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Method and System for Increasing Shelf Life of Rechargeable Batteries Using Integrated Energy Storage Units

IP.com Disclosure Number: IPCOM000248081D
Publication Date: 2016-Oct-24
Document File: 2 page(s) / 64K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system is disclosed for increasing shelf life of rechargeable batteries and to prevent a rechargeable battery from permanently shutting down due to excessive voltage drop by physically and electrically connecting integrated energy storage units to the rechargeable batteries. The integrated energy storage units are electrically connected to the rechargeable batteries only when maintaining minimum levels of capacity for the rechargeable batteries.

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Method and System for Increasing Shelf Life of Rechargeable Batteries Using Integrated Energy Storage Units

Disclosed is a method and system for increasing shelf life of rechargeable batteries by physically and electrically connecting integrated energy storage units to the rechargeable batteries. An integrated energy storage unit can be, but need not be limited to, an integrated power source such as a supercapacitor and another primary or rechargeable battery.

The integrated energy storage units are electrically connected to the rechargeable batteries only when maintaining minimum levels of capacity for the rechargeable batteries. For example, in the case of a lithium ion battery, an integrated power source is used other than a lithium ion chemistry in order to avoid the maximum 30% State of Charge (SoC) limit for air shipments. The integrated power source only recharges the battery and never provides power or a power assist to the rechargeable battery.

Also, a dedicated energy source is used to maintain a given capacity of a rechargeable battery.

The figure below illustrates an Integrated Energy Storage (IES) rechargeable battery pack of the method and system.

Figure

As illustrated in the figure, the IES battery pack includes one or more rechargeable batteries that are the only source to provide power to an external device or equipment. Further, the IES battery pack includes an Integrated Energy Storage Unit (IESU) that does not provide any power to an external device or equipment. The IESU can be, but

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need not be limited to, a supercapacitor, a rechargeable battery such as, but not limited to, a Lithium ion battery, a Nickel-metal hydride (NiMH) battery, a lead acid battery. The IESU trickle charges the one or more rechargeable batteries inside the IES battery pack to maintain the shelf life of the batteries.

Also, the IES battery pack includes current limiting/control circuits that determine an amount of charge between the IESU and the one or more rechargeable batteries. The current limiting/control circuits include, but need not be limited to, resistors, fuse...