JP2019186977A - Control device - Google Patents

Abstract

To provide a control device which can quickly raise a temperature of an accumulator without decreasing an accumulation amount of the accumulator.SOLUTION: A control device 100 comprises a temperature adjustment part 110 for raising or holding a temperature so as to make an accumulator BT reach a prescribed target temperature by receiving power between a charger 20 and itself via a cable CB in a state that an electric vehicle 10 and the charger 20 are connected to each other by the cable CB, and after the charge to the accumulator BT is finished.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a control device that controls charging of an electric vehicle.

  Electric vehicles are spreading. An electric vehicle is a vehicle that drives a rotating electrical machine with electric power stored in a storage battery and travels with the driving force of the rotating electrical machine. Examples of such an electric vehicle include an electric vehicle that travels only by the driving force of the rotating electrical machine, and a hybrid vehicle that travels by the driving force of each of the rotating electrical machine and the internal combustion engine.

  It is known that when the temperature of the storage battery is lowered, the output from the storage battery is reduced due to the increase in its internal resistance. For this reason, it is necessary to raise the temperature of the storage battery early, particularly at the start of traveling of the electric vehicle.

  In the temperature raising device described in Patent Document 1 below, a resonance circuit is configured by connecting a series circuit including an inductor, a capacitor, and an AC power source to the storage battery, and the storage battery is heated by the current generated in the resonance circuit. Yes.

Japanese Patent No. 4081855

  However, when the temperature of the storage battery is raised by the method described in Patent Document 1, a part of the power stored in the storage battery is consumed as an AC power source. For this reason, there is a problem that the storage amount of the storage battery is reduced and the cruising distance of the electric vehicle is shortened. In addition, there is a problem in that new components such as an inductor and a capacitor for configuring the resonance circuit are required. Furthermore, the size of the inductor or the like has to be reduced due to the limitation of the in-vehicle space. As a result, there is a problem that it is difficult to sufficiently increase the rate of temperature increase of the storage battery by the resonance circuit.

  An object of this indication is to provide the control apparatus which can heat up a storage battery for a short time, without reducing the electrical storage amount of a storage battery.

  The control device according to the present disclosure is a control device (100) that controls charging of the electric vehicle (10). The said electric vehicle is comprised so that the electric power supplied via a cable may be charged to a storage battery (BT) in the state connected with the charging device (20) by the cable (CB). This control device is in a state where the electric vehicle and the charging device are connected by a cable, and after charging of the storage battery is completed, power is exchanged with the charging device via the cable. Thus, a temperature adjustment unit (110) that raises or keeps the storage battery at a predetermined target temperature is provided.

  In such a control device, the storage battery is heated and kept warm by transferring power to and from the charging device via a cable. For example, if the discharge from the storage battery to the charging device and the charging from the charging device to the storage battery are repeated, thereby generating an oscillating current in the storage battery, the temperature of the storage battery is raised without reducing the storage amount of the storage battery. It becomes possible to make it. In this case, since it is not necessary to suppress the current value in consideration of a decrease in the amount of stored electricity, the storage battery can be raised to the target temperature in a relatively short time.

  According to the present disclosure, there is provided a control device that can raise the temperature of a storage battery in a short time without reducing the amount of electricity stored in the storage battery.

FIG. 1 is a diagram schematically showing an electric vehicle equipped with the control device according to the present embodiment and a charging device connected to the electric vehicle by a cable. FIG. 2 is a diagram for explaining the outline of temperature control executed by the temperature adjustment unit of the control device. FIG. 3 is a diagram for explaining communication performed between the control device for the electric vehicle and the control unit for the charging station. FIG. 4 is a flowchart showing a flow of processing executed by the control device. FIG. 5 is a flowchart showing the flow of processing executed by the control device.

  Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  The control device 100 according to the present embodiment is a device mounted on the electric vehicle 10 and is configured as a device for controlling charging of the electric vehicle 10 (that is, charging to the storage battery BT). Prior to the description of the control device 100, the configuration of the electric vehicle 10 and the charging device 20 will be described first with reference to FIG.

  The electric vehicle 10 is configured as an electric vehicle that drives a rotating electric machine (not shown) with electric power stored in the storage battery BT and travels with the driving force of the rotating electric machine. Instead of such an aspect, the electric vehicle 10 may be configured as a so-called “hybrid vehicle” that can be driven by the respective driving forces of the rotating electrical machine and the internal combustion engine.

  Charging the storage battery BT is performed in a state where the electric vehicle 10 is stopped near the charging device 20 and the electric vehicle 10 and the charging device 20 are connected by the cable CB. The electric vehicle 10 is configured to charge the storage battery BT with the electric power supplied via the cable CB while being connected to the charging device 20 by the cable CB.

  The storage battery BT is provided with a plurality of sensors (not shown) for measuring various parameters. The parameters include the temperature, voltage, output or input current, storage amount, etc. of the storage battery BT. The values of various parameters measured by the sensors are acquired by the control device 100 described later.

  The charging device 20 is a device for supplying electric power for charging to the electric vehicle 10. The charging device 20 is, for example, a power supply stand installed at a parking place of the electric vehicle 10. In addition to supplying electric power for charging to the electric vehicle 10, the charging device 20 accepts electric power discharged from the storage battery BT of the electric vehicle 10, and stores it in a storage battery (not shown) or supplies it to a nearby building. It can also be consumed. That is, power can be exchanged via the cable CB between the electric vehicle 10 and the charging device 20 in both directions.

  The charging device 20 includes a control unit 210 and a conditioner 220. The control unit 210 is a part that controls charging / discharging with the electric vehicle 10 by controlling the operation of the conditioner 220. The control unit 210 is configured as a computer system having a CPU, a ROM, a RAM, and the like. The control unit 210 controls charging / discharging with the electric vehicle 10 while communicating with the control device 100 via the cable CB.

  The conditioner 220 is a power converter for converting AC power supplied from the power system PS to the charging device 20 and outputting the converted power from the cable CB. In addition, the conditioner 220 can convert the power supplied from the electric vehicle 10 via the cable CB and store the converted power in a storage battery (not shown) or supply it to a building (not shown). . The operation of the conditioner 220 is controlled by the control unit 210. Thereby, the magnitude | size etc. of the electric power charged / discharged via the cable CB are adjusted so that it may become according to the command value from the control apparatus 100 mentioned later.

  The cable CB is used as a path for communication performed between the control device 100 and the control unit 210 in addition to being used as a path for electric power exchanged between the electric vehicle 10 and the charging device 20. The cable CB may have a configuration in which a power transmission line and a communication line are individually incorporated, or a configuration in which both are common. In the latter case, a communication signal is superimposed on the power transmitted through the power transmission line.

  The control device 100 will be described with reference to FIG. As already described, the control device 100 is configured as a device for controlling charging of the electric vehicle 10 and is mounted on the electric vehicle 10. The control device 100 transmits the command value to the control unit 210 via the cable CB, thereby controlling the value of the power charged / discharged by the storage battery BT to be the command value. Details of specific processing performed for the control will be described later.

  The control device 100 is configured as a computer system having a CPU, a ROM, a RAM, and the like. The control device 100 includes a temperature adjustment unit 110 as a functional control block. The temperature adjustment unit 110 is a part that performs a process of raising or keeping the temperature of the storage battery BT at a predetermined target temperature when the temperature of the storage battery BT is low.

  The temperature adjustment unit 110 is in a state where the electric vehicle 10 and the charging device 20 are connected by the cable CB, and after the charging to the storage battery BT is completed, the electric power via the cable with the charging device 20 Is performed to control the temperature of the storage battery BT to be raised or kept at a target temperature. Hereinafter, this control is also referred to as “temperature control”.

  An outline of the temperature control will be described with reference to FIG. What is shown in FIG. 2A is a temporal change in the temperature of the storage battery BT. FIG. 2B shows the time change of the current supplied to the storage battery BT via the cable CB, that is, the charging current. What is shown in FIG. 2C is a temporal change in the amount of electricity stored in the storage battery BT. Note that the vertical axis of FIG. 2 (C) showing the charged amount is SOC (State of Charge) and is also referred to as “charge rate”. I decided to.

  In the example of FIG. 2, the period from time t0 to time t1 is a period during which the electric vehicle 10 is traveling. While the electric vehicle 10 is traveling, a relatively small amount of heat is generated in the storage battery BT as electric power is supplied from the storage battery BT to the rotating electrical machine. Thereby, the temperature of the storage battery BT in the said period is higher than the external temperature TO, and is maintained at the substantially constant temperature (FIG. 2 (A)).

  In the period from time t0 to time t1, since the electric vehicle 10 is running, the current supplied to the storage battery BT via the cable CB is 0 (FIG. 2B). In addition, the amount of power stored in the storage battery BT during the period is gradually decreasing (FIG. 2C). In addition, while the electric vehicle 10 is traveling, the storage battery BT may be charged with regenerative power. For this reason, the storage battery BT in the said period may increase temporarily.

  The period from the time t1 to the time t2 is a period in which the electric vehicle 10 is stopped in the vicinity of the charging device 20 and charging from the charging device 20 to the electric vehicle 10 is performed. In this period, as shown in FIG. 1, the electric vehicle 10 and the charging device 20 are connected by a cable CB.

  During the period from time t1 to time t2, a relatively large amount of heat is generated in the storage battery BT as charging is performed. Thereby, the temperature of the storage battery BT in the said period is rising with progress of time (FIG. 2 (A)). In addition, the charging current in the period is maintained at a predetermined value IM (FIG. 2B).

  At this time, the amount of power stored in the storage battery BT increases with the passage of time, and reaches a predetermined target value ST at time t2 (FIG. 2C). In the present embodiment, the storage amount corresponding to 100% SOC is set as the target value ST, but the target value ST may be a value other than this. When the charged amount reaches the target value ST at time t2, charging is stopped, and the current supplied to the storage battery BT is once set to 0 (FIG. 2B).

  The process executed in the period from time t0 to time t2 described above is the same as the conventional process. In the present embodiment, the content of processing executed after time t2 is different from the conventional one.

  By the way, when the temperature of storage battery BT is falling, it is known that the output from storage battery BT will fall because the internal resistance becomes high. For this reason, it is preferable that the temperature of the storage battery BT rises to an appropriate temperature, particularly when the electric vehicle 10 starts to travel.

  However, if charging is stopped at the time t2 and the state is continued, the temperature of the storage battery BT is lowered to the outside temperature TO. In FIG. 2A, an example of the temperature change of the storage battery BT that decreases in this way is indicated by a dotted line DL1. Especially in the period when the outside air temperature TO is low, such as in winter, it takes time for the temperature of the storage battery BT to rise from the outside air temperature TO to an appropriate temperature after the start of traveling. Therefore, the electric power stored in the storage battery BT is reduced. It cannot be used effectively.

  Therefore, in the control device 100 according to the present embodiment, the temperature adjustment unit 110 performs temperature control control in a period after the time t2, thereby increasing the temperature of the storage battery BT to an appropriate temperature. This “appropriate temperature” is shown as the target temperature TT in FIG.

  The period from time t2 to time t4 is a period in which the electric vehicle 10 is stopped and the electric vehicle 10 and the charging device 20 remain connected by the cable CB. That is, it is a period in which the electric vehicle 10 is in a standby state with the charging completed.

  As shown in FIG. 2B, in the period after time t2, the value of the charging current is positive and negative. In other words, the charging from the charging device 20 to the storage battery BT and the discharging from the storage battery BT to the charging device 20 are repeated, thereby generating an oscillating current in the storage battery BT. Since such a process is performed by the temperature adjustment unit 110, the temperature of the storage battery BT continues to rise with time due to Joule heat in the period after time t2. The temperature of the storage battery BT rises to the vicinity of the target temperature TT at time t3, and is maintained at a constant temperature thereafter. The temperature adjustment unit 110 adjusts the oscillating current in the storage battery BT so that the temperature of the storage battery BT becomes the target temperature TT and is maintained. The final temperature of the storage battery BT may completely match the target temperature TT by the above temperature control, but a slight deviation may remain between the target temperature and the actual temperature. .

  In the example of FIG. 2, the temperature adjustment unit 110 raises the temperature of the storage battery BT in the period from time t2 to time t3, and keeps the storage battery BT at a constant temperature in the period after time t3. If the temperature of the storage battery BT at the time t2 has been the target temperature TT from the beginning, the temperature adjusting unit 110 performs temperature control so as to keep the storage battery BT warm from the time t2.

  The oscillating current for raising the temperature of the storage battery BT is not generated by continuing the discharge from the storage battery BT, but is a current that flows bidirectionally between the electric vehicle 10 and the charging device 20 via the cable CB. ing. For this reason, it is possible to raise the temperature of the storage battery BT or keep it warm in a short time without reducing the amount of electricity stored in the storage battery BT. As shown in FIG. 2C, the storage amount in the period from time t2 to time t4 is a relatively narrow range from a predetermined storage amount ST1 to the target value ST (for example, a range from 99% to 100%). It fluctuates periodically.

  The period after time t4 is a period in which the electric vehicle 10 is traveling again. At the time t4 when the traveling is started, the temperature of the storage battery BT is approximately the target temperature TT (FIG. 2A). At this time, since the internal resistance of the storage battery BT is small, the electric vehicle 10 can be run while effectively using the electric power stored in the storage battery BT.

  An outline of communication performed between the electric vehicle 10 and the charging device 20 in the temperature control will be described with reference to FIG. As described above, the communication is performed via the cable CB that connects the two. The left side of FIG. 3 shows a flow of processing performed in the electric vehicle 10 (specifically, the control device 100). The right side of FIG. 3 shows a flow of processing performed by the charging device 20 (specifically, the control unit 210).

  First, on the electric vehicle 10 side, the necessity of temperature control is determined in step S11. Here, when the charging to the storage battery BT has been completed and the electric vehicle 10 and the charging device 20 are still connected with the cable CB, temperature control is necessary. It is determined. In addition to the above case, it may be determined that the temperature control is necessary only when the temperature of the storage battery BT is equal to or lower than a predetermined temperature.

  When it is determined that the temperature control is necessary, the temperature control control execution request signal SG <b> 1 is transmitted from the electric vehicle 10 to the charging device 20. In the charging device 20 that has received the execution request signal SG1, it is determined in step S21 whether or not to permit execution of the temperature control. For example, when the charging device 20 cannot accept the electric power from the electric vehicle 10 and can only charge the electric vehicle 10, it is determined that the temperature control is not permitted to be performed. Made.

  In step S <b> 21, when it is determined that the execution of the temperature control is permitted, a temperature control control permission signal SG <b> 2 is transmitted from the charging device 20 to the electric vehicle 10. In electrically powered vehicle 10 that has received permission signal SG2, preparation for execution of temperature control is performed in step S12. Here, processing for setting the target temperature and setting the amplitude and frequency of the oscillating current is performed.

  When preparation for execution of temperature control is completed in step S <b> 21, temperature control execution command signal SG <b> 3 is transmitted from electric vehicle 10 to charging device 20. The execution command signal SG3 includes a signal indicating a command regarding the direction (charge or discharge) of power to be transferred and a signal indicating a command value regarding a power value (or current value) to be charged / discharged.

  In the charging device 20 that has received the execution command signal SG3, the value and direction of the power exchanged with the electric vehicle 10 via the cable CB matches the value and direction indicated by the execution command signal SG3. The operation of the conditioner 220 is controlled by the control unit 210. Thereby, temperature control is started. At this time, power information signal SG4 is transmitted from charging device 20 to electric vehicle 10. The power information signal SG4 is a signal indicating a power value transmitted / received via the cable CB.

  In electrically powered vehicle 10 that has received power information signal SG4, the power value indicated by power information signal SG4 is monitored in step S13. In step S13, it is determined whether or not the power value exchanged via the cable CB is in accordance with the command value indicated in the execution command signal SG3. It is also determined whether or not the safe power value range is exceeded. If the power value exchanged via the cable CB is as specified and safe, the temperature control is continued. That is, the processes from the execution command signal SG3 to step S13 are repeatedly executed.

  When the predetermined release condition is satisfied, end command signal SG5 is transmitted from electric vehicle 10 to charging device 20. In the charging device 20 that has received the end command signal SG5, processing for stopping the operation of the conditioner 220 is performed in step S23. As a result, the temperature control is stopped, and power transfer via the cable CB is stopped.

  A specific processing flow executed by the temperature adjustment unit 110 of the control device 100 will be described with reference to FIG. The series of processing shown in the figure is repeatedly executed by the temperature adjustment unit 110 every time a predetermined control cycle elapses.

  In first step S31, it is determined whether or not electric vehicle 10 is in a standby state. Here, the “standby state” is a state in which charging of the storage battery BT is completed and the electric vehicle 10 and the charging device 20 are still connected by the cable CB. . For example, when the electric vehicle 10 is not in a standby state as in the case where the electric vehicle 10 is traveling, the series of processes shown in FIG. 4 is terminated. In this case, temperature control is not performed. When the electric vehicle 10 is in a standby state, the process proceeds to step S32.

  In step S32, processing for setting the target temperature is performed. The target temperature is a target value of the temperature of the storage battery BT in the temperature control, and is the target temperature TT in the example of FIG. In the present embodiment, the target temperature is not always fixed to the same value, but the target temperature is changed each time according to the type of the storage battery BT.

  The appropriate temperature at which the storage battery BT can sufficiently exhibit its performance varies depending on the type of the storage battery BT (for example, a lithium ion battery or a solid battery). In the temperature adjustment unit 110, a correspondence relationship between the type of the storage battery BT and an appropriate target temperature corresponding to the type is stored in advance as a map. The temperature adjustment unit 110 sets a target temperature according to the type of the storage battery BT by referring to the map.

  In step S33 following step S32, it is determined whether or not the target temperature set in step S32 is higher than the current temperature of the storage battery BT. When the target temperature is equal to or lower than the temperature of the storage battery BT, the series of processes shown in FIG. In this case, temperature control is not performed. When the target temperature is higher than the temperature of the storage battery BT, that is, when the current temperature of the storage battery BT is lower than the target temperature, the process proceeds to step S34.

  In step S34, the value of the electric power to be exchanged via the cable CB necessary to bring the temperature of the storage battery BT close to the target temperature, specifically, the vibration current described with reference to FIG. Amplitude and frequency are calculated and determined. The determination is made according to at least one of the shape, size, arrangement, and outside air temperature of the storage battery BT.

  For example, when the shape of the storage battery BT is large (that is, when the heat capacity is large), the amplitude and frequency of the oscillating current are determined so that the amount of generated heat is larger than when the shape is small. Specifically, each of the amplitude and frequency of the oscillating current is set to a larger value.

  Further, for example, when the storage battery BT has a shape with a large specific surface area (that is, when heat dissipation is large), the calorific value is increased as compared with a case with a shape with a small specific surface area. The amplitude and frequency are determined.

  Further, in the electric vehicle 10, when the storage battery BT is disposed in a place where heat is easily radiated, the amplitude and frequency of the vibration current are increased so that the amount of generated heat is larger than in the case where the storage battery BT is disposed where it is difficult to radiate heat. Is determined. Furthermore, when the outside air temperature is low, the amplitude and frequency of the oscillating current are determined so that the calorific value is larger than when the outside air temperature is high.

  Furthermore, in step S34, the amplitude and frequency of the oscillating current are determined so that the amount of electricity stored in the storage battery BT does not fall below the amount of electricity necessary until the electric vehicle 10 reaches the next destination.

  For example, when a storage amount corresponding to 70% SOC is necessary to reach the target value, the storage amount at the time when the vibration current becomes the largest on the discharge side (the storage amount in the example of FIG. 2C). The amplitude and frequency of the oscillating current are determined so that ST1) does not fall below the charged amount corresponding to 70% SOC. Thereby, even if it is a case where temperature control is stopped at what timing, the required electrical storage amount can be ensured reliably.

  It should be noted that the “power storage amount required until the electric vehicle 10 reaches the next destination” can be estimated and calculated based on, for example, a future travel route indicated in the navigation system. Instead of such a mode, a fixed value may always be used as “the amount of electricity necessary for the electric vehicle 10 to reach the next destination”.

  The amplitude and frequency of the oscillating current may be determined on the basis of a plurality of parameters indicating the state of the storage battery BT and the outside air temperature in addition to the above-described storage amount. Examples of the parameter include a parameter indicating the degree of deterioration of the storage battery BT such as the voltage of the storage battery BT and the usage time thus far. For example, when it is estimated that the deterioration degree of the storage battery BT is large by these parameters, even if the amplitude and frequency of the oscillating current are the same, the calorific value of the storage battery BT is smaller than when the deterioration degree is small. growing. For this reason, when the degree of deterioration of the storage battery BT is large, the amplitude of the oscillating current or the frequency of the oscillating current may be made smaller than when the degree of deterioration is small.

  In addition, when the outside air temperature is low, it is preferable to increase the amount of heat generated by the storage battery BT by increasing the amplitude of the oscillating current or increasing the frequency of the oscillating current as compared to when the outside air temperature is high.

  In step S34, after the amplitude and frequency of the oscillating current are calculated, the process proceeds to step S35. In step S35, it is determined whether a cancellation condition is satisfied. “Release condition” is a condition for terminating the temperature control. If the cancellation condition is satisfied, the series of processes shown in FIG. 4 is terminated without starting the temperature control. If the release condition is not satisfied, the process proceeds to step S36. The specific contents of the determination process performed in step S35 will be described in detail later with reference to FIG.

  In step S36, temperature control is executed. Here, the command value (command value of the current to be charged / discharged) necessary for generating the oscillating current having the amplitude and frequency calculated in step S34 is supplied to the charging apparatus 20 as the execution command signal SG3 in FIG. Is sent.

  Thereafter, the processing of step S35 and step S36 is repeatedly executed, and thereby the oscillating current is supplied to the storage battery BT. At this time, if the release condition is satisfied in step S35, as described with reference to FIG. 3, the end command signal SG5 is transmitted from the electric vehicle 10 to the charging device 20, and the temperature control is stopped. Thereafter, the series of processes shown in FIG.

  Note that the processing in step S35 and step S36 corresponds to the processing from transmission of the execution command signal SG3 to step S13 in FIG.

  Specific contents of the determination process performed in step S35 will be described with reference to FIG. In the first step S41 of the process, it is determined whether or not the connection between the electric vehicle 10 and the charging device 20 via the cable CB is released. If the connection is released, the process proceeds to step S47. When the process proceeds from step S41 to step S47, it is impossible to perform temperature control. Therefore, in step S47, it is determined that the release condition is satisfied. As described above, the release of the connection by the cable CB corresponds to one of the release conditions in the present embodiment.

  If the connection via the cable CB has not been released in step S41, the process proceeds to step S42. In step S42, it is determined whether or not the state of the storage battery BT is normal based on a plurality of parameters indicating the state of the storage battery BT. For example, when the temperature of the storage battery BT does not increase at all, or when the current supplied to the storage battery BT remains 0, it is estimated that some abnormality has occurred in the storage battery BT and its surroundings. Accordingly, in such a case, the process proceeds to step S47, and it is determined that the release condition is satisfied. Thus, the fact that the plurality of parameters indicating the state of the storage battery BT does not indicate the normal state corresponds to one of the release conditions in the present embodiment. When the state of the storage battery BT is normal, the process proceeds to step S43.

  In step S43, it is determined whether the elapsed time from the start of temperature control to the present is shorter than a predetermined threshold value. When the elapsed time reaches the threshold value or is longer than this, the process proceeds to step S47, and it is determined that the release condition is satisfied. Thereby, the situation where temperature control is continued over a long time, without the temperature of storage battery BT rising can be prevented. Thus, the fact that the elapsed time reaches the threshold value or is longer than this corresponds to one of the release conditions in the present embodiment. If the elapsed time is shorter than the threshold, the process proceeds to step S44.

  In step S44, it is determined whether or not the outside air temperature is lower than a predetermined upper limit temperature. When the outside air temperature is equal to or higher than the upper limit temperature, the temperature of the storage battery BT becomes an appropriate temperature without performing temperature control, and the internal resistance of the storage battery BT is likely to be sufficiently small. Therefore, in this case, the process proceeds to step S47, and it is determined that the release condition is satisfied. Thus, the fact that the outside air temperature is equal to or higher than the upper limit temperature corresponds to one of the release conditions in the present embodiment. In step S44, when the outside air temperature is lower than the upper limit temperature, the process proceeds to step S45.

  In step S45, it is determined whether or not the electricity bill is below a predetermined upper limit value. Here, the “electricity charge” is an electricity charge that accompanies the execution of the temperature control, that is, an electricity charge that is generated by receiving power supply from the power system PS from the start of the temperature control. . If the electricity rate is equal to or greater than the upper limit value, in this case, the process proceeds to step S47, where it is determined that the release condition is satisfied. As a result, it is possible to prevent a situation where an expensive electricity bill is charged by the temperature control. As described above, the fact that the electricity rate is equal to or higher than the upper limit corresponds to one of the cancellation conditions in the present embodiment. In step S45, if the electricity rate is below the upper limit value, the process proceeds to step S46.

  When the process proceeds to step S46, it is determined that the release condition is not satisfied. In this case, the process of step S36 in FIG. 4 is performed, and the temperature adjustment control by the temperature adjustment unit 110 is continued.

  As described above, the temperature adjustment unit 110 according to the present embodiment has a plurality of parameters indicating the state of the storage battery BT when the connection between the electric vehicle 10 and the charging device 20 via the cable CB is released. When at least a part of the elapsed time, the outside air temperature, and the electricity bill generated by charging satisfies a predetermined release condition, the processing for setting the storage battery BT as the target temperature (that is, temperature control) is terminated. Thereby, temperature control can be complete | finished at an appropriate timing.

  The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

10: Electric vehicle 20: Charging device 100: Control device 110: Temperature adjusting unit BT: Storage battery CB: Cable

Claims (7)

A control device (100) for controlling charging of an electric vehicle (10),
The electric vehicle is configured to charge the storage battery (BT) with electric power supplied via the cable in a state where the electric vehicle is connected to the charging device (20) by the cable (CB).
After the electric vehicle and the charging device are connected by the cable and charging the storage battery is completed, power is exchanged with the charging device via the cable. Thereby, a control apparatus provided with the temperature adjustment part (110) which heats up or keeps the said storage battery so that it may become predetermined | prescribed target temperature.   The control device according to claim 1, wherein the target temperature is determined according to a type of the storage battery.   The power charged or discharged in the storage battery in order to set the storage battery as the target temperature is determined according to at least one of the shape, size, arrangement, and outside air temperature of the storage battery. The control device described. The temperature adjustment unit is
The control device according to any one of claims 1 to 3, wherein charging from the charging device to the storage battery and discharging from the storage battery to the charging device are repeated, thereby generating an oscillating current in the storage battery. . The temperature adjustment unit is
5. The control according to claim 4, wherein the amplitude and frequency of the oscillating current are determined so that a storage amount of the storage battery does not fall below a storage amount necessary for the electric vehicle to reach a next destination. apparatus. The temperature adjustment unit is
The control device according to claim 5, wherein an amplitude and a frequency of the oscillating current are determined based on a plurality of parameters indicating the state of the storage battery and an outside air temperature. The temperature adjustment unit is
When the connection between the electric vehicle and the charging device via the cable is released, or a plurality of parameters indicating the state of the storage battery, the elapsed time, the outside air temperature, and the electricity charge generated with the charging, The control device according to any one of claims 1 to 6, wherein when at least a part of the battery satisfies a predetermined release condition, the process of setting the storage battery to the target temperature is terminated.

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