JPH07161384A - Charging method of electric vehicle - Google Patents

Abstract

PURPOSE:To complete charging work by the planned time of use by sending out the information that charging is stopped in the middle of the charging period at the time except the time when stopping information of preset charging is not sent out. CONSTITUTION:A timer is built in a charging operation panel 5 to set charging start time and to set charging period. The panel 5 can display the charging stop information when charging is stopped. The charging stop information contains at least the information of the fact that charging is stopped and the information of the cause which shows the abnormal site. Using the time, the panel 5 can set the time during which charging is not stopped. When an abnormality occurs during the charging, based on the program to operate a microcomputer built in a charing ECU 4, the charging stop information is sent to a receiver 10 through a signal sending apparatus 6. Once the time during which charging stop information is not sent is set, since the timing to send the information that charging is stopped in the middle of the charging time is set except the set charging stop information sending time, the signal can be sent by the time of use based on the timer setting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of charging an electric vehicle, and more particularly to a method of outputting charge stop information when charging of an on-vehicle battery of the electric vehicle is stopped.

[0002]

2. Description of the Related Art In order to efficiently use a charging voltage charged in an on-vehicle battery of an electric vehicle, it is desirable to complete charging just before using the electric vehicle. Generally, when an electric vehicle is not used, charging is performed during the night when the user sleeps.

In the on-vehicle battery, the charging voltage is 100 to 400 V in direct current and more than 100 A in current. Therefore, the charging device of the electric vehicle and the in-vehicle system are ignited,
A safety device and a safety circuit to prevent electric shock are installed, and when an abnormality occurs during charging, charging is automatically stopped. That is, when an abnormality occurs during the night when the user is sleeping, charging can be stopped and an accident can be prevented. The safety device is normally fail-safe, and a device having a mechanism of stopping charging midway when an abnormality occurs is often used.

However, when the on-vehicle battery is fully charged, the traveling distance is as short as 100 km. Therefore, the charging is stopped in the middle of the night, and unless the user notices the fact that the charging is stopped until the morning, the use of the electric vehicle is restricted.

[0005] Therefore, Japanese Utility Model Laid-Open No. 3-3142 discloses a device for a charging warning device which gives a warning to the user when charging is stopped.

[0006]

However, the following points have not been taken into consideration in the invention disclosed above.

First, when charging is stopped during the night when the user is sleeping, an alarm is issued regardless of the sleeping condition of the user, so that the user's sleep is disturbed.

Secondly, only an alarm is issued when the charging is stopped, and it is unclear whether the electric vehicle can be fully charged by the scheduled use time when the charging is performed again.

[0009] The present invention has been made to solve the above-mentioned problems, and sets a time when the charging stop information is not output in advance, and sets a time other than the time set when the charging is stopped. An object of the present invention is to provide a charging method for an electric vehicle that outputs charging stop information.

Further, the present invention achieves the above objects,
An object of the present invention is to provide a charging method for an electric vehicle that advances the charging speed and outputs charging stop information within a range in which the charging can be completed by the scheduled use time of the electric vehicle even when the charging is stopped.

[0011]

In order to achieve such an object, the invention according to claim 1 provides a charging method for an electric vehicle which outputs charge stop information when charging of an on-vehicle battery is stopped halfway. , Setting the charging time zone, setting a time during which the charging stop information is not output in the charging time zone, and when charging is stopped in the middle of the charging time zone, And a step of outputting the charging stop information other than the set time when the charging stop information is not output.

[0012] According to a second aspect of the present invention, in a charging method for an electric vehicle that outputs charging stop information when charging of a vehicle-mounted battery is stopped halfway, the charging time zone is set and the charging time is set. A step of setting a time during which the charging stop information is not output in the time zone, and a stop of charging at a time other than the time when the charging stop information is not output when the charging is stopped in the middle of the charging time zone. Information is output, or when the charging stop information is not output, the charging stop information is advanced by advancing to the time when charging can be completed when charging cannot be completed by normal charging or quick charging in the charging time zone. And a step.

[0013]

According to the first aspect of the present invention, when the time zone for charging the in-vehicle battery of the electric vehicle is set, the time when the charging stop information is not output is also set. When the charging is stopped in the charging time zone for some reason, the charging stop information is output at times other than the set time, and the charging stop information is not output at the set time. Therefore, for example, when the user of the electric vehicle charges at night and during sleep, the charge stop information is output at a time other than the set time even if the charge is stopped. Person's sleep is not disturbed.

According to the second aspect of the present invention, when the time zone for charging the in-vehicle battery of the electric vehicle is set, the time for not outputting the charge stop information is also set. When the charging is stopped in the charging time zone for some reason, the charging stop information is output at times other than the set time, and the charging stop information is not output at the set time. On the other hand, if the charging to the vehicle-mounted battery is insufficient if the charging is performed by normal charging or quick charging for the remaining time of the charging period after the charging stop information is output, the time to complete the charging is set. In anticipation, the set time is advanced and the charge stop information is output. Therefore, for example, when the user of the electric vehicle charges at night and during sleep, the stop information is advanced from the set time within the range where charging is completed, so that the user's sleep is secured to some extent. Yes, the charging of the in-vehicle battery can be completed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of a charging system for an electric vehicle according to the present invention, and FIG. 2 shows a block circuit.

As shown in FIG. 1, the electric vehicle 1 includes an on-vehicle battery 2, a charger 3, an electronic control unit (hereinafter referred to as a charging ECU) 4 for charging, a charging operation panel 5 and a transmitter 6.

An alternating current is supplied to the charger 3 from a power supply source such as an AC power outlet 9 of a house (indoor) 8 through a charging cable 7. The charger 3 converts an alternating current (voltage) into a direct current (voltage), and the in-vehicle battery 2 is charged with the converted direct current.

The charging ECU 4 controls the charging system. Further, the charging ECU 4 has a safety device (not shown) built therein. When an abnormality occurs in the temperature of the vehicle-mounted battery 2, the charging current, the charging voltage, the temperature of the charger 3 or the like in the charging system, the safety device controls the charger 3 to stop the charging operation. The charging current or charging voltage is detected by the ammeter 11, and the temperature of the vehicle-mounted battery 2 is detected by the thermometer 12.

The charging operation panel 5 has a timer (not shown) built therein so that the charging start time and the charging time can be set. Further, the charging operation panel 5 can display (output) charging stop information when charging is stopped. The charge stop information includes at least information on the fact that the charge has been stopped (abnormal stop information) and information indicating an abnormal place causing the stop of the charge (abnormal part information).
Further, in the charging operation panel 5, the timer can be used to set the time (output time) when the charging stop information is not output. If an abnormality occurs during charging,
Although not shown, the charging stop information is sent to the receiver 10 through the transmitter 6 based on a program for operating the microcomputer built in the charging ECU 4. When the time when the charge stop information is not output is set, the charge stop information is transmitted at times other than the set time. A user of the electric vehicle in the house 8 can know the charging stop information through the receiver 10.

The flow of outputting the above-mentioned charge stop information will be briefly described with reference to the block diagram shown in FIG.

First, charging is started in the on-vehicle battery 2 of the electric vehicle. After the charging is started, when the charging ECU 4 detects any abnormality in the vehicle-mounted battery 2, the charger 3, the charging cable 7, or the like, the charging ECU 4 outputs a charging stop command to the charger 3. The charger 3 stops charging based on the charging stop command.

When the floating charging method (constant voltage method) is adopted as the charging method, whether a plurality of cells of the vehicle-mounted battery 2 are short-circuited due to mechanical deterioration or chemical deterioration,
Alternatively, when the battery voltage deteriorates, the charging current increases and overcharge occurs. Charging is stopped when this charging current exceeds a predetermined value. Further, since the temperature of the vehicle-mounted battery 2 rises when it is overcharged, the charging is stopped when this temperature exceeds a predetermined value.

Before and after the charging is stopped, the charging EC
U4 is charging stop information (abnormal stop information and abnormal part information)
Is output to the charging operation panel 5. Basically, the charge stop information is displayed on the charge operation panel 5, but the charge stop information is transmitted through the transmitter 6 according to the setting of the user or automatically. The transmitted charge stop information is received by the receiver 10 and the user of the electric vehicle is informed of the fact of the charge stop.

When the time during which the charging stop information is not output is set in advance, the time of the timer of the charging operation panel 5 is compared with the time when charging is stopped due to an abnormality, and when it is the set time, the charging stop information is set. Is not sent. This charge stop information is output at times other than the set time. That is, when the user charges the battery during the night when he / she sleeps, the user can be notified of the fact that the charging has been stopped the morning after the user has secured sufficient sleep.

Further, even when the time when the charge stop information is not output is preset, the charge stop information is output by advancing the set time. This is because the cause of the stop is confirmed from the time when the abnormality occurs and the charging is stopped to the scheduled use time, and even if repair and recharging or quick charging is performed, full charging or obtaining a predetermined mileage is completed. If not done. At least, for example, the total time including the time required to complete the charge by the scheduled use time when the battery is recharged during the time required for checking the cause of the stop, the repair, etc. is set as the advance time.

The receiver 10 is equipped with a warning alarm such as a buzzer, a bell or the like, a visual warning such as light emission or character display, or both of them, and the charging stop information is provided to the user. I can inform you.

Next, the above-mentioned charging control method and charging stop information output control method will be described using the control flow shown in FIG.

First, a program for performing charge control and output control of charge stop information is stored in advance in an internal memory or an external memory of the microcomputer of the charge ECU 4.
The storage operation of this program is performed on the charging operation panel 5. Then, the stored program is started (20).

When the program is started, it waits until the charging cable 7 is connected to the AC power outlet 9 (21). This connection is made manually by the user.
Since voltage is applied to the charger 3 when the charging cable 7 is connected to the AC power outlet 9, this voltage is detected by the charger 3.

When it is confirmed that the charging cable 7 is connected to the AC power outlet 9, it waits until the timer built in the charging operation panel 5 is set (22).
The timer is set with the end time of charging, the start time of the time period in which the charge stop information is not output, and the end time of the time period in which the charge stop information is not output. The end time of charging is the scheduled use time or the time immediately before use. The start time of the time zone in which the charging stop information is not output is the start time (time A) of the time zone when the user does not want to issue a warning. The end time of the time period in which the charge stop information is not output is the end time (time B) of the time period when it is not desired to issue the warning. Although part of the program is omitted, when these times are set, the numerical values required during the program are calculated and stored. The information that is calculated and stored includes at least the charging start time. The charging start time is calculated from the required charging voltage value calculated from the charging voltage value of the vehicle-mounted battery 2 before charging, the amount of charged electricity per unit time, and the preset scheduled use time. Then, the charging operation panel 5 waits for confirmation to proceed to the next stage (23).

When the charging start operation is performed from the charging operation panel 5, the charging is not started until the charging start time calculated and stored in advance is waited (24). Then, at the charging start time (24), charging of the onboard battery 2 is started (25).

During this charging, the charging current is measured by the ammeter 11 (26), and when no abnormality is detected, charging is performed until the charging end time (charging is completed) (27).

When charging is completed, the charging ECU 4 outputs a charging stop command to the charger 3, and charging of the on-vehicle battery 2 is stopped (28). Then, it is displayed on the charging operation panel 5 that the charging is normally performed and ended (29), and a series of programs for charging control is ended (30).

Here, after the start of charging (25), when an abnormality occurs in the charging current (26), the output control program of the charge stop information added to the charge control program (from step (31)) Is activated.

First, the charging of the vehicle-mounted battery 2 is stopped (31), and then the time before and after the preset time A is judged (32). Before time A, that is, in the case of falling within the range of “output time of charging stop information”, the charging stop information is output from the transmitter 6 to the receiver 10, and the user is informed of the fact that charging is stopped. It After this, the program ends (35).

If it is after the time A, it is judged before and after the time B (33). After time B, that is, in the case of falling within the range of “output time of charging stop information”, similarly, the charging stop information is output from the transmitter 6 to the receiver 10 and the charging is stopped by the user. Will be informed. After this, the program ends (35).

Further, before time B, that is, between time A and time B, since it corresponds to the range of "time when charge stop information is not output", the charge stop information is not output and the process waits.

The charging control method and the charging stop information output control method described above allow the user of the electric vehicle to know the fact that charging has stopped, so the user confirms the abnormal portion and recharges. Etc. can be dealt with.
Since the charging must be completed by the scheduled use time, the recharging is performed by rapid charging, that is, charging in which a charging current larger than usual is passed to shorten the charging time. However, since rapid charging shortens the life of the vehicle-mounted battery 2, it is performed only as an emergency measure.

By the way, the above-mentioned safety device is often designed assuming the worst state, and even if it can be easily repaired, charging may be stopped. For example, it is conceivable that the user is notified of the charge stop information immediately before the scheduled use time, and the user may immediately repair and recharge the battery, but the scheduled use time may not be reached in time. In this case, the output control method of the charge stop information after step A shown in FIG. 4 is replaced with the output control method of the charge stop information after B shown in FIG.

In the method of controlling the output of the charging stop information shown in FIG. 5, the step of calculating the time required for charging between the step of charging stop (31) and the step of judging time A (32) ( 36) is added. First, when charging is stopped (31), the required charging time and the available charging time are calculated. The required charging time is obtained from the required charging amount of electricity calculated from the charging voltage value of the vehicle-mounted battery 2 until the charging is stopped, and the charging amount of electricity charged per unit time. The chargeable time is obtained from the time remaining from the time when charging is stopped to the scheduled use time. When these times are obtained, it is determined whether the time required for charging plus the repair time is longer than the chargeable time (3
6). The repair time is set as the time required to check the cause of a simple charge stop and the time to start charging again.
For example, 30 minutes is set.

When the required charging time is longer than the chargeable time, the charge stop information is immediately output and the output time of the charge stop information is advanced. On the contrary, when the required charging time is shorter than the chargeable time, the program after step (32) is performed as in the output control method of the charging stop information.

FIG. 6 shows an example of charging control and output control of charging stop information on a time axis. First, at 19:00, the operations from step (20) to step (23) are performed.
Scheduled use time is 7:00 minutes tomorrow morning, time A is 23:00
Minutes and time B are set at 5:00 minutes tomorrow morning. By inputting these times, the charging start time is calculated, for example, at 22:00, and this charging start time is stored.

Then, when charging is started, but the charging current exceeds a predetermined value and an abnormality occurs, according to the output control method of the charging stop information explained at the beginning, before 23:00 (time A). Alternatively, if it is after 5:00 minutes (time B), the charge stop information is immediately output. Also, if it is between 23:00 and 5:00 minutes tomorrow, the charging stop information is output at the time when it stands by until 5:00 minutes tomorrow. Therefore, the sleep of the user is not disturbed from 23:00 to 5:00 tomorrow.

Further, according to the output control method of the charge stop information described later, for example, when the charge is stopped at 1:00 minutes in the middle of the night, the charge stop information is not immediately output and the time required for the quick charge is increased. In anticipation, the charge stop information is output, for example, at 4:00. In this case, the sleep of the user is not disturbed at least between 23:00 and 4:00 tomorrow.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made without departing from the scope of the invention.

For example, in the present invention, the method of outputting the charging stop information may be changed to the wireless method and the wired method may be used. The present invention may also output the charge stop information through a mobile phone. Furthermore, in the present invention, the role of the charging operation panel 5 may be substituted by the charging ECU 4.

[0048]

As described above, according to the present invention,
It is possible to provide a charging method for an electric vehicle that presets a time when the charging stop information is not output and outputs the stop information at the set time when the charging is stopped.

Further, according to the present invention, there is provided a charging method for an electric vehicle, which advances the set time within a range in which the charging can be completed by the scheduled use time of the electric vehicle when the charging is stopped and outputs the stop information. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic configuration showing a charging system for an electric vehicle according to the present invention.

FIG. 2 is a block circuit of the charging system.

FIG. 3 is a block diagram showing a flow of output of charge stop information.

FIG. 4 is a control flow diagram showing a charging control method and an output control method of charging stop information.

FIG. 5 is a control flow chart showing a modified example of the output control method of the charging stop information.

FIG. 6 is a diagram illustrating an example of a charge control method and a charge stop information output control method.

[Explanation of symbols]

 1 electric vehicle 2 vehicle-mounted battery 3 charger 4 charging ECU 5 charging operation panel 6 transmitter 10 receiver

Claims (2)

[Claims] 1. A charging method for an electric vehicle that outputs charging stop information when charging of an on-vehicle battery is stopped halfway, wherein the charging time zone is set and the charging time is set within the charging time zone. Setting a time for which stop information is not output, and, when charging is stopped in the middle of the charging time period, outputting charge stop information other than the time for which the set charge stop information is not output, A charging method for an electric vehicle, comprising: 2. A charging method for an electric vehicle, which outputs charging stop information when charging of an on-vehicle battery is stopped halfway, wherein the charging time zone is set, and the charging time is set within the charging time zone. Setting a time for not outputting stop information, when charging is stopped in the middle of the charging time period, outputs stop information for charging at a time other than the time for not outputting stop information for charging, or When the charging stop information is not output, when the charging cannot be completed by normal charging or quick charging in the charging time zone, the charging is advanced to a time at which the charging can be completed and the charging stop information is output. Characteristic electric vehicle charging method.