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1. US20170361791 - Battery management system of vehicle with reconnection switch for connection state determination

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Claims

1. A battery management system of a vehicle, comprising:
a relay configured to electrically connect and disconnect power supplied to a load from a battery;
a reconnection switch configured to determine a connection state based on user manipulation and generate a signal for turning the relay on and off based on the connection state; and
a controller configured to turn the relay on and off based on the connection state of the reconnection switch,
wherein the controller is woken up as a battery voltage is applied to a second end of the reconnection switch when the reconnection switch is turned on, is configured to receive a mileage of the vehicle after being woken up, and configured to output a control signal for turning off the relay when the mileage is less than a preset reference value.
2. The battery management system according to claim 1, wherein the controller includes a standby power inputter connected to the battery to receive driving power.
3. The battery management system according to claim 1, wherein:
the controller includes a wake-up inputter configured to receive a connection signal of the reconnection switch or an accessory-on or ignition-on signal based on a key input of the vehicle and generate a wake-up signal; and
the controller is woken up when the wake-up signal is generated.
4. The battery management system according to claim 1, wherein:
the controller includes a relay controller configured to turn the relay on and off based on a connection signal of the reconnection switch; and
the relay controller is configured to turn the relay on and off based on control of a pulse waveform.
5. The battery management system according to claim 1, wherein:
the controller further includes a voltage sensor configured to sense a voltage at a rear end of the relay; and
the controller is woken up as a battery voltage is applied to a second end of the reconnection switch when the reconnection switch is turned on, and is configured to output a control signal for turning on the relay after being woken up when a sensing voltage of the voltage sensor is within a preset normal voltage range.
6. A battery management system of a vehicle, comprising:
a relay configured to electrically connect and disconnect power supplied to a load from a battery;
a reconnection switch configured to determine a connection state based on user manipulation and generate a signal for turning the relay on and off based on the connection state;
a controller connected directly to the battery and configured to receive standby power, set a time period for being woken up, output a control signal for turning off the relay when a voltage of the battery is equal to or less than a preset threshold value, and turn the relay on and off based on the connection state of the reconnection switch; and
a voltage sensor configured to sense a voltage at a rear end of the relay,
wherein the controller is configured to change the time period after the relay is turned off,
wherein the controller is configured to receive a first sensing voltage of the voltage sensor after outputting a control signal for turning off the relay, receive a second sensing voltage of the voltage sensor after outputting a control signal for turning on the relay, and determine that fusion of the relay occurs when the first sensing voltage and the second sensing voltage are about the same, when the vehicle is turned off, and
wherein the controller is woken up as a battery voltage is applied to a second end of the reconnection switch when the reconnection switch is turned on, is configured to receive a mileage of the vehicle after being woken up, and configured to output a control signal for turning off the relay when the mileage is less than a preset reference value.
7. The battery management system according to claim 6, wherein the controller is configured to set the time period to be longer than a time period set before the relay is turned off or does not set the time period not to be woken up after the relay is turned off.
8. The battery management system according to claim 7,
wherein the controller is woken up based on a connection signal of the reconnection switch or an accessory-on or ignition-on signal based on a key input of the vehicle.
9. The battery management system according to claim 6, wherein the controller is configured to set the time period to be longer than a time period set before the relay is turned off or does not set the time period not to be woken up in response to determining that fusion of the relay occurs.