Cylinder battery capacitor

Abstract

The invention relates to a cylinder battery capacitor. The cylinder battery capacitor comprises a cylinder shaped shell with an opening formed in the top end and the sealed bottom, electrode sets arranged inside the shell, wherein the electrode sets comprise positive electrode plates, negative electrode plates, positive electrode ears connected with the positive electrode plates and negative electrode ears connected with the negative electrode plates. The cylinder battery capacitor further comprises a seal assembly arranged on the top of the cylinder shaped shell and an insulation basement membrane arranged on the bottom of the cylinder shaped shell. The periphery of the battery capacitor is welded with the cylinder shaped shell and the negative electrode ears, and the bottom of the sealing assembly and the positive electrode ears are connected in a rivet joint mode. By arranging the seal assembly inside the battery capacitor and achieving a complete sealing of the battery capacitor in a rivet joint mode, seal performance of the battery capacitor is improved.

Description

technical field [0001] The invention relates to the technical field of secondary power supplies, in particular to a cylindrical battery capacitor. Background technique [0002] Cylindrical battery capacitors, often used to make supercapacitors, are a new type of charge storage element. Compared with ordinary batteries, they have the advantages of large capacity, support for large current charge and discharge, long cycle life, and environmental protection and pollution-free. Energy release to meet high power requirements, so it has broad application prospects in new energy, transportation, industry and other fields, suitable for automatic meter reading (AMR) devices, GPS / GSM / ARGOS related systems, automotive devices, remote sensors, radio frequency Identification systems, emergency equipment and military products, etc. Since the field of use of cylindrical battery capacitors has high requirements on the sealing of battery capacitors, the sealing degree of cylindrical battery...

AI Technical Summary

Problems solved by technology

The inventor has found through long-term research that this sealing method will have the following disadvantages in the actual application process: during the welding process of the battery capacitor pole and the tab, the glass or ceramics are easily cracked or damaged due to external force, which will cause sealing gaps. Under the action of internal pressure, the electrolyte leaks at the pole end, which reduces the life of the battery capacitor; secondly, the glass and ceramics are relatively hard, and when the battery capacitor is vibrated, the glass and ceramics are easy to break or even fall off This results in failure of the battery capacitor; in addition, since the pole and the cover plate are made of metal, glass or ceramic sealant is used to seal the metal, the process is complicated and the manufacturing cost is high

Although this solution makes up for the lack of corrosion resistance of traditional glass or ceramic seals, it needs to use glass to seal the cover plate and pole, which will cause the thermal expansion coefficients of the cover plate and pole to be inconsistent due to different materials, thus Poor wettability and air tightness during sealing

In addition, the welding process equipment used is expensive, it is not easy to be widely promoted in the industry, and it is easy to produce impurities to pollute the battery capacitor

[0005] In addition, most of the cylindrical battery capacitors currently on the market adopt a semi-sealed structure, which cannot meet the sealing requirements of vehicle systems, smart gas meters, smart water meters and other fields (the air leakage rate is less than 1.0×10-7Pa m3 / s(He) )

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