Tesla Battery Temperature at Different Charging Speeds

In the charging records we reviewed, sessions that reached higher charging rates generally had higher maximum battery temperatures. The NCM/NCA group also had higher typical temperature peaks than the LFP group. But the ranges overlap, and a battery can get quite warm even during slower charging.

To compare batteries of different sizes, we use C-rate. It describes charging current relative to battery capacity. For the same battery, 1C means twice the current of 0.5C, and 2C means twice the current of 1C.

The chart compares four groups: below 0.5C, 0.5–<1C, 1–<2C, and 2C or higher. All are DC charging sessions.

For each recorded session, we use the fastest charging rate it reached and the highest battery temperature it reached. Those peaks can happen at different times. For example, a session that reaches 2.5C early still belongs to the ≥2C group even if the battery becomes hottest later, after charging slows down.

The line inside each box marks the middle result. The box covers the middle half of session maximum temperatures, and the dots show unusually high or low results.

Both groups show a rise in typical maximum temperature as charging rate increases. At 2C and above, the middle result is about 53°C for LFP and 59°C for NCM/NCA. These are the highest temperatures reached during the sessions, rather than the temperatures maintained throughout charging.

Some lower-rate sessions also exceeded 60°C. In one checked NCM/NCA session, the hottest battery module rose from 50°C to 61.5°C even though the peak charging rate was approximately 0.49C. That session lasted about 94 minutes. Its original vehicle log confirms the temperature readings.

This is possible because charging current is only one influence on battery temperature. The battery may already be warm when charging begins, and the car actively manages heating and cooling. Tesla's Model 3 service manual explains that the vehicle can heat or cool the battery before and during charging when needed. Tesla Model 3 service manual.

The LFP and NCM/NCA results also reflect different vehicles, battery designs, starting conditions, and cooling behavior. The gap between them cannot be attributed to battery chemistry alone.

The chart uses the temperature reported for the hottest battery module. It shows what was observed during recorded charging sessions, which may cover only part of a charging visit. These temperatures are not recommended targets for charging your car.