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In order to reveal the nail penetration safety characteristics of power lithium-ion batteries for electric vehicles, an experimental platform was built for 18650/21700 power lithium-ion batteries. With the help of the classical internal short circuit model based on the electronic flow direction of the internal and external circuits of the batteries, the effects of associated influencing factors including different State of Charge (SOC), nail speed, nail diameter and battery size on the safety characteristics of battery nail penetration were explored. The results show that the higher the state of charge, the faster the nail speed and the larger the nail diameter and battery size are, the higher the risk of thermal runaway of battery nail penetration is. When the SOC of 18650/21700 power lithium-ion battery is in the range of 40% and 20% respectively, the battery has good nail penetration safety.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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