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Maximized & Optimized Energy Delivery

IP.com Disclosure Number: IPCOM000016155D
Original Publication Date: 2002-Sep-23
Included in the Prior Art Database: 2003-Jun-21
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Abstract

Maximized Optimized Energy Delivery Proposed is a parallel storage architecture that will extract the most energy out of a battery storage system and deliver the peak power requirements that would normally decrease the efficiency of the system. Peak power or high current delivered directly from the battery is at a lower efficiency than that of the same energy delivered at a slower rate.

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Maximized & Optimized Energy Delivery

Proposed is a parallel storage architecture that will extract the most energy out of a battery storage system and deliver the peak power requirements that would normally decrease the efficiency of the system. Peak power or high current delivered directly from the battery is at a lower efficiency than that of the same energy delivered at a slower rate.

Architecture Diagram:

Two main aspects are featured with this configuration. The first is the parallel delivery of energy from a multiple of storage cells allowing the full pack energy to be extracted and not limited by the lowest capacity cell in a series string. This may in some cases require a buck-boost circuit to bring the operating voltage up to the desired value. The second is the addition of a peak power element to maintain higher delivery efficiency from a lower rate of discharge from the battery.

Below is empirical data reflecting the benefit of the parallel architecture benefits:

Actual Individual Battery Capacity (AH)

1 32

2 27

3 26

4 24

5 22

6 20

7 16

8 14

9 13

194

Cumulative energy or capacity from the parallel architecture is the sum of all the energy from each battery/cell.

The same set of batteries when operated in a series configuration is limited by the lowest capacity cell in the string. In this case the lowest capacity cell is 13 (AH) thus all

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9 batteries are limited to 13. 13 * 9 = 117...