Composite Pole Construction and Composite Glass Sealing Method for Aluminum Shell Power Lithium-ion Batteries

Abstract

The invention discloses a composite pole construction and a composite glass sealing method for an aluminum shell power lithium-ion battery, wherein the composite pole includes two forms: one is an electrode core column with a conical inner surface covered with a jacket, and the other is an electrode core column composed of A cylindrical section made of aluminum alloy or aluminum-based composite material or copper-based composite material, and the composite glass sealing method involves heat-resistant gaskets, sealing covers with stepped or cylindrical openings, composite sealing glass, heat-resistant gaskets The non-sinterable powder bed between the composite sealing glass, and the hot-press sealing method after assembling them; this patent uses a reinforcing toughening agent or filler to make the thermal shock resistance and the thermal shock resistance of the phosphate or titanate glass Improved mechanical shock resistance. Moreover, this patent uses a heterogeneous composite electrode to form a compression sealing method with the composite sealing glass and the aluminum or aluminum alloy battery case, which ensures the crack resistance of the composite glass under compressive stress and the battery Electrical insulation and airtightness of electrode seals.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a composite pole construction and a composite glass sealing method of an aluminum shell power lithium-ion battery. Background technique [0002] Electric vehicles do not need to burn gasoline, which is one of the development directions of green environmental protection. In fact, the development of automobiles is developing in the direction of electrification and intelligence. The power source of an electric vehicle is a rechargeable lithium-ion battery, and its important components include the positive and negative electrodes in the battery unit, the diaphragm, the electrolyte (liquid), and the packaging of the battery unit. Academia and industry have focused on electrode materials, diaphragm materials, and electrolyte materials in order to improve the energy density and charge-discharge performance of lithium-ion batteries. Advanced sealing technology has not attr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite pole construction and a composite glass sealing method for an aluminum shell power lithium-ion battery, so as to solve the problem that the existing plastic sealing in the above background technology is not temperature-resistant, easily corroded, aging, and temperature-resistant. Poor change performance, not anti-vibration, short life, no chemical bond at the interface, easy to leak; when metallized ceramics are sealed, it is difficult to weld between ceramics and metals, metallized materials are not corrosion-resistant, ceramics are fragile, and residual thermal stress is generated during welding , Corrosion and interface thermal stress lead to damage to the reliability, stability, and service life of the seal, in addition to the disadvantage of complex manufacturing process; and the existing sealing glass has poor thermal shock resistance and mechanical shock resistance question

Images