Novel cylindrical power supply

Abstract

The utility model discloses a novel cylindrical power supply which comprises an aluminum shell, the bottom end of the aluminum shell is provided with an anode column hole, the lower end and the upper end of the aluminum shell are respectively provided with an anode busbar and a cathode busbar, the top end of the aluminum shell is provided with a cover plate, the cover plate is provided with a cathode column hole, and the anode column hole is provided with a cathode column hole. Insulating pads are arranged between the positive busbar and the bottom of the aluminum shell and between the negative busbar and the cover plate, a roll core is arranged in the aluminum shell, and an insulating film is arranged outside the roll core. Compared with the prior art, the novel cylindrical power supply has the advantages that the filling space of electrolyte can be increased, the purpose of prolonging the cycle life of a battery is achieved, laser welding is adopted for the positive pole and the positive pole hole in the bottom of the aluminum shell, laser welding is adopted for the negative pole and the negative pole hole in the cover plate, pier pressing is not needed, and the cost is reduced. And the space utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the chemical power supply technology and the capacitor technology, in particular to a novel cylindrical power supply. Background Art

[0002] Cylindrical chemical power sources and capacitors use winding to manufacture the core, and this winding core manufacturing scheme has the advantage of high production efficiency; the existing technology has the following problems: the battery shell is a steel shell, and the negative electrode side needs to be rolled and pressed, resulting in low battery space utilization; the winding tension of the positive electrode sheet, negative electrode sheet, and diaphragm is large during the winding process, and there is no gap between the positive electrode sheet, negative electrode sheet, and diaphragm, which makes it difficult to inject liquid into the battery, resulting in a short battery cycle life. Therefore, we propose a new cylindrical power source. Utility Model Content

[0003] The main purpose of the utility model is to provide a novel cylindrical power supply, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new cylindrical power supply, including an aluminum shell, a positive pole column hole is opened at the bottom end of the aluminum shell, a positive pole bus and a negative pole bus are respectively arranged at the lower end and the upper end of the aluminum shell, a cover plate is arranged at the top end of the aluminum shell, a negative pole column hole is opened on the cover plate, insulating pads are arranged between the positive pole bus and the bottom of the aluminum shell, and between the negative pole bus and the cover plate, a winding core is arranged inside the aluminum shell, and an insulating film is arranged outside the winding core.

[0005] As a further description of the above technical solution, the positive bus includes a positive electrode sheet, a positive electrode column is fixedly connected to the bottom end of the positive electrode sheet, the positive electrode column is adapted to the positive electrode column hole and laser welding is adopted, and a plurality of positive bus channels and a plurality of current limiting holes are evenly opened on the positive electrode sheet.

[0006] As a further description of the above technical solution, the negative bus includes a negative electrode sheet, a negative electrode column is fixedly connected to the top of the negative electrode sheet, a plurality of negative electrode bus channels are evenly opened on the negative electrode sheet, and a sealing rubber sleeve is fixedly connected to the negative electrode column.

[0007] As a further description of the above technical solution, the negative electrode column is adapted to the negative electrode column hole and is laser welded. The negative electrode column adopts a copper-aluminum composite electrode, and the sealing rubber sleeve is a sealant or fluororubber resistant to electro-liquid corrosion.

[0008] As a further description of the above technical solution, the cover plate includes a cover plate aluminum ring, on which an injection hole, a pole through hole and an explosion-proof valve hole are opened, an explosion-proof plate and an explosion-proof patch are fixedly installed in the explosion-proof valve hole, a pole plastic ring is fixedly connected in the pole through hole, a pole aluminum ring is fixedly connected to the inner side of the pole plastic ring, a rubber nail is arranged in the injection hole, and an aluminum nail is fixedly welded at the opening of the injection hole.

[0009] As a further description of the above technical solution, the cover aluminum ring is fixedly connected to the top of the aluminum shell, the pole plastic ring is an injection molded part made of nano-grade thermoplastic resin, and the cover aluminum ring and the pole aluminum ring are fixedly connected through an injection molding process, the negative pole hole is opened on the pole aluminum ring, and a number of nanoholes are opened on the cover aluminum ring and the pole aluminum ring.

[0010] As a further description of the above technical solution, the insulating pad includes an insulating pad body, which is an elastic insulating pad made of ceramic fiber cotton or PP fiber cotton or organic microporous material, and a center hole is opened on the insulating pad body. Insulating pad channels are evenly opened on the insulating pad body, and the center hole is compatible with both the positive electrode column and the negative electrode column.

[0011] As a further description of the above technical solution, the winding core includes a first electrode, a second electrode, an inner diaphragm, an outer diaphragm and a weld mark. The first electrode, the inner diaphragm, the second electrode and the outer diaphragm overlap in sequence, and the overlapping first electrode, the inner diaphragm, the second electrode and the outer diaphragm are wound themselves, the first electrode is in the inner layer, the insulating film is fixedly wound on the outside of the outer diaphragm, and the inner diaphragm and the outer diaphragm are both coated with ammonium carbonate, ammonium bicarbonate or ethylene carbonate.

[0012] As a further description of the above technical solution, the first electrode includes a first electrode ear, a first electrode conductive material is arranged on the first electrode ear, a plurality of first grooves are opened on the first electrode conductive material, a plurality of first holes are opened on the first electrode ear, a ceramic layer is fixedly connected to the bottom end of the first electrode ear, a first electrode active material layer is fixedly connected to the bottom end of the ceramic layer, a plurality of concave and convex points are fixedly connected to the first electrode active material layer, and a first weld mark is arranged between the first electrode conductive material and the first electrode ear.

[0013] As a further description of the above technical solution, the second electrode includes a second electrode ear, a second electrode conductive material is arranged on the second electrode ear, a plurality of second grooves are opened on the second electrode conductive material, a plurality of second holes are opened on the second electrode ear, a second electrode active material layer is fixedly connected to the bottom end of the second electrode ear, and a second weld mark is arranged between the second electrode conductive material and the second electrode ear.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] By arranging a positive busbar, a negative busbar, an insulating pad, a winding core, an insulating film, an aluminum shell, a cover plate, and aluminum nails and rubber nails, the concave and convex points arranged on the first electrode can increase the distance between the first electrode and the negative electrode sheet; the inner and outer diaphragms are coated with ammonium carbonate, ammonium bicarbonate or ethylene carbonate (EC). In the battery baking process, the presence of the ammonium carbonate, ammonium bicarbonate or ethylene carbonate (EC) coating can increase the distance between the first electrode and the negative electrode sheet, thereby increasing the filling space of the electrolyte, thereby achieving the purpose of improving the battery cycle life, and the positive electrode column and the positive electrode column hole at the bottom of the aluminum shell are laser welded, and the negative electrode column and the negative electrode column hole on the cover plate are laser welded, and no piercing is required, thereby improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a new cylindrical power supply of the utility model;

[0017] Figure 2 This is a schematic diagram of the positive busbar structure of a cylindrical power supply of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the negative busbar of a cylindrical power supply of the utility model;

[0019] Figure 4 This is a schematic diagram of the insulating pad structure of a cylindrical power supply of the utility model;

[0020] Figure 5 This is a schematic diagram of the busbar welding structure of a cylindrical power supply of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of an insulating film and insulating gasket of a cylindrical power supply of the utility model;

[0022] Figure 7 This is a schematic diagram of the aluminum shell structure of a cylindrical power supply of the utility model;

[0023] Figure 8 This is a schematic diagram of the positive pole assembly structure of a cylindrical power supply of the utility model;

[0024] Fig. 9 This is a schematic diagram of the cover structure of a cylindrical power supply of the utility model;

[0025] Fig.10 This is a schematic diagram of the assembly structure of the cover plate aluminum shell of a cylindrical power supply of the utility model;

[0026] Fig.11 This is a schematic diagram of the sealing nail and the rubber nail structure of a cylindrical power supply of the utility model;

[0027] Fig.12 This is a schematic diagram of the winding core structure of a cylindrical power supply of the utility model;

[0028] Fig.13 This is a schematic diagram of the first electrode structure of a cylindrical power supply of the utility model;

[0029] Fig.14 This is a schematic diagram of the second electrode structure of a cylindrical power supply of the utility model;

[0030] Fig.15 This is a schematic diagram of the structure of the first electrode welding portion of a cylindrical power supply of the utility model;

[0031] Fig.16 This is a schematic structural diagram of the welding portion of the second electrode of a cylindrical power supply of the utility model;

[0032] Fig.17 It is a schematic diagram of the welding structure of a cylindrical power supply of the utility model;

[0033] Fig.18 A cross-sectional view of the conductive material structure of the first electrode of a cylindrical power supply of the utility model;

[0034] Fig.19 The utility model is a cross-sectional view of the conductive material structure of the second electrode of a cylindrical power supply.

[0035] In the figure: 100, positive busbar; 200, negative busbar; 300, insulating pad; 400, winding core; 500, insulating film; 600, aluminum shell; 700, cover plate; 800, aluminum nail; 900, rubber nail; 101, positive electrode sheet; 102, positive busbar channel; 103, positive electrode column; 104, current limiting hole; 201, negative electrode sheet; 202, negative busbar channel; 203, sealing rubber sleeve; 204, negative electrode column; 301, insulating pad body; 302, insulating pad channel; 303, center hole; 401, first electrode; 402, second electrode; 403, inner diaphragm; 404, outer diaphragm; 601, positive column hole; 701, cover plate aluminum ring; 702, column plastic Material ring; 703, injection hole; 704, pole aluminum ring; 705, negative pole hole; 706, plastic under the cover; 707, explosion-proof plate; 708, pole through hole; 709, explosion-proof patch; 40101, first electrode active material layer; 40102, ceramic layer; 40103, first electrode ear; 40104, concave and convex points; 40105, first hole; 40106, first electrode conductive material; 40107, first weld mark; 40108, first groove; 40201, second electrode active material layer; 40202, second electrode ear; 40203, second hole; 40204, second electrode conductive material; 40205, second weld mark; 40206, second groove. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features and purpose effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1-19 The utility model provides a technical solution: a new cylindrical power supply, including an aluminum shell 600, a positive pole hole 601 is opened at the bottom of the aluminum shell 600, such as Figure 7 As shown, the positive electrode column hole 601 can be divided into two types, wherein (a) is a circular hole, and (b) is a stepped circular hole. The lower end and the upper end of the aluminum shell 600 are respectively provided with a positive electrode bus 100 and a negative electrode bus 200. The positive electrode bus 100 includes a positive electrode sheet 101. The bottom end of the positive electrode sheet 101 is fixedly connected with a positive electrode column 103. The positive electrode column 103 is adapted to the positive electrode column hole 601 and is laser welded. A plurality of positive electrode bus channel channels 100 are evenly opened on the positive electrode sheet 101. 2 and a plurality of current limiting holes 104, the negative bus 200 includes a negative electrode sheet 201, a negative electrode column 204 is fixedly welded on the top of the negative electrode sheet 201, the negative electrode column 204 adopts a copper-aluminum composite electrode column, the negative electrode column 204 is adapted to the negative electrode column hole 705, and is laser welded, a plurality of negative electrode bus channels 202 are evenly opened on the negative electrode sheet 201, and a sealing rubber sleeve 203 is fixedly connected to the negative electrode column 204, and the sealing rubber sleeve 203 is a sealant or fluororubber resistant to electro-liquid corrosion.

[0040] The top of the aluminum shell 600 is provided with a cover plate 700, and the cover plate 700 includes a cover plate aluminum ring 701, which is fixedly welded to the top of the aluminum shell 600, and the cover plate aluminum ring 701 is provided with a liquid injection hole 703, a pole through hole 708 and an explosion-proof valve hole, and the pole through hole 708 is located in the central area of ​​the cover plate aluminum ring 701, and an explosion-proof disk 707 and an explosion-proof patch 709 are fixedly installed in the explosion-proof valve hole, and a pole through hole 708 is fixedly connected to the pole through hole 708. A pole plastic ring 702 is connected, and a pole aluminum ring 704 is fixedly connected to the inner side of the pole plastic ring 702. A plurality of nano-holes are opened on the cover aluminum ring 701 and the pole aluminum ring 704, which are not shown in the drawings. The pole plastic ring 702 is an injection molded part made of nano-grade thermoplastic resin, and the cover aluminum ring 701 and the pole aluminum ring 704 are fixedly connected by an injection molding process. A negative pole hole 705 is opened on the pole aluminum ring 704, such as Fig. 9 As shown, the negative electrode column hole 705 can be a circular hole or a stepped circular hole. The negative electrode column hole 705 is compatible with the negative electrode column 204 and is fixedly connected by laser welding. A glue nail 900 is arranged in the injection hole 703, and an aluminum nail 800 is fixedly welded at the opening of the injection hole 703.

[0041] Insulating pads 300 are arranged between the positive bus 100 and the bottom of the aluminum shell 600, and between the negative bus 200 and the cover plate 700. The insulating pads 300 include an insulating pad body 301. The insulating pad body 301 is an elastic insulating pad made of ceramic fiber cotton, PP fiber cotton or organic microporous material. A center hole 303 is opened on the insulating pad body 301. Insulating pad channels 302 are evenly opened on the insulating pad body 301. The center hole 303 is compatible with the positive electrode column 103 and the negative electrode column 204.

[0042] A winding core 400 is arranged in the aluminum shell 600, and the winding core 400 includes a first electrode 401, a second electrode 402, an inner separator 403, an outer separator 404 and a weld 405. The inner separator 403 and the outer separator 404 are coated with ammonium carbonate or ammonium bicarbonate or ethylene carbonate (EC). In the battery baking process, the presence of the ammonium carbonate, ammonium bicarbonate or ethylene carbonate (EC) coating can increase the distance between the first electrode 401 and the negative electrode sheet 201, thereby increasing the filling space of the electrolyte, thereby achieving the purpose of improving the battery cycle life. The first electrode 401, the inner separator 403, the outer separator 404, and the weld 405 are coated with ammonium carbonate or ammonium bicarbonate or ethylene carbonate (EC). 3. The second electrode 402 and the outer separator 404 overlap in sequence, and the overlapped first electrode 401, the inner separator 403, the second electrode 402 and the outer separator 404 are wound around themselves, the first electrode 401 is in the inner layer, the insulating film 500 is fixedly wound around the outside of the outer separator 404, and the inner separator 403 and the outer separator 404 are both coated with ammonium carbonate, ammonium bicarbonate or ethylene carbonate (EC). The presence of the ammonium carbonate or ammonium bicarbonate or ethylene carbonate (EC) coating can increase the distance between the first electrode 401 and the negative electrode sheet 201, thereby increasing the filling space of the electrolyte.

[0043] The first electrode 401 includes a first electrode ear 40103. The first electrode ear 40103 can be a cathode or an anode. A first electrode conductive material 40106 is disposed in the first electrode ear 40103. The first electrode conductive material 40106 can be welded and filled on both sides of the first electrode ear 40103, or can be welded and filled on one side of the first electrode ear 40103. The first electrode conductive material 40106 can be higher than the first electrode ear 40103 by 30 to 5 mm, or lower than the first electrode ear 40103 by 30 to 5 mm. 10mm or flush with the first electrode ear 40103, the first electrode conductive material 40106 is a strip structure with a width of 0.5-10mm and a thickness of 0.05-2mm. The length can be shorter than the first electrode ear 40103, or longer than the first electrode ear 40103 or the same length. The first electrode ear 40103 is provided with a plurality of first holes 40105 by laser or hardware mold. The shape of the first hole 40105 can be rectangular, circular, elliptical or other shapes. The area of ​​the first hole 40105 is 0.5-50mm 2The spacing of the first holes 40105 may be fixed or not. The setting of the first holes 40105 is conducive to the electrolyte entering the winding core and the gas inside the winding core being discharged. The bottom end of the first electrode ear 40103 is fixedly connected to the ceramic layer 40102. The setting of the ceramic layer 40102 is used to enhance the insulation effect. The bottom end of the ceramic layer 40102 is fixedly connected to the first electrode active material layer 40101. The first electrode active material layer 40101 is fixedly connected to a plurality of concave and convex points 40104. The setting of the concave and convex points 40104 allows a certain space to be left between the first electrode active material layer 40101 and the adjacent winding layers after winding. A first weld mark 40107 is arranged between the first electrode conductive material 40106 and the first electrode ear 40103. The first electrode conductive material 40106 is welded to the first electrode ear 40103 by laser, ultrasonic wave or pressure fusion welding, which may be continuous welding or discontinuous welding.

[0044] The second electrode 402 includes a second electrode ear 40202. The second electrode ear 40202 can be a cathode or an anode. When the second electrode ear 40202 is an anode, the first electrode ear 40103 is a cathode. When the second electrode ear 40202 is a cathode, the first electrode ear 40103 is an anode. A second electrode conductive material 40204 is provided on the second electrode ear 40202. The second electrode conductive material 40204 can be welded and filled on both sides of the second electrode ear 40202 or welded and filled on one side of the second electrode ear 40202. The second electrode conductive material 40204 can be higher than the second electrode ear 402020~ 5mm, or 20-10mm lower than the second electrode ear 4020 or flush with the second electrode ear 40202, the second electrode conductive material 40204 is a strip structure, with a width of 0.5-10mm, a thickness of 0.05-2mm, and a length that is shorter than the second electrode ear 40202, or longer than the second electrode ear 40202 or the same length, and a plurality of second holes 40203 are opened on the second electrode ear 40202 by laser or hardware mold, and the shape of the second hole 40203 can be rectangular, circular, elliptical or other shapes, and the area of ​​the second hole 40203 is 0.5-50mm 2 The spacing of the second holes 40203 may be fixed or not. The setting of the second holes 40203 is conducive to the electrolyte entering the winding core and the gas inside the winding core being discharged. The bottom end of the second electrode ear 40202 is fixedly connected with the second electrode active material layer 40201. A second weld mark 40205 is arranged between the second electrode conductive material 40204 and the second electrode ear 40202. The second electrode conductive material 40204 is welded to the second electrode ear 40202 by laser, ultrasonic or pressure fusion welding, which may be continuous welding or discontinuous welding.

[0045] Here, the first electrode 401, the second electrode 402, the inner separator 403 and the outer separator 404 are wound into a winding core, and after the winding is completed, the outermost first electrode conductive material 40106 is welded with the adjacent inner first electrode conductive material 40106 or the first electrode ear 40103 by laser, and the outermost second electrode conductive material 40204 is welded with the adjacent inner second electrode conductive material 40204 or the second electrode ear 40202 by laser after the winding is completed. Fig.17 As shown, after the winding of the winding core 400 is completed, a plurality of weld marks 405 are welded at the top and bottom ends of the winding core 400 by laser, and then the first electrode 401, the second electrode 402, the inner diaphragm 403 and the outer diaphragm 404 are fixed by an insulating film 500.

[0046] Core assembly example 1

[0047] Taking solid-state lithium battery as an example, the cathode of the battery can refer to Figure 3 Set the ceramic layer 40102, you can also refer to Figure 4 No ceramic layer 40102 is provided, and the anode is Figure 4 No ceramic layer 40102 is provided, and Figure 3 The first electrode 401 shown is used as a cathode embodiment of a battery: the first electrode ear 40103 is made of aluminum foil, the first electrode conductive material 40106 is an aluminum strip structure, and a plurality of first holes 40105 are opened in the first electrode ear 40103 of the first electrode 401 by laser or hardware mold. The lower edge of the first hole 40105 is 3 to 4 mm away from the upper edge of the first electrode active material layer 40101, and the cross-section of the first hole 40105 is 3 mm 2 The first holes 40105 may be distributed at equal intervals or at unequal intervals; Figure 5 The first electrode conductive material 40106 has a width of 1 mm and a thickness of 1.3 mm. The first electrode conductive material 40106 is roll-welded to a single side of the first electrode ear 40103 along the first welding mark 40107 by an ultrasonic roll welder. The distance from the outer edge of the first electrode conductive material 40106 to the outer edge of the first electrode ear 40103 is 0 mm. After welding, the material is rolled up. Figure 4 The second electrode ear 40202 is made of copper foil, and the second electrode conductive material 40204 is an aluminum strip structure. A plurality of second holes 40203 are opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201. The second hole 40203 has an area of ​​3 mm 2 The second holes 40203 may be distributed at equal intervals or at unequal intervals; Figure 6 The second electrode conductive material 40204 has a width of 1 mm and a thickness of 1.3 mm. The second electrode conductive material 40204 is roll-welded to a single side of the second electrode ear 40202 along the second weld mark 40205 by an ultrasonic roll welder. The distance from the outer edge of the second electrode conductive material 40204 to the outer edge of the second electrode ear 40202 is 0 mm. After welding, the material is rolled up. Figure 2 The first electrode 401, the second electrode 402, the inner separator 403 and the outer separator 404 are wound, the edge of the second electrode 402 covers the edge of the first electrode active material layer 40101 of the first electrode 401 by at least 0.5 mm, and the inner separator 403 and the outer separator 404 cover the edge of the second electrode 402 by 1 to 2 mm; Figure 1 After the winding is completed, the insulating film 500 is attached to fix the second electrode 402, the first electrode 401, the inner separator 403 and the outer separator 404.

[0048] Example 2

[0049] Taking sodium ion battery as an example, the cathode of the battery can refer to Figure 3 Set the ceramic layer 40102, you can also refer to Figure 4 Without setting the ceramic layer 40102, the anode reference of the battery Figure 3 The ceramic layer 40102 is not provided. Figure 3 The first electrode 401 shown is used as a cathode embodiment of a battery: the first electrode ear 40103 is made of aluminum foil, the first electrode conductive material 40106 is an aluminum strip structure, a first hole 40105 is opened in the first electrode ear 40103 of the first electrode 401 by laser or hardware mold, the lower edge of the first hole 40105 is 3 to 4 mm away from the upper edge of the first electrode active material layer 40101, and the first hole 40105 has an area of ​​3 mm 2 The first holes 40105 may be distributed at equal intervals or at unequal intervals; Figure 5 The first electrode conductive material 40106 has a width of 1 mm and a thickness of 1.3 mm. The first electrode conductive material 40106 is roll-welded to a single side of the first electrode ear 40103 along the first welding mark 40107 by an ultrasonic roll welder. The distance from the outer edge of the first electrode conductive material 40106 to the outer edge of the first electrode ear 40103 is 0 mm. After welding, the material is rolled up. Figure 4The second electrode ear 40202 is made of aluminum foil, and the second electrode conductive material 40204 is an aluminum strip structure. A second hole 40203 is opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201. The second hole 40203 has an area of ​​3 mm 2 The second holes 40203 may be distributed at equal intervals or at unequal intervals; Figure 6 The second electrode conductive material 40204 has a width of 1 mm and a thickness of 1.3 mm. The second electrode conductive material 40204 is roll-welded to a single side of the second electrode ear 40202 along the second weld mark 40205 by an ultrasonic roll welder. The distance from the outer edge of the second electrode conductive material 40204 to the outer edge of the second electrode ear 40202 is 0 mm. After welding, the material is rolled up. Figure 2 The first electrode 401, the second electrode 402, the inner separator 403 and the outer separator 404 are wound, the edge of the second electrode 402 covers the edge of the first electrode active material layer 40101 of the first electrode 401 by at least 0.5 mm, and the inner separator 403 and the outer separator 404 cover the edge of the second electrode 402 by 1 to 2 mm; Figure 1 After the winding is completed, an insulating film 500 is attached to fix the second electrode 402, the first electrode 401, the inner separator 403 and the outer separator 404.

[0050] Example 3

[0051] Taking sodium ion battery as an example, the cathode of the battery can refer to Figure 3 Set the ceramic layer 40102, you can also refer to Figure 4 No ceramic layer 40102 is provided, and the anode is Figure 4 The ceramic layer 40102 is not provided. Figure 3 The first electrode 401 shown is used as a cathode embodiment of a battery: the first electrode ear 40103 is made of aluminum foil, the first electrode conductive material 40106 is an aluminum strip structure, a first hole 40105 is opened in the first electrode ear 40103 of the first electrode 401 by laser or hardware mold, the lower edge of the first hole 40105 is 3 to 4 mm away from the upper edge of the first electrode active material layer 40101, and the first hole 40105 has an area of ​​3 mm 2 The first holes 40105 may be distributed at equal intervals or at unequal intervals; Figure 4The second electrode ear 40202 is made of aluminum foil, and the second electrode conductive material 40204 is an aluminum strip structure. A second hole 40203 is opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201. The second hole 40203 has an area of ​​3 mm 2 The second holes 40203 can be distributed at equal intervals or at unequal intervals; during the winding process of the first electrode conductive material 40106, the first electrode ear 40103 and the first electrode conductive material 40106 are welded together on one side by a laser, which can be continuous welding or discontinuous welding; during the winding process of the second electrode conductive material 40204, the first electrode ear 40103 and the first electrode conductive material 40106 are welded together on one side by a laser, which can be continuous welding or discontinuous welding, and are wound with the inner diaphragm 403 and the outer diaphragm 404, refer to Figure 2 The first electrode 401, the second electrode 402, the inner separator 403 and the outer separator 404 are wound, the edge of the second electrode 402 covers the edge of the first electrode active material layer 40101 of the first electrode 401 by at least 0.5 mm, and the inner separator 403 and the outer separator 404 cover the edge of the second electrode 402 by 1 to 2 mm; Figure 1 After the winding is completed, the insulating film 500 is attached to fix the second electrode 402, the first electrode 401, the inner separator 403 and the outer separator 404.

[0052] Example 4

[0053] Taking lithium-ion batteries as an example, the cathode of the battery can refer to Figure 3 Set the ceramic layer 40102, you can also refer to Figure 4 No ceramic layer 40102 is provided, and the anode is Figure 4 The ceramic layer 40102 is not provided. Figure 3 The first electrode 401 shown is used as a cathode embodiment of a battery: the first electrode ear 40103 is made of aluminum foil, the first electrode conductive material 40106 is an aluminum strip structure, a first hole 40105 is opened in the first electrode ear 40103 of the first electrode 401 by laser or hardware mold, the lower edge of the first hole 40105 is 3 to 4 mm away from the upper edge of the first electrode active material layer 40101, and the first hole 40105 has an area of ​​3 mm 2 The first holes 40105 may be distributed at equal intervals or at unequal intervals; Figure 4The second electrode ear 40202 is made of aluminum foil, and the second electrode conductive material 40204 is an aluminum strip structure. A second hole 40203 is opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201. The second hole 40203 has an area of ​​3 mm 2 The second holes 40203 can be distributed at equal intervals or at unequal intervals; during the winding process of the first electrode conductive material 40106, the first electrode ear 40103 and the first electrode conductive material 40106 are welded together on one side by a laser, which can be continuous welding or discontinuous welding; during the winding process of the second electrode conductive material 40204, the first electrode ear 40103 and the first electrode conductive material 40106 are welded together on one side by a laser, which can be continuous welding or discontinuous welding, and are wound with the inner diaphragm 403 and the outer diaphragm 404, the edge of the second electrode 402 covers the edge of the first electrode active material layer 40101 of the first electrode 401 by at least 0.5 mm, and the inner diaphragm 403 and the outer diaphragm 404 cover the edge of the second electrode 402 by 1 to 2 mm; reference Figure 2 After the winding is completed, the outermost second electrode conductive material 40204 is welded with the adjacent inner second electrode conductive material 40204 or the second electrode ear 40202 by laser, or the outermost first electrode conductive material 40106 is welded with the adjacent inner first electrode conductive material 40106 or the first electrode ear 40103 by laser, and then the second electrode 402, the first electrode 401, the inner diaphragm 403 and the outer diaphragm 404 are fixed by the insulating film 500.

[0054] Example 5

[0055] Taking a lithium-ion battery as an example, the cathode foil of the battery is an aluminum composite film, and the anode foil of the battery is a copper composite film as an example, the cathode of the battery can refer to Figure 3 Coated ceramic layer 40102, also refer to Figure 4 Without coating ceramic layer 40102, the anode of the battery adopts Figure 4 No ceramic layer 40102 is applied. Figure 3 The first electrode 401 shown is used as a cathode embodiment of a battery: the first electrode ear 40103 is made of aluminum foil, the first electrode conductive material 40106 is an aluminum strip structure, a first hole 40105 is opened in the first electrode ear 40103 of the first electrode 401 by laser or hardware mold, the lower edge of the first hole 40105 is 3 to 4 mm away from the upper edge of the first electrode active material layer 40101, and the first hole 40105 has an area of ​​3 mm 2The first holes 40105 may be distributed at equal intervals or at unequal intervals; Figure 5 The first electrode conductive material 40106 has a width of 1 mm and a thickness of 0.5 mm. The two first electrode conductive materials 40106 are roll-welded along the first welding mark 40107 by an ultrasonic roll welder to the first electrode active material layer 40101 on both sides of the first electrode ear 40103. The distance from the outer edge of the first electrode conductive material 40106 to the outer edge of the first electrode ear 40103 is 0 mm. After welding, the material is rolled up. Figure 4 The second electrode ear 40202 is made of aluminum foil, and the second electrode conductive material 40204 is an aluminum strip structure. A second hole 40203 is opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201. The second hole 40203 has an area of ​​3 mm 2 The second holes 40203 may be distributed at equal intervals or at unequal intervals; Figure 6 The second electrode conductive material 40204 has a width of 1 mm and a thickness of 0.5 mm. The two second electrode conductive materials 40204 are roll-welded along the second welding mark 40205 by an ultrasonic roller welder to the two sides of the second electrode ear 40202. The distance from the outer edge of the second electrode conductive material 40204 to the outer edge of the second electrode ear 40202 is 0 mm. After welding, the second electrode conductive material 40204 is rolled up. Figure 2 The first electrode 401, the second electrode 402, the inner separator 403 and the outer separator 404 are wound, the edge of the second electrode 402 covers the edge of the first electrode active material layer 40101 of the first electrode 401 by at least 0.5 mm, and the inner separator 403 and the outer separator 404 cover the edge of the second electrode 402 by 1 to 2 mm; Figure 1 After the winding is completed, an insulating film 500 is attached to fix the second electrode 402, the first electrode 401, the inner separator 403 and the outer separator 404.

[0056] Example 6

[0057] Taking supercapacitor as an example, the cathode of the battery can refer to Figure 4 The anode of the battery uses Figure 4 .use Figure 4 The second electrode 402 shown in the figure is used as the cathode embodiment of the battery: the second electrode ear 40202 is made of aluminum foil, the second electrode conductive material 40204 is an aluminum strip structure, and a second hole 40203 is opened on the second electrode ear 40202 of the second electrode 402 by laser or hardware mold. The lower edge of the second hole 40203 is 1 to 2 mm away from the upper edge of the second electrode active material layer 40201, and the second hole 40203 has an area of ​​3 mm2 The second holes 40203 may be distributed at equal intervals or at unequal intervals; Figure 4 , the anode of the battery also uses a second electrode 402; Figure 2 , during the winding process of the second electrode conductive material 40204 in the second electrode 402 as the cathode, the second electrode ear 40202 and the second electrode conductive material 40204 are welded together on one side by a laser, which can be continuous welding or discontinuous welding; during the winding process of the second electrode conductive material 40204 in the second electrode 402 as the anode, the second electrode ear 40202 and the second electrode conductive material 40204 are welded together on one side by a laser, which can be continuous welding or discontinuous welding; and the inner separator 403 and the outer separator 404 are wound together; the edge of the second electrode 402 as the anode covers the edge of the second electrode active material layer 40201 in the second electrode 402 as the cathode by at least 0.5 mm, and the inner separator 403 and the outer separator 404 cover the edge of the second electrode 402 as the anode by 1 to 2 mm; refer to Figure 1 After winding is completed, an insulating film 500 is attached to fix the second electrode 402 as a cathode, the second electrode 402 as an anode, the inner separator 403 and the outer separator 404.

[0058] Cylindrical power supply assembly embodiment

[0059] Example 1

[0060] The positive electrode sheet 101 of the positive electrode bus 100 is welded by laser to the surface of the first electrode conductive material 40106 on the first electrode ear 40103 of the winding core 400, and the negative electrode sheet 201 of the negative electrode bus 200 is welded by laser to the surface of the second electrode conductive material 40204 on the second electrode ear 40202 of the winding core 400. Figure 5 ; Insulating pads 300 are provided on the positive bus 100 and the negative bus 200, respectively, as Figure 6 ; Place the winding core 400 into the aluminum shell 600, and weld the positive electrode column 103 and the positive electrode column hole 601 together by laser, so that the surface of the positive electrode column 103 and the outer surface of the positive electrode column hole 601 are nearly coincident, such as Figure 8 a; Place the cover plate 700 into the other end of the aluminum shell 600, such as Fig.10 a. Use laser to weld the negative electrode column 204 and the negative electrode column hole 705 together, and the surface of the negative electrode column 204 is nearly overlapped with the outer surface of the negative electrode column hole 705; after the power supply has gone through the processes of baking, liquid injection, high temperature static, formation, high temperature aging, secondary liquid injection, etc., the rubber nail 900 is inserted into the liquid injection hole 703, and then the aluminum nail 800 is put into the liquid injection hole 703 and laser welding is performed.

[0061] Example 2

[0062] The positive electrode sheet 101 of the positive electrode bus 100 is welded on the surface of the first electrode conductive material 40106 of the first electrode ear 40103 of the winding core 400 by laser welding, and the negative electrode sheet 201 of the negative electrode bus 200 is welded on the surface of the second electrode conductive material 40204 of the second electrode ear 40202 of the winding core 400 by laser welding, as shown in FIG. Figure 5 ; Insulating pads 300 are provided on the positive bus 100 and the negative bus 200, respectively, as Figure 6 ; Place the winding core 400 into the aluminum shell 600, and weld the positive electrode column 103 and the positive electrode column hole 601 together by laser, so that the surface of the positive electrode column 103 coincides with the surface of the positive electrode column step 602 of the positive electrode column hole 601, as shown Figure 8 b; Place the cover plate 700 into the other end of the aluminum shell 600, such as Fig.10 a. Use laser to weld the negative electrode column 204 and the negative electrode column hole 705 together, and the surface of the negative electrode column 204 coincides with the stepped surface of the negative electrode column hole 705; after the power supply has gone through the processes of baking, liquid injection, high temperature static, formation, high temperature aging, secondary liquid injection, etc., finally, the rubber nail 900 is inserted into the liquid injection hole 703, and then the aluminum nail 800 is put into the liquid injection hole 703 and laser welding is performed.

[0063] It should be noted that the utility model is a new cylindrical power supply. Compared with the existing new cylindrical power supplies, the utility model can increase the filling space of the electrolyte through design, so as to achieve the purpose of improving the battery cycle life. The positive electrode column and the positive electrode column hole at the bottom of the aluminum shell are laser welded, and the negative electrode column and the negative electrode column hole on the cover plate are laser welded. No piercing is required, which improves space utilization.

[0064] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A new cylindrical power supply, characterized in that: The invention comprises an aluminum shell (600), wherein a positive electrode column hole (601) is provided at the bottom of the aluminum shell (600), a positive electrode busbar (100) and a negative electrode busbar (200) are respectively provided at the lower end and the upper end of the aluminum shell (600), a cover plate (700) is provided at the top of the aluminum shell (600), a negative electrode column hole (705) is provided on the cover plate (700), an insulating pad (300) is provided between the positive electrode busbar (100) and the bottom of the aluminum shell (600), and between the negative electrode busbar (200) and the cover plate (700), a winding core (400) is provided inside the aluminum shell (600), and an insulating film (500) is provided outside the winding core (400).

2. A novel cylindrical power supply according to claim 1, characterized in that: The positive electrode busbar (100) comprises a positive electrode sheet (101), the bottom end of the positive electrode sheet (101) is fixedly connected to a positive electrode column (103), the positive electrode column (103) is matched with the positive electrode column hole (601) and laser welding is adopted, and a plurality of positive electrode busbar channels (102) and a plurality of current limiting holes (104) are evenly opened on the positive electrode sheet (101).

3. A novel cylindrical power supply according to claim 2, characterized in that: The negative electrode busbar (200) comprises a negative electrode sheet (201), a negative electrode column (204) is fixedly connected to the top of the negative electrode sheet (201), a plurality of negative electrode busbar channels (202) are evenly arranged on the negative electrode sheet (201), and a sealing rubber sleeve (203) is fixedly connected to the negative electrode column (204).

4. A novel cylindrical power supply according to claim 3, characterized in that: The negative pole column (204) is matched with the negative pole column hole (705) and is laser welded. The negative pole column (204) is a copper-aluminum composite pole. The sealing rubber sleeve (203) is a sealing rubber or fluororubber resistant to electro-liquid corrosion.

5. A novel cylindrical power supply according to claim 3, characterized in that: The cover plate (700) comprises a cover plate aluminum ring (701), the cover plate aluminum ring (701) is provided with a liquid injection hole (703), a pole through hole (708) and an explosion-proof valve hole, an explosion-proof plate (707) and an explosion-proof patch (709) are fixedly installed in the explosion-proof valve hole, a pole plastic ring (702) is fixedly connected in the pole through hole (708), a pole aluminum ring (704) is fixedly connected inside the pole plastic ring (702), a plastic nail (900) is arranged in the liquid injection hole (703), and an aluminum nail (800) is fixedly welded at the opening of the liquid injection hole (703).

6. A novel cylindrical power supply according to claim 5, characterized in that: The cover plate aluminum ring (701) is fixedly connected to the top of the aluminum shell (600); the pole plastic ring (702) is an injection molded part made of nano-scale thermoplastic resin, and the cover plate aluminum ring (701) and the pole aluminum ring (704) are fixedly connected by an injection molding process; the negative pole hole (705) is provided on the pole aluminum ring (704); and a plurality of nano-holes are provided on both the cover plate aluminum ring (701) and the pole aluminum ring (704).

7. A novel cylindrical power supply according to claim 3, characterized in that: The insulating pad (300) comprises an insulating pad body (301), wherein the insulating pad body (301) is an elastic insulating pad made of ceramic fiber cotton or PP fiber cotton or organic microporous material, wherein a central hole (303) is provided on the insulating pad body (301), and insulating pad channels (302) are evenly provided on the insulating pad body (301), and wherein the central hole (303) is compatible with both the positive electrode column (103) and the negative electrode column (204).

8. A novel cylindrical power supply according to claim 1, characterized in that: The winding core (400) comprises a first electrode (401), a second electrode (402), an inner diaphragm (403), an outer diaphragm (404) and a weld mark. The first electrode (401), the inner diaphragm (403), the second electrode (402) and the outer diaphragm (404) are overlapped in sequence, and the overlapped first electrode (401), the inner diaphragm (403), the second electrode (402) and the outer diaphragm (404) are wound around themselves. The first electrode (401) is in the inner layer, and the insulating film (500) is fixedly wound around the outer side of the outer diaphragm (404). Both the inner diaphragm (403) and the outer diaphragm (404) are coated with ammonium carbonate, ammonium bicarbonate or ethylene carbonate.

9. A novel cylindrical power supply according to claim 8, characterized in that: The first electrode (401) comprises a first electrode ear (40103), a first electrode conductive material (40106) is arranged on the first electrode ear (40103), a plurality of first grooves (40108) are provided on the first electrode conductive material (40106), a plurality of first holes (40105) are provided on the first electrode ear (40103), a ceramic layer (40102) is fixedly connected to the bottom end of the first electrode ear (40103), a first electrode active material layer (40101) is fixedly connected to the bottom end of the ceramic layer (40102), a plurality of concave and convex points (40104) are fixedly connected to the first electrode active material layer (40101), and a first weld mark (40107) is arranged between the first electrode conductive material (40106) and the first electrode ear (40103).

10. A novel cylindrical power supply according to claim 8, characterized in that: The second electrode (402) includes a second electrode ear (40202), a second electrode conductive material (40204) is arranged on the second electrode ear (40202), a plurality of second grooves (40206) are opened on the second electrode conductive material (40204), a plurality of second holes (40203) are opened on the second electrode ear (40202), a second electrode active material layer (40201) is fixedly connected to the bottom end of the second electrode ear (40202), and a second weld mark (40205) is arranged between the second electrode conductive material (40204) and the second electrode ear (40202).

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