Electric vehicle

Abstract

An electric vehicle of the present disclosure includes: a battery; the access port is connected with a power supply connector of external charging equipment; a predetermined in-vehicle device that uses the auxiliary battery as a power source and is used for charging the battery; and a control device that, while the power supply connector is connected to the access port, activates a predetermined in-vehicle device in response to an activation request periodically transmitted from the external charging device, and stops the predetermined in-vehicle device in response to the transmission of the activation request being stopped. When the charging of the battery is stopped and the power supply connector is connected to the access port, the control device prohibits the start-up of the predetermined in-vehicle device in response to the start-up request when a physical quantity indicating the power consumption of the predetermined in-vehicle device is equal to or greater than a preset threshold value.

Description

Technical Field

[0001] The present disclosure relates to an electrified vehicle that can charge a storage battery using electric power from an external charging device. Background Art

[0002] Conventionally, there has been known a vehicle including a storage battery and a control device having an arithmetic unit and a storage unit, which can charge the storage battery using electric power from a charging pile (for example, refer to Japanese Unexamined Patent Application Publication No. 2020-120445). In this vehicle, when it is confirmed by the arithmetic unit that there is a charging abnormality after charging of the storage battery at a non-compliant charging pile or the like ends, abnormality information related to the charging abnormality, response control, and pile information of the charging pile are stored in the storage unit in association with each other. Further, when charging the storage battery at the same or a different charging pile later, the control device requests the charging pile for the response control stored in the storage unit or the response control set based on the abnormality information. Summary of the Invention

[0003] In addition, when charging the storage battery of a vehicle using electric power from an external charging device, various signals are sent from the external charging device to the vehicle during the period from when the power supply connector of the external charging device is connected to the vehicle's access port until it is removed. Thus, in a vehicle as described above, when a request that is not determined to be abnormal on the vehicle side is sent from the external charging device, a process corresponding to the request is executed on the vehicle side. However, depending on the content of the request from the external charging device, there may be an adverse situation on the vehicle side due to executing a process corresponding to the request on the vehicle side.

[0004] Therefore, a main object of the present disclosure is to satisfactorily suppress an adverse situation from occurring in an electrified vehicle due to a request from an external charging device during the period when the power supply connector of the external charging device is connected to the access port of the electrified vehicle.

[0005] The electrified vehicle of the present disclosure includes: a storage battery, and an access port to which a power supply connector of an external charging device is connected, and can charge the storage battery using electric power supplied from the external charging device to the access port via the power supply connector. The electrified vehicle includes:

[0006] a predetermined in-vehicle device that uses an auxiliary machine storage battery as a power source and is used for charging the storage battery; and

[0007] The control device starts the predetermined in-vehicle device according to a start request periodically transmitted from the external charging device during the period when the power supply connector is connected to the connection port, and stops the predetermined in-vehicle device according to the stop of the transmission of the start request. When a physical quantity representing the power consumption of the predetermined in-vehicle device becomes equal to or greater than a preset threshold during the period when the charging of the storage battery stops and the power supply connector is connected to the connection port, the start of the predetermined in-vehicle device corresponding to the start request is prohibited.

[0008] The electric vehicle of the present disclosure is an electric vehicle capable of charging a storage battery with electric power supplied from an external charging device to a connection port via a power supply connector. The electric vehicle of the present disclosure includes a control device and a predetermined in-vehicle device that uses an auxiliary battery as a power source and is used for charging the storage battery. The control device starts the predetermined in-vehicle device according to a start request periodically transmitted from the external charging device during the period when the power supply connector is connected to the connection port, and stops the predetermined in-vehicle device according to the stop of the transmission of the start request. Here, when the in-vehicle device starts according to a start request from the external charging device, electric power from the auxiliary battery is supplied to the predetermined in-vehicle device until the transmission of the start request is stopped by the external charging device. Therefore, when the start request is repeatedly transmitted from the external charging device during the period when the charging of the storage battery stops while the power supply connector is connected to the connection port, the remaining capacity of the auxiliary battery decreases. Then, depending on the situation, the auxiliary battery may become over-discharged (a power shortage state where the power consumption exceeds the power storage capacity). In view of this, the control device of the vehicle of the present disclosure prohibits the start of the predetermined in-vehicle device corresponding to the start request from the external charging device when a physical quantity becomes equal to or greater than a preset threshold during the period when the charging of the storage battery stops and the power supply connector of the external charging device is connected to the connection port. The physical quantity represents the power consumption of the predetermined in-vehicle device. Thereby, even when the start request is repeatedly transmitted from the external charging device during the period when the charging of the storage battery stops while the power supply connector is connected to the connection port, it is possible to suppress the decrease in the remaining capacity of the auxiliary battery so that the auxiliary battery does not become over-discharged. The over-discharged state is a power shortage state where the power consumption exceeds the power storage capacity. As a result, in the electric vehicle of the present disclosure, during the period when the power supply connector of the external charging device is connected to the connection port of the electric vehicle, it is possible to satisfactorily suppress the occurrence of an abnormal situation due to a request from the external charging device.

[0009] Alternatively, the physical quantity may be the number of starts of the predetermined in-vehicle device during the period when the charging of the storage battery stops and the power supply connector is connected to the connection port.

[0010] The physical quantity may also be the operating time of the predetermined in-vehicle device during a period in which charging of the storage battery stops and the power supply connector is connected to the access port.

[0011] Alternatively, the physical quantity may be the amount of discharged electric power of the auxiliary battery during a period in which charging of the storage battery stops and the power supply connector is connected to the access port.

[0012] Furthermore, when the power supply connector is removed from the access port, the control device may cancel the prohibition of starting the predetermined in-vehicle device corresponding to the start request, and reset the physical quantity to zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Hereinafter, features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described with reference to the drawings, in which like reference numerals denote like elements, and wherein:

[0014] Figure 1 is a schematic configuration diagram of an electric vehicle according to the present disclosure;

[0015] Figure 2 is a flowchart of a routine executed by a control device of the electric vehicle according to the present disclosure;

[0016] Figure 3 is an example of execution Figure 2 a time chart of the states of the vehicle and an external charging device when executing the routine;

[0017] Figure 4 is a flowchart of another routine that can be executed by a control device of the electric vehicle according to the present disclosure;

[0018] Figure 5 is a flowchart of still another routine that can be executed by a control device of the electric vehicle according to the present disclosure. DETAILED DESCRIPTION

[0019] Next, specific embodiments of the present disclosure will be described with reference to the drawings.

[0020] Figure 1 is a schematic configuration diagram of an electric vehicle 1 according to the present disclosure. The electric vehicle 1 shown in this figure is a battery electric vehicle (BEV) including a storage battery (power storage device) 2, a normally open system main relay SMR, a power control unit (hereinafter referred to as "PCU") 3, an auxiliary battery 4 having a voltage lower than that of the storage battery 2, and an electric generator MG. However, the electric vehicle 1 may also be a plug-in hybrid vehicle (PHEV) including an internal combustion engine (engine) in addition to the storage battery 2, the electric generator MG, and the like.

[0021] The storage battery 2 is, for example, a lithium-ion secondary battery or a nickel-metal hydride secondary battery having a rated output voltage of 200 to 800V. The positive-side power line PL is connected to the positive terminal of the storage battery 2 via the positive-side relay of the system main relay SMR. The negative-side power line NL is connected to the negative terminal of the storage battery 2 via the negative-side relay of the system main relay SMR.

[0022] The PCU 3 includes a converter (drive circuit) 3i for driving the motor generator MG, a boost converter 3c, etc., and is connected to the storage battery 2 via the positive-side power line PL, the negative-side power line NL, and the system main relay SMR. The auxiliary battery 4 is, for example, a lead-acid battery having a rated output voltage of about 12V. The auxiliary battery 4 supplies power (including excitation power) to auxiliary devices such as an electronic control unit, a relay, and a sensor which are in-vehicle devices of the electric vehicle 1.

[0023] The motor generator MG is a synchronous generator motor (three-phase AC motor). The rotor of the motor generator MG is connected to the drive shaft DS connected to the drive wheels DW via a power transmission mechanism including a reduction gear and a differential gear. The motor generator MG is driven by the power from the PCU 3 (storage battery 2) and outputs a driving torque (driving force) to the drive shaft DS. In addition, the motor generator MG outputs a regenerative braking torque to the drive shaft DS when the electric vehicle 1 brakes.

[0024] As Figure 1 shown, the electric vehicle 1 further includes a charging inlet 5 and a power device 6. The charging inlet 5 is disposed inside a charging lid (not shown) provided on the vehicle body of the electric vehicle 1 and is connected to the power device 6. The charging inlet 5 includes an AC socket (not shown) for connecting (inserting) the power supply connector 51 of the external charging device 50. The external charging device 50 is, for example, a charging pile including an AC charger, a control device 55, etc. connected to the power supply connector 51 via a charging cable.

[0025] The power device 6 includes an AC / DC converter and a DC / DC converter, and is connected to the positive-side power line PL and the negative-side power line NL between the system main relay SMR and the PCU 3 via the charging relay CHR. When the charging relay CHR and the system main relay SMR are closed, the AC socket of the charging inlet 5 is connected to the storage battery 2 via the power device 6, etc. Thus, when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5, the storage battery 2 can be charged using the power supplied from outside the vehicle via the power supply connector 51, etc.

[0026] The electric vehicle 1 further includes a battery electronic control unit (hereinafter referred to as "battery ECU") 8 that manages the battery 2, and a charging electronic control unit (hereinafter referred to as "charging ECU") 10. The battery ECU 8 includes a microcomputer having a CPU, ROM, RAM, storage device, etc., not shown. The battery ECU 8 obtains the voltage between the terminals of the battery 2, the charge and discharge current, the temperature, etc. from the corresponding sensors, and calculates the SOC of the battery 2, the allowable charging power Win, the allowable discharge power Wout, etc. based on these physical quantities. The charging ECU 10 includes a microcomputer having a CPU, ROM, RAM 10a, backup RAM 10b, storage device, etc. The RAM 10a of the charging ECU 10 is a volatile memory, and the backup RAM 10b is powered by the auxiliary battery 4 to continue to hold information when the electric vehicle 1 is in the sleep state.

[0027] The charging ECU 10 exchanges information with the battery ECU 8, and controls the opening and closing of the charging relay CHR while controlling the power device 6. In addition, when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 (AC socket) of the electric vehicle 1, the charging ECU 10 is connected to the control device 55 of the external charging device 50 via a communication line not shown. The control device 55 includes a microcomputer having a CPU, ROM, RAM, storage device, etc., not shown. Various information such as a start request for the electric vehicle 1 is exchanged between the control device 55 and the charging ECU 10, and the power device of the external charging device 50 is controlled.

[0028] In the present embodiment, after the power supply connector 51 is connected to the charging inlet 5, the charging ECU 10 is started according to a start request (pulse signal) from the external charging device 50. Moreover, in order to allow the start of a predetermined in-vehicle device used for charging the battery 2 corresponding to the start request, the charging ECU 10 sets the start prohibition flag Fp stored in the backup RAM 10b to "0". Then, the charging ECU 10 starts the power supply from the auxiliary battery 4 to the predetermined in-vehicle device. In the present embodiment, the predetermined in-vehicle devices include: corresponding sensors connected to the charging ECU 10, the system main relay SMR, the charging relay CHR, the battery ECU 8, corresponding sensors connected to the battery ECU 8, etc. In addition, when the transmission of the start request (pulse signal) from the external charging device 50 to the charging ECU 10 is stopped, the charging ECU 10 stops the power supply from the auxiliary battery 4 to the predetermined in-vehicle devices such as the battery ECU 8 started according to the start request. Then, when the predetermined in-vehicle device stops, the electric vehicle 1 including the charging ECU 10 transitions to the sleep state.

[0029] Figure 2It is a flowchart showing a routine repeatedly executed by the charging ECU 10 at predetermined intervals (short time) during the connection of the power supply connector 51 of the external charging device 50 to the charging inlet 5 (AC socket) of the electric vehicle 1.

[0030] When Figure 2 the execution timing of the routine arrives, the charging ECU 10 acquires information such as the value of the connector connection flag, the value of the count completion flag F, and the value of the charging flag (S100). The connector connection flag is set to "0" when the power supply connector 51 of the external charging device 50 is not connected to the charging inlet 5. Moreover, the connector connection flag is a flag set to "1" when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5. The count completion flag F is a flag set to "1" when a predetermined process is executed. The charging flag is set to "0" when the charging of the storage battery 2 stops, and is set to "1" when the storage battery 2 is being charged. In the present embodiment, the values of the connector connection flag and the charging flag are stored in the above-mentioned backup RAM 10b. In addition, the value of the count completion flag F is stored in the RAM 10a and is reset to "0" when the electric vehicle 1 (charging ECU 10) transitions to the sleep state.

[0031] Next, the charging ECU 10 determines whether the power supply connector 51 is connected to the charging inlet 5 based on the value of the connector connection flag acquired in S100 (S110). When the power supply connector 51 is connected to the charging inlet 5 (Yes in S110), the charging ECU 10 determines whether the value of the count completion flag F acquired in S100 is "0" (S120). When the value of the count completion flag F is "0" (Yes in S120), the charging ECU 10 checks whether a start request (pulse signal) has been sent from the external charging device 50 (control device 55) including the power supply connector 51 (S130).

[0032] When no start request is sent from the external charging device 50 (No in S140), the charging ECU 10 skips the subsequent processing and once ends Figure 2 the routine. In addition, when a start request is sent from the external charging device 50 (Yes in S140), the charging ECU 10 determines whether the charging of the storage battery 2 has stopped based on the value of the charging flag acquired in S100 (S150). When the value of the charging flag is "1" and the charging of the storage battery 2 is being performed (No in S150), the charging ECU 10 resets the value of a predetermined count C stored in the backup RAM 10b to zero (S200) and once ends Figure 2 the routine.

[0033] In addition, when the value of the charging flag is "0" and the charging of the storage battery 2 has stopped (Yes in S150), the charging ECU 10 increments (adds one) the above-mentioned count C stored in the backup RAM 10b (S160). Then, the charging ECU 10 sets the count completion flag F stored in the RAM 10a to "1" (S170). Next, the charging ECU 10 determines whether the count C is equal to or greater than a preset threshold Cref (S180). When the count C is less than the threshold Cref (No in S180), the charging ECU 10 ends the Figure 2 routine at this point. In this case, the charging ECU 10 separately starts a predetermined in-vehicle device such as the battery ECU 8 according to a start request from the external charging device 50. Electric power from the auxiliary battery 4 is continuously supplied to the predetermined in-vehicle device started according to this start request until the start request (pulse signal) from the external charging device 50 is stopped.

[0034] In addition, after the count completion flag F is set to "1" in S170, when the processing after S100 is executed and it is determined to be "No" in S120, the subsequent processing is skipped. That is, after the count completion flag F is once set to "1" in S170, the count C is not incremented until the count completion flag F is reset according to the transition to the sleep state. Therefore, the count C corresponds to the number of times the above-mentioned predetermined in-vehicle device is started (and the number of start requests from the external charging device 50) during the period when the charging of the storage battery 2 stops and the power supply connector 51 is connected to the charging inlet 5.

[0035] On the other hand, when the count C is equal to or greater than the threshold Cref (Yes in S180), the charging ECU 10 sets the start inhibition flag Fp stored in the backup RAM 10b to "1" (S190) in order to inhibit the start of the above-mentioned predetermined in-vehicle device corresponding to the start request from the external charging device 50, and ends the Figure 2 routine at once. When the charging ECU 10 sets the start inhibition flag Fp to "1" in S190, even if a start request is sent from the external charging device 50 later, the start inhibition flag Fp is maintained at "1". Therefore, when the start inhibition flag Fp is set to "1" in S190, even if a start request is sent from the external charging device 50 thereafter, the predetermined in-vehicle device such as the battery ECU 8 will not start, and the electric vehicle 1 maintains the sleep state.

[0036] In addition, there is a case where it is determined that the power supply connector 51 is not connected to the charging inlet 5 based on the value of the connector connection flag obtained in S100 (in S110, "No"). In this case, the charging ECU 10 sets the start inhibition flag Fp stored in the backup RAM 10b to "0" in order to allow the start of the above-mentioned predetermined in-vehicle device corresponding to the start request from the external charging device 50 (S195). Moreover, the charging ECU 10 resets the above-mentioned count C to zero (S200) and once ends Figure 2 the routine.

[0037] As a result of executing the routine as described above Figure 2 in the electric vehicle 1, during the period when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 and the charging of the storage battery 2 has stopped, as Figure 3 shown, the predetermined in-vehicle devices such as the battery ECU 8 are started according to the start request from the external charging device 50 (control device 55) (refer to Figure 3 the moment t1 in). In addition, the charging ECU 10 stops the predetermined in-vehicle devices such as the battery ECU 8 according to the stop of the transmission of the start request from the external charging device 50 (refer to Figure 3 the moment t2 in), and the electric vehicle 1 is shifted to the sleep state.

[0038] Here, in the control device 55 of the external charging device 50, there is also a control device that periodically and repeatedly sends a start request to the electric vehicle 1 during the period when the charging of the storage battery 2 is completed (charging stops) and the power supply connector 51 is connected to the charging inlet 5 of the electric vehicle 1. For example, one of such control devices 55 outputs a pulse signal as a start request continuously for a predetermined time, and then, for example, stops the output of the pulse signal for several seconds to 30 seconds and outputs the pulse signal continuously for a predetermined time again. In addition, when the predetermined in-vehicle device is started according to the start request from the external charging device 50, power is supplied to the predetermined in-vehicle device from the auxiliary battery 4 until the transmission of the start request from the external charging device 50 stops. Sometimes, the start request is repeatedly sent from the external charging device 50 during the period when the charging of the storage battery 2 stops in the state where the power supply connector 51 is connected to the charging inlet 5. In this case, the remaining capacity of the auxiliary battery 4 decreases, and depending on the situation, the auxiliary battery 4 may become over-discharged (a power shortage state where the power consumption exceeds the power storage capacity).

[0039] In view of this, in the electric vehicle 1, when the count C corresponding to the number of starts of the predetermined in-vehicle device during the period when the charging of the storage battery 2 stops and the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 becomes equal to or greater than a preset threshold value Cref (in S180, "Yes", refer to Figure 3At time t3), the ECU 10 prohibits the start of a predetermined in-vehicle device corresponding to a start request from the external charging device 50 (S190). Thus, even if a start request is repeatedly sent from the external charging device 50 during the period when the charging of the battery 2 stops while the power supply connector 51 is connected to the charging inlet 5, it is possible to suppress a decrease in the remaining capacity of the auxiliary battery 4 so that the auxiliary battery 4 does not enter an over-discharged state (a power shortage state where the power consumption exceeds the power storage capacity). As a result, in the electric vehicle 1, it is possible to satisfactorily suppress the occurrence of problems due to the start request from the external charging device 50 during the period when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 of the electric vehicle 1.

[0040] In addition, the count C corresponds to the number of starts of a predetermined in-vehicle device (such as the battery ECU 8) during the period when the charging of the battery 2 stops and the power supply connector 51 is connected to the charging inlet 5. The count C represents the power consumption of the predetermined in-vehicle device during the period when the charging of the battery 2 stops and the power supply connector 51 is connected to the charging inlet 5. That is, the amount of power consumed by the predetermined in-vehicle device such as the battery ECU 8 from the start according to the start request from the external charging device 50 until the stop can be estimated in advance. Therefore, by incrementing the count C to count the number of starts of the predetermined in-vehicle device, the charging of the battery 2 can be stopped. And the power consumption of the predetermined device during the period when the power supply connector 51 is connected to the charging inlet 5 can be accurately grasped. As a result, if the start of a predetermined in-vehicle device corresponding to a start request from the external charging device 50 is prohibited when the count C becomes equal to or greater than a preset threshold Cref (in S180, "Yes", S190), it is possible to extremely satisfactorily suppress a decrease in the remaining capacity of the auxiliary battery 4.

[0041] Moreover, when the power supply connector 51 is removed from the charging inlet 5 (in S110, "No", refer to Figure 3 At time t4), the prohibition of the start of a predetermined in-vehicle device corresponding to the start request is released (S195). And the charging ECU 10 resets the count C, which is a physical quantity corresponding to the power consumption of the predetermined in-vehicle device, to zero (S200). Thus, when the power supply connector 51 is connected to the charging inlet 5 again, it is possible to smoothly start charging the battery 2 using the power from the external charging device 50.

[0042] Figure 4 is a flowchart showing another routine that can be repeatedly executed by the above-mentioned charging ECU 10 at predetermined intervals (very short time) during the period when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 (AC socket) of the electric vehicle 1.

[0043] When Figure 4When the execution timing of the routine arrives, the charging ECU 10 acquires the necessary information such as the value of the connector connection flag and the value of the charging flag (S100), and determines whether the power supply connector 51 is connected to the charging inlet 5 (S110). When the power supply connector 51 is connected to the charging inlet 5 (Yes in S110), the charging ECU 10 checks whether a start request has been sent from the external charging device 50 (control device 55) including the power supply connector 51 (S130).

[0044] When no start request is sent from the external charging device 50 (No in S140), the charging ECU 10 skips the subsequent processing and causes Figure 4 the routine to end once. In addition, when a start request is sent from the external charging device 50 (Yes in S140), the charging ECU 10 determines whether the charging of the storage battery 2 has stopped (S150). When the charging of the storage battery 2 is being carried out (No in S150), the charging ECU 10 resets the predetermined count Ct stored in the backup RAM 10b to zero (S200B) and ends Figure 4 the routine once.

[0045] In addition, when the charging of the storage battery 2 has stopped (Yes in S150), the charging ECU 10 increments the above-mentioned count Ct stored in the backup RAM 10b (S160B). Moreover, the charging ECU 10 determines whether the count Ct is equal to or greater than a preset threshold Ctref (S180B). When the count Ct is less than the threshold Ctref (No in S180B), the charging ECU 10 ends Figure 4 the routine at that time point. In this case, the charging ECU 10 separately starts predetermined in-vehicle devices such as the battery ECU 8 according to the start request from the external charging device 50. In addition, during the period when the power supply connector 51 is connected to the charging inlet 5 (AC socket) of the electric vehicle 1 and a start request is sent from the external charging device 50, each time Figure 4 the routine is executed, the count Ct is incremented. Therefore, the count C corresponds to the operating time of the above-mentioned predetermined in-vehicle devices during the period when the charging of the storage battery 2 has stopped and the power supply connector 51 is connected to the charging inlet 5, that is, the time when power is supplied from the auxiliary battery 4.

[0046] On the other hand, when the count C is equal to or greater than the threshold Ctref (Yes in S180B), the charging ECU 10 sets the start inhibition flag Fp stored in the backup RAM 10b to "1" (S190) in order to inhibit the start of the above-mentioned predetermined in-vehicle devices corresponding to the start request from the external charging device 50, and ends Figure 4routine. When the start prohibition flag Fp is set to "1" at S190, thereafter, even if a start request is sent from the external charging device 50, the predetermined in-vehicle devices such as the battery ECU 8 will not be started, and the electric vehicle 1 maintains the sleep state. In addition, when the charging ECU 10 determines that the power supply connector 51 is not connected to the charging inlet 5 (No in S110), in order to allow the start of the above-mentioned predetermined in-vehicle devices corresponding to the start request from the external charging device 50, the start prohibition flag Fp is set to "0" (S195). Moreover, the charging ECU 10 resets the above count Ct to zero (S200B) and once ends Figure 4 routine.

[0047] Similar to the case of executing the Figure 2 routine, the above-mentioned Figure 4 routine is executed in the electric vehicle 1, and it is also possible to satisfactorily suppress the occurrence of an abnormal situation in the electric vehicle 1 due to the start request from the external charging device 50 during the period when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5. In addition, the count Ct corresponds to the operating time of the predetermined in-vehicle devices (such as the battery ECU 8) during the period when the charging of the battery 2 stops and the power supply connector 51 is connected to the charging inlet 5. Therefore, by incrementing the count C to count the operating time of the predetermined in-vehicle devices, it is possible to accurately grasp the power consumption of the predetermined devices during the period when the charging of the battery 2 stops and the power supply connector 51 is connected to the charging inlet 5. As a result, if the start of the predetermined in-vehicle devices corresponding to the start request from the external charging device 50 is prohibited when the count Ct becomes equal to or greater than the preset threshold Ctref (Yes in S180, S190), it is possible to extremely satisfactorily suppress the reduction of the remaining capacity of the auxiliary battery 4.

[0048] Figure 5 is a flowchart showing another routine that can be repeatedly executed by the above-mentioned charging ECU 10 at predetermined intervals (tiny time) during the period when the power supply connector 51 of the external charging device 50 is connected to the charging inlet 5 (AC socket) of the electric vehicle 1.

[0049] When Figure 5 the execution timing of the routine arrives, the charging ECU 10 executes the processes of S100 to S130. When no start request is sent from the external charging device 50 (No in S140), the subsequent processes are skipped and Figure 5The routine has ended once. Additionally, when a start request is sent from the external charging device 50 (Yes in S140), the charging ECU 10 determines whether the charging of the battery 2 has stopped (S150). When the charging of the battery 2 is in progress (No in S150), the charging ECU 10 resets the discharge power amount D of the auxiliary battery 4 stored in the backup RAM 10b to zero (S200C) and ends the routine once. Figure 5 The routine.

[0050] On the other hand, when the charging of the battery 2 has stopped (Yes in S150), the charging ECU 10 calculates the discharge power amount D of the auxiliary battery 4 and stores the calculated value of the discharge power amount D in the backup RAM 10b (S160C). In S160C, the charging ECU 10 calculates the discharge power amount D by integrating the product value (discharge power) of the discharge current of the auxiliary battery 4 detected by a current sensor (not shown) and the voltage of the auxiliary battery 4 detected by a voltage sensor (not shown). Then, the charging ECU 10 determines whether the discharge power amount D is equal to or greater than a preset threshold Dref (S180C). When the discharge power amount D is less than the threshold Dref (No in S180C), the charging ECU 10 ends the routine at that time point. Figure 5 In this case, the charging ECU 10 separately starts predetermined in - vehicle devices such as the battery ECU 8 according to the start request from the external charging device 50.

[0051] On the other hand, when the discharge power amount D is equal to or greater than the threshold Dref (Yes in S180C), the charging ECU 10 sets the start - inhibition flag Fp to "1" (S190) in order to prohibit the start of the above - mentioned predetermined in - vehicle devices corresponding to the start request from the external charging device 50, and ends the routine once. Figure 5 When the start - inhibition flag Fp is set to "1" in S190, thereafter, even if a start request is sent from the external charging device 50, the battery ECU 8 and other predetermined in - vehicle devices will not be started. The electric vehicle 1 maintains the sleep state. Additionally, when the charging ECU 10 determines that the power supply connector 51 is not connected to the charging port 5 (No in S110), in order to allow the start of the above - mentioned predetermined in - vehicle devices corresponding to the start request from the external charging device 50, the charging ECU 10 sets the start - inhibition flag Fp to "0" (S195). Moreover, the charging ECU 10 resets the above - mentioned discharge power amount D to zero (S200C) and ends the routine once. Figure 5 The routine.

[0052] Similar to the case of executing Figure 2 or Figure 4 the routine, the above - described operations are executed in the electric vehicle 1.Figure 5 During the routine where the supply connector 51 of the external charging device 50 is connected to the charging inlet 5, it is also possible to satisfactorily suppress an abnormal situation from occurring in the electric vehicle 1 due to a start request from the external charging device 50. That is, by comparing the discharge power amount D of the auxiliary battery 4 during the period when the charging of the storage battery 2 is stopped and the supply connector 51 is connected to the charging inlet 5 with the threshold value Dref, it is possible to extremely satisfactorily suppress a decrease in the remaining capacity of the auxiliary battery 4.

[0053] In addition, the above-described external charging device 50 is an external charging device including an AC charger, but is not limited thereto. For example, it may be a quick charging pile or the like including a DC charger or the like connected to the supply connector via a charging cable. In addition, the charging inlet 5 of the electric vehicle 1 may also include a DC socket (not shown) connected to the positive power line PL and the negative power line NL via a relay. Regarding the charging inlet 5 of the electric vehicle 1, it is also possible to connect (insert) the supply connector of a DC-type external charging device to this DC socket.

[0054] In addition, the invention of the present disclosure is not limited to the above-described embodiments, and various modifications can of course be made within the scope of the extension of the present disclosure. Moreover, the above-described embodiments are merely a specific mode of the invention described in the invention content item and do not limit the elements of the invention described in the invention content item.

[0055] The invention of the present disclosure can be used in the manufacturing industry of electric vehicles and the like.

Claims

1. An electric vehicle comprising a storage battery and an inlet to which a power supply connector of an external charging device is connected, wherein the storage battery can be charged by power supplied from the external charging device to the inlet via the power supply connector, and the electric vehicle comprises: a predetermined vehicle-mounted device that uses the auxiliary battery as a power source and is used to charge the auxiliary battery; and A control device starts the predetermined vehicle-mounted device in accordance with a start request periodically sent from the external charging device while the power supply connector is connected to the inlet, and stops the predetermined vehicle-mounted device in accordance with stopping the sending of the start request, and prohibits starting the predetermined vehicle-mounted device corresponding to the start request when a physical quantity representing power consumption of the predetermined vehicle-mounted device becomes above a predetermined threshold value during a period when charging of the battery is stopped and the power supply connector is connected to the inlet.

2. The electric vehicle according to claim 1, The physical quantity is the number of activations of the predetermined in-vehicle device during a period in which charging of the battery is stopped and the power supply connector is connected to the inlet.

3. The electric vehicle according to claim 1, The physical quantity is an operating time of the predetermined in-vehicle device during a period in which charging of the battery is stopped and the power supply connector is connected to the inlet.

4. The electric vehicle according to claim 1, The physical quantity is the amount of electric power discharged from the auxiliary battery while charging of the battery is stopped and the power supply connector is connected to the inlet.

5. The electric vehicle according to any one of claims 1 to 4, The control device releases the prohibition of activation of the predetermined in-vehicle device corresponding to the activation request and resets the physical quantity to zero when the power supply connector is removed from the inlet.

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