JP5848218B2 - Range display device - Google Patents

Description

  The present invention relates to a cruising range display device, and in particular, an electric motor including a traveling motor, a battery that exchanges electric power with the motor, and an air conditioner that performs air conditioning in a vehicle interior using electric power from the battery. The present invention relates to a cruising distance display device that is mounted on a vehicle and calculates a cruising distance of the vehicle using a power consumption for traveling, a power consumption of an air conditioner, and a storage ratio of a battery, and displays it on a display unit.

  Conventionally, as this type of cruising range display device, a drive motor, a high voltage battery that exchanges power with the drive motor, and an air conditioner that can be operated using the power from the high voltage battery are provided. The first power consumption rate is calculated based on the travel distance of the vehicle in a predetermined period and the power consumption of the drive motor, and the travel distance of the vehicle in the predetermined period, the drive motor, and the air conditioner The second power consumption rate is calculated based on the power consumption, and the first travelable distance corresponding to the stopped state of the air conditioner is calculated based on the remaining power amount of the high-voltage battery and the first power consumption rate. And calculating the second travelable distance corresponding to the operating state of the air conditioner based on the remaining power amount of the high voltage battery and the second power consumption rate, and the first travel distance is determined according to the operation signal from the switch of the air conditioner. Run Distance or one to print the second travelable distance in the display unit has been proposed (e.g., see Patent Document 1). In this device, by calculating the first power consumption rate and the second power consumption regardless of the operating status of the air conditioner, the first travelable distance can be quickly calculated when the air conditioner is switched to the stopped state. When the air conditioner is switched to the operating state, the second travelable distance can be calculated quickly.

JP 2010-226975 A

  In such a cruising distance display device, it is preferable that the cruising distance can be calculated more accurately. For this reason, when calculating the travelable distance using the power consumption of the drive motor, the power consumption of the air-conditioning equipment, and the remaining power amount of the high-voltage battery, the calculation conditions and air-conditioning equipment for calculating (updating) the power consumption of the drive motor The problem is how to set the calculation conditions for calculating (updating) the power consumption.

  The main object of the cruising range display device of the present invention is to calculate the cruising range more accurately.

  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,
An electric vehicle equipped with a traveling motor, a battery that exchanges electric power with the motor, and an air conditioner that performs air conditioning in the vehicle interior using the electric power from the battery. A cruising distance display device that calculates the cruising distance of a vehicle using the power consumption of the device and the storage ratio of the battery and displays it on the display unit,
When the first calculation condition is satisfied, the power consumption of the air conditioner is calculated, and when the second calculation condition having a higher establishment frequency than the first calculation condition is satisfied, the travel power consumption is reduced. Various electricity cost calculation means to calculate,
It is a summary to provide.

  In the cruising range display device of the present invention, when the first calculation condition is satisfied, the power consumption of the air conditioner is calculated (updated), and the second calculation having a higher establishment frequency than the first calculation condition. When the condition is satisfied, the power consumption for driving is calculated (updated). In general, the power consumption for driving depends on the driving state and the driving environment of the driver, and thus is considered to be more likely to fluctuate than the power consumption of the air conditioner. Therefore, by setting the second calculation condition to be established more frequently than the first calculation condition, the power consumption calculation frequency (update frequency) for traveling is changed to the power consumption calculation frequency (update frequency) of the air conditioner. ) And the cruising range can be calculated with higher accuracy. Here, the “cruising distance” means a distance (cruising distance) that can be traveled with the 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 various power consumption calculation means determine whether or not the first calculation condition is satisfied by using n1 parameters whose values increase with the continuation of travel. It is also possible to determine whether or not the second calculation condition is satisfied by using n2 parameters that increase in value as the continuation of n2 increases. Here, parameters whose values increase as the vehicle continues to travel include time, distance traveled, and the battery storage ratio. In the cruising range display device of this aspect of the present invention, the various power consumption calculation means determine that the first calculation condition is satisfied when the first predetermined time has elapsed, and the second predetermined time has elapsed. It may be a means for determining that the second calculation condition is satisfied when the battery travels for a predetermined travel distance or the storage ratio of the battery changes by a predetermined change amount. In this case, the second predetermined time may be shorter than the first predetermined time.

  In the cruising range display device according to the present invention, the various power consumption calculation means may determine whether or not the first calculation condition is established by comparing a predetermined parameter whose value increases with the continuation of travel and a first threshold value. It is also possible to determine whether or not the second calculation condition is satisfied by comparing the predetermined parameter with a second threshold value smaller than the first threshold value. . Here, the predetermined parameter may be time.

  Furthermore, in the cruising range display device of the present invention, the various power consumption calculation means calculate the power consumption of the air conditioner not only when the first calculation condition is satisfied but also when the vehicle is turned off. It can also be a means to do. By doing so, it is possible to further secure an opportunity to calculate the power consumption of the air conditioner.

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 a flowchart which shows an example of the various electricity consumption calculation routines performed by the electronic control unit 50 of an Example. It is explanatory drawing which shows an example of the relationship between the vehicle electric power cost Ev in the calculation conditions of the travel electric power cost Ed, and the time required until the calculation conditions are satisfied. It is a flowchart which shows an example of the ignition-off time air-conditioning electricity cost calculation routine performed by the electronic control unit 50 when the ignition is turned off.

  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. The inverter 34, a battery 36 configured as, for example, a lithium ion secondary battery and exchanges power with the motor 32 via the inverter 34, and a power supply 38 from the power line 38 to which the inverter 34 and the battery 36 are connected. An air conditioner 40 that performs air conditioning in the passenger compartment, a vehicle-side connector 48 that is connected to an external power-side connector 102 of an AC external power source (for example, a household power source (AC100V)) 100 that is a power source outside the vehicle, The battery 36 is charged when the vehicle-side connector 48 and the external power supply-side connector 102 are connected while the system is stopped. Includes a charger 46 as possible, a display unit 70 which is located near the driver's seat to display the traveling enable distance, the electronic control unit 50 that controls the whole vehicle, the. In the embodiment, the display unit 70 and the electronic control unit 50 correspond to a cruising range display device.

  Although not shown, the charger 46 is a relay that connects and disconnects the power line 38 and the vehicle-side connector 48, an AC / DC converter that converts AC power from the external power supply 100 into DC power, and an AC / DC converter. Thus, a DC / DC converter or the like that converts the voltage of the converted DC power and supplies it to the power line 38 is provided.

  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. The phase current from the current sensor, the inter-terminal voltage Vb from the voltage sensor 37a attached between the terminals of the battery 36, the charge / discharge current Ib from the current sensor 37b attached to the output terminal of the battery 36, and the battery 36. From the connection detection sensor 49 that detects the battery temperature Tb from the temperature sensor 37c, the power consumption Pac of the air conditioner 40 from the power sensor 41 attached to the air conditioner 40, and the connection between the vehicle side connector 48 and the power supply side connector 102. Connection detection signal, ignition signal from the ignition switch (start switch) 60, A shift position SP from the shift position sensor 62 that detects the operation position of the ft lever 61, an accelerator opening Acc from the accelerator pedal position sensor 64 that detects the depression amount of the accelerator pedal 63, and a brake pedal that detects the depression amount of the brake pedal 65 The brake pedal position BP from the position sensor 66, 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 40, a control signal to the charger 46, a control signal to the display unit 70, and the like are output via the output port. It is output. 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 charge / discharge current Ib of the battery 36 detected by the sensor 37b, the storage ratio SOC, which is the ratio of the amount of power that can be discharged from the battery 36 at that time to the total capacity, is calculated, or the calculated storage ratio SOC and the battery temperature Based on Tb, input / output limits Win and Wout, which are the maximum allowable power that may charge / discharge the battery 36, are calculated.

  In the electric vehicle 20 of the embodiment, the shift position SP detected by the shift position sensor 62 includes a parking position (P position), a neutral position (N position), a drive position (D position), a reverse position (R position), and the like. is there.

  In the thus configured electric vehicle 20 of the embodiment, the electronic control unit 50 sets the required torque Tr * to be output to the drive shaft 22 in accordance with the accelerator opening Acc and the vehicle speed V, and limits the input / output of the battery 36. By dividing Win and Wout by the rotational speed Nm of the motor 32, torque limits Tmin and Tmax are set as upper and lower limits of the torque that may be output from the motor 32, and the required torque Tr * is limited by the torque limits Tmin and Tmax. Then, a torque command Tm * as a torque to be output from the motor 32 is set, and switching control of the switching element of the inverter 34 is performed so that the motor 32 is driven by the set torque command Tm *.

  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” means a distance (cruising distance) that can be traveled with the amount of electric power that can be discharged from the battery 36. 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 sets data such as the travel power cost Ed as the travel power cost, the air conditioning power cost Eac as the power cost of the air conditioner 40, and the power storage rate SOC of the battery 36. Is input (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. As the traveling power cost Ed and the air conditioning power cost Eac, those calculated by various power cost calculation routines described later are input. As the storage ratio SOC of the battery 36, a value calculated based on the charge / discharge current Ib of the battery 36 detected by the current sensor 37b is input.

  When the data is input in this way, the sum of the input traveling power cost Ed and air conditioning power cost Eac is calculated as the vehicle power cost Ev (step S110), and the power storage ratio SOC of the battery 36 is multiplied by the conversion factor ke to calculate the power storage ratio of the battery 36. The SOC [%] is converted into the electric energy Wbsoc [Wh] that can be discharged from the battery 36 (step S120). Then, the cruising range Lcd is calculated by dividing the electric energy Wbsoc of the battery 36 by the vehicle power consumption Ev (step S130), and the calculated cruising range Lcd is displayed on the display unit 70 (step S140). Exit. Here, the conversion coefficient ke is determined based on the total capacity of the battery 36 and the like.

  Next, a process for calculating the travel electricity cost Ed and the air conditioning electricity cost Eac used in the cruising range display control routine of FIG. 2 will be described. FIG. 3 is a flowchart illustrating an example of various power consumption calculation routines executed by the electronic control unit 50 of the embodiment. This routine is repeatedly executed at predetermined time intervals (for example, every several milliseconds) in parallel with the cruising range display control routine of FIG.

  When various power consumption calculation routines are executed, the electronic control unit 50 firstly calculates the storage ratio SOC of the battery 36 calculated based on the charge / discharge current Ib of the battery 36 from the current sensor 37b, the air conditioner from the power sensor 41. A process of inputting data such as 40 power consumption Pac, travel power Pd as travel power, times tac, td, travel distances Lac, Ld is executed (step S200). Here, the traveling power Pd is obtained from the charge / discharge power Pb of the battery 36 obtained from the product of the inter-terminal voltage Vb of the battery 36 from the voltage sensor 37a and the charge / discharge current Ib of the battery 36 from the current sensor 37b. The power consumption Pac is calculated to be inputted. The traveling power Pd may be calculated using the product of the torque command Tm * of the motor 32 and the rotation speed Nm. The time tac and the travel distance Lac start timing when the ignition is turned on. After that, when the air conditioning power consumption Eac is calculated (updated), the time tac and the travel distance Lac are reset to a value of 0 to start counting and re-measurement. The current time and travel distance are entered. The time td and the travel distance Ld are started to be measured and measured when the ignition is turned on, and then reset to the value 0 when the travel power consumption Ed is calculated (updated), and re-measurement and re-measurement are started. The current time and travel distance are entered.

  When the data is input in this way, the travel power integrated value Pdsum is calculated (updated) in addition to the travel power integrated value (previous Pdsum) calculated when the routine was executed last time, and the travel power Pd is calculated (updated) (step S210). In addition to the air conditioning power integrated value (previous Pacsum) calculated when the routine was executed last time, the air conditioning power integrated value Pacsum is calculated (updated) (step S220). Here, the running power integrated value Pdsum and the air conditioning power integrated value Pacsum are reset to a value of 0 when the ignition is turned on (system activation) or when the running power cost Ed and the air conditioning power cost Eac are calculated (updated), respectively.

  Subsequently, a difference between the storage ratio SOC of the battery 36 and the storage ratio reference value SOCset (absolute value obtained by subtracting the storage ratio reference value SOC from the storage ratio SOC) is calculated as the storage ratio change amount ΔSOC (step S230). Here, the storage ratio reference value SOCset is set to the storage ratio SOC at that time when the ignition is turned on, and then the storage ratio SOC at that time is set when the travel power consumption Ed is calculated (updated). .

  Next, it is determined whether or not a calculation condition (update condition) for the air conditioning power consumption Eac is satisfied (step S240). In this embodiment, this determination is made by determining whether the time tac is equal to or longer than the predetermined time tacref. Here, as the predetermined time tacref, for example, 20 minutes, 30 minutes, 40 minutes, or the like can be used.

  When the time tac is equal to or longer than the predetermined time tacref, it is determined that the calculation condition of the air conditioning power consumption Eac is satisfied, the air conditioning power integrated value Pacsum is divided by the travel distance Lac, and the section air conditioning power consumption Eacbd [i ] (Step S250), and as shown in the following equation (1), the calculated section air conditioning power consumption Eacbd [i] and n times so far (n is an integer of 2 or more, for example, value 5 or value 7, An average value of the section air-conditioning electricity costs Eacbd [i-1] to Eacbd [i-n] of the value 10 or the like is calculated as the air-conditioning electricity cost Eac (step S260). Here, the current air conditioning power consumption calculation section corresponds to the time until the air conditioning power consumption Eac calculation condition is satisfied this time after the calculation condition of the air conditioning power consumption Eac is satisfied after the ignition is turned on. Then, the time tac and the travel distance Lac are reset to the value 0, and the retime and the remeasurement are started (step S270), and the air conditioning power integrated value Pacsum is reset to the value 0 (step S280). In this way, the air conditioning power consumption Eac is calculated (updated) when the calculation condition for the air conditioning power consumption Eac is satisfied.

  Eac = (Eacbd [i] + Eacbd [i-1] + ... + Eacbd [i-n]) / (n + 1) (1)

  On the other hand, when the time tac is less than the predetermined time tacref in step S240, it is determined that the calculation condition for the air conditioning power consumption Eac is not satisfied, and the processing of steps S250 to S280 is not executed. In this case, the air-conditioning electricity cost Eac calculated in step S260 is held.

  Next, it is determined whether or not a calculation condition (update condition) for the travel electricity cost Ed is satisfied (steps S290 to S310). In this embodiment, in the embodiment, whether or not the time td is equal to or longer than the predetermined time tdref shorter than the predetermined time tacref (step S290), whether or not the traveling distance Ld is equal to or longer than the predetermined distance Ldref (step S300), The determination is made by determining whether or not the change amount is greater than or equal to the predetermined change amount ΔSOCref (step S310). Here, for example, 2 minutes, 3 minutes, 5 minutes, or the like can be used as the predetermined time tdref. Moreover, 2 km, 3 km, 5 km, etc. can be used for the predetermined distance Ldref, for example. Further, for example, 2%, 3%, 5%, or the like can be used as the predetermined change amount ΔSOCref.

  When the time td is equal to or longer than the predetermined time tdref, when the travel distance Ld is equal to or greater than the predetermined distance Ldref, and when the power storage ratio change amount ΔSOC is equal to or greater than the predetermined change amount ΔSOCref, it is determined that the calculation condition for the travel power cost Ed is satisfied. The electric power integrated value Pdsum is divided by the travel distance Ld to calculate a section travel power cost Edbd [j] in the current travel power cost calculation section (step S320), and the calculated travel power cost Edbd is calculated as shown in the following equation (2). The average value of [j] and the m times (m is an integer of 2 or more, for example, value 5, value 7, value 10, etc.) traveling power consumption Edbd [j-1] to Edbd [jm] It is calculated as the travel electricity cost Ed (step S330). Here, the current travel electricity cost calculation section corresponds to the time from when the ignition is turned on or the previous time when the travel power cost Ed calculation condition is satisfied to the time when the travel power cost Ed calculation condition is satisfied. Then, the time td and the travel distance Ld are reset to the value 0, and re-time and re-measurement are started (step S340), the storage ratio SOC of the battery 36 is set to the storage ratio reference value SOCset (step S350), and the travel power The integrated value Pdsum is reset to 0 (step S360), and this routine ends. In this way, the travel power cost Eac is calculated (updated) when the calculation condition for the travel power cost Ed is satisfied.

  Ed = (Edbd [j] + Edbd [j-1] + ... + Edbd [j-m]) / (m + 1) (2)

  On the other hand, when the time td is less than the predetermined time tdref, the travel distance Ld is less than the predetermined distance Ldref, and the storage ratio change amount ΔSOC is less than the predetermined change amount ΔSOCref in steps S290 to S310, the calculation condition for the travel electricity cost Ed is satisfied. The routine is terminated without executing steps S320 to S360. In this case, the travel power cost Ed calculated in step S330 is held last.

  FIG. 4 is an explanatory diagram showing an example of the relationship between the vehicle power cost Ev in the calculation condition of the travel power cost Ed and the time required until the calculation condition is satisfied. Note that the time required for the travel distance Ld to reach the predetermined distance Ldref varies depending on the road gradient or the like, and is simply not a relationship between the vehicle power consumption Ev and the time required for the calculation condition to be satisfied. . As shown by the broken line in FIG. 4, the time until the time td reaches the predetermined time tdref is constant regardless of the vehicle power consumption Ev. Further, as shown by the two-dot chain line in FIG. 4, the time until the power storage ratio change amount ΔSOC reaches the predetermined change amount ΔSOCref becomes shorter as the vehicle power consumption Ev is larger (bad). This is because the storage rate SOC of the battery 36 is likely to change when the vehicle power consumption Ev is large. Therefore, in the example of FIG. 4, the calculation condition of the travel electricity cost Ed is established by the time td reaching the predetermined time tdref when the vehicle electricity cost Ev is relatively small (good) as shown by the solid line. When it is relatively large (bad), it is established when the power storage ratio change amount ΔSOC reaches the predetermined change amount ΔSOCref. Therefore, the update frequency of the travel electricity cost Ed can be made higher than that using only the condition that the time td reaches the predetermined time tdref as the calculation condition of the travel electricity cost Ed. That is, the travel electricity cost Ed can be updated at a frequency according to the driver's accelerator operation or travel environment.

  In the embodiment, the condition that the time tac is equal to or greater than the predetermined time tacref is used as the calculation condition of the air conditioning power consumption Eac, and the time td is equal to or greater than the predetermined time tdref that is shorter than the predetermined time tacref. A certain condition, a condition that the travel distance Ld is equal to or greater than the predetermined distance Ldref, and a condition that the power storage ratio change amount ΔSOC is equal to or greater than the predetermined change amount ΔSOCref are used. That is, the respective calculation conditions are set so that the calculation condition of the travel electricity cost Ed is higher than the calculation condition of the air-conditioning electricity cost Eac. Thereby, the update frequency of the travel electricity cost Ed can be made higher than the update frequency of the air conditioning power cost Eac. In general, it is considered that the travel electricity cost Ed is more likely to fluctuate than the air conditioning power cost Eac. Therefore, the cruising distance Lcd is more accurate by increasing the update frequency of the travel electricity cost Ed compared to the update frequency of the air conditioning power cost Eac. Can be calculated well.

  According to the electric vehicle 20 of the embodiment described above, the cruising distance Lcd is calculated on the basis of the travel power cost Ed, the air conditioning power cost Eac, and the storage ratio SOC of the battery 36 and displayed on the display unit 70. Since each calculation condition is set so that the calculation condition of Ed is higher than the calculation condition of the air conditioning power consumption Eac, the update frequency of the traveling power consumption Ed should be higher than the update frequency of the air conditioning power consumption Eac. Can do. Thereby, the cruising range Lcd can be calculated with higher accuracy.

  In the electric vehicle 20 of the embodiment, it is determined that the calculation condition of the air conditioning power consumption Eac is satisfied when the time tac is equal to or longer than the predetermined time tacref, and when the time td is equal to or longer than the predetermined time tdref shorter than the predetermined time tacref or the travel distance Ld is When the power storage ratio change amount ΔSOC is equal to or greater than the predetermined change amount ΔSOCref when the predetermined distance Ldref is greater than or equal to the predetermined distance Ldref, it is determined that the calculation condition for the travel electricity cost Ed is satisfied. It is good also as what. That is, the number of travel power consumption calculation condition parameters (three in the embodiment) as parameters used for determining whether or not the calculation condition for the travel power consumption Ed is satisfied is determined whether or not the calculation condition for the air conditioning power consumption Eac is satisfied. When the number of air conditioning power consumption calculation condition parameters (one in the embodiment) is increased as a parameter used for the parameter, the threshold values for the common parameter (time in the embodiment) may be the same value. Further, when the number of travel power consumption calculation condition parameters is increased as compared with the number of air conditioning power consumption calculation condition parameters, the travel power consumption calculation condition parameters include two of time td, travel distance Ld, and storage rate change amount ΔSOC. It may be used, or other parameters may be used instead of at least a part of them, and the air-conditioning power consumption calculation condition parameter may be replaced by the travel distance Lac or the power storage ratio change amount ΔSOCac instead of the time tac. Etc. may be used. The storage ratio change amount ΔSOCac can be calculated as the difference between the storage ratio SOC of the battery 36 and the storage ratio reference value SOCsetac, similarly to the storage ratio change amount ΔSOC. Here, as the storage ratio reference value SOCsetac, the storage ratio SOC at that time is set when the ignition is turned on, and then the storage ratio SOC at that time is set when the air conditioning power consumption Eac is calculated (updated). .

  In the electric vehicle 20 of the embodiment, it is determined that the calculation condition of the air conditioning power consumption Eac is satisfied when the time tac is equal to or longer than the predetermined time tacref, and when the time td is equal to or longer than the predetermined time tdref shorter than the predetermined time tacref or the travel distance Ld is When the power storage ratio change amount ΔSOC is equal to or greater than the predetermined change amount ΔSOCref when the predetermined distance Ldref is greater than or equal to the predetermined distance Ldref, it is determined that the calculation condition for the travel power consumption Ed is satisfied. When the time is shorter than tac, it is determined that the condition for calculating the travel electricity cost Ed is satisfied when the time td is equal to or longer than the predetermined time tdref shorter than the predetermined time tacref regardless of the travel distance Ld and the power storage ratio change amount ΔSOC. It is good. That is, it is determined whether or not a condition for calculating the air conditioning power consumption Eac is satisfied by comparing a predetermined parameter (time, travel distance, amount of change in power storage ratio, etc.) whose value increases with the continuation of the travel and the first threshold value. When it is determined whether or not the calculation condition of the travel electricity cost Ed is satisfied by comparing the predetermined parameter with the second threshold value smaller than the first threshold value, the number of parameters (for example, one) is set between the former and the latter. They may be the same.

  In the electric vehicle 20 of the embodiment, the travel distance Lac used for the calculation of the section air conditioning power consumption Eacbd [i] starts to be measured when the ignition is turned on, and then becomes 0 when the air conditioning power consumption Eac is calculated (updated). The current value of the travel distance at which resetting and re-measurement is started is used, but a value obtained as the product of time tac and average vehicle speed Vave when calculating the section air-conditioning power consumption Eacbd [i] is used. It may be a thing. The average vehicle speed Vave of the vehicle uses, for example, a value obtained by dividing the travel distance Ld at the time td when the calculation condition of the travel power cost Ed is satisfied (when the travel power cost Ed is calculated). be able to.

  In the electric vehicle 20 of the embodiment, the average value of the section air conditioning power costs Eacbd [i] to Eacbd [in] is calculated as the air conditioning power expenses Eac, but the section air conditioning power expenses Eacbd [i] are directly used as the air conditioning power expenses Eac. It may be set. Further, in the hybrid vehicle 20 of the embodiment, the average value of the section travel power costs Edbd [j] to Edbd [j−m] is calculated as the travel power cost Ed, but the section travel power costs Edbd [i] are directly used as the travel power costs. It may be set as Ed.

  In the electric vehicle 20 of the embodiment, when the time tac is equal to or greater than the predetermined time tacref, it is determined that the calculation condition of the air conditioning power consumption Eac is satisfied, and the air conditioning power integrated value Pacsum is divided by the travel distance Lac to obtain the section air conditioning power consumption Eacbd [ i] is calculated, but in addition to this, the section air-conditioning power consumption Eacbd [i] may be calculated when the ignition is turned off. FIG. 5 is a flowchart showing an example of an ignition-off-time air conditioning power consumption calculation routine executed by the electronic control unit 50 when the ignition is turned off.

  When the ignition-off-time air conditioning power consumption calculation routine is executed, the electronic control unit 50 first executes a process of inputting data such as time tac, travel distance Lac, and air conditioning power integrated value Pacsum (step S400). Here, the time tac and the travel distance Lac are input in the same manner as the various power consumption calculation routines of FIG. In addition, as the air conditioning power integrated value Pacsum, the value (latest value) calculated in step S310 of various power consumption calculation routines in FIG. 3 is input.

  When the data is input in this way, based on the input time tac and the air conditioning power integrated value Pacsum, as the air conditioning power integrated value Pacsum when the calculation condition of the air conditioning power consumption Eac is satisfied (when the time tac becomes the predetermined time tacref). The air conditioning power integrated value Pacsum1 when the condition is satisfied is estimated (step S410), the estimated air conditioning power integrated value Pacsum1 when the condition is satisfied is divided by the travel distance Lac, and the section air conditioning power consumption Eacbd [i] is calculated (step S420). The average value of the air conditioning power consumption Eacbd [i] to Eacbd [i−n] is calculated as the air conditioning power consumption Eac (step S430), and this routine ends. Here, in the embodiment, the estimated air-conditioning power integrated value Pacsum1 when the condition is satisfied is determined by previously determining the relationship between the time tac, the air-conditioning power integrated value Pacsum, and the air-conditioning power integrated value Pacsum1 when the condition is satisfied in advance through experiments and analysis. This is stored in the ROM 54 as a time air conditioning power integrated value estimation map, and when the time tac and the air conditioning power integrated value Pacsum are given, the corresponding air conditioning power integrated value Pacsum1 when the condition is satisfied is derived from the stored map and set. It was. In addition, in the estimation of the air conditioning power integrated value Pacsum1 when the condition is satisfied, the outside air temperature or the like may be considered in addition to the time tac and the air conditioning power integrated value Pacsum.

  As described above, when the ignition is turned off, by calculating the section air-conditioning power consumption Eacbd [i] and the air-conditioning power consumption Eac, the time of one trip (from ignition on to ignition off) is short (when less than the predetermined time tacref). ) And the like, it is possible to secure an opportunity to calculate the section air conditioning power consumption Eacbd [i] and the air conditioning power consumption Eac. That is, the opportunity to calculate the section air-conditioning electricity cost Eacbd [i] and the air-conditioning electricity cost Eac can be further secured. When the ignition is turned off, it is not necessary to display the cruising distance Lcd on the display unit 70, and therefore the air conditioning power consumption Eac may not be calculated (the process of step S430 is not executed).

  In the electric vehicle 20 according to the embodiment, the case where the vehicle side connector 48 and the external power source side connector 102 are connected to charge the battery 36 when the ignition is turned on (when the system is started) or when the system is stopped is described. However, in these cases, the average value of the section air-conditioning electricity costs Eacbd [i] to Eacbd [i−n] calculated so far is calculated as the air-conditioning electricity cost Eac and the traveling electricity costs Edbd [j] to Eddbd calculated so far are calculated. The average value of [j−m] may be calculated as the travel power cost Ed, and the cruising distance Lcd may be calculated using the air conditioning power cost Eac and the travel power cost Ed.

  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 40 is operating. The sum of the travel power cost Ed and the air conditioning power cost Eac may be calculated as the vehicle power cost Ev, and the travel power cost Ed may be set as the vehicle power cost Ev when the air conditioner 40 is not operating.

  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 including an engine capable of outputting power to the drive shaft 22.

  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 the “motor”, the battery 36 corresponds to the “battery”, the air conditioner 40 corresponds to the “air conditioner”, the display unit 70 corresponds to the “display unit”, and electronic control is performed. The unit 50 corresponds to “various power consumption calculation means”.

  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 battery, 37a voltage sensor, 37b current sensor, 37c temperature sensor, 38 power line, 40 Air conditioner, 41 Power sensor, 46 Battery charger, 48 Vehicle side connector, 49 Connection detection 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, 100 External power supply, 102 External power supply side Connector.

Claims (3)

An electric vehicle equipped with a traveling motor, a battery that exchanges electric power with the motor, and an air conditioner that performs air conditioning in the vehicle interior using the electric power from the battery. A cruising distance display device that calculates the cruising distance of a vehicle using the power consumption of the device and the storage ratio of the battery and displays it on the display unit,
When the first calculation condition is satisfied, the power consumption of the air conditioner is calculated, and when the second calculation condition having a higher establishment frequency than the first calculation condition is satisfied, the travel power consumption is reduced. Various electricity cost calculation means to calculate,
Equipped with a,
The various power consumption calculation means determine that the first calculation condition is satisfied when a first predetermined time has elapsed, and whether the second predetermined time has elapsed or the vehicle has traveled for a predetermined travel distance is stored in the battery Means for determining that the second calculation condition is satisfied when the ratio changes by a predetermined change amount;
A cruising range display device. The cruising range display device according to claim 1 ,
The second predetermined time is shorter than the first predetermined time.
A cruising range display device. An electric vehicle equipped with a traveling motor, a battery that exchanges electric power with the motor, and an air conditioner that performs air conditioning in the vehicle interior using the electric power from the battery. A cruising distance display device that calculates the cruising distance of a vehicle using the power consumption of the device and the storage ratio of the battery and displays it on the display unit,
When the first calculation condition is satisfied, the power consumption of the air conditioner is calculated, and when the second calculation condition having a higher establishment frequency than the first calculation condition is satisfied, the travel power consumption is reduced. Various electricity cost calculation means to calculate,
Equipped with a,
The various power consumption calculation means are means for calculating the power consumption of the air conditioner when the vehicle is turned off in addition to when the first calculation condition is satisfied.
A cruising range display device.

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