RU-2861316-C1 - HYBRID POWER PLANT OF VEHICLE

Abstract

FIELD: transport engineering. SUBSTANCE: hybrid power plant of a vehicle consists of an internal combustion engine connected to an electric machine, an alternating current to direct current converter, a traction battery, a traction electric motor, a switching device, a charging cable with a socket for connection to an external electrical network, a cable with a socket for connecting external consumers. An alternating current generator with parameters of the generated voltage corresponding to the parameters of the alternating current in the electrical circuit of the external charging connector is used as the electric machine. The generator is connected to the alternating current to direct current converter. The charging socket is connected to the electrical circuit between the generator and the converter. The socket for connecting external consumers is connected to the same section of the electrical circuit as the charging socket. EFFECT: efficiency and reliability of using the power plant. 4 cl, 3 dwg

Inventors

• TYUFYAKOV ANDREJ SEMENOVICH
• KHORYCHEV ARTEM ALEKSANDROVICH
• SHAGURIN ALEKSEJ LEONOVICH

Dates

Publication Date

20260504

Application Date

20250227

Claims (5)

1. 1. A hybrid power plant of a vehicle consisting of an internal combustion engine mechanically connected to an electric machine having electrical output lines, an AC to DC voltage converter, a traction battery, a traction electric motor, a switching device in the electrical circuit of the electric machine, a charging cable with a socket for connection to an external AC electrical network, a cable with a socket for connection of external AC consumers,
2. characterized in that an alternating current generator with parameters of the generated voltage corresponding to the parameters of the alternating current in the electrical circuit of the external charging connector is used as an electric machine, wherein said generator with all of its available output lines is connected to a converter of alternating current voltage into direct current voltage, the charging socket with all of its available electrical lines is connected to the electrical circuit between the alternating current generator and the converter of the generated alternating current voltage into direct current voltage, and the socket for connecting external alternating current consumers with all of its available electrical lines is connected to the same section of the electrical circuit as the charging socket.
3. 2. A hybrid power plant according to paragraph 1, characterized in that the vehicle charging socket and the socket for connecting external AC consumers are made in the form of a single structural element.
4. 3. A hybrid power plant according to paragraphs 1 and 2, characterized in that there is at least one switching device in the electrical circuits between the alternating current voltage generator and the alternating current voltage converter to direct current voltage.
5. 4. A hybrid power plant according to paragraphs 1-3, characterized in that an asynchronous single-phase electric machine is used as a generator.

Description

The invention relates to the field of transport engineering, namely to the design of power plants for vehicles. Hybrid powertrains are widely used in modern vehicles, using a combined drive system from both an electric motor and an internal combustion engine (ICE). The key feature of these systems is that the vehicle is propelled by both the ICE itself and the electrical energy stored in the battery, which is converted into mechanical energy by one or more traction motors. State of the art One type of hybrid powertrain, an example of which is described in U.S. Patent Application No. 2022/0097676 A1, filed March 31, 2022, includes a so-called "series" design. In this design, an internal combustion engine (ICE), which is not mechanically connected to the vehicle's drive wheels, drives a synchronous electric machine (SEM). The SEM generates three-phase alternating current (AC) sent through a three-phase inverter (converter) to one or more DC traction motors (DC traction motors), which drive the vehicle's drive wheels and also maintain a charged state for one or more traction batteries (TB), which are used as a power source for vehicle propulsion when the ICE is stopped. This design includes switching means for connecting the inverter to the TB and controlling the power supply circuits to provide electrical power to the vehicle's electric drive. A similar power plant circuit, described in the US patent application US No. 2018/0257635 A1 dated September 13, 2018, in addition to solving the above-described problems of controlling the power electrical circuits of the hybrid power plant of a vehicle, provides for the presence of means for charging the hybrid power plant from an AC electrical network, which makes it possible to reduce the time of use of the internal combustion engine while maintaining its charge level at the required level in order to ensure the possibility of moving the vehicle solely on electric traction over a long distance. A power plant with similar properties, having a means for charging the high-voltage battery from an external AC electrical network, as well as a means for switching the high-voltage electrical circuit, located between the high-voltage battery and the inverter connected to the synchronous electric machine, is described in patent EP No. 2404801 B1 dated 05.03.2009. The powertrain designs described above include an internal combustion engine mechanically coupled to an electric machine and inverter, which generate direct current for charging the traction battery and powering the vehicle's traction motor. These systems also include a high-voltage traction battery charging unit (HBU) from an external AC power grid. This external battery charging unit converts the AC voltage of an external 220 V single-phase household electrical network into a higher DC voltage of approximately 350-450 V, which is required for charging the HBU. An example of the structure of a device for charging a hybrid vehicle's EV from an external AC network is described in the US patent application US No. 2015/0283913 A1 dated October 8, 2015. Such a device is connected to an AC network via a rectifier bridge that converts sinusoidal AC voltage into DC voltage, and then to a pulse device for converting the resulting DC into rectangular DC pulses supplied to the primary winding of the AC/DC voltage converter transformer, suitable for charging the EV. However, none of the above-described known technical solutions can fully provide a hybrid vehicle with, in addition to charging the battery and powering its traction electric motor, the ability to function as a mobile power station for powering high-power external devices driven by the vehicle's internal combustion engine, or as a power station for powering high-power external devices designed to operate from an industrial AC network. This function is important for specialized hybrid vehicles performing technical work, for example, when the vehicle is parked, using external electrical equipment designed to operate from 220/380 V AC in the absence of an accessible AC power grid. To operate such a system as a mobile power station, it must be equipped with a suitable voltage converter that converts high voltage (350-450 V) DC to 220/380 V AC. Known household DC/AC converters for powering additional equipment designed to operate on alternating current with a voltage of 220/380 V are not included in the design of hybrid vehicles and do not provide the necessary reserve of electrical power for the operation of additional equipment. In the event that the required power for supplying such additional consumers with 220/380 V AC is high and approaches the maximum power provided by the generator set on the vehicle, the conversion of the high-power direct current available on board the hybrid vehicle into single-phase or three-phase alternating current will be associated with the need to use a powerful AC/DC converter as part of the hybrid power plant, which requires a special