Battery or capacitor packaging housing

Abstract

The invention provides a battery or capacitor packaging housing, which comprises a housing body, a cover plate (including a simple cover plate and a combined cover plate) welded at two ends of the housing body, and an explosion-proof injection and suction device, wherein the housing is mainly made of aluminum alloy or magnesium alloy material. A plurality of post holes are formed on the combined cover plate; positive and negative posts of the battery or capacitor penetrate through the post holes; positive and negative electrode plates of the battery or capacitor are connected with the respective posts by screw-fastening, riveting or welding; a base of the explosion-proof injection and suction device can be arranged on the cover plate or on the housing body, and can be integrated with the cover plate or the housing body or connected with the cover plate or the housing body in other manners (such as wielding); an explosion-proof kernel of the explosion-proof injection and suction device can be disassembled and replaced repeatedly; and the explosion-proof injection and suction device can prevent the occurrence of harmful explosion caused by overlarge pressure in the battery or capacitor, and also can be used as a channel for taking or placing materials in the product fabrication or maintenance; and wire thread inserts can be mounted on one or more parts of the housing, where threads are arranged. The material of the battery or capacitor packaging housing has the excellent performances, such as high weldability, light weight, high strength, high corrosion resistance, and high resistance to extreme temperatures. The battery or capacitor packaging housing has better performance than the existing similar housing, and is more suitable for the large-size energy storage elements and mobile elements in the new energy industry and new energy vehicle industry. Accordingly, the battery or capacitor packaging housing has important application value.

Description

technical field [0001] The invention relates to the technical field of battery or capacitor manufacturing, in particular to the material, structure, function and processing of a high-capacity and high-power energy storage battery or capacitor housing in the new energy industry and the new energy automobile industry. Background technique [0002] The new energy industry and the new energy automobile industry belong to the "seven strategic emerging industries" determined by the state. At present, the specifications of batteries and capacitors have rapidly expanded from the previous focus on the electronics industry to the new energy industry and the new energy automobile industry, and are developing towards large-scale, high-current, high-capacity, and high-power. [0003] The new energy vehicle itself is a system engineering, and its power energy system - energy storage battery or capacitor, is equivalent to the heart of an organism, and must continuously supply the entire sy...

AI Technical Summary

Problems solved by technology

This manufacturing process is suitable for manual work, and the dimensional accuracy is difficult to guarantee. It is not suitable for the production of large-volume, high-precision energy storage power batteries or capacitors; another disadvantage is that it increases the amount of welding, and welding strength is a technical difficulty.

The disadvantages of using this material in batteries or capacitors are: First, the thermal conductivity, temperature coefficient, thermal shrinkage rate, expansion coefficient and other physical parameters of the three materials are inconsistent, and the temperature of the application environment is constantly changing. If it is increased, it will inevitably affect the bonding between nylon, aluminum foil and PP, resulting in the peeling of the bonding layer; secondly, in terms of molecular barrier, nylon and PP have little effect. After stretching, bending, heat sealing and other processes, it is easy to produce quality problems such as aluminum foil cracks and pinholes, resulting in the scrapping of the entire battery or capacitor product; moreover, the thickness of the aluminum-plastic composite film determines its limited weight. It is suitable for packaging batteries or capacitors used in the electronics industry with substances below a few hundred grams, but not suitable for packaging materials for large batteries or capacitors in the new energy industry and new energy automobile industry that weigh several kilograms or even tens of kilograms

Batteries or capacitors that use a plastic shell to contain an electrolyte system containing a non-aqueous solvent, due to the inherent properties of the plastic polymer material itself - cannot completely block molecular leakage, air entering it will poison the electrolyte, resulting in failure of the battery or capacitor ;Long-term storage and use of lithium batteries with organic solvent electrolytes in plastic shells will cause aging, swelling and deformation of plastic materials, which will lead to the failure of lithium batteries

[0008] The battery or capacitor case of the steel series is mostly made of stainless steel (SUS304, SUS316, etc.) or nickel-plated ordinary steel strips, and its disadvantages: large specific

The follow-up process operations of nickel-plated steel shells, such as grooving, sealing, welding, etc., will bring certain damage to the plating layer of the shell, resulting in the exposure of steel and the generation of metal shavings, which are hidden dangers to product quality. For example, in 2008 Explosion of 18650 single cell batteries in notebook computer batteries produced by SONY

[0009] Up to now, no patent reports on the application of magnesium alloys in batteries or capacitors have been retrieved

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