JP3178171B2 - In-car charger display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for performing a display related to a charging operation of a vehicle-mounted charger mounted on an electric vehicle or the like.

[0002]

2. Description of the Related Art An electric vehicle is equipped with a battery as a power source. Since this battery is discharged by supplying electric power to a motor as a driving source, it is necessary to charge the battery at an appropriate frequency. As a means for charging a vehicle-mounted battery, for example, a vehicle-mounted charger can be used.

When charging a vehicle-mounted battery using a vehicle-mounted charger, there are two types of methods, night charging and emergency charging. Night charging is charging that is performed during the night when the vehicle is parked.When performing this charging, the driver or the like normally instructs the charger to start the charging operation, and then normally leaves the vehicle until the next morning. . Emergency charging refers to the use of a power supply provided near the road on which the vehicle is traveling when the user is concerned about whether or not the vehicle can reach the destination with the power remaining in the battery. It is a method of charging. In this case, the driver or the like instructs the charger to start charging, and resumes running after the charging is completed.

[0004] In any of these charging methods, it is necessary to inform a driver or the like whether or not the charging of the vehicle-mounted battery has been suitably performed. That is, it is necessary for the driver or the like to appropriately perform appropriate processing depending on whether the charging of the vehicle-mounted battery has been completed normally or abnormally. For example, 2-6
Japanese Patent No. 5048 discloses a technique for detecting a charging failure and lighting a charging failure warning lamp.

[0005]

When it is displayed whether the charging of the battery by the onboard charger has been completed normally or abnormally, power consumption occurs in the display device. In addition, in an electric vehicle, a battery (auxiliary battery) for supplying power to on-vehicle electrical accessories is mounted in addition to a battery (main battery) as a driving source of the vehicle. Power is supplied from the auxiliary battery. Therefore, if the display of the charge end / abnormal end is continued for a long period of time, a so-called auxiliary battery running-up state may occur. Such a situation may occur, for example, when the driver or the like has instructed charging at night and then left the vehicle for a long time (several days to several weeks).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a continuous display for indicating that charging of a vehicle-mounted charger has been completed normally or abnormally. The purpose is to prevent power consumption due to power.

[0007]

In order to achieve the above object, a display device of a vehicle-mounted charger according to the present invention detects that charging of a vehicle-mounted battery by a vehicle-mounted charger has been completed normally or abnormally. End detection means for performing normal termination or abnormal termination once, displaying the fact once, detecting the termination once, and then redisplaying when a display request is given. , Is provided.

[0008]

In the present invention, first, the end detecting means detects that the charging of the on-board battery by the on-board charger has been completed normally or abnormally. When the normal end or the abnormal end is detected, the end display means displays that fact. The end display means temporarily deletes the display, and then waits until a display request is given. When the display request is given, the end display means redisplays that the normal end or the abnormal end has been detected. Therefore, in the present invention, the display relating to the end of charging of the vehicle-mounted battery is temporarily interrupted, so that power consumption by the display does not occur until the redisplay is performed thereafter. Even if there is, the auxiliary battery that supplies power to the display device does not run out.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an apparatus according to a first embodiment of the present invention. The device shown in this figure gives a command to the control unit 14 in response to an operation of a vehicle-mounted charger 12 for charging the main battery 10, a control unit 14 for controlling the charger 12, a driver and the like, Conversely, a display operation panel 16 for performing a predetermined display based on a signal supplied from the control unit 14, and an auxiliary battery 18 for supplying power to a vehicle-mounted electric auxiliary device such as the control unit 14 and the display operation panel 16 are provided. I have.

When performing night charging or emergency charging of the main battery 10, a driver or the like operates a display operation panel 16 after connecting a power supply device (not shown) outside the vehicle to the charger 12 via a connector 20. An instruction is given to the control unit 14. The control unit 14 controls the charger 1 in response to this command.
2 to start charging the main battery 10 with the external power supply. The control unit 14 supplies a signal indicating that charging of the main battery 10 has been completed to the display operation panel 16, and the display operation panel 16 performs display to that effect.

The display operation panel 16 has, for example, a configuration as shown in FIG. The display operation panel 16
It is provided on a location that is easily operated by a driver or the like in the vehicle compartment, for example, on a front panel portion. Display operation panel 16
Has a power switch 22, a start switch 24, and a stop switch 26 as switches operated by a driver or the like. The power switch 22 is a switch for turning on power for charging, and the start switch 24 is a switch for starting charging. The stop switch 26 is a switch for terminating charging.

The display operation panel 16 further includes display elements 28 to 34 for indicating an execution state of charge control and a charge end state.
It has. Each of these display elements 28 to 34 can be realized by an LED, but is not limited to an LED. LED among these display elements 28 to 34
Reference numeral 28 denotes a display element for displaying that power for charging is turned on, and LED 30 is an element for displaying that charging is being performed. The LED 32 is an element for displaying that charging has been completed normally, and the LED 34 is an element for displaying that abnormal charging has been completed.

FIG. 3 shows a control unit 14 according to this embodiment.
Is shown.

The routine shown in FIG.
Is a routine that is repeatedly executed at a predetermined cycle. When executing this routine, the control unit 14 first executes a predetermined reset process (100). Control unit 14
Determines whether the power switch 22 has turned from off to on after execution of step 100 (102). Until the display operation panel 16 is operated by the user and the power switch 22 is turned on, the determination in step 102 is not established, and the operation of the control unit 14 proceeds to step 104. In step 104, it is determined whether or not the ignition switch (IGSW) has turned from off to on. If the user does not operate the IGSW and thus the determination condition of step 104 is not satisfied, the operation of the control unit 14 shifts to a routine (not shown).

Thereafter, when the user operates the power switch 22 on the display operation panel 16 to turn it on at a certain point in time, the first time the routine of FIG. 3 is executed, the determination condition of step 102 is satisfied. Therefore, the control unit 1
The operation in step 4 is performed in step 105 and the subsequent step 10
The process moves to the process of step 6. In step 105, the power supply for charging the main battery 10 using the charger 12, that is, the charging system power supply is turned on. In step 106, the display of the LED 28 on the display operation panel 16 is turned on. This allows the user to know that the charging system power supply has been connected. If the user has turned on the power switch 22 but has not yet turned on the start switch 24, the process proceeds to steps (not shown) via steps 108 and 104.

Thereafter, when the user turns on the start switch 24 at a certain point in time, this causes a step 108 to be executed.
Is satisfied. Step 108 is a judgment regarding whether or not the start switch 24 has turned from off to on. When the determination condition of step 108 is satisfied, steps 110, 112, and 114 are executed. Step 1
Reference numeral 10 denotes a process of turning on the display of the display operation panel 16 by the LED 30, and the user can know the start of the charging. Step 112 is a process for starting charging using the charger 12. Step 114
Is a step of detecting the state of charge of the main battery 10. Step 116 executed after Step 114
Is a determination of whether or not the main battery 10 is fully charged. For example, the amount of current (Ah) supplied to the main battery 10
Becomes a predetermined value, it is determined that main battery 10 is in a fully charged state. In step 116, it is further determined whether or not the charging is proceeding normally.

Immediately after the start of charging, the determination condition in step 116 is not satisfied, and the process proceeds to step 104 through a routine (not shown). When charging proceeds and the determination condition in step 116 is satisfied, that is, when the main battery 10 is fully charged or charging is abnormally terminated, steps 116 to 118 are performed.
Move to. In step 118, the control unit 14
Turns off the display by the LED 30 on the display operation panel 16. The user can know the end of charging by looking at the LED 30. The control unit 14 further sets 1 to a charging completion flag (120). The charging completion flag is a flag indicating that charging of the main battery 10 by the charger 12 has been completed normally or abnormally. The control unit 14 sets the charging completion flag to 1 and then sets the LED 32
Alternatively, the display by 34 is turned on (122). LED
Whether the LED 32 or the LED 34 is turned on is selected according to the state of charge detected in step 114. That is, when the charging of the main battery 10 is completed normally, the LED 32 is displayed.
34 is lit.

After executing step 122, the control unit 14
The counting by the ramp counter is started (124).
Until the count value of the counter becomes a predetermined value t ₁ (12
6) The process proceeds to a not-shown routine via step 104. When the counter reaches a predetermined value t ₁ above, the control unit 14, turns off the display by the LED32 or 34 (1
28), and then reset the counter (13
0). The control unit 14 further turns off the display by the LED 28 (132), and simultaneously turns off the charging system power supply (134).

Thereafter, until the user turns on the IGSW, the operation of the control section 14 executes a routine (not shown) through steps 100, 102 and 104. When the user turns on the IGSW (104), the control unit 1
No. 4 first determines whether or not 1 is set in the charging completion flag (135). If the result of this determination is that 1 has not been set in the charge completion flag, the routine proceeds to a routine not shown. If the charging completion flag is set to 1 since the main battery 10 is charged by the charger 12 first, the control unit 14 sets the LED 32 or 34 on the display operation panel 16 to the charging end state. The lamp is selectively turned on (136), and counting by the second lamp counter is started at the same time (138).

The count value of this lamp counter is a predetermined value t ₂
(140), the operation of the controller 14 branches from step 140 to a routine (not shown). When the count value of the lamp counter becomes equal to or more than the predetermined value t ₂ , the control unit 14
Turns off the display by the LED 32 or 34 (14
2) Then, the lamp counter is reset (14)
4).

The lamp counter used in the above operation can be realized as hardware built in the control unit 14 and also as a software timer. In addition, the control unit 114
In order to determine whether to turn on the LED 32 or the LED 34, information indicating whether the charging of the main battery 10 has been completed normally or abnormally is stored.

FIG. 4 shows charging and display timings in this embodiment. As shown in this figure, when the driver or the like turns on the power switch 22,
In response, the display of the LED 28 is turned on. Thereafter, when the driver or the like turns on the start switch 24, the display of the LED 30 is turned on accordingly. When the charging of the main battery 10 by the charger 12 ends normally or abnormally, the display of the LED 30 is turned off by the control unit 14 and the display of the LED 32 or 34 is turned on. This display is continued for the predetermined time t _1. Thereafter, the display of the LED 32 or 34 is turned off, and the display of the LED 28 is also turned off.

The feature of this embodiment is that the display by the LED 32 or 34 is once turned off, and the end state is displayed again by the LED 32 or 34 as the IG turns on. It is. Since this display is executed according to the sequence shown in FIG. 3, it is executed only for the first IG-on after charging is completed. That is, it is not displayed after the second time.

Therefore, according to the present embodiment, the display indicating the charging end state is temporarily interrupted, and the state is re-displayed in response to the first IG ON.
No power is consumed due to the continuation of the display, and the auxiliary battery 18 that supplies power to the display operation panel 16 and the like does not rise. In addition, drivers etc.
The operation of turning on the IG makes it possible to know the charging end state.

FIG. 5 shows the configuration of an apparatus according to a second embodiment of the present invention. The device shown in FIG.
In addition to the configuration of the first embodiment shown in FIG. 1, an SOC sensor 36 for detecting the state of charge (SOC) of the auxiliary battery 18 is further provided.

FIG. 6 shows a control unit 14 according to this embodiment.
Is shown. As shown in this figure, in this embodiment, step 146 is executed instead of steps 124 and 126 in the first embodiment. In step 112, the control unit 14
Using the OC sensor 36, the SOC of the auxiliary battery 18 is detected, and the display related to step 122 is continued only when the detected SOC exceeds the predetermined value A.

Therefore, in the present embodiment, the first
The predetermined time t ₁ is to be variably set in the embodiment. In other words, the display continuation time t ₁ immediately after the charging is completed is a time length based on the SOC of the auxiliary battery 18. Thus, in the present embodiment, the auxiliary machine because the display duration time t ₁ immediately after the completion of charging in accordance with the SOC of the battery 18 is determined, it is possible to the time t ₁ and more optimal value. It should be noted that the predetermined amount A is the auxiliary battery 1
8 needs to be set to a value considerably higher than the SOC in the state where it has risen.

In the above description, the charging end state is displayed again in response to the IG being turned on. However, this may be performed by using another signal as a trigger. If the amount indicates the state of charge of the auxiliary battery 18, S
Other amounts may be used in place of OC. Time t ₁ is preferably longer than t ₂ , and t ₂ may be about 30 seconds.

[0030]

As described above, according to the present invention,
When the charging of the on-board battery ends normally or abnormally, the fact is displayed once and then deleted, and then displayed again when a display request is given, so that the power consumption caused by the display is reduced. Will be suppressed,
Therefore, the discharge of the auxiliary battery that supplies power to the display device is suppressed. As a result, the occurrence of so-called auxiliary battery rising can be suitably suppressed, and the state of the vehicle can be suitably maintained even when the driver or the like leaves the vehicle for a long time. Further, by giving a display request by turning on the IG or the like, the driver or the like can perform the above-described redisplay, so that the charging end state can be reliably known.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of a display operation panel in the embodiment.

FIG. 3 is a flowchart showing a flow of an operation of a control unit in the embodiment.

FIG. 4 is a timing chart for explaining charge control and display operation in this embodiment.

FIG. 5 is a block diagram showing a configuration of an apparatus according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing a flow of an operation of a control unit in this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main battery 12 Charger 14 Control part 16 Display operation panel 18 Auxiliary battery 20 Connector 22 Power switch 24 Start switch 28-34 LED

Claims (1)

(57) [Claims] 1. An end detecting means for detecting that charging of a vehicle battery by an on-board charger has ended normally or abnormally, and an end displaying means for displaying, when a normal end or an abnormal end is detected, the fact. Wherein the end display means temporarily deletes the display indicating that the normal end or the abnormal end has been detected, and then redisplays the display when a display request is given. Display device for on-board charger.