Collector plate assembly of cylindrical battery and cylindrical battery

Abstract

A first surface of a positive collector plate is connected with the positive end face of a battery cell in a welded mode, a plurality of first reinforcing ribs are arranged on the positive collector plate and arranged in the radial direction of the positive collector plate, a plurality of first laser slotting lines are further arranged on a second surface of the positive collector plate, and the first laser slotting lines are arranged on the second surface of the positive collector plate in the radial direction of the positive collector plate. The first laser slotting line is close to the first reinforcing rib, the bottom surface of the negative current collecting disc abuts against the shell, the top surface of the negative current collecting disc is connected with the negative end surface of the battery cell in a welded mode, a plurality of second reinforcing ribs are arranged on the negative current collecting disc in the radial direction of the negative current collecting disc, a plurality of second laser slotting lines are further formed in the top surface of the negative current collecting disc, and the second laser slotting lines are connected with the second reinforcing ribs in the radial direction of the negative current collecting disc. And the second laser grooving line is close to the second reinforcing rib. According to the utility model, the reinforcing ribs can enhance the overall strength of the positive collector plate and the negative collector plate, the laser slotted lines can increase the internal and external elastic coefficients of the slotted lines, and the stability of the connection structure of the battery cell, the positive collector plate and the negative collector plate is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a current collector assembly for a cylindrical battery and a cylindrical battery.

Background Art

[0002] Generally, during the preparation of a battery, a positive current collector, a negative current collector are respectively welded to the positive and negative electrode tabs of the battery cell to lead out the positive and negative electrodes of the battery. The current collector structure of the existing battery is prone to welding detachment during the vibration of the battery during use, and the structural stability is poor.

[0003] In view of this, it is necessary to provide a new current collector assembly for a cylindrical battery and a cylindrical battery to overcome the above defects.

Summary of the Utility Model

[0004] The purpose of the utility model is to provide a current collector assembly for a cylindrical battery and a cylindrical battery to solve the above technical problems.

[0005] To achieve the above purpose, in the first aspect, the utility model provides a current collector assembly for a cylindrical battery, including a housing with one end open, a battery cell accommodated in the housing, and a positive current collector and a negative current collector provided at both ends of the battery cell; the positive current collector includes a first surface and a second surface opposite to the first surface, the first surface of the positive current collector is welded to the positive end face of the battery cell, a plurality of first reinforcing ribs are provided on the second surface of the positive current collector, the first reinforcing ribs are arranged along the radial direction of the positive current collector, and a plurality of first laser grooving lines are further opened on the second surface, and the first laser grooving lines are close to the first reinforcing ribs; the negative current collector includes a bottom surface and a top surface opposite to the bottom surface, the bottom surface of the negative current collector abuts against the housing, the top surface of the negative current collector is welded to the negative end face of the battery cell, a plurality of second reinforcing ribs are provided on the top surface of the negative current collector, the second reinforcing ribs are arranged along the radial direction of the negative current collector, and a plurality of second laser grooving lines are further opened on the top surface, and the second laser grooving lines are close to the second reinforcing ribs.

[0006] In a preferred embodiment, a first through hole penetrating the first surface and the second surface is opened at the center of the positive current collector, the second surface of the positive current collector includes a welding area surrounding the first through hole, and the first reinforcing ribs are arranged outside the welding area.

[0007] In a preferred embodiment, it further includes a positive electrode post, one end of the positive electrode post is welded in the welding area, and one end of the first reinforcing rib close to the center position of the positive current collector abuts against the positive electrode post.

[0008] In a preferred embodiment, both the first reinforcing rib and the second reinforcing rib are strip-shaped. The first laser slotted line is located on both sides of the long side of the first reinforcing rib, and the second laser slotted line is located on both sides of the long side of the second reinforcing rib.

[0009] In a preferred embodiment, one ends of several first laser slotted lines located between adjacent first reinforcing ribs and close to the center of the positive current collector are connected to each other, and one ends of several second laser slotted lines located between adjacent second reinforcing ribs and close to the center of the negative current collector are connected to each other.

[0010] In a preferred embodiment, a welding boss is provided on the bottom surface of the negative current collector. The welding boss is located at the center of the negative current collector, and the negative current collector is welded to the housing.

[0011] In a preferred embodiment, an aluminum plate and an upper cover plate are further included. The aluminum plate is welded to one end of the positive electrode post away from the positive current collector. The upper cover plate is fixed on the aluminum plate. The edge of the aluminum plate extends and bends towards the upper cover plate to form a wrapped edge, and the wrapped edge is fixed on the upper cover plate.

[0012] In a preferred embodiment, an annular explosion-proof engraved line is provided on the surface of the aluminum plate close to the positive electrode post.

[0013] In a preferred embodiment, several first positioning grooves are further provided on the edge of the positive current collector, and several second positioning grooves are further provided on the edge of the negative current collector.

[0014] In a second aspect, the present utility model provides a cylindrical battery, including the current collector assembly of the cylindrical battery according to any one of the above first aspects.

[0015] Compared with the prior art, the utility model provides a cylindrical battery collector disk assembly and a cylindrical battery, wherein the first surface of the positive collector disk is welded to the positive terminal surface of the battery cell, a plurality of first reinforcing ribs are arranged on the second surface of the positive collector disk, the first reinforcing ribs are arranged along the radial direction of the positive collector disk, a plurality of first laser groove lines are also opened on the second surface, the first laser groove lines are close to the first reinforcing ribs, the bottom surface of the negative collector disk abuts against the shell, the top surface of the negative collector disk is welded to the negative terminal surface of the battery cell, and a plurality of first laser groove lines are arranged on the top surface of the negative collector disk. A plurality of second reinforcing ribs are arranged radially along the negative current collecting disk, and a plurality of second laser slotting lines are also arranged on the top surface, and the second laser slotting lines are close to the second reinforcing ribs. With such a design, the reinforcing ribs can strengthen the overall strength of the positive current collecting disk and the negative current collecting disk, and the laser slotting lines can increase the elastic coefficient inside and outside the slotting lines, so that a pullable space is generated inside and outside the slotting lines. When the battery cell is subjected to a certain vibration during actual use, the welding point will not become desoldered and fail, thereby enhancing the structural stability of the connection between the battery cell and the positive current collecting disk and the negative current collecting disk.

Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A structural diagram of a cylindrical battery provided by the utility model;

[0018] Figure 2 A structural diagram of a current collecting plate assembly of a cylindrical battery provided by the utility model;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 A structural diagram of a positive current collecting disk in a current collecting disk assembly of a cylindrical battery provided by the utility model;

[0021] Figure 5 A structural diagram of a negative current collecting plate in a current collecting plate assembly of a cylindrical battery provided by the utility model;

[0022] Figure 6 This is an exploded structural diagram of the current collecting plate assembly of the cylindrical battery provided by the utility model. [Specific implementation method]

[0023] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0024] See also Figure 1 , which is a structural diagram of a cylindrical battery 200 provided by the utility model. The cylindrical battery 200 provided by the utility model includes a current collecting plate assembly 100. The current collecting plate structure of the utility model ensures that when the battery cell is subjected to a certain vibration during actual use, the welding part will not become unsoldered and fail, thereby improving the overall strength of the current collecting plate and the structural stability of the connection with the battery cell.

[0025] See also Figures 2 to 3 The current collecting plate assembly 100 of the cylindrical battery includes a shell 10 with an opening at one end, a battery cell 20 accommodated in the shell 10, and a positive current collecting plate 30 and a negative current collecting plate 40 arranged at both ends of the battery cell 20.

[0026] See also Figure 4 The positive current collecting disk 30 includes a first surface 301 and a second surface 302 opposite to the first surface 301. The first surface 301 of the positive current collecting disk 30 is welded to the positive end surface of the battery cell 20. A plurality of first reinforcing ribs 31 are arranged on the second surface 302 of the positive current collecting disk 30. The first reinforcing ribs 31 are arranged along the radial direction of the positive current collecting disk 30. A plurality of first laser grooved lines 32 are also opened on the second surface 302. The first laser grooved lines 32 are close to the first reinforcing ribs 31.

[0027] See also Figure 5 The negative current collecting disc 40 includes a bottom surface 401 and a top surface 402 opposite to the bottom surface 401, the bottom surface 401 of the negative current collecting disc 40 abuts against the shell 10, the top surface 402 of the negative current collecting disc 40 is welded to the negative end surface of the battery cell 20, a plurality of second reinforcing ribs 41 are arranged on the top surface 402 of the negative current collecting disc 40, and the second reinforcing ribs 41 are arranged along the radial direction of the negative current collecting disc 40, and a plurality of second laser groove lines 42 are also opened on the top surface 402, and the second laser groove lines 42 are close to the second reinforcing ribs 41.

[0028] Understandably, both the positive current collector plate 30 and the negative current collector plate 40 are provided with reinforcing ribs. The reinforcing ribs are arranged along the radial direction of the positive and negative current collector plates. The reinforcing ribs can enhance the overall strength of the positive current collector plate and the negative current collector plate. Moreover, laser slotted lines are also provided at positions close to the reinforcing ribs. The laser slotted lines can increase the elastic modulus inside and outside the slotted lines, creating a stretchable space inside and outside the slotted lines. When the battery cell is subjected to a certain amount of vibration during actual use, the welded joints will not become unsoldered and fail, enhancing the structural stability of the connection between the battery cell and the positive current collector plate 30 and the negative current collector plate 40.

[0029] For the current collector plate assembly 100 of the cylindrical battery provided by the present utility model, the first surface 301 of the positive current collector plate 30 is welded to the positive end face of the battery cell 20. A plurality of first reinforcing ribs 31 are provided on the second surface 302 of the positive current collector plate 30. The first reinforcing ribs 31 are arranged along the radial direction of the positive current collector plate 30. A plurality of first laser slotted lines 32 are also provided on the second surface 302. The first laser slotted lines 32 are close to the first reinforcing ribs 31. The bottom surface 401 of the negative current collector plate 40 abuts against the housing 10. The top surface 402 of the negative current collector plate 40 is welded to the negative end face of the battery cell 20. A plurality of second reinforcing ribs 41 are provided on the top surface 402 of the negative current collector plate 40. The second reinforcing ribs 41 are arranged along the radial direction of the negative current collector plate 40. A plurality of second laser slotted lines 42 are also provided on the top surface 402. The second laser slotted lines 42 are close to the second reinforcing ribs 41. With such a design, the reinforcing ribs can enhance the overall strength of the positive current collector plate and the negative current collector plate, and the laser slotted lines can increase the elastic modulus inside and outside the slotted lines, creating a stretchable space inside and outside the slotted lines. When the battery cell is subjected to a certain amount of vibration during actual use, the welded joints will not become unsoldered and fail, enhancing the structural stability of the connection between the battery cell and the positive current collector plate 30 and the negative current collector plate 40.

[0030] Please refer to Figure 6 , the housing 10 is a cylindrical steel shell. The housing 10 has a receiving space. The housing 10 includes a lower surface and an outer peripheral surface connecting the lower surface, and the lower surface and the outer peripheral surface enclose the receiving space. The battery cell 20 is received in the receiving space. Specifically, one end of the housing 10 away from the lower surface is open. The positive current collector plate 30 is arranged at the open end of the housing 10, and the negative current collector plate 30 is arranged on the lower surface.

[0031] The battery cell 20 is cylindrical. The battery cell 20 can specifically be formed by winding electrode plates. The battery cell 20 includes a positive end face and a negative end face opposite to the positive end face. The negative end face of the battery cell is welded to the negative current collector plate 40 to lead out the negative electrode of the cylindrical battery, and the positive end face of the battery cell is welded to the positive current collector plate 30 to lead out the positive electrode of the cylindrical battery.

[0032] In some embodiments, a first through hole 303 penetrating the first surface 301 and the second surface 302 is provided at the center of the positive current collecting plate 30, the second surface 300 of the positive current collecting plate 30 includes a welding area 304 surrounding the first through hole 303, and the first reinforcing rib 31 is arranged outside the welding area 304. Specifically, the first through hole 303 can be used to inject electrolyte into the housing 10, and the first reinforcing rib 31 is arranged outside the welding area 304, which can prevent the reinforcing rib from affecting the welding of other components in the welding area.

[0033] The positive collector disc 30 is a circular sheet structure, and the positive collector disc 30 is used to conduct the positive terminal surface of the battery cell (for example, the positive ear on the positive terminal surface) and the positive electrode column. In some embodiments, the collector disc assembly 100 also includes a positive electrode column 50, one end of the positive electrode column 50 is welded in the welding area 304, and one end of the first reinforcing rib 31 close to the center of the positive collector disc 30 abuts against the positive electrode column 50. Specifically, the first reinforcing rib 31 is raised relative to the second surface 302, and one end of the first reinforcing rib 31 abuts against the positive electrode column 50. The reinforcing rib 413 is conducive to positioning the positive electrode column during welding, and can also strengthen the overall strength of the positive collector disc to prevent the collector disc from being squeezed and deformed by external force when the collector disc is grabbed during the production process.

[0034] In some embodiments, the first reinforcement rib 31 is in the shape of a long strip, the first laser grooved line 32 is located on both sides of the long side of the first reinforcement rib 31, and the ends of several first laser grooved lines 32 located between adjacent first reinforcement ribs 31 close to the center of the positive collector disk 30 are connected to each other, that is, one end of the first laser grooved lines 32 between adjacent first reinforcement ribs 31 is connected. Such a design can further improve the stretchability coefficient of both sides of the laser grooved line (that is, the first reinforcement rib and the positive collector disk body), and enhance the vibration resistance of the connection between the positive collector disk and the battery cell.

[0035] In this embodiment, the number of the first reinforcing ribs 31 is four, and the four reinforcing ribs are symmetrically arranged. The laser slotting line creates a stretchable space inside and outside the slotting line. When the battery cell is subjected to a certain vibration during actual use, the welding joint will not become desoldered and fail. At the same time, the reinforcement ribs can increase the elastic coefficient inside and outside the slotting line.

[0036] In some embodiments, a plurality of first positioning grooves 305 are further provided on the edge of the positive collecting plate 30 , which are convenient for positioning incoming materials and facilitating automated production. Specifically, there are four first positioning grooves 305 , and the shape of the first positioning grooves 305 is specifically semicircular.

[0037] The positive electrode column 50 is roughly cylindrical, and a second through hole 501 is provided through the positive electrode column 50, and the second through hole 501 is located at the center of the positive electrode column. In some embodiments, a liquid injection hole is provided at one end of the positive electrode column close to the aluminum plate, and the liquid injection hole is connected to the second through hole, and the diameter of the liquid injection hole gradually decreases in the direction away from the aluminum plate, that is, the liquid injection hole is a conical liquid injection hole, which is convenient for the automatic liquid injection nozzle of the equipment to align, and is convenient for the liquid injection and the insertion and removal of nails in the chemical formation process. The liquid injection hole and the second through hole also play the role of exhaust after the formation.

[0038] The negative collector plate 40 is a circular sheet structure, and the negative collector plate 40 is used to conduct the negative terminal surface of the battery cell (for example, the negative terminal ear on the negative terminal surface) and the housing 10. The bottom surface 401 of the negative collector plate 40 is provided with a welding boss 43, and the welding boss 43 is located at the center of the negative collector plate 40, and the negative collector plate 40 is welded to the housing 10.

[0039] In some embodiments, the second reinforcement rib 41 is in the shape of a long strip, and the second laser grooved line 42 is located on both sides of the long side of the second reinforcement rib 41, and the ends of several second laser grooved lines 42 located between adjacent second reinforcement ribs 41 close to the center of the negative current collecting plate 40 are connected to each other, that is, one end of the second laser grooved lines 42 between adjacent second reinforcement ribs 41 is connected. Such a design can further improve the stretchability coefficient of both sides of the laser grooved line (that is, the second reinforcement rib and the negative current collecting plate body), and enhance the vibration resistance of the connection between the negative current collecting plate and the battery cell.

[0040] In this embodiment, the number of the second reinforcing ribs 41 is four, and the four reinforcing ribs are symmetrically arranged. The laser slotting line creates a stretchable space inside and outside the slotting line. When the battery cell is subjected to a certain vibration during actual use, the welding joint will not become desoldered and fail. At the same time, the reinforcement ribs can increase the elastic coefficient inside and outside the slotting line.

[0041] In some embodiments, a plurality of second positioning grooves 403 are further provided on the edge of the negative collecting plate 40. The second positioning grooves 403 are convenient for positioning incoming materials and for facilitating automated production. The number of the second positioning grooves 403 is specifically four, and the shape of the second positioning grooves 403 is specifically semicircular.

[0042] In the utility model, the reinforcing ribs of the positive and negative current collecting plates are arranged on the upper surfaces of the positive and negative current collecting plates. When the battery vibrates during use, they can better adapt to the vibration direction of the battery, play a good buffering role, and prevent open welding.

[0043] In some embodiments, the current collector assembly 100 further includes an aluminum plate 60 and an upper cover plate 70. The aluminum plate 60 is a circular sheet structure. A through third through hole 601 is provided at the center of the aluminum plate 60. At the same time, the third through hole 601 is also the welding hole for the positive electrode post 50. Through laser welding, the aluminum plate 60 and the positive electrode post 50 can be electrically connected. Specifically, the aluminum plate 60 is welded to the end of the positive electrode post 50 away from the positive current collector 30. The upper cover plate 70 is fixed on the aluminum plate 60. The edge of the aluminum plate 60 extends and bends towards the upper cover plate 70 to form a wrap-around edge 61, and the wrap-around edge 61 is fixed on the upper cover plate 70.

[0044] In some embodiments, an annular explosion-proof engraved line is provided on the surface of the aluminum plate 60 close to the positive electrode post 50, and the explosion-proof engraved line surrounds the third through hole 601 of the aluminum plate. Specifically, the explosion-proof engraved line is formed by thinning the thickness through a laser engraving process to reduce the compressive strength here. When the internal pressure reaches a certain level, this part will be broken, and the internal gas will be discharged from the inside of the battery cell. Moreover, since the explosion-proof engraved line is annular, after the explosion-proof engraved line is broken, the positive electrode post and the aluminum plate are cut off and electrically connected, greatly ensuring the safety of the battery cell during use.

[0045] Further, the positive electrode post 50 is located between the positive current collector 30 and the aluminum plate 60, and the positive electrode post 50 is used to conduct electricity between the positive current collector and the aluminum plate. A welding ring groove is provided at the end of the positive electrode post 50 close to the aluminum plate, and the welding ring groove surrounds the liquid injection hole. The aluminum plate is welded in the welding ring groove. Welding the aluminum plate in the welding ring groove can increase the welding area between the aluminum plate and the positive electrode post, making the welding more firm and enhancing the structural stability. In some embodiments, a circular welding line is further provided at the end of the positive electrode post away from the aluminum plate. The welding line forms a circular protrusion on the end face of the positive electrode post, which is conducive to accurately welding the welding line to the welding area of the positive current collector.

[0046] A sealing bead 51 is welded in the second through hole 501 of the positive electrode post 50. The sealing bead 51 is a spherical sealing steel bead, and the sealing bead is used to seal the second through hole after primary vacuum liquid injection, open formation, and secondary vacuum liquid injection. Sealing with the sealing steel bead ensures that the gas generated during the operation of the battery cell will not affect the traditional screw, the electrolyte will not overflow, effectively ensuring the internal environment of the battery cell and extending the service life of the battery cell.

[0047] In some embodiments, the current collector assembly 40 further includes a sealing ring 80. The sealing ring 80 is an annular rubber ring, and the sealing ring 80 serves to isolate the positive and negative electrodes and prevent electrolyte penetration. Specifically, the sealing ring 80 includes a top wall, a bottom wall, and a side wall connecting the top wall and the bottom wall. Specifically, both the top wall and the bottom wall are perpendicular to the side wall. The aluminum plate 60 and the upper cover plate 70 are clamped within the sealing ring 80, that is, clamped between the top wall and the bottom wall.

[0048] In this embodiment, the bottom wall is convexly provided with a lower water stop rib. After encapsulation, the lower water stop rib can prevent the electrolyte from penetrating through the contact surface between the aluminum plate and the sealing ring. A waterproof groove can be formed between the lower water stop rib and the side wall, and the waterproof groove can further prevent the electrolyte from overflowing. The bottom wall also extends away from the top wall to form a bottom water stop rib. After encapsulation, the bottom water stop rib can prevent the electrolyte from penetrating through the contact surface between the steel shell and the sealing ring, further ensuring the sealing performance of the battery. In other embodiments, the side wall can also be convexly provided with side waterproof ribs to prevent the electrolyte from penetrating through the contact surface between the aluminum plate and the sealing ring.

[0049] In the present utility model, the first surface of the positive current collector plate 30 is welded to the positive end face of the battery cell 20. One end of the positive electrode post 50 is welded to the second surface of the positive current collector plate 30, and the other end of the positive electrode post 30 is welded to the aluminum plate 60. The upper cover plate 70 is fixed on the aluminum plate 60. A first through hole penetrating the first surface and the second surface is formed in the center of the positive current collector plate 30. A second through hole penetrating is formed in the center of the positive electrode post. A third through hole penetrating is formed in the center of the aluminum plate. And the first through hole, the second through hole, and the third through hole are relatively positioned. The electrolyte can flow through the first through hole, the second through hole, and the third through hole and be injected into the housing 10 to soak the battery cell 20. Since the positive electrode post 50 is provided with the second through hole, open-circuit formation can be realized after the first liquid injection. After open-circuit formation, the first through hole, the second through hole, and the third through hole are used for the second liquid injection. After the second liquid injection, the sealing bead is welded in the second through hole of the positive electrode post to seal the second through hole. This battery structure can change the traditional one-time liquid injection and realize the second liquid injection, greatly improving the liquid injection efficiency. The second liquid injection can make the electrode plates better soaked by the electrolyte, increasing the service life of the battery cell. This battery structure can change the traditional closed-circuit formation and realize open-circuit formation, and discharge the gas generated during formation from the inside of the battery cell, providing space for the second liquid injection and reducing the internal pressure, increasing the safety and service life of the product.

[0050] The current collector plate assembly 100 of the cylindrical battery provided by the present utility model is a battery structure with a pull-off function that can perform secondary liquid injection, formation, and gas exhaust. This battery structure can change the traditional one-time liquid injection and realize the second liquid injection, which can greatly improve the liquid injection efficiency. It can change the traditional closed-circuit formation and realize open-circuit formation, and discharge the gas generated during formation from the inside of the battery cell. This battery structure has reliable sealing after encapsulation. The second liquid injection can make the electrode plates better soaked by the electrolyte, increasing the service life of the battery cell. Open-circuit formation can discharge the gas generated during formation from the inside of the battery cell, providing space for the second liquid injection and reducing the internal pressure, increasing the safety and service life of the product. The sealing is reliable, ensuring the safety of the product. Sealing is carried out through a sealing steel bead, ensuring that the gas generated during the operation of the battery cell has no impact on the traditional screws, and the electrolyte will not overflow, effectively ensuring the internal environment of the battery cell and extending the service life of the battery cell.

[0051] The utility model also provides a cylindrical battery, including any one of the above-mentioned current collecting plate assemblies for cylindrical batteries. It should be noted that the embodiments of the current collecting plate assembly 100 for cylindrical batteries provided by the utility model are all applicable to the cylindrical battery provided by this embodiment, and can achieve the same / similar technical effects.

[0052] In summary, the current collecting disk assembly 100 of the cylindrical battery and the cylindrical battery provided by the utility model, the first surface 301 of the positive current collecting disk 30 is welded to the positive end surface of the battery cell 20, a plurality of first reinforcing ribs 31 are arranged on the second surface 302 of the positive current collecting disk 30, and the first reinforcing ribs 31 are arranged along the radial direction of the positive current collecting disk 30, and a plurality of first laser groove lines 32 are also opened on the second surface 302, and the first laser groove lines 32 are close to the first reinforcing ribs 31, the bottom surface 401 of the negative current collecting disk 40 abuts against the shell 10, and the top surface 402 of the negative current collecting disk 40 is welded to the negative end surface of the battery cell 20, and the negative collector A plurality of second reinforcing ribs 41 are arranged on the top surface 402 of the flow disk 40, and the second reinforcing ribs 41 are arranged along the radial direction of the negative current collecting disk 40. A plurality of second laser grooved lines 42 are also provided on the top surface 402, and the second laser grooved lines 42 are close to the second reinforcing ribs 41. With such a design, the reinforcing ribs can strengthen the overall strength of the positive current collecting disk and the negative current collecting disk, and the laser grooved lines can increase the elastic coefficient inside and outside the grooved lines, so that a pullable space is generated inside and outside the grooved lines. When the battery cell is subjected to a certain vibration during actual use, the welding joint will not become desoldered and fail, thereby enhancing the structural stability of the connection between the battery cell and the positive current collecting disk 30 and the negative current collecting disk 40.

[0053] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present utility model.

Claims

1. A current collecting plate assembly for a cylindrical battery, characterized in that: The invention comprises a shell with an opening at one end, a battery cell accommodated in the shell, and a positive collector disk and a negative collector disk arranged at both ends of the battery cell; the positive collector disk comprises a first surface and a second surface opposite to the first surface, the first surface of the positive collector disk is welded to the positive terminal surface of the battery cell, a plurality of first reinforcing ribs are arranged on the second surface of the positive collector disk, the first reinforcing ribs are arranged along the radial direction of the positive collector disk, a plurality of first laser grooved lines are also opened on the second surface, and the first laser grooved lines are close to the first reinforcing ribs; the negative collector disk comprises a bottom surface and a top surface opposite to the bottom surface, the bottom surface of the negative collector disk abuts against the shell, the top surface of the negative collector disk is welded to the negative terminal surface of the battery cell, a plurality of second reinforcing ribs are arranged on the top surface of the negative collector disk, the second reinforcing ribs are arranged along the radial direction of the negative collector disk, a plurality of second laser grooved lines are also opened on the top surface, and the second laser grooved lines are close to the second reinforcing ribs.

2. The current collecting plate assembly of a cylindrical battery as claimed in claim 1, characterized in that: A first through hole penetrating the first surface and the second surface is opened at the center of the positive current collecting plate, the second surface of the positive current collecting plate includes a welding area surrounding the first through hole, and the first reinforcing rib is arranged outside the welding area.

3. The current collecting plate assembly of a cylindrical battery as claimed in claim 2, characterized in that: It also includes a positive electrode column, one end of which is welded in the welding area, and one end of the first reinforcing rib close to the center of the positive current collecting disk abuts against the positive electrode column.

4. The current collecting plate assembly of a cylindrical battery according to claim 1, characterized in that: The first reinforcing rib and the second reinforcing rib are both in the shape of long strips. The first laser slotting line is located on both sides of the long side of the first reinforcing rib, and the second laser slotting line is located on both sides of the long side of the second reinforcing rib.

5. The current collecting plate assembly of a cylindrical battery as claimed in claim 4, characterized in that: The ends of the first laser slotted lines between adjacent first reinforcing ribs close to the center of the positive collector disk are connected to each other, and the ends of the second laser slotted lines between adjacent second reinforcing ribs close to the center of the negative collector disk are connected to each other.

6. The current collecting plate assembly of a cylindrical battery as claimed in claim 1, characterized in that: A welding boss is disposed on the bottom surface of the negative current collecting plate. The welding boss is located at the center of the negative current collecting plate and the negative current collecting plate is welded to the shell.

7. The current collecting plate assembly of a cylindrical battery as claimed in claim 3, characterized in that: It also includes an aluminum plate and an upper cover plate, wherein the aluminum plate is welded to one end of the positive electrode column away from the positive current collecting plate, the upper cover plate is fixed to the aluminum plate, and the edge of the aluminum plate extends and is bent toward the direction close to the upper cover plate to form a edging, and the edging is fixed to the upper cover plate.

8. The current collecting plate assembly of a cylindrical battery as claimed in claim 7, characterized in that: The surface of the aluminum plate close to the positive electrode column is provided with an annular explosion-proof engraved line.

9. The current collecting plate assembly of a cylindrical battery according to any one of claims 1 to 8, characterized in that: The edge of the positive current collecting plate is provided with a plurality of first positioning grooves, and the edge of the negative current collecting plate is provided with a plurality of second positioning grooves.

10. A cylindrical battery, characterized in that: A current collecting plate assembly comprising a cylindrical battery as claimed in any one of claims 1 to 9.

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