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A low-voltage type range-extended electric vehicle range extender control system and an energy management method

A technology for electric vehicles and control systems, which is applied in the direction of electric vehicles, motor vehicles, and vehicle energy storage. It can solve the problems of rising costs, increasing the number of battery cells connected in series, and large volume, so as to reduce fuel consumption and energy use costs. Effect of improving fuel economy and optimizing distribution ratio

Inactive Publication Date: 2019-05-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the power system of extended-range electric vehicles is mainly high-voltage, and the DC bus voltage is mostly around 300V. High voltage will bring two biggest problems, safety and difficulty in designing electrical components; products higher than 48V require additional Electrical safety certification; electrical and electronic design of high-voltage circuits is also a big difficulty; electronic components have withstand voltage levels, and to achieve higher withstand voltage often means that electrical components require higher costs and larger volumes; Moreover, high voltage inevitably requires an increase in the number of battery cells connected in series, and the battery management system is more complicated, which also causes a significant increase in cost

Method used

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  • A low-voltage type range-extended electric vehicle range extender control system and an energy management method
  • A low-voltage type range-extended electric vehicle range extender control system and an energy management method
  • A low-voltage type range-extended electric vehicle range extender control system and an energy management method

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Embodiment 1

[0030] A low-voltage range-extended electric vehicle range extender control system, which consists of: an engine 1, the engine is connected to the starter generator 2 through a connecting shaft, and the starter generator is connected to the starter generator through an AC power cable 3 The controller 4 is connected, and the starter generator controller is respectively connected with the DC converter 6 and the drive motor controller 12 through the DC power cable 5, and the drive motor controller is connected with the drive motor 11 through a wire, and the described The drive motor is connected to the gearbox 10 through the connecting shaft, and the gearbox is connected to the two wheels 8 through the transmission shaft 9 respectively.

Embodiment 2

[0032] According to the low-voltage range-extending electric vehicle range extender control system described in Embodiment 1, the DC converters are respectively connected to a set of power battery packs 7 through wires, and the driving motors are connected in series with double low-voltage motors.

Embodiment 3

[0034] According to the low-voltage type extended range electric vehicle range extender control system described in embodiment 2, when the engine is started, the starter generator controller controls the starter generator to work in the electric state to start the engine, and the engine starts Afterwards, the starter generator turns into the power generation state, and the starter generator controller converts the three-phase AC into DC power to supply power to the main drive motor, and at the same time charges the power battery pack through the DC converter;

[0035]The low-voltage range extender is the auxiliary power generation unit of the vehicle power system. It is composed of an engine, a starter generator, and a starter generator controller. The engine is the power source of the auxiliary power unit and is also a chemical energy / mechanical energy conversion unit. Power generation integrated motor, range extender adopts starter and power generation integrated motor, which...

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Abstract

The invention discloses a low-voltage type range-extended electric vehicle range extender control system and an energy management method. A power system of an existing extended-range electric vehiclemainly adopts high voltage, so the design difficulty of electric parts is increased, the number of battery cells connected in series is increased, and battery management is more complex. The composition of the system comprises an engine (1), wherein the engine is connected with a starting generator (2) through a connecting shaft, the starting generator is connected with a starting generator controller (4) through an alternating current power cable (3); the starting generator controller is connected with a direct current converter (6) and a driving motor controller (12) respectively through a direct current power cable (5), wherein the driving motor controller (12) is connected with a driving motor (11) through a wire; the driving motor is connected with a gearbox (10) through a connectingshaft, and the gearbox is respectively connected with two wheels (8) through a transmission shaft (9). The method is used for the low-voltage type range-extended electric vehicle range extender control system.

Description

Technical field: [0001] The invention relates to energy management of an electric vehicle, in particular to a control system and an energy management method for a low-voltage range-extending electric vehicle range extender. Background technique: [0002] Among new energy vehicles, pure electric vehicles directly store and utilize electric energy. The structure of the power system is simple. At the same time, it has the advantages of high mechanical efficiency of the transmission system and high recovery and utilization of braking energy. However, at this stage, power battery technology and charging equipment Restricted by factors such as distribution, the disadvantages of pure electric vehicles are mainly manifested in: 1. The pure electric mileage is short, which cannot meet the needs of drivers for travel; The time is longer; these are caused by the low energy density of the power battery and the small charging rate; due to these shortcomings, the driver's acceptance of pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L50/62B60W20/11
CPCY02T10/62Y02T10/70
Inventor 周凯艾民吴晓刚刘金凤金宁治耿新
Owner HARBIN UNIV OF SCI & TECH
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