Relay control apparatus, battery pack and electric vehicle
AssigneeLG Energy Solution, Ltd.
InventorsHo-Been Choi, Young-Min Kim
Life of this patent
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Abstract
A relay control apparatus for a relay including a contact connected between a positive electrode of a battery and a load, and a coil connected between a relay power terminal and a ground in which the contact moves to a closed position when the coil is energized. The relay control apparatus includes a coil control switch which is turned on in response to a first switching signal having a voltage level that is equal to or higher than a first threshold voltage in response to a relay on-command, and a relay holding circuit configured to store emergency power using power supplied from the battery.
Claims12
A relay control apparatus for a relay including a contact connected between a positive electrode of a battery and a load;
- and a coil connected between a relay power terminal and a ground wherein the contact moves to a closed position when the coil is energized, the relay control apparatus comprising:
- a control circuit configured to output a first switching signal having a voltage level that is equal to or higher than a first threshold voltage in response to a relay on-command;
- a coil control switch connected between a first terminal of the coil and the relay power terminal or between an opposite second terminal of the coil and the ground, wherein the coil control switch is configured to turn on in response to the first switching signal;
- and
- a relay holding circuit configured to store emergency power using power supplied from the battery,
- wherein the relay holding circuit is configured to output the first switching signal instead of the control circuit using the emergency power when the control circuit is unable to output the first switching signal.
Dependencies are inferred from the claim text.