×

Energy storage device and method for operating it

  • US 10,008,865 B2
  • Filed: 10/11/2013
  • Issued: 06/26/2018
  • Est. Priority Date: 10/19/2012
  • Status: Active Grant
First Claim
Patent Images

1. Energy storage arrangement, comprising:

  • at least one high-current rechargeable battery cell and at least one high-energy rechargeable battery cell, with the at least one high-energy rechargeable battery cell and the at least one high-current rechargeable battery cell being connected in parallel,with the rechargeable battery cells being charged and/or discharged with current pulses,wherein inter-pulse periods are arranged between said current pulses, andwherein said at least one high-energy rechargeable battery cell is configured to recharge said at least one high-current rechargeable battery cell during rest periods after a load requirement needing a high current,a control unit to control the pulse lengths and/or pulse amplitudes of the current pulse for charging and/or discharging of the rechargeable battery cells,wherein, during charging, by using adaptive current pulses, charge balancing takes place systematically between the two rechargeable cell types during the inter-pulse periods as the high-energy rechargeable battery cell works as a load for the high-current rechargeable battery cell during the inter-pulse periods,wherein the control unit being connected to a first switch unit, a second switch unit, a third switch unit and/or a fourth switch unit that couples the at least one high current rechargeable battery cell and the at least one high-energy rechargeable battery cell, in order to supply a switch pulse to the latter to open and/or close the respective switch unit, with the switch unit continuing to be connected to the current, voltage and/or temperature measuring devices in order to receive measuring signals from the latter,wherein by means of closing of the fourth switch unit during the inter-pulse periods the at least one high-current rechargeable battery cell being discharged by a load pulse.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×