Solid state safety jumper cables

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:868674

Kronberg, James W ^[1]

---

1. 353 Church Rd., Beech Island, SC 29841

Solid state jumper cables for connecting two batteries in parallel, having two bridge rectifiers for developing a reference voltage, a four-input decoder for determining which terminals are to be connected based on a comparison of the voltage at each of the four terminals to the reference voltage, and a pair of relays for effecting the correct connection depending on the determination of the decoder. No connection will be made unless only one terminal of each battery has a higher voltage than the reference voltage, indicating "positive" terminals, and one has a lower voltage than the reference voltage, indicating "negative" terminals, and that, therefore, the two high voltage terminals may be connected and the two lower voltage terminals may be connected. Current flows once the appropriate relay device is closed. The relay device is preferably a MOSFET (metal oxide semiconductor field effect transistor) combined with a series array of photodiodes that develop MOSFET gate-closing potential when the decoder output causes an LED to light.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• DOE Contract Number: AC09-89SR18035
• Assignee: Kronberg, James W. (353 Church Rd., Beech Island, SC 29841)
• Patent Number(s): US 5189359
• OSTI ID: 868674
• Country of Publication: United States
• Language: English

Related Subjects

solid
safety
jumper
cables
connecting
batteries
parallel
bridge
rectifiers
developing
reference
voltage
four-input
decoder
determining
terminals
connected
based
comparison
pair
relays
effecting
correct
connection
depending
determination
unless
terminal
battery
indicating
positive
negative
current
flows
appropriate
relay
device
closed
preferably
mosfet
metal
oxide
semiconductor
field
effect
transistor
combined
series
array
photodiodes
gate-closing
potential
output
causes
led
light
field effect
metal oxide
current flow
reference voltage
current flows
effect transistor
oxide semiconductor
voltage terminals
semiconductor field
jumper cables
/320/