Detailed Annotation of UL 9540A,
UL 9540A,

▍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.

With the rapid increase in the demand for energy storage batteries, the shipment volume has increased significantly, and a large number of related enterprises have entered the energy storage market. In order to improve the image and quality of their products for a strong product competitiveness, and meet the needs of various countries or regions, more and more enterprises began to test as per UL 9540A. To let you better understand this standard, the following is a simple summary for the standard requirements.
The purpose of cell testing is to collect the basic parameters of cell thermal runaway (such as temperature, gas composition, etc.) and determine the method of thermal runaway;
The process of cell testing: The cell is pretreated to charge and discharge in two cycles according to the manufacturer’s regulations; The cell is placed in a sealed gas collection tank, which is filled with nitrogen; The cell triggers thermal runaway, with methods including heating, acupuncture, overcharge, etc.; After the end of thermal runaway of the cell, the gas in the tank is extracted for gas analysis; Measure explosion limit data according to the composition of gas group information, get the data of heat release rate and explosion pressure.