Emergency power supply charging relay circuit

Abstract

The utility model discloses an emergency power supply charging relay circuit comprising a first PCB and a second PCB, the first PCB is provided with a power supply input interface, a battery electric quantity detection module, an LDO voltage reduction module, an output control module, an LED indication module, a main control module, a signal generation module and an output end clamp state detection module, and the second PCB is provided with a voice broadcast module. The power input interface is connected with the battery electric quantity detection module, the output end of the battery electric quantity detection module is connected with the voice broadcast module and the LDO voltage reduction module, the LDO voltage reduction module is connected with the main control module, the output end of the main control module is connected with the output control module and the signal generation module, and the signal generation module is connected with the output end clamp state detection module. The circuit is arranged on a starting power line of the emergency starting power supply, has multiple protection functions of reverse pole protection, output short circuit protection, overvoltage protection, overcurrent protection and the like, has no spark during power-on, ensures safety and reverse charging protection, and ensures user safety.

Description

Technical Field

[0001] This utility model relates to the field of automotive emergency jump starter technology, and more particularly to an emergency power supply charging relay circuit. Background Technology

[0002] Traditional car jump starter cables have a relatively simple function. When the car battery is dead and the vehicle cannot start normally, the user connects the jumper cable to the positive and negative terminals of the emergency power supply and the car battery respectively to start the vehicle. These jumper cables are generally quite ordinary, without voice prompts, and can easily damage the power supply if the positive and negative terminals are reversed. They also lack any protection measures and have poor safety. Utility Model Content

[0003] Technical problems to be solved

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an emergency power supply charging relay circuit.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An emergency power supply charging relay circuit includes a first PCB board and a second PCB board. The first PCB board is provided with a power input interface, a battery power detection module, an LDO step-down module, an output control module, an LED indicator module, a main control module, a signal generation module, and an output clip status detection module. The second PCB board is provided with a voice broadcast module. The power input interface is connected to the battery power detection module. The output of the battery power detection module is connected to the voice broadcast module and the LDO step-down module. The LDO step-down module is connected to the main control module. The output of the main control module is connected to the output control module and the signal generation module. The signal generation module is connected to the output clip status detection module. The output clip status detection module is connected to the main control module and the LED indicator module. The LED indicator module is electrically connected to the voice broadcast module.

[0008] More specifically, the battery power detection module includes a current detection module and a voltage detection module.

[0009] More specifically, the LED indicator module includes four sets of four LED diodes connected in parallel, namely LED diodes 1, 2, 3, and 4, which are electrically connected to the main control module through four resistors.

[0010] More specifically, the output clamp status detection module includes a reverse connection detection module and a temperature detection module.

[0011] More specifically, the main control module includes an MCU chip (U1), which has pins 1-14. Pins 2, 3, 5, and 9 are connected to LEDs 1, 2, 3, and 4 respectively. Pin 8 is connected to the output control module. Pin 10 is connected to the output control module. Pin 11 is connected to the current detection module. Pin 12 is connected to the signal generation module. Pin 13 is connected to the temperature detection module. Pin 1 is connected to a 5V voltage source. Pin 14 is grounded. A capacitor is connected between pin 1 and pin 14.

[0012] Beneficial effects:

[0013] The main advantages of this utility model are as follows: This circuit is set on the starting power line of the emergency jump starter, which improves the safety of the car emergency jump starter; This circuit is set on the power transmission line, based on AI (artificial intelligence) voice broadcast, and has multiple protection functions such as reverse polarity protection, output short circuit protection, overvoltage protection, and overcurrent protection. There are no sparks when jumping on, ensuring safety and reverse charging protection, ensuring user safety.

[0014] This circuit supports low-power start-up and low-voltage detection: even if the car battery voltage is as low as 3V, the engine can be started using this jumper cable.

[0015] This circuit has low internal resistance, small size, and large output current, reaching a maximum starting current of 450A, and can be used with a 16,000mAh starter. Attached Figure Description

[0016] Figure 1 This is the circuit schematic diagram of this utility model;

[0017] Figure 2 Pin diagram of the main control module of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-2As shown, this utility model provides a technical solution: an embodiment of an emergency power supply charging relay circuit, including a first PCB board and a second PCB board. The first PCB board is provided with a power input interface, a battery power detection module, an LDO step-down module, an output control module, an LED indicator module, a main control module, a signal generation module, and an output clip status detection module. The second PCB board is provided with a voice broadcast module. The power input interface is connected to the battery power detection module. The output of the battery power detection module is connected to the voice broadcast module and the LDO step-down module. The LDO step-down module is connected to the main control module. The output of the main control module is connected to the output control module and the signal generation module. The signal generation module is connected to the output clip status detection module. The output clip status detection module is connected to the main control module and the LED indicator module. The LED indicator module is electrically connected to the voice broadcast module.

[0020] The battery power detection module includes a current detection module and a voltage detection module. After the emergency jump starter is connected to the positive and negative terminals of the car battery via jumper cables, the battery capacity can be calculated by detecting the current and voltage values. This information is then transmitted to the voice broadcast module and LED indicator module for intelligent voice prompts, allowing users to directly obtain the car battery status information when jump-starting.

[0021] The LED indicator module includes four sets of four LED diodes connected in parallel. The four LED diodes are LED diodes numbered 1, 2, 3, and 4. The four LED diodes are electrically connected to the main control module through four resistors. The four LED diodes are mainly used to display the working status.

[0022] The output clamp status detection module includes a reverse connection detection module and a temperature detection module, which are used to detect whether the positive and negative terminals are correctly connected and to detect the temperature during operation, respectively.

[0023] The main control module includes an MCU chip (U1), which has pins 1-14. Pins 2, 3, 5, and 9 are connected to LEDs 1, 2, 3, and 4 respectively to display the working status. Pin 8 is connected to the output control module to transmit the MCU's output control commands to the output control module. Pin 10 is connected to the reverse connection detection module. When the positive and negative terminals are reversed, the MCU chip (U1) will receive the relevant signals and output the corresponding LED signals and output control signals. Pin 11 is connected to the current detection module. Pin 12 is connected to the signal source module. Pin 13 is connected to the temperature detection module to receive the temperature value from the temperature detection module. Pin 1 is connected to a 5V voltage source. Pin 14 is grounded. A capacitor is connected between pin 1 and pin 14.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An emergency power supply charging relay circuit, characterized in that, The system includes a first PCB board and a second PCB board. The first PCB board is equipped with a power input interface, a battery power detection module, an LDO step-down module, an output control module, an LED indicator module, a main control module, a signal generation module, and an output clip status detection module. The second PCB board is equipped with a voice broadcast module. The power input interface is connected to the battery power detection module. The output of the battery power detection module is connected to the voice broadcast module and the LDO step-down module. The LDO step-down module is connected to the main control module. The output of the main control module is connected to the output control module and the signal generation module. The signal generation module is connected to the output clip status detection module. The output clip status detection module is connected to the main control module and the LED indicator module. The LED indicator module is electrically connected to the voice broadcast module.

2. The emergency power supply charging relay circuit according to claim 1, characterized in that: The battery power detection module includes a current detection module and a voltage detection module.

3. The emergency power supply charging relay circuit according to claim 1, characterized in that: The LED indicator module includes four sets of four LED diodes connected in parallel. The four LED diodes include LED diodes 1, 2, 3, and 4. The four LED diodes are electrically connected to the main control module through four resistors.

4. The emergency power supply charging relay circuit according to claim 1, characterized in that: The output clamp status detection module includes a reverse connection detection module and a temperature detection module.

5. The emergency power supply charging relay circuit according to claim 1, characterized in that: The main control module includes an MCU chip (U1), which has pins 1-14. Pins 2, 3, 5, and 9 are connected to LEDs 1, 2, 3, and 4 respectively. Pin 8 and pin 10 are connected to the output control module. Pin 11 is connected to the current detection module. Pin 12 is connected to the signal generation module. Pin 13 is connected to the temperature detection module. Pin 1 is connected to a 5V voltage source. Pin 14 is grounded. A capacitor is connected between pin 1 and pin 14.

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