Connecting piece, battery protection plate and battery

Abstract

The utility model discloses a connecting piece, a battery protection plate and a battery, the connecting piece comprises a first connecting sheet and a second connecting sheet, and the second connecting sheet is vertically connected to the first connecting sheet; in the preset direction, the length of the second connecting piece is larger than that of the first connecting piece. When the protective plate is applied, the first connecting piece is welded on the protective plate main body through a patch technology, the second connecting piece is connected with the tabs, and the length of the second connecting piece is greater than that of the first connecting piece, so that the welding area of the second connecting piece and the tabs is increased, even if the positions of the tabs of the positive / negative electrode deviate due to process defects, the tabs of the positive / negative electrode cannot be damaged. And the second connecting sheet can still be ensured to have enough welding area to be welded with the tab, so that the welding reliability is prevented from being influenced, and the safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a connecting piece, a battery protection board and a battery. Background Art

[0002] A soft-pack battery consists of a battery cell and a protection board. The battery cell is responsible for storing and releasing electric energy, while the protection board ensures the safety and stability of the battery and prevents overcharging, over-discharging, over-current and other situations. During the manufacturing process, the positive and negative electrode tabs of the battery cell are usually connected to the nickel sheets on the protection board by welding to achieve the transfer of electrons. However, when the positions of the positive / negative electrode tabs of the battery cell deviate due to process defects, the margins between the positive and negative electrodes and the reference edge of the battery cell change, making it difficult to ensure sufficient welding area between the nickel sheet and the electrode tab, affecting the welding reliability between the electrode tab and the nickel sheet, and further affecting the safety of the battery. Summary of the Utility Model

[0003] Embodiments of the utility model provide a battery protection board and a battery to solve the problem that when the positions of the positive / negative electrode tabs deviate, the welding reliability between the electrode tab and the nickel sheet is affected due to insufficient welding area of the nickel sheet, and achieve the effect of improving the safety of the battery.

[0004] Specifically, the utility model provides a connecting piece, which includes a first connecting piece and a second connecting piece. The second connecting piece is vertically connected to the first connecting piece; in a preset direction, the length of the second connecting piece is greater than the length of the first connecting piece.

[0005] Optionally, the ratio of the length of the first connecting piece to the length of the second connecting piece is 1:1.1 - 2.

[0006] Optionally, the first connecting piece and the second connecting piece are integrally bent and formed.

[0007] Optionally, the projection of the second connecting piece on the first connecting piece extends beyond the side edges on both sides of the first connecting piece;

[0008] Or, one side of the second connecting piece is in the same plane as one side of the first connecting piece, and the other side of the second connecting piece is spaced from the other side of the first connecting piece.

[0009] Optionally, the connecting piece further includes a notch, and the notch is arranged at the connection position of the first connecting piece and the second connecting piece.

[0010] Optionally, both the first connecting piece and the second connecting piece are nickel sheets.

[0011] The present utility model further provides a battery protection board, which includes a protection board main body and a connecting member as described in any one of the above, and the connecting member is disposed on the protection board main body; the first connecting piece is connected to the protection board main body.

[0012] Optionally, the battery protection board further includes a conventional solder tab, the conventional solder tab is disposed on the protection board main body, and is spaced from the connecting member in the length direction of the protection board main body;

[0013] Alternatively, the number of the connecting members is two, and the two connecting members are spaced from each other in the length direction of the protection board main body.

[0014] Optionally, through holes are provided on the protection board main body;

[0015] At least part of the through holes are located between the conventional solder tab and the connecting member; or at least part of the through holes are located between the two connecting members.

[0016] The present utility model further provides a battery, which includes a battery cell and a battery protection board as described in any one of the above, and the tab of the battery cell is connected to the second connecting piece.

[0017] The beneficial effects of the present utility model are as follows:

[0018] When the connecting member, the battery protection board and the battery provided by the present utility model are applied, the first connecting piece is welded to the protection board main body by a chip technology, and the second connecting piece is connected to the tab. Since the length of the second connecting piece is greater than that of the first connecting piece, the welding area between the second connecting piece and the tab can be increased. Even if the positions of the tabs of the positive / negative electrodes deviate due to process defects, it can still be ensured that the second connecting piece has sufficient welding area to be welded to the tab, avoiding affecting the welding reliability, thereby improving the safety of the battery. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of a connecting member in an embodiment of the present utility model;

[0021] Figure 2 is a schematic partial structural diagram of a battery in an embodiment of the present utility model;

[0022] Figure 3It is a schematic structural diagram of a battery protection board in an embodiment of the present utility model;

[0023] Figure 4 It is a schematic structural diagram of a battery in an embodiment of the present utility model.

[0024] In the figure: 100, the main body of the protection board; 110, via holes; 200, connecting members; 210, the first connecting piece; 220, the second connecting piece; 230, notches; 300, battery cells; 310, tabs. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Figure 1 It is a schematic structural diagram of a connecting member in an embodiment of the present utility model, as Figure 1 shown, and with reference to Figures 2 to 4, an embodiment of the present utility model provides a connecting member 200, which includes a first connecting piece 210 and a second connecting piece 220. The second connecting piece 220 is vertically connected to the first connecting piece 210; in a preset direction, the length of the second connecting piece 220 is greater than the length of the first connecting piece 210. Wherein, the preset direction is parallel to the first connecting piece 210 and parallel to the second connecting piece 220.

[0029] When the embodiment of the present utility model is applied, the first connecting piece 210 is welded to the protection plate main body 100 by a chip technology, and the second connecting piece 220 is connected to the pole ear 310. Since the length of the second connecting piece 220 is greater than the length of the first connecting piece 210, the welding area where the second connecting piece 220 can be welded to the pole ear 310 is increased. Even if the positions of the positive / negative pole ears 310 deviate due to process defects, it can still ensure that the second connecting piece 220 has enough welding area to be welded to the pole ear 310, avoiding affecting the welding reliability, thereby improving the safety of the battery.

[0030] In an embodiment of the present utility model, the ratio of the length of the first connecting piece 210 to the length of the second connecting piece 220 is 1:1.1 to 2. If the ratio is too small, the length difference between the second connecting piece 220 and the first connecting piece 210 is too small, resulting in a small increase in the welding area of the second connecting piece 220. Once the position of the pole ear 310 changes greatly, the welding quality cannot be ensured. If the ratio is too large, the second connecting piece 220 is too long, which is not conducive to the layout and wiring of the internal circuit of the battery.

[0031] In an embodiment of the present utility model, the first connecting piece 210 and the second connecting piece 220 are integrally bent and formed, and there is no connection through any additional connecting structure, avoiding use failures caused by connection loosening. Further, both the first connecting piece 210 and the second connecting piece are nickel sheets; that is to say, the connecting member 200 is integrally bent and formed by nickel sheets. The reason for using nickel sheets is that nickel sheets have good electrical conductivity, corrosion resistance, oxidation resistance and other advantages.

[0032] In an embodiment of the present utility model, the connecting member 200 further includes a notch 230, and the notch 230 is provided at the connection position of the first connecting piece 210 and the second connecting piece 220. With this setting, the internal stress when the connecting member 200 is bent can be reduced. On the one hand, it can avoid the connecting member 200 from being torn due to excessive stress during bending, and on the other hand, it enables the connecting member 200 to be bent into a preset structure / shape.

[0033] In an embodiment of the present utility model, the projection of the second connecting piece 220 in the direction of the first connecting piece 210 extends beyond the side edges on both sides of the first connecting piece 210; alternatively, one side of the second connecting piece 220 is in the same plane as one side of the first connecting piece 210, and the other side of the second connecting piece 220 is spaced from the other side of the first connecting piece 210. This embodiment provides two structures of the connecting piece 200 to meet the requirements of different batteries.

[0034] As Figure 2 shown, the present utility model further provides a battery protection board, which includes a protection board main body 100 and the connecting piece 200 in any one of the above embodiments, so as to have all the effects of the connecting piece. The connecting piece 200 is arranged on the protection board main body 100; the first connecting piece 210 is connected to the protection board main body 100.

[0035] In an embodiment of the present utility model, the battery protection board further includes a conventional welding piece, which is arranged on the protection board main body 100 and is spaced from the connecting piece 200 in the length direction of the protection board main body 100. The conventional welding piece is a connecting piece in the prior art where the length of the second connecting piece 220 is the same as the length of the first connecting piece 210. With this arrangement, while aligning the tab 310 with the conventional welding piece / connecting piece 200, the existing conventional welding piece can be fully utilized to reduce costs.

[0036] In an alternative embodiment of the present utility model, the number of the connecting pieces 200 is two, and the two connecting pieces 200 are spaced from each other in the length direction of the protection board main body 100. With this arrangement, the welding area of the second connecting piece 220 can be maximized to accommodate a larger deviation in the position of the tab 310 and improve the error tolerance.

[0037] As Figure 3 shown, in an embodiment of the present utility model, through holes 110 are provided on the protection board main body 100. At least part of the through holes 110 are located between the conventional welding piece and the connecting piece 200; or at least part of the through holes 110 are located between the two connecting pieces 200. Since the through holes 110 have been provided on the protection board main body 100 during the preparation of the protection board main body 100, in order to avoid interfering with the through holes 110, the positions of the connecting piece 200 or the conventional welding piece cannot be changed. Therefore, the tab 310 cannot be aligned with the conventional welding piece / connecting piece 200 by adjusting the positions of the connecting piece 200 or the conventional welding piece.

[0038] As Figure 4As shown, the present utility model further provides a battery, which includes a battery cell 300 and a battery protection board as described in any of the above embodiments, so as to have all the effects of the battery protection board. The tab 310 of the battery cell 300 is connected to the second connecting piece 220.

[0039] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model, and should all be included in the protection scope of the present utility model.

Claims

1. A connector, characterized in that: It comprises a first connecting piece (210) and a second connecting piece (220), wherein the second connecting piece (220) is vertically connected to the first connecting piece (210); in a preset direction, the length of the second connecting piece (220) is greater than the length of the first connecting piece (210).

2. The connecting piece according to claim 1, characterized in that: The ratio of the length of the first connecting piece (210) to the length of the second connecting piece (220) is 1:1.1-2.

3. The connecting piece according to claim 1, characterized in that: The first connecting piece (210) and the second connecting piece (220) are integrally bent and formed.

4. The connector according to claim 1, characterized in that: The projection of the second connecting piece (220) on the first connecting piece (210) extends beyond the side edges of both sides of the first connecting piece (210); Alternatively, one side of the second connecting sheet (220) is in the same plane as one side of the first connecting sheet (210), and the other side of the second connecting sheet (220) is spaced apart from the other side of the first connecting sheet (210).

5. The connector according to claim 1, characterized in that: The connecting member (200) further comprises a notch (230), wherein the notch (230) is arranged at a connection position between the first connecting piece (210) and the second connecting piece (220).

6. The connector according to claim 1, characterized in that: The first connecting sheet (210) and the second connecting sheet are both nickel sheets.

7. A battery protection board, characterized in that: It comprises a protection plate body (100) and a connecting piece (200) as claimed in any one of claims 1 to 6, wherein the connecting piece (200) is arranged on the protection plate body (100); and the first connecting piece (210) is connected to the protection plate body (100).

8. The battery protection board according to claim 7, characterized in that: The battery protection board further comprises a conventional welding sheet, which is arranged on the protection board body (100) and is spaced apart from the connecting piece (200) in the length direction of the protection board body (100); Alternatively, the number of the connecting members (200) is two, and the two connecting members (200) are arranged at intervals in the length direction of the protection plate body (100).

9. The battery protection board according to claim 8, characterized in that: The protection plate body (100) is provided with a via (110); At least part of the via hole (110) is located between the conventional soldering piece and the connecting piece (200); or, at least part of the via hole (110) is located between two connecting pieces (200).

10. A battery, characterized in that: It comprises a battery cell (300) and a battery protection plate as claimed in any one of claims 7 to 9, wherein a tab (310) of the battery cell (300) is connected to the second connecting sheet (220).

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