Composite pole and battery module with same

Abstract

The invention discloses a composite pole. The composite pole comprises a first end and a second end which are made of different metal materials, wherein the end connected with an external conductor is made of a metal material same with the external conductor; the welding between the same metals has no difficulty in the welding of different metals during the welding process; compared to the welding of different metals, easiness in operation is realized; and meanwhile, the same strength is easy to achieve at a welding point, and the electrocorrosion is unlikely to occur.

Description

technical field

[0001] The invention relates to the field of batteries, in particular to a composite pole made of different metal materials and a battery module with the composite pole. Background technique

[0002] The power battery pole is the terminal that leads the internal current of the battery to the outside of the battery. In fields such as electric vehicles, it is often necessary to combine individual battery modules in series or in parallel to form a battery pack. Generally speaking, the positive pole of the battery is usually aluminum, and the negative pole is usually copper. Therefore, no matter Whether copper bus bars are used as the external conductors connecting the individual cells or aluminum bus bars are used as the external conductors connecting the individual cells, welding of dissimilar metals occurs in the connection of individual cell modules.

[0003] However, there are not only certain difficulties in the welding process between dissimilar metals, b...

Examples

Embodiment 1

[0034] like figure 1 As shown, the present embodiment provides a composite pole. The composite pole 1 includes a first end 11 and a second end 12 made of different metal materials; The outer conductor 4 is made of the same metal material.

[0035] The composite pole 1 provided in this embodiment includes a first end 11 and a second end 12 made of different metal materials, and the end connected to the outer conductor 4 is made of the same metal material as the outer conductor 4 ; Therefore, the welding between the same metals does not have the difficulty of dissimilar metal welding during the welding process, and is easier to operate than dissimilar metal welding.

[0036] Specifically, the first end 11 is made of copper material, and the second end 12 is made of aluminum material; when the outer conductor 4 is made of copper material, the first end of the composite pole 1 One end 11 is directly connected to the outer conductor 4; when the outer conductor 4 is made of alumin...

Embodiment 2

[0042] On the basis of Example 1, this example further provides a method for preparing the above-mentioned composite pole 1;

[0043] a. Explosive composite method or diffusion welding or friction welding or brazing or rolling composite method or hot-melt rolling method will be used to prepare two different metal materials for the first end 11 and the second end 12 Made into one body to obtain a composite board;

[0044] b. Level the composite board;

[0045] c. Cutting or punching out the composite pole along the direction perpendicular to the composite plate.

[0046] As a preferred embodiment, the composite board is prepared by explosive composite method; specifically, when preparing the composite board, the doubler board is first placed on the substrate, and then a layer of explosive is laid on the doubler board to utilize the explosion generated by the explosive The instantaneous ultra-high pressure and ultra-high-speed impact realize the solid-state metallurgical bondi...

Embodiment 3

[0050] like figure 2 As shown, on the basis of the above embodiments, this embodiment further provides a battery module, including several single cells 3, and the electrode terminals between two adjacent single cells 3 are connected through external conductors 4, The electrode terminal includes a conventional pole 2, and a negative / positive pole composed of the composite pole 1 as described above; wherein, the metal material used at the end of the composite pole 1 connected to the external conductor is the same as The conventional pole 2 and the outer conductor 4 are made of the same metal material. Wherein, in this embodiment, the composite pole 1 , the conventional pole 2 and the outer conductor 4 are connected by welding; meanwhile, the outer conductor 4 can also be covered with a layer of nickel.

[0051] In this embodiment, the electrode terminals of the battery module include a positive pole / negative pole formed by a conventional pole 2, and a negative pole / positive po...

technical field

[0001] The invention relates to the field of batteries, in particular to a composite pole made of different metal materials and a battery module with the composite pole. Background technique

[0002] The power battery pole is the terminal that leads the internal current of the battery to the outside of the battery. In fields such as electric vehicles, it is often necessary to combine individual battery modules in series or in parallel to form a battery pack. Generally speaking, the positive pole of the battery is usually aluminum, and the negative pole is usually copper. Therefore, no matter Whether copper bus bars are used as the external conductors connecting the individual cells or aluminum bus bars are used as the external conductors connecting the individual cells, welding of dissimilar metals occurs in the connection of individual cell modules.

[0003] However, there are not only certain difficulties in the welding process between dissimilar metals, b...

Examples

Embodiment 1

[0034] like figure 1 As shown, the present embodiment provides a composite pole. The composite pole 1 includes a first end 11 and a second end 12 made of different metal materials; The outer conductor 4 is made of the same metal material.

[0035] The composite pole 1 provided in this embodiment includes a first end 11 and a second end 12 made of different metal materials, and the end connected to the outer conductor 4 is made of the same metal material as the outer conductor 4 ; Therefore, the welding between the same metals does not have the difficulty of dissimilar metal welding during the welding process, and is easier to operate than dissimilar metal welding.

[0036] Specifically, the first end 11 is made of copper material, and the second end 12 is made of aluminum material; when the outer conductor 4 is made of copper material, the first end of the composite pole 1 One end 11 is directly connected to the outer conductor 4; when the outer conductor 4 is made of alumin...

Embodiment 2

[0042] On the basis of Example 1, this example further provides a method for preparing the above-mentioned composite pole 1;

[0043] a. Explosive composite method or diffusion welding or friction welding or brazing or rolling composite method or hot-melt rolling method will be used to prepare two different metal materials for the first end 11 and the second end 12 Made into one body to obtain a composite board;

[0044] b. Level the composite board;

[0045] c. Cutting or punching out the composite pole along the direction perpendicular to the composite plate.

[0046] As a preferred embodiment, the composite board is prepared by explosive composite method; specifically, when preparing the composite board, the doubler board is first placed on the substrate, and then a layer of explosive is laid on the doubler board to utilize the explosion generated by the explosive The instantaneous ultra-high pressure and ultra-high-speed impact realize the solid-state metallurgical bondi...

Embodiment 3

[0050] like figure 2 As shown, on the basis of the above embodiments, this embodiment further provides a battery module, including several single cells 3, and the electrode terminals between two adjacent single cells 3 are connected through external conductors 4, The electrode terminal includes a conventional pole 2, and a negative / positive pole composed of the composite pole 1 as described above; wherein, the metal material used at the end of the composite pole 1 connected to the external conductor is the same as The conventional pole 2 and the outer conductor 4 are made of the same metal material. Wherein, in this embodiment, the composite pole 1 , the conventional pole 2 and the outer conductor 4 are connected by welding; meanwhile, the outer conductor 4 can also be covered with a layer of nickel.

[0051] In this embodiment, the electrode terminals of the battery module include a positive pole / negative pole formed by a conventional pole 2, and a negative pole / positive po...

Images