JP2014230447A - Remaining capacity display device of power storage device and control device of hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remaining capacity display device by which a user of a vehicle can properly grasp a remaining capacity of a battery.SOLUTION: When a present remaining capacity of a battery (30) is within a normal use range (first remaining capacity range) (U1), display by a first indicator (39-1) which sets a lower limit value of the normal use range (U1) as 0% (minimum value), and sets an upper limit value as 100% (maximum value) is performed as the display of the remaining capacity of the battery (30), and on the other hand, when the present remaining capacity is out of the normal use range (second remaining capacity range) (U2) smaller than the lower limit value of the normal use range (U1), display by a second indicator (39-2) which sets the present remaining capacity as 0% (minimum value), and sets the upper limit value of the normal use range (U1) as 100% (maximum value ) is performed. Even if the remaining capacity of the battery (30) is a low capacity, since the display of the indicator (39) is moved from an initial time of charge, a use can recognize the progress of the charge.

Description

  The present invention relates to a remaining capacity display device of a power storage device that controls display of the remaining capacity based on the remaining capacity of the power storage device, and a vehicle using an internal combustion engine and an electric motor according to the amount of power stored in the remaining capacity display device and the power storage device. The present invention relates to a control apparatus for a hybrid vehicle including drive control means for controlling drive.

  There is a hybrid vehicle including an internal combustion engine (engine) and an electric motor (motor (motor generator)) as drive sources, and a power storage device (battery) that exchanges electric power with the motor. In such a hybrid vehicle, the storage amount (remaining capacity: SOC) of the battery is controlled. A battery indicator (remaining capacity display) may be displayed in a battery in which a usable capacity range is determined so that a user such as a vehicle driver can grasp the time until charging is completed. .

  For example, in a hybrid vehicle having a structure in which the power transmission path between the rotating shaft of the motor and the drive wheel cannot be separated, the amount of power generated by the motor is limited during extremely low speed travel. For this reason, if extremely low speed traveling is continuously performed, electric power for driving an on-vehicle auxiliary device (not shown) such as an air conditioner may be taken out from the battery during that time, and the battery may be overdischarged. Therefore, in order to prevent overdischarge of the battery, when the vehicle is started, driving of the engine is prohibited by prohibiting traveling of the vehicle in a region where the battery is in a low temperature state below a predetermined temperature and the remaining capacity (SOC) is below a predetermined capacity. Power is transmitted to the motor to generate power by the motor, and control to charge the battery with the power generated by the power generation is performed. At this time, a dedicated battery indicator is displayed on the meter in order to inform the user of the time required until the battery is fully charged and the vehicle is allowed to travel. The user can grasp the time required to complete the charging of the battery, that is, the travel permission by looking at the display of the battery indicator.

  By the way, in the battery indicator as described above, when the remaining capacity of the battery is within the normal use range, a level display in which the lower limit of the normal use range is 0% (minimum value) and the upper limit is 100% (maximum value) is displayed. To do. However, when the battery is in an extremely low temperature state, the remaining capacity of the battery may be lower than the normal use area. In such a case, until the remaining capacity of the battery is restored to the normal use region, the battery indicator display remains zero even though the battery is being charged. For this reason, the user who looks at the battery indicator cannot confirm the normal progress of charging, and may feel anxiety or stress while waiting for charging.

  In Patent Document 1, as a related art related to battery capacity display, in a vehicle including a battery charged with electric power generated by a generator / starter motor driven by an engine, the remaining capacity of the battery is a predetermined value. The following describes that the kick start recommendation indicator provided on the meter panel is turned on. Further, in Patent Document 2, a predetermined capacity of a battery capacity of a vehicle is allocated in advance to a capacity adjustment area for adjusting a battery capacity that decreases as the battery deteriorates, and a battery is determined from the detected voltage value and current value. A capacity display device is described in which the degree of deterioration of the battery is calculated, the capacity adjustment area is corrected according to the degree of deterioration, and the current battery capacity is displayed with segments that are not affected by battery deterioration. However, neither of Patent Documents 1 and 2 discloses a technique for avoiding that the display of the battery indicator does not operate even though the battery is being charged.

Japanese Patent No. 4697811 Japanese Patent No. 3671901

  The present invention has been made in view of the above points, and an object of the present invention is to provide a remaining capacity display device for a power storage device that enables a user of the vehicle to appropriately grasp the remaining capacity (charging status) of the power storage device, and An object of the present invention is to provide a control device for a hybrid vehicle provided with a remaining capacity display device.

  In order to solve the above-described problems, a remaining capacity display device for a power storage device according to the present invention is a power storage device (3) that can transfer power between a motor (3) as a drive source of a vehicle and the motor (3). 30), a remaining capacity detecting means (35) for detecting the remaining capacity of the power storage device (30), a remaining capacity display means (39) for performing display relating to the remaining capacity of the power storage device (30), Remaining capacity display control means (10) for controlling display of the remaining capacity by the remaining capacity display means (39) based on the remaining capacity detected by the remaining capacity detection means (35), the remaining capacity display control means (10) When the current remaining capacity of the power storage device (30) is in the first remaining capacity area (U1), the lower limit value of the first remaining capacity area (U1) is set to the minimum value, The first remaining capacity whose maximum value is the upper limit value of the first remaining capacity area (U1) While the display (39-1) is displayed, the current remaining capacity of the power storage device (30) is set to the second remaining capacity area (U2) that is smaller than the lower limit value of the first remaining capacity area (U1). In some cases, the display is performed by the second remaining capacity display (39-2) in which the current remaining capacity is the minimum value and the upper limit value of the first remaining capacity area (U1) is the maximum value. .

  According to the remaining capacity display device of the present invention, when the remaining capacity of the power storage device deviates from the lower limit value of the first remaining capacity area displayed in the first remaining capacity display, the current remaining capacity is displayed. By switching to the second remaining capacity display with a lower limit value, the user can accurately grasp the progress of charging of the power storage device even when the remaining capacity of the power storage device is less than the first remaining capacity region It becomes. Therefore, it is possible to accurately recognize the time required to complete charging of the power storage device. In this way, by switching the display mode by the remaining capacity display unit according to the current remaining capacity of the power storage device, it is possible to appropriately notify the user that charging of the power storage device is proceeding normally.

  Moreover, in said remaining capacity display apparatus, when the said remaining capacity display control means (10) performs the display by said 2nd remaining capacity display (39-2), according to the remaining capacity of the said electrical storage apparatus (30). It is better to control the rate of increase of the remaining capacity display.

  When displaying by the second remaining capacity display, the remaining capacity is displayed with the current remaining capacity as a lower limit value. Therefore, the remaining capacity of the power storage device is in the first remaining capacity area and the first remaining capacity is displayed. The time required to complete charging of the power storage device is longer than when displaying. For this reason, if control is performed to change the increase rate of the remaining capacity display according to the current remaining capacity of the power storage device, the user who sees the remaining capacity display has the impression that the charging of the power storage device is proceeding appropriately. It is possible to reduce the stress due to the waiting time until the completion of charging.

  In this case, the remaining capacity display control means (10) displays the remaining capacity in an area where the remaining capacity of the power storage device (30) is relatively low, compared to an area where the remaining capacity is relatively high. It is good to set so that the rate of increase of becomes relatively large. According to this configuration, it is possible to increase the increase rate of the remaining capacity display immediately after the start of charging. Therefore, it is possible to give an impression that charging is appropriately performed to the user who has viewed the remaining capacity display.

  Alternatively, in the region where the remaining capacity of the power storage device (30) is relatively high, the increase rate of the remaining capacity display is set to be relatively large compared to the region where the remaining capacity is relatively low. May be. According to this configuration, it is possible to increase the increase rate of the remaining capacity display just before the completion of charging. Therefore, it is possible to give an impression that the time until the charging is completed to the user who has seen the remaining capacity display.

  In the remaining capacity display device, the remaining capacity display control means (10) is configured such that when the remaining capacity of the power storage device (30) is higher than the upper limit value of the first remaining capacity region (U1). The third remaining capacity display (39-3) different from the first remaining capacity display (39-1) and the second remaining capacity display (39-2) is used, and the power storage device (30) The first remaining capacity display (39-1) or the second remaining capacity display (39-2) may be used when the remaining capacity is less than or equal to the upper limit value of the first remaining capacity area (U1). .

  According to this configuration, when the remaining capacity of the power storage device is in a normal capacity state, the third remaining capacity display is used as a normal display, while when the remaining capacity of the power storage device is in a low capacity state. By using the first remaining capacity display or the second remaining capacity display as an emergency display different from the normal display, it is possible to display the remaining capacity in more detail when the remaining capacity is in a low capacity state. In addition, the remaining capacity display is switched between the case where the remaining capacity is a normal remaining capacity and the case of a low capacity that requires urgent, so that the remaining capacity of the power storage device is in an urgently low capacity state for the user. This can be recognized with certainty.

  The remaining capacity display control means (10) displays the remaining capacity of the power storage device (30) by the second remaining capacity display (39-2) when the vehicle is started, and It may be performed when the temperature of the power storage device (30) is equal to or lower than a predetermined temperature.

  When the vehicle is started and the temperature of the power storage device (30) is equal to or lower than a predetermined temperature, the second remaining capacity of the power storage device is smaller than the lower limit value of the first remaining capacity region. If it is in the region, it is necessary to charge the power storage device while prohibiting the vehicle from traveling. Therefore, in such a case, the progress of charging can be appropriately notified to the user by switching the remaining capacity display to the second remaining capacity display.

  The present invention also relates to a hybrid vehicle comprising drive control means (10) for controlling driving of the vehicle by the internal combustion engine (2) and the electric motor (3) according to the amount of power stored in the power storage device (30). In the control device, the drive control means (10) indicates that the remaining capacity display of the power storage device (30) is the first remaining capacity display (39-1) or the second remaining capacity display (39-2). Until the upper limit of the motor (3) is reached, the vehicle using the internal combustion engine (2) and the electric motor (3) as a drive source is prohibited, during which the electric motor (3) is driven by the driving force of the internal combustion engine (2). The power storage device (30) is charged by power generation or supply of electric power from an external charger (38).

According to the hybrid vehicle control device of the present invention, when charging the power storage device while prohibiting the vehicle from running, the remaining capacity display device configured as described above is provided so that the user can display the remaining capacity display means. By seeing, it is possible to more accurately grasp the time required to complete the charging of the power storage device, that is, the vehicle travel permission. Therefore, it is not necessary to give the user stress due to the waiting time until the charging is completed and the vehicle is permitted to travel.
In addition, the code | symbol in said parenthesis shows the code | symbol of the component in embodiment mentioned later as an example of this invention.

  According to the remaining capacity display device of the power storage device according to the present invention, the user of the vehicle can appropriately grasp the remaining capacity (charging state) of the power storage device. According to the hybrid vehicle control device of the present invention, when charging the power storage device while prohibiting vehicle travel, the time required for the vehicle user to complete charging of the power storage device, that is, to permit travel of the vehicle. Can be grasped more accurately.

It is the schematic which shows the structural example of the hybrid vehicle provided with the remaining capacity display apparatus concerning one Embodiment of this invention. It is a figure for demonstrating the use area | region of a battery, and is a graph which shows the relationship between the temperature of a battery, and remaining capacity. FIG. 6A is a diagram showing a battery indicator, in which (a) is a first indicator displayed when the remaining battery capacity is within the normal use area, and (b) is displayed when the remaining battery capacity is outside the normal use area. It is a figure which shows the 2nd indicator. It is a figure which shows a battery indicator, and is a figure which shows the 3rd indicator displayed when the remaining capacity of a battery is outside a low-speed driving | running | working restriction | limiting area. It is a graph which shows the relationship between the remaining capacity (charge amount) of a battery, and the increase rate of an indicator level. It is a flowchart which shows the procedure of the remaining capacity display control (indicator control) of a battery, and the drive control of a hybrid vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram illustrating a configuration example of a hybrid vehicle including a control device according to an embodiment of the present invention. As shown in FIG. 1, the vehicle 1 of the present embodiment is a hybrid vehicle vehicle including an internal combustion engine 2 and an electric motor 3 as drive sources, and further includes an inverter 20 for controlling the electric motor 3, and an electric motor 3, a battery (power storage device) 30, a transmission (transmission) 4, a differential mechanism 5, left and right drive shafts 6 </ b> R and 6 </ b> L, and left and right drive wheels WR and WL Prepare. Here, the electric motor 3 is a motor and includes a motor generator, and the battery 30 is a capacitor and includes a capacitor. The internal combustion engine 2 is an engine, and includes a diesel engine, a turbo engine, and the like. The rotational driving force of the internal combustion engine (hereinafter referred to as “engine”) 2 and the electric motor (hereinafter referred to as “motor”) 3 is transmitted to the left and right via the transmission 4, the differential mechanism 5 and the drive shafts 6R and 6L. It is transmitted to the drive wheels WR and WL. A clutch C <b> 1 is provided between the engine output shaft (crankshaft) of the engine and the input shaft of the transmission 4 for switching whether or not the driving force of the engine 2 is transmitted.

  The vehicle 1 also includes an electronic control unit (ECU) 10 for controlling the engine 2, the motor 3, the transmission 4, the differential mechanism 5, the inverter 20, and the battery 30. The electronic control unit 10 is not only configured as a single unit, but also, for example, an engine ECU for controlling the engine 2, a motor generator ECU for controlling the motor 3 and the inverter 20, and a battery for controlling the battery 30. The ECU may be composed of a plurality of ECUs such as an AT-ECU for controlling the transmission 4. The electronic control unit 10 of the present embodiment controls the engine 2 and also controls the motor 3, the battery 30, and the transmission 4.

  The electronic control unit 10 performs control so that the motor alone travels (EV travel) using only the motor 3 as a power source according to various operating conditions, or performs the engine alone travel using only the engine 2 as a power source. Control is performed so as to perform cooperative traveling (HEV traveling) in which both the engine 2 and the motor 3 are used as power sources.

  In addition, the electronic control unit 10 includes, as control parameters, the accelerator pedal opening from the accelerator pedal sensor 31 that detects the depression amount of the accelerator pedal, and the brake pedal opening from the brake pedal sensor 32 that detects the depression amount of the brake pedal. , The shift position from the shift position sensor 33 for detecting the gear stage (shift stage), the vehicle speed from the vehicle speed sensor 34 for detecting the vehicle speed, and the remaining capacity from the remaining capacity detector 35 for measuring the remaining capacity (charged amount) of the battery 30. Various signals such as the battery temperature from the battery temperature sensor 36 that detects the capacity and the temperature of the battery 30 are input. The battery 30 is configured to be able to be charged by the external charging device 38 by connecting an external charging device 38 provided outside the vehicle via the connector 37.

  In addition, the vehicle 1 includes a battery indicator (remaining capacity display means) 39 for performing display related to the remaining capacity (SOC) of the battery. The battery indicator 39 can be, for example, an in-meter indicator provided on an instrument panel (not shown) in the passenger compartment. The configuration and display contents of the battery indicator 39 will be described later. The electronic control unit 10 functions as remaining capacity display control means for controlling the remaining capacity display of the battery 30 by the battery indicator 39.

  In addition, the vehicle 1 is a zone map for setting a control zone (area) according to the remaining capacity (SOC) of the battery 30 and data regarding whether or not control (HEV operation) related to driving of the hybrid vehicle 1 for each control zone can be performed. A ROM (storage means) 15 in which (data shown in FIG. 3) and the like are stored is provided. The electronic control unit 10 can exchange data with the ROM 15, and performs various controls relating to driving of the vehicle 1 using the engine 2 and the motor 3 based on the map and data in the ROM 15. It has become.

  The engine 2 is an internal combustion engine that generates a driving force for running the vehicle 1 by mixing fuel with air and burning it. The motor 3 functions as a motor that generates a driving force for running the vehicle 1 using the electric energy of the battery 30 when the engine 2 and the motor 3 collaborate or when only the motor 3 runs alone. In addition, when the vehicle 1 decelerates, it functions as a generator that generates electric power by regeneration of the motor 3. During regeneration of the motor 3, the battery 30 is charged with electric power (regenerative energy) generated by the motor 3.

  In a hybrid vehicle having a structure in which the power transmission path between the rotation shaft of the motor 3 and the drive wheels WR and WL cannot be separated, the amount of power generated by the motor 3 is limited during extremely low speed travel. Therefore, when continuously running at extremely low speed, electric power for driving an on-vehicle auxiliary machine (not shown) such as an air conditioner may be taken out from the battery 30 during the extremely low speed running and the battery 30 may be overdischarged. is there. Therefore, in order to prevent overdischarge of the battery 30, when the vehicle is started, the battery 30 is in a low temperature state below a predetermined temperature and the remaining capacity (SOC) is below a predetermined capacity (a low speed travel restriction region L1 described later). In this case, the vehicle is prohibited from traveling, the driving force of the engine 2 is transmitted to the motor 3 to generate electric power by the motor 3, and the battery 30 is charged with the electric power generated by the electric power generation. In this way, traveling of the vehicle is prohibited until the remaining capacity of the battery 30 is recovered. At this time, a dedicated battery indicator is displayed on the meter in order to inform the user such as the driver of the time required to complete the charging of the battery 30 and to allow the vehicle to travel. The user can grasp the time required to complete the charging of the battery 30, that is, the travel permission of the vehicle 1 by viewing the display of the battery indicator.

  FIG. 2 is a graph for explaining the usage area of the battery 30 and is a graph showing the relationship between the temperature of the battery 30 and the remaining capacity. In the graph of the figure, the horizontal axis represents the temperature T of the battery 30, and the vertical axis represents the remaining capacity SOC of the battery 30. As a region based on the relationship between the remaining battery capacity SOC and the temperature T, the low capacity travel limit region L1 in which low speed travel (very low speed travel) of the vehicle 1 is limited because the remaining capacity is low, and low speed travel is not limited. There is a low-speed travel restriction release region L2. The boundary between the low-speed travel restriction area L1 and the low-speed travel restriction release area L2 is a charge completion threshold value Lh when charging the battery 30 while prohibiting vehicle travel when starting the vehicle, which will be described later. The low-speed travel restriction area L1 includes a normal use area U1 in which the remaining capacity of the battery 30 is relatively high and a remaining capacity is displayed by a first indicator 39-1, which will be described later, and a normal use area. And U2 outside the normal use area where the remaining capacity is displayed by a second indicator 39-2 which will be described later.

  2 is a case where the current position according to the temperature T of the battery 30 and the remaining capacity SOC is in the low-speed travel restriction region L1 and further in the normal use region U1. . Further, the point B shown in the graph is a case where the point B exists outside the normal use area U2. As a specific example of this point B, for example, when the temperature of the battery 30 is not lowered, it was at the point C and was in the normal use region U1, but the temperature T of the battery 30 was lowered. In this case, there is a case where the normal use area U2 is shifted.

  3A and 3B are diagrams showing battery indicators. FIG. 3A shows a first indicator 39-1 displayed when the remaining capacity of the battery 30 is in the normal use area U1, and FIG. 3B shows the remaining capacity of the battery 30. It is a figure which shows the 2nd indicator 39-2 displayed when it is outside normal use area | region U2. In the present embodiment, when the remaining capacity of the battery 30 is in the low speed travel restriction region L1 and further in the normal use region U1 (point A), as shown in FIG. A first indicator 39-1 is displayed in which the lower limit and upper limit of the use area U1 are 0% and 100%, respectively. In this case, if the remaining capacity of the battery 30 is in the normal use area U1, the current remaining capacity of the battery 30 is always properly displayed by the display of the first indicator 39-1. Therefore, the user who sees the display can estimate the time required until the charging of the battery 30 is completed. On the other hand, when the remaining capacity of the battery 30 decreases to the outside of the normal use area U2, which is an area lower than the normal use area U1, the current remaining capacity is not accurately displayed on the first indicator 39-1. Therefore, the user who sees the display cannot estimate the time required until charging is completed. Therefore, in the present embodiment, when the remaining capacity of the battery 30 is present outside the normal use area U2, as shown in FIG. A second indicator 39-2 is displayed in which the capacity is 0% (minimum value) and the upper limit value of the normal use area U1 is 100% (maximum value). Thereby, even when the remaining capacity of the battery 30 is outside the normal use area U2 (point B), the current remaining capacity is appropriately displayed. Therefore, the user who has viewed the display can estimate the time required until the battery 30 is fully charged.

  Further, when displaying the remaining capacity of the battery 30 with the first indicator 39-1 or the second indicator 39-2, as shown in FIG. 3, the remaining capacity of the battery 30 exists outside the normal use area U2. In this case (FIG. 3B), compared with the case where the normal use area U1 exists (FIG. 3A), since the capacity difference until the completion of charging is large, the time required to complete the charging becomes longer. As a result, the user may be stressed due to the waiting time until the charging is completed. Therefore, in this embodiment, in order to reduce the stress due to the standby time until the completion of charging, the increase rate (increase allocation) of the indicator level is changed from the initial charging stage to the final charging stage.

  FIG. 5 is a graph showing the relationship between the charge amount of the battery 30 and the indicator level increase amount. In the normal pattern indicated by a solid line in the figure, the increase rate (assignment) of the indicator level with respect to the charge amount of the battery 30 is set to be constant. On the other hand, in the pattern 1 shown by the alternate long and short dash line in the same figure, the increase rate of the indicator level at the initial charging stage of the battery 30 is set large, and the increase rate of the indicator level at the end of charging of the battery 30 is set small. ing. Thereby, since the increasing speed of the indicator level immediately after the start of charging of the battery 30 is increased, it is possible to give an impression that charging is appropriately progressing to the user who has viewed the display. Further, in the pattern 2 indicated by the dotted line in FIG. 5, the increase rate of the indicator level at the initial stage of charging of the battery 30 is set to be small, and the increase rate of the indicator level at the end of charging of the battery 30 is set to be large. Thereby, the indicator level increase speed immediately before the completion of charging of the battery 30 is increased, and an impression of a short time until the charging is completed can be given.

  FIG. 4 is a diagram showing a third indicator displayed when the remaining capacity of the battery 30 is in the low-speed travel restriction release region L2. As shown in the figure, the first indicator 39-1 or the second indicator 39-2 is used only when the remaining capacity of the battery 30 is within the low speed travel restriction area (below the upper limit value of the low speed travel restriction area). When the remaining capacity of the battery 30 is in the low speed travel restriction release region L2 (capacity higher than the upper limit value Lh of the low speed travel restriction region L1), the third indicator 39-3 shown in FIG. 4 is used. The third indicator 39-3 is an indicator having a larger display range capable of displaying the entire remaining capacity of the battery 30, and the battery indicator 39 includes the third indicator 39- in a normal traveling state. 3 is displayed. And when the remaining capacity of the battery 30 falls to the low speed travel restriction region L1, the display of the battery indicator 39 is switched from the third indicator 39-3 to the first indicator 39-1 or the second indicator 39-2. It has become.

  FIG. 6 is a flowchart showing a procedure for the display control of the battery indicator and the drive control of the hybrid vehicle. Here, in step ST1, the system is started when an ignition switch (not shown) of the vehicle is turned on (IGON). In addition, IGON here means that the vehicle is in a traveling state or a state in which traveling is possible by a user performing a predetermined starting operation such as turning on an ignition switch. Thereafter, it is determined whether or not the remaining capacity of the battery 30 is in the low-speed travel restriction region L1 (step ST2). As a result, if the vehicle is not in the low-speed travel restriction region L1 (NO), the vehicle travels by driving the engine 2 or the motor 3 is permitted (step ST3). On the other hand, if it is the low-speed travel restriction area L1 (YES), it is determined whether or not the remaining capacity of the battery 30 is less than the normal use area U1 (step ST4). As a result, if the remaining capacity of the battery 30 is not less than the normal use area U1 (NO), that is, if the remaining capacity of the battery 30 is within the normal use area U1, the lower limit value of the normal use area U1 as the battery indicator 39 Is set to 0%, and the first indicator 39-1 (see FIG. 3A) with the upper limit of the normal use area U1 being 100% is displayed (ST5). In this case, the normal pattern shown in FIG. 5 is selected as the pattern of the increase rate of the indicator level by the first indicator 39-1 (ST6). Then, traveling of the vehicle by driving the engine 2 or the motor 3 is prohibited (step ST7), and the power generation of the motor 3 by the driving force of the engine 2 or the charging of the battery 30 by the external charging device 38 is performed (step ST18).

  On the other hand, if the remaining capacity of the battery 30 is less than the normal use area in the previous step ST4 (YES), the current remaining capacity is 0% (minimum value) and the upper limit value of the normal use area is 100% (maximum value). The second indicator 39-2 (see FIG. 3B) is displayed (step ST9). In this case, the pattern 1 or the pattern 2 shown in FIG. 5 is selected as the pattern of the increase rate of the indicator level by the second indicator 39-2 (step ST10). Also in this case, the vehicle is prohibited from traveling by driving the engine 2 or the motor 3 (step ST7), and the battery 30 is charged by the driving of the engine 2 or the external charging device 38 (step ST18).

  As described above, according to the remaining capacity display device of the battery 30 included in the hybrid vehicle of the present embodiment, when the current remaining capacity of the battery 30 is within the normal use area (first remaining capacity area), The first indicator (second remaining capacity display) 39-1 with the lower limit value of the normal use area being 0% (minimum value) and the upper limit value of the normal use area being 100% (maximum value) is displayed. On the other hand, if the current remaining capacity is outside the normal use area (second remaining capacity area) which is less than the lower limit value of the normal use area, the current remaining capacity is set to 0% (minimum value) for normal use. The display is performed by the second indicator (second remaining capacity display) 39-2 in which the upper limit value of the area is set to 100% (maximum value). That is, when the remaining capacity of the battery 30 deviates from the normal use area displayed by the first indicator 39-1, the battery 30 is switched to the second indicator 39-2 having the current remaining capacity as the lower limit value. As a result, the user can accurately grasp the progress of the charging of the battery 30. In this way, by switching the display mode of the battery indicator 39 according to the current remaining capacity of the battery 30, charging is normally progressing for the user regardless of the current remaining capacity of the battery 30. Notification can be appropriately performed.

  That is, normally, the first indicator 39-1 is displayed in the low-speed travel restriction area L1. In the first indicator 39-1, the upper limit value of the normal use area U1 is 100% (maximum value), and the lower limit value of the normal use area U1 is 0% (minimum value). However, in this display method, in the case where the remaining capacity of the battery 30 is outside the normal use area (forced charge area) U2 at the time of IGON (point B in FIG. 2), while the battery indicator is being charged to the normal use area U1, The display does not move. For this reason, it is difficult for the user to grasp the time required to complete charging. Therefore, when it is outside the normal use area (forced charge area) U2 at the time of IGON, the remaining capacity at the time of IGON is set to 0% of the indicator, and the upper limit value of the normal use area U1 is assigned to be 100% of the indicator, Since it becomes possible for the user to visually grasp the progress of charging from the beginning of charging, it is possible to avoid stressing the user.

  When the display by the second indicator 39-2 is performed, the display with the current remaining capacity position as the lower limit is performed. Therefore, the display by the first indicator 39-1 is performed when the remaining capacity is in the normal use area U1. The time required to complete the charging of the battery 30 is longer than when performing it. Therefore, here, when the display by the second indicator 39-2 is performed, control for changing the increasing rate of the battery indicator according to the remaining capacity of the battery 30 is performed. Specifically, in the pattern 1 described above, in the region where the remaining capacity of the battery 30 is relatively low (region in the initial stage of charging), the region in which the remaining capacity is relatively high (region in the end of charging). Thus, the increase rate of the remaining capacity display is set to be relatively large. Thereby, the increase rate of the remaining capacity display immediately after the start of charging can be increased. Therefore, it is possible to give an impression that the battery 30 is appropriately charged to the user who has viewed the display. Further, in the above pattern 2, in the region where the remaining capacity of the battery 30 is relatively high (region at the end of charging), the remaining capacity is compared to the region where the remaining capacity is relatively low (region at the beginning of charging). Set so that the increase rate of capacity display is relatively large. Thereby, the increase speed of the remaining capacity display immediately before the completion of charging can be increased. Therefore, it is possible to give the user who has seen the display the impression that the time until the charging is completed is short. In this way, by performing control to vary the increase rate of the indicator display according to the current remaining capacity of the battery 30, the user who has seen the battery indicator 39 gives an impression that the charging of the battery 30 is proceeding appropriately. It is possible to reduce the stress due to the waiting time until the completion of charging.

  Further, in the hybrid vehicle of the present embodiment, when the remaining capacity of the battery 30 is equal to or lower than the low speed travel restriction region L1, the first indicator 39-1 or the second indicator 39-2 is used as the battery indicator 39, When the remaining capacity of the battery 30 is higher than the low speed travel restriction region L1, the third indicator 39-3 is used. Thus, when the remaining capacity of the battery 30 is in the normal capacity state, the third indicator 39-3 is used as a normal display, while when the remaining capacity of the battery 30 is in the low capacity state, By using the first indicator 39-1 or the second indicator 39-2 as an emergency display different from the normal one, it is possible to display a detailed remaining capacity in a low capacity state. In addition, the remaining capacity display is switched between the case where the remaining capacity is a normal remaining capacity and the case where the remaining capacity is a low capacity which requires urgent, so that the remaining capacity of the battery 30 is in a low capacity state where the user needs to be urgent. This can be recognized with certainty.

  In the hybrid vehicle of the present embodiment, the vehicle using the engine 2 and the motor 3 as drive sources until the remaining capacity display of the battery 30 reaches the upper limit of the first indicator 39-1 or the second indicator 39-2. In the meantime, the battery 30 is charged by the power generation of the motor 3 or the external charging device 38. As a result, when charging the battery 30 while prohibiting the vehicle from traveling, the battery indicator 39 having the above-described configuration is provided, so that the user sees the display of the battery indicator 39, so that the charging of the battery 30 is completed. It is possible to grasp the time required for permitting the vehicle to travel more accurately. Therefore, it is not necessary to give the user stress due to the waiting time until the charging is completed and the vehicle is permitted to travel.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Deformation is possible.

1 vehicle (hybrid vehicle)
2 Internal combustion engine
3 Electric motor
4 Transmission 5 Differential mechanism WR, WL Drive wheel 10 Electronic control unit (remaining capacity display control means, drive control means)
20 Inverter 30 Battery (power storage device)
35 Remaining capacity detector (remaining capacity detection means)
36 Battery temperature sensor 37 Connector 38 External charging device 39 Battery indicator (remaining capacity display means)
39-1 First indicator (first remaining capacity display)
39-2 Second indicator (second remaining capacity display)
39-3 Third indicator (third remaining capacity display)
L1 Low-speed travel restriction area L2 Low-speed travel restriction release area Lh Charging completion threshold U1 Normal use area U2 Outside normal use area

Claims (7)

An electric motor as a drive source of the vehicle;
A power storage device capable of transferring power to and from the electric motor;
A remaining capacity detecting means for detecting a remaining capacity of the power storage device;
A remaining capacity display means for displaying the remaining capacity of the power storage device;
A remaining capacity display control means for controlling the display of the remaining capacity by the remaining capacity display means based on the remaining capacity detected by the remaining capacity detection means,
If the current remaining capacity of the power storage device is in the first remaining capacity area, the remaining capacity display control means sets the lower limit value of the first remaining capacity area to the minimum value and sets the first remaining capacity area While displaying by the first remaining capacity display with the upper limit value of
When the current remaining capacity of the power storage device is in a second remaining capacity area that is less than the lower limit value of the first remaining capacity area, the current remaining capacity is set to the minimum value and the upper limit of the first remaining capacity area A remaining capacity display device for a power storage device, wherein display is performed by a second remaining capacity display in which the value is a maximum value. The remaining capacity display control means includes:
When displaying by the second remaining capacity display,
2. The remaining capacity display device for a power storage device according to claim 1, wherein control is performed to change an increasing rate of the remaining capacity display in accordance with the remaining capacity of the power storage device. The remaining capacity display control means includes:
In the region where the remaining capacity of the power storage device is relatively low, the increase rate of the remaining capacity display is set to be relatively large compared to the region where the remaining capacity is relatively high. The remaining capacity display device of the power storage device according to claim 2. The remaining capacity display control means includes:
In the region where the remaining capacity of the power storage device is relatively high, the increase rate of the remaining capacity display is set to be relatively large compared to the region where the remaining capacity is relatively low. The remaining capacity display device of the power storage device according to claim 2. The remaining capacity display control means includes:
When the remaining capacity of the power storage device is higher than the upper limit value of the first remaining capacity region, a third remaining capacity display different from the first remaining capacity display and the second remaining capacity display is used. And
The said 1st remaining capacity display or the said 2nd remaining capacity display is used when the remaining capacity of the said electrical storage apparatus is below the upper limit of the said 1st remaining capacity area | region, The said 2nd remaining capacity display is used. A remaining capacity display device of a power storage device. The remaining capacity display control means includes:
The display of the remaining capacity of the power storage device by the second remaining capacity display is performed when the vehicle is started and when the temperature of the power storage device is equal to or lower than a predetermined temperature. The remaining capacity display device of the power storage device according to claim 1. The remaining capacity display device according to any one of claims 1 to 6,
Drive control means for controlling driving of the vehicle by the internal combustion engine and the electric motor according to the amount of power stored in the power storage device, and a control device for a hybrid vehicle comprising:
The drive control means is configured to drive the vehicle using the internal combustion engine and the electric motor as drive sources until the remaining capacity display of the power storage device reaches the upper limit of the first remaining capacity display or the second remaining capacity display. In the meantime, the electric power generation of the electric motor by the driving force of the internal combustion engine or the charging of the power storage device by the supply of electric power from an external charger is performed.

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