JP2011182563A - Charged state display device for vehicle - Google Patents

Abstract

A vehicle state-of-charge display device capable of notifying the outside of the amount of charge of a battery while traveling is provided.
A vehicle state-of-charge display device including an ECU (7) that restricts the running performance of a vehicle (V) when a capacity (SOC) of a battery (4) mounted on the vehicle (V) is reduced to a preset remaining capacity value. The SOC indicator 2 mounted on the rear end portion of the roof panel RP that can be seen from outside the vehicle, and the ECU 7 that changes the display state of the SOC indicator 2 are provided. The ECU 7 limits the running performance of the vehicle V. The display state of the SOC indicator 2 is changed by the ECU 7.
[Selection] Figure 1

Description

  The present invention relates to a vehicular charge state display device capable of confirming the charge amount of a battery mounted on a vehicle from the outside.

  Patent Document 1 and Patent Document 2 have been proposed as techniques for checking the state of charge (remaining capacity) of a battery from the outside (outside the vehicle) of an electric vehicle or a hybrid vehicle. Patent Document 1 proposes a technique for confirming the state of charge based on the angle of the door mirror of the vehicle, and Patent Document 2 proposes a technique for confirming the state of charge based on the angle of the wiper.

Japanese Patent Laying-Open No. 2009-240008 (FIG. 4) JP 2009-132357 A (FIG. 1)

  However, the conventional techniques described in Patent Document 1 and Patent Document 2 have a problem that the door mirror and the wiper cannot be shared during traveling.

  This invention solves the said conventional problem, and makes it a subject to provide the charge condition display apparatus for vehicles which can notify the charging amount of a battery outside even during driving | running | working.

  The present invention is a vehicle charge state display device including a travel restriction device that restricts the travel performance of the vehicle when the capacity of a battery mounted on the vehicle is reduced to a preset remaining capacity value. Display means mounted on a part visible from the display means, and display control means for changing the display state of the display means, and when the travel performance of the vehicle is limited by the travel control device, The display control means changes the display state of the display means.

  According to this, it is possible to visually recognize that the running performance of the host vehicle is restricted from the outside of the vehicle, particularly from the following vehicle, during traveling of an electric vehicle or the like.

  A temperature detection unit configured to detect a temperature of the battery; and the travel control device changes a degree of limitation of the travel performance of the vehicle based on the temperature detected by the temperature detection unit; The display state of the display means is changed based on the degree of restriction of the travel control device.

  According to this, by limiting the running performance of the vehicle based on the temperature of the battery, it is possible to suppress the deterioration of the battery, and even when the running performance is limited based on the temperature, it can be visually recognized from outside the vehicle. , Has the effect of preventing traffic congestion due to speed reduction.

  In addition, communication means capable of communicating with the display control means from the outside is provided, and the display control means switches the display state of the display means to a display state based on the capacity of the battery according to a signal from the communication means. It is possible to make it possible.

  According to this, it becomes possible to display the display state with respect to the limitation of the running performance while the vehicle is running and the display state with respect to the capacity state during battery charging using the same display means.

  ADVANTAGE OF THE INVENTION According to this invention, the charge state display apparatus for vehicles which can alert | report the charge amount of a battery outside during driving | running | working can be provided.

1 shows a vehicle equipped with a vehicle state-of-charge display device according to the present embodiment, wherein (a) is an overall schematic diagram of the vehicle, (b) is an enlarged view of an SOC indicator, and (c) is a schematic diagram of an in-meter indicator. . It is the schematic which shows the structure of a remote control key. It is a flowchart which shows the display control of the SOC indicator at the time of charge. It is a flowchart which shows display control of the SOC indicator at the time of driving | running | working. It is a map which shows the modification of the output limiting method of a battery. It is a map which shows the relationship between the rotational speed of a motor at the time of a battery output restriction | limiting, and a shaft torque, (a) when a battery output is restrict | limited from rated 100% to 75%, (b) is a battery output from rated 75%. When it is limited to 25%, (c) is when the battery output is limited from 25% to 10%. It is a flowchart which shows the modification of the display control of the SOC indicator at the time of driving | running | working. It is a map which shows the hysteresis relationship of a battery output restriction | limiting and battery temperature. It is the schematic which shows the modification of an SOC indicator.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. The vehicle state-of-charge display device 1 of the present embodiment can be applied to a vehicle V such as an electric vehicle (EV) or a plug-in hybrid vehicle (PHV). Hereinafter, a case where the vehicle charging state display device 1 is applied to an electric vehicle will be described as an example.

  As shown in FIG. 1 (a), a vehicle V equipped with the vehicle charging state display device 1 of the present embodiment includes an SOC indicator (display means) 2 visible from the outside of the vehicle, an instrument panel IP (see FIG. 1 (c)), an in-meter indicator 3, a chargeable / dischargeable battery 4, a PDU 5, a travel motor 6, an ECU 7 (travel control device, display control device), and the like.

  The SOC indicator 2 is composed of one indicator that performs three-color display, and indicates the charge amount of the battery 4 (SOC: the charge amount ratio with respect to the electric capacity of the battery 4), the rear end portion of the roof panel RP of the vehicle V, and It is arranged at the center in the vehicle width direction (left-right direction). As shown in FIG. 1B, the SOC indicator 2 includes light sources 2a, 2b, and 2c of three colors on the base B and a light-transmissive cover C that covers the light sources 2a to 2c. By arranging the SOC indicator 2 at the rear end portion of the roof panel RP of the vehicle V in this manner, the visual recognition from other vehicles (especially the following vehicle) is facilitated.

  The three color light sources 2a to 2c are, for example, green, orange, and red, but are not limited to these colors, and can be changed as appropriate. The light sources 2a to 2c can be configured using various light sources such as a light bulb and a light emitting diode.

  As shown in FIG. 1C, the in-meter indicator 3 is provided on the instrument panel IP in the passenger compartment, and is provided with indicators 3a, 3b, and 3c composed of light sources of three colors. The indicator 3a emits green light, the indicator 3b emits orange light, and the indicator 3c emits red light. Further, in the vicinity of the in-meter indicator 3 of the instrument panel IP, a meter 3d for analog display of the SOC ratio (%) of the battery 4 is provided in the vicinity of the speedometer. In addition, in this embodiment, although the indicator 3 in a meter is comprised by three indicators 3a-3c, you may be comprised by the single indicator.

  The battery 4 mainly stores electric power for driving the traveling motor 6 and is composed of a secondary battery such as nickel metal hydride or lithium ion. The battery 4 includes a plurality of cylindrical cells or laminate-type cells connected in series in a battery case (not shown) under the floor in the vehicle compartment or under the rear cargo compartment. Has been placed.

  The SOC of the battery 4 can be detected based on the current, voltage, and temperature of the battery 4, for example. Further, the SOC of the battery 4 may be determined only by the voltage. The current can be detected by a current sensor connected to the battery 4, the voltage can be detected by a voltage sensor connected to the battery 4, and the temperature can be detected by a temperature sensor 8 provided in the battery 4.

  The PDU (Power Drive Unit) 5 converts the DC power supplied from the battery 4 into AC power, and supplies this AC power to the traveling motor 6. Further, when the vehicle V is downhill, the traveling motor 6 is rotated via the transmission by the reverse driving force from the front wheels FW and FW, so that regenerative electric power is generated in the traveling motor 6. This regenerative power is converted into a DC voltage by the PDU 5 and the battery 4 is charged.

  The traveling motor 6 is connected to the front wheels FW, FW of the vehicle V, and the electric power stored in the battery 4 is supplied via the PDU 5. In the present embodiment, the case where the front wheels FW and FW are driven is described as an example. However, a rear wheel drive type that drives the rear wheels RW and RW may be used, and the front wheels FW and FW and the rear wheels may be driven. It may be a four-wheel drive type that drives the wheels RW and RW.

  The ECU 7 controls the display performance of the vehicle V when the SOC (battery capacity, charge amount) of the battery 4 is reduced to a preset remaining capacity value, and the display control means for changing the display state of the SOC indicator 2. And a control device. Further, the display control means controls to change the display state of the SOC indicator 2 when the travel performance of the vehicle V is limited by the travel control device.

  Further, the ECU 7 is electrically connected to a temperature sensor 8 that detects the temperature of the battery 4, and changes the degree of restriction of the running performance of the vehicle V based on the detected temperature of the battery 4. Further, the display control means changes the display state of the SOC indicator 2 based on the degree of travel performance restriction of the travel control device.

  The ECU 7 is electrically connected to a current sensor and a voltage sensor connected to the battery 4, and calculates the SOC of the battery 4 based on the current, voltage, and temperature of the battery 4.

  As shown in FIG. 2, the vehicle V can communicate with the outside of the vehicle V (outside the vehicle) by radio (infrared rays, radio waves, etc.) by a remote control key (so-called keyless entry function) 9. The remote control key 9 is inserted into a remote control key insertion portion around the driver's seat to start (IGON) and stop (IGOFF) the vehicle V. The remote control key 9 also has a push button type lock button 9a for locking the door of the vehicle V, a push button type lock release button 9b for releasing the door lock state, and the current SOC of the battery 4 as the SOC indicator 2. A push button type SOC confirmation button 9c to be displayed is provided.

  When the driver presses the SOC confirmation button 9c, a signal indicating that the SOC confirmation button 9c has been pressed is sent to the ECU 7 via an antenna provided in the vehicle V. The ECU 7 detects the current SOC of the battery 4 based on the signal, and causes the SOC indicator 2 to emit light with a color corresponding to the detected state of the SOC. As a result, it is not necessary to keep the current state of charge so that the current state of charge can be confirmed at all times, and since it operates only when the SOC confirmation button 9c is pressed, power is not consumed wastefully and theft prevention effect is also exhibited. it can.

  Next, operation | movement of the charge condition display apparatus 1 for vehicles of this embodiment is demonstrated. First, control when the vehicle V is stopped (IGOFF) and the battery 4 is being charged will be described with reference to FIG.

  When the ECU 7 detects the ON signal of the SOC confirmation button 9c of the remote control key 9, it determines whether or not a vehicle error signal is detected in step S100. The vehicle error signal is a problem in which charging cannot be continued in charging. Depending on the type (importance) of the vehicle error signal, the “failure 1” signal, the “failure 2” signal, and the “failure 3” signal are used. Is set. For example, the “failure 3” signal is more important than the “failure 1” signal. When the ECU 7 does not detect such a vehicle error signal (when it is not present) (S100, No), the process proceeds to step S110.

  In step S110, the ECU 7 determines whether or not the SOC of the battery 4 is greater than or equal to the first threshold value. The first threshold is set to 60%, for example. If the ECU 7 determines in step S110 that the SOC (capacity of the battery 4) is equal to or greater than the first threshold value (Yes), the ECU 7 proceeds to step S120 and lights the SOC indicator 2 in green. The time for turning on the SOC indicator 2 is set to 1 second, for example, but may be shorter or longer than 1 second as long as the driver can check the SOC. The same applies to steps S140 and S160 described later.

  If the ECU 7 determines in step S110 that the SOC is less than the first threshold value (No), the ECU 7 proceeds to step S130 and determines whether the SOC is equal to or greater than the second threshold value. Note that the second threshold is set to a value lower than the first threshold, for example, 30%.

  If the ECU 7 determines in step S130 that the SOC is greater than or equal to the second threshold value (Yes), the ECU 7 proceeds to step S140 and lights the SOC indicator 2 in orange for 1 second.

  If the ECU 7 determines in step S130 that the SOC is less than the second threshold value (No), the ECU 7 proceeds to step S150 and determines whether the SOC is greater than or equal to the third threshold value. Note that the third threshold is set to a value lower than the second threshold, for example, 15%.

  If the ECU 7 determines in step S150 that the SOC is greater than or equal to the third threshold value (Yes), the ECU 7 proceeds to step S160 and lights the SOC indicator 2 in red for 1 second.

  If the ECU 7 determines in step S150 that the SOC is less than the third threshold value (No), the ECU 7 proceeds to step S170 and blinks the SOC indicator 2 in red. The time for which the SOC indicator 2 blinks is set to 3 seconds, for example.

  On the other hand, if the ECU 7 determines in step S100 that a vehicle error signal has been detected (if present) (Yes), the ECU 7 proceeds to step S210. When the ECU 7 detects a vehicle error signal regardless of whether or not the SOC confirmation button 9c is operated, if the battery 4 is being charged, the charging of the battery 4 is stopped (charging is stopped).

  In step S210, the ECU 7 determines whether or not the vehicle error signal obtained in step S100 is a signal indicating failure 1. When the ECU 7 determines in step S210 that the vehicle error signal is the “failure 1” signal (Yes), the ECU 7 proceeds to step S220, blinks the SOC indicator 2 twice in red, and outputs the “failure 1” signal. And transmit as vehicle information. As vehicle information, a “failure 1” signal is transmitted to a JAF (Japan Automobile Federation), road service, dealer service, etc. using a telephone line etc. together with the current position, SOC, and the like.

  If the ECU 7 determines in step S210 that the vehicle error signal is not a “failure 1” signal (No), the ECU 7 proceeds to step S230 and determines whether or not the vehicle error signal is a “failure 2” signal. to decide. When the ECU 7 determines in step S230 that the vehicle error signal is the “failure 2” signal (Yes), the ECU 7 proceeds to step S240, blinks the SOC indicator 2 in red three times, and outputs the “failure 2” signal. The vehicle information is transmitted in the same manner as described above.

  If the ECU 7 determines in step S230 that the vehicle error signal is not a “failure 2” signal (No), the ECU 7 proceeds to step S250, and determines whether or not the vehicle error signal is a “failure 3” signal. to decide. When the ECU 7 determines in step S250 that the vehicle error signal is the “failure 3” signal (Yes), the ECU 7 proceeds to step S260, blinks the SOC indicator 2 in red four times, and outputs the “failure 3” signal. The vehicle information is transmitted in the same manner as described above.

  If the ECU 7 determines in step S250 that the vehicle error signal is not the “fault 3” signal (No), the ECU 7 proceeds to step S270 and blinks the SOC indicator 2 in red five times.

  Thus, when the vehicle error signal is issued, it is easy to notify the failure state to the outside by changing the number of blinks of the SOC indicator 2. Note that the failure state may be notified by changing the lighting time, blinking rhythm, and the like.

Next, display control of the vehicle charging state display device when the vehicle V is traveling will be described with reference to FIG.
As shown in FIG. 4, the ECU 7 determines whether or not the ignition switch of the vehicle V is turned on (IGON) in step S300. That is, being in IGON means that the vehicle V is in a traveling state or a state in which traveling is possible. If the ECU 7 determines in step S300 that the IGON is not performed (No), the ECU 7 repeats the step S300. If the ECU 7 determines that the IGON is performed (Yes), the ECU 7 proceeds to step S310.

  In step S310, the ECU 7 determines whether there is a vehicle error signal. The vehicle error signal includes a “failure 1” signal, a “failure 2” signal, a “failure 3” signal, etc., as in step S100 of FIG. If a vehicle error signal is detected in step S310 (Yes), the ECU 7 proceeds to step S440 and limits the output of the battery 4 to 10% of the rating. Then, the ECU 7 proceeds to step S450 and blinks red in conjunction with the SOC indicator 2 and the in-meter indicator 3 respectively.

  Then, the ECU 7 proceeds to step S460, and transmits the current location of the vehicle V, the SOC, and error information (type of vehicle error signal) as vehicle information to JAF, road service, dealer service, etc. via a telephone line or the like.

  On the other hand, if the vehicle error signal is not detected (No), the ECU 7 proceeds to step S320 and determines whether or not the temperature of the battery 4 detected by the temperature sensor 8 is equal to or higher than the first predetermined temperature. . The first predetermined temperature is set to 24 ° C., for example.

  If it is determined in step S320 that the temperature of the battery 4 is equal to or higher than the first predetermined temperature (Yes), the ECU 7 proceeds to step S330 and determines whether or not the SOC is equal to or higher than the first threshold value. Note that the first threshold is set to 60%, for example, as in step S110 of FIG.

  In step S330, when the SOC is equal to or greater than the first threshold value (Yes), that is, when it is determined that the SOC is sufficient, the ECU 7 proceeds to step S340 and sets the output of the battery 4 to 100% of the rating. .

  Then, the ECU 7 proceeds to step S350, interlocks the SOC indicator 2 and the in-meter indicator 3, and lights each green, and returns to step S310.

  On the other hand, if the ECU 7 determines in step S320 that the temperature of the battery 4 is lower than the first predetermined temperature (No), the ECU 7 proceeds to step S360 and determines whether or not the temperature of the battery 4 is equal to or higher than the second predetermined temperature. Determine whether. The second predetermined temperature is set to a temperature lower than the first predetermined temperature, and is set to 0 ° C., for example.

  If the ECU 7 determines in step S360 that the temperature of the battery 4 is equal to or higher than the second predetermined temperature (Yes), or if it is determined in step S330 that the SOC is less than the first threshold (No). In step S370, it is determined whether the SOC is equal to or greater than the second threshold value. The second threshold value (remaining capacity value) is set to a value lower than the first threshold value, for example, 30%, as in step S130 of FIG.

  If the ECU 7 determines in step S370 that the SOC is greater than or equal to the second threshold value (Yes), the ECU 7 proceeds to step S380 and limits the output of the battery 4 to 75% of the rating (restriction of the running performance of the vehicle V). Change the degree).

  Then, the ECU 7 proceeds to step S390, turns on the SOC indicator 2 and the in-meter indicator 3 in orange, and returns to step S310.

  On the other hand, when the ECU 7 determines in step S360 that the temperature of the battery 4 is lower than the second predetermined temperature (No), the ECU 7 proceeds to step S400 and determines whether or not the temperature of the battery 4 is equal to or higher than the third predetermined temperature. Determine whether. The third predetermined temperature is set to a temperature lower than the second predetermined temperature, for example, set to minus 30 ° C.

  If the ECU 7 determines in step S400 that the temperature of the battery 4 is equal to or higher than the third predetermined temperature (Yes), or if it is determined in step S370 that the SOC is less than the second threshold (No). ), The process proceeds to step S410, and it is determined whether the SOC is equal to or greater than a third threshold value. The third threshold value (remaining capacity value) is set to a value lower than the second threshold value, for example, 15%, as in step S150 of FIG.

  If the ECU 7 determines in step S410 that the SOC is greater than or equal to the third threshold value (Yes), the ECU 7 proceeds to step S420 and limits the output of the battery 4 to 25% of the rating (restriction of travel performance of the vehicle V). Change the degree).

  Then, the ECU 7 proceeds to step S430, turns on the SOC indicator 2 and the in-meter indicator 3 in red, and returns to step S310.

  Further, when ECU 7 determines in step S400 that the temperature of battery 4 is lower than the third predetermined temperature (No), or in step S410, ECU 7 determines that the SOC is lower than the third threshold ( No), the process proceeds to step S440, and the output of the battery 4 is limited to 10% of the rating (the degree of limitation of the running performance of the vehicle V is changed).

  Then, the ECU 7 proceeds to step S450, blinks the SOC indicator 2 and the in-meter indicator 3 in red, proceeds to step S460, and uses the current location, SOC, and error information (type of vehicle error signal) of the vehicle V as vehicle information. Call JAF, road service, dealer service, etc. via telephone line.

  Even when the temperature of the battery 4 is low during travel and the output restriction is being executed, it is possible to get out of the output restriction by continuing the travel and increasing the temperature of the battery 4.

  Thus, by displaying the in-meter indicator 3 provided in the driver's seat in conjunction with the SOC indicator 2, the driver can be informed of the SOC of the battery 4 and the output limit, and call attention. Can do.

  Further, when the vehicle V is traveling on an expressway, when the output of the battery 4 is restricted, the vehicle having low-speed travel on the screen of the electric bulletin board and navigation system provided on the expressway. By displaying information, it is possible to avoid traffic jams. In addition, when the vehicle V is traveling on a general road, the other vehicle displays the information of the low-speed traveling vehicle on the screen of the navigation system, and the vehicle displays the position information of the charging stand. It becomes possible to avoid traffic jams.

  FIG. 5 is a map showing a modification of the battery output limiting method. That is, in any case of the first predetermined temperature, the second predetermined temperature, and the third predetermined temperature, when the SOC falls below the second threshold value (for example, 30%), the output limitation of the battery 4 is started. For example, the first threshold is set to 60%, the second threshold is set to 30%, the third threshold is set to 15%, and the fourth threshold is set to 10%.

  FIG. 6 is a map showing the relationship between the rotational speed of the motor and the shaft torque when the battery output is limited. When (a) limits the output from 100% to 75%, (b) shows the output with a rating of 75. (C) is when the output is limited from 25% to 10%.

  6A to 6C, the thin solid line represents the relationship between the rotational speed of the traveling motor 6 before the output restriction and the shaft torque of the traveling motor 6, and the thick solid line represents the output after the output restriction. This is the relationship between the rotational speed of the traveling motor 6 and the shaft torque of the traveling motor 6, and the broken line indicates the torque required when the vehicle V travels on flat ground. In FIGS. 6A to 6C, a region indicated by dots indicates a region (continuous rated region) where the traveling motor 6 can be continuously operated.

  As shown in FIG. 6A, when the output (shaft torque) is limited to 75% of the rating, the area indicated by dots with the thick solid line as the upper limit is the continuous rating area. As shown in FIG. 6B, when the output (shaft torque) is limited to 25% of the rating, the area indicated by dots with the thick solid line as the upper limit is the continuous rating area. As shown in FIG. 6C, when the output (shaft torque) is limited to 10% of the rating, the area indicated by dots with the thick solid line as the upper limit is the continuous rating area.

  In addition, as shown in FIG. 6B, when the output of the traveling motor 6 is limited to 75% to 25% of the rating, the boundary line of the continuous rated area indicated by dots and the torque required for traveling on flat ground A cruise is possible at a speed V1 (for example, 90 km / h) at an intersection P1 with a broken line. In addition, as shown in FIG. 6C, when the output of the traveling motor 6 is limited to 25% to 10% of the rating, the thick solid line indicating the upper limit boundary of the shaft torque and the torque required for flat ground traveling At an intersection P2 with a broken line indicating cruising, it is possible to cruise at a speed V2 (for example, 83 km / h).

  Thus, even when the output of the battery 4 is limited from 75% to 25% or from 25% to 10%, the vehicle V is set at the predetermined cruise speeds V1 and V2. It can be run.

  FIG. 7 is a flowchart showing a modification of the display control of the SOC indicator during traveling, and FIG. 8 is a map showing the hysteresis relationship between the battery output limit and the battery temperature. The display control shown in FIG. 7 is a modification of the display control shown in FIG. 4, and the same control as in FIG.

  That is, as shown in FIG. 7, when the output of the battery 4 is limited to 10% of the rating (step S440), the ECU 7 blinks the SOC indicator 2 and the in-meter indicator 3 in red (step S450). In step S455, it is determined whether or not the temperature of the battery 4 is equal to or higher than a fourth predetermined temperature. The fourth predetermined temperature is slightly higher than the third predetermined temperature and lower than the second predetermined temperature, and is set to, for example, minus 28 ° C.

  When the ECU 7 determines in step S455 that the temperature of the battery 4 is lower than the fourth predetermined temperature (No), the ECU 7 returns to step S440 and determines that the temperature of the battery 4 is equal to or higher than the fourth predetermined temperature. (Yes), the process returns to step S410. When the ECU 7 determines that the SOC is equal to or greater than the third threshold (Yes), the ECU 7 increases the output of the battery 4 from 10% to 25% of the rating.

  Further, when the output of the battery 4 is limited to 25% of the rating (step S420), the ECU 7 turns on the SOC indicator 2 and the in-meter indicator 3 in red (step S430), and then proceeds to step S435. Then, it is determined whether or not the temperature of the battery 4 is equal to or higher than a fifth predetermined temperature. The fifth predetermined temperature is a temperature slightly higher than the second predetermined temperature and lower than the first predetermined temperature, and is set to 2 ° C., for example.

  When the ECU 7 determines in step S435 that the temperature of the battery 4 is lower than the fifth predetermined temperature (No), the ECU 7 returns to step S400 and determines that the temperature of the battery 4 is equal to or higher than the fifth predetermined temperature. (Yes), the process returns to step S370. If the ECU 7 determines that the SOC is equal to or greater than the second threshold (Yes), the output of the battery 4 is increased from 25% to 75% of the rating.

  When the output of the battery 4 is limited to 75% of the rating (step S380), the ECU 7 turns on the SOC indicator 2 and the in-meter indicator 3 in orange (step S390), and then proceeds to step S395. Then, it is determined whether or not the temperature of the battery 4 is equal to or higher than a sixth predetermined temperature. Note that the sixth predetermined temperature is slightly higher than the first predetermined temperature, and is set to 26 ° C., for example.

  When the ECU 7 determines in step S395 that the temperature of the battery 4 is lower than the sixth predetermined temperature (No), the ECU 7 returns to step S360 and determines that the temperature of the battery 4 is equal to or higher than the sixth predetermined temperature. (Yes), the process returns to step S330. If the ECU 7 determines that the SOC is greater than or equal to the first threshold (Yes), the ECU 7 increases the output of the battery 4 from 75% to 100% of the rating.

  Although not shown, in the control shown in FIG. 7, when the ECU 7 detects an IGOFF signal, the ECU 7 ends the series of processes.

  As shown in FIG. 8, when the temperature of the battery 4 fluctuates in the decreasing direction, the output restriction is executed based on the first predetermined temperature, the second predetermined temperature, and the third predetermined temperature, and conversely, 4 fluctuates in the increasing direction, the fourth predetermined temperature slightly higher than the third predetermined temperature, the fifth predetermined temperature slightly higher than the second predetermined temperature, and the sixth predetermined temperature slightly higher than the first predetermined temperature. The output limit is relaxed based on the predetermined temperature. Thus, by providing a hysteresis relationship between the case where the output restriction is executed and the case where the output restriction is relaxed, hunting such that the output restriction fluctuates frequently can be prevented.

  As described above, according to the vehicular charging state display device 1 of the present embodiment, the SOC indicator 2 (display means) is disposed at the rear end portion of the roof panel RP that is a portion that can be visually recognized from the outside of the vehicle. By displaying the state (remaining charge amount) by color coding or the like, it is possible to notify other vehicles (especially the following vehicles) that the output is restricted and the vehicle V is traveling at a low speed, thereby preventing traffic jams. It becomes possible.

  Further, according to the vehicle state-of-charge display device 1 of the present embodiment, the travel performance of the vehicle V is limited based on the temperature of the battery 4, so that the deterioration of the battery 4 can be prevented and the temperature of the battery 4 can be prevented. Even when the travel performance is limited based on the vehicle, the vehicle can be visually recognized from outside the vehicle, and the effect of preventing traffic jams due to speed reduction during climbing can be exhibited.

  Moreover, according to the charging state display device 1 for a vehicle according to the present embodiment, the display state with respect to the limitation of the traveling performance while the vehicle V is traveling and the display state with respect to the SOC (charging state) of the battery 4 that is charging the vehicle V are displayed. The same SOC indicator 2 can be used for display.

  FIG. 9 is a schematic diagram showing a modification of the SOC indicator. In the SOC indicator 2A shown in FIG. 9A, three green light emitting indicators 2e, 2f, and 2g are arranged at the rear end portion of the roof panel RP of the vehicle V and at intervals in the vehicle width direction. Yes. Moreover, the indicator 2f located in the center is located behind the indicators 2e and 2g on both sides. Thereby, the indicator 2f of the center part can be visually recognized not only from the rear but also from the side of the vehicle V. The instrument panel IP in the passenger compartment is provided with one in-meter indicator 3A that lights or blinks in green.

  In such an SOC indicator 2A, when the SOC is equal to or higher than a first threshold value (for example, 60%), three indicators 2e, 2f, and 2g are lit in green. When the SOC is equal to or higher than the second threshold value and lower than the first threshold value, the two indicators 2e and 2g at both ends are lit in green. When the SOC is less than the second threshold value, one of the central indicators 2f is lit in green and the in-meter indicator 3A is lit in green. When the SOC is less than the third threshold, one of the central indicators 2f blinks in green, and the in-meter indicator 3A blinks in green in conjunction with it.

  In the SOC indicator 2B shown in FIG. 9B, two green light emitting indicators 2h and 2i are located at the rear end of the roof panel RP of the vehicle V and at both ends in the vehicle width direction. The in-meter indicator 3B is lit or blinks in green as in the in-meter indicator 3A.

  In such an SOC indicator 2B, when the SOC is greater than or equal to the second threshold, two indicators 2h and 2i are lit in green. When the SOC is less than the second threshold, one of the indicators 2h is lit in green and the in-meter indicator 3B is lit in green. When the SOC is less than the third threshold value, one of the indicators 2h flashes green, and the in-meter indicator 3B flashes green.

  Further, in the SOC indicator 2C shown in FIG. 9C, the indicator 2j is located at the rear end portion of the roof panel RP of the vehicle V and at the center portion in the vehicle width direction. The in-meter indicator 3C is lit or blinks in green as in the in-meter indicators 3A and 3B.

  In such an SOC indicator 2C, when the SOC is equal to or greater than the second threshold value, the indicator 2j is lit in green, and the in-meter indicator 3C is lit in green in conjunction with this. Further, when the SOC is less than the second threshold, the indicator 2j blinks green, and the in-meter indicator 3C blinks green in conjunction with this.

  In the SOC indicator 2D shown in FIG. 9D, the indicator 2k is located at the rear end portion of the roof panel RP of the vehicle V and at the center portion in the vehicle width direction. The indicator 2k has green and red light sources, and lights up in green, lights up in red, and blinks. The in-meter indicator 3D is lit or blinks in red.

  In such an SOC indicator 2D, when the SOC is equal to or greater than the second threshold, the indicator 2k is lit in green. When the SOC is equal to or greater than the third threshold value, the indicator 2k is lit red, and the in-meter indicator 3D is lit red in conjunction with this. When the SOC is less than the third threshold, the indicator 2k blinks red, and the in-meter indicator 3D blinks red in conjunction with this.

  Further, as yet another modification of the SOC indicator 2, only when the SOC is a third threshold value (for example, 15%) or less, existing display means such as a hazard lamp and a brake lamp mounted on the vehicle are used. By making it blink, it becomes possible to display the limited state of the running performance. That is, by using a display means that is highly recognized by the driver of the vehicle V, it is possible to display the state of charge of the host vehicle. The hazard lamps and brake lamps correspond to one color display with two SOC indicator 2 indicators.

1 Vehicle charge state display device 2, 2A, 2B, 2C SOC indicator (display means)
3, 3A, 3B, 3D In-meter indicator 4 Battery 5 PDU
6 Traveling motor 7 ECU (traveling control device, display control means)
8 Temperature sensor (temperature detection means)
9 Remote control key (communication means)
V vehicle

Claims (3)

When the capacity of a battery mounted on a vehicle is reduced to a preset remaining capacity value, a vehicle charge state display device including a travel restriction device that restricts the travel performance of the vehicle,
Display means mounted on a part visible from outside the vehicle;
Display control means for changing the display state of the display means,
When the travel performance of the vehicle is limited by the travel control device, the display state of the display unit is changed by the display control unit. Temperature detecting means for detecting the temperature of the battery;
The travel control device changes a travel performance limit degree of the vehicle based on the temperature detected by the temperature detection means,
The said display control means changes the display state of the said display means based on the restriction | limiting degree of the said travel control apparatus, The charging condition display apparatus for vehicles of Claim 1 characterized by the above-mentioned. The display control means comprises communication means capable of communicating from the outside,
The vehicle according to claim 1 or 2, wherein the display control means can switch the display state of the display means to a display state based on the capacity of the battery by a signal from the communication means. Charge state display device.

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