Method and system for short-circuit protection of emergency starting power supply

A system for short-circuit protection of emergency starting power supply, wherein the short-circuit protection system is disposed in a circuit between a storage battery and a connection port in the emergency starting power supply, and the short-circuit protection system comprises a short circuit detection module;

• and the short-circuit protection system comprises:
• a data acquisition unit used for continuously measuring voltage parameters or current parameters of the emergency starting power supply at a preset frequency A;
• a data comparison unit used for determining whether the operation of the emergency starting power supply is abnormal according to change difference and change direction of the voltage or current parameters measured at two consecutive times;
• the data comparison unit is used for identifying whether a change in the voltage parameters measured at two consecutive times falls within a preset range C, and the data comparison unit used for identifying whether the change direction of the voltage parameters is rising or reducing;
• when a change in the voltage parameters measured at two consecutive times falls within a preset range C, or the change in the voltage parameters measured at two consecutive times exceeds the preset range C and the voltage parameters are reducing, it is determined an abnormality occurs, in which case, a counting unit counts the abnormality determination;
• or
• the data acquisition unit used for acquiring the current parameters, the data comparison unit is used for identifying whether a change in the current parameters measured at two consecutive times falls within a preset range C, and the data comparison unit used for identifying whether the change direction of the current parameters is rising or reducing;
• when a change in the current parameters measured at two consecutive times falls within a preset range C, or the change in the current parameters measured at two consecutive times exceed the preset range C and the current parameters are rising, it is determined an abnormality occurs, in which case, the counting unit counts the abnormality determination;
• a counting unit used for counting the abnormality determination;
• and
• a short circuit determination unit, when a count of continuous abnormality determination reaches a preset number of times B, it is determined that the emergency starting power supply is short-circuited, and a control device is driven to cut off the communication between the storage battery and the connection port;
• when the count of continuous abnormality determination does not exceed the preset number of times B, it is determined that the emergency starting power supply is in a normal state, and count of the counting unit is driven to be cleared and recorded again;
• a state-of-charging exclusion unit used for:
• recording the voltage parameters or current parameters as the normal electrical parameters when the count is cleared;
• when the count of consecutive normality determination reaches the preset number of times B, identifying the difference between the current voltage parameters or current parameters and the last recorded normal electrical parameters;
• under the condition that the difference falls within a first preset value D, performing the short-circuit detection step again;
• under the condition that the difference exceeds the first preset value D, it is determined that the emergency starting power supply is short-circuited and the circuit is disconnected.