A hybrid electric vehicle power source power limiting method

A hybrid electric vehicle and power source technology, applied in hybrid electric vehicles, motor vehicles, transportation and packaging, etc., can solve the problems of not giving a clear limit method for battery motor power, and not formulating a limit method for battery charge and discharge power, etc. To achieve the effect of ensuring power, fuel economy and improving service life

Inactive Publication Date: 2020-04-24
JILIN UNIV
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Problems solved by technology

However, it only considers the situation when the battery communication fails, and has not formulated a method for limiting the charging and discharging power of the battery when the battery is used in severe conditions.
[0005] In the patent "Method and System for Changing Operation Mode when Battery Discharge of Hybrid Electric Vehicle is Limited" (authorized announcement number is CN104228816), a method for controlling engine operation mode change when battery discharge is limited is disclosed. And when the battery discharge is limited, determine whether to change the engine operating mode, but does not give a clear method for limiting the power of the battery motor

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  • A hybrid electric vehicle power source power limiting method
  • A hybrid electric vehicle power source power limiting method
  • A hybrid electric vehicle power source power limiting method

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] A hybrid electric vehicle power source power limiting method mainly includes the following steps:

[0045] The first step is to calculate the upper and lower limits of the output power of the power battery at the current moment,

[0046] 1.1: Collect battery maximum temperature signal, battery state of charge, battery overvoltage signal, battery overtemperature signal, battery bus voltage signal, battery fault signal, vehicle controller fault signal, motor fault signal;

[0047] 1.2: Calculate the maximum discharge current of the power battery at the current moment, specifically:

[0048] If the maximum temperature of the battery at the current moment is greater than 80°C or less than -15°C, or the state of charge of the battery is less than 4%, or the battery is overvoltage, the maximum discharge current of the power battery is zero; i...

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Abstract

The invention discloses a hybrid electric vehicle power source power limiting method, belonging to the technical field of hybrid electric vehicle control. The method comprisesdetermining the upper andlower limits of battery output power and determining the upper and lower limits of motor output torque. The method takesthebattery, conditions of use of electric machines, fault state and its own characteristics for battery charging and discharging power, the output torque limit of the motor into account, whichcan effectively prolong the battery, the service life of the motor and improve the safety of the battery and the motor in the process of use, and at the same time output the larger power as far as possible to ensure the power and fuel economy, which is very important for the safety of passengers and vehicle components in the process of driving.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle energy management, in particular to a method for managing the power limit of a power battery and the torque limit of a motor. Background technique [0002] In the era of global energy shortage and growing awareness of environmental protection, traditional internal combustion engine vehicles can no longer meet the requirements of the current era due to their high pollution and high energy consumption, and the development of energy-saving and new energy vehicles is imminent. Due to the technical limitations of pure electric vehicle battery driving range and energy density in new energy vehicles, hybrid vehicles have become the mainstream of clean energy vehicles. [0003] A hybrid vehicle is composed of multiple energy sources, and multiple energy sources and various components of the power system cooperate with each other to achieve different working modes to meet the needs of drive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/13B60W20/50
CPCB60W20/13B60W20/50
Inventor 曾小华王星琦庄晓王秀鹏崔皓勇刘通云千芮孙楚琪
Owner JILIN UNIV
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