Connection method of terminals and busbars of lithium ion single battery

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiment is only an illustration of the gist of the present invention, rather than limiting the protection scope of the present invention.

[0020] like figure 1 As shown, the present invention provides a method for connecting lithium-ion battery terminals and busbars, which includes the following steps:

[0021] 1) Position and press the output terminal 2 of the lithium-ion single battery 1 and the busbar 3 with tooling;

[0022] 2) Expose the output terminal 2 of the lithium-ion single battery and the welding connection surface 4 of the busbar;

[0023] 3) Connect the output terminal 2 of the lithium-ion single battery and the bus bar 3 by laser welding.

[0024] This implementation mode can be further realized through the following steps:

[0025] In the aforementioned method for connecting the terminals of the lithium-ion single battery and the busbars, an appearance inspection is performed on the location of the fusion bonding site before step 3).

[0026] In the aforementioned method for connecting the terminals of the lithium-ion single battery and the busbars, in step 3), an appearance inspection is performed on the process of laser welding.

[0027] Preferably, the aforementioned method for connecting the terminals of the lithium-ion single battery to the busbar further includes the following steps:

[0028] 4) After step 3), visual inspection is carried out on the fusion bonding site.

[0029] Preferably, the aforementioned method for connecting the terminals of the lithium-ion single battery to the busbar further includes the following steps:

[0030] 4) After step 3), a four-terminal resistance measurement method is used for the fusion bonding site to measure the resistance value of the fusion bonding site.

[0031] Preferably, the aforementioned appearance inspection is CCD appearance inspection.

[0032] The aforementioned method for connecting the terminals of the lithium-ion single battery and the busbar, wherein, the output terminal 2 and the busbar 3 of the lithium-ion single battery are both made of aluminum.

[0033] Compared with the prior art, in the present invention, the output terminal of the lithium-ion monomer battery and the busbar welding joint surface are exposed and connected by laser welding, which can ensure good welding, high strength, reliable connection, and strong overcurrent capability; output Both the terminal and the busbar are made of aluminum, which has good conductivity and low cost; it can be used not only for small lithium-ion battery packs with few serial parallels, but also for large lithium-ion battery packs with multiple serial parallels, especially for large quantities The battery pack produced can be quickly and non-destructively tested. It is a lithium-ion battery pack connection technology with reliable connection quality, wide application range and high production efficiency. It is of great significance to ensure the performance of battery packs, reduce production costs and improve production efficiency.

[0034] The above descriptions are only preferred embodiments of the present invention, and any simple modifications and equivalent transformations made to the above embodiments according to the technical solution of the present invention fall within the scope of protection of the present invention.