A handheld device for jump starting a vehicle engine includes a rechargeable lithium ion battery pack, a microcontroller, and a jumper cable device. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs connectable to the jumper cable device detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected to the circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs, such that the microcontroller will enable power to be delivered from the lithium ion power pack to the output port only when a good battery is connected to the output port and jumper cable device, and only when the battery is connected with proper polarity of positive and negative terminals.
PORTABLE VEHICLE BATTERY JUMP START APPARATUS WITH SAFETY PROTECTION AND JUMPER CABLE DEVICE THEREOF
2018-08-02
Patent
Electronic Resource
English
Portable vehicle battery jump start apparatus with safety protection and jumper cable device thereof
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