Secondary battery pin

Abstract

This utility model provides a secondary battery pin. The pin body includes a terminal connection part and a tab connection part. The terminal connection part is used to connect the battery terminal, and the tab connection part is used to connect the battery tab. The terminal connection part and the tab connection part are connected by a connecting part. The tab connection part is composed of a horizontal plate and a vertical plate forming an inverted L-shaped structure, and an adjustment space is formed below the horizontal plate and on one side of the vertical plate. An adjustment plate is installed in the adjustment space, and the upper end of the adjustment plate is slidably connected to the lower end of the horizontal plate. A bolt is used to connect the pin body and the adjustment plate. This utility model adopts an open assembly structure, which not only solves the problem of the size of the welding fixture adaptation point, but also effectively avoids the welding fixture from impacting or scratching the pin structure and electrode assembly body when inserting and removing the welding fixture compared with the traditional through slot.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, and in particular to a secondary battery pin. Background Technology

[0002] During the manufacturing process of the battery cell assembly, the positive and negative leads and the positive and negative tabs extending from the electrode assembly body need to be welded together. Before welding, welding fixtures need to be inserted between the positive and negative leads and the electrode assembly body for welding support.

[0003] Currently, through slots are opened on the pins to engage with welding fixtures. In existing technologies, the width of the through slots is difficult to control. If the width of the through slots is matched with the welding fixtures, the welding fixtures are not easy to install in the intended position, and there is a risk of impact or scratching the positive and negative pins and the electrode assembly body. If the width of the through slots is too large, the through slots and welding fixtures will not be able to play a locking and fixing role.

[0004] To address this issue, we propose a secondary battery pin design to solve the problem of controlling the width of the through-slot. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology. To achieve the above objective, this utility model adopts the following technical solution:

[0006] A secondary battery pin includes: a pin body, the pin body including a terminal connection portion and a tab connection portion, the terminal connection portion being used to connect to a battery terminal, the tab connection portion being used to connect to a battery tab, the terminal connection portion and the tab connection portion being connected by a connecting portion, the tab connection portion being composed of a horizontal plate and a vertical plate forming an inverted L-shaped structure, and forming an adjustment space below the horizontal plate and on one side of the vertical plate; an adjustment plate, the adjustment plate being installed in the adjustment space, the upper end of the adjustment plate being slidably connected to the lower end of the horizontal plate; and bolts for connecting the pin body and the adjustment plate.

[0007] More preferably, the bottom wall of the horizontal plate located above the adjustment space is provided with an inverted convex groove, and the side wall of the horizontal plate located above the adjustment space is provided with a threaded hole. The threaded hole is inclined and penetrates the bottom wall of the horizontal plate, and the threaded hole is inclined from the side wall of the horizontal plate to the inverted convex groove and penetrates the bottom wall of the horizontal plate.

[0008] More preferably, the upper end of the adjustment plate is provided with an inverted convex block that mates with the inverted convex groove.

[0009] More preferably, the thickness of the adjusting plate is the same as the thickness of the electrode connecting part, and after the adjusting plate is assembled with the horizontal plate, the large surface of the adjusting plate and the large surface of the electrode connecting part are on the same plane.

[0010] More preferably, after the adjusting plate and the horizontal plate are assembled, the outer wall of the adjusting plate and the outer wall of the horizontal plate are on the same plane.

[0011] More preferably, the threaded hole extends obliquely from the side wall of the horizontal plate to the bottom wall of the horizontal plate, with an inclination angle of 30 degrees to 60 degrees with the horizontal line, and a countersunk groove coaxial with the threaded hole is provided on the side wall of the horizontal plate.

[0012] More preferably, the pole connection portion has a pole assembly hole that runs from top to bottom.

[0013] More preferably, the connecting part is arc-shaped, the pole post connecting part is perpendicular to the pole tab connecting part, and the pole post connecting part, the connecting part and the pole tab connecting part are integrally formed.

[0014] More preferably, the pole connection portion adjacent to the connecting portion is a fusible portion, the surface of the fusible portion is provided with a fusible hole, and the side wall of the fusible portion is provided with a fusible groove.

[0015] More preferably, the edges of both the pin body and the adjustment plate are rounded chamfers.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention eliminates the need to consider the compatibility of the through slot. First, the adjustment space of the pin body is placed against the welding fixture. Then, the welding fixture is clamped between the vertical plate and the adjustment plate by sliding the adjustment plate. Finally, it is secured with bolts. This invention adopts an open assembly structure, which not only solves the size problem of the welding fixture fit, but also effectively avoids the welding fixture from impacting or scratching the pin structure and electrode assembly body when inserting or removing the welding fixture compared to the traditional through slot. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the pin body structure;

[0020] Figure 3 This is a schematic diagram of the adjustment plate.

[0021] Figure 4 This is a side view of the present invention;

[0022] Figure 5 This is the front view of the present invention.

[0023] In the figure: pin body 1, adjusting plate 2, bolt, pole connection part 11, connecting part 12, pole lug connection part 13, pole assembly hole 111, fuse groove 112, fuse hole 113, horizontal plate 131, vertical plate 132, adjusting space 133, inverted convex groove 1311, threaded hole 1312, inverted convex block 21, base plate 22. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1-5 A secondary battery pin includes: a pin body 1, the pin body 1 including a terminal connection portion 11 and a tab connection portion 13, the terminal connection portion 11 being used to connect to battery terminals, the tab connection portion 13 being used to connect to battery tabs, the terminal connection portion 11 and the tab connection portion 13 being connected by a connecting portion 12, the tab connection portion 13 being an inverted L-shaped structure composed of a horizontal plate 131 and a vertical plate 132, and forming an adjustment space 133 below the horizontal plate 131 and on one side of the vertical plate 132; an adjustment plate 2, the adjustment plate 2 being installed in the adjustment space 133, the upper end of the adjustment plate 2 being slidably connected to the lower end of the horizontal plate 131; and bolts for connecting the pin body 1 and the adjustment plate 2.

[0026] In this embodiment: The adjusting plate 2 is connected to the inverted groove 1311 by the inverted convex block 21. The adjusting plate 2 can slide back and forth along the inverted groove 1311. Before the welding fixture is introduced, the adjusting plate 2 is first slid outward along the inverted groove 1311 so that the distance between the vertical plate 132 and the adjusting plate 2 is much greater than the thickness of the welding fixture. At this time, this distance is inserted into the welding fixture. At this time, the height from the bottom wall of the horizontal plate 131 to the bottom wall of the vertical plate 132 is less than the height of the welding fixture, that is, the bottom wall of the horizontal plate 131 can be supported on the welding fixture. Then the adjusting plate 2 is slid inward along the inverted groove 1311 so that the adjusting plate 2 clamps the welding fixture between the vertical plate 132 and the adjusting plate 2. Then the adjusting plate 2 is fixed by bolts to prevent the adjusting plate 2 from sliding outward.

[0027] An inverted convex groove 1311 is provided on the bottom wall of the horizontal plate 131 located above the adjustment space 133, and a threaded hole 1312 is provided on the side wall of the horizontal plate 131 located above the adjustment space 133. The threaded hole 1312 is inclined and penetrates the bottom wall of the horizontal plate 131. An inverted convex block 21 that mates with the inverted convex groove 1311 is provided at the upper end of the adjustment plate 2.

[0028] In the embodiment, the adjusting plate 2 and the horizontal plate 131 slide through the cooperation of the inverted groove 1311 and the inverted block 21. However, this application is not limited to these structures, and any structure that can cooperate to slide is acceptable.

[0029] The thickness of the adjusting plate 2 is the same as the thickness of the tab connecting part 13. After the adjusting plate 2 is assembled with the horizontal plate 131, the large surface of the adjusting plate 2 and the large surface of the tab connecting part 13 are on the same plane.

[0030] In the embodiment: after the adjustment plate 2 is assembled with the horizontal plate 131, the front and back of the adjustment plate 2 and the electrode connection part 13 are flush, which facilitates the installation of the pins and the battery.

[0031] After the adjusting plate is assembled with the horizontal plate, the outer wall of the adjusting plate and the outer wall of the horizontal plate are on the same plane.

[0032] In this embodiment: after the adjustment plate 2 is assembled with the horizontal plate 131, the outer wall of the adjustment plate is flush with the outer wall of the horizontal plate, which facilitates the installation of the pins and the battery.

[0033] The threaded hole 1312 is obliquely penetrated through the side wall of the horizontal plate 131 and extends into the bottom wall of the horizontal plate 131, with an inclination angle of 30 degrees to 60 degrees with the horizontal line. A countersunk groove coaxial with the threaded hole 1312 is provided on the side wall of the horizontal plate 131.

[0034] In the embodiment: the inclination angle of the threaded hole 1312 can be any angle between 30 degrees and 60 degrees, such as 30 degrees, 45 degrees, 60 degrees, etc. When the bolt (not shown in the figure) is screwed into the threaded hole 1312, the tail end of the bolt is pressed against the adjusting plate 2. The inclined bolt has a forward and downward pressing force, which effectively prevents the adjusting plate 2 from sliding outward. At this time, the bolt head is just hidden in the countersunk groove, which effectively avoids the bolt head protruding and effectively prevents the problem of scratching or collision caused by the bolt head protruding.

[0035] The pole connection part 11 has a pole assembly hole 111 that runs from top to bottom.

[0036] In the embodiment: the electrode is connected to the electrode through the electrode assembly hole 111.

[0037] The connecting part 12 is arc-shaped, and the pole post connecting part 11 is perpendicular to the pole tab connecting part 13.

[0038] In the embodiment: the connecting part 12 is a quarter arc, one end of which is connected to the pole post connecting part 11 and the other end is connected to the pole tab connecting part 13. The pole post connecting part 11, the connecting part 12 and the pole tab connecting part 13 are integrally formed, that is, the pin body 1 is an integrally formed structure.

[0039] The pole connection 11 is adjacent to the connecting part 12 as a fusible part, and a fusible hole 113 is provided on the surface of the fusible part, and a fusible groove 112 is provided on the side wall of the fusible part.

[0040] In the embodiment: the fuse hole 113 is a blind hole or a through hole. The volume of the fuse part is reduced by the fuse hole 113, so that when the current flowing through the pin is equal to or greater than a preset threshold, the pin can be broken by heat, thereby protecting the battery from damage.

[0041] In the embodiment, there can be one or two fusing grooves 112, which are distributed on both sides of the fusing part. The fusing grooves 112 on both sides can be symmetrically distributed or asymmetrically distributed. The fusing grooves 112 can not only reduce the volume of the fusing part, but also play a role in limiting and positioning during the processing and manufacturing process.

[0042] Both the pin body 1 and the adjustment plate 2 have rounded chamfered edges.

[0043] In the embodiment: all edges are rounded. The rounded corners effectively prevent impacts or scratches, and also effectively prevent right-angled edges from scratching or cutting the tabs.

[0044] This invention eliminates the need to consider the compatibility of the through slot. First, the adjustment space of the pin body is placed against the welding fixture. Then, the welding fixture is clamped between the vertical plate and the adjustment plate by sliding the adjustment plate. Finally, it is secured with bolts. This invention adopts an open assembly structure, which not only solves the size problem of the welding fixture fit, but also effectively avoids the welding fixture from impacting or scratching the pin structure and electrode assembly body when inserting or removing the welding fixture compared to the traditional through slot.

Claims

1. A secondary battery lead characterized by, include: The pin body includes a terminal connection part and a tab connection part. The terminal connection part is used to connect the battery terminal, and the tab connection part is used to connect the battery tab. The terminal connection part and the tab connection part are connected by a connecting part. The tab connection part is composed of a horizontal plate and a vertical plate forming an inverted L-shaped structure, and an adjustment space is formed below the horizontal plate and on one side of the vertical plate. An adjusting plate is installed in the adjusting space, and the upper end of the adjusting plate is slidably connected to the lower end of the horizontal plate. Bolts are used to connect the pin body and the adjustment plate.

2. The secondary battery pin of claim 1, wherein An inverted groove is provided on the bottom wall of the horizontal plate located above the adjustment space, and a threaded hole is provided on the side wall of the horizontal plate located above the adjustment space. The threaded hole is inclined and penetrates the bottom wall of the horizontal plate.

3. The secondary battery pin of claim 2, wherein The upper end of the adjustment plate is provided with an inverted convex block that mates with the inverted convex groove.

4. The secondary battery pin of claim 1, wherein The thickness of the adjusting plate is the same as the thickness of the electrode connecting part. After the adjusting plate is assembled with the horizontal plate, the large surface of the adjusting plate and the large surface of the electrode connecting part are on the same plane.

5. The secondary battery pin of claim 2, wherein The threaded hole is inclined through the side wall of the horizontal plate and extends into the bottom wall of the horizontal plate at an angle of 30-60 degrees with the horizontal line. A countersunk groove coaxial with the threaded hole is provided on the side wall of the horizontal plate.

6. The secondary battery pin of claim 1, wherein The pole connection part has a pole assembly hole that runs from top to bottom.

7. The secondary battery pin of claim 1, wherein The connecting part is arc-shaped, and the pole post connecting part is perpendicular to the pole ear connecting part.

8. The secondary battery pin of claim 7, wherein, The pole connection portion adjacent to the connecting portion is a fusible part, the surface of the fusible part is provided with a fusible hole, and the side wall of the fusible part is provided with a fusible groove.

9. The secondary battery pin of claim 1, wherein, Both the pin body and the adjustment plate have rounded chamfered edges.

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