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Battery device

  • US 9,941,717 B2
  • Filed: 04/26/2016
  • Issued: 04/10/2018
  • Est. Priority Date: 04/30/2015
  • Status: Active Grant
First Claim
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1. A battery device, comprising:

  • a secondary battery having positive and negative electrodes;

    positive and negative terminals connected, respectively, to the positive and negative electrodes of the secondary battery;

    a switching line connecting between the positive electrode of the secondary battery and the positive terminal or between the negative electrode of the secondary battery and the negative terminal;

    a first charge/discharge control device and a second charge/discharge control device both connected to the secondary battery in parallel to the second battery between the positive and negative electrodes of the secondary battery, wherein the first charge/discharge control device comprises a first overcurrent detection terminal for monitoring a charge/discharge current flowing through the secondary battery, and the second charge/discharge control device comprises a second overcurrent detection terminal for monitoring the charge/discharge current;

    first and second charge/discharge control switches connected in series in the switching line, wherein the first charge/discharge control switch is turned off by the first charge/discharge control device to cut the switching line, and the second charge/discharge switch is turned off by the second charge/disgorge control device to cut the switching line; and

    a current sensing resistor connected in the switching line upstream of the first charge/discharge control switch, whereinthe first overcurrent detection terminal of the first charge/discharge control device is connected to the switching line between a downstream end of the current sensing resistor and the first charge/discharge control switch so that the first charge/discharge control device monitors a voltage across the current sensing register to thereby monitor the charge/discharge current flowing through the secondary battery, andthe second overcurrent detection terminal of the second charge/discharge control device is connected to the switching line downstream of the second charge/discharge control switch so that the second charge/discharge control device monitors a voltage across the second charge/discharge control switch to thereby monitor the charge/discharge current flowing through the secondary battery.

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