Key Advantages of TUNKIA EV Charger Tester Solution

In our previous article, we explored the importance of EV charger metrological testing. Now, let's dive into the key advantages and technical strengths of TUNKIA's portable EV charger testers. These testers stand out with high automation, broad compatibility, resistive load support, easy traceability, two energy test methods, GPS clock integration, and temperature measurement capabilities.

    Read Why is EV Chargers Metrological Testing Necessary?

1. High Automation for Versatile Applications

TUNKIA EV charger testers enable fully automated testing, ensuring higher efficiency, reduced complexity, and reliable accuracy. They support appearance inspection, working error analysis, and clock accuracy testing.

With automatic reporting features, users can easily customize reports to meet specific requirements. This makes the testers ideal for laboratories, production lines, installation acceptance, and maintenance, serving metrology institutes, power companies, charger manufacturers, and operators alike.

TK4850E DC EV Charging Station Testing Device Operation Demo:

2. Wide Compatibility for Various Chargers

TUNKIA EV charger testers support GB/T, CCS1, CCS2, CHAdeMO, IEC Type 2, and IEC Type 1, allowing flexible configuration to test various charging station interfaces and meet diverse global testing requirements.

3. Resistive Load and EV as Load

TUNKIA's on-site EV charger testers support both EV and resistive loads. Using a resistive load (DC up to 240kW, AC 1PH 9kW, 3PH 45kW) offers key advantages comparing to using EVs as load:

    • Enables testing even when an EV battery is full.

    • Prevents battery damage from frequent testing.

    • Reduces costs by eliminating the need for multiple EVs.

More importantly, using resistive load enable the users to set different testing points that can comply with OIML G22 international guide (world unique guide for EVSE metrological testing-OIML G22, majorly for type approval). Up to now, no countries, except for China, have the national regulations/standards for EVSE.

TD1320 Portable Tester for DC EV Chargers Operation Demo:

4. Tester Traceability with Complete Product System

Designed with dedicated calibration terminals and with self-calibration interfaces on the EV charger testers, clients can easily make traceability to the higher standard.

Tunkia offers the most complete product system of EV charger testing from on-site to lab, and from metrological testing to traceable calibration. The traceability solution for portable testers:

    • TD1320 Portable Tester for DC EV Chargers Traceability Solution

    TD1545 DC Energy Standard +TK4960 DC Charging-Power Calibration Adapter

    TD1548 DC Energy Standard

    • TD1330Portable Tester for AC EV Chargers Traceability Solution

    TD4550 AC Standard Power Source +TK4965 AC Charging-Power Calibration Adapter

TUNKIA offers a full range of EV charger testing solutions:

• Portable Testers for on-site testing: TK4850, TK4860, TD1320, TD1330, TK4830.

• Integrated Testing Vehicles for field testing: TK403A, TK408A.

• Laboratory Type Evaluation System: TK404A for in-depth analysis.

5. Two Energy Testing Method for Accurate Testing

The Tunkia EV charger testers integrate two energy measurement methods: the pulse method and the accumulative energy method. The user can choose the method needed to test the EV charger according to the local regulations or practical need.

In China, the accumulative energy method is prioritized for direct measurement at the connector, as it offers high accuracy, and is compatible with chargers without internal energy meters. In contrast, the pulse method relies on the charger’s internal energy meter pulse signals, making it susceptible to interface compatibility issues, electromagnetic interference, and device-specific errors.

6. GPS Clock Calibration Ensures Accurate Timekeeping

Electricity pricing varies by time of day in some countries, with lower rates at night to encourage usage. To accommodate this, EV chargers must have accurate timekeeping. Tunkia portable EV testers include a GPS clock function for automatic time calibration, ensuring the charger’s time is always correct.

7. Temperature Measurement Function Corrects Operational Errors

Temperature measurement is crucial in our metrology tests, as EV charger specifications vary with temperature, as outlined in the China Metrology Verification Standard (JJG1149-2022). The specification tolerance of the EV charger needed to be compensated at different temperature point. TUNKIA Portable EV Charger Testers include built-in temperature and humidity measurement functions, automatically syncing these readings, reducing the need for additional equipment during calibration.