GB/T 44993-2024 in English
VALIDOn-site testing instruments of off-board charger for electric vehicles
- Issued on:2024-12-31
- Implemented on:2025-07-01
- File Format:PDF
- Delivery:Within 1 day
$245.00
《GB/T 44993-2024电动汽车非车载充电机现场检测仪》由TC104（全国电工仪器仪表标准化技术委员会）归口，TC104SC2（全国电工仪器仪表标准化技术委员会电工和电磁量测量设备分会）执行，主管部门为中国机械工业联合会。
Introduction
1. Background of standard formulation and technological evolution
With the popularization of electric vehicles, off-board chargers are key supporting facilities, and their detection technology is becoming increasingly important. The formulation of GB/T44993-2024 aims to standardize the technical requirements and test methods of on-site detectors to ensure the safety and accuracy of charging facilities.
2. Comparison of standard frameworks
| Standard dimensions | GB/T44993-2024 | NB/T33001-2018 (reference standard) |
|---|---|---|
| Environmental conditions | Operating temperature: -25℃~55℃, humidity not exceeding 95% | NB/T33001-2018 does not specify specific requirements |
| Structure and mechanical properties | Protection level IP30, shock and vibration test requirements | Only mentions shell protection requirements |
| Electrical performance | Insulation resistance ≥ 10MΩ, dielectric strength test voltage is clear | Not specified in detail |
3. Technical requirements interpretation and application cases
Environmental conditions:The detector needs to adapt to harsh environments and ensure normal operation at low and high temperatures. For example, in low temperatures in winter, the device can still accurately measure the power error of the charger.
Structural and mechanical properties:The protection level IP30 requirement means that the device needs to be dustproof and waterproof, suitable for outdoor installation. Impact tests ensure that the device will not be damaged during transportation or accidental drops.
Measurement performance:The power error limit is ±0.2% (0.2 level), requiring the detector to have high-precision measurement capabilities. For example, in actual applications, the detector needs to be able to accurately measure the output power fluctuation of the charger.
4. Implementation suggestions
- Design stage: Ensure that the equipment meets the IP30 protection level and passes high temperature, low temperature and vibration tests.
- Manufacturing stage: Strictly perform insulation resistance and dielectric strength tests in accordance with standard requirements to ensure electrical safety.
- Detection process: Use high-precision standard tables for error calibration to ensure that the measurement results meet the requirements of level 0.2, level 0.1 or level 0.05.
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