CN218940076U

CN218940076U - Negative electrode adapter plate of battery

Info

Publication number: CN218940076U
Application number: CN202320108382.4U
Authority: CN
Inventors: 伞颖; 雷丽萍
Original assignee: Shenzhen Bona New Energy Technology Co ltd
Current assignee: Shenzhen Bona New Energy Technology Co ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-04-28
Anticipated expiration: 2033-02-03

Abstract

The utility model relates to the technical field of batteries, and discloses a negative electrode switching sheet of a battery, which comprises a substrate; the middle part of the substrate is provided with a through hole, the inner side of the through hole is connected with a spiral spring piece, the spiral spring piece is conical spiral, and the tail end of the larger end of the spiral spring piece is connected with the inner side of the through hole; the tail end of the smaller end of the spiral spring plate is connected with a center plate, and the center plate is parallel to the substrate; the projection of the surface where the through hole port is located of each spiral spring piece and each center piece is not interfered, and the through hole is covered; the utility model is used for realizing conduction by contacting with the battery cathode, can provide contact elasticity and ensures certain compactness at the contact moment; the negative electrode transfer sheet and the battery negative electrode can form larger contact effective area, so that good conductivity and contact stability are ensured, and the use safety is improved.

Description

Negative electrode adapter plate of battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a negative electrode switching piece of a battery.

Background

The negative electrode switching piece of the battery is used for contacting with the negative electrode of the battery and transmitting internal and external electric energy. In the prior art, as disclosed in the utility model patent with publication number of CN209401696U, the negative electrode contact part comprises a conical spiral second spring, so that good elastic contact is mainly provided for the button cell, and the elasticity is not reduced after long-term use; however, the spring structure formed by adopting the spiral of the round strip-shaped structure is small in contact effective area with the battery cathode due to the fact that the cross section of each part of the spring structure is round after the spring structure is compressed, and the spiral spring cannot be fully matched with the battery cathode for full contact due to the fact that the battery cathode is provided with annular protrusions or grooves. In the prior art, the utility model patent negative electrode switching sheet with the publication number of CN217881800U, a battery cover plate and a battery, wherein the negative electrode switching sheet adopts a sheet structure, and the sheet structure can be in omnibearing contact with a negative electrode of the battery, but can not provide good elastic contact, and the negative electrode switching sheet and the battery are required to be supported by an external good fixing and shock-resistant structure.

Disclosure of Invention

The utility model aims to solve the problem that the contact area and the elastic contact of a negative electrode switching sheet of a battery cannot be compatible in the prior art, and provides the negative electrode switching sheet of the battery.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a negative electrode tab for a battery comprising a substrate; the middle part of the substrate is provided with a through hole, the inner side of the through hole is connected with a spiral spring piece, the spiral spring piece is conical spiral, and the tail end of the larger end of the spiral spring piece is connected with the inner side of the through hole; the tail end of the smaller end of the spiral spring plate is connected with a center plate, and the center plate is parallel to the substrate; the projection of the surface where the through hole port is located of each spiral spring piece and the central piece is not interfered, and the through hole is covered.

Further, a guide piece is connected to the middle of one side of the substrate, and a connecting hole is formed in the tail end of the guide piece; the substrate, the guide piece, the spiral spring piece and the center piece are all conductors.

Further, the middle part of the substrate is bent towards the side of the spiral elastic sheet to form an annular bending part, the bending part comprises an annular vertical part which is vertically connected with the substrate, the bending part further comprises a parallel part which is connected with the vertical part, the parallel part is parallel to the substrate, and the through hole is arranged in the middle of the parallel part.

Further, the substrate, the bending part, the spiral spring sheet and the central sheet are of an integrated connection structure.

Further, a disc-shaped supporting body is placed on the inner side of the bending part, a plurality of clamping blocks are uniformly distributed on the circumference of the outer side edge of the supporting body, and the clamping blocks are connected with the inner side of the bending part.

Further, the connection mode of the clamping block and the inner side of the bending part is welding.

Further, the spiral spring plate and the center plate can be compressed into a plane sheet structure and filled in the through hole; the outer side of the plane sheet-shaped structure part corresponding to the spiral elastic sheet is provided with a bulge.

Further, the bulge is provided with a plurality of circles, and each circle is provided with a plurality of circles and is uniformly distributed on the circumference; the profile of each protrusion is identical.

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

1. the utility model realizes conduction by contacting with the battery cathode, and can provide contact elasticity and ensure certain compactness at the contact moment by utilizing the spiral elastic structure; after compression, a sheet structure is formed, so that a larger contact effective area can be formed between the negative electrode switching sheet and the battery negative electrode, good conductivity and contact stability are ensured, and the use safety is improved;

2. the bulges distributed circumferentially can be matched with the battery cathode with the annular groove, so that the functions of limiting and guaranteeing the contact area are achieved, and the contact conductivity stability is improved.

Drawings

Fig. 1 is a schematic view showing a top perspective structure of a first embodiment of the present utility model.

Fig. 2 is a schematic side view of a first embodiment of the present utility model.

Fig. 3 is a schematic top view of a first embodiment of the present utility model.

Fig. 4 is a schematic view showing a lower side three-dimensional structure of a first embodiment of the present utility model.

Fig. 5 is a schematic perspective view showing a compressed state of a helical spring according to a first embodiment of the present utility model.

Fig. 6 is a schematic perspective view illustrating a compressed state of a helical spring according to a second embodiment of the present utility model.

Fig. 7 is a schematic top view of a second embodiment of the present utility model.

In the figure: 1. a substrate; 2. guiding sheets; 3. a connection hole; 4. a through hole; 5. a spiral spring plate; 6. a center piece; 7. a bending part; 8. a support body; 9. a clamping block; 10. a protrusion; 71. a parallel portion; 72. a vertical portion.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

The present utility model is described in further detail below with reference to examples.

Specific example 1 of a negative electrode tab of a battery provided by the present utility model:

referring to fig. 1 to 5, a negative electrode tab of a battery includes a base sheet 1; the middle part of one side of the substrate 1 is connected with a guide piece 2, and the tail end of the guide piece 2 is provided with a connecting hole 3; the lead piece 2 and the connecting hole 3 are connected with an external electric wire to transmit electric energy.

The middle part of the substrate 1 is bent to one side to form an annular bending part 7, the bending part 7 comprises an annular vertical part 72 which is vertically connected with the substrate 1, the bending part 7 further comprises a parallel part 71 which is connected with the vertical part 72, and the parallel part 71 is parallel to the substrate 1.

The middle part of the parallel part 71 is provided with a through hole 4, the inner side of the through hole 4 is connected with a spiral spring piece 5, the spiral spring piece 5 is conical spiral, and the tail end of the larger end of the spiral spring piece 5 is connected with the inner side of the through hole 4; the smaller end of the spiral spring 5 is connected with a center piece 6, and the center piece 6 is parallel to the substrate 1. The spiral spring piece 5 adopts an elastic piece and has elasticity by utilizing a spiral structure, so that the elastic contact with the battery cathode is ensured.

The projections of the surfaces of the spiral spring plate 5 and the central plate 6, where the ports of the through holes 4 are located, do not interfere, and cover the through holes 4; the spiral spring 5 and the central piece 6 can be compressed into a planar sheet structure and filled in the through hole 4. The spiral spring piece 5 and the central piece 6 are compressed to form a piece-shaped structure, so that the battery cathode has a larger contact area.

The substrate 1, the guide piece 2, the spiral spring piece 5 and the center piece 6 are all conductors so as to realize stable electric energy transmission. The base sheet 1, the bending part 7, the spiral spring sheet 5 and the central sheet 6 are of an integral connection structure, wherein the bending part 7 is formed by stamping.

A disc-shaped supporting body 8 is arranged at the inner side of the bending part 7; four clamping blocks 9 are uniformly connected with the circumference of the opening at the back side of the bending part 7, and the clamping blocks 9 are welded with the inner side of the bending part 7; the clamping blocks 9 form limit positions for the supporting body 8. The supporting body 8 can support the compressed spiral spring piece 5 and the central piece 6, so that the compressed spiral spring piece 5 and the central piece form a planar sheet structure, flatness is guaranteed, deformation is reduced, and the effective contact area between the compressed spiral spring piece 5 and the battery cathode is increased.

Specific example 2 of the negative electrode tab of the battery provided by the present utility model:

the difference between this embodiment and embodiment 1 is that in this embodiment, when the spiral spring 5, the spiral spring 5 and the center piece 6 are compressed into a planar sheet structure, the protrusions 10 are provided on the outer side of the planar sheet structure portion corresponding to the spiral spring 5, as shown in fig. 6 and 7.

In the embodiment, the protrusions 10 are arranged in two circles, and a plurality of the circles are uniformly distributed on the circumference; the projections 10 have the same shape. Wherein, some bulges 10 are integrally arranged on the upper side of the same position of the spiral elastic sheet 5; the other protrusion 10 is divided into two parts, which are respectively located at two different upper sides of the spiral spring 5, and after the spiral spring 5 is flattened, the two corresponding parts form a complete protrusion 10. In this embodiment, the protruding 10 structure of negative pole change-over piece can laminate better with the battery that the negative pole has the annular groove, realizes stable contact and spacing cooperation.

It should be noted that the above description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A negative electrode tab for a battery, comprising a base sheet (1); the method is characterized in that: the middle part of the substrate (1) is provided with a through hole (4), the inner side of the through hole (4) is connected with a spiral spring piece (5), the spiral spring piece (5) is conical spiral, and the tail end of the larger end of the spiral spring piece (5) is connected with the inner side of the through hole (4); the tail end of the smaller end of the spiral spring piece (5) is connected with a center piece (6), and the center piece (6) is parallel to the substrate (1); the projections of the surfaces of the spiral spring plate (5) and the central plate (6) at the ports of the through holes (4) are all free from interference, and the through holes (4) are covered.

2. The negative electrode tab of a battery according to claim 1, wherein: the middle part of one side of the substrate (1) is connected with a guide piece (2), and the tail end of the guide piece (2) is provided with a connecting hole (3); the substrate (1), the guide piece (2), the spiral spring piece (5) and the center piece (6) are all conductors.

3. The negative electrode tab of a battery according to claim 1, wherein: the middle part of the substrate (1) is bent towards the side of the spiral elastic sheet (5) to form an annular bending part (7), the bending part (7) comprises an annular vertical part (72) which is vertically connected with the substrate (1), the bending part (7) further comprises a parallel part (71) which is connected with the vertical part (72), the parallel part (71) is parallel to the substrate (1), and the through hole (4) is arranged in the middle of the parallel part (71).

4. The negative electrode tab of a battery according to claim 3, wherein: the substrate (1), the bending part (7), the spiral spring piece (5) and the central piece (6) are of an integral connection structure.

5. The negative electrode tab of a battery according to claim 3, wherein: a disc-shaped supporting body (8) is placed on the inner side of the bending part (7), a plurality of clamping blocks (9) are uniformly distributed on the circumference of the outer side edge of the supporting body (8), and the clamping blocks (9) are connected with the inner side of the bending part (7).

6. The negative electrode tab of the battery according to claim 5, wherein: the clamping block (9) is welded with the inner side of the bending part (7).

7. The negative electrode tab of a battery according to claim 1, wherein: the spiral spring piece (5) and the center piece (6) can be compressed into a plane sheet structure and are filled in the through hole (4); the outer side of the plane sheet structure part corresponding to the spiral spring piece (5) is provided with a bulge (10).

8. The negative electrode tab of the battery according to claim 7, wherein: the bulge (10) is provided with a plurality of circles, and each circle is provided with a plurality of circles and is uniformly distributed on the circumference; the profile of each protrusion (10) is identical.