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

Abstract

This invention provides a charging control system, charging device, charging system, charging control method, and program that take disaster prevention into consideration. [Solution] The charging control system 3 comprises a control unit 51 and a vibration detection unit 6. The control unit 51 controls the charging operation of a charging device 11 that charges the battery 101 of the electric vehicle 100. The charging device 11 is connected to the electric vehicle 100 via a charging cable 41. The vibration detection unit 6 detects vibrations of the charging device 11. The control unit 51 can switch between a first mode and a second mode. In the first mode, it charges the battery 101. In the second mode, it stops charging the battery 101. If the vibration detection unit 6 detects vibration while the control unit 51 is operating in the first mode, it switches to the second mode. If the vibration stops while the control unit 51 is operating in the second mode, it switches back to the first mode.

Description

Technical Field

[0001] The present disclosure relates to a charging control system, a charging device, a charging system, a charging control method, and a program. More specifically, it relates to a charging control system, a charging device, a charging system, a charging control method, and a program for controlling the charging of a storage battery of an electric vehicle.

Background Art

[0002] Patent Document 1 discloses a charging system in which a plurality of electric vehicles can be charged simultaneously.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a charging control system, a charging device, a charging system, a charging control method, and a program that take into account disaster prevention.

Means for Solving the Problems

[0005] A charging control system according to an aspect of the present disclosure includes a control unit and a vibration detection unit. The control unit is connected to an electric vehicle via a charging cable and controls the charging operation of a charging device that charges the storage battery of the electric vehicle. The vibration detection unit detects the vibration of the charging device. The control unit can switch between a first mode and a second mode. In the first mode, the control unit charges the storage battery. In the second mode, the control unit stops charging the storage battery. When the vibration detection unit detects vibration during operation in the first mode, the control unit switches to the second mode. When the vibration stops during operation in the second mode, the control unit switches to the first mode.

[0006] A charging device according to one aspect of the present disclosure comprises the charging control system and an outlet that can be connected to the electric vehicle via a charging cable.

[0007] A charging system according to one aspect of the present disclosure includes a host system, a plurality of charging devices, and a plurality of vibration detection units. The plurality of charging devices are configured to communicate with the host system. The plurality of vibration detection units detect vibrations in each of the plurality of charging devices. Each of the plurality of charging devices has a control unit that controls the charging operation of a battery of an electric vehicle connected via a charging cable. The control unit is switchable between a first mode and a second mode. In the first mode, it charges the battery according to a command from the host system. In the second mode, it stops charging the battery. If the vibration detection unit detects vibration while operating in the first mode, it switches to the second mode.

[0008] A charging control method according to one aspect of the present disclosure is switchable between a first mode and a second mode. In the first mode, the battery of the electric vehicle is charged. In the second mode, the charging of the battery is stopped. The charging control method includes a first step, a second step, a third step, and a fourth step. In the first step, the battery is charged in the first mode. In the second step, vibration detection results are obtained from a vibration detection unit. In the third step, if the vibration detection unit detects vibration while operating in the first mode, the system switches to the second mode. In the fourth step, if the vibration stops while operating in the second mode, the system switches back to the first mode.

[0009] A program according to one aspect of this disclosure is a program for causing one or more processors of a computer system to execute the charging control method. [Effects of the Invention]

[0010] According to this disclosure, it is possible to provide a charging control system, charging device, charging system, charging control method, and program that take disaster prevention into consideration. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a block diagram of a charging control system, a charging device, and a charging system according to one embodiment of the present disclosure. [Figure 2] Figure 2 is a schematic diagram showing an example of the use of the charging control system, charging device, and charging system described above. [Figure 3] Figure 3 is a block diagram showing the configuration of the vibration detection unit described above. [Figure 4] Figure 4 is a graph showing an example of vibration results (first vibration state) detected by the vibration detection unit described above. [Figure 5] Figure 5 is a graph showing an example of vibration results (second vibration state) detected by the vibration detection unit described above. [Figure 6] Figure 6 is a flowchart showing an example of the operation of the charging control system described above. [Modes for carrying out the invention]

[0012] Hereinafter, the charging control system 3, charging device 11, charging system 1, charging control method, and program according to the embodiments will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the dimensional ratios of the size of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0013] (Embodiment) (1) Overview As shown in Figure 1, the charging control system 3 according to this embodiment is a system that controls the charging of the battery 101 of the electric vehicle 100. The charging control system 3 is mounted on the charging device 11. The charging device 11 is connected to the electric vehicle 100 via a charging cable 41 and charges the battery 101 of the electric vehicle 100. Here, the battery 101, which is controlled by the charging control system 3 and the charging device 11, is used as a power source for the electric vehicle 100 (in this case, an electric vehicle). That is, the electric vehicle 100 converts the electrical energy (power) output from the battery 101 as a power source into mechanical energy (driving force) using an electric motor, etc., and moves using this mechanical energy. In this type of electric vehicle 100, the electrical energy stored in the battery 101 is consumed as the electric vehicle 100 moves, so in order to use the electric vehicle 100 continuously, the battery 101 needs to be charged as needed.

[0014] The charging device 11 (charging control system 3), as shown in Figure 1, is installed in a facility 200 and controls the charging of electric vehicles 100 in these facilities 200. The facility 200 may include a parking lot 210 for electric vehicles 100 and a building attached to the parking lot 210. Examples of facilities 200 include residential buildings (e.g., detached houses, apartment buildings) or non-residential buildings (e.g., factories, commercial facilities, amusement facilities, hospitals, offices, buildings). An example of a parking lot 210 is a mechanical multi-story parking garage.

[0015] This embodiment describes a case in which a charging device 11 and a charging control system 3 are introduced to a facility 200 having a parking lot 210. As shown in Figure 2, the parking lot 210 is a mechanical multi-story parking garage capable of parking two electric vehicles 100. In the parking lot 210, pallets (carriers) 201 carrying the electric vehicles 100 move up and down (in the direction of the arrows in the figure) to enter and exit the parking lot. The parking lot 210 can park one electric vehicle 100 on top of one electric vehicle 100 that is already parked.

[0016] In addition, as an example in this embodiment, a case where the charging device 11 and the charging control system 3 are used for charging the storage battery 101 of the electric vehicle 100 will be described. That is, the charging control system 3 and the charging device 11 according to this embodiment are used for charging the storage battery 101 of the electric vehicle 100 parked in the parking lot 210 as shown in FIG. 2. The electric vehicle 100 has at least a storage battery 101 and is an electric vehicle that runs using the electric energy stored in the storage battery 101. The "electric vehicle" referred to in the present disclosure is, for example, an electric vehicle that runs by the output of an electric motor, or a plug-in hybrid vehicle that runs by combining the output of an engine and the output of an electric motor. Further, the electric vehicle may be a senior car, a two-wheeler (electric motorcycle), a three-wheeler, or an electric bicycle.

[0017] Also, as shown in FIG. 1, the charging device 11 of this embodiment includes a charging control system 3 and a socket 4, and the socket 4 is connected to the electric vehicle 100 via a charging cable 41. That is, the charging device 11 is a socket-type charging device. In this embodiment, a plurality of charging devices 11 are installed in the facility 200 having the parking lot 210. More specifically, as shown in FIG. 2, the charging device 11 is attached to a pole 202 installed on the pallet 201 of the parking lot 210.

[0018] As shown in FIG. 1, the charging control system 3 according to this embodiment includes a control unit 51 and a vibration detection unit 6. The control unit 51 controls the charging operation of the charging device 11 that charges the storage battery 101 used as the power source of the electric vehicle 100. The vibration detection unit 6 detects the vibration of the charging device 11. The vibration of the charging device 11 is the vibration at the installation location of the charging device 11, and when the charging device 11 is fixed to the ground or a building, it is the vibration generated by an earthquake or the like. When the charging device 11 is fixed to the pallet 201 of a mechanical multi-story parking lot, it is the vibration applied to the charging device 11 due to an earthquake or the movement of the pallet. The configuration of the vibration detection unit 6 will be described later.

[0019] The control unit 51 can switch between a first mode and a second mode. The first mode is a control mode for charging the storage battery 101. The second mode is a control mode for stopping the charging of the storage battery 101. When the vibration detection unit 6 detects vibration during operation in the first mode, the control unit 51 switches to the second mode. When the vibration stops in the second mode, the control unit 51 switches to the first mode.

[0020] According to the charging control system 3 and the charging device 11 according to the present embodiment, it is possible to temporarily stop the charging operation when, for example, an earthquake occurs during the charging of the electric vehicle 100. Thereby, even when the charging cable 41 drops from the electric vehicle 100 due to the vibration of the earthquake, since no current is passed through the charging cable 41, the safety can be improved. Thereby, it is possible to prevent secondary disasters caused by earthquakes that may occur during the charging of the electric vehicle 100. Therefore, according to the present embodiment, it is possible to provide a charging technology for the electric vehicle 100 that takes into account disaster prevention.

[0021] Also, as shown in FIG. 1, the charging system 1 according to the present embodiment includes a host system 2 and a plurality of charging devices 11. The charging system 1 can charge a plurality of electric vehicles 100. Each of the plurality of charging devices 11 is configured to be communicable with the host system 2. Each of the plurality of charging devices 11 is connected to the electric vehicle 100 via a charging cable 41 and charges the storage battery 101 of the electric vehicle 100. The configuration of the host system 2 will be described later. Each of the plurality of charging devices 11 includes the above-described charging control system 3 and a power outlet 4. In each of the plurality of charging devices 11, it is possible to switch between a first mode for charging the storage battery 101 according to a command from the host system 2 and a second mode for stopping the charging of the storage battery 101. When the vibration detection unit 6 detects vibration during operation in the first mode, each charging device 11 switches to the second mode. When the vibration stops during operation in the second mode after being switched from the first mode to the second mode by detecting the vibration, each charging device 11 switches to the first mode.

[0022] According to the charging system 1 of this embodiment, it is possible to temporarily stop the charging operation if, for example, an earthquake occurs while multiple electric vehicles 100 are being charged. This makes it possible to prevent secondary damage caused by an earthquake that may occur while multiple electric vehicles 100 are being charged.

[0023] Functions similar to those of the charging control system 3 according to this embodiment can be realized in the charging control method. The charging control method of this embodiment includes a first step, a second step, a third step, and a fourth step. In the first step, the charging operation of the storage battery 101 is performed in the first mode (see step S1 in Figure 6). In the second step, the vibration detection result is obtained from the vibration detection unit 6 (see step S2 in Figure 6). In the third step, if the vibration detection unit 6 detects vibration while operating in the first mode, it switches to the second mode (see step S3 in Figure 6). In the fourth step, if the vibration stops while operating in the second mode, it switches back to the first mode (see step S7 in Figure 6).

[0024] Furthermore, the charging control method can be implemented in a program. The program in this embodiment is a program that causes one or more processors of a computer system to execute the charging control method. The program may be recorded on a non-temporary recording medium that can be read by the computer system.

[0025] (2)Details The configurations of the charging control system 3, charging device 11, and charging system 1 according to this embodiment will be described in detail below with reference to the drawings.

[0026] (2.1) Charging system The charging system 1 according to this embodiment is configured to supply power from an external power source 30 to the batteries 101 of multiple electric vehicles 100. The external power source 30 is, for example, a grid power source or a distributed power source. The charging system 1 also includes a higher-level system 2 and a plurality of charging devices 11 configured to communicate with the higher-level system 2, as shown in Figure 1. The higher-level system 2 includes a server 21 and a controller 22. The server 21 can control the plurality of charging devices 11. Specifically, the server 21 is connected to the controller 22 via a network N and communicates with the plurality of charging devices 11 via the controller 22. The server 21 also acquires information indicating the operating status of the plurality of charging devices 11 and controls each charging device 11 according to the charging schedule. The charging schedule is a schedule that defines the operating status of the charging control system 3 (particularly the control unit 51) for each time period, and is a command transmitted from the higher-level system 2 to the charging control system 3. This makes it possible to charge the batteries 101 of the plurality of electric vehicles 100 according to the charging schedule.

[0027] (2.2) Charging device As shown in Figure 1, the charging device 11 according to this embodiment is connected to the electric vehicle 100 via a charging cable 41. The charging device 11 includes a charging control system 3 that controls the charging operation of the battery 101 of the electric vehicle 100, and an outlet 4. The charging device 11 is an outlet-type charging device. In this embodiment, a plurality of charging devices 11 are installed in a facility 200 having a parking lot 210. More specifically, as shown in Figure 2, the parking lot 210 is a mechanical multi-story parking garage. The charging device 11 is attached to a pole 202 installed on a pallet 201 in the parking lot 210. As a result, vibrations caused by earthquakes or vibrations caused by the movement of the pallet 201 are transmitted from the pallet 201 to the charging device 11 via the pole 202.

[0028] Charging of the battery 101 of the electric vehicle 100 is performed with the charging device 11 connected to the electric vehicle 100 via a charging cable 41, as shown in Figure 1. More specifically, as shown in Figure 2, the charging device 11 charges the battery 101 with the plug of the charging cable 41 inserted into the outlet 4 of the charging device 11 (see Figure 1) and the connector 40 of the charging cable 41 connected to the electric vehicle 100 (power receiving unit). This allows the charging device 11 to supply power from the external power source 30 to the battery 101 of the electric vehicle 100.

[0029] (2.3) Charging control system As shown in Figure 1, the charging control system 3 according to this embodiment includes a processing unit 5, a vibration detection unit 6, a communication unit 7, a storage unit 8, a display unit 9, and a power converter 10.

[0030] <Processing> The processing unit 5 includes a computer system having one or more processors and memory. The functions of the processing unit 5 are realized when the processor of the computer system executes a program stored in the computer's memory. The program may be stored in memory, provided via a telecommunication line such as the Internet, or provided on a non-temporary recording medium such as a memory card.

[0031] As shown in Figure 1, the processing unit 5 includes a control unit 51. The control unit 51 represents the functions implemented by the processing unit 5.

[0032] The control unit 51 controls the charging operation of the charging device 11. In this embodiment, the control unit 51 can switch between a first mode and a second mode. The "first mode" as used in this disclosure is a control mode for charging the battery 101. More specifically, the control mode for charging may include an automatic control mode and a manual control mode. The automatic control mode is a charging mode in which the control unit 51 automatically controls the charging of the battery 101 according to a charging schedule. The manual control mode is a charging mode in which the control unit 51 controls the charging of the battery 101 according to an operation signal from, for example, an input interface (not shown) of the charging device 11. The control unit 51 may charge the battery 101 using either the automatic control mode or the manual control mode. In the following description, the case in which the control unit 51 charges the battery 101 using the automatic control mode will be explained.

[0033] In this disclosure, the "second mode" is a control mode that stops charging the battery 101. In the second mode, the control unit 51 can control the operation of the power converter 10, which converts power supplied from the external power source 30 into charging power supplied to the battery 101. More specifically, in the second mode, the control unit 51 sets the magnitude of the current that the power converter 10 outputs to the battery to a reference current value Is without stopping the operation of the power converter 10. The reference current value Is is set to a value lower than the charging current Ich. The charging current Ich is the rated value. The control unit 51 then determines whether the charging cable 41 is connected to the charging device 11 and the electric vehicle 100 based on the presence or absence of detection of current in the circuit between the electric vehicle 100 and the power converter 10. An ammeter (not shown) is installed in the circuit between the electric vehicle 100 and the power converter 10. The ammeter only needs to be connected in series with the circuit. The control unit 51 then determines that if no current is detected in the circuit between the electric vehicle 100 and the power converter 10, the charging cable 41 is not connected to at least one of the charging device 11 and the electric vehicle 100. On the other hand, if a current equal to or greater than the reference current value Is is detected in the circuit between the electric vehicle 100 and the power converter 10, the control unit 51 determines that the charging cable 41 is connected to both the charging device 11 and the electric vehicle 100, and switches to the first mode.

[0034] <Signal detection unit> The vibration detection unit 6 detects vibrations in the charging device 11. The vibration detection unit 6 is, for example, an earthquake sensor. More specifically, the vibration detection unit 6 detects whether the vibration of the charging device 11 is in a first vibration state or a second vibration state. In this disclosure, the "first vibration state" refers to a vibration state in which the vibration of the charging device 11 allows charging. An example of a vibration state that allows charging is when an electric vehicle 100 is parked in a mechanical multi-story parking garage as shown in Figure 2, and vibrations are generated in the charging device 11 due to the movement of the pallet 201 on which the electric vehicle 100 is placed. In this case, the vibration stops when the movement of the pallet 201 is completed.

[0035] Furthermore, the term "second vibration state" as used in this disclosure refers to a vibration state in which the charging device 11 is unable to allow charging. An example of a vibration state in which charging is unacceptable is when an earthquake occurs while an electric vehicle 100 is parked in a mechanical multi-story parking garage as shown in Figure 2, and the pallet 201 on which the electric vehicle 100 is placed vibrates due to the shaking of the earthquake, resulting in vibrations in the charging device 11. In this case, even if the shaking of the earthquake has temporarily subsided, there remains a possibility of aftershocks occurring.

[0036] Figure 3 is a block diagram showing the configuration of the vibration detection unit 6. As shown in Figure 3, the vibration detection unit 6 comprises an acceleration sensor 61 and a processing unit 62. The acceleration sensor 61 is a three-axis acceleration sensor that detects acceleration in three axes. The processing unit 62 includes a computer system having one or more processors and memory. The functions of the processing unit 62 are realized by the execution of a program recorded in the computer's memory by the processor of the computer system. The program may be recorded in memory, provided via a telecommunication line such as the Internet, or provided on a non-temporary recording medium such as a memory card. As shown in Figure 3, the processing unit 62 comprises a calculation unit 63 and a detection unit 64. The calculation unit 63 and the detection unit 64 represent the functions realized by the processing unit 62.

[0037] In this embodiment, the calculation unit 63 calculates the magnitude of vibration and the distance traveled of the charging device 11 based on the value detected by the acceleration sensor 61. The magnitude of vibration is calculated from the value (acceleration) detected by the acceleration sensor 61. The magnitude of vibration is the magnitude (absolute value) of the acceleration applied to the charging device 11. The distance traveled is calculated by performing a second integral of the value (acceleration) detected by the acceleration sensor 61. The distance traveled is the distance the charging device 11 has moved. In this embodiment, the detection unit 64 determines whether the state is a first vibration state or a second vibration state based on the magnitude of vibration (acceleration) and the distance traveled.

[0038] Figure 4 is a schematic graph showing the vibration results of the first vibration state calculated by the vibration detection unit 6. The graph in Figure 4 shows the time change in the magnitude (acceleration) and distance traveled by the charging device 11 due to the upward or downward movement of the pallet 201 when the electric vehicle 100 is parked in a mechanical multi-story parking garage as shown in Figure 2.

[0039] Figure 5 is a schematic graph showing the vibration results of the second vibration state calculated by the vibration detection unit 6. The graph in Figure 5 shows the time change in the magnitude (acceleration) and distance traveled by the charging device 11 when the pallet 201 on which the electric vehicle 100 is placed vibrates due to earthquake shaking, while the electric vehicle 100 is parked in a mechanical multi-story parking garage as shown in Figure 2.

[0040] The magnitude of vibration (acceleration) in Figure 4 for the first vibration state shows the acceleration when the pallet 201 carrying the electric vehicle 100 moves upward or downward. The magnitude of vibration (acceleration) in Figure 5 for the second vibration state shows the acceleration when the pallet 201 carrying the electric vehicle 100 vibrates due to earthquake shaking. Comparing the magnitude of vibration (acceleration) in the first vibration state and the magnitude of vibration (acceleration) in the second vibration state, both are constant magnitude A1 [m / s²]. 2 Larger tremors have been observed than [the previous one], but the difference between the two is small.

[0041] On the other hand, the distance traveled in the first vibration state in Figure 4 is due to the vertical movement of the pallet 201 on which the electric vehicle 100 is mounted. Therefore, the distance traveled in the first vibration state is limited to a certain range. In the example in Figure 4, the distance traveled in the first vibration state is within the range of L1 [m] to L2 [m]. In contrast, the distance traveled in the second vibration state in Figure 5 is due to the vibration of the pallet 201 caused by the shaking of the earthquake. Once the shaking of the earthquake subsides, the pallet 201 returns to its original position, so the distance traveled in the second vibration state is almost zero. In Figure 5, the distance traveled in the second vibration state is L1 [m] or less. Comparing the distance traveled in the first vibration state and the distance traveled in the second vibration state, there is a large difference between the two. Therefore, by considering the distance traveled in addition to the magnitude of the vibration (acceleration), the vibration detection unit 6 (detection unit 64) can determine whether the state is the first vibration state or the second vibration state.

[0042] The vibration detection unit 6 outputs the detection result to the control unit 51. More specifically, the vibration detection unit 6 outputs a vibration detection signal S1 and a vibration status signal S2 to the control unit 51. The vibration detection signal S1 is a signal indicating whether or not vibration has been detected. For example, the vibration detection signal is a digital signal. That is, if the vibration detection unit 6 outputs a high-level vibration detection signal S1, it indicates that the vibration detection unit 6 has detected vibration. On the other hand, if the vibration detection unit 6 outputs a low-level vibration detection signal S1, it indicates that the vibration detection unit 6 has not detected vibration. In the following, the low-level vibration detection signal may be referred to as the vibration stop signal.

[0043] The vibration state signal S2 is a signal that indicates the state of vibration. For example, the vibration state signal is a digital signal. The vibration state signal S2 is output from the vibration detection unit 6 when a high-level vibration detection signal S1 is output from the vibration detection unit 6. That is, when the vibration detection unit 6 outputs a low-level vibration state signal S2, it indicates the first vibration state (for example, vibration due to an earthquake). On the other hand, when the vibration detection unit 6 outputs a high-level vibration state signal S2, it indicates the second vibration state (for example, vibration due to the movement of pallet 201). Hereafter, the vibration detection signal S1 and the vibration state signal S2 may be collectively referred to simply as the vibration signal.

[0044] The control unit 51, having switched from the first mode to the second mode in response to vibration, switches back to the first mode (return to charging operation) based on the vibration signal from the vibration detection unit 6 while in the second mode (while charging operation is stopped). More specifically, if the vibration detection unit 6 outputs a high-level vibration detection signal S1 and a low-level vibration state signal S2, the vibration state signal S2 indicates that the vibration of the charging device 11 is in the first vibration state, which allows charging. Therefore, the control unit 51 switches back to the first mode after the vibration stops. More specifically, the control unit 51 switches back to the first mode after the output of the vibration detection signal S1 from the vibration detection unit 6 changes to a low level.

[0045] On the other hand, if the vibration detection unit 6 outputs a high-level vibration detection signal S1 and a low-level vibration status signal S2, the vibration status signal S2 indicates that the vibration of the charging device 11 is in a second vibration state where charging is not permitted. In this case, the control unit 51 maintains the second mode (stopping charging operation) even after the vibration stops.

[0046] <Communications Department> The communication unit 7 includes a communication interface device that communicates directly or indirectly via a network N or a repeater, etc., with the higher-level system 2, which includes the controller 22 and the server 21 (see Figure 1). The charging control system 3 is capable of communicating with the higher-level system 2 via the communication interface device. In this disclosure, "capable of communication" means that signals can be sent and received directly or indirectly via a network or a repeater, etc., using an appropriate communication method such as wired communication or wireless communication. The charging control system 3 in this embodiment performs wireless communication with the controller 22.

[0047] <Storage section> The memory unit 8 is used to store information used by the processing unit 5 (see Figure 1). The memory unit 8 includes one or more storage devices. These storage devices include, for example, ROM (Read Only Memory), RAM (Random Access Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), etc. The memory unit 8 may also be used as the memory for the processing unit 5.

[0048] <Power Converter> The power converter 10 is housed within the casing (not shown) of the charging device 11. The power converter 10 may include, for example, an AC-DC converter, a DC-DC converter, etc. The power converter 10 has the function of converting power supplied from an external power source 30 (input power) into charging power to be supplied to the storage battery 101. The input power may be AC ​​power or DC power. The charging power is DC power, but may also be AC ​​power. The current value and voltage value of the charging power are controlled by the control unit 51 of the processing unit 5. In short, when charging the storage battery 101, the charging control system 3 charges the storage battery 101 by converting the input power from the external power source 30 into DC charging power and supplying the converted charging power to the electric vehicle 100.

[0049] <Display section> The display unit 9 is, for example, a display. In this embodiment, when the vibration detection unit 6 detects vibration, the display unit 9 notifies the user of the fact that the vibration detection unit 6 has detected vibration through visual information. Visual information includes, for example, text information on the screen and the light of an indicator lamp (LED). Also in this embodiment, if the display unit 9 determines that the charging cable 41 is not connected to at least one of the charging device 11 and the electric vehicle 100, it notifies the user of the fact that the charging cable 41 is not connected through visual information. The display unit 9 corresponds to the "first notification unit" and the "second notification unit" as referred to in this disclosure.

[0050] (2.4) Operation Description The operation of the charging control system 3 of this embodiment will be explained with reference to Figure 6 and the like. Note that the flowchart shown in Figure 6 is merely one example of the charging control method according to this embodiment, and the order of processing may be changed as appropriate, or processing may be added or omitted as appropriate.

[0051] The charging control system 3 operates when the battery 101 of the electric vehicle 100 is ready for charging. Charging of the battery 101 of the electric vehicle 100 is performed when the charging device 11 is connected to the electric vehicle 100 via the charging cable 41, as shown in Figure 1. More specifically, as shown in Figure 2, the plug of the charging cable 41 is inserted into the outlet 4 of the charging device 11 (see Figure 1), and the connector 40 of the charging cable 41 is connected to the electric vehicle 100 (power receiving unit).

[0052] In the charging control system 3, the control unit 51 starts charging the battery 101 (first mode) (step S1 in Figure 6). More specifically, the control unit 51 charges the battery 101 according to the charging schedule transmitted from the higher-level system 2. The control unit 51 controls the operation of the power converter 10, which converts power supplied from the external power source 30 into charging power to be supplied to the battery 101. At this time, a charging current Ich is output from the power converter 10 to the battery 101 in the circuit between the electric vehicle 100 and the power converter 10.

[0053] Next, the control unit 51 acquires the vibration detection result from the vibration detection unit 6 (step S2 in Figure 6). More specifically, the control unit 51 receives the vibration detection signal S1 output from the vibration detection unit 6. For example, the vibration detection signal S1 from the vibration detection unit 6 is output to the control unit 51 at predetermined intervals.

[0054] If the vibration detection unit 6 detects vibration while the battery 101 is charging in the first mode, the control unit 51 stops the charging operation of the battery 101 (second mode) (step S3 in Figure 6). More specifically, if the control unit 51 receives a high-level vibration detection signal S1 from the vibration detection unit 6, it sets the current that the power converter 10 outputs to the battery 101 to zero.

[0055] At this time, the vibration detection unit 6 determines the vibration state (step S4 in Figure 6). More specifically, the vibration detection unit 6 detects whether the vibration of the charging device 11 is in a first vibration state or a second vibration state. In this embodiment, the calculation unit 63 calculates the magnitude of the vibration and the distance traveled of the charging device 11 based on the detected value of the acceleration sensor 61. The detection unit 64 determines whether the vibration is in a first vibration state or a second vibration state based on the magnitude of the vibration and the distance traveled. The detection unit 64 determines that if the distance traveled is greater than or equal to the second threshold L1 [m] and within a predetermined range (L1 [m] or more and L2 [m] or less), it is in a first vibration state in which charging is permitted. When the detection unit 64 determines that the vibration is in a first vibration state (NO in S4 in Figure 6), the vibration detection unit 6 outputs a low-level vibration state signal S2 to the control unit 51. On the other hand, the detection unit 64 determines that if the magnitude of the vibration (acceleration) is greater than or equal to the first threshold A1, and the distance traveled is less than the second threshold L1, then it is in a second vibration state in which charging is not permitted. When the detection unit 64 determines that the vibration is in a second vibration state (YES in S4 in Figure 6), the vibration detection unit 6 outputs a high-level vibration state signal S2 to the control unit 51.

[0056] Next, when the control unit 51 receives a vibration stop signal (low-level vibration detection signal S1) from the vibration detection unit 6 (step S5 in Figure 6), if it is determined in step S4 that the first vibration state is occurring (NO in S4 in Figure 6), it determines whether the charging cable 41 is connected before restarting the charging operation (step S6 in Figure 6). More specifically, the control unit 51 sets the magnitude of the current that the power converter 10 outputs to the storage battery 101 to a reference current value Is. The reference current value Is is a current value lower than the charging current Ich. If the control unit 51 detects current in the circuit between the electric vehicle 100 and the power converter 10, it determines that the charging cable 41 is connected to the charging device 11 and the electric vehicle 100.

[0057] If the control unit 51 determines that the charging cable 41 is connected (Yes in S6 of Figure 6), it restarts the charging operation (first mode) (step S7 of Figure 6). More specifically, the control unit 51 controls the operation of the power converter 10, which converts the power supplied from the external power supply 30 into charging power to be supplied to the battery 101. At this time, a charging current Ich is output from the power converter 10 to the battery 101 in the circuit between the electric vehicle 100 and the power converter 10.

[0058] Furthermore, if it is determined in step S4 that the second vibration state is present (YES in S4 of Figure 6), or if it is determined in step S6 that the charging cable 41 is not connected, the control unit 51 terminates the process without restarting charging.

[0059] According to the charging control system 3 and charging device 11 of this embodiment, it is possible to temporarily stop the charging operation if, for example, an earthquake occurs while the electric vehicle 100 is being charged (step S3 in Figure 6). As a result, even if the charging cable 41 becomes detached from the electric vehicle 100 due to the vibrations of the earthquake, the charging cable 41 is not energized, thus improving safety. Therefore, according to this embodiment, it is possible to provide an electric vehicle 100 charging technology that takes disaster prevention into consideration.

[0060] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, if a reference current value Is is not detected while charging is stopped, it can be determined that the charging cable 41 has become detached due to, for example, earthquake vibrations (step S6 in Figure 6). Also, in step S6, the output current of the power converter 10 is set to a reference current value Is that is lower than the charging current Ich, so there is no problem even if a user or the like touches the connector of the detached charging cable 41.

[0061] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, charging can be resumed only if the charging cable 41 is properly connected after the vibration stops (S7 in Figure 6). This makes it possible to prevent secondary damage caused by earthquakes that may occur while the electric vehicle 100 is being charged.

[0062] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, it is possible to determine whether the vibration is caused by an earthquake or by movement in a mechanical multi-story parking garage based on the value detected by the vibration detection unit 6 (step S4 in Figure 6).

[0063] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, if vibration caused by an earthquake is detected (YES in step S4 of Figure 6), charging will not be resumed after the vibration stops. This prevents secondary damage caused by earthquakes that may occur while the electric vehicle 100 is being charged.

[0064] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, if vibration caused by movement in a mechanical multi-story parking garage is detected (YES in step S4 of Figure 6), charging can be resumed after the vibration stops.

[0065] Furthermore, according to the charging control system 3 and charging device 11 of this embodiment, the display unit 9 can notify users and managers of the parking lot 210 that the vibration detection unit has detected vibration and that the charging cable 41 is not connected. Note that the above information is not limited to visual information, but may also be notified by sound information such as alarms, or by other means such as email.

[0066] (3) Variant The above embodiments are merely one of many embodiments of this disclosure. The above embodiments can be modified in various ways depending on the design, etc., as long as they achieve the objectives of this disclosure.

[0067] The following lists some modifications of the above embodiment. The modifications described below can be combined and applied as appropriate.

[0068] The entity executing the charge control system 3 or charge control method in this disclosure includes a computer system. The computer system mainly consists of a processor and memory as hardware. The processor executes a program recorded in the computer system's memory to realize the function of the entity executing the charge control system 3 or charge control method in this disclosure. The program may be pre-recorded in the computer system's memory, provided via a telecommunications line, or provided on a non-temporary recording medium such as a memory card, optical disk, or hard disk drive that is readable by the computer system. The processor of the computer system consists of one or more electronic circuits including semiconductor integrated circuits (ICs) or large-scale integrated circuits (LSIs). The integrated circuits referred to here, such as ICs or LSIs, are named differently depending on the degree of integration and include integrated circuits called system LSIs, VLSIs (Very Large Scale Integration), or ULSIs (Ultra Large Scale Integration). Furthermore, FPGAs (Field-Programmable Gate Arrays) that are programmed after the manufacture of LSIs, or logic devices that allow for the reconfiguration of junction relationships or circuit compartments within LSIs, can also be used as processors. Multiple electronic circuits may be integrated onto a single chip or distributed across multiple chips. Multiple chips may be integrated onto a single device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller also consists of one or more electronic circuits, including semiconductor integrated circuits or large-scale integrated circuits.

[0069] Furthermore, it is not essential for the charging control system 3 to have multiple functions integrated into a single housing; the components of the charging control system 3 may be distributed across multiple housings. In addition, at least some of the functions of the charging control system 3, for example, some of the functions of the vibration detection unit 6, may be implemented by the cloud (cloud computing), etc. For example, vibration data from a vibration meter installed near the parking lot 210 may be used to indirectly detect vibrations of the charging device 11.

[0070] Furthermore, in this embodiment, at least some of the functions of the charging system 1, which are distributed across multiple devices, may be consolidated into a single housing. For example, some of the functions of the charging system 1, which are distributed across the charging device 11 and the higher-level system 2, may be consolidated into a single housing.

[0071] In this embodiment, where "greater than or equal to" is used in the comparison of two values ​​such as data, it may also be used as "greater than". In other words, whether or not the case where the two values ​​are equal is included in the comparison of two values ​​can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between "greater than or equal to" and "greater than". Similarly, where "less than or equal to" is used, it may also be used as "less than".

[0072] (Other variations) In this embodiment, the vibration detection unit 6 determines whether the charging device 11 is in a first vibration state or a second vibration state based on the magnitude of the vibration and the distance traveled. In a modified example, the vibration detection unit 6 may determine whether the charging device 11 is in a first vibration state or a second vibration state based on at least one of the magnitude of the vibration, the distance traveled, and the direction of movement. For example, the vibration detection unit 6 may determine that the charging device 11 is in a first vibration state if the direction of movement coincides with a predetermined direction of movement. This is because the movement of the pallet 201 in the parking lot 210 as shown in Figure 2 is limited to a predetermined direction (up and down in Figure 2).

[0073] In addition, the vibration detection unit 6 may use a trained model to detect whether the system is in a first vibration state or a second vibration state. The vibration detection unit 6 may also detect whether the system is in a first vibration state or a second vibration state based on changes in its detected values ​​(more specifically, at least one of the vibration magnitude, distance traveled, and direction of travel). The trained model is stored, for example, in the memory unit (not shown) of the vibration detection unit 6. The trained model may be a model that has been trained in advance, or it may be a trained model that is retrained while actually being used in the charging device 11.

[0074] In this embodiment, the parking lot 210 is a mechanical multi-story parking garage. Mechanical multi-story parking garages are not limited to the "elevating type" in which the pallet 201 moves vertically, as shown in Figure 2, but come in various types. For example, in a "elevating and traversing type" mechanical multi-story parking garage, the pallet moves not only vertically but also horizontally. When considering use in such various types of mechanical multi-story parking garages, a method of determining the vibration state using a trained model is suitable.

[0075] In this embodiment, the vibration detection unit 6 is equipped with a 3-axis acceleration sensor, but it may be equipped with other sensors as long as they can detect vibrations from the charging device 11.

[0076] In this embodiment, the charging control system 3 and the charging device 11 are equipped with a vibration detection unit 6. The vibration detection unit 6 may be provided outside the charging device 11, as long as it can detect vibrations of the charging device 11. For example, it may be provided on the pole 202 in Figure 2, or on the pallet 201.

[0077] In this embodiment, the charging device 11 is equipped with an outlet, and the outlet 4 can be connected to the electric vehicle 100 via a charging cable 41. The charging device 11 may also be equipped with a charging cable 41 instead of an outlet 4.

[0078] In this embodiment, the outlet 4 and the charging control system 3 are housed in the housing of the charging device 11, but the outlet 4 and the charging control system 3 may be housed in separate housings.

[0079] (summary) Based on the embodiments described above, the following aspects are disclosed.

[0080] The first embodiment of the charging control system (3) comprises a control unit (51) and a vibration detection unit (6). The control unit (51) controls the charging operation of a charging device (11) that is connected to the electric vehicle (100) via a charging cable (41) and charges the battery (101) of the electric vehicle (100). The vibration detection unit (6) detects vibrations of the charging device (11). The control unit (51) is switchable between a first mode and a second mode. In the first mode, the control unit (51) charges the battery (101). In the second mode, it stops charging the battery (101). If the vibration detection unit (6) detects vibration while operating in the first mode, it switches to the second mode. If the vibration stops while operating in the second mode, it switches back to the first mode.

[0081] According to this embodiment, if vibrations such as those caused by an earthquake are applied to the charging device (11) while the electric vehicle (100) is being charged, the charging operation can be temporarily stopped. As a result, even if the charging cable (41) becomes detached from the electric vehicle (100) due to vibrations such as an earthquake, the charging cable (41) is not energized, thus improving safety.

[0082] In the second embodiment of the charging control system (3), the control unit (51) can control the operation of a power converter (10) that converts power supplied from an external power source (30) into charging power to be supplied to a battery (101). In the second mode, the control unit (51) sets the magnitude of the current that the power converter (10) outputs to the battery (101) to a reference current value (Is) without stopping the operation of the power converter (10). If no current is detected in the circuit between the electric vehicle (100) and the power converter (10), it is determined that the charging cable (41) is not connected to at least one of the charging device (11) and the electric vehicle (100). The reference current value (Is) is a current value lower than the charging current (Ich).

[0083] According to this embodiment, if no current is detected in the circuit between the electric vehicle (100) and the power converter (10) while charging is stopped, it can be determined that the charging cable (41) has become detached due to vibrations such as an earthquake. Furthermore, since the reference current value (Is) is lower than the charging current (Ich), there will be no problem even if a user or others touch the connector (40) of the detached charging cable (41). This improves safety.

[0084] In the third embodiment of the charging control system (3), the control unit (51) can control the operation of a power converter (10) that converts power supplied from an external power source (30) into charging power to be supplied to a storage battery (101). In the second mode, when vibration stops, the control unit (51) sets the magnitude of the current output by the power converter (10) to the storage battery (101) to a reference current value (Is) without stopping the operation of the power converter (10). When the reference current value (Is) is detected in the circuit between the electric vehicle (100) and the power converter (10), the control unit (51) determines that the charging cable (41) is connected to the charging device (11) and the electric vehicle (100) and switches to the first mode. The reference current value (Is) is a current value lower than the charging current (Ich).

[0085] According to this embodiment, in the second mode, charging can be resumed only if the charging cable (41) is properly connected after the vibration stops.

[0086] In the fourth embodiment of the charging control system (3), in any one of the first to third embodiments, the vibration detection unit (6) detects whether the vibration is in a first vibration state or a second vibration state. The first vibration state is a vibration state in which charging is permitted. The second vibration state is a vibration state in which charging is not permitted. In the second mode, if the control unit (51) detects that the vibration is in the first vibration state, it switches to the first mode after the vibration stops.

[0087] According to this embodiment, if a vibration condition that does not allow charging (for example, in the case of an earthquake) is detected, charging will not be resumed after the vibration stops. This improves safety.

[0088] The fifth embodiment of the charging control system (3) is, in any one of the first to fourth embodiments, a vibration detection unit (6) comprising an acceleration sensor (61), a calculation unit (63), and a detection unit (64). The calculation unit (63) calculates at least one of the vibration magnitude, distance traveled, and direction of travel based on the value detected by the acceleration sensor (61). The detection unit (64) determines whether the state is a first vibration state or a second vibration state based on at least one of the vibration magnitude, distance traveled, and direction of travel.

[0089] According to this embodiment, it is possible to determine whether or not the vibration conditions (for example, vibrations caused by an earthquake or vibrations in a mechanical multi-story parking garage) are acceptable for charging, based on the values ​​detected by the acceleration sensor (61).

[0090] In the sixth embodiment of the charging control system (3), in the fifth embodiment, the detection unit (64) determines that a second vibration state is occurring when the magnitude of the vibration is greater than or equal to a first threshold (A1) and the distance traveled is less than a second threshold (L1).

[0091] According to this embodiment, it can be determined that the vibration is caused by an earthquake. In this case, charging will not resume after the vibration stops. This improves safety.

[0092] In the seventh embodiment of the charging control system (3), in the sixth embodiment, the detection unit (64) determines that a first vibration state is occurring if the travel distance is greater than or equal to a second threshold (L1) and within a predetermined range (L1 or more and L2 or less).

[0093] According to this embodiment, for example, it can be determined that the vibration is caused by the movement of a pallet (201) in a mechanical multi-story parking garage. In this case, charging can be resumed after the vibration stops.

[0094] In the eighth aspect of the charging control system (3), in any one of the fifth to seventh aspects, the detection unit (64) determines that a first vibration state is present if the direction of movement coincides with a predetermined direction of movement.

[0095] According to this embodiment, for example, it can be determined that the vibration is caused by the movement of a pallet (201) in a mechanical multi-story parking garage. In this case, charging can be resumed after the vibration stops.

[0096] In the ninth aspect of the charging control system (3), in the fourth aspect, the vibration detection unit (6) uses a learned model to detect whether the state is a first vibration state or a second vibration state. The detection unit (64) detects whether the state is a first vibration state or a second vibration state based on the change in the value detected by the vibration detection unit (6).

[0097] According to this embodiment, a trained model can be used to determine whether or not the vibration conditions (e.g., vibrations in a mechanical multi-story parking garage) are acceptable for charging.

[0098] The charging control system (3) of the tenth embodiment further comprises a first notification unit (9) in any one of the first to ninth embodiments. The first notification unit (9) notifies that the vibration detection unit (6) has detected vibration when the vibration detection unit (6) detects vibration.

[0099] According to this embodiment, it is possible to notify that vibration has been detected.

[0100] The charging control system (3) of the eleventh embodiment further comprises a second notification unit (9) in either the second or third embodiment. The second notification unit (9) notifies that the charging cable (41) is not connected if it is determined that the charging cable (41) is not connected to at least one of the charging device (11) and the electric vehicle (100).

[0101] According to this embodiment, for example, if the charging cable (41) falls off, it is possible to notify that the charging cable (41) has fallen off.

[0102] The charging device (11) of the twelfth embodiment comprises a charging control system (3) of any one of the first to eleventh embodiments and an outlet (4) that can be connected to an electric vehicle (100) via a charging cable (41).

[0103] A charging system (1) according to the 13th embodiment includes a host system (2), a plurality of charging devices (11), and a plurality of vibration detection units (6). The plurality of charging devices (11) are configured to communicate with the host system (2). The plurality of vibration detection units (6) detect vibrations in each of the plurality of charging devices (11). Each of the plurality of charging devices (11) has a control unit (51) that controls the charging operation of the battery (101) of an electric vehicle (100) connected via a charging cable (41). The control unit (51) can switch between a first mode in which it charges the battery (101) according to a command from the host system (2), and a second mode in which it stops charging the battery (101). If a vibration detection unit (6) detects vibration while operating in the first mode, it switches to the second mode.

[0104] The charging control method of the 14th embodiment is switchable between a first mode for charging the battery of an electric vehicle and a second mode for stopping the charging of the battery. The charging control method includes a first step (S1 in Figure 6), a second step (S2 in Figure 6), a third step (S3 in Figure 6), and a fourth step (S7 in Figure 6). In the first step, the charging operation of the battery (101) is performed in the first mode. In the second step, the vibration detection result is obtained from the vibration detection unit (6). In the third step, if the vibration detection unit (6) detects vibration while operating in the first mode, the system switches to the second mode. In the fourth step, if the vibration stops while operating in the second mode, the system switches back to the first mode.

[0105] The program of the 15th embodiment is a program that causes one or more processors of a computer system to execute the charging control method of the 14th embodiment.

[0106] The configurations relating to the second to eleventh aspects are not essential to the charging control system (3) and can be omitted as appropriate. [Explanation of Symbols]

[0107] 1 Charging System 2. Higher-level system 3. Charging control system 4 outlets 5 Processing Unit 6. Vibration detection unit 7 Communications Department 8 Memory section 9 Display section 10 Power Converters 11 Charging device 30 External power supply 40 connectors 41 Charging Cable 51 Control Unit 61 Accelerometer 62 Processing Unit 63 Calculation Section 64 Detection unit 100 Electric vehicles 101 Storage Battery 200 facilities 210 Parking

Claims

1. A control unit that controls the charging operation of a charging device connected to an electric vehicle via a charging cable and which charges the battery of the electric vehicle, The charging device includes a vibration detection unit for detecting vibrations, The control unit, It is possible to switch between a first mode for charging the battery and a second mode for stopping the charging of the battery. If the vibration detection unit detects vibration while operating in the first mode, it switches to the second mode. If the vibration stops while operating in the second mode, the system switches to the first mode. Charging control system.

2. The control unit can control the operation of the power converter, which converts power supplied from an external power source into charging power supplied to the battery. The control unit, In the second mode, the magnitude of the current output by the power converter to the battery is set to a reference current value without stopping the operation of the power converter, and if no current is detected in the circuit between the electric vehicle and the power converter, it is determined that the charging cable is not connected to at least one of the charging device and the electric vehicle. The aforementioned reference current value is a current value lower than the charging current. The charging control system according to claim 1.

3. The control unit can control the operation of the power converter, which converts power supplied from an external power source into charging power supplied to the battery. The control unit, In the second mode, if the vibration stops, the power converter sets the magnitude of the current it outputs to the battery to a reference current value without stopping the operation of the power converter, and if the reference current value is detected in the circuit between the electric vehicle and the power converter, it is determined that the charging cable is connected to the charging device and the electric vehicle, and the system switches to the first mode. The aforementioned reference current value is a current value lower than the charging current. The charging control system according to claim 1.

4. The vibration detection unit is The system detects whether the vibration is in a first vibration state that allows charging, or a second vibration state that does not allow charging. The control unit, In the second mode, if the vibration is detected to be in the first vibration state, the system switches to the first mode after the vibration stops. The charging control system according to claim 1.

5. The vibration detection unit is Accelerometer and A calculation unit that calculates at least one of the magnitude of vibration, distance traveled, and direction of movement based on the detected value of the acceleration sensor, A detection unit determines, based on the calculation result of the calculation unit, which of the first vibration state and the second vibration state it is. Equipped with, The charging control system according to claim 4.

6. The detection unit determines that the second vibration state exists when the magnitude of the vibration is equal to or greater than a first threshold and the distance traveled is less than a second threshold. The charging control system according to claim 5.

7. The detection unit is If the distance traveled is greater than or equal to the second threshold and within a predetermined range, it is determined that the first vibration state exists. The charging control system according to claim 6.

8. The detection unit is If the aforementioned direction of movement coincides with a predetermined direction of movement, it is determined that the first vibration state is present. The charging control system according to claim 5.

9. The vibration detection unit uses a trained model to detect which of the first vibration state and the second vibration state is present, and detects which of the first vibration state and the second vibration state is present based on the change in the value detected by the vibration detection unit. The charging control system according to claim 4.

10. The system further includes a first notification unit that notifies the system that the vibration detection unit has detected vibration when the vibration detection unit detects vibration. The charging control system according to claim 1.

11. If it is determined that the charging cable is not connected to at least one of the charging device and the electric vehicle, the device further includes a second notification unit that notifies that the charging cable is not connected. The charging control system according to claim 2.

12. The charging control system according to claim 1, The electric vehicle is equipped with an outlet that can be connected via a charging cable, Charging device.

13. The higher-level system, Multiple charging devices configured to communicate with the aforementioned higher-level system, Multiple vibration detection units for detecting vibrations in each of the multiple charging devices, Includes, Each of the aforementioned multiple charging devices has a control unit that controls the charging operation of the battery of an electric vehicle connected via a charging cable. The control unit, The system is switchable between a first mode in which the battery is charged according to a command from the higher-level system, and a second mode in which the charging of the battery is stopped. If the vibration detection unit detects vibration while operating in the first mode, it switches to the second mode. Charging system.

14. It is possible to switch between a first mode for charging the battery of an electric vehicle and a second mode for stopping the charging of the battery, A first step is to perform a charging operation of the storage battery in the first mode, The second step is to obtain the vibration detection result from the vibration detection unit, If the vibration detection unit detects vibration while operating in the first mode, the third step is to switch to the second mode, If the vibration stops while operating in the second mode, the fourth step is to switch to the first mode, including, Charging control method.

15. One or more processors in a computer system, To perform the charging control method described in claim 14, program.

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