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Battery pack, battery charging station, and charging method

  • US 9,783,020 B2
  • Filed: 12/14/2015
  • Issued: 10/10/2017
  • Est. Priority Date: 03/16/2015
  • Status: Active Grant
First Claim
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1. A battery pack for an electric vehicle, comprising:

  • a battery comprising a plurality of battery modules connected in series;

    a battery charging system, comprising;

    a first charging circuit connecting the plurality of battery modules in series, the first charging circuit configured to charge the plurality of battery modules in series to a first preset voltage;

    the battery modules including a first battery module and a second battery module;

    a plurality of second charging circuits, wherein each of the plurality of second charging circuits is connected to a corresponding multiple ones of the plurality of battery modules, and wherein each of the plurality of second charging circuits is configured to charge the corresponding battery module, the plurality of second charging circuits including a second charging circuit connected to the first battery module and the second battery module; and

    a battery detecting system configured to selectively and independently charge the plurality of battery modules, the selectively and independently charging the plurality of the battery modules comprises;

    charging the plurality of the battery modules to the first preset voltage through the first charging circuit such that when the plurality of the battery modules are being charged through the first charging circuit, the second charging circuits are switched off;

    detecting whether the plurality of battery modules have been charged to the first preset voltage through the first charging circuit;

    when it is detected that the plurality of battery modules have been charged to the first preset voltage through the first charging circuit, switching off the first charging circuit and, switching on a second circuit connected to the first and second battery modules and charging the first battery module to the second preset voltage through the second charging circuit connected to the first and second battery modules; and

    detecting whether the first battery module has been charged to the second preset voltage through the second charging circuit connected to the first and second battery modules.

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