The UL2272 standard components require that the entire vehicle shell (UL746C, UL746B), charger (Class II power supply UL1310, non Class II power supply UL1012, UL60950-1), motor (above 60V DC voltage meets UL1004-1, below 60V DC voltage can meet UL1004-1 or this standard requirements), circuit and terminal (UL2251, etc.), protective circuit (UL991, UL1998, etc.), and battery pack (UL2271) should all meet the specific standard requirements for accessories proposed in UL2272. UL2272 certified electrical performance test 1. overcharging (single circuit board fault); 2. Short circuit (single circuit board fault); 3 Overdischarge (single fault of circuit board); 4. Temperature test (temperature meets the temperature requirements of components and contactable surfaces in Tables 26.1 and 26.2); 5. Unbalanced charging (one cell is fully discharged, and other cells are discharged to 50% of their capacity, charged with a specified charger); 6. Withstand voltage test (voltage greater than 6OV is required for this test); 7. Insulation resistance test (voltage greater than 60N is required for this test) UL2272 certified mechanical performance test 1, vibration test. Perform vibration testing on the fully charged balance car according to the table below. Each direction vibrates for 21 hours. When testing two samples simultaneously, each direction vibrates for 15 hours. When vibrating three samples simultaneously, each direction vibrates for 12 hours. After the test, if the balanced vehicle can still operate, it should undergo at least one charging and discharging cycle. After vibration, there is no risk of fire, explosion, shell rupture, or electric shock in the balanced vehicle. 2. The impact test is conducted on a fully charged balance vehicle in the following table, in six directions, with three impacts in each direction. After the test, if the balanced vehicle can still operate, it should undergo at least one charging and discharging cycle. After impact, the balance vehicle has no fire, explosion, shell rupture, or electric shock hazard. 3. Squeeze test This test mainly examines the safety of the balance vehicle after being subjected to external compression
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