Novel connecting piece laser welding double-pressure head

Abstract

The invention discloses a novel connecting piece laser welding double-pressure head. The novel connecting piece laser welding double-pressure head comprises a pressure head body, the pressure head body is provided with a first laser flow guide channel, a second laser flow guide channel, a first flow guide channel, a second flow guide channel and a flow guide port, wherein the first flow guide channel is in communication with the first laser flow guide channel and is used for introducing inert gas into the first laser flow guide channel; the second flow guide channel is in communication with the second laser flow guide channel and is used for introducing inert gas into the second laser flow guide channel; the flow guide port is used for discharging inert gas and welding slag; and the flow guide port is located in the bottom of the pressing head body. Aiming at the technical problems of insufficient welding, over welding, heating, explosion, explosion points, rupture, burrs and oxidation which are easily caused by laser welding, according to the novel connecting piece laser welding double-pressure head, the phenomena of insufficient welding, over welding, heating, explosion, explosion points, rupture, burrs and oxidation of a battery connecting piece can be effectively avoided, the problems of shrinkage of a battery diaphragm, aging of a tab sealing ring, liquid leakage of a battery cell and the like are also effectively avoided, and the welding yield of the PACK connecting piece and the cover plate connecting piece and the safety of a battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a novel connecting sheet laser welding double pressure head. Background technique [0002] No matter the current lithium power plant is equipped with a complete vehicle factory, a communication base station, an energy storage station or a civilian use, it is necessary to combine the batteries into groups, connect the related batteries in series and parallel through the bus bar and soft connection, and through thermal management And other battery hardware systems, through protection and PDU control, form a power battery pack. The process of assembling batteries into groups is called PACK, which can be a single battery or a series-parallel battery module. Under the background of the current new national standard, the demand for lithium batteries is increasing, and many lead-acid battery companies have also launched lithium battery products; among them, the lithium batter...

AI Technical Summary

Problems solved by technology

[0004] In addition, during the process of laser welding the connecting piece, due to problems such as false welding, over-welding, heating, explosion, explosion point, rupture, burr, oxidation, etc., it directly affects the power of the rectified power battery pack, and also directly affects overcurrent and short circuit. , open circuit, breakdown, fire and other phenomena, or the shrinkage of the cell diaphragm and the aging of the lug sealing ring due to laser welding of the connecting piece, resulting in battery leakage, short circuit in the battery, and fire in the battery, which have hidden dangers in battery safety

Images