Why battery range drops in winter

1. The battery range decrease level in winter

Depending on the characteristics of different battery types, when the ambient temperature drops below 0℃, lead-acid batteries typically experience a 20%-50% decrease in range, while lithium batteries experience a 10%-30% decrease. In extremely cold conditions (below -10℃), the decrease can even exceed 40%.

For example, an electric cargo tricycle that can travel 100 kilometers at 25℃might only have a range of 70-80 kilometers at around 0℃. For users requiring long-distance delivery, logistics, or commercial operations, this change necessitates advance planning.

2. Main reasons

• Low temperature reduces battery chemical activity

Electric vehicle batteries are essentially chemical energy storage devices. Whether lithium-ion or lead-acid, they rely on chemical reactions to generate electrical energy. When the temperature drops, the activity of the electrolyte decreases, ion movement slows, internal battery resistance increases, and energy release efficiency decreases. Although the energy in the battery doesn't disappear, some energy cannot be released quickly due to the low temperature environment. The overall efficiency of the battery also decreases.

At this point, users will see the battery drain faster, power decrease, and actual range decline.

• Reduced battery capacity

Low temperatures not only affect discharge efficiency but also reduce the battery's usable capacity. Taking lithium batteries as an example, if the capacity is approximately 100% at 25°C, about 90% at 10°C, about 80% at 0°C, and potentially below 70% at -10°C, this means that even if the battery is fully charged, the actual usable capacity is reduced, naturally shortening the battery's range.

This is especially true for vehicles using lead-acid batteries, where the effect of temperature is more pronounced. Many users find that the battery level appears normal when the vehicle is first started, but drops rapidly after riding for a while. This is a typical manifestation of low temperatures reducing usable capacity.

• Vehicles require more energy

Winter not only affects the battery itself but also increases overall vehicle energy consumption. Low temperatures cause tire pressure to drop, rubber to harden, and ground friction to increase. Under these conditions, vehicles consume more power and energy, leading to a decrease in overall battery range.

For vehicles with reducers or transmission systems, lubricating oil becomes less fluid and more viscous at low temperatures, increasing mechanical resistance. The motor needs to output more power to reach the same speed, and the vehicle consumes more energy to maintain normal operation, further reducing battery range.

Winter often brings strong winds, rain, and snow. These harsh environmental conditions also increase the power consumption of electric vehicles to maintain normal operation, leading to increased overall vehicle energy consumption and a decrease in range.

• Battery heating and protection system operation

Vehicles equipped with lithium batteries often also have a Battery Management System (BMS). This system typically activates battery protection measures when the temperature is too low, limiting charging and discharging current, reducing output power, and activating battery heating. While these functions protect the battery, they also increase power consumption.

• Frequent short-distance use affects battery life

In winter, frequent stopping and starting of the vehicle during short-distance transport can significantly reduce battery range. This is because the battery is initially at a low temperature. As the journey continues, the battery gradually warms up, and its performance recovers. However, if you only ride a few kilometers at a time, the battery hasn't reached its optimal operating state before you stop. The noticeable decrease in range will be more pronounced in this case.

3. Lead acid battery vs lithium battery. Which is more better for winter use

• Lead acid battery

Advantages: Low cost, mature technology

Disadvantages: Poor low-temperature performance, significant battery life reduction, relatively heavy.

• Lithium battery

Advantages: High energy density, lightweight, long cycle life

Disadvantages: Higher cost

Compared to lead-acid batteries, lithium batteries perform more stably in winter, while lead-acid batteries experience a more significant decrease in battery life.

4. Methods to reduce the impact of temperature on batteries

While the effects of low temperatures cannot be completely eliminated, the following methods can be used to effectively improve battery life.

• Place the vehicles indoors

Park your vehicle in indoor storage rooms, garages, or underground parking lots whenever possible. Avoid prolonged exposure to low temperatures. Higher storage temperatures help maintain battery activity.

• Charge promptly after use

In winter, avoid storing batteries when they are completely depleted or in a state of prolonged low charge. It is recommended to charge them when they have 20%-30% charge remaining.

• Warm up appropriately before charging

If the vehicle has just returned from a cold environment to a normal environment, do not charge the battery immediately. It is recommended to wait until the battery temperature rises above 5°C before charging. This will improve charging efficiency and protect the battery.

• Maintain proper tire pressure

Tire pressure tends to drop in winter. Regularly checking tire pressure can reduce rolling resistance, improve range, and increase driving safety.

• Drive smoothly

When using the vehicle, avoid sudden acceleration and braking. Take breaks during prolonged high-speed driving. Smooth driving not only reduces instantaneous power demand but also minimizes heat loss from the motor and battery. For logistics and delivery vehicles, proper speed control can often increase actual range by more than 10%.

• Use high-quality lithium batteries

For commercial transportation users, battery quality directly determines winter operational efficiency. High-quality lithium batteries typically have better low-temperature performance, higher energy density, and longer cycle life. They are also more resistant to the effects of low temperatures.

5. Will low temperatures in winter damage batteries

Under normal circumstances, the decrease in battery life during winter is due to changes in physical and chemical properties and will not permanently damage the battery. Battery capacity will recover, along with discharge efficiency and battery life, once the ambient temperature rises.

What truly affects battery life is overcharging and discharging, prolonged operation in high-temperature environments, and using inferior chargers. Low temperatures have a far smaller impact on battery life than improper charging.

6. How can technology address the impact of low temperatures on batteries

With the development of new energy vehicles, more and more regions are accepting and using electric vehicles. However, for markets in cold regions, the stable performance of batteries in low-temperature environments needs to be considered. Currently, technologies such as low-temperature lithium battery technology, intelligent thermal management systems, and battery preheating systems are under development to stabilize battery performance in low-temperature environments.

As battery technology continues to advance, the performance of electric vehicles in cold environments will continue to improve, providing more reliable green solutions for logistics, commercial delivery, and daily travel.

For users, choosing high-quality batteries, proper charging, reasonable driving, and good vehicle maintenance habits can all effectively reduce range loss in winter.