Automobile power supply management device and application method thereof

Abstract

The invention discloses an automobile power supply management device and an application method thereof, and belongs to the field of automobile power supplies, the device comprises a power supply management circuit, the power supply management circuit comprises a voltage input module, a current sampling module, an anti-reverse connection module, a voltage stabilization module, a control module, a temperature sampling module, an indicating lamp module and a voltage output module, the voltage input module is connected to the voltage output module through the current sampling module and the reverse connection prevention module in sequence; the voltage stabilizing module is connected with the voltage output module; the control module is connected with the voltage input module, the current sampling module, the voltage stabilization module, the temperature sampling module and the indicating lamp module. The control module further comprises a communication interface. According to the invention, the functions of voltage conversion, short-circuit protection, redundant use and multi-stage parallel enhanced output of the power supply are realized.

Description

Technical Field

[0001] The present invention belongs to the field of automobile power supplies, and in particular, relates to an automobile power supply management device and an application method thereof. Background Art

[0002] The development of automotive electronics has placed higher and higher demands on power management, especially for multi-voltage combinations, which results in complex systems, high costs, and great development difficulties.

[0003] Different automotive electronic components often need to adapt to specific voltage levels to ensure their stable performance and normal operation. For example, the in-vehicle entertainment system, engine control system, safety assistance system and various sensors may require 5V, 3.3V, 1.8V or even lower voltage power supply. This multi-voltage matching requirement makes the architectural design of automotive electronic systems extremely complex. Numerous voltage conversion modules, circuit protection devices and complex wiring layouts are intertwined, which not only occupies a large amount of space in the car, but also increases the risk of system failure.

[0004] At the same time, in the existing power management unit, the power will be cut off immediately when the load is in a transient overload state. This sudden power off behavior may cause damage to the load in operation.

[0005] Furthermore, since there are many automotive EEA architectures (electronic electrical architectures) and the EEA architecture of each vehicle model is different, there is currently no power management product or solution that can be applied to various EEA architectures.

[0006] To this end, the present application proposes an automobile power management device and an application method thereof. Summary of the invention

[0007] The present invention aims to overcome the deficiencies of the prior art and proposes an automotive power management device and an application method thereof to achieve the following purposes: realizing the functions of power supply voltage conversion, short circuit protection, redundant use, and multi-stage parallel enhanced output.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an automobile power management device, the device includes a power management circuit, the power management circuit includes a voltage input module, a current sampling module, an anti-reverse connection module, a voltage stabilizing module, a control module, a temperature sampling module, an indicator light module, and a voltage output module, wherein the voltage input module is connected to the voltage output module through the current sampling module and the anti-reverse connection module in sequence; the voltage stabilizing module is connected to the voltage output module; the control module is respectively connected to the voltage input module, the current sampling module, the voltage stabilizing module, the temperature sampling module, and the indicator light module; the control module also includes a communication interface.

[0009] Preferably, the voltage input module includes a positive input terminal, a negative input terminal, a transformer, a rectifier bridge, and a first PMOS tube, wherein the positive input terminal is connected to the negative input terminal through the primary side of the transformer, the source of the first PMOS tube, and the drain of the first PMOS tube in sequence; the gate of the first PMOS tube is connected to the control module; the secondary side of the transformer is connected to the input pin of the rectifier bridge; the first output pin of the rectifier bridge is grounded, and the second output pin is connected to the current sampling module.

[0010] Preferably, the anti-reverse connection module includes a second PMOS tube, a first P-type transistor, a second P-type transistor, a first resistor, and a second resistor, wherein the drain of the second PMOS tube is connected to the current sampling module and the lead-out terminal is connected to the emitter of the first P-type transistor; the collector of the first P-type transistor is grounded through the first resistor; the base of the first P-type transistor is connected to the collector of the first P-type transistor and the lead-out terminal is connected to the base of the second P-type transistor; the gate of the second PMOS tube is connected to the collector of the second P-type transistor and the lead-out terminal is grounded through the second resistor; the source of the second PMOS tube is connected to the emitter of the second P-type transistor and the lead-out terminal is connected to the voltage output module.

[0011] Preferably, the device further comprises an energy storage battery, the control module is connected to the voltage stabilizing module and the lead-out terminal is connected to the positive electrode of the energy storage battery; the negative electrode of the energy storage battery is grounded.

[0012] Preferably, the voltage stabilizing module is connected to the voltage output module via a reverse diode.

[0013] Preferably, the device is redundantly configured to communicate with external power supply equipment through the communication interface of the control module.

[0014] Preferably, the indicator light module includes a first indicator light, a second indicator light, a third indicator light, a fourth indicator light, a fifth indicator light, and a sixth indicator light. According to the control signal of the control module, different operating states of the device are indicated by different indicator light states, including:

[0015] The first indicator light, the second indicator light, and the third indicator light are all off, indicating that the device is in a stopped working state;

[0016] The first indicator light goes out, the second indicator light goes out, and the third indicator light turns on, indicating a high voltage input overvoltage fault;

[0017] The first indicator light is off, the second indicator light is on, and the third indicator light is off, indicating a high voltage input undervoltage fault;

[0018] The first indicator light is off, the second indicator light is on, and the third indicator light is on, indicating that the high voltage input power supply is faulty;

[0019] The first indicator light is on, the second indicator light is off, and the third indicator light is off, indicating that the device is in an independent working state;

[0020] The first indicator light is on, the second indicator light is off, and the third indicator light is on, indicating that the device is in full power working state;

[0021] The first indicator light is on, the second indicator light is on, and the third indicator light is off, indicating that the device and its redundant device are working together;

[0022] The first indicator light, the second indicator light, and the third indicator light all light up and remain on for a preset time, indicating that the device has started to work and passed the self-test;

[0023] The first indicator light is on, the second indicator light flashes, and the third indicator light flashes, indicating that the device and its redundant device are working together and the device is in full power state;

[0024] The fourth indicator light, the fifth indicator light, and the sixth indicator light are all off, indicating that the device is in a stopped working state;

[0025] The fourth indicator light goes out, the fifth indicator light goes out, and the sixth indicator light turns on, indicating that the device outputs an overvoltage fault;

[0026] The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device output is undervoltage fault;

[0027] The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is on, indicating that the device output is faulty;

[0028] The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is off, indicating that the device is in an independent working state;

[0029] The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is on, indicating that the load at the output end of the device is short-circuited;

[0030] The fourth indicator light is on, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device is in full load output state;

[0031] The fourth indicator light, the fifth indicator light, and the sixth indicator light all light up and remain on for a preset time, indicating that the device has started working and passed the self-test.

[0032] Preferably, the device further comprises a shell, a base, and an electrical connector, wherein the shell is arranged on the base; the power management circuit is arranged in the base, the input end of the voltage input module, the output end of the voltage output module, and the communication interface are led out through the electrical connector and arranged on the base; and the indicator light module of the power management circuit is arranged on the top of the shell.

[0033] At the same time, the present application also proposes an application method of the automobile power management device, the method comprising the following steps:

[0034] Step S1, when the device is powered normally, the control module monitors the load current through the current sampling module. After a delay, the current load current is collected and compared with the preset overload current threshold to determine whether the load current is normal. If the load current is normal, the current monitoring continues;

[0035] Step S2: If the load current is abnormal, i.e., overloaded, the current load current is compared with the maximum value in the preset current MAP to determine whether the current load current is a peak current. If it is not a peak current, the device maintains normal power supply;

[0036] Step S3: If it is a peak current, compare the current load current with the preset short-circuit critical current value to determine whether there is a short-circuit risk. If there is no short-circuit risk, the device maintains normal power supply;

[0037] Step S4: If there is a short circuit risk, the device will limit the power output; similarly, after a delay, the current load current is collected again and the number of collections is recorded plus one, and then steps S1 to S3 are repeated;

[0038] Step S5: After the number of acquisitions reaches a preset number, if the current device still has a short circuit risk, the device is powered off; otherwise, the device is powered normally.

[0039] In addition, the present application also proposes an application method of an automobile power management device, the method comprising the following steps:

[0040] Step T1: When the device is powered normally, the control module monitors the output power of the device;

[0041] Step T2: when it is detected that the device is in full-load working state, the control module controls the device to maintain the full-power working state and records the holding time;

[0042] Step T3, when judging whether the holding time reaches the preset time threshold, if not, continue to maintain full power operation; otherwise, the control module requests the external power supply device to connect the redundant device of the current device in parallel, and after the parallel connection is successful, the current device and its redundant device jointly supply power to the load;

[0043] Step T4: If the parallel connection fails, the temperature rise of the current device is further detected in real time through the temperature sampling module; if the temperature rise of the device exceeds the preset temperature difference, the device will continue to request parallel connection after limiting the power supply output, otherwise repeat steps T2 to T4.

[0044] The technical effect of the present invention is as follows: the present invention integrates load current monitoring and overload protection functions, and supports communication mode with external power supply equipment. It can be flexibly configured for redundancy or parallel use, reducing the use of wiring harnesses and reducing the copper consumption of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A simplified structural diagram of an automobile power management device according to an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of the appearance and structure of an automobile power management device according to an embodiment of the present invention;

[0047] Figure 3 A schematic diagram of a base electrical connection port of an automotive power management device according to an embodiment of the present invention;

[0048] Figure 4 is a circuit diagram of a power management circuit according to an embodiment of the present invention;

[0049] Figure 5 A schematic diagram of the arrangement of indicator lights on the top of a housing according to an embodiment of the present invention;

[0050] Figure 6 A method flow chart of the first application method of the embodiment of the present invention;

[0051] Figure 7 A method flow chart of the second application method of the embodiment of the present invention.

[0052] Figure 2 In the figure, 1 is a round indicator light; 2 is a square indicator light; 3 is a housing; 4 is a base; 5 is an electrical connector;

[0053] Figure 3 In the figure, 51 is a voltage positive input terminal, 52 is a first communication interface, 53 is a voltage positive output terminal, 54 is a voltage negative output terminal, 55 is a first communication interface, and 56 is a voltage negative input terminal;

[0054] Figure 5 Among them, 11 is a green rectangular indicator light, 12 is a yellow rectangular indicator light, 13 is a red rectangular indicator light, 21 is a green circular indicator light, 22 is a yellow circular indicator light, and 23 is a red circular indicator light. DETAILED DESCRIPTION

[0055] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, the purpose of which is to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation. It should be noted that the words "first", "second" and the like described in this application are only for the convenience of describing the technical solution to distinguish different components, and are not used to limit this application. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments.

[0056] This embodiment provides a vehicle power management device, such as Figure 1 As shown, the device includes a power management circuit, which includes a voltage input module, a current sampling module, an anti-reverse connection module, a voltage stabilizing module, a control module, a temperature sampling module, an indicator light module, and a voltage output module, wherein the voltage input module is connected to the voltage output module through the current sampling module and the anti-reverse connection module in sequence; the voltage stabilizing module is connected to the voltage output module; the control module is respectively connected to the voltage input module, the current sampling module, the voltage stabilizing module, the temperature sampling module, and the indicator light module; and the control module also includes a communication interface.

[0057] The device of this embodiment also includes a housing 3, a base 4, and an electrical connector 5. Its appearance and structure are as follows: Figure 2 As shown, the housing 3 is arranged on the base 4, the power management circuit is arranged in the base 4, and the housing 3 protects the power management circuit in the base 4. The input end of the voltage input module, the output end of the voltage output module, and the communication interface are led out through the electrical connector 5 and arranged on the base 4; the indicator light module of the power management circuit is arranged on the top of the housing 3. In the embodiment, the indicator light module on the top of the housing 3 includes a round indicator light 1 and a direction indicator light 2.

[0058] In this embodiment, the electrical connectors 5 on the base 4 are distributed as follows: Figure 4 As shown, it includes a positive voltage input terminal 51, a first communication interface 52, a positive voltage output terminal 53, a negative voltage output terminal 54, a first communication interface 55, and a negative voltage input terminal 56. The overall device structure of this embodiment is simple, and adopts a direct plug-in structure such as an electrical connector to achieve quick plug-in and pull-out.

[0059] The specific structure of the power management circuit of this embodiment is as follows: Figure 4As shown, the voltage input module includes a positive input terminal, a negative input terminal, a transformer, a rectifier bridge, and a first PMOS tube, wherein the positive input terminal is connected to the negative input terminal through the primary side of the transformer, the source of the first PMOS tube, and the drain of the first PMOS tube in sequence; the gate of the first PMOS tube is connected to the control module; the secondary side of the transformer is connected to the input pin of the rectifier bridge; the first output pin of the rectifier bridge is grounded, and the second output pin is connected to the current sampling module. In the voltage input module of this embodiment, the control module can control the gate input of the first PMOS tube to achieve the connection and shutdown of the power supply. At the same time, a rectifier bridge is provided to realize AC to DC conversion, so that the device can be applied to various EEA architectures. The transformer is used to convert the input voltage into the required voltage and then supply power to the load, thereby meeting the power supply requirements of various loads.

[0060] The current sampling module of this embodiment is a sampling resistor Rs, and the control module can monitor the load current flowing through the sampling resistor Rs in real time. The temperature sampling module is a thermistor Rt, and the control module can monitor the temperature rise of the entire device in real time.

[0061] The anti-reverse connection module of this embodiment is used to ensure that the voltage of other parallel devices at the voltage output end will not be reversely injected into the device when there is no input at the voltage input end, thereby protecting the device from damage. Specifically, it includes a second PMOS tube, a first P-type transistor, a second P-type transistor, a first resistor, and a second resistor, wherein the drain of the second PMOS tube is connected to the current sampling module and the lead-out terminal is connected to the emitter of the first P-type transistor; the collector of the first P-type transistor is grounded through the first resistor; the base of the first P-type transistor is connected to the collector of the first P-type transistor and the lead-out terminal is connected to the base of the second P-type transistor; the gate of the second PMOS tube is connected to the collector of the second P-type transistor and the lead-out terminal is grounded through the second resistor; the source of the second PMOS tube is connected to the emitter of the second P-type transistor and the lead-out terminal is connected to the voltage output module.

[0062] In the anti-reverse connection module of this embodiment, the dual triodes constitute a mirror ratio circuit, and the emitters of the two triodes are used as input terminals to detect the output voltage of the voltage input module and the input voltage of the voltage output module respectively. When the output voltage of the voltage input module is higher than the input voltage of the voltage output module, the first P-type triode is saturated and turned on, the second P-type triode is turned off, and the collector of the second P-type triode is pulled to the ground by the second resistor. Because the gate of the second PMOS tube is also connected to the collector of the second PMOS tube, the gate of the second PMOS tube is pulled to the ground and turned on. On the contrary, if the output voltage of the voltage input module is lower than the input voltage of the voltage output module, the second P-type triode is saturated and turned on, and the gate of the second PMOS tube is pulled up and turned off, thereby realizing the anti-current backflow function. In addition, because the PMOS tube is used, the PMOS tube can only be turned on when the gate voltage is low relative to the source voltage, so the power reverse connection protection function is also realized.

[0063] The voltage output module of this embodiment includes a positive output terminal and a negative output terminal. The positive output terminal is connected to the anti-reverse connection module and the voltage stabilizing module respectively, and the negative output terminal is grounded.

[0064] The device of this embodiment also includes an energy storage battery B. The control module is connected to the voltage stabilizing module and the lead-out terminal is connected to the positive electrode of the energy storage battery B; the negative electrode of the energy storage battery B is grounded. The energy storage battery B can supply power to the control module. When it is not plugged into the socket, the control module does not detect the voltage at the positive input terminal and the negative input terminal and will enter a dormant state. At this time, the capacity of the energy storage battery B can support continuous dormancy. During normal operation, the energy storage battery B can be charged through the voltage at the positive output terminal and the negative output terminal.

[0065] The voltage stabilizing module is a common method used by those skilled in the art, and this embodiment will not be described in detail. In this embodiment, one end of the voltage stabilizing module is connected to the positive output terminal, one end is grounded, and it is also connected to the control module to stabilize the output voltage of the voltage output module according to the control signal of the control module.

[0066] In order to prevent the voltage of the energy storage battery B from affecting the voltage output module through the voltage stabilizing module, the voltage stabilizing module is connected to the voltage output module through a reverse diode to prevent current reverse flow, thereby protecting the circuit.

[0067] The control module of this embodiment can adopt control chips such as CPU and MCU, which have the advantages of small size, high integration and strong scalability. During specific implementation, it can also be flexibly selected according to actual conditions. The device of this embodiment can communicate with external power supply equipment through the communication interface of the control module. For example, when plugged into the socket, the socket motherboard will send the data of the startup voltage and current to the device of this embodiment. After receiving this data, the control module sets the voltage and current parameters according to this data. At the same time, when the control module works normally, the monitored load current, voltage input terminal voltage, and voltage output terminal voltage can be synchronized to the socket motherboard. If there is any abnormality, it will communicate with the motherboard and display the fault.

[0068] During application, the device of this embodiment is usually set up redundantly, that is, two identical devices are used at the same time. Both devices communicate with the external power supply device through the communication interface of their respective control modules. The external power supply device controls one of them to start working and the other to sleep. When the enabled device fails, the dormant device is immediately started to realize the redundancy function.

[0069] The indicator light module of this embodiment includes a first indicator light, a second indicator light, a third indicator light, a fourth indicator light, a fifth indicator light, and a sixth indicator light. According to the control signal of the control module, different indicator light states indicate different device working states, specifically including:

[0070] The first indicator light, the second indicator light, and the third indicator light are all off, indicating that the device is in a stopped working state;

[0071] The first indicator light goes out, the second indicator light goes out, and the third indicator light turns on, indicating a high voltage input overvoltage fault;

[0072] The first indicator light is off, the second indicator light is on, and the third indicator light is off, indicating a high voltage input undervoltage fault;

[0073] The first indicator light is off, the second indicator light is on, and the third indicator light is on, indicating that the high voltage input power supply is faulty;

[0074] The first indicator light is on, the second indicator light is off, and the third indicator light is off, indicating that the device is in an independent working state;

[0075] The first indicator light is on, the second indicator light is off, and the third indicator light is on, indicating that the device is in full power working state;

[0076] The first indicator light is on, the second indicator light is on, and the third indicator light is off, indicating that the device and its redundant device are working together;

[0077] The first indicator light, the second indicator light, and the third indicator light are all on and remain on for a preset time (set to 3 seconds in this embodiment), indicating that the device has started working and passed the self-test;

[0078] The first indicator light is on, the second indicator light flashes, and the third indicator light flashes, indicating that the device and its redundant device are working together and the device is in full power state;

[0079] The fourth indicator light, the fifth indicator light, and the sixth indicator light are all off, indicating that the device is in a stopped working state;

[0080] The fourth indicator light goes out, the fifth indicator light goes out, and the sixth indicator light turns on, indicating that the device outputs an overvoltage fault;

[0081] The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device output is undervoltage fault;

[0082] The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is on, indicating that the device output is faulty;

[0083] The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is off, indicating that the device is in an independent working state;

[0084] The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is on, indicating that the load at the output end of the device is short-circuited;

[0085] The fourth indicator light is on, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device is in full load output state;

[0086] The fourth indicator light, the fifth indicator light, and the sixth indicator light are all lit and remain on for a preset time (set to 3 seconds in this embodiment), indicating that the device starts working and passes the self-test.

[0087] In this embodiment, if Figure 5 As shown, the first indicator light, the second indicator light, and the third indicator light correspond to a green rectangular indicator light 11, a yellow rectangular indicator light 12, and a red rectangular indicator light 13, respectively; the fourth indicator light, the fifth indicator light, and the sixth indicator light correspond to a green circular indicator light 21, a yellow circular indicator light 22, and a red circular indicator light 23, respectively. The working state of the device can be intuitively determined by the states of the six indicator lights on the top of the housing.

[0088] Based on the above-mentioned automobile power management device, this embodiment correspondingly proposes an application method 1, which can not only ensure the normal power supply of the load, but also avoid the misjudgment and power failure caused by instantaneous overload, which is beneficial to protect the safety of the power supply function of the load. Figure 6 As shown, the method comprises the following steps:

[0089] Step S1, when the device is powered normally, the control module monitors the load current through the current sampling module. After a delay (the delay time can be flexibly set according to the actual situation), the current load current is collected and compared with the preset overload current threshold to determine whether the load current is normal. If the current load current is greater than the preset overload current threshold, it is considered to be overloaded and the load current is abnormal. Otherwise, it indicates that the load current is abnormal. If the load current is normal, continue to monitor the current;

[0090] Step S2: If the load current is abnormal, i.e., overloaded, the current load current is compared with the maximum value in the preset current MAP to determine whether the current load current is a peak current. If it is not a peak current, the device maintains normal power supply; the current MAP is calibrated in advance through a large amount of experimental data to represent the load current characteristics of the device, including the instantaneous peak value of the current in a very short time, i.e., the peak current.

[0091] Step S3: If it is a peak current, compare the current load current with the preset short-circuit critical current value to determine whether there is a short-circuit risk. If the current load current is greater than or equal to the preset short-circuit critical current value, it is considered that there is a short-circuit risk; otherwise, there is no short-circuit risk. If there is no short-circuit risk, the device maintains normal power supply;

[0092] Step S4: If there is a short circuit risk, the device will limit the power output; similarly, after a delay, the current load current is collected again and the number of collections is recorded plus one, and then steps S1 to S3 are repeated;

[0093] Step S5: After the number of acquisitions reaches a preset number, if the current device still has a short circuit risk, the device is powered off, which not only protects the line but also ensures that the load is not misjudged due to a peak current state; otherwise, the device is powered normally.

[0094] This embodiment also proposes a second application method, the principle of which is: when the load power exceeds the power supply power of the device, the device will not be powered off directly, but will first supply power at full load, and then request the redundant module to be connected in parallel. When the parallel connection is successful, the two modules supply power at the same time, thereby increasing the power demand of the load. Figure 7 As shown, the method comprises the following steps:

[0095] Step T1: When the device is powered normally, the control module monitors the output power of the device; the output power can be converted by the control module through monitoring the load current.

[0096] Step T2: when it is detected that the device is in full-load working state, the control module controls the device to maintain the full-power working state and records the holding time;

[0097] Step T3: Determine whether the holding time reaches the preset time threshold (which can be flexibly set according to actual conditions). If not, continue to work at full power; otherwise, the control module requests the external power supply device to ask the redundant device of the current device to join the parallel connection. Upon receiving the request, the external power supply device will issue an instruction to the redundant device to make it participate in the parallel operation to relieve the load supply of the original device. After the parallel connection is successful, the current device and its redundant device jointly supply power to the load;

[0098] Step T4: If the parallel connection fails, the temperature rise of the current device is further detected in real time through the temperature sampling module; if the temperature rise of the device exceeds the preset temperature difference, the device will continue to request parallel connection after limiting the power supply output, otherwise repeat steps T2 to T4.

[0099] The invention is essentially an improved controllable DCDC converter, which integrates load current monitoring and overload protection functions, supports communication mode with external power supply equipment, can be flexibly configured for redundancy or parallel use, reduces the use of wiring harnesses, and reduces the copper consumption of the entire vehicle.

[0100] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automotive power management device, characterized in that: The device includes a power management circuit, which includes a voltage input module, a current sampling module, an anti-reverse connection module, a voltage stabilizing module, a control module, a temperature sampling module, an indicator light module, and a voltage output module, wherein the voltage input module is connected to the voltage output module through the current sampling module and the anti-reverse connection module in sequence; the voltage stabilizing module is connected to the voltage output module; the control module is respectively connected to the voltage input module, the current sampling module, the voltage stabilizing module, the temperature sampling module, and the indicator light module; and the control module also includes a communication interface.

2. The automotive power management device according to claim 1, characterized in that: The voltage input module includes a positive input terminal, a negative input terminal, a transformer, a rectifier bridge, and a first PMOS tube, wherein the positive input terminal is connected to the negative input terminal through the primary side of the transformer, the source of the first PMOS tube, and the drain of the first PMOS tube in sequence; the gate of the first PMOS tube is connected to the control module; the secondary side of the transformer is connected to the input pin of the rectifier bridge; the first output pin of the rectifier bridge is grounded, and the second output pin is connected to the current sampling module.

3. The automotive power management device according to claim 1, characterized in that: The anti-reverse connection module includes a second PMOS tube, a first P-type transistor, a second P-type transistor, a first resistor, and a second resistor, wherein the drain of the second PMOS tube is connected to the current sampling module and the lead-out terminal is connected to the emitter of the first P-type transistor; the collector of the first P-type transistor is grounded through the first resistor; the base of the first P-type transistor is connected to the collector of the first P-type transistor and the lead-out terminal is connected to the base of the second P-type transistor; the gate of the second PMOS tube is connected to the collector of the second P-type transistor and the lead-out terminal is grounded through the second resistor; the source of the second PMOS tube is connected to the emitter of the second P-type transistor and the lead-out terminal is connected to the voltage output module.

4. The automotive power management device according to claim 1, characterized in that: The device also includes an energy storage battery. The control module is connected to the voltage stabilizing module and the lead-out terminal is connected to the positive electrode of the energy storage battery. The negative electrode of the energy storage battery is grounded.

5. The automotive power management device according to claim 4, characterized in that: The voltage stabilizing module is connected to the voltage output module via a reverse diode.

6. The automotive power management device according to claim 1, characterized in that: The device is redundantly configured to communicate with external power supply equipment via the communication interface of the control module.

7. The automotive power management device according to claim 1, characterized in that: The indicator light module includes a first indicator light, a second indicator light, a third indicator light, a fourth indicator light, a fifth indicator light, and a sixth indicator light. According to the control signal of the control module, different device working states are indicated by different indicator light states, including: The first indicator light, the second indicator light, and the third indicator light are all off, indicating that the device is in a stopped working state; The first indicator light goes out, the second indicator light goes out, and the third indicator light turns on, indicating a high voltage input overvoltage fault; The first indicator light is off, the second indicator light is on, and the third indicator light is off, indicating a high voltage input undervoltage fault; The first indicator light is off, the second indicator light is on, and the third indicator light is on, indicating that the high voltage input power supply is faulty; The first indicator light is on, the second indicator light is off, and the third indicator light is off, indicating that the device is in an independent working state; The first indicator light is on, the second indicator light is off, and the third indicator light is on, indicating that the device is in full power working state; The first indicator light is on, the second indicator light is on, and the third indicator light is off, indicating that the device and its redundant device are working together; The first indicator light, the second indicator light, and the third indicator light all light up and remain on for a preset time, indicating that the device has started to work and passed the self-test; The first indicator light is on, the second indicator light flashes, and the third indicator light flashes, indicating that the device and its redundant device are working together and the device is in full power state; The fourth indicator light, the fifth indicator light, and the sixth indicator light are all off, indicating that the device is in a stopped working state; The fourth indicator light goes out, the fifth indicator light goes out, and the sixth indicator light turns on, indicating that the device outputs an overvoltage fault; The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device output is undervoltage fault; The fourth indicator light is off, the fifth indicator light is on, and the sixth indicator light is on, indicating that the device output is faulty; The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is off, indicating that the device is in an independent working state; The fourth indicator light is on, the fifth indicator light is off, and the sixth indicator light is on, indicating that the load at the output end of the device is short-circuited; The fourth indicator light is on, the fifth indicator light is on, and the sixth indicator light is off, indicating that the device is in full load output state; The fourth indicator light, the fifth indicator light, and the sixth indicator light all light up and remain on for a preset time, indicating that the device has started working and passed the self-test.

8. An automobile power management device according to any one of claims 1 to 7, characterized in that: The device also includes a shell, a base, and an electrical connector, wherein the shell is arranged on the base; the power management circuit is arranged in the base, the input end of the voltage input module, the output end of the voltage output module, and the communication interface are led out through the electrical connector and arranged on the base; and the indicator light module of the power management circuit is arranged on the top of the shell.

9. An application method of an automobile power management device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step S1, when the device is powered normally, the control module monitors the load current through the current sampling module. After a delay, the current load current is collected and compared with the preset overload current threshold to determine whether the load current is normal. If the load current is normal, the current monitoring continues; Step S2: If the load current is abnormal, i.e., overloaded, the current load current is compared with the maximum value in the preset current MAP to determine whether the current load current is a peak current. If it is not a peak current, the device maintains normal power supply; Step S3: If it is a peak current, compare the current load current with the preset short-circuit critical current value to determine whether there is a short-circuit risk. If there is no short-circuit risk, the device maintains normal power supply; Step S4: If there is a short circuit risk, the device will limit the power output; similarly, after a delay, the current load current is collected again and the number of collections is recorded plus one, and then steps S1 to S3 are repeated; Step S5: After the number of acquisitions reaches a preset number, if the current device still has a short circuit risk, the device is powered off; otherwise, the device is powered normally.

10. An application method of an automobile power management device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step T1: When the device is powered normally, the control module monitors the output power of the device; Step T2: when it is detected that the device is in full-load working state, the control module controls the device to maintain the full-power working state and records the holding time; Step T3, when judging whether the holding time reaches the preset time threshold, if not, continue to maintain full power operation; otherwise, the control module requests the external power supply device to connect the redundant device of the current device in parallel, and after the parallel connection is successful, the current device and its redundant device jointly supply power to the load; Step T4: If the parallel connection fails, the temperature rise of the current device is further detected in real time through the temperature sampling module; if the temperature rise of the device exceeds the preset temperature difference, the device will continue to request parallel connection after limiting the power supply output, otherwise repeat steps T2 to T4.

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