UL 1973：2022 major modifications
UL 1973：2022 major modifications,
UL 1973,
▍What is TISI Certification?
TISI is short for Thai Industrial Standards Institute, affiliating to Thailand Industry Department. TISI is responsible for formulating the domestic standards as well as participating in international standards formulation and supervising the products and qualified assessment procedure to ensure the standard compliance and recognition. TISI is a governmental authorized regulatory organization for compulsory certification in Thailand. It is also responsible for formation and management of standards, lab approval, personnel training and product registration. It is noted that there is no non-governmental compulsory certification body in Thailand.
There is voluntary and compulsory certification in Thailand. TISI logos (see Figures 1 and 2) are allowed to use when products meet the standards. For products that have not yet been standardized, TISI also implements product registration as a temporary means of certification.
▍Compulsory Certification Scope
The compulsory certification covers 107 categories, 10 fields, including: electrical equipment, accessories, medical equipment, construction materials, consumer goods, vehicles, PVC pipes, LPG gas containers and agricultural products. Products beyond this scope are fall within the voluntary certification scope. Battery is compulsory certification product in TISI certification.
Applied standard: TIS 2217-2548 (2005)
Applied batteries：Secondary cells and batteries(containing alkaline or other non-acid electrolytes – safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications)
License issuance authority: Thai Industrial Standards Institute
▍Why MCM?
● MCM cooperates with factory audit organizations, laboratory and TISI directly, capable to provide best certification solution for clients.
● MCM possesses 10 years abundant experience in battery industry, capable to provide professional technical support.
● MCM provides one-stop bundle service to help clients enter into multiple markets (not only Thailand included) successfully with simple procedure.
UL 1973：2022 was published on 25th February. This version is based on two suggestion draft issued in May and October of 2021. The modified standard expands its range, including vehicle assistant energy system (e.g. illumination and communication).Append 7.7 Transformer: transformer for battery system shall be certificated under UL 1562 and UL 1310 or relevant standards. Low voltage can be certificated under 26.6.Update 7.9: Protective Circuits and Control: battery system shall provide switch or breaker, the minimum of which is required to be 60V instead of 50V. Extra requirement for instruction for overcurrent fuse.
Append 18 Overload Under Discharge: Evaluate battery system ability with overload under discharge. There are two conditions for the test: first is in overload under discharge in which current is higher than rated maximum discharging current but lower than current of BMS overcurrent protection; the second is higher than BMS over current protection but lower than level 1 protection current.
