Power supply automatic start-stop control circuit of marine equipment

Abstract

A power supply automatic start-stop control circuit of marine equipment is used for controlling automatic start-stop of an auxiliary power supply and comprises a first detection unit, a second detection unit and a switch control unit. One end of the first detection unit is connected with the output end of the auxiliary power supply to detect the output voltage of the auxiliary power supply; one end of the second detection unit is connected with the main power supply to detect output voltage of the main power supply; the control end of the switch control unit is connected with the output end of the first detection unit and the output end of the second detection unit so that the auxiliary power supply can be controlled to be turned on when the control end voltage is larger than or equal to a set voltage threshold value, or the auxiliary power supply can be turned off when the control end voltage is lower than the set voltage threshold value. According to the utility model, start-stop points can be set, and damage caused by over-discharge of the energy storage system can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of power supply control of marine equipment, in particular to an automatic start-stop control circuit of power supply of marine equipment. Background Art

[0002] With the development of science and technology, electronic devices with various functions are installed on vehicles and ships, providing many conveniences for people's lives. At the same time, after the vehicle and ship are powered on and off, in order to prevent the energy storage system of the vehicle and ship from over-discharging, various circuits for automatically starting or shutting down the energy storage power supply are used in the equipment power supply. However, the traditional solution using a button self-starting circuit cannot take into account both low cost and the full realization of the automatic start and stop function.

[0003] At present, a self-starting circuit is disclosed, including a first delay circuit, a second delay circuit, a first switch circuit and a second switch circuit, etc. After the external power supply is turned on, when the delay time of the first delay circuit reaches the first preset time, and when the delay time of the second delay circuit reaches the second preset time, the first switch circuit and the second switch circuit are in an alternating conduction state, and the third end of the first switch circuit sequentially outputs a first level start signal, a second level start signal, and a first level start signal. When the duration of the second level start signal reaches the preset start time, the device to be started is started, so that two delay times are set to replace the time of continuously pressing the key, so as to be suitable for starting the device that does not support the key. In practical applications, the switch of this circuit cannot set the start and stop voltage points due to the large discreteness of the start voltage, which is not conducive to the energy saving of the device and the flexible change of the start and stop logic of the device. If the power input is a battery system, the battery may be over-discharged and damaged. Utility Model Content

[0004] The main purpose of the utility model is to overcome the defects of the existing automatic start-stop control circuit that the start and stop voltage points cannot be set, which is not conducive to the energy saving of the equipment and the flexible change of the start-stop logic of the equipment. An automatic start-stop control circuit for the power supply of marine equipment is proposed, which can set the start and stop points and effectively avoid the damage caused by excessive discharge of the energy storage system.

[0005] The utility model adopts the following technical solutions:

[0006] A power automatic start and stop control circuit for marine equipment is used to control the automatic start and stop of an auxiliary power supply, comprising a first detection unit, a second detection unit and a switch control unit; one end of the first detection unit is connected to the output end of the auxiliary power supply to detect the output voltage of the auxiliary power supply; one end of the second detection unit is connected to the main power supply to detect the output voltage of the main power supply; the output end of the switch control unit is connected to the input end of the auxiliary power supply, and the control end of the switch control unit is connected to the output end of the first detection unit and the output end of the second detection unit to control the auxiliary power supply to be turned on when the voltage at the control end is greater than or equal to a set voltage threshold, or to turn off the auxiliary power supply when the voltage at the control end is lower than the set voltage threshold.

[0007] Furthermore, the first detection unit includes a resistor R1 and a diode D1, one end of the resistor R1 is connected to the output end of the auxiliary power supply, the other end of the resistor R1 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the control end of the switch control unit.

[0008] Furthermore, the second detection unit includes a resistor R2 and a resistor R3, one end of the resistor R2 is connected to the output end of the main power supply, and the other end is connected to one end of the resistor R3 and the control end of the switch control unit, and the other end of the resistor R3 is grounded.

[0009] Furthermore, the switch control unit includes a transistor Q1, a resistor R4, a resistor R5 and a controllable precision voltage regulator IC1; the emitter of the transistor Q1 is connected to the output end of the main power supply, and the collector is connected to the input end of the auxiliary power supply; the resistor R4 is connected between the emitter and the base of the transistor; one end of the resistor R5 is connected to the base of the transistor, and the other end is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit and the output end of the second detection unit.

[0010] Furthermore, the switch control unit includes a resistor R4 and a controllable precision voltage regulator IC1, one end of the resistor R4 is connected to the auxiliary power input end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit and the output end of the second detection unit.

[0011] Furthermore, the switch control unit includes a resistor R4, a controllable precision voltage regulator IC1 and a Zener diode ZD1, one end of the resistor R4 is connected to the main power supply output end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is connected to the auxiliary power supply input end and the cathode of the Zener diode ZD1, and the anode of the Zener diode ZD1 is grounded; the reference end of the controllable precision voltage regulator IC1 serves as the control end and the output end of the first detection unit and the output end of the second detection unit.

[0012] Furthermore, it is configured that when the voltage at the output end of the main power supply reaches or exceeds the set starting voltage, the voltage at the control end of the switch control unit reaches or exceeds the set voltage threshold, and the switch control unit turns on the auxiliary power supply; and it is configured that when the voltage at the output end of the main power supply reaches the set start-stop voltage, the voltage at the control end of the switch control unit is less than the set voltage threshold, and the switch control unit turns off the auxiliary power supply.

[0013] Furthermore, at least two of the first detection units are included, and at least two of the first detection units are arranged in parallel.

[0014] It can be seen from the above description of the utility model that compared with the prior art, the utility model has the following beneficial effects:

[0015] A power automatic start and stop control circuit for marine equipment is used to control the automatic start and stop of an auxiliary power supply, comprising a first detection unit, a second detection unit and a switch control unit; the first detection unit is used to detect the voltage of the auxiliary power supply, the second detection unit is used to detect the voltage of the main power supply, the control end of the switch control unit is connected to the output ends of the first detection unit and the second detection unit to control the auxiliary power supply to be turned on or off when the voltage at the control end exceeds or falls below a set voltage threshold, and can realize automatic start and stop, and can set start and stop points, effectively avoiding damage caused by excessive discharge of an energy storage system.

[0016] 2. In the utility model, the first detection unit includes a resistor R1 and a diode D1, and the second detection unit includes a resistor R2 and a resistor R3. By adjusting the first detection unit and the second detection unit, the circuit structure is simple, and the voltage of the control end connected to the switch control unit can be adjusted by adjusting the circuit parameters of the first detection unit and the second detection unit, so as to meet different needs.

[0017] 3. In the utility model, the switch control unit includes a transistor Q1, a resistor R4, a resistor R5 and a controllable precision voltage regulator IC1, which can accurately turn on the transistor Q1 at the start point of the main power supply voltage V1, and can also accurately turn off the transistor Q1 at the turn-off point of the main power supply voltage V1, thereby controlling the switch of the auxiliary power supply. By selecting a controllable precision voltage regulator IC1 with different reference voltages, the start voltage and stop voltage of the main power supply voltage can also be flexibly adjusted.

[0018] 4. In the utility model, multiple groups of first detection units can be connected in parallel at the reference end of the controllable precision voltage regulator IC1 to adapt to different needs, and the first detection unit can also be deformed to adapt to different needs, so that the starting voltage and stopping voltage of the main power supply voltage V1 can be determined according to the actual needs of the equipment application.

[0019] 5. In the present invention, the starting voltage accuracy of the equipment is determined by the accuracy of the controllable precision voltage regulator, and the error of the start-stop voltage is only 1%.

[0020] 6. In the present invention, the switch control unit may also adopt a wake-up circuit, which can accurately output a wake-up signal at the start point of the main power voltage V1, and can also accurately stop the wake-up signal at the shut-off point of the main power voltage V1, thereby controlling the switch of the auxiliary power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the utility model (Example 1);

[0022] Figure 2 This is a structural diagram of the utility model (Example 2);

[0023] Figure 3 This is a structural diagram of the utility model (Example 3). DETAILED DESCRIPTION

[0024] The present invention is further described below through specific implementation methods.

[0025] The terms "first" and "second" appearing in the present invention are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or primary and secondary relationship.

[0026] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0027] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0028] Embodiment 1

[0029] See also Figure 1 A power automatic start and stop control circuit for marine equipment is used to control the automatic start and stop of an auxiliary power supply, and includes a first detection unit 10, a second detection unit 20, and a switch control unit 30. One end of the first detection unit 10 is connected to the output end of the auxiliary power supply, and the first detection unit 10 can detect the output voltage of the auxiliary power supply; one end of the second detection unit 20 is connected to the main power supply, and the second detection unit 20 can detect the output voltage of the main power supply; the output end of the switch control unit 30 is connected to the input end of the auxiliary power supply, and the control end of the switch control unit 30 is connected to the output end of the first detection unit 10 and the output end of the second detection unit 20 to control the auxiliary power supply to be turned on when the control end voltage is greater than or equal to a set voltage threshold, or to turn off the auxiliary power supply when the control end voltage is lower than the set voltage threshold.

[0030] The first detection unit 10 includes a resistor R1 and a diode D1, one end of the resistor R1 is connected to the output end of the auxiliary power supply, the other end of the resistor R1 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the control end of the switch control unit 30. When there is no voltage output at the output end of the auxiliary power supply, the diode D1 is reversely cut off, and the first detection unit 10 does not participate in the circuit operation; when there is a voltage output at the output end of the auxiliary power supply, the cathode of the diode D1 outputs the voltage.

[0031] The second detection unit 20 includes a resistor R2 and a resistor R3, one end of the resistor R2 is connected to the output end of the main power supply, and the other end is connected to one end of the resistor R3 and the control end of the switch control unit 30, the other end of the resistor R3 is grounded, and the other end of the resistor R2 is also connected to the cathode of the diode D1. When there is no voltage output at the output end of the main power supply, there is no voltage output at the output end of the second detection unit 20, that is, the other end of the resistor R2. When there is a voltage output at the output end of the main power supply, due to the voltage dividing effect of the resistor R2 and the resistor R3, there is also a voltage output at the output end of the second detection unit 20.

[0032] The switch control unit 30 includes a transistor Q1, a resistor R4, a resistor R5 and a controllable precision voltage regulator IC1. The emitter of the transistor Q1 is connected to the output end of the main power supply, and the collector is connected to the input end of the auxiliary power supply; the resistor R4 is connected between the emitter and the base of the transistor; one end of the resistor R5 is connected to the base of the transistor, and the other end is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit 10 and the output end of the second detection unit 20.

[0033] Among them, after the main power supply is turned on, the reference terminal voltage of the controllable precision voltage regulator IC1 can change with the auxiliary power switch state. When the auxiliary power supply is in the off state, the reference terminal voltage formula of the controllable precision voltage regulator IC1 is as follows:

[0034]

[0035] After the auxiliary power supply is turned on, the reference terminal voltage formula of the controllable precision voltage regulator IC1 is as follows:

[0036]

[0037] Among them, V ref is the reference voltage, V1 is the main power supply voltage, V3 is the auxiliary power supply voltage, V D1 is the voltage drop of diode D1, R1, R2, R3 are the resistance values ​​of resistor R1, resistor R2, resistor R3 respectively.

[0038] Among them, when the reference terminal voltage of the controllable precision voltage regulator IC1 reaches or exceeds the set threshold, the controllable precision voltage regulator IC1 is turned on and its cathode outputs a low level, so that the transistor Q1 is turned on; when the reference terminal voltage of the controllable precision voltage regulator IC1 is less than the set threshold, the controllable precision voltage regulator IC1 is turned off, and its cathode outputs a high level, thereby turning off the transistor Q1. The transistor Q1 can be a transistor such as NPN or PNP. When the transistor Q1 is turned on, the voltage output by the collector of the transistor Q1 increases to the voltage of the emitter, thereby turning on the auxiliary power supply. When the transistor Q1 is turned off, the voltage output by the collector of the transistor Q1 decreases until the auxiliary power supply is turned off.

[0039] In the utility model, when the voltage at the output end of the main power supply reaches or exceeds the set starting voltage, the voltage at the control end of the switch control unit 30 reaches or exceeds the set voltage threshold, and the switch control unit 30 turns on the auxiliary power supply; and when the voltage at the output end of the main power supply reaches the set start-stop voltage, the voltage at the control end of the switch control unit 30 is less than the set voltage threshold, and the switch control unit 30 turns off the auxiliary power supply.

[0040] The working principle of this embodiment is as follows:

[0041] When the device is not turned on, the auxiliary power supply is in the off state, there is no voltage at the input end of the first detection unit 10, and the diode D1 is reversed and cut off and does not participate in the circuit operation; as the main power input V1 increases, due to the voltage-dividing effect of the resistors R2 and R3, the reference terminal voltage of the controllable precision voltage regulator IC1 gradually increases to the set voltage threshold, at which time the controllable precision voltage regulator IC1 is turned on, the cathode voltage of the controllable precision voltage regulator IC1 is pulled down to a low level, current flows through the base of the transistor Q1, the transistor Q1 is turned on, and the auxiliary power input terminal voltage V2 of the collector of the transistor Q1 increases to a voltage V1 close to the output voltage of the active source, and the auxiliary power supply can be turned on according to the set logic.

[0042] When the auxiliary power supply is turned on, the voltage V3 outputted from the auxiliary power supply output terminal reaches a normal value, the first detection unit 10 works, and the reference terminal voltage of the controllable precision voltage regulator IC1 is the voltage value after the voltage V3 of the auxiliary power supply and the voltage V1 of the main power supply are combined, see formula (2). At this time, if the voltage V1 of the main power supply drops to the voltage just when it is turned on, due to the effect of the auxiliary power supply output V3, the reference terminal voltage of the controllable precision voltage regulator IC1 will be higher than before the auxiliary power supply is turned on. The controllable precision voltage regulator IC1 is still turned on, and the auxiliary power supply input V2 still works normally. As the voltage of the main power supply input V1 continues to drop, the reference terminal voltage of the controllable precision voltage regulator IC1 follows and drops below the threshold. At this time, the controllable precision voltage regulator IC1 is turned off, the transistor Q1 is turned off, and the voltage of the auxiliary power supply input V2 begins to drop until the auxiliary power supply is turned off and the main power supply returns to its initial state. At this time, the reference terminal voltage of the controllable precision voltage regulator IC1 drops further to avoid repeated restarts of the main power supply.

[0043] When the device is started, the voltage value of the reference terminal of the controllable precision voltage regulator in the switch control unit 30 is increased according to the voltage value of the auxiliary power supply, and the threshold voltage of the main power input V1 connected to the auxiliary power supply V2 is reduced.

[0044] In practical applications, the present invention may include a plurality of first detection units 10, wherein the plurality of first detection units 10 are arranged in parallel.

[0045] The utility model can accurately turn on the transistor Q1 at the start point of the voltage V1 of the main power supply, and can also accurately turn off the transistor Q1 at the cut-off point of the voltage V1 of the main power supply, thereby controlling the switch of the auxiliary power supply. Based on the above principle, at least two first detection units 10 can be connected in parallel to the reference end of the controllable precision voltage regulator IC1 to adapt to different needs, and the first detection unit 10 can also be deformed to adapt to different needs. Due to changes in the actual application requirements of the equipment, different circuit parameters and IC1 with different reference voltages can be selected according to Formula 1 and Formula 2, and the start voltage and stop voltage of the main power supply voltage V1 can be flexibly adjusted.

[0046] Embodiment 2

[0047] See also Figure 2 , a power automatic start-stop control circuit for marine equipment, the main structure of which is the same as that of the first embodiment, except that the structure of the switch control unit 30 is different. In this embodiment, the switch control unit 30 adopts a wake-up circuit, including a resistor R4 and a controllable precision voltage regulator IC1, one end of the resistor R4 is connected to the auxiliary power input end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 is used as a control end and the output end of the first detection unit 10 and the output end of the second detection unit 20.

[0048] The working principle of this embodiment is as follows:

[0049] When the device is not turned on, the auxiliary power supply is in the off state, there is no voltage at the input end of the first detection unit 10, and the diode D1 is reversed and cut off and does not participate in the circuit operation; as the main power input V1 power supply increases to the starting voltage, due to the voltage dividing effect of the resistor R2 and the resistor R3, the reference terminal voltage of the controllable precision voltage regulator IC1 gradually increases to the set voltage threshold. At this time, the controllable precision voltage regulator IC1 is turned on, and the cathode voltage of the controllable precision voltage regulator IC1 is pulled down to a low level, pulling the device's wake-up signal V2 down to a low level.

[0050] When the auxiliary power supply is turned on, the voltage V3 outputted from the auxiliary power supply output terminal reaches a normal value, and the first detection unit 10 works. The reference terminal voltage of the controllable precision voltage regulator IC1 is the voltage value after the voltage V3 of the auxiliary power supply and the voltage V1 of the main power supply are combined, as shown in Formula 2. At this time, if the voltage V1 of the main power supply drops to the voltage just when it is turned on, due to the effect of the auxiliary power supply output V3, the reference terminal voltage of the controllable precision voltage regulator IC1 is higher than before the auxiliary power supply is turned on. The controllable precision voltage regulator IC1 is still turned on, and the auxiliary power supply input V2 is still working normally. As the voltage of the main power supply input V1 continues to drop, the reference terminal voltage of the controllable precision voltage regulator IC1 follows and drops below the threshold. At this time, the controllable precision voltage regulator IC1 is turned off. According to the device logic, the auxiliary power supply can be turned off, and the circuit is restored to the initial state. At this time, the reference terminal voltage of the controllable precision voltage regulator IC1 drops further to ensure that the wake-up signal is stable in an open circuit state.

[0051] The cathode of the controllable precision voltage regulator IC1 is connected to the wake-up signal V2 through the resistor R4. The voltage of the wake-up signal V2 can be reduced to a low level after the voltage of the power input V1 reaches the starting point. This embodiment can replace the switch of the device according to the device requirements to realize automatic start and stop of the device, or be used to wake up a control chip that needs to be awakened by a low-level signal in hibernation.

[0052] Embodiment 3

[0053] See also Figure 3 , a power automatic start-stop control circuit for marine equipment, whose main structure is the same as that of the first embodiment, except that the structure of the switch control unit 30 is different. In this embodiment, the switch control unit 30 adopts a wake-up circuit, including a resistor R4, a controllable precision voltage regulator IC1 and a Zener diode ZD1, one end of the resistor R4 is connected to the main power output end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is connected to the auxiliary power input end and the cathode of the Zener diode ZD1, and the anode of the Zener diode ZD1 is grounded; the reference end of the controllable precision voltage regulator IC1 is used as the control end and the output end of the first detection unit 10 and the output end of the second detection unit 20.

[0054] The working principle of this embodiment:

[0055] When the device is not turned on, the auxiliary power supply is in the off state, there is no voltage at the input end of the first detection unit 10, and the diode D1 is reversed and cut off and does not participate in the circuit operation; as the main power input V1 power supply increases to the start-up threshold, due to the voltage dividing effect of the resistor R2 and the resistor R3, the reference terminal voltage of the controllable precision voltage regulator IC1 gradually increases to the set voltage threshold. At this time, the controllable precision voltage regulator IC1 is turned on, and the anode voltage of the controllable precision voltage regulator IC1 is pulled up to a high level, providing a wake-up signal V2 for the auxiliary power supply circuit of the device. At the same time, a Zener diode ZD1 is added to prevent the wake-up signal V2 from being over-voltage and causing damage to the device.

[0056] When the auxiliary power supply is turned on, the voltage V3 outputted from the auxiliary power supply output terminal reaches a normal value, and the first detection unit 10 works. The reference terminal voltage of the controllable precision voltage regulator IC1 is the voltage value after the voltage V3 of the auxiliary power supply and the voltage V1 of the main power supply are combined, as shown in Formula 2. At this time, if the voltage V1 of the main power supply drops to the voltage just when it is turned on, due to the effect of the auxiliary power supply output V3, the reference terminal voltage of the controllable precision voltage regulator IC1 is higher than before the auxiliary power supply is turned on. The controllable precision voltage regulator IC1 is still turned on, and the auxiliary power supply input V2 is still working normally. As the voltage of the main power supply input V1 continues to drop, the reference terminal voltage of the controllable precision voltage regulator IC1 follows and drops below the threshold. At this time, the controllable precision voltage regulator IC1 is turned off. According to the device logic, the auxiliary power supply can be turned off, and the circuit is restored to the initial state. At this time, the reference terminal voltage of the controllable precision voltage regulator IC1 drops further to ensure that the wake-up signal is stable in an open circuit state.

[0057] like Figure 3As shown, the cathode of the controllable precision voltage regulator IC1 is connected to the power input V1 through the resistor R4, and the anode of the controllable precision voltage regulator IC1 is connected to the wake-up signal V2. After the power input V1 voltage reaches the starting point, the voltage of the wake-up signal V2 can be increased to a high level. This embodiment can replace the switch of the device according to the device requirements to realize the automatic start and stop of the device, or be used to wake up the control chip that needs to be awakened by a high-level signal in hibernation. Among them, the Zener diode ZD1 is used to protect the wake-up signal V2, and the selection can be adjusted according to the voltage resistance requirements of the device.

[0058] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A power automatic start and stop control circuit for marine equipment, used to control the automatic start and stop of auxiliary power supply, characterized in that: It includes a first detection unit, a second detection unit and a switch control unit; one end of the first detection unit is connected to the output end of the auxiliary power supply to detect the output voltage of the auxiliary power supply; one end of the second detection unit is connected to the main power supply to detect the output voltage of the main power supply; the output end of the switch control unit is connected to the input end of the auxiliary power supply, and the control end of the switch control unit is connected to the output end of the first detection unit and the output end of the second detection unit to control the auxiliary power supply to be turned on when the voltage at the control end is greater than or equal to a set voltage threshold, or to turn off the auxiliary power supply when the voltage at the control end is lower than the set voltage threshold.

2. The power automatic start and stop control circuit of a marine equipment according to claim 1, characterized in that: The first detection unit includes a resistor R1 and a diode D1, one end of the resistor R1 is connected to the output end of the auxiliary power supply, the other end of the resistor R1 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the control end of the switch control unit.

3. The power automatic start and stop control circuit of a marine equipment according to claim 1, characterized in that: The second detection unit includes a resistor R2 and a resistor R3, wherein one end of the resistor R2 is connected to the output end of the main power supply, and the other end is connected to one end of the resistor R3 and the control end of the switch control unit, and the other end of the resistor R3 is grounded.

4. The power automatic start and stop control circuit of a marine equipment according to claim 1, characterized in that: The switch control unit includes a transistor Q1, a resistor R4, a resistor R5 and a controllable precision voltage regulator IC1; the emitter of the transistor Q1 is connected to the output end of the main power supply, and the collector is connected to the input end of the auxiliary power supply; the resistor R4 is connected between the emitter and the base of the transistor; one end of the resistor R5 is connected to the base of the transistor, and the other end is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit and the output end of the second detection unit.

5. The power automatic start and stop control circuit of a marine equipment according to claim 1, characterized in that: The switch control unit includes a resistor R4 and a controllable precision voltage regulator IC1, one end of the resistor R4 is connected to the auxiliary power input end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is grounded, and the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit and the output end of the second detection unit.

6. The power automatic start and stop control circuit of a marine equipment according to claim 1, characterized in that: The switch control unit includes a resistor R4, a controllable precision voltage regulator IC1 and a Zener diode ZD1, one end of the resistor R4 is connected to the main power supply output end, the other end of the resistor R4 is connected to the cathode of the controllable precision voltage regulator IC1, the anode of the controllable precision voltage regulator IC1 is connected to the auxiliary power supply input end and the cathode of the Zener diode ZD1, and the anode of the Zener diode ZD1 is grounded; the reference end of the controllable precision voltage regulator IC1 serves as a control end and the output end of the first detection unit and the output end of the second detection unit.

7. The power automatic start and stop control circuit for marine equipment according to claim 1, characterized in that: It is configured that when the voltage at the output end of the main power supply reaches or exceeds the set starting voltage, the voltage at the control end of the switch control unit reaches or exceeds the set voltage threshold, and the switch control unit turns on the auxiliary power supply; and it is configured that when the voltage at the output end of the main power supply reaches the set start-stop voltage, the voltage at the control end of the switch control unit is less than the set voltage threshold, and the switch control unit turns off the auxiliary power supply.

8. The power automatic start and stop control circuit for marine equipment according to claim 1, characterized in that: At least two of the first detection units are included, and at least two of the first detection units are arranged in parallel.

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