Charging control system and short-circuit current protecting method thereof

Patent metadata

Field	Value
Publication number	US-2018342882-A1
Application number	US-201815973967-A
Country	US
Kind code	A1
Filing date	May 8, 2018
Priority date	May 23, 2017
Publication date	Nov 29, 2018
Grant date	—

Abstract

A short-circuit current protecting method of a charging control system is cooperating with at least a control unit and a plurality of power outlet electrically connected to an electronic switch. The control unit controls the mode of the electronic switches with turn on or off. The short-circuit current protecting method includes the following steps. Step 1 is detecting at least a current signal value of an AC power. Step 2 is determining whether the current signal value is grater than a predetermine current threshold. Step 3 is enabling a short-circuit current analyzing module if the current signal value is grater than the predetermine current threshold. Step 4 is turning off at least one of the electronic switches if the short-circuit current is determined by the short-circuit current analyzing module.

First claim

What is claimed is:

1 . A short-circuit current protecting method of a charging control system, which is cooperating with at least a control unit and a plurality of power outlet electrically connected to an electronic switch, wherein the control unit controls the mode of the electronic switches with turn on or off, comprising the following steps:
detecting at least a current signal value of an AC power; determining whether the current signal value is greater than a predetermined current threshold; enabling a short-circuit current analyzing module if the current signal value is greater than the predetermined current threshold; and turning off at least one of the electronic switches if the short-circuit state is determined by the short-circuit current analyzing module.

2 . The short-circuit current protecting method of claim 1 , the short-circuit current analyzing module executes the following step in two duty cycles:
capturing a plurality of current signal value of AC power based on a capturing times value; recording the current signal value in a form array; comparing the predetermined current threshold with the current signal value in the form array in order after the record is completed; counting the number of the current signal value greater than the predetermined current threshold and recording as a short-circuit count value; and determining the short-circuit state when the short-circuit count value is greater than a short-circuit count threshold.

3 . The short-circuit current protecting method of claim 2 , the short-circuit current analyzing module is tripped when the short-circuit count value is less than the short-circuit count threshold.

4 . The short-circuit current protecting method of claim 1 , the short-circuit current analyzing module will executes the following step in two duty cycles:
capturing the current signal value of AC power; determining whether the current signal value is greater than a predetermined current threshold; determining whether a short-circuit count value is greater than a short-circuit count threshold when the current signal value is greater than the predetermined current threshold; and determining the short-circuit state when the short-circuit count value is greater than a short-circuit count threshold.

5 . The short-circuit current protecting method of claim 4 , further comprising:
determining whether a capturing times value is greater than a predetermined capturing times value when the current signal value is less than the predetermined current threshold; capturing the current signal value again when the capturing times value is less than the predetermined capturing times value; and tripping the short-circuit current analyzing module when the capturing times value is greater than the predetermined capturing times value.

6 . The short-circuit current protecting method of claim 4 , further comprising:
determining whether a capturing times value is greater than a predetermined capturing times value when the current signal value is less than the predetermined current threshold; capturing the current signal value again when the capturing times value is less than the predetermined capturing times value; and tripping the short-circuit current analyzing module when the capturing times value is greater than the predetermined capturing times value.

7 . The short-circuit current protecting method of claim 1 , when the short-circuit state is determined by the short-circuit current analyzing module, further comprising:
triggering an audible unit, a light-emitting unit or a display unit; and storing and recording the information of the short-circuit state.

8 . A charging control system, comprising:
a power converting unit, which has an input end receiving an AC power and an output end outputting a DC power; a control unit, which is electrically connected to the output end of the power converting unit to receive the DC power and output a set of switch signal; an electronic switch unit, which has a plurality of electronic switches; a drive unit, which is electrically connected to the control unit and the electronic switch unit separately, and receives the switch signal to control the action of the electronic switch unit; a transmission unit, which is electrically connected to the input end of the power converting unit and the electronic switch unit, and transmits the AC power to the electronic switch unit; and a feedback unit is respectively electrically connected to the transmission unit and the control unit, and generates a current signal value to the control unit based on the AC power; wherein the control unit will determine whether the current signal value is greater than a predetermined current threshold, a short-circuit current analyzing module of the control unit will be enabled if the current signal value is greater than the predetermined current threshold, besides, at least one of the electronic switches will be turned off if the short-circuit state is determined by the short-circuit current analyzing module.

9 . The charging control system of claim 8 , after the short-circuit current analyzing module is enabled, the control unit is to record a plurality of current signal value captured by the feedback unit in a form array, compare a predetermined current threshold with the current signal value in the form array in order, count the number of the current signal value greater than the predetermined current threshold and record as a short-circuit count value; the short-circuit state is determined when the short-circuit count value is greater than a short-circuit count threshold.

10 . The charging control system of claim 9 , the short-circuit current analyzing module is turned off if the short-circuit count value is less than the short-circuit count threshold.

11 . The charging control system of claim 8 , after the short-circuit current analyzing module is enabled, the control unit is to determine whether the current signal value captured by the feedback unit is greater than the predetermined current threshold, if the current signal value is greater than the predetermined current threshold, the control unit will determine whether a short-circuit count value is greater than a short-circuit count threshold, the short-circuit state is determined when the short-circuit count value is greater than a short-circuit count threshold.

12 . The charging control system of claim 11 , further comprising:
determining whether a capturing times value is greater than a predetermined capturing times value by the control unit if the current signal value is less than the predetermined current threshold; capturing the current signal value again by the feedback unit if the capturing times value is less than the predetermined capturing times value; and turning off the short-circuit current analyzing module if the capturing times value is greater than the predetermined capturing times value.

13 . The charging control system of claim 11 , further comprising:
determining whether a capturing times value is greater than a predetermined capturing times value by the control unit when the short-circuit count value is less than the short-circuit count threshold; capturing the current signal value again by the feedback unit if the capturing times value is less than the predetermined capturing times value; and turning off the short-circuit current analyzing module if the capturing times value is greater than the predetermined capturing times value.

14 . The charging control system of claim 8 , further comprises an audible unit, a light-emitting unit or a display unit, which

Assignees

• Aver Information Inc

Inventors

• Hsu Chi-Fa
• Chang Chao-Hung
• Chou Lien-Kai
• Yu Cheng-Cheng

Classifications

• H02J7/04

  Regulation of charging current or voltage · CPC title

• H02J7/953

  in response to charge current gradient · CPC title

• H02J7/62 Primary

  against overcurrent · CPC title

• H02J7/0026 Primary

  Electricity · mapped topic

• H02J7/0083

  Electricity · mapped topic