JP2013028186A - Controller for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent movement of an electric vehicle when the battery of the electric vehicle is charged.SOLUTION: The high-voltage battery 11 of the electric vehicle can be charged from an external power source 19 via a cable 18. In the case that the power source of the electric vehicle is in an ON state when the cable 18 is connected, the power source of the electric vehicle is changed over automatically to an OFF state. In the case that parking processing is not performed when the cable 18 is connected, the charging work is made to wait until the parking processing is completed. In the case that the parking processing is not performed when the cable 18 is connected, a parking ECU 22 automatically performs the parking processing by electric control. The parking processing includes a process of controlling a parking lock mechanism 14 in a lock state and/or a process of actuating a brake unit 15 as a parking brake.

Description

  The present invention relates to an electric vehicle control device that controls a parking lock mechanism of an electric vehicle.

  2. Description of the Related Art Conventionally, an electric vehicle that can run with electric power supplied from a battery is known. For example, an electric vehicle that travels by driving an electric motor with battery power is known as one of electric vehicles. In addition to an electric drive system including a battery and an electric motor, a hybrid vehicle that is further provided with an internal combustion engine and can be driven by the electric drive system or the internal combustion engine is known as one of the electric vehicles.

  Patent document 1 is disclosing the electric vehicle which permits charge, when a wheel is locked by positioning a shift apparatus in a parking position.

  Patent Document 2 discloses an electric vehicle that permits charging when the shift device is positioned at the parking position and the parking brake is operating.

  Patent Document 3 discloses an electric vehicle that avoids interruption of charging by controlling an inverter so as to fix an output shaft of a motor for driving a vehicle even when a shift device is positioned at a position other than a parking position during charging. doing.

  Patent Document 4 discloses a charging device that starts charging only when a vehicle shift device is positioned at a parking position.

JP 2000-115901 A JP 2008-167618 A JP 2009-118658 A JP 2010-148247 A

  In the configuration of the prior art, the completion of the parking process for fixing the electric vehicle in the parking state is one condition for charging the electric vehicle. The parking process is completed, for example, when the parking lock mechanism fixes the rotation of the wheel by operating the shift lever to the parking position. In another example, the parking process is completed by operating the parking brake by operating the parking brake lever.

  However, in the configuration of the related art, the user of the electric vehicle needs to operate a lever or the like for parking processing. For this reason, it is necessary for the user to perform a charging operation after the parking operation, and the user may feel bothered by the preparation operation for charging. In addition, the charging cable may be connected without the movement of the electric vehicle being prevented by the parking operation not being performed. Moreover, in the prior art depending on the operation by the user, the movement of the electric vehicle may not be reliably prevented.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric vehicle control device capable of reliably preventing movement of an electric vehicle when charging the battery of the electric vehicle from an external power source. Is to provide.

  The present invention employs the following technical means to achieve the above object.

  The invention described in claim 1 is an electric vehicle including a battery (11) that can be charged from an external power source (19), and a rotating electrical machine (12) that drives a drive wheel (16) by electric power supplied from the battery. In the control apparatus for an electric vehicle for charging, a charge preparation determination means (34, 46, 47, 161) for detecting a preparatory operation for charging the battery, and a parking device (14, 15) for preventing the movement of the electric vehicle. ) And parking control means (21, 22, 35, 37, 51-55, 167, 176) for preventing the movement of the electric vehicle by the parking device when the preparatory operation is detected by the charge preparation determining means. It is characterized by.

  According to this configuration, the battery mounted on the electric vehicle can be charged from the external power source. When the preparation operation for charging the battery from the external battery to the battery is detected by the charge preparation determination unit, the parking control unit prevents the electric vehicle from moving by the parking device. As a result, when the battery is charged from the external power source, the movement of the electric vehicle can be reliably prevented.

  According to the second aspect of the present invention, after the preparation operation is detected by the charge preparation determination unit, the charging prohibition unit (prohibit charging the battery from the external power source until the parking control unit prevents the movement of the electric vehicle). 36, 48, 165) and charging permission means (36, 56, 164) for permitting charging of the battery from the external power source when the movement of the electric vehicle is prevented by the parking control means. To do. According to this configuration, charging of the battery from the external power source is prohibited until the movement prevention of the electric vehicle by the parking control means is established, and charging is permitted when the movement prevention is established.

  According to the third aspect of the present invention, the power control means (33, 50) further prevents movement of the electric vehicle by the rotating electrical machine by deactivating the electric vehicle when the preparation operation is detected by the charge preparation determining means. 162, 166). According to this configuration, in addition to the prevention of the movement of the electric vehicle by the parking device, the movement of the electric vehicle by the rotating electrical machine is inhibited by the power control means.

  According to a fourth aspect of the present invention, the charge prohibiting means (36, 48, 165) is configured such that after the preparatory operation is detected by the charge preparation determining means, the parking control means prevents movement of the electric vehicle and the power control means. Charging of the battery from the external power supply is prohibited until the movement of the electric vehicle is blocked by the charging means (36, 56, 164), the parking control means prevents the movement of the electric vehicle, and the power control means When the movement of the electric vehicle is prevented by the above, charging from the external power source to the battery is permitted. According to this configuration, charging of the battery from the external power source is prohibited until both the prevention of movement of the electric vehicle by the parking control means and the prevention of movement of the electric vehicle by the power control means are established. Charging is permitted once the is established.

  In the invention according to claim 5, the charging prohibiting means transmits a signal for stopping power supply from the external power supply to the battery to the external power supply, and the charging permission means is a signal for starting power supply from the external power supply to the battery. Is transmitted to an external power source. According to this configuration, power supply from the external power supply is stopped. As a result, not only charging of the battery is stopped, but also power supply to the cable laid between the external power source and the electric vehicle is stopped.

  According to the sixth aspect of the present invention, there is provided an operating device (23) for instructing release of movement prevention of the electric vehicle by the parking device (14, 15), and movement of the electric vehicle by the parking device in response to the operating device. When the parking device prevents the movement of the electric vehicle by the operation control means (38, 173, 177-180) for releasing the prevention and the parking control means, the release of the movement prevention of the electric vehicle by the operation control means is invalidated. And priority processing means (39, 174) for continuing the movement prevention. According to this structure, the user can instruct | release cancellation | release of movement prevention of an electric vehicle by operating an operating device. However, when the parking apparatus prevents the movement of the electric vehicle by detecting the preparatory operation for charging, the release by the user is invalidated and the movement prevention of the electric vehicle is continued. As a result, release due to an erroneous operation of the operating device is avoided.

  The invention described in claim 7 is characterized in that the preparatory operation detected by the charge preparation determining means is a connection operation of connecting an external power source and a battery by a cable. According to this configuration, when the connection operation for connecting the external power source and the battery with the cable is detected, the parking control means prevents the electric vehicle from moving by the parking device.

  According to an eighth aspect of the present invention, there is provided a parking lock in which the parking device prevents the movement of the electric vehicle by restricting the rotation of the rotating shaft in the power transmission mechanism (13) provided between the rotating electric machine and the drive wheels. It is a mechanism (14). According to this configuration, the electric vehicle is prevented from moving by the parking lock mechanism.

  The invention according to claim 9 is characterized in that the parking device is a brake device (15) for preventing the movement of the electric vehicle by braking the rotation of the drive wheels. According to this configuration, the movement of the electric vehicle is prevented by operating the brake device as a parking brake.

  According to a tenth aspect of the present invention, the charging preparation determining means is provided in the power system electronic control device (21) for controlling the rotating electrical machine, and the parking control means is provided in the parking electronic control device (22) for controlling the parking device. A parking request means for transmitting a parking request signal for requesting the parking control means to block the movement of the electric vehicle by the parking device when a preparation operation is detected by the charge preparation determining means; 35). According to this configuration, the preparation operation is detected in the power system electronic control device. Further, the parking device is controlled by the parking electronic control device. When the preparation operation is detected, the parking request means transmits a parking request signal. As a result, a parking request signal is transmitted from the power system electronic control device to the parking electronic control device.

  Note that the reference numerals in parentheses described in the claims and the above-described means indicate the correspondence with the specific means described in the embodiments described later as one aspect, and are technical terms of the present invention. It does not limit the range.

It is a block diagram which shows the drive system of the electric vehicle containing the control apparatus for electric vehicles which concerns on 1st Embodiment to which this invention is applied. It is a sequence diagram which shows operation and a process in one usage example of 1st Embodiment. It is a flowchart which shows the process of power system ECU of 1st Embodiment. It is a flowchart which shows the process of parking ECU of 1st Embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Further, in the following embodiments, a correspondence relationship may be indicated by adding reference numerals that differ only by a hundreds to the parts corresponding to the matters described in the preceding embodiment, and redundant description may be omitted. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not explicitly stated unless there is a problem with the combination. Is also possible.

(First embodiment)
FIG. 1 is a block diagram showing an electric vehicle drive system 1 including an electric vehicle control device 2 according to a first embodiment to which the present invention is applied. The drive system 1 is mounted on an electric vehicle. The electric vehicle includes a high voltage battery (HBAT) 11, a rotating electrical machine (RTEM) 12, a power transmission mechanism (PTRM) 13, a parking lock mechanism (PLKD) 14, a brake device (BRKD) 15, and drive wheels 16.

  The high voltage battery 11 is a lithium ion secondary battery. The high voltage battery 11 is a high voltage battery that supplies a voltage of several hundred volts. The rotating electrical machine 12 includes a drive circuit such as an inverter circuit. The rotating electrical machine 12 is a motor generator that can function as an electric motor or a generator. The rotating electrical machine 12 is rotated by the electric power supplied from the high voltage battery 11 and drives the drive wheels 16. The rotating electrical machine 12 can be driven from the drive wheels 16 to generate electricity and charge the high voltage battery 11.

  The power transmission mechanism 13 can switch the power transmission state between the power source including the rotating electrical machine 12 and the drive wheels 16. The power transmission mechanism 13 can provide a drive range for causing the electric vehicle to travel forward. Further, the power transmission mechanism 13 can provide a neutral range that mechanically blocks power transmission between the power source and the drive wheels in the electric vehicle. Furthermore, the power transmission mechanism 13 can provide a reverse range for causing the electric vehicle to travel backward.

  The drive system 1 includes a parking lock mechanism 14 and a brake device 15 as a parking device that prevents the electric vehicle from moving. The parking lock mechanism 14 prevents the electric vehicle from moving by restricting the rotation of the rotating shaft in the power transmission mechanism 13 provided between the rotating electrical machine 12 and the drive wheel 16. The parking lock mechanism 14 includes an electric actuator. The parking lock mechanism 14 can be switched between a parking range and a non-parking range by an actuator. In the parking range, the rotating shaft in the power transmission mechanism 13 is mechanically restrained so as not to rotate. As a result, the rotation of the drive wheels 16 is restricted and the vehicle is prevented from moving. Thereby, the parking state of the electric vehicle is stably maintained. In the non-parking range, rotation of the rotary shaft in the power transmission mechanism 13 is allowed. In the non-parking range, the drive range, neutral range, and reverse range are selected. In this specification and drawings, parking may be expressed as “P”, and non-parking may be expressed as “Non-P”.

  The brake device 15 brakes the rotation of the wheels, for example, the drive wheels 16 by frictional force so as to prevent the electric vehicle from moving. The brake device 15 can operate as a parking brake by continuously generating a braking force. The brake device 15 includes an electric actuator. The brake device 15 can be switched between an operating state as a parking brake and a non-operating state as a parking brake by an actuator.

  The drive system 1 includes a charging circuit (CHCC) 17. The drive system 1 is configured such that the high voltage battery 11 can be charged from an external power source (EXPS) 19. The charging circuit 17 is configured to be connectable to an external power source 19 installed outside the vehicle via a cable 18. The cable 18 is connected to the charging circuit 17 by an appropriate connector. The charging circuit 17 charges the high voltage battery 11 with electric power supplied from the external power source 19.

  The external power source 19 is a low-speed charger installed in a home or a high-speed charger installed in a commercial charging stand. The electric power of the external power source 19 is supplied from a commercial power source supplied from a wide-area power network or a small-scale power generation facility installed in each home or office. The external power source 19 includes a standby unit (CHWM) 31 for holding power supply for charging in response to a command from the electric vehicle after the external power source 19 and the charging circuit 17 are connected via the cable 18; And start means (CHCM) 32 for starting supply of electric power for charging in response to a command from the electric vehicle.

  The drive system 1 includes a plurality of electronic control devices (hereinafter referred to as an ECU (Electronic Control Unit)) constituting the electric vehicle control device 2. The drive system 1 includes a power system ECU (EV-ECU) 21, a parking ECU (PK-ECU) 22, and a parking operator (PKOD) 23.

  The power system ECU 21 controls an electric power source system in the electric vehicle. The power system ECU 21 controls the rotating electrical machine 12. The power system ECU 21 controls charging of the high voltage battery 11. The power system ECU 21 can also be called an electric drive control device or a plug-in control device. The power system ECU 21 controls the rotating electrical machine 12 so that the electric vehicle travels in accordance with a user operation. When the cable 18 is connected to the electric vehicle, the power system ECU 21 requests a parking ECU 22 to be described later for a parking process for preventing the vehicle from moving. The power system ECU 21 detects that the cable 18 is connected to the electric vehicle via the charging circuit 17. Power system ECU21 can transmit the signal which requests | requires a parking process to parking ECU22 mentioned later. The power system ECU 21 can receive a signal indicating completion of the parking process from the parking ECU 22. Further, the power system ECU 21 waits for charging until the parking process is completed, and starts charging when the parking process is completed. The power system ECU 21 can transmit an electric signal including a signal instructing standby for charging and a signal instructing start of charging to the external power source 19 via the charging circuit 17.

  The power system ECU 21 includes power control means (PWCM) 33 that controls the rotating electrical machine 12. The power control means 33 switches the electric vehicle between an activated state and an inactivated state by intermittently supplying power from the high voltage battery 11 to the rotating electrical machine 12. The active state can also be referred to as a state where preparation for traveling is completed. The active state is also called a ready-on state. The active state corresponds to a state in which power is supplied from the high voltage battery 11 to the rotating electrical machine 12. The inactive state can also be referred to as a state where the rotary electric machine 12 cannot travel. The inactive state is also referred to as a ready-off state. The inactive state corresponds to a state where power supply from the high voltage battery 11 to the rotating electrical machine 12 is interrupted. When a preparation operation is detected by a charge preparation determination unit 34 (to be described later), the power control unit 33 deactivates the electric vehicle and prevents the electric vehicle from moving by the rotating electrical machine 12.

  The power system ECU 21 includes a charge preparation determination unit (CHRM) 34 that detects a preparation operation for charging and determines that the preparation operation is completed. Completion of the preparatory operation for charging can be determined by connecting the cable 18 to the electric vehicle, that is, the charging circuit 17.

  The power system ECU 21 includes a parking request means (PLRM) 35 that transmits a parking request signal (P request signal) for requesting the parking ECU 22 to execute the parking process.

  The power system ECU 21 includes a charge determination unit (CHDM) 36 that switches whether charging is permitted or prohibited by determining whether a predetermined charging condition is satisfied. The charging condition can be one condition or a combination of a plurality of conditions. In this embodiment, the charging condition is that all of the following two conditions are satisfied. The first condition is completion of the charging preparation operation. Completion of this charging preparation operation is that the external power supply 19 and the charging circuit 17 are connected by the cable 18 to form a charging current supply circuit. The second condition is establishment of a parking state on the electric vehicle side. The establishment of the parking state is satisfied by the fact that the power source of the electric vehicle is inactive and / or the wheels of the electric vehicle are restrained. Therefore, the establishment of the parking state can include a condition that the electric vehicle is in a ready-off state. In addition, the establishment of the parking state may include a condition that the parking lock mechanism 14 is in a locked state and / or that the brake device 15 is operating as a parking brake.

  After the preparation operation is detected by the charge preparation determination unit 34, the charge determination unit 36 prohibits charging from the external power source 19 to the high-voltage battery 11 until the movement of the electric vehicle is blocked by a P request control unit 37 described later. Including charging prohibition means. The charging prohibiting means is external until the movement of the electric vehicle is blocked by the P request control means 37 and the movement of the electric vehicle is blocked by the power control means 33 after the preparation operation is detected by the charging preparation determination means 34. Prohibit charging the battery from the power source. Further, the charging determination unit 36 includes a charging permission unit that permits charging from the external power source 19 to the high voltage battery 11 when the movement of the electric vehicle is blocked by the P request control unit 37. The charging permission unit permits charging of the battery from the external power source when the movement of the electric vehicle is blocked by the P request control unit 37 and the movement of the electric vehicle is blocked by the power control unit 33.

  The parking ECU 22 controls the parking lock mechanism 14 and / or the brake device 15. The parking ECU 22 executes parking control for shifting the electric vehicle to a parking state by an electric control process and an electric actuator. The parking ECU 22 can switch the parking lock mechanism 14 between a locked state, that is, a P range state, and an unlocked state, that is, a non-P range state. The parking ECU 22 can switch the brake device 15 between an on state in which it operates as a parking brake and an off state in which it does not function as a parking brake.

  The parking operation device 23 is an operation device for inputting and instructing a user's request operation for requesting cancellation of the movement prevention of the electric vehicle by the parking devices 14 and 15. The parking operator 23 includes a device for inputting a user operation for selecting the P range or the Non-P range. The parking operator 23 is provided by a switch for instructing parking lock, for example. The parking operator 23 may include a device that inputs a user operation for operating the parking brake. The parking operation device 23 may be provided by a shift lever and a switch that detects its operation position.

  The parking ECU 22 includes P request control means (PRCM) 37 that executes parking control in response to a P request signal from the power system ECU 21. The parking process performed by the parking control can include a process of controlling the parking lock mechanism 14 to a locked state and / or a process of operating the brake device 15 as a parking brake. The P request control means 37 provides parking control means for preventing the movement of the electric vehicle by the parking devices 14 and 15 when the preparation operation is detected by the charge preparation determination means 34.

  The parking ECU 22 includes an operation control means (UOCM) 38 that controls the parking lock mechanism 14 and / or the brake device 15 in response to the parking operator 23. In response to the parking operator 23, the operation control means 38 releases the movement prevention of the electric vehicle by the parking devices 14, 15. When the user selects the P range with the parking operation device 23, the operation control means 38 controls the parking lock mechanism 14 to the locked state. Further, when the user selects the Non-P range by the parking operation device 23, the operation control means 38 controls the parking lock mechanism 14 to the unlocked state. Further, when the user instructs the parking brake to be actuated by the parking operator 23, the operation control means 38 controls the brake device 15 to the braking force generation state.

  Furthermore, the parking ECU 22 includes priority processing means (PRTM) 39 that prioritizes the P request signal from the power system ECU 21 over the signal from the parking operator 23. In other words, the priority processing means 39 gives priority to the processing by the P request control means 37 over the processing by the operation control means 38. Here, the processing by the operation control means 38 is invalidated, and only the processing by the P request control means 37 is validated. That is, when the parking devices 14 and 15 block the movement of the electric vehicle by the P request control unit 37, the priority processing unit 39 invalidates the cancellation of the electric vehicle movement block by the operation control unit 38 and blocks the movement of the electric vehicle. Let it continue.

  The control device is provided by a microcomputer including a computer-readable storage medium. The storage medium stores a computer-readable program. The storage medium can be provided by a memory. By being executed by the control device, the program causes the control device to function as the device described in this specification, and causes the control device to function so as to execute the control method described in this specification. The means provided by the control device can also be called a functional block or module that achieves a predetermined function.

  FIG. 2 is a sequence diagram showing operations and processing in one usage example of the first embodiment. In the figure, a sequence from when the user stops the electric vehicle to when charging is performed is illustrated. In the figure, the operation of the user 24, the processing of the external power supply 19, the processing of the power system ECU 21, and the processing of the parking ECU 22 are shown. In the figure, the vertical axis indicates the passage of time, that is, the flow of operations and processes.

  The user stops the electric vehicle in operation 41. At this time, the power source of the electric vehicle remains on. That is, the ignition switch or a switch corresponding to the ignition switch remains in the on state. The shift device is in the neutral range. At this time, the external power source 19 detects that the cable 18 is not connected in processing 42. The power system ECU 21 detects in step 43 that the electric vehicle is in a power supply state, that is, that electric power is being supplied from the high voltage battery 11 to the rotating electrical machine 12. It is also detected that it is in the neutral range. The parking ECU 22 detects that the parking lock mechanism 14 is in the Non-P range, that is, the unlocked state.

  When the user connects the cable 18 in the operation 45, a series of processing is started. It is detected in processes 46 and 47 that the cable 18 is connected. In process 48, power system ECU 21 determines whether charging is prohibited or permitted by determining whether a condition for charging is satisfied. In process 48, since the electric vehicle is only stopped and the parking process is not performed, it is determined that charging is prohibited. Process 48 provides a charge prohibition means. In this process, a signal for stopping the power supply from the external power source 19 to the high voltage battery 11 is transmitted to the external power source 19. In step 49, the external power source 19 shifts to a charge standby state in response to the charge prohibition determination. The process 49 provides a means for waiting without starting charging when the parking process is not completed even though the charging preparation process is completed by connecting the cable 18. As a result, power supply from the external power source 19 to the cable 18 is avoided. Thereafter, in process 50, power system ECU 12 shifts the electric vehicle to an inactive state. That is, the power supply to the rotating electrical machine 12 is interrupted. Thereby, the electric vehicle is in a state where it cannot travel by the rotating electrical machine 12.

  Furthermore, power system ECU 12 transmits a P request signal to parking ECU 22 in process 51. Parking ECU 22 detects a P request signal in process 52. In step 53, the parking ECU 22 performs parking control. Thereafter, the parking ECU 22 determines in step 54 that the electric vehicle has shifted to the parking state. Here, it is determined that the parking lock mechanism 14 has been locked, that is, has shifted to the P range. In processing 55, power system ECU 21 determines that the electric vehicle has shifted to the parking state.

  In process 56, power system ECU 21 permits charging in response to the determination of the parking state. Process 56 provides a charging permission means. In this process, a signal for starting power supply from the external power supply 19 to the high voltage battery 11 is transmitted to the external power supply 19. In response to this, the external power source 19 starts supplying power for charging in processing 57. The process 57 provides a means for starting charging when the charge preparation process is completed and the parking process is completed. As a result, in processing 58, charging from the external power source 19 to the high voltage battery 11 is executed. Processing 49 and processing 57 provide charging control means provided in the external power source 19. In other words, the process 49 and the process 57 are provided in the external power source 19 and provide means for starting charging when the parking process by the electric actuator in the electric vehicle is completed.

  When charging is finished, the cable 18 is removed. Further, in response to the operation of the parking operator 23 by the user, the parking lock mechanism 14 is controlled to the unlocked state, and the brake device 15 is controlled to the state where the parking brake is released.

  In this operational example, the operation 45 places the electric vehicle in a chargeable state even though the electric vehicle is not parked. Such a state is an inappropriate state as a state for performing charging. In this case, charging is prohibited and charging is interrupted by processing 48 and processing 49. Further, the electric vehicle is shifted to the inactive state by the process 50, and the movement by the rotating electrical machine 12 is made impossible. Furthermore, the parking process is performed by the electric control process in the electric vehicle by the process 50 to the process 55. As a result, the electric vehicle is forcibly shifted to an appropriate state in order to automatically perform charging.

  FIG. 3 is a flowchart showing a process 160 of the power system ECU 21 according to the first embodiment. In step 161, it is determined whether or not the cable 18 is connected. Step 161 provides processing 47. If the cable 18 is connected, go to step 162. In step 162, it is determined whether or not the rotating electrical machine 12 as a power source is inactive, that is, whether or not the power supply from the high voltage battery 11 to the rotating electrical machine 12 is interrupted. The process of step 162 is a process of determining whether or not the electric vehicle is in a ready-off state. If the power source is inactive, go to step 163. In step 163, it is determined whether or not the engine is in the P range, that is, whether or not the parking lock mechanism 14 is in the locked state. If it is determined in step 163 that the P range is selected, the process proceeds to step 164. In step 164, charging is permitted. Here, a signal indicating charging permission is transmitted from power system ECU 21 to external power supply 19.

  If the cable 18 is not connected in step 161, the process proceeds to step 165. In step 165, charging is prohibited. Here, a signal indicating charging prohibition is transmitted from power system ECU 21 to external power supply 19. In step 162, if the power source is not inactive, the process proceeds to step 166. In step 166, the electric vehicle is deactivated. As a result, the rotating electrical machine 12 is not rotated. Step 166 provides a process 50. After the power source is shifted to inactive by step 166, the process proceeds to step 163. In step 163, if not in the P range, that is, if in the non-P range, the process proceeds to step 167. In step 167, a P request signal is transmitted to the parking ECU 22. Step 51 provides a process 51. Thereafter, the process proceeds to step 165.

  FIG. 4 is a flowchart showing a process 170 of the parking ECU 22 according to the first embodiment. In step 171, it is determined whether or not a P request signal is received from power system ECU 21. Step 171 provides a process 52. If the P request signal is received, the process proceeds to step 172. In step 172, it is determined whether or not the parking lock mechanism 14 is in the P range, that is, in the locked state. When the parking lock mechanism 14 is in the P range, the process proceeds to step 173. In step 173, it is determined whether or not the user has switched to the Non-P range. When the switching operation to the Non-P range is performed, the process proceeds to Step 174. In step 174, the Non-P operation by the user is canceled. Further, in step 174, the user is notified that the operation has been canceled. That is, when there is a P request from the power system ECU 21, manual switching to the Non-P range is prohibited. This ensures that the parking condition required for charging is provided. In step 175, the parking state provided by the parking lock mechanism 14 and / or the brake device 15 is determined. Here, whether or not the parking state provided by the parking lock mechanism 14 and / or the brake device 15 is effectively provided is stored in the memory device. The data stored in the memory device is used in the parking ECU 22 and further in the power system ECU 21 to determine whether or not the electric vehicle is parked. For example, the memory device stores whether the parking lock mechanism 14 is in the locked state or in the unlocked state. Further, whether or not the brake device 15 is operating as a parking brake is stored in the memory device.

  If there is no P request signal in step 171, the process proceeds to step 177. In step 177, it is determined whether or not the user has switched to the Non-P range. When the switching operation to the Non-P range is performed, the process proceeds to Step 178. In step 178, the parking lock mechanism 14 is unlocked in response to a Non-P operation by the user. Thereafter, the process proceeds to step 175. If it is determined in step 177 that switching to the non-P range has not been performed, the process proceeds to step 179. In step 179, it is determined whether or not the user has switched to the P range. When the switching operation to the P range is performed, the process proceeds to step 180. In step 180, the parking lock mechanism 14 is controlled to be locked in response to the P operation by the user. Thereafter, the process proceeds to step 175. In step 179, if the switching operation to the P range is not performed, the process proceeds to step 175.

  If the parking lock mechanism 14 is not in the P range in step 172, the process proceeds to step 176. In step 176, a parking process is executed. Here, the parking lock mechanism 14 is controlled to be locked. Further, the brake device 15 is controlled so as to operate as a parking brake. Thereafter, the process proceeds to step 173. In step 173, when the switching operation to the Non-P range is not performed, the process proceeds to step 175.

  In this process 170, a process 53 is provided by steps 172 and 176. Also, step 175 provides a procedure 54. In addition, since the steps 171, 172, and 176 execute the parking control for performing the parking process in response to the P request, the P request control means 37 is provided by these steps. Further, since steps 173, 177, 178, 179, 180 control the parking lock mechanism 14 in response to the user's operation, the operation control means 38 is provided by these steps. Further, since step 174 invalidates the user's operation and validates the parking control in response to the P request, the priority control means 39 is provided.

  According to the embodiment described above, when the high voltage battery 11 is charged from the external power source 19, the movement of the electric vehicle can be reliably prevented. Specifically, when the cable 18 is connected without performing the parking process of the electric vehicle, the parking process is executed by the electric actuator. As a result, the movement of the electric vehicle is prevented. In addition, charging is prohibited when the cable 18 is connected without the electric vehicle being parked. Further, the start of charging is suspended until the parking process is executed and completed by the electric actuator. As a result, charging while the electric vehicle is movable is prevented.

  In addition, when the cable 18 is connected while the power supply of the electric vehicle is on, the start of charging is suspended until the electric vehicle is automatically deactivated and the parking state of the electric vehicle is confirmed. As a result, charging while the electric vehicle is movable is prevented.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  For example, in the above-described embodiment, a so-called electric vehicle including only a rotating electric machine as a power source has been described. Instead of this, the present invention may be applied to a vehicle equipped with both a rotating electrical machine and an internal combustion engine as a power source for traveling. The present invention can be widely applied to an electric vehicle that can be charged from an external power source.

  In the above embodiment, both the parking lock mechanism 14 and the brake device 15 are used in order to place the electric vehicle in the parking state. Instead, at least one of the parking lock mechanism 14 and the brake device 15 may be used.

  In the above-described embodiment, the standby unit 31 and the start unit 32 are provided only in the external power source 19, but the standby unit 31 and the start unit 32 may be provided in the charging circuit 17.

  In the above embodiment, a plurality of functions as the electric vehicle control device 2 are realized by the power system ECU 21 and the parking ECU 22, but these functions are realized by a single ECU or three or more ECUs. Also good.

  Moreover, in the said embodiment, the connection operation which connects the external power supply 19 and the high voltage battery 11 with the cable 18 was detected as preparation operation for charge. Alternatively, the opening of the lid accommodating the charging terminal or the activation of the charging circuit 17 may be detected as a preparation operation. When a non-contact power supply device is used instead of the cable 18, activation of the non-contact power supply device or detection that the electric vehicle is positioned at a regular position for charging may be detected.

  Further, the means and functions provided by the control device can be provided by software only, hardware only, or a combination thereof. For example, the control device may be configured by an analog circuit.

DESCRIPTION OF SYMBOLS 1 Drive system 2 Control apparatus for electric vehicles 11 High voltage battery 12 Rotating electric machine 13 Power transmission mechanism 14 Parking lock mechanism 15 Brake device 16 Drive wheel 17 Charging circuit 18 Cable 19 External power source 21 Power system ECU
22 Parking ECU
23 Parking controller

Claims (10)

In an electric vehicle control device for an electric vehicle, comprising: a battery (11) that can be charged from an external power source (19); and a rotating electric machine (12) that drives the drive wheels (16) by electric power supplied from the battery. ,
Charging preparation determination means (34, 46, 47, 161) for detecting a preparatory operation for charging the battery;
A parking device (14, 15) for preventing movement of the electric vehicle;
Parking control means (21, 22, 35, 37, 51-55, 167, 176) for preventing movement of the electric vehicle by the parking device when the preparation operation is detected by the charging preparation determination means. An electric vehicle control device characterized by the above. After the preparation operation is detected by the charge preparation determination means, charge prohibition means (36, 48) for prohibiting charging of the battery from the external power supply until the parking control means prevents movement of the electric vehicle. 165),
2. A charging permission unit (36, 56, 164) that permits charging of the battery from the external power source when the parking control unit prevents the electric vehicle from moving. The control apparatus for electric vehicles as described in.   Further, when the preparatory operation is detected by the charge preparation determining means, power control means (33, 50, 162, 166 for preventing movement of the electric vehicle by the rotating electrical machine by deactivating the electric vehicle. The control apparatus for electric vehicles of Claim 2 characterized by the above-mentioned. The charge prohibiting means (36, 48, 165) is configured to prevent the electric vehicle from moving by the parking control means after the preparation operation is detected by the charge preparation determining means, and the electric power control means to Prohibit charging of the battery from the external power source until the vehicle is prevented from moving;
The charging permission means (36, 56, 164) is configured to receive the battery from the external power source when the parking control means prevents the movement of the electric vehicle and the power control means prevents the movement of the electric vehicle. The electric vehicle control device according to claim 3, wherein charging of the electric vehicle is permitted. The charging prohibition means transmits a signal for stopping power supply from the external power source to the battery to the external power source,
5. The electric vehicle control device according to claim 1, wherein the charging permission unit transmits a signal for starting power supply from the external power source to the battery to the external power source. 6. . An operating device (23) for instructing cancellation of movement inhibition of the electric vehicle by the parking device (14, 15);
Operation control means (38, 173, 177-180) for releasing the movement prevention of the electric vehicle by the parking device in response to the operation device;
When the parking device prevents the electric vehicle from moving by the parking control means, the priority processing means (39, 39) disables the release of the electric vehicle movement prevention by the operation control means and continues the electric vehicle movement prevention. 174). The electric vehicle control device according to any one of claims 1 to 5, wherein   The electric vehicle according to any one of claims 1 to 6, wherein the preparation operation detected by the charge preparation determination unit is a connection operation of connecting the external power source and the battery by a cable. Control device.   The parking device includes a parking lock mechanism (14) that prevents the electric vehicle from moving by restricting the rotation of a rotating shaft in a power transmission mechanism (13) provided between the rotating electrical machine and the driving wheel. The control device for an electric vehicle according to claim 1, wherein the control device is for an electric vehicle.   The electric vehicle according to any one of claims 1 to 8, wherein the parking device is a brake device (15) that blocks the movement of the electric vehicle by braking the rotation of the drive wheel. Control device. The charging preparation determining means is provided in a power system electronic control device (21) for controlling the rotating electrical machine,
The parking control means is provided in a parking electronic control device (22) for controlling the parking device,
When the preparatory operation is detected by the charge preparation determining means, the power system electronic control device transmits a parking request signal for requesting the parking control means to prevent the parking device from moving the electric vehicle. The control device for an electric vehicle according to any one of claims 1 to 9, further comprising request means (35).

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