Battery or capacitor packaging housing

Abstract

The invention provides a packaging shell body of a battery capacitor, which comprises a shell main body and combined cover plates welded at the two ends of the shell main body. The shell main body and the combined cover plates are respectively made of aluminum alloy materials. A plurality of pole holes are arranged on the combined cover plates, grooves are designed at the periphery of the pole holes, and a safety anti-explosion valve is also provided. The safety anti-explosion valve and the combined cover plates are formed in an integrated manner. The safety anti-explosion valve and the shell body can also be formed in an integrated manner. The safety anti-explosion valve can be welded on an end cover plate or the shell body. Compared with the present packaging shell body made of other materials, the packaging shell body of the battery capacitor in the invention is more excellent in performance and is more suitable for being used by a power-type large-sized energy storage element and a mobile element. Moreover, the packaging shell body endures corrosion and extreme temperature. The combined safety anti-explosion valve can prevent the hidden danger of battery explosion caused by over high internal pressure of the battery capacitor.

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] Steel series battery or capacitor packaging shells are mostly made of stainless steel (SUS304, SUS316, etc.) or nickel-plated ordinary steel strips.

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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