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Life safety device with automatic battery discharge at the end of life

A life safety device, end-of-life technology, applied in battery circuit devices, circuit devices, different battery charging and other directions, can solve the problems of life safety device battery waste, dependence and other issues

Inactive Publication Date: 2014-01-01
WALTER KIDDE PORTABLE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using a switch to discharge the battery is that it relies on the user to actuate the switch
If the user does not actuate the switch, the life safety device and its battery may be discarded under unsafe conditions

Method used

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  • Life safety device with automatic battery discharge at the end of life
  • Life safety device with automatic battery discharge at the end of life

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] figure 1 A block diagram is shown of a 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 providing Warning device for potentially life-threatening conditions. The life safety device 10 is typically mounted on a wall or ceiling and connected to an alternating current (AC) power source.

[0010] as in figure 1 As shown in , the life safety device includes a low voltage supply (voltage supply) 12, a battery pack 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 .

[0011] A low voltage supply 12 is connected to the AC mains input, as represented by a line input L and a neutral input N. Low voltage supply 12 converts the AC input power to DC charging power, ...

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PUM

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Abstract

When a rechargeable battery of a life safety device reaches its end of life, the life safety device provides an audible signal indicating that replacement is required. When the device is disconnected from line power, the rechargeable battery still contains a significant amount of energy. The device automatically begins controlled discharge the battery until the stored energy has been reduced to a safe level for disposal of the life safety device and its battery.

Description

technical field [0001] The present invention relates to life safety devices and in particular to hazard detectors such as carbon monoxide and smoke detectors which are commonly mounted on walls and ceilings of buildings. Background technique [0002] 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. The life safety device may be powered by a battery pack including rechargeable batteries. The life safety device is connected to an AC power source that provides power for charging the rechargeable battery. [0003] When a life safety device reaches the end of its useful life, it may generate a warning signal, such as a beep, indicating that it has entered a "failure" (or "end of life") mode. This signals the user that it is time to disconnect the life safety device from AC power and discard it. Rechargeable batteries, such as rechargeable lithium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/00G08B3/10
CPCG08B29/181G01R31/3627G08B17/10H02J7/0047G01R31/385H02J7/0048H02J7/005
Inventor T.西尔弗S.伯尼特M.J.布赫霍尔茨
Owner WALTER KIDDE PORTABLE EQUIP