5 results about "Trickle charging" patented technology

This disclosure relates to a battery pre-power supply circuit, control method, and intelligent electrical appliance. The battery pre-power supply circuit includes a battery power supply, a pre-power supply output module including a pre-charging circuit, a boost converter circuit, and a primary capacitor. Both the pre-charging circuit and the boost converter circuit are connected to the battery power supply, and both are connected to the primary capacitor. The DC power supply output module includes a trickle charging circuit, a charging switch, and a secondary capacitor. Both the trickle charging circuit and the charging switch are connected to the primary capacitor, and both are connected to the secondary capacitor. A control module has its power supply terminal connected to the primary capacitor, and its input terminal connected to the boost converter circuit to obtain the battery power supply voltage. The control module is also connected to the charging switch to control its on / off state. This disclosure avoids inrush current, ensures that the battery can supply power normally even in a low-charge state, improves battery power utilization, and reduces user costs.

The application relates to the technical field of electric vehicle charging, in particular to an electric vehicle charging method and system based on multiple communication modes, which comprises the following steps: when a communication connection instruction between a target charger and a target electric vehicle is received, a current communication signal feature set of the target electric vehicle is acquired; according to the current communication signal feature set, a current communication protocol type between the target charger and the target electric vehicle is identified; current battery state data of the target electric vehicle is acquired, and the target electric vehicle is charged according to the current battery state data of the target electric vehicle; it is known that the charger is compatible with SIF one-wire, UART single-wire or LIN bus three different communication protocols, the universality and application range of the charger are improved, meanwhile, detailed information of the vehicle battery can be acquired in real time, so that the charging current and time are adjusted according to the actual state of the battery, constant current charging, constant voltage charging, trickle charging and switching of different stages such as constant current charging are realized, and the charging efficiency is improved.

A battery charging and discharging management circuit includes a microcontroller, a microcontroller power supply circuit, an input voltage detection circuit, an input voltage start / stop circuit, a trickle charging circuit, a constant current charging circuit, a battery charging overcurrent detection circuit, a battery charging / discharging overtemperature detection circuit, a battery voltage detection circuit, a battery discharge switch circuit, a circuit operating status indicator circuit, and a battery interface. The trickle charging circuit and the constant current charging circuit are connected in parallel. The external power input is connected to the battery interface through the parallel trickle charging circuit and the constant current charging circuit. The external power supply charges the battery through the trickle charging circuit or the constant current charging circuit. During charging, the battery voltage detection circuit feeds back the detection result to the microcontroller. The microcontroller controls the operation of the trickle charging circuit and the constant current charging circuit. During charging, the microcontroller switches between the trickle charging circuit and the constant current charging circuit according to the battery voltage and charging time to ensure that the battery can be fully charged under different ambient temperatures without overcharging.

This invention relates to the field of electrochemical energy storage technology and discloses a smart fast charging method for lead-acid batteries based on current threshold control. Compared to the traditional constant current and constant voltage charging method with fixed time, this method uses a preset constant current of 0.1-0.3C to charge the lead-acid battery, which is faster than trickle charging of less than 0.05C, rapidly raising the battery from low SOC to medium-high SOC and significantly reducing charging time. Constant voltage charging ends when the charging current drops to 1% of the battery's rated capacity, representing the optimal balance between charging efficiency and charging time, avoiding the blindness of traditional fixed-time control. While shortening the charging time, the battery discharge capacity decreases slightly, and the battery cycle life does not decrease significantly, thus fully balancing charging speed and battery performance. The charging process is automatically adjusted according to the actual state of the battery, avoiding overcharging or undercharging problems that may occur with fixed-time control.