Electrolytic Capacitor Quality Identification

Electrolytic capacitor is a capacitor formed by electrolysis between metal foil and electrolyte. The two plates of an electrolytic capacitor are separated by a thin layer of aluminum oxide, which acts as both an isolation and a dielectric. Electrolytic capacitors have the characteristics of small size, large capacity and stable quality, so they are widely used in the field of automotive electronics.
Electrolytic capacitors are used as voltage smoothing components in automotive electronic power circuits. By smoothing the power supply voltage, the operation of automotive electronic equipment is more stable and reliable.
In the case of electrolytic capacitor quality appraisal, Zhongke Testing can provide electrolytic capacitor quality appraisal services.

is divided into polarized electrolytic capacitors and non-polarized electrolytic capacitors according to the polarity of the pins.
non-polar electrolytic capacitors are divided into three types according to different uses: frequency dividing capacitors, S correction capacitors, and ordinary non-polar capacitors.
is divided into aluminum electrolytic capacitors, tantalum electrolytic capacitors, and niobium electrolytic capacitors based on manufacturing materials.

GB/T 22920-2022 Electrolytic capacitor paper
GB/T 3615-2016 Aluminum foil for electrolytic capacitors
GB/T 25121.2-2018 Rail transit Rolling stock equipment Power electronic capacitors Part 2: Non-solid electrolytic aluminum electrolytic capacitors
SJ/T 11140-2012 Electrode foil for aluminum electrolytic capacitors
SJ/T 10611-1994 CD17 type fixed aluminum electrolytic capacitor
SJ/T 11149.1-1997 Detailed specification for A-type aluminum shell for aluminum electrolytic capacitors
SJ/T 11149-1997 General specifications for aluminum shells for aluminum electrolytic capacitors
SJ/T 10390-1993 Drilling lead wires for electrolytic capacitors
JB/T 8596-1997 Electrolytic capacitors for starting AC motors
SJ/T 10223-1991 Key points for manufacturing quality control of tantalum electrolytic capacitors
0SJ/T 10222-1991 Key points for manufacturing quality control of aluminum electrolytic capacitors
1SJ/T 10557.1-1994 Technical conditions for aluminum foil for electrolytic capacitors
2SJ/T 10242-1991 Technical conditions for rubber sealing plugs for aluminum electrolytic capacitors
3SJ/T 10557.2-1994 Method for determination of grain texture of aluminum foil for electrolytic capacitors
4SJ/T 10557.4-1994 Method for chemical analysis of aluminum foil for electrolytic capacitors Determination of copper, iron, zinc, manganese and magnesium amounts by atomic absorption spectrophotometry
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The supplier and the buyer signed a "Sales Contract", agreeing that the buyer would purchase an "electrolytic capacitor machine" from the supplier and use it in its own lamps. During the process, it was discovered that the "electrolytic capacitor" inside the lamp had bulges and other faults after use. The buyer believed that these faults were caused by quality problems with the "electrolytic capacitors" provided by the supplier, while the supplier believed that these faults were caused by other components in the buyer's lamps.
In order to clarify whether there are quality problems with the "electrolytic capacitor machine" involved in the case, the buyer filed an application for quality appraisal of the "electrolytic capacitor machine".
***The court entrusted our company to identify the cause of the bulging of the "electrolytic capacitor machine" involved in the case.
identification analysis results: The
identification expert team analyzed and judged the identification matters of the "electrolytic capacitor machine" involved in the case based on the final on-site inspection and testing conditions, combined with the collected relevant case materials and information, and gave an identification opinion:
The reason for the bulging of the "electrolytic capacitor" in the "lighting driver" involved in the case should be the poor sealing performance of the "electrolytic capacitor".