Photovoltaic module

  • US 10,931,119 B2
  • Filed: 01/10/2013
  • Issued: 02/23/2021
  • Est. Priority Date: 01/11/2012
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a first node, a second node, and a third node, wherein the second node is coupled between the first node and the third node, wherein the first node and the third node are coupled to a series string of photovoltaic cells;

    a first switch coupled between the first node and the second node and a second switch coupled between the second node and the third node, wherein the first switch and the second switch are operated to be open or closed together;

    a controller coupled to the second node, wherein the controller is operative to control the first switch and the second switch to be open or closed; and

    a charging circuit connected between the second node and the third node, comprising a charge storage device, wherein a charging circuit is configured to provide a bypass to the series string,wherein, during a first time period, the first switch and the second switch are open and the charge storage device is charged by current flowing through the series string, creating a voltage differential between the third node and the second node, and the charge storage device is disconnected from the second node, andwherein, during a second time period, after the voltage differential is above a threshold, the controller controls the first switch and the second switch to close, creating a bypass between the first node and the third node, and the charge storage device discharges, providing power to the controller.

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