CN212571258U

CN212571258U - Pin structure and secondary battery

Info

Publication number: CN212571258U
Application number: CN202021396113.5U
Authority: CN
Inventors: 陈虎; 杨伟; 何庆庆; 戴亨伟; 徐卫东
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-02-19
Anticipated expiration: 2030-07-15

Abstract

The utility model relates to a pin structure and secondary battery. The utility model provides a pin structure, includes utmost point post connecting portion, follows the transition portion that the lateral buckling of utmost point post connecting portion extended to form and with transition portion keeps away from the utmost point ear connecting portion that one side of utmost point post connecting portion is connected, be equipped with the strengthening rib on the pin, the strengthening rib is followed utmost point ear connecting portion to transition portion one side is extended, until extending to utmost point post connecting portion. The pin structure remarkably improves the strength of the pin, particularly the strength of the transition part and the pole connecting part, and the pin structure is not easy to change into or break.

Description

Pin structure and secondary battery

Technical Field

The utility model relates to a battery technology field especially relates to a pin structure and secondary battery.

Background

With the increasingly prominent environmental problems, low-carbon economy has become the mainstream of future economic development. The new energy also gradually replaces the traditional environmental pollution type energy, and the power battery is gradually accepted by mass manufacturers and consumers as a representative of the new energy. The power battery is used as a main power source of the new energy automobile and becomes one of the key parts of the electric automobile.

As a key component of the power battery, the top cover structure of the power battery has a significant influence on the energy density, the economy and the safety of the power battery. Because various vibrations and impacts of power battery in actual conditions require that power battery cell structural component has higher mechanical strength, avoid mechanical component to take place to warp or fracture and influence performance and the security of electric core in vibration and impact process. The traditional pin structure is poor in strength, and in the vibration test or actual working condition process, the pin is often seriously deformed, and even the stress concentration part of the pin is broken to cause the failure of the battery cell.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a lead structure with higher strength.

In addition, a secondary battery is also provided.

The utility model provides a pin structure, includes utmost point post connecting portion, follows the transition portion that the lateral buckling of utmost point post connecting portion extended to form and with transition portion keeps away from the utmost point ear connecting portion that one side of utmost point post connecting portion is connected, the structural strengthening rib that is equipped with of pin, the strengthening rib is followed utmost point ear connecting portion to transition portion one side is extended, until extending to utmost point post connecting portion.

Above-mentioned pin structure includes utmost point post connecting portion, the transition portion that extends formation along the lateral buckling of utmost point post connecting portion and the utmost point ear connecting portion of being connected with one side that utmost point post connecting portion were kept away from to transition portion, is equipped with the strengthening rib on the pin, and the strengthening rib extends to transition portion one side from utmost point ear connecting portion until extending to utmost point post connecting portion, is showing the intensity that has improved the pin, especially the intensity of transition portion and utmost point post connecting portion, and makes the difficult appearance of pin structure become or cracked problem.

In one embodiment, the transition part is a plate-shaped structure, and the projections of the reinforcing ribs on the plane of the transition part are on a straight line.

In one embodiment, the pole connecting part is a plate-shaped structure, and an included angle between the pole connecting part and the transition part is 85-95 degrees.

In one embodiment, the ribs on the transition section are all part of the transition section.

In one embodiment, the tab connecting portion includes a bored area connected to the transition portion, and a first weld area and a second weld area located on opposite sides of the bored area, the first weld area and the second weld area being formed by bending and extending the bored area inward or outward, the bored area being bored with a weld hole located between the first weld area and the second weld area, and the reinforcing rib extending from the bored area on a side of the weld hole close to the transition portion toward the transition portion.

In one embodiment, the first land and the second land are each a plate-shaped structure, the first land and the second land are each bent inward, and the first land and the second land are arranged in parallel.

In one embodiment, the dug hole region has a plate-like structure, and the first land and the second land are perpendicular to the dug hole region.

In one embodiment, the pole connecting part is provided with a pole connecting hole.

In one embodiment, the pole connecting portion is further provided with a positioning hole, and the positioning hole is located on one side, away from the transition portion, of the pole connecting hole.

The utility model provides a secondary battery, includes utmost point post, utmost point ear and foretell pin structure, pin structure will utmost point post with the utmost point ear electricity is connected.

Drawings

Fig. 1 is a schematic structural diagram of a pin structure according to an embodiment.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The secondary battery of an embodiment includes a post, a tab, and a pin structure 10, wherein the pin structure 10 electrically connects the post and the tab. The lead structure 10 is a metal structure. For example, the lead structure 10 is copper or aluminum. Specifically, the lead structure 10 includes a pole connecting portion 100, a transition portion 200, and a tab connecting portion 300.

The pole connecting portion 100 is provided with a pole connecting hole 110. The pole can be electrically connected to the pole connecting portion 100 by the pole connecting hole 110 using a caulking structure. Further, the post connecting portion 100 is further provided with a positioning hole 120, and the positioning hole 120 can position the post connecting portion 100. Further, the positioning hole 120 is plural. In the illustrated embodiment, there are two positioning holes 120. Specifically, the pole connecting portion 100 has a plate-like structure.

The transition portion 200 is formed by bending and extending along one side of the pole connecting portion 100. The positioning hole 120 is located on a side of the pole connecting hole 110 away from the transition portion 200. Specifically, the transition portion 200 is a plate-like structure.

Furthermore, the included angle between the pole connecting part 100 and the transition part 200 is 85-95 degrees, the bending angle between the pole connecting part 100 and the transition part 200 is large, so that the bending stress at the connecting part of the pole connecting part 100 and the transition part 200 is small, and the pole connecting part is not easy to deform or break.

In one embodiment, the two sides of the transition portion 200 in the width direction are recessed to fit the convex hull of the bipolar tab for convenient placement between the bipolar tabs.

Utmost point ear connecting portion 300 and transition portion 200 keep away from one side of utmost point post connecting portion 100 and are connected, are equipped with strengthening rib 400 on the pin structure 10, and strengthening rib 400 extends to transition portion 200 one side from utmost point ear connecting portion 300 until extending to utmost point post connecting portion 100, and strengthens utmost point post connecting portion 100 and transition portion 200's joint strength, further improves pin structure 10's intensity, avoids producing and warp or cracked problem.

Further, the projections of the reinforcing ribs 400 on the plane where the transition portion 200 is located are on the same straight line, so that the process of the reinforcing ribs 400 is simple, and the manufacturing cost of the pin structure 10 is reduced. Furthermore, the reinforcing ribs 400 on the transition portion 200 are all used to divide the transition portion 200, so that the stress applied to the transition portion 200 is uniform, and the strength of the transition portion 200 is improved.

Specifically, the tab connection part 300 includes a hole-digging region 310 connected to the transition part 200, and a first welding region 320 and a second welding region 330 located on opposite sides of the hole-digging region 310, the first welding region 320 and the second welding region 330 are formed by bending and extending the hole-digging region 310 inward or outward, the hole-digging region 310 is provided with a welding hole 311, the welding hole 311 is located between the first welding region 320 and the second welding region 330, and the reinforcing rib 400 extends from the hole-digging region 310 on a side of the welding hole 311 close to the transition part 200 to a side of the transition part 200. The welding holes 311 are arranged to facilitate the welding device to extend into the welding holes 311 to weld the first welding region 320 and the second welding region 330 with the tabs. The reinforcing rib 400 is formed by pressing on the pin structure 10 by using equipment, and a concave pit is formed on one surface of the pin structure 10, and a convex bulge is formed on the other surface of the pin structure, so that the structure strengthening effect is achieved.

Further, the first welding area 320 and the second welding area 330 are both plate-shaped structures, the first welding area 320 and the second welding area 330 are both bent inward, and the first welding area 320 and the second welding area 330 are arranged in parallel, which is beneficial for the first welding area 320 and the second welding area 330 to be abutted with the tab.

Further, the dug area 310 is a plate-shaped structure, and the first welding area 320 and the second welding area 330 are perpendicular to the dug area 310.

The above-mentioned pin structure 10 has at least the following advantages:

1) above-mentioned pin structure 10 includes utmost point post connecting portion 100, the transition portion 200 that forms and the utmost point ear connecting portion 300 of being connected of one side of keeping away from utmost point post connecting portion 100 with transition portion 200 along the one side bending type extension of utmost point post connecting portion 100, be equipped with strengthening rib 400 on the pin, strengthening rib 400 extends to transition portion 200 one side from utmost point ear connecting portion 300, until extending to utmost point post connecting portion 100, show the intensity that has improved the pin, especially the intensity of transition portion 200 and utmost point post connecting portion 100, and make pin structure 10 difficult the appearance become or cracked problem.

2) The included angle between the post connecting portion 100 and the transition portion 200 of the pin structure 10 is 85 degrees to 95 degrees, the bending angle between the post connecting portion 100 and the transition portion 200 is large, and the bending stress at the connection position of the post connecting portion 100 and the transition portion 200 is small and is not easy to deform or break.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a pin structure, its characterized in that includes utmost point post connecting portion, follows the transition portion that the lateral buckling of utmost point post connecting portion extended to form and with transition portion keeps away from utmost point ear connecting portion that one side of utmost point post connecting portion is connected, the structural strengthening rib that is equipped with of pin, the strengthening rib is followed utmost point ear connecting portion to transition portion one side is extended, until extending to utmost point post connecting portion.

2. The lead structure of claim 1, wherein the transition portion is a plate-shaped structure, and a projection of the stiffener on a plane of the transition portion is aligned with a straight line.

3. The pin structure according to claim 2, wherein the post connecting portion is a plate-shaped structure, and an included angle between the post connecting portion and the transition portion is 85 ° to 95 °.

4. The lead structure of claim 1, wherein the stiffener over the transition portion bisects the transition portion.

5. The pin structure according to claim 1, wherein the tab connection portion includes a cutout region connected to the transition portion, and a first land and a second land located on opposite sides of the cutout region, the first land and the second land being formed by bending and extending the cutout region to an inner side or an outer side, the cutout region being opened with a welding hole located between the first land and the second land, the reinforcing rib extending from the cutout region on a side of the welding hole closer to the transition portion toward the transition portion.

6. The pin structure according to claim 5, wherein the first land and the second land are each a plate-like structure, the first land and the second land are each bent inward, and the first land and the second land are arranged in parallel.

7. The pin structure of claim 6, wherein the cutout region is a plate-like structure, and the first land and the second land are both perpendicular to the cutout region.

8. The pin structure according to claim 1, wherein the post connecting portion is provided with a post connecting hole.

9. The pin structure according to claim 8, wherein a positioning hole is further formed in the post connecting portion, and the positioning hole is located on one side, away from the transition portion, of the post connecting hole.

10. A secondary battery comprising a post, a tab and the pin structure of any one of claims 1 to 9, wherein the pin structure electrically connects the post and the tab.