Emission amount calculation method, program, and emission amount calculation system

Abstract

In the emission amount calculation method, a second server (12) (management system (200)) is used to acquire charging information pertaining to charging of a battery (22) of an electric vehicle (2) with first power derived from renewable energy and charging of the battery (22) with second power derived from system power. Furthermore, in the discharge amount calculation method, the second server (12) is used to calculate the ratio of the charging power amount with the first power to the charging power amount of the storage battery (22) on the basis of the charging information. Furthermore, in the emission amount calculation method, the emission amount of carbon dioxide in the electric vehicle (2) is calculated using a second server (12) on the basis of the ratio, a first emission coefficient, which is the emission coefficient of carbon dioxide for the renewable energy source, and a second emission coefficient, which is the emission coefficient of carbon dioxide for the system power. In addition, in the emission amount calculation method, the emission amount of carbon dioxide is output.

Description

Technical Field

[0001] The present invention relates to an emission amount calculation method and the like for calculating the emission amount of carbon dioxide emitted by an electric vehicle. Background Art

[0002] Patent Document 1 discloses a system for granting energy-saving points based on the amount of CO2 (carbon dioxide) reduction. In this system, the electric energy used for charging is acquired, and the acquired electric energy is multiplied by the driving distance of the electric vehicle per 1 kWh to calculate the estimated driving distance of the electric vehicle. Then, in this system, the amount of CO2 reduction is calculated by multiplying the estimated driving distance by the amount of CO2 reduction per 1 km.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-059197 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] The present invention provides an emission amount calculation method and the like which can easily and accurately determine the emission amount of carbon dioxide when an electric vehicle is traveling.

[0008] Solutions for solving problems

[0009] In an emission calculation method according to one embodiment of the present invention, at least one of an electric vehicle and a management system for managing the electric vehicle is used to obtain charging information related to charging of a battery of the electric vehicle with a first electric power derived from renewable energy and charging of the battery with a second electric power derived from system power. In addition, in the emission calculation method, the ratio of charging electric energy with the first electric power to charging electric energy of the battery is calculated based on the charging information using at least one of the electric vehicle and the management system. In addition, in the emission calculation method, the emission of carbon dioxide in the electric vehicle is calculated based on the ratio, a first emission coefficient, which is an emission coefficient of carbon dioxide for the renewable energy, and a second emission coefficient, which is an emission coefficient of carbon dioxide for the system power, using at least one of the electric vehicle and the management system. In addition, in the emission calculation method, the emission of carbon dioxide is output.

[0010] In an emission amount calculation method according to one embodiment of the present invention, at least one of an electric vehicle and a management system for managing the electric vehicle is used to obtain charging information related to charging of a battery of the electric vehicle with a first electric power derived from renewable energy and charging of the battery with a second electric power derived from system power, and electric energy consumed by running the electric vehicle. In addition, in the emission amount calculation method, the ratio of the charging electric energy with the first electric power to the charging electric energy of the battery is calculated based on the charging information using at least one of the electric vehicle and the management system. In addition, in the emission amount calculation method, the emission of carbon dioxide in the electric vehicle is calculated based on the ratio, a first emission coefficient that is an emission coefficient of carbon dioxide for the renewable energy, a second emission coefficient that is an emission coefficient of carbon dioxide for the system power, and electric energy consumed by running the electric vehicle using at least one of the electric vehicle and the management system. In addition, in the emission amount calculation method, the emission of carbon dioxide is output.

[0011] A program according to one embodiment of the present invention causes one or more processors to execute the emission amount calculation method.

[0012] An emission calculation system according to one embodiment of the present invention is an emission calculation system provided by either an electric vehicle or a management system for managing the electric vehicle. The emission calculation system includes: an acquisition unit, a first calculation unit, a second calculation unit, and an output unit. The acquisition unit acquires charging information related to charging of a battery of the electric vehicle with a first electric power derived from renewable energy and charging of the battery with a second electric power derived from system power. The first calculation unit calculates the ratio of the charging electric energy with the first electric power to the charging electric energy of the battery based on the charging information. The second calculation unit calculates the emission of carbon dioxide in the electric vehicle based on the ratio, a first emission coefficient, which is an emission coefficient of carbon dioxide for the renewable energy, and a second emission coefficient, which is an emission coefficient of carbon dioxide for the system power. The output unit outputs the emission of carbon dioxide.

[0013] An emission calculation system according to one embodiment of the present invention is an emission calculation system provided in either an electric vehicle or a management system for managing the electric vehicle. The emission calculation system includes an acquisition unit, a first calculation unit, a second calculation unit, and an output unit. The acquisition unit acquires charging information related to charging of a storage battery of the electric vehicle with a first electric power derived from renewable energy and charging of the storage battery with a second electric power derived from system power, and electric energy consumed by the travel of the electric vehicle. The first calculation unit calculates the ratio of the charging electric energy with the first electric power to the charging electric energy of the storage battery based on the charging information. The second calculation unit calculates the emission of carbon dioxide in the electric vehicle based on the ratio, a first emission coefficient which is an emission coefficient of carbon dioxide for the renewable energy, a second emission coefficient which is an emission coefficient of carbon dioxide for the system power, and electric energy consumed by the travel of the electric vehicle. The output unit outputs the emission of carbon dioxide.

[0014] Effects of the Invention

[0015] The emission amount calculation method and the like of the present invention have the advantage of being able to easily and accurately determine the carbon dioxide emission amount when an electric vehicle is traveling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a block diagram showing the overall configuration of the emission amount calculation system according to the embodiment.

[0017] Figure 2 It is a diagram showing an example of charging information.

[0018] Figure 3 This is a diagram showing an example of the charging history of the battery of the electric vehicle.

[0019] Figure 4 This is a diagram showing an example of emission amount information.

[0020] Figure 5 This is a diagram showing an example of the details of the electric energy consumed in the battery of the electric vehicle.

[0021] Figure 6 It is a sequence diagram showing an operation example of the emission amount calculation system according to the embodiment. DETAILED DESCRIPTION

[0022] (Implementation Method) [1. Technical Background]

[0024] First, the technical background of the emission calculation method and emission calculation system involved in the embodiment of the invention is described. When achieving carbon neutrality that makes carbon dioxide emissions essentially zero, it is sought to reduce carbon dioxide emissions when electric vehicles are running. In particular, for companies that manufacture electric vehicles, in order to reduce supply chain emissions in the GHG (Greenhouse Gas: greenhouse gas) protocol, reducing carbon dioxide emissions when electric vehicles are used, that is, when they are running, has become an important issue.

[0025] Here, if the battery of an electric vehicle is charged with electricity from renewable energy sources with low carbon dioxide emissions, the carbon dioxide emissions of the electric vehicle when it is running can be reduced. However, the battery of an electric vehicle is not necessarily charged only with electricity from renewable energy sources, but also with electricity from system power. Therefore, if it is not known what source of electricity is used to charge the battery of the electric vehicle, there is a problem that the carbon dioxide emissions of the electric vehicle when it is running cannot be calculated with high accuracy.

[0026] In addition, if the amount of carbon dioxide emissions from electric vehicles cannot be calculated with high accuracy, it will be difficult to generate incentives for promoting the popularization of electric vehicles and investments related to the introduction of renewable energy. In addition, if the amount of carbon dioxide emissions from electric vehicles cannot be calculated with high accuracy, it will be difficult for corporate efforts to reduce carbon dioxide emissions to be reflected in the degree of reduction in carbon dioxide emissions.

[0027] In view of the above, the inventors have arrived at the present invention.

[0028] The following is a reference to the attached Figure 1 The embodiments are specifically described. In addition, the embodiments described below are all methods of showing general or specific examples. The numerical values, shapes, materials, structural elements, configuration positions and connection methods of structural elements, steps, and the order of steps shown in the following embodiments are examples, and their purpose is not to limit the present invention. In addition, among the structural elements in the following embodiments, the structural elements not recorded in the independent claims are described as arbitrary structural elements.

[0029] In addition, each figure is a schematic diagram and does not necessarily illustrate the illustration strictly. In addition, in each figure, the same reference numerals are attached to substantially the same structure, and repeated descriptions may be omitted or simplified.

[0030] [2. Structure]

[0031] Next, use Figure 1 The overall configuration of the emission amount calculation system according to the embodiment will be described. Figure 11 is a block diagram showing the overall configuration of the emission amount calculation system 100 according to the embodiment.

[0032] In an embodiment, if Figure 1 As shown, the emission amount calculation system 100 is realized by the second server 12. The second server 12 is configured to be able to communicate with the first server 11 and the electric vehicle 2 via a network N1 such as the Internet.

[0033] The first server 11 is a server that manages the energy management system 35 by communicating with the energy management system 35 installed in the facility 3 via the network N1. Figure 1 In the example shown, the first server 11 communicates with one energy management system 35 installed in the facility 3, but when there are multiple facilities 3, the first server 11 communicates with each of the multiple energy management systems 35 installed in the multiple facilities 3. In this case, the first server 11 manages the multiple energy management systems 35. In the following description, the focus is on the one energy management system 35 managed by the first server 11.

[0034] The first server 11 includes a first communication unit 111 , a first processing unit 112 , and a first storage unit 113 .

[0035] The first communication unit 111 is a communication module (communication circuit) that communicates with an external system via the network N1. In the embodiment, the first communication unit 111 communicates with the second communication unit 121 of the second server 12 as an external system via the network N1. In addition, the first communication unit 111 communicates with the energy management system 35 as an external system via the network N1. Thus, the first communication unit 111 obtains charging information regularly sent from the energy management system 35.

[0036] The charging information is information related to the charging of the battery 22 of the electric vehicle 2. Specifically, the charging information is information related to the charging of the battery 22 of the electric vehicle 2 with the first electric power derived from the renewable energy source and the charging of the battery 22 with the second electric power derived from the system power. The charging information includes not only the latest information related to the charging of the battery 22 of the electric vehicle 2, but also includes the past charging history records. In the embodiment, as described later, there are cases where the battery 22 of the electric vehicle 2 is charged using the electric power generated by the solar power generation system 34, and a case where it is charged using the electric power supplied from the power system 4. That is, in the embodiment, the first electric power derived from the renewable energy source is the electric power generated by the solar power generation system 34.

[0037] The first processing unit 112 performs processing to realize various functions of the first server 11. The first processing unit 112 is implemented by a microcomputer, for example, but may also be implemented by a processor or a dedicated circuit. The functions of the first processing unit 112 are implemented by hardware such as a microcomputer or a processor constituting the first processing unit 112 executing a computer program (software) stored in the first storage unit 113. The first processing unit 112 stores the charging information acquired from the energy management system 35 via the first communication unit 111 in the first storage unit 113.

[0038] The first storage unit 113 is a storage device that stores information required for the processing executed by the first processing unit 112. The information stored in the first storage unit 113 includes a computer program executed by the first processing unit 112. The first storage unit 113 is implemented by, for example, a semiconductor memory. The first storage unit 113 stores charging information acquired from the energy management system 35.

[0039] The second server 12 is a server that manages the electric vehicle 2 by communicating with the electric vehicle 2 via the network N1. In other words, the second server 12 is a management system that manages the electric vehicle 2. Figure 1 In the example shown, the second server 12 communicates with one electric vehicle 2, but when there are multiple electric vehicles 2, the second server 12 communicates with each of the multiple electric vehicles 2. In this case, the second server 12 manages the multiple electric vehicles 2. In the following description, the focus is on one electric vehicle 2 managed by the second server 12.

[0040] The second server 12 includes a second communication unit 121 , a second processing unit 122 , and a second storage unit 123 .

[0041] The second communication unit 121 is a communication module (communication circuit) that communicates with an external system via the network N1. In the embodiment, the second communication unit 121 communicates with the first communication unit 111 of the first server 11 as an external system via the network N1. In addition, the second communication unit 121 communicates with the electric vehicle 2 as an external system via the network N1. The second communication unit 121 obtains charging information from the energy management system 35 via the first server 11. Thus, the second communication unit 121 obtains charging information regularly, that is, at predetermined intervals. The second communication unit 121 is equivalent to the acquisition unit 101 in the emission calculation system 100.

[0042] In addition, the second communication unit 121 communicates with the electric vehicle 2 as an external system via the network N1, thereby periodically acquiring the electric energy consumed by the running of the electric vehicle 2. In addition, when the emission of carbon dioxide is calculated only by the first method in the second calculation unit 103 described later, the second communication unit 121 may not acquire the electric energy consumed by the running of the electric vehicle 2.

[0043] In addition, the second communication unit 121 sends the carbon dioxide emissions calculated in the second calculation unit 103 described later to the external system via the network N1. The external system here can include, for example, the electric vehicle 2, a server operated by a company that manufactures the electric vehicle 2, or an information terminal owned by a user of the electric vehicle 2. The information terminal can include, for example, a smart phone, a tablet terminal, or a personal computer. The second communication unit 121 is equivalent to the output unit 104 in the emission calculation system 100. The second communication unit 121 can send the carbon dioxide emissions to the external system regularly, or send the carbon dioxide emissions to the external system according to a request from the external system.

[0044] The second processing unit 122 performs processing to realize various functions of the second server 12. The second processing unit 122 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit. The functions of the second processing unit 122 are realized by hardware such as a microcomputer or a processor constituting the second processing unit 122 executing a computer program (software) stored in the second storage unit 123. The second processing unit 122 stores the charging information acquired from the first server 11 via the second communication unit 121 in the second storage unit 123.

[0045] In addition, the second processing unit 122 includes the first calculation unit 102 and the second calculation unit 103 in the emission amount calculation system 100. In the embodiment, the function of the first calculation unit 102 and the function of the second calculation unit 103 are realized by hardware such as a microcomputer or a processor constituting the second processing unit 122 executing a predetermined program.

[0046] The first calculation unit 102 calculates the ratio (here, percentage) of the charging energy of the storage battery 22 with the first electric power based on the charging information acquired by the acquisition unit 101 (the second communication unit 121). Figure 2 and Figure 3 A specific example of calculation of the ratio by the first calculation unit 102 will be described. Figure 2 It is a diagram showing an example of charging information. Figure 3 This is a diagram showing an example of the charging history of the battery 22 of the electric vehicle 2 .

[0047] exist Figure 2In the table, "Date and Time" indicates the time period during which the battery 22 of the electric vehicle 2 is charged, "Power Purchased" indicates the electric energy supplied from the power system 4 (in "kWh"), and "Solar Power Generation" indicates the electric energy generated by the solar power generation system 34 (in "kWh"). Figure 2 In the figure, “Vehicle ID” represents the identifier of the electric vehicle 2, “EV charge amount” represents the electric energy (in “kWh”) charged to the battery 22 of the electric vehicle 2, and “Ratio” represents the ratio (in “%) calculated by the first calculation unit 102.

[0048] exist Figure 3 In FIG. 1 , the electric energy obtained by charging the battery 22 of the electric vehicle 2 with the first electric power and the electric energy obtained by charging the battery 22 with the second electric power are visually represented. Figure 3 In FIG. 1 , a rectangle with solid hatching indicates electric energy obtained by charging with the first electric power, and a rectangle with dotted hatching indicates electric energy obtained by charging with the second electric power. Figure 3 (a) Figure 3 (b) Figure 3 (c) and Figure 3 (d) respectively represent the state of the battery 22 from 10:00 to 10:30, the state of the battery 22 from 10:30 to 11:00, the state of the battery 22 from 11:30 to 12:00, and the state of the battery 22 from 12:30 to 13:00.

[0049] Here, the sum of the "purchased electricity amount" and the "solar power generation amount" in any time period is assumed to be equivalent to the "EV charging amount". In other words, the power supplied from the power system 4 (second power) and the power generated by the solar power generation system 34 (first power) in any time period are assumed to be all used for charging the battery 22 of the electric vehicle 2.

[0050] For example, in the time period of 10:00-10:30, the "EV charging amount" is 3kWh; in contrast, the "solar power generation amount" is 1kWh. In this case, the first calculation unit 102 calculates the ratio of 10:00-10:30 as: 100×1 / 3≈33%. In addition, for example, in the time period of 10:00-13:00, the "EV charging amount" is 3+3+3+3=12kWh; in contrast, the "solar power generation amount" is 1+3+3+2=9kWh. In this case, the first calculation unit 102 calculates the ratio of 10:00-13:00 as: 100×9 / 12=75%.

[0051] The second calculation unit 103 calculates the amount of carbon dioxide emissions in the electric vehicle 2 based on the ratio calculated by the first calculation unit 102 , a first emission coefficient for carbon dioxide emissions from renewable energy, and a second emission coefficient for carbon dioxide emissions from grid power.

[0052] The first emission coefficient and the second emission coefficient are both emission coefficients disclosed by, for example, the government through a homepage, and the emission coefficients are pre-stored in the second storage unit 123. Here, the first emission coefficient is set to 0 [t-CO2 / kWh] for explanation. Of course, the first emission coefficient may also be a value different from 0 [t-CO2 / kWh]. In addition, here, the second emission coefficient is set to 0.0004 [t-CO2 / kWh] for explanation. Of course, the second emission coefficient may also be a value different from 0.0004 [t-CO2 / kWh].

[0053] The first emission factor may be, for example, an emission factor disclosed by a company providing a power supply system (here, the solar power generation system 34) that generates the first power, via a homepage, etc. The second emission factor may be, for example, an emission factor disclosed by a power company operating the power system 4, via a homepage, etc.

[0054] Here, there are two methods described below as the second calculation unit 103 calculating the carbon dioxide emission of the electric vehicle 2. The second calculation unit 103 may calculate the carbon dioxide emission by only one of the two methods described below, or may calculate the carbon dioxide emission by both methods.

[0055] In the first method, when the acquisition unit 101 acquires the charging information, the second calculation unit 103 regards that the electric energy charged to the storage battery 22 of the electric vehicle 2 is all consumed in the electric vehicle 2, and calculates the carbon dioxide emission in the electric vehicle 2. Here, the electric energy charged to the storage battery 22 of the electric vehicle 2 is the total amount of electric energy charged to the storage battery 22 from the time when the electric vehicle 2 is connected to the charging device 31 via, for example, a power cable and charging is started to the time when the power cable is unplugged from the electric vehicle 2 and charging is ended.

[0056] Specifically, in the first method, the second calculation unit 103 calculates the emission of carbon dioxide according to the following formula (1). In the formula (1), "A1" represents the emission of carbon dioxide, "P1" represents the charging power of the battery 22 charged to the electric vehicle 2, "α" represents the ratio of the charging power with the first electric power to the charging power of the battery 22, "C1" represents the first emission coefficient, and "C2" represents the second emission coefficient.

[0057] A1=P1×α×C1+P1×(1-α)×C2…(1)

[0058] For example, assume that the acquisition unit 101 acquires Figure 2 The charging information of the time period of 10:00-13:00 is shown. In this case, since the charging power of the storage battery 22 charged to the electric vehicle 2 is 12 kWh, the ratio calculated by the first calculation unit 102 is 75%, so the second calculation unit 103 calculates the carbon dioxide emission of the electric vehicle 2 according to the above formula (1): 12×75[%]×0+12×25[%]×0.0004=0.0012[t].

[0059] In the second method, the second calculation unit 103 calculates the amount of carbon dioxide emissions based on the electric energy consumed when the electric vehicle 2 travels. In this case, the second calculation unit 103 calculates the amount of carbon dioxide emissions in the electric vehicle 2 based on the ratio calculated by the first calculation unit 102, the first emission coefficient, the second emission coefficient, and the electric energy consumed by the electric vehicle 2 traveling.

[0060] Specifically, in the second method, the second calculation unit 103 calculates the emission of carbon dioxide according to the following formula (2). In formula (2), "A2" represents the emission of carbon dioxide, and "P2" represents the electric energy consumed when the electric vehicle is running. In addition, "α", "C1" and "C2" are the same as formula (1).

[0061] A2=P2×α×C1+P2×(1-α)×C2…(2)

[0062] The following uses Figure 4 and Figure 5 A specific example of calculation of the emission amount of carbon dioxide by the second calculation unit 103 will be described. Figure 4 2 is a diagram showing an example of emission amount information. The emission amount information is information on the emission amount of carbon dioxide of the electric vehicle 2. Figure 5 This is a diagram showing an example of the details of the electric energy consumed in the battery 22 of the electric vehicle 2 .

[0063] exist Figure 4 In the example, "Date and Time" indicates the time period during which the electric vehicle 2 travels, "Driving Distance" indicates the distance traveled by the electric vehicle 2 (in "km"), "Power Consumption" indicates the power consumed by the electric vehicle 2 when traveling (in "kWh"), and "Proportion" indicates the proportion calculated by the first calculation unit 102 (in "%). Figure 4 In the figure, "CO2 emission" indicates the emission of carbon dioxide during the driving period of the electric vehicle 2 calculated by the second calculation unit 103 (in units of "t-CO2 / kWh"). Figure 4 In the example shown, the date and time are Figure 2 The date on which the charging information was obtained is different from the date shown. Figure 4 In the example shown, the ratio calculated by the first calculation unit 102 is the ratio calculated by the acquisition unit 101 based on the Figure 2 The ratio is calculated based on the charging information for the time period of 10:00-13:00 as shown. In addition, the emission information may not include the distance traveled by the electric vehicle 2.

[0064] exist Figure 5 In FIG. 1 , the electric energy charged to the storage battery 22 of the electric vehicle 2 at the point P and the electric energy charged to the storage battery 22 of the electric vehicle 2 at the point Q are visually represented. Figure 5 In, with Figure 3 Similarly, a rectangle with solid hatching indicates electric energy obtained by charging with the first electric power, and a rectangle with dotted hatching indicates electric energy obtained by charging with the second electric power. Figure 5 In the example shown, since the electric vehicle 2 travels from point P to point Q, the electric energy charged in the storage battery 22 is consumed. Moreover, the consumed electric energy is considered to be the electric energy charged with the first electric power and the electric energy charged with the second electric power. The ratio of these electric energies is equivalent to the above ratio. That is, here, the consumed electric energy of the first electric power is 75%, and the consumed electric energy of the second electric power is 25%.

[0065] For example, during the time period of 9:00-10:00, since the power consumption is 2 kWh, the ratio calculated by the first calculation unit 102 is 75%, so the second calculation unit 103 calculates the carbon dioxide emissions of the electric vehicle 2 during this time period according to the above formula (2): 2×75[%]×0+2×25[%]×0.0004=0.0002[t].

[0066] The second storage unit 123 is a storage device that stores information required for the processing performed by the second processing unit 122. The information stored in the second storage unit 123 includes a computer program executed by the second processing unit 122. The second storage unit 123 is implemented by, for example, a semiconductor memory. The second storage unit 123 stores the charging information acquired from the first server 11, the ratio calculated by the first calculation unit 102, and the carbon dioxide emission calculated by the second calculation unit 103.

[0067] The electric vehicle 2 is a vehicle that uses the electric energy charged in the battery 22 as all or part of the power to travel. The electric vehicle 2 can include, for example, an electric car or a plug-in hybrid vehicle. The electric vehicle 2 includes an on-board charger 21, a battery 22, a drive unit 23, an ECU (Electronic Control Unit) 24, and a communication unit 25.

[0068] The on-vehicle charger 21 converts AC power supplied from the charging device 31 via a power cable into DC power suitable for charging and discharging the battery 22 , and supplies the DC power to the battery 22 .

[0069] The storage battery 22 is, for example, a lithium-ion battery, and receives electric power supplied from the charging device 31 via the on-vehicle charger 21 , thereby storing electric energy used as motive power for the electric vehicle 2 .

[0070] The driving unit 23 includes, for example, a motor and has a mechanism for driving the electric vehicle 2 to travel by rotating a plurality of wheels provided in the electric vehicle 2 using the electric energy stored in the battery 22 as power.

[0071] ECU24 performs processing to realize various functions by controlling various electronic devices provided in the electric vehicle 2. ECU24 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit. The functions of ECU24 are realized by hardware such as a microcomputer or a processor constituting ECU24 executing a computer program (software) stored in a memory.

[0072] The communication unit 25 is a communication module (communication circuit) that communicates with an external system via the network N1. In the embodiment, the communication unit 25 communicates with the second server 12 as an external system via the network N1.

[0073] The facility 3 is a residential facility such as a detached house or a collective house. In the embodiment, the "facility 3" is described as a detached house. The facility 3 includes a charging device 31, a distribution board 32, a power conditioner 33, a solar power generation system 34, an energy management system 35, an electric energy meter 36, and one or more loads 37.

[0074] The charging device 31 is configured to be connectable to the electric vehicle 2 via a power cable. When the charging device 31 is connected to the electric vehicle 2 via a power cable, it exchanges power with the electric vehicle 2 in accordance with the control of the energy management system 35. Specifically, the charging device 31 charges the battery 22 of the electric vehicle 2 by supplying power to the electric vehicle 2 via a power cable. In addition, the charging device 31 supplies power to the distribution board 32 by receiving power obtained by discharging the battery 22 of the electric vehicle 2 via a power cable. In other words, the charging device 31 supports the V2H (Vehicle to Home) function. In addition, the charging device 31 does not have to support the V2H function, as long as it has at least the function of charging the battery 22 of the electric vehicle 2.

[0075] The charging device 31 includes a DC-DC conversion circuit and an AC-DC conversion circuit. The charging device 31 performs AC / DC conversion between a voltage suitable for use in the facility 3 and a voltage suitable for charging and discharging the battery 22 of the electric vehicle 2, for example, through the AC-DC conversion circuit. For example, the voltage suitable for use in the facility 3 is an AC voltage of 100V. In addition, for example, the voltage suitable for charging and discharging the battery 22 of the electric vehicle 2 is a DC voltage of 300V to 400V.

[0076] The switchboard 32 is connected to one or more loads 37, the charging device 31, the power conditioner 33, and the power system 4. The switchboard 32 includes: one or more branch circuits, one or more relays, and one or more circuit breakers. The switchboard 32 branches the system power supplied from the power system 4 and supplies it to one or more loads 37 and the like. In addition, when charging the storage battery 22 of the electric vehicle 2, the switchboard 32 supplies power to the charging device 31. In addition, when the power discharged from the storage battery 22 of the electric vehicle 2 is supplied via the charging device 31, the switchboard 32 branches the power discharged from the storage battery 22 and supplies it to one or more loads 37 and the like. In addition, when the power generated by the solar power generation system 34 is supplied via the power conditioner 33, the switchboard 32 can branch the power and supply it to one or more loads 37 or the charging device 31. In addition, the switchboard 32 can also supply the power generated by the solar power generation system 34 to the power system 4.

[0077] The power conditioner 33 is connected between the solar power generation system 34 and the switchboard 32 . The power conditioner 33 converts the DC power generated by the solar power generation system 34 into AC power, and supplies the converted AC power to the switchboard 32 .

[0078] The solar power generation system 34 includes, for example, one or more solar cell modules installed on the roof of the facility 3. The solar power generation system 34 supplies power generated by the one or more solar cell modules under irradiation of sunlight to the switchboard 32 via the power conditioner 33.

[0079] The energy management system 35 is a so-called HEMS (Home Energy Management System) device, which manages energy (electricity, gas, etc.) consumed by multiple devices such as one or more loads 37 in the facility 3, and controls multiple devices. In the embodiment, the energy management system 35 obtains the electric energy consumed by the one or more loads 37 based on the current measured by the first current sensor 51 respectively provided in the one or more branch circuits between the distribution board 32 and the one or more loads 37. In addition, the energy management system 35 obtains the electric energy (equivalent to the electric energy supplied from the charging device 31 to the battery 22 of the electric vehicle 2) based on the current measured by the second current sensor 52 provided in the branch circuit between the distribution board 32 and the charging device 31. Figure 2 In addition, the energy management system 35 obtains the electric energy (equivalent to the electric energy) generated by the solar power generation system 34 based on the current measured by the third current sensor 53 provided between the distribution board 32 and the power conditioner 33. Figure 2 In addition, the energy management system 35 obtains the electric energy (equivalent to the electric energy supplied from the power system 4 to the distribution board 32) based on the electric energy measured by the electric energy meter 36 such as a smart electric energy meter. Figure 2 “Amount of electricity purchased” in the table above).

[0080] In the embodiment, the first current sensor 51 , the second current sensor 52 , and the third current sensor 53 are all clamp-type current transformers.

[0081] The energy management system 35 also has a communication module for performing short-range wireless communication with a repeater device such as a wireless router in accordance with a communication standard such as Wi-Fi (registered trademark). The energy management system 35 then communicates with the first server 11 via the repeater and the network N1.

[0082] The one or more loads 37 include, for example, home appliances such as air conditioners installed in the facility 3. Here, the one or more loads 37 are devices that operate using electricity.

[0083] [3.Action]

[0084] Below, use Figure 6 Next, the operation of the emission amount calculation system 100 according to the embodiment will be described. Figure 6 1 is a sequence diagram showing an example of the operation of the emission amount calculation system 100 according to the embodiment. As already described, in the embodiment, the emission amount calculation system 100 is implemented by the second server 12. Figure 6 In the illustrated example, the second calculation unit 103 of the second server 12 is described assuming that the second calculation unit 103 calculates the carbon dioxide emission amount of the electric vehicle 2 by the above-mentioned second method.

[0085] First, the energy management system 35 periodically sends charging information to the first server 11 via the network N1 (S1). When the first server 11 receives the charging information, it sends the charging information to the second server 12 via the network N1 (S2). As a result, the second communication unit 121 (acquisition unit 101) of the second server 12 periodically acquires the charging information, that is, at predetermined intervals (S3).

[0086] Furthermore, the electric vehicle 2 regularly transmits the power consumption of the battery 22 to the second server 12 via the network N1 (S4). Thus, the second communication unit 121 (acquisition unit 101) of the second server 12 regularly acquires the power consumption, that is, at predetermined time intervals (S5).

[0087] Next, the first calculation unit 102 of the second server 12 calculates the ratio of the charging energy performed with the first electric power to the charging energy of the storage battery 22 of the electric vehicle 2 based on the acquired charging information (S6). Then, the second calculation unit 103 of the second server 12 calculates the emission of carbon dioxide in the electric vehicle 2 based on the ratio calculated by the first calculation unit 102, the first emission coefficient, the second emission coefficient, and the consumed electric energy acquired by the second communication unit 121 (acquisition unit 101) (S7). The calculated emission of carbon dioxide is stored in the second storage unit 123 of the second server 12.

[0088] Afterwards, the second communication unit 121 (output unit 104) of the second server 12 sends (outputs) the carbon dioxide emissions calculated by the second calculation unit 103 to an external system (such as the electric vehicle 2, a server operated by a company that manufactures the electric vehicle 2, or an information terminal owned by a user of the electric vehicle 2, etc.) periodically or based on a request from the external system.

[0089] [4. Advantages]

[0090] The advantages of the emission calculation method and emission calculation system 100 according to the embodiment are described below. As described above, the battery 22 of the electric vehicle 2 is not necessarily charged only with electricity from renewable energy, but may also be charged with electricity from the grid power. Therefore, if it is not known what source of electricity is used to charge the battery 22 of the electric vehicle 2, there is a problem that the carbon dioxide emissions when the electric vehicle 2 is traveling cannot be obtained with high accuracy.

[0091] Therefore, in the emission amount calculation method and the emission amount calculation system 100 according to the embodiment, the charging information about the charging of the storage battery 22 of the electric vehicle 2 by the first electric power derived from the renewable energy and the charging of the storage battery 22 by the second electric power derived from the grid power is acquired. Then, the emission amount calculation method and the emission amount calculation system 100 according to the embodiment calculate the ratio of the charging electric energy by the first electric power to the charging electric energy of the storage battery 22 based on the charging information. And, the emission amount calculation method and the emission amount calculation system 100 according to the embodiment calculate the emission of carbon dioxide in the electric vehicle 2 based on the calculated ratio, the first emission coefficient which is the emission coefficient of carbon dioxide for the renewable energy, and the second emission coefficient which is the emission coefficient of carbon dioxide for the grid power.

[0092] Therefore, in the emission calculation method and emission calculation system 100 involved in the embodiment, the carbon dioxide emissions are calculated based on the source of electricity used to charge the battery 22 of the electric vehicle 2, so there is an advantage that the carbon dioxide emissions when the electric vehicle 2 is traveling can be easily and accurately calculated.

[0093] In particular, the second method of the second calculation unit 103 calculates the carbon dioxide emission by further referring to the electric energy actually consumed by the electric vehicle 2 when it is actually running. Therefore, it is easy to obtain the carbon dioxide emission when the electric vehicle 2 is running with higher accuracy.

[0094] Furthermore, since the amount of carbon dioxide emissions when the electric vehicle 2 is running can be obtained with high accuracy, there is also an advantage that it is easy to generate incentives for promoting the popularization of electric vehicles 2 and investments related to the introduction of renewable energy. Furthermore, since the amount of carbon dioxide emissions when the electric vehicle 2 is running can be obtained with high accuracy, there is also an advantage that the efforts of enterprises to reduce carbon dioxide emissions can be easily reflected in the degree of reduction in carbon dioxide emissions.

[0095] [5. Modifications]

[0096] Although the embodiments have been described above, the present invention is not limited to the above-described embodiments.

[0097] For example, in the above embodiment, the second communication unit 121 (acquisition unit 101) of the second server 12 acquires charging information from the energy management system 35 via the first server 11, but the present invention is not limited thereto. For example, the second communication unit 121 of the second server 12 may also acquire charging information directly from the energy management system 35 via the network N1 instead of the first server 11.

[0098] In addition, in the above-mentioned embodiment, the carbon dioxide emissions are calculated by the second server 12 as the management system 200 that manages the electric vehicle 2, but it is not limited to this. For example, the carbon dioxide emissions can also be calculated by the electric vehicle 2. That is, the emission calculation system 100 can be implemented by the second server 12 as the management system 200, and can also be implemented by the electric vehicle 2. In addition, with regard to the emission calculation system 100, a part of it can also be implemented by the second server 12, and the rest can be implemented by the electric vehicle 2. In other words, the emission calculation system 100 can also be configured to be distributed in the electric vehicle 2 and the management system 200 (second server 12), respectively.

[0099] In addition, in the above embodiment, the acquisition unit 101 (second communication unit 121) periodically acquires the charging information, but the present invention is not limited thereto. For example, the acquisition unit 101 may acquire the charging information irregularly in response to a request from a user of the emission amount calculation system 100. In this case, the output unit 104 outputs the carbon dioxide emission irregularly.

[0100] In addition, in the above embodiment, the first power derived from renewable energy is the power generated by the solar power generation system 34, but it is not limited to this. For example, the first power may also be power derived from other renewable energy sources such as wind power, geothermal energy, hydropower, or biomass. In this way, when the first power is power derived from other renewable energy sources different from sunlight, it is sufficient to appropriately change the first emission coefficient according to the type of renewable energy. In other words, the first emission coefficient may also be updated according to the type of the first power.

[0101] In addition, even if the type of the first power remains the same but the emission factor disclosed by the operator of the power source has changed, the first emission factor may be changed. In this case, since the carbon dioxide emission amount can be calculated using the latest first emission factor, it is expected that the accuracy of calculating the carbon dioxide emission amount will be improved.

[0102] In addition, similar to the first emission coefficient, the second emission coefficient can also be updated according to the type of the second power. That is, if there is a case where the power supplied from the power system 4 corresponding to the supply source of the second power is composed only of power derived from fossil energy such as oil, coal, or natural gas, there is also a case where a part of the power includes power derived from renewable energy. Therefore, the second emission coefficient can be changed according to the composition of the power supplied from the power system 4. Therefore, the second emission coefficient can also be updated according to the type of the second power, in other words, according to the electric power operator operating the power system 4.

[0103] In addition, even if the same electric power company operates the electric power system 4 but the emission factor disclosed by the electric power company has changed, the second emission factor can be changed. In this case, since the carbon dioxide emission amount can be calculated using the latest second emission factor, it is expected that the accuracy of calculating the carbon dioxide emission amount will be improved.

[0104] In addition, the emission amount calculation method and emission amount calculation system 100 involved in the above-mentioned embodiment are not limited to application to carbon dioxide, and can also be applied to greenhouse gases other than carbon dioxide. That is, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 (second server 12) that manages the electric vehicle 2 is used to obtain charging information related to the charging of the battery 22 of the electric vehicle 2 with the first power derived from renewable energy and the charging of the battery 22 with the second power derived from the system power. In addition, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 is used to calculate the ratio of the charging energy performed with the first power to the charging energy of the battery 22 based on the charging information. In addition, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 is used to calculate the emission of greenhouse gases in the electric vehicle 2 based on the above ratio, the first emission coefficient, which is the emission coefficient of greenhouse gases for renewable energy, and the second emission coefficient, which is the emission coefficient of greenhouse gases for system power. In addition, in the emission amount calculation method, the emission of greenhouse gases is output.

[0105] In addition, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 (second server 12) that manages the electric vehicle 2 is used to obtain charging information related to charging of the storage battery 22 of the electric vehicle 2 with the first power derived from renewable energy and charging of the storage battery 22 with the second power derived from the grid power, and electric energy consumed by the running of the electric vehicle 2. In addition, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 is used to calculate the ratio of the charging electric energy with the first power to the charging electric energy of the storage battery 22 based on the charging information. In addition, in the emission amount calculation method, at least one of the electric vehicle 2 and the management system 200 is used to calculate the emission of greenhouse gas in the electric vehicle 2 based on the above ratio, the first emission coefficient that is an emission coefficient of greenhouse gas for renewable energy, the second emission coefficient that is an emission coefficient of greenhouse gas for grid power, and the electric energy consumed by the running of the electric vehicle 2. In addition, in the emission amount calculation method, the emission of greenhouse gas is output.

[0106] In addition, the emission calculation system may be implemented by multiple devices (e.g., multiple servers) or as a single device (e.g., a single server). When the emission calculation system is implemented by multiple devices, the components (particularly functional components) of the emission calculation system may be arbitrarily distributed to multiple devices.

[0107] In addition, the communication method between the devices in the above-mentioned embodiment is not particularly limited. In addition, in the communication between the devices, it is also possible to pass through a relay device (broadband router, etc.) not shown in the figure.

[0108] In the above-mentioned embodiment, the process executed by a specific processing unit may be executed by another processing unit. In addition, the order of a plurality of processes may be changed, or a plurality of processes may be executed in parallel.

[0109] In the above embodiments, each component may be implemented by executing a software program suitable for each component. Each component may be implemented by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0110] In addition, each structural element can also be implemented by hardware. For example, each structural element can also be a circuit (or integrated circuit). These circuits can constitute a circuit as a whole, or they can be different circuits. In addition, these circuits can be general circuits or dedicated circuits.

[0111] In addition, the overall or specific aspects of the present invention may also be implemented by a system, device, method, integrated circuit, computer program, or computer-readable CD-ROM or other recording medium. In addition, the present invention may also be implemented by any combination of a system, device, method, integrated circuit, computer program, and recording medium.

[0112] For example, the present invention may be implemented as an information processing method executed by a computer of the emission calculation system of the above-mentioned embodiment. The present invention may also be implemented as a program (computer program product) for causing a computer to execute these information processing methods. In addition, the present invention may also be implemented as a computer-readable non-transitory recording medium having such a program recorded thereon.

[0113] In addition, the present invention also includes various modifications that can be conceived by those skilled in the art to the embodiments, or embodiments achieved by arbitrarily combining the structural elements and functions in the embodiments without departing from the gist of the present invention.

[0114] (Summarize)

[0115] As described above, in the emission amount calculation method according to the first embodiment, the charging information about the charging of the storage battery 22 of the electric vehicle 2 by the first power derived from the renewable energy and the charging of the storage battery 22 by the second power derived from the grid power is acquired using at least one of the electric vehicle 2 and the management system 200 (second server 12) for managing the electric vehicle 2. In addition, in the emission amount calculation method, the ratio of the charging electric energy by the first power to the charging electric energy of the storage battery 22 is calculated based on the charging information using at least one of the electric vehicle 2 and the management system 200. In addition, in the emission amount calculation method, the emission of carbon dioxide in the electric vehicle 2 is calculated based on the above ratio, the first emission coefficient which is the emission coefficient of carbon dioxide for the renewable energy, and the second emission coefficient which is the emission coefficient of carbon dioxide for the grid power using at least one of the electric vehicle 2 and the management system 200. In addition, in the emission amount calculation method, the emission of carbon dioxide is output.

[0116] In such an emission calculation method, the carbon dioxide emission is calculated based on the source of power used to charge the battery 22 of the electric vehicle 2. Therefore, there is an advantage that the carbon dioxide emission when the electric vehicle 2 is traveling can be easily and accurately determined.

[0117] In addition, in the emission amount calculation method according to the second embodiment, at least one of the electric vehicle 2 and the management system 200 (second server 12) for managing the electric vehicle 2 is used to obtain charging information about charging of the storage battery 22 of the electric vehicle 2 with the first power derived from renewable energy and charging of the storage battery 22 with the second power derived from the grid power, and electric energy consumed by the running of the electric vehicle 2. In addition, in the emission amount calculation method, the ratio of the charging electric energy with the first power to the charging electric energy of the storage battery 22 is calculated based on the charging information using at least one of the electric vehicle 2 and the management system 200. In addition, in the emission amount calculation method, the emission of carbon dioxide in the electric vehicle 2 is calculated based on the above ratio, the first emission coefficient which is an emission coefficient of carbon dioxide for renewable energy, the second emission coefficient which is an emission coefficient of carbon dioxide for grid power, and the electric energy consumed by the running of the electric vehicle 2 using at least one of the electric vehicle 2 and the management system 200. In addition, in the emission amount calculation method, the emission of carbon dioxide is output.

[0118] In such an emission calculation method, the carbon dioxide emission is calculated based on the source of power used to charge the battery 22 of the electric vehicle 2. Therefore, there is an advantage that the carbon dioxide emission when the electric vehicle 2 is traveling can be easily and accurately determined.

[0119] In addition, the emission amount calculation method according to the third aspect is, in the first aspect or the second aspect, further performing the following processing: acquiring charging information at predetermined time intervals; and outputting the emission amount of carbon dioxide at predetermined time intervals.

[0120] In such an emission amount calculation method, the emission amount of carbon dioxide when the electric vehicle 2 travels at every predetermined time can be grasped, and therefore there is an advantage that convenience can be easily improved.

[0121] In addition, in the emission amount calculation method according to the fourth embodiment, in any one of the first to third embodiments, the first electric power is electric power generated by the solar power generation system 34 .

[0122] Such an emission amount calculation method has an advantage in that the emission amount of carbon dioxide is calculated based on charging the storage battery 22 of the electric vehicle 2 using the electric power generated by solar power.

[0123] In addition, in the emission amount calculation method according to the fifth aspect, in any one of the first to fourth aspects, the first emission coefficient is updated according to the type of the first power.

[0124] Such an emission amount calculation method has an advantage that the accuracy of calculating the emission amount of carbon dioxide can be expected to be further improved by calculating the emission amount of carbon dioxide using the first emission coefficient corresponding to the type of the first power.

[0125] Furthermore, in the emission amount calculation method according to a sixth aspect, in any one of the first to fifth aspects, the second emission coefficient is updated according to the type of the second power.

[0126] Such an emission amount calculation method has an advantage that the accuracy of calculating the emission amount of carbon dioxide can be expected to be further improved by calculating the emission amount of carbon dioxide using the second emission coefficient corresponding to the type of the second power.

[0127] Furthermore, the program according to the seventh aspect causes one or more processors to execute the emission amount calculation method according to any one of the first aspect to the sixth aspect.

[0128] Such a program calculates the amount of carbon dioxide emissions based on the source of electricity used to charge the battery 22 of the electric vehicle 2 , and therefore has the advantage of being able to easily and accurately determine the amount of carbon dioxide emissions when the electric vehicle 2 is traveling.

[0129] In addition, the emission amount calculation system 100 according to the eighth aspect is an emission amount calculation system 100 provided in either the electric vehicle 2 or the management system 200 for managing the electric vehicle 2. The emission amount calculation system 100 includes an acquisition unit 101 (second communication unit 121), a first calculation unit 102 (second processing unit 122), a second calculation unit 103 (second processing unit 122), and an output unit 104 (second communication unit 121). The acquisition unit 101 acquires charging information about charging of the storage battery 22 of the electric vehicle 2 with the first power derived from renewable energy and charging of the storage battery 22 with the second power derived from grid power. The first calculation unit 102 calculates the ratio of the charging electric energy with the first power to the charging electric energy of the storage battery 22 based on the charging information. The second calculation unit 103 calculates the emission of carbon dioxide in the electric vehicle 2 based on the ratio, the first emission coefficient which is the emission coefficient of carbon dioxide for renewable energy, and the second emission coefficient which is the emission coefficient of carbon dioxide for grid power. The output unit 104 outputs the emission of carbon dioxide.

[0130] Such emission calculation system 100 calculates the carbon dioxide emission based on the source of power used to charge battery 22 of electric vehicle 2, and therefore has the advantage of being able to easily and accurately determine the carbon dioxide emission when electric vehicle 2 is traveling.

[0131] In addition, the emission amount calculation system 100 according to the ninth embodiment is an emission amount calculation system 100 provided in either the electric vehicle 2 or the management system 200 for managing the electric vehicle 2. The emission amount calculation system 100 includes an acquisition unit 101 (second communication unit 121), a first calculation unit 102 (second processing unit 122), a second calculation unit 103 (second processing unit 122), and an output unit 104 (second communication unit 121). The acquisition unit 101 acquires charging information related to charging of the storage battery 22 of the electric vehicle 2 with the first electric power derived from renewable energy and charging of the storage battery 22 with the second electric power derived from the system power, and electric energy consumed by traveling of the electric vehicle 2. The first calculation unit 102 calculates the ratio of the charging electric energy with the first electric power to the charging electric energy of the storage battery 22 based on the charging information. The second calculation unit 103 calculates the amount of carbon dioxide emitted from the electric vehicle 2 based on the above ratio, the first emission coefficient of carbon dioxide emitted from renewable energy, the second emission coefficient of carbon dioxide emitted from grid power, and the electric energy consumed by the running of the electric vehicle 2. The output unit 104 outputs the amount of carbon dioxide emitted.

[0132] Such emission calculation system 100 calculates the carbon dioxide emission based on the source of power used to charge battery 22 of electric vehicle 2, and therefore has the advantage of being able to easily and accurately determine the carbon dioxide emission when electric vehicle 2 is traveling.

[0133] Description of Reference Numerals

[0134] 100: emission amount calculation system; 101: acquisition unit; 102: first calculation unit; 103: second calculation unit; 104: output unit; 2: electric vehicle; 200: management system; 22: storage battery; 34: solar power generation system.

Claims

1. A method for calculating emissions, performing the following processing: Using at least one of an electric vehicle and a management system for managing the electric vehicle, acquiring charging information related to charging of a storage battery of the electric vehicle with first electric power derived from renewable energy and charging of the storage battery with second electric power derived from system power; using at least one of the electric vehicle and the management system, calculating a ratio of charging energy performed with the first electric power to charging energy of the storage battery based on the charging information; Using at least one of the electric vehicle and the management system, calculating the amount of carbon dioxide emissions in the electric vehicle based on the ratio, a first emission coefficient of carbon dioxide emissions for the renewable energy, and a second emission coefficient of carbon dioxide emissions for the system power; and The carbon dioxide emissions are output.

2. A method for calculating emissions, performing the following processing: Using at least one of an electric vehicle and a management system for managing the electric vehicle, obtaining charging information related to charging of a storage battery of the electric vehicle with first electric power derived from renewable energy and charging of the storage battery with second electric power derived from system power, and electric energy consumed by traveling of the electric vehicle; using at least one of the electric vehicle and the management system, calculating a ratio of charging energy performed with the first electric power to charging energy of the storage battery based on the charging information; Using at least one of the electric vehicle and the management system, calculating the amount of carbon dioxide emissions in the electric vehicle based on the ratio, a first emission coefficient of carbon dioxide emissions for the renewable energy, a second emission coefficient of carbon dioxide emissions for the system power, and electric energy consumed by the running of the electric vehicle; and The carbon dioxide emissions are output.

3. The method for calculating the emission amount according to claim 1 or 2, further comprising: Acquiring the charging information at a prescribed time interval; and The emission amount of the carbon dioxide is outputted at every predetermined time period.

4. The method for calculating emissions according to claim 1 or 2, wherein: The first electric power is electric power generated by a solar power generation system.

5. The method for calculating emissions according to claim 1 or 2, wherein: The first emission coefficient is updated according to the type of the first power.

6. The method for calculating emissions according to claim 1 or 2, wherein: The second emission coefficient is updated according to the type of the second power.

7. A program for causing one or more processors to execute the emission amount calculation method according to claim 1 or 2.

8. An emission amount calculation system, the emission amount calculation system being provided to either an electric vehicle or a management system for managing the electric vehicle, the emission amount calculation system comprising: an acquisition unit that acquires charging information related to charging of a storage battery of the electric vehicle with first electric power derived from renewable energy and charging of the storage battery with second electric power derived from grid power; a first calculation unit that calculates a ratio of charging energy performed with the first electric power to charging energy of the storage battery based on the charging information; a second calculation unit that calculates the emission amount of carbon dioxide in the electric vehicle based on the ratio, a first emission coefficient of carbon dioxide for the renewable energy, and a second emission coefficient of carbon dioxide for the system power; and An output unit outputs the emission amount of the carbon dioxide.

9. An emission amount calculation system, the emission amount calculation system being provided to either an electric vehicle or a management system for managing the electric vehicle, the emission amount calculation system comprising: an acquisition unit that acquires charging information related to charging of a storage battery of the electric vehicle with first electric power derived from renewable energy and charging of the storage battery with second electric power derived from grid power, and electric energy consumed by traveling of the electric vehicle; a first calculation unit that calculates a ratio of charging energy performed with the first electric power to charging energy of the storage battery based on the charging information; a second calculation unit that calculates the amount of carbon dioxide emissions from the electric vehicle based on the ratio, a first emission coefficient of carbon dioxide emissions for the renewable energy, a second emission coefficient of carbon dioxide emissions for the grid power, and electric energy consumed by the running of the electric vehicle; as well as An output unit outputs the emission amount of the carbon dioxide.

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