1. Field of the Invention
The present invention relates to vehicle battery charging technology and more particularly, to a vehicle emergency rescue device that is capable of automatically charging the battery of the vehicle in an emergency situation and has a display device for displaying charging related data.
2. Description of the Related Art
If a car cannot be started due to battery low or aged battery, the car battery must be quickly charged with an external power source.
When charging the car battery, the user needs to open the engine compartment lid, and then disconnect the battery wires, and then fasten battery clamps of a jumper cable to the positive and negative terminals of the car battery to charge the car battery with an external power source. Due to the constraint of current limit, this car battery charging operation must be performed by a technician or skilled person. In order to let ordinary people charge the car battery, specific voltage car battery chargers are created. However, before charging the car battery with a specific voltage car battery charger, the user of the specific voltage car battery charger still needs to open the engine compartment lid and then fasten the battery clamps of the specific voltage car battery charger to the positive and negative terminals of the car battery. This car battery charging procedure is somewhat dangerous to female drivers, and still has its inconveniences.
In order to overcome the aforesaid problem, vehicle emergency rescue devices for charging the car battery of a vehicle in an emergency situation are created.
The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a vehicle emergency rescue device, which enables the user to know the car battery capacity and status, the charging time required and the time remaining for full battery charge during the operation of the vehicle emergency rescue device to charge the car battery of the vehicle.
To achieve this and other objects of the present invention, a vehicle emergency rescue device for use in a vehicle in accordance with the present invention comprises a control unit, a charging and discharging circuit electrically coupled to the control unit, a battery set electrically coupled to the charging and discharging circuit and controllable by the charging and discharging circuit subject to the control of the control unit to be charged by an external power source or to discharge electricity, an output voltage converter electrically coupled to the battery set for receiving discharged battery power supply from the battery set and converting the battery power supply into one of a series of voltage levels for output, a computing unit electrically coupled to the output voltage converter and the control unit for receiving the converted battery power supply outputted by the output voltage converter and measuring the current, voltage, temperature and time size of the converted battery power supply passing therethrough and providing the measured voltage, current and temperature values to the control unit, a connection terminal electrically coupled to the computing unit and electrically connectable to the car cigarette lighter of the vehicle carrying the vehicle emergency rescue device for charging the car battery of the vehicle with the converted batter power supply provided by the output voltage converter, and a display device electrically coupled to the control unit and controllable by the control unit to display charging related data.
Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure.
Referring to
Subject to the functioning of the inner computing unit 6 and the outer display device 8, the user of the vehicle emergency rescue device can know the car battery capacity and status, the charging time required and the time remaining for full battery charge during the operation of the vehicle emergency rescue device to charge the car battery of the vehicle.
Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.