Connecting piece

Abstract

The utility model discloses a connecting piece which comprises a pole connecting unit used for being connected with a pole, a tab connecting unit used for being connected with a tab, and a transition connecting unit used for connecting the pole connecting unit and the tab connecting unit, the tab connecting unit is of a bent structure, and the tab connecting unit is attached to the tab. According to the utility model, the problem of inverted insertion of the tab caused by excessive bending of the tab is solved, the bending state of the tab is improved, inverted insertion of the tab is avoided, the battery can be normally used, and the qualified rate of battery production is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a connecting piece. Background Art

[0002] The tab, the battery cell, and the connecting piece are important components of a battery. The battery cell is used to store and release electrical energy. The tab is a metal conductor that leads out the positive and negative electrodes from the battery cell. The connecting piece is usually made of metal and is used to connect the tab and the battery cell to transmit electrical energy from the battery cell to the tab and then from the tab to the external circuit. As the energy density of the battery increases, the bending space of the tab is further compressed. The reduction of the bending space of the tab will cause the surrounding components to squeeze the tab, resulting in an increase in the bending degree of the tab. When the bending reaches a certain degree, the tab may shift from its original position, leading to incorrect connection with the positive and negative electrodes of the battery, that is, the reverse insertion phenomenon occurs. The reverse insertion of the tab is likely to cause a short circuit of the battery cell, and the battery cannot be used normally, thereby reducing the qualified rate of battery production.

[0003] The utility model patent with the application number CN202223222323.1 discloses a connecting piece and a battery. The connecting piece is used to connect the tab arranged on the end face of the battery cell and the top cover assembly. The top cover assembly includes a pole column. The connecting piece is arranged on the end face of the battery cell and includes a pole column connecting portion and a tab mounting portion. The pole column connecting portion is electrically connected to the bottom surface of the pole column. The tab mounting portion is connected to the pole column connecting portion. The tab mounting portion includes an end plate and a sunken boss. The sunken boss is connected to the edge of the end plate. The end plate is connected to the pole column connecting portion. A positioning groove is arranged on the sunken boss, and the tab is bent and placed on the positioning groove after bending. When connecting the tab with this structure, the bending degree between the tab inside the connecting groove and the tab outside the connecting groove is relatively large, and the reverse insertion phenomenon is likely to occur. The reverse insertion of the tab is likely to cause a short circuit of the battery cell, and the battery cannot be used normally, thereby reducing the qualified rate of battery production. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting piece, which solves the problem of reverse insertion of the tab caused by excessive bending, improves the bending state of the tab, avoids the reverse insertion of the tab, enables the battery to be used normally, and improves the qualified rate of battery production.

[0005] The technical solution adopted by the utility model to solve its technical problems is to propose a connecting piece, which includes a pole column connecting unit for connecting with a pole column, a tab connecting unit for connecting with a tab, and a transition connecting unit for connecting the pole column connecting unit and the tab connecting unit; the tab connecting unit is a bent structure and fits with the tab.

[0006] In the embodiment of the present application, there are two tab connecting units, and the two tab connecting units are symmetrically arranged on both sides of the transition connecting unit.

[0007] In an embodiment of the present application, the tab connection unit includes a first folding plate and a second folding plate; one end of the first folding plate is fixedly connected to the transition connection unit, one end of the second folding plate is fixedly connected to the other end of the first folding plate, and the first folding plate and the second folding plate are connected to form a first included angle.

[0008] In an embodiment of the present application, the opening of the first included angle formed by the two tab connection units faces the side where the transition connection unit is located.

[0009] In an embodiment of the present application, the first included angle is a right angle.

[0010] In an embodiment of the present application, the first included angle is an acute angle.

[0011] In an embodiment of the present application, the width of the second folding plate is greater than the width of the first folding plate.

[0012] In an embodiment of the present application, the connection between the first folding plate and the second folding plate is a rounded corner.

[0013] In an embodiment of the present application, the terminal connection unit and the transition connection unit are plate-like structures.

[0014] In an embodiment of the present application, a weight reduction groove is provided on the transition connection unit.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. A connection piece proposed by the present utility model, during the bending process of the tab, the tab connection unit with a bending structure fits with the tab, and the tab connection unit applies a force to the tab, achieving the effect of supporting the tab, so that the tab will not be further bent, thereby limiting the bending degree of the tab, preventing the tab from shifting due to excessive bending, avoiding the reverse insertion of the tab, enabling the battery to be used normally, and improving the qualified rate of battery production;

[0017] 2. A connection piece proposed by the present utility model, the openings of the first included angles formed by the two tab connection units face the same side, making the tabs connected to both sides of the connection piece bend towards the connection piece, facilitating the connection of the tabs;

[0018] 3. A connection piece proposed by the present utility model, the first included angle and the second included angle are preferably acute angles, thereby further limiting the bending degree of the tab attached to the folding plate. Description of the Drawings

[0019] The drawings incorporated in and forming a part of the specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model. In these drawings, like reference numerals are used to denote like elements. The drawings in the following description are some embodiments of the present utility model, not all embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 The first installation schematic diagram of a connecting piece according to an embodiment of the present utility model;

[0021] Figure 2 The first schematic diagram of a connecting piece according to an embodiment of the present utility model;

[0022] Figure 3 The second installation schematic diagram of a connecting piece according to an embodiment of the present utility model;

[0023] Figure 4 The second schematic diagram of a connecting piece according to an embodiment of the present utility model.

[0024] In the figures: 1, pole connection unit; 2, tab connection unit; 21, first folding plate; 22, second folding plate; 23, first included angle; 3, transition connection unit; 31, weight reduction groove; 4, tab. Detailed implementation manners

[0025] To more clearly illustrate the technical solutions in the embodiments of the present utility model and the prior art, the specific implementation manners of the present utility model will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained. In addition, the terms related to directions only represent the relative positional relationships between components, rather than absolute positional relationships.

[0026] An embodiment of the present utility model provides a connecting piece. Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , which mainly includes a pole connection unit 1, a tab connection unit 2, and a transition connection unit 3.

[0027] In an embodiment of the present application, the connecting piece includes a pole connecting unit 1, an ear connecting unit 2, and a transition connecting unit 3. One end of the transition connecting unit 3 is fixedly connected to the pole connecting unit 1, and the other end is fixedly connected to the ear connecting unit 2. The pole connecting unit 1 is used to connect the pole, the ear connecting unit 2 is used to connect the ear, and the transition connecting unit 3 is used to connect the pole connecting unit 1 and the ear connecting unit 2. The ear connecting unit 2 is a bent structure. When the connecting piece connects the ear, the ear connecting unit 2 fits with the ear. In the present application, during the bending process of the ear, the ear connecting unit 2 of the bent structure fits with the ear, and the ear connecting unit 2 applies a force to the ear, achieving the effect of supporting the ear, so that the ear will not be further bent, thereby restricting the bending degree of the ear, preventing the ear from shifting due to excessive bending, avoiding the reverse insertion of the ear, enabling the battery to be used normally, and improving the qualified rate of battery production. Moreover, the ear connecting unit 2 of the bent structure fits with the ear, which can also prevent the connecting piece from cutting the ear.

[0028] Specifically, the pole connecting unit 1 and the transition connecting unit 3 are plate-shaped structures.

[0029] Furthermore, in order to reduce the weight of the connecting piece, a weight reduction groove 31 is provided on the transition connecting unit 3.

[0030] In an implementable manner, there are two ear connecting units 2, and the two ear connecting units 2 are symmetrically arranged on both sides of the transition connecting unit 3, and the ear connecting units 2 on both sides are respectively connected to different ears.

[0031] Specifically, the ear connecting unit 2 includes a first folding plate 21 and a second folding plate 22. One end of the first folding plate 21 is fixedly connected to the transition connecting unit 3, and one end of the second folding plate 22 is fixedly connected to the other end of the first folding plate 21. The first folding plate 21 and the second folding plate 22 are connected to form a first included angle 23, thereby forming the ear connecting unit 2 of the bent structure.

[0032] It should be noted that the opening of the first included angle 23 formed by the two ear connecting units faces the side where the transition connecting unit 3 is located, so that the ears connected on both sides of the connecting piece are bent towards the connecting piece, facilitating the connection of the ears.

[0033] In the first specific embodiment, the first included angle 23 is preferably an acute angle, thereby further restricting the bending degree of the ear fitting on the folding plate, preventing the ear from shifting due to excessive bending, avoiding the reverse insertion of the ear, enabling the battery to be used normally, and improving the qualified rate of battery production.

[0034] In the second specific embodiment, the first included angle 23 is preferably a right angle.

[0035] Furthermore, the width of the second folding plate 22 is greater than the width of the first folding plate 21.

[0036] In order to avoid the tab being scratched, further, the connection between the first folding plate 21 and the second folding plate 22 is provided with a rounded corner.

[0037] In an implementable manner, connection grooves are provided on the first folding plate 21 and the second folding plate 22, and the tab is embedded in the connection groove for welding, so as to fix the tab on the tab connection unit 2.

[0038] Preferably, the depth of the connection groove is greater than the thickness of the tab.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0040] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present utility model are only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A connecting piece, characterized in that, It includes a terminal connection unit (1) for connecting with a terminal post, an ear connection unit (2) for connecting with an ear, and a transition connection unit (3) for connecting the terminal connection unit (1) and the ear connection unit (2); the ear connection unit (2) is of a bent structure, the ear connection unit (2) is in contact with the ear, and the ear connection unit (2) includes a first folding plate (21) and a second folding plate (22); one end of the first folding plate (21) is fixedly connected to the transition connection unit (3), one end of the second folding plate (22) is fixedly connected to the other end of the first folding plate (21), the first folding plate (21) and the second folding plate (22) are connected to form a first included angle (23), and a weight reduction groove (31) is provided on the transition connection unit (3).

2. The connecting piece according to claim 1, wherein, There are two ear connection units (2), and the two ear connection units (2) are symmetrically arranged on both sides of the transition connection unit (3).

3. The connecting piece according to claim 2, characterized in that, The opening of the first included angle (23) formed by the two ear connection units (2) faces the side where the transition connection unit (3) is located.

4. A connecting piece according to claim 3, characterized in that, The first included angle (23) is a right angle.

5. The connecting piece according to claim 3, characterized in that, The first included angle (23) is an acute angle.

6. A connecting piece according to claim 1, characterized in that, The width of the second folding plate (22) is greater than the width of the first folding plate (21).

7. A connecting piece according to claim 1, characterized in that, The connection part of the first folding plate (21) and the second folding plate (22) is a rounded corner.

8. A connecting piece according to claim 1, characterized in that, The terminal connection unit (1) and the transition connection unit (3) are of plate-like structures.

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