Abstract: Provided are a control circuit (100), a circuit board assembly, and a battery (200) parallel system. The control circuit (100) is disposed between a battery (200) and a busbar (300), and the control circuit (100) comprises an acquisition unit (1), a control unit (2), and a current-limiting circuit (3). The control unit (2) is used to start timing when the current of a positive electrode of the battery (200) is greater than a preset threshold, and after the duration of the voltage of the positive electrode of the battery (200) greater than a first preset threshold is greater than a preset time, reduces the current of the positive electrode of the battery (200) by means of controlling the current-limiting circuit (3), until the current of the positive electrode of the battery (200) is less than or equal to the preset threshold.

Abstract: A circuit for a paralleled power supply module to implement automatic current-sharing in proportion comprises: at least two power supply modules, and an output current feedback loop and an output voltage adjusting loop corresponding to each power supply module. Wherein, the output current feedback loop comprises an output current sample amplifying unit, configured to collect output current of a power supply module and amplify the collected output current into a voltage signal according to an inverse proportion of the output proportion set for each power supply module, and a current-sharing controller unit configured to adjust an output voltage of each power supply module; and the output voltage adjusting loop is configured to compare the output voltage of the current-sharing controller unit with a reference voltage, and control the output voltage of the power supply module to adjust the output current.

Abstract: A circuit for a paralleled power supply module to implement automatic current-sharing in proportion comprises: at least two power supply modules, and an output current feedback loop and an output voltage adjusting loop corresponding to each power supply module. Wherein, the output current feedback loop comprises an output current sample amplifying unit, configured to collect output current of a power supply module and amplify the collected output current into a voltage signal according to an inverse proportion of the output proportion set for each power supply module, and a current-sharing controller unit configured to adjust an output voltage of each power supply module; and the output voltage adjusting loop is configured to compare the output voltage of the current-sharing controller unit with a reference voltage, and control the output voltage of the power supply module to adjust the output current.