Browse Prior Art Database

Expandable Battery System

IP.com Disclosure Number: IPCOM000105646D
Original Publication Date: 1993-Aug-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 4 page(s) / 87K

Publishing Venue

IBM

Related People

Mito, T: AUTHOR [+2]

Abstract

Disclosed is a new expandable battery system with three batteries, i.e., a small battery, a regular size battery and a large battery. A user can charge/discharge these batteries without using any special charger because these batteries have compatibility for their charging and remaining capacity indication. A developer for a load system can also support the expanded battery (large battery) without changing the load system. The large battery may have any size and any form because it connects with the load system only via the connector in the small battery pack.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Expandable Battery System

      Disclosed is a new expandable battery system with three
batteries, i.e., a small battery, a regular size battery and a large
battery.  A user can charge/discharge these batteries without using
any special charger because these batteries have compatibility for
their charging and remaining capacity indication.  A developer for a
load system can also support the expanded battery (large battery)
without changing the load system.  The large battery may have any
size and any form because it connects with the load system only via
the connector in the small battery pack.

This invention is composed of the following four items:

o   a load system such as a notebook PC system unit (including AC/DC
    adapter for the charge)
o   a regular size (normal) battery pack

o   a small battery pack with the connector for a large battery pack
o   a large battery pack

      The load system unit may charge the batteries and indicate the
remaining capacity in response to the temperature, the voltage and
the current in the batteries.

      In Fig. 1, the normal battery pack connects with the system at
the the plus terminal(+), the minus terminal(-) and the temperature
terminal(T).  The normal battery is composed of the 9 series 4/5A
NiCd(or NiMH) cells.

      In Fig. 2, the small battery pack has the same size and the
same connection to the system with the normal battery pack.

      However, this pack has the connector for the large battery pack
and the change switch.  This switch connects the large battery pack
terminals to the system and disconnects the small battery pack
terminals from the system when the large battery pack is attached to
the small batt...