Pressure balance capacitor

Abstract

The invention discloses a pressure balance capacitor which comprises a capacitor core group, a capacitor outer shell, a capacitor shell cover, a leading-out terminal, a leading wire and a balance valve. A transverse sealing wall and a vertical sealing wall are arranged in the capacitor outer shell and divide the interior of the capacitor outer shell into an opening portion, a core group portion and a pressure cabin. The capacitor shell cover is combined with the opening portion in a buckled mode. The leading-out terminal is fixedly arranged on the capacitor shell cover and electrically connected with a capacitor core group through the leading wire. The capacitor core group is located at the core group portion. The pressure cabin is filled with high-pressure filling gas. The capacitor outer shell is provided with a chute for being communicated with the core group portion, the pressure cabin and the outside air. The balance valve is arranged in the chute. Through the reasonable design of the internal structure of the capacitor and through the arrangement of the balance valve, the pressure balance capacitor can adapt to the change of the outside air pressure by itself, and enables the internal pressure to be always the same as the outside air pressure, so the sealing performance of the capacitor is improved and the probabilities of capacitor breakage and electrical performance degradation are reduced.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a pressure balancing capacitor. Background technique [0002] Gas-filled capacitors are filled with inert gas (such as nitrogen) to slow down the oxidation rate of components inside the capacitor and improve the insulation performance between components inside the capacitor. However, the internal pressure of the gas-filled capacitor also needs to be strictly controlled. If the internal pressure is too high, the capacitor will rupture and the contents will leak out; if the internal pressure is too low, it will affect the electrical performance of the capacitor and accelerate the oxidation of the components inside the capacitor. Shorten the life of the capacitor. However, when applied in different environments, different altitudes, or even in different seasons and different times in the same area, there are large fluctuations in the change of external air pressure, which poses ...

AI Technical Summary

Problems solved by technology

However, the internal pressure of the gas-filled capacitor also needs to be strictly controlled. If the internal pressure is too high, the capacitor will rupture and the contents will leak out; if the internal pressure is too low, it will affect the electrical performance of the capacitor and accelerate the oxidation of the components inside the capacitor. Shorten the life of the capacitor

However, when applied in different environments, different altitudes, or even in different seasons and different times in the same area, there are large fluctuations in the change of external air pressure, which poses a huge test to the sealing performance of gas-filled capacitors.

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