Connection method of terminals and busbars of lithium ion single battery

A single battery and connection method technology, which is applied in the manufacture of battery pack components, battery boxes/jackets, electrolyte batteries, etc., can solve the problem that non-destructive testing of welding quality cannot be performed, rapid full inspection cannot be achieved, and welding quality is not controlled and other problems, to achieve the effect of low cost, good welding and high production efficiency

Pending Publication Date: 2019-07-02
天津蓝天特种电源科技股份公司
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AI-Extracted Technical Summary

Problems solved by technology

The welding quality of overlapping welding cannot be tested non-destructively. It is necessary to conduct destructive inspection and evaluation after regular welding with s...
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Method used

Compared with prior art, in the present invention, the output terminal of lithium-ion monomer battery and bus bar welding junction surface are exposed, and are connected by laser welding, can guarantee that welding is good, and intensity is high, and connection is reliable, and overcurrent capacity Strong; the output terminal and 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 fewe...
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Abstract

The invention provides a connection method of terminals and busbars of a lithium ion single battery. The connection method includes the following steps: 1) positioning and compacting the output terminals and the busbars of the lithium ion single battery by using a tool; 2) exposing welding joint surfaces of the output terminals and the busbars of the lithium ion single battery; and 3) connecting the output terminals and the busbars of the lithium ion single battery by laser beam welding. The connection method of the terminals and the busbars of the lithium ion single battery has the advantagesof reliable connection quality, good welding, high strength, strong overcurrent capability, convenient non-destructive testing, wide application range, low cost and high production efficiency.

Application Domain

Technology Topic

Battery terminalNondestructive testing +6

Image

  • Connection method of terminals and busbars of lithium ion single battery
  • Connection method of terminals and busbars of lithium ion single battery

Examples

  • Experimental program(1)

Example Embodiment

[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.
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Description & Claims & Application Information

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