56results about How to "Prevent reverse charging" patented technology

The invention discloses a 12V automobile emergency starting power supply, which comprises a battery pack module; a load end; and an open circuit protection module, which includes a first-stage open circuit protector and a second-stage open circuit protector connected in series between the battery pack module and the load end The protector, the first stage circuit breaker includes a relay, the second stage circuit breaker includes a plurality of parallel thermistors, the circuit breaker protection module also includes a plurality of heating resistors arranged adjacent to each thermistor, and the plurality of heating resistors phase-parallel connection; the control device is used to control the relay and to control multiple heating resistors. Implementing the technical solution of the present invention can solve the technical problem that the ternary lithium battery cannot be used to make a 12V automobile emergency starting power supply in the prior art; implementing the technical solution of the present invention can realize preventing the reverse charging of the ternary lithium battery, overcurrent discharge and The battery is overheated to ensure the safety of the system.

The invention discloses a storage battery pack connection circuit and an intelligent storage battery pack. The storage battery pack connection circuit comprises a plurality of battery units, wherein one pole of each battery unit is electrically connected with one output end of a voltage reduction and stabilizing circuit through a first switch, the other pole of each battery unit is electrically connected with the other output end of the voltage reduction and stabilizing circuit through a second switch, and the input end of the voltage reduction and stabilizing circuit is electrically connected with a charging input circuit. Further, controllable switches are adopted for at least the first switches and the second switches and are controlled by a first control unit. One pole of each battery unit is electrically connected with one output end of the voltage reduction and stabilizing circuit through a third switch and the first switch which are connected in series. The intelligent storage battery pack comprises the storage battery pack connection circuit. According to the storage battery pack connection circuit and the intelligent storage battery pack, the rated charging voltage of the storage battery pack can be changed, reverse charging of the storage battery pack for a charging device is avoided, and the storage battery pack can work in the floating charge state.

The invention provides a ternary lithium battery vehicle emergency starting power source. The objective of the invention is to solve the technical problem of incapability of utilizing ternary lithium batteries to make a vehicle emergency starting power source in the prior art. The ternary lithium battery vehicle emergency starting power source includes a three-ternary lithium battery pack module, a four-ternary lithium battery pack module, a load end connector, a unidirectional self-recovery fuse module which comprises a plurality of parallel-connected unidirectional self-recovery fuses each of which includes a diode and a PTC thermistor which are in series connection, a constant current and constant voltage module which is connected with the four-ternary lithium battery pack module, a discharging relay and a discharging management module, wherein the discharging management module includes a single-chip microcomputer and a discharging switch, the discharging management module is connected with and controls the constant current and constant voltage module and the discharging relay, and the PTC thermistor thermally contacts with the diode. With the ternary lithium battery vehicle emergency starting power source of the technical scheme of the invention adopted, technical problems of high-voltage reverse charging, overcurrent discharging and overheating of ternary lithium batteries can be solved.

The invention relates to safe equipment, in particular to a bridge opening safety door. The bridge opening safety door comprises an electric rolling door; the electric rolling door is installed on the outer wall of abridge opening; a water level sensor is installed on the top inside the bridge opening; the water level sensor is electrically connected with a controller which is electrically connected with a relay A and a relay B, wherein a coil of the relay A is in forward connection with a tubular motor; a coil of the relay B is in reverse connection with the tubular motor; the relay A and the relay B are both electrically connected with a storage battery; the outer wall of the bridge opening is provided with a solar-cell panel; and the solar-cell panel is electrically connected with the storage battery through a solar charge controller. The bridge opening safety door completely eradicates deaths caused by waterlogging in the bridge opening, makes people who rely on luck have no chances to try, completely prevents injuries and deaths caused by waterlogging from happening again, and is suitable for nation-wide general promotion.

The invention provides a battery charger and battery pack disconnection fault detection circuit, which solves the technical problem that the existing power supply system cannot perform fault detection on the connecting wire and the battery; it includes a charger, a charger fault detection circuit unit, an isolation diode , a pulse charging control circuit unit, a battery fault detection circuit unit and a rechargeable battery; the charger is sequentially connected to the rechargeable battery through an isolation diode, a pulse charging control unit, the charger fault detection circuit unit is connected to the charger, and the battery fault detection circuit unit It is connected to the rechargeable battery; the charger fault detection circuit unit is used to detect whether the output voltage of the charger is normal; the pulse charging control circuit unit is used to provide the rechargeable battery with pulse charging voltage and current, and when the rechargeable battery is disconnected, the The rechargeable battery voltage is sampled during the cut-off window for pulse charging. The present invention is widely used in power supply systems.