Battery management apparatus and system
A slave battery management apparatus includes a sensor configured to sense a physical quantity of a battery; a voltage converter configured to receive an output physical quantity from the battery, to convert the output physical quantity into an operating physical quantity corresponding to a physical quantity to operate a controller, and to output the operating physical quantity to the controller; and a controller configured to use the operating physical quantity as an operating power and to transmit battery data by using the operating physical quantity, wherein the battery data is generated based on the sensed physical quantity.
1. A slave battery management apparatus, comprising:
a sensor configured to sense a parameter of a battery;
a voltage converter configured to filter output voltage of the battery, convert the filtered output voltage into a first voltage, smooth the first voltage, and output a signal by adjusting a magnitude of the smoothed first voltage; and
a controller configured to transmit battery data by using the outputted signal as an operating power,
wherein the battery data is generated based on the sensed parameter.
2. The slave battery management apparatus of claim 1 , wherein the voltage converter comprises:
a filter configured to filter the output voltage of the battery,
a first converter configured to convert the filtered output voltage into the first voltage,
a smoother configured to remove a ripple component from the first voltage to smooth the first voltage, and
a second converter configured to adjust a magnitude of a ripple-free DC voltage obtained by removing the ripple component from the DC voltage, the ripple-free DC voltage corresponding to the smoothed first voltage.
3. The slave battery management apparatus of claim 2 , wherein the second converter is further configured to step up the ripple-free DC voltage in response to an operating voltage of the controller being greater than or equal to an output voltage of the battery, and to step down the ripple-free DC voltage in response to the operating voltage being less than the output voltage.
4. The slave battery management apparatus of claim 2 , wherein the voltage converter further comprises:
an insulator configured to electrically insulate the battery from the controller.
5. The slave battery management apparatus of claim 1 , wherein
the battery data comprises first parameter data corresponding to the parameter,
the controller is further configured to transmit the first parameter data to a master battery management apparatus, to receive a first control signal defined based on a result of a comparison between first state information of the battery and a reference value from the master battery management apparatus, and to enter a sleep mode based on the first control signal, and
the first state information is determined based on the first parameter data.
6. The slave battery management apparatus of claim 5 , wherein the voltage converter is further configured to perform a sensing operation and a voltage conversion operation while being prevented from performing other operations while the slave battery management apparatus is in the sleep mode.
7. The slave battery management apparatus of claim 5 , wherein
in response to the battery being charged, the battery data comprises second parameter data corresponding to the parameter, and
the controller is further configured to transmit the second parameter data to the master battery management apparatus, to receive a second control signal from the master battery management apparatus in response to second state information being greater than the reference value, and to shift an operation mode from the sleep mode to a normal mode based on the second control signal, and
the second state information is determined based on the second parameter data.
8. The slave battery management apparatus of claim 5 , wherein the reference value is determined based on an operating time during which the slave battery management apparatus operates using a remaining amount of charge in the battery.
9. The slave battery management apparatus of claim 1 , further comprising:
a DC-to-DC (DC/DC) converter configured to convert an output voltage of the battery into a voltage to be output to a load,
wherein the battery data comprises state information determined based on the sensed parameter, and
wherein the controller is further configured to control the DC/DC converter using a control value corresponding to the state information.
10. The slave battery management apparatus of claim 1 , wherein the output signal is the only power source of the controller.
11. A battery management system comprising:
a master battery management apparatus; and
at least one slave battery management apparatus configured to communicate with the master battery management apparatus,
the slave battery management apparatus comprises:
a controller;
a sensor configured to sense a parameter of a battery; and,
a voltage converter configured to filter output voltage of the battery, convert the filtered output voltage into a first voltage, smooth the first voltage, and output a signal by adjusting a magnitude of the smoothed first voltage,
wherein the controller is configured to transmit battery data to the master battery management apparatus by using the outputted signal as an operating power, the battery data being generated based on the sensed parameter.
12. The battery management system of claim 11 , wherein the voltage converter comprises:
a filter configured to filter the output voltage of the battery;
a first converter configured to convert the filtered output voltage into the first voltage;
a smoother configured to remove a ripple component from the first voltage to smooth the first voltage; and
a second converter configured to adjust a magnitude of a ripple-free DC voltage obtained by removing the ripple component from the DC voltage, the ripple-free DC voltage corresponding to the smoothed first voltage.
13. The battery management system of claim 12 , wherein the second converter is further configured to step up the ripple-free DC voltage in response to an operating voltage of the controller being greater than or equal to an output voltage of the battery, and step down the ripple-free DC voltage in response to the required voltage being less than the output voltage.
14. The battery management system of claim 11 , wherein
the battery data comprises first parameter data corresponding to the parameter,
the controller is further configured to transmit the first parameter data to the master battery management apparatus, to receive a first control signal from the master battery management apparatus, and to enter a sleep mode based on the first control signal, and
the master battery management apparatus is configured to determine first state information of the battery based on the first parameter data, to define the first control signal based on a result of comparison between the first state information of the battery and a reference value, and to transmit the first control signal to the controller.
15. The battery management system of claim 14 , wherein
in response to the battery being charged, the battery data comprises second parameter data corresponding to the parameter,
the controller is further configured to transmit the second parameter data to the master battery management apparatus, to receive a second control signal from the master battery management apparatus, and to shift an operation mode from the sleep mode to a normal mode based on the second control signal, and
the master battery management apparatus is further configured to determine second state information based on the second parameter data, to define the second control signal in response the second state information being greater than the reference value, and to transmit the second control signal to the controller.
16. The battery management system of claim 14 , wherein the reference value is determined based on an operating time during which the slave battery management apparatus operates using a remaining amount of charge in the battery.
17. The battery management system of claim 11 , wherein
the slave battery management apparatus further comprises a DC-to-DC (DC/DC) converter configured to convert an output voltage of the battery into a voltage to be output to a load,
the battery data comprises state information determined based on the sensed parameter, and
the controller is further configured to control the DC/DC converter using a control value corresponding to the state information.
18. The battery management system of claim 17 , wherein
the controller is further configured to transmit the state information to the master battery management apparatus, and
the master battery management apparatus is configured to determine the control value that corresponds to the state information, based on a sensed value of the load, and to transmit the control value to the controller.
19. An operation method of a slave battery management apparatus, the method comprising:
sensing a parameter of a battery;
filtering output voltage of the battery;
converting the filtered output voltage into a first voltage;
smoothing the first voltage;
outputting a signal by adjusting a magnitude of the smoothed first voltage; and
transmitting battery data by using the outputted signal as an operating power, wherein the battery data is generated based on sensed parameter.
20. The operation method of claim 19 , wherein
the smoothing of the first voltage comprises removing a ripple component from the first voltage, and
the outputting of the operating power comprises adjusting a magnitude of a ripple-free DC voltage obtained by removing the ripple component from the DC voltage, the ripple-free DC voltage corresponding to the smoothed first voltage.