Troubleshooting method and apparatus for power supply device

Abstract

Embodiments of the present invention disclose a troubleshooting method and device. The method is applicable to an inverter power supply system in the power supply device. The inverter power supply system includes at least two DC/DC modules, and any one of the DC/DC modules includes fuses F1 and F2, relays K1 and K2, inductors L1 and L2, switch modules Q1, Q2, and Q3, and direct current bus capacitors C1 and C2. The troubleshooting method includes: if it is detected that any one of the DC/DC modules is faulty, determining a faulty component in the faulty module; and if the faulty component is a C1 or a C2, and the inverter power supply system is in a battery discharging mode, turning on a Q2 in the faulty module, so that an F1 and an F2 of the faulty module are blown, to disconnect the faulty module from another DC/DC module.

1 . A troubleshooting method performed by an inverter power supply system in a power supply device, the inverter power supply system comprising at least two direct current to direct current (DC/DC) power supply modules connected in parallel to a battery and supplying power to a load by using a direct current to alternating current (DC/AC) power supply, and each of the at least two DC/DC modules comprising fuses F 1  and F 2 , relays K 1  and K 2 , inductors L 1  and L 2 , switch modules Q 1 , Q 2 , and Q 3 , and DC bus capacitors C 1  and C 2 ;
 wherein one terminal of the K 1  is connected to a positive terminal of the battery via the F 1 , one terminal of the K 2  is connected to a negative terminal of the battery via the F 2 , the other terminal of the K 1  is connected to connection terminals of the Q 1  and the Q 2  via the L 1 , the other terminal of the K 2  is connected to connection terminals of the Q 2  and the Q 3  via the L 2 , one terminal of the Q 1  is connected to one terminal of the C 1 , the other terminal of the Q 1  is connected to one terminal of the Q 2 , the other terminal of the Q 2  is connected to one terminal of the Q 3 , the other terminal of the C 1  is connected to the other terminal of the Q 3  by using the C 2 , the troubleshooting method comprising: 
 in response to detecting any one of the at least two DC/DC modules is faulty, determining a faulty component in the faulty module; and 
 in response to determining that the faulty component is a C 1  or a C 2 , and the inverter power supply system is in a battery discharging mode, turning on a Q 2  in the faulty module, so that an F 1  and an F 2  of the faulty module are blown to disconnect the faulty module from another DC/DC module. 
 
     
     
         2 . The troubleshooting method according to  claim 1 , further comprising:
 if a short circuit component is the C 1  or the C 2 , and the inverter power supply system is in a battery charging mode, turning off a Q 1  and a Q 3  of the faulty module, and turning on the Q 2  of the faulty module after a preset time interval, so that the F 1  and the F 2  of the faulty module are blown to disconnect the faulty module from the another DC/DC module.   
     
     
         3 . The troubleshooting method according to  claim 1 , wherein the determining a faulty component in the faulty module comprises:
 when the Q 2  and the Q 1  of the faulty module are in an off state, turning on a Q 3  of the faulty module and detecting a current state of an L 1  and an L 2  of the faulty module, and if it is detected that there is a current both in the L 1  and the L 2  of the faulty module, determining that the Q 1  of the faulty module is short-circuited; or   when the Q 2  and the Q 3  of the faulty module are in an off state, turning on a Q 1  of the faulty module and detecting a current state of an L 1  and an L 2  of the faulty module, and if it is detected that there is a current both in the L 1  and the L 2  of the faulty module, determining that the Q 3  of the faulty module is short-circuited.   
     
     
         4 . The troubleshooting method according to  claim 3 , further comprising:
 if a short circuit component in the faulty module is the Q 1  or the Q 3 , turning on the Q 2  of the faulty module, so that the F 1  and the F 2  of the faulty module are blown to disconnect the faulty module from the another DC/DC module.   
     
     
         5 . The troubleshooting method according to  claim 3 , further comprising:
 if a short circuit component in the faulty module is the Q 1  or the Q 3 , turning off any one or more of a K 1 , a K 2 , the Q 1 , the Q 2 , or the Q 3  of the faulty module, to disconnect a parallel connection between the faulty module and the another DC/DC module.   
     
     
         6 . A power supply device, comprising:
 an inverter power supply system comprising at least two DC/DC modules connected in parallel to a battery and supplying power to a load by using a direct current to alternating current (DC/AC) power supply, and each of the at least two DC/DC modules comprising fuses F 1  and F 2 , relays K 1  and K 2 , inductors L 1  and L 2 , switch modules Q 1 , Q 2 , and Q 3 , and DC bus capacitors C 1  and C 2 ;   wherein one terminal of the K 1  is connected to a positive terminal of a battery via the F 1 , one terminal of the K 2  is connected to a negative terminal of the battery via the F 2 , the other terminal of the K 1  is connected to connection terminals of the Q 1  and the Q 2  via the L 1 , the other terminal of the K 2  is connected to connection terminals of the Q 2  and the Q 3  via the L 2 , one terminal of the Q 1  is connected to one terminal of the C 1 , the other terminal of the Q 1  is connected to one terminal of the Q 2 , the other terminal of the Q 2  is connected to one terminal of the Q 3 , the other terminal of the C 1  is connected to the other terminal of the Q 3  by using the C 2 , and   wherein each of the at least two DC/DC modules of the power supply device comprises:   a detection unit configured to detect a voltage signal and/or a current signal in any one of the DC/DC modules, determine, based on the detected voltage signal and/or the detected current signal, whether the any one of the DC/DC modules is faulty, and when detecting that the any one of the DC/DC modules is faulty, detect a faulty component in the faulty module; and   a control unit configured to, when the detection unit detects that the faulty component in the faulty module is a C 1  or a C 2 , and the inverter power supply system is in a battery discharging mode, turn on a Q 2  of the faulty module, wherein an F 1  and an F 2  of the faulty module are blown to disconnect the faulty module from another DC/DC module.   
     
     
         7 . The power supply device according to  claim 6 , wherein the control unit is further configured to:
 when the detection unit detects that the faulty component in the faulty module is the C 1  or the C 2 , and the inverter power supply system is in a battery charging mode, turn off a Q 1  and a Q 3  of the faulty module, and turn on the Q 2  of the faulty module after a preset time interval, so that the F 1  and the F 2  of the faulty module are blown to disconnect the faulty module from the another DC/DC module.   
     
     
         8 . The power supply device according to  claim 6 , wherein the detection unit is further configured to:
 when the Q 2  and the Q 1  of the faulty module are in an off state, turn on a Q 3  of the faulty module and detect a current state of an L 1  and an L 2  of the faulty module, and if it is detected that there is a current both in the L 1  and the L 2  of the faulty module, determine that the Q 1  of the faulty module is short-circuited; or   when the Q 2  and the Q 3  of the faulty module are in an off state, turn on a Q 1  of the faulty module and detect a current state of an L 1  and an L 2  of the faulty module, and if it is detected that there is a current both in the L 1  and the L 2  of the faulty module, determine that the Q 3  of the faulty module is short-circuited.   
     
     
         9 . The power supply device according to  claim 8 , wherein the control unit is further configured to:
 when the detection unit detects that the short circuit component in the faulty module is the Q 1  or the Q 3 , turn on the Q 2  of the faulty module, so that the F 1  and the F 2  of the faulty module are blown to disconnect the faulty module from the another DC/DC module.   
     
     
         10 . The power supply device according to  claim 8 , wherein the control unit is further configured to:
 when the detection unit detects that the short circuit component in the faulty module is the Q 1  or the Q 3 , turn off any one or more of a K 1 , a K 2 , the Q 1 , the Q 2 , or the Q 3  of the faulty module, to disconnect a parallel connection between the faulty module and the another DC/DC module.