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Battery pack unit testing method and testing apparatus

  • US 10,641,832 B2
  • Filed: 09/14/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 09/15/2015
  • Status: Active Grant
First Claim
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1. A battery pack unit testing method for a battery pack unit, the battery pack unit comprising:

  • a battery pack including a plurality of cells electrically connected to each other;

    a plurality of thermometers, wherein each one of the thermometers is attached to each one of the plurality of cells of the battery pack, respectively; and

    a duct assembly through which a coolant is supplied to the cells of the battery pack,the battery pack unit testing method comprising;

    a) charging the battery pack while supplying the coolant to the duct assembly at a time between completion of assembly of the battery pack unit and shipment of the battery pack unit;

    b) acquiring, by the thermometers, temperature information of each of the cells at predetermined time intervals during charging of the battery pack while supplying the coolant to the duct assembly;

    c1) amongst all of the cells of the battery pack, determining a highest temperature information and a lowest temperature information measured at the same time on the basis of the temperature information acquired during charging of the battery pack while supplying the coolant to the duct assembly;

    c2) calculating a difference between the highest temperature information and the lowest temperature information amongst all of the cells;

    c3) determining whether the difference is equal to or greater than a predetermined reference temperature difference; and

    c4) based upon the difference being equal to or greater than the predetermined reference temperature difference, determining that the duct assembly has a malfunction.

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