Power storage system
First Claim
1. A power storage system for a vehicle, the power storage system comprising:
- a battery configured to supply electric power to a motor for traveling of the vehicle, the battery being configured to be charged with external power supplied from an external power supply;
a temperature sensor configured to detect a temperature of the battery;
a battery heater configured to raise the temperature of the battery;
a charger configured to be connectable with the external power supply, and deliver the external power to the battery and the battery heater, respectively; and
a controller configured toperform charge control, the charge control being a control that charges the battery with the external power;
store a map, the map specifying a ratio of a temperature-elevating power supplied to the battery heater to a maximum power of the external power at which a charging time is minimum, for each temperature of the battery at the time when charging is started;
calculate the ratio, using the map, from the temperature of the battery measured when charging is started,perform temperature regulation control during charging, using constant temperature-elevating power corresponding to the calculated ratio, the temperature regulation control being a control that supplies the constant temperature-elevating power to the battery heater during charging so as to raise the temperature of the battery,perform the charge control and the temperature regulation control in a first charge mode and a second charge mode, the first charge mode being a mode in which the battery is charged with a first charging power until an amount of charge of the battery becomes equal to a first charge amount, and a first temperature-elevating power is supplied to the battery heater, the second charge mode being a mode in which the battery is charged with a second charging power as a fixed value after the amount of charge of the battery reaches the first charge amount, and a second temperature-elevating power is supplied to the battery heater,wherein the second charging power is greater than zero,wherein the second charging power is smaller than the first charging power.
1 Assignment
0 Petitions
Accused Products
Abstract
A power storage system for a vehicle includes a battery, a temperature sensor, a battery heater, a charger, and a controller. The battery is configured to supply electric power to a motor for traveling of the vehicle, and configured to be charged with external power supplied from an external power supply. The temperature sensor is configured to detect a temperature of the battery. The battery heater is configured to raise the temperature of the battery. The charger is configured to be connectable with the external power supply, and deliver the external power to the battery and the battery heater, respectively. The controller is configured to perform charge control. The charge control is a control that charges the battery with the external power. The controller is configured to store a map. The map specifies, for each temperature of the battery, a ratio of a temperature-elevating power supplied to the battery heater to a maximum power of the external power at the time when a charging time is minimized. The controller is configured to calculate the ratio, using the map, from the temperature of the battery measured at the time when charging is started. The controller is configured to perform temperature regulation control during charging, using the temperature-elevating power corresponding to the calculated ratio. The temperature regulation control is a control that supplies a part of the external power to the battery heater during charging so as to raise the temperature of the battery.
8 Citations
7 Claims
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1. A power storage system for a vehicle, the power storage system comprising:
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a battery configured to supply electric power to a motor for traveling of the vehicle, the battery being configured to be charged with external power supplied from an external power supply; a temperature sensor configured to detect a temperature of the battery; a battery heater configured to raise the temperature of the battery; a charger configured to be connectable with the external power supply, and deliver the external power to the battery and the battery heater, respectively; and a controller configured to perform charge control, the charge control being a control that charges the battery with the external power; store a map, the map specifying a ratio of a temperature-elevating power supplied to the battery heater to a maximum power of the external power at which a charging time is minimum, for each temperature of the battery at the time when charging is started; calculate the ratio, using the map, from the temperature of the battery measured when charging is started, perform temperature regulation control during charging, using constant temperature-elevating power corresponding to the calculated ratio, the temperature regulation control being a control that supplies the constant temperature-elevating power to the battery heater during charging so as to raise the temperature of the battery, perform the charge control and the temperature regulation control in a first charge mode and a second charge mode, the first charge mode being a mode in which the battery is charged with a first charging power until an amount of charge of the battery becomes equal to a first charge amount, and a first temperature-elevating power is supplied to the battery heater, the second charge mode being a mode in which the battery is charged with a second charging power as a fixed value after the amount of charge of the battery reaches the first charge amount, and a second temperature-elevating power is supplied to the battery heater, wherein the second charging power is greater than zero, wherein the second charging power is smaller than the first charging power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification