Patent ID: 8165739
Filing Date: 2012-04-24
Classification: B60K,B60L,Y02T

Abstract:
1. A malfunction diagnosis system for an electric vehicle on-board device, which includes an electric vehicle on-board device provided in an electric vehicle, the malfunction diagnosis system comprising: a malfunction diagnosis section that performs diagnosis to determine whether a malfunction has occurred in the electric vehicle on-board device when the malfunction diagnosis section is supplied with electric power from at least one of an electric storage section and an external power source; a malfunction diagnosis request section that requests the malfunction diagnosis section to carry out malfunction diagnosis; an external power source connecting section that supplies electric power from the external power source to the malfunction diagnosis section and the malfunction diagnosis request section when the external power source connecting section is connected to the external power source, wherein the external power source is connected to and disconnected from the external power source connecting section; and an external power source connection determination section that determines whether the external power source connecting section is connected to the external power source; wherein the malfunction diagnosis request section changes the number of times that the malfunction diagnosis section carries out malfunction diagnosis according to a request from the malfunction diagnosis request section or a period of time for which the malfunction diagnosis section carries out malfunction diagnosis according to the request from the malfunction diagnosis request section, depending on whether the external power source connection determination section had determined that the external power source connecting section is connected to the external power source; and the number of times that the malfunction diagnosis section carries out malfunction diagnosis according to the request from the malfunction diagnosis request section or the period of time for which the malfunction diagnosis section carries out malfunction diagnosis according to the request from the malfunction diagnosis request section when it is determined that the external power source connecting section is connected to the external power source is greater than the number of times that the malfunction diagnosis section carries out malfunction diagnosis according to the request from the malfunction diagnosis request section or the period of time for which the malfunction diagnosis section carries out malfunction diagnosis according to the request from the malfunction diagnosis request section when it is determined that the external power source connecting section is not connected to the external power source.