Overview
IEC 62813:2015 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies test methods for the electrical characteristics of lithium ion capacitors (LIC) used in electric and electronic equipment. This standard establishes uniform procedures to measure crucial parameters such as capacitance, internal resistance, discharge accumulated electric energy, and voltage maintenance rate. By adhering to these methods, manufacturers, testers, and designers can ensure reliable performance, quality evaluation, and comparability of LIC components across different products and industries.
Key Topics
The IEC 62813:2015 standard focuses on the following essential electrical characteristics of lithium ion capacitors:
- Capacitance: Quantifies the LIC's ability to store electrical charge, a fundamental factor affecting energy storage capacity.
- Internal Resistance: Represents the equivalent series resistance within the LIC, impacting efficiency and heat generation during operation.
- Discharge Accumulated Electric Energy: Measures the total energy a capacitor delivers from the start of discharge until it reaches a specified lower limit voltage.
- Voltage Maintenance Rate: Assesses the LIC’s ability to maintain voltage over time under defined test conditions, revealing voltage stability performance.
These parameters are measured under standardized atmospheric and pre-conditioning environments defined in the document to guarantee consistency and reproducibility.
Test Procedures
Specific test circuits and voltage profiles are described to accurately capture each electrical characteristic:
- Basic circuits for capacitance, internal resistance, and discharge energy measurements.
- Voltage profiles for discharging tests to determine voltage maintenance.
- Standardized calculation formulas for deriving capacitance, internal resistance, and voltage maintenance rate from measured data.
The document includes informative annexes covering endurance testing at high temperature, error propagation analysis for measurement currents, and procedures to define appropriate measuring currents for LICs with uncertain internal resistance.
Applications
IEC 62813:2015 is highly applicable to industries and areas involving:
- Electric Vehicles (EVs): Ensuring reliability and performance of LICs within energy storage and power delivery systems.
- Consumer Electronics: Standardized testing for LIC components used in smartphones, cameras, and wearables.
- Renewable Energy Systems: Energy buffering and management devices employing LICs for efficiency and longevity.
- Industrial Electronics: High-reliability capacitance components in control, automation, and power electronics.
By implementing these test methods, manufacturers can improve product quality, meet regulatory requirements, and facilitate interoperability in supply chains. End users gain confidence in the durability and electrical performance of lithium ion capacitors.
Related Standards
For comprehensive testing and quality assurance, IEC 62813:2015 is used in conjunction with several other standards:
- IEC 60068-1:2013 – Environmental Testing: General and Guidance – Prescribes environmental conditions relevant for testing electric components including LICs.
- IEC 62576:2009 – Capacitors for use in electronic equipment – Defines terms and definitions related to capacitors, referenced within IEC 62813 terminology.
- Other IEC standards on capacitors and energy storage devices to ensure integration within broader electrical and electronic systems.
Keywords: IEC 62813:2015, lithium ion capacitors, LIC test methods, electrical characteristics test, capacitance measurement, internal resistance testing, discharge energy measurement, voltage maintenance rate, electric and electronic equipment standards, IEC standards, capacitor testing protocols.