JP5261838B2 - Electric vehicle control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller of an electric vehicle, which is capable of exchanging an auxiliary battery with the other vehicle during traveling when power of the auxiliary battery is lowered. <P>SOLUTION: The controller of the electric vehicle includes: a main battery which supplies power to a motor; the detachable auxiliary battery; a boosting and step-down transformer which steps down the power supplied from a driving system circuit to supply the same to the auxiliary battery and boosts the power supplied from the auxiliary battery to supply the same to the driving system circuit; a battery control part which monitors the remaining capacity of the main battery and auxiliary battery and controls their charge and discharge, respectively; and a communication device capable of communication with an integration center. The battery control part switches, based on a user's instruction, a target value of the remaining capacity of the auxiliary battery between a first value and a second value which is larger than the first value and includes a battery memory part which memorizes a state of the auxiliary battery. The communication device transmits information on the auxiliary battery to the integration center when the remaining capacity of the auxiliary battery, which is memorized in the battery memory part, is equal to or more than the second value. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a control device for an electric vehicle.

  2. Description of the Related Art Conventionally, an electric vehicle that travels using electric energy supplied from a battery mounted on the vehicle is known (see, for example, Patent Document 1). The electric vehicle in Patent Document 1 includes a detachable cartridge battery in addition to a main battery fixed to the vehicle, and supplies the electric power of the cartridge battery to the electric motor when the electric power of the main battery is used up. It is possible to run by.

JP 2010-108833 A

  In the electric vehicle described in Patent Document 1, when the electric power of both the main battery and the cartridge battery is used up while running, charging can be performed at the nearest dealer or the cartridge mounted on the own vehicle. By installing another charged cartridge battery instead of the battery, the vehicle can run again. However, more power is required to travel to the dealer, and it may take time depending on the distance to the dealer.

  Here, if the cartridge battery mounted on another electric vehicle traveling in the vicinity and the cartridge battery mounted on the own vehicle can be exchanged, there is no need to continue traveling to the store with a battery with a small remaining capacity. In addition, since it is possible to approach the host vehicle from the other vehicle side, quick replacement is possible. Reference 1 does not describe a system for exchanging a battery with another electric vehicle that is running.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electric vehicle capable of exchanging the auxiliary battery with another running vehicle when the power of the auxiliary battery of the host vehicle is reduced. It is to provide a control device.

  In order to achieve the above object, a first aspect of the invention relates to a main battery (for example, a high voltage in an embodiment to be described later) that supplies electric power to a motor (for example, a motor 2 in an embodiment to be described later) via a drive system circuit. A main battery 4), a detachable auxiliary battery (for example, a low voltage 1 sub-battery 6 in an embodiment described later) for supplying electric power to an electric device inside the vehicle, and electric power supplied from the drive system circuit are stepped down. A step-up / down converter (for example, a first DC / DC converter 5 in an embodiment to be described later) and a main battery that boosts the power supplied from the auxiliary battery and supplies the boosted power to the drive system circuit. And a battery control unit that monitors the remaining capacity of the auxiliary battery and controls each charge / discharge (for example, in an embodiment described later). Vehicle system control device ECU 20) and a communication device capable of communicating with the general center (for example, a communication device 32 in an embodiment described later), wherein the battery control unit includes: Based on a user command, a battery storage unit (for example, storing the state of the auxiliary battery by switching the target value of the remaining capacity of the auxiliary battery between a first threshold value and a second threshold value larger than the first threshold value) A battery storage unit 42) in the embodiment described later, and the communication device displays information on the auxiliary battery when the remaining capacity of the auxiliary battery stored in the battery storage unit is equal to or greater than the second threshold value. It transmits to the said control center, It is characterized by the above-mentioned.

  According to a second aspect of the present invention, in the electric vehicle control device according to the first aspect, after the communication device transmits information on the auxiliary battery to the general center, the rescue request information for requesting the auxiliary battery is provided. When acquired from the general center, the communication device transmits the presence / absence of the user's intention to rescue to the general center in response to the user's command.

  The invention according to claim 3 is the electric vehicle control device according to claim 2, further comprising a navigation system (for example, a navigation system 34 in an embodiment described later), wherein the rescue request information requests the auxiliary battery. When the communication device includes the rescue point information related to the rescue point, and the communication device acquires the rescue request information from the general center, the navigation system uses the remaining capacity of the main battery only for the purpose via the rescue point. It is characterized by determining whether it is possible to arrive at the ground.

  The invention according to claim 4 is the electric vehicle control device according to claim 3, wherein the communication device requests an auxiliary battery when the communication device transmits to the general center that the user has an intention to rescue. Whether to disclose the current location information of the user to the requester is transmitted to the general center according to the user's command.

  According to a fifth aspect of the present invention, in the control apparatus for an electric vehicle according to any one of the first to fourth aspects, the remaining capacity of the auxiliary battery is reduced from the second threshold value due to the discharge of the auxiliary battery. Deterioration information of the auxiliary battery is stored when changing to the first threshold value.

  The invention according to claim 6 is the electric vehicle control device according to claim 3 or 4, wherein the remaining capacity of the main battery is not more than a third threshold value and the remaining capacity of the auxiliary battery is not more than the first value. Or when it is determined that the destination cannot be reached using both the main battery and the auxiliary battery, the communication device sends the rescue request information to the user according to the user's command. It is characterized by being sent to the general center.

  The invention according to claim 7 is the electric vehicle control device according to claim 6, wherein after the communication device transmits the rescue request information to a general center, the communication device is a vehicle of a user who has the intention to rescue. The information is received from the general center.

  The invention according to claim 8 is the electric vehicle control device according to claim 6 or 7, wherein after the communication device transmits the rescue request information to the general center, the battery control unit is configured to store the auxiliary battery. When the remaining capacity exceeds the first threshold, the buck-boost is driven to charge the auxiliary battery from the auxiliary battery until the remaining capacity of the auxiliary battery reaches the first threshold.

  The invention according to claim 9 is the electric vehicle control device according to any one of claims 6 to 8, wherein the state storage unit is configured integrally with the auxiliary battery, and the remaining capacity and deterioration of the auxiliary battery. Information and authentication information are stored, and after the communication device transmits the rescue request information to a general center, after the auxiliary battery of the vehicle of the user having the rescue intention is mounted, the communication device is It is transmitted to the said control center that authentication of the identification information of the auxiliary battery of the vehicle of the user who has a rescue intention was completed.

  The invention according to claim 10 is the electric vehicle control device according to claim 6 or 7, wherein after the communication device transmits the rescue request information to a general center, the vehicle of the user having the rescue intention After the auxiliary battery is mounted, the battery control unit drives the buck-boost until the remaining capacity of the auxiliary battery of the user's vehicle rescued reaches the first value. The main battery is charged from the auxiliary battery, and the communication device transmits the discharge amount integrated value of the auxiliary battery of the rescued user's vehicle to the general center.

  According to an eleventh aspect of the present invention, there is provided a control device for an electric vehicle according to any one of the seventh to tenth aspects, wherein the display device displays information received from the communication device (for example, a display device in an embodiment described later). 33), and the communication device displays information synchronized with information to be displayed on the display device on the portable device after transmitting the rescue request information to a general center.

  An invention according to claim 12 is an electric vehicle comprising the control device for an electric vehicle according to any one of claims 1 to 11.

  According to the first and twelfth aspects of the present invention, since information on vehicles that can rescue other vehicles is automatically collected in the central center, the replacement of the auxiliary battery with the other vehicles can be promoted.

  According to the invention of claim 2, when a vehicle that can rescue another vehicle receives the relief request information, the presence or absence of the user's intention to rescue is confirmed, so the burden on the rescuer side is not excessive, The replacement of the auxiliary battery with another vehicle can be facilitated.

  According to the invention of claim 3, since it is ensured that the destination can be reached even when another vehicle is rescued, the burden on the rescuer is not excessive, The replacement of the auxiliary battery can be facilitated.

  According to the fourth aspect of the present invention, the location information of the user having a rescue intention can be notified to the rescue requester side, so that the relief requester can be given a sense of security and safety can be improved.

  According to the invention of claim 5, the deterioration information of the auxiliary battery can be properly stored.

  According to the sixth aspect of the present invention, since the information on the vehicle requesting the rescue is collected at the general center, the replacement of the auxiliary battery with another vehicle can be promoted.

  According to the seventh aspect of the present invention, since the information on the vehicle having the intention to rescue can be provided to the rescue requesting vehicle, it is possible to give the relief requester a sense of security and improve safety.

  According to the eighth aspect of the present invention, since the main battery is charged as much as possible before the auxiliary battery of the vehicle having the intention to rescue is provided, the cruising distance can be increased.

  According to the invention of claim 9, since it can authenticate that the auxiliary battery mounted by exchange is an auxiliary battery of a user who has a relief intention, it is possible to give relief to the relief requester and The user who has can be evaluated appropriately.

  According to invention of Claim 10, since the discharge amount integrated value of the auxiliary battery provided from the user who has a relief intention can be transmitted to a general center, the auxiliary battery provided from the user who has a relief intention is appropriately used. Can be evaluated.

  According to the invention of claim 11, when the display device cannot display information because the power cannot be supplied by the main battery and the auxiliary battery of the vehicle requesting the rescue, or the power consumption is not progressed. Even when the device is not operated, information received by the communication device can be displayed by the portable device regardless of inside or outside of the vehicle.

It is a mimetic diagram showing the composition of the control device of the electric vehicle concerning one embodiment of the present invention. It is a schematic diagram which shows the structure of the low voltage | pressure 1 sub battery which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the control apparatus of the electric vehicle which concerns on one Embodiment of this invention. It is a flowchart which shows operation | movement of the control apparatus of a rescue possible vehicle. It is a figure which shows the example of a display of the display apparatus of a vehicle which can be relieved. It is a flowchart which shows operation | movement of the control apparatus of a rescue possible vehicle. It is a flowchart which shows operation | movement of a relief request vehicle. It is a figure which shows the example of a display of the display apparatus of a relief request vehicle. It is a flowchart which shows the operation | movement of charge control.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  FIG. 1 is a schematic diagram showing an internal configuration of an electric vehicle on which the control device of this embodiment is mounted. An electric vehicle 1 (hereinafter simply referred to as “vehicle”) shown in FIG. 1 includes a motor generator (hereinafter simply referred to as “motor”) 2, a power drive unit (PDU) 3, a high-voltage main battery 4, and a first DC / DC. Converter (DC / DC1) 5, low-voltage 1 sub-battery 6, second DC / DC converter (DC / DC2) 7, low-voltage 2 sub-battery 8, contactor 9, contactless charging device 15, charger 16 Vehicle system control unit ECU20.

  The motor 2 generates power (torque) by being supplied with three-phase AC power from a high-voltage power supply system (drive system circuit) via the power drive unit 3. Torque generated by the motor 2 is transmitted to a drive shaft of a drive wheel (not shown), and the vehicle travels. Further, the motor 2 generates three-phase AC power by the rotation of the drive wheels during the deceleration traveling.

  The power drive unit 3 converts DC power supplied from the high-voltage power supply system into three-phase AC power to drive the motor 2 and converts the three-phase AC power generated by the motor 2 into DC power. An air conditioner 11 is connected to the high voltage power supply system.

  The high-voltage main battery 4 is composed of a plurality of battery modules connected in series housed in a box, and supplies a high voltage of, for example, 300V. Each battery module is configured by connecting a plurality of storage batteries such as lithium ion batteries in series. The high-voltage main battery 4 is controlled so that its remaining capacity is between a predetermined lower limit value and an upper limit value. The high-voltage main battery 4 can be charged by power generation by the motor 2 and can be charged by electric power obtained from external energy via the charger 16.

  The low voltage 1 sub-battery 6 is a detachable battery constituted by a storage battery such as a lithium ion battery, and supplies a lower voltage than the high voltage main battery 4, for example, a voltage of 24V. The low-voltage 1 sub-battery 6 is connected to the high-voltage power supply system via the first DC / DC converter 5 and can be charged by reducing the high-voltage current of the high-voltage power supply system by the first DC / DC converter 5 and supplying it. . The low-voltage 1 sub-battery 6 can be charged with electric power obtained from external energy via a non-contact charging device 15 described later. The voltage and current of the low voltage 1 sub-battery 6 are monitored by the voltage / current monitoring unit 31.

  Further, as shown in FIG. 2, the low voltage 1 sub-battery 6 includes a battery body 41 and a battery storage unit 42, and the battery storage unit 42 includes a battery state storage unit 43 and a battery identification information storage unit 44. Prepare. The battery state storage unit 42 stores the remaining capacity of the low-voltage 1 sub-battery 6 based on the detection result of the low-voltage 1 sub-battery remaining capacity monitoring unit 22 described later, and the low-voltage based on the detection result of the voltage-current monitoring unit 31. An accumulated discharge amount, deterioration information, and the like of one sub-battery 6 are stored. The battery identification information storage unit 44 stores the manufacturing number of the low voltage 1 sub-battery 6 and the like.

  The low-voltage 2 sub-battery 8 is an auxiliary machine that can operate even when the vehicle system is not operating, for example, a 12V battery that supplies power to the headlight 12, the interior light 13, and the winker 14, and is connected via the second DC / DC converter 7. Are arranged in parallel with the low voltage 1 sub-battery 6. The low-voltage 2 sub-battery 8 is charged by supplying the electric power of the low-voltage 1 sub-battery 6 with the second DC / DC converter 7 stepped down.

  The contactor 9 electrically disconnects or connects the power drive unit 3 side, the first DC / DC converter 5 side, and the high-voltage main battery 4 side.

The non-contact charging device 15 charges the low-voltage 1 sub-battery 6 by receiving power by magnetic field resonance when it is opposed to a non-contact power supply device (not shown) provided outside the vehicle, for example. The non-contact charging device 15 is constituted by, for example, a coil or a rectifier, but may have any configuration.
Moreover, the structure which replaces with the non-contact charging device 15 and charges with the electric power obtained by solar energy by arrange | positioning a solar panel may be sufficient.

  The charger 16 charges the high-voltage main battery 4 by receiving power from external energy (outlet) provided outside the vehicle via a plug (not shown). The electric power from the external energy supplied from the charger 16 to the high-voltage power supply system is stepped down by the first DC / DC converter 5 and supplied to the low-voltage 1 sub-battery 6, whereby the low-voltage 1 sub-battery 6 can be charged.

  The vehicle system control unit ECU 20 has information such as an ignition switch (not shown) and operation information of the air conditioner 11, information from a vehicle speed sensor (not shown) for detecting the vehicle speed, information such as an accelerator opening degree and a brake pedal depression amount. Entered. Based on these pieces of information, the vehicle system control unit ECU 20 derives a required output of the vehicle and controls the power drive unit 3 and the motor 2. In addition, the vehicle system control unit ECU 20 controls the first DC / DC converter 5 and the second DC / DC converter 7 and controls the charger 16 by performing plug detection and the like, and controls charging / discharging of the high-voltage main battery 4. To do.

  The high voltage main battery remaining capacity monitoring unit 21 detects the remaining capacity of the high voltage main battery 4, and the low voltage 1 sub battery remaining capacity monitoring unit 22 detects the remaining capacity of the low voltage 1 sub battery 6. The low voltage 2 sub-battery monitoring unit 23 monitors the load status connected to the low voltage 2 sub battery 8. Based on these pieces of information, the low-voltage 1 sub-battery charge / discharge control unit 24 controls charging / discharging of the low-voltage 1 sub-battery 6. Further, the non-contact charging device control unit 25 controls the non-contact charging device 15 by performing detection and power reception authentication of a non-contact power feeding device (not shown).

  The vehicle system control unit ECU 20 is connected to a communication device 32 that can communicate with an unillustrated general center, a display device 33 that displays information obtained from the communication device 32 and the navigation system 34, and a navigation system 34. Yes.

  As described above, the electric vehicle 1 according to the present embodiment includes three batteries: the high voltage main battery 4, the low voltage 1 sub battery 6, and the low voltage 2 sub battery 8.

  Since the low-voltage 1 sub-battery 6 is connected to the high-voltage power supply system via the first DC / DC converter 5, the high-voltage power of the high-voltage main battery 4 can be charged by being stepped down by the first DC / DC converter 5 and supplied. is there. As described above, the low-voltage 1 sub-battery 6 can be charged with electric power obtained from external energy via the non-contact charging device 15, and when the non-contact charging device 15 is not operable, the charger The high voltage power from the external energy supplied from 16 can be charged by being stepped down by the first DC / DC converter 5 and supplied. Further, the high-voltage main battery 4 can be charged by boosting and supplying the power of the low-voltage 1 sub-battery 6 by the first DC / DC converter 5.

  As described above, in the present embodiment, among the electric devices mounted on the vehicle 1, auxiliary equipment that can operate even when the vehicle system is not in operation, that is, the headlight 12, the indoor lamp 13, the blinker 14, etc. Electric power is supplied from the low voltage 2 sub-battery 8. On the other hand, electrical devices for starting the vehicle system and starting the non-contact charging device 15 and the charger 16, that is, the vehicle system control unit ECU 20, the low-voltage 1 sub-battery remaining capacity monitoring unit 22, the low-voltage 2 sub-battery monitoring unit 23, the low-voltage Power is supplied from the low voltage 1 sub battery 6 to the 1 sub battery charge / discharge control unit 24, the non-contact charging device control unit 25, and the like. Therefore, if the power of the low-voltage 1 sub-battery 6 is reduced too much, not only the vehicle system can be started, but also the high-voltage main battery 4 and the low-voltage 1 sub-battery 6 cannot be charged.

  For this reason, in this embodiment, the remaining capacity of the low-voltage 1 sub-battery 6 is the first so that the low-voltage 1 sub-battery 6 surely has electric power for operating the vehicle system controller ECU 20 and the non-contact charging device controller 25. It is controlled not to fall below the threshold value. Until the remaining capacity of the low-voltage 1 sub-battery 6 decreases to the first threshold value, control is performed so that the electric power of the low-voltage 1 sub-battery 6 is preferentially supplied to the motor 2 (normal mode). Since the discharge is suppressed, it is possible to prevent the high-voltage main battery 4 from deteriorating.

  In the present embodiment, the target value of the remaining capacity of the low-voltage 1 sub-battery 6 can be controlled as a second threshold value that is higher than the first threshold value (reserve mode). These modes can be switched by a user instruction. This second threshold is a value close to the maximum amount that can be charged to the low-voltage 1 sub-battery 6, and even when the remaining capacity of the high-voltage main battery 4 drops below the lower limit value and the high-voltage main battery 4 cannot travel, it is to some extent. It is possible to supply enough power to continue running.

  Here, since the low-voltage 1 sub-battery 6 is detachable as described above, it can be easily replaced with another low-voltage sub-battery. Therefore, even when the remaining capacity of the low-voltage 1 sub-battery 6 mounted on the vehicle 1 is reduced, the vehicle 1 can continue running by replacing it with another charged low-voltage 1 sub-battery. .

  The charged low-voltage 1 sub-battery can be obtained at a dealer or a battery station. However, in the present embodiment, by using the communication device 32 and the navigation system 34, it can be obtained from other vehicles traveling around the vehicle. It is possible to obtain a low voltage 1 sub-battery having a remaining capacity equal to or greater than a predetermined value. Specifically, the communication device 32 mounted on the vehicle 1 transmits various information on the running vehicle to a general center (not shown), and receives information on other vehicles and battery stations from the general center. . For example, the remaining capacities of the high-voltage main battery 4 and the low-voltage 1 sub-battery 6 both fall below a predetermined value, or the destination can be reached even based on the remaining capacities of the high-voltage main battery 4 and the low-voltage 1 sub-battery 6. The incapable vehicle 1 transmits relief request information for requesting relief by replacement of the low voltage 1 sub-battery via the communication device 32. Hereinafter, the vehicle 1 that has transmitted the rescue request information for requesting rescue by replacing the low-voltage 1 sub-battery is referred to as a rescue request vehicle.

  On the other hand, for the vehicle 1 in which the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or greater than a predetermined value, information on the rescue request vehicle that is traveling in the vicinity and the battery in which the number of low-voltage 1 sub-battery stocks has decreased to a certain level or more. Information of the station (relief request battery station. Hereinafter, the rescue request vehicle and the rescue request battery station are also referred to as a rescue requester) is provided by the general center via the communication device 32. When the user of the vehicle 1 decides to rescue the rescue requester, the navigation system 34 of the vehicle 1 starts guidance to the rescue point, while the rescue requester is provided with information on the vehicle 1. When the user of the vehicle 1 arrives at the rescue point and exchanges the low voltage 1 sub-battery 6 with the rescue request vehicle, the rescue request vehicle is supplied from the low voltage 1 sub battery 6 whose remaining capacity is equal to or greater than a predetermined value. It can be driven by electric power.

  Hereinafter, operation | movement of the control apparatus of the electric vehicle 1 which concerns on this embodiment is demonstrated with reference to FIGS. FIG. 3 is a flowchart showing the operation of the control device of the electric vehicle 1 according to the present embodiment. First, the high voltage main battery remaining capacity monitoring unit 21 detects the remaining capacity of the high voltage main battery 4 (step S1), and the low voltage 1 sub battery remaining capacity monitoring unit 22 detects the remaining capacity of the low voltage 1 sub battery 6 ( Step S2). Then, the vehicle system control unit ECU 20 determines whether or not the vehicle system is operating, that is, whether or not the ignition switch is turned on (step S3). If it is determined in step S1 that the ignition switch is ON, that is, if the vehicle system is operating, the vehicle system control unit ECU 20 determines whether the reserve mode is ON (step S4).

  If it is determined in step S4 that the reserve mode is ON, the target value of the remaining capacity of the low-voltage 1 sub-battery 6 is set high according to the user's instruction. It is controlled to maintain a high capacity state. In such a case, in order to determine whether the rescue requester who requests the low voltage 1 battery can be rescued using the low voltage 1 battery 6 mounted on the vehicle 1 as the rescueable vehicle. Then, the process proceeds to process A shown in FIG.

  As shown in FIG. 4, in the process A, the low voltage 1 sub-battery remaining capacity monitoring unit 22 determines whether or not the remaining capacity of the low voltage 1 sub battery 6 is smaller than the second threshold value (step S21). When it is determined that the remaining capacity of the low-voltage 1 sub-battery 6 is smaller than the second threshold, the remaining capacity of the low-voltage 1 sub-battery 6 is not high enough to rescue the rescue requester. Then, the low-voltage 1 sub-battery 6 is set as one that is not ready for rescue (READY OFF) (step S22). Thereafter, the communication device 32 communicates with the general center, and transmits to the central center that the rescue preparation of the low voltage 1 sub-battery 6 mounted on the vehicle 1 is incomplete together with the vehicle information, battery information, and position information. (Step S23).

  Next, the low-voltage 1 sub-battery charge / discharge control unit 24 turns on the first DC / DC converter 5 to switch to a state where the voltage can be lowered (step S24), and starts charging the low-voltage 1 sub-battery 6 by the high-voltage main battery 4 ( Step S25). During charging of the low-voltage 1 sub-battery 6 by the high-voltage main battery 4, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 detects the remaining capacity of the low-voltage 1 sub-battery 6 (step S26), and the remaining capacity of the low-voltage 1 sub-battery 6 ≧ It is determined whether or not the threshold value is 2 (step S27). While it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≧ the second threshold value, that is, when the remaining capacity of the low-voltage 1 sub-battery 6 <the second threshold value, charging is continued. When it is determined in step S27 that the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or greater than the second threshold, the low-voltage 1 sub-battery charge / discharge control unit 24 ends the charging of the low-voltage 1 sub-battery 6 (step S28). The first DC / DC converter 5 is turned off (step S29).

  If it is determined that the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or greater than the second threshold value, the remaining capacity of the low-voltage 1 sub-battery 6 is high, and thus the vehicle system control unit ECU 20 has completed the rescue preparation for the low-voltage 1 sub-battery 6 It is set as a thing (READY ON) (step S30). Thereafter, the communication device 32 communicates with the general center, and transmits to the general center together with vehicle information, battery information, and position information that the rescue preparation for the low voltage 1 sub-battery 6 mounted on the vehicle 1 has been completed. Information is received from the center (step S31). Information received by the communication device 32 is displayed by the display device 33 (step S32).

  FIG. 5 shows a display example of the display device 33 in step S32. In step S31, when the information of the surrounding relief request vehicle and the relief request battery station is received from the general center, the display device 33 displays the position information of the plurality of relief requesters on the map. If it is difficult to replace the low-voltage 1 sub-battery at the current location of the rescue request vehicle, the general center will designate another safe place and replace the low-voltage 1 battery at that location. Instructed. Hereinafter, the place where the low-voltage 1 sub-battery is replaced is called a rescue point.

  Next, the vehicle system control unit ECU 20 determines whether or not there is rescue request information in the information received from the general center (step S33). If it is not determined that there is rescue request information, the vehicle system control unit ECU 20 switches the communication device 32 to the reception standby state (step S34), and starts a timer so as to continue the reception standby state for a predetermined time (step S35). ). If it is determined that the predetermined time has elapsed (step S36), the process is terminated.

  If it is determined in step S33 that there is rescue request information, the process proceeds to process A ′ shown in FIG. First, the navigation system 34 determines whether or not a destination is set by the user (step S37). If it is not determined that there is a destination setting, that is, if the destination is not set by the user, the navigation system 34 displays a destination input screen on the display device 33 (step S38) and prompts the user. Prompt for destination. When the user inputs a destination (step S39), the navigation system 34 next determines whether or not the rescue requester can be rescued (step S40).

  Whether or not the rescue is possible is based on the current position information of the vehicle 1, the remaining capacity of the high-voltage main battery 4 and the low-voltage 1 sub-battery 6, the position information of the destination set by the user, and the position information of the rescue point. If it is determined that it is determined that the vehicle 1 can reach the destination even if the vehicle 1 passes through the rescue point, it is determined that the rescue is possible. If it is determined in step S41 that the rescue is possible, the navigation system 34 calculates the required time for the rescue, that is, the required time to go to the rescue point, and displays the calculated time on the display device 33 (step S42). Based on this display, the user determines whether or not to rescue. The vehicle system control unit ECU 20 determines whether or not the user has a rescue intention based on the user's operation (step S43).

  If it is determined in step S40 that the rescue is impossible, or if it is determined in step S43 that the user does not intend to rescue, the fact that no rescue is performed is transmitted to the general center (step S46), and the process ends. To do.

  If it is determined in step S43 that the user has a rescue intention, the vehicle system control unit ECU 20 has an intention to disclose the current position information of the vehicle 1 to the rescue requester based on the user's operation. It is determined whether or not (step S45). If it is determined that there is an intention to disclose, the navigation system 34 performs a process of disclosing the position information of the own vehicle to the rescue requester (step S46).

  Regardless of the intention to disclose, the navigation system 34 next starts route guidance to the rescue point (step S47). The position information of the vehicle 1 is transmitted to the general center at predetermined time intervals (step S48). The navigation system 34 determines whether or not the rescue point has been reached (step S49), and if it is determined that the rescue point has been reached, the process ends.

  Returning to FIG. 3, if it is not determined in step S4 that the reserve mode is ON, the target value of the remaining capacity of the low-voltage 1 sub-battery 6 is set low, so that the communication device 32 determines that the vehicle 1 Transmits to the general center that the rescue requester is not a vehicle capable of rescue (step S5). Next, the high voltage main battery remaining capacity monitoring unit 21 determines whether or not the remaining capacity of the high voltage main battery 4 ≦ the third threshold value (step S6). When it is determined that the remaining capacity of the high-voltage main battery 4 ≦ the third threshold value, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 determines whether the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value. (Step S7). If it is determined in step S7 that the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value, that is, the remaining capacity of the high-voltage main battery 4 ≦ the third threshold value and the remaining capacity of the low-voltage 1 sub-battery 6 ≦ first threshold value In this case, the remaining capacities of the high-voltage main battery 4 and the low-voltage 1 sub-battery 6 can be said to be low, so that it is determined whether or not another charged low-voltage 1 sub-battery is requested. The process proceeds to process B shown in FIG.

  If it is not determined in step S6 that the remaining capacity of the high-voltage main battery 4 is equal to or less than the third threshold, that is, if the remaining capacity of the high-voltage main battery 4 is greater than the third threshold, or if the remaining capacity of the low-voltage 1 sub-battery 6 is determined in step S7. If it is not determined that the capacity ≦ the first threshold value, that is, if the remaining capacity of the low-voltage 1 sub-battery 6 is greater than the first threshold value, the navigation system 34 determines whether or not the destination is set by the user ( Step S8). When it is determined that the destination is set, the navigation system 34, based on the position information of the destination set by the user and the remaining capacity of the current high-voltage main battery 4 and low-voltage 1 sub-battery 6, It is determined whether or not the vehicle 1 can reach the destination (step S9). If it is determined that the destination can be reached, the process ends.

  If it is not determined that the destination is set in step S8, that is, if the destination is not set, or if it is not determined that the destination can be reached in step S9, that is, the destination is reached. If it is not reachable, the process proceeds to process B shown in FIG. 7 in order to determine whether to request another charged low voltage 1 sub-battery.

  As shown in FIG. 7, in the process B, first, the display device 33 displays a screen that prompts the user to input a rescue request (step S61). Next, the vehicle system control unit ECU 20 determines whether a rescue request has been input (step S62). If it is not determined that a rescue request has been input, the process ends.

  If it is determined in step S62 that the rescue request has been input, the communication device 32 communicates with the general center (step S63), and the rescue request information including the current position information, vehicle information, and battery information of the vehicle 1 is obtained. Send to the general center. Then, when the communication device 32 is disclosed by the user who has the intention to rescue, the position information of the vehicle in which the reserve mode that is traveling around is ON, the vehicle information and battery identification information of the user who has the rescue intention, The position information of the vehicle of the user who has a will of help and the position information of the rescue point are received. Next, the display information of the portable device such as a mobile phone is synchronized with the display information of the display device 33 (step S64), and the display device 33 and the portable device display the information received from the general center. (Step S65). As a result, when the remaining capacity of the low-voltage 1 sub-battery 6 and the high-voltage main battery 4 is later reduced and display by the display device 33 becomes difficult, or when the display device 33 is turned off so as not to advance power consumption. Even if it exists, it becomes possible to display the information received by the communication apparatus 32, and the information of the navigation system 34 with a portable apparatus regardless of the inside and outside of a vehicle.

  FIG. 8 shows a display example of the display device 33 in step S65. In step S63, when the position information of the vehicles that are traveling around and whose reserve mode is ON is received from the general center, the display device 33 displays the position information of these vehicles on the map. In addition, since the vehicle with the reserve mode ON displayed here is controlled so that the remaining capacity of the low voltage 1 sub-battery 6 is maintained high, the vehicle that can rescue the rescue requester (rescue is possible) Vehicle).

  Next, the low voltage 1 sub-battery remaining capacity monitoring unit 22 determines whether or not the remaining capacity of the low voltage 1 sub battery 6 is greater than the first threshold value (step S66). If it is determined that the remaining capacity of the low-voltage 1 sub-battery> the first threshold value, it is still possible to supply a small amount of power from the low-voltage 1 sub-battery 6. 24, the first DC / DC converter 5 is turned on to switch to a boostable state (step S67), and charging of the high voltage main battery 4 by the low voltage 1 sub-battery 6 is started (step S68). During charging of the high-voltage main battery 4 by the low-voltage 1 sub-battery 6, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 detects the remaining capacity of the low-voltage 1 sub-battery 6 (step S69), and the remaining capacity of the low-voltage 1 sub-battery 6 ≦ the first It is determined whether the threshold value is 1 (step S70). While it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value, that is, when the remaining capacity of the low-voltage 1 sub-battery 6> the first threshold value, charging is continued. If it is determined in step S70 that the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or less than the first threshold, the low-voltage 1 sub-battery charge / discharge control unit 24 finishes charging the high-voltage main battery 4 with the low-voltage 1 sub-battery 6. (Step S71), the first DC / DC converter 5 is turned off (Step S72).

  As a result of the above processing, the remaining capacity of the low-voltage 1 sub-battery 6 has decreased to the first threshold value. Therefore, if the vehicle 1 has reached the rescue point, it is preferable to stop the vehicle system. After the vehicle system is stopped and determined to be IG-OFF (step S73), the low-voltage 1 sub-battery charge / discharge control unit 24 locks the low-voltage 1 sub-battery 6 to prepare for replacement of the low-voltage 1 sub-battery 6. Is turned off (step S74), and the low voltage 1 sub-battery 6 is maintained in a removable state.

  After the vehicle of the user having the intention to rescue reaches the rescue point, the low-voltage 1 sub-battery mounted on the vehicle of the user having the intention to rescue is replaced with the low-voltage 1 sub-battery 6 mounted on the vehicle 1. (Step S75), the low-voltage 1 sub-battery mounted on the vehicle of the user who has the intention to rescue is newly mounted on the vehicle 1. The vehicle system control unit ECU 20 collates the battery identification information stored in the battery identification information storage unit 44 of the newly installed low voltage 1 sub-battery 6 with the information received from the general center in step S63 (step S76). Authentication is performed (step S77). If it is not authenticated, it is displayed that the battery is not replaceable or the battery of the user's vehicle that is willing to help (step S78), and the fact is transmitted to the general center (step S79), and the process ends. .

  When the authentication is completed in step S77, the display device 33 displays that the replacement is completed (step S80). Since it is necessary to operate the vehicle system of the vehicle 1 in order to be able to resume running after completion of the exchange, the vehicle system control unit ECU 20 determines whether or not the vehicle 1 is IG-ON (step S81). ), If it is determined that the IG-ON is ON, the fact that the replacement and authentication of the low-voltage 1 sub-battery has been completed is transmitted to the general center (step S82). As a result, the rescue operation ends, and the vehicle of the user who has the intention to rescue may leave the rescue point.

  Next, the low-voltage 1 sub-battery charge / discharge control unit 24 turns on the lock of the low-voltage 1 sub-battery 6 (step S83), and makes the low-voltage 1 sub-battery 6 unremovable. Next, the low-voltage 1 sub-battery charge / discharge control unit 24 turns on the first DC / DC converter 5 to switch to a state where the voltage can be boosted (step S84), and starts charging the high-voltage main battery 4 with the low-voltage 1 sub-battery 6 ( Step S85). At the time of charging, the voltage / current monitoring unit 31 measures the voltage and current of the low voltage 1 sub-battery 6 (step S86). While the high-voltage main battery 4 is being charged by the low-voltage 1 sub-battery 6, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 detects the remaining capacity of the low-voltage 1 sub-battery 6 (step S87), It is determined whether the threshold value is 1 (step S88). While it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value, that is, when the remaining capacity of the low-voltage 1 sub-battery 6> the first threshold value, charging is continued. If it is determined in step S88 that the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value, the low-voltage 1 sub-battery charge / discharge control unit 24 finishes charging the high-voltage main battery 4 with the low-voltage 1 sub-battery 6. (Step S89), the first DC / DC converter 5 is turned OFF (Step S90).

  Thereafter, the integration of the discharge amount of the low-voltage 1 sub-battery 6 is terminated, and the result is stored in the battery state storage unit 43 (step S91). The integration result of the discharge amount of the low voltage 1 sub-battery 6 is transmitted to the general center (step S92). As a result, the general center can appropriately evaluate the power information actually obtained by the low-voltage 1 sub-battery of the user who has a rescue intention, the performance information of the low-voltage 1 sub-battery of the user who has the rescue intention, and the like. Based on these information, it is also possible to give a privilege to the user who performed relief.

  In this manner, the vehicle provided with the low voltage 1 sub-battery charged from the other vehicle can travel again. At this time, it is desirable that the air conditioner 11 is disabled and the maximum vehicle speed and the maximum acceleration are regulated to increase the distribution of regenerative brakes so that the vehicle can travel as long as possible. Emergency driving mode).

  Returning to FIG. 3, when it is determined in step S3 that the ignition switch is OFF, that is, when the vehicle system is not operating, the low voltage 1 sub-battery 6 is subjected to non-contact charging. The process proceeds to process C. As shown in FIG. 9, in process C, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 determines whether or not the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or greater than the second threshold (step S101). If it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≧ the second threshold value, that is, if the remaining capacity of the low-voltage 1 sub-battery 6 is less than the second threshold value, the non-contact charging device control unit 25 It is determined whether or not the charging device 15 is in a power receivable state (step S102). If it is determined that non-contact power reception is possible, the low-voltage 1 sub-battery charge / discharge control unit 24 locks the low-voltage 1 sub-battery 6 (step S103) and makes the low-voltage 1 sub-battery 6 unremovable. Next, the low-voltage 1 sub-battery charge / discharge control unit 24 starts charging the low-voltage 1 sub-battery 6 by the non-contact charging device 15 (step S104). During charging of the low-voltage 1 sub-battery 6 by the non-contact charging device 15, the low-voltage 1 sub-battery remaining capacity monitoring unit 22 detects the remaining capacity of the low-voltage 1 sub-battery 6 (step S 105), and the remaining capacity of the low-voltage 1 sub-battery 6 ≧ It is determined whether it is the second threshold value (step S106). If it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≧ the second threshold value, that is, if the remaining capacity of the low-voltage 1 sub-battery 6 <the second threshold value, charging is continued. If it is determined in step S106 that the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or greater than the second threshold, the low-voltage 1 sub-battery charge / discharge control unit 24 charges the low-voltage 1 sub-battery 6 by the non-contact charging device 15. The process ends (step S107).

  If it is determined in step S102 that non-contact power reception is not possible, for example, if the non-contact charging device 15 is not sufficiently close to the non-contact power feeding device, or if the low-voltage 1 sub-battery 6 by the non-contact charging device 15 is determined in step S107. After the end of charging, the vehicle system control unit ECU 20 determines whether or not the high-voltage main battery remaining capacity + the low-voltage 1 sub-battery remaining capacity <the fourth threshold value (step S108). When it is determined that the remaining capacity of the high-voltage main battery 4 + the remaining capacity of the low-voltage 1 sub-battery 6 <the fourth threshold value, the vehicle system control unit ECU 20 turns on the contactor 9 (step S109). Then, the low-voltage 1 sub-battery charge / discharge control unit 24 turns on the first DC / DC converter 5 and switches the first DC / DC converter 5 to a state in which the first DC / DC converter 5 can be boosted (step S111). Charging of the high voltage main battery 4 by the low voltage 1 sub-battery 6 is started (step S111). Further, the voltage / current monitoring unit 31 starts calculating the discharge amount of the low-voltage 1 sub-battery (step S112). During charging of the high voltage main battery 4 from the low voltage 1 sub battery 6, the low voltage 1 sub battery remaining capacity monitoring unit 22 detects the remaining capacity of the low voltage 1 sub battery 6 (step S 113), and the remaining capacity of the low voltage 1 sub battery 6 ≦ the first It is determined whether or not 1 is a predetermined value (step S114). When it is not determined that the remaining capacity of the low-voltage 1 sub-battery ≦ the first threshold value, that is, when the remaining capacity of the low-voltage 1 sub-battery 6 is greater than the first threshold value, the charging of the high-voltage main battery 4 from the low-voltage 1 sub-battery 6 Continue.

  If it is determined in step S114 that the remaining capacity of the low-voltage 1 sub-battery 6 is equal to or less than the first threshold, the calculation of the discharge amount of the low-voltage 1 sub-battery 6 by the voltage / current monitoring unit 31 is terminated (step S115). The data is stored in the battery state storage unit 43 of the one sub-battery 6 (step S116). Thus, by storing the discharge amount of the low-voltage 1 sub-battery 6 at every discharge opportunity such that the remaining capacity of the low-voltage 1 sub-battery 6 changes from the second threshold value to the first threshold value, the low-voltage 1 sub-battery 6 It is possible to properly record the deterioration state of.

  Then, the low-voltage 1 sub-battery charge / discharge control unit 24 finishes charging the high-voltage main battery 4 with the low-voltage 1 sub-battery 6 (step S117), and turns off the boost of the first DC / DC converter 5 (step 118). Then, the vehicle system control unit ECU 20 turns off the contactor 9 (step S119), and the low-voltage 1 sub-battery charge / discharge control unit 24 turns off the lock of the low-voltage 1 sub-battery 6 (step S120), and the process ends. . If it is not determined in step S108 that the remaining high voltage of the main battery + the remaining capacity of the low voltage 1 sub-battery <the fourth threshold value, that is, the remaining capacity of the high voltage main battery 4 + the remaining capacity of the low voltage 1 sub battery 6 ≧ In the case of the fourth threshold value, if the high-voltage main battery 4 is charged by the low-voltage 1 sub-battery 6, the high-voltage main battery 4 may be overcharged. 1 The sub-battery lock is turned off to make it removable, and the process ends.

  As described above, according to the control apparatus for an electric vehicle according to the present embodiment, information on vehicles that can rescue other vehicles is automatically collected to the general center, and information on vehicles that are requesting relief is provided. Are collected at the general center, so that the replacement of the low voltage 1 sub-battery with another vehicle can be promoted. When a vehicle capable of helping another vehicle receives the relief request information, the presence or absence of the user's intention to rescue is confirmed, and it is guaranteed that the destination can be reached even if another vehicle is rescued. Therefore, the burden on the rescuer is not excessive, and the replacement of the low voltage 1 sub-battery with another vehicle can be promoted. Since the information of the vehicle requesting the rescue is collected at the general center, the replacement of the low voltage 1 sub-battery with another vehicle can be promoted. Since the information on the vehicle having the intention to rescue can be provided to the rescue requesting vehicle, it is possible to give the relief requester a sense of security and improve safety. Since the high-voltage main battery 4 is charged as much as possible before the low-voltage 1 sub-battery of the vehicle having a rescue intention is provided, the cruising distance can be increased. Moreover, since it can authenticate that the low voltage | pressure 1 sub-battery 6 mounted | worn by replacement | exchange is the low voltage | pressure 1 sub battery of the user who has a relief intention, while being able to give relief to a relief requester, the user who has a relief intention Can be properly evaluated. In addition, the deterioration information of the low-voltage 1 sub-battery 6 can be properly stored, and the discharge amount integrated value of the low-voltage 1 sub-battery provided by the user who has the intention to rescue can be transmitted to the general center. The low voltage 1 sub-battery provided by the user who has an intention can be appropriately evaluated.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, the low-voltage 1 sub-battery 6 may be charged alone or indoors, and may be a battery that can be charged by a solar panel as described above. Moreover, the user who rescues a rescue requester includes not only a general user but also a service staff for the purpose of rescue.

1 Electric car (vehicle)
2 Motor (MG)
4 High-voltage main battery 5 First DC / DC converter (DC / DC1)
6 Low voltage 1 sub battery 7 Second DC / DC converter (DC / DC2)
8 Low-voltage 2 sub-battery 15 Non-contact charging device 16 Charger 20 Vehicle system control unit ECU

Claims (12)

A main battery that supplies power to the motor via the drive system circuit;
A detachable auxiliary battery that supplies power to the electrical equipment inside the vehicle;
A step-down / step-up / step-down device that steps down the power supplied from the drive system circuit and supplies it to the auxiliary battery, and boosts the power supplied from the auxiliary battery and supplies it to the drive system circuit;
A battery control unit that monitors the remaining capacity of the main battery and the auxiliary battery and controls charge and discharge of each, and
A control device for an electric vehicle comprising a communication device capable of communicating with a general center,
The battery control unit switches a target value of the remaining capacity of the auxiliary battery between a first value and a second value larger than the first value based on a user command,
A battery storage unit for storing the state of the auxiliary battery;
The communication device transmits information on the auxiliary battery to the general center when a remaining capacity of the auxiliary battery stored in the battery storage unit is equal to or greater than the second value. Control device.   When the communication device acquires the information on the auxiliary battery to the general center and then obtains relief request information for requesting the auxiliary battery from the general center, the communication device is responsive to the user's command. The control device for an electric vehicle according to claim 1, wherein the presence / absence of rescue intention is transmitted to the general center. With a navigation system,
The rescue request information includes rescue point information regarding a rescue point for requesting the auxiliary battery,
When the communication device acquires the rescue request information from the general center, the navigation system determines whether the vehicle can reach the destination via the rescue point only by the remaining capacity of the main battery. The control apparatus for an electric vehicle according to claim 2, wherein:   The communication device determines whether or not to disclose the current location information of the user to a rescue requester who requests an auxiliary battery when the user transmits a message indicating that the user has a rescue intention to the general center. 4. The control apparatus for an electric vehicle according to claim 3, wherein the control is transmitted to the general center in response to the command.   The battery storage unit stores deterioration information of the auxiliary battery when the remaining capacity of the auxiliary battery changes from the second value to the first value due to discharge of the auxiliary battery. Item 5. The control apparatus for an electric vehicle according to any one of Items 1 to 4.   When the remaining capacity of the main battery is less than or equal to a third value and the remaining capacity of the auxiliary battery is less than or equal to the first value, or using the remaining capacity of the main battery and the remaining capacity of the auxiliary battery 5. The communication device according to claim 3, wherein when it is determined that the point cannot be reached, the communication device transmits the rescue request information to the general center according to the instruction of the user. 6. Electric vehicle control device.   The electric vehicle according to claim 6, wherein after the communication device transmits the rescue request information to a general center, the communication device receives information on a vehicle of a user who has the intention to rescue from the general center. Control device.   After the communication device transmits the rescue request information to the general center, the battery control unit drives the step-up / down converter when the remaining capacity of the auxiliary battery exceeds the first value to The electric vehicle control device according to claim 6 or 7, wherein the main battery is charged from the auxiliary battery until a remaining capacity reaches the first value. The battery storage unit is configured integrally with the auxiliary battery, and stores the remaining capacity, deterioration information, and identification information of the auxiliary battery,
After the communication device transmits the rescue request information to a general center, after the auxiliary battery of the user's vehicle having the intention to rescue is mounted, the communication device is configured to The control device for an electric vehicle according to any one of claims 6 to 8, wherein information indicating that authentication of identification information has been completed is transmitted to the general center. After the communication device transmits the rescue request information to the general center, after the auxiliary battery of the vehicle of the user having the rescue intention is mounted, the battery control unit drives the buck-boost to rescue the user Charging the main battery from the auxiliary battery of the rescued user's vehicle until the remaining capacity of the auxiliary battery of the vehicle reaches the first value,
The said communication apparatus transmits the discharge amount integrated value of the said auxiliary battery of the rescued user's vehicle to the said control center, The control apparatus of the electric vehicle of Claim 6 or 7 characterized by the above-mentioned. A display device for displaying information received from the communication device;
The said communication apparatus displays the information synchronized with the information displayed on the said display apparatus also on a portable apparatus, after transmitting the said relief request information to a control center, The any one of Claim 7 to 10 characterized by the above-mentioned. The control apparatus of the electric vehicle as described in the item.   An electric vehicle comprising the control device for an electric vehicle according to any one of claims 1 to 11.

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