The present invention provides a start control system of a vehicle, including: an electronic control unit (ECU), a starter, an air conditioner, and a starting power supply. The starting power supply includes a starting battery and a battery management system (BMS). At a low-temperature environment, when receiving an ignition request signal sent by the ECU, the BMS detects the temperature of the starting battery. When the temperature is less than a preset threshold, the starting battery is connected to the air conditioner for a preset time, so that the starting battery effectively raises the temperature of the starting battery by means of discharging at a high current temporarily. The start control system of a vehicle improves an ignition capability of a vehicle in a low-temperature environment, extends a temperature range and an area of using the vehicle, and improves competitiveness of the vehicle. The present invention further provides a vehicle having the start control system of a vehicle.

Power storage system includes battery containing an electrolytic solution, and ECU that controls permission and prohibition of charge/discharge of battery based on inside temperature of battery. ECU sets determination temperature equal to or higher than freezing point of the electrolytic solution and determination temperature higher than determination temperature. ECU prohibits charge/discharge of battery when inside temperature falls below determination temperature while the electrolytic solution is in a liquid state, and cancels the prohibition of charge/discharge of battery when the electrolytic solution turns into the liquid state from a state in which the electrolytic solution is at least partially solidified, and when the temperature of battery exceeds determination temperature.

A utility vehicle includes an electric motor for driving a propelling device, a battery for supplying electric power to the electric motor, a temperature sensor configured to detect a temperature of the battery, a discharge current setting unit for setting an upper limit discharge current value based on the detected temperature detected by the temperature sensor, and a control unit for regulating discharge current of the battery within the upper limit discharge current value determined by the discharge current setting unit and for controlling driving of the electric motor.

A controller of a vehicle may be programmed to charge and discharge a battery according to a state of charge derived from model parameters defining one of a series of RC circuits that characterize frequency response of the battery to input current and that each has a time constant proportional to another of the time constants, and a proportionality parameter indicative of proportional relationship between the time constants. The proportionality parameter may be such that a ratio of the resistances of the RC circuits is equal to a ratio of the capacitances of the RC circuits.

Provided is a drive device for a rotating electric machine, including: a power conversion unit configured to convert DC power supplied from a storage battery into AC power, and to supply the AC power to a rotating electric machine; and a control unit output a switching signal to the power conversion unit. The control unit is configured to set, when the storage battery is to be charged, in a case in which a temperature of the storage battery input from an outside is lower than a set temperature suitable for charging, the switching signal for the power conversion unit so as to be different from the switching signal in a normal drive state of the rotating electric machine.

Provided is a technique that can raise the temperature of a battery unit more effectively with a simpler configuration. An in-vehicle backup power supply device includes a battery unit in which a plurality of unit batteries are connected in series, a voltage conversion unit provided with a plurality of converters that step up or down a voltage that is input and output the resultant voltage, and a control unit configured to control the voltage conversion unit, a first circuit unit constituting a power path between the voltage conversion unit and the battery unit; and a second circuit unit constituting a power path between the voltage conversion unit and a load, the battery unit is provided with a plurality of conversion target portions, the conversion target portions are constituted by the unit battery or a plurality of the unit batteries connected in series.

A vehicle power supply system includes two drive motors, a first power line to which a first inverter and a first battery are connected, a second power line to which a second inverter and a second battery are connected, a voltage converter that converts a voltage between these power lines, and a charging and discharging control device that controls charging and discharging of the batteries by operating the inverters and the voltage converter. In a case where a second SOC is equal to or greater than a second normal upper limit, the charging and discharging control device discharges power from the second battery to the second power line, and discharges a shortage of power from the first battery through the voltage converter to the second power line, wherein the shortage of power is obtained by excluding power discharged by the second battery from power required in the second power line.

The present invention describes a method using temperature data to protect battery health during bidirectional charging in conjunction with monetization activities. The method includes receiving temperature data and determining anticipated energy needs of a building. The temperature data includes at least the temperature of one or more electric vehicle batteries or information required to determine the temperature of the one or more electric vehicle batteries while the anticipated energy needs are relative to ambient air temperature. The method includes determining an amount of discharge of the one or more electric vehicle batteries required to offset the anticipated needs of the building by a predetermined amount and determining based on the temperature data whether discharging the one or more electric vehicle batteries would be harmful to the health of the one or more electric vehicle batteries. The method includes discharging the one or more electric vehicle batteries to offset the anticipated needs of the building.

The present invention describes a method using temperature data to protect battery health during bidirectional charging in conjunction with monetization activities. The method includes receiving temperature data and determining anticipated energy needs of a building. The temperature data includes at least the temperature of one or more electric vehicle batteries or information required to determine the temperature of the one or more electric vehicle batteries while the anticipated energy needs are relative to ambient air temperature. The method includes determining an amount of discharge of the one or more electric vehicle batteries required to offset the anticipated needs of the building by a predetermined amount and determining based on the temperature data whether discharging the one or more electric vehicle batteries would be harmful to the health of the one or more electric vehicle batteries. The method includes discharging the one or more electric vehicle batteries to offset the anticipated needs of the building.

An electrically driven, movable underground vehicle and a method for operating the same, includes a chassis with at least two driven drive wheels, an electrical trailing cable for connection to an electrical supply network, an electric drive motor, which is electrically connected to the trailing cable, for driving the drive wheels, and an energy storage unit. The vehicle further includes an auxiliary drive motor with a subsequent hydraulic fluid transmission, a switchgear assembly and a processor for controlling the supply of the electric drive motor and the electric auxiliary drive motor with electrical energy. The drive motor directly drives the drive wheels while bypassing the hydraulic fluid transmission. Also, the energy provided by the energy storage unit is sufficient for driving the drive wheels and for temporarily moving the load-haul-dump machine independently of the supply network.