Abstract: Disclosed are a suspending agent for a negative electrode slurry of a lithium ion battery and a preparation method and application thereof. The suspending agent for the negative electrode slurry comprises the following ingredients in parts by weight: 87 parts to 94 parts of main suspending agent, 0.1 part to 1 part of solubilizing agent, 5 parts to 8 parts of synergist, and 0.1 part to 1 part of pH value regulator. According to the invention, by adding the suspending agent into the negative electrode slurry of the lithium ion battery, a traditional negative electrode suspending agent sodium carboxymethyl cellulose (hereinafter referred to as CMC) material can be replaced, the suspending agent has better suspension stability compared with the CMC material, an amount of the suspending agent is reduced compared with the CMC material.

Abstract: A cathode slurry of a lithium ion battery, comprising the following ingredients in parts by weight: 50 to 80 parts of solvent, 5 to 9 parts of secondary assistant, 10 to 40 parts of main dispersing agent, and 0.1 to 3 parts of pH value regulator; a dispersing agent is added into the cathode slurry of the lithium ion battery, so that a dispersity of a solid material in the cathode slurry is improved, and a viscosity of the slurry is reduced due to a good dispersity; when coating is carried out with the same viscosity, the cathode slurry added with the dispersing agent is used as a high-solid-content slurry, and multiple experiments show that, when a dispersing agent effective matter accounting for 0.3% of a total solid amount is added, a solid content is increased by 2% to 3% under the same viscosity.

Abstract: This invention provides a process and device for simultaneous laser welding; after using the moving lower die and the fixing upper die to make the base and the lens attached, by using the light pipe, for example, transparent substances or other cheap materials, to make the laser, which is emitted from the laser source, emit through the lens to a welding region of the base after being processed, to operate rapid and average heating to the welding region; meanwhile, using the welding cylinder to press the base and the lens together, to make base and the lens pressed and welded together in molten state, and when welding, it does not generate powder or other defects, and, at the same time, it can make the height H and the width w of the generated waste selvage between [0, 0.4] mm, which can improve the performance of welding object more efficiently.

Abstract: This invention provides a process and device for simultaneous laser welding; after using the moving lower die and the fixing upper die to make the base and the lens attached, by using the light pipe, for example, transparent substances or other cheap materials, to make the laser, which is emitted from the laser source, emit through the lens to a welding region of the base after being processed, to operate rapid and average heating to the welding region; meanwhile, using the welding cylinder to press the base and the lens together, to make base and the lens pressed and welded together in molten state, and when welding, it does not generate powder or other defects, and, at the same time, it can make the height H and the width w of the generated waste selvage between [0, 0.4] mm, which can improve the performance of welding object more efficiently.