As the development of power tools tends to be more portable and lightweight, more and more power tools will use batteries as a power source. The safety of batteries, especially lithium-ion batteries, has also received wider attention in the market. On the one hand, the high energy density of lithium batteries can greatly improve the performance of products; on the other hand, if the design and manufacture of lithium batteries are defective, or they are used improperly, it will cause a fire or even an explosion. Therefore, it is more important than ever to fully understand and master the safety standards for using battery-powered products in order to protect people's lives and property, and reduce the risk of loss of recycled products and brand damage to manufacturers.

In response to the development trend of power tools, manufacturers have also accelerated the pace of product standard compliance. The UL 2595 standard issued by UL, which puts forward stricter requirements for the safety of battery power supply.

UL 2595 2nd Edition: 2015, General Requirements for Battery-Powered Appliances

UL 2595 Product Range

① Battery-operated appliances: with removable, integrated and detachable battery packs. Maximum rated voltage 75V d.c.;

② The implementation of this standard must be carried out in conjunction with the end product standard evaluation, and this standard cannot be used independently for product evaluation;

③ If the battery pack in the appliance is charged by a non-isolated charger, it needs to meet the requirements for protection against electric shock;

④ In assessing the fire risk of removable battery packs, these battery packs have been considered as an unregulated energy source and have been assessed in this standard. Removable battery packs evaluated under this standard are therefore considered to have the same effective fire protection as the final product standard.

⑤ Since the use is different from other products, the battery pack only needs to meet UL 2595, and does not need to meet other standards such as UL 2054;

⑥ UL 2595 does not apply to the safety requirements of battery chargers;

⑦ UL 2595 does not apply to appliances with universal batteries installed by the user;

⑧ UL 2595 does not consider the effects of special applications, such as medical devices or devices used in special environments;

⑨ UL 2595 does not assess its suitability for product categories other than electrical appliances;

⑩ UL 2595 does not apply to appliances containing lithium metal batteries, and lithium ion batteries are not lithium metal batteries.

UL 2595 requires critical components to comply with

① Lithium-ion batteries must meet UL 62133 or CAN/CSA E62133;

② The battery pack is not required to meet UL 2054;

③ PTC or NTC, UL 1434;

④ External charger, UL 1012 or UL 1310 or UL 6950-1;

⑤ Optocoupler, UL 157;

⑥ Relay, UL 508;

⑦ Labeling system, UL 969;

⑧ Others, the requirements of the end product for the device.

UL 2595 standard product test items

① Durability label durability;

② Normal Charging of Lithium-ion Systems

③ Lithium-ion charging systems Lithium-ion charging system-abnormal operation test

④ Lithium-ion battery short circuit Lithium-ion battery short circuit-abnormal operation test

⑤ Vibration for Lithium-Ion Batteries

⑥ Lithium-Ion Enclosure Pressure Test Lithium-Ion Enclosure Pressure Test

⑦ Mechanical Strength

⑧ Construction

⑨Supply Connection and External Flexible Cords

⑩ Creepage Distances, Clearances and Distances Through Insulation

⑪Resistance to Heat and Fire

⑫ USB port low power verification