JP2014064457A - External feeder device and electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external feeder device and an electric vehicle which are suitable for outdoor use.SOLUTION: An external feeder device 1 includes: an external feeder terminal part 14 having a plurality of terminals containing a terminal designed to be used for a long time; a DC-AC inverter 12 and a breaking apparatus 13 for supplying power of a high voltage battery 2 to a terminal box 14; and a controller 11 for controlling them. The controller 11 of the external feeder device 1 includes: a use lower limit SOC setting part for setting a use lower limit SOC of a high voltage battery 2 by calculating a power consumption that an electric device U1 for a long time use consumes in the use time on the basis of the power consumption and the use time of the long time use electric power device U1; and a power supply control part for controlling the residual amount of the high voltage battery 2 on the basis of the comparison result between the actual SOC and the use lower limit SOC of the high voltage battery 2.

Description

  The present invention relates to a technique related to external power feeding of an electric vehicle provided with a motor for traveling, and more specifically, relates to an external power feeding device that prevents overdischarge from a storage battery, and an electric vehicle.

  In recent years, an electric vehicle (electric vehicle) provided with a motor for traveling has attracted attention. The electric vehicle is provided with a storage battery that stores electric power supplied to the motor. In addition to the main use of supplying power to the motor, various uses are considered for this storage battery.

  For example, Patent Document 1 states that “both power supply from a household power source of a house to an electric vehicle and, conversely, electric power supply from the electric vehicle to the house side can be realized and leveling of power demand can be realized. "A power management system using an electric vehicle that secures predetermined power on the electric vehicle side at low cost and can cope with a sudden outing" is described. Patent Document 2 discloses that “a power supply system for a building that can continuously supply power from a power supply device even when the supply of commercial power is stopped in a disaster or the like (power failure state)”. Is described.

JP 2001-8380 A (paragraph 0005) JP 2007-236023 A (paragraph 0005)

  However, both documents assume power feeding from an electric vehicle to the home, and are not assumed for outdoor use such as camping, barbecue, and cherry-blossom viewing.

  In view of the above, an object of the present invention is to provide an external power supply apparatus suitable for outdoor use.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive research, and some of the external electric devices that receive power from the storage battery of the electric vehicle are used for a long time. Focusing on the fact that the above problem is solved by controlling power feeding separately from other external electric devices, the present invention has been completed.

  That is, the invention according to claim 1 that solves the above problem is mounted on an electric vehicle that drives a traveling motor with electric power stored in a storage battery, and is used for a long time as a power supply to an electric device used outdoors. An external power supply terminal portion having a plurality of terminals including at least one long-time use terminal that is scheduled to be used, an external power supply circuit that supplies the power of the storage battery to the external power supply terminal portion, and a circuit for external power supply An external device that sets a lower limit capacity of use of the storage battery based on power consumption and usage time of a long-time electrical device connected to the long-time terminal. It is a power feeding device. In this external power supply device, the control device consumes the long-term electric equipment until the use time elapses, regardless of whether or not power is taken out from the long-time terminal. It has a use lower limit capacity setting part which lowers at a certain slope corresponding to electric power.

  A second aspect of the invention that solves the above problem is an electric vehicle, wherein the external power feeding device according to the first aspect is mounted.

  ADVANTAGE OF THE INVENTION According to this invention, the external electric power feeder suitable for the use by the outdoors etc. can be provided.

It is a figure explaining the whole structure of 1st Embodiment which concerns on this invention. It is a block diagram which shows the function etc. of the control apparatus of 1st Embodiment. It is a figure which shows the example of the electric equipment information for long hours of 1st Embodiment. It is a main flowchart which shows the whole control of the control apparatus of 1st Embodiment. FIG. 2 is a diagram illustrating an example of a screen displayed on the display device as well as an example of the input device and the display device of FIG. 1. FIG. 5 is a detailed flowchart showing a lower limit SOC setting process in the main flowchart of FIG. 4. It is a figure which shows relationships, such as minimum SOC and use minimum SOC, (a) shows the time of a start, (b) shows the time of 2 hours, respectively. FIG. 5 is a detailed flowchart showing a minimum SOC calculation process in the main flowchart of FIG. 4 as a second embodiment according to the present invention. It is a map which shows the relationship between external temperature and estimated air-conditioner power consumption. This is a map showing the relationship between the battery life and the expected battery deterioration (voltage drop value). It is a map which shows the relationship between a weight and a power consumption fall value. It is a map which shows the relationship between the temperature of a battery, and a battery voltage reduction coefficient.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a mode for carrying out an external power supply apparatus and the like according to the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
First, an embodiment of an external power supply device (electric vehicle, external power supply method) suitable for outdoor activities (outdoor activities) such as leisure and camping will be described.

(overall structure)
FIG. 1 is a diagram illustrating the overall configuration of the first embodiment. First, the configuration of the electric vehicle V will be described. As shown in FIG. 1, an electric vehicle V on which an external power feeding device 1 is mounted generally includes a high voltage battery 2, a PDU (Power Drive Unit) 3, a travel motor 4, a navigation device 5 (second embodiment), and the like. Electric car. Since the electric vehicle V of the present embodiment has a general configuration except that the external power feeding device 1 is mounted, detailed description thereof is omitted. The electric vehicle V includes a vehicle equipped with the high voltage battery 2 such as a plug-in hybrid vehicle and a fuel cell vehicle in addition to the electric vehicle. Incidentally, in this example, the external power feeding device 1 is mounted (built in) an electric vehicle.

  An external power supply device 1 shown in FIG. 1 is configured as a device that supplies electric power stored in a high-voltage battery 2 of an electric vehicle V to electric devices U (U1, U2, U2) outside the vehicle. For this reason, the external power supply device 1 shown in FIG. 1 includes a control device 11, a DC-AC inverter 12, a shut-off device 13, a terminal box 14, an input device 15, a display device 16, a speaker 17, and the like.

Among these, the control device 11 is a device having a function of performing overall control of each device included in the external power supply device 1 and a function of executing control of a flowchart such as FIG. 4 to be described later. The DC-AC inverter 12 is a device having a function of inputting DC power stored in the high-voltage battery 2, converting it to 100 V single-phase AC power, and outputting it. The interrupting device 13 is a so-called breaker, and has a function of immediately shutting off the power supply to the secondary side by opening the electric circuit against an overload or a short circuit that has occurred on the secondary side (the side of the electrical equipment U or the like). It is a device having.
The terminal box 14 includes three sockets into which plugs included in the electric device U are inserted. The input device 15 is a device having a function of inputting a user instruction to the control device 11. The display device 16 is a device having a function of visually showing a control result of the control device 11 to the user.
By the way, in the present embodiment, it is assumed that, among the sockets (terminals) provided in the three terminal boxes 14, the left end socket is a long time socket that is expected to be used for a long time.

  The navigation device (navigation device) 5 receives radio waves from three or more GPS satellites S (see FIG. 2) to thereby determine the position (latitude and latitude) of itself (the electric vehicle V on which the navigation device 5 is mounted) on the earth. (Longitude / altitude) is a device that has a function of calculating a route to the nearest charging station, as will be described later.

  In the example of FIG. 1, the electrical device U is shown with one electrical device U1 for a long time and two other electrical devices U2. An example of the long-time electric equipment U1 is shown in FIG. In addition, all are apparatuses which operate | move with the single-phase alternating current power of 100V. In the present embodiment, the long-time electric device U1 is inserted into the socket of the terminal box 14 for a long time. On the other hand, the other electrical equipment U2 is used while being properly inserted and removed from the socket.

(Control device)
FIG. 2 is a block diagram illustrating functions of the control device 11. The control device 11 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), various input / output interfaces, a power supply circuit, and the like as hardware configurations (all are not shown). As shown in FIG. 2, the control device 11 includes an input / output control unit 11a, a use lower limit SOC setting unit 11b, a minimum SOC setting unit 11c, a power supply control unit 11d, and a storage unit 11e. In these blocks (each unit), a corresponding program or data is read from a storage device such as a hard disk or a flash device onto a RAM, and is executed and used by the CPU.

  Among these, the input / output control unit 11a includes the battery ECU 2a and the navigation system in addition to the function of performing control related to transmission and reception of signals and data with the DC-AC inverter 12, the cutoff device 13, the input device 15, the display device 16, the speaker 17, and the like. It has a function of performing control related to transmission and reception of signals and data with the device 5. The input / output control unit 11a has a function of performing control (user interface control) related to a user interface with a user via the input device 15 and the display device 16. The specific function of the input / output control unit 11a will be described in detail in the operation description to be described later.

  Further, the use lower limit SOC setting unit 11b has a function of setting a use lower limit value (use lower limit SOC) for determining whether or not to notify the user of a decrease in the SOC of the high voltage battery 2. Here, the use lower limit SOC (use lower limit capacity) is determined by the power consumption (W) of the electric appliance U1 for a long time and the expected use time (h), but takes a value higher than the minimum SOC (minimum capacity) described later. . In addition, the specific function of this use lower limit SOC setting part 11b is also demonstrated in detail in operation | movement description mentioned later. Incidentally, the lower limit SOC setting unit 11b is used regardless of whether or not power is taken out from a terminal for a long time (a terminal to which a long-time use electric device U1 is connected). Regardless of whether power is actually consumed or not, the use lower limit SOC is lowered with a certain slope corresponding to the power consumption of the power equipment used for a long time.

  The minimum SOC setting unit 11c has a function of setting a minimum SOC that is a determination value for prohibiting extraction (discharge) of a current from the high-voltage battery 2. The minimum SOC may be set automatically by cooperative control with the navigation device 5 or may be set manually by the user's intention. The specific function of the minimum SOC setting unit 11c will also be described in detail in the operation description to be described later.

  The power supply control unit 11d compares the SOC of the high-voltage battery 2 acquired from the battery ECU 2a (hereinafter referred to as “actually measured SOC”) with the above-described minimum SOC, and when the actually measured SOC is equal to or less than the minimum SOC (hereinafter referred to as “underlying SOC”) At the point of time), it has a function of controlling the shutoff device 13 to stop external power feeding. In addition, the power supply control unit 11d compares the measured SOC with the lower limit SOC and, when the measured SOC becomes equal to or lower than the lower limit SOC (when it becomes below), controls the speaker 17 to the user. It has a function of notifying a predetermined message. The specific function of the power supply control unit 11d will also be described in detail in the operation description to be described later.

  Necessary for setting various kinds of information, data and programs, as well as power consumption information 11e1 based on the past travel history of the electric vehicle V, which is necessary for setting the minimum SOC, and a use lower limit SOC, in the storage unit 11e. The long-time electrical device information 11e3, message data 11e3, maps 11e4 (second embodiment), and the like relating to the power consumption of the electrical device are stored.

FIG. 3 is a diagram illustrating an example of a table of the long-time electrical equipment information 11e2. As shown in FIG. 3, the long-time electric device information 11e2 stores the type of electric device, the name of the electric device, and the power consumption. An example of the long-time electric device U1 is an infrared heater shown in the table of FIG. Incidentally, the socket of the terminal box 14 of the external power supply apparatus 1 is inserted not only with the electric appliance U1 for a long time but also with the outlet for the electric appliance U2 for a short time.
Examples of the short-time electric device U2 include an IH heater (about 1800 W), a hot plate (1300 W), a rice cooker 1.2 kW, an electric drill (500 W), a vacuum cleaner (500 W). Whether it is for a long time or not can be set as a boundary, for example, whether to use continuously for 2 hours or more.

(High voltage battery)
The high voltage battery 2 mounted on the electric vehicle V will be described. The high voltage battery 2 is, for example, an assembled battery in which a plurality of rectangular lithium ion secondary batteries (single cells) are connected in series (appropriately in parallel) and housed in a battery box (not shown). One hundred V. The energy capacity (Wh) of the high voltage battery 2 is assumed to be several tens of kWh as in the case of a commercially available electric vehicle.

  In the present embodiment, the terms “discharge capacity”, “energy capacity”, and “SOC” are used for the high-voltage battery 2 (battery), and the terms “power consumption” and “power consumption” are used for the electric equipment U. Will be described.

First, for the high-voltage battery 2, the “discharge capacity” is the amount of electricity that can be taken out from the battery (high-voltage battery 2) before reaching the voltage (discharge end voltage) until the battery can no longer be discharged from the fully charged state. The unit is Ah (ampere hour). From a battery having a discharge capacity of 500 Ah, a current of 100 A can be taken out for 5 hours. The “energy capacity” indicates the amount of power stored in the battery, and the unit is Wh (watt hour). From a battery having an energy capacity of 30000 Wh (= 30 kWh), 30 kW of power can be extracted for 1 hour. In summary, the discharge capacity and the energy capacity have the following relationship.
・ Discharge capacity (Ah) = specified discharge current (A) × continuous discharge time (h) until the discharge end voltage
・ Energy capacity (Wh) = discharge capacity (Ah) × average voltage (V) up to the discharge end voltage

  “SOC” is an index indicating the remaining amount of the battery in%. Here, SOC = 100% when fully charged, and the amount of power (Wh) corresponding to the energy capacity (Wh) of the battery from the fully charged state. ) Is set to SOC = 0%. However, in order to maintain the soundness of the battery, the battery is not normally discharged to the discharge end voltage (until the SOC becomes 0%).

  Next, regarding the electric equipment U, its “power consumption” is indicated by W, and “power consumption” is indicated by Wh. That is, the amount of power consumed when the electric device U with power consumption of 1000 W is used for 1 hour is 1000 Wh, and the amount of power consumed when used for 5 hours is 5000 Wh. For example, when a battery (high voltage battery 2) having an energy capacity of 30 kWh and an electric device U having a power consumption of 1000 W (that is, 1 kW) are connected and the electric device U is used for 3 hours, the power consumption of the electric device U Will be 3kWh. The amount of power consumption of 3 kWh corresponds to the amount by which the SOC value is reduced by 10 so that the SOC of a battery with an energy capacity of 30 kWh is increased from 70% to 60%, for example.

(Operation of the first embodiment)
Next, with reference to FIGS. 4-7, operation | movement of the external electric power feeder 1 of 1st Embodiment is demonstrated. FIG. 4 is a main flowchart showing the overall control of the control device. As an assumption of the operation, the electric vehicle V is loaded with outdoor equipment and heads for a campground by the user's driving, and the electric device U is supplied with power there.

  First, the user unloads the electric device U from the electric vehicle V and prepares for camping. Incidentally, it is assumed that the electric device U1 for a long time among the electric devices U is an electric heater. The user opens a lid (lid) (not shown) that closes the terminal box 14 of the electric vehicle V and prepares for power supply to the electric device U. In addition, the user turns on the external power supply device 1 by operating an operation switch (not shown). Thereby, the process by the main flowchart of FIG. 4 is started.

  In step S2 of FIG. 4, it is determined whether or not the desired SOC is input by the user. The desired SOC is the SOC value that the user wants to secure in the high voltage battery 2 as a user. When the desired SOC is input via the input device 15 (S2 → Yes), the input desired SOC is set as the lowest SOC (S6). On the other hand, when the lowest SOC is not input (S2 → No), the lowest SOC setting unit 11c calculates the lowest SOC (S4). The method of calculating the minimum SOC will be described in detail later (in the second embodiment) with reference to FIGS.

When the minimum SOC is calculated, the value is set as it is as the minimum SOC (S6). The minimum SOC is a reference value for determining whether or not to continue external power supply, such as when external power supply is stopped when the SOC falls below that value (see S26 described later). That is, the minimum SOC is to set the SOC (amount of electric power (kWh) or energy capacity (kWh)) that is desired to be secured in the high voltage battery 2 of the electric vehicle V. Note that the minimum SOC calculated in step S4 is a value of SOC that can travel to the nearest charging station, as will be described later. On the other hand, the minimum SOC based on the desired SOC input by the user is variously set depending on the user's intention.
Incidentally, it is assumed that the minimum SOC cannot be a value higher than the actual SOC. If the input value of the desired SOC by the user is a value higher than the actual SOC, the control device 11 displays on the display device 16. It is assumed that the user is prompted to re-enter the desired SOC (that is, the lowest SOC) via the screen.

  When the minimum SOC is set (S6), in the present embodiment, the power supply control unit 11d turns on the cutoff device 13 to enable external power supply to start (S8). At this time, if the plug of the electric device U is inserted into the socket of the terminal box 14 and a switch (not shown) of the electric device U is turned on, the external power supply device 1 operates the DC-AC inverter 12 to generate AC 100V. Power supply of single-phase AC power is started.

  In step S10, it is determined whether or not the plug of the electric device U is inserted into the long time socket. This determination can be performed by providing a microswitch or the like in the long time socket. If it is not inserted (S10 → No), it is possible that power is supplied from a socket other than the socket for a long time, and therefore it is determined whether or not the measured SOC is equal to or lower than the minimum SOC (S12). . As described above, the minimum SOC is an SOC value indicating the amount of power that the high voltage battery 2 is desired to secure. When the measured SOC is equal to or lower than the minimum SOC (S12 → Yes), the external power supply is stopped in step S26. That is, the power supply control unit 11d turns off the interruption device 13 and stops further power supply from the high voltage battery 2 (S26). On the other hand, if step S12 is No, the shutoff device 13 is not turned off but is kept on. Thereby, when external electric power feeding is performed, electric power feeding is continued as it is.

  When the insertion into the socket for a long time is detected in step S10 (S10 → Yes), the input / output control unit 11a displays the input screen shown in FIG. 5 on the display device 16 and prompts the user via the input device 15 The type of electric appliance U1 and its power consumption are input (S14). In FIG. 5, “infrared heater 1000 W” is displayed as the type, but this content is registered in the long-time electrical equipment information 11 e 2 of FIG. 3 by the pull-down menu. The information is sequentially displayed and can be selected by the user. This also applies to the end date and time. On the screen of FIG. 5, the end date is “June 25, 2010” and the end time is “1:00”. That is, the user plans to use the infrared heater for 7 hours continuously from 18:00 on June 24 to 1 o'clock (25:00) 00 on the next day. When the input is not completed (S16 → No), the process waits for the input. When the input is completed (S16 → Yes), the process proceeds to step S18.

  Step S18 is a step of setting the use lower limit SOC. In other words, this is to virtually secure the amount of power (kWh) for continuous use for 7 hours of the electric appliance U1 for a long time. In setting the lower limit SOC, the type (power consumption) and the use end time (continuous use time) input in steps S14 and S16 are used, and the value is set toward the use end time of the electric device U1 for a long time. It is set to be small (count down).

  That is, as shown in the flowchart of FIG. 6, in the “use lower limit SOC setting”, first, the power consumption of the electric device U1 to be used is calculated (S12A). In this example, the calculation of the power consumption is performed by directly using the power consumption of the electric device U1 input in step S16. For example, if the input screen of FIG. 5 is 1000 W, 1000 W is calculated as the power consumption value as it is in step S12A. Next, the continuous use time of the electric device U1 for a long time is calculated (S12B). The continuous use time is the current time minus the end time, and becomes a small value every moment. When the current time becomes the end time, the value becomes zero. That is, the continuous use time is the remaining time until the set end time.

  Subsequent to step S12B, an expected power consumption amount of the electric appliance U1 for a long time is calculated (step S12C). Here, by multiplying the power consumption (W) in step S12A by the continuous use time (remaining time) in step S12B, how much power (kWh) the electric device U1 has in the remaining time until the end time is reached. ) Is calculated (expected). Subsequently, the predicted power consumption calculated in step S12C is converted into SOC (S12D). The conversion method is as described above. For example, if the predicted power consumption is 3 kWh for the high voltage battery 2 having an energy capacity of 30 kWh, the converted SOC value is 10%. Of course, this value also decreases as time passes.

Finally, the use lower limit SOC is calculated and set (S12E). The use lower limit SOC is calculated by adding the SOC converted in step S12E to the lowest SOC set in step S6, and the calculated value is set as the use lower limit SOC. Α is a value set as appropriate and takes a value larger than 0, but is assumed to be 0 here.
When step S12E ends, the control device 11 returns the process to the main flowchart of FIG. 4 which is the main routine.

  After the use lower limit SOC is set in the flowchart of FIG. 6, it is determined whether or not the actually measured SOC acquired from the battery ECU 2a is equal to or lower than the use lower limit SOC (S20). This is to determine whether or not SOC (power amount) virtually secured in the long-time electric device U1 has been consumed (discharged) from the high-voltage battery 2.

  When the actually measured SOC is not less than or equal to the use lower limit SOC (S20 → No), the use lower limit SOC is set again (S18). Incidentally, in step S18, it does not matter whether or not the long-time electric device U1 actually consumes power (regardless of whether or not power is taken out from the long-time terminal). That is, when the electrical device U1 is switched off, there is no power consumption during that time, but this is so-called power saving, and the saved power amount can be sent to the electrical device U2 for a short time. Even in this case, the amount of power consumed by the long-time electric device U1 is secured.

  In step S20, when the measured SOC is equal to or lower than the lower limit SOC (S20 → Yes), it is because the discharge from the high voltage battery 2 is more than planned, so this is notified to the user to call attention. (S22). The notification is given to the outdoor user by voice through the speaker 17 by the input / output control unit 11a reading the message data 11e3 or the like. Thereby, the user can suppress power consumption (discharge from the high-voltage battery 2) by turning off the switch of the electric device U that is externally fed or changing the output from strong to weak.

  Next, in step S24, it is determined whether or not the actually measured SOC is equal to or lower than the lowest SOC. When the measured SOC is equal to or lower than the minimum SOC (S24 → Yes), the power supply control unit 11d turns off the shutoff device 13 and stops external power supply in order to secure the minimum SOC for the high voltage battery 2 (S26). ), The process of the main flowchart ends.

  On the other hand, when the actually measured SOC is not equal to or lower than the minimum SOC (S24 → No), the process returns to step S18 to set the use lower limit SOC again. As described above, the lower limit SOC is used for a long time toward the end time regardless of whether or not the electric device U connected to the external power supply apparatus 1 actually consumes or consumes electric power. Is calculated and set so as to be reduced each time by the amount of power consumed. Here, even if the actually measured SOC becomes equal to or lower than the use lower limit SOC in step S20 (S20 → Yes), if the user switches off the electric device U or reduces the output by the notification in step S22, power is saved. In other words, if the power consumption amount (kWh) corresponding to the actual power saving is larger than the power consumption amount (kWh) set for the long-time power device U1, the amount taken out from the high voltage battery 2 should be small. Step S20 of this time becomes No (actually measured SOC> use lower limit SOC).

  Supplementally, even if step S20 becomes Yes at 23:00, 2 hours before 25:00 of the end time (actually measured SOC ≦ use lower limit SOC), the actually measured SOC at that time is below the minimum SOC. If it is not (that is, if S24 → No), the user can switch off the electric device U by his / her own intention or reduce the output to newly calculate and set the lower limit of use SOC. In the next S20 in which the measured SOC is compared, it is possible to set the measured SOC> the lower limit SOC (that is, S20 → No).

Incidentally, in the situation where the actual measured SOC at the start of external power supply exceeds the lower limit SOC (actually measured SOC> lower limit SOC), when power is supplied only to the electric device U1 for a long time, step S20 is Yes (actually measured). SOC ≦ use limit SOC), that is, it can be said that Step S20 is Yes and the notification of Step S22 is not performed.
Step S22 means that “the remaining capacity of the storage battery is compared with the lower limit capacity for use, and the control relating to the remaining capacity of the storage battery is performed based on the result”.

  Next, with reference to FIG. 7, supplementary explanation will be given on the minimum SOC, the lower limit SOC, and the like. FIG. 7 is a diagram showing the relationship between the lowest SOC and the lower limit of use SOC, where (a) shows the start time and (b) shows the time when 2 hours have elapsed.

  As shown in FIG. 7A, at the time of 18:00 when external power feeding is started, the actually measured SOC of the electric vehicle V is 80% (assumed to exist). Further, it is assumed that the minimum SOC is set to 30%. Regarding the lower limit of use SOC, in this embodiment, since a 1000 W infrared heater is used for 7 hours (until 25 o'clock), the expected power consumption is 7000 Wh (= 7 Kwh), which is about 23% when converted to SOC. That is, the use lower limit SOC is 53% (α = 0). Then, the user can freely supply power corresponding to 27% SOC to the short-time electric device U2 (hot plate or the like) other than the long-time electric device U1 (free use). ). As described above, it is assumed that the energy capacity of the high voltage battery 2 of the present embodiment is 30 kWh. In addition, “actually measured SOC” indicated by the upper horizontal bar in FIG. 7 is literally an actual measured value, but “minimum SOC” indicated by the lower horizontal bar, “SOC converted from expected power consumption”, “use lower limit SOC” "And" Free use "are calculated values (expected values).

  In FIG. 7B when 2 hours have elapsed, the actually measured SOC is 62% (assumed to exist). That is, during 2 hours, the amount of power corresponding to 18% (= 80% −62%) of SOC was discharged from the high voltage battery 2. Since the electric appliance U1 for a long time is used for another 5 hours, the expected power consumption is 5 kWh. When this is converted into SOC, it is 17%. That is, the use lower limit SOC is 47%.

In other words, the electric appliance U1 for a long time consumes 2 kWh of power for 2 hours, but this value is 6 to 7% when converted to SOC. Incidentally, even if the switch of the electric device U1 for a long time is turned off halfway, the power consumption is 2 kWh. On the other hand, the SOC for free use is calculated as 15%. If the electric device U1 for a long time is used without being switched off and the output is not weakened, the electric device U2 that is not for a long time (such as a hot plate or a rice cooker) The power corresponding to the SOC of% (= 27% -15%) is supplied. That is, a hot plate, a rice cooker, etc. consumed 3.6 kWh of electric power for 2 hours.
Note that the short-time electric device U2 other than the long-time electric device U1 is used while the socket of the terminal box 14 is removed and replaced as appropriate.

(Effects of the first embodiment)
According to the first embodiment described above, the electric appliance U1 for a long time can be continuously used until the set end time by setting the use lower limit SOC. Further, with the “minimum SOC setting”, for example, the amount of electric power that travels to the nearest charging station or home can be secured in the high voltage battery 2. That is, overdischarge from the high voltage battery 2 can be prevented. Thereby, it can be set as the external electric power feeder 1 suitable for the use by the outdoors.

<< Second Embodiment >>
Next, a specific example of “minimum SOC setting” in the first embodiment will be described with reference to FIGS.

  In step S4 of the main flowchart of FIG. 4, the control of the flowchart shown in FIG. 8 is executed. First, in step S4A of FIG. 8, it is determined whether or not the minimum SOC setting unit 11c performs automatic setting. In this determination, depending on whether or not the electric vehicle V is equipped with the navigation device 5, it is determined that automatic setting is performed when it is mounted (S4A → Yes), and automatic setting is not performed when it is not mounted. (S4A → No). Whether or not the electric vehicle V is equipped with the navigation device 5 is grasped because the existence of the counterpart device is mutually confirmed by CAN (Controller Area Network) communication at the time of IGON or the like. Shall.

  In S4A, when automatic setting is not performed (S4A → No), the process proceeds to step S4H. On the other hand, in the case of automatic setting (S4A → Yes), the distance (RangM) to the nearest charging station is calculated (S4B). In this case, the lowest SOC setting unit 11c makes a distance calculation request to the navigation device 5, and the navigation device 5 detects the current position and searches for a route, and calculates the distance (RangM) to the nearest charging station. And Next, an expected energy balance (IncW) due to an altitude difference to the nearest charging station is calculated (S4C). It is assumed that the minimum SOC setting unit 11c requests the navigation device 5 to obtain an elevation difference and calculates the expected energy balance from the elevation difference obtained from the navigation device 5. In addition, the energy balance worsens as there is an elevation difference.

  Next, with reference to the map of FIG. 9, the predicted air-conditioner power consumption (AccW) is calculated from the outside air temperature (S4D). This is calculated using an outside air temperature acquired from an outside air temperature sensor (not shown) and the map shown in FIG. Incidentally, since the cooling load is applied when the outside air temperature is high, and the heating load is applied when the outside air temperature is low, the load of the air conditioner increases. In addition, since the electric vehicle V does not have a large heat source (engine) like an old vehicle equipped with an engine, the electric power of the high voltage battery 2 is used as it is for heating.

  Next, with reference to the map of FIG. 10, the voltage drop value (DownV) is calculated from the years of use of the high voltage battery 2 (S4E). Note that the years of use can be acquired from the battery ECU 2a.

  Next, with reference to the map of FIG. 11, the electricity cost drop value (DwonW) by weight is calculated from the number of passengers of the electric vehicle V (S4F). The number of occupants can be calculated by acquiring this value if the electric vehicle V includes a suspension stroke sensor.

  Next, referring to FIG. 12, the battery voltage drop coefficient (kt) is calculated from the current temperature of the high voltage battery 2 (S4G). The temperature of the high voltage battery 2 can also be acquired from the battery ECU 2a. The service life and temperature of the high voltage battery 2 are important management items for the battery ECU 2a.

  In step S4H, the average power consumption (AveW) is acquired by reading the power consumption information 11e1 in the storage unit 11e.

In step S4I, it is determined whether automatic setting is in progress. If automatic setting is not in progress (S4I → No), the user can be notified of the travelable distance from the average power consumption acquired in step S4H and the current measured SOC (remaining battery) via the display device 16, and the minimum SOC Is prompted (S4K). Note that the travelable distance here is a value before external power feeding.
Incidentally, the desired SOC in step S2 is input regardless of the remaining travel distance.

  On the other hand, when automatic setting is being performed (S4I → Yes), the lowest SOC is calculated from each parameter by a predetermined calculation formula (S4J). This minimum SOC is used as a value for ensuring in the high voltage battery 2 the amount of power that can be traveled to the nearest charging station.

  According to the second embodiment described above, the coordinated control with the navigation device 5 can ensure the amount of power to the nearest charging station in the high-voltage battery 2 and can perform external power feeding. The external power supply device 1 can be more suitable for the application.

≪Others≫
The embodiment described above is an example, and can be widely modified. For example, a solar cell panel may be attached to the roof of the electric vehicle V and external power feeding may be performed.
Further, it may be possible to automatically determine what is the electrical device U inserted into the socket and how much power is consumed by using a technology such as an IC tag or power line conveyance.
In this case, if the control device 11 knows that the electrical device U inserted into the socket is the electrical device U1 for a long time based on the information obtained from the electrical device U by IC tag or power line conveyance, it automatically The main flowchart of FIG. 4 can be started, and the input of the type (power consumption) by the user in steps S14 and S16 can be omitted.

  In addition, it is assumed that only one long-time electric device U1 is used in steps S14 and S16. However, the number is not limited to one, and it is possible to use two or three long-time electric devices U1. In this case, it is possible to set a plurality of units such as the type (power consumption) and end time for the first unit, and the type (power consumption) and end time for the second unit. In addition, a table tap can be inserted into the long-time socket to form an octopus-like wiring, and power can be supplied from one long-time socket to an infrared heater or lighting. Further, the number of sockets of the terminal box 14 is not limited to three. In addition, when the electric power consumption is different between when boiling water and when keeping warm, such as an electric thermos (see FIG. 3), the lower limit SOC can be set in consideration of this. By the way, boiling water is completed in about 15 minutes.

Moreover, although the example which sets end time was demonstrated, you may make it also set start time. By the way, if it is set to be used from 20:00 to 27:00 (3 o'clock the next day) at 18:00, the SOC corresponding to the power consumption for 7 hours and the minimum SOC from 18:00 to 20:00 Is continuously calculated as the lower limit SOC (that is, the remaining time remains 7 hours), and the remaining time is subtracted from 20:00. Then, a value obtained by adding the SOC corresponding to the subtracted remaining time and the minimum SOC is calculated every time as the use lower limit SOC.
Moreover, you may make it set only use time like use for 8 hours from now on.

Moreover, although the socket for a long time was defined, it is not necessary to determine the socket for a long time in particular. Further, the terminal box 14 can be shared with a charging socket for the high voltage battery 2.
Further, in the above-described embodiment, when the measured SOC ≦ the lower limit SOC, the user is notified of the decrease in the SOC of the high-voltage battery 2 and the user is encouraged to save power. (Or U2) may be temporarily or temporarily stopped (for example, until measured SOC> use lower limit SOC).

Further, although the navigation device 5 is separated from the external power supply device 1, the external power supply device 1 and the navigation device 5 can be integrated. Further, the input device 15 and the display device 16 can be a mobile phone or a game machine. In this case, for example, wired communication or wireless communication is used.
Moreover, although the example which incorporates the external electric power feeder 1 in the electric vehicle V was shown, it can also be attached externally. That is, the user mounts the external power supply device 1 on the electric vehicle V together with outdoor equipment such as the electric equipment U, and sets the external power supply device 1 in the charging (power supply) socket of the electric vehicle V at the destination. By doing so, the external power feeder 1 can be used. Incidentally, “mounted on an electric vehicle” in the claims is not limited to “built in (mounted on) an electric vehicle”. Further, it may be applied to household power supply in an emergency.

  INDUSTRIAL APPLICABILITY The present invention has great applicability as a technology that makes an electric vehicle that will become increasingly popular in the future convenient, particularly as a technology that makes it convenient to use in outdoor life.

V vehicle (electric vehicle)
DESCRIPTION OF SYMBOLS 1 External power feeder 11 Control apparatus 11b Use lower limit SOC setting part (use lower limit capacity setting part)
11c Minimum capacity setting part (minimum SOC setting part)
11d Power supply control unit (control unit)
12 DC-AC inverter (external power supply circuit)
13 Shut-off device (external power supply circuit)
14 Terminal box (external power supply terminal)

In response to the above problems, the present inventors have conducted intensive research and, when external power feeding is performed with a storage battery of an electric vehicle, the remaining capacity of the storage battery can be reduced based on enabling the vehicle to travel to a place where it can be charged next. Focusing on the fact that the above problem can be solved by setting , the present invention has been completed.

That is, the invention according to claim 1 that solves the above problem is mounted on an electric vehicle that drives a traveling motor with electric power stored in a storage battery, and has an external power supply having a terminal for supplying power to an electric device used outdoors. and the terminal portion, and the external power supply circuit for supplying the external power supply terminal portions of the power of the storage battery, and a control device for controlling the external power supply circuit is an external power supply device Ru comprising a.
The control device includes a minimum SOC setting unit that sets a minimum SOC that serves as a reference value for determining whether or not discharging from the storage battery through the external power supply circuit is prohibited.
Then, the minimum SOC setting unit sets the minimum SOC so as to secure the storage battery with electric power that can travel to a rechargeable destination toward which the electric vehicle is directed after external power feeding through the external power feeding circuit. Features.

A ninth aspect of the present invention that solves the above problem is an electric vehicle, wherein the external power feeding device according to any one of the first to eighth aspects is mounted.

<< First Embodiment >>
First, an embodiment of an external power supply device (electric vehicle, external power supply method) suitable for outdoor activities (outdoor activities) such as leisure and camping will be described. Details of the “minimum SOC” setting will be mainly described in the second embodiment.

Claims (2)

It is mounted on an electric vehicle that drives a traveling motor with electric power stored in a storage battery,
As a power supply to an electric device used outdoors, an external power supply terminal portion having a plurality of terminals including at least one terminal for a long time scheduled to be used for a long time;
An external power supply circuit for supplying power of the storage battery to the external power supply terminal unit;
A control device for controlling the external power feeding circuit,
The control device is an external power supply device that sets a use lower limit capacity of the storage battery based on power consumption and use time of a long-time electric device connected to the long-time terminal,
Regardless of whether the power is taken out from the terminal for a long time, the control device sets the use lower limit capacity to a constant corresponding to the power consumption of the electric device for a long time until the use time elapses. An external power feeding device having a lower limit capacity setting unit that is lowered by inclination.   An electric vehicle comprising the external power supply device according to claim 1 mounted thereon.

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