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US 9,851,405 B2Granted
Method and apparatus for detecting state of relay
AssigneeSamsung Electronics Co., Ltd.
InventorJinyong Jeon
Life of this patent
Estimating the term…
Abstract
An apparatus for detecting a state of a relay includes a voltage outputter configured to output a voltage having a different voltage value for each state of each of a plurality of relays configured to switch a connection between a battery and a load, and a controller configured to determine whether each of the plurality of relays is welded based on the voltage output from the voltage outputter.
Claims16
An apparatus for detecting a state of a relay, the apparatus comprising:
- a voltage outputter configured to output a voltage having a different voltage value for each state of each of a plurality of relays configured to switch a connection between a battery and a load;
- a controller configured to determine whether each of the plurality of relays is welded based on the voltage output from the voltage outputter;
- and
- a voltage transmitter configured to transmit the voltage output from the voltage outputter to the controller and to adjust the voltage output from the voltage outputter to be a voltage that can be input to the controller,
- wherein the plurality of relays comprise:
- a first relay connected to an anode of the battery;
- a second relay connected to a cathode of the battery;
- and
- a third relay connected in series with an auxiliary resistance, with the series-connected third relay and auxiliary resistance being connected in parallel with the first relay,
- wherein the voltage outputter comprises:
- an operational amplifier;
- and
- a plurality of resistances connected to an inverting terminal and a non-inverting terminal of the operational amplifier, and
- the voltage outputter is further configured to output the voltage from an output terminal of the operational amplifier,
- wherein the plurality of resistances comprises:
- a first resistance connected between the inverting terminal and a point where the first relay and the third relay are connected to each other;
- a second resistance connected between the inverting terminal and the output terminal of the operational amplifier;
- a third resistance connected between the non-inverting terminal and an external power source;
- a fourth resistance connected between the second relay and the non-inverting terminal;
- and
- a fifth resistance connected between a ground and a point where the first relay, the third relay, and the first resistance are connected to each other.
18 more elements
A method of detecting a state of a relay, the method comprising:
- detecting a voltage having a different voltage value for each state of each of a plurality of relays configured to switch a connection between a battery and a load;
- transmitting the detected voltage to a controller;
- determining whether each of the plurality of relays is welded based on the detected voltage;
- and
- adjusting the voltage output from the voltage outputter to be a voltage that can be input to the controller,
- wherein the plurality of relays comprise:
- a first relay connected to an anode of the battery;
- a second relay connected to a cathode of the battery;
- and
- a third relay connected in series with an auxiliary resistance, with the series-connected third relay and auxiliary resistance being connected in parallel with the first relay,
- wherein the voltage outputter comprises:
- an operational amplifier;
- and
- a plurality of resistances connected to an inverting terminal and a non-inverting terminal of the operational amplifier, and
- the voltage outputter is further configured to output the voltage from an output terminal of the operational amplifier,
- wherein the plurality of resistances comprises:
- a first resistance connected between the inverting terminal and a point where the first relay and the third relay are connected to each other;
- a second resistance connected between the inverting terminal and the output terminal of the operational amplifier;
- a third resistance connected between the non-inverting terminal and an external power source;
- a fourth resistance connected between the second relay and the non-inverting terminal;
- and
- a fifth resistance connected between a ground and a point where the first relay, the third relay, and the first resistance are connected to each other.
19 more elements
Dependencies are inferred from the claim text.