Battery connecting piece and lithium battery

Abstract

The utility model provides a battery connecting piece and a lithium battery. The battery connecting piece comprises a connecting piece body and a plurality of elastic connecting pieces, the connecting piece body is provided with a plurality of battery cell connecting holes, each battery cell connecting hole is used for corresponding to at least one battery cell, each battery cell connecting hole is internally provided with one elastic connecting piece, and the elastic connecting pieces are arranged on the connecting piece body. The elastic connecting piece comprises a first elastic pin and a second elastic pin, the first elastic pin and the second elastic pin are both connected with the connecting piece body, and the first elastic pin and the second elastic pin are respectively bent towards one battery cell and are electrically connected with an electrode of the corresponding battery cell. The welding-free effect is achieved through the first elastic pins and the second elastic pins, mechanical electric connection is achieved through the elastic pins, and the electric connection effect is stable.

Description

Technical Field

[0001] The present disclosure relates to the field of battery connection tabs, and particularly to a battery connection tab and a lithium battery. Background Art

[0002] A battery connection tab is a device for transmitting current and is a key component for connecting battery cells. It has various shapes, including circular, rectangular, trapezoidal, triangular, and stepped shapes, etc., and plays a crucial role in a battery pack. In traditional technologies, the battery connection tab is fixed to the battery cell by means of resistance welding or projection welding to form an electrical connection. However, since the battery connection tab and the battery cell are not detachable after welding, there are problems such as non-recyclability and difficult maintenance.

[0003] Therefore, it is necessary to make the connection tab into a structure that is free of welding, and to ensure stable electrical connection of the connection tab, so as to facilitate battery disassembly and maintenance, and is conducive to the cascade utilization of the battery pack. Utility Model Content

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a battery connection tab and a lithium battery that are free of welding and have stable electrical connection effects.

[0005] The purpose of the present disclosure is achieved through the following technical solutions:

[0006] A battery connection tab includes:

[0007] A connection tab body and a plurality of elastic connectors. The connection tab body is provided with a plurality of battery cell connection holes, each of the battery cell connection holes is used to correspond to at least one battery cell, and one of the elastic connectors is disposed in each of the battery cell connection holes. The elastic connector includes a first elastic pin and a second elastic pin. Both the first elastic pin and the second elastic pin are connected to the connection tab body. The first elastic pin and the second elastic pin are respectively bent towards one of the battery cells and are electrically connected to the electrodes of the corresponding battery cells.

[0008] In one embodiment, the first elastic pin and the second elastic pin are bent in the same direction.

[0009] In one embodiment, the first elastic pin and the second elastic pin are bent towards each other.

[0010] In one embodiment, the number of the first elastic pins and the second elastic pins is multiple, and the multiple first elastic pins and the multiple second elastic pins are evenly distributed in the battery cell connection holes.

[0011] In one embodiment, one of the second elastic pins is disposed between any two adjacent first elastic pins.

[0012] In one embodiment, the first elastic pin includes an elastic connecting portion and an elastic bending portion. One end of the elastic connecting portion is fixedly connected to the connecting piece body, the other end of the elastic connecting portion is fixedly connected to the elastic bending portion, and the connection between the elastic connecting portion and the elastic bending portion is bent toward the corresponding battery cell.

[0013] In one embodiment, an arc angle is formed between the elastic connecting portion and the elastic bending portion.

[0014] In one embodiment, the height by which the elastic connecting portion protrudes from the connecting piece body is 1.4 mm to 2.1 mm.

[0015] In one embodiment, the thickness of the first elastic pin is 0.2 mm.

[0016] A lithium battery includes at least one battery module and the battery connecting piece according to any one of the above embodiments, and the battery connecting piece is connected to at least one of the battery modules.

[0017] Compared with the prior art, the present disclosure has at least the following advantages:

[0018] For the above-mentioned battery connecting piece, a plurality of battery cell connecting holes are provided in the connecting piece body, and an elastic connecting member is disposed in each battery cell connecting hole. The elastic connecting member includes a first elastic pin and a second elastic pin, and the first elastic pin and the second elastic pin are respectively bent toward the battery cell. That is, when the connecting piece body is installed at the end of the battery module, the bending directions of the first elastic pin and the second elastic pin are the same, so that the battery module is electrically connected through the first elastic pin and the second elastic pin. When the connecting piece body is installed between two battery modules, the bending directions of the first elastic pin and the second elastic pin are opposite, so that one battery module is electrically connected to the first elastic pin and the other battery module is electrically connected to the second elastic pin. In this way, the effect of avoiding welding is achieved, and mechanical electrical connection is realized through the elastic pins, so that the electrical connection effect is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of a battery connecting piece according to an embodiment;

[0021] Figure 2 ForFigure 1 Another schematic structural view of the battery connecting piece shown;

[0022] Figure 3 is Figure 1 Another schematic structural view of the battery connecting piece shown;

[0023] Figure 4 is Figure 1 Schematic structural view of the assembly of the battery connecting piece and the battery module shown. Specific embodiments

[0024] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present disclosure can be understood more thoroughly and comprehensively.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] The present disclosure provides a battery connecting piece, including a connecting piece body and a plurality of elastic connecting members. A plurality of battery cell connecting holes are formed in the connecting piece body, and each of the battery cell connecting holes is used to correspond to at least one battery cell. An elastic connecting member is arranged in each of the battery cell connecting holes. The elastic connecting member includes a first elastic pin and a second elastic pin. Both the first elastic pin and the second elastic pin are connected to the connecting piece body. The first elastic pin and the second elastic pin are respectively bent towards a battery cell and are electrically connected to the electrodes of the corresponding battery cell.

[0028] The above-mentioned battery connecting piece has a plurality of battery cell connecting holes formed in the connecting piece body, and an elastic connecting piece is disposed in each battery cell connecting hole. The elastic connecting piece includes a first elastic pin and a second elastic pin. The first elastic pin and the second elastic pin are respectively bent towards the battery cell. That is, when the connecting piece body is installed at the end of the battery module, the bending directions of the first elastic pin and the second elastic pin are the same, so that the battery module is electrically connected through the first elastic pin and the second elastic pin. When the connecting piece body is installed between two battery modules, the bending directions of the first elastic pin and the second elastic pin are opposite, so that one battery module is electrically connected to the first elastic pin and the other battery module is electrically connected to the second elastic pin. In this way, the effect of avoiding welding is achieved, and mechanical electrical connection is realized through the elastic pins, so that the electrical connection effect is stable.

[0029] To better understand the technical solutions and beneficial effects of the present disclosure, the following further describes the present disclosure in detail with specific embodiments:

[0030] As Figures 1 to 3 shown, a battery connecting piece 10a in an embodiment includes a connecting piece body 100 and a plurality of elastic connecting pieces 200. The connecting piece body 100 is provided with a plurality of battery cell connecting holes 110. Each battery cell connecting hole 110 is used to correspond to at least one battery cell, that is, the battery cell connecting hole 110 can also correspond to two battery cells. An elastic connecting piece 200 is disposed in each battery cell connecting hole 110. The elastic connecting piece 200 includes a first elastic pin 210 and a second elastic pin 210. The first elastic pin 210 and the second elastic pin 210 are both connected to the connecting piece body 100. The first elastic pin 210 and the second elastic pin 210 are respectively bent towards a battery cell and electrically connected to the electrodes of the corresponding battery cell.

[0031] In this embodiment, a plurality of battery cell connecting holes 110 correspond to a plurality of battery cells on the battery module 10b. The first elastic pin 210 and the second elastic pin 210 in each battery cell connecting hole 110 are used to electrically connect to the corresponding battery cell. Specifically, the battery connecting piece 10a can be installed at the end of the battery module 10b or between two battery modules 10b. When the connecting piece body 100 is installed at the end of the battery module 10b, the bending directions of the first elastic pin 210 and the second elastic pin 210 are the same, so that both the first elastic pin 210 group and the second elastic pin 210 group are electrically connected to the battery module 10b. When the connecting piece body 100 is installed between two battery modules 10b, the bending directions of the first elastic pin 210 and the second elastic pin 210 are opposite, so that the first elastic pin 210 group is electrically connected to one battery module 10b and the second elastic pin 210 group is electrically connected to the other battery module 10b.

[0032] The above-mentioned battery connecting piece 10a has a plurality of battery cell connecting holes 110 formed in the connecting piece body 100. An elastic connecting piece 200 is arranged in each battery cell connecting hole 110. The elastic connecting piece 200 includes a first elastic pin 210 and a second elastic pin 220. The first elastic pin 210 and the second elastic pin 220 are bent towards the battery cell respectively. That is, when the connecting piece body 100 is installed at the end of the battery module 10b, the bending directions of the first elastic pin 210 and the second elastic pin 220 are the same, so that the battery module 10b is electrically connected through the first elastic pin 210 and the second elastic pin 220. When the connecting piece body 100 is installed between two battery modules 10b, the bending directions of the first elastic pin 210 and the second elastic pin 220 are opposite, so that one battery module 10b is electrically connected to the first elastic pin 210, and the other battery module 10b is electrically connected to the second elastic pin 220. In this way, the effect of avoiding welding is achieved, and the mechanical electrical connection is realized through the elastic pins, making the electrical connection effect stable.

[0033] As Figure 3 shown, in one embodiment, the first elastic pin 210 and the second elastic pin 210 are bent in the same direction. In this embodiment, the connecting piece body 100 is installed at the end of the battery module 10b, and the other end of the connecting piece body 100 is fixed to the bracket. Therefore, both the first elastic pin 210 and the second elastic pin 210 are bent towards the battery cells of the battery module 10b, that is, the first elastic pin 210 and the second elastic pin 210 are bent upward or downward, and the bending directions are the same.

[0034] As Figure 1 and Figure 2 shown, in one embodiment, the first elastic pin 210 and the second elastic pin 210 are bent towards each other. In this embodiment, the connecting piece body 100 is installed between two battery modules 10b. At this time, the first elastic pin 210 is bent upward to be electrically connected to one battery module 10b, and the second elastic pin 210 is bent downward to be electrically connected to the other battery module 10b. The adjacent two battery modules 10b are conducted through the first elastic pin 210 and the second elastic pin 210.

[0035] As Figures 1 to 3 shown, in one embodiment, the number of the first elastic pins 210 and the second elastic pins 210 is multiple, and the multiple first elastic pins 210 and the multiple second elastic pins 210 are evenly distributed in the battery cell connecting hole 110. In this embodiment, the number of the first elastic pins 210 is 3, the number of the second elastic pins 210 is 3, and the first elastic pins 210 and the second elastic pins 210 are arranged at circular intervals in the battery cell connecting hole 110.

[0036] As Figure 1 and Figure 2 shown, in one embodiment, a second elastic pin 210 is provided between any two adjacent first elastic pins 210. In this embodiment, the number of first elastic pins 210 is 3, and the number of second elastic pins 210 is 3. A second elastic pin 210 is provided between every two adjacent first elastic pins 210, and the first elastic pins 210 and the second elastic pins 210 are arranged at circular intervals in the battery cell connection hole 110. When the connection piece body 100 is installed between two battery modules 10b, the first elastic pins 210 bend upward to be electrically connected to one of the battery modules 10b, and the second elastic pins 210 bend downward to be electrically connected to the other battery module 10b, so that the first elastic pins 210 and the second elastic pins 210 are bent towards each other.

[0037] As Figure 2 shown, in one embodiment, the first elastic pin 210 includes an elastic connection portion 211 and an elastic bending portion 212. One end of the elastic connection portion 211 is fixedly connected to the connection piece body 100, and the other end of the elastic connection portion 211 is fixedly connected to the elastic bending portion 212. The connection between the elastic connection portion 211 and the elastic bending portion 212 bends towards the corresponding battery cell. In this embodiment, the connection between the elastic connection portion 211 and the elastic bending portion 212 bends towards the corresponding battery cell, that is, bends upward or downward, so that the connection between the elastic connection portion 211 and the elastic bending portion 212 is electrically connected to the battery cell.

[0038] As Figure 2 shown, in one embodiment, an arc angle 211a is formed between the elastic connection portion 211 and the elastic bending portion 212. It can be understood that an arc angle 211a is formed between the connection of the elastic connection portion 211 and the elastic bending portion 212, and the arc angle 211a is electrically connected to the electrode of the battery cell. The arc-shaped design of the arc angle 211a is beneficial to enhancing the connection stability with the battery cell.

[0039] In one embodiment, the height by which the elastic connection portion 211 protrudes from the connection piece body 100 is 1.4 mm to 2.1 mm. In this embodiment, the height by which the elastic connection portion 211 protrudes from the connection piece body 100 is 2.0 mm, that is, the elastic connection portion 211 can protrude upward or downward so that the elastic bending portion 212 is electrically connected to the electrode of the battery cell.

[0040] In one embodiment, the thickness of the first elastic pin 210 is 0.2 mm. In this embodiment, the first elastic pin 210 is made of beryllium copper and has a thickness of 0.2 mm to provide better elastic effect for the first elastic pin 210. Further, the second elastic pin 210 is also made of beryllium copper and has the same thickness as the first elastic pin 210 to provide better elastic effect for the second elastic pin 210.

[0041] As Figure 2 shown, in one embodiment, the battery connecting piece 10a further includes a buckle 300. The buckle 300 is fixedly connected to the outer periphery of the connecting piece body 100, and the buckle 300 is used for clamping with the bracket. It can be understood that after the connecting piece body 100 is fixed with a fixing rod, the buckle 300 is clamped in the slot of the bracket to further fix the connecting piece body 100 and the bracket, making the fixing effect better.

[0042] In one embodiment, the buckle 300 and the connecting piece body 100 are of an integrally formed structure. In this embodiment, the buckle 300 and the connecting piece body 100 are integrally formed by stamping to make the connection strength between the buckle 300 and the connecting piece body 100 higher.

[0043] As Figure 4 shown, the present application also provides a lithium battery 10, including a battery module 10b and the battery connecting piece 10a described in any of the above embodiments. The battery module 10b is connected to the battery connecting piece 10a so that the battery cells of the battery module 10b are electrically connected to the battery connecting piece 10a.

[0044] Compared with the prior art, the present disclosure has at least the following advantages:

[0045] For the above-mentioned battery connecting piece 10a, a plurality of battery cell connecting holes 110 are provided in the connecting piece body 100, and an elastic connecting piece 200 is arranged in each battery cell connecting hole 110. The elastic connecting piece 200 includes a first elastic pin 210 and a second elastic pin 220. The first elastic pin 210 and the second elastic pin 220 are respectively bent towards the battery cells. That is, when the connecting piece body 100 is installed at the end of the battery module 10b, the bending directions of the first elastic pin 210 and the second elastic pin 220 are the same, so that the battery module 10b is electrically connected through the first elastic pin 210 and the second elastic pin 220. When the connecting piece body 100 is installed between two battery modules 10b, the bending directions of the first elastic pin 210 and the second elastic pin 220 are opposite, so that one battery module 10b is electrically connected to the first elastic pin 210, and the other battery module 10b is electrically connected to the second elastic pin 220. In this way, the effect of avoiding welding is achieved, and mechanical electrical connection is realized through the elastic pins, making the electrical connection effect stable.

[0046] The above-described embodiments merely represent several implementation manners of the present disclosure. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A battery connecting piece, characterized in that, Comprising: A connecting piece body and a plurality of elastic connecting pieces. The connecting piece body is provided with a plurality of battery cell connecting holes, each of the battery cell connecting holes corresponding to at least one battery cell. One of the elastic connecting pieces is arranged in each of the battery cell connecting holes. The elastic connecting piece includes a first elastic pin and a second elastic pin. Both the first elastic pin and the second elastic pin are connected to the connecting piece body. The first elastic pin and the second elastic pin are respectively bent towards one of the battery cells and are electrically connected to the electrodes of the corresponding battery cells.

2. The battery connection piece according to claim 1, wherein The first elastic pin and the second elastic pin are bent in the same direction.

3. The battery connection piece according to claim 1, characterized in that, The first elastic pin and the second elastic pin are bent towards each other.

4. The battery connection piece according to claim 3, characterized in that, The number of the first elastic pins and the second elastic pins is plural. The plural first elastic pins and the plural second elastic pins are evenly distributed in the battery cell connecting holes.

5. The battery connection piece according to claim 4, characterized in that, One of the second elastic pins is arranged between any two adjacent first elastic pins.

6. The battery connection piece according to claim 1, characterized in that The first elastic pin includes an elastic connecting portion and an elastic bending portion. One end of the elastic connecting portion is fixedly connected to the connecting piece body, and the other end of the elastic connecting portion is fixedly connected to the elastic bending portion. The connection part between the elastic connecting portion and the elastic bending portion is bent towards the corresponding battery cell.

7. The battery connection piece according to claim 6, wherein, An arc angle is formed between the elastic connecting portion and the elastic bending portion.

8. The battery connection piece according to claim 6, wherein The height by which the elastic connecting portion protrudes from the connecting piece body is 1.4 mm to 2.1 mm.

9. The battery connecting piece according to claim 1, wherein The thickness of the first elastic pin is 0.2 mm.

10. A lithium battery, characterized in that, Comprising at least one battery module and the battery connecting piece according to any one of claims 1 to 9. The battery connecting piece is connected to at least one of the battery modules.

Images