Quality inspection of electronic products -- Test standard and method for aging of capacitors

Date：2022-09-21 16:11:23Views：1112

Aging, also known as "sophistication", refers to the continuous application of a certain electrical stress to components at a certain ambient temperature for a long time, which accelerates various physical and chemical reaction processes inside the components through the combined action of electrical thermal stress, and promotes the early exposure of various potential defects hidden inside the components, so as to eliminate early failure products. Aging test is one of the screening methods to ensure the reliability level and quality of capacitors. Next, we will explain the relevant information of this test.

What is a capacitor?

Capacitance is used to characterize the energy storage capacity of electronic components under a certain potential difference. When the medium is filled between conductors, the charge moves under the activation of the electric field. The media restricts movement, so charges accumulate and are stored in the drive. The stored charges are called capacitors, and the electronic components that store the corresponding charges are called capacitors. Capacitors play an important role in tuning, bypass, coupling, filtering and other circuits. It is used for tuning circuits of transistor radios, CD players and recorders, as well as for coupling circuits and bypass circuits of color TV sets.

Purpose of capacitor aging test

Inspect the change of product performance and the reliability of the product as the use time goes by.

Aging test method for capacitors

1. Under normal temperature and rated voltage, keep it for 12 minutes, and the leakage current {When UR ≤ 100V, I ≤ 0.01CV or 3 μ A (whichever is greater); When UR ＞ 100V, I ≤ 0.0. CV+10 μ A｝

2. Under high temperature of 85 ℃ and rated voltage, the leakage current fluctuation shall be detected for 24 hours continuously

3. Record the data every 5 minutes. The leakage current shall not fluctuate greatly during aging and shall be less than 10 times of the initial limit value

4. Restore to normal temperature and keep it for 12 minutes

5. Monitor whether the leakage current, loss angle and insulation resistance meet the standard under normal temperature.

Capacitor test standard basis:

GB/T 2693-2001 IEC 60384-1:2016 Fixed Capacitors for Electronic Equipment Part 1: General Specification

GB/T 6346.14-2015 IEC 60384-14:2016 Fixed Capacitors for Electronic Equipment Part 14: Sectional Specification Fixed Capacitors for Power Supply EMI Suppression

GB/T 3667.1-2016 IEC 60252-1:2013 AC Motor Capacitors - Part 1: General - Performance, Testing and Rating - Safety Requirements - Installation and Operation Guidelines

GB/T 18489-2008 IEC 61048:2006 Capacitors for Tubular Fluorescent Lamps and Other Discharge Lamps - General Requirements and Safety Requirements

GB/T 4787-2010 IEC 62146-1:2016 Voltage Sharing Capacitors for High Voltage AC Circuit Breakers

JB/T 8168-1999 Pulse Capacitors and DC Capacitors

JB/T 7112-2000 Assembled High Voltage Shunt Capacitors

GB/T 17886.1-1999 IEC 60931-1:1996 Non self healing Shunt Capacitors for AC Power Systems with Nominal Voltages up to and including 1kV Part 1: General - Performance, Testing and Rating - Safety Requirements - Installation and Operation Guidelines

GB/T 11024.1-2019 IEC 60871-1:2014 Shunt Capacitors for AC Power Systems with Nominal Voltages above 1000V Part 1: General

GB/T 6115.1-2008 IEC 60143-1:2015 Series Capacitors for Power Systems Part 1: General

GB/T 3984.1-2004 IEC 60110-1:1998 Power Capacitors for Induction Heating Equipment Part 1: General

GB/T 12747.1-2017 IEC 60831-1:2014 Self healing Shunt Capacitors for AC Power Systems with Nominal Voltages up to and including 1000V Part 1: General Performance, Testing and Rating Safety Requirements Installation and Operation Guidelines

GB/T 3667.1-2016 IEC 60252-1:2010+AMD1:2013 AC Motor Capacitors - Part 1: General - Performance, Testing and Rating - Safety Requirements - Installation and Operation Guidelines

GB/T 17702-2013 IEC 61071:2017 Power Electronic Capacitors

GB/T 9324-1996 Fixed Capacitors for Electronic Equipment Part 10: Sectional Specification: Multilayer Chip Ceramic Capacitors

QC/T 741-2014 Automobile supercapacitor, etc.