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Battery pack

  • US 8,604,749 B2
  • Filed: 12/20/2010
  • Issued: 12/10/2013
  • Est. Priority Date: 05/13/2010
  • Status: Active Grant
First Claim
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1. A battery pack comprising:

  • a plurality of batteries;

    a circuit unit for controlling charging and discharging of the batteries;

    a case containing the batteries and the circuit unit, the case comprising an assembly of at least two sub-cases that directly contact each other at respective coupling surfaces; and

    a submersion checking unit between the at least two sub-cases and on at least one of the coupling surfaces.

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