Power battery tab connecting structure with safety function

Abstract

The utility model discloses a power battery tab connecting structure with a safety function, which comprises a conducting bar support, a positive electrode welding part and a negative electrode welding part are respectively arranged at two ends of the conducting bar support, and a positive electrode tab and a negative electrode tab are respectively welded on the positive electrode welding part and the negative electrode welding part; the positive pole lug and the negative pole lug are formed by stamping copper foils; the positive pole lug comprises a first welding piece welded with the positive pole welding part in an overlapping manner, a second welding piece welded with the positive pole of the power battery in an overlapping manner, and a fusing strip integrally formed and connected between the first welding piece and the second welding piece. The positive pole lug and the negative pole lug are respectively welded on the positive pole welding part and the negative pole welding part, the positive pole lug and the negative pole lug are formed by stamping the copper foil, and meanwhile, the positive pole lug is provided with the fusing strip, so that the product has a safety function, additional arrangement of a fuse is not needed, and convenience is brought to production and assembly of the power battery module.

Description

Technical Field

[0001] The utility model relates to the technical field of battery tabs, in particular to a connecting structure of power battery tabs with an insurance function. Background Technique

[0002] A power battery module is a power source that provides power for tools, mostly referring to a storage battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts. The power battery module is a core component of new energy vehicles and an important direction for future energy transformation. Its main difference from the starting battery used for starting a car engine. It mostly adopts a valve-regulated lead-acid battery, an open-type tubular lead-acid battery, and a lithium iron phosphate battery.

[0003] A power battery module usually consists of multiple power batteries, and these power batteries are connected in series and parallel through a conductive bar bracket. At present, a positive tab and a negative tab are arranged on the conductive bar bracket, and the positive tab and the negative tab are respectively welded and conducted with the positive electrode and the negative electrode of the corresponding power battery.

[0004] However, in the prior art, neither the positive tab nor the negative tab on the conductive bar bracket has an insurance function, and it is necessary to additionally set a fuse, which brings inconvenience to the production and assembly of the power battery module. Therefore, it is necessary to study a solution to solve the above problems. Content of the Utility Model

[0005] In view of this, in view of the deficiencies of the prior art, the main purpose of the present utility model is to provide a connecting structure of power battery tabs with an insurance function, which can effectively solve the problem that neither the positive tab nor the negative tab on the existing conductive bar bracket has an insurance function, resulting in inconvenience to the production and assembly of the power battery module.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A connecting structure of power battery tabs with an insurance function includes a conductive bar bracket. Both ends of the conductive bar bracket respectively have a positive welding part and a negative welding part, and a positive tab and a negative tab are respectively welded on the positive welding part and the negative welding part; both the positive tab and the negative tab are formed by stamping copper foil. The positive tab includes a first welding piece that is superposed and welded with the positive welding part, a second welding piece that is superposed and welded with the positive electrode of the power battery, and a fuse strip that is integrally formed and connected between the first welding piece and the second welding piece.

[0008] As a preferred solution, the thickness of the fuse strip is 0.2 mm, the width is 0.8 mm, and the cross-sectional area is 0.16 mm 2 , which can better play the role of fusing insurance.

[0009] As a preferred solution, there are multiple second welding tabs, and the multiple second welding tabs are arranged at intervals around the outer periphery of the first welding tab. A fusing strip is connected between each second welding tab and the first welding tab.

[0010] As a preferred solution, the fusing strip is horizontally bent to avoid being easily pulled and broken.

[0011] As a preferred solution, the second welding tab is circular to facilitate stable welding with the positive electrode of the power battery.

[0012] As a preferred solution, a first positioning hole is provided on the positive electrode welding part, a second positioning hole is formed on the first welding tab, and the second positioning hole is vertically aligned and communicated with the first positioning hole for positioning and installation, making the structure more stable.

[0013] As a preferred solution, there are two symmetrically arranged negative electrode welding parts on the left and right. A negative electrode tab is welded and fixed on each negative electrode welding part, and the two negative electrode tabs are symmetrically arranged on the left and right.

[0014] As a preferred solution, the thickness of the negative electrode tab is 0.2 mm and the width is 1.3 mm.

[0015] As a preferred solution, fixing holes are provided on the conductive bar bracket for external installation and fixation.

[0016] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0017] By welding a positive electrode tab and a negative electrode tab on the positive electrode welding part and the negative electrode welding part respectively, both the positive electrode tab and the negative electrode tab are formed by stamping copper foil, and at the same time, the positive electrode tab has a fusing strip, making the product have an insurance function and eliminating the need for additional setting of fuses, which brings convenience to the production and assembly of the power battery module.

[0018] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an assembled three-dimensional schematic diagram of a preferred embodiment of the present utility model;

[0020] Figure 2 is an assembled three-dimensional schematic diagram of another angle of a preferred embodiment of the present utility model;

[0021] Figure 3 is an exploded view of a preferred embodiment of the present utility model;

[0022] Figure 4 It is an exploded view of another angle of a preferred embodiment of the present utility model.

[0023] Description of the reference numerals in the drawings:

[0024] 10. Conductive bar bracket 11. Positive electrode welding part

[0025] 12. Negative electrode welding part 13. Fixing hole

[0026] 101. First positioning hole 20. Positive electrode tab

[0027] 21. First welding piece 22. Second welding piece

[0028] 23. Fuse strip 201. Second positioning hole

[0029] 30. Negative electrode tab Detailed implementation manners

[0030] Please refer to Figures 1 to 4 As shown, it shows the specific structure of a preferred embodiment of the present utility model, including a conductive bar bracket 10, a positive electrode tab 20 and a negative electrode tab 30.

[0031] Both ends of the conductive bar bracket 10 are respectively provided with a positive electrode welding part 11 and a negative electrode welding part 12. In this embodiment, the conductive bar bracket 10 is a copper bar bracket, which has good electrical conductivity. And, fixing holes 13 are provided on the conductive bar bracket 10 for external installation and fixation. And, the two negative electrode welding parts 12 are symmetrically arranged left and right, and each negative electrode welding part 12 is bent. In addition, a first positioning hole 101 is provided on the positive electrode welding part 11, the positive electrode welding part 11 is rectangular, and the two first positioning holes 101 are located at the diagonal positions of the positive electrode welding part 11. In addition, the thickness of the conductive bar bracket 10 is 1.5 mm.

[0032] The positive electrode tab 20 is welded to the positive electrode welding part 11; the positive electrode tab 20 is formed by stamping a copper foil. The positive electrode tab 20 includes a first welding piece 21 that is superposed and welded to the positive electrode welding part 11, a second welding piece 22 that is superposed and welded to the positive electrode of the power battery, and a fuse strip 23 integrally formed and connected between the first welding piece 21 and the second welding piece 22. In this embodiment, a second positioning hole 201 is provided on the first welding piece 21, and the second positioning hole 201 is vertically aligned and communicated with the first positioning hole 101 for positioning and installation, so that the structure is more stable. The second welding piece 22 is circular to ensure stable welding with the positive electrode of the power battery. There are multiple second welding pieces 22, and the multiple second welding pieces 22 are arranged at intervals around the outer periphery of the first welding piece 21. A fuse strip 23 is connected between each second welding piece 22 and the first welding piece 21 to connect with multiple power batteries simultaneously. And, the fuse strip 23 is in a horizontal bent shape to avoid being easily pulled and broken. In addition, the thickness of the fuse strip 23 is 0.2 mm, the width is 0.8 mm, and the cross-sectional area is 0.16 mm 2 , which can better play the role of fusing insurance.

[0033] The negative electrode tab 30 is welded to the negative electrode welding part 12, and the negative electrode tab 30 is formed by stamping a copper foil. In this embodiment, there are two negative electrode tabs 30, and the two negative electrode tabs are symmetrically arranged left and right. The two negative electrode tabs 30 are respectively superposed and welded to the two negative electrode welding parts 12. And, the thickness of the negative electrode tab 30 is 0.2 mm, and the width is 1.3 mm.

[0034] The manufacturing process of this embodiment is described in detail as follows:

[0035] During manufacturing, a conductive busbar bracket 10 is formed by stamping a copper plate, and a positive electrode tab 20 and a negative electrode tab 30 are formed by stamping a copper foil. Then, the positive electrode tab 20 and the negative electrode tab 30 are respectively superposed and welded and fixed on the positive electrode welding part 11 and the negative electrode welding part 12.

[0036] During use, the multiple second welding pieces 22 of the positive electrode tab 20 are welded and fixed to the positive electrodes of multiple power batteries, and the negative electrode tab 30 is welded to the negative electrode of another power battery. In this way, multiple series-connected power batteries are formed. When overloaded, the temperature of the fuse strip 23 will rise and fuse, triggering the BMS management system to start working, thereby protecting the battery circuit and improving the reliability and safety of the battery module.

[0037] The design focus of the present utility model lies in: by respectively welding a positive electrode tab and a negative electrode tab on the positive electrode welding part and the negative electrode welding part, both the positive electrode tab and the negative electrode tab are formed by stamping a copper foil, and at the same time the positive electrode tab has a fuse strip, so that the product has an insurance function and there is no need to set a fuse separately, which brings convenience to the production and assembly of the power battery module.

[0038] As described above, it is only the preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A power battery tab connection structure with a safety function, comprising a conductive bar bracket, characterized in that: The two ends of the conductive bar bracket are respectively provided with a positive electrode welding part and a negative electrode welding part, on which a positive electrode tab and a negative electrode tab are respectively welded; the positive electrode tab and the negative electrode tab are both formed by stamping copper foil, and the positive electrode tab includes a first welding piece overlapped and welded with the positive electrode welding part, a second welding piece overlapped and welded with the positive electrode of the power battery, and a fuse bar integrally formed between the first welding piece and the second welding piece.

2. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The thickness of the fuse bar is 0.2 mm, the width is 0.8 mm, and the cross-sectional area is 0.16 mm. 2 .

3. The power battery tab connection structure with insurance function according to claim 1, characterized in that: There are a plurality of second welding plates, which are arranged at intervals around the outer periphery of the first welding plate, and a fuse bar is connected between each second welding plate and the first welding plate.

4. The power battery tab connection structure with a safety function according to any one of claims 1 to 3, characterized in that: The fuse bar is horizontally bent.

5. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The second welding piece is circular.

6. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The positive electrode welding portion is provided with a first positioning hole, the first welding sheet is provided with a second positioning hole, and the second positioning hole is vertically opposite to and communicates with the first positioning hole.

7. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The number of the negative electrode welding parts is two and they are symmetrically arranged on the left and right. A negative electrode tab is welded and fixed on each negative electrode welding part. The two negative electrode tabs are symmetrically arranged on the left and right.

8. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The thickness of the negative electrode tab is 0.2 mm and the width is 1.3 mm.

9. The power battery tab connection structure with insurance function according to claim 1, characterized in that: The conductive bar bracket is provided with a fixing hole.

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