server

Abstract

To provide a server capable of preventing electrical energy transmitted from an electric vehicle from not reaching a contract volume of demand response.SOLUTION: A server 100 comprises a communication unit 103 (acquisition unit) for acquiring temperature information of a battery 11 of an electric vehicle 10, and a processor 101. At least on the basis of the temperature information, the processor 101 predicts a temperature trend of the battery 11 during a response period in which it is possible to respond to an electricity demand and supply adjustment request from a power grid PG (power network). On the basis of the temperature trend, the processor 101 estimates a time zone in which a temperature of the battery 11 falls within a range of non-restricted temperature zone (a temperature zone within which electricity transmission is restricted) within the response period. On the basis of the estimated time zone, the processor 101 sets a time zone in which the electric vehicle 10 performs electricity transmission in response to the electricity demand and supply adjustment request.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to a server.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2021-158838 (Patent Document 1) discloses a vehicle that charges or discharges in response to demand response in an electric power grid.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, there is a temperature range of the battery suitable for the vehicle to charge and discharge. When the temperature of the battery is out of the above temperature range, the charging power and discharging power of the vehicle may be restricted. When the vehicle responds to a demand response (a power supply and demand adjustment request based on the amount of electric power in the power grid) in a state where the charging power and discharging power are restricted, the charging power amount or discharging power amount (transmitted power amount) may not reach the approximate amount of the demand response.

[0005] This disclosure has been made to solve the above problems, and an object thereof is to provide a server capable of suppressing the transmitted power amount from an electric vehicle from failing to reach the approximate amount of a demand response.

Means for Solving the Problems

[0006] A server relating to one aspect of this disclosure is a server for managing power transmission by at least one electric vehicle capable of power transmission including at least one of charging from and discharging to the power grid, and comprises an acquisition unit for acquiring battery temperature information of the at least one electric vehicle, and a processor. The power transmitted in power transmission of the at least one electric vehicle is not restricted when the battery temperature is within the unrestricted temperature range. Based on the temperature information of the at least one electric vehicle, the processor predicts the temperature trend of the battery during a response period in which it can respond to power supply and demand adjustment requests from the power grid, and estimates the time period within the response period in which the battery temperature is within the unrestricted temperature range, based on the temperature trend. Based on the estimated time period, the processor sets the time period in which the at least one electric vehicle performs power transmission in response to power supply and demand adjustment requests.

[0007] In a server relating to one aspect of this disclosure, as described above, the time period for performing power transmission in response to power supply and demand adjustment requests is set based on the time period during which the battery temperature is within the unrestricted temperature range. This allows power transmission to be performed during the time period when the battery's transmitted power is not restricted. As a result, it is possible to prevent the amount of power transmitted from the electric vehicle from falling below the agreed-upon amount for demand response.

[0008] In the server relating to the first aspect described above, preferably, the processor predicts the temperature trend of the battery based on at least one of the following: the distance between the current location of the at least one electric vehicle and the destination where power transmission is scheduled to be performed, the temperature trend between the current location and the destination, and the temperature trend at the destination. With this configuration, the temperature trend of the battery can be easily estimated using the distance traveled by the electric vehicle based on the distance and the temperature trend information.

[0009] In the server relating to the first aspect described above, preferably, the processor performs control to send a battery temperature adjustment command to the at least one electric vehicle when the amount of power transmitted by the at least one electric vehicle is less than the agreed amount for the power supply and demand adjustment request, and the power transmission of the at least one electric vehicle is limited for at least a part of the response period. With this configuration, the degree to which the power transmission is limited can be improved (the time of limitation is shortened) by adjusting the battery temperature. As a result, the amount of power transmission can be easily increased to more than the agreed amount.

[0010] In this case, preferably, the at least one electric vehicle includes a plurality of electric vehicles with limited transmission power. For each of the plurality of electric vehicles, the amount of transmission power limitation increases as the battery temperature moves away from the unlimited temperature range. The processor performs control to preferentially send temperature adjustment commands to the electric vehicle with the smaller transmission power limitation among the plurality of electric vehicles. With this configuration, the amount of temperature adjustment based on the temperature adjustment command can be made relatively small by preferentially sending temperature adjustment commands to the electric vehicle with the smaller transmission power limitation.

[0011] In the server that transmits the above temperature adjustment command to the electric vehicle, preferably, the at least one electric vehicle includes a plurality of electric vehicles with limited transmission power. The processor controls the transmission of the temperature adjustment command preferentially to the electric vehicle with the least battery degradation among the plurality of electric vehicles. With this configuration, it is possible to suppress the transmission of the temperature adjustment command to the electric vehicle with a relatively high degree of battery degradation. As a result, it is possible to suppress further degradation of the battery in the electric vehicle with a relatively high degree of battery degradation. [Effects of the Invention]

[0012] According to this disclosure, it is possible to prevent the amount of power transmitted from electric vehicles from falling below the agreed-upon amount for demand response. [Brief explanation of the drawing]

[0013] [Figure 1] This is a diagram showing the configuration of a system according to one embodiment. [Figure 2] This diagram shows the relationship between the upper limit of transmission power and the battery temperature. [Figure 3] Figure 1 shows an example of the relationship between battery temperature and time. [Figure 4] Figure 2 shows an example of the relationship between battery temperature and time. [Figure 5] This figure shows the sequence of a system according to one embodiment. [Figure 6] This figure shows a modified example of step S12 in Figure 5. [Modes for carrying out the invention]

[0014] Embodiments of this disclosure will be described in detail below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their descriptions will not be repeated.

[0015] Figure 1 shows the configuration of System 1 according to this embodiment. System 1 comprises a server 100, a grid management server 200, a power grid PG, a plurality of electric vehicles 10, and EVSE (Electric Vehicle Supply Equipment) 20. Although only one EVSE 20 is shown in Figure 1, multiple EVSE 20 may be provided. The power grid PG is an example of the "power grid" in this disclosure.

[0016] The power grid (PG) is a power network constructed by power plants and transmission / distribution facilities (not shown). In this embodiment, the power company acts as both the power generator and the transmission / distribution operator. The power company corresponds to a general transmission / distribution operator and maintains and manages the power grid (PG). The power company corresponds to the manager of the power grid (PG).

[0017] The system management server 200 manages the power supply and demand in the power system PG (power grid). Also, the system management server 200 belongs to the power company. The system management server 200 transmits a request (power supply and demand adjustment request) for adjusting the power demand of the power system PG to the server 100 based on the generated power and consumed power by each power adjustment resource managed by the system management server 200.

[0018] The server 100 is a server managed by an aggregator. An aggregator is an electric utility that bundles a plurality of power adjustment resources such as regions and predetermined facilities to provide an energy management service. The server 100 manages the power transmission (described later) of each of the plurality of electric vehicles 10.

[0019] As one means for increasing or decreasing the power demand of the power system PG, the server 100 requests the electric vehicle 10 to perform "power transmission". Power transmission is control including power supply to the power system PG (external power supply / external discharge) and charging from the power system PG (external charging). The server 100 transmits a request signal for requesting power transmission to the electric vehicle 10 or a mobile terminal (not shown) owned by the user of the electric vehicle 10. Note that the electric vehicle 10 may be configured to be capable of only one of external power supply and external charging.

[0020] The request for power transmission includes information on the time period (response period capable of responding to the power supply and demand adjustment request) for requesting the execution of power transmission and information on the charging (discharging) required amount (approximate amount) within the above time period. Each user of the electric vehicle 10 returns to the server 100 the intention to respond to the power supply and demand adjustment request (demand response) and, if responding, information on the amount of power that the user can charge (discharge). Note that the user may transmit to the server 100 information on the time period within the above time period (response period) during which the user can respond. In this specification, it is assumed that all the electric vehicles 10 that respond to the power supply and demand adjustment request can respond to the power supply and demand adjustment request at any time within the above time period.

[0021] Power transmission is performed via the EVSE 20 between the electric vehicle 10 and the power grid PG. The electric vehicle 10 includes, for example, a PHEV (Plug-in Hybrid Electric Vehicle), a BEV (Battery Electric Vehicle), and a FCEV (Fuel Cell Electric Vehicle).

[0022] The electric vehicle 10 includes a battery 11 and a temperature sensor 12. Through power transmission, charging of the battery 11 or discharging from the battery 11 is performed. The temperature sensor 12 detects the temperature of the battery 11. The temperature sensor 12 may detect any of the ambient temperature around the battery 11, the temperature of the case (not shown) of the battery 11, or the temperature of the cells of the battery 11 itself.

[0023] The EVSE 20 means vehicle power supply equipment. The electric vehicle 10 is configured to be electrically connectable to the EVSE 20. For example, by connecting a charging cable 21 connected to the EVSE 20 to the inlet of the electric vehicle 10, it becomes possible to transfer electric power between the EVSE 20 and the electric vehicle 10.

[0024] Also, the server 100 is configured to manage the information of the registered electric vehicle 10 (hereinafter, also referred to as "vehicle information"), the information of each registered user (hereinafter, also referred to as "user information"), and the information of the registered EVSE 20 (hereinafter, also referred to as "EVSE information"). The user information, vehicle information, and EVSE information are distinguished by identification information (ID) and stored in the memory 102 described below.

[0025] The user ID is identification information for identifying a user and also functions as information (terminal ID) for identifying the mobile terminal 30 carried by the user. The server 100 is configured to distinguish and store the information received from the mobile terminal 30 for each user ID. The user information includes the communication address of the mobile terminal (not shown) carried by the user and the vehicle ID of the electric vehicle 10 belonging to the user.

[0026] The vehicle ID is identification information used to identify the electric vehicle 10. The vehicle ID may be a license plate number or a VIN (Vehicle Identification Number). The vehicle information includes the planned activities of each electric vehicle 10.

[0027] The EVSE-ID is identification information used to identify the EVSE20. The EVSE information includes the communication address of each EVSE20 and the status of the electric vehicle 10 connected to each EVSE20. The EVSE information also includes information indicating the combination of electric vehicles 10 and EVSE20 connected to each other (for example, a combination of the EVSE-ID and the vehicle ID).

[0028] The server 100 includes a processor 101, memory 102, and a communication unit 103. The communication unit 103 is an example of the "acquisition unit" in this disclosure.

[0029] Memory 102 stores the program executed by the processor 101, as well as information used by the program (e.g., maps, formulas, and various parameters). The communication unit 103 includes various communication interfaces. The processor 101 controls the communication unit 103. The communication unit 103 communicates with at least one of the electric vehicle 10, the EVSE 20, and the user's mobile terminal (not shown).

[0030] The communication unit 103 acquires information regarding power transmission between the electric vehicle 10 and the EVSE 20. Specifically, the communication unit 103 acquires information such as the amount of charge / discharge, the time of charge / discharge, and the time period during which the charge / discharge occurred between the electric vehicle 10 and the EVSE 20 during power transmission.

[0031] The communication unit 103 acquires user location information and speed information, etc., based on information from a GPS module (not shown) or the like in the electric vehicle 10. The communication unit 103 also receives temperature information of the battery 11 detected by the temperature sensor 12 from the electric vehicle 10.

[0032] The communications unit 103 receives temperature information, weather information, and traffic information, etc., via the Internet 300. This information may also include forecasts (future information).

[0033] Figure 2 shows the relationship between the upper limit of the transmitted power of the electric vehicle 10 and the temperature of the battery 11. The transmitted power may be either AC power or DC power. When the transmitted power is AC power, the vertical axis in Figure 2 represents the amplitude of the AC power.

[0034] As shown in Figure 2, when the temperature of the battery 11 is within the temperature range of 10°C to 30°C (hereinafter referred to as the unrestricted temperature range), the upper limit of the transmitted power is not restricted (does not decrease). On the other hand, the further the temperature of the battery 11 moves away from the unrestricted temperature range, the more the upper limit of the transmitted power is restricted (decreases). In temperature ranges where the temperature of the battery 11 is more than a certain amount away from the unrestricted temperature range (for example, more than 25°C), the upper limit of the transmitted power may remain constant. The unrestricted temperature range mentioned above is the temperature range suitable for charging and discharging the battery 11. Furthermore, the range of the unrestricted temperature range is not limited to the example given above.

[0035] In this case, if an electric vehicle responds to a power supply and demand adjustment request (demand response) while its transmitted power is limited, the amount of power transmitted between the electric vehicle and the power grid may not reach the agreed-upon amount of power required for the power supply and demand adjustment request (the amount of power requested based on the power supply and demand adjustment request).

[0036] Therefore, in this embodiment, the processor 101 estimates the time period during which the temperature of the battery 11 is within the unrestricted temperature range, based on the temperature trend of the battery 11 (see Figures 3 and 4), within the response period of the power supply adjustment request. Then, based on the estimated time period, the processor 101 sets the time period during which the electric vehicle 10 performs power transmission in response to the power supply adjustment request.

[0037] Figure 3 shows an example of a case where power transmission is performed after the electric vehicle 10 has been driven in a cold region with low temperatures. In the example shown in Figure 3, the temperature of the battery 11 from the past to the present is shown by a solid line, and the predicted temperature of the battery 11 is shown by a dashed line. The temperature of the battery 11 has risen due to the electric vehicle 10 being driven. As shown in Figure 3, it is assumed that the temperature of the battery 11 (predicted value) is within the non-restricted temperature range during the first half of the response period, T1. In this case, the period during which the electric vehicle 10 performs power transmission is set to period T1. Although the above example shows the temperature change of the battery 11 predicted a predetermined time before the response period, the temperature change of the battery 11 may also be predicted immediately before (at the beginning of) the response period.

[0038] Figure 4 shows an example of a case where power transmission is performed by the electric vehicle 10 after a predetermined waiting period in a region with high temperatures. In the example shown in Figure 4, the temperature of the battery 11 from the past to the present is shown by a solid line, and the predicted temperature of the battery 11 is shown by a dashed line. The temperature of the battery 11 is gradually rising due to the high ambient temperature. For example, as shown in Figure 4, let's assume that the temperature of the battery 11 is within the non-limiting temperature range during period T2 in the latter half of the response period. In this case, the period during which the electric vehicle 10 performs power transmission is set to period T2.

[0039] The processor 101 predicts the temperature trend of the battery 11 based on predetermined information. The predetermined information includes the temperature information of the battery 11 (current temperature) detected by the temperature sensor 12.

[0040] Furthermore, if the electric vehicle 10 is traveling before power transmission is performed, the predetermined information may also include the distance between the current location and the destination (the location of the EVSE 20 that performs power transmission) (i.e., the distance traveled). This makes it possible to predict the amount of heat generated by the battery 11 due to the operation of the electric vehicle 10.

[0041] Furthermore, the specified information may include information on temperature changes in the section between the current location and the destination. The temperature changes include at least one of the past temperature changes and predicted temperature changes in the section. This makes it possible to predict the amount of heat the battery 11 receives from the outside air while the electric vehicle 10 travels to the destination.

[0042] Furthermore, the specified information described above may include information on temperature trends at the destination. The temperature trends described above include at least one of the past and present temperature trends and predicted temperature trends at the destination. This makes it possible to predict the amount of heat the battery 11 receives from the outside air while the electric vehicle 10 is at the destination (while on standby or performing power transmission).

[0043] Furthermore, the specified information may include information on the temperature changes of the battery 11 from the past to the present. This makes it possible to predict the temperature changes of the battery 11 based on the temperature changes of the battery 11 from the past to the present. Furthermore, the specified information may include information on the planned actions of the electric vehicle 10 (for example, activating the heating or cooling during a predetermined time period). This makes it possible to predict the amount of heat generated by the battery 11 due to the planned actions of the electric vehicle 10.

[0044] Furthermore, the specified information may include vehicle speed information of the electric vehicle 10 and traffic information (congestion information) to the destination. This makes it possible to predict the amount of heat generated by the battery 11 based on the time it takes to reach the destination.

[0045] Furthermore, when the processor 101 predicts the temperature trend of the battery 11 based on the predetermined information described above, it may use a pre-trained model generated by machine learning techniques such as deep learning.

[0046] (System sequence) Figure 5 shows the sequence control by System 1. In step S1, the grid management server 200 sends a power supply and demand adjustment request to server 100. In step S2, server 100 sends a power transmission request based on the power supply and demand adjustment request in step S1 to each of the multiple electric vehicles 10.

[0047] The electric vehicle 10, having accepted the request in step S2, transmits the information from steps S3 to S5 to the server 100. Note that the order in which the information from steps S3 to S5 is transmitted to the server 100 is not limited to the example in Figure 5.

[0048] In step S3, the electric vehicle 10 transmits information about the temperature of the battery 11 to the server 100. This information includes, for example, the current temperature of the battery 11 and the temperature trend of the battery 11 from the past to the present.

[0049] In step S4, the electric vehicle 10 transmits its own location information (current location information) based on a GPS module (not shown) or the like to the server 100.

[0050] In step S5, the electric vehicle 10 transmits information to the server 100 about the location (destination) where it will perform power transmission in response to a power supply and demand adjustment request. The information from step S5 may be registered in the server 100 (memory 102) as base information where the electric vehicle 10 will perform power transmission.

[0051] In step S6, the server 100 (processor 101) calculates the distance between the current location of the electric vehicle 10 and the destination in step S5. The server 100 (communication unit 103) also obtains information on the temperature trend (for example, the temperature trend over the past hour) in the section between the current location and the destination, for example, via the internet 300.

[0052] In step S7, the server 100 (communication unit 103) obtains information on the temperature trend of the destination (for example, the temperature trend over the past hour) via, for example, the Internet 300.

[0053] In step S8, the server 100 predicts the temperature trend of the battery 11 based on the temperature information from step S3, the distance information calculated in step S6, and the temperature trend information obtained in steps S6 and S7. Information such as the battery's storage capacity and type may also be used to predict the temperature trend of the battery 11.

[0054] In step S9, the server 100 calculates the time period during which the temperature of the battery 11 will be within the unrestricted temperature range, based on the temperature trend of the battery 11 predicted in step S8. The server 100 then sets the calculated time period to the time period during which the electric vehicle 10 will perform power transmission in response to a power supply and demand adjustment request.

[0055] In step S10, the server 100 determines whether the estimated total amount of transmitted power (the total amount of power transmitted by the multiple electric vehicles 10) is smaller than the agreed amount for the power supply and demand adjustment request, based on the information about the power transmission time periods of each of the multiple electric vehicles 10 set in step S9. If the total amount of transmitted power is smaller than the agreed amount (Yes in S10), the process proceeds to step S11. If the total amount of transmitted power is equal to or greater than the agreed amount (No in S10), the process proceeds to step S14.

[0056] In step S11, the server 100 extracts electric vehicles 10 in which the temperature of the battery 11 falls within the limit temperature range (a temperature range other than the non-limit temperature range) for at least part of the response period.

[0057] In step S12, the server 100 preferentially sends a battery temperature adjustment command to the electric vehicles 10 with the smallest transmission power limit among the electric vehicles 10 extracted in step S11. Specifically, the server 100 sends the battery temperature adjustment command to the top N electric vehicles 10 with the smallest limit. Note that N and the temperature adjustment amount of the battery 11 may be calculated by the server 100 to satisfy the judgment condition in step S10 (the judgment is No), or they may be fixed values. Next, the process returns to step S8. Note that the transmission power limit may be, for example, the average value of the limit during the time when the temperature of the battery 11 is in the limit temperature range.

[0058] In step S13, the electric vehicle 10 determines whether or not it has received a battery temperature adjustment command corresponding to step S12. If it has received a battery temperature adjustment command (Yes in S13), the process proceeds to step S14.

[0059] In step S14, the electric vehicle 10 performs temperature adjustment based on the battery temperature adjustment command received in step S13. For example, the electric vehicle 10 may raise or cool the battery 11 by switching the flow path of the heat transfer medium.

[0060] In step S15, the server 100 sends a command to each electric vehicle 10 to perform power transmission.

[0061] In step S16, the electric vehicle 10 determines whether or not it has received a power transmission command from the server 100. If it has received a power transmission command (Yes in S16), the process proceeds to step S17. If it has not received a power transmission command (No in S16), the process returns to step S13. In step S17, the electric vehicle 10 performs power transmission according to the command in step S15.

[0062] As described above, in this embodiment, the processor 101 estimates the time period during the response period of the power supply adjustment request in which the temperature of the battery 11 is within the unrestricted temperature range, based on the predicted temperature trend of the battery 11. Based on the estimated time period, the processor 101 sets the time period in which the electric vehicle 10 performs power transmission in response to the power supply adjustment request. This makes it possible to suppress power transmission from being performed during the time period in which the power transmission capacity of the battery 11 is limited. As a result, it is possible to suppress the amount of power transmitted from the electric vehicle from falling below the agreed amount for the power supply adjustment request.

[0063] The above embodiment shows an example in which a battery temperature adjustment command is preferentially sent to electric vehicles 10 with a small limit on the amount of transmitted power, but the disclosure is not limited thereto. For example, step S112 shown in Figure 6 may be performed instead of step S12 in Figure 5. In step S112, the server 100 preferentially sends a battery temperature adjustment command to electric vehicles 10 among the electric vehicles 10 extracted in step S11 that have a low degree of battery degradation (SOH: State of Health). Specifically, the server 100 sends a battery temperature adjustment command to the top N electric vehicles 10 with the lowest degrees of degradation.

[0064] The above embodiment shows an example of transmitting a battery temperature adjustment command to the top N electric vehicles 10 with small transmission power limits, but the disclosure is not limited thereto. When selecting the top N electric vehicles 10, the storage capacity of the batteries 11 of the electric vehicles 10 may be taken into consideration. For example, among the electric vehicles 10 whose battery storage capacity 11 is below a predetermined threshold, a battery temperature adjustment command may be transmitted to the top N electric vehicles with small transmission power limits.

[0065] In the above embodiment, an example was shown in which the time period during which power transmission is performed is set to a time period during which the temperature of the battery 11 falls within the unrestricted temperature range for transmitted power. However, the disclosure is not limited thereto. For example, if power transmission is performed during at least a portion of the time period during which the temperature of the battery 11 falls within the unrestricted temperature range, power transmission may also be performed during the time period during which the temperature of the battery 11 falls within the restricted temperature range (a temperature range other than the unrestricted temperature range).

[0066] In the above embodiment, an example was shown in which the temperature trend of the battery 11 is predicted based on the distance between the current location and the destination, the temperature trend between the current location and the destination, and the temperature trend at the destination. However, this disclosure is not limited to this. The temperature trend of the battery 11 may be predicted based on some of the three elements described above. In addition, none of the three elements described above may be used. In this case, the temperature trend of the battery 11 is predicted based only on the temperature information of the battery 11.

[0067] The above embodiment shows an example in which a temperature adjustment specification for the battery 11 is transmitted to a portion of the electric vehicle 10 whose transmission power is limited, but the disclosure is not limited thereto. Temperature adjustment of the battery 11 is not required. In this case, the total amount of transmitted power may be increased by ensuring that power transmission is performed during at least a portion of the time period in which transmission power is limited (for example, during the time period in which the limit is smaller than a predetermined threshold). That is, the threshold for the amount of transmission power limit that restricts the execution of power transmission may be raised (relaxed).

[0068] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this disclosure is indicated by the claims rather than by the description of the embodiments above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0069] 10 Electric vehicle, 11 Battery, 100 Server, 101 Processor, 103 Communication unit (acquisition unit), PG Power system (power grid).

Claims

1. A server for managing power transmission by at least one electric vehicle capable of power transmission including at least one of charging from and discharging to the power grid, An acquisition unit that acquires temperature information of the battery of at least one of the electric vehicles, Equipped with a processor, In the case of the at least one electric vehicle, when the battery temperature is within the unrestricted temperature range, the transmitted power in the power transmission is not restricted. The aforementioned processor, Based at least the temperature information, predict the temperature trend of the battery during the response period in which it can respond to power supply and demand adjustment requests from the power grid, Based on the temperature changes described above, estimate the time period during which the battery temperature falls within the unrestricted temperature range. Based on the estimated time period, set a time period during which at least one electric vehicle will perform the power transmission in response to the power supply and demand adjustment request. A server that performs control to transmit a battery temperature adjustment command to the at least one electric vehicle when the amount of power transmitted by the power transmission of the at least one electric vehicle is less than the agreed amount of the power supply and demand adjustment request, and when the power transmission of the at least one electric vehicle is limited for at least a part of the response period.

2. The server according to claim 1, wherein the processor predicts the temperature trend of the battery based on at least one of the following: the distance between the current location of the at least one electric vehicle and the destination where the power transmission is to be performed; the temperature trend between the current location and the destination; and the temperature trend at the destination.

3. The aforementioned at least one electric vehicle includes a plurality of electric vehicles whose transmission power is limited, In each of the aforementioned multiple electric vehicles, the limit on the transmitted power increases as the temperature of the battery moves away from the non-limiting temperature range. The server according to claim 1 or 2, wherein the processor performs control to preferentially transmit the temperature adjustment command to the electric vehicle with the smallest limit on the transmitted power among the plurality of electric vehicles.

4. The aforementioned at least one electric vehicle includes a plurality of electric vehicles whose transmission power is limited, The server according to claim 1 or 2, wherein the processor performs control to preferentially transmit the temperature adjustment command to the electric vehicle among the plurality of electric vehicles that has a low degree of battery degradation.

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