The Ministry of Construction has just issued Circular No. 12. 2026. TT-BXD and Circular No. 13. 2026. TT-BXD, corresponding to the National Technical Regulation QCVN 30:2026/BXD on electric motors and QCVN 31:2026/BXD on batteries.
The new standards apply to the entire process of production, assembly, import as well as inspection, testing and certification of electric vehicle engines and batteries.
The subjects of application include domestic manufacturing enterprises, import units and organizations related to quality accreditation activities.
For electric motors, the standard sets out a series of strict technical requirements. The engine must ensure that the structure is in accordance with the registered design, without signs of damage such as cracks, rust, and the details are installed firmly.
Important parameters such as nominal voltage, nominal power must be clearly recorded, cannot be erased and are easy to observe after complete installation.
Notably, each engine must have an engraved or embossed identification number, which must not be modified. The accompanying electric controller must also fully display information about the brand, type code and voltage used.
In terms of performance, the regulation stipulates that the error between actual and registered parameters must not exceed ±5%. Engine performance must be at least 75% at nominal torque and not less than 70% at different load modes.
In addition, the engine must meet the requirements of insulation, temperature control, overload resistance and protection from external impacts. The electric controller must also have a protective mechanism when voltage drop or overflow occurs.
For batteries, standard QCVN 31:2026/BXD specifically stipulates both electrical and safety characteristics. Batteries must be manufactured in accordance with technical documents, with clear positive and negative symbols, and the case must not be deformed or cracked. Parameters such as nominal voltage, nominal capacity must be fully displayed, difficult to erase.
The standard applies to many common types of batteries such as acid lead, nickel metal hydride and Lithium-ion. In which, the actual voltage must not be lower than the nominal value and not exceed 15%. The actual capacity must be at least 90% for acid lead batteries and 100% for modern batteries.
Safety requirements are tightened, especially in tests such as overloading, overpowering, vibration, short circuits or soaking in water. In all cases, the battery must not leak, burn, explode or break. This is important content to limit risks during actual use.
In addition, the standard also provides specific instructions on the charging process, especially for acid lead batteries in cases without the manufacturer's charger.
Notably, engine and battery products that have submitted dossiers for inspection, testing or certification before October 9, 2026 are still being processed according to old regulations. Previously issued test reports are still valid for quality certification.
The synchronous promulgation of two new standards is expected to improve the quality of core components of electric vehicles, while creating a clear legal corridor for businesses. In the context of increasing demand for green vehicles, technical standards play an important role in ensuring safety and promoting sustainable market development.
