Hybrid electric vehicle and power system thereof

A technology of hybrid electric vehicles and power systems, applied in hybrid electric vehicles, electric vehicles, motor vehicles, etc., can solve the problems of large loss and uncontrollable voltage, so as to improve the performance of the whole vehicle, ensure normal operation, and maintain low-speed electrical balance and the effect of low-speed smoothness

Pending Publication Date: 2018-10-16
BYD CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

If the brake rectification method is used, once the power battery is disconnected, the output voltag

Method used

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  • Hybrid electric vehicle and power system thereof
  • Hybrid electric vehicle and power system thereof
  • Hybrid electric vehicle and power system thereof

Examples

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Example Embodiment

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] The following describes the power system of the hybrid electric vehicle and the hybrid electric vehicle according to the embodiments of the present invention with reference to the accompanying drawings.

[0022] figure 1 It is a structural block diagram of a power system of a hybrid electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the power system of the hybrid electric vehicle includes: an engine 1, a power motor 2, a power battery 3, a DC-DC conve...

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Abstract

The invention discloses a hybrid electric vehicle and a power system thereof. The power system includes an engine, a power motor, a power battery, a DC-DC converter, an auxiliary motor and a voltage regulator circuit. The engine outputs power to wheels of the hybrid electric vehicle through a clutch. The power motor outputs driving force to the wheels of the hybrid electric vehicle. The power battery supplies power for the power motor. The auxiliary motor is connected to the engine, the power motor, the DC-DC converter and the power battery separately. The voltage regulator circuit is connected between the auxiliary motor and the DC-DC converter, and the direct current outputted to the DC-DC converter during power generation of the auxiliary motor is subjected to voltage regulating treatment by the voltage regulator circuit, the low-speed electric balance and low-speed smoothness of the whole vehicle can be maintained, and the input voltage of the DC-DC converter can be stabilized to ensure that the DC-DC converter works normally.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a power system of a hybrid electric vehicle and a hybrid electric vehicle. Background technique [0002] In a hybrid electric vehicle, the voltage output by the motor is rectified by the inverter to charge the power battery. At this time, the output voltage of the inverter is not controlled, but because the output terminal is connected in parallel with the power battery, the power battery is equivalent to a huge The capacitive load can stabilize the voltage on the main circuit, so that the impact on the subsequent DC-DC converter is very small. Moreover, the high voltage can be directly stepped down to a low voltage such as 12V through a DC-DC converter to supply power to the low-voltage electrical appliances of the vehicle. [0003] But once the power battery is disconnected, the voltage output by the motor will be uncontrollable, so the voltage output by the m...

Claims

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Application Information

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IPC IPC(8): B60L11/12B60L11/14B60L1/00B60L50/10B60L50/15B60L50/16
CPCB60L50/61B60L50/16B60L1/00B60L2210/10B60L50/10B60L50/15B60K6/448Y02T10/62Y02T10/7072Y02T10/70B60K6/48B60K6/52B60K6/485
Inventor 王春生李凯琦张伟
Owner BYD CO LTD
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