Aluminum connecting piece capable of allowing large current to pass through

Abstract

The utility model discloses an aluminum connecting sheet capable of passing heavy current. The aluminum connecting sheet comprises a body, the body is made of an aluminum material, the body comprises a main body part, a bending part and a welding part which are integrally formed and connected, the bending part is formed by bending downwards at two ends of the main body part, the welding part extends outwards at one end of the bending part, and epoxy resin coatings are coated on the surfaces of the main body part and the bending part. By adopting the body made of the aluminum material, the lightweight design is realized, the internal resistance of aluminum is less than 0.05 m omega, stable passing of 350A current can be ensured, the temperature rise is less than 40K, the heat resistance is good, the epoxy resin coatings are coated on the surfaces of the main body part and the bending part, and the epoxy resin has good heat resistance, so that the LED lamp can work for a long time in an environment of-45-130 DEG C, and the service life of the LED lamp is prolonged. And the voltage resistance is good, the voltage resistance is 2,500 V-DC (direct current) (60 s), and the requirement of a 800V high-voltage quick charging technology is met.

Description

Technical Field

[0001] The utility model relates to battery field technology, in particular to an aluminum connecting piece capable of passing a large current. Background Art

[0002] A car is a non-track-borne vehicle that is powered by power and has four or more wheels. Traditional cars are powered by diesel or gasoline. In order to reduce the use of fossil energy and protect the environment, the country now advocates the use of new energy vehicles. New energy vehicles use lithium batteries as power batteries and provide power for the car.

[0003] In the production process of power batteries, a large number of single cells need to be connected in series or in parallel to achieve higher voltage and capacity to meet the use requirements of lithium power battery packs. Generally, in the assembly process of the battery module, a large number of connecting pieces are used to connect the single cells in series or in parallel. However, the existing connecting pieces cannot pass large currents for a long time. When the battery module obtains a higher voltage, the current passing through the connecting pieces also increases, causing the connecting pieces to easily fuse. At the same time, the heat resistance of the connecting pieces is poor. The lithium battery will heat up during use. The connecting pieces will absorb the heat emitted by the lithium battery, thereby increasing its temperature and accelerating its aging. Therefore, it is necessary to improve the existing connecting pieces. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an aluminum connecting piece that can pass large currents, which can effectively solve the problems that the existing connecting pieces cannot pass large currents and have poor heat resistance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An aluminum connecting piece capable of passing a large current comprises a main body; the main body is made of aluminum, and comprises a main body portion, a bending portion and a welding portion which are integrally formed and connected, the bending portion is bent downward at both ends of the main body portion, the welding portion extends outward at one end of the bending portion, and the surface of the main body portion and the surface of the bending portion are both coated with an epoxy resin coating.

[0007] As a preferred solution, the inner and outer surfaces of the main body and the inner and outer surfaces of the bending portion are coated with epoxy resin coating.

[0008] As a preferred solution, the thickness of the epoxy resin coating is 0.6-0.8 mm.

[0009] As a preferred solution, the corners of the welding portion are convexly formed with fixing portions, and each fixing portion is provided with a fixing hole.

[0010] As a preferred solution, a welding groove is formed by pressing on the bottom surface of the welding portion, and a welding hole is opened on the welding groove.

[0011] As a preferred solution, the thickness of the welding portion is 2.5 mm, and the thickness of the bottom end surface of the welding groove is 1.5 mm.

[0012] As a preferred solution, an arc-shaped notch is provided on one side of the main body, and an extension portion extends outwardly from the other side of the main body.

[0013] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0014] The aluminum body is lightweight, and the internal resistance of aluminum is less than 0.05mΩ, which can ensure the stable passage of 350A current, and the temperature rise is less than 40K, with good heat resistance. The surface of the main body and the surface of the bending part are coated with epoxy resin coating. The epoxy resin has good heat resistance and can work for a long time in an environment of -45℃-130℃. It also has good pressure resistance and can withstand 2500V-DC.

[0015] (60s), meeting the requirements of fast charging 800V high voltage technology.

[0016] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of another angle of a preferred embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional view of a preferred embodiment of the utility model.

[0020] Description of the accompanying drawings:

[0021] 10. Body 11. Main part

[0022] 12. Bending part 13. Welding part

[0023] 131. Welding groove 132. Welding hole

[0024] 14. Fixing portion 141. Fixing hole

[0025] 15. Arc notch 16. Extension

[0026] 20. Epoxy resin coating. DETAILED DESCRIPTION

[0027] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a main body 10.

[0028] The main body 10 is made of aluminum. The main body 10 includes a main body 11, a bending part 12 and a welding part 13 which are integrally formed and connected. The bending part 12 is bent downward at both ends of the main body 11. The welding part 13 extends outward at one end of the bending part 12. The surface of the main body 11 and the surface of the bending part 12 are coated with an epoxy resin coating 20. The epoxy resin coating 20 is selected so that the connecting piece can be -45°C

[0029] -130 ℃ environment for a long time work, thermal aging can reach 110 ℃ (168h), flame retardant grade is V0, withstand voltage 2500V-DC (60s), and make the connecting piece without breakdown or sparking, leakage current ≤0.1mA, insulation resistance 800MΩ (1500V-DC); meet the fast charging 800V high voltage technology; in this embodiment, the inner and outer surfaces of the main body 11 and the inner and outer surfaces of the bending part 12 are coated with epoxy resin coating 20; and the thickness of the epoxy resin coating 20 is 0.6- 0.8mm; in addition, the corners of the welding portion 13 are convexly formed with fixing portions 14, and each fixing portion 14 is provided with a fixing hole 141; the bottom surface of the welding portion 13 is pressed to form a welding groove 131, and the welding groove 131 is provided with a welding hole 132; specifically, the thickness of the welding portion 13 is 2.5mm, and the thickness of the bottom end surface of the welding groove 131 is 1.5mm; and, an arc-shaped notch 15 is provided on one side of the main body 11, and an extension portion 16 extends outward from the other side of the main body 11.

[0030] The design focus of the utility model is: by adopting an aluminum body, a lightweight design is achieved, and the internal resistance of aluminum is less than 0.05mΩ, which can ensure the stable passage of 350A current, and the temperature rise is less than 40K, with good heat resistance, and the surface of the main body and the surface of the bending part are coated with epoxy resin coating. The epoxy resin has good heat resistance and can work for a long time in an environment of -45℃-130℃, as well as good pressure resistance, with a pressure resistance of 2500V-DC (60s), meeting the fast charging 800V high voltage technology.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An aluminum connecting piece capable of passing a large current, characterized in that: It includes a main body; the main body is made of aluminum, and includes a main body part, a bending part and a welding part that are integrally formed and connected. The bending part is bent downward at both ends of the main body part, and the welding part extends outward at one end of the bending part. The surface of the main body part and the surface of the bending part are both coated with an epoxy resin coating.

2. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: The inner and outer surfaces of the main body and the inner and outer surfaces of the bending part are coated with epoxy resin coating.

3. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: The thickness of the epoxy resin coating is 0.6-0.8 mm.

4. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: The corners of the welding part are convexly formed with fixing parts, and each fixing part is provided with a fixing hole.

5. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: A welding groove is formed by pressing the bottom surface of the welding portion, and a welding hole is opened in the welding groove.

6. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: The thickness of the welding portion is 2.5 mm, and the thickness of the bottom end surface of the welding groove is 1.5 mm.

7. The aluminum connecting piece capable of passing a large current according to claim 1, characterized in that: An arc-shaped notch is provided on one side of the main body, and an extension portion is extended outwardly from the other side of the main body.

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