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Hybrid battery system

  • US 9,979,053 B2
  • Filed: 12/05/2012
  • Issued: 05/22/2018
  • Est. Priority Date: 12/15/2011
  • Status: Active Grant
First Claim
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1. A hybrid, rechargeable battery system comprising:

  • a high power battery and a high energy density battery, where the high energy density battery has an energy density greater than the high power battery and a peak power density less than the high power battery, wherein the energy density of said high energy density battery is at least 250 WH/kg and wherein the peak power density of said high power battery is at least 5 KW/kg as measured when said high power battery is discharged from a fully charged state to 2 volts over 5 seconds, wherein the high power battery and the high energy density battery are connected in a parallel electrical relationship, and wherein an open circuit voltage of said high energy density battery is greater than an open circuit voltage of said high power battery up to at least an 80% degree of discharge.

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