With the development of electric tools becoming more portable, more and more electric tools will use batteries as power sources. The safety of batteries, especially lithium ion batteries, has attracted more attention in the market. On the one hand, the high energy density of lithium battery can greatly improve the performance of products; However, on the other hand, if the lithium battery is defective in design and manufacture, or improperly used, it will cause fire or even explosion. Therefore, in order to protect people's lives and property, reduce the risk of loss of recycled products and brand damage suffered by manufacturers, it is more important than ever to fully understand and master the safety standards for battery powered products.
In view of the development trend of electric tools, manufacturers have also accelerated the pace of product standard compliance. The UL 2595 standard issued by UL puts forward stricter requirements on the safety of battery power supply.
UL 2595 Product Range:
Battery driven appliances: with removable, integrated and separable battery packs. Maximum rated voltage 75V d.c;
The implementation of this standard must be coordinated with the evaluation of terminal product standards, and it is not allowed to independently use this standard for product evaluation;
If the battery pack in the appliance is charged by a non isolated charger, it shall meet the requirements for protection against electric shock;
When evaluating the fire risk of removable battery packs, it has been considered that these battery packs are unregulated energy sources and have been evaluated in this standard. The removable battery pack evaluated according to this standard is therefore considered to have the same effective fire protection as the final product standard.
Because the use is different from other products, the battery pack only needs to meet UL 2595, not other standards such as UL 2054;
UL 2595 is not applicable to the safety requirements of battery chargers;
UL 2595 is not applicable to appliances with universal batteries installed by users;
UL 2595 does not consider the impact of special applications, such as medical appliances or appliances used in special environments;
UL 2595 did not assess its suitability for product categories other than appliances;
UL 2595 is not applicable to appliances containing lithium metal batteries. Lithium ion batteries are not lithium metal batteries.
Introduction to main technical requirements and test items of the standard:
1. Equipment label requirements:
Clause 6 Markings
6.1 In addition to the safety warnings required in accordance with the applicable end-product standard, abattery-operated appliance shall comply with the applicable marking requirements in Clauses 6.2–6.8.
For example: voltage or voltage range (V), DC or DC symbol (), warning, etc.
Examples of warning terms:
“WARNING–To reduce the risk of injury, user must read instruction manual”
“CAUTION–Do not stare at operating lamp.”
“Do not exposed to rain” or “Indoor use”
2. Main test contents:
10 Normal Charging of Lithium ion Systems
When charging the lithium battery under normal conditions, the specified working area for charging the battery shall not be exceeded. During normal charging, the voltage, current and temperature of a single battery must be monitored.
11 Abnormal Operation
11.7 Lithium ion charging systems
Charge the lithium battery under abnormal conditions. Please refer to the standard for detailed determination conditions of the test. During abnormal charging, the voltage, current and temperature of a single battery must be monitored.
Abnormal conditions: equipment charging protection circuit fails, battery charging protection circuit fails, and equipment and battery charging protection circuit fail at the same time.
11.8 Lithium ion battery short circuit
The main discharge connection is short circuited under extreme imbalance. Please refer to the standard for detailed determination conditions of the test. In case of short circuit, the voltage, current and temperature of single battery must be monitored.
Conditions of extreme imbalance: the equipment and battery discharge protection circuit fail at the same time, and the equipment is in the maximum operating state.
13 Vibration for Lithium Ion Batteries
14 Lithium Ion Enclosure Pressure Test
15 Mechanical Strength
Including drop test and ball impact test.
20Creepage Distances, Clearances and Distances Through Insulation
21Resistance to Heat and Fire
Glow wire test and ball pressure test are included.
Tel：+86 755-23147379
Email：info@standards-test.com