Battery heater device
View Patent ↗A battery heater device which heats a battery with a plurality of cells mounted on a vehicle comprises a first heater part which heats cells positioned at an outer side in the battery; a second heater part which heats cells positioned at an inner side in the battery; and a controller which controls power to be supplied to the first and second heater parts; wherein the controller reduces the power supplied to the second heater part at a predetermined timing after start of the power supply to the first and second heater parts, thereby improving quick-heating performance of the battery and heating the battery more uniformly with use of simple arrangement.
1. A battery heater device adapted to be connected to a power supply that supplies power to the battery heater device, the battery heater device being configured to heat a battery with a plurality of cells mounted on a vehicle, the battery heater comprising:
a first heater part configured to heat cells positioned at an outer side in the battery;
a second heater part positioned in an area defined by the first heater part, the second heater part is configured to heat cells positioned at an inner side in the battery; and
a controller which controls power to be supplied to the first and second heater parts,
wherein the controller reduces a power supplied to the second heater part, without reducing a power supplied to the first heater part, at a predetermined timing after start of the power supply to the first and second heater parts.
2. The battery heater device according to claim 1 , wherein the controller starts the power supply to the first and second heater parts when the vehicle is switched off by a switch.
3. The battery heater device according to claim 1 , further comprising a temperature sensor to detect a temperature of the battery, wherein the controller starts the power supply to the first and second heater parts when the temperature sensor detects a temperature of the battery which is equal to or lower than a predetermined temperature.
4. The battery heater device according to claim 1 , wherein the controller stops the power supply to the first and second heater parts when the vehicle is switched on.
5. The battery heater device according to claim 1 , further comprising a temperature sensor to detect a temperature of the battery,
wherein the controller stops the power supply to the first and second heater parts when the temperature sensor detects a temperature of the battery which is equal to or higher than a predetermined temperature.
6. The battery heater device according to claim 3 , wherein the predetermined temperature is set to a temperature under which performance of the battery is not worsened.
7. The battery heater device according to claim 5 , wherein the predetermined temperature is set to a temperature under which the battery does not deteriorate.