Cold connection method of hard shell lithium battery pole and connecting piece
A lithium battery and connecting piece technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of difficult detection of over-welding, high risk of welding slag, and high welding cost, and achieve easy rework, increase contact area, Avoid costly effects of welding
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Embodiment 1
[0047] The following takes the series connection of two square aluminum shell single batteries as an example to introduce the cold connection method of the hard shell lithium battery pole and the connecting piece in this embodiment, including the following steps:
[0048] S1, providing incoming materials, including at least two metal casings 1 for prismatic lithium batteries and a metal connecting piece 3, the metal connecting piece 3 includes a connecting piece body 31 and two cladding parts 32;
[0049] S2, arrange two square lithium battery metal shells 1 side by side, arrange the two poles 29 (positive and negative poles) on the two metal shells 1 in a straight line, and then insert the two embedding grooves 320 on the metal connecting piece 3 On the poles 2 on two adjacent metal shells 1, the front and rear connecting surfaces 20 of the poles 2 are relatively embedded between the two inner walls of the groove 320; in this embodiment, the front and rear of the poles 2 A tr...
Embodiment 2
[0058] With the scheme of the first embodiment, although the protrusion 421 presses the first bending part 321 and the third bending part 323 and makes them concave, the concave part will rub against the surface of the pole 2, and the surface of the two parts will be removed. The oxide layer prevents the first bending portion 321 and the third bending portion 323 from being electrically disconnected from the pole 2 after the connection is completed. However, the inventor is still worried that the oxide layer at the contact between the pole 2 made of aluminum alloy or copper and the metal connection piece 3 is too thick, and the problem of electrical non-conduction occurs after the connection is completed. Therefore, the second embodiment has been further improved on the basis of the first embodiment, and the specific improvements are as follows:
[0059] The pole 2 and the metal connecting piece 3 are both made of aluminum alloy or copper; when the aluminum alloy is used, the ...
Embodiment 3
[0062] Adopting the scheme of the first embodiment, through the extrusion effect of the protrusion 421, it can ensure that the first bending part 321 and the third bending part 323 are riveted and fixed with the pole 2. There are still doubts about the electrical conductivity of the connecting piece 3, especially considering that hard-shell lithium batteries are often used in the vehicle environment, and long-term bumps and vibrations may cause poor contact between the pole 2 and the metal connecting piece 3 . Therefore, the third embodiment has been further improved on the basis of the first embodiment, and the specific improvements are as follows:
[0063] In the above S2, the metal shells 1 of the square lithium battery are first arranged side by side, and the poles 2 on each metal shell 1 are arranged in a straight line; ; Finally, the embedding groove 320 on the metal connecting piece 3 is embedded on the solder flakes 5 on the poles 2 on the two adjacent metal shells 1, ...
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