WO2008143355A1

WO2008143355A1 - Electric vehicle

Info

Publication number: WO2008143355A1
Application number: PCT/JP2008/059608
Authority: WO
Inventors: Satoru Matsumoto
Original assignee: Toyota Jidosha Kabushiki Kaisha
Priority date: 2007-05-21
Filing date: 2008-05-20
Publication date: 2008-11-27
Also published as: JP2008289307A

Abstract

Provided is an electric vehicle which travels by using electric power of a battery (18) to drive a second motor generator (12). Moreover, the battery (18) is charged by power from an external power source by using an external charge interface. A diagnosis execution unit (22) executes a function diagnosis of respective components mounted on the electric vehicle and displays diagnosis results on a display unit (24). Among the diagnosis results obtained by the diagnosis execution unit (22), the diagnosis result of the battery charge function is displayed separately from the other diagnosis results.

Description

Description Electric car (Technical field)

The present invention relates to a function diagnosis (diagnosis) in an electric vehicle that drives a motor vehicle by using battery power.

(Background technology)

Some vehicles, such as automobiles, have a diagnosis system that diagnoses the functions of various devices installed, and the results of the function diagnosis (diagnosis results) are displayed. Japanese Patent Application Laid-Open No. 2 00 0-9 9 2 0 4 discloses that various function diagnoses including a charging function are performed and the results are displayed on one display unit. Further, the execution and display of the function diagnosis in the vehicle are also described in Japanese Patent Laid-Open Nos. 2 0 0 5-2 5 5 1 5 8 and 1 1-1 2 2 8 26.

Here, various devices are installed in the vehicle, and there are various types of results of the function diagnosis. Therefore, efficient processing of functional diagnosis and output is desired.

(Disclosure of Invention)

The present invention relates to an electric vehicle that travels by driving a motor vehicle using electric power of a battery, the function diagnosing means for performing a function diagnosis of each part mounted on the electric vehicle, and the implementation by the function diagnosing means Display means for displaying a result, wherein the display means displays a function diagnosis execution result of the battery charging function among the function diagnosis execution results executed by the function diagnosis means, and performs a function diagnosis other than the charging function. It has a dedicated display system that distinguishes it from the results.

And storage means for storing the function diagnosis execution result of the charging function performed by the function diagnosis means, and display timing determination means for determining whether or not it is a timing to display the function diagnosis execution result of the charging function. The display timing determination When it is determined that it is time to display the function diagnosis execution result of the charging function by the determining means, it is preferable to display the function diagnosis execution result of the charging function stored in the storage means on the display means It is.

In addition, it is preferable that the display timing determination unit does not display the charging function execution result during driving by determining that it is not the timing to display the function diagnosis execution result of the charging function during driving.

Furthermore, it has a charging determination means for determining whether or not the battery is being charged. When it is determined by the charging determination means that the battery is not charging, the charging function of the diagnosis performed by the function diagnosis means It is preferable to prohibit diagnosis.

In addition, there is a charging determination unit that determines whether or not the battery is being charged. When the charging determination unit determines that the battery is being charged, execution of a diagnosis other than the charging function may be prohibited. Is preferred.

In addition, it has a charging determination unit that determines whether or not the battery is being charged. When the charging determination unit determines that the battery is not charging, the function diagnosis unit diagnoses the traveling function unit. Is preferred.

Thus, according to the present invention, the function diagnosis execution result is displayed separately from other function diagnosis execution results. Therefore, the diagnosis result for the charging function can be easily recognized. In addition, if the timing of performing the function diagnosis for the charging function is charging, the charging function can be diagnosed at an appropriate timing.

(Brief description of drawings)

FIG. 1 is a block diagram showing the overall configuration of the embodiment.

FIG. 2 is an explanatory diagram showing a display form.

FIG. 3 is an explanatory diagram showing display timing.

Fig. 4 is an explanatory diagram showing the timing of diagnosis.

FIG. 5 is an explanatory diagram showing the count state of the number of trips.

(Explanation of symbols)

1 0 1st motor generator, 1 2 2nd motor generator, 1 4 Jin, 16 Planetary Gear, 1 8 Battery, 2 0 External Charging Interface, 2 2 Diagnostics Implementation Unit, 2 4 Display Unit, 2 6 Storage Unit, 2 8 Control Unit.

(Best Mode for Carrying Out the Invention)

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a main part of an electric vehicle according to the present invention. Here, an electric vehicle is a vehicle equipped with a battery and a motor drive, and means a vehicle that runs by driving the motor drive. This embodiment also relates to a hybrid vehicle (HV) that charges the vehicle.

Planetary gears (planetary gears) 16 are connected to the output shafts of the first motor generator 10, the second motor generator 12, and the engine 14. This planetary gear 16 transmits the two output torques of the second motor generator 12 and the engine 14 to the wheels to cause the vehicle to travel, and the first motor generator 10 generates electric power. For example, the first motor generator 10 is connected to the sun gear of the planetary gear 1 6, the engine 14 is connected to the carrier, the second motor generator 1 2 is connected to the ring gear, and the driving force of the second motor generator 1 2 or the engine 1 The drive force of 4 is transmitted to the drive system via the planetary gear 16. Further, power is generated by the first motor generator 10 by the driving force of the engine 14. Power generation by regenerative operation is also performed by the second motor generator 12. The configuration of the HV is not limited to this configuration, and a known system such as a system with a single generator or a series type can be appropriately employed.

The first and second generators 10 and 12 are connected to a battery 18, driven by the power of the battery 18, and charged with the generated power.

An external charging interface 20 is connected to the battery 18. The external charging interface 20 has a built-in rectifier and can be connected to a commercial power source, and charges the battery 18 with power from the commercial power source. The commercial power supply Either AC 1 00 V or AC 2 0 0 V may be used. A power supply using a generator or the like may be used instead of a commercial power supply.

Further, the vehicle of the present embodiment has a diagnosis execution unit 22. The diagnosis execution unit 22 performs functional diagnosis of various devices mounted on the vehicle based on information from a plurality of on-board control com- panies and sensors. In other words, various devices are provided with a control computer for controlling the devices, and the control computer controls the devices according to outputs from various sensors. There are also sensors directly attached to equipment. Therefore, the diagnosis execution unit 22 receives information on the state of the device grasped by the computer and information on the output of the sensor, and performs functional diagnosis of various devices based on the received information.

In particular, the battery 18, battery cooling fan, external charging interface 20, etc. are diagnosed as the charging function part. For example, for battery 1 8, output of voltmeter for detecting battery voltage, ammeter for detecting battery charge / discharge current, integrating current detector for integrating current value, battery thermometer, etc.

Diagnose by 2. In the external charging interface ₂₀ , the diagnosis execution unit 22 diagnoses the output of the voltmeter for detecting the output voltage for charging after rectification and the output of the ammeter for detecting the output current for charging. The external interface 20 includes a conversion device that converts voltage and current so that the battery 18 can be charged with external power, and performs this diagnosis. In particular, during charging, the function diagnosis for the external charging interface 20 and the battery 18 is continued.

In addition, for the running system part, function diagnosis of detection output such as engine speed, motor drive current, output torque, gear ratio, brake hydraulic pressure, speed meter, fuel class is performed. Since battery 18 is also used as a driving force source, battery 18 may be a traveling system part.

A display unit 24 is connected to the diagnosis execution unit 22 and a function diagnosis result (diagnosis execution result) is appropriately displayed. In addition, the diagnosis execution unit 22 has a storage unit 26, and the storage unit 26 stores information on the diagnosis execution result. Can be displayed on the display unit 24. The control unit 28 controls the operation of each unit.

As described above, the vehicle of the present embodiment is an HV and uses a charging system that uses an external power source such as a commercial power source for charging the battery 18.

In an HV that has a charging function using such an external power source, the charging function and the driving function are basically independent. In other words, normal driving is not performed during the charging period using the external power source, while the charging system using the external power source is not used during driving. In the present embodiment, HV driving and charging using an external power source are performed at different times. That is, HV traveling is the timing when the vehicle actually travels, and charging is the timing when the vehicle stops and charges the battery. Therefore, in the present embodiment, as shown in FIG. 2, the display unit 24 displays the traveling diagnosis display and the charging diagnosis display separately separately.

In the vehicle, the display unit 24 is provided in front of the driver's seat as an instrument panel. This display unit 24 is used to display various types of data such as speed data and fuel data, but also displays the results of the diagnosis of in-vehicle devices. At this time, in the present embodiment, the HV traveling system diagnosis display of the engine 14, the first and second motor generators 10, 12, etc. operating during normal traveling, and when the vehicle is stopped It is displayed separately from the charging diagnosis display for the function of the external charging interface 20 at the time of charging performed in.

For example, the charging diagnosis display can be recognized separately from other displays by making the back a different color area or surrounding the area with a line. In this case, it is also preferable to display that the corresponding area is a charging diagnosis display. It is also preferable to display a mark or the like indicating that it is a charging system diagnosis display. For example, a plug display can be considered. If it is determined as abnormal in the result of the diagnosis of such a charging function part, the warning display is turned on. In particular, this display is set separately from the normal travel diagnosis display. Therefore, the driver From this display before charging starts, it can be determined whether charging is possible.

Thus, according to the present embodiment, the traveling diagnosis display and the charging diagnosis display are displayed separately. In other words, a dedicated display is performed for the charging diagnosis display. Therefore, the driver can recognize at a glance whether or not the charging function part has failed. It is important to recognize this immediately, since the SOC of the battery 18 will drop and the vehicle will not be able to run adequately if the charging function is broken.

In the present embodiment, the display timing of the charging system diagnosis, which is a function diagnosis for the charging function, is controlled. That is, the diagnosis execution unit 2 2 stores the diagnosis execution result regarding the charging function in the storage unit 26. Then, when it is determined that the display timing has come, the diagnosis function execution result of the charging function is displayed on the display unit 24. It is preferable that the diagnosis execution result includes not only an abnormality warning but also an indication of normality. Furthermore, it is preferable to store an abnormality detection history in the storage unit 26 so that it can be displayed as needed.

Figure 3 shows an example of the display timing for the results of charging function diagnosis. In HV vehicles, when the travel function is turned on, the “re e d y on” state (running enabled state) is set by operating the I G (ideration) switch. In HV, driving is possible even if the engine is not stopped. This r e a d y on timing is before the start of driving, and there are many requests that the driver wants to check the overall condition of the vehicle. Therefore, it is preferable to display the diagnosis result of the charging function at this timing. Next, the display is displayed when driving is finished and the driving function is turned off. Charging is performed after turning off r e a d y. For this reason, when r e a d y is off, the stage is before the start of charging. This timing display allows the user to determine whether the charging system is normal before starting charging. Therefore, when r e a d y is off, the most appropriate display timing is considered.

Also, when charging is performed and this charging is completed, diagnosis is performed. It is preferable to display the results. Even when charging is completed, it is possible to determine whether charging has been performed normally by determining whether the charging function is normal.

In addition, it is also suitable to display the diagnosis result of the charging function at the timing such as when the vehicle is in use, when the vehicle is on or off, or when the shift lever is in the parking position. It is.

From the viewpoint of preventing improper diagnosis display, it is preferable that the diagnosis display for the charging function is not performed during traveling. Further, as described above, it is preferably performed separately from the traveling diagnosis display, but it is not limited to this.

Furthermore, in the present embodiment, it is prohibited to perform diagnosis for the charging function during traveling.

That is, as shown in Fig. 4, the charging system prohibits diagnostics while driving and performs functional diagnosis during charging. On the other hand, for HV driving systems, function diagnosis is performed during driving and function diagnosis is prohibited during charging.

While the HV is running, the charging system is not in operation and is not in operation. Therefore, proper results cannot be obtained even if a function diagnosis is performed on the charging system while driving.

• In addition, the HV driving system is in a non-operational state during charging in HV vehicles. Therefore, even if the function diagnosis for the HV traveling system is performed during charging, an appropriate result cannot be obtained.

In the present embodiment, the function diagnosis for the corresponding system is performed only at the timing when an appropriate function diagnosis can be performed. For this reason, based on the fact that the corresponding system is not operating, it is possible to prevent functional diagnosis from being performed during a period of low diagnostic accuracy.

Furthermore, if the function diagnosis for the HV traveling system is performed during charging, it is erroneously detected that the HV traveling system has been operated by accessing the HV traveling system, even though it is ready off. May count as 1 trip. Therefore, as shown in Figure 5, HV during charging Depending on the function diagnosis of the driving system, the number of trips may be counted up, resulting in an incorrect number of trips. According to the present embodiment, since function diagnosis for the HV traveling system is prohibited during charging, occurrence of such a problem can be prevented.

In other words, one trip is completed when r e a d y is off, but when the function diagnosis for the subsequent HV driving system is performed, the HV driving system turns on the sensors and returns a signal about the inspection result. Therefore, the HV traveling system is once turned on, and this is counted as a trip. According to the present embodiment, such erroneous counting of the number of trips can be effectively prevented.

Further, the control unit 28 determines whether or not charging is in progress from the state of the external charging interface 20 and the state of the charging start switch. If it is determined that charging is in progress, the diagnosis executing unit 22 limits the function diagnosis to the charging function part and prohibits diagnosis to other devices. The diagnosis execution unit 22 may determine whether or not charging is in progress and switch the function diagnosis execution mode. In addition, if it is determined that the battery is not being charged, functional diagnosis is performed only for parts other than the charging function part. As a result, it is possible to perform functional diagnosis of the traveling function part while traveling, and to perform appropriate diagnosis.

Claims

1. An electric vehicle that uses a battery power to drive a motor and travels. A function diagnosis unit that performs a function diagnosis of each part mounted on the electric vehicle, and an execution result by the function diagnosis unit are displayed. Display means to

Have

The display means has a dedicated display system for displaying the function diagnosis result request for the battery charging function among the function diagnosis results executed by the function diagnosis means, separately from the function diagnosis execution result other than the charging function. Electric car having.

2. An electric vehicle according to claim 1,

In addition,

Surrounding

Storage means for storing a function diagnosis execution result of the charging function performed by the function diagnosis means;

Display timing determination means for determining whether it is a timing to display the function diagnosis execution result of the charging function;

Have

When it is determined by the display timing determination means that it is a timing to display the function diagnosis execution result of the charging function, the function diagnosis execution result of the charging function stored in the storage means is displayed on the display means. Electric car.

3. The electric vehicle according to claim 1, wherein

An electric vehicle that does not display the execution result of the charging function during traveling by determining that the display timing determining means does not indicate the timing for displaying the function diagnosis execution result of the charging function during traveling.

4. The electric vehicle according to any one of claims 1 to 3, further comprising:

Charging means for determining whether or not the battery is being charged with power supplied from an external power source;

An electric vehicle that prohibits the diagnosis of the charging function among the diagnosis performed by the function diagnosis unit when it is determined by the determination unit during charging that the charging is not being performed.

5. An electric vehicle according to any one of claims 1 to 3,

An electric vehicle that is prohibited from performing a diagnosis other than the charging function when it is determined that charging is being performed by the charging determination unit.

6. An electric vehicle according to any one of claims 1 to 3, wherein

An electric vehicle in which a diagnosis of a traveling function unit is performed by the function diagnosis unit when it is determined by the determination unit during charging that charging is not being performed.