Work machine management system and work machine management method

Abstract

This work machine management system comprises a processor. The processor: acquires power data indicating supply power, which is the power supplied from a power source in order to charge a battery mounted on the work machine; acquires unit data, which is the greenhouse gas emission amount generated when the power source generates a certain amount of power; calculates an upstream emission amount, which is the supply power greenhouse gas emission amount, on the basis of the power data and the unit data; and outputs the upstream emission amount.

Description

Work machine management system and work machine management method

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

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

[0003] Special Publication No. 2022-510390

[0004] From the viewpoint of preventing global warming, it is desirable to reduce greenhouse gas emissions. To prevent global warming, battery-equipped work machines have been proposed in the technical field of work machines. When the electricity used by a work machine is generated using fossil fuel energy, even when a battery-equipped work machine is used, it may still result in the emission of greenhouse gases. Even when a battery-equipped work machine is used, it is necessary to understand the extent to which greenhouse gases are being emitted.

[0005] An object of the present disclosure is to determine the amount of greenhouse gases being emitted even when a work machine equipped with a battery is used.

[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.

[0007] According to the present disclosure, even when a work machine having a battery is used, it is possible to determine the amount of greenhouse gases being emitted.

[0008] FIG. 1 is a diagram showing a management system for a work machine according to the first embodiment. FIG. 2 is a diagram showing a shovel according to the first embodiment. FIG. 3 is a diagram showing a control system for a shovel according to the first embodiment. FIG. 4 is a diagram showing the relationship between a power plant and a charging station according to the first embodiment. FIG. 5 is a block diagram showing an on-board controller according to the first embodiment. FIG. 6 is a diagram showing the relationship between a basic unit and time according to the first embodiment. FIG. 7 is a diagram showing CO2 reduction due to charging of a battery according to the first embodiment. ２ FIG. 8 is a flowchart showing a method for calculating an amount of CO2 emissions from charging a battery according to the second embodiment. FIG. 9 is a diagram showing ratio data of a plurality of types of power according to the second embodiment. FIG. 10 is a diagram showing the relationship between each of a plurality of types of power and a basic unit according to the second embodiment. FIG. 11 is a diagram showing CO2 emissions from charging a battery according to the second embodiment. ２ FIG. 12 is a flowchart showing a method for calculating emissions. FIG. 13 is a diagram showing the relationship between a power plant and a charging station according to the third embodiment. FIG. 14 is a diagram for explaining a method for acquiring basic unit data according to the fourth embodiment. FIG. 15 is a diagram showing a shovel according to the fifth embodiment.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. 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 work machines 2 operating at a work site 3. In this embodiment, the work machines 2 are electrically powered work machines powered by batteries and electric actuators. 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 is on board the work machine 2. The work machine 2 is remotely controlled. A remote control room 4 is installed outside the work machine 2. The remote control room 4 is installed in a remote location on the work site 3. An information terminal 5 and a remote control device 6 for remotely controlling the work machine 2 are each disposed in the remote control room 4. The information terminal 5 and the remote control device 6 are each located outside the work machine 2. The information terminal 5 includes a computer system disposed in the remote control 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. A camera that acquires image data of the work site 3 is provided on at least one of the work machine 2 and 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 is able to communicate with the work machine 2 via the 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] 2 is a view showing a shovel 2A according to this embodiment from the front left. The shovel 2A has a revolving unit 9, a traveling unit 10, a work implement 11, and a work implement cylinder 12.

[0018] The rotating unit 9 is the body of the shovel 2A. The running unit 10 is a traveling device of the shovel 2A. The running unit 10 supports the rotating unit 9. The rotating unit 9 is supported by the running unit 10 so that it can rotate. The rotating unit 9 is disposed above the running unit 10. The running unit 10 runs while supporting the rotating unit 9. The running unit 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 revolving unit 9. The work implement 11 includes a boom 11A connected to the front of the revolving unit 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> Figure 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 the direct current from the battery 31 to the inverter .

[0024] The inverter 34 converts the direct current from the DC / DC converter 33 into a three-phase alternating current and supplies it to the electric motor 35. The electric motor 35 is driven based on the three-phase alternating current supplied from the inverter 34.

[0025] The electric motor 35 is a power source for 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 a work implement 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 implement 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 on-board controller 40 includes a computer system. The communication device 43 is connected to the on-board controller 40. The communication device 43 communicates with the management server 8 wirelessly.

[0029] <Supply Power> Fig. 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 power transmission equipment 24. The charging station 23 charges the battery 31 using the power supplied from the power transmission equipment 24. The charging station 23 and the shovel 2A are connected via a cable 25. The charging station 23 supplies power to the shovel 2A via the cable 25. The charging station 23 may be located 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 supplied electric power.

[0031] In this embodiment, the power supplied 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, 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. ２ ), methane (CH ４ ), nitrous oxide (N ２ In this embodiment, the management system 1 calculates the greenhouse gas emissions as follows: ２ The management system 1 calculates the CO emissions of the power supply procured from the power plant 20. ２The upstream emissions are calculated as follows: The upstream emissions are calculated as the CO ２ Emissions.

[0033] For example, if the electricity supply is generated using non-renewable energy, the upstream emissions will be high. If the electricity supply is generated using renewable energy, the upstream emissions will be low. 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 lower than those 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 hydropower.

[0034] In this embodiment, the on-board controller 40 stores power data indicating the power supply supplied from the charging station 23 and the CO generated when the power plant 20 generates a unit amount of power. ２ Based on the basic unit data that shows the CO emissions of the supplied electricity ２ In this embodiment, the supply power includes the amount of power [kWh] required to charge the battery 31. The unit consumption is the amount of CO2 generated when the power plant 20 generates a unit amount of power. ２ Emissions [kg CO ２ / kWh].

[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 by an external organization. Examples of external organizations that provide secondary data to the management system 1 include a power transmission company or a government agency that manages the power plant 20. 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] <On-Vehicle Controller> FIG. 5 is a block diagram showing the on-vehicle controller 40 according to this embodiment. The management server 8 and the on-vehicle controller 40 each include a computer system. The on-vehicle controller 40 is disposed in the excavator 2A. The on-vehicle controller 40 includes a processor 48 such as a central processing unit (CPU), a main memory 49 including a nonvolatile memory such as a read-only memory (ROM) and a volatile memory such as a random access memory (RAM), 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, loads it into the main memory 49, and executes processing in accordance with the computer program. The computer program may be distributed from the management server 8 via a network.

[0037] Similarly, the management server 8 has 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 the power supplied to drive the electric motor 35. In the present embodiment, the power data acquiring unit 48A acquires the amount of power [kWh] required to charge the battery 31. The power data acquiring unit 48A can calculate the amount of power [kWh] required to charge 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 unit consumption data acquisition unit 48B acquires the CO 2 generated when a unit amount of electricity is generated. ２ The basic unit data indicating the amount of CO2 emitted when generating a unit amount of power to charge the battery 31 is acquired. ２ Emissions [kg CO ２ / kWh]. In this embodiment, the power transmission company provides the energy consumption data to the on-board controller 40 via the charging station 23. The energy consumption data acquisition unit 48B acquires the energy consumption data via the charging station 23.

[0042] The emission calculation unit 48C calculates the CO2 emissions 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. ２ Emissions, upstream emissions [kg CO ２ In this embodiment, the emission calculation unit 48C calculates the emission amount [kWh] for charging the battery 31. ２ / kWh] to obtain the CO generated in the generation of the supply electricity at the power plant 20. ２ Upstream emissions [kgCO ２ That is, the emission calculation unit 48C calculates [amount of power x basic unit] to calculate the CO ２ Calculate the upstream emissions.

[0043] FIG. 6 is a diagram showing the relationship between the consumption unit and time according to this embodiment. As shown in FIG. 6 , the consumption unit may fluctuate, for example, based on the power generation conditions or the power generation environment of the power plant 20. The consumption unit data provided to the on-board controller 40 may be updated every unit time. The consumption unit data provided to the on-board 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. In other words, the discharge amount calculation unit 48C may calculate the total upstream discharge amount from the start to the end of charging of 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 control 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, when an output device is arranged on the shovel 2A, the output device arranged 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> FIG. 7 shows the CO2 management method for charging the battery 31 according to this embodiment. ２ 10 is a flowchart illustrating a method for calculating an amount of discharged electricity. 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 electricity 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 charging of the battery 31 has finished (step SA5).

[0051] If it is determined in step SA5 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 executed.

[0052] If it is determined in step SA6 that charging of the battery 31 has finished (step SA5: Yes), the discharge amount calculation unit 48C calculates the total upstream discharge amount due to 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 supplied power, which is the power supplied to drive the electric motor 35 of the work machine 2. The processor 48 calculates the CO₂ of a unit amount of power. ２ The processor 48 acquires the basic unit data indicating the emission amount. ２ The upstream emission amount, which is the emission amount, is calculated. The processor 48 outputs the upstream emission amount. This makes it possible to determine how much greenhouse gas is being emitted by using the work machine 2 equipped with 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 will be 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 plants 20 and the charging stations 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 referred to as the first power source, the second power plant 20B will be referred to as the second power source, and the third power plant 20C will be referred to as the third power source, as appropriate.

[0058] The number of power plants 20 may be two, or any number of three or more.

[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 unit consumption of electricity generated by each of the multiple power plants 20 (20A, 20B, 20C) [kgCO ２ / kWh] are different from each other. That is, the CO ２ Emissions [kg CO ２ / kWh] and CO from the second power source to produce a unit amount of power. ２ Emissions [kg CO ２ / kWh] and CO from a third power source to produce a unit amount of electricity. ２ Emissions [kg CO ２ / kWh] are different from each other.

[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, CO ２ The amount of emissions is large, and the CO from the second power plant 20B ２ Emissions and CO from the third power plant 20C ２ The amount of CO emissions is small in the power generation of the second power plant 20B and the third power plant 20C. ２ When electricity is used to operate the second power plant 20B and the third power plant 20C, CO is not generated when generating the electricity used for the operations. ２ Furthermore, raw materials such as uranium are required for power generation at the second power plant 20B, and CO ２ may occur.

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

[0063] In this embodiment, power attribute data is provided as secondary data to the on-board controller 40 via the charging station 23. For example, a power transmission company provides the power attribute data to the on-board 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 method includes 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 electricity attribute data may include the name and location of the power plant 20 (20A, 20B, 20C).

[0066] Furthermore, in this embodiment, ratio data indicating the relative ratios of the power supply supplied from each of the multiple power sources is provided as secondary data to the on-board controller 40 via the charging station 23. For example, a power transmission company provides the ratio data of the power supply supplied from each of the multiple power sources to the on-board 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 ratios of multiple power sources according to this embodiment. As described above, the power transmission equipment 24 supplies at least one of the first power from the first power source (first power plant 20A), the second power from the second power source (second power plant 20B), and the third power from the third power source (third power plant 20C) to the charging station 23. That is, the charging station 23 is supplied with the first power at a first ratio (A%), the second power at a second ratio (B%), and the third power at a third ratio (C%). A, B, and C are each a real number between 0 and 100. The sum of A, B, and C is 100. The supplied power used to charge the battery 31 is composed of the first power at A%, the second power at B%, and the third power at C%.

[0068] As shown in Figure 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, if 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 will be low when there is no wind. For example, if the third power is generated by a solar power generation method, the third ratio can be high on sunny days, but the third ratio will be low on cloudy days, rainy days, or at night.

[0069] The ratio data provided to the on-board controller 40 is updated every unit time. The ratio data provided to the on-board 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 basic unit data acquiring unit 48B acquires basic unit data for each of the plurality of power sources (first power source, second power source, third power source). The basic unit data acquiring unit 48B also acquires attribute data for each of the plurality of power sources (first power source, second power source, third power source).

[0071] The emission amount calculation unit 48C calculates the upstream emission amount for each of the plurality of power sources (first power source, second power source, third power source).２ That is, the emission calculation unit 48C calculates the upstream emission amount by performing the calculation [Σ(electric energy×unit consumption)].

[0072] Fig. 10 is a diagram showing the relationship between each of a plurality of electric powers and the unit consumption according to this embodiment. In the example shown in Fig. 10, the first electric power is a first amount of electric power [kWh] for charging the battery 31. The second electric power is a second amount of electric power [kWh] for charging the battery 31. The third electric power is a third amount of electric power [kWh] for charging the battery 31. The first amount of electric power supplied from the first power plant 20A is a numerical value AAA, and the CO2 generated to generate the unit amount of the first amount of electric power is ２ The basic unit, which is the emission amount, is a numerical value ddd, the second amount of power supplied from the second power plant 20B is a numerical value BBB, and the amount of CO generated to generate the unit amount of the second amount of power is ２ The basic unit, which is the emission amount, is the numerical value eee, the third amount of power supplied from the third power plant 20C is the numerical value CCC, and the CO generated to generate the unit amount of the third amount of power is ２ When the emission amount, that is, the basic unit, is the numerical value fff, the emission amount calculation unit 48C can calculate the upstream emission amount by performing the calculation [AAA×ddd+BBB×eee+CCC×fff].

[0073] FIG. 11 shows the CO ２ 1 is a flowchart showing a method for calculating an amount of discharge. When the charging station 23 and the shovel 2A are connected and charging of the battery 31 begins, the power data acquisition unit 48A acquires the amount of power per unit time supplied from the charging station 23 to the battery 31. The power data acquisition unit 48A acquires attribute data assigned to the amount of power. The power data acquisition unit 48A acquires ratio data of multiple amounts of power. Using the attribute data and ratio data, the power data acquisition unit 48A can acquire each of the multiple amounts of power per unit time (first amount of power, second amount of power, third amount of power) (step SB1).

[0074] The unit consumption data acquisition unit 48B acquires the respective unit consumption values ​​of the plurality of amounts of power that have been updated for each unit time (step SB2).

[0075] The emission amount calculation unit 48C calculates the upstream emission amount per unit time by multiplying each of the multiple amounts of power per unit time acquired in step SB1 by the basic unit acquired in step SB2. That is, the emission amount calculation unit 48C performs the calculation of [Σ(amount of power per unit time × basic unit)] (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 charging of the battery 31 has finished (step SB5).

[0078] If it is determined in step SB5 that 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 executed.

[0079] If it is determined in step SB6 that the charging of the battery 31 has been completed (step SB5: Yes), the discharge 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, the discharge amount calculation unit 48C calculates the relative ratio of the amounts of power used to charge the battery 31. The discharge amount calculation unit 48C also calculates the total amount of power used to charge the battery 31 (step SB8).

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

[0083] For example, if 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 (first amount of power, second amount of power, third amount of power) used to charge the battery 31 is X:Y:Z. X, Y, and Z are each real numbers greater than or equal to 0 and less than or equal to 100. The sum of X, Y, and Z is 100. The relative ratios 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 ratios 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 (first power amount, second power amount, and second power amount) instead of 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 will be denoted by the same reference numerals, and the description of those components will be simplified or omitted.

[0086] Fig. 12 is a view of a shovel 2A according to an embodiment as seen from above. Fig. 12 is a view in which a portion of the shovel 2A is broken 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. Note that the number of batteries 31 attached to the battery connector 65 may be one, or any number of batteries 31 equal to or greater than three.

[0087] Fig. 13 is a diagram showing the relationship between the power plant 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 while being 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, the processor of the 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 calculation unit 48C, and the output unit 48D described in the above embodiments. The attribute data, ratio data, and 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 unit 9 and attached to the battery connector 65. When the battery 31 is attached to the battery connector 65, the total upstream emission amount calculated by the microcomputer 60 is transferred to the on-board controller 40. The processor 48 of the on-board controller 40 can store the upstream emission amount transferred from the microcomputer 60 in the emission amount memory unit 50A of the storage 50, or can transmit it to the management server 8.

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

[0091] In the present 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-board controller 40 and the management server 8. The microcomputer 60 may also transmit the calculated upstream emissions to at least one of the on-board controller 40 and the management server 8.

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

[0093] In the present embodiment, the attribute data, ratio data (electric energy data), and unit consumption 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 emissions based on the attribute data, ratio data (electric energy data), and unit consumption 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 embodiments are denoted by the same reference numerals, and the description of these components will be simplified or omitted.

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

[0096] The on-board controller 40 (microcomputer 60) may acquire the energy consumption data from the Internet 16. If an external organization such as a power transmission company or a government agency publishes energy consumption data on the Internet, the on-board controller 40 (microcomputer 60) may acquire the energy consumption data from the Internet 16. The on-board controller 40 (microcomputer 60) may acquire the energy consumption data directly from the Internet 16. The management server 8 may acquire the energy consumption data from the Internet 16. The management server 8 may transmit the energy consumption data acquired 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 input device 13 or input device 15, the on-board controller 40 may calculate the upstream emissions based on the unit consumption data input from input device 13 or 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 embodiments will be 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-described 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 an external power source 27 via a cable 28. The shovel 2A operates with the electric motor 35 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. Electricity from the power plant 20 is supplied to the external power source 27 via the power transmission facility 24. According to the above-described embodiment, 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 upstream emissions based on the power data and the unit consumption data, and outputs the calculated upstream emissions.

[0100] [Other Embodiments] In the above-described embodiment, the work machine 2 is remotely controlled. Furthermore, 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 performed 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. However, the electric actuator may be an electric cylinder that operates the work machine 11.

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

[0103] In the above-described embodiment, the upstream emissions may be calculated by a processor of the information terminal 5. The information terminal 5 may acquire 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-described 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 amount of greenhouse gas emission generated when a unit amount of power is generated. The emission calculation unit 48C may also calculate the upstream emission amount based on the power data indicating the supply power and the unit data indicating the amount of greenhouse gas emission generated when an amount of power required for one charge of the battery 31 is generated.

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

[0106] In the above-described embodiment, the processor may not only calculate the amount of upstream discharge 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 cumulative value of the upstream discharge, a one-year cumulative value, or a cumulative value from the time the work machine 2 was manufactured to the present.

[0107] In the above embodiment, the processor ２ The emissions may be calculated 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, or as Scope 3 emissions for a machine manufacturer.

[0108] 1...Management system, 2...Construction 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...Slewing body, 10...Traveling body, 10A...Crawler, 11...Construction machine, 11A...Boom, 11B...Arm, 11C...Bucket, 12...Construction 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 work machine management system comprising a processor, which acquires power data indicating supplied power, which is power supplied from a power source to charge a battery mounted on a work machine, acquires unit data which is an amount of greenhouse gas emissions generated when the power source generates a certain amount of power, calculates upstream emissions, which are the greenhouse gas emissions of the supplied power, based on the power data and the unit data, and outputs the upstream emissions.

2. A work machine management system as described in claim 1, wherein the unit data includes unit data indicating a unit amount of greenhouse gas emissions generated when the power source generates a unit amount of electricity, and the processor calculates the upstream emissions based on the power data and the unit data.

3. A work machine management system as described in claim 2, wherein the power sources include a plurality of power sources having different intensity units, and the processor acquires intensity data for each of the plurality of power sources, and calculates, as the upstream emissions, a total value of the greenhouse gas emissions calculated for each of the plurality of power sources.

4. The work machine management system according to claim 3, wherein the processor obtains ratio data indicating a relative ratio of the power supply supplied from each of a plurality of power sources, and calculates the upstream emission amount based on the ratio data.

5. The work machine management system according to claim 1, wherein the processor calculates an upstream emission amount per unit time.

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

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

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

9. The work machine management system according to claim 8, wherein the processor outputs the amount of electric power.

10. The work machine management system according to claim 1, wherein the processor is disposed on the work machine.

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

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

13. A work machine management system according to claim 10, wherein the processor acquires the unit data from the Internet.

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

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

16. A work machine management system comprising a processor, which acquires power data indicating supplied power, which is power supplied from a power source to drive an electric actuator of a work machine, acquires unit data which is an amount of greenhouse gas emissions generated when the power source generates a certain amount of power, calculates upstream emissions which are the greenhouse gas emissions of the supplied power based on the power data and the unit data, and outputs the upstream emissions.

17. A method for managing a work machine, comprising: acquiring power data indicating supplied power, which is power supplied from a power source to charge a battery mounted on the work machine; acquiring unit data indicating greenhouse gas emissions generated when the power source generates a certain amount of power; calculating upstream emissions, which are the greenhouse gas emissions of the supplied power, based on the power data and the unit data; and outputting the upstream emissions.

18. A method for managing a work machine, comprising: acquiring power data indicating supplied power, which is power supplied from a power source to drive an electric actuator of the work machine; acquiring unit data indicating greenhouse gas emissions generated when the power source generates a certain amount of power; calculating upstream emissions, which are the greenhouse gas emissions of the supplied power, based on the power data and the unit data; and outputting the upstream emissions.

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