Abstract: A converter system for a vehicle including: a bi-directional converter electrically connected between a main battery and an auxiliary battery and configured to perform power conversion; a gate driver electrically connected to the bi-directional converter and configured to apply a PWM signal for controlling a driving mode of the bi-directional converter; a converter controller electrically connected to the gate driver and configured to apply a control signal for controlling driving of the gate driver; a control switch interposed between the converter controller and the gate driver and configured to connect or disconnect a connection between the converter controller and the gate driver; and a battery management system electrically connected to the gate driver through the control switch and configured to apply a control signal to control driving of the gate driver based on an abnormality in the converter controller.

Abstract: A driving control device for a relay for a battery pack, includes: a buck-boost converter to receive a voltage from an auxiliary battery, and output a buck-boost voltage; a feedback control circuit electrically connected to the buck-boost converter, and to transfer a feedback voltage to the buck-boost converter to control the buck-boost voltage output from the buck-boost converter; and a relay control circuit to apply or block the buck-boost voltage to a relay electrically connected to at least one of a positive electrode terminal or a negative electrode terminal of a main battery. The buck-boost converter is to output the buck-boost voltage according to the feedback voltage, and the buck-boost voltage has a smaller sustaining voltage for maintaining the relay in an on state than a first reference voltage for turning on the relay.

Abstract: A battery pack includes a first battery with a first capacity, a second battery with a second capacity less than the first capacity, and a variable resistor. The second battery has a larger maximum discharge current than the first battery. The variable resistor circuit limits the discharge current of the first battery to a predetermined limit current value.

Abstract: A battery pack includes a first battery with a first capacity, a second battery with a second capacity less than the first capacity, and a variable resistor. The second battery has a larger maximum discharge current than the first battery. The variable resistor circuit limits the discharge current of the first battery to a predetermined limit current value.

Abstract: A two-stage insulated bidirectional DC/DC power converter is disclosed. A two-stage insulated bidirectional DC/DC power converter according to an embodiment of the invention has the characteristic of including: an LLC resonant converter operating at a constant duty ratio; a bidirectional converter joined to a front part of the LLC resonant converter and configured to perform a booster converter function of outputting the input voltage at a consistent input voltage for the LLC resonant converter, and a buck converter function of reducing the voltage by way of the LLC resonant converter and then outputting a consistent voltage; and a bidirectional converter control unit configured to control changes in an input voltage of the bidirectional converter and regulate an output voltage of the LLC resonant converter to thereby maintain a consistent input voltage of the LLC resonant converter, such that the LLC resonant converter operates at a constant duty ratio.

Abstract: A two-stage insulated bidirectional DC/DC power converter is disclosed. A two-stage insulated bidirectional DC/DC power converter according to an embodiment of the invention has the characteristic of including: an LLC resonant converter operating at a constant duty ratio; a bidirectional converter joined to a front part of the LLC resonant converter and configured to perform a booster converter function of outputting the input voltage at a consistent input voltage for the LLC resonant converter, and a buck converter function of reducing the voltage by way of the LLC resonant converter and then outputting a consistent voltage; and a bidirectional converter control unit configured to control changes in an input voltage of the bidirectional converter and regulate an output voltage of the LLC resonant converter to thereby maintain a consistent input voltage of the LLC resonant converter, such that the LLC resonant converter operates at a constant duty ratio.