With the rapid development of the new energy vehicle industry, AC charging piles, as an essential component of the infrastructure, have product quality and performance that directly affect users’ charging safety and experience. In the R&D, production, and quality‑inspection stages of charging piles, how to achieve efficient and accurate functional verification and performance testing has become a key focus for the industry. ZHONGJIA EQUIPMENT, grounded in industry needs and addressing the pain points of AC charging pile testing scenarios, offers a series of specialized testing solutions.

I. Industry Challenges Faced in Testing AC Charging Piles

In the actual production processes of charging‑station manufacturers, traditional testing methods often encounter multiple challenges. Manual inspection is inefficient and struggles to meet the demands of full‑batch inspections, while test accuracy is susceptible to external factors such as power‑supply fluctuations and variations in the resistance of connecting leads, leading to inconsistent results. Moreover, test data are difficult to store systematically and trace back, which undermines quality management throughout the product’s entire lifecycle. For charging‑station products that must simultaneously comply with multiple standards—including Chinese, European, and U.S. specifications—the requirements for test‑equipment compatibility are even more stringent.

These challenges not only increase companies’ labor costs but also pose potential risks to the quality of products at the point of shipment. The industry urgently needs an integrated testing system that delivers automation, intelligence, and data traceability.

II. The Key Value of the Comprehensive Testing System

In response to the functional testing needs of AC charging piles, Zhongjia Testing has introduced the ZJ‑CDQ08 Charging Gun Comprehensive Test System and the ZJ‑CDQ01 AC Charging Gun Comprehensive Tester, both of which highlight the advantages of automated testing. These devices can simultaneously perform tests on a wide range of critical parameters, including open‑circuit, continuity, short‑circuit, wire‑sequence errors, main‑wire contact resistance, CP and CC resistances, electronic lock operation, inter‑wire insulation, inter‑wire dielectric strength, thermocouple wiring, and more, with a highly integrated test workflow.

Taking the ZJ‑CDQ08 as an example, this system supports functional testing of various AC and DC charging connectors, including Chinese national standards, European standards, U.S. standards, and Tesla. During testing, all parameters meet stringent accuracy requirements. For instance, the CP and CC resistance measurement range spans 1 to 5,000 Ω with an accuracy of 1%; the inter‑wire insulation test voltage is adjustable from DC 100 to 1,000 V, with a lower limit set between 1 MΩ and 1 GΩ, and accuracy maintained within ±5%. Each charging connector can be assigned a unique QR code, and test results are automatically saved and linked to the corresponding barcode, enabling closed-loop data management from production through inspection.

For rapid testing of single-phase AC charging guns, the ZJ‑CDQ01 offers a more compact, integrated solution. Featuring touch-screen control, this device combines multiple test functions—including insulation resistance, dielectric withstand voltage, continuity polarity, and CC/PE resistance—while allowing all test parameters to be stored and recalled directly. It provides audible and visual alarms as well as text prompts for abnormalities such as insulation faults, dielectric breakdown, continuity issues, or resistance out-of‑tolerance, effectively lowering the skill threshold for operators.

III. Comprehensive Testing of Pile Tips and Aging Verification Plan

In addition to testing charging guns, functional verification of the entire charging station is equally critical. Zhongjia Testing’s ZJ‑ZH8163 AC single‑phase charging gun and station comprehensive test system is specifically designed for the testing and validation of the conductive charging functions of charging guns and stations compliant with Chinese, European, and U.S. standards. The system enables one‑click testing of all functions, covering more than twenty test items—including dielectric strength, insulation resistance, emergency stop switches, CP and CC resistances, interoperability, overcurrent protection, undervoltage protection, overvoltage protection, and leakage current protection—and allows flexible configuration of test‑procedure parameters.

The system is equipped with an industrial PC and supports QR code scanning. Test results can be recorded, queried, and integrated with the MES system, enabling seamless connectivity of production data. The operating voltage is continuously adjustable within the ranges of single-phase AC 0–300 V and three-phase AC 0–420 V, while the load current can be set continuously from 1 to 32 A (up to 50 A for U.S. standards), making it compatible with charging stations across a wide range of power ratings.

During the aging‑test phase, conventional resistive loads suffer from high energy consumption and significant heat generation. The ZJ‑LH820C AC single‑phase and three‑phase charging‑pile aging test bench, launched by Zhongjia Testing, employs regenerative load technology to feed electrical energy back into the grid without pollution, enabling energy recovery and substantially reducing overall energy use while preventing ambient temperature rises from affecting test results. This equipment supports batch online testing across two sets of 20 workstations; its software automatically monitors the aging process, promptly disconnects power and triggers an alarm in case of faults or defective units, and automatically shorts faulty samples to ensure uninterrupted testing at other stations. Test data is automatically linked to product barcodes, stored, and exported as electronic reports, with seamless integration into MES systems—providing enterprises with an energy‑efficient, environmentally friendly, and intelligent aging‑test solution.

IV. Professional Support for Specific Performance Testing

In addition to routine functional testing, performance validation of charging stations under specific operating conditions is equally critical. Zhongjia Testing offers the ZJ‑AC240V64A three‑phase AC programmable load bank, which features built-in resistive loads and allows power adjustment across a range from 1 A to 64 A with a step resolution of 0.1 A. It can be configured in various combinations to simulate a wide array of power‑consumption profiles. The device employs alloy resistors as its core elements, delivering excellent heat dissipation, robust load‑carrying capacity, superior shock resistance, and high stability. It is capable of continuous operation for 24 hours, withstands a 5‑times over‑load for 5 seconds without damage, and endures a 1.2‑times overload for 30 minutes without degradation, thereby meeting the reliability requirements for full‑load testing of charging stations.

For CP‑signal testing of charging stations, the AC charging gun aging test cabinet can monitor in real time the frequency, voltage, and duty cycle (converted to protocol‑compliant current) of the CP signal. If any parameter fails to meet specifications, an audible alarm sounds and an indicator light flashes; at the same time, the CC signal is detected and the cable’s rated current is displayed. If the CC signal does not match or the resistance value is incorrect, an alarm is triggered. The device allows users to set a 24‑hour aging test duration and is suitable for aging tests of Type 2 and Type 3 charging guns compliant with Chinese, European, and U.S. standards. It supports the following standards: GB/T 18487.1‑2015, SAE J1772‑2017, IEC 62196‑1, IEC 62196‑2, IEC 62196‑3, and IEC 61851.

V. The Value of Data Traceability and System Integration

In the era of intelligent manufacturing, testing equipment must not only meet functional‑testing requirements but also possess robust data‑management and system‑integration capabilities. Zhongjia Testing’s test systems widely support QR‑code or barcode scanning, automatically associating test data with product identifiers to enable end-to‑end data traceability throughout the product lifecycle. Test results can be exported in EXCEL or TXT formats, facilitating subsequent data analysis and quality management.

In addition, the equipment is equipped with reserved communication interfaces, supporting multiple protocols such as RS485 and USB, enabling data upload to MES or ERP systems and seamless integration with the enterprise’s production management platform. This data‑driven quality‑control approach helps companies establish a comprehensive quality‑management system spanning R&D, manufacturing, and after-sales service, thereby enhancing product competitiveness.

VI. Multi-Standard Compatibility and Global Market Adaptation

As the new‑energy vehicle industry continues to globalize, charging‑station products must comply with the standards of various countries and regions. From the outset, Zhongjia Testing’s test equipment was designed with multi‑standard compatibility in mind, supporting numerous international and domestic standards—including China’s GB/T 18487.1‑2015, Europe’s IEC 62196‑2‑2016, and the U.S. SAE J1772‑2017—thus meeting the needs of companies seeking to export their products and expand into international markets.

This multi‑standard compatibility not only reduces enterprises’ equipment procurement costs but also enhances the flexibility of testing workflows, enabling a single set of equipment to meet the product‑testing requirements of diverse markets and providing robust support for companies’ global expansion strategies.

VII. Conclusion

The selection of testing equipment for AC charging stations directly impacts a company’s production efficiency, product quality, and market competitiveness. Positioned as a provider of automated, intelligent testing systems, Zhongjia Testing focuses on the research, development, and manufacturing of automated, smart testing equipment, offering comprehensive test solutions that cover multiple dimensions, including functional testing, safety compliance testing, durability testing, and performance validation.

By delivering differentiated value—such as high‑efficiency batch testing, multi‑standard compatibility, test‑data traceability, and energy efficiency and environmental sustainability—Zhongjia Testing’s solutions help EV charging‑pile manufacturers address key industry challenges, including low testing efficiency, high labor costs, and difficulties in data traceability, while enabling customers to achieve end‑to‑end data traceability and quality control throughout the product lifecycle. Against the backdrop of the continued growth of the new‑energy vehicle industry, specialized testing equipment will serve as a critical enabler for companies seeking to enhance product quality and strengthen their market competitiveness.