发明名称 |
USAGE COUNTER FOR PORTABLE JUMP-STARTING BATTERY UNIT |
摘要 |
A usage counter (10) has input terminals (11 and 12) connectable to the terminals of a jump-starting battery pack (15). The counter has an IC comparator (21) which generates an output signal when battery voltage drops below a predetermined reference level. If the output signal persists for a predetermined time period, indicating an attempt to jump-start an engine with the battery pack (15), an IC timer (31) is triggered to output a count pulse which is inverted by inverter (40) and then counted, as well as displayed by an IC counter/display circuit (45). The usage counter circuit (10) is powered by the battery pack (15) and has a Zener diode (17) which provides to the IC circuits a limited supply voltage which is unaffected by voltage spikes which might appear at the battery pack terminals. A capacitor (36) maintains the reference voltage level despite momentary drops in battery terminal voltage.
|
申请公布号 |
WO0152381(A1) |
申请公布日期 |
2001.07.19 |
申请号 |
WO2000US42178 |
申请日期 |
2000.11.14 |
申请人 |
SNAP-ON TECHNOLOGIES, INC. |
发明人 |
CRASS, MATTHEW, M.;BECKER, THOMAS, P. |
分类号 |
G01R31/36;H01M10/48;H02J7/00;(IPC1-7):H02J7/00 |
主分类号 |
G01R31/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|