VEHICLE BATTERY CHARGER

Abstract

Vehicle battery charging device, comprising: a charging port (3) that charges a vehicle battery (2) attached to a vehicle (1) from an external source; a relay section (4) which is electrically connected to the charging port (3) and the vehicle battery (2); a fitting state detection means which is provided at the charging port (3) and detects a fitted state of a charging connection part with respect to the charging port (3); a motion state detection means (11) that detects a motion state of the vehicle (1); and a control means (7) that switches the relay section (4) into a connection state in a case in which (i) a signal of the fitted state, indicating that the charging connection part is connected to the charging port (3), is received by the fitting state detection means, and (ii) a charging request from the vehicle battery (2) is received, wherein, when the motion state of the vehicle (1) is detected by the motion state detection means (11), the control means (7) performs a determination operation in which the control means (7) determines that an abnormal state occurs in a case in which the fitted state is detected by the fitted state detection means, and the control means (7) prohibits a switching of the connection state of the relay section (4) in a case in which the control means (7) determines that the abnormal state occurs according to the determination operation, characterized in that the control means (7) increments a capture count using an abnormal counter when the fitted state is captured by the determination operation, and the control means (7) determines that the abnormal condition occurs when a count of the abnormal counter exceeds a predetermined number.

Description

[0001] The present disclosure relates to a vehicle battery charging device.

[0002] JP 2009 - 106 053 A discloses that an electric vehicle or a plug-in hybrid vehicle includes a charging device for a vehicle battery, which corresponds to an energy source. The charging device is referred to as a vehicle battery charging device. When a charging plug provided on an external energy source device is connected to a charging port provided on a vehicle, the vehicle battery charging device controls a charging relay to establish communication between the charging port and the vehicle battery and performs charging of the vehicle battery.

[0003] When both a charging request and a connection between the charging plug and the charging port are met, the vehicle battery charging device activates the charging relay. When the connection is established, a signal indicating a charging status is output from the charging port. However, if the connection is not established, the vehicle battery charging device does not activate the charging relay.

[0004] However, the vehicle battery charging device may incorrectly output the signal indicating the fitted state due to a switch failure or a sensor malfunction. Since the vehicle battery charging device receives the signal indicating the fitted state when a charging request is generated, it activates the charging relay to electrically connect the charging terminal to the vehicle battery.

[0005] Since the charging port is connected to the vehicle battery even though the charging plug is not connected to the charging port, a voltage from the vehicle battery is present at one electrode of the charging port. Therefore, it is necessary, for example, to provide an additional method for detecting the fitted state of the charging plug to ensure that a user does not touch the electrode of the charging port.

[0006] Reference is further made to JP 2009-71901A, which was identified as prior art. JP 2009-71901A describes a vehicle battery charging device comprising: a charging port that externally charges a vehicle battery attached to a vehicle; a relay section that is electrically connected to the charging port and the vehicle battery; a state-of-fit sensing means provided at the charging port that detects a state of fit of a charging connection part with respect to the charging port; a motion-of-fit sensing means that detects a motion state of the vehicle; and a control means that switches the relay section to a connected state in a case where (i) a signal of the state of fit, indicating that the charging connection part is connected to the charging port, is received by the state-of-fit sensing means, and (ii) a charging request from the vehicle battery is received.When the motion state of the vehicle is detected by the motion state detection means, the control means performs a determination operation in which the control means determines that an abnormal state occurs in a case where the fitted state is detected by the fitted state detection means, and the control means prohibits a switching of the connection state of the relay section in a case where the control means determines that the abnormal state occurs according to the determination operation.

[0007] Furthermore, reference is made to JP 2010 - 119 168 A, which was also determined to be state of the art.

[0008] The present disclosure was made with regard to the foregoing facts and it is an object of the present disclosure to provide a vehicle battery charging device which, without any extra configuration, can avoid a vehicle battery being electrically connected to a charging port in a case where a charging plug is not inserted (fitted) into the charging port.

[0009] The problem is solved by the characteristics of independent claims. A beneficial further development can be found in the dependent claim.

[0010] According to one aspect of the present disclosure, a vehicle battery charging device comprises a charging port, a relay section, a fitted state detection means (hereinafter also referred to as a fitted state detection means), a motion state detection means, and a control means. The charging port charges a vehicle battery attached to a vehicle from an external source. The relay section is electrically connected to the charging port and the vehicle battery. The fitted state detection means is provided at the charging port and detects a fitted state of a charging connection part with respect to the charging port. The motion state detection means detects a motion state of the vehicle.The control device switches the relay section to a connected state in a case where (i) a signal indicating the charging connection part is connected to the charging port is received by the connected state detection device, and (ii) a charging request for the vehicle battery is received. When the vehicle's motion state is received by the motion state detection device, the control device performs a determination operation in which it determines that an abnormal state is occurring in a case where the connected state is detected by the connected state detection device, and the control device prohibits a switching of the relay section's connected state in a case where the control device determines that the abnormal state is occurring according to the determination operation.

[0011] When the vehicle's motion state is detected by the motion state detection device, it is determined that the vehicle is moving. Since the charging port cannot be connected to the charging connection part of an external power source device when the vehicle is moving, the motion state detection device should not detect the motion state. Therefore, if the motion state detection device detects the motion state after the control device performs the determination operation in the vehicle's motion state, the control device determines that an abnormal state is occurring and prevents switching control of the relay section's connection state.

[0012] If charging of a vehicle battery is performed in a case where the state-of-charge sensor is functioning normally, the state-of-charge sensor detects the fitted state. When the control device receives the charging request, it electrically connects the charging port to the vehicle battery by controlling the relay section, such that the vehicle battery can be charged externally via the relay section and the charging port.

[0013] If the energizing state detection device malfunctions, it detects the energized state even though the charging connection part is not connected to the charging port. In this case, the control device prevents the switching of the relay section's connection state. When charging the vehicle battery, the control device maintains the relay section's off state, even though the charging request is received after the charging connection part is connected to the charging port. Therefore, when the charging connection part is not connected to the charging port, no voltage from the vehicle battery is present at the charging port.

[0014] The foregoing and further tasks, features and advantages of the present disclosure will become more apparent from the following detailed description in conjunction with the drawings. Fig. Figure 1 is a block diagram representing a design of an electric vehicle according to a first embodiment of the present disclosure; Fig. 2 is a flowchart representing a charging relay control; Fig. Figure 3 is a flowchart that represents a fixed-state detection of a determination of a fitted state (hereinafter also referred to as fitting state determination); Fig. 4 is a flowchart representing a teaching operation; and Fig. 5 is a flowchart that illustrates the fixed-state detection of the fitting state determination according to a second embodiment of the present disclosure.

[0015] Embodiments of the present disclosure are explained below with reference to the drawings. In these embodiments, a part corresponding to a feature described in a previous embodiment may be designated with the same reference numeral, and redundant explanation for that part may be omitted. If only one part of a configuration is described in one embodiment, another previous embodiment may be applied to the other parts of the configuration. The parts may be combined, even though it is not explicitly stated that the parts may be combined. The embodiments may be partially combined, even though it is not explicitly stated that the embodiments may be combined, provided that there is no harm in such combination. (First embodiment)

[0016] The following will be according to Fig. 1, Fig. 2, Fig. 3 to Fig. 4 explains a first embodiment of the present disclosure.

[0017] As in Fig. As shown in Figure 1, an electric vehicle 1, corresponding to a vehicle, is equipped with a vehicle battery 2 as an energy source. The vehicle battery 2 is connected to a charging port 3 by means of a charging relay 4, which corresponds to a relay section. The vehicle battery 2 is charged according to a fitted state (connection state) by fitting (connecting) a charging plug 6 into the charging port 3. The charging plug 6 is a charging connection part of an external energy source device 5 and also corresponds to a charging gun. The charging port 3 includes a switch or a sensor that outputs a detection signal Sc corresponding to the fitted state of the charging plug 6, which is inserted (fitted) into the charging port 3. The charging port 3 functions as a means for detecting a fitted state (hereinafter also referred to as a fitting state detection means).

[0018] A controller 7 corresponds to an electronic control unit (ECU) that includes a microcomputer. The controller 7 controls the charging of the vehicle battery 2. The controller 7 transmits control signals to switch the charging relay 4 on and off. In other words, the controller 7 switches the charging relay 4 into a connected or disconnected state.

[0019] Controller 7 receives the detection signal Sc, which indicates the fitted state. Furthermore, controller 7 corresponds to a control device.

[0020] The electric vehicle 1 is further equipped with a charge request switch 8, which indicates a charging start and outputs a charge request signal Sra according to a user operation. An ECU 9 receives the charge request signal Sra from the charge request switch 8 and outputs a charge request signal Sr to the controller 7. The electric vehicle 1 is also equipped with a navigation device 10, which can register a charge request for the vehicle battery 2. When a charging time occurs in a case where the charge request is set in the navigation device 10, the navigation device 10 outputs a charge request signal Srb to the ECU 9. When the ECU 9 receives the charge request signal Srb from the navigation device 10, the ECU 9 outputs the charge request signal Sran to the controller 7.

[0021] A drive motor 11, corresponding to a drive source for the electric vehicle 1, functions as a motion state sensing device. The drive motor 11 outputs a vehicle speed vs, corresponding to a rotational speed, to an ECU 12. The ECU 12 outputs the vehicle speed vs from the drive motor 11 to the controller 7 as a speed signal Ss. A warning lamp 13, corresponding to an instruction device, is provided in an instrument panel within the electric vehicle 1. The controller 7 controls the illumination of the warning lamp 13. The illumination control of the warning lamp 13 is performed to instruct a user in the event of a malfunction in a charging operation of the vehicle battery 2.

[0022] Next, according to Fig. 2, Fig. 3 to Fig. 4. The effects of the foregoing description are explained. Furthermore, a control operation for executing the charging of the vehicle battery 2 of the electric vehicle 1 is explained. When (i) the electric vehicle 1 stops, when (ii) the charging plug 6 of the external power source device 5 is inserted (fitted) into the charging port 3, and when (iii) the controller 7 receives the charging request signal Sr, the controller 7 executes the charging operation.

[0023] In a charging control system for vehicle battery 2, a control unit (not shown) determines the state of charge of the vehicle battery 2. When the control unit determines that the charging operation is complete, it transmits a control signal to the controller 7 regarding the charging relay 4 in order to switch off the charging relay 4. If the charging operation is interrupted manually or stopped by a timer, a stop signal is transmitted to the controller 7 to halt the charging operation, and the charging relay 4 is switched off.

[0024] Controller 7 repeatedly executes a charging relay control at an appropriate time interval, as shown in Fig. Figure 2 is used to perform the aforementioned charging operation. At A1, the controller 7 determines whether the charging request signal Sr is received. If the controller 7 determines that the charging request signal Sr is not received (A1: No), the controller 7 proceeds to A2 and maintains the deactivation of the charging relay 4. In other words, the controller 7 prevents the charging relay 4 from being activated. The controller 7 then terminates the current charging relay control. If the controller 7 determines that the charging request signal Sr is received (A1: Yes), the controller 7 proceeds to A3 and receives the detection signal Sc, which indicates the fitted state in which the charging plug 6 is inserted (fitted) into the charging port 3. At A4, the controller 7 determines whether the detection signal Sc is received from the charging port 3.If the controller 7 determines that the detection signal Sc is not being received from charging port 3 (A4: No), the controller 7 proceeds to A5 and continues switching off the charging relay 4.

[0025] If the controller 7 determines that the detection signal Sc is received from charging port 3 (A4: Yes), the controller 7 proceeds to A6 and determines whether charging port 3 is in a normal or abnormal state by charging it to a fixed state. In the normal state, the fixed state is not detected. In the abnormal state, the fixed state is detected. If the controller 7 determines that charging port 3 is in a normal state, the controller 7 proceeds to A7 and switches on the charging relay 4 to electrically connect charging port 3 to the vehicle battery 2. Therefore, the vehicle battery 2 can be charged by the external power source device 5 via the charging plug 6, charging port 3, and charging relay 4.

[0026] If the controller 7 determines that the charging port 3 is in an abnormal state, the controller 7 proceeds to operation A8. At A8, the controller 7 switches off the charging relay 4 and terminates the current charging relay control. The abnormal state is a state other than the normal state. The aforementioned operations are performed by the controller 7 when the vehicle battery 2 is being charged by the user.

[0027] Next, according to Fig. Section 3 describes a detection operation performed by the controller 7 for the fixed state of the charging port 3. When the fitted state of the charging plug 6 with respect to the charging port 3 is detected, a detection section of the charging port 3 outputs the detection signal Sc, which indicates the fitted state in which the charging plug 6 is inserted into the charging port 3. During a fixed state detection, an operation is performed to determine whether the above normal operation is executed.

[0028] If the fitted state is detected even though the charging plug 6 is not inserted into (connected to) the charging port 3, due to a malfunction of the charging port 3, a connection voltage from the vehicle battery 2 is applied to an electrode section of the charging port 3. For example, if the charging relay 4 is stuck, the malfunction of the charging port 3 can be caused. Alternatively, the malfunction of the charging port 3 can be caused by an incorrect operation. The stuck-state detection is performed to prevent the aforementioned malfunction.

[0029] Controller 7 repeatedly performs the fixed-state detection, as in Fig. Figure 3 shows that the process occurs over a suitable time period. At B1, the controller 7 receives the speed signal Ss, which is detected by the ECU 12 based on the vehicle speed vs, and determines a driving state of the electric vehicle 1. Specifically, the controller 7 determines that the electric vehicle 1 is in the driving state corresponding to a motion state in which the driving speed of the electric vehicle 1 is greater than or equal to a predetermined speed. In this case, the electric vehicle 1 is moving. A condition that the driving speed is greater than or equal to the predetermined speed is necessary to eliminate effects caused by a downhill slope.

[0030] If the controller 7 determines that the electric vehicle 1 is not moving (B1: No), the controller 7 terminates the current state detection. If the controller 7 determines that the electric vehicle 1 is moving (B1: Yes), the controller 7 proceeds to B2 and loads the fitted state of the charging port 3. In this case, since the electric vehicle 1 is in the moving state, it is impossible for the charging plug 6 of the external power source device 5 to be inserted into the charging port 3. Therefore, if the fitted state of the charging port 3 is not detected, the charging port 3 functions normally.

[0031] If controller 7 does not detect the fitted state (B3: No), controller 7 proceeds to B4 and determines whether the abnormal state occurs. If controller 7 determines that the abnormal state does not occur (B4: No), controller 7 determines that the normal state occurs and terminates the current fixed-state detection. In the above description, the malfunction is not generated in a case where the electric vehicle 1 is moving. In this case, the charging operation can be carried out in the Fig. The charging relay control shown in section 2 can be implemented.

[0032] Furthermore, if controller 7 determines that the abnormal state does not occur, and if controller 7 determines that a value (AC) of an abnormal counter is less than or equal to a predetermined number (PN), controller 7 temporarily determines that the normal state occurs. The value of the abnormal counter corresponds to a count of the abnormal counter.

[0033] If controller 7 determines that the abnormal state is already occurring (B4: Yes), the controller terminates the current fixed-state acquisition. In a case where controller 7 determines that the abnormal state is already occurring when the fitted state is not being acquired, controller 7 temporarily determines that the abnormal state is occurring. It is necessary to determine that the abnormal state is occurring in a case where the fitted state is not being acquired due to noise, after controller 7 has determined that the abnormal state is occurring.

[0034] If controller 7 determines that the fitted state has been captured (B3: Yes), controller 7 proceeds to B6 and determines whether the value of the abnormal counter is less than or equal to the predetermined number. The abnormal counter is provided in controller 7. If controller 7 determines that the value of the abnormal counter is less than or equal to the predetermined number (B6: Yes), controller 7 proceeds to B7. At B7, controller 7 adds one to the abnormal counter and ends the current fixed-state capture. If controller 7 determines that the value of the abnormal counter exceeds the predetermined number (B6: No), controller 7 stores the abnormal state as a capture result.

[0035] Furthermore, controller 7 determines that the abnormal state occurs when the value of the abnormal counter exceeds the predetermined number, in order to prevent erroneous acquisition. For example, in the case of erroneous acquisition, the acquisition signal Sc is captured due to noise when controller 7 performs an operation of B2. Since there is an extremely low probability that the acquisition signal Sc will be continuously captured due to noise with the frequency corresponding to the predetermined number, controller 7 performs the acquisition operation relatively accurately.

[0036] During steady-state detection, when controller 7 determines that an abnormal state has occurred, controller 7 performs a notification operation. Controller 7 repeatedly performs the notification operation at appropriate time intervals.

[0037] If controller 7 determines that the abnormal condition occurs, it informs the user. At C1, controller 7 determines whether the abnormal condition occurs. If controller 7 determines that the abnormal condition does not occur (C1: No), controller 7 proceeds to C2 and turns off warning lamp 13. If controller 7 determines that the abnormal condition occurs (C1: Yes), controller 7 proceeds to C3 and illuminates warning lamp 13.

[0038] Accordingly, the user can recognize that an abnormal condition is occurring by observing the illumination status of warning light 13, which is located on the dashboard. The user can then recognize that a repair is necessary. Furthermore, since the charging operation is not performed when the abnormal condition is present, the user can quickly address this abnormality.

[0039] According to the first embodiment, since the detection operation for the fixed state of the charging port 3 is performed when the electric vehicle 1 is in motion and the charging plug 6 is not inserted into the charging port 3, it is possible to prevent the connection voltage of the vehicle battery 2 from being applied to the electrode section of the charging port 3. Therefore, a safe state can be ensured without the need for additional safety measures to prevent the user's hand from coming into contact with the charging port 3.

[0040] According to the first embodiment, since the detection operation for the fixed state of the charging port 3 is performed automatically when the electric vehicle 1 is moving, it is unnecessary for the user to confirm a condition that the charging plug 6 is not inserted into the charging port 3. Alternatively, the detection operation can definitely be performed even if the user forgets to remove the charging plug 6.

[0041] During the detection operation, when the controller 7 performs the notification operation by using the warning lamp 13, the user can recognize that the abnormal condition is occurring and quickly take care of the abnormality. (Second embodiment)

[0042] Fig. Figure 2 is a flowchart illustrating a charging relay control according to a second embodiment of the present disclosure. The second embodiment has the feature that the fixed-state detection is reliably performed even in cases where a disturbance, such as noise, is regularly generated. These features differ from those of the first embodiment. According to the first embodiment, if the disturbance is repeatedly generated several times in a case where the controller 7 is charging the fitted state, faulty detection can occur. In this case, charging of the vehicle battery 2 cannot be performed, even though no malfunction is generated. According to the second embodiment, faulty detection can be avoided.

[0043] Fig. Figure 5 is a flowchart illustrating the fixed-state detection for the fitting state determination according to the second embodiment of the present disclosure. The controller 7 repeatedly performs the fixed-state detection as shown in Fig. As shown in Figure 5, at a suitable time period. At B1, the controller 7 receives the speed signal Ss, which is detected by the ECU 12 based on the vehicle speed vs, and determines the driving state of the electric vehicle 1. If the controller 7 determines that the electric vehicle 1 is driving (B1: Yes), the controller 7 proceeds to B2 and loads the fitted state of the charging port 3.

[0044] If controller 7 does not detect the fitted state (B3: No), controller 7 proceeds to B4 and determines whether the abnormal state occurs. If controller 7 determines that the abnormal state does not occur (B4: No), controller 7 determines that the normal state occurs and terminates the current fixed-state detection.

[0045] If controller 7 determines that the abnormal condition is already occurring (B4: Yes), controller 7 proceeds to B10 and determines whether the value (NC) of a normal counter is less than or equal to the predetermined count. The value of the normal counter corresponds to a count of the normal counter. If controller 7 determines that the abnormal condition occurs only once due to noise, controller 7 can determine that the normal condition occurs by using the normal counter. Specifically, if controller 7 determines that no abnormal condition occurs according to the predetermined count, controller 7 determines that the normal condition occurs. If controller 7 determines that the value of the normal counter is less than or equal to the predetermined count, controller 7 adds one to the normal counter.

[0046] If controller 7 determines that the value of the normal counter exceeds the predetermined number (B10: No), controller 7 proceeds to B12 and clears the value of the abnormal counter (sets the value of the abnormal counter to zero). At B13, controller 7 determines that the normal state occurs. In other words, controller 7 aborts a determination for the abnormal state to determine that the normal state occurs.

[0047] If controller 7 determines that the fitted state has been captured (B3: Yes), controller 7 proceeds to B6 and determines whether the value of the abnormal counter is less than or equal to the predetermined count. If controller 7 determines that the value of the abnormal counter is less than or equal to the predetermined count (B6: Yes), controller 7 proceeds to B7. At B7, controller 7 adds one to the abnormal counter and ends the current fitted state capture. If controller 7 determines that the value of the abnormal counter exceeds the predetermined count (B6: No), controller 7 proceeds to B9 and clears the value of the normal counter (sets the value of the normal counter to zero). At B8, controller 7 stores the abnormal state as the capture result.

[0048] According to the second embodiment, where erroneous detection due to noise can occur after the controller 7 determines that an abnormal state has occurred once, the erroneous detection can be avoided by determining that the normal state occurs after the controller 7 determines that an abnormal state has occurred once, even though the disturbance, such as noise, is simply generated. This prevents the charging operation of the vehicle battery from being recklessly prohibited. (Further embodiment)

[0049] The present disclosure is not limited to the foregoing embodiments and can be applied to different embodiments within the spirit and scope of the present disclosure. For example, the present disclosure can be modified or arranged as follows.

[0050] In fixed-state detection, the condition that the vehicle speed is greater than or equal to the predetermined speed is used to determine the motion state of the electric vehicle 1. However, the motion state can also be determined in cases where the vehicle speed is not zero. Furthermore, the predetermined speed is set to prevent erroneous detection. Therefore, the predetermined speed can be set to an appropriate value that avoids erroneous detection.

[0051] Alternatively, the state of motion can be determined by ascertaining whether the rotational speed of the drive motor 11 is greater than or equal to a predetermined rotational speed. Alternatively, the state of motion can be determined in a case where the rotational speed is not zero.

[0052] The motion state detection device is not limited to the drive motor. It can use a component that detects the rotational speed of a wheel. Alternatively, it can detect the motion state through a variation obtained by a navigation device.

[0053] During fixed-state detection, when controller 7 determines that an abnormal state has occurred, warning lamp 13 is illuminated by the notification operation. An audible signal can be used to indicate that the abnormal state has occurred. Furthermore, the audible signal can replace warning lamp 13 or can work in conjunction with it. Alternatively, an external communication device can be used to automatically notify that the abnormal state has occurred.

[0054] According to the foregoing embodiments, the present disclosure is applied to the electric vehicle 1. However, the present disclosure can be applied to any vehicle battery charging device that includes a vehicle battery which can be charged externally via a charging port.

[0055] According to the foregoing embodiments, operations are performed in Fig. 2, Fig. 3, Fig. 4 to Fig.5. Executed at an appropriate time period. The appropriate time period may be seconds. Alternatively, the appropriate time period may be set to a unit less than or greater than one second. The predetermined count used to determine the abnormal or normal state counter in a case where the controller determines that the abnormal or normal state is occurring is set to a value greater than one to remove the effect of noise. The predetermined count may be set to five or ten or more. Alternatively, the predetermined count may be set to a value that is sufficiently relevant to the appropriate time period to allow for an appropriate time to be set for the fixed-state detection.

[0056] According to the foregoing embodiments, the charging relay 4 is used as the relay section. However, a configuration can be used which is connected or disconnected by switching to turn the semiconductor switching element on and off.

Claims

[1] Vehicle battery charging device comprising: a charging port (3) that charges a vehicle battery (2) attached to a vehicle (1) from an external source; a relay section (4) which is electrically connected to the charging port (3) and the vehicle battery (2); a fitting state detection means which is provided at the charging port (3) and detects a fitted state of a charging connection part with respect to the charging port (3); a motion state detection means (11) that detects a motion state of the vehicle (1); and a control means (7) that switches the relay section (4) into a connection state in a case in which (i) a signal of the fitted state, indicating that the charging connection part is connected to the charging port (3), is received by the fitting state detection means, and (ii) a charging request from the vehicle battery (2) is received, wherein, when the motion state of the vehicle (1) is detected by the motion state detection means (11), the control means (7) performs a determination operation in which the control means (7) determines that an abnormal state occurs in a case in which the fitted state is detected by the fitted state detection means, and the control means (7) prohibits a switching of the connection state of the relay section (4) in a case in which the control means (7) determines that the abnormal state occurs according to the determination operation, characterized by , that the control means (7) increments a capture count using an abnormal counter when the fitted state is captured by the determination operation, and the control means (7) determines that the abnormal condition occurs when a count of the abnormal counter exceeds a predetermined number. [2] Vehicle battery charging device comprising: a charging port (3) that charges a vehicle battery (2) attached to a vehicle (1) from an external source; a relay section (4) which is electrically connected to the charging port (3) and the vehicle battery (2); a fitting state detection means which is provided at the charging port (3) and detects a fitted state of a charging connection part with respect to the charging port (3); a motion state detection means (11) that detects a motion state of the vehicle (1); and a control means (7) that switches the relay section (4) into a connection state in a case in which (i) a signal of the fitted state, indicating that the charging connection part is connected to the charging port (3), is received by the fitting state detection means, and (ii) a charging request from the vehicle battery (2) is received, wherein, when the motion state of the vehicle (1) is detected by the motion state detection means (11), the control means (7) performs a determination operation in which the control means (7) determines that an abnormal state occurs in a case in which the fitted state is detected by the fitted state detection means, and the control means (7) prohibits a switching of the connection state of the relay section (4) in a case in which the control means (7) determines that the abnormal state occurs according to the determination operation, characterized by , that the control agent (7) performs the determination operation after the control agent (7) determines that the abnormal condition occurs, the control means (7) increments a capture count using the normal counter if the fitted state is not captured by the fitted state capture means, and the control device (7) terminates a determination of the abnormal condition if a count of the normal counter exceeds the predetermined number. [3] Vehicle battery charging device according to one of claims 1 or 2, furthermore characterized by : an instructional tool (13) that informs about the occurrence of the abnormal condition, wherein the control instrument (7) is informed by using the instruction instrument (13) that the abnormal condition is occurring when the control instrument (7) determines that the abnormal condition is occurring.

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