1. Choosing a lithium-ion battery when purchasing an electric vehicle
Many passenger vehicles today use ternary lithium-ion batteries, specifically the 18650 model, constructed using different series and modules to create power lithium-ion batteries with varying voltage levels and capacities. The energy output varies depending on the vehicle model, ranging from 40 kWh to higher capacity batteries. This is because ternary lithium-ion batteries have a higher energy density than lithium iron phosphate batteries, which is to better meet national design standards. Currently, the energy density for passenger vehicles is 120 Wh/g, a requirement that most electric vehicles meet. Batteries are among the most expensive components in a vehicle, so many factors are considered in their design. Many manufacturers design power lithium batteries using two methods: one with a heating mode and one without. Heated models are naturally more expensive, catering to customers at different price points. However, Li Peng suggests that if you're considering buying an electric vehicle, don't skimp on the cost; heated power lithium batteries offer excellent value, and you'll appreciate their usefulness in winter.
2. Avoid overcharging and over-discharging lithium-ion batteries during winter.
We all know that lithium-ion batteries achieve the charging and discharging process through chemical reactions. Temperature has a significant impact on these chemical reactions, so it's reasonable for battery capacity to decrease in winter. Therefore, when driving electric vehicles in winter, it's crucial to avoid over-discharging the lithium-ion battery. Charge it when the charge drops to 30% or 20%, and don't let it completely drain. Over-discharging can cause air bubbles to form inside the battery, which is why batteries sometimes swell.
3. Fire safety awareness must be high when charging in winter.
When charging electric vehicles in winter, it's essential to check the charging equipment. Currently, there are generally three charging modes: 30kW fast charging stations, 7kW slow charging stations, and the simplified Mode 2 charging station with a control and guidance device. Because fast charging stations are relatively expensive, their availability is far from meeting our needs, so many people avoid using them due to proximity. While there are more slow charging stations than fast charging stations, the number is still far from sufficient. So, the question arises: aside from centralized electric vehicle rentals, manufacturers build some charging stations. For individual consumers, purchasing an electric vehicle is likely primarily for its 220V household charging capability. Many choose Mode 2 charging because this device is simple to operate, inexpensive, small, and portable. Many private car owners use these charging stations, which involves the issue of individual wiring. If your outlets are insufficient, some people may attempt to connect wires themselves. In this case, you must be clear about the power rating and current of your charging station, and whether your wire gauge is sufficient for such a high current to operate for an extended period. If it is insufficient, there is a risk of the wires melting. Never attempt to connect wires yourself; always consult a professional technician before doing so. Many fires, besides those caused by lithium-ion batteries themselves, are caused by short circuits in the electrical circuit. Therefore, we must be especially careful when charging.
