Chemistry: electrical current producing apparatus – product – and – With nonbattery electrical component electrically connected...
Patent
1997-03-03
1999-02-16
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
With nonbattery electrical component electrically connected...
429 61, 429 62, 429 65, 327403, H01M 234
Patent
active
058718583
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an anti-theft battery and in particular to a switch device to be used for instance in such a battery.
BACKGROUND
Motor vehicles having internal combustion engines are most often started by means of an electrically powered starter motor which obtains its powering current from a battery which conventionally comprises several electrolytic battery cells containing plates submerged into an electrolyte. The battery is connected to the starter motor by means of a switch in an ignition lock which is switched on at turning a key.
It is however relatively difficult to protect such a conventional system against theft since the switch in the ignition lock can be by-passed in a simple manner. There is thus a need for alternative ways of protecting motor vehicles against theft. A possibility therefor is arranging an anti-theft device directly in or at the battery as will be apparent from the discussion below.
PRIOR ART
The published British patent application GB-A 2263012 for David John Cuckow et al. discloses an anti-theft battery comprising an electrical switch 2, S placed inside the battery vessel 8 below the level of the electrolyte 6.
The U.S. Pat. No. 5,023,591 for Allen V. Edwards and the corresponding published International patent application WO-A1 91/07297 disclose anti-theft control apparatus using a silicon controlled rectifier connected between two cells in a motor vehicle battery. The SCR will only conduct electrical current between the cells when it has received an appropriate signal on its gate electrode. The SCR is connected to upstanding yoke members 40 connected to the plates of the cells.
The published International patent application WO-A1 93/15935 for Northlynn Limited/Richard David Harwood discloses an anti-theft system comprising a motor vehicle battery having a built-in remotely-operated switch to interrupt or limit current flow between one of the battery terminals and the battery cells. A temperature sensor 45 may be used to protect the battery from overcharging and can provide a signal of an excessive temperature in the battery for disconnecting the battery.
The U.S. Pat. No. 4,798,968 for James R. Dean, U.S. Pat. No. 4,958,084, U.S. Pat. No. 5,184,023, both for Louis D. Carlo et al., and the published European patent application EP-A2 0 161 365 for Mr. Gasket Co. which corresponds to the last two patents, disclose anti-theft devices for attachment to a battery. The current through a motor vehicle battery can be monitored and switched off when a substantial amount of current is drawn from the battery such in an attempt to start the vehicle.
The published International patent application WO-A1 94/01894 for B.I.G. Batteries Limited/Peter Philip Gatehouse discloses a security battery for motor vehicles comprising an electronic circuit board 8 comprising a control circuit arranged inside the lid of the battery, above an interior lid 11 placed above the cells.
The published European patent application EP-A2 0 163 822 for Sociedad Espanola del Acumulador Tudor, S.A., discloses an electrical starter battery comprising electronic circuits arranged in a lid of the battery.
From the published European patent application EP-A1 0 448 755 for Anton/Bauer, Inc., an intelligent battery system is previously known which senses electrical current which flows in the direction of the charging current through the positive and negative terminals and the battery cells. As a response thereto a processor inside the battery transfers parameter data for the battery to a separate signal output from the battery.
Similar systems are disclosed in U.S. Pat. No. 4,553,081 and U.S. Pat. No. 4,555,523 for Koenck where also methods for estimating the remaining capacity of a battery are described.
In U.S. Pat. No. 4,289,836 for Jerome H. Lemelson a rechargeable battery is disclosed which is provided with a microprocessor for delivering signals which control the charging of the battery.
DESCRIPTION OF THE INVENTION
It is an object of the invention to provide a switch devic
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Rehnberg Tore
Thomsen Jes
Intra International AB
Kalafut Stephen
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