2013 are provided with openings which are uniformly distributed, and are formed by bending an extension material of the large current collecting face 2012; after aligning the current collecting support body center hole 2011 with the battery cell 400 winding hole 407, attaching the large current collecting face 2012 to the flat electrode lug of the battery cell 400, and then welding; the small current collecting surface 2013 of the current collecting support body 201 is abutted with the inner surface of the cap cover plate 101; the current collecting support 201 is set in a compressed state in the unit cell.

Further, the bottom plate 901 (see fig. 1, 9, and 10) is a dish with multiple concentric bosses, and is composed of an inner boss 9012, a middle boss 9013, an outer boss 9011, and a bottom plate outer circle 9014; the inner boss 9012 is abutted to the second current collector 501 current collecting elastic sheet 5012 to protect the middle boss 9013, and the second current collector 501 is set to be in a compressed state; the middle boss 9013 is arranged between the inner boss 9012 and the outer boss 9011, and is provided with an explosion-proof notch 701 to form an explosion-proof valve and the bottom plate 901; the outer boss 9011 is higher than the middle boss 9013, so that the structural strength of the bottom plate 901 is improved, and the explosion-proof notch 701 is protected to prevent foreign objects from being extruded; when the internal pressure of the battery reaches a set pressure value, the explosion-proof nick 701 is torn and opened to release the pressure, so that the safety of the battery is ensured.

Furthermore, in (fig. 1), after high-temperature sealant is coated on two sides of an excircle 9014 of a bottom plate of the bottom plate 901, the two sides are installed in a supporting portion 6012 of the shell 601, and the explosion-proof score 701 faces outwards; and finally, covering the periphery 9014 of the bottom plate with the opening of the roller groove at the B end of the shell 601, and then rolling, upsetting and sealing to form a single battery.

Further, (fig. 9 and 10) the bottom plate 901 is installed in the bottom plate ring annular sealing ring 801, and the bottom plate outer circle 9014 is abutted, attached and coated by the inner annular wall of the bottom plate sealing ring 801 to form a bottom plate sealing ring assembly; then, the bottom plate 901 sealing ring 801 assembly is installed in the supporting part 6012 of the shell 601, and the bottom plate explosion-proof notch 701 faces outwards; and finally, covering the opening of the roller groove at the B end of the shell 601 with the outer circumference of the bottom plate sealing ring assembly, and then rolling, upsetting and sealing to form a single battery.

Further, the current collecting support 201 is made of a metal conductor material such as copper, aluminum, nickel, stainless steel, etc. according to different structures of the single battery.

Further, one end a of two ends of the housing 601 (see fig. 8) in the first direction is open, and the other end is closed; an explosion-proof notch 701 is arranged outside the closed end of the shell 601 and forms an integrated explosion-proof valve with the shell 601, when the internal pressure of the battery rises to a set value, the explosion-proof notch on the closed end of the shell 601 is opened 701 to release pressure, and explosion risks are eliminated.

It is noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied, and those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A single battery of a current collector sealing cap comprises a shell (601), a cap (100), a current collecting support body (201), a first current collector (502), an electric core (400), a second current collector (501), an insulating gasket (301), a bottom plate (901) or a bottom plate sealing ring (801); the method is characterized in that: the shell (601) is a cup-shaped shell with a single opening and the other closed end along the first direction, or the end A of one of the two ends along the first direction is open, and the end B of the other end is open; firstly, covering the cap (100) on the end A of the opening of the shell (601) and welding the periphery of the end A laterally; then, respectively attaching and welding a positive electrode flat-kneading lug (403) and a negative electrode flat-kneading lug (406) at two ends of the battery core (400) with current collecting surfaces (5011) of the first current collector (502) and the second current collector (501); installing the end of the first current collector (502) of the combined battery cell, which is welded by the first current collector (502), the battery cell (400) and the second current collector (501), into the shell (601), and welding the current CID (5021) on the back of the current collecting surface of the first current collector (502) and the welding surface (1081) of the riveting end surface of the terminal post (108) of the cap (100) after abutting joint; after the insulating gasket (301) is installed in the shell, a supporting part (6012) is formed in a roller groove (6011) at the B end of the shell (601); injecting electrolyte into the battery core in the shell (601); coating high-temperature sealant on two sides of the excircle (9014) of the bottom plate, and then loading the bottom plate into a supporting part (6012) of the shell (601); or an assembly of the bottom plate sealing ring (801) wrapping the bottom plate excircle (9014) is installed in the shell supporting part, and the explosion-proof notch (701) is outward; finally, covering the periphery of the bottom plate excircle (9014) or bottom plate sealing ring (801) component with an opening of a roller groove (6011) at the B end of the shell (601), and then rolling, upsetting and sealing to form a single battery;

the battery cell comprises a winding battery cell consisting of a positive electrode rubbing flat lug (403), a positive electrode sheet (404), a diaphragm (402), a negative electrode sheet (405), a negative electrode rubbing flat lug (406), a protective film (401) and a winding hole (407); and a positive electrode flattening lug (403) and a negative electrode flattening lug (406) are respectively arranged at two ends along the first direction.

2. The cell according to claim 1, wherein: the cap (100) is assembled, riveted and welded by a pole (108), an insulator (106), a cover plate (101), a conical sealing ring (103), an insulating support (102) and a pole pressing plate (107) to form a sealing cap; the pole (108) is T-shaped, the large end face of the pole faces upwards, and the welding face (1081) of the central pole faces downwards; the insulator (106) is provided with a center hole and a basin-shaped body with a circular ring (1061) at the periphery, the opening of the basin-shaped body is upward, the basin-shaped body is placed in the concave step of the cover plate (101), and the end face of the insulator (106) is attached to the concave step face of the cover plate (101); a central concave step is arranged on the cover plate (101), a conical hole (1013) is arranged on the concave step, and the conical hole (1013) is small in top and big in bottom so as to accommodate a conical sealing ring (103); the concave step surface of the cover plate (101) is attached to the end surface of the insulator, and the back convex surface of the cover plate is correspondingly abutted to the concave step surface of the insulating support; the insulating support (102) is provided with a central concave step on one surface and a central through hole, the other surface is provided with a circular ring or grid-shaped opening with reinforcing ribs, the opening of the middle concave step is upward, and the opening of the insulating support CID press ring (1022) arranged on the periphery of the central hole is downward; a central counter bore (1071) is formed in the pole pressing plate (107), faces downwards, is arranged below the insulating support (102) and is abutted with the insulating support; and (2) the T-shaped pole (108) sequentially penetrates through the insulator (106), the cover plate (101), the conical sealing ring (103), the insulating support (102) and the pole pressing plate (107) and then is subjected to riveting forming to form a pole step (1072) between the lower part of the step of the pole pressing plate (107) and the welding surface (1081) of the pole (108), and then the pole pressing plate (107) and the joint of the pole step (1072) are welded to form a sealing cap.

3. The cell according to claim 2, wherein: the conical sealing ring (103) is insulating, corrosion-resistant, aging-resistant and high-elasticity fluororubber and is arranged into a conical ring shape with a central hole; the conical sealing ring (103) is positioned in the conical hole (1013) of the cover plate (101) and is attached between the conical surfaces; between the insulator (106) and the insulating support (102); the conical sealing ring (103) is set to be in a compressed state.

4. The single battery according to claim 1, characterized in that the cap (100) is a sealed cap formed by riveting and welding after assembling a pole pressing plate (107), an insulator (106), a cover plate (101), a circular sealing ring (104), an elastic insulating bracket (105) and a pole (108); a central counter bore (1071) is arranged on the pole pressing plate (107), the counter bore is upward and is arranged in the large circular ring (1061) of the insulator (106), and the other surface of the counter bore is abutted against the inner end surface of the insulator (106); the insulator (106) is provided with a large circular ring (1061) and a small circular ring (1062) which are in a secondary ring shape, and a connecting body between the large circular ring and the small circular ring; the cover plate (101) is provided with a liquid injection hole (109) and a central through hole, the end of the small circular ring (1062) penetrates through the central hole of the cover plate (101), and the lower end face of the large circular ring is attached to the upper surface of the cover plate; the elastic insulating support (105) is provided with a circular or grid-shaped reinforcing rib and a central through hole, and an opening of a CID (1052) pressing ring of the elastic insulating support and an opening of the reinforcing rib which are arranged on the periphery of the central through hole are downward; the annular sealing ring (104) is arranged in a central hole of the elastic insulating support (105), and is arranged in a compression state above the large end of the T-shaped pole (108) and below the cover plate (101) and the small circular ring (1062); the pole (108) is T-shaped, a welding surface (1081) abutted with the first current collector (502) is arranged in the middle of the downward large end surface, and the central pole is upward; the central pole column penetrates through the center holes of the circular ring-shaped sealing ring (104), the elastic insulating support (105), the insulator (106), the cover plate (101) and the pole column pressing plate (107) respectively, then the pole column (108) is fixedly formed by riveting the pole column pressing plate (107), and finally the pole column (108) is welded with the riveting position of the counter sink (1071) of the pole column pressing plate in a seam welding mode, so that contact resistance is reduced, and a sealing cap is formed.

5. The cell according to claim 1, characterized in that: the first current collector (502) is a metal conductor arranged in a shape of a circular sheet or a circular disc; a current CID (5021) welding area is arranged at the central position of the disk or disc; one surface of the first current collector (502) is jointed and welded with the anode flattening lug (403) of the battery core (400), and the other surface of the current CID (5021) welding area of the first current collector (502) is jointed and welded with the pole welding surface (1081) of the cap assembly.

6. The cell according to claim 1, wherein: the second current collector (501) is a metal conductor with elasticity; the second current collector (501) is provided with a current collector central hole (5013) and a plurality of special-shaped strip holes (5014); the second current collector (501) is cut into a current collecting surface (5011) and a current collecting elastic sheet (5012) by the special-shaped strip holes (5014); the current collecting elastic sheet (5012) is formed by a great circle and a plurality of convex arcs; after the current collector central hole (5013) is aligned with the winding hole (407) of the battery cell (400), the current collecting face (5011) is attached to the second lug of the battery cell (400) and then welded; a current collecting elastic sheet (5012) of the current collector (501) is abutted against the surface of an inner boss (9012) of the bottom plate (901) or the inner surface of the bottom of the closed end of the shell (601); the second current collector (501) is a metal conductor with elasticity; a current collector central hole (5013) and a plurality of special-shaped strip holes (5014) are formed in the second current collector (501); the special-shaped strip holes (5014) cut the current collector into a current collecting face (5011) and a current collecting elastic sheet (5012); the current collecting elastic sheet (5012) is formed by uniformly distributing a plurality of convex arcs; the surface of the flow collecting surface (5011) is a large circular surface.

7. The cell according to claim 1, characterized in that: the current collecting support body (201) is composed of a large current collecting face (2012) and a small current collecting face (2013) which are supported by springs, and is provided with a current collecting support body center hole (2011); a plurality of buckling positions (2014) which are used for fixing springs (2015) and are uniformly distributed are arranged on the large collecting surface (2012) so as to clamp the springs (2015); the small collecting face (2013) is provided with openings which are uniformly distributed, and the small collecting face is formed by bending an extension material of the large collecting face (2012); aligning the central hole (2011) of the current collecting support body with the winding hole (407), then jointing the large current collecting face (2012) with the positive electrode flattening lug (403) of the battery core (400), and then welding; the small current collecting surface (2013) of the current collecting support body (201) is abutted with the inner surface of the cap cover plate; the current collecting support (201) is arranged in a compressed state in the cell.

8. The cell according to claim 1, characterized in that: the bottom plate (901) is in a disc shape with multiple concentric bosses and consists of an inner boss (9012), a middle boss (9013), an outer boss (9011) and a bottom plate excircle (9014); the inner boss (9012) is abutted with the current collecting elastic sheet (5012) of the second current collector (501) to protect the middle boss (9013), and the second current collector (501) is set to be in a compressed state; the middle boss (9013) is arranged between the inner boss (9012) and the outer boss (9011), and an explosion-proof notch (701) is arranged on the middle boss to form an explosion-proof valve and the bottom plate (901); the outer boss (9011) is higher than the middle boss (9013), so that the structural strength of the bottom plate (901) is improved, and meanwhile, the explosion-proof notches (701) are protected, and foreign objects are prevented from being extruded; when the internal pressure of the battery reaches a set pressure value, the explosion-proof nick (701) is torn and opened to release pressure, so that the safety of the battery is ensured.

9. The cell according to claim 1, characterized in that: coating high-temperature sealant on two sides of the excircle (9014) of the bottom plate (901), and then loading the bottom plate excircle into a supporting part (6012) of the shell (601), wherein the explosion-proof nicks (701) are outward; finally, covering the opening of the roller groove at the B end of the shell (601) with the bottom plate excircle (9014) for edge covering, and then rolling, upsetting and sealing to form a single battery; or the bottom plate (901) is arranged in the bottom plate sealing ring (801), and the excircle (9014) of the bottom plate is abutted, attached and coated by the inner wall of the ring sleeve of the bottom plate sealing ring (801) to form a bottom plate sealing ring component; then the assembly of the bottom plate (901) and the bottom plate sealing ring (801) is installed into a supporting part (6012) of the shell (601), and the anti-explosion score (701) faces outwards; and finally, covering the opening of the roller groove at the B end of the shell (601) on the outer circumferential edge of the bottom plate sealing ring (801) assembly, and then rolling, upsetting and sealing to form the single battery.

10. The cell according to claim 1, wherein: when the material of the shell (601) is aluminum, the shell (601) is a battery anode, and at the moment, the cap (100) pole (108) is a battery cathode; the first current collector (502) is a negative current collector and is abutted and welded with a flat kneading lug (406) of the negative electrode of the battery cell (400); the second current collector (501) is a positive current collector and is abutted and welded with a positive flat lug (403) of the battery cell (400);

when the shell (601) is made of steel, the shell (601) is a battery cathode, and at the moment, the pole (108) of the cover plate (101) is a battery anode; the first current collector (502) is a positive current collector and is abutted and welded with the positive flat lug (403) of the battery cell (400); the second current collector (501) is a negative current collector and is abutted and welded with a flat kneading lug (406) of the negative electrode of the battery core (400).