Power control device and power control method for hybrid vehicle
AssigneeBosch Corporation
InventorMasashi Yukawa
Life of this patent
Estimating the term…
Abstract
The present invention provides a power control device for a hybrid vehicle that can allow power generation by a generator connected to a low-voltage battery regardless of a charging rate of the low-voltage battery. The hybrid vehicle includes: a motor (21) that can be coupled to a drive wheel (18) of the vehicle; a generator (22) that can be coupled to an internal combustion engine (11); a first secondary battery (21) connected to the motor (21); a second secondary battery (32) that is connected to the generator (22), and a voltage of which is lower than that of the first secondary battery (31); and a converter (33) that steps up a DC voltage received from the second secondary battery (32) and can output the stepped-up DC voltage to the first secondary battery (31).
Claims5
A device (42) for controlling electric power of a hybrid vehicle, the power control device (42) comprising:
- an internal combustion engine (11);
- a motor (21) that can be coupled to a drive wheel (18) of the vehicle;
- a generator (22) that can be coupled to the internal combustion engine (11);
- a first secondary battery (31) that is connected to the motor (21);
- a second secondary battery (32) that is connected to the generator (22), and a voltage of which is lower than that of the first secondary battery (31);
- and
- a converter (33) that is connected to the first secondary battery (31) and the second secondary battery (32), steps up a DC voltage received from the second secondary battery (32), and can output the stepped-up DC voltage to the first secondary battery (31), wherein
- the power control device (42) of the hybrid vehicle is configured to supply electric power that is generated by the generator (22) to the first secondary battery (31) via the second secondary battery (32) and the converter (33) when a charging rate (SOC2) of the second secondary battery (32) is equal to or higher than a specified value or when an increase rate of the charging rate (SOC2) of the second secondary battery (32) is equal to or higher than a specified value.
A method for controlling electric power of a hybrid vehicle including:
- an internal combustion engine (11);
- a motor (21) that can generate drive power of the vehicle when being supplied with the electric power;
- a generator (22) that is driven by the internal combustion engine (11) and can generate the electric power;
- a first secondary battery (31) that can supply the electric power to the motor (21);
- a second secondary battery (32) that can be charged with the electric power generated by the generator (22), and a voltage of which is lower than that of the first secondary battery (31);
- and
- a converter (33) that steps up a DC voltage received from the second secondary battery (32) and can output the stepped-up DC voltage to the first secondary battery (31),
- the power control method for the hybrid vehicle comprising:
- supplying the electric power that is generated by the generator (22) to the first secondary battery (31) via the second secondary battery (32) and the converter (33) when a charging rate (SOC2) of the second secondary battery (32) is equal to or higher than a specified value or when an increase rate of the charging rate (SOC2) of the second secondary battery (32) is equal to or higher than a specified value.
Dependencies are inferred from the claim text.