Work machine management system and work machine management method

Abstract

To provide a work machine management system and management method for grasping whether or not how much greenhouse gas is emitted even when utilizing a work machine having a battery.SOLUTION: In a work machine management system, a processor of an in-vehicle controller provided in a work machine 2 comprises: a power data acquisition unit for acquiring power data indicating supply power, which is power supplied from a power source in order to charge a battery mounted on the work machine 2; a basic unit data acquisition unit for acquiring unit data, which is a greenhouse gas emission amount generated when the power source generates a certain amount of power; an emission amount calculation unit for calculating an upstream emission amount, which is a supply power greenhouse gas emission amount, on the basis of the power data and the unit data; and output unit for outputting the calculated upstream emission amount.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a work machine management system and a work machine management method. [Background technology]

[0002] Patent Document 1 discloses a technique for charging a vehicle battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2022-510390 Summary of the Invention [Problem to be solved by the invention]

[0004] From the viewpoint of preventing global warming, it is desirable to suppress the emission of greenhouse gases. In order to prevent global warming, a work machine equipped with a battery has been proposed in the technical field related to work machines. When the electricity used by the work machine is generated using fossil fuel energy, the use of a work machine equipped with a battery may result in the emission of greenhouse gases. Even when a work machine equipped with a battery is used, it is necessary to know the extent of greenhouse gas emissions.

[0005] An object of the present disclosure is to ascertain the extent to which greenhouse gases are being emitted even when a work machine equipped with a battery is used. [Means for solving the problem]

[0006] According to the present disclosure, there is provided a work machine management system including a processor, which acquires power data indicating supplied power, which is power supplied from a power source to charge a battery mounted on the work machine, acquires unit data indicating greenhouse gas emissions generated when the power source generates a certain amount of power, calculates upstream emissions, which are greenhouse gas emissions of the supplied power, based on the power data and the unit data, and outputs the upstream emissions. Effect of the Invention

[0007] According to the present disclosure, even when a work machine having a battery is used, it is possible to grasp the extent to which greenhouse gases are being emitted. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a management system for a work machine according to a first embodiment. [Diagram 2] FIG. 2 is a diagram showing a shovel according to the first embodiment. [Diagram 3] FIG. 3 is a diagram showing a control system for the shovel according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing the relationship between the power station and the charging station according to the first embodiment. [Diagram 5] FIG. 5 is a block diagram showing an in-vehicle controller according to the first embodiment. [Figure 6] FIG. 6 is a diagram showing the relationship between the basic unit and time according to the first embodiment. [Figure 7] FIG. 7 is a flowchart showing a method for calculating the amount of CO2 emissions due to charging of the battery according to the first embodiment. [Figure 8] FIG. 8 is a diagram showing the relationship between the power station and the charging station according to the second embodiment. [Figure 9] FIG. 9 is a diagram showing ratio data of a plurality of powers according to the second embodiment. [Figure 10]FIG. 10 is a diagram showing the relationship between each of a plurality of electric powers and the unit consumption according to the second embodiment. [Figure 11] FIG. 11 is a flowchart showing a method for calculating the amount of CO2 emissions due to charging of the battery according to the second embodiment. [Figure 12] FIG. 12 is a view of the shovel according to the third embodiment as viewed from above. [Figure 13] FIG. 13 is a diagram showing the relationship between the power station and the charging station according to the third embodiment. [Figure 14] FIG. 14 is a diagram for explaining a method for acquiring basic unit data according to the fourth embodiment. [Figure 15] FIG. 15 is a diagram showing a shovel according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiment. The components of the embodiments described below can be appropriately combined. In addition, some components may not be used.

[0010] [First embodiment] A first embodiment will be described.

[0011] <Overview of the management system> Fig. 1 is a diagram showing a management system 1 for a work machine 2 according to this embodiment. The management system 1 manages the work machines 2 that operate at a work site 3. In this embodiment, the work machines 2 are electric work machines that are powered by a battery and an electric actuator. There are multiple work machines 2 at the work site 3. In the example shown in Fig. 1, the work machines 2 present at the work site 3 include a shovel 2A, a bulldozer 2B, and a dump truck 2C.

[0012] In this embodiment, no operator boards the work machine 2. The work machine 2 is remotely operated. A remote operation room 4 is installed outside the work machine 2. The remote operation room 4 is installed in a remote location from the work site 3. An information terminal 5 and a remote operation device 6 for remotely operating the work machine 2 are each disposed in the remote operation room 4. The information terminal 5 and the remote operation device 6 are each present outside the work machine 2. The information terminal 5 includes a computer system disposed in the remote operation room 4.

[0013] The remote control device 6 is operated by an operator in the remote control room 4. When operated by the operator, the remote control device 6 generates an operation signal for remotely operating the work machine 2. The operation signal generated in the remote control device 6 is input to the information terminal 5. The information terminal 5 generates a remote operation command based on the operation signal from the remote control device 6. The information terminal 5 transmits the remote operation command to the work machine 2 via the communication system 7.

[0014] The work machine 2 operates based on remote operation commands transmitted from an information terminal 5 located outside the work machine 2. At least one of the work machine 2 and the work site 3 is provided with a camera that acquires image data of the work site 3. The image data of the work site 3 is transmitted to the information terminal 5 via a communication system 7 and displayed on a display device of the information terminal 5. The operator can operate the remote operation device 6 while checking the image data of the work site 3.

[0015] The communication system 7 may include a public communication line or a specific communication line. Examples of the communication system 7 include a mobile phone communication network or a satellite communication network. The communication system 7 may include the Internet or a local area network.

[0016] The management system 1 has a management server 8. The management server 8 includes a computer system. The management server 8 can communicate with the work machine 2 via a communication system 7. The management server 8 collects operation data of the work machine 2. The management server 8 outputs control commands to the work machine 2.

[0017] <Work machinery> 2 is a view showing a shovel 2A according to this embodiment from the left front. The shovel 2A has a revolving body 9, a traveling body 10, a work implement 11, and a work implement cylinder 12.

[0018] The rotating body 9 is the vehicle body of the shovel 2A. The running body 10 is a traveling device of the shovel 2A. The running body 10 supports the rotating body 9. The rotating body 9 is supported by the running body 10 so as to be able to rotate. The rotating body 9 is disposed above the running body 10. The running body 10 runs while supporting the rotating body 9. The running body 10 has a pair of tracks 10A. The shovel 2A runs as the tracks 10A rotate.

[0019] The work implement 11 is connected to the front of the rotating structure 9. The work implement 11 includes a boom 11A connected to the front of the rotating structure 9, an arm 11B connected to the boom 11A, and a bucket 11C connected to the arm 11B. The work implement cylinder 12 includes a boom cylinder 12A that operates the boom 11A, an arm cylinder 12B that operates the arm 11B, and a bucket cylinder 12C that operates the bucket 11C.

[0020] <Control system> 3 is a diagram showing a control system 30 of the shovel 2A according to this embodiment. The shovel 2A has the control system 30. The control system 30 has a battery 31, a charging device 32, a DC / DC converter 33, an inverter 34, an electric motor 35, a hydraulic pump 36, a main valve 37, a hydraulic actuator 38, an on-board controller 40, and a communication device 43.

[0021] The battery 31 is mounted on the revolving body 9. The battery 31 includes a secondary battery. In this embodiment, the battery 31 includes a lithium ion battery (LiB).

[0022] The charging device 32 is connected to a charging station 23 provided outside the work machine 2. The charging station 23 charges the battery 31 using a commercial power source. The charging device 32 includes an AC / DC converter. The charging device 32 charges the battery 31 with power supplied from the charging station 23.

[0023] The DC / DC converter 33 boosts the voltage from the battery 31. The DC / DC converter 33 supplies a direct current from the battery 31 to the inverter .

[0024] The inverter converts the direct current from the DC / DC converter 33 into a three-phase alternating current and supplies the three-phase alternating current to the electric motor 35. The electric motor 35 is driven based on the three-phase alternating current supplied from the inverter .

[0025] The electric motor 35 is a power source of the work machine 2. The electric motor 35 is an example of an electric actuator in this embodiment. The battery 31 supplies power to the electric motor 35. The electric motor 35 is driven based on the power supplied from the battery 31.

[0026] The hydraulic pump 36 is driven by the electric motor 35. The hydraulic pump 36 discharges hydraulic oil. The hydraulic oil discharged from the hydraulic pump 36 is supplied to a hydraulic actuator 38 via a main valve 37. The hydraulic actuator 38 of the excavator 2A includes the work machine cylinder 12.

[0027] It should be noted that an electric actuator may be provided in the excavator 2A instead of the hydraulic actuator 38. The work machine cylinder 12 may be an electric cylinder. When an electric actuator is provided in the excavator 2A instead of the hydraulic actuator 38, the hydraulic pump 36 and the main valve 37 are omitted.

[0028] The vehicle controller 40 includes a computer system. The communication device 43 is connected to the vehicle controller 40. The communication device 43 communicates with the management server 8 wirelessly.

[0029] <Supplied power> 4 is a diagram showing the relationship between the power plant 20 and the charging station 23 according to this embodiment. Electric power generated in the power plant 20 is supplied to the charging station 23 via a power transmission facility 24. The charging station 23 charges the battery 31 using the electric power supplied from the power transmission facility 24. The charging station 23 and the shovel 2A are connected via a cable 25. The charging station 23 supplies electric power to the shovel 2A via the cable 25. The charging station 23 may be present at the work site 3 or outside the work site 3.

[0030] The electric power supplied from the charging station 23 to the work machine 2 is electric power for driving at least the electric motor 35. In the following description, the electric power supplied from the power plant 20 to the work machine 2 for driving at least the electric motor 35 will be referred to as supplied electric power as appropriate. The power plant 20 includes a power source that generates the supply electric power.

[0031] In this embodiment, the supply power from the charging station 23 is used to charge the battery 31. In this embodiment, the power supplied from the charging station 23 to the work machine 2 is power for charging the battery 31 mounted on the work machine 2. Supply power is supplied from the charging station 23 to the battery 31. In this embodiment, the supply power is supplied from the power plant 20 to the battery 31 in order to charge the battery 31. With the battery 31 mounted on the work machine 2, supply power is supplied from the power plant 20 to the battery 31. The electric motor 35 is driven by the power supplied from the battery 31.

[0032] The management system 1 calculates the amount of greenhouse gas emissions. Examples of greenhouse gases include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and fluorocarbons. In this embodiment, the management system 1 calculates the amount of CO2 emissions as the amount of greenhouse gas emissions. The management system 1 calculates the upstream emissions, which are the CO2 emissions of the supply power procured from the power plant 20. The upstream emissions are the CO2 emissions generated in the generation of the supply power in the power plant 20.

[0033] For example, if the electricity supplied is generated using non-renewable energy, the upstream emissions are large. If the electricity supplied is generated using renewable energy, the upstream emissions are small. Non-renewable energy refers to energy produced from resources with finite reserves. Non-renewable energy includes fossil fuel energy such as oil, coal, and natural gas. Non-renewable energy also includes nuclear energy that uses uranium. Note that upstream emissions from nuclear energy are smaller than upstream emissions from fossil fuel energy. Renewable energy refers to energy that is always present in nature. Renewable energy includes natural energy such as solar, wind, and hydroelectric power.

[0034] In this embodiment, the in-vehicle controller 40 calculates the upstream emissions, which are the CO2 emissions of the supplied power, based on power data indicating the supply power supplied from the charging station 23 and unit consumption data indicating the unit consumption, which is the amount of CO2 emissions generated when the power plant 20 generates a unit amount of power. In this embodiment, the supply power includes the amount of power [kWh] for charging the battery 31. The unit consumption includes the amount of CO2 emissions [kgCO2 / kWh] generated when the power plant 20 generates a unit amount of power.

[0035] The power data indicating the supplied power is primary data that the management system 1 can acquire from the charging station 23. The unit consumption data indicating the unit consumption is secondary data provided to the management system 1 from an external organization. Examples of the external organization that provides the secondary data to the management system 1 include a power transmission company that manages the power plant 20 or a government organization. In this embodiment, the power transmission company provides the unit consumption data to the on-board controller 40 via the charging station 23. The on-board controller 40 acquires the unit consumption data via the charging station 23 and the cable 25.

[0036] <In-vehicle controller> FIG. 5 is a block diagram showing the on-vehicle controller 40 according to the present embodiment. Each of the management server 8 and the on-vehicle controller 40 includes a computer system. The on-vehicle controller 40 is disposed in the excavator 2A. The on-vehicle controller 40 has a processor 48 such as a CPU (Central Processing Unit), a main memory 49 including a non-volatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory), a storage 50, and an interface 51 including an input / output circuit. The functions of the on-vehicle controller 40 are stored in the storage 50 as a computer program. The processor 48 reads the computer program from the storage 50, expands it in the main memory 49, and executes processing according to the computer program. The computer program may be distributed from the management server 8 via a network.

[0037] Similarly, the management server 8 includes a processor, a main memory, a storage, and an interface.

[0038] In this embodiment, an input device 13 and an output device 14 are connected to the management server 8. The input device 13 generates input data by being operated by, for example, an administrator. The input data generated by the input device 13 is transmitted to the management server 8. Examples of the input device 13 include a touch panel, a computer keyboard, and an audio input device. The output device 14 outputs output data. Examples of the output device 14 include a display device and an audio output device. The display device displays display data as output data. The audio output device outputs audio data as output data.

[0039] The processor 48 has an electric power data acquisition unit 48A, a basic unit data acquisition unit 48B, an emission amount calculation unit 48C, and an output unit 48D.

[0040] The power data acquiring unit 48A acquires power data indicating the supply power, which is power supplied to drive the electric motor 35. In this embodiment, the power data acquiring unit 48A acquires the amount of power [kWh] for charging the battery 31. The power data acquiring unit 48A can calculate the amount of power [kWh] for charging the battery 31 by, for example, monitoring the voltage applied to the battery 31 from the charging station 23, the current supplied to the battery 31 from the charging station 23, and the charging time of the battery 31 by the charging station 23.

[0041] The basic unit data acquiring unit 48B acquires basic unit data indicating a basic unit, which is the amount of CO2 emissions generated when a unit amount of power is generated. The basic unit includes CO2 emissions [kgCO2 / kWh] generated in generating a unit amount of power for charging the battery 31. In this embodiment, the power transmission company provides the basic unit data to the in-vehicle controller 40 via the charging station 23. The basic unit data acquiring unit 48B acquires the basic unit data via the charging station 23.

[0042] The emission calculation unit 48C calculates the upstream emission amount [kg CO2], which is the CO2 emission amount of the supplied power, based on the power data acquired by the power data acquisition unit 48A and the basic unit data acquired by the basic unit data acquisition unit 48B. In this embodiment, the emission calculation unit 48C calculates the upstream emission amount [kg CO2] of CO2 generated in the generation of the supplied power in the power plant 20 by multiplying the amount of power [kWh] for charging the battery 31 by the basic unit [kg CO2 / kWh]. That is, the emission calculation unit 48C calculates the upstream emission amount of CO2 by performing an operation of [amount of power x basic unit].

[0043] FIG. 6 is a diagram showing the relationship between the unit consumption and time according to this embodiment. As shown in FIG. 6, the unit consumption may vary based on, for example, the power generation conditions or the power generation environment of the power plant 20. The unit consumption data provided to the vehicle controller 40 may be updated every unit time. The unit consumption data provided to the vehicle controller 40 may be updated, for example, every second, every minute, or every hour. The discharge amount calculation unit 48C may calculate the upstream discharge amount per unit time during the charging period of the battery 31. The discharge amount calculation unit 48C may calculate the upstream discharge amount per second every second, the upstream discharge amount per minute every minute, or the upstream discharge amount per hour every hour. The discharge amount calculation unit 48C may calculate the upstream discharge amount during the charging period of the battery 31. That is, the discharge amount calculation unit 48C may calculate the total upstream discharge amount from the start to the end of charging the battery 31.

[0044] The output unit 48D outputs the upstream emission amount calculated by the emission amount calculation unit 48C. The output unit 48D outputs the upstream emission amount to the storage 50. The storage 50 has an emission amount memory unit 50A that stores the upstream emission amount. The upstream emission amount calculated by the emission amount calculation unit 48C is stored in the emission amount memory unit 50A. The output unit 48D outputs the upstream emission amount to the communicator 43. The communicator 43 transmits the upstream emission amount to the management server 8 via the communication system 7. The management server 8 causes the output device 14 to output the upstream emission amount. If the output device 14 includes a display device, the management server 8 causes the display device to display the upstream emission amount. Note that a report may be created based on the upstream emission amount transmitted to the management server 8. The output unit 48D may transmit the upstream emission amount to the information terminal 5 of the remote operation room 4. The information terminal 5 may output the upstream emission amount. If the information terminal 5 has a display device, the upstream emission amount may be displayed on the display device of the information terminal 5. In addition, in the case where an output device is provided on the shovel 2A, the output device provided on the shovel 2A may output the upstream discharge amount.

[0045] The output unit 48D may output the amount of power [kWh] for charging the battery 31. The amount of power for charging the battery 31 may be stored in the storage 50, transmitted to the management server 8, or output from the output device 14.

[0046] <Management method> 7 is a flowchart showing a method for calculating the amount of CO2 emissions due to charging the battery 31 according to this embodiment. When the charging station 23 and the shovel 2A are connected and charging of the battery 31 starts, the power data acquiring unit 48A acquires the amount of power per unit time supplied from the charging station 23 to the battery 31 (step SA1).

[0047] The basic unit data acquiring unit 48B acquires the basic unit updated for each unit time (step SA2).

[0048] The discharge amount calculation unit 48C multiplies the amount of power per unit time acquired in step SA1 by the basic unit acquired in step SA2 to calculate the amount of upstream discharge per unit time (step SA3).

[0049] The discharge amount calculation unit 48C integrates the upstream discharge amount per unit time from the start of charging to the present time (step SA4).

[0050] The discharge amount calculation unit 48C determines whether or not charging of the battery 31 has been completed (step SA5).

[0051] In step SA5, if it is determined that charging of the battery 31 has not been completed (step SA5: No), the process returns to step SA1, and the processes from step SA1 to step SA4 are performed.

[0052] In step SA6, when it is determined that the charging of the battery 31 is completed (step SA5: Yes), the discharge amount calculation unit 48C calculates the total upstream discharge amount due to the charging of the battery 31. The total upstream discharge amount is equal to the integrated value of the upstream discharge amount per unit time from the start of charging to the end of charging (step SA6).

[0053] The output unit 48D outputs the total upstream emission amount calculated in step SA6 (step SA7). The upstream emission amount may be stored in the emission amount storage unit 50A of the storage 50. The upstream emission amount may be transmitted to the management server 8. A report may be created based on the upstream emission amount.

[0054] The output unit 48D may output the total amount of power required to charge the battery 31. The amount of power required to charge the battery 31 may be stored in the storage 50, or may be transmitted to the management server 8. A report may be created based on the amount of power.

[0055] <Effects> As described above, according to this embodiment, the processor 48 acquires power data indicating the supply power, which is the power supplied to drive the electric motor 35 of the work machine 2. The processor 48 acquires unit data indicating the unit amount, which is the CO2 emission amount of a unit amount of power. The processor 48 calculates the upstream emission amount, which is the CO2 emission amount of the supply power, based on the power data and the unit data. The processor 48 outputs the upstream emission amount. This makes it possible to grasp how much greenhouse gas is being emitted by using the work machine 2 having the battery 31.

[0056] [Second embodiment] A second embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0057] FIG. 8 is a diagram showing the relationship between the power plant 20 and the charging station 23 according to this embodiment. In this embodiment, there are a plurality of power plants 20 that generate the power to be supplied to the excavator 2A. In the example shown in FIG. 8, the power plants 20 include a first power plant 20A, a second power plant 20B, and a third power plant 20C. In the following description, the first power plant 20A will be appropriately referred to as the first power source, the second power plant 20B will be appropriately referred to as the second power source, and the third power plant 20C will be appropriately referred to as the third power source.

[0058] The number of power plants 20 may be two, or any number of power plants equal to or greater than three.

[0059] The power transmission equipment 24 supplies at least one of a first power from a first power plant 20A (first power source), a second power from a second power plant 20B (second power source), and a third power from a third power plant 20C (third power source) to the charging station 23.

[0060] The basic unit of electricity [kgCO2 / kWh] generated by each of the multiple power plants 20 (20A, 20B, 20C) is different from one another. That is, the CO2 emissions [kgCO2 / kWh] from the first power source to generate a unit amount of electricity, the CO2 emissions [kgCO2 / kWh] from the second power source to generate a unit amount of electricity, and the CO2 emissions [kgCO2 / kWh] from the third power source to generate a unit amount of electricity are different from one another.

[0061] For example, if the first power plant 20A is a power plant that uses fossil fuel energy, the second power plant 20B is a power plant that uses nuclear energy, and the third power plant 20C is a power plant that uses renewable energy, the first power plant 20A emits a large amount of CO2, while the second power plant 20B and the third power plant 20C emit a small amount of CO2. No CO2 is generated during power generation at the second power plant 20B and the third power plant 20C. Note that when electricity is used to operate the second power plant 20B and the third power plant 20C, CO2 may be generated when generating the electricity used for the operation. In addition, raw materials such as uranium are required to generate electricity at the second power plant 20B, and CO2 may be generated when transporting the raw materials.

[0062] The power data acquired by the power data acquiring unit 48A includes the supply power generated by each of a plurality of power sources (a first power source, a second power source, and a third power source) having different basic units.

[0063] In the present embodiment, power attribute data is provided as secondary data to the in-vehicle controller 40 via the charging station 23. For example, a power transmission company provides power attribute data to the in-vehicle controller 40 via the charging station 23. The power data acquisition unit 48A acquires the attribute data via the charging station 23 and the cable 25.

[0064] The attribute data of the electricity includes a power generation method. The power generation methods include a power generation method using non-renewable energy and a power generation method using renewable energy. In this embodiment, attribute data indicating that the electricity was generated by a power generation method using fossil fuel energy is assigned to the electricity from the first power source. Attribute data indicating that the electricity was generated by a power generation method using nuclear energy is assigned to the electricity from the second power source. Attribute data indicating that the electricity was generated by a power generation method using renewable energy is assigned to the electricity from the third power source.

[0065] The power attribute data may include the name and location of the power plant 20 (20A, 20B, 20C).

[0066] In the present embodiment, ratio data indicating a relative ratio of the supply power supplied from each of the multiple power sources is provided as secondary data to the in-vehicle controller 40 via the charging station 23. For example, a power transmission company provides the ratio data of the supply power supplied from each of the multiple power sources to the in-vehicle controller 40 via the charging station 23. The power data acquisition unit 48A acquires the ratio data via the charging station 23 and the cable 25.

[0067] FIG. 9 is a diagram showing the ratio of a plurality of electric powers according to the present embodiment. As described above, the power transmission facility 24 supplies at least one of the first electric power from the first power source (first power plant 20A), the second electric power from the second power source (second power plant 20B), and the third electric power from the third power source (third power plant 20C) to the charging station 23. That is, the first electric power is supplied with a first ratio (A%), the second electric power is supplied with a second ratio (B%), and the third electric power is supplied with a third ratio (C%) to the charging station 23. Each of A, B, and C is a real number between 0 and 100. The sum of A, B, and C is 100. The supply electric power used to charge the battery 31 is composed of the first electric power of A%, the second electric power of B%, and the third electric power of C%.

[0068] As shown in FIG. 9, the first power, the second power, and the third power may fluctuate per unit time. The first ratio, the second ratio, and the third ratio may fluctuate per unit time. For example, when the third power is generated by a wind power generation method, the third ratio can be high when there is wind, but the third ratio is low when there is no wind. For example, when the third power is generated by a solar power generation method, the third ratio can be high when it is sunny, but the third ratio is low when it is cloudy, rainy, or at night.

[0069] The ratio data provided to the in-vehicle controller 40 is updated every unit time. The ratio data provided to the in-vehicle controller 40 may be updated, for example, every second, every minute, or every hour. The discharge amount calculation unit 48C can calculate the upstream discharge amount per unit time based on the updated ratio data during the charging period of the battery 31.

[0070] The unit data acquiring unit 48B acquires unit data of each of the multiple power sources (first power source, second power source, third power source). The unit data acquiring unit 48B also acquires attribute data of each of the multiple power sources (first power source, second power source, third power source).

[0071] The emission amount calculation unit 48C calculates the total value of the CO2 emission amounts calculated for each of the multiple power sources (the first power source, the second power source, and the third power source) as the upstream emission amount. That is, the emission amount calculation unit 48C performs the calculation of [Σ(electric energy×unit consumption)] to calculate the upstream emission amount.

[0072] FIG. 10 is a diagram showing the relationship between each of the multiple electric powers according to the present embodiment and the unit consumption. In the example shown in FIG. 10, the first electric power is the first electric energy [kWh] for charging the battery 31. The second electric power is the second electric energy [kWh] for charging the battery 31. The third electric power is the third electric energy [kWh] for charging the battery 31. When the first electric energy supplied from the first power plant 20A is a numerical value AAA, the unit consumption which is the amount of CO2 emissions generated to generate the unit amount of the first electric energy is a numerical value ddd, the second electric energy supplied from the second power plant 20B is a numerical value BBB, the unit consumption which is the amount of CO2 emissions generated to generate the unit amount of the second electric energy is a numerical value eee, and the third electric energy supplied from the third power plant 20C is a numerical value CCC, and the unit consumption which is the amount of CO2 emissions generated to generate the unit amount of the third electric energy is a numerical value fff, the emission calculation unit 48C can calculate the upstream emission amount by performing the calculation of [AAA×ddd+BBB×eee+CCC×fff].

[0073] 11 is a flowchart showing a method for calculating the amount of CO2 emissions due to charging of a battery according to this embodiment. When the charging station 23 and the shovel 2A are connected and charging of the battery 31 starts, the power data acquiring unit 48A acquires the amount of power per unit time supplied from the charging station 23 to the battery 31. The power data acquiring unit 48A acquires attribute data attached to the amount of power. The power data acquiring unit 48A acquires ratio data of multiple amounts of power. Using the attribute data and ratio data, the power data acquiring unit 48A can acquire each of the multiple amounts of power (first amount of power, second amount of power, third amount of power) per unit time (step SB1).

[0074] The unit consumption data acquiring unit 48B acquires the respective units of consumption of the plurality of amounts of power updated for each unit time (step SB2).

[0075] The discharge amount calculation unit 48C multiplies each of the multiple amounts of power per unit time acquired in step SB1 by the unit consumption value acquired in step SB2 to calculate the upstream discharge amount per unit time. That is, the discharge amount calculation unit 48C performs the calculation of [Σ(amount of power per unit time×unit consumption value)] (step SB3).

[0076] The discharge amount calculation unit 48C integrates the upstream discharge amount per unit time from the start of charging to the present time (step SB4).

[0077] The discharge amount calculation unit 48C determines whether or not charging of the battery 31 has been completed (step SB5).

[0078] If it is determined in step SB5 that the charging of the battery 31 has not been completed (step SB5: No), the process returns to step SB1, and the processes from step SB1 to step SB4 are performed.

[0079] In step SB6, when it is determined that the charging of the battery 31 is completed (step SB5: Yes), the discharge amount calculation unit 48C calculates the total upstream discharge amount due to the charging of the battery 31. The total upstream discharge amount is equal to the integrated value of the upstream discharge amount per unit time from the start of charging to the end of charging (step SB6).

[0080] The output unit 48D outputs the total upstream emission amount calculated in step SB6 (step SB7). The upstream emission amount may be stored in the emission amount storage unit 50A of the storage 50. The upstream emission amount may be transmitted to the management server 8. A report may be created based on the upstream emission amount.

[0081] In this embodiment, discharge amount calculation unit 48C calculates the relative ratio of the multiple amounts of power used to charge battery 31. Furthermore, discharge amount calculation unit 48C calculates the total amount of power used to charge battery 31 (step SB8).

[0082] Output unit 48D outputs the relative ratios of the multiple amounts of power calculated in step SB8. Output unit 48D also outputs the total amount of power used to charge battery 31 (step SB9).

[0083] For example, when the first amount of power used to charge the battery 31 is X%, the second amount of power is Y%, and the third amount of power is Z%, the output unit 48D outputs that the ratio of the multiple amounts of power (the first amount of power, the second amount of power, and the third amount of power) used to charge the battery 31 is X:Y:Z. Each of X, Y, and Z is a real number greater than or equal to 0 and less than or equal to 100. The sum of X, Y, and Z is 100. The relative ratio of the multiple amounts of power used to charge the battery 31 and the total amount of power used to charge the battery 31 may be stored in the storage 50 or may be transmitted to the management server 8. A report may be created based on the relative ratio of the multiple amounts of power and the total amount of power.

[0084] In the present embodiment, the power data acquiring unit 48A may acquire power amount data indicating values ​​of a plurality of power amounts (a first power amount, a second power amount, and a second power amount) instead of the ratio data.

[0085] [Third embodiment] A third embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0086] Fig. 12 is a view of the shovel 2A according to the embodiment as seen from above. Fig. 12 is a view in which a part of the shovel 2A is cut away. The shovel 2A has a battery connector 65 disposed inside the revolving body 9. A battery 31 is attached to the battery connector 65. In this embodiment, the battery 31 is attached to and detached from the battery connector 65. In the example shown in Fig. 12, two batteries 31 are attached to the battery connector 65. The number of batteries 31 attached to the battery connector 65 may be one, or may be any number of batteries 31 equal to or greater than three.

[0087] Fig. 13 is a diagram showing the relationship between the power station 20 and the charging station 23 according to this embodiment. As shown in Fig. 13, in this embodiment, the battery 31 is charged by the charging station 23 in a state where it is disconnected from the battery connector 65. In this embodiment, the battery 31 has a microcomputer 60. The microcomputer 60 has a processor, a main memory, a storage, and an interface.

[0088] In this embodiment, a processor of a microcomputer 60 arranged in the battery 31 has the functions of the power data acquisition unit 48A, the unit consumption data acquisition unit 48B, the emission amount calculation unit 48C, and the output unit 48D described in the above embodiments. The attribute data, the ratio data, and the unit consumption data are transmitted from the charging station 23 to the microcomputer 60. The battery 31 is charged by the supply power supplied from the charging station 23. The microcomputer 60 calculates the upstream emission amount according to the above third embodiment.

[0089] When charging of the battery 31 is completed, the battery 31 is mounted on the revolving bed 9 and attached to the battery connector 65. When the battery 31 is attached to the battery connector 65, the total upstream discharge amount calculated in the microcomputer 60 is transferred to the on-vehicle controller 40. The processor 48 of the on-vehicle controller 40 can store the upstream discharge amount transferred from the microcomputer 60 in the discharge amount memory unit 50A of the storage 50, or transmit it to the management server 8.

[0090] In this embodiment, the microcomputer 60 may obtain power amount data indicating values ​​of a plurality of power amounts (a first power amount, a second power amount, and a second power amount) instead of the ratio data.

[0091] In this embodiment, the battery 31 may have a communication device connected to the microcomputer 60. The microcomputer 60 may transfer the attribute data, ratio data (electric energy data), and basic unit data transmitted from the charging station 23 to at least one of the on-vehicle controller 40 and the management server 8. In addition, the microcomputer 60 may transmit the calculated upstream emission amount to at least one of the on-vehicle controller 40 and the management server 8.

[0092] In this embodiment, the attribute data, ratio data (electric energy data), and unit data transmitted from the charging station 23 to the microcomputer 60 may be transferred to the in-vehicle controller 40. The in-vehicle controller 40 may calculate the upstream emission amount based on the attribute data, ratio data (electric energy data), and unit data transmitted from the microcomputer 60.

[0093] In this embodiment, the attribute data, ratio data (electric energy data), and unit data transmitted from the charging station 23 to the microcomputer 60 may be transferred to the management server 8. The management server 8 may calculate the upstream emission amount based on the attribute data, ratio data (electric energy data), and unit data transmitted from the microcomputer 60.

[0094] [Fourth embodiment] A fourth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0095] FIG. 14 is a diagram for explaining a method of acquiring the basic unit data according to the present embodiment. In the above-described embodiment, the vehicle-mounted controller 40 (microcomputer 60) acquires the basic unit data from the charging station 23. As shown in FIG. 14, the basic unit data may be input from an input device 13 connected to the management server 8. The vehicle-mounted controller 40 (microcomputer 60) may acquire the basic unit data from the input device 13. For example, when an external organization such as a power transmission company or a government organization publishes basic unit data, the administrator may input the published value of the basic unit published by the external organization from the input device 13. The basic unit data input from the input device 13 is transmitted to the vehicle-mounted controller 40 via the management server 8 and the communication system 7. The input device 15 for inputting the basic unit data may be disposed in the excavator 2A.

[0096] The on-board controller 40 (microcomputer 60) may obtain the basic unit data from the Internet 16. When an external organization such as a power transmission company or a government organization publishes the basic unit data on the Internet, the on-board controller 40 (microcomputer 60) may obtain the basic unit data from the Internet 16. The on-board controller 40 (microcomputer 60) may obtain the basic unit data directly from the Internet 16. The management server 8 may obtain the basic unit data from the Internet 16. The management server 8 may transmit the basic unit data obtained from the Internet 16 to the on-board controller 40 via the communication system 7.

[0097] In addition, when unit consumption data published by an external organization is input from the input device 13 or the input device 15, the on-board controller 40 may calculate the upstream emissions based on the unit consumption data input from the input device 13 or the input device 15.

[0098] [Fifth embodiment] A fifth embodiment will be described below. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0099] FIG. 15 is a diagram showing a shovel 2A according to this embodiment. In the above-mentioned embodiment, the supply power generated in the power plant 20 is used to charge the battery 31. The supply power generated in the power plant 20 may be directly consumed by the work machine 2 without being used to charge the battery 31. In the example shown in FIG. 15, the shovel 2A is connected to the external power source 27 via the cable 28. The shovel 2A operates in a state in which the electric motor 35 is connected to the external power source 27 via the cable 28. The external power source 27 supplies supply power to drive the electric motor 35 of the shovel 2A. The external power source 27 is supplied with power from the power plant 20 via the power transmission facility 24. The processor 48 of the shovel 2A acquires power data indicating the supply power supplied from the external power source 27 to drive the electric motor 35, acquires unit consumption data indicating unit consumption, calculates the upstream emission based on the power data and the unit consumption data, and outputs the calculated upstream emission.

[0100] [Other embodiments] In the above-described embodiment, the work machine 2 is remotely operated. Also, in the above-described embodiment, an operator is not on board the work machine 2. An operator may be on board the work machine 2. The work machine 2 may be operated by driving operations by an operator on board the work machine 2.

[0101] In the above embodiment, the electric actuator to which the supply power is supplied is the electric motor 35. The electric actuator may be an electric cylinder that operates the work machine 11.

[0102] In the above-described embodiment, the function of the on-vehicle controller 40 may be provided in the management server 8. The management server 8 may calculate the upstream emission amount. For example, when the on-vehicle controller 40 acquires the power data and the basic unit data, the power data and the basic unit data may be transmitted from the on-vehicle controller 40 to the management server 8. The management server 8 may calculate the upstream emission amount based on the power data and the basic unit data transmitted from the on-vehicle controller 40. Note that the management server 8 may acquire the power data and the basic unit data without going through the on-vehicle controller 40.

[0103] In the above-described embodiment, the upstream emission amount may be calculated by a processor of the information terminal 5. The information terminal 5 may obtain the power data and the basic unit data from at least one of the on-board controller 40 and the management server 8.

[0104] In the above embodiment, the emission calculation unit 48C calculates the upstream emission amount based on the power data indicating the supply power and the unit data indicating the greenhouse gas emission amount generated when generating a unit amount of power. The emission calculation unit 48C may calculate the upstream emission amount based on the power data indicating the supply power and the charge unit data indicating the greenhouse gas emission amount generated when generating the amount of power required for one charge of the battery 31.

[0105] That is, emission calculation unit 48C may calculate the upstream emission based on the power data and unit data which is the amount of greenhouse gas emission generated when the power source generates a certain amount of power. The unit data includes unit data which indicates the unit of greenhouse gas emission generated when the power source generates a unit amount of power. The unit data includes charge unit data which indicates the unit of charge which is the amount of greenhouse gas emission generated when the power source generates an amount of power required for one charge of battery 31.

[0106] In the above-described embodiment, the processor may not only calculate the upstream discharge amount when the amount of electricity required for one charge of the battery 31 is generated, but may also calculate and output, for example, a one-month accumulated value of the upstream discharge amount, a one-year accumulated value, or an accumulated value from the manufacture of the work machine 2 to the present.

[0107] In the above-described embodiment, the processor may calculate the CO2 emissions as Scope 1 emissions or Scope 3 emissions of the GHG Protocol. For example, the total upstream emissions may be calculated as Scope 1 emissions for a construction company, and the total upstream emissions may be calculated as Scope 3 emissions for a machine manufacturing company. [Explanation of symbols]

[0108] 1...management system, 2...working machine, 2A...shovel, 2B...bulldozer, 2C...dump truck, 3...work site, 4...remote control room, 5...information terminal, 6...remote control device, 7...communication system, 8...management server, 9...rotating body, 10...traveling body, 10A...track, 11...working machine, 11A...boom, 11B...arm, 11C...bucket, 12...working machine cylinder, 12A...boom cylinder, 12B...arm cylinder, 12C...bucket cylinder, 13...input device, 14...output device, 15...input device, 16...internet, 20...power plant, 20A...first power plant, 20B...second power plant, 20C...third power plant, 23...charging station station, 24...power transmission equipment, 25...cable, 27...external power supply, 28...cable, 30...control system, 31...battery, 32...charging device, 33...DC / DC converter, 34...inverter, 35...electric motor, 36...hydraulic pump, 37...main valve, 38...hydraulic actuator, 40...on-board controller, 43...communication device, 48...processor, 48A...power data acquisition unit, 48B...unit energy consumption data acquisition unit, 48C...emissions calculation unit, 48D...output unit, 49...main memory, 50...storage, 50A...emissions storage unit, 51...interface, 60...microcomputer, 65...battery connector.

Claims

1. A processor is provided. The processor, acquiring power data indicating supplied power, which is power supplied from a power source to charge a battery mounted on the work machine; Obtaining unit data that is an amount of greenhouse gas emissions generated when the power source generates a certain amount of electricity; Calculating upstream emissions, which are greenhouse gas emissions of the supplied electricity, based on the power data and the unit data; outputting the upstream exhaust gas; Work machine management system.

2. The processor, The unit data includes unit data indicating a unit of greenhouse gas emissions generated when the power source generates a unit amount of electricity, Calculating the upstream emission amount based on the power data and the basic unit data. A work machine management system according to claim 1.

3. The power source includes a plurality of power sources having different basic units, The processor, Obtaining basic unit data for each of multiple power sources, Calculating the total amount of greenhouse gas emissions calculated for each of the multiple power sources as the upstream emission amount; A work machine management system according to claim 2.

4. The processor, obtaining ratio data indicative of a relative ratio of supplied power provided by each of the plurality of power sources; Calculating the upstream emission amount based on the ratio data. A work machine management system according to claim 3.

5. The processor, Calculate the amount of upstream emissions per unit time, A work machine management system according to claim 1.

6. The processor, Calculating an upstream discharge amount per unit time during a charging period of the battery; A work machine management system according to claim 1.

7. The processor, Calculating an upstream discharge amount during a charging period of the battery; A work machine management system according to claim 1.

8. The supply power includes an amount of power for charging the battery. A work machine management system according to claim 1.

9. The processor, Outputting the amount of power. A work machine management system according to claim 8.

10. the processor is located on the work machine; A work machine management system according to claim 1.

11. The supply power is supplied from a charging station to the battery; The processor, acquiring the unit data from the charging station; A work machine management system according to claim 10.

12. The processor, acquiring the unit data from an input device; A work machine management system according to claim 10.

13. The processor, Acquiring the unit data from the Internet; A work machine management system according to claim 10.

14. the work machine has a battery connector to which the battery is attached and detached, The battery is charged while disconnected from the battery connector; the processor is disposed in the battery; A work machine management system according to claim 1.

15. The work machine has an electric actuator, The battery supplies power to the electric actuator. A work machine management system according to claim 1.

16. A processor is provided. The processor, Acquire power data indicating supplied power, which is power supplied from a power source to drive an electric actuator of the work machine; Obtaining unit data that is an amount of greenhouse gas emissions generated when the power source generates a certain amount of electricity; Calculating upstream emissions, which are greenhouse gas emissions of the supplied electricity, based on the power data and the unit data; outputting the upstream exhaust gas; Work machine management system.

17. acquiring power data indicative of supplied power, which is power supplied from a power source to charge a battery mounted on the work machine; obtaining unit data indicative of greenhouse gas emissions generated when the power source generates a certain amount of power; Calculating upstream emissions, which are greenhouse gas emissions of the supplied power, based on the power data and the unit data; and outputting the upstream exhaust gas. How to manage work machinery.

18. acquiring power data indicating supplied power, which is power supplied from a power source to drive an electric actuator of the work machine; obtaining unit data indicative of greenhouse gas emissions generated when the power source generates a certain amount of power; Calculating upstream emissions, which are greenhouse gas emissions of the supplied power, based on the power data and the unit data; and outputting the upstream exhaust gas. How to manage work machinery.

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