CN113147405B

CN113147405B - Automatic high-voltage recovery power-on control method for electric automobile

Info

Publication number: CN113147405B
Application number: CN202110454417.5A
Authority: CN
Inventors: 陈瑞青; 袁广升; 朱鹏; 耿名见
Original assignee: Tianjin Senpujie Electronics Co ltd
Current assignee: Tianjin Senpujie Electronics Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2023-07-25
Anticipated expiration: 2041-04-26
Also published as: CN113147405A

Abstract

The invention provides an electric automobile automatic recovery high-voltage power-on control method, which comprises the following steps: collecting fault signals, namely, inspecting the running states of all functional modules of the whole vehicle in running, and sending the fault signals in running to a whole Vehicle Controller (VCU); judging the fault grade, wherein the Vehicle Control Unit (VCU) judges the fault grade through the received fault signal, and the fault grade is classified into three-level serious faults, medium-level faults and general faults; and after the whole Vehicle Controller (VCU) judges that the fault signal level of each functional module is a general fault, judging whether a power-on request is sent by mistake or not by sequentially carrying out key (PEPS), battery Management System (BMS) and Motor Controller (MCU), if so, respectively carrying out request clearing and information saving, and outputting a power-on restoration instruction command by the whole Vehicle Controller (VCU).

Description

Automatic high-voltage recovery power-on control method for electric automobile

Technical Field

The embodiment of the invention relates to the technical field of power-on control, in particular to an automatic recovery high-voltage power-on control method for an electric automobile.

Background

The electric automobile has the characteristics of zero emission, low noise and simple structure, and has great significance in the fields of energy, environment and the like. The electric automobile comprises a hybrid electric automobile and a pure electric automobile, and the electric automobile is provided with a set of high-voltage system, and comprises a battery, a high-voltage distribution box, a driving motor, an air conditioner, PTC heating, DCDC and other parts. The voltage of the high-voltage system is up to hundreds of volts, the working current is up to hundreds of amperes, and once short circuit or insulation fault, such as insulation fault, battery short circuit fault and the like, the safety of passengers is inevitably endangered, so that the high-voltage system needs to be effectively managed, and the safety of vehicles and personnel is ensured.

In an electric automobile, a Vehicle Control Unit (VCU) is used for managing a high-voltage system, and the vehicle control unit is responsible for key functions such as power on and power off control, driving decision control, fault information processing, energy management and the like of the automobile. The power up and down process involves a plurality of devices such as a Motor Controller (MCU), a Battery Management System (BMS), high voltage accessories, keys (PEPS), pedals, gears, etc.

At present, when a certain process fails, the fault grade is judged first, and then the VCU controls whether power is on or off according to the fault grade. In the actual running process of the electric automobile, if the power-down behavior occurs under the general fault level, the power-down behavior is likely to cause stopping and driving interruption behavior, driving comfort is reduced, traffic accidents are likely to be caused, and safety of the automobile and personnel on the automobile is endangered.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a method for automatically recovering high-voltage power-on control of an electric automobile, so that the driving interruption caused by mistakenly powering down high-voltage electricity is solved.

The technical scheme of the invention is as follows: an electric automobile automatic recovery high-voltage power-on control method comprises the following steps:

collecting fault signals, namely, inspecting the running states of all functional modules of the whole vehicle in running, and sending the fault signals in running to a whole Vehicle Controller (VCU);

judging the fault grade, wherein the Vehicle Control Unit (VCU) judges the fault grade through the received fault signal, and the fault grade is classified into three-level serious faults, medium-level faults and general faults;

and after the whole Vehicle Controller (VCU) judges that the fault signal level of each functional module is a general fault, judging whether a power-on request is sent by mistake or not by sequentially carrying out key (PEPS), battery Management System (BMS) and Motor Controller (MCU), if so, respectively carrying out request clearing and information saving, and outputting a power-on restoration instruction command by the whole Vehicle Controller (VCU).

Further, in the step of collecting the fault signal, the collected fault signal information is also stored.

Further, the Vehicle Control Unit (VCU) outputs corresponding power-on and power-off control according to the obtained accident level, and if the fault level is judged to be three-level serious fault or moderate fault, the Vehicle Control Unit (VCU) outputs a power-off indication command to disconnect a control contactor of the Motor Control Unit (MCU) and the Battery Management System (BMS).

In the method for automatically recovering high-voltage power-on control of the electric automobile provided by the embodiment of the invention, the following technical effects are realized:

(1) The fault signal acquisition and fault information storage are used for storing the fault information of false alarm, so that the false alarm information can be conveniently analyzed and counted in the future, the power-on and power-off logic can be optimized, and the reliability of the electric automobile can be improved.

(2) And (5) fault grade classification and judgment. The faults sent by the functional modules are classified, different operations are executed according to different grades, and the actual use conditions are more met.

(3) And the power-down operation caused by false alarm is recovered, so that the driving is more coherent and smoother, and the reliability of the electric automobile is also improved.

It should be understood that what is described in this summary is not intended to limit the critical or essential features of the embodiments of the disclosure nor to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

fig. 1 is a logic block diagram of a method for automatically recovering high-voltage power-on control of an electric automobile.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to be within the scope of this disclosure.

In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

An embodiment of the present invention provides a method for automatically recovering high-voltage power-on control of an electric automobile, which includes the following steps:

collecting fault signals, namely, inspecting the running states of all functional modules of the whole vehicle in running, wherein all functional modules collect the fault signals in real time and send the fault signals to a whole Vehicle Controller (VCU);

It should be noted that, when judging whether to send the power-down request by mistake, the key (PEPS), the Battery Management System (BMS) and the Motor Controller (MCU) can also perform fault judgment on other parts to judge whether to send the power-down request.

In some embodiments, in the step of collecting fault signals, the collected fault signal information is also stored so as to perform data statistics on the vehicle faults.

In some embodiments, the Vehicle Controller (VCU) outputs a corresponding power-on/power-off control according to the obtained accident level, and if the fault level is determined to be a three-level serious fault or a moderate fault, the Vehicle Controller (VCU) outputs a power-off instruction command to disconnect the control contactors of the Motor Controller (MCU) and the Battery Management System (BMS).

In the description of the present specification, the terms "connected," "mounted," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present specification, the terms "one embodiment," "some embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electric automobile automatic recovery high-voltage power-on control method is characterized by comprising the following steps of:

2. The method for automatically recovering high-voltage power-on control of an electric automobile according to claim 1, wherein in the step of collecting the fault signal, the collected fault signal information is also stored.

3. The method for automatically recovering high-voltage power-on control of an electric automobile according to claim 1, wherein the whole Vehicle Controller (VCU) outputs corresponding power-on and power-off control according to the obtained accident level, and if the fault level is judged to be three-level serious fault or moderate fault, the whole Vehicle Controller (VCU) outputs a power-off instruction command to disconnect control contactors of a Motor Controller (MCU) and a Battery Management System (BMS) respectively.