CN212571084U - Storage battery - Google Patents

Storage battery Download PDF

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Publication number
CN212571084U
CN212571084U CN202022203175.6U CN202022203175U CN212571084U CN 212571084 U CN212571084 U CN 212571084U CN 202022203175 U CN202022203175 U CN 202022203175U CN 212571084 U CN212571084 U CN 212571084U
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negative
positive
current collecting
plate
welding
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许祎凡
娄豫皖
张朋
黄伟东
孟祎凡
李紫璇
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Suzhou Yuan'an Energy Technology Co.,Ltd.
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Shanghai Binei Information Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The utility model relates to a storage battery belongs to battery technical field. The storage battery comprises a hollow metal shell, a plurality of cylindrical current-collecting winding cores, an upper cover plate assembly and a lower cover plate assembly, wherein the upper cover plate assembly and the lower cover plate assembly seal openings at two ends of the metal shell; the cylindrical current-collecting winding core comprises a metal tube, a cylindrical winding core, a positive current-collecting disc, a negative current-collecting cap and a negative guard ring; the empty foil area of the positive plate of the cylindrical winding core is shaped into a cross shape, and the empty foil in the cross-shaped area is welded with the positive current collecting disc; shaping the empty foil area of the negative plate into a designed shape, and welding the empty foil on the edge of the designed shape with the negative current collecting cap; a plurality of positive current collecting plates are welded with the positive current collecting plates, and the positive current collecting plates are welded with the positive cover plate; the negative current collecting cap is welded with the negative current collecting piece, and the negative current collecting piece is welded with the negative cover plate. The welding of the negative foil and the current collector is carried out by adopting ultrasonic welding instead of laser welding, so that the generation of welding slag is reduced, the consistency of the battery is greatly improved, and the self-discharge and short-circuit risks of the battery are reduced.

Description

Storage battery
Technical Field
The utility model relates to a battery, in particular to structure of battery belongs to battery technical field.
Background
As is well known, compared with a small-capacity battery, a large-capacity battery has the disadvantages of high processing difficulty, low yield, high cost, difficult heat dissipation, poor rate performance, short cycle life and poor safety. In order to reduce the internal resistance of the battery and improve the power performance, the high-capacity cylindrical battery usually adopts a full-lug design, and the diversion is realized in a laser welding and confluence plate welding mode although the structures and the shapes of the end faces of the full lugs are different. According to patent CN110600795A, tabs are arranged at two ends of a winding core, one end is a positive electrode tab, the other end is a negative electrode tab, and the end surface of the winding core tab is an annular step surface; the current collecting discs of the positive electrode and the negative electrode are provided with circular grooves which are welding areas; and the annular step surface on the tab is attached to the annular groove on the current collecting disc for welding. And a positive current collecting plate is welded at the vibration level of the positive end face of the patent CN204947019U, and a negative current collecting plate is welded at the vibration level of the negative end face. In patent CN204927432U, the optical foil area of the negative plate is welded to one end of the negative current guiding disk, and the other end of the negative current guiding disk is welded to the bottom of the casing. Patent CN203481318U is through cutting out uncoated district pole piece, and the electric connection of utmost point ear and apron of being convenient for can effectively prevent rosin joint, the phenomenon of impaling. The structure of these patents can only realize the welding of the full tab end face and the current collecting plate by laser welding. Because the welding slag of the laser welding process is inevitably splashed, the welding slag is difficult to clean, and the self-discharge can be increased after the welding slag enters the battery, even the short circuit is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a battery and manufacturing method thereof. The storage battery comprises a hollow metal shell with openings at two ends, a plurality of cylindrical current-collecting winding cores arranged in the metal shell, and an upper cover plate assembly and a lower cover plate assembly which are respectively arranged at two ends of the metal shell and seal the openings at two ends of the metal shell; the upper cover plate assembly comprises a negative cover plate, a negative insulation bracket, a negative bus bar and a negative insulation heat conducting bar; the lower cover plate component comprises a positive cover plate, a positive insulating bracket and a positive bus bar; the cylindrical current-collecting winding core comprises a metal tube, a cylindrical winding core, a positive current-collecting disc, a negative current-collecting cap and a negative guard ring; the cylindrical winding core is of a multilayer winding structure formed by winding a diaphragm, a positive plate, a diaphragm, a negative plate and a diaphragm in sequence; the positive plate empty foil area and the negative plate empty foil area are respectively positioned at two ends of the cylindrical winding core; one side of the positive plate is a positive plate coating area coated with a positive material, and the other side of the positive plate is a blank positive plate foil area; one side of the negative plate is a negative plate coating area coated with a negative material, and the other end of the negative plate is a blank negative plate empty foil area; the positive plate empty foil area and the negative plate empty foil area are respectively positioned at two ends of the cylindrical winding core, the positive plate empty foil area is shaped into a cross shape, and the empty foil in the cross-shaped area is welded with the positive current collecting disc; shaping the empty foil area of the negative plate into a designed shape, and welding the empty foil at the edge of the designed shape with the negative current collecting cap; a plurality of positive current collecting plates are welded with the positive current collecting plates, and the positive current collecting plates are welded with the positive cover plate; and the negative electrode current collecting caps are welded with the negative electrode current collecting pieces, and the negative electrode current collecting pieces are connected with the negative electrode cover plate.
The utility model relates to a storage battery, which comprises a metal shell, a plurality of cylindrical current-collecting winding cores, an anode cover plate, a cathode cover plate, an anode current-collecting sheet, a cathode current-collecting sheet, an anode insulating bracket and a cathode insulating bracket;
the empty foil area of the positive plate at the positive end of the cylindrical winding core is shaped into a cross shape and is welded with the positive current collecting disc into a whole through laser welding; putting the cylindrical winding core into the metal tube in a direction that the anode faces the bottom of the metal tube;
the design shape of the shaping of the negative plate empty foil area at the negative end of the cylindrical winding core can be rectangular or circular, and is not limited to the types; the remaining edge empty foil area after the shaping of the negative electrode end of the winding core is a plurality of arc areas or a circle. Sleeving a negative electrode retainer at the negative electrode end of the cylindrical winding core, and supporting and positioning the negative electrode retainer by the upper edge of the metal tube; then a negative current collecting cap is put on the negative guard ring, so that the lower edge of the current collecting cap is embedded into the guard ring groove for positioning; then the hollow foil area at the edge of the designed shape is compressed and welded with the inner wall of the negative current collecting cap through ultrasonic welding, and the welding shape is arc;
the positive current collecting sheet is welded with the welding surface of the positive current collecting disc of the cylindrical current collecting winding core and the annular bottom surface of the metal pipe one by one; then placing a positive electrode insulating bracket above or below the confluence sheet; welding the positive pole confluence piece with the positive pole cover plate;
the negative current collecting sheet is welded with the welding surface of the negative current collecting cap of the cylindrical current collecting winding core one by one; then placing a negative electrode insulation bracket and a negative electrode insulation heat-conducting fin above the current-collecting plate; then the negative pole afflux sheet is connected with the negative pole cover plate, and the connection mode can adopt the mode of combining welding, riveting and welding and riveting;
the welding surface of the negative current collecting cap is the upper surface or the arc-shaped side surface of the current collecting cap.
The positive terminal of the battery can also be manufactured by the same method as the negative terminal.
The positive current collecting plate, the positive current collecting sheet and the metal tube with the bottom are made of the same material; the negative current collecting cap and the negative current collecting plate are made of any one or two metal materials of copper, copper alloy, copper nickel plating, carbon steel, nickel and nickel alloy.
The utility model discloses the inside cylinder of battery rolls up the core and comprises the positive negative pole of same system, for example lithium iron phosphate-graphite rolls up the core, lithium manganate-graphite rolls up the core, nickel cobalt lithium manganate-graphite rolls up the core, lithium cobaltate-lithium titanate rolls up the core, lithium manganate-lithium titanate rolls up the core, ultracapacitor system rolls up any one of the chemical power source such as core, cadmium-nickel roll up the core, zinc-nickel roll up the core, and does not confine to above-mentioned system.
Simultaneously the utility model discloses the inside cylinder of battery rolls up the core and can make up with the book core of different material systems, for example lithium manganate-graphite rolls up the core combination with nickel cobalt lithium manganate-graphite rolls up the core combination, the super capacitor of power type rolls up the core and the lithium ion of the energy type of like anode material rolls up the core combination etc.. Two types of cylindrical winding cores with different characteristics are connected in parallel to form a high-capacity battery, so that the performance is improved, and the cost is reduced.
It should be noted that, different battery systems are suitable for different types of metals, which belongs to the known technology in the industry, for example, lithium ion batteries adopt aluminum as the material of the metal housing and the metal tube, and the anode matrix of the cylindrical winding core is aluminum foil, and the cathode matrix is copper foil; for example, super capacitors and batteries using lithium titanate as a negative electrode material adopt aluminum as a material of a metal shell and a metal tube, and the positive electrode and the negative electrode substrates of a cylindrical roll core are both aluminum foils; stainless steel or other materials can also be used as the material of the metal shell and the metal tube.
The processing method of the storage battery comprises the following steps:
(1) arranging a positive electrode material layer on one side of a positive electrode plate of the positive electrode plate to form a positive electrode plate coating area, and leaving a blank on the other side to form a positive electrode plate blank area;
(2) arranging a negative electrode material layer on one side of a negative electrode plate of the negative electrode plate to form a negative electrode plate coating area, and leaving a blank on the other side to form a negative electrode plate blank area;
(3) winding the positive plate, the negative plate and the diaphragm according to the sequence of the diaphragm, the positive plate, the diaphragm, the negative plate and the diaphragm to form a cylindrical winding core, and respectively reserving a positive plate empty foil area and a negative plate empty foil area at two ends of the cylindrical winding core;
(4) shaping the empty foil area of the positive plate at the positive end of the cylindrical winding core into a cross shape, and welding the empty foil area of the positive plate and the positive current collecting plate into a whole through laser welding; putting the cylindrical winding core into the metal tube in a direction that the anode faces the bottom of the metal tube;
(5) shaping the empty foil area of the negative plate at the negative end of the cylindrical winding core into a designed shape, sleeving a negative guard ring at the negative end of the cylindrical winding core, and supporting and positioning by the upper edge of the metal tube; then a negative current collecting cap is put on the negative guard ring, so that the lower edge of the current collecting cap is embedded into the guard ring groove for positioning; then the hollow foil area at the edge of the designed shape is compressed and welded with the inner wall of the negative current collecting cap through ultrasonic welding, and the welding shape is arc;
(6) welding the positive current collecting sheet with the welding surface of the positive current collecting disc of the cylindrical current collecting winding core and the annular bottom surface of the metal pipe one by one; welding the negative current collecting sheet and the welding surface of the negative current collecting cap of the cylindrical current collecting winding core one by one; forming a cylindrical winding core group;
(7) assembling the welded cylindrical winding core into a metal shell;
(8) then placing a positive electrode insulating bracket above or below the positive electrode bus bar; welding the positive pole confluence piece with the positive pole cover plate;
(9) the metal shell and the anode cover plate are welded in a sealing way;
(10) a negative electrode insulation bracket and a negative electrode insulation heat-conducting fin are arranged above the negative electrode bus bar; then the negative pole afflux sheet is connected with the negative pole cover plate in a welding, riveting or welding and riveting combined mode;
(11) welding the negative cover plate and the metal shell in a sealing way;
(12) baking the battery, injecting electrolyte, forming and sealing.
The application has the following technical effects and advantages:
the welding of the negative foil and the current collector is carried out by adopting ultrasonic welding instead of laser welding, so that the generation of welding slag can be reduced, the consistency of the battery is greatly improved, and the self-discharge and short-circuit risks of the battery are reduced.
Drawings
Fig. 1 is an exploded view of the battery of the present invention.
Fig. 2 is a perspective view of the battery of the present invention.
Fig. 3 is the installation schematic diagram of the positive, negative and insulating frames of the storage battery of the present invention.
Fig. 4a-4e are schematic diagrams illustrating welding of the negative bus bar of the storage battery according to the present invention.
Fig. 5 is a schematic diagram of the welding of the positive bus bar of the storage battery of the present invention.
Fig. 6a-6b are exploded views of a cylindrical current collecting core according to the present invention.
Fig. 7 is a cross-sectional view of a cylindrical current collecting core of the present invention.
Fig. 8a-8b are schematic diagrams illustrating the welding of the negative end of the cylindrical current collecting winding core according to the present invention.
Fig. 9 is a schematic diagram of the positive terminal welding of the cylindrical current collecting winding core of the present invention.
Fig. 10 is a schematic view of the end-shaping of the cross-shaped groove of the positive electrode of the present invention.
Fig. 11a-11b are schematic diagrams of the end shaping of the present invention to form a rectangular groove and a circular groove in the middle of the negative electrode.
Fig. 12a-12e are schematic diagrams of the negative bus bar of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the drawing, 1 is an upper cover plate, 2 is a negative insulation heat conduction sheet, 3 is a negative bus bar (including five types 3a-3 e), 4 is a negative insulation frame, 5 is a metal shell, 6 is a cylindrical current collecting core, 7 is a positive insulation frame, 8 is a positive bus bar, 9 is a lower cover plate, 11 is a negative pole column, 12 is a liquid injection port, 13 is a positive pole column, 14 is an explosion-proof valve, 31-35 are welding positions of the negative bus bar and the negative current collecting cap, 61 is a core body, 62 is a metal pipe, 63 is a negative current collecting cap (including 63a and 63 b), 64 is a retainer, 65 is a positive current collecting sheet, 631 is a welding position of the negative current collecting cap and a foil, 632 is a welding position of the negative current collecting cap and a bus bar, 633 is a welding position of the negative current collecting cap and a bus bar, 651 is another welding position of the positive current collecting cap and a foil, 652 is a welding position of the positive current collecting cap and a bus bar, and 81 is the welding position of the positive current collecting sheet and the negative current collecting cap, and 82 is the welding position of the positive current collecting sheet.
As shown in the figure, the utility model discloses an overall technical scheme of battery does: the device comprises a hollow metal shell 5 with openings at two ends, a plurality of cylindrical current-collecting winding cores 6 arranged in the metal shell 5, and an upper cover plate assembly and a lower cover plate assembly which are respectively arranged at two ends of the metal shell 5 and seal the openings at two ends of the metal shell 5; the upper cover plate component comprises a negative cover plate 1, a negative insulation heat-conducting fin 2, a negative insulation support 4 and a negative bus bar 3 (comprising five forms 3a-3 e); the lower cover plate component comprises an anode cover plate 9, an anode insulating bracket 7 and an anode bus bar 8; the cylindrical current collecting winding core 6 comprises a metal tube 62, a cylindrical winding core (body) 61, a positive current collecting disc (sheet) 65, a negative current collecting cap 63 (divided into 63a and 63 b) and a negative guard ring 64; the cylindrical winding core (body) 61 is a multilayer winding structure formed by winding a diaphragm, a positive plate, a diaphragm, a negative plate and a diaphragm in sequence; the positive plate empty foil area and the negative plate empty foil area are respectively positioned at two ends of the cylindrical roll core (body) 61; one side of the positive plate is a positive plate coating area coated with a positive material, and the other side of the positive plate is a blank positive plate foil area; one side of the negative plate is a negative plate coating area coated with a negative material, and the other end of the negative plate is a blank negative plate empty foil area; the positive plate empty foil area and the negative plate empty foil area are respectively positioned at two ends of the cylindrical winding core (body) 61, the positive plate empty foil area is shaped into a cross shape, and the empty foils in the cross-shaped area are welded with the positive current collecting disc 65; shaping the empty foil area of the negative plate into a rectangle, and welding empty foils on two sides of the rectangle with the negative current collecting cap 63; the positive current collecting plates 65 are welded with the positive current collecting plates 8, and the positive current collecting plates 8 are welded with the positive cover plate 9; the negative electrode current collecting caps 63a are welded with the negative electrode current collecting sheets 3a or 3e, and the negative electrode current collecting sheets 33a or 3e are connected with the negative electrode cover plate 1. In another mode, a plurality of negative electrode collecting caps 63b are welded with the negative electrode collecting pieces 3b or 3c or 3d, and the negative electrode collecting pieces 3b or 3c or 3d are connected with the negative electrode cover plate 1.
The utility model relates to a storage battery, which comprises a metal shell 5, a plurality of cylindrical current-collecting winding cores 6, an anode cover plate 9, a cathode cover plate 1, an anode bus bar 8, a cathode bus bar 3 (containing five forms of 3a-3 e), an anode insulating bracket 7, a cathode insulating heat-conducting bar 2 and a cathode insulating bracket 4; the empty foil area of the positive plate at the positive end of the cylindrical winding core (body) 61 is shaped into a cross shape and is welded with the positive current collecting disc 65 into a whole through laser welding; and the cylindrical winding core (body) 61 is put into the metal tube 62 with the positive electrode facing the bottom of the metal tube; the empty foil area of the negative electrode sheet at the negative end of the cylindrical winding core (body) 61 is shaped into a rectangle, a negative electrode retainer 64 is sleeved at the negative end of the cylindrical winding core (body) 61 and is supported and positioned by the upper edge of the metal tube 62; then, a negative current collecting cap 63 is put on the negative guard ring 64, so that the lower edge of the current collecting cap 63 is embedded into the guard ring groove for positioning; then the empty foil areas at the two sides of the rectangle are compressed and welded with the inner wall 631 of the negative current collecting cap 63 through ultrasonic welding; the welding surface 652 of the positive collecting sheet 8 and the positive collecting tray 65 of the cylindrical collecting core 6 and the annular bottom surface of the metal tube 62 are welded one by one; then, placing the anode insulating bracket 7 above the bus bar 8; then welding the positive pole confluence piece 8 and the positive pole cover plate 9; the negative current collecting sheets 3a or 3e are welded with the welding surface 632 of the negative current collecting cap 63 of the cylindrical current collecting winding core 6 one by one; in another mode, the negative current collecting sheets 3b, 3c or 3d are welded with the welding surface 633 of the negative current collecting cap 63 of the cylindrical current collecting winding core 6 one by one; then, a negative electrode insulating bracket 4 is placed above the bus bar 3; then connecting the negative pole confluence piece 3 with the negative pole cover plate 1; the positive terminal of the battery can also be manufactured by the same method as the negative terminal.
The positive current collecting plate, the positive current collecting sheet and the metal tube with the bottom are made of the same material; the negative current collecting cap and the negative current collecting plate are made of any one or two metal materials of copper, copper alloy, copper nickel plating, carbon steel, nickel and nickel alloy.
The utility model discloses the inside cylindrical mass flow of battery rolls up the core and comprises the positive negative pole of same system, for example lithium iron phosphate-graphite rolls up the core, lithium manganate-graphite rolls up the core, lithium nickel cobalt manganese acid lithium-graphite rolls up the core, lithium cobaltate-lithium titanate rolls up the core, lithium manganate-lithium titanate rolls up the core, ultracapacitor system rolls up any one of the chemical power source such as core, cadmium-nickel roll core, zinc-nickel roll core, just does not confine to above-mentioned system.
Simultaneously the utility model discloses the inside cylinder of battery rolls up the core and can make up with the book core of different material systems, for example lithium manganate-graphite rolls up the core combination with nickel cobalt lithium manganate-graphite rolls up the core combination, the super capacitor of power type rolls up the core and the lithium ion of the energy type of like anode material rolls up the core combination etc.. Two types of cylindrical winding cores with different characteristics are connected in parallel to form a high-capacity battery, so that the performance is improved, and the cost is reduced.
It should be noted that, different battery systems are suitable for different types of metals, which belongs to the known technology in the industry, for example, lithium ion batteries adopt aluminum as the material of the metal housing and the metal tube, and the anode matrix of the cylindrical winding core is aluminum foil, and the cathode matrix is copper foil; for example, super capacitors and batteries using lithium titanate as a negative electrode material adopt aluminum as a material of a metal shell and a metal tube, and the positive electrode and the negative electrode substrates of a cylindrical roll core are both aluminum foils; stainless steel or other materials can also be used as the material of the metal shell and the metal tube.
The utility model discloses a large capacity battery, as shown in fig. 1 explosion chart, including upper cover plate 1, negative pole insulation conducting strip 2, negative pole convergent current piece 3 (containing five kinds of forms of 3a-3 e), negative pole insulation frame 4, metal casing 5, cylindrical mass flow roll core 6, anodal insulation frame 7, anodal convergent current piece 8, lower cover plate 9. As shown in fig. 2, the perspective view of the present invention shows that negative poles 11, liquid injection holes 12, positive poles 13, and explosion-proof valves 14 are distributed on the upper cover plate 1. As shown in fig. 6a-6b, the cylindrical current collecting winding core of the present invention includes a winding core (body) 61 with two ends shaped, an aluminum tube 62, a negative current collecting cap 63a or 63b, a retainer 64, and a positive current collecting piece 65.
Winding a winding core with copper and aluminum foil at two ends, shaping the positive and negative ends of the winding core into a positive cross-shaped groove and a negative middle rectangular groove according to the figure 10 and the figures 11a-11 b.
The roll cores with shaped ends, the retainer 64 and the current collecting cap 63 are placed in the negative electrode, and the foil material at the negative electrode end and the current collecting cap position 631 shown in figures 8a-8b are subjected to ultrasonic welding. The positive electrode cross slot is filled with the positive electrode current collecting piece 65, and the positive electrode end foil and current collecting piece position 651 or 652 shown in fig. 9 is laser welded. An aluminum pipe 62 is placed, and the bottom edge of the aluminum pipe 62 is laser welded with the edge of the positive current collecting plate 65.
In fig. 3, a positive insulating frame 7 and a negative insulating frame 4 are respectively arranged at two ends of a cylindrical current collecting winding core 6.
Fig. 4a-4e illustrate the welding of the negative bus bar of the storage battery according to the present invention, wherein the welding position 31 of the negative bus bar is laser welded to the welding position 632 of the negative current collecting cap.
Fig. 12a-12e show 5 types of bus bar structures, and the other welding between the header cap 63 and the bus bars 3b, 3c, 3d is ultrasonic welding with a circular arc shape, and the bus bars corresponding to 32, 33, 34 shown in fig. 4a-4e are welded to the point 633 shown in fig. 8a-8 b.
Fig. 5 shows the welding schematic diagram of the positive bus bar of the storage battery according to the present invention, which is laser-welded to the positive bus bar welding position 81 and the positive collector welding position 652.
And (3) installing the metal shell 5, and welding the lower cover plate 9 and the positive bus bar sheet 8, such as a positive bus bar sheet welding position 82 in the figure 5.
And putting the heat-conducting insulating plate 2, and sealing and laser welding the upper cover plate 1 and the lower cover plate 9 with the metal shell 5 respectively.
Above-mentioned the utility model discloses a processing method of large capacity battery includes following step:
(1) arranging a positive electrode material layer on one side of a positive electrode plate of the positive electrode plate to form a positive electrode plate coating area, and leaving a blank on the other side to form a positive electrode plate blank area;
(2) arranging a negative electrode material layer on one side of a negative electrode plate of the negative electrode plate to form a negative electrode plate coating area, and leaving a blank on the other side to form a negative electrode plate blank area;
(3) winding the positive plate, the negative plate and the diaphragm according to the sequence of the diaphragm, the positive plate, the diaphragm, the negative plate and the diaphragm to form a cylindrical winding core, and respectively reserving a positive plate empty foil area and a negative plate empty foil area at two ends of the cylindrical winding core;
(4) shaping the empty foil area of the positive plate at the positive end of the cylindrical winding core into a cross shape, and welding the empty foil area of the positive plate and the positive current collecting plate into a whole through laser welding; putting the cylindrical winding core into the metal tube in a direction that the anode faces the bottom of the metal tube;
(5) shaping the empty foil area of the negative plate at the negative end of the cylindrical winding core into a designed shape, sleeving a negative guard ring at the negative end of the cylindrical winding core, and supporting and positioning by the upper edge of the metal tube; then a negative current collecting cap is put on the negative guard ring, so that the lower edge of the current collecting cap is embedded into the guard ring groove for positioning; then the hollow foil area with the designed shape is compressed and welded with the inner wall of the negative current collecting cap through ultrasonic welding, and the welding shape is arc; thus forming a cylindrical current collecting winding core;
(6) welding the positive current collecting sheet with the welding surface of the positive current collecting disc of the cylindrical current collecting winding core and the annular bottom surface of the metal pipe one by one; welding the negative current collecting sheet and the welding surface of the negative current collecting cap of the cylindrical current collecting winding core one by one; forming a cylindrical winding core group;
(7) assembling the welded cylindrical winding core into a metal shell;
(8) then placing an anode insulating support above the anode bus bar; welding the positive pole confluence piece with the positive pole cover plate;
(9) the metal shell and the anode cover plate are welded in a sealing way;
(10) placing a negative electrode insulating support above the negative electrode bus bar; welding the negative bus bar with the negative cover plate;
(11) welding the negative cover plate and the metal shell in a sealing way;
(12) baking the battery, injecting electrolyte, forming and sealing.
Example 1:
according to the method for manufacturing the battery, 10 lithium iron phosphate 5Ah positive electrode-graphite negative electrode winding cores (with the diameter of 26mm and the height of 73mm) are manufactured into a 3.2V50Ah battery by the processing method. The battery is 2I at 25 DEG C1When the current is continuously discharged, the temperature difference between the center of the battery and the outer surface is less than or equal to 3 ℃; the maximum temperature rises of the positive pole column, the negative pole column and the outer surface of the battery are respectively 10 ℃, 9 ℃ or 8 ℃; the battery is placed for 28 days at 25 ℃, and the charge is kept over 97.5 percent; the battery is not ignited, not exploded and not burnt when being pricked.
Example 2:
in the lithium battery capable of outputting large current, 5 6Ah lithium nickel cobalt manganese oxide positive electrodes-graphite negative electrode winding cores (with the diameter of 26mm and the height of 66mm) are manufactured into a 3.6V30Ah battery by the processing method. The battery is 2I at 25 DEG C1When the current is continuously discharged, the temperature difference between the center of the battery and the outer surface is less than or equal to 3 ℃; the maximum temperature rises of the positive pole column, the negative pole column and the outer surface of the battery are respectively 9 ℃, 8 ℃ or 7 ℃;the electric battery is placed for 28 days at the temperature of 25 ℃, and the charge is kept above 96.5%; the battery puncture test did not catch fire, explode, and burn.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims (7)

1. The storage battery is characterized by comprising a hollow metal shell with openings at two ends, a plurality of cylindrical current collecting winding cores arranged in the metal shell, and an upper cover plate assembly and a lower cover plate assembly which are respectively arranged at two ends of the metal shell and seal the openings at two ends of the metal shell; the upper cover plate assembly comprises a negative cover plate, a negative insulation support, a negative insulation heat conducting sheet and a negative bus bar; the lower cover plate assembly comprises a positive cover plate, a positive insulating support and a positive bus bar; the cylindrical current-collecting winding core comprises a metal tube, a cylindrical winding core body, a positive current-collecting disc, a negative current-collecting cap and a negative guard ring; the cylindrical winding core body is of a multilayer winding structure formed by winding a diaphragm, a positive plate, a diaphragm, a negative plate and a diaphragm in sequence; the positive plate empty foil area and the negative plate empty foil area are respectively positioned at two ends of the cylindrical roll core body; one side of the positive plate is a positive plate coating area coated with a positive material, and the other side of the positive plate is a blank positive plate foil area; one side of the negative plate is a negative plate coating area coated with a negative material, and the other end of the negative plate is a blank negative plate empty foil area; the empty foil area of the positive plate is in a shape of a cross, and the empty foil in the cross area is connected with the positive current collecting plate in a welding mode; the negative plate hollow foil area is in a shaped design shape, and the hollow foil on the edge of the design shape is connected with the negative current collecting cap in a welding mode; the positive current collecting plates are connected with the positive cover plate in a welding manner; the negative pole current collecting caps are connected with the negative pole current collecting pieces in a welding mode, and the negative pole current collecting pieces are connected with the negative pole cover plate.
2. The battery of claim 1, wherein the positive plate empty foil area at the positive end of the cylindrical roll core body is welded with the positive current collecting plate into a whole by laser welding; and the anode is arranged in the metal tube in the direction towards the bottom of the metal tube.
3. The accumulator according to claim 1, characterized in that the design shape of the shaping of the negative plate empty foil region can be rectangular, circular and is not limited to these types; the remaining edge empty foil area after the shaping of the negative electrode end of the winding core is a plurality of arc areas or a circle.
4. The battery of claim 1, wherein the negative retainer is fitted over the negative end of the cylindrical wound core and is held in place by the upper edge of the metal tube; a negative electrode current collecting cap is arranged on the negative electrode retainer, so that the lower edge of the current collecting cap is embedded into the retainer groove for positioning; and pressing the hollow foil areas on the edges of the designed shape together, and welding the hollow foil areas and the vertical wall of the negative current collecting cap together in an ultrasonic welding mode, wherein the welding shape is arc.
5. The accumulator according to claim 1 or 2, characterized in that the positive collector plate is welded with the welding surface of the positive collector plate of the cylindrical collector core and the annular bottom surface of the metal tube one by one; an anode insulating bracket is arranged on the upper side or the lower side of the bus bar; the positive pole afflux sheet and the positive pole cover plate are connected together in a welding mode.
6. The accumulator according to claim 1, 3 or 4, characterized in that the negative collector plate is welded with the welding surface of the negative collector cap of the cylindrical collector core in a one-by-one manner; a negative electrode insulation bracket and a negative electrode insulation heat-conducting fin are arranged above the confluence sheet; the negative pole afflux sheet is connected with the negative pole cover plate together, and the connection mode can adopt the mode of combining welding, riveting and welding and riveting.
7. The battery of claim 1, 3 or 4, wherein the negative current collecting cap welding surface is an upper surface or an arc-shaped side surface of the current collecting cap.
CN202022203175.6U 2020-09-30 2020-09-30 Storage battery Active CN212571084U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022203175.6U CN212571084U (en) 2020-09-30 2020-09-30 Storage battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022203175.6U CN212571084U (en) 2020-09-30 2020-09-30 Storage battery

Publications (1)

Publication Number Publication Date
CN212571084U true CN212571084U (en) 2021-02-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022203175.6U Active CN212571084U (en) 2020-09-30 2020-09-30 Storage battery

Country Status (1)

Country Link
CN (1) CN212571084U (en)

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