Causes of leakage of aluminum electrolytic capacitor
Writer：Capacitor manufactur Source：Internet Time：2020-09-18 03:13:00
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【DESCRIPTION】：Leakage is one of the causes of capacitor failure, and aluminum electrolytic capacitor is no exception. The working electrolyte of aluminum electrolytic capacitor is acidic. If it overflows, it will seriously pollute and corrode other components and printed circuit board around the capacitor. At the same time, what is the cause of leakage of aluminum electrolytic capacitor inside the electrolytic capacitor?
Due to leakage, the working electrolyte dries up gradually and the ability to repair the anodic oxide film medium is lost, resulting in the breakdown of capacitor or deterioration of electrical parameters.
① The sealing of aluminum electrolytic capacitor is poor;
② If the aluminum electrolytic capacitor is sealed with rubber plug, the rubber may be aged and cracked due to its long service life;
③ There are some problems in mechanical seal technology;
④ Generally, the manufacturer will consider the problem of liquid leakage. They will specify in the enterprise standard that vertical installation is required, while some enterprises adopt horizontal installation.
Troubleshooting: if unreasonable welding leads to short-circuit fault of capacitor, the internal of capacitor will be heated rapidly. When the short-circuit current is too large, the cathode material inside the capacitor will melt and produce a large amount of gas, and the internal pressure will rise, and the sealed rubber or plastic material will curl. If there is smell or electrolyte overflow, do not touch it. If the gas enters the eyes or the inhalation mouth, wash it with clean water in time.
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Leakage is one of the causes of capacitor failure, and aluminum electrolytic capacitor is no exception. The working electrolyte of aluminum electrolytic capacitor is acidic. If it overflows, it will seriously pollute and corrode other components and printed circuit board around the capacitor. At the same time, what is the cause of leakage of aluminum electrolytic capacitor inside the electrolytic capacitor?
Due to leakage, the working electrolyte dries up gradually and the ability to repair the anodic oxide film medium is lost, resulting in the breakdown of capacitor or deterioration of electrical parameters.
① The sealing of aluminum electrolytic capacitor is poor;
② If the aluminum electrolytic capacitor is sealed with rubber plug, the rubber may be aged and cracked due to its long service life;
③ There are some problems in mechanical seal technology;
④ Generally, the manufacturer will consider the problem of liquid leakage. They will specify in the enterprise standard that vertical installation is required, while some enterprises adopt horizontal installation.
Troubleshooting: if unreasonable welding leads to short-circuit fault of capacitor, the internal of capacitor will be heated rapidly. When the short-circuit current is too large, the cathode material inside the capacitor will melt and produce a large amount of gas, and the internal pressure will rise, and the sealed rubber or plastic material will curl. If there is smell or electrolyte overflow, do not touch it. If the gas enters the eyes or the inhalation mouth, wash it with clean water in time.
