JP5905801B2 - Range display device - Google Patents

Description

  The present invention relates to a cruising range display device, and in particular, is mounted on an electric vehicle including a traveling motor and a battery that exchanges electric power with the motor, and is capable of cruising for displaying a cruising range of the vehicle on a display unit. The present invention relates to a distance display device.

  Conventionally, it is mounted on a vehicle that travels by driving a motor with the power of the traveling battery, and the traveling distance per unit capacity of the traveling battery is calculated as the electric cost based on the power consumption of the traveling battery and the traveling distance of the vehicle. The vehicle calculates the reduced power consumption by suppressing fluctuations in the power consumption based on the remaining amount of power of the traveling battery, and uses the remaining power of the traveling battery and the remaining power of the traveling battery based on the reduced power consumption. A cruising distance calculation device that calculates a cruising distance that is an estimated value of the distance traveled by has been proposed (see, for example, Patent Document 1). In this device, such a process prevents sudden changes in the cruising range when the power consumption fluctuates greatly.

JP 2012-50293 A

  In the above cruising distance calculation device, the same gradual change process is applied to the power consumption based on the power consumption of the traveling battery and the vehicle travel distance, regardless of whether the cruising distance becomes longer or shorter, and the restrained power consumption is reduced. It is calculated and the cruising distance is calculated based on the remaining amount of power of the battery for travel and the restrained electricity consumption, but changing the cruising distance to make the driver pay more attention is one of the issues Has been.

  The main object of the cruising range display device of the present invention is to make the driver pay more attention.

  The cruising range display device of the present invention employs the following means in order to achieve the main object described above.

The cruising range display device of the present invention,
A cruising distance display device that is mounted on an electric vehicle including a traveling motor and at least one battery that exchanges electric power with the motor, and displays a cruising distance of the vehicle on a display unit,
A temporary cruising distance is calculated using a vehicle electricity cost and a storage ratio of the at least one battery, a gradual change process is performed on the calculated temporary cruising distance, a cruising distance is calculated, and the calculated cruising distance Comprising a display control means for displaying a possible distance on the display unit;
The gradual change process is such that when the calculated temporary cruising range is less than the previous cruising range, the cruising range is more quickly compared to when the calculated temporary cruising range is greater than or equal to the previous cruising range. Is a process to change,
This is the gist.

  In the cruising range display device according to the present invention, the tentative cruising range is calculated using the vehicle electricity cost and the power storage ratio of at least one battery, and the cruising range is calculated and subjected to a gradual change process. The distance is calculated, and the calculated cruising distance is displayed on the display unit. Thereby, it is possible to suppress a sudden change in the cruising range, and it is possible to suppress the driver from feeling uncomfortable. Then, as the gradual change process, when the tentative cruising distance is less than the previous cruising distance, a process of changing the cruising distance more quickly than when the tentative cruising distance is greater than or equal to the previous cruising distance is performed. . It is considered that the driver pays more attention when the cruising distance decreases than when the cruising distance increases in order to prevent the vehicle from running out of electricity. Therefore, when the temporary cruising distance is less than the previous cruising distance, the gradual change process that changes the cruising distance more quickly than when the temporary cruising distance is more than the previous cruising distance is set as the temporary cruising distance. By applying and calculating the cruising range, it is possible to make the driver pay more attention. Here, the “cruising distance” refers to a distance (cruising distance) that can be traveled with an amount of electric power that can be discharged from the battery. Further, the “electricity cost” is used as the electric energy per unit distance [Wh / km].

  In such a cruising range display device of the present invention, the gradual change process is a process of rapidly changing the cruising range as the difference between the calculated temporary cruising range and the previous cruising range is large. You can also In this way, the cruising range can be changed more appropriately.

  In the cruising range display device of the present invention, the electric vehicle includes a plurality of the batteries, and further includes a plurality of relays that respectively connect and disconnect the plurality of batteries and the motor. The display control means may be means for setting the calculated temporary cruising range as the cruising range when any of a plurality of batteries is disconnected from the motor. In this way, the driver can more easily understand that the number of batteries connected to the motor has changed.

  Further, in the cruising range display device of the present invention, the slow change process may be a rate process or a smoothing process.

  In addition, in the cruising range display device of the present invention, the electric vehicle is a vehicle including an electric device that operates using electric power from the battery, and the display control means travels for a first predetermined time. It can also be a means for calculating the vehicle power consumption using the power consumption for traveling at the time and the power consumption of the electric device when traveling for the second predetermined time.

It is a block diagram which shows the outline of a structure of the electric vehicle 20 carrying the cruising range display apparatus as one Example of this invention. It is a flowchart which shows an example of the cruising range display control routine performed by the electronic control unit 50 of an Example. It is explanatory drawing which shows an example of the mode of a time change of the vehicle electricity consumption Ev, the electric energy Wbsoc of a battery apparatus, and the cruising range L. It is a flowchart which shows an example of the cruising range display control routine of a modification. It is explanatory drawing which shows an example of the mode of the time change of the cruising range L of a modification. It is a flowchart which shows an example of the cruising range display control routine of a modification.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of a configuration of an electric vehicle 20 equipped with a cruising range display device as an embodiment of the present invention. As shown in FIG. 1, the electric vehicle 20 according to the embodiment drives a motor 32 that can input and output power to a drive shaft 22 connected to drive wheels 26 a and 26 b via a differential gear 24, and a motor 32. Inverters 34, batteries 36, 40 configured as, for example, lithium ion secondary batteries, relays 38, 42 for connecting and disconnecting the batteries 36, 40 and the inverter 34, and batteries 36, 40 and the inverter 34 An air conditioner 46 that performs air conditioning in the passenger compartment by receiving power supplied from the connected power line 44, a display unit 70 that is disposed in the vicinity of the driver's seat and displays a cruising range, and electronic control that controls the entire vehicle. A unit 50. In the embodiment, the display unit 70 and the electronic control unit 50 correspond to a cruising range display device. In the following description, a combination of the batteries 36 and 40 may be referred to as a battery device.

  The electronic control unit 50 is configured as a microprocessor centered on the CPU 52. In addition to the CPU 52, a ROM 54 that stores a processing program, a RAM 56 that temporarily stores data, and a nonvolatile memory that holds the stored data. A flash memory 58 and an input / output port (not shown) are provided. The electronic control unit 50 detects the rotational position θm of the rotor of the motor 32 from the rotational position detection sensor 32 a that detects the rotational position of the rotor of the motor 32, and the phase current flowing in each phase of the three-phase coil of the motor 32. Phase current from the current sensor, terminal voltages Vb1, Vb2 from the voltage sensors 37a, 41a attached between the terminals of the batteries 36, 40, current sensors 37b, 41b attached to the output terminals of the batteries 36, 40 Charge / discharge currents Ib1, Ib2, battery temperatures Tb1, Tb from temperature sensors 37c, 41c attached to the batteries 36, 40, power consumption Pac of the air conditioner 46 from the power sensor 47 attached to the air conditioner 46, ignition switch (Start switch) Ignition signal from 60, operation position of shift lever 61 The shift position SP from the shift position sensor 62 that detects the depression, the accelerator opening Acc from the accelerator pedal position sensor 64 that detects the depression amount of the accelerator pedal 63, and the brake pedal position sensor 66 that detects the depression amount of the brake pedal 65 The brake pedal position BP, the vehicle speed V from the vehicle speed sensor 68, and the like are input via the input port. From the electronic control unit 50, a switching control signal to a switching element (not shown) of the inverter 34, a control signal to the air conditioner 46, a control signal to the display unit 70, and the like are output via an output port. The electronic control unit 50 calculates the electrical angle θe, rotational angular velocity ωm, and rotational speed Nm of the rotor of the motor 32 based on the rotational position θm of the rotor of the motor 32 detected by the rotational position detection sensor 32a, Based on the charging / discharging currents Ib1 and Ib2 of the batteries 36 and 40 detected by the sensors 37b and 41b, the storage ratios SOC1 and SOC2 that are the ratios of the electric energy that can be discharged from the batteries 36 and 40 at that time to the total capacity are calculated. Or the input / output limits Win1, Win2, Wout1, Wout2, which are the maximum allowable power that may charge / discharge the batteries 36, 40, based on the calculated storage ratios SOC1, SOC2 and battery temperatures Tb1, Tb2. ing.

  In the electric vehicle 20 of the embodiment thus configured, the electronic control unit 50 sets the required torque Tr * to be output to the drive shaft 22 according to the accelerator opening Acc and the vehicle speed V, and inputs the batteries 36 and 40. Torque limits Tmin and Tmax as upper and lower limits of torque that may be output from the motor 32 by dividing the sum of the limits Win1 and Win2 (Win1 + Win2) and the sum of the output limits Wout1 and Wout2 (Wout1 + Wout2) by the rotational speed Nm of the motor 32 The torque command Tm * is set as a torque to be output from the motor 32 by limiting the required torque Tr * with the torque limits Tmin and Tmax, and the inverter is driven so that the motor 32 is driven with the set torque command Tm *. Switching control of 34 switching elements is performed.

  Next, the operation of the electric vehicle 20 of the embodiment configured as described above, particularly the operation when displaying the cruising range on the display unit 70 will be described. Here, the “cruising distance” refers to a distance (cruising distance) that can be traveled with the amount of electric power that can be discharged from the batteries 36 and 40. FIG. 2 is a flowchart illustrating an example of a cruising range display control routine executed by the electronic control unit 50 of the embodiment. This routine is repeatedly executed every predetermined time (for example, every several msec).

  When the cruising range display control routine is executed, the electronic control unit 50 first executes a process of inputting data such as the travel electricity cost Ed, the air conditioning electricity cost Eac, the storage ratios SOC1 and SOC2 of the batteries 36 and 40 (step). S100). Here, “electricity cost” is assumed to be used as the electric energy [Wh / km] per unit distance in the embodiment. Therefore, the smaller the value of the power consumption, the better.

  The travel electricity cost Ed is calculated by dividing the electric energy Wm [Wh] of the motor 32 when traveling for a predetermined time T1 (for example, 2 minutes, 3 minutes, 5 minutes, etc.) by the distance L1 [km] traveled during that time. The data written in the RAM 56 is read and input. Therefore, the travel electricity cost Ed is updated every predetermined time T1. The electric power Wm of the motor 32 is the product of the power consumption Pm of the motor 32 obtained as the product of the torque command Tm * of the motor 32 and the rotation speed Nm, and the product of the inter-terminal voltage Vb of the battery 36 and the charge / discharge current Ib. Can be calculated as an integrated value for a predetermined time T1 of a value (Pb−Pac) obtained by subtracting the power consumption Pac of the air conditioner 46 from the discharge power Pb from the battery 36 obtained as follows.

  Further, the air conditioning power consumption Eac is obtained by dividing the electric energy Wac [Wh] of the air conditioner 46 when traveling for a predetermined time T2 (for example, 20 minutes, 30 minutes, 40 minutes, etc.) by the distance L2 [km] traveled during that time. Thus, the data calculated and written in the RAM 56 is read and input. Therefore, the air conditioning power consumption Eac is updated every predetermined time T2. The electric energy Wac of the air conditioner 46 can be calculated as an integrated value of the predetermined time T1 of the power consumption Pac of the air conditioner 46.

  Further, the storage ratios SOC1 and SOC2 of the batteries 36 and 40 are calculated based on the charge / discharge currents Ib1 and Ib2 of the batteries 36 and 40 detected by the current sensors 37b and 41b, and are read and input. To do.

  When the data is input in this way, the sum of the input running power cost Ed and air conditioning power cost Eac is calculated as the vehicle power cost Ev (step S110), and the battery 36 is obtained by multiplying the storage ratio SOC1 [%] of the battery 36 by the conversion factor ke1. The battery device discharges as the sum of the electric energy Wbsoc1 [Wh] that can be discharged from 36 and the electric energy Wbsoc2 [Wh] that can be discharged from the battery 40 obtained by multiplying the storage ratio SOC2 [%] of the battery 40 by the conversion factor ke2. A possible power amount Wbsoc [Wh] is calculated (step S120), and the battery device power amount Wbsoc is divided by the vehicle power consumption Ev to calculate a temporary cruising range Ltmp as a temporary value of the cruising range L (step S120). S130). Here, the conversion factors ke1 and ke2 are determined based on the total capacity of the batteries 36 and 40, and the like.

  Subsequently, the subtractable value ΔL is calculated by subtracting the cruising range (previous L) calculated when the routine was executed last time from the temporary cruising range Ltmp (step S140), and the calculated subtracted value ΔL is set to the value 0. (Step S150). This process is a process for determining whether or not the cruising distance L is decreased with respect to the previous cruising distance (previous L).

  When the subtraction value ΔL is greater than or equal to the value 0, it is determined that the cruising distance L is increased or not changed with respect to the previous cruising distance (previous L), and the coefficient kr1 in the range larger than the value 0 and smaller than the value 1 is determined. Is multiplied by the subtraction value ΔL to calculate the rate value Rt (step S160), and the calculated rate value Rt is added to the previous cruising range (previous L) to calculate the cruising range L (step S180). The cruising distance L is displayed on the display unit 70 (step S190), and this routine is terminated. On the other hand, when the subtraction value ΔL is less than 0, it is determined that the cruising distance L is decreased with respect to the previous cruising distance (previous L), and the coefficient kr2 in the range larger than the coefficient kr1 and smaller than the value 1 is subtracted. Multiply ΔL to calculate the rate value Rt (step S170), add the calculated rate value Rt to the previous cruising range (previous L) to calculate the cruising range L (step S180), and calculate the cruising range L is displayed on the display unit 70 (step S190), and this routine is terminated.

  Here, the process of step S180 is a process of calculating the cruising range L by performing rate processing on the temporary cruising range Ltmp. Thereby, it is possible to suppress a sudden change in the cruising range L, and it is possible to suppress the driver from feeling uncomfortable. In this embodiment, the rate value Rt used for this rate processing is set so that the larger the subtraction value ΔL is, the larger the subtraction value ΔL is, and the larger the subtraction value ΔL is. When the value is less than 0, the smaller the subtraction value ΔL (the larger the absolute value), the smaller the proportionality of the slope a2 (= kr2) (the larger the absolute value). Here, the coefficients kr1 and kr2 can use values determined in advance through experiments or analysis. For example, the coefficient kr1 can use the values 0.000075, 0.00008, 0.000085, and the like. As the coefficient kr2, a value 0.000095, a value 0.0001, a value 0.000105, or the like can be used. In general, it is considered that the driver pays more attention when the cruising distance L decreases than when the cruising distance L increases in order to prevent the vehicle from running out of electricity. Based on this, in the embodiment, the cruising range L is calculated by applying the rate process using the rate value Rt according to the subtraction value ΔL to the temporary cruising range Ltmp. As a result, when the cruising range L decreases, the cruising range L changes more rapidly than when the cruising range L increases, so that the driver can pay more attention. it can.

  FIG. 3 is an explanatory diagram showing an example of changes over time in the vehicle power consumption Ev, the power amount Wbsoc of the battery device, and the cruising range L. As shown in the figure, when the cruising distance L decreases until the time t1 and the cruising distance L increases after the time t1, the cruising distance L is more rapid in the former case than in the latter case. You can see that it changes. Thereby, it is possible to make the driver pay more attention.

  According to the electric vehicle 20 of the embodiment described above, the temporary cruising range Ltmp is calculated using the vehicle electric cost Ev and the storage ratios SOC1 and SOC2 of the batteries 36 and 40, and the calculated temporary cruising range Ltmp is calculated. In the case where the cruising range L is calculated by performing rate processing and the calculated cruising range L is displayed on the display unit 70, the previous cruising range (previous L) is subtracted from the temporary cruising range Ltmp as the rate processing. When the subtracted value ΔL obtained in this way is less than 0, the cruising range L is changed more quickly than when the subtracted value ΔL is greater than or equal to 0, so that the driver needs more attention. be able to.

  In the electric vehicle 20 of the embodiment, the rate value Rt is a positive value when the absolute value is smaller than the value 1 and the subtraction value ΔL is a negative value with respect to the absolute value of the same subtraction value ΔL. In comparison, the absolute value increases and the absolute value of the subtraction value ΔL increases so that the absolute value increases proportionally. However, the absolute value is in a range smaller than the value 1 and the same subtraction value ΔL It is sufficient that the absolute value is larger when the subtraction value ΔL is a negative value than the absolute value when the subtraction value ΔL is a negative value. It may be set so as to increase in a curve, or when the subtraction value ΔL is a positive value, a positive fixed value Rt1 is set, and when the subtraction value ΔL is a negative value, the absolute value is larger than the fixed value Rt1. The fixed value Rt2 may be set.

  In the electric vehicle 20 according to the embodiment, the cruising range L is calculated by performing the rate process on the tentative cruising range Ltmp, but the gradual change process other than the rate process, for example, the smoothing process, etc. is tentatively crushed. The cruising range L may be calculated by applying the cruising range Ltmp. When the cruising range L is calculated by performing the annealing process on the temporary cruising range Ltmp, for example, it can be calculated by the following equation (1) using the time constant τ. Here, the time constant τ may be a smaller value when the subtraction value ΔL is a negative value than when the subtraction value ΔL is a positive value. In this way, when the subtraction value ΔL is a negative value, the cruising range L can be changed more quickly than when the subtraction value ΔL is a positive value.

  L = previous L ・ τ + Ltmp ・ (1-τ) (1)

  In the electric vehicle 20 of the embodiment, the travel power cost Ed is the distance L1 traveled during the period of the electric power Wm [Wh] of the motor 32 when traveled for a predetermined time T1 (for example, 2 minutes, 3 minutes, 5 minutes, etc.). Although the value (Wm / L1) divided by [km] is used, this value (Wm / L1) is used as the temporary travel power cost Edtmp (i) and this temporary travel power cost Edtmp (i) and n1 times ( For example, an average value of the temporary travel power consumption Edtmp (i-1) to Edtmp (i-n1) of three times, five times, ten times, etc. may be used. Further, in the electric vehicle 20 of the embodiment, the air conditioning power consumption Eac travels during the predetermined time T2 (for example, 20 minutes, 30 minutes, 40 minutes, etc.) while the electric energy Wac [Wh] of the air conditioner 46 travels. The value (Wac / L2) divided by the distance L2 [km] is used, but this value (Wac / L2) is used as the temporary air-conditioning electricity cost Eactmp (j) and the temporary air-conditioning electricity cost Eactmp (i) and An average value of n2 times (for example, 2 times, 3 times, 5 times, etc.) of temporary air-conditioning electricity costs Eactmp (j−1) to Eactmp (j−n2) may be used.

  In the electric vehicle 20 according to the embodiment, the case where the battery and the inverter 34 (the motor 32) are shut off due to an abnormality occurring in any of the batteries 36 and 40 is not described. The cruising range L may be calculated by a different method. An example of the cruising range display control routine in this case is shown in FIG. This routine is the same as the routine of FIG. 2 except that the process of step S100b is executed instead of the process of step S100 and the processes of steps S132 and S134 are added. Therefore, the same process is given the same step number, and the detailed description thereof is omitted.

  In the cruising range display control routine of FIG. 4, the electronic control unit 50 first turns off the travel power cost Ed, the air conditioning power cost Eac, the power storage rates SOC1, SOC2, the relay 38 or the relay 42 of the batteries 36, 40 (battery 36). Alternatively, a process of inputting data such as a shut-off process flag Fso indicating whether or not to perform a shut-off process for disconnecting the battery 40 and the inverter 34 (motor 32) is executed (step S100b). The method for inputting the running electricity cost Ed, the air conditioning electricity cost Eac, and the storage ratios SOC1 and SOC2 of the batteries 36 and 40 has been described above. As for the shutoff process flag Fso, the value 1 is set to 1 when the shutoff process is executed, and the value written to the RAM 56 is read and inputted otherwise.

  When the data is input in this way, the vehicle power consumption Ev, the power amount Wbsoc of the battery device, and the temporary cruising distance Ltmp are calculated (steps S110 to S130), and the value of the cutoff processing flag Fso is checked (step S132). When the cutoff processing flag Fso is 0, the cruising distance L is calculated as in the embodiment (steps S140 to S180), and the calculated cruising distance L is displayed on the display unit 70 (step S190). This routine ends. On the other hand, when the cutoff processing flag Fso is 1, the temporary cruising range Ltmp is set to the cruising range L as it is (step S134), and the calculated cruising range L is displayed on the display unit 70 (step S190). This routine ends. That is, when the cutoff flag F is 1, the cruising range L is set and displayed on the display unit 70 without subjecting the temporary cruising range Ltmp to a gradual change process. FIG. 5 is an explanatory diagram showing an example of a change over time of the cruising distance L. In FIG. In the figure, the relay 38 or the relay 42 is turned off at time t2. By such processing, the driver can more easily understand that the number of batteries connected to the inverter 34 (motor 32) has changed from two to one.

  In the electric vehicle 20 of the embodiment, the sum of the travel power cost Ed and the air conditioning power cost Eac is calculated as the vehicle power cost Ev regardless of whether or not the air conditioning device 46 is operated. The vehicle power consumption Ev may be calculated in consideration of whether or not there is. An example of the cruising range display control routine in this case is shown in FIG. This routine is the same as the routine of FIG. 2 except that the process of step S100c is executed instead of the process of step S100 and the processes of steps S102 and S104 are added. Therefore, the same process is given the same step number, and the detailed description thereof is omitted.

  In the cruising range display control routine of FIG. 6, the electronic control unit 50 first indicates whether or not the travel power cost Ed, the air conditioning power cost Eac, the storage ratios SOC1 and SOC2 of the batteries 36 and 40, and the air conditioner 46 are operating. A process of inputting data such as the air conditioning flag Fac is executed (step S100c). The method for inputting the running electricity cost Ed, the air conditioning electricity cost Eac, and the storage ratios SOC1 and SOC2 of the batteries 36 and 40 has been described above. The air conditioner flag Fac is set to a value of 1 when the air conditioner 46 is in operation, and is set to a value of 0 when the air conditioner 46 is not in operation, and the data written in the RAM 56 is read and input.

  When the data is input in this way, the value of the air conditioning flag Fac is checked (step S102). When the air conditioning flag Fac is 1, the sum of the travel power cost Ed and the air conditioning power cost Eac is calculated as the vehicle power cost Ev (step S110). The process after step S120 is executed. On the other hand, when the air-conditioning flag Fac is 0, the travel electricity cost Ed is set as the vehicle electricity cost Ev (step S104), and the processes after step S120 are executed. In this way, when the air conditioner 46 is not operating, the vehicle power cost Ev is reduced (the power cost is improved) and the cruising distance L is a larger value than when the air conditioner 46 is operating. . Therefore, when the driver operates a switch (not shown) to turn off the air conditioner 46 (when the operation is stopped), the driver is notified that the cruising distance L is increased by the switch operation. be able to.

  In the electric vehicle 20 of the embodiment, the air conditioner 46 is considered as an electric device that operates using electric power from the electric power line 44 to which the batteries 36 and 40 are connected, but in addition to or instead of this, A DC / DC converter or the like that steps down the power from the power line 44 and supplies it to a low voltage system (for example, 12 V) to which an electronic control unit 50 or an auxiliary device (not shown) is connected may be considered. Further, in the electric vehicle 20 of the embodiment, the sum of the travel power cost Ed and the air conditioning power cost Eac is calculated as the vehicle power cost Ev. However, the travel power cost Ed is set as the vehicle power cost Ev without considering the air conditioning power cost Eac. It is good also as what to do.

  The electric vehicle 20 according to the embodiment includes the two batteries 36 and 40. However, the electric vehicle 20 may include one battery, or may include three or more batteries.

  In the embodiment, the present invention is applied to the electric vehicle 20 including the motor 32 that can input and output power to the drive shaft 22 connected to the drive wheels 26a and 26b, and the battery 36 that exchanges power with the motor 32. In addition to this, the present invention may be applied to a hybrid vehicle having an engine capable of outputting power to the drive shaft 22, and in addition to the hardware configuration of the hybrid vehicle, the system is connected to an external power source in the off state. Sometimes, it may be applied to a so-called plug-in electric vehicle or hybrid vehicle provided with a charger that charges the battery 36 using electric power from an external power source.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the motor 32 corresponds to a “motor”, the battery 36 corresponds to a “battery”, the display unit 70 corresponds to a “display unit”, and the electronic control unit 50 corresponds to a “display control unit”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of cruising range display devices.

  20 electric vehicle, 22 drive shaft, 24 differential gear, 26a, 26b drive wheel, 32 motor, 32a rotational position detection sensor, 34 inverter, 36, 40 battery, 37a, 41a voltage sensor, 37b, 41b current sensor, 37c, 41c Temperature sensor, 38, 42 relay, 44 power line, 46 air conditioner, 47 power sensor, 50 electronic control unit, 52 CPU, 54 ROM, 56 RAM, 58 flash memory, 60 ignition switch, 61 shift lever, 62 shift position sensor 63 accelerator pedal, 64 accelerator pedal position sensor, 65 brake pedal, 66 brake pedal position sensor, 68 vehicle speed sensor, 70 display unit.

Claims (3)

A cruising distance display device that is mounted on an electric vehicle including a traveling motor and at least one battery that exchanges electric power with the motor, and displays a cruising distance of the vehicle on a display unit,
A temporary cruising distance is calculated using a vehicle electricity cost and a storage ratio of the at least one battery, a gradual change process is performed on the calculated temporary cruising distance, a cruising distance is calculated, and the calculated cruising distance Comprising a display control means for displaying a possible distance on the display unit;
The slow change process uses a larger rate value when the calculated temporary cruising distance is less than the previous cruising distance and compared to when the calculated temporary cruising distance is greater than or equal to the previous cruising distance . A process for changing the cruising range by the rate processing or a process for changing the cruising range by a smoothing process using a small time constant,
In the slow change process, as the difference between the calculated temporary cruising distance and the previous cruising distance is larger, a process of changing the cruising distance by a rate process using a larger rate value or a smaller time constant is used. It is a process that changes the cruising range by the process.
A cruising range display device. A cruising distance display device that is mounted on an electric vehicle including a traveling motor and at least one battery that exchanges electric power with the motor, and displays a cruising distance of the vehicle on a display unit,
A temporary cruising distance is calculated using a vehicle electricity cost and a storage ratio of the at least one battery, a gradual change process is performed on the calculated temporary cruising distance, a cruising distance is calculated, and the calculated cruising distance Comprising a display control means for displaying a possible distance on the display unit;
The slow change process uses a larger rate value when the calculated temporary cruising distance is less than the previous cruising distance and compared to when the calculated temporary cruising distance is greater than or equal to the previous cruising distance . A process for changing the cruising range by the rate processing or a process for changing the cruising range by a smoothing process using a small time constant,
The electric vehicle includes a plurality of the batteries, and further includes a plurality of relays that respectively connect and disconnect the plurality of batteries and the motor.
The display control means is means for setting the calculated temporary cruising range as a cruising range when shutting off any of a plurality of batteries and the motor.
A cruising range display device. A cruising range display device according to claim 1 or 2 ,
The electric vehicle is a vehicle including an electric device that operates using electric power from the battery,
The display control means is a means for calculating a vehicle power consumption using a power consumption for traveling when traveling for a first predetermined time and a power consumption for the electric device when traveling for a second predetermined time. ,
A cruising range display device.

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