Electrical Power Feeding System For Electrical Vehicle

We claim: 1. An electrical power feeding system for vehicle being configured to supply an electrical power to an electrical vehicle (50) having a battery (52) and a charging circuit (51), said battery (52) being provided for producing the electrical power which allows the electrical vehicle (50) to run, the charging circuit (51) being configured to charge the battery (52), whereby the battery (52) is charged by the charging circuit (51), said electrical power feeding system for vehicle comprising: a breaker means; an electrical current measurement unit (2) being configured to measure an electrical current value of a main electrical current which is applied to said breaker means; a control means being configured to generate the electrical power feeding limitation signal when a measured electrical current value of the main electrical current exceeds a first threshold value (Th1), the electrical power feeding limitation signal includes an instruction of limiting the electrical power supplied to the electrical vehicle (50); an electrical power feeding unit for vehicle (4) being configured to receive the electrical power through said breaker means, and being configured to supply the electrical power to the charging circuit (51) of the electrical vehicle (50), said electrical power feeding unit for vehicle (4) being configured to limit the electrical current supplied to the electrical vehicle (50) when the control means generates the electrical power feeding limitation signal, wherein when the measured electrical current value which is measured by the electrical current measurement unit (2) exceeds a second threshold value (Th2) over a predetermined period of time, the control means is configured to send the electrical power feeding limitation signal to said electrical power feeding unit for vehicle (4), wherein when the measured electrical current value becomes lower than a third threshold value (Th3) over a certain period of time under the condition where the electrical power feeding unit for vehicle (4) decreases the electrical current supplied to the electrical vehicle (50), the control means being configured to generate an electrical power feeding limitation cancellation signal,

the electrical power feeding limitation cancellation signal including an instruction of a cancellation of limiting the electrical power supplied to the electrical vehicle (50), wherein said electrical power feeding unit for vehicle (4) is configured to make a cancellation of limiting the electrical power which is supplied to the electrical vehicle (50) on the basis of the electrical power feeding limitation cancellation signal, wherein the second threshold value (Th2) is set to be lower than the first threshold value (Th1), wherein the third threshold value (Th3) is set to be lower than the second threshold value (Th2). 2. The electrical power feeding system for vehicle as claimed in claim 1, wherein said breaker means comprises a distribution board (1), said distribution board (1) comprising a main breaker (11) and a branch breaker (12), said electrical current measurement unit (2) being configured to measure the electrical current value of the main electrical current which is applied to the main breaker (11), said electrical power feeding unit for vehicle (4) being configured to receive the electrical power through said branch breaker (12), and being configured to supply the electrical power to the charging circuit (51) of the electrical vehicle (50), said electrical power feeding unit for vehicle (4) being configured to limit the electrical power which is supplied to the electrical vehicle (50) when the control means generates the electrical power feeding limitation signal. 3. The electrical power feeding system for vehicle as claimed in claim 1 or 2, wherein said electrical power feeding unit for vehicle (4) comprises a connector terminal (5) which is detachably attached to a connector (53) of the vehicle (50), said electrical power feeding unit for vehicle (4) being configured to receive the electrical power through the breaker means, and being configured to supply the electrical power to the charging circuit (51) of the electrical vehicle (50) through the connector terminal (5).

4. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 3, wherein said breaker means has an amperage rating, the first threshold value (Th1) being higher than the amperage rating. 5. The electrical power feeding system for vehicle as claimed in claim 2, wherein said main breaker (11) has an amperage rating, the first threshold value (Th1) being higher than the amperage rating. 6. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 5, wherein said electrical power feeding unit for vehicle (4) comprises a disconnect member (41) being configured to cut a power feeding path which is provided for supplying the electrical power to the electrical vehicle (50), wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) cuts said power feeding path, whereby said electrical power feeding unit for vehicle (4) is configured to limit the electrical power which is supplied to the electrical vehicle (50). 7. The electrical power feeding system for vehicle as claimed in claim 6, wherein said electrical power feeding unit for vehicle (4) comprising an electrical leak detector (43), said electrical leak detector (43) being configured to detect existence or nonexistence of the electrical leakage on the basis of the electrical current which flows through said power feeding path, said electrical leak detector (43) being configured to allow said disconnect member (41) to cut said power feeding path when said electrical leak detector (43) detects the electrical leakage. 8. The electrical power feeding system as claimed in any one of claims 1 to 7, wherein said electrical power feeding unit for vehicle (4) comprises a signal transmission unit (46) being

configured to send signal to the charging circuit (51) of the electrical vehicle (50), wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) being configured to allow said signal transmission unit (46) to send a charge stop signal to the charging circuit (51), the charge stop signal including an instruction of stopping supplying the electrical power to the electrical vehicle (50), whereby said electrical power feeding unit for vehicle (4) is configured to limit the electrical power which is supplied to the electrical vehicle (50). 9. The electrical power feeding system for vehicle as claimed in claim 3, wherein said electrical power feeding unit for vehicle (4) comprises a signal transmission unit (46), said signal transmission unit (46) being configured to send signal to the charging circuit (51) of the electrical vehicle (50) through the connector terminal (5), wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) being configured to allow said signal transmission unit (46) to send the charge stop signal to the charging circuit (51), said charge stop signal including an instruction of stopping the charging, whereby the electrical current being supplied to the electrical vehicle (50) is limited. 10. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 7, wherein said electrical power feeding unit for vehicle (4) comprises a signal transmission unit (46), said signal transmission unit (46) being configured to send the signal to the charging circuit (51) of the electrical vehicle (50), wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) being configured to allow said signal transmission unit (46) to send the electrical current decreasing signal to said charging circuit (51), said electrical current decreasing signal including an instruction of decreasing the electrical current supplied to the

electrical vehicle (50), whereby the electrical current being supplied to the electrical vehicle (50) is limited. 11. The electrical power feeding system for vehicle as claimed in claim 3, wherein said electrical power feeding unit for vehicle (4) comprises a signal transmission unit (46), said signal transmission unit (46) being configured to send signal to the charging circuit (51) of the electrical vehicle (50) through said connector terminal (5), wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) being configured to allow said signal transmission unit (46) to send the electrical current decreasing signal to said charging circuit (51), said electrical current decreasing signal including an instruction of decreasing the electrical current supplied to the electrical vehicle (50), whereby the electrical current being supplied to the electrical vehicle (50) is limited. 12. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 11, wherein when the measured electrical current value of the main electrical current exceeds the first threshold value (Th1) over a first period of time, said control means is configured to limit the electrical power supplied to the electrical vehicle (50). 13. The electrical power feeding system as claimed in claim 12, wherein the predetermined period of time is set to be longer than the first period of time. 14. The electrical power feeding system as claimed in any one of claims 1 to 13, wherein the second threshold value (Th2) is set to be equal to or more than the amperage rating. 15. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 14, wherein said third threshold value (Th3) is set to be lower than the amperage rating.

16. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 14, wherein when the measured electrical current value becomes lower than a third threshold value (Th3) which is lower than the first threshold value (Th1) over a certain period of time under the condition where the electrical power feeding unit for vehicle (4) stops supplying the electrical power to the electrical vehicle (50), the control means being configured to generate an electrical power feeding limitation cancellation signal, the electrical power feeding limitation cancellation signal including an instruction of a cancellation of limiting the electrical power supplied to the electrical vehicle (50), wherein said electrical power feeding unit for vehicle (4) is configured to make a cancellation of limiting the electrical power which is supplied to the electrical vehicle (50) on the basis of the electrical power feeding limitation cancellation signal. 17. The electrical power feeding system as claimed in claim 16, wherein said third threshold value (Th3) is set to be lower than the amperage rating. 18. The electrical power feeding system as claimed in any one of claims 1 to 17, wherein when said control means generates the electrical power feeding limitation signal, the electrical power feeding unit for vehicle (4) limits the electrical current supplied to the electrical vehicle (50) such that the main electrical current becomes lower than the amperage rating. 19. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 18, wherein said control means is a control unit (44) disposed within said electrical power feeding unit for vehicle (4). 20. The electrical power feeding system for vehicle as claimed in any one of claims 1 to 19, wherein

said control means is a control device (3). 21. The electrical power feeding system for vehicle being configured to supply the electrical power to a first electrical equipment and a second electrical equipment, said electrical power feeding system for vehicle as claimed in claim 1, wherein said control means is configured to determine a priority order of the first electrical equipment as a first-order priority, said control means is configured to determine a priority order of the second electrical equipment as a second-order priority, said control means is configured to determine a priority order of the electrical vehicle (50) as a third-order priority, the third-order priority is lower than the second-order priority, the second-order priority is lower than the first-order priority, wherein when said control means generates the electrical power feeding limitation signal, said electrical power feeding unit for vehicle (4) is configured to limit the electrical current supplied to the electrical vehicle (50) having the third-order priority, wherein when said electrical power feeding unit for vehicle (4) limits the electrical current supplied to the electrical vehicle (50), said control means is configured to recognize the first limitation condition, wherein when the control means generates the electrical power feeding limitation signal under the first limitation condition, the electrical power feeding unit for vehicle (4) limits the electrical power supplied to the second electrical equipment having the second-order priority. 22. The electrical power feeding system for vehicle being configured to supply electrical power to a plurality of electrical equipments, said electrical power feeding system for vehicle as claimed in claim 1, wherein said control means is configured to determine a priority order of each one of the electrical equipments,

said control means is configured to determine a priority order of the electrical vehicle (50) as a lowest-order priority among the electrical vehicle (50) and the electrical equipments, wherein when said control means generates the electrical power feeding limitation signal, the electrical power feeding unit for vehicle (4) is configured to limit the electrical power which is supplied to the electrical vehicle (50) having the lowest-order priority, wherein when said electrical power feeding unit for vehicle (4) limits the electrical power which is supplied to the electrical vehicle (50) having the lowest-order priority, said control means is configured to recognize a first limitation condition, wherein when said control means generates the electrical power feeding limitation signal under the first limitation condition, the electrical power feeding unit for vehicle (4) is configured to limit the electrical power which is supplied to the electrical equipment in the order of the electrical equipment having the lowest-order priority to the electrical equipment having a highest-order priority among a plurality of the electrical equipment.