CN216818553U

CN216818553U - Battery guide sheet structure

Info

Publication number: CN216818553U
Application number: CN202220004835.4U
Authority: CN
Inventors: 苏家贤; 周圣轩
Original assignee: Celxpert Energy Corp
Current assignee: Celxpert Energy Corp
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-24
Anticipated expiration: 2032-01-04

Abstract

The application discloses battery guide vane structure for weld in the electrode of battery end. The battery lead structure comprises a lead body, a connecting part and at least two electrode connecting sheets. The connecting part extends from the inner edge of the guide sheet body to the inner in an inclined manner, the electrode connecting sheet extends from the inner edge of the connecting part to the inner in an inclined manner, and only one end of the electrode connecting sheet is connected with the connecting part. The electrode connecting sheet is provided with at least one salient point structure which protrudes out of one side of the electrode connecting sheet. So, when the battery guide vane structure is carrying out spot welding operation, can more effectively laminate in the electrode end of electromagnetism, improve spot welding quality, avoid droing and contact failure scheduling problem.

Description

Battery guide sheet structure

Technical Field

The present disclosure relates to a battery lead structure, and more particularly, to a lead structure for electrically connecting a battery.

Background

The electrode end of the battery in the prior art is provided with battery guide sheets, and the battery guide sheets are connected and integrated with other wires, so that the battery can be electrically connected with other electrical appliances through the wires and provide required electric energy. However, most of the conventional battery leads are flat sheets, so that the battery leads cannot be in complete spot welding contact with the electrodes of the battery due to incomplete stress between the spot welding machine and the battery leads in the spot welding process, and further the battery leads are in poor contact and even fall off.

Therefore, how to overcome the above-mentioned drawbacks by improving the structural design has become one of the important issues to be solved in this field.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will solve lies in, provides a battery guide piece structure to prior art's not enough, can with the electrode spot welding contact completely of battery, solve the problem that battery contact failure and battery guide piece drop.

In order to solve the above technical problem, the present application provides a battery lead structure for being welded to an electrode terminal of a battery, the battery lead structure including a lead body, a connecting portion and at least two electrode connecting tabs. The guide vane body is annular, the periphery of the guide vane body extends outwards to form at least one fixing part, and a longitudinal direction is defined along the fixing part; the connecting part is annular and extends inwards in an inclined way from the inner edge of the guide vane body; at least two electrode connecting sheets respectively extend inwards from the inner edge of the connecting part, each electrode connecting sheet is provided with at least one salient point structure, and the salient point structure protrudes out of one side of the electrode connecting sheet; wherein only one end of the electrode connecting sheet is connected with the connecting part, and the other end of the electrode connecting sheet forms a free end; wherein the electrode connecting sheet and the guide sheet body are not positioned on the same plane.

Optionally, the at least two electrode connecting pieces are respectively located on two sides of the diameter of the inner edge of the connecting portion, the at least two electrode connecting pieces extend in opposite directions, and a space is formed between the at least two electrode connecting pieces.

Optionally, the longitudinal direction is parallel to a diameter of the connecting portion.

Optionally, the ratio of the pitch to the length of the electrode connection tabs is 1: 10.

Optionally, the inner edge of the connecting portion has a diameter less than or equal to the diameter of the electrode end of the battery.

Optionally, the electrode connection tabs have a length to width ratio of 8: 3.

Optionally, at least two electrode connecting sheets have two bump structures, and the two bump structures protrude from one side far away from the lead body.

Optionally, the cell lead structure has four electrode tabs, any two of which are symmetrical to each other.

Optionally, the ratio of the length and width of the electrode connection pad to the inner edge of the bump structure to the connection part is 4.3:2.3: 2.7.

Optionally, the material of the at least two electrode connecting pieces is selected from the group consisting of copper metal, nickel metal and copper sulfide.

The battery lead structure has the advantages that through the technical characteristic that only one end of the electrode connecting sheet is connected with the connecting part, so that the other end of the electrode connecting sheet is a free end, when the spot welding operation is carried out on the salient point structure on the electrode connecting sheet and the electrode end on the battery, the spot welding quality is improved, the connection relation between the battery lead and the electrode end of the battery is stabilized, the problem of insufficient tension caused by insecure spot welding is avoided, and the problems of falling and poor contact are solved.

For a better understanding of the nature and technical content of the present application, reference should be made to the following detailed description and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the present application.

Drawings

Fig. 1 is a perspective view of a battery lead structure according to a first embodiment of the present application.

Fig. 2 is a schematic plan view of a battery lead structure according to a first embodiment of the present application.

Fig. 3 is a schematic sectional view along the sectional line III-III of fig. 2.

Fig. 4 is a schematic view of the connection of a cell lead structure of the first embodiment of the present application to the electrode terminals of a cell.

Fig. 5 is a perspective view of a battery lead structure according to a second embodiment of the present application.

Fig. 6 is a schematic plan view of a battery lead structure according to a second embodiment of the present application.

Fig. 7 is a schematic sectional view taken along line VII-VII of fig. 6.

Detailed Description

The following is a description of the embodiments of the "cell lead structure" disclosed in the present application with reference to specific embodiments, and those skilled in the art will understand the advantages and effects of the present application from the disclosure of the present application. The present application is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the present application. The drawings in the present application are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present application in detail, but the disclosure is not intended to limit the scope of the present application. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

First embodiment

Referring to fig. 1 to 4, a first embodiment of the present application provides a battery lead structure 100a for welding to an electrode terminal BE of a battery B. The battery B can be a 18650 type lithium battery and can be applied to an electric vehicle, an electric drill or other electric tools. The battery is not within the scope of the present application and therefore will not be described in detail. In addition, the application is not limited to 18650 type lithium batteries, and can also be applied to cylindrical batteries of other types, and the battery guide sheet structure is only required to be matched with the battery size to be reduced or enlarged in an equal proportion.

The battery lead structure 100a includes a lead body 11, a connecting portion 13, and at least two electrode connecting tabs 15 a. The guide vane body 11 is annular, the guide vane body 11 may be polygonal or circular, and the annular shape of the guide vane body 11 is not limited thereto. In the present embodiment, the ring shape of the guide vane body 11 is described as a circle. The periphery of the guide vane body 11 extends outward in two opposite directions to form at least one fixing portion 111, and the two fixing portions 111 are used for illustration in this embodiment. The two fixing portions 111 extending outward in opposite directions define a longitudinal direction LD (as shown in fig. 2). At least one fixing portion 111 is used to fix the battery lead structure 100a to the battery B. The electrode connecting piece 15a, the lead body 11 and the connecting portion 13 may be made of a material selected from copper, nickel or copper sulfide.

The connecting portion 13 is annular, the connecting portion 13 may be polygonal or circular, and the annular shape of the connecting portion 13 is not limited thereto. In the present embodiment, the ring shape of the connecting portion 13 is described as a circle. The connecting part 13 extends from the inner edge of the guide vane body 11 to incline inwards. That is, the connecting portion 13 and the guide vane body 11 are not located on the same plane (as shown in fig. 3). The connecting portion 13 has a height difference H, which is a vertical distance between the lead body 11 and the electrode connecting piece 15 a.

As shown in fig. 3, the connecting portion 13 has a slope θ, the slope θ of the connecting portion 13 is an angle between the guide vane body 11 and the connecting portion 13, the range of the slope θ is between 90 degrees and 150 degrees, and the slope θ is preferably 135 degrees. When the inclination θ is 90 degrees, both the guide vane body 11 and the connecting portion 13 are perpendicular to each other. The inner edge diameter IL of the connecting portion 13 is smaller than or equal to the electrode terminal BE diameter BEL of the battery B. That is, the connection part 13 can necessarily correspond to the electrode terminal BE of the battery B (as shown in fig. 4).

Referring to fig. 2 and 3 again, the two electrode connecting pieces 15a extend inward from the inner edge of the connecting portion 13, the two electrode connecting pieces 15a are located on two sides of the inner edge diameter IL of the connecting portion 13, wherein the inner edge diameter IL of the connecting portion 13 may be parallel to the longitudinal direction LD of the lead body 11, so that the electrode connecting pieces 15a and the lead body 11 are as shown in fig. 1, and the two electrode connecting pieces 15a form a separation groove S1 on the inner edge of the connecting portion 13, and the separation groove S1 is S-shaped. The inner edge diameter IL of the connecting portion 13 may not be parallel to the longitudinal direction LD of the lead body 11, so that the extending direction of the electrode connecting piece 15a is perpendicular to the longitudinal direction LD of the lead body 11. The two electrode connection tabs 15a extend inwardly in opposite directions.

In this embodiment, the two electrode connecting pieces 15a are not connected, and a distance D (shown in fig. 1) is provided between the two electrode connecting pieces 15 a. Wherein the ratio of the distance D to the length L to the width W of the electrode connecting piece 15a is 0.8:8: 3. That is, the ratio of the pitch D to the length of the electrode connection piece 15a is 1:10, and the ratio of the length L to the width W of the electrode connection piece 15a is 8: 3. In a preferred embodiment, the ratio of the distance D to the length of the electrode connecting piece 15a may be 1:8, and the ratio of the length L to the width W of the electrode connecting piece 15a is 8: 2. In addition, the ratio of the height difference H to the distance D is between 7/8 and 1. The distance D between the two electrode connecting pieces 15a is preferably 0.8mm (millimeter), the length L and the width W of the electrode connecting pieces 15a are respectively 8mm (millimeter) and 3mm (millimeter), and the height difference H is between 0.7mm (millimeter) and 0.8mm (millimeter). The thickness of the electrode connection piece 15a is about 0.2 mm. The ratio of the circumference of the inner edge of the connecting portion 13 to the length L of the electrode connecting piece 15a is 11.5:8, and a preferable value of the circumference of the inner edge of the connecting portion 13 is 11.5 mm.

Only one end of the electrode connecting piece 15a is in contact with the connecting portion 13, that is, the other end of the electrode connecting piece 15a forms a free end. When a spot welding machine (not shown) performs spot welding operation on the electrode connecting piece 15a and the electrode terminal BE of the battery B, because only one end of the electrode connecting piece 15a is connected with the connecting part 13, the free end of the electrode connecting piece 15a is close to the electrode terminal BE of the battery B downwards through a fulcrum (namely, the joint of the electrode connecting piece 15a and the connecting part 13), so that the connection relation between the battery lead structure 100a and the electrode terminal BE of the battery B is stabilized, and the problems of falling and poor contact are avoided.

Each electrode connecting piece 15a may have at least one bump structure 151, the number of the bump structures 151 may also be one, two, three or more, the bump structures 151 protrude from one side of the electrode connecting piece 15a, and the bump structures 151 protrude from one side away from the lead body 11. In other words, the bump structures 151 protrude from the side close to the electrode terminals BE of the battery B, so that the bump structures 151 and the electrode terminals BE can BE spot-welded more effectively when spot-welding is performed. Each electrode connecting piece 15a of the present embodiment has two bump structures 151 thereon.

Second embodiment

This embodiment is similar to the first embodiment, and therefore the similarities between the two embodiments are not repeated (e.g., the guide vane body 11, the connecting portion 13, and the bump structure 151).

Referring to fig. 5 to 7, the present embodiment provides a battery lead structure 100b, which includes a lead body 11, a connecting portion 13 and four electrode connecting pieces 15 b. The four electrode connecting pieces 15b are extended inward from the inner edges of the connecting portions 13, respectively. Any two electrode connecting pieces 15b of the four electrode connecting pieces 15b may be symmetrical to each other two by two (as shown in fig. 5) and the four electrode connecting pieces 15b are not connected. The four electrode connecting pieces 15b are formed with a separating groove S2 on the inner edge of the connecting portion 13, the separating groove S2 being of a quincunx shape. The electrode connecting piece 15b may be made of a material selected from copper, nickel, or copper sulfide.

The connecting portion 13 has a height difference H, which is a vertical distance between the lead body 11 and the electrode connecting piece 15 b.

Each electrode connecting piece 15b has at least one bump structure 151 thereon. The bump structure 151 has a distance DD to an inner edge of the connection portion 13. The ratio of the length L, width W, and distance DD of the electrode connection piece 15b is 4.3:2.4: 2.7. In a preferred embodiment, the ratio of the length L, the width W and the distance DD of the electrode connecting piece 15b may be 4.2:2.1: 2.5. The length L and the width W of the electrode connecting sheet 15b are preferably 4.3mm and 2.4mm, respectively, and the optimal value of the distance DD is 2.7 mm. Therefore, when the spot welding work is performed, the bump structures 151 on the electrode connecting pieces 15B can be surely and effectively spot-welded to the electrode terminals B of the cells B under the conditions of the distance DD of 2.7mm and the width W of 2.4 mm.

Advantageous effects of the embodiments

The disclosure is only an alternative embodiment and is not intended to limit the scope of the claims, so that all equivalent technical changes made by using the contents of the specification and the drawings are included in the scope of the claims.

Claims

1. A battery lead structure for welding to an electrode terminal of a battery, the battery lead structure comprising:

the guide vane comprises a guide vane body, wherein the guide vane body is annular, the periphery of the guide vane body extends outwards to form at least one fixing part, and a longitudinal direction is defined along the fixing part;

the connecting part is annular and extends inwards in an inclined mode from the inner edge of the guide sheet body; and

at least two electrode connecting sheets respectively extending inwards from the inner edge of the connecting part, wherein each electrode connecting sheet is provided with at least one salient point structure, and the salient point structure protrudes out of one side of the electrode connecting sheet;

only one end of the electrode connecting sheet is connected with the connecting part, and the other end of the electrode connecting sheet forms a free end;

wherein the electrode connecting sheet and the guide sheet body are not positioned on the same plane.

2. The battery lead structure of claim 1, wherein the at least two electrode connecting tabs are located on both sides of the diameter of the inner edge of the connecting portion, respectively, and extend in opposite directions with a space therebetween.

3. The battery lead structure of claim 2, wherein the lengthwise direction is parallel to a diameter of the connecting portion.

4. The battery lead structure of claim 2, wherein the ratio of the pitch to the length of the electrode connecting tab is 1: 10.

5. The battery lead structure according to claim 1, wherein the inner edge of the connecting part has a diameter less than or equal to the diameter of the electrode terminal of the battery.

6. The battery lead structure of claim 1, wherein the electrode connecting tab has a length to width ratio of 8: 3.

7. The battery lead structure of claim 1, wherein the at least two electrode tabs have two of the bump structures protruding from a side away from the lead body.

8. The battery lead structure of claim 1, wherein the battery lead structure has four electrode tabs, any two of which are symmetrical to each other.

9. The battery lead structure of claim 8, wherein the ratio of the length and width of the electrode connecting tab to the inner edge of the connecting portion of the bump structure is 4.3:2.3: 2.7.

10. The battery lead structure of claim 1, wherein the material of at least two of the electrode tabs is selected from the group consisting of copper metal, nickel metal, and copper sulfide.