A kind of power lithium battery pole ear thermal composite molding process

Abstract

The invention discloses a power lithium battery tab thermal composite molding process, which specifically includes the following steps: step 1, preparing metal conductor strips; step 2, preparing tab glue; step 3, heating the prepared metal conductor strips, The prepared tab glue is fed to the surface of the heated metal conductor strip for thermocompression bonding, and the heating of the metal conductor strip is stopped after the thermocompression bonding is completed. The tab thermal composite molding process of the power lithium battery of the present invention has a stable tab structure, thermal conductivity, and insulating shoes that exceed similar products on the market, and the production cost does not increase significantly.

Description

technical field [0001] The invention relates to the field of lithium battery preparation, in particular to a heat-composite molding process for tabs of power lithium batteries. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by Gilbert N. Lewis. In the 1970s, M.S.Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream now. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Li-ion batteries do not contain metallic lithium and are rechargeable. Lithium metal ...

AI Technical Summary

Problems solved by technology

The tabs are mainly used to connect a single power lithium battery in series or in parallel. In order to prevent short circuit and other situations, the tabs mainly include metal conductor strips and tab rubber blocks connected to them. The tabs of the power lithium battery have relatively wide metal conductors. It is relatively thick, and it needs enough time to absorb a large amount of heat energy when it is thermally compounded with the tab glue. When the surface temperature exceeds the melting point of the tab glue, it can be tightly bonded with the tab glue. The existing tab glue material is easy to burn after long-term use. Falling off, insulation performance decline, the existing metal conductor strips cannot be firmly connected with the tab material, and its welding performance and anti-corrosion performance are not good, which affects the normal use of the battery, so it is necessary to design a power lithium battery Thermal Composite Molding Process