Charging control device, charged device, charging control method, and program

Abstract

To provide a charging control device, a method, and a program capable of controlling charging according to a state of a secondary battery.SOLUTION: In a charging control system, in which a charged device and a charging device are electrically connected by a connector and a charging control device and a charging device are connected so as to be able to communicate with each other via a communication network using wireless communication, the charging control device 10 has a control unit having an acquisition unit, a score calculating unit, a determining unit, and a transmitting unit. The acquisition unit acquires history information, which is history that may be a cause of deterioration of a secondary battery, from a charged device 70. The score calculating unit calculates a score for a prescribed value of a charging current of the secondary battery by using the acquired history information. The determining unit determines the charging current by multiplying the prescribed value of the charging current by the calculated score. The transmitting unit transmits a control signal for charging of the secondary battery by the determined charging current to the charging device.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a charge control device, a charged device, a charge control method, and a program. [Background technology]

[0002] A technique for suppressing deterioration of a secondary battery due to an increase in internal temperature during charging is disclosed in Patent Document 1. The secondary battery charging device described in Patent Document 1 obtains the temperature of the secondary battery using charging current data and charging voltage data collected during charging. The secondary battery charging device controls the charging current so that the temperature of the secondary battery falls within a predetermined temperature range. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 159031 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology described in Patent Document 1 charges the secondary battery according to the temperature during charging. However, the secondary battery deteriorates due to factors other than the temperature during charging. In order to suppress deterioration of the secondary battery and further extend its life, it is necessary to charge the secondary battery according to its condition.

[0005] An object of the present disclosure is to provide a charge control device, a charged device, a charge control method, and a program that enable charge control according to the state of a secondary battery. [Means for solving the problem]

[0006] A charging control device of one embodiment of the present disclosure includes a history information acquisition unit that acquires history from a charged device that may be a cause of deterioration of a secondary battery, a score calculation unit that uses the acquired history information to calculate a score for a specified value of a charging current for the secondary battery, a determination means that determines the charging current by multiplying the specified value of the charging current by the calculated score, and a transmission unit that transmits a control signal to the charging device for charging the secondary battery with the charging current.

[0007] A charged device of one embodiment of the present disclosure includes a secondary battery, a sensor for acquiring information regarding the status of the charged device, a memory for storing the history information, and a control unit that stores the history information in the memory based on the detection result of the sensor and transmits the history information stored in the memory to the charging control device described in any one of claims 1 to 7.

[0008] In one embodiment of the charging control method of the present disclosure, a computer acquires historical information from a charged device, which is history that could be a factor in deterioration of a secondary battery, uses the acquired historical information to calculate a score for a specified value of the charging current of the secondary battery, determines the charging current by multiplying the specified value of the charging current by the calculated score, and transmits a control signal to a charging device to charge the secondary battery with the charging current.

[0009] A program of one embodiment of the present disclosure causes a computer to perform the following processes: acquire historical information from a charged device, which is history that could be a factor in deterioration of a secondary battery; use the acquired historical information to calculate a score for a specified value of the charging current of the secondary battery; determine the charging current by multiplying the specified value of the charging current by the calculated score; and transmit a control signal to a charging device for charging the secondary battery with the charging current. Effect of the Invention

[0010] According to the present disclosure, it is possible to provide a charge control device, a charged device, a charge control method, and a program that enable charge control according to the state of a secondary battery. [Brief description of the drawings]

[0011] [Figure 1] 1 is a conceptual diagram for explaining an overview of a charge control system according to the present disclosure. [Diagram 2] 1 is a block diagram showing an example of a configuration of a charging control system according to the present disclosure. [Diagram 3] 1 is a block diagram showing an example of a configuration of a charging control device according to the present disclosure. [Figure 4] 5A to 5C are diagrams illustrating an example of state information, environmental information, and history information acquired by an acquisition unit. [Diagram 5] 13 is an example of a state information conversion score table for converting parameters included in state information into scores. [Figure 6] 13 is an example of a temperature conversion score table for converting parameters included in environmental information into scores. [Figure 7] 13 is an example of a history information conversion score table for converting parameters included in history information into scores. [Figure 8] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 9] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 10] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 11] 1 is a block diagram showing an example of a configuration of a charging control system according to the present disclosure. [Figure 12] 1 is a block diagram showing an example of a configuration of a charging control system according to the present disclosure. [Figure 13] 4 is a conceptual diagram illustrating an example of an alarm process performed by an alarm processor. FIG. [Figure 14] 1 is a block diagram showing an example of a configuration of a charging control device according to the present disclosure. [Figure 15] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 16] 1 is a block diagram showing an example of a configuration of a charging control system according to the present disclosure. [Figure 17] 1 is a block diagram showing an example of a configuration of a charging control device according to the present disclosure. [Figure 18] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 19] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 20] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Figure 21] 1 is a block diagram showing an example of a configuration of a charging control device according to the present disclosure. [Figure 22] 4 is a flowchart illustrating an example of an operation of a charging control device according to the present disclosure. [Diagram 23] 1 is a block diagram showing an example of a configuration of a charged device in the present disclosure. [Figure 24] 1 is a block diagram showing an example of a configuration of a charging device according to the present disclosure. [Diagram 25] FIG. 2 is a block diagram showing an example of a hardware configuration for executing control and processing in each embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. The embodiments described below are limited in a manner that is technically preferable for implementing the present disclosure, but the scope of the invention is not limited to the following. In all the drawings used to explain the following embodiments, the same reference numerals are used for similar parts unless otherwise specified. In the following embodiments, repeated explanations of similar configurations and operations may be omitted.

[0013] [First embodiment] First, a charge control system according to a first embodiment will be described with reference to the drawings. The charge control system according to the present embodiment controls a charging current for a secondary battery such as a lithium ion battery.

[0014] (overview) Fig. 1 is a conceptual diagram for explaining an outline of a charging control system according to the present disclosure. Note that Fig. 1 is a diagram for explaining an outline of a charging control system, and does not limit the shape or connection method of each component.

[0015] The charge control system 1 includes a charge control device 10, a charged device 70, and a charging device 80. The charging device 80 is electrically connected to an external power source (not shown). The charged device 70 and the charging device 80 are electrically connected by a connector (not shown). The charge control device 10 and the charging device 80 are communicatively connected via a communication network NW using wireless communication. In FIG. 1, the charge control device 10 and the charging device 80 are connected via the communication network NW using wireless communication, but this is just one example. For example, the charge control device 10 and the charging device 80 may be connected by a wired connection.

[0016] The charged device 70 is a device that is driven by a secondary battery (not shown) as a power source. In this embodiment, the secondary battery is realized by a lithium ion battery, but this is one example. For example, the secondary battery may be realized by a lithium ion polymer secondary battery or a lead storage battery. Also, in this embodiment, the secondary battery is charged by a constant voltage constant current charging method, but this is also one example. For example, the secondary battery may be charged by a constant current charging method.

[0017] The charging device 80 is a charging device that charges a secondary battery included in the charged device 70. For example, the charging device 80 is realized by an AC adapter or a cradle on which the charged device 70 can be placed. The cradle may have a wireless charging function. The charging device 80 is connected to the external power source 100 and the charged device 70.

[0018] The charge control device 10 is a device that controls a charging current when charging a secondary battery. In FIG. 1, the charge control device 10 is an independent device, but this is just one example. The charge control device 10 may be included in the charging device 80. The charge control device 10 controls the charging current using parameters included in degradation factor information including degradation factors of the secondary battery. The degradation factor information includes at least one of state information, environmental information, and history information of the charged device 70. The state information is information that indicates the degradation state of the secondary battery. The environmental information is an environmental factor among the degradation factors of the secondary battery. The history information is a history that may be a degradation factor of the secondary battery. Details of the state information, environmental information, and history information will be described later.

[0019] (composition) Fig. 2 is a block diagram showing an example of the configuration of a charge control system according to the present disclosure. In Fig. 2, the charge control system 1 includes a charge control device 10, a charged device 70, and a charging device 80. Power is supplied to the charge control system 1 from an external power source 100.

[0020] The external power source 100 is a power source that supplies power to the charged device 70. The external power source 100 is electrically connected to the charging device 80 via a power cable. The charging device 80 is also electrically connected to the charged device 70 via a charging cable or a connection terminal of the charging device 80. When the charging device 80 has a wireless charging function, the charged device 70 is connected to the charged device 70 without going through a charging cable or a connection terminal of the charging device 80. In this way, power is supplied from the external power source 100 to the charged device 70.

[0021] [Charged device] The charged device 70 has an input connector 71, a control unit 72, a sensor 73, a memory 74, a secondary battery 75, and a remaining charge monitor unit 76. The charged device 70 is driven by power supplied to the secondary battery 75.

[0022] The input connector 71 is a connector for electrically connecting the charging device 80 and the secondary battery 75. The input connector 71 is connected to the charging device 80 via a power cable. Power is supplied to the charged device 70 from the external power source 100 via the input connector 71.

[0023] The control unit 72 controls the storage of various information in the memory 74 based on the detection result of the sensor 73. The control unit 72 detects the fall of the charged device 70 by using the acceleration detected by the sensor 73. For example, the control unit 72 determines that the charged device 70 has fallen when the detected acceleration is equal to or greater than a predetermined value. When the control unit 72 detects the fall, it stores a log of the fall in the memory 74 as a fall history.

[0024] The sensor 73 is a sensor for acquiring information regarding the state of the charged device 70. The sensor 73 has a pressure sensor 73-1, an acceleration sensor 73-2, an ambient temperature sensor 73-3, and an environment temperature sensor 73-4.

[0025] The pressure sensor 73-1 is a sensor for detecting a thickness change due to the expansion of the secondary battery 75. The thickness change of the secondary battery 75 refers to an increase in thickness based on the initial thickness of the secondary battery 75. For example, the pressure sensor 73-1 detects a thickness change of the secondary battery 75 in the following procedure. The pressure sensor 73-1 is installed so as to contact the surface of the secondary battery 75 and the exterior part (not shown) of the charged device 70. The pressure sensor 73-1 detects the force with which the secondary battery 75 presses the exterior part. When the secondary battery 75 expands, the force pressing the exterior part increases. The pressure sensor 73-1 calculates a thickness change of the secondary battery 75 according to the force pressing the exterior part. In this embodiment, the pressure sensor 73-1 detects a thickness change due to the expansion of the secondary battery 75, but this is one example. The pressure sensor 73-1 may be configured to simply detect the force with which the secondary battery 75 presses the exterior part.

[0026] The acceleration sensor 73-2 is a sensor for detecting a fall of the charged device 70. The control unit 72 detects the fall using the acceleration detected by the acceleration sensor 73-2.

[0027] The ambient temperature sensor 73-3 is a sensor for detecting the ambient temperature of the secondary battery 75. For example, the ambient temperature sensor 73-3 is realized by an NTC thermistor (Negative Temperature Coefficient Thermistor) or a thermocouple.

[0028] The environmental temperature sensor 73-4 is a sensor for detecting the environmental temperature of the charged device 70. The environmental temperature is the temperature of the outside air flowing into the charged device 70. For example, the environmental temperature sensor 73-4 is realized by an NTC thermistor or a thermocouple.

[0029] The memory 74 stores history information including history that may be a deterioration factor of the secondary battery 75. The deterioration factors of the secondary battery 75 include dropping the secondary battery 75, charging the secondary battery 75 under a high temperature condition (high temperature charging), charging the secondary battery 75 under a low temperature condition (low temperature charging), and leaving the secondary battery 75 in a state where the remaining charge is zero. High temperature charging refers to charging in a state where the environmental temperature or the surrounding temperature of the secondary battery 75 is higher than a preset high temperature reference temperature. Low temperature charging refers to charging in a state where the environmental temperature or the surrounding temperature is lower than a preset low temperature reference temperature. The high temperature reference temperature and the low temperature reference temperature are set in advance. For example, the high temperature reference temperature and the low temperature reference temperature are specified values ​​set at the time of shipment from the factory. For example, the high temperature reference temperature and the low temperature reference temperature may be changeable depending on environmental factors such as the outside air temperature. For example, the high temperature reference temperature and the low temperature reference temperature may be set by the user. The memory 74 stores the number of drops, the high temperature charging time, the low temperature charging time, and the leaving time in a state where the remaining charge is zero as the history information. The memory 74 also stores the discharge amount of the secondary battery 75 when the maximum battery capacity is 100%.

[0030] The secondary battery 75 is a power source for the charged device 70. As described above, the secondary battery 75 in this embodiment is realized by a lithium ion battery. A charging current is supplied to the secondary battery 75 from the input connector 71. The secondary battery 75 stores the supplied charging current. The power stored in the secondary battery 75 is used to drive the charged device 70.

[0031] The remaining charge monitoring unit 76 monitors the amount of charge stored in the secondary battery 75. The amount of charge stored in the secondary battery 75 corresponds to the remaining charge of the secondary battery 75. When the remaining charge of the secondary battery 75 runs out, the remaining charge monitoring unit 76 measures the time when there is no remaining charge as the no remaining charge time. The no remaining charge time corresponds to the time when the battery is left in a state where there is no remaining charge. The remaining charge monitoring unit 76 stores the measured no remaining charge time in the memory 74.

[0032] [Charging device] The charging device 80 is a charging device that charges the secondary battery 75. The charging device 80 has an input connector 81, a control unit 82, and an output connector 83.

[0033] The input connector 81 is a connector for electrically connecting the external power source 100 and the charging device 80. The input connector 81 is connected to the external power source 100 via a power cable. The input connector 81 is supplied with power from the external power source 100.

[0034] The control unit 82 receives the value of the charging current from the charging control device 10. The control unit 82 controls the amount of power supplied to the secondary battery 75 using the value of the charging current received from the charging control device 10. The control unit 82 controls the amount of power supplied from the output connector 83 so as to supply the charging current of the received value to the secondary battery 75. The control unit 82 may control the amount of power supplied to the input connector 71. In addition, the control unit 82 transmits information of the charged device 70 to the charging control device 10 in response to an instruction from the charging control device 10. The control unit 82 transmits information acquired by the sensor 73 to the charging control device 10. The control unit 82 transmits the maximum battery capacity and history information stored in the memory 74 to the charging control device 10. The control unit 82 transmits the remaining charge monitored by the remaining charge monitoring unit 76 to the charging control device 10. In addition, the control unit 82 updates the information stored in the charged device 70 in response to an instruction from the charging control device 10. The control unit 82 updates the maximum battery capacity and history information stored in the memory 74.

[0035] The output connector 83 is a connector for electrically connecting the charging device 80 and the charged device 70. The output connector 83 is connected to the input connector 71 of the charged device 70 via a charging cable. The output connector 83 supplies power from the external power supply 100 to the charged device 70 via the input connector 71.

[0036] [Charging control device] 3 is a block diagram showing an example of the configuration of a charge control device in the present disclosure. The charge control device 10 is a device that controls a charging current used to charge a secondary battery 75. The charge control device 10 includes an acquisition unit 11, a score calculation unit 12, a determination unit 13, a transmission unit 14, a charging method determination unit 15, and an update unit 16. The charge control device 10 is connected to a charging device 80 via a communication network NW.

[0037] The acquisition unit 11 acquires deterioration factor information including deterioration factors of the secondary battery 75. The acquisition unit 11 acquires the deterioration factor information via the control unit 82. The acquisition unit 11 acquires the state information of the secondary battery 75 as the deterioration factor information. As described above, the state information is information indicating the deterioration state of the secondary battery 75. For example, the state information includes a maximum battery capacity which is a value indicating the deterioration of the battery capacity of the secondary battery. The maximum battery capacity is a value indicating the degree of deterioration of the battery capacity when the initial value is set as a reference (100%). The maximum battery capacity is expressed as a percentage. The value of the maximum battery capacity becomes smaller as deterioration progresses. For example, the maximum battery capacity is calculated using the discharge amount and the discharge time when the secondary battery 75 that has completed charging is discharged for a certain period of time. The larger the discharge amount in the certain period of time, the more the deterioration of the secondary battery 75 progresses. The state information may include a thickness change value of the secondary battery 75 in addition to the maximum battery capacity. In the following description, each piece of information included in the state information is also referred to as a parameter.

[0038] The acquisition unit 11 may acquire environmental information as the deterioration factor information. The environmental information is an environmental factor among the deterioration factors of the secondary battery 75. The environmental information indicates at least one of the ambient temperature and the environmental temperature. In the following description, each piece of information included in the environmental information is also referred to as a parameter.

[0039] The acquisition unit 11 may acquire history information as the deterioration factor information. As described above, the history information includes history that may be a deterioration factor of the secondary battery 75. For example, the history information includes at least one of the number of times the secondary battery 75 has been dropped, the high-temperature charging time of the secondary battery 75, the low-temperature charging time of the secondary battery 75, or the time when the secondary battery 75 is out of charge. In the following description, each piece of information included in the history information is also referred to as a parameter.

[0040] The acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitoring unit 76. The acquisition unit 11 also acquires a value for calculating the maximum battery capacity of the secondary battery 75. For example, the acquisition unit 11 acquires the discharge amount of the secondary battery 75 after a certain time has elapsed since the transmission unit 14 transmitted a control signal for discharging the secondary battery 75 for a certain time, as a value for calculating the maximum battery capacity.

[0041] The score calculation unit 12 calculates a score for determining a charging current for the secondary battery 75, using the deterioration factor information (at least one of the state information, the environmental information, and the history information) acquired by the acquisition unit 11. The score calculation unit 12 converts each parameter acquired by the acquisition unit 11 into a score by multiplying the value of each parameter by a predetermined coefficient.

[0042] 5 to 7 are conceptual diagrams showing examples of score tables referred to by the score calculation unit 12 in calculating the score. For example, the score calculation unit 12 converts each parameter into a score by referring to score tables such as those shown in FIGS. 5 to 7. The score calculation unit 12 calculates the total of each score as a percentage of the specified value of the charging current. Therefore, in this embodiment, the score is expressed in units of %. When the score exceeds 100, the score calculation unit 12 sets the value of the score to 100 in order to prevent the charging current from exceeding the specified value.

[0043] Fig. 4 is a diagram showing an example of the state information, the environment information, and the history information acquired by the acquisition unit 11. In this specific example, the score calculation unit 12 calculates the score using the information shown in Fig. 4. For example, the score calculation unit 12 may calculate the score without using any of the information shown in Fig. 4. Furthermore, the score calculation unit 12 may calculate the score in a state where other information is added.

[0044] FIG. 5 is an example of a state information conversion score table for converting parameters included in state information into scores. The score calculation unit 12 calculates the score of each state information by multiplying the parameters of the state information acquired by the acquisition unit 11 by a coefficient predetermined for each parameter. The coefficients shown in FIG. 5 are only examples, and may be other values. In the example shown in FIG. 4, the value of the maximum battery capacity is 90 and the coefficient is 1. With reference to the state information conversion score table of FIG. 5, when the value of the maximum battery capacity is 90 and the coefficient is 1, the score of the maximum battery capacity is 90%. Also, in the example shown in FIG. 4, the value of the thickness change value is 0.5 and the coefficient is -10. With reference to the state information conversion score table of FIG. 5, when the value of the thickness change value is 0.5 and the coefficient is -10, the score of the thickness change value is -5%.

[0045] FIG. 6 is an example of a temperature conversion score table for converting parameters included in the environmental information into a score. The score calculation unit 12 converts the parameters of the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75 into a score using the temperature conversion score table shown in FIG. 6. The scores shown in FIG. 6 are only an example, and may be other values. For example, referring to the temperature conversion score table of FIG. 6, when the ambient temperature is 40 degrees and the environmental temperature is 30 degrees, the score is −10% (=−10%+0%). For example, referring to the temperature conversion score table of FIG. 6, when the ambient temperature is 20 degrees and the environmental temperature is 25 degrees, the score is 10% (=5%+5%). In the example shown in FIG. 4, the ambient temperature is 30 degrees and the environmental temperature is 30 degrees. Referring to the temperature conversion score table of FIG. 6, when the ambient temperature is 30 degrees and the environmental temperature is 30 degrees, the score is 0% (=0%+0%).

[0046] FIG. 7 is an example of a history information conversion score table for converting parameters included in history information into scores. The score calculation unit 12 calculates the score of each state information by multiplying the parameters of the history information acquired by the acquisition unit 11 by a coefficient predetermined for each parameter. The coefficients shown in FIG. 7 are only examples, and other values ​​may be used. In the example shown in FIG. 4, the value of the number of drops is 10 and the coefficient is −0.005, so the score of the number of drops is −0.05%. In the example shown in FIG. 4, the value of the time when there is no remaining charge is 50 and the coefficient is −0.01, so the score of the time when there is no remaining charge is −5%. In the example shown in FIG. 4, the value of the number of charges is 300 and the coefficient is −0.005, so the score of the number of charges is −1.5%. In the example shown in FIG. 4, the high temperature charging time is 30 and the coefficient is −0.002, so the score of the number of charges is −0.06%. In the example shown in FIG. 4, the low temperature charging time is 0 and the coefficient is −0.002, so the score for the number of charging times is 0%.

[0047] The score calculation unit 12 sums up the converted scores using the score tables shown in Figs. 5 to 7. In this specific example, the total score of each parameter is 82.89%. The score may be rounded up to an integer. For example, in this specific example, the score may be rounded up to 83%. The score may be rounded up to an integer. The score may be rounded down to an integer. The score may be expressed as a decimal indicating a ratio or a rate instead of a percentage. The score may be expressed as a ratio such as parts per thousand or parts per ten thousand.

[0048] The determination unit 13 determines the charging current according to the score calculated by the score calculation unit 12. The determination unit 13 determines the charging current by multiplying the specified value of the charging current by the score. For example, assume that the specified value of the charging current is 2A (Ampere) and the score determined by the score calculation unit 12 is 83%. In this case, the determination unit multiplies the specified value of the charging current, 2A, by 0.83, a decimal point indicating the score percentage, to determine the charging current to be 1.66A (=2A×0.83).

[0049] The transmitting unit 14 transmits a control signal for charging the secondary battery 75 with the charging current determined by the determining unit 13. The transmitting unit 14 transmits the determined charging current to the control unit 82 of the charging device 80 via the communication network NW. The control unit 82 controls the amount of power supplied from the output connector 83 according to the value of the received charging current. Furthermore, when the remaining charge of the secondary battery 75 reaches a predetermined charge amount, the transmitting unit 14 transmits a control signal for terminating the charging of the secondary battery 75. Hereinafter, the state in which the remaining charge amount reaches the predetermined charge amount is referred to as full charge. Thereafter, the transmitting unit 14 transmits a control signal for discharging for a certain period of time.

[0050] The charging method determination unit 15 determines the charging method of the secondary battery 75 using the remaining charge of the secondary battery 75 acquired by the acquisition unit 11. As described above, the secondary battery 75 of this embodiment is charged by a constant current constant voltage charging method. When the secondary battery 75 is charged by the constant current constant voltage charging method, it is determined in advance whether the constant current charging method or the constant voltage charging method is adopted according to the remaining charge of the secondary battery 75. A section of the remaining charge in which the constant current charging method is adopted is called a constant current charging section. A section of the remaining charge in which the constant voltage charging method is adopted is called a constant voltage charging section. The charging method determination unit 15 determines whether the secondary battery 75 is in a constant current charging section. If it is in a constant current charging section, the charging method determination unit 15 determines to charge the secondary battery 75 by a constant current charging method. If it is not in a constant current charging section, the charging method determination unit 15 determines to charge the secondary battery 75 by a constant voltage charging method. If the secondary battery 75 is charged by another charging method, the charging method determination unit 15 may be omitted.

[0051] The update unit 16 updates the maximum battery capacity and history information stored in the memory 74. As a process for updating the history information, each time charging is completed, the update unit 16 updates the value of the number of charging times stored in the memory 74. In addition, each time charging is completed, the update unit 16 checks whether or not high temperature charging has occurred. If high temperature charging has occurred, the update unit 16 updates the value of the high temperature charging time stored in the memory 74. Similarly, each time charging is completed, the update unit 16 checks whether or not low temperature charging has occurred. If low temperature charging has occurred, the update unit 16 updates the value of the low temperature charging time stored in the memory 74. The update unit 16 checks whether high temperature charging or low temperature charging has occurred, using the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75 acquired during charging.

[0052] The update unit 16 calculates the maximum battery capacity of the secondary battery 75 in the following procedure. Note that the calculation method of the maximum battery capacity shown below is an example and is not limited to this. First, the transmission unit 14 transmits a control signal for discharging the secondary battery 75 for a certain time. The discharge time is determined in advance by the user. The acquisition unit 11 acquires the discharge amount of the secondary battery 75 after the certain time has elapsed. The update unit 16 calculates the ratio of the discharge amount when the maximum battery capacity is 100% to the discharge amount acquired by the acquisition unit 11. The update unit 16 updates the memory 74 by multiplying the calculated ratio by 100 as the value of the maximum battery capacity.

[0053] (operation) Next, an example of the operation of the charge control device 10 in this embodiment will be described with reference to the drawings. Figs. 8 to 10 are flowcharts showing an example of the operation of the charge control device in the present disclosure. The charging device 80 in this embodiment charges the secondary battery 75 by a constant current constant voltage charging method, but this is just one example. For example, the charging device 80 may charge the secondary battery 75 by a constant current method. When charging by the constant current method, the charging control device 10 starts the process from step S11 in Fig. 9 without performing the operation shown in Fig. 8.

[0054] <Constant voltage charging section> The operation in the constant voltage charging section will be described with reference to Fig. 8. First, the acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitor unit 78 (step S1).

[0055] Next, the charging method determination unit 15 uses the remaining charge acquired in step S1 to determine the charging method of the secondary battery 75. The charging method determination unit 15 determines whether the remaining charge is in a constant current charging section (step S2). If it is in a constant current charging section (Yes in step S2), the charging method determination unit 15 performs the process shown in FIG.

[0056] If it is not the constant current charging section (No in step S2), charging method determination unit 15 determines to charge secondary battery 75 by the constant voltage charging method. Transmitter 14 transmits a control signal for charging secondary battery 75 at a predetermined voltage (step S3).

[0057] The acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitor 78 (step S19). The acquisition unit 11 repeats the process of step S19 until the remaining charge reaches a predetermined charge amount (No in step S20). That is, the acquisition unit 11 repeats the process of step S19 until the secondary battery 75 is fully charged. When the secondary battery 75 is fully charged (Yes in step S20), the transmission unit 14 transmits a control signal for ending charging (step S21). Thereafter, the charging control device 10 performs post-processing shown in FIG. 10 (step S22). After step S22, the charging control device 10 ends the series of processes. Details of step S22 will be described later.

[0058] <Constant current charging section> The operation in the constant current charging section will be described with reference to Fig. 9. When the remaining charge of secondary battery 75 is in the constant current charging section (Yes in step S2 in Fig. 8), acquisition unit 11 acquires status information as deterioration factor information (step S11). The status information includes the maximum battery capacity of secondary battery 75 and the thickness change value of secondary battery 75. Note that, although the above-mentioned information is acquired as the status information in this operation description, information other than the above-mentioned information may be included in the status information, or any information may not be included.

[0059] Next, the acquisition unit 11 acquires environmental information as deterioration factor information (step S12). The environmental information includes the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75. Note that, in this operation description, the above-mentioned information is acquired as the environmental information, but the environmental information may include information other than the above-mentioned information, or any information may not be included.

[0060] Next, the acquisition unit 11 acquires history information as deterioration factor information (step S13). The history information includes the number of times the secondary battery 75 has been dropped, the high-temperature charging time of the secondary battery 75, the low-temperature charging time of the secondary battery 75, and the time when the secondary battery 75 is out of charge. Note that, in this operation description, the above-mentioned information is acquired as the history information, but the history information may include information other than the above-mentioned information, or may not include any of the information. Also, the acquisition unit 11 may execute at least one of the processes of steps S11 to S13. Also, the order of the processes of steps S11, S12, and S13 may be interchanged.

[0061] Next, the score calculation unit 12 calculates a score for determining the charging current of the secondary battery 75 using the deterioration factor information (at least one of the state information, the environmental information, and the history information) acquired by the acquisition unit 11 (step S14). The score calculation unit 12 converts each parameter acquired by the acquisition unit 11 into a score by referring to score tables such as those shown in Figs. 5 to 7. The score calculation unit 12 calculates the total score as a ratio to a specified value of the charging current.

[0062] If the score calculated in step S14 exceeds 100 (No in step S15), the score calculation unit 12 sets the value of the score to 100 (step S16).

[0063] If the score calculated in step S14 is 100 or less (Yes in step S15), the determination unit 13 determines the charging current according to the score calculated by the score calculation unit 12 (step S17). The determination unit 13 determines the charging current by multiplying a prescribed value of the charging current by the score.

[0064] Next, the transmitting unit 14 transmits a control signal for charging the secondary battery 75 with the charging current determined by the determining unit 13 (step S18).

[0065] The acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitor 78 (step S19). The acquisition unit 11 repeats the process of step S19 until the secondary battery 75 is fully charged (No in step S20). When the secondary battery 75 is fully charged (Yes in step S20), the transmission unit 14 transmits a control signal to end charging (step S21). Thereafter, the charging control device 10 performs post-processing shown in FIG. 10 (step S22). After step S22, the charging control device 10 ends the process.

[0066] <Post-processing> The operation in the post-processing will be described with reference to Fig. 10. The transmitter 14 transmits a control signal for discharging for a certain period of time (step S221).

[0067] After a certain period of time has elapsed, the acquisition unit 11 acquires the discharge amount of the secondary battery 75. The update unit 16 calculates the ratio of the discharge amount when the maximum battery capacity is 100% to the discharge amount acquired by the acquisition unit 11. The update unit 16 updates the memory 74 by multiplying the calculated ratio by 100 as the value of the maximum battery capacity (step S222).

[0068] Next, the update unit 16 updates the value of the number of times of charging stored in the memory 74 (step S223). For example, the update unit 16 increments the value of the number of times of charging stored in the memory 74.

[0069] Next, the update unit 16 checks whether the current charging was high temperature charging or not (step S224). If it was not high temperature charging (No in step S224), the charge control device 10 proceeds to the process of step S226. If it was high temperature charging (Yes in step S224), the update unit 16 updates the high temperature charging time stored in the memory 74 (step S225). The update unit 16 adds the current charging time to the high temperature charging time stored in the memory 74.

[0070] Next, the update unit 16 checks whether the current charging was low temperature charging (step S226). If it was not low temperature charging (No in step S226), the post-processing of step S22 is terminated. If it was low temperature charging (Yes in step S226), the update unit 16 updates the low temperature charging time stored in the memory 74 (step S227). The update unit 16 adds the current charging time to the low temperature charging time stored in the memory 74 (step S228). After completing the process of step S228, the charge control device 10 terminates the post-processing of step S22.

[0071] When the process of step S22 is completed, the charge control device 10 ends the series of processes described above.

[0072] As described above, the charge control device of this embodiment includes an acquisition unit, a score calculation unit, a determination unit, and a transmission unit. The acquisition unit acquires history information from the charged device, which is history that may be a cause of deterioration of the secondary battery. The score calculation unit calculates a score for a specified value of the charging current of the secondary battery using the history information acquired by the acquisition unit 11. The determination unit determines the charging current of the secondary battery by multiplying the specified value of the charging current by the score calculated by the score calculation unit. The transmission unit transmits a control signal for charging the secondary battery with the charging current determined by the determination unit.

[0073] The charge control device of the present embodiment, configured as described above, can change the charging current in accordance with the history information of the secondary battery. In other words, the charge control device of the present embodiment can control charging in accordance with the state of the secondary battery.

[0074] In one aspect of this embodiment, the acquisition unit further acquires state information indicating the deterioration state of the secondary battery. The state information includes at least one of the maximum battery capacity or the thickness change value of the secondary battery, which is a value indicating the deterioration of the battery capacity of the secondary battery. When the battery capacity of the secondary battery is deteriorated, charging with a current when the secondary battery is not deteriorated is one factor that shortens the life of the secondary battery. The charge control device of this embodiment reduces the charging current according to the degree of deterioration of the battery capacity of the secondary battery and performs charging. In other words, the charge control device of this embodiment can charge the secondary battery while aiming to extend its life. In addition, the secondary battery expands as deterioration progresses. Therefore, as the deterioration of the secondary battery progresses, the thickness of the secondary battery changes. If a high charging current is applied in a state in which the thickness of the secondary battery has changed, there is a risk that the secondary battery will break down or the charged device will be damaged. By including the thickness change value of the secondary battery in the parameters that determine the charging current, charging with improved safety can be performed.

[0075] In one aspect of this embodiment, the acquisition unit further acquires environmental information, which is an environmental factor among the deterioration factors of the secondary battery. The environmental information includes at least one of the ambient temperature of the secondary battery and the environmental temperature of the secondary battery. Deterioration of the secondary battery accelerates when the secondary battery is charged at high temperature or low temperature. By including the ambient temperature and the environmental temperature of the secondary battery during charging in the parameters that determine the charging current, it is possible to prevent deterioration of the secondary battery and charge the battery while extending its life.

[0076] In one aspect of the present embodiment, the history information includes at least one of the following: a drop history of the secondary battery, a high-temperature charging time of the secondary battery, a low-temperature charging time of the secondary battery, a time when the secondary battery has no remaining charge, or the number of times the secondary battery has been charged. The risk of failure of a secondary battery increases when the secondary battery is damaged by an impact such as a drop. By including the drop history of the secondary battery in the parameters that determine the charging current, charging can be performed with improved safety. Also, as described above, the secondary battery deteriorates more quickly when it is charged at a high temperature or low temperature. Similarly, the secondary battery deteriorates more quickly when it is stored for a long period of time in a state where there is no remaining charge. By including the high-temperature charging time, low-temperature charging time, and time when there is no remaining charge of the secondary battery during charging in the parameters that determine the charging current, the charging current can be suppressed according to the degree of deterioration, and the secondary battery can be charged while extending its life.

[0077] In one aspect of this embodiment, the acquisition unit acquires the remaining charge of the secondary battery. The transmission unit transmits a control signal to terminate charging when the remaining charge reaches a charge amount predetermined by a user. The secondary battery deteriorates faster if charging is continued in a fully charged state. According to the charge control device of this embodiment, since charging is not continued in a fully charged state, deterioration of the secondary battery can be prevented and charging can be performed while extending the life of the battery.

[0078] In one aspect of this embodiment, the score calculation unit changes the score to 100 when the calculated score exceeds 100. The determination unit determines the charging current by multiplying a specified value of the charging current by the calculated score. The score calculation unit sets the score value to 100 even when the score exceeds 100. This prevents the charging current from exceeding the specified value, thereby preventing deterioration of the secondary battery and enabling charging to be performed with a longer life.

[0079] (Modification) In this embodiment, the charge control device 10 and the charging device 80 are connected to be able to communicate with each other via a communication network NW, but the configuration of the charge control system 1 is not limited to this. For example, the charge control device 10 and the charged device 70 may be connected to be able to communicate with each other via a communication network NW. FIG. 11 is a block diagram showing an example of the configuration of the charge control system in this modified example. In the case of the configuration shown in FIG. 11, instead of the control unit 82, the control unit 72 transmits information of the charged device 70 to the charge control device 10 in response to an instruction from the charge control device 10. In addition, the control unit 72 updates the information stored in the charged device 70 in response to an instruction from the charge control device 10.

[0080] [Second embodiment] Next, a charge control system and a charge control device according to this embodiment will be described with reference to the drawings. In the following description, the same parts as those in the first embodiment will be given the same reference numerals, and the description will be omitted as appropriate. The charge control device of this embodiment differs from the charge control device of the first embodiment in that, when the start condition for starting charging is not satisfied, a control signal for performing an alarm process is transmitted to the charged device or the charging device, and charging is not started. The start condition is that the ambient temperature and the environmental temperature of the secondary battery are within a specified range, and the thickness change value is less than a specified value.

[0081] (composition) 12 is a block diagram showing an example of the configuration of a charging control system in the present disclosure. The charging control system 2 in this embodiment includes a charging control device 20, an external power source 100, a charged device 70-2, and a charging device 80-2. The charged device 70-2 has an alarm processing unit 77. Similarly, the charging device 80-2 has an alarm processing unit 84. At least one of the charged device 70-2 and the charging device 80-2 may have an alarm processing unit. Therefore, the charging control system 2 does not need to have at least one of the alarm processing unit 77 and the alarm processing unit 84.

[0082] 13 is a conceptual diagram showing an example of the alarm processing performed by the alarm processing unit 77 and the alarm processing unit 84. An example of the alarm processing performed by the alarm processing unit 77 and the alarm processing unit 84 will be described with reference to FIG.

[0083] For example, the alarm processing unit 77 and the alarm processing unit 84 are realized by a light L. In this case, the alarm processing unit 77 and the alarm processing unit 84 perform the alarm processing by turning on or blinking the light L.

[0084] For example, in another example, the alarm processing unit 77 and the alarm processing unit 84 are realized by speakers. In this case, the alarm processing unit 77 and the alarm processing unit 84 output an alarm sound or a warning message via the speaker.

[0085] For example, in another example, the alarm processing unit 77 and the alarm processing unit 84 are realized by a display unit such as a display. In this case, the alarm processing unit 77 and the alarm processing unit 84 output a warning message M to the display unit. For example, as shown in FIG. 13, the warning message M may include a message indicating that charging cannot be performed, a message indicating the cause, and a message suggesting a method for solving the cause. The above-mentioned alarm processing is an example, and the alarm processing unit 77 and the alarm processing unit 84 may perform other alarm processing. For example, the alarm processing unit 77 and the alarm processing unit 84 may perform vibration or sound. Furthermore, the alarm processing unit 77 and the alarm processing unit 84 may be configured to perform a combination of the above-mentioned alarm processing.

[0086] 14 is a block diagram showing an example of the configuration of a charging control device in the present disclosure. A charging control device 20 in this embodiment includes an acquisition unit 11, a score calculation unit 12, a determination unit 13, a transmission unit 14, a charging method determination unit 15, an update unit 16, a charging start determination unit 21, and an alarm instruction unit 22. The acquisition unit 11, the score calculation unit 12, the determination unit 13, the transmission unit 14, the charging method determination unit 15, and the update unit 16 are the same as those in the first embodiment, and therefore description thereof will be omitted.

[0087] The charging start determination unit 21 determines whether or not a start condition for starting charging of the secondary battery 75 is satisfied. If the start condition is satisfied, the charging start determination unit 21 starts charging. On the other hand, if the start condition is not satisfied, the charging start determination unit 21 does not start charging. In this case, the charging start determination unit 21 instructs the alarm instruction unit 22 to perform alarm processing. The start condition includes at least one of the following: the ambient temperature value of the secondary battery and the environmental temperature value are within a specified range, or the thickness change value is less than a specified value. The charging start determination unit 21 determines whether or not the start condition is satisfied as follows.

[0088] The charging start determination unit 21 determines that the start condition is satisfied when the values ​​of the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75 acquired by the acquisition unit 11 are within a predetermined specified range. For example, the charging start determination unit 21 determines that the start condition is satisfied when the ambient temperature of the secondary battery 75 and the environmental temperature acquired by the acquisition unit 11 are within a range of 0 to 40 degrees. Note that the specified range (0 to 40 degrees) of the ambient temperature and the environmental temperature described above is an example, and other ranges may be set.

[0089] The charging start determination unit 21 determines that the start condition is satisfied when the thickness change value of the secondary battery 75 acquired by the acquisition unit 11 is less than a predetermined specified value. For example, the charging start determination unit 21 determines that the start condition is satisfied when the thickness change value of the secondary battery 75 acquired by the acquisition unit 11 is less than 1.0 millimeter. Note that the above-mentioned specified values ​​(less than 1.0 millimeter) of the ambient temperature and the environment temperature are merely examples, and other values ​​may be set.

[0090] The alarm instruction unit 22 is an example of an alarm instruction means that transmits a control signal for performing alarm processing to at least one of the alarm processing unit 77 and the alarm processing unit 84 when the start condition is not satisfied. For example, the alarm instruction unit 22 transmits an instruction to blink a light, an instruction to sound a sound, or an instruction to output a warning message.

[0091] (operation) Next, an example of the operation of the charge control device 20 in this embodiment will be described with reference to the drawings. Note that the operation in the constant voltage charging section is the same as that in FIG. 8, and therefore the description in this embodiment will be omitted. Also, the operation in the post-processing is the same as that in FIG. 10, and therefore the description in this embodiment will be omitted. Hereinafter, the operation of the charge control device 20 in the constant current charging section will be described with reference to FIG. 15.

[0092] When the remaining charge of the secondary battery 75 is in the constant current charging section (Yes in step S2 in FIG. 8), the acquisition unit 11 acquires status information as deterioration factor information (step S201). The status information includes the maximum battery capacity of the secondary battery 75, the thickness change value of the secondary battery 75, the ambient temperature of the secondary battery 75, and the environmental temperature of the secondary battery 75. Note that, in this operation description, the above-mentioned information is acquired as the status information, but information other than the above-mentioned information may be included in the status information, or any information may not be included.

[0093] Next, the acquisition unit 11 acquires environmental information as deterioration factor information (step S202). The environmental information includes the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75. Note that, in this operation description, the above-mentioned information is acquired as the environmental information, but the environmental information may include information other than the above-mentioned information, or any information may not be included.

[0094] Next, the acquisition unit 11 acquires history information as deterioration factor information (step S203). The history information includes the number of times the secondary battery 75 has been dropped, the high-temperature charging time of the secondary battery 75, the low-temperature charging time of the secondary battery 75, and the time when the secondary battery 75 is out of charge. Note that, in this operation description, the above-mentioned information is acquired as the history information, but the history information may include information other than the above-mentioned information, or may not include any of the information. Also, the acquisition unit 11 may execute at least one of the processes of steps S201 to S203. Also, the order of the processes of steps S201, S202, and S203 may be interchanged.

[0095] Next, the charging start determination unit 21 determines whether or not a start condition for starting charging of the secondary battery 75 is satisfied (step S204). The charging start determination unit 21 determines that the start condition is satisfied when the values ​​of the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75 acquired by the acquisition unit 11 are within a predetermined specified range. Alternatively, the charging start determination unit 21 determines that the start condition is satisfied when the thickness change value of the secondary battery 75 acquired by the acquisition unit 11 is less than a predetermined specified value. When the charging start determination unit 21 determines that the start condition is not satisfied (No in step S204), the alarm instruction unit 22 transmits a control signal for performing alarm processing to at least one of the alarm processing unit 77 and the alarm processing unit 84 (step S205). When the process of step S205 is completed, the charging control device 20 ends the process.

[0096] If the charge start determination unit 21 determines that the start condition is not satisfied (Yes in step S204), the score calculation unit 12 calculates a score for determining the charging current of the secondary battery 75 using the deterioration factor information (at least one of the state information, the environmental information, and the history information) acquired by the acquisition unit 11 (step S206). The score calculation unit 12 converts each parameter acquired by the acquisition unit 11 into a score by referring to score tables such as those shown in Figs. 5 to 7. The score calculation unit 12 calculates the total score as a ratio to a specified value of the charging current.

[0097] If the score calculated in step S206 exceeds 100 (No in step S207), the score calculation unit 12 overwrites the score with 100 (step S208).

[0098] If the score calculated in step S206 is 100 or less (Yes in step S207), the determination unit 13 determines the charging current according to the score calculated by the score calculation unit 12 (step S209). The determination unit 13 determines the charging current by multiplying a prescribed value of the charging current by the score.

[0099] Next, the transmitting unit 14 transmits a control signal for charging the secondary battery 75 with the charging current determined by the determining unit 13 (step S210).

[0100] The acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitor 78 (step S211). The acquisition unit 11 repeats the process of step S211 until the remaining charge reaches a charge amount predetermined by the user (No in step S212). That is, the acquisition unit 11 repeats the process of step S211 until the battery is fully charged. When the battery is fully charged (Yes in step S212), the transmission unit 14 transmits a control signal to end charging (step S213). Thereafter, the charging control device 20 performs post-processing shown in FIG. 10 (step S214). When the charging control device 20 finishes the processing in FIG. 10, the charging control device 20 ends the series of processes.

[0101] The charge control device in this embodiment is configured as described above. In addition to the effects described in the first embodiment, the charge control device in this embodiment provides the following effects.

[0102] The charge control device in this embodiment further includes a charge start determination unit. The charge start determination unit determines whether or not a start condition for starting charging of the secondary battery is satisfied. If the start condition is not satisfied, the charge start determination unit does not start charging. The start condition includes at least one of the following: the value of the ambient temperature of the secondary battery is within a specified range, the value of the environmental temperature of the secondary battery is within a specified range, or the thickness change value is less than a specified value. As described above in the first embodiment, the deterioration of the secondary battery is accelerated by performing high-temperature charging or low-temperature charging. The charge control device of this embodiment prevents the deterioration of the secondary battery by not performing high-temperature charging or low-temperature charging. In other words, according to the charge control device of this embodiment, charging can be performed while aiming at a long life. Also, as described above in the first embodiment, if a high charging current is applied in a state in which the thickness of the secondary battery has changed, there is a risk that the secondary battery will break down or the charged device will be damaged. The charge control device of this embodiment can perform charging with improved safety by not performing charging when the thickness change value of the secondary battery is equal to or greater than a specified value.

[0103] The charge control device according to one aspect of the present embodiment further includes an alarm instruction unit. When the start condition is not satisfied, the alarm instruction unit transmits a control signal for performing an alarm process. For example, the alarm instruction unit transmits an instruction to blink a light, an instruction to sound a sound, or an instruction to output a warning message. This allows the user of the charged device to know that charging will not be performed.

[0104] [Third embodiment] Next, a charging control system and a charging control device according to this embodiment will be described with reference to the drawings. In the following description, the same parts as those in the first and second embodiments are given the same reference numerals, and the description will be omitted as appropriate. The charging control device of this embodiment differs from the charging control devices of the first and second embodiments in that it determines whether or not charging will be completed in time for a preset charging completion time, and if not, performs processing to increase the charging current determined by the determination unit.

[0105] (composition) 16 is a block diagram showing an example of the configuration of a charge control system in the present disclosure. The charge control system 3 in this embodiment includes a charge control device 30, a charged device 70-2, and a charging device 80-2. The charge control system 3 in this embodiment uses the charge control system 2 in the second embodiment, but is not limited to this. For example, the charge control system 3 may have a configuration that uses the charge control system 1 in the first embodiment. In other words, the alarm processing unit 77 and the alarm processing unit 84 may be omitted from the charged device 70-2.

[0106] 17 is a block diagram showing an example of the configuration of a charging control device in the present disclosure. A charging control device 30 in this embodiment includes an acquisition unit 11, a score calculation unit 12, a determination unit 13, a transmission unit 14, a charging method determination unit 15, an update unit 16, a charging start determination unit 21, an alarm instruction unit 22, a charging time calculation unit 31, a charging time determination unit 32, a charging current change unit 33, and a charging current determination unit 34. Note that the charging start determination unit 21 and the alarm instruction unit 22 may be omitted.

[0107] The charging time calculation unit 31 is an example of a charging time calculation means that calculates the charging time when charging is performed with the charging current determined by the determination unit 13. For example, the charging time calculation unit 31 calculates the charging time when charging is performed with the charging current determined by the determination unit 13, using the remaining charge acquired from the remaining charge monitoring unit 76 and past charging records. The above-mentioned method of calculating the charging time is an example, and various known techniques may be applied.

[0108] The charging time determination unit 32 is an example of a charging time determination means that determines whether or not the charging time calculated by the charging time calculation unit 31 is equal to or shorter than a preset charging completion time. For example, the charging completion time may be set in advance by a user of the charged device 70-2. For example, the charging completion time may be input from the charged device 70-2 at the start of charging. In this case, the charging control device 30 includes an input request unit that requests the charged device 70-2 to input the charging completion time at the start of charging.

[0109] When it is determined by the charging time determination unit 32 that the charging completion time set in advance will be exceeded, the charging current change unit 33 increases the charging current so as to meet the charging completion time. For example, the charging current change unit 33 increases the charging current so as to meet the charging completion time, using the remaining charge amount acquired from the remaining charge monitoring unit 76 and past charging records.

[0110] The charging current determination unit 34 determines whether the charging current changed by the charging current change unit 33 is equal to or less than a specified value of the charging current. If the charging current determination unit 34 determines that the charging current exceeds the specified value, the charging current change unit 33 changes the charging current to the specified value.

[0111] (operation) Next, an example of the operation of the charge control device 30 in this embodiment will be described with reference to the drawings. Note that the operation in the constant voltage charging section is similar to that in FIG. 8, and therefore its description will be omitted in this embodiment. The operation of the post-processing is similar to that in FIG. 10, and therefore its description will be omitted in this embodiment. Hereinafter, the operation of the charge control device 30 in the constant current charging section will be described with reference to FIGS. 18 to 20.

[0112] When the remaining charge of the secondary battery 75 is in the constant current charging section (Yes in step S2 in FIG. 8), the acquisition unit 11 acquires status information as deterioration factor information (step S301). The status information includes the maximum battery capacity of the secondary battery 75, the thickness change value of the secondary battery 75, the ambient temperature of the secondary battery 75, and the environmental temperature of the secondary battery 75. Note that, in this operation description, the above-mentioned information is acquired as the status information, but information other than the above-mentioned information may be included in the status information, or any information may not be included.

[0113] Next, the acquisition unit 11 acquires environmental information as deterioration factor information (step S302). The environmental information includes the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75. Note that, in this operation description, the above-mentioned information is acquired as the environmental information, but the environmental information may include information other than the above-mentioned information, or any information may not be included.

[0114] Next, the acquisition unit 11 acquires history information as deterioration factor information (step S303). The history information includes the number of times the secondary battery 75 has been dropped, the high-temperature charging time of the secondary battery 75, the low-temperature charging time of the secondary battery 75, and the time when the secondary battery 75 is out of charge. Note that, in this operation description, the above-mentioned information is acquired as the history information, but the history information may include information other than the above-mentioned information, or may not include any of the information. The acquisition unit 11 may execute at least one of the processes of steps S301 to S303. Also, the order of the processes of steps S301, S302, and S303 may be interchanged.

[0115] Next, the charging start determination unit 21 determines whether or not a start condition for starting charging of the secondary battery 75 is satisfied (step 3203). The charging start determination unit 21 determines that the start condition is satisfied when the values ​​of the ambient temperature of the secondary battery 75 and the environmental temperature of the secondary battery 75 acquired by the acquisition unit 11 are within a predetermined specified range. Alternatively, the charging start determination unit 21 determines that the start condition is satisfied when the thickness change value of the secondary battery 75 acquired by the acquisition unit 11 is less than a predetermined specified value. When the charging start determination unit 21 determines that the start condition is not satisfied (No in step S304), the alarm instruction unit 22 transmits a control signal for performing alarm processing to at least one of the alarm processing unit 77 or the alarm processing unit 84 (step S305). When the process of step S305 is completed, the charging control device 30 ends the process.

[0116] If the charging start determination unit 21 determines that the start condition is not satisfied (Yes in step S304), the score calculation unit 12 performs a score calculation process (step S306).

[0117] The operation of the score calculation process in step S306 will be described with reference to Fig. 19. First, the score calculation unit 12 calculates a score for determining the charging current of the secondary battery 75 by using the deterioration factor information (at least one of the state information, the environmental information, and the history information) acquired by the acquisition unit 11 (step S3061). The score calculation unit 12 converts each parameter acquired by the acquisition unit 11 into a score by referring to score tables such as those shown in Figs. 5 to 7. The score calculation unit 12 calculates the total score as a ratio to a specified value of the charging current.

[0118] If the score calculated in step S3061 exceeds 100 (No in step S3062), the score calculation unit 12 overwrites the score to 100 (step S3063). After completing the process of step S3063, the score calculation unit 12 ends the score calculation process. If the score calculated in step S3061 is 100 or less (Yes in step S3062), the score calculation unit 12 ends the score calculation process.

[0119] The description will return to the process in Fig. 18. After the score calculation process shown in Fig. 19 is completed, the determination unit 13 determines the charging current according to the score calculated by the score calculation unit 12 (step S307). The determination unit 13 determines the charging current by multiplying a specified value of the charging current by the score.

[0120] Next, the charging control device 30 performs a charging current change process (step S308).

[0121] The charging current change process in step S308 will be described with reference to Fig. 20. First, the charging time calculation unit 31 calculates the charging time when charging is performed with the charging current determined by the determination unit 13 (step S3081). For example, the charging time calculation unit 31 calculates the charging time when charging is performed with the charging current determined by the determination unit 13 using the remaining charge acquired from the remaining charge monitoring unit 76 and past charging records.

[0122] Next, the charging time determination unit 32 determines whether the charging time calculated by the charging time calculation unit 31 is equal to or shorter than the preset charging completion time (step S3082). If the charging time calculated by the charging time calculation unit 31 is equal to or shorter than the preset charging completion time (Yes in step S3082), the charging control device 30 ends the charging current change process.

[0123] If the charging time calculated by the charging time calculation unit 31 exceeds the preset charging completion time (No in step S3082), the charging current change unit 33 increases the charging current so as to meet the charging completion time (step S3083). For example, the charging current change unit 33 increases the charging current so as to meet the charging completion time by using the remaining charge amount acquired from the remaining charge monitoring unit 76 and past charging records.

[0124] Next, the charging current determination unit 34 determines whether the charging current changed by the charging current change unit 33 is equal to or less than the specified value of the charging current (step S3084). If the charging current changed by the charging current change unit 33 is equal to or less than the specified value of the charging current (Yes in step S3084), the charging control device 30 ends the charging current change process.

[0125] If the charging current changed by the charging current change unit 33 exceeds the specified value of the charging current (No in step S3084), the charging control device 30 changes the charging current to the specified value (step S3085). After completing the process of step S3085, the charging control device 30 ends the charging current change process.

[0126] Returning to the description of the process in Fig. 18, when the charging current change process shown in Fig. 20 is completed, the transmission unit 14 transmits a control signal for charging the secondary battery 75 with the charging current determined by the determination unit 13 (step S309).

[0127] The acquisition unit 11 acquires the remaining charge of the secondary battery 75 from the remaining charge monitor 78 (step S310). The acquisition unit 11 repeats the process of step S310 until the remaining charge reaches a charge amount predetermined by the user (No in step S311). That is, the acquisition unit 11 repeats the process of step S310 until the battery is fully charged. When the battery is fully charged (Yes in step S311), the transmission unit 14 transmits a control signal to end charging (step S312). Thereafter, the charging control device 30 performs post-processing shown in FIG. 10 (step S313). After completing step S313, the charging control device 30 ends the series of processes.

[0128] The charge control device in this embodiment is configured as described above. In addition to the effects described in the first and second embodiments, the charge control device in this embodiment provides the following effects.

[0129] The charging control device in this embodiment further includes a charging time calculation unit, a charging time determination unit, a charging current change unit, and a charging current determination unit. The charging time calculation unit calculates the charging time when charging with the charging current determined by the determination unit. The charging time determination unit determines whether the charging time calculated by the charging time calculation unit is equal to or shorter than a preset charging completion time. The charging current change unit increases the charging current so as to meet the charging completion time when the charging time determination unit determines that the charging time will exceed the preset charging completion time. The charging current determination unit determines whether the changed charging current is equal to or shorter than a specified value of the charging current. When the charging current exceeds the specified value, the charging current change unit changes the charging current to the specified value. With the above configuration, the charging control device in this embodiment can increase the charging current in accordance with the charging time desired by the user. In addition, since the charging control device in this embodiment is configured to control the charging current so as not to exceed the specified value, the secondary battery can be charged without accelerating deterioration more than necessary.

[0130] [Fourth embodiment]

[0131] (composition) Next, the configuration of the charge control device according to this embodiment will be described with reference to the drawings. The charge control device 40 has a simplified configuration of the charge control device according to each embodiment. In the following description, the description of the same parts as those in the first, second, or third embodiment will be omitted as appropriate.

[0132] 21 is a block diagram showing an example of the configuration of a charge control device according to the present disclosure. The charge control device 40 includes an acquisition unit 41, a score calculation unit 42, a determination unit 43, and a transmission unit 44.

[0133] The acquisition unit 41 acquires history information from the charged device, which is a history that may be a cause of deterioration of the secondary battery. The score calculation unit 42 uses the acquired history information to calculate a score for a specified value of the charging current of the secondary battery. The determination unit 43 determines the charging current of the secondary battery by multiplying the specified value of the charging current by the calculated score. The transmission unit 44 transmits a control signal to the charging device for charging the secondary battery with the determined charging current.

[0134] (operation) Next, an example of the operation of the charge control device according to the present disclosure will be described with reference to FIG.

[0135] First, the acquisition unit 41 acquires history information, which is a history that may be a cause of deterioration of the secondary battery, from the charged device (step S41).

[0136] Next, the score calculation unit 42 uses the acquired history information to calculate a score for the specified value of the charging current of the secondary battery (step S42).

[0137] Next, the determination unit 43 determines the charging current of the secondary battery by multiplying the specified value of the charging current by the calculated score (step S43).

[0138] Next, the transmitter 44 transmits a control signal to the charging device for charging the secondary battery with the determined charging current (step S46).

[0139] In this embodiment, the charging current of the secondary battery is controlled according to a score calculated using deterioration factor information including deterioration factors of the secondary battery. Therefore, according to this embodiment, charging control according to the state of the secondary battery is possible.

[0140] (Modification) In each embodiment, the charge control device, the charged device, and the charging device have been described as being separate configurations, but the present invention is not limited to this. As shown in Fig. 23, the charge control device may be part of the configuration of the charged device. Also, as shown in Fig. 24, the charge control device may be part of the configuration of the charging device. With such a configuration, it is not necessary to connect the charged device and the charging device to the charge control device so that they can communicate with each other.

[0141] As shown in FIG. 23, when the charge control device is a part of the configuration of the charged device, the charge control system does not need to include the charge device. In this case, the control unit 72 of the charged device 70 performs the same process as the control unit 82 of the charging device 80. That is, the control unit 72 performs the following process. The control unit 72 receives a value of the charging current from the charge control device. The control unit 72 controls the amount of power supplied to the secondary battery 75 using the value of the charging current received from the charge control device. The control unit controls the amount of power supplied from the input connector 71 so that the charging current of the received value is supplied to the secondary battery 75. In addition, the control unit 72 transmits information of the charged device 70 to the charge control device in response to an instruction from the charge control device. The control unit 72 transmits information acquired by the sensor 73 to the charge control device. The control unit 72 transmits the maximum battery capacity and history information stored in the memory 74 to the charge control device. The control unit 72 transmits the remaining charge monitored by the remaining charge monitoring unit 76 to the charge control device. In addition, the control unit 72 updates the information stored in the charged device 70 in response to an instruction from the charge control device. The control unit 72 updates the maximum battery capacity and the history information stored in the memory 74 .

[0142] [Hardware configuration] The functions of each of the components in each of the embodiments of the present disclosure described above can be realized not only by hardware but also by a computer device and firmware based on program control.

[0143] Fig. 25 is a diagram showing an example of a hardware configuration in which the charge control device in the present disclosure is realized by a computer device 90 including a processor. The charge control device in each embodiment is realized by the computer device 90. The computer device 90 executes the charge control method in the present disclosure shown in the above-mentioned flowchart. As shown in Fig. 25, the computer device 90 includes a CPU (Central Processing Unit) 91, a memory 92, a storage device 93 such as a hard disk for storing programs, an input / output interface 94 for connecting input devices and output devices, and a communication interface 95 for connecting to a network.

[0144] The CPU 91 runs an operating system to control the charge control device of the present disclosure. For example, the CPU 91 reads out programs and data from a storage medium attached to a drive device or the like into the memory 92. The CPU 91 also functions as a part of the acquisition unit 41, score calculation unit 42, determination unit 43, and transmission unit 44 in the charge control device 40 of the present disclosure, for example, and executes processes or commands based on the programs.

[0145] The storage device 93 is, for example, an optical disk, a flexible disk, a magneto-optical disk, an external hard disk, or a semiconductor memory. A part of the storage device is a storage medium that is a non-volatile storage device, and the program is recorded therein. The program may also be downloaded from an external computer (not shown) connected to a communication network.

[0146] The input device connected to the input / output interface 94 is realized by, for example, a mouse, a keyboard, etc., and is used for input operations. Similarly, the output device connected to the input / output interface 94 is realized by, for example, a display, etc., and is used for displaying and checking output results.

[0147] Although the present disclosure has been described above with reference to each embodiment, the present disclosure is not limited to the above embodiment. The configuration and details of the present disclosure can be modified in various ways that can be understood by a person skilled in the art within the scope of the present disclosure. For example, although multiple operations are described in order in the form of a flowchart, the order of description does not limit the order in which the multiple operations are performed. Therefore, when implementing each embodiment, the order of the multiple operations can be changed to the extent that the content is not affected.

[0148] Some or all of the above embodiments can be described as follows: (Appendix 1) an acquisition means for acquiring history information from the charged device, the history information being a history that may be a cause of deterioration of the secondary battery; a score calculation means for calculating a score for a prescribed value of a charging current of the secondary battery using the acquired history information; a determination means for determining the charging current by multiplying the specified value of the charging current by the score; a transmitting means for transmitting a control signal to a charging device for charging the secondary battery with the charging current; A charging control device comprising: (Appendix 2) The charging control device described in Appendix 1, wherein the history information includes at least one of a drop history of the secondary battery, a high temperature charging time of the secondary battery, a low temperature charging time of the secondary battery, a time when the secondary battery is out of charge, or a number of times the secondary battery has been charged. (Appendix 3) The acquiring means further acquires status information indicating a degradation state of the secondary battery, the state information includes at least one of a maximum battery capacity, which is a value indicating a deterioration in battery capacity of the secondary battery, and a thickness change value of the secondary battery; The charge control device according to claim 1, wherein the score calculation means calculates the score by further using the state information. (Appendix 4) The acquiring means further acquires environmental information which is an environmental factor among deterioration factors of the secondary battery; the environmental information includes at least one of an ambient temperature of the secondary battery or an environmental temperature of the secondary battery, 3. A charging control device according to claim 1 or 2. (Appendix 5) a charging start determination means for determining whether a start condition for starting charging of the secondary battery is satisfied; The charging control device described in Appendix 1, wherein the start condition includes at least one of the following: the ambient temperature value of the secondary battery is within a specified range, the environmental temperature value of the secondary battery is within a specified range, or the thickness change value of the secondary battery is less than a specified value. (Appendix 6) 6. The charging control device according to claim 5, further comprising an alarm instruction means for transmitting a control signal for performing an alarm process when the start condition is not satisfied. (Appendix 7) a charging time calculation means for calculating a charging time when charging is performed with the charging current determined by the determination means; a charging time determination means for determining whether the charging time is equal to or shorter than a preset charging completion time; a charging current changing means for increasing the charging current so as to meet a predetermined charging completion time when the charging time determining means determines that the charging time will exceed the predetermined charging completion time; a charging current determination means for determining whether the charging current changed by the charging current change means is equal to or less than a specified charging current value, 2. The charging control device according to claim 1, wherein the charging current changing means changes the charging current to a specified value when the charging current determining means determines that the charging current exceeds a specified value. (Appendix 8) The charging control device according to any one of Supplementary Notes 1 to 7, wherein the score calculation unit sets a value of the score to 100 when the calculated score exceeds 100. (Appendix 9) A secondary battery; A sensor for acquiring information regarding the state of the charged device; A memory for storing the history information; a control unit that stores the history information in the memory based on a detection result of the sensor, and transmits the history information stored in the memory to the charging control device according to any one of Supplementary Notes 1 to 8; A charged device comprising: (Appendix 10) The charged device described in Appendix 9, wherein the sensor includes at least one of a pressure sensor for detecting a change in thickness due to expansion of the secondary battery, an acceleration sensor for detecting a drop of the charged device, an ambient temperature sensor for detecting the ambient temperature of the secondary battery, and an ambient temperature sensor for detecting the ambient temperature of the charged device. (Appendix 11) The computer acquiring history information from the charged device, the history being a cause of deterioration of the secondary battery; Using the acquired history information, a score is calculated for a specified value of a charging current of the secondary battery; determining the charging current by multiplying a prescribed value of the charging current by the calculated score; Transmitting a control signal for charging the secondary battery with the charging current Charging control method. (Appendix 12) The charging control device described in Appendix 11, wherein the history information includes at least any one of a drop history of the secondary battery, a high temperature charging time of the secondary battery, a low temperature charging time of the secondary battery, a time when the secondary battery is out of charge, or a number of times the secondary battery has been charged. (Appendix 13) The computer further acquires status information indicating a deterioration state of the secondary battery; the state information includes at least one of a maximum battery capacity, which is a value indicating a deterioration in battery capacity of the secondary battery, and a thickness change value of the secondary battery; 13. The charge control method according to claim 11, wherein the score is calculated by further using the state information. (Appendix 14) In the acquiring, environmental information is further acquired, the environmental information being an environmental factor among the deterioration factors of the secondary battery; the environmental information includes at least one of an ambient temperature of the secondary battery or an environmental temperature of the secondary battery, 14. The charge control method according to claim 11, further comprising: calculating the score by further using the environmental information. (Appendix 15) determining whether a start condition for starting charging of the secondary battery is satisfied; The charging control method described in Appendix 11, wherein the start condition includes at least one of the following: the ambient temperature value of the secondary battery is within a specified range, the environmental temperature value of the secondary battery is within a specified range, or the thickness change value of the secondary battery is less than a specified value. (Appendix 16) 16. The charging control method according to claim 15, further comprising transmitting a control signal for performing alarm processing when the start condition is not satisfied. (Appendix 17) Calculating a charging time when charging at the determined charging current; determining whether the charging time is equal to or shorter than a preset charging completion time; When it is determined that a predetermined charging completion time will be exceeded, the charging current is increased so as to meet the charging completion time; determining whether the changed charging current is equal to or less than a specified charging current; 16. The charging control method according to claim 15, wherein, when it is determined that the charging current exceeds a prescribed value, the charging current is changed to a prescribed value. (Appendix 18) 18. The charge control method according to any one of claims 11 to 17, wherein if the calculated score exceeds 100, the score value is set to 100. (Appendix 19) On the computer, A process of acquiring history information from the charged device, the history being a history that may be a cause of deterioration of the secondary battery; calculating a score for a specified value of a charging current of the secondary battery using the acquired history information; A process of determining the charging current by multiplying a prescribed value of the charging current by the calculated score; a process of transmitting a control signal to a charging device for charging the secondary battery with the charging current; A program to execute. (Appendix 20) The program described in Appendix 19, wherein the history information includes at least any one of a drop history of the secondary battery, a high temperature charging time of the secondary battery, a low temperature charging time of the secondary battery, a time when the secondary battery is out of charge, or a number of times the secondary battery has been charged. (Appendix 21) In the acquisition process, status information indicating a deterioration state of the secondary battery is further acquired; the state information includes at least one of a maximum battery capacity, which is a value indicating a deterioration of a battery capacity of the secondary battery, and a thickness change value of the secondary battery; 21. The program according to claim 19 or 20, further comprising calculating the score using the state information in the process of calculating the score. (Appendix 22) In the acquisition process, environmental information is further acquired, the environmental information being an environmental factor among the deterioration factors of the secondary battery; the environmental information includes at least one of an ambient temperature of the secondary battery and an environmental temperature of the secondary battery; 22. The program according to any one of appendices 19 to 21, wherein in the process of calculating the score, the score is calculated by further using the environmental information. (Appendix 23) causing the computer to further execute a process of determining whether a start condition for starting charging of the secondary battery is satisfied; The program described in Appendix 19, wherein the start condition includes at least one of the following: an ambient temperature value of the secondary battery is within a specified range, an environmental temperature value of the secondary battery is within a specified range, or a thickness change value of the secondary battery is less than a specified value. (Appendix 24) 24. The program according to claim 23, which causes a computer to execute a process of transmitting a control signal for performing alarm processing when the start condition is not satisfied. (Appendix 25) The computer, in addition, A process of calculating a charging time when charging is performed with the charging current determined by the determination means; A process of determining whether the charging time is equal to or shorter than a preset charging completion time; a process of increasing the charging current so as to meet a predetermined charging completion time when the charging time determination means determines that the charging time will exceed a predetermined charging completion time; A process of determining whether the changed charging current is equal to or less than a specified charging current value; and, when it is determined that the charging current exceeds a prescribed value, changing the charging current to a prescribed value. (Appendix 26) 26. The program of any one of appendixes 19 to 25, wherein if the calculated score exceeds 100, the score value is set to 100. [Explanation of symbols]

[0149] 10, 20, 30, 40 Charging control device 11, 41 Acquisition unit (acquisition means) 12, 42 score calculation unit (score calculation means) 13, 43 Determination unit (determination means) 14, 44 Transmission unit (transmission means) 15 Charging method determination section 16 Update section 21 Charging start determination section (charging start determination means) 22 Alarm indicator 31 Charging time calculation section 32 Charging time determination section 33 Charging current change unit (charging current change means) 34 Charging current determination section (charging current determination means) 70, 70-2, 70-3 Charged device 71 Input Connector 72 Control section 73 Sensors 73-1 Pressure sensor 73-2 Acceleration sensor 73-3 Ambient temperature sensor 73-4 Environmental temperature sensor 74 Memory 75 Secondary battery 76 Remaining charge monitor 77 Alarm Processing Section 80, 80-2, 80-3 charging device 81 Input Connector 82 Control section 83 Output Connector 84 Alarm Processing Section 90 Computer Equipment 91 CPU(Central Processing Unit) 92 Memory 93 Storage device 94 Input / Output Interface 95 Communication Interface 100 External power supply

Claims

1. an acquisition means for acquiring history information from the charged device, the history information being a history that may be a cause of deterioration of the secondary battery; a score calculation means for calculating a score for a prescribed value of a charging current of the secondary battery using the acquired history information; a determination means for determining the charging current by multiplying a prescribed value of the charging current by the calculated score; a transmitting means for transmitting a control signal to a charging device for charging the secondary battery with the charging current; A charging control device comprising:

2. 2. The charging control device according to claim 1, wherein the history information includes at least one of a drop history of the secondary battery, a high-temperature charging time of the secondary battery, a low-temperature charging time of the secondary battery, a time when the secondary battery is out of charge, or a number of times the secondary battery is charged.

3. The acquiring means further acquires status information indicating a degradation state of the secondary battery, the state information includes at least one of a maximum battery capacity, which is a value indicating a deterioration in battery capacity of the secondary battery, and a thickness change value of the secondary battery; The charge control device according to claim 1 , wherein the score calculation means calculates the score by further using the state information.

4. The acquiring means further acquires environmental information which is an environmental factor among deterioration factors of the secondary battery; the environmental information includes at least one of an ambient temperature of the secondary battery or an environmental temperature of the secondary battery, The charge control device according to claim 1 , wherein the score calculation means calculates the score by further using the environmental information.

5. a charging start determination means for determining whether a start condition for starting charging of the secondary battery is satisfied; 2. The charging control device according to claim 1, wherein the start condition includes at least one of the following: the ambient temperature value of the secondary battery is within a specified range, the environmental temperature value of the secondary battery is within a specified range, or the thickness change value of the secondary battery is less than a specified value.

6. The charge control device according to claim 5 , further comprising an alarm instruction unit that transmits a control signal for carrying out an alarm process when the start condition is not satisfied.

7. a charging time calculation means for calculating a charging time when charging is performed with the charging current determined by the determination means; a charging time determination means for determining whether the charging time is equal to or shorter than a preset charging completion time; a charging current changing means for increasing the charging current so as to meet a predetermined charging completion time when the charging time determining means determines that the charging time will exceed the predetermined charging completion time; a charging current determination means for determining whether the charging current changed by the charging current change means is equal to or less than a specified charging current value, 2. The charge control device according to claim 1, wherein the charging current changing means changes the charging current to the specified value when the charging current determining means determines that the charging current exceeds a specified value.

8. A secondary battery; A sensor for acquiring information regarding the state of the charged device; A memory for storing the history information; a control unit that stores the history information in the memory based on a detection result of the sensor, and transmits the history information stored in the memory to the charging control device according to any one of claims 1 to 7; A charged device comprising:

9. The computer acquiring history information from the charged device, the history being a cause of deterioration of the secondary battery; Using the acquired history information, a score is calculated for a specified value of a charging current of the secondary battery; determining the charging current by multiplying a prescribed value of the charging current by the calculated score; A control signal for charging the secondary battery with the charging current is transmitted to a charging device. Charging control method.

10. On the computer, A process of acquiring history information from the charged device, the history being a history that may be a cause of deterioration of the secondary battery; calculating a score for a specified value of a charging current of the secondary battery using the acquired history information; A process of determining the charging current by multiplying a prescribed value of the charging current by the calculated score; a process of transmitting a control signal to a charging device for charging the secondary battery with the charging current; A program to execute.

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