US 8,409,052 B2 · Starting method for hybrid electric vehicle and system architecture of hybrid electric vehicle

Abstract

Provided is a starting method for hybrid electric vehicle, which includes the steps of: (a1) as the temperature of a battery module of the hybrid electric vehicle is below a first threshold temperature, allowing the vehicle control unit of the hybrid electric vehicle to turn on a first switch; (a2) converting the DC power transmitted from the battery module to an integrated starter generator of the vehicle through the first switch into a first AC power by the integrated starter generator which is operating under the starter mode, and starting the internal combustion engine of the vehicle with the first AC power; and (a3) executing a heating process to warm up the battery module by a battery heater, in which the charging line between the integrated starter generator and the battery module is cut off and the integrated starter generator is operating under a rectifier sub-mode, thereby allowing the integrated starter generator to supply electric power to the battery heater in order to heat the battery module.

Claims16

Dependent claims

A starting method for hybrid electric vehicle, comprising:

(a1) as the temperature of a battery module of the hybrid electric vehicle is below a first threshold temperature, allowing a vehicle control unit of the hybrid electric vehicle to turn on a first switch;
(a2) converting DC power transmitted from the battery module to a integrated starter generator of the hybrid electric vehicle through the first switch into a first AC power by the integrated starter generator which is operating under the starter mode, and starting an internal combustion engine of the hybrid electric vehicle with the first AC power;
and
(a3) executing a heating process to warm up the battery module by a battery heater.

1 more element

A hybrid electric vehicle, comprising:

an internal combustion engine for combusting fuel to transform chemical energy into mechanical power;
an integrated starter generator mechanically connected to the internal combustion engine for providing power required to start the internal combustion engine or generating electric energy by the power provided by the internal combustion engine;
a traction motor electrically connected to integrated starter generator for generating power required to propel the hybrid electric vehicle by a DC power;
a transmission for outputting power to propel the hybrid electric vehicle;
a battery module for storing electric energy;
a battery heater for selectively heating the battery module;
a switch unit electrically connected to the integrated starter generator, the battery module, and the battery heater;
and
a vehicle control unit for controlling the driving of the hybrid electric vehicle;
when the battery module is below a first threshold temperature which is a relatively low temperature, the vehicle control unit executes a starting process to allow the battery heater to receive the power generated by the integrated starter generator through the switch unit and heat the battery module through the switching operation of the switch unit and stops charging the battery module.

7 more elements

Dependencies are inferred from the claim text.

Starting method for hybrid electric vehicle and system architecture of hybrid electric vehicle

Life of this patent

Starting method for hybrid electric vehicle and system architecture of hybrid electric vehicle

Life of this patent

Abstract

Claims16