Collecting plate and battery

Abstract

The current collecting disc comprises a first current collecting piece, a second current collecting piece and an insulating piece, the first current collecting piece is of a disc type structure, an annular flange parallel to the axial direction is arranged in the circumferential direction of the first current collecting piece, the first current collecting piece is further provided with a through groove, and the through groove is communicated with the second current collecting piece. The second current collecting piece is arranged in the through groove and is in insulation connection with the first current collecting piece through an insulation part, the second current collecting piece is provided with a guide column, the guide column is provided with a first through hole, and the first through hole is communicated with a second through hole formed in the second current collecting piece. The integrated collector plate has the beneficial effects that the positive collector plate and the negative collector plate are integrated into the integrated collector plate, so that the occupied space is reduced, the space utilization rate is improved, the investment cost is reduced, the battery assembly process flow is shortened, the welding frequency in the battery assembly process is reduced through battery structure optimization, and the yield of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a current collector plate and a battery. Background Art

[0002] A battery is a battery with high capacity, long cycle life and wide operating temperature range. Currently, the battery generally includes a housing, a wound core and pole posts. The wound core is arranged in the housing, and a positive tab and a negative tab are respectively arranged at both ends of the wound core. The positive and negative tabs are connected to the pole posts at both ends of the housing through a current collector plate. Therefore, a positive current collector plate and a negative current collector plate are usually provided and respectively arranged at both ends of the wound core. For this split structure of the positive and negative current collector plates, during the battery assembly process, welding needs to be carried out separately, the number of welding times is large, and even the housing needs to be turned over at both ends, resulting in a long process flow. Moreover, it occupies a large space, has a low space utilization rate, and a high cost investment. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to some extent.

[0004] The utility model provides a current collector plate and a battery. By integrating the positive and negative current collector plates into an integrated current collector plate, the occupied space is reduced, the space utilization rate is improved, the input cost is reduced, the battery assembly process flow is shortened, and through the optimization of the battery structure, the number of welding times during the battery assembly process is reduced, and the yield rate of the battery is improved.

[0005] The purpose of the utility model is achieved by the following technical measures: A current collector plate includes a first current collector piece, a second current collector piece and an insulating part. The first current collector piece is of a disc structure, and a circumferential annular flange parallel to the axial direction is provided on the first current collector piece. The first current collector piece is also provided with a through groove. The second current collector piece is arranged in the through groove and is insulated and connected to the first current collector piece through the insulating part. The second current collector piece is provided with a guide post, and the guide post is provided with a first through hole. The first through hole is communicated with a second through hole arranged on the second current collector piece. The first current collector piece is connected to one of the positive tab and the negative tab, and the second current collector piece is connected to the other. The first current collector piece is connected to the battery housing through the annular flange, and the second current collector piece is connected to the pole post through the guide post.

[0006] In some embodiments, the insulating part is further provided with an insulating protrusion on the side far from the annular flange, and the insulating protrusion is used for isolating the positive and negative tabs.

[0007] In some embodiments, the protruding height of the insulating protrusion matches the height of the positive and negative tabs protruding from the wound core.

[0008] In some embodiments, along the axial direction of the first current collector piece, the height of the annular flange is higher than the maximum height of the second current collector piece and the insulating part.

[0009] In some embodiments, the insulating member is integrally injection-molded with the first current collector and the second current collector.

[0010] In some embodiments, positioning holes are provided on both the first current collector and the second current collector.

[0011] In some embodiments, the guide post has a frustum-shaped structure.

[0012] A battery includes a housing with an open end, and further includes a wound core, a cover plate, a sealing nail, and the current collector plate described above. The wound core is disposed inside the housing. The current collector plate is arranged above the wound core. An insulating pad is provided above the current collector plate. The diameter of the insulating pad matches the inner diameter of the annular flange. The cover plate is used to seal the housing. A pole column is insulatingly connected to the cover plate. The pole column is provided with a hollow channel. The sealing nail is used to seal the hollow channel. When the cover plate seals the housing, the outer side surface of the cover plate and the outer side surface of the annular flange are both in contact with the inner side surface of the housing. The top surface of the annular flange is in contact with the bottom surface of the cover plate. The guide post passes through the insulating pad and inserts into the hollow channel and is in contact with the inner wall of the hollow channel.

[0013] In some embodiments, the pole column is riveted to the cover plate, and an isolating member is provided between the pole column and the cover plate. The isolating member includes a sealing washer and an insulating sleeve.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model provides a current collector plate. By embedding the second current collector into the through groove of the first current collector and insulatingly connecting the first current collector and the second current collector through an insulating member, the first current collector is connected to the housing, and the second current collector is connected to the pole column, so as to integrate the first current collector and the second current collector into one body. Compared with the structure in which the positive and negative current collector plates are separately provided at both ends, the occupied space of the current collector plate is reduced, the space utilization rate is high, and the cost investment is low. During the battery assembly process, only welding operation needs to be performed at one end of the housing, and there is no need to flip the housing, thus shortening the battery assembly process flow.

[0015] The present utility model provides a battery. By optimizing the battery structure, the cover plate is embedded in the housing and the bottom surface of the cover plate is in contact with the top surface of the annular flange, so that when laser-welding the cover plate and the housing, the cover plate, the housing and the annular flange are welded into one body, and the fixing of the cover plate, the housing and the current collector plate is achieved by one welding, without separate welding, thus reducing the number of welds.

[0016] The present utility model provides a battery. Through the arrangement of the battery pole column and the current collector plate guide post, the liquid injection channel of the battery is integrated with the pole column, so as to realize liquid injection after the cover plate and the housing are welded. Compared with the prior art in which the pole column and the liquid injection channel are separately provided at both ends of the housing, the present utility model can avoid flipping the battery during the assembly process and simplify the assembly process.

[0017] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0018] Figure 1 is a schematic structural view of the current collecting plate Figure 1 .

[0019] Figure 2 is a schematic structural view of the current collecting plate Figure 2 .

[0020] Figure 3 is a schematic structural view of the current collecting plate Figure 3 .

[0021] Figure 4 is Figure 3 the sectional view taken along line A-A in

[0022] Figure 5 is Figure 3 the sectional view taken along line B-B in

[0023] Figure 6 is a schematic internal structure view of the battery.

[0024] Figure 7 is Figure 6 the enlarged view of part A in

[0025] Figure 8 is a schematic structural view of the current collecting plate Figure 4 .

[0026] Figure 9 is a schematic structural view of the current collecting plate Figure 5 .

[0027] Figure 10 is a schematic structural view of the current collecting plate Figure 6 .

[0028] Figure 11 is Figure 10 the sectional view taken along line A-A in

[0029] Figure 12 is a schematic structural view of the current collecting plate Figure 7 .

[0030] Figure 13 is a schematic structural view of the current collecting plate Figure 8 .

[0031] Figure 14 is a schematic structural view of the current collecting plate Figure 9 .

[0032] Figure 15 is Figure 14 the sectional view taken along line A-A in

[0033] Figure 16Schematic structure of the current collector plate Figure 10 。

[0034] Figure 17 Schematic structure of the current collector plate Figure 10 One.

[0035] Figure 18 Schematic structure of the current collector plate Figure 10 Two.

[0036] Figure 19 Is Figure 18 A-A cross-sectional view in

[0037] Figure 20 Schematic structure of the current collector plate Figure 10 Three.

[0038] Figure 21 Schematic structure of the current collector plate Figure 10 Four.

[0039] Figure 22 Schematic structure of the current collector plate Figure 10 Five.

[0040] Figure 23 Is Figure 22 A-A cross-sectional view in

[0041] Figure 24 Schematic diagram of the split structure of the current collector plate and the core

[0042] Wherein, 1. First current collector piece, 2. Second current collector piece, 3. Insulating part, 4. Annular flange, 5. Guide post, 6. Positioning hole, 7. Insulating protrusion, 8. Housing, 9. Core, 10. Cover plate, 11. Terminal post, 12. Sealing nail, 13. Insulating gasket, 14. Sealing washer, 15. Insulating sleeve, 16. High-temperature adhesive. Specific implementation mode

[0043] Such as Figures 1 to 24As shown in the figure, a current collector plate includes a first current collector sheet 1, a second current collector sheet 2 and an insulating member 3. The first current collector sheet 1 is of a disc structure. An annular flange 4 parallel to the axial direction is provided on the circumference of the first current collector sheet 1. The first current collector sheet 1 is also provided with a through groove. The second current collector sheet 2 is arranged in the through groove and is insulated and connected to the first current collector sheet 1 through the insulating member 3. The second current collector sheet 2 is provided with a guide post 5. The guide post 5 is provided with a first through hole, and the first through hole communicates with a second through hole provided on the second current collector sheet 2. The first current collector sheet 1 is connected to one of the positive electrode tab and the negative electrode tab, and the second current collector sheet 2 is connected to the other. The first current collector sheet 1 is connected to the battery housing 8 through the annular flange 4, and the second current collector sheet 2 is connected to the pole post 11 through the guide post 5. In the present disclosure, by embedding the second current collector sheet 2 into the through groove of the first current collector sheet 1 and insulatingly connecting the first current collector sheet 1 and the second current collector sheet 2 through the insulating member 3, the first current collector sheet 1 is connected to the housing 8, and the second current collector sheet 2 is connected to the pole post 11, so as to integrate the first current collector sheet 1 and the second current collector sheet 2 into one body. Compared with the structure in which the positive and negative current collector plates are separately arranged at both ends, the occupied space of the current collector plate is reduced, the space utilization rate is high, and the cost investment is low. During the battery assembly process, only welding operation needs to be carried out at one end of the housing 8, and there is no need to turn over the housing 8, thus shortening the battery assembly process flow.

[0044] It should be noted that the present disclosure does not limit the materials of the first current collector sheet 1, the second current collector sheet 2 and the guide post 5. Preferably, the current collector sheet connected to the negative electrode tab is made of copper, and the current collector sheet connected to the positive electrode tab is made of aluminum. Further preferably, the guide post 5 and the second current collector sheet 2 are made of the same material, and the guide post 5 and the second current collector sheet 2 are riveted or integrally formed by stamping.

[0045] It should be noted that the present disclosure does not limit the shapes of the through groove of the first current collector sheet 1, the insulating member 3 and the second current collector sheet 2. In the present disclosure, the through groove and the insulating member 3 are matched with the shape of the second current collector sheet 2. The first current collector sheet 1, the insulating member 3 and the second current collector sheet 2 together form a disc structure. Preferably, after the insulating member 3 and the second current collector sheet 2 are embedded into the through groove, the upper surfaces of the insulating member 3 and the second current collector sheet 2 are flush with the surface of the through groove of the first current collector sheet 1. In one embodiment, the second current collector sheet 2 may be a disc structure centered on the guide post 5, and a plurality of welding sheets are distributed along the circumference. The shape of the welding sheet may be a Figure 1 sector as shown, or a Figure 8 semicircle as shown, or a Figure 12 triangle as shown, or may also be a quadrilateral or other shapes. In another embodiment, the second current collector sheet 2 may also be a Figure 16 disc structure centered on the guide post 5 as shown.

[0046] In one embodiment, an insulating protrusion 7 is further provided on the side of the insulating member 3 away from the annular flange 4. The insulating protrusion 7 is used to isolate the positive and negative electrode tabs. By isolating the positive and negative electrode tabs through the insulating protrusion 7, the overlapping of the positive and negative electrode tabs can be prevented. Preferably, the insulating protrusion 7 is integrally injection-molded with the insulating member 3.

[0047] It should be noted that the shape of the insulating protrusion 7 is not limited in the present disclosure. When the second current collector 2 is centered on the guide post 5 and multiple welding pieces are distributed circumferentially, the insulating protrusion 7 extends radially centered on the guide post 5 as shown in the attached figure. Figure 2 When the second current collector 2 is a disc structure centered on the guide post 5, the insulating protrusion 7 is an annular structure centered on the guide post 5.

[0048] In one embodiment, the protruding height of the insulating protrusion 7 matches the height of the positive and negative electrode tabs protruding from the core 9. It can be understood that the protruding height of the insulating protrusion 7 is equal to or slightly greater than the height of the positive and negative electrode tabs protruding from the core 9. During the battery assembly process, the positive and negative electrode tabs need to be flattened, and the flattened positive and negative electrode tabs will protrude from the core 9 by a certain height. The protruding height of the insulating protrusion 7 being the same as the height of the positive and negative electrode tabs can make the insulating protrusion 7 just fit between the positive and negative electrode tabs, which can not only effectively isolate the positive and negative electrode tabs, but also make full use of the space of the housing 8 to improve the space utilization rate. Moreover, during the production process of the core 9, the positive and negative electrodes need to be separated by a separator, and the width of the separator is usually wider than the width of the positive and negative electrodes. Therefore, the protruding height of the insulating protrusion 7 can be slightly higher than the height of the positive and negative electrode tabs. During assembly, the insulating protrusion 7 can squeeze the separator downward, which can not only effectively isolate the positive and negative electrode tabs, but also play a certain role in fixing the core 9.

[0049] In one embodiment, along the axial direction of the first current collector 1, the height of the annular flange 4 is higher than the maximum height of the second current collector 2 and the insulating member 3. The flange being higher than the second current collector 2 and the insulating member 3 can ensure that the top surface of the annular flange 4 contacts the cover plate 10 during the battery assembly process, avoiding the contact between the second current collector 2 and the cover plate 10. Preferably, the upper surfaces of the second current collector 2 and the insulating member 3 are flush with the upper surface of the through groove.

[0050] In one embodiment, the insulating member 3 is integrally injection-molded with the first current collector 1 and the second current collector 2, which can improve the connection stability of the first current collector 1, the second current collector 2 and the insulating member 3, and at the same time can improve the battery assembly efficiency.

[0051] In one embodiment, positioning holes 6 are provided on both the first current collector 1 and the second current collector 2. During the injection molding process, the first current collector 1 and the second current collector 2 can be inserted onto the positioning posts of the injection mold through the positioning holes 6 to achieve the positioning of the first current collector 1 and the second current collector 2, improve the injection molding efficiency of the current collector plate, and improve the yield.

[0052] In one embodiment, the guide post 5 has a frustum structure. It can be understood that the diameter of the guide post 5 gradually decreases from the contact end with the second current collector 2 to the other end. The frustum structure facilitates the insertion of the guide post 5 into the pole post 11 of the cover plate 10, which can improve the assembly efficiency of the battery.

[0053] A battery includes a housing 8 with an open end, and further includes a wound core 9, a cover plate 10, a sealing nail 12, and the current collector plate described above. The wound core 9 is disposed inside the housing 8, the current collector plate is arranged above the wound core 9, an insulating pad 13 is provided above the current collector plate, and the diameter of the insulating pad 13 matches the inner diameter of the annular flange 4. It can be understood that the diameter of the insulating pad 13 is equal to or slightly smaller than the inner diameter of the annular flange 4, so that the insulating pad 13 can be placed inside the annular flange 4. The cover plate 10 is used to seal the housing 8, a pole post 11 is insulatedly connected to the cover plate 10, the pole post 11 is provided with a hollow channel, and the sealing nail 12 is used to seal the hollow channel. Preferably, the hollow channel includes a guide post insertion channel and a sealing nail installation channel that communicate with each other. The guide post insertion channel matches the guide post 5, and the sealing nail installation channel matches the sealing nail 12. Further preferably, the sealing nail 12 has an inverted frustum structure to facilitate the assembly of the sealing nail 12 into the hollow channel. When the cover plate 10 seals the housing 8, the outer side surface of the cover plate 10 and the outer side surface of the annular flange 4 are both in contact with the inner side surface of the housing 8, the top surface of the annular flange 4 is in contact with the bottom surface of the cover plate 10, and the guide post 5 passes through the insulating pad 13 and inserts into the hollow channel and contacts the inner wall of the hollow channel. It can be understood that when the cover plate 10 seals the housing 8, the cover plate 10 and the current collector plate are both embedded in the housing 8, the cover plate 10 is located above the current collector plate and the bottom surface of the cover plate 10 is in contact with the top surface of the annular flange 4 of the current collector plate. The annular flange 4 of the current collector plate is in contact with the housing 8 to achieve electrical connection between the annular flange 4 and the housing 8, and further achieve electrical connection between the first current collector 1 and the housing 8. The cover plate 10 is embedded in the housing 8 and the bottom surface of the cover plate 10 is in contact with the top surface of the annular flange 4, so as to achieve laser penetration welding when laser welding the cover plate 10 and the housing 8, and weld the cover plate 10, the housing 8 and the annular flange 4 into one body. Moreover, the setting of the annular flange 4 is also beneficial to uniform welding and improves the yield rate.

[0054] Further preferably, when the sealing nail 12 seals the hollow channel of the pole post 11, the bottom surface of the sealing nail 12 is in contact with the top surface of the guide post 5. So as to achieve laser penetration welding when laser welding the sealing nail 12 and the pole post 11, and weld the sealing nail 12, the pole post 11 and the guide post 5 into one body.

[0055] It should be noted that the battery housing 8 in the present disclosure is not limited to a cylindrical battery, and the disc structure in the present disclosure is not limited to a disc structure. The housing 8 in the present disclosure may be a columnar structure with a polygonal radial cross-section, and the disc structure of the current collector disc may be a polygonal disc structure matching the polygonal radial cross-section of the housing 8. For example, in other embodiments, the housing 8 is a main body structure with a square radial cross-section, and the disc structure may be a square disc structure, as Figure 20 shown. Further, for example, the housing 8 is a prismatic structure with a hexagonal radial cross-section, and the disc structure may be a hexagonal disc structure, as Figure 12 shown.

[0056] In one embodiment, the terminal post 11 is riveted to the cover plate 10, and a spacer is provided between the terminal post 11 and the cover plate 10. The spacer includes a sealing washer 14 and an insulating sleeve 15. Specifically, the terminal post 11 includes a base and a riveting post. The cover plate 10 is provided with a mounting hole, and the riveting post can pass through the mounting hole. When assembling the terminal post 11 and the cover plate 10, first, the sealing washer 14 is sleeved on the riveting post, the riveting post is passed through the mounting hole, then the insulating sleeve 15 is sleeved on the riveting post, and finally the riveting post is press-riveted to rivet the terminal post 11 to the cover plate 10. Preferably, the sealing washer 14 is a U-shaped washer, and an embedding groove is provided at the bottom of the cover plate 10. When the terminal post 11 is riveted to the cover plate 10, one side wall of the U-shaped washer is located between the riveting post and the cover plate 10, and the other side wall is embedded in the embedding groove.

[0057] An assembly method of a battery, based on the above-mentioned battery, includes the following steps:

[0058] Step 1: Weld the wound core 9 to the current collector disc. Specifically, one of the positive and negative electrode tabs on the wound core 9 is welded to the first current collector piece 1, and the other is welded to the second current collector piece 2. Preferably, the positive electrode tab is welded to the first current collector piece 1, and the negative electrode tab is welded to the second current collector piece 2. Then, the welded wound core 9, current collector disc, insulating pad 13, and cover plate 10 are installed into the housing 8. Specifically, the wound core 9 and the current collector disc are placed into the housing 8, then the insulating pad 13 is placed into the housing 8 so that the insulating pad 13 is located within the annular flange 4 of the current collector disc, and finally the cover plate 10 is placed into the housing 8, and the guide post 5 is inserted into the terminal post 11.

[0059] Step 2: Laser-weld the cover plate 10 to the housing 8 so that the melt flows along the weld between the cover plate 10 and the housing 8 to the annular flange 4, welding the cover plate 10, housing 8, and annular flange 4 into one body.

[0060] Step 3: Inject electrolyte into the housing 8 through the terminal post 11 and the guide post 5. After injection, weld the sealing nail 12 to the terminal post 11 to seal the terminal post 11 through the sealing nail 12, completing the assembly of the battery.

[0061] In one embodiment, after the current collector plate is welded to the positive and negative electrode tabs in step 1, a layer of high-temperature adhesive 16 is wrapped around the outside of the winding core 9 and the negative electrode tab to prevent the negative electrode tab from contacting the first current collector plate 1. Preferably, the high-temperature adhesive 16 is wrapped starting from the edge of the welding area between the second current collector plate 2 and the negative electrode tab. It can be understood that when the second current collector plate 2 is welded to the negative electrode tab, the edge of the second current collector plate 2 contacts the edge of the high-temperature adhesive 16.

[0062] In one embodiment, before step 1, it further includes the winding of the winding core 9 and the flattening process of the positive and negative electrode tabs. The winding of the winding core 9 and the flattening of the positive and negative electrode tabs can adopt the methods disclosed in the prior art.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0067] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Variations, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are all within the protection scope of the present utility model.

Claims

1. A current collecting plate, characterized in that: It includes a first current collecting sheet, a second current collecting sheet and an insulating member, the first current collecting sheet is a disc structure, the circumference of the first current collecting sheet is provided with an annular flange parallel to the axial direction, the first current collecting sheet is also provided with a through groove, the second current collecting sheet is arranged in the through groove and is insulated and connected to the first current collecting sheet through the insulating member, the second current collecting sheet is provided with a guide column, the guide column is provided with a first through hole, the first through hole is connected to the second through hole provided on the second current collecting sheet, the first current collecting sheet is connected to one of the positive ear and the negative ear, the second current collecting sheet is connected to the other, the first current collecting sheet is connected to the battery casing through the annular flange, and the second current collecting sheet is connected to the pole through the guide column.

2. The collecting plate according to claim 1, characterized in that: The insulating member is further provided with an insulating protrusion on a side away from the annular flange, and the insulating protrusion is used to isolate the positive and negative electrode ears.

3. The collecting plate according to claim 2, characterized in that: The protruding height of the insulating protrusion matches the height of the positive and negative electrode ears protruding from the winding core.

4. The collecting plate according to claim 1, characterized in that: Along the axial direction of the first current collecting piece, the height of the annular flange is higher than the maximum height of the second current collecting piece and the insulating member.

5. The collecting plate according to claim 1, characterized in that: The insulating member is integrally injection-molded with the first current collecting sheet and the second current collecting sheet.

6. The collecting plate according to claim 5, characterized in that: The first current collecting sheet and the second current collecting sheet are both provided with positioning holes.

7. The collecting plate according to claim 1, characterized in that: The guide column is a truncated cone structure.

8. A battery, comprising a housing with an opening at one end, characterized in that: It also includes a winding core, a cover plate, a sealing nail and a current collecting plate according to any one of claims 1 to 7, the winding core is arranged in the shell, the current collecting plate is arranged above the winding core, an insulating pad is arranged above the current collecting plate, the diameter of the insulating pad matches the inner diameter of the annular flange, the cover plate is used to seal the shell, a pole is insulated and connected on the cover plate, the pole is provided with a hollow channel, the sealing nail is used to seal the hollow channel, when the cover plate seals the shell, the outer side surface of the cover plate and the outer side surface of the annular flange are in contact with the inner side surface of the shell, the top surface of the annular flange is in contact with the bottom surface of the cover plate, and the guide column is inserted into the hollow channel through the insulating pad and contacts with the inner wall of the hollow channel.

9. The battery according to claim 8, characterized in that: The pole is riveted to the cover plate, and an isolating member is arranged between the pole and the cover plate. The isolating member comprises a sealing gasket and an insulating sleeve.

Images