Multifunctional nickel sheet and energy storage battery

Abstract

The utility model provides a multifunctional nickel sheet and an energy storage battery, the multifunctional nickel sheet comprises a battery cell connecting sheet, a bending sheet and a welding sheet, the bending sheet and the battery cell connecting sheet are bent, the other end of the bending sheet is connected to the welding sheet, the bending sheet and the welding sheet are bent, the battery cell connecting sheet is used for being connected with a battery module, and the battery module is connected with the battery module. The welding surface of the welding piece is convexly provided with a salient point for performing salient point welding with the control panel, and the edge of one end, far away from the bending piece, of the welding piece is provided with a welding notch for performing tin soldering with the control panel. The salient points and the control board are fixed through salient point welding, the welding points of the welding piece and the control board are increased, the gap between the welding piece and the control board is increased, liquid soldering tin can permeate into the position between the welding piece and the control board more easily, tin soldering is conducted through the welding notch, the welding position is prolonged, the welding area between the welding piece and the welding board is increased, and the welding efficiency is improved. The welding strength of welding between the welding piece and the welding plate is further improved, and the risks of insufficient welding and unsoldering between the welding piece and the welding plate are reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of energy storage power supply, and particularly relates to a multifunctional nickel sheet and an energy storage battery. BACKGROUND

[0002] The energy storage battery is a device capable of storing and releasing electric energy when needed, and is widely used in various fields. In the energy storage battery, the connection end of the total positive electrode and the total negative electrode of the battery module is connected with the nickel sheet, and then the nickel sheet is welded to the BMS control board to achieve the function of electrical connection.

[0003] The welding surface of the nickel sheet is flat, and the welding surface of the copper sheet on the BMS control board is also flat. Due to the small overall area of the BMS control board and a large number of components, the welding surface of the nickel sheet and the control board is very narrow and small, so that the welding surface of the nickel sheet and the welding surface of the control board are not easy to be tinned and welded, and the middle position of the nickel sheet cannot be tinned, so that only the edge of the nickel sheet is tinned, which is easy to cause virtual welding and disconnection between the nickel sheet and the control board, thereby causing the local temperature of the nickel sheet to rise during the charging or discharging process of the battery module, and there is a safety risk. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art, and to provide a multifunctional nickel sheet and an energy storage battery with higher welding strength and reduced virtual welding and disconnection.

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

[0006] A multifunctional nickel sheet, comprising an electric core connecting sheet, a bending sheet and a welding sheet, one end of the bending sheet is connected to the electric core connecting sheet, the bending sheet is bent between the electric core connecting sheet to make the bending sheet and the electric core connecting sheet inclined, the other end of the bending sheet is connected to the welding sheet, the bending sheet is bent between the welding sheet to make the bending sheet and the welding sheet inclined, the electric core connecting sheet is used to connect with a battery module,

[0007] The welding surface of the welding sheet is provided with protrusions, the protrusions are used for point welding with a control board, and an end edge of the welding sheet away from the bending sheet is provided with a welding gap, the welding gap is used for tin welding with the control board.

[0008] In one embodiment, teeth-shaped welding openings are provided at both ends of the welding sheet.

[0009] In one embodiment, the welding sheet is also provided with a tin leakage welding hole.

[0010] In one embodiment, the number of protrusions and welding gaps is multiple, and the multiple protrusions and welding gaps are arranged at intervals on the welding sheet.

[0011] In one of the embodiments, each of the convex points is arranged corresponding to each of the welding gaps.

[0012] In one of the embodiments, one end of the bending piece is formed with an arched bending part, and the bending part is connected to the welding piece.

[0013] In one of the embodiments, two side edges of the bending part are provided with first gaps.

[0014] In one of the embodiments, a center of the bending part is provided with a second gap, and the second gap is used for reinforcing welding.

[0015] In one of the embodiments, the cell connecting piece is provided with a connecting part, and the connecting part is used for elastically contacting a positive and negative connecting end of a battery module.

[0016] An energy storage battery comprises the multifunctional nickel piece, the control board and the power module in any of the above embodiments, the control board is installed on the power module, the welding piece is welded on the control board, and the cell connecting piece is connected to the battery module.

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

[0018] 1. The multifunctional nickel piece and the energy storage battery, the welding piece is spot welded with the control board through the convex points, so that the middle part of the welding piece is welded and fixed with the control board, the welding points of the welding piece and the control board are increased, the gap between the welding piece and the control board is increased, the liquid solder is more easily penetrated between the welding piece and the control board, and the welding strength between the welding piece and the control board is improved.

[0019] 2. The soldering is performed by opening the welding gaps on the edges of the welding piece, the welding part is lengthened, the molten liquid solder can be more fully contacted with the welding piece and the control board, so that the effective welding contact surface between the welding piece and the control board is increased, the welding strength between the welding piece and the control board is further improved, the risks of false welding and delamination between the welding piece and the control board are reduced, and the safety performance of the energy storage battery is improved.

[0020] 3. The bending between the bending piece and the welding piece makes the welding surface of the welding piece closely fit with the narrow welding surface of the control board, so that the soldering of the welding piece and the control board is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 Structure diagram of a multifunctional nickel sheet of an embodiment;

[0023] Figure 2 Structure diagram of a part of an energy storage battery of an embodiment;

[0024] Figure 3 Structure diagram of a part of an energy storage battery of an embodiment; Figure 2 Structure diagram of a part of an energy storage battery of an embodiment; DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the related drawings. The 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, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive.

[0026] 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 be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terminology used in the description of the present disclosure herein is only for the purpose of describing the specific embodiments and is not intended to limit the present disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below in combination with specific embodiments:

[0029] As shown in Figures 1 to 3As shown, the multifunctional nickel sheet 10 of an embodiment of the present disclosure includes an electric core connecting sheet 100, a bending sheet 200, and a welding sheet 300. One end of the bending sheet 200 is connected to the electric core connecting sheet 100, and the bending sheet 200 is bent with the electric core connecting sheet 100 to be inclined between the bending sheet 200 and the electric core connecting sheet 100. The other end of the bending sheet 200 is connected to the welding sheet 300, and the bending sheet 200 is bent with the welding sheet 300 to be inclined between the bending sheet 200 and the welding sheet 300. The electric core connecting sheet 100 is used to be connected with the battery module 30.

[0030] Further, the welding surface of the welding sheet 300 is provided with a convex point 310 for spot welding with the control board 20. An edge of the welding sheet 300 away from the bending sheet 200 is provided with a welding gap 301 for tin soldering with the control board 20.

[0031] In the embodiment, the welding sheet 300 is first attached to the predetermined welding position of the control board 20, so that the convex point 310 of the welding sheet 300 is in close contact with the control board 20. The existence of the convex point 310 causes a gap between the welding sheet 300 and the control board 20. Spot welding is performed on the convex point 310 and the control board 20, so that the middle position of the welding sheet 300 is welded and fixed with the control board 20. Tin soldering is then performed between the welding gap 301 of the welding sheet 300 and the control board 20. Liquid solder can fill the gap between the welding sheet 300 and the control board 20, so that the solder is in sufficient contact with the welding sheet 300 and the control board 20, respectively. Thus, the welding area between the welding sheet 300 and the control board 20 is increased, and sufficient solder paste exists between the welding sheet 300 and the control board 20 from the edge to the center position.

[0032] The multifunctional nickel sheet 10 described above, the welding sheet 300 is spot welded with the control panel 20 through the convex point 310, so that the middle part of the welding sheet 300 is welded and fixed with the control panel 20, the welding points of the welding sheet 300 and the control panel 20 are increased, and the gap between the welding sheet 300 and the control panel 20 is increased, so that the liquid solder is more easily penetrated between the welding sheet 300 and the control panel 20, and the welding strength of the welding sheet 300 and the control panel 20 is improved; the soldering is carried out by opening the welding gap 301 at the edge of the welding sheet 300, the welding part is prolonged, the molten liquid solder can be more fully contacted with the welding sheet 30 and the control panel 20, so as to increase the effective welding contact surface between the welding sheet 30 and the control panel 20, further improve the welding strength between the welding sheet 300 and the control panel 20, thereby reducing the risk of false welding and welding between the welding sheet 300 and the control panel 20, and further improving the safety performance of the energy storage battery. The bending between the bending sheet 200 and the welding sheet 300 makes the welding surface of the welding sheet 300 closely fit with the narrow welding surface of the control panel 20, thereby facilitating the soldering of the welding sheet 300 and the control panel 20.

[0033] As shown in Figure 1 one of the embodiments, the welding sheet 300 has welding gaps 302 at both ends of the edge. In this embodiment, the welding gaps 302 of the welding sheet 300 increase the welding area of the welding sheet 300 and the control panel 20, so that more intermetallic bonding points can be formed during the welding process, thereby reducing the risk of false welding and welding between the welding sheet 300 and the control panel 20.

[0034] As shown in Figure 1 one of the embodiments, the welding sheet 300 also has solder leakage holes 303. In this embodiment, when the welding sheet 300 is welded with the control panel 20, the solder leakage holes 303 can also be used for welding, which is beneficial to the penetration of liquid solder between the welding sheet 300 and the control panel 20, so that the welding of the welding sheet 300 is more stable.

[0035] As shown in Figure 1 one of the embodiments, the number of convex points 310 and welding gaps 301 is multiple, and the multiple convex points 310 and welding gaps 301 are arranged at intervals on the welding sheet 300. In this embodiment, the multiple welding gaps 301 increase the welding area of the welding sheet 300 and the pad, improve the strength of the welding sheet 300 and the control panel 20, and the multiple convex points 310 further enhance the strength of the connection between the welding sheet 300 and the control panel 20, avoiding false welding between the welding sheet 300 and the control panel 20.

[0036] As shown in Figure 1As shown, in one embodiment, each protrusion 310 is correspondingly provided with each welding notch 301. In this embodiment, after the welding piece 300 welds the welding notches 301 and protrusions 310, the overall strength of the welding piece 300 and the control plate 20 is further enhanced through the synergistic connection of the corresponding welding notches 301 and protrusions 310.

[0037] like Figure 1 As shown, in one embodiment, one end of the bent piece 200 has an arched bend 210, which is connected to the welded piece 300. In this embodiment, the bend 210 has a certain degree of elasticity and toughness, which allows the bend 210 to mitigate the impact of vibration, thereby improving the stability and reliability between the welded piece 300 and the bent piece 200.

[0038] like Figure 1 As shown, in one embodiment, the two sides of the bent portion 210 are provided with first notches 2101. In this embodiment, when the bent portion 210 is bent, a large amount of stress tends to accumulate in the bending area. The first notches 2101 of the bent portion 210 can release the stress, thereby improving the structural strength of the bent portion 210 and enhancing its durability and reliability.

[0039] like Figure 1 As shown, in one embodiment, a second notch 2102 is provided at the center of the bent portion 210, and the second notch 2102 is used for reinforcing the welding. In this embodiment, soldering is performed through the second notch 2102 at the center of the bent portion 210, so that the liquid solder fills the gap between the welding surface of the bent portion 210 and the control board 20, increasing the welding point between the middle position of the welding piece 300 adjacent to the bent portion 210 and the control board 20, thereby improving the connection strength between the welding piece 300 and the control board 20.

[0040] like Figure 1 As shown, in one embodiment, the cell connecting piece 100 has a protruding connecting portion 110, which is used to elastically connect with the positive and negative terminals of the battery module 30. In this embodiment, the connecting portion 110 has a certain elasticity through bending protrusion. The elastic connection between the connecting portion 110 and the terminal of the battery module 30 ensures good contact between the connecting portion 110 and the positive and negative terminals of the battery module 30, thereby improving the stability and reliability of the connection between the connecting portion 110 and the battery module 30.

[0041] like Figure 2 and Figure 3As shown, the application also provides an energy storage battery including the multifunctional nickel sheet 10, the control board 20 and the power module 30 in any of the above embodiments, the control board 20 is installed on the power module 30, the welding sheet is welded on the control board 20, and the cell connecting sheet 100 is connected to the battery module 30. In this embodiment, the welding sheet 300 is welded after being fitted with the welding position of the control board 20, the convex point 310 is fixed by convex point welding with the control board 200, the gap between the welding sheet 300 and the control board 20 is increased, the liquid solder is more easily penetrated between the welding sheet 300 and the control board 20, the welding gap 301 increases the contact area of the soldering of the welding sheet 300, the connection strength between the welding sheet 300 and the control board 20 is improved, the false welding and the delamination of the welding sheet 300 and the control board 20 are reduced, and thus the safety performance of the energy storage battery is improved.

[0042] Compared with the prior art, the present disclosure has at least the following advantages:

[0043] 1. The multifunctional nickel sheet 10 and the energy storage battery described above, the welding sheet 300 is welded by the convex point 310 with the control board 20, so that the middle part of the welding sheet 300 is welded and fixed with the control board 20, the welding points of the welding sheet 300 and the control board 20 are increased, and the gap between the welding sheet 300 and the control board 20 is increased, so that the liquid solder is more easily penetrated between the welding sheet 300 and the control board 20, and the welding strength of the welding sheet 300 and the control board 20 is improved.

[0044] 2. The soldering is performed by opening the welding gap 301 at the edge of the welding sheet 300, the welding position is prolonged, the molten liquid solder can more fully contact the welding sheet 30 and the control board 20, the effective welding contact surface between the welding sheet 30 and the control board 20 is increased, the welding area between the welding sheet 300 and the control board 20 is increased, the welding strength between the welding sheet 300 and the control board 20 is further improved, the risk of false welding and delamination between the welding sheet 300 and the control board 20 is reduced, and thus the safety performance of the energy storage battery is improved.

[0045] 3. The bending between the bending sheet 200 and the welding sheet 300 makes the welding surface of the welding sheet 300 closely fit between the narrow welding surface of the control board 20, so that the soldering of the welding sheet 300 and the control board 20 is facilitated.

[0046] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A multifunctional nickel sheet, comprising an electric core connecting sheet, a bending sheet and a welding sheet, one end of the bending sheet is connected to the electric core connecting sheet, the bending sheet is bent between the electric core connecting sheet, so that the bending sheet and the electric core connecting sheet are inclined, the other end of the bending sheet is connected to the welding sheet, the bending sheet is bent between the welding sheet, so that the bending sheet and the welding sheet are inclined, the electric core connecting sheet is used to connect with a battery module, characterized in that, a welding surface of the welding sheet is convexly provided with a convex point, the convex point is used for point welding with a control board, an edge of the welding sheet away from the bending sheet is provided with a welding notch, the welding notch is used for tin soldering with the control board. The two edges of the welding sheet are provided with tooth-shaped welding openings.

2. The multi-functional nickel sheet according to claim 1, wherein The welding sheet is also provided with a tin leakage hole.

3. The multi-functional nickel sheet according to claim 1, wherein The number of the convex points and the welding notches is multiple, and multiple convex points and multiple welding notches are arranged at intervals on the welding sheet.

4. The multi-functional nickel sheet according to claim 1, wherein Each of the convex points and each of the welding notches is arranged correspondingly.

5. The multi-functional nickel sheet according to claim 4, wherein One end of the bending sheet is formed with an arc-shaped bending part, and the bending part is connected to the welding sheet.

6. The multi-functional nickel sheet according to claim 1, wherein First notches are arranged at the two side edges of the bending part.

7. The multi-functional nickel sheet according to claim 6, wherein A second notch is arranged at the center of the bending part, and the second notch is used for reinforcing welding.

8. The multi-functional nickel sheet according to claim 6, wherein The electric core connecting sheet is convexly provided with a connecting part, and the connecting part is used for elastic contact with positive and negative connecting ends of the battery module.

9. The multi-functional nickel sheet according to claim 1, wherein The multifunctional nickel sheet, the control board and the power module are arranged according to any one of claims 1 to 9, the control board is installed on the power module, the welding sheet is welded on the control board, and the electric core connecting sheet is connected to the battery module.

10. An energy storage cell, characterized by ​

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