Life safety device with extended shelf life

A technology for life safety devices and batteries, applied in circuit devices, battery circuit devices, safety/protection circuits, etc., can solve the problems of device shelf life, inconvenient removal of products, and cost, and achieve the purpose of extending shelf life. Effect

Inactive Publication Date: 2011-11-23
WALTER KIDDE PORTABLE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] While overcurrent protection reduces the amount of current drawn from the battery prior to installation, limited device shelf life remains an issue
It is inconvenient and costly to remove products from stores due to expired shelf life of battery packs

Method used

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  • Life safety device with extended shelf life
  • Life safety device with extended shelf life
  • Life safety device with extended shelf life

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] figure 1 Shown is a block diagram of a built-in life safety device 10, which may be, for example, a smoke alarm, a carbon monoxide (CO) alarm, a combination smoke and CO alarm, or the like for alarming a residence or other building A device that provides occupants with warning of potentially life-threatening conditions. The flush-mounted life safety device 10 is typically mounted on a wall or ceiling and connected to an alternating current (AC) power source.

[0013] as in figure 1 As shown in , the life safety device includes a low voltage supply (voltage supply) 12, a battery assembly 14 (which includes a rechargeable battery 16, a battery charging circuit 18, a booster circuit 20 and a battery protection circuit 22), regulator electronics Device 24 , hazard detector 26 , microcontroller unit (MCU) 28 , sounder circuit 30 and battery test electronics 32 .

[0014] A low voltage supply 12 is connected to the AC mains input, as represented by a line input L and a neu...

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PUM

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Abstract

A life safety device includes a battery assembly with a rechargeable battery. Extended shelf life is achieved by annually initiating an over-discharge protection mode in which a battery protection circuit prevents current flow from the battery. The life safety device remains in the over-discharge protection mode until the device is connected to a charging power source at the time of installation. The battery assembly then exits the protection mode and enters its normal mode of operation.

Description

technical field [0001] The invention relates to a life safety device having a battery pack with a rechargeable battery. Background technique [0002] Flush mount life safety devices are used in residential and commercial buildings to provide warnings to occupants of hazards such as fire or the buildup of unsafe gases such as carbon monoxide. Life safety devices are usually mounted on the walls or ceilings of buildings. Typically, built-in life safety devices are powered by battery packs that include rechargeable batteries. The life safety device is connected to an AC power source that provides current for charging the rechargeable battery. [0003] A rechargeable battery is part of a battery pack that is installed in a life safety device at the factory. Once the battery pack is connected to the circuitry of the life safety device, power can be drawn from the battery prior to putting the device into service. Under those conditions, the life safety device is not connected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44H02H7/18
CPCH02J7/0031H01M10/448H01M10/48Y02E60/12H02J7/00306Y02E60/10
Inventor M.J.布赫霍尔茨T.西尔弗
Owner WALTER KIDDE PORTABLE EQUIP
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