Vehicle-mounted high-frequency low-capacitance attenuation liquid aluminum electrolytic capacitor and production method thereof

Abstract

The invention discloses a vehicle-mounted high-frequency low-capacitance attenuation liquid aluminum electrolytic capacitor, which comprises an aluminum shell, a rubber tube, a guide pin group, a cover body, double-layer electrolytic paper, anode foil and cathode foil, wherein an opening is formed in one side of the upper end of the aluminum shell; the rubber tube is arranged on the outer side surface of the aluminum shell; the guide pin group is arranged in the aluminum shell and is positioned at the opening of the aluminum shell; the cover body is arranged at a position of the opening of the aluminum shell; the double-layer electrolytic paper is arranged on one side in the aluminum shell and serves as a substrate; and the anode foil and the cathode foil are arranged in the aluminum shell, located on the same side as the double-layer electrolytic paper and installed between the double-layer electrolytic paper at intervals in a penetrating mode. According to the vehicle-mounted high-frequency low-capacitance attenuation liquid aluminum electrolytic capacitor, the heat dissipation capability and the anti-pressure capability of the product structure can be remarkably improved, and the hydrogen production amount of the electrolyte is reduced by adding the novel synthetic auxiliary additive of the electrolyte, so that the capacitor can bear higher temperature, and the service life of the capacitor can be ensured.

Description

technical field [0001] The invention relates to a vehicle-mounted high-frequency low-capacity attenuation liquid aluminum electrolytic capacitor and a production method thereof. Background technique [0002] With the development of modern automobile industry and electronic technology, the vehicle entertainment system is developing towards the direction of integrated, intelligent, thin and full graphic vehicle information system platform. Terminal application requirements are more stringent than before, and the internal structure system also puts forward higher requirements, requiring less interference to audio and video playback, normal chip decoding, smooth video and audio playback, no stuttering, and no on-screen display Errors and poor sound quality. Therefore, the requirements for capacitor fading in high-frequency environment are more stringent. At present, the lifespan of aluminum electrolytic capacitors of low-voltage, high-frequency and low-resistance series on the ...

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Problems solved by technology

[0004] However, the current high-frequency low-capacity attenuation electrolytic capacitors can only work in the frequency range of less than 60KHZ due to design defects, and it is impossible to ensure that the capacity attenuation is within 80% above 60KHZ

The electrolyte uses ethylene glycol system plus pure water and other additives. Due to the large amount of pure water added, the risk of capacitor hydration increases exponentially. As the frequency continues to increase, the conductivity of pure water will decrease significantly. , so there will be a phenomenon that the tolerance failure exceeds 70%

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