Method for sealing seal washer of aluminum casing power lithium ion battery and composite glass

Abstract

The invention discloses a method for sealing a seal washer of an aluminum casing power lithium ion battery and composite glass. The method comprises the following steps of processing a multi-layer compounded type temperature-resistant washer 130, wherein the temperature-resistant washer 130 contains phosphate glass with anti-hydrofluoric acid corrosion property and glass ceramic powder filler withhigh heat expansion coefficient; enabling the temperature-resistant washer to penetrate through an electrode pole 110, putting onto the upper surface of a bottom plate of the electrode pole, fixing by a sealing clamp, and placing a layered composite sealing glass prefabricated body 140 at the upper surface of the temperature-resistant washer and between a sealing cover plate 120 and the electrodepole; finally, sending an anti-oxidizing aluminum cathode pole assembly into a sealing furnace to seal in air, and sending an anode pole assembly containing a copper or copper alloy bottom plate intoa furnace with atmosphere protection (vacuum or N2 (nitrogen)) to seal, so as to obtain the glass sealing effect with the advantages that compared with the plastic mechanical pressing and sealing technique, the airtightness is good; compared with the ceramic metallic sealing technique, the technology is simple; compared with the plastic sealing technique, the weather-resistant property is good.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a sealing gasket and composite glass sealing method of an aluminum shell power lithium ion battery. Background technique [0002] A battery refers to a cup, tank or other container or a part of a composite container that contains an electrolyte solution and a metal electrode to generate current. It is a device that can convert chemical energy into electrical energy. It has a positive pole and a negative pole. With the advancement of technology, the battery Generally refers to small devices that can generate electric energy, such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as an energy source can obtain stable voltage, stable current, and stable power supply for a long time. It has a small impact on the current, and the battery structure is simple, easy to ca...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a sealing gasket and a composite glass sealing method for an aluminum case power lithium-ion battery, to solve the problem of the existing composite pole construction and composite glass sealing of the aluminum case power lithium ion battery proposed in the above-mentioned background technology. There are still some unreasonable factors in the connection process. When the composite pole construction of the existing aluminum shell power lithium-ion battery is sealed with the composite glass, the plastic seal is not temperature-resistant, easy to be corroded, aged, and resistant to temperature changes. Poor performance, not anti-vibration, short life, no chemical bonding 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, the existing sealing glass has poor thermal shock resistance and mechanical shock resistance

Images