CN217823176U

CN217823176U - Adapter sheet for cylindrical battery and cylindrical battery

Info

Publication number: CN217823176U
Application number: CN202220858096.5U
Authority: CN
Inventors: 李勇军; 陈圣立; 於洪将
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-11-15
Anticipated expiration: 2032-04-14

Abstract

The utility model belongs to the technical field of power battery, concretely relates to adapter piece and cylinder battery for cylinder battery, including first electrically conductive basal portion, the electrically conductive basal portion of second and connecting portion, first electrically conductive basal portion and the electrically conductive basal portion of second pass through connecting portion insulating connection, and first electrically conductive basal portion and the electrically conductive basal portion polarity of second are opposite. The utility model provides a pair of adapter plate for cylinder battery, first electrically conductive basal portion passes through laser welding fixed connection with an electrode end that the cylinder rolled up the core, the electrically conductive basal portion of second passes through laser welding fixed connection with the other electrode end of cylinder battery, and be provided with the connecting portion of making through the injection moulding technology between the electrically conductive basal portion of first electrically conductive basal portion and second, can reduce spare part manufacturing process cost, furthermore, the volume of cylinder battery has been reduced, and then the energy density of cylinder battery has been improved, not only can solve the electrical core both ends and go out the processing procedure defect that utmost point ear exists, thereby the security performance and the production efficiency of cylinder battery have been improved.

Description

Adapter sheet for cylindrical battery and cylindrical battery

Technical Field

The utility model belongs to the technical field of power battery, concretely relates to adapter plate and cylinder battery for cylinder battery.

Background

With the development of modern society and the enhancement of environmental awareness of people, more and more devices select a lithium battery as a power supply, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, so that a wide space is provided for the application and development of the lithium battery. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries. The adapter sheet is a structural member in the battery, and laser welding is needed in the battery manufacturing process for the adapter sheet in the battery field.

Cylindrical battery is with mass flow piece (adaptor piece), at present by the wide use in power cylinder battery sets up, under the ordinary condition, the mass flow piece sets up on the utmost point ear terminal surface at both ends about the electric core, the mass flow piece passes through laser welding and lid electricity with utmost point ear and is connected or insulating processing, but the mass flow piece sets up just, negative pole mass flow piece, and set up the upper and lower both ends at the electric core respectively, the volume that has increased cylindrical battery and then reduced cylindrical battery's energy density, moreover, whole part cost and processing procedure defect have still been increased, thereby influence the security performance of electric core.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an one of the purpose lies in: aiming at the defects of the prior art, the adapter sheet for the cylindrical battery is provided, the manufacturing process cost of parts can be reduced, and the energy density of the cylindrical battery is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an adaptor sheet for a cylindrical battery comprises a first conductive base part, a second conductive base part and a connecting part, wherein the first conductive base part and the second conductive base part are in insulated connection through the connecting part, and the polarities of the first conductive base part and the second conductive base part are opposite.

Further, the first conductive base and the second conductive base are semicircular, and the first conductive base and the second conductive base are respectively located on the left side and the right side of the connecting portion.

Further, the first conductive base has a first surface and the second conductive base has a second surface, the first surface and the second surface being respectively for welding with a tab of a cylindrical battery.

Further, a through hole is formed in the middle of the connecting portion and used for injecting electrolyte.

Further, the connecting portion towards one side of first electrically conductive basal portion is provided with first joint groove, first electrically conductive basal portion corresponds and is provided with first calorie of protruding, first calorie protruding with the mutual joint cooperation in first joint groove.

Further, the connecting portion towards one side of the electrically conductive basal portion of second is provided with second joint groove, the electrically conductive basal portion of second corresponds and is provided with the second card protruding, the second card protruding with the mutual joint cooperation in second joint groove.

Furthermore, a plurality of grooves are formed in the upper surface and the lower surface of the first clamping protrusion and/or the second clamping protrusion, and the grooves are used for embedding plastic.

Further, the first conductive base is made of copper, and at least one surface of the first conductive base is provided with a nickel plating layer.

Furthermore, the connecting part is an insulating plastic part.

The utility model discloses a second of purpose lies in: the cylindrical battery comprises the adapter sheet for the cylindrical battery.

The beneficial effects of the utility model reside in that: an adapter sheet for a cylindrical battery comprises a first conductive base part, a second conductive base part and a connecting part, wherein the first conductive base part and the second conductive base part are connected in an insulating mode through the connecting part, and the first conductive base part and the second conductive base part are opposite in polarity. The utility model provides a pair of switching piece for cylinder battery, first electrically conductive basal portion passes through laser welding fixed connection with an electrode tip (anodal ear or negative pole ear) that the cylinder rolled up the core, the electrically conductive basal portion of second passes through laser welding fixed connection with the other electrode tip of cylinder battery, and be provided with the connecting portion of making through injection moulding technology between first electrically conductive basal portion and the electrically conductive basal portion of second, can reduce spare part manufacturing process cost, furthermore, the volume of cylinder battery has been reduced, and then the energy density of cylinder battery has been improved, not only can solve the processing procedure defect that electric core both ends play utmost point ear and exist, thereby the security performance and the production efficiency of cylinder battery have been improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic view of an interposer according to embodiment 1 of the present invention.

Fig. 2 is a second schematic view of an interposer according to embodiment 1 of the present invention.

Fig. 3 is a partially enlarged view of a in fig. 2.

Fig. 4 is a third schematic view of an interposer according to embodiment 1 of the present invention.

Fig. 5 is a schematic view of a cylindrical battery according to embodiment 2 of the present invention.

Fig. 6 is a second schematic view of the cylindrical battery of embodiment 2 of the present invention.

Fig. 7 is a third schematic view of a cylindrical battery according to embodiment 2 of the present invention.

Fig. 8 is a fourth schematic view of the cylindrical battery of embodiment 2 of the present invention.

Wherein the reference numerals are as follows:

1. a patch; 11. a first conductive base; 11a, a first surface; 111. a first snap projection; 12. a second conductive base; 12a, a second surface; 121. a second snap projection; 13. a connecting portion; 131. a first clamping groove; 132. a second clamping groove; 14. a through hole;

2. a cylindrical battery; 21. a cover plate; 22. a housing; 23. a negative tab; 24. and (6) a positive tab.

Detailed Description

As some terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

The present invention will be described in further detail with reference to fig. 1, but the present invention is not limited thereto.

Example 1

Referring to fig. 1 to 4, an interposer for a cylindrical battery according to embodiment 1 of the present invention includes a first conductive base 11, a second conductive base 12, and a connecting portion 13, where the first conductive base 11 and the second conductive base 12 are connected in an insulating manner by the connecting portion 13, and the first conductive base 11 and the second conductive base 12 have opposite polarities. The utility model provides a pair of adapter plate for cylinder battery, first electrically conductive basal portion 11 passes through laser welding fixed connection with an electrode end that the cylinder rolled up the core, the electrically conductive basal portion 12 of second passes through laser welding fixed connection with the other electrode end of cylinder battery, and be provided with the connecting portion 13 of making through the injection moulding technology between the electrically conductive basal portion 11 of first electrically conductive basal portion 11 and the electrically conductive basal portion 12 of second, can reduce spare part manufacturing process cost, and, the volume of cylinder battery has been reduced, and then the energy density of cylinder battery has been improved, not only can solve the processing procedure defect that electric core both ends play utmost point ear to exist, thereby the security performance and the production efficiency of cylinder battery have been improved.

Specifically, in this embodiment 1, the connection portion 13 is formed by fusing polymer materials such as nano or PP and the like between the first conductive base 11 and the second conductive base 12 through injection molding, so that the first conductive base 11, the second conductive base 12 and the connection portion 13 can form an integrated structure through injection molding and encapsulation, the structural firmness of the interposer is enhanced, meanwhile, the first conductive base 11 and the second conductive base 12 with opposite polarities can be prevented from contacting with each other, short circuit is prevented from occurring, and the safety of the cylindrical battery is improved.

In one embodiment, the connecting portion 13 is an insulating plastic member, which may be formed by injection molding of other high-toughness polymer materials by casting or the like, and includes: nano materials, PP, nylon, resin, PET, etc. In another embodiment, a reinforcing agent such as a fiber material or a nano material is filled in the polymer material having high toughness to enhance the structural stability of the connection portion 13. Of course, the material for preparing the connecting portion 13 is not limited to the above examples, and the application is not limited thereto.

Moreover, because the connecting portion 13 is an insulating plastic member, it has plastic deformation or other deformations, and then when the adaptor sheet and the tab are welded, the stress generated by the first conductive base portion 11 and the second conductive base portion 12 due to the difference of the material shrinkage coefficients can be buffered through the plastic deformation or other deformations, so that the generated stress is eliminated inside the connecting portion 13, and the connection strength between the connecting portion 13 and the first conductive base portion 11 and the second conductive base portion 12 cannot be affected.

Preferably, the first conductive base 11 and the second conductive base 12 in embodiment 1 of the present invention are semicircular, and the first conductive base 11 and the second conductive base 12 are respectively located on the left and right sides of the connecting portion 13. It should be noted that the outer shapes of the first conductive base 11 and the second conductive base 12 are not limited to the semicircular shape defined in embodiment 1, the interposer is not limited to the description of embodiment 1 of the present invention, and may be an oval shape, a fan shape, a square shape, and the like, and accordingly, the shapes of the first conductive base 11 and the second conductive base 12 may be a semi-oval shape, a fan shape, a square shape, and the like.

Preferably, the first conductive base 11 has a first surface 11a, the second conductive base 12 has a second surface 12a, the first surface and the second surface are in a straight shape or a staggered step shape with different heights, and the first surface 11a and the second surface 12a are respectively used for welding with the pole ear of the cylindrical battery. Due to the structural design, the first conductive base part 11 and the second conductive base part 12 can be fully contacted with the positive tab 24 and the negative tab 23 led out from one end of the winding core, and the problem of cold joint is avoided.

Preferably, the middle of the connecting portion 13 in embodiment 1 of the present invention is provided with a through hole 14, and the through hole 14 is used for injecting electrolyte. It should be noted that the through hole 14 can also be disposed at a non-middle position of the connecting portion 13, and the disposed position of the through hole 14 can be set at any position of the connecting portion 13 according to actual production requirements, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention all belong to the protection scope of the present invention.

Preferably, one side of the connecting portion 13 facing the first conductive base 11 is provided with a first clamping groove 131, the first conductive base 11 is correspondingly provided with a first clamping protrusion 111, and the first clamping protrusion 111 and the first clamping groove 131 are mutually clamped and matched. One side of the connecting portion 13 facing the second conductive base portion 12 is provided with a second clamping groove 132, the second conductive base portion 12 is correspondingly provided with a second clamping protrusion 121, and the second clamping protrusion 121 and the second clamping groove 132 are mutually clamped and matched. In this embodiment 1, first joint groove 131 has been seted up to connecting portion 13 one side, second joint groove 132 has been seted up to connecting portion 13 opposite side, first joint groove 131 and the corresponding setting of second joint groove 132, make connecting portion 13 be the I shape structure, the firm in connection between connecting portion 13 and first electrically conductive basal portion 11 and the electrically conductive basal portion 12 of second has been strengthened, and simultaneously, the structural stability of connection piece has still been strengthened, when compressing tightly the switching piece on the cylinder battery utmost point ear through the frock tool, can prevent that first electrically conductive basal portion 11 or the electrically conductive basal portion 12 of second from leading to the condition emergence of perk because firm difference.

Preferably, the upper and lower surfaces of the first protrusion 111 and/or the second protrusion 121 are provided with a plurality of grooves for embedding plastic. Specifically, the grooves are used for embedding plastic, an anchor bolt effect is formed when the connecting part 13 is formed between the first conductive base part 11 and the second conductive base part 12 by adopting an injection molding process, the first conductive base part 11 and the connecting part 13 are bonded and fastened, and the connecting firmness is enhanced by the second conductive base part 12 and the connecting part 13.

Preferably, the first conductive base 11 is made of copper, and at least one surface of the first conductive base 11 is provided with a nickel plating layer, which can prevent corrosion. Correspondingly, the second conductive base 12 is made of an aluminum material.

Example 2

Referring to fig. 5 to 8, embodiment 2 of the present invention provides a cylindrical battery, including the adaptor sheet for cylindrical battery in embodiment 1, the cover plate 21, the case 22, and a winding core (not shown) located inside the case 22, wherein the case 22 is provided with an open opening, and the cover plate 21 covers the open opening and is connected to the case 22 in a sealing manner.

Specifically, the positive and negative electrode sheets and the separator are stacked in the order of "separator/negative electrode sheet/separator/positive electrode sheet" and then wound into a cylindrical winding core, and after winding is completed, the positive electrode tab 24 and the negative electrode tab 23 are led out at the same side.

The positive electrode tab 24 and the negative electrode tab 23 are respectively connected to the winding ends of the positive electrode tab and the negative electrode tab, and the positive electrode tab 24 and the negative electrode tab 23 are respectively the parts of the ends of the positive current collector and the negative current collector which are not coated with the polarity dressing, namely the parts extending outwards from the positive current collector and the negative current collector, so that the tabs and the current collectors are definitely integrated. Specifically, the winding end of the positive electrode sheet is integrally formed with the positive electrode tab 24, the winding end of the negative electrode sheet is integrally formed with the negative electrode tab 23, and the negative electrode tab 23 and the positive electrode tab 24 are located at the same end of the winding core.

In the embodiment 2, the cover plate 21 is further provided with a positive post and a negative post, the positive post and the negative post are insulated from the cover plate 21, the negative post and the first conductive base 11 are connected together by laser welding, and the positive post and the second conductive base 12 are connected together by laser welding.

The specific welding mode is as follows: the adapter plate is welded with a cylindrical battery tab in advance, then a negative pole column and a positive pole column which are positioned on the cover plate 21 are respectively placed with a first conductive base part 11 and a second conductive base part 12 on the adapter plate in a one-to-one correspondence mode, blue laser is output to the surface of the adapter plate through a laser, the blue laser irradiates the surface of the adapter plate, the adapter plate is rapidly melted to form a liquid molten pool with a smaller depth-to-width ratio, the process is carried out in a heat conduction mode, the molten pool is extremely stable, no splashing is generated, and the adapter plate is not influenced by slight change of defocusing amount, then the molten pool starts to be cooled and solidified, and finally a complete welding line is formed, so that the adapter plate is welded with the cover plate 21 pole column of the battery.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should understand that the embodiments as a whole may be combined as appropriate to form other embodiments understood by those skilled in the art.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art based upon the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, such terms are used for convenience of description and are not to be construed as limiting the invention in any way.

Claims

1. The utility model provides a cylinder is adaptor piece for battery which characterized in that: comprises a first conductive base part (11), a second conductive base part (12) and a connecting part (13), wherein the first conductive base part (11) and the second conductive base part (12) are connected in an insulated way through the connecting part (13), and the first conductive base part (11) and the second conductive base part (12) have opposite polarities.

2. The interposer for cylindrical batteries according to claim 1, wherein: the first conductive base (11) and the second conductive base (12) are respectively located on the left and right sides of the connecting portion (13).

3. The interposer for cylindrical batteries according to claim 1, wherein: the first conductive base (11) has a first surface (11 a), the second conductive base (12) has a second surface (12 a), and the first surface (11 a) and the second surface (12 a) are respectively used for welding with a tab of a cylindrical battery.

4. The interposer for cylindrical batteries according to claim 1, wherein: the middle of the connecting part (13) is provided with a through hole (14), and the through hole (14) is used for injecting electrolyte.

5. The interposer for cylindrical batteries according to claim 1, wherein: connecting portion (13) towards one side of first electrically conductive basal portion (11) is provided with first joint groove (131), first electrically conductive basal portion (11) correspondence is provided with first protruding (111) of card, first protruding (111) of card with the mutual joint cooperation of first joint groove (131).

6. The interposer for cylindrical batteries according to claim 5, wherein: connecting portion (13) towards one side of second electrically conductive basal portion (12) is provided with second joint groove (132), second electrically conductive basal portion (12) correspond and are provided with the protruding (121) of second card, the protruding (121) of second card with the mutual joint cooperation in second joint groove (132).

7. The interposer for cylindrical batteries according to claim 6, wherein: the upper surface and the lower surface of the first clamping protrusion (111) and/or the second clamping protrusion (121) are provided with a plurality of grooves, and the grooves are used for embedding plastic.

8. The interposer for cylindrical batteries according to claim 1, wherein: the first conductive base (11) is made of copper, and at least one surface of the first conductive base (11) is provided with a nickel plating layer.

9. The interposer for cylindrical batteries according to claim 1, wherein: the connecting part (13) is an insulating plastic part.

10. A cylindrical battery comprising the interposer for cylindrical battery according to any one of claims 1 to 9.