From May 1–5, 2026, the average daily charging volume of new energy vehicles on China's expressways reached 18.9863 million kWh, up 52.8% year on year and setting a new historical high. This data is directly linked to the highly reliable current and temperature sensing components used in new energy vehicles, exerting a substantive impact on manufacturers, export traders, and supply chain service providers of automotive-grade Hall current sensors and NTC temperature sensors, and is worthy of continued attention from practitioners in related niche sectors.

Event Overview

According to publicly available information, from May 1 to May 5, 2026 (during the Labor Day holiday), the average daily charging volume of new energy vehicles on expressways nationwide was 18.9863 million kWh, an increase of 52.8% compared with the same period last year and the highest level in history. This sustained high-load charging scenario continues to validate the reliability performance of domestically produced automotive-grade Hall current sensors and NTC temperature sensors under harsh operating conditions such as high temperatures, transient overloads, and long-term aging, accelerating their AEC-Q200 certification process. At the same time, overseas charging pile manufacturers and Tier 1 suppliers are intensively requesting quotations for domestic sensor models that are certified under the ISO/TS 16949 quality management system and support output characteristics across the wide temperature range of -40℃~125℃, with the goal of replacing imported components to optimize BOM costs.

Which Sub-sectors Are Affected

Direct Trading Companies

Driven by concentrated inquiries from overseas customers, domestic sensor exporters with AEC-Q200 certification potential, having passed ISO/TS 16949 audits, and offering products with a nominal operating temperature range covering -40℃~125℃ are facing short-term order opportunities. The impact is mainly reflected in export quotation response speed, the ability to deliver certification documents, and lead times for small-batch trial production deliveries.

Processing and Manufacturing Enterprises

For companies focused on the mass production of automotive-grade Hall current sensors and NTC temperature sensors, production line stability, inter-batch parameter consistency, and the completeness of high-temperature aging test data are becoming key focuses in overseas customer technical audits. The impact is reflected in more frequent customer factory inspections, increased demand for reviewing aging test reports, and higher requirements for traceability of temperature drift calibration records.

Supply Chain Service Enterprises

Third-party institutions providing services such as AEC-Q200 certification consulting, EMC/ESD testing outsourcing, and automotive-grade packaging subcontracting for sensor companies are seeing a phased increase in business inquiries. The impact is mainly reflected in tighter certification timeline estimates, increased pressure on test scheduling, and higher utilization rates of wide-temperature-range calibration equipment.

Channel Distribution Enterprises

Companies distributing components to overseas charging pile manufacturers or Tier 1 supplier systems need to update product compliance documentation in parallel. The impact is reflected in the localization of technical documentation (such as English versions of AEC-Q200 self-assessment forms), adjustments to the labeling format of temperature-range parameters, and stronger customer demand for immediate review of the completeness of PPAP document packages.

What Key Points Should Relevant Companies or Practitioners Watch, and How Should They Respond at Present

Pay Attention to the Disclosure Timing of Subsequent AEC-Q200 Certification Progress

At present, many domestic sensor manufacturers are in the middle to late stages of AEC-Q200 certification, but have not yet publicly disclosed certification information. Companies should proactively track announcements on the official websites of mainstream certification bodies (such as SGS, TÜV Rheinland, and UL) as well as quarterly industry association bulletins, so as to avoid misinterpreting “certification in progress” as “certified,” which could affect customer trust building.

Focus on Capacity and Lead Time Management for Models Covering the -40℃~125℃ Wide Temperature Range

Overseas inquiries are concentrated on products with clearly specified temperature-range requirements rather than entire product series. Companies should prioritize reviewing current inventory, work-in-progress quantities, and minimum order quantity (MOQ) flexibility for mass-produced models within this temperature range, so as to avoid losing orders due to shortages of key models despite sufficient stock of general-purpose models.

Differentiate Between Customer Technical Inquiries and Actual Purchasing Intent

Most current inquiries are still in the early-stage technical comparison phase and have not yet entered the mass procurement process. Companies should establish a tiered response mechanism: provide standardized technical white papers and certification progress statements for first-round inquiries; for second-round in-depth inquiries, match them with specific application cases (such as measured temperature drift curves of a certain DC fast-charging module), so as to avoid overcommitting on delivery milestones.

Prepare English Versions of ISO/TS 16949 System Documentation in Advance

Overseas customers generally require English versions of quality manuals, process flowcharts, and summaries of internal audit records. Based on existing Chinese system documentation, companies should prioritize translating core clauses and unifying terminology to ensure timely submission of documents during the technical audit stage and reduce audit delays caused by language conversion.

Editorial Viewpoint / Industry Observation

显然，这一数据点反映的并非一次性的季节性激增，而是国产车规级传感器在真实应用环境中验证压力的拐点。高速公路充电量52.8%的同比增长，构成了一场大规模、非受控的现场测试——它正在加速可靠性基准对比，并暴露出认证准备度方面的差距。当前，这一现象更像是国际技术接受度提升的信号，而非出口量立即激增的标志；实际订单放量仍取决于AEC-Q200认证结果和客户认证周期。之所以值得持续关注，是因为下游采用所依赖的已不只是性能参数本身，而是围绕温度、寿命和瞬态应力条件建立的可追溯、可审计的合规证据。

Conclusion

The charging volume data during this Labor Day holiday is not an isolated consumer-side indicator, but rather a technical validation milestone for domestically produced automotive-grade sensors moving into key links of the international supply chain. At present, it is more suitable to regard it as a “compliance capability stress test signal,” prompting relevant companies to focus resources on verifiable actions such as certification implementation, accumulation of measured data across temperature ranges, and internationalization of system documentation, rather than remaining only at the level of parameter benchmarking or market promotion. Viewing its significance rationally helps avoid strategic misjudgment and execution deviation.

Information Source Notes

Main source: an industry monitoring data bulletin released on May 5, 2026 (publishing entity not specified). Items requiring continued observation: the final list of companies passing AEC-Q200 certification, the implementation timing of the first batch of overseas volume orders, and the specific range of imported brand models being replaced.