Output protection circuit for vehicle-mounted high-power direct-current power supply

By designing an output protection circuit in the on-board high-power DC power supply, and detecting and disconnecting the electrical connection when the positive and negative electrodes of the output terminal are reversed, the battery and DC converter damage caused by the reverse connection of the positive and negative electrodes of the output terminal of the on-board DC power supply is solved, ensuring the safety of the vehicle.

CN222691389UActive Publication Date: 2025-03-28MAYTIME (SHENZHEN) TECH CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202421386750.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-03-28
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

The reverse connection of the positive and negative electrodes of the output terminal of the on-board DC power supply will lead to battery damage and DC converter failure, thereby endangering the safety of the vehicle.

Method used

An output protection circuit is designed to detect the polarity state of the output terminal through the protection response circuit and the on-off circuit. When the positive and negative electrodes are detected to reverse the connection, the electrical connection is disconnected to prevent the current from pouring back.

Benefits of technology

Effectively prevent reverse connection of the positive and negative electrodes of the output terminal of the vehicle-mounted high-power DC power supply and backflow of current, ensuring the safety of the battery and DC converter, and avoiding failures and damage.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses an output protection circuit for a vehicle-mounted high-power direct-current power supply. The output protection circuit comprises a protection response circuit and an on-off circuit. And the protection response circuit is used for connecting the on-off circuit with the cathode output end of the vehicle-mounted high-power direct-current power supply and the cathode input end of the load when receiving the protection control electric signal. The on-off circuit comprises a first power switch tube, a second power switch tube and a first resistor. Source electrodes and drain electrodes of the first power switch tube and the second power switch tube are connected in series between an anode output end of the vehicle-mounted high-power direct-current power supply and an anode input end of a load, and the first resistor is used for providing break-over voltage for the first power switch tube and the second power switch tube. The connection state of the positive output end and the positive input end is controlled through the two power switch tubes connected with the source electrodes, so that the reliability during disconnection control of the output protection circuit is ensured, and the positive and negative electrodes of the output end of the vehicle-mounted high-power direct-current power supply are effectively prevented from being reversely connected and the current is prevented from flowing backwards.
Need to check novelty before this filing date? Find Prior Art