Deterioration degree estimation device, deterioration degree estimation method, and program

Abstract

To provide a battery degradation degree estimation device, a degradation degree estimation method, and a program.SOLUTION: A degradation degree estimation device 20 includes an acquisition unit 72 for acquiring power supply amount information relating to the amount of power supplied to a battery and environmental temperature information relating to the environmental temperature, which is the temperature of the environment in which the charging of the battery has been performed whenever charging to a battery 12 provided in a mobile body 10 is performed by a charging device 40, and an estimation unit 74 for estimating a degradation degree L of the battery on the basis of the number of charging times, which is the number of times the battery has been charged, the power supply amount information, and the environmental temperature information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a deterioration degree estimation device, a deterioration degree estimation method, and a program. [Background technology]

[0002] In recent years, research and development has been conducted on charging mobility vehicles equipped with secondary batteries that contribute to energy efficiency, in order to ensure more people have access to affordable, reliable, sustainable and advanced energy.

[0003] Patent Document 1 discloses a degradation state estimation device that estimates the degradation state of a secondary battery. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-155706 Summary of the Invention [Problem to be solved by the invention]

[0005] Recently, there has been a demand for more convenient estimation devices.

[0006] The present invention aims to solve the above-mentioned problems, and ultimately contributes to energy efficiency. [Means for solving the problem]

[0007] A first aspect of the present invention is a deterioration degree estimation device comprising: an acquisition unit that acquires power supply amount information regarding the amount of power supplied to a battery provided in a mobile body and environmental temperature information regarding the environmental temperature, which is the temperature of the environment in which the battery is charged, each time the battery is charged by a charging device; and an estimation unit that estimates the deterioration degree of the battery based on the number of charges, which is the number of times the battery is charged, the power supply amount information, and the environmental temperature information.

[0008] A second aspect of the present invention is a method for estimating a degree of deterioration, comprising: an acquisition step of acquiring power supply amount information regarding the amount of power supplied to a battery provided in a mobile body and environmental temperature information regarding the environmental temperature, which is the temperature of the environment in which the battery is charged, each time the battery is charged by a charging device; and an estimation step of estimating a degree of deterioration of the battery based on the number of charges, which is the number of times the battery is charged, the power supply amount information, and the environmental temperature information.

[0009] A third aspect of the present invention is a program that causes a computer to execute an acquisition step of acquiring power supply amount information regarding the amount of power supplied to the battery and environmental temperature information regarding the environmental temperature, which is the temperature of the environment in which the battery was charged, each time a battery provided in a mobile object is charged by a charging device, and an estimation step of estimating the degree of deterioration of the battery based on the number of charges, which is the number of times the battery was charged, the power supply amount information, and the environmental temperature information. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a deterioration degree estimation device, a deterioration degree estimation method, and a program that are highly convenient. [Brief explanation of the drawings]

[0011] [Figure 1]FIG. 1 is a diagram schematically illustrating a network connection configuration of a deterioration degree estimation device that estimates the deterioration degree of a battery provided in a mobile object. [Figure 2] FIG. 2 is a block diagram showing a schematic configuration of a battery deterioration degree estimation device. [Figure 3] FIG. 3 is a diagram illustrating an example of battery charging history data. [Figure 4] Fig. 4A is a diagram illustrating an example of a table that defines a correction coefficient for correcting the total amount of power supply, Fig. 4B is a diagram illustrating an example of a table that defines a correction coefficient for correcting the number of times of charging, and Fig. 4C is a diagram illustrating an example of a table that defines a correction coefficient for correcting the amount of power supply for each time. [Figure 5] FIG. 5 is a diagram showing an example of a table used to estimate the degree of deterioration of a battery. [Figure 6] FIG. 6 is a diagram showing an example of a screen display of a terminal device on which information indicating an estimated degree of deterioration of a battery is output. [Figure 7] FIG. 7 is a flowchart showing the procedure of the degradation degree estimation process performed by the battery degradation degree estimation device. [Figure 8] FIG. 8 is a diagram showing how a charging card is inserted into an insertion port of the charging device. DETAILED DESCRIPTION OF THE INVENTION

[0012] FIG. 1 is a diagram schematically illustrating a network connection configuration of a degradation degree estimation device 20 that estimates the degradation degree of a battery 12 provided in a mobile object 10. A charging device 40 is connected to the degradation degree estimation device 20 via a communication network 30, and a terminal device 50 is also connected to the degradation degree estimation device 20 via the communication network 30. The terminal device 50 is, for example, a terminal device owned by a user of the mobile object 10, but is not limited thereto. The terminal device 50 may also be a terminal device owned by a business operator that evaluates the value of the mobile object 10. The mobile object 10 is, for example, an electric vehicle. In this embodiment, a case where the mobile object 10 is an electric vehicle will be described as an example. However, the mobile object 10 may also be another mobile object, such as a robot or an aircraft.

[0013] FIG. 2 is a block diagram showing a schematic configuration of a deterioration degree estimation device 20 for a battery 12. The deterioration degree estimation device 20 has a processing circuit 60 and a storage unit 62. The processing circuit 60 includes a processor such as a CPU or a GPU. The storage unit 62 includes a volatile memory such as a RAM and a non-volatile memory such as a ROM or a flash memory. The volatile memory is used as a working memory for the processor. The non-volatile memory stores programs executed by the processor and other necessary data.

[0014] The processing circuit 60 has an acquisition unit 72, an estimation unit 74, and an output unit 76. The acquisition unit 72, the estimation unit 74, and the output unit 76 are realized by the processing circuit 60 executing a program stored in the storage unit 62. At least some of the acquisition unit 72, the estimation unit 74, and the output unit 76 may be realized by an integrated circuit such as an ASIC or an FPGA, or an electronic circuit including a discrete device.

[0015] The acquisition unit 72 can acquire signals supplied from the charging device 40 via a communication module (not shown) and the communication network 30. The acquisition unit 72 acquires power supply amount information and environmental temperature information every time the charging device 40 charges the battery 12 provided in the mobile object 10. The power supply amount information is information related to the amount of power supplied to the battery 12. The environmental temperature information is information related to the environmental temperature, which is the temperature of the environment in which the battery 12 is charged.

[0016] More specifically, the acquisition unit 72 acquires a charge notification signal supplied from the charging device 40. The charge notification signal includes data indicating the mobile object ID of the mobile object 10 equipped with the battery 12 to be charged by the charging device 40. The charge notification signal includes data on the remaining battery capacity (SOC: State Of Charge) of the battery 12. The charge notification signal includes data on the environmental temperature, which is the temperature of the environment in which the battery 12 is charged.

[0017] The acquisition unit 72 stores in the storage unit 62 a record (see FIG. 3) including data on the remaining battery charge, data on the ambient temperature, and data on the time when the charge notification signal was acquired. The multiple records stored in the storage unit 62 make up charge history data. The charge history data is recorded in the storage unit 62 in association with the mobile object ID. The time when the charge notification signal was acquired can be treated as the time when charging was completed. The data on the time when the charge notification signal was acquired can be treated as data on the date and time of charging. The data on the date and time of charging is included in the record.

[0018] The battery remaining capacity data includes data on a first battery remaining capacity, which is the remaining capacity of the battery 12 when charging of the battery 12 is started. The battery remaining capacity data includes data on a second battery remaining capacity, which is the remaining capacity of the battery 12 when charging of the battery 12 is completed. The acquisition unit 72 calculates the amount of power supplied to the battery 12 based on the data on the first battery remaining capacity and the data on the second battery remaining capacity included in the record.

[0019] The environmental temperature is the temperature of the environment in which the battery 12 is charged. The environmental temperature may be measured, for example, by a temperature sensor provided in the mobile object 10. It is preferable, but not limited to, that the environmental temperature be acquired by a temperature sensor located near the battery 12 provided in the mobile object 10. The environmental temperature may also be measured by a temperature sensor provided in the charging device 40. Note that, if the charging notification signal does not include environmental temperature data, temperature data of the area where the charging device 40 is installed may be used as the environmental temperature. The temperature data is distributed to the deterioration degree estimation device 20 via the communication network 30 from, for example, a provider (not shown) operated by a company that provides a temperature data distribution service.

[0020] The estimation unit 74 estimates the degree of deterioration of the battery 12 based on the number of times the battery 12 has been charged, the power supply amount information, and the environmental temperature information. The number of times the battery 12 has been charged is the number of times the battery 12 has been charged. The number of times the battery 12 has been charged is determined by counting the number of records in the charging history data.

[0021] The output unit 76 outputs information indicating the degree of deterioration of the battery 12 estimated by the estimation unit 74 to the screen of the terminal device 50 via the communication network 30.

[0022] 3 is a diagram illustrating charging history data 100 of the battery 12. The charging history data 100 is stored in the storage unit 62 by the acquisition unit 72. The charging history data 100 is generated for each mobile object ID. A plurality of records 102 are recorded in the charging history data 100. Each record 102 includes data on the remaining battery capacity, data on the ambient temperature, and data on the charging date and time.

[0023] The battery remaining capacity data includes data on a first battery remaining capacity and data on a second battery remaining capacity. As described above, the first battery remaining capacity is the remaining capacity of the battery 12 when charging of the battery 12 is started. The second battery remaining capacity is the remaining capacity of the battery 12 when charging of the battery 12 is completed. Each time the charging device 40 charges the battery 12, one record 102 is recorded. The power supply amount PI in each charging of the battery 12 is the difference between the first battery remaining capacity and the second battery remaining capacity.

[0024] The estimation unit 74 estimates the degree of deterioration of the battery 12 as follows, but is not limited to the following. The number of cycles NC is used as an indication of the life BL of the battery 12. The number of cycles NC indicates how many times charging and discharging can be repeated, with charging and discharging being one set. The number of cycles NC of the battery 12 is specified in advance by the manufacturer of the battery 12, etc. Since the number of cycles NC is an indication of the life BL of the battery 12, a value obtained by multiplying the capacity of the battery 12 (battery capacity, cell capacity) by the number of cycles NC can also be used as an indication of the life BL of the battery 12.

[0025] The capacity of a brand new battery 12 in a fully charged state corresponds to 100% SOC. Therefore, the total discharge amount PD, which is the sum of the discharge amounts when charging and discharging between 0% and 100% is repeated a number NC of cycles, is 100[%]×NC. In other words, the total discharge amount PD, which is the sum of the discharge amounts from the start of use of the battery 12 until it reaches the end of its life BL, is 100[%]×NC when expressed in SOC.

[0026] The degree of deterioration of the battery 12 can be estimated based on the ratio between the total amount of power supplied in the past P to the battery 12 and the total discharge amount PD described above. The total amount of power supplied in the past P is obtained by accumulating the amount of power supplied in each charge to the battery 12. As will be described later with reference to Figures 4A, 4B, and 4C, the degree of deterioration of the battery 12 can be estimated more accurately by correcting the total amount of power supplied in the past P.

[0027] 4A is a diagram illustrating a table 110 that defines a correction coefficient CC for correcting the total amount of power supply P. Even if the same amount of power is charged to the battery 12, the degree of deterioration of the battery 12 is greater when the number of times N of charging is large than when the number of times N of charging is small.

[0028] Therefore, when the number of times of charging N is equal to or greater than a predetermined value N0, the total amount of power supply P is multiplied by a correction coefficient CC0 greater than 1. When the number of times of charging N is smaller than the predetermined value N0, the value of the correction coefficient CC is 1. In other words, no correction is made to the total amount of power supply P. The predetermined value N0 is predetermined to, for example, 2000. The predetermined value N0 may be predetermined for each battery 12. The table 110 is stored in the storage unit 62 in advance.

[0029] FIG. 4B is a diagram illustrating an example of a table 112 that defines a correction coefficient CL for correcting the number of charging times N. A state in which the remaining battery charge falls below the lower limit of the remaining charge of the battery 12 is called a low remaining charge state. The lower limit of the remaining charge of the battery 12 is determined in advance to prevent deterioration of the battery 12. To prevent deterioration of the battery 12, it is recommended that users use the battery 12 so that the remaining charge does not fall below the lower limit. The lower limit of the remaining charge of the battery 12 is, for example, 20% of the capacity of the battery 12.

[0030] If the first battery remaining capacity at the start of charging the battery 12 is below the remaining capacity lower limit, a low remaining capacity state has occurred. If the battery 12 is charged in a low remaining capacity state, the degree of deterioration of the battery 12 increases. Therefore, if the ratio R of the number of occurrences of low remaining capacity states to the number of charging times N is equal to or greater than a predetermined value R0, the number of charging times N is multiplied by a correction coefficient CL0 greater than 1. If the ratio R of the number of occurrences of low remaining capacity states is smaller than the predetermined value R0, the value of the correction coefficient CL is 1. In other words, no correction is made to the number of charging times N. The predetermined value R0 is predetermined to, for example, 50%. The predetermined value R0 may be predetermined for each battery 12.

[0031] The table 112 is stored in advance in the storage unit 62. The number of charging times N corrected in this way is used to correct the total amount of power supply P based on the table 110 described above.

[0032] 4C is a diagram illustrating a table 114 that defines a correction coefficient CE for correcting the power supply amount PI for each charge. When the environmental temperature T during charging of the battery 12 is high, the degree of deterioration of the battery 12 is greater than when the environmental temperature T is low.

[0033] Therefore, when the environmental temperature T is equal to or higher than a predetermined value T0, the amount of power supply PI for each charge to the battery 12 is multiplied by a correction coefficient CE0 greater than 1. When the environmental temperature T is lower than the predetermined value T0, the value of the correction coefficient CE is 1. In other words, no correction is made to the amount of power supply PI for each charge. The predetermined value T0 is predetermined to, for example, 30 degrees Celsius. The predetermined value T0 may be predetermined for each battery 12.

[0034] The table 114 is stored in advance in the storage unit 62. By accumulating the corrected power supply amount PI for each time in this manner, the total sum P of the past power supply amounts can be obtained.

[0035] 4A, 4B, and 4C, the estimation unit 74 corrects the total sum P of past power supply amounts. The estimation unit 74 calculates an index value IV, which is the ratio of the corrected total sum P of past power supply amounts to the total amount PD of discharge from the start of use of the battery 12 until the end of the life BL.

[0036] 5 is a diagram showing an example of a table 120 used to estimate the deterioration level L of the battery 12. The deterioration level L of the battery 12 is divided into five levels, from level 1 to level 5. Level 1 is the smallest deterioration level L of the battery 12. Level 5 is the largest deterioration level L of the battery 12.

[0037] When the index value IV of the battery deterioration degree is greater than 0.9, the deterioration degree L of the battery 12 is level 5. Level 5 corresponds to the battery 12 reaching the time to be replaced. Note that the index value IV may be greater than 1. In this case, the deterioration degree L of the battery 12 is also level 5.

[0038] If the index value IV is greater than 0.8 and less than or equal to 0.9, the deterioration degree L of the battery 12 is level 4. Level 4 corresponds to the battery 12 being close to needing to be replaced. If the index value IV is greater than 0.6 and less than or equal to 0.8, the deterioration degree L of the battery 12 is level 3. Level 3 corresponds to the battery 12 being close to needing to be replaced.

[0039] When the index value IV is greater than 0.3 and equal to or less than 0.6, the deterioration degree L of the battery 12 is level 2. Level 2 corresponds to a period of time before the battery 12 needs to be replaced. When the index value IV is equal to or less than 0.3, the deterioration degree L of the battery 12 is level 1. Level 1 corresponds to a period of time when the battery 12 has just started to be used.

[0040] The table 120 is stored in advance in the storage unit 62. The estimation unit 74 estimates the deterioration degree L of the battery 12 based on the table 120. That is, the estimation unit 74 estimates the deterioration degree L of the battery 12 in accordance with the calculated index value IV. The output unit 76 supplies information indicating the deterioration degree L of the battery 12 estimated by the estimation unit 74 to the terminal device 50 via the communication network 30. The terminal device 50 displays the information indicating the deterioration degree L of the battery 12 on a display screen provided on the terminal device 50.

[0041] 6 is a diagram showing an example of a screen display of the terminal device 50 on which information indicating the estimated deterioration level L of the battery 12 is output. FIG. 6 shows an example of a screen display when the deterioration level L of the battery 12 is estimated to be level 5. A message 142 and a message 144 are displayed on the screen 140 of the terminal device 50. The message 142 indicates the deterioration level L of the battery 12.

[0042] In the example shown in Fig. 6, a message 142 is displayed indicating that the deterioration level L of the battery 12 is level 5. A message 144 indicates notification content according to the deterioration level L of the battery 12. In the example shown in Fig. 6, a message 144 is displayed indicating that it is time to replace the battery.

[0043] In this way, even a party other than the manufacturer of the mobile object 10, such as a user of the mobile object 10, can easily understand the deterioration degree L of the battery 12. For example, the deterioration degree estimation device 20 is also highly convenient for businesses that evaluate the value of the mobile object 10 by taking into account the deterioration degree L of the battery 12, such as an insurance company for the mobile object 10 or a second-hand goods distributor that handles the mobile object 10.

[0044] 7 is a flowchart showing the procedure of the degradation degree estimation process performed by the degradation degree estimation device 20 of the battery 12. This procedure is performed, for example, by the processing circuit 60 of the degradation degree estimation device 20 executing a program stored in the storage unit 62. When this procedure starts, in step S10, the acquisition unit 72 acquires a charge notification signal supplied from the charging device 40 via the communication network 30.

[0045] The charge notification signal includes the mobile object ID of the mobile object 10, the remaining battery capacity of the battery 12, and the environmental temperature T of the environment where charging was performed. A record 102 including the date and time of charging, the remaining first battery capacity at the start of charging, the remaining second battery capacity at the completion of charging, and the environmental temperature T is recorded in the storage unit 62. The multiple records 102 configure charging history data 100. In step S12, the acquisition unit 72 calculates the amount of power supply PI for each charge to the battery 12 based on the charging history data 100, and acquires the power supply amount information.

[0046] In step S14, the acquisition unit 72 acquires environmental temperature information for each charge of the battery 12, based on the charge history data 100. In step S16, the estimation unit 74 corrects the power supply amount PI for each charge, using the table 114, based on the power supply amount information and the environmental temperature information. In step S18, the estimation unit 74 calculates the sum P of past power supply amounts by integrating the power supply amounts PI for each charge corrected in step S16.

[0047] In step S20, the estimation unit 74 counts the number of times N the battery 12 has been charged based on the number of records 102 in the charging history data 100. In step S22, the estimation unit 74 counts the number of times a low remaining capacity state has occurred. The estimation unit 74 calculates a ratio R of the number of times a low remaining capacity state has occurred to the number of times N the battery has been charged. In step S24, the estimation unit 74 corrects the number of times N the battery has been charged using the table 112 based on the ratio R of the number of times a low remaining capacity state has occurred.

[0048] In step S26, the estimation unit 74 corrects the total amount of power supply P calculated in step S18 using the table 110, based on the number of charging times N corrected in step S24. In step S28, the estimation unit 74 calculates an index value IV of the degree of deterioration L of the battery 12, based on the total amount of power supply P corrected in step S26. In step S30, the estimation unit 74 estimates the degree of deterioration L of the battery 12, based on the index value IV calculated in step S28, using the table 120. When the processing of step S30 is completed, this processing procedure ends.

[0049] [Variations] The above embodiment may be modified as follows.

[0050] FIG. 8 is a diagram showing how a charging card 160 is inserted into the insertion port 150 of the charging device 40. When the charging device 40 charges the battery 12 provided in the mobile object 10, the user inserts the charging card 160 into the insertion port 150 of the charging device 40. The charging card 160 stores the mobile object ID of the mobile object 10 and charging history data of the mobile object 10. The charging history data stored in the charging card 160 is the same as the charging history data 100 shown in FIG. 3. A plurality of records are stored in the charging history data. Each time the charging device 40 charges the battery 12, one record is stored.

[0051] The acquisition unit 72 of the deterioration degree estimation device 20 for the battery 12 reads out the charging history data recorded on the charging card 160 via the communication network 30. The acquisition unit 72 acquires the power supply amount information and the environmental temperature information included in the read charging history data. The processing performed by the estimation unit 74 and the output unit 76 is the same as that of the deterioration degree estimation device 20 according to the above-described embodiment.

[0052] [Inventions Obtained from the Embodiments] The invention that can be understood from the above-described embodiment and modifications will be described below.

[0053] (1) A deterioration degree estimation device (20) includes an acquisition unit (72) that acquires, each time a charging device (40) charges a battery (12) provided in a mobile object (10), power supply amount information regarding the power supply amount (PI) to the battery and environmental temperature information regarding the environmental temperature (T) that is the temperature of the environment in which the battery is charged, and an estimation unit (74) that estimates a deterioration degree (L) of the battery based on a number of charging times (N) that is the number of times the battery has been charged, the power supply amount information, and the environmental temperature information. This provides a highly convenient deterioration degree estimation device. This deterioration degree estimation device makes it possible to easily grasp the deterioration degree of the battery. Therefore, it is possible to easily evaluate the value of the mobile object taking the deterioration degree of the battery into consideration.

[0054] (2) The amount of power supply may be calculated based on a first remaining battery capacity, which is the remaining capacity of the battery when the charging of the battery is started, and a second remaining battery capacity, which is the remaining capacity of the battery when the charging of the battery is completed. This allows the amount of power supply to the battery to be obtained and the degree of battery degradation to be estimated.

[0055] (3) The estimation unit may estimate the deterioration level of the battery based on the number of charges, the power supply amount information, the environmental temperature information, and a low remaining charge state occurrence count, which is the number of times a low remaining charge state occurred, in which the first battery remaining charge fell below a remaining charge lower limit value for suppressing deterioration of the battery. This makes it possible to more accurately estimate the deterioration level of the battery.

[0056] (4) The deterioration degree estimation device may further include an output unit (76) that outputs information indicating the deterioration degree estimated by the estimation unit, thereby making it easier for a user to understand the estimation result of the deterioration degree of the battery.

[0057] (5) The acquisition unit may acquire the power supply amount information and the environmental temperature information from the charging device via a communication network (30). This allows the deterioration degree estimation device to be installed in a location away from the mobile object and the charging device.

[0058] (6) The power supply amount information and the environmental temperature information may be recorded on a charging card (160) inserted into the charging device, and the acquiring unit may acquire the power supply amount information and the environmental temperature information read from the charging card via a communication network. This makes it possible to easily acquire the power supply amount information and the environmental temperature information.

[0059] (7) A deterioration degree estimation method includes: an acquisition step of acquiring, each time a battery (12) provided in a mobile object (10) is charged by a charging device (40), power supply amount information regarding the power supply amount (PI) to the battery and environmental temperature information regarding the environmental temperature (T) that is the temperature of the environment where the battery is charged; and an estimation step of estimating a deterioration degree (L) of the battery based on a charge count (N) that is the number of times the battery has been charged, the power supply amount information, and the environmental temperature information. This provides a highly convenient deterioration degree estimation device. This deterioration degree estimation device makes it possible to easily grasp the deterioration degree of the battery. Therefore, it is possible to easily evaluate the value of the mobile object taking the deterioration degree of the battery into consideration.

[0060] (8) The program causes a computer to execute the following steps each time a battery (12) provided in a mobile object (10) is charged by a charging device (40): acquiring power supply amount information regarding the power supply amount (PI) to the battery and environmental temperature information regarding the environmental temperature (T) that is the temperature of the environment in which the battery is charged; and estimating a deterioration degree (L) of the battery based on a number of charges (N) that is the number of times the battery has been charged, the power supply amount information, and the environmental temperature information. This provides a highly convenient deterioration degree estimation device. This deterioration degree estimation device makes it possible to easily grasp the deterioration degree of the battery. Therefore, it is possible to easily evaluate the value of the mobile object taking the deterioration degree of the battery into consideration.

[0061] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0062] 10...Mobile object 12...Battery 20...Deterioration degree estimation device 30...Communication network 40...Charging device 50...Terminal device 60... Processing circuit 62... Storage unit 72...Acquisition part 74...Estimation part 76...Decision unit 100...Charging history data 102...Record 110, 112, 114, 120...tables 140...Screen 142, 144...Message 150...insertion slot 160...charging card

Claims

1. an acquisition unit that acquires power supply amount information relating to the amount of power supplied to the battery and environmental temperature information relating to the environmental temperature that is the temperature of the environment in which the battery is charged, every time the battery provided in the mobile object is charged by a charging device; an estimation unit that estimates a deterioration degree of the battery based on a charge count, which is the number of times the battery has been charged, the power supply amount information, and the environmental temperature information; A deterioration degree estimation device comprising:

2. 2. The deterioration degree estimation device according to claim 1, A deterioration degree estimation device in which the amount of power supply is calculated based on a first battery remaining capacity, which is the remaining capacity of the battery when the charging of the battery is started, and a second battery remaining capacity, which is the remaining capacity of the battery when the charging of the battery is completed.

3. 3. The deterioration degree estimation device according to claim 2, The estimation unit estimates the degree of deterioration of the battery based on the number of charges, the power supply amount information, the environmental temperature information, and the number of occurrences of a low remaining charge state, which is the number of times a low remaining charge state occurred in which the first battery remaining charge fell below a remaining charge lower limit value for suppressing deterioration of the battery.

4. 2. The deterioration degree estimation device according to claim 1, The deterioration degree estimation device further comprises an output unit that outputs information indicating the deterioration degree estimated by the estimation unit.

5. The deterioration degree estimation device according to any one of claims 1 to 4, The acquisition unit acquires the power supply amount information and the environmental temperature information from the charging device via a communication network.

6. The deterioration degree estimation device according to any one of claims 1 to 4, the power supply amount information and the environmental temperature information are recorded on a charging card inserted into the charging device; The acquisition unit acquires the power supply amount information and the environmental temperature information read from the charging card via a communication network.

7. an acquiring step of acquiring power supply amount information relating to the amount of power supplied to the battery and environmental temperature information relating to the environmental temperature, which is the temperature of the environment in which the battery is charged, every time the battery provided in the mobile object is charged by a charging device; an estimation step of estimating a degree of deterioration of the battery based on a number of times the battery has been charged, the power supply amount information, and the environmental temperature information; A deterioration degree estimation method comprising:

8. an acquiring step of acquiring power supply amount information relating to the amount of power supplied to the battery and environmental temperature information relating to the environmental temperature, which is the temperature of the environment in which the battery is charged, every time the battery provided in the mobile object is charged by a charging device; an estimation step of estimating a degree of deterioration of the battery based on a number of times the battery has been charged, the power supply amount information, and the environmental temperature information; A program that causes a computer to execute the following.

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