Battery UL certification

Introduction

Batteries often have to enter UL certification before entering the US market. Although UL certification is voluntary, the US Customs releases products with the "ul" mark. Without this mark, complicated inspection procedures are required. And when a safety incident occurs, the Fire Product Safety Committee (CPSC) will also use UL standards as the basis for judgment. Therefore, in the United States, many sellers refuse to sell products without the "UL" mark in order to avoid trouble. As a component of electrical products enters the United States, batteries require UL certification.

Product Range

Lithium batteries (groups), spare batteries (groups), household and commercial batteries (groups)

standard test

UL1642 lithium battery (group) standard

UL2054 household and commercial batteries (group)

Lithium battery UL certification test items

1. Test item: short circuit test (BE-1000A or BE-1000W)

  Experimental conditions: Under the condition of full charge, use wires less than 100 milliohms to short-circuit the positive and negative poles of the battery at room temperature and 60℃±2℃.

  Experimental requirements: the battery does not explode or fire

  Battery test response: The battery did not explode or catch fire. There is electrolyte leakage.

2. Test item: overcharge test

  Experimental conditions: When the battery is fully charged, the battery is charged with a constant current and voltage of 3C, 10V, and when the current reaches 100mA, it is switched to constant voltage charging       &nbsp ;          to 48 hours.

  Experimental requirements: The battery does not explode or fire.

  The battery test reaction: the battery drum, there is liquid leakage. But there was no explosion and no fire.

3. Test item: extrusion test (BE-6045 battery extrusion tester)

  Experimental conditions: Under the condition of full power, a force of 13kN is applied to the two pistons with a diameter of 32mm on the side of the battery until the pressure on the piston reaches 17.2MP.

  Experimental requirements: The battery does not catch fire or explode.

  The battery test reaction: the battery is seriously deformed, the battery temperature rises, the highest temperature reaches 147 ℃, the battery has no explosion, no fire, and electrolyte leakage.

4. Test item: thermal shock test (BE-101 series thermal shock test box)

  Experimental conditions: Under the condition of full power, the temperature in the high temperature box will rise 5℃/min, and the temperature will reach 150℃ and leave it for 10 minutes

  Experimental requirements: the battery does not explode or fire

  Battery test reaction: A total of 15 batteries (10Ah) 10, (7.5Ah) 5, no battery reaction. According to the test engineer, this test is very difficult for many manufacturers to test whether it is a small capacity or a large capacity. Pass, the experiment is dangerous.

5. Test item: Impact test (BE-5066 battery impact testing machine)

  Experimental conditions: Under the condition of full power, a steel rod with a diameter of 15.8mm is placed on the battery. At a distance of 61cm from the battery, an object weighing 9.1kg falls freely on the steel rod.

  Experimental requirements: no explosion, no fire

  Battery experiment reaction: the battery deformed, the battery plane became concave, and the battery temperature began to rise. The temperature of two of the 15 batteries reached 124°C, but the battery did not explode or catch fire. The temperature of other batteries ranges from 35 to 82°C.