UL certification
1 Introduction
UL is a shorthand for Underwriter Laboratories Inc. The UL Safety Laboratory is the most authoritative in the United States and the largest private institution in the world for safety testing and identification. It is an independent, profitable, professional organization that tests for public safety. UL certification is a non-mandatory certification in the United States, primarily for the detection and certification of product safety performance. The scope of certification does not include the EMC (electromagnetic compatibility) characteristics of the product.
2. Application process
3. Certification mark
 
Lithium battery UL certification
UL1642 is the standard for lithium battery safety introduced by the American Safety Testing Laboratory Company (also known as UL Company, Underwriters Laboratories Inc.) in October 1985. It is the most widely certified evaluation of lithium batteries in the world. The authoritative standard for battery safety and reliability. Mainly for cells.
The main test items of UL1642 include room temperature short circuit test, 55 degree short circuit test, over charge test, extrusion test, heavy impact test, mechanical impact test, vibration test, hot box test, temperature shock test, high altitude simulation test, ejection test, etc. .
UL2054 is mainly for lithium battery packs or lithium battery packs (batterypack). Suitable for primary (non-chargeable) and secondary (rechargeable) batteries used as power sources in products. These cells can be composed of a single electrochemical cell or two or more lithium ion cells that convert chemical energy into electrical energy by chemical reaction in parallel or in series.
UL2054‘s test items mainly include electrical test (short circuit test, overcharge test, abuse overcharge test, over discharge test, limited power source test), mechanical test (extrusion test, impact test, acceleration test, vibration test) battery case Test, drop impact test, 250N static test, mold pressure release test, fire bake test, projectile test, environmental test, high temperature test, temperature cycle test, etc.
UL is mainly divided into three types of column names: UL column name tag, C-UL column name tag, C-ULUS column name tag, mainly based on their differentiation for different national markets.
For example, UL listing marks are currently the most commonly used. This type of mark is commonly found in the following categories: appliances, calculators, stoves and heaters, fuses, power strips, smoke and carbon monoxide detectors, fire extinguishers and automatics. Sprinkler systems, personal flotation devices such as life jackets and lifebuoys, bulletproof glass and thousands of other products.
C-UL listing mark for products sold on the Canadian market. Such markings can be seen on the following types of equipment: electrical and calculator equipment, vending machines, home burglar alarm systems, lighting fixtures, and many other types of products.
The C-ULUS listing mark meets both US requirements and Canadian requirements.
UL‘s certificate report has no expiration date, and it is maintained according to the factory inspection and certificate maintenance fee. If the factory is inspected one season, it needs to have a factory record.