Electric motor with cooling system and corresponding method

A method, comprising:

• charging a heat accumulator with waste heat from an electric motor;
• and
• discharging the heat accumulator to heat a battery,
• wherein the charging step includes directing coolant from an electric motor to a heat accumulator via a heating line,
• wherein the discharging step includes directing coolant from the heat accumulator to the battery via a short-circuit line, the heat accumulator is arranged in the short-circuit line, and
• wherein the discharging step includes running a pump arranged in the short-circuit line.

A method, comprising:

• charging a heat accumulator with waste heat from an electric motor;
• and
• discharging the heat accumulator to heat a battery,
• wherein the charging step includes directing coolant from an electric motor to a heat accumulator via a heating line,
• wherein the discharging step includes directing coolant from the heat accumulator to the battery via a short-circuit line, the heat accumulator is arranged in the short-circuit line, and
• wherein the short-circuit line is provided between a first point downstream of a battery and a second point upstream of the battery.