A method for operating a processor controlling a dual battery mounted on a hybrid electric vehicle, includes opening a relay positioned between a first battery for a load and a second battery for starting, and checking whether the attempt to start is successful when an attempt to start the hybrid electric vehicle is detected, closing the relay so that the first battery and the second battery are electrically connected in parallel when the processor concludes that the attempt to start is unsuccessful, and charging the second battery by entering the second battery into a charging mode when a reattempt to start the hybrid electric vehicle is successful.

A vehicle power supply device converts power from high voltage to low voltage by selectively connecting a predetermined power storage element group to a low voltage electric load from a high voltage power supply formed by connecting power storage elements in series. A leakage current from the high voltage power supply is measured during the dead time period when the power storage element group is not connected to the low voltage electric load. When the value exceeds a predetermined value, the connection between the power storage element group and the low-voltage electric load is interrupted, so that electric shock is prevented.

In an electric power device and a charging rate calculation method according to the present invention, a control unit: calculates a sum total (FCC) of respective full charging capacities of a plurality of detachable/attachable batteries; calculates a sum total (RC) of respective present charging capacities of the plurality of detachable/attachable batteries; and calculates an RSOC, which is an overall state of charge (SOC) of the plurality of detachable/attachable batteries, on the basis of the calculated sum total (FCC) of full charging capacities and the calculated sum total (RC) of present charging capacities.

A method of detecting safe and other states of battery while electric vehicle is being driven controls an inverter to generate ripple current on the battery; ripple voltages of a plurality of battery cells are measured, voltage phase shifts between the battery cells are calculated. The battery can be analyzed as normal or otherwise according to the voltage phase shift between plurality of the battery cells. A vehicle-mounted device and a non-volatile storage medium therein, for performing the above-described method, are also disclosed.

In a method for estimating a voltage of a battery a given electrochemical battery model is provided, wherein one parameter of the electrochemical battery model is an open circuit potential. The open circuit potential is linearized. The voltage of the battery is estimated by means of the electrochemical battery model with the linearized open circuit potential.

Systems and methods for a scalable battery controller are disclosed. In one example, a circuit board coupled to a battery cell stack is designed to be configurable to monitor and balance battery cells of battery cell stacks that may vary depending on battery pack requirements. Further, the battery pack control module may configure software instructions in response to a voltage at a battery cell stack.

An electric vehicle charging station charging electric vehicles dynamically responds to power limit messages. The charging station includes a charging port that is configured to electrically connect to an electric vehicle to provide power to charge that electric vehicle. The charging station also includes a power control unit coupled with the charging port, the power control unit configured to control an amount of power provided through the charging port. The charging station also includes a set of one or more charging station control modules that are configured to, in response to receipt of a message that indicates a request to limit an amount of power to an identified percentage and based on a history of power provided through the charging port over a period of time, cause the power control unit to limit the power provided through the charging port to the identified percentage.

A failure in any of first switches is determined based on a voltage value of a battery assembly and a predetermined threshold. The voltage value is retained in a capacitor by turning on or off the first switches and a second switch, and obtained from a voltage detector a voltage value.

A voltage measuring apparatus is configured to measure voltages of respective battery cells of a battery cell array including a plurality of battery cell groups each including a predetermined number of battery cells connected in series. The voltage measuring apparatus includes a plurality of measuring units each provided for each of the battery cell groups. The adjacent measuring units are connected through a communication channel so as to perform current communication therebetween. A bidirectional diode circuit element is connected to the communication channel extending between the adjacent measuring units.

The present invention discloses a system for managing rechargeable batteries to provide power to electrical vehicles. The system comprises a plurality of charging stations each if the intelligent charger includes at least an intelligent battery charger for charging the rechargeable batteries. The intelligent battery chargers further comprises a battery diagnostic detector for detecting and storing data of designated battery health management parameters. The intelligent battery chargers further comprises a transmitter for transmitting the data of the designated battery health management parameters as wireless signals to a networked server in a battery management center.