A cylindrical battery

Abstract

The utility model discloses a cylindrical battery, the both ends of the roll core in the shell are equipped with first tab and second tab respectively, the first tab includes a plurality of first tab sections that are arranged at intervals along the circumference, and the second tab includes a plurality of second tab sections that are arranged at intervals along the circumference, the threaded pole of the first current collector disc is insulated through the pole through -hole and is connected with the nut outside the shell, the first current collector disc is equipped with the first through -hole, and the first tab section passes through the first through -hole and is connected with the side of the first current collector disc away from the roll core after bending, the second current collector disc is equipped with the second through -hole, and the second tab section passes through the second through -hole and is connected with the side of the second current collector disc away from the roll core after bending, and the shell open end is closed through the cover plate. Advantageous effects: the utility model passes through the tab and is bent towards the through -hole of the current collector disc and is welded on the side of the current collector disc away from the roll core, makes the welding position of the tab and the current collector disc in the visible state, is favorable to reduce the false welding, the welding -leak phenomenon and so on, improves the welding yield.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery technology, and specifically to a cylindrical battery. Background Technology

[0002] Currently, the connection method between the core and the current collector in cylindrical batteries is usually to place the current collector on the end face of the core, and then weld the current collector and the core together as a whole. Both ends of the core are connected to the negative current collector and the positive current collector by penetration welding. Moreover, penetration welding requires the laser to penetrate the current collector first, and then weld it to the tab below the current collector. This penetration welding method has high requirements for the assembly accuracy of structural components and high equipment maintenance costs. If the laser intensity is too high, it is very easy to penetrate the tab below the current collector, affecting the welding yield. In addition, welding defects such as incomplete welding and missing welding are also prone to occur when the tab is welded on the back of the current collector. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a cylindrical battery in which the tab passes through a through hole in the current collector and bends toward the current collector, and the tab is welded to the side of the current collector away from the core. The tab and the current collector do not need to be welded through, so the welding position of the tab and the current collector is visible, which improves the controllability of welding, helps to reduce phenomena such as incomplete welding and missing welding, and improves the welding yield.

[0004] The purpose of this utility model is achieved through the following technical measures: a cylindrical battery, comprising: a casing, one end of which is an open end, and the other end of which has a through hole for a terminal post; a core, which is disposed inside the casing, and the two ends of the core are respectively provided with a first electrode tab and a second electrode tab, the first electrode tab including a plurality of first electrode tab segments spaced apart circumferentially, and the second electrode tab including a plurality of second electrode tab segments spaced apart circumferentially; a first current collector, which is provided with a threaded terminal post, the threaded terminal post passing through the through hole insulatedly and connected to a nut disposed on the outside of the casing, the nut being insulated from the casing, the first current collector having a first through hole corresponding to the first electrode tab segment, the first electrode tab segment passing through the first through hole and bent and then connected to the side of the first current collector away from the core; a second current collector, which is provided with a second through hole corresponding to the second electrode tab segment, the second electrode tab segment passing through the second through hole and bent and then connected to the side of the second current collector away from the core, the second current collector being connected to the open end of the casing, and the open end of the casing being closed by a cover plate.

[0005] In some embodiments, there are three or more first electrode segments and second electrode segments.

[0006] In some embodiments, the lengths of the plurality of first electrode segments are all the same, and the lengths of the plurality of second electrode segments are all the same.

[0007] In some embodiments, the first tab segment and / or the second tab segment are cut into a plurality of first tab blocks and / or second tab blocks distributed circumferentially.

[0008] In some embodiments, the threaded pole has a venting channel that extends through the threaded pole and the first manifold along the axial direction of the threaded pole. An explosion-proof valve is connected to the end of the venting channel away from the first manifold.

[0009] In some embodiments, the second manifold has a liquid injection hole, which is sealed with anti-corrosion adhesive nails.

[0010] In some embodiments, an insulating sealing gasket is provided between the nut and the housing.

[0011] In some embodiments, an insulating sealing ring is provided between the threaded pole and the housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a cylindrical battery that changes the traditional connection method of through welding between the electrode tab and the current collector. The electrode tab passes through the through hole opened on the current collector and bends towards the current collector, and is welded to the side of the current collector away from the core. The electrode tab and the current collector do not need to be through welded, which reduces the laser intensity and welding requirements. At the same time, the welding position between the electrode tab and the current collector is visible, and the welding situation can be directly observed, which improves the controllability of welding and helps to reduce phenomena such as incomplete welding and missing welding, thereby improving the welding yield.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0016] Figure 3 This is an exploded view of a cylindrical battery.

[0017] Figure 4 This is a schematic diagram of the core structure.

[0018] Figure 5 This is a schematic diagram of the first collector disk.

[0019] Figure 6 This is a schematic diagram of the second collector disk.

[0020] The components are: 1. shell, 2. nut, 3. cover plate, 4. core, 5. insulating gasket, 6. insulating sealing ring, 7. first manifold, 8. second manifold, 9. anti-corrosion rubber nail, 10. first electrode lug, 11. threaded electrode post, 12. first through hole, 13. venting channel, 14. second through hole, and 15. liquid injection hole. Detailed Implementation

[0021] like Figures 1 to 6 As shown, a cylindrical battery includes: a housing 1, one end of which is open, and the other end of which has a through hole for an electrode post; the housing 1 has an accommodating space inside. A winding core 4 is disposed inside the housing 1, and each end of the winding core 4 has a first electrode tab and a second electrode tab, wherein the first electrode tab is either a negative electrode tab or a positive electrode tab. The first electrode tab includes multiple circumferentially spaced first electrode tab segments; specifically, the first electrode tabs are cut and wound to form multiple first electrode tab segments spaced circumferentially along the winding core 4. The second electrode tab includes multiple circumferentially spaced second electrode tab segments; specifically, the second electrode tabs are cut and wound to form multiple second electrode tab segments spaced circumferentially along the winding core 4. The first current collector 7, which can be a negative or positive current collector, is provided with a threaded pole 11. The threaded pole 11 passes through an insulating through-hole and is connected to a nut 2 located on the outside of the housing 1. The nut 2 is insulated from the housing 1, and the threaded pole 11 is fixed to the housing 1 through the nut 2. The first current collector 7 is provided with a first through-hole 12 corresponding to the first tab section. The first tab section passes through the first through-hole 12 and is bent before being connected to the side of the first current collector 7 away from the core 4. Specifically, after the first tab section passes through the first through-hole 12 and is bent to fit against the side of the first current collector 7 away from the core 4, it is laser welded together. The second collector plate 8 has a second through hole 14 corresponding to the second tab section. The second tab section passes through the second through hole 14 and is bent before being connected to the side of the second collector plate 8 away from the core 4. Specifically, after passing through the second through hole 14 and bending, the second tab section is fitted to the side of the second collector plate 8 away from the core 4 and then laser welded together. The second collector plate 8 is connected to the open end of the housing 1, which is closed by a cover plate 3. In this invention, through holes are opened on the positive and negative collector plates respectively, and the positive and negative tabs are passed through the through holes. After bending the tabs, they are welded to the side of the collector plate away from the core 4. The tabs and collector plates do not need to be welded through, which reduces the laser intensity and welding requirements. At the same time, the welding position of the tabs and collector plates is visible, and the welding situation can be directly observed, improving welding controllability and helping to reduce phenomena such as incomplete welding and missed welding, thereby improving the welding yield.

[0022] In some embodiments, there are three or more first electrode segments and second electrode segments. Specifically, the number of first electrode segments may be the same as or different from the number of second electrode segments.

[0023] In some embodiments, the lengths of the multiple first electrode segments are all the same, and the lengths of the multiple second electrode segments are all the same. Specifically, the multiple first electrode segments formed after the first electrode segments are cut and wound have the same length along the circumferential direction of the core, and the multiple second electrode segments formed after the second electrode segments are cut and wound have the same length along the circumferential direction of the core.

[0024] In some embodiments, the first and / or second tab segments are cut into multiple circumferentially distributed first tab blocks 10 and / or second tab blocks. Specifically, the first tab segment is cut multiple times along the circumferential direction of the core 4, so that the first tab segment is cut into multiple first tab blocks 10, facilitating the bending of the first tab towards the first collector plate 7. The second tab segment is cut multiple times along the circumferential direction of the core 4, so that the second tab segment is cut into multiple second tab blocks, facilitating the bending of the second tab towards the second collector plate 8. More preferably, the first tab segment is cut into equal sections. The second tab segment can be cut using the same cutting method as the first tab segment. Further, the number of first tab blocks 10 cut from the first tab segment may be the same as or different from the number of second tab blocks cut from the second tab segment.

[0025] In some embodiments, the threaded pole 11 is provided with a venting channel 13, which extends through the threaded pole 11 and the first manifold 7 along the axial direction of the threaded pole 11. An explosion-proof valve is connected to the end of the venting channel 13 away from the first manifold 7.

[0026] In some embodiments, the second manifold 8 has an injection hole 15, which is sealed by anti-corrosion glue nails 9, which are clamped between the second manifold 8 and the cover plate 3.

[0027] In some embodiments, an insulating sealing gasket 5 is provided between the nut 2 and the housing 1. The insulating sealing gasket 5 is used to achieve an insulating connection between the nut 2 and the housing 1.

[0028] In some embodiments, an insulating sealing ring 6 is provided between the threaded pole 11 and the housing 1. The insulating sealing ring 6 is used to achieve an insulating connection between the threaded pole 11 and the housing 1.

[0029] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A cylindrical battery, characterized in that, include: The housing has an open end at one end and a through hole for the pole post at the other end. The core is disposed inside the housing, and the two ends of the core are respectively provided with a first pole tab and a second pole tab. The first pole tab includes a plurality of first pole tab segments arranged circumferentially, and the second pole tab includes a plurality of second pole tab segments arranged circumferentially. The first collector plate has a threaded pole post. The threaded pole post is insulated through the pole post through hole and connected to a nut located on the outside of the housing. The nut is insulated from the housing. The first collector plate has a first through hole corresponding to the first pole lug section. The first pole lug section passes through the first through hole and is bent and connected to the side of the first collector plate away from the winding core. The second collector plate has a second through hole corresponding to the second electrode lug section. The second electrode lug section passes through the second through hole and is bent and connected to the side of the second collector plate away from the winding core. The second collector plate is connected to the opening end of the housing, and the opening end of the housing is closed by a cover plate.

2. The cylindrical battery according to claim 1, characterized in that: Both the first and second pole ear segments have more than three segments.

3. The cylindrical battery according to claim 2, characterized in that: The lengths of the multiple first pole segments are all the same, and the lengths of the multiple second pole segments are all the same.

4. The cylindrical battery according to claim 1, 2, or 3, characterized in that: The first electrode segment and / or the second electrode segment are cut into multiple first electrode blocks and / or second electrode blocks distributed circumferentially.

5. The cylindrical battery according to claim 1, characterized in that: The threaded pole has a venting channel that runs through the threaded pole and the first manifold along the axial direction of the threaded pole. An explosion-proof valve is connected to the end of the venting channel away from the first manifold.

6. The cylindrical battery according to claim 1, characterized in that: The second manifold has a liquid injection hole, which is sealed with anti-corrosion adhesive nails.

7. The cylindrical battery according to claim 1, characterized in that: An insulating sealing gasket is provided between the nut and the housing.

8. The cylindrical battery according to claim 1, characterized in that: An insulating sealing ring is provided between the threaded pole and the housing.

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