Charging control apparatus for performing authentication with external charging equipment for charging vehicle on which battery is mounted

1 . A charging control apparatus that is installed in a vehicle on which a battery is mounted, the charging control apparatus comprising:

a memory storing a first certificate; and

a processor that is configured to:

transmit the first certificate to an external charging equipment that charges the battery and request a first authentication procedure to the external charging equipment;

receive a result of the first authentication procedure from the external charging equipment;

transmit a request to issue an updated first certificate to a management apparatus on a network when the result of the first authentication procedure shows that the first authentication procedure failed due to an invalidity of the first certificate; and

receive the updated first certificate from the management apparatus and request the first authentication procedure by using the updated first certificate.

2 . The charging control apparatus according to claim 1 , wherein the processor is further configured to:

when the result of the first authentication procedure shows that the first authentication procedure failed due to incompatibility between the first certificate and a certificate stored by the external charging equipment and when information that specifies the certificate stored by the external charging equipment has been acquired by the processor from the external charging equipment, allow the management apparatus to issue the first certificate that is compatible with the certificate stored by the external charging equipment, and then again perform the first authentication procedure using the first certificate that is compatible with the certificate stored by the external charging equipment.

3 . The charging control apparatus according to claim 2 , wherein

the processor is configured to, when the result of the first authentication procedure shows that the first authentication procedure failed due to the incompatibility between the first certificate and the certificate stored by the external charging equipment and when the information that specifies the certificate stored by the external charging equipment cannot be acquired by the processor from the external charging equipment, in next and subsequent charging, store identification information of the external charging equipment so that a second authentication procedure is performed with the external charging equipment in place of the first authentication procedure.

4 . The charging control apparatus according to claim 2 , wherein

the first certificate is for ensuring security of communication with the external charging equipment, and

the processor is configured to, when the processor does not have a second certificate for receiving charging from the external charging equipment after the security of the communication with the external charging equipment has been ensured by the first certificate, request the management apparatus to issue the second certificate, and

the processor is configured to, when the processor has acquired the second certificate from the management apparatus in response to the request, perform the first authentication procedure with the external charging equipment.

5 . The charging control apparatus according to claim 4 , wherein

the processor is configured to, when the processor cannot acquire the second certificate from the management apparatus in response to the request, store identification information of the second certificate and, in next and subsequent charging, determine whether or not the second certificate has been acquired, and

the processor configured to, when the second certificate has not been acquired, perform a second authentication procedure with the external charging equipment in place of the first authentication procedure.

6 . The charging control apparatus according to claim 5 , wherein

the first authentication procedure is a plug and charge (PnC) and the second authentication procedure is an external identification means (EIM).

7 . The charging control apparatus according to claim 1 , wherein

the processor is configured to, when the result of the first authentication procedure shows that the first authentication procedure failed due to invalidation of a certificate stored by the external charging equipment, store identification information of the external charging equipment so that a second authentication procedure is performed with the external charging equipment in place of the first authentication procedure.

8 . An on-vehicle charging control device that is configured to control a charging operation from an external charging station to a car battery, the on-vehicle charging control device comprising:

a memory storing a first certificate; and

a processor that is configured to:

transmit the first certificate to an external charging equipment that charges the battery and request a first authentication procedure to the external charging equipment;

receive a result of the first authentication procedure from the external charging equipment;

transmit a request to issue an updated first certificate to a management apparatus on a network when the result of the first authentication procedure shows that the first authentication procedure failed due to an invalidity of the first certificate; and

receive the updated first certificate from the management apparatus and request the first authentication procedure by using the updated first certificate.

9 . A charging control method performed by a processor of a charging control apparatus installed in a vehicle on which a battery is mounted, the method comprising the steps of:

storing a first certificate in a memory:

the processor transmitting the first certificate to an external charging equipment that charges the battery and requesting a first authentication procedure to the external charging equipment;

the processor receiving a result of the first authentication procedure from the external charging equipment;

the processor transmitting a request to issue an updated first certificate to a management apparatus on a network when the result of the first authentication procedure shows that the first authentication procedure failed due to an invalidity of the first certificate; and

the processor receiving the updated first certificate from the management apparatus and requesting the first authentication procedure by using the updated first certificate.

10 . The charging control method according to claim 9 , wherein

when the result of the first authentication procedure shows that the first authentication procedure failed due to incompatibility between the first certificate and a certificate stored by the external charging equipment and when information that specifies the certificate stored by the external charging equipment has been acquired by the processor from the external charging equipment, the method includes allowing the management apparatus to issue the first certificate that is compatible with the certificate stored by the external charging equipment and then again performing the first authentication procedure using the first certificate that is compatible with the certificate stored by the external charging equipment.

11 . The charging control method according to claim 10 , wherein

when the result of the first authentication procedure shows that the first authentication procedure failed due to the incompatibility between the first certificate and the certificate stored by the external charging equipment and when the information that specifies the certificate stored by the external charging equipment cannot be acquired by the processor from the external charging equipment, in next and subsequent charging, the method includes storing identification information of the external charging equipment so that a second authentication procedure is performed with the external charging equipment in place of the first authentication procedure.

12 . The charging control method according to claim 10 , wherein

the first certificate is for ensuring security of communication with the external charging equipment,

when the charging control apparatus does not have a second certificate for receiving charging from the external charging equipment after the security of the communication with the external charging equipment has been ensured by the first certificate, the method includes requesting the management apparatus to issue the second certificate, and

when the charging control apparatus has acquired the second certificate from the management apparatus in response to the request, the method includes performing the first authentication procedure with the external charging equipment.

13 . The charging control method according to claim 12 , wherein

when the charging control apparatus cannot acquire the second certificate from the management apparatus in response to the request, the method includes storing identification information of the second certificate and, in next and subsequent charging, determining whether or not the second certificate has been acquired, and

when the second certificate has not been acquired, the method includes performing a second authentication procedure with the external charging equipment in place of the first authentication procedure.

14 . The charging control method according to claim 9 , wherein

when the result of the first authentication procedure shows that the first authentication procedure failed due to invalidation of a certificate stored by the external charging equipment, the method includes storing identification information of the external charging equipment so that a second authentication procedure is performed with the external charging equipment in place of the first authentication procedure.