Electric vehicles and light electric motorcycles are more and more popular because of their low energy consumption, green environmental protection and other advantages, and have become a major direction of future automobile development. As the heart of the power of electric vehicles, the safety performance of the battery has also received more and more attention. At present, there are many power battery safety standards for electric vehicles at home and abroad, such as UL2580, ISO12405-1, ISO12405-2, etc., as well as domestic automobile industry standard QC743-2006, etc. These standards have made corresponding requirements for the safety of battery cells, battery modules, battery charging and discharging systems, etc. This paper mainly takes the power battery UL2580 certification as an example to briefly introduce the requirements for the power battery.
UL issued a draft of UL2580, a safety standard for automotive power batteries, in 2009, and released the official version of UL2580 in October 2011. At the same time, UL2580 passed the ANSI (American National Standards Institute) review and was officially adopted as the American national standard.
The UL2580 standard covers internal energy storage devices for electric vehicles such as battery cells, battery modules, and battery pack systems. The standard evaluates the ability of the battery to withstand simulated abuse and to protect personnel in the event of a risk of abuse. At the same time, the standard evaluates the reliability of charging and discharging parameters of batteries and battery modules within the operating temperature range specified by the manufacturer. However, the standard does not consider the interaction between other control systems and batteries in electric vehicles.
The power battery used in light electric vehicles (such as electric bicycles, electric wheelchairs, electric scooters, etc.) has separate requirements in the UL2271 standard, so it is not within the scope of the UL2580 standard.
The test items in the power battery UL2580 certification are all for the test of power battery packs and battery modules for electric vehicles, and there are no test items for single cells. However, the standard also specifically states that the cells must meet the corresponding battery standards. For example, lithium ion cells must pass UL1642, and nickel system cells must meet the requirements of cell test in UL2054.
The safety standard UL2580 standard test items for electric vehicle batteries are as follows:
power battery UL2580 certification-Electrical testing
• Overcharge overcharge
• Short Circuit
• Overdischarge Protection over-release protection
• Temperature temperature rise
• Imbalanced Charging unbalanced charging
• Dielectric Voltage Withstand withstand voltage
• Isolation Resistance insulation impedance
• Continuity earth continuity
•Failure of Cooling/Thermal Stability System
Power battery UL2580 certification-Mechanical testing
• Rotation flip
• Vibration Endurance vibration
• Shock mechanical shock
• Drop Drop
• Crush Extrusion
Power battery UL2580 certification environmental testing
• Thermal Cycling temperature shock
• Salt Spray
• Immersion flooding
• External Fire Exposure internal fire
•Internal Fire Exposure
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