A low voltage power management system

Abstract

The application discloses a low-voltage power management system, and belongs to the technical field of automobile power management, which comprises a voltage transformation control module connected with a starting energy storage module, a standby energy storage module and a power battery respectively, and is used for converting high voltage of the power battery into low voltage to supply power to the starting energy storage module and the standby energy storage module; the starting energy storage module is used for providing electric energy for a vehicle controller and a low-voltage load; the standby energy storage module is used for supplying power for the low-voltage load when the starting energy storage module is insufficient in electric quantity; an energy storage monitoring module is connected with the starting energy storage module and is used for monitoring the state of the starting energy storage module to obtain first state data; and a power control module is used for controlling power distribution of the vehicle controller and the low-voltage load according to the first state data. The application can avoid the problem that a vehicle cannot be started due to power loss of a single power supply by adding a redundant power supply circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile power management, in particular to a low-voltage power management system. BACKGROUND

[0002] As the main type of new energy vehicles, hybrid and pure electric vehicles are playing an increasingly important role in the market. However, there are some problems in the low-voltage power management of such vehicles, especially the problem of low-voltage battery depletion, which directly affects the normal use of the vehicle and the satisfaction of the user.

[0003] Currently, most hybrid and pure electric vehicles use a power architecture scheme of starting-type lead-acid batteries plus intelligent power compensation; this scheme monitors the state of charge (SOC) of the low-voltage battery through an intelligent battery sensor (IBS) and requests high-voltage power from the power battery when the SOC value is lower than the set value, and then compensates the low-voltage battery through DC / DC. However, due to the limitations of the depth of discharge and the number of compensation times of the battery, the vehicle is still prone to depletion problems after a long period of parking. At the same time, the battery capacity is not fully utilized, reducing the service life and efficiency of the battery. For vehicles that wake up abnormally, if the number of intelligent compensation times is used up, the low-voltage battery will still be depleted, ultimately resulting in the vehicle being unable to start. SUMMARY

[0004] To solve the above problems, the present application provides a low-voltage power management system, which can avoid the problem of vehicle unable to start due to depletion of a single power supply by adding a redundant power supply circuit.

[0005] The above-mentioned object can be achieved by the following scheme:

[0006] A low-voltage power management system, comprising a starting energy storage module, a backup energy storage module, a voltage control module, a power control module, and an energy storage monitoring module; wherein the voltage control module is connected to the starting energy storage module, the backup energy storage module, and a power battery, and is used to convert high-voltage from the power battery into low-voltage to compensate the starting energy storage module and the backup energy storage module; the starting energy storage module is used to provide power for a vehicle controller and low-voltage loads; the backup energy storage module is used to provide power for the low-voltage loads when the starting energy storage module is insufficient; the energy storage monitoring module is connected to the starting energy storage module and is used to monitor the state of the starting energy storage module to obtain first state data; and the power control module is used to control the power distribution of the vehicle controller and the low-voltage loads according to the first state data.

[0007] Optionally, the system further comprises a backup monitoring module; wherein the backup monitoring module is connected to the backup energy storage module and is used to monitor the state of the backup energy storage module to obtain second state data.

[0008] Optionally, the system further comprises a communication transmission module, the communication transmission module comprises a vehicle terminal, a vehicle networking service platform and a mobile terminal; wherein the starting energy storage module is connected with the vehicle terminal, and is configured to supply power for the vehicle terminal; the vehicle terminal is connected with the energy storage monitoring module and the backup monitoring module respectively, and is configured to receive the first state data and the second state data, and generate a corresponding early warning signal according to the first state data and the second state data; the vehicle networking service platform is in communication connection with the vehicle terminal, and is configured to receive the early warning signal sent by the vehicle terminal; the mobile terminal is in communication connection with the vehicle networking service platform, and is configured to receive the early warning signal sent by the vehicle networking service platform.

[0009] Optionally, the receiving the first state data and the second state data, and generating a corresponding early warning signal according to the first state data and the second state data comprises: receiving the first state data, and judging whether the SOC value of the starting energy storage module is less than a preset first threshold according to the first state data; if yes, generating a low power early warning signal and sending it to the vehicle networking service platform.

[0010] Optionally, the power supply control module comprises a first power supply controller and a second power supply controller; wherein one end of the first power supply controller is connected with the voltage transformation control module, the backup energy storage module and the low-voltage load respectively, the other end of the first power supply controller is connected with one end of the second power supply controller, the vehicle terminal, the vehicle controller and the safety load respectively; the other end of the second power supply controller is connected with the starting energy storage module; the energy storage monitoring module is in communication connection with the first power supply controller and the second power supply controller respectively.

[0011] Based on the same inventive concept, the application further provides a low-voltage power management method, the method comprising: the first power supply controller judging whether the SOC value of the starting energy storage module is less than a preset second threshold according to the first state data; if yes, the first power supply controller disconnecting the low-voltage load from the starting energy storage module; the backup energy storage module supplying power for the low-voltage load.

[0012] Optionally, the method further comprises: the vehicle controller judging whether the SOC value of the starting energy storage module is less than a preset third threshold according to the first state data; if yes, the vehicle controller performing intelligent power compensation for the starting energy storage module; the vehicle controller judging whether the SOC value of the backup energy storage module is less than a preset fourth threshold according to the second state data; if yes, the vehicle controller performing intelligent power compensation for the backup energy storage module; wherein when the SOC value of the starting energy storage module is greater than or equal to a preset fifth threshold, the power compensation is stopped.

[0013] Optionally, the method further comprises: when the number of times of intelligent power compensation is used up, judging whether the SOC value of the standby energy storage module is greater than the fourth threshold value according to the second state data; if not, judging whether the SOC value of the standby energy storage module is greater than a preset sixth threshold value; if the SOC value of the standby energy storage module is greater than the sixth threshold value, generating an abnormal power consumption warning signal and sending it to the vehicle networking service platform; the mobile terminal prompts the user to control the vehicle to enter a high-voltage state through the mobile terminal within a first preset time according to the abnormal power consumption warning signal sent by the vehicle networking service platform.

[0014] Optionally, the judgment of whether the SOC value of the standby energy storage module is greater than the preset sixth threshold value comprises: if the SOC value of the standby energy storage module is less than or equal to the sixth threshold value, obtaining the SOC value of the power battery and judging whether the SOC value of the power battery is less than a preset seventh threshold value; if yes, generating a first control request of powering off after entering the high-voltage state once and reminding the user to charge the power battery in time through the mobile terminal; if not, calculating the duration of keeping the high-voltage state according to the SOC value of the power battery and generating a second control request of powering off after keeping the high-voltage state for the duration; wherein, according to the SOC values of the starting energy storage module and the standby energy storage module, the user is reminded to unlock and power off through the mobile terminal to restore the sleep state of the vehicle.

[0015] Optionally, the reminding of the user to unlock and power off through the mobile terminal comprises: when the vehicle is unlocked and powered off, obtaining the static current value within a third preset time by using the energy storage monitoring module and the standby monitoring module; judging whether the static current value is greater than a preset eighth threshold value; if yes, reminding the user to check through the mobile terminal.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The present application ensures that the standby energy storage module can supply power to the low-voltage load in time when the starting energy storage module is insufficient, avoiding the problem that the vehicle cannot start due to the power loss of a single power supply. This design not only improves the reliability of the power supply, but also meets the needs of advanced intelligent driving.

[0018] 2. The present application monitors the SOC values of the starting energy storage module and the standby energy storage module in real time through the energy storage monitoring module, and automatically triggers the intelligent power compensation function when the SOC value is lower than the preset threshold value, ensuring sufficient battery power. At the same time, the system also has a low power warning function, which sends a warning signal to the user in time through the vehicle networking service platform and the mobile terminal when the battery power is insufficient, reminding the user to charge or take appropriate measures.

[0019] 3. The backup energy storage module can use stationary lead-acid batteries, supporting 0-100% SOC charge-discharge cycles. Compared to traditional starting batteries, its battery capacity is utilized more fully. This not only improves battery lifespan but also reduces user maintenance costs.

[0020] 4. Users can remotely control the vehicle to enter a high-voltage state or perform other operations via mobile terminal, avoiding power loss caused by abnormal vehicle wake-up; at the same time, the system also has a static current monitoring function. When the vehicle is unlocked and powered off, if the static current value is too high, the system will remind the user to check via mobile terminal to ensure the safety and stability of the vehicle.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a low-voltage power management system according to an embodiment of the present invention.

[0024] Figure 2 This is a flowchart illustrating the low-voltage power supply management method with a number of power replenishment cycles according to an embodiment of the present invention.

[0025] Figure 3 This is a flowchart illustrating the low-voltage power management method in an embodiment of the present invention when there are no additional power replenishment cycles. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Reference Figure 1An embodiment of the present application provides a low-voltage power management system, which can avoid the problem that a vehicle cannot be started due to power shortage of a single power supply by adding a redundant power supply circuit.

[0028] The system of the embodiment specifically comprises a starting energy storage module, a backup energy storage module, a voltage conversion control module, a power supply control module and an energy storage monitoring module.

[0029] The voltage conversion control module is connected with the starting energy storage module, the backup energy storage module and a power battery respectively, and is used for converting high voltage of the power battery into low voltage to supply power to the starting energy storage module and the backup energy storage module.

[0030] Specifically, the voltage conversion control module can be a DC / DC controller, which converts high voltage of the power battery into low voltage to supply power to the starting energy storage module and the backup energy storage module, so that the energy storage module can be timely supplemented when the power is insufficient, thereby maintaining normal operation of the vehicle.

[0031] The starting energy storage module is used for providing power for a vehicle controller and low-voltage loads.

[0032] Specifically, the starting energy storage module can be a starting type lead-acid storage battery, which is a main source of low-voltage power of the vehicle and is responsible for supplying power for the vehicle controller and the low-voltage loads, wherein the vehicle controller can be a power battery management system (BMS), a VCU or the like.

[0033] The backup energy storage module is used for supplying power for the low-voltage loads when the power of the starting energy storage module is insufficient.

[0034] Specifically, the backup energy storage module adopts a fixed type lead-acid storage battery, supports 0% to 100% SOC charge-discharge cycle, and compared with a traditional starting type storage battery, the battery capacity is more fully utilized, which not only improves the service life of the storage battery, but also reduces the maintenance cost of the user.

[0035] The energy storage monitoring module is connected with the starting energy storage module and is used for monitoring a state of the starting energy storage module to obtain first state data.

[0036] Specifically, the energy storage monitoring module can be a storage battery sensor, which obtains the first state data by monitoring the state of the starting energy storage module, and the first state data can include power (SOC value), temperature, current and health status (SOH) of the starting energy storage module, thereby providing a decision basis for the power supply control module.

[0037] The power supply control module is used for controlling power distribution of the vehicle controller and the low-voltage loads according to the first state data.

[0038] Specifically, the power supply control module includes a first power supply controller and a second power supply controller; the first power supply controller and the second power supply controller can be low-power power supply controllers; the power supply control module can control the on-off of the first power supply controller and the second power supply controller according to the power level of the starting energy storage module, intelligently adjust the power distribution strategy, and ensure the stable operation of the low-voltage system of the vehicle and prolong the service life of the energy storage module.

[0039] Specifically, through the cooperative work of the above modules, the low-voltage power supply management system provided by the application can effectively improve the low-voltage power supply capability of the vehicle in the OFF state, reduce the risk of power loss of the vehicle, and prolong the service life of the storage battery; at the same time, the system can also meet the needs of advanced intelligent driving, improve the satisfaction and safety of users.

[0040] Optionally, the system further comprises a backup monitoring module; wherein,

[0041] The backup monitoring module is connected with the backup energy storage module and is used for monitoring the state of the backup energy storage module to obtain second state data.

[0042] Specifically, the backup monitoring module can be a storage battery sensor, which obtains second state data by monitoring the state of the backup energy storage module; the second state data can include the power level (SOC value), temperature, current and health status (SOH) of the backup energy storage module, etc., providing decision basis for intelligent power compensation.

[0043] Optionally, the system further comprises a communication transmission module, which includes a vehicle-mounted terminal, a vehicle networking service platform and a mobile terminal; wherein,

[0044] The starting energy storage module is connected with the vehicle-mounted terminal and is used for supplying power to the vehicle-mounted terminal;

[0045] The vehicle-mounted terminal is connected with the energy storage monitoring module and the backup monitoring module respectively, is used for receiving the first state data and the second state data, and generates corresponding warning signals according to the first state data and the second state data;

[0046] Specifically, the vehicle-mounted terminal can be a vehicle-mounted intelligent communication terminal (TBOX), which is a crucial part of the vehicle networking system and is mainly responsible for data communication and information interaction between the vehicle and the vehicle networking service platform; the TBOX integrates various communication technologies, such as mobile communication (such as 4G / 5G), Bluetooth, Wi-Fi, etc., to realize the comprehensive connection between the vehicle and the outside world.

[0047] The vehicle networking service platform is in communication connection with the vehicle-mounted terminal and is used for receiving the warning signals sent by the vehicle-mounted terminal;

[0048] Specifically, the Internet of Vehicles service platform can be a TSP platform, which is a cloud system for centralized processing and management of data from multiple vehicle terminals; the TSP platform receives the early warning signals sent by the vehicle terminal and performs further analysis and processing; the TSP platform communicates with the mobile terminal (such as a smart phone, a tablet computer, etc.) through the Internet, and pushes the early warning signals or other important information to the user.

[0049] The mobile terminal is in communication connection with the Internet of Vehicles service platform, and is configured to receive the early warning signals sent by the Internet of Vehicles service platform.

[0050] Specifically, the mobile terminal can be a smart phone or a tablet computer, and the user receives information from the Internet of Vehicles service platform by using the mobile terminal; the user can access the information by installing a corresponding application program.

[0051] Optionally, the receiving of the first state data and the second state data and the generating of the corresponding early warning signal according to the first state data and the second state data comprise:

[0052] The first state data is received, and it is judged according to the first state data whether the SOC value of the starting energy storage module is less than a preset first threshold value.

[0053] If yes, a low power early warning signal is generated and sent to the Internet of Vehicles service platform.

[0054] Specifically, the battery power in the range of 60% to 85% is a normal working range, and the first threshold value can be 65%; the starting battery sensor, i.e. the energy storage monitoring module, collects the SOC value of the starting energy storage module, i.e. the starting battery; when the SOC value of the starting battery is less than 65%, the vehicle terminal generates a low power early warning signal and sends it to the TSP platform; the TSP platform pushes the low power early warning signal to the user through the mobile terminal, for example, a low power prompt can be sent to the owner through the mobile phone APP.

[0055] Optionally, the power control module comprises a first power controller and a second power controller; wherein,

[0056] One end of the first power controller is connected with the voltage transformation control module, the standby energy storage module and the low-voltage load, respectively; the other end of the first power controller is connected with one end of the second power controller, the vehicle terminal, the vehicle controller and the safety load, respectively; the other end of the second power controller is connected with the starting energy storage module;

[0057] The energy storage monitoring module is in communication connection with the first power controller and the second power controller, respectively.

[0058] Based on the same inventive concept, the application further provides a low-voltage power management method applied to the low-voltage power management system as described above, the method comprising:

[0059] The first power controller determines whether the SOC value of the starting energy storage module is less than a preset second threshold according to the first state data.

[0060] If yes, the first power controller disconnects the low-voltage load from the starting energy storage module.

[0061] The standby energy storage module supplies power to the low-voltage load.

[0062] For example, as shown in Figure 2 The SOC value of the starting energy storage module, i.e. the starting battery, is obtained through the first state data, and it is determined whether the SOC value is less than the second threshold, which can be 60%. When the SOC value of the starting battery is less than 60%, the first power controller disconnects the starting battery from the low-voltage load, while the first power controller remains connected, so that the starting battery can supply power to the vehicle controller and the safety load, thereby retaining the unlock and functional safety loop. At this time, the second power controller controls the starting battery to output a current less than 10 mA, thereby reducing the risk of power loss of the starting battery. At this time, the low-voltage load is supplied with power by the standby energy storage module, i.e. the fixed battery.

[0063] Optionally, the method further comprises:

[0064] The vehicle controller determines whether the SOC value of the starting energy storage module is less than a preset third threshold according to the first state data.

[0065] If yes, the vehicle controller intelligently charges the starting energy storage module.

[0066] The vehicle controller determines whether the SOC value of the standby energy storage module is less than a preset fourth threshold according to the second state data.

[0067] If yes, the standby energy storage module is intelligently charged.

[0068] When the SOC value of the starting energy storage module is greater than or equal to a preset fifth threshold, the charging is stopped.

[0069] For example, as shown in Figure 2As shown, the third threshold value can be 50%, when the SOC value of the starting energy storage module, i.e., the starting battery, is less than the third threshold value, i.e., 50%, the vehicle controller will intelligently charge the starting battery; the fifth threshold value can be 85%, when the SOC value of the starting battery reaches the fifth threshold value, i.e., 85%, the intelligent charging operation is stopped; the fourth threshold value can be 30%, when the SOC value of the standby energy storage module, i.e., the fixed battery, is less than the fourth threshold value, i.e., 30%, the vehicle controller will intelligently charge the fixed battery.

[0070] Optionally, the method further comprises:

[0071] When the number of intelligent charging is used up, it is determined according to the second state data whether the SOC value of the standby energy storage module is greater than the fourth threshold value;

[0072] If not, it is determined whether the SOC value of the standby energy storage module is greater than a preset sixth threshold value;

[0073] If the SOC value of the standby energy storage module is greater than the sixth threshold value, an abnormal power consumption warning signal is generated and sent to the vehicle networking service platform;

[0074] The mobile terminal prompts the user to control the vehicle to enter a high-pressure state through the mobile terminal within a first preset time according to the abnormal power consumption warning signal sent by the vehicle networking service platform.

[0075] Exemplarily, as shown, Figure 3 The fourth threshold value can be 30%, the sixth threshold value can be 20%, and the first preset time can be 5 minutes; when the number of intelligent charging reaches the upper limit, the SOC value of the standby energy storage module, i.e., the fixed battery, is obtained through the second state data, it is determined whether the SOC value of the fixed battery is greater than the fourth threshold value, i.e., 30%, if the SOC value of the fixed battery is greater than 30%, no action is triggered; when the SOC value of the fixed battery is less than or equal to 30% and greater than the sixth threshold value, i.e., 20%, the vehicle terminal generates an abnormal power consumption warning signal and sends it to the vehicle networking service platform, i.e., the TSP platform, the TSP platform sends the abnormal power consumption warning signal to the mobile terminal, such as a mobile phone, the mobile phone can push the warning signal through the APP to prompt the user to control the vehicle to enter a high-pressure state through the mobile phone APP within a first preset time, i.e., 5 minutes.

[0076] Optionally, the determination of whether the SOC value of the standby energy storage module is greater than a preset sixth threshold value comprises:

[0077] If the SOC value of the standby energy storage module is less than or equal to the sixth threshold value, the SOC value of the power battery is obtained, and it is determined whether the SOC value of the power battery is less than a preset seventh threshold value;

[0078] If yes, a first control request is generated to power off after a second preset time after the vehicle executes high voltage once, and the user is reminded by the mobile terminal to charge the power battery in time;

[0079] If no, the duration of maintaining high voltage is calculated according to the SOC value of the power battery, and a second control request is generated to power off after the duration of maintaining high voltage;

[0080] According to the SOC values of the starting energy storage module and the standby energy storage module, the user is reminded by the mobile terminal to unlock and power off to restore the sleep state of the vehicle.

[0081] As shown in the example, Figure 3 The sixth threshold value can be 20%, the second preset time can be 5 minutes, and the seventh threshold value can be the lower limit of the SOC value of the vehicle power battery, for example, 10%. When the SOC value of the standby energy storage module, i.e., the fixed-type storage battery, is less than or equal to the sixth threshold value, i.e., 20%, the SOC value of the power battery is then judged. When the SOC value of the power battery is less than the seventh threshold value, i.e., 10%, the vehicle terminal generates a first control request, and the user is reminded by the APP of the mobile terminal, such as a mobile phone, to charge the power battery in time and pushes the first control request. At this time, if the user agrees to the first control request, the vehicle terminal will power off after the vehicle executes high voltage once and the second preset time, i.e., 5 minutes, according to the first control request. When the SOC value of the fixed-type storage battery is less than or equal to the sixth threshold value, i.e., 20%, and the SOC value of the power battery is greater than or equal to the seventh threshold value, i.e., 10%, the vehicle terminal generates a second control request and pushes the second control request by the APP of the mobile terminal, such as a mobile phone. At this time, if the user agrees to the second control request, the vehicle terminal will calculate the duration of maintaining high voltage, for example, 10 minutes, according to the second control request, using the SOC value of the power battery, and power off after maintaining high voltage for the duration, i.e., 10 minutes, after the vehicle executes high voltage. When the SOC values of the starting energy storage module, i.e., the starting-type storage battery, and the standby energy storage module, i.e., the fixed-type storage battery, reach 100%, the user is reminded by the APP of the mobile terminal, such as a mobile phone, to unlock and power off to restore the sleep state of the vehicle.

[0082] Optionally, the reminding the user to unlock and power off by the mobile terminal comprises:

[0083] When the vehicle is unlocked and powered off, the static current value within a third preset time is obtained by the energy storage monitoring module and the standby monitoring module;

[0084] It is judged whether the static current value is greater than a preset eighth threshold value;

[0085] If yes, the user is reminded by the mobile terminal to check.

[0086] Exemplarily, the third preset time can be 30 minutes. After the vehicle is unlocked and powered off, the static current values of the starting type battery and the fixed type battery within the third preset time (30 minutes) are obtained by using the energy storage monitoring module, the starting type battery sensor and the standby monitoring module (fixed type battery sensor). It is determined whether the static current value within 30 minutes is greater than the eighth threshold value. If the static current value is greater than the eighth threshold value, it is determined that the static current value is too large. At this time, the vehicle terminal reminds the user to go to the 4S store for inspection through the APP of the mobile terminal (such as a mobile phone).

[0087] It should be noted that the electrical connection between the above-mentioned various units does not necessarily represent the direct connection of the line, and the indirect connection mode can be applied to the embodiments of the present application as long as the purpose of the present application is achieved. The above-mentioned is only an exemplary embodiment of the present application, and cannot limit the scope of the present application.

[0088] That is, any equivalent changes and modifications made according to the teachings of the present application are still within the scope of the present application. Other embodiments of the present application will be readily apparent to those skilled in the art upon considering the specification and practice of the true principles disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of the present application that follow the general principles of the present application and include common knowledge or conventional technical means in the art not disclosed by the present application.

Claims

1. A low voltage power management system, characterized by, The system comprises a starting energy storage module, a backup energy storage module, a voltage conversion control module, a power supply control module, an energy storage monitoring module and a backup monitoring module, wherein The voltage conversion control module is connected with the starting energy storage module, the backup energy storage module and the power battery respectively, and is used to convert high voltage of the power battery into low voltage to supply power to the starting energy storage module and the backup energy storage module. The starting energy storage module is used to supply power to the vehicle controller and the low-voltage load. The backup energy storage module is used to supply power to the low-voltage load when the starting energy storage module is insufficient. The energy storage monitoring module is connected with the starting energy storage module, and is used to monitor the state of the starting energy storage module to obtain first state data. The power supply control module is used to control the power distribution of the vehicle controller and the low-voltage load according to the first state data, and comprises a first power supply controller and a second power supply controller, wherein one end of the first power supply controller is connected with the voltage conversion control module, the backup energy storage module and the low-voltage load respectively, the other end of the first power supply controller is connected with one end of the second power supply controller, the vehicle terminal, the vehicle controller and the safety load respectively, the other end of the second power supply controller is connected with the starting energy storage module, and the energy storage monitoring module is in communication connection with the first power supply controller and the second power supply controller respectively. The backup monitoring module is connected with the backup energy storage module, and is used to monitor the state of the backup energy storage module to obtain second state data.

2. The low voltage power management system of claim 1, wherein, The system further comprises a communication transmission module, and the communication transmission module comprises a vehicle terminal, a vehicle networking service platform and a mobile terminal, wherein The starting energy storage module is connected with the vehicle terminal, and is used to supply power to the vehicle terminal. The vehicle terminal is connected with the energy storage monitoring module and the backup monitoring module respectively, is used to receive the first state data and the second state data, and generates a corresponding early warning signal according to the first state data and the second state data. The vehicle networking service platform is in communication connection with the vehicle terminal, and is used to receive the early warning signal sent by the vehicle terminal. The mobile terminal is in communication connection with the vehicle networking service platform, and is used to receive the early warning signal sent by the vehicle networking service platform.

3. The low voltage power management system of claim 2, wherein, The receiving of the first state data and the second state data and the generating of a corresponding early warning signal according to the first state data and the second state data comprise: The first state data is received, and it is judged according to the first state data whether the SOC value of the starting energy storage module is less than a preset first threshold value. If yes, a low-power early warning signal is generated and sent to the vehicle networking service platform.

4. A low voltage power management method applied to the low voltage power management system of any one of claims 2-3, characterized in that, The method comprises: The first power supply controller judges according to the first state data whether the SOC value of the starting energy storage module is less than a preset second threshold value. If yes, the first power supply controller disconnects the low-voltage load from the starting energy storage module. The backup energy storage module supplies power to the low-voltage load.

5. The low voltage power management method of claim 4, wherein, The method further comprises: The vehicle controller determines whether the SOC value of the starting energy storage module is less than a third preset threshold according to the first state data; If yes, the vehicle controller performs intelligent power compensation on the starting energy storage module; The vehicle controller determines whether the SOC value of the standby energy storage module is less than a fourth preset threshold according to the second state data; If yes, the vehicle controller performs intelligent power compensation on the standby energy storage module; When the SOC value of the starting energy storage module is greater than or equal to a fifth preset threshold, the power compensation is stopped.

6. The low voltage power management method of claim 5, wherein, The method further comprises: When the number of times of intelligent power compensation is used up, the vehicle controller determines whether the SOC value of the standby energy storage module is greater than the fourth threshold according to the second state data; If no, the vehicle controller determines whether the SOC value of the standby energy storage module is greater than a sixth preset threshold; If the SOC value of the standby energy storage module is greater than the sixth threshold, an abnormal power consumption warning signal is generated and sent to the vehicle networking service platform; The mobile terminal prompts the user to control the vehicle to enter a high-voltage state through the mobile terminal within a first preset time according to the abnormal power consumption warning signal sent by the vehicle networking service platform.

7. The low voltage power management method of claim 6, wherein, The determination of whether the SOC value of the standby energy storage module is greater than the sixth preset threshold comprises: If the SOC value of the standby energy storage module is less than or equal to the sixth threshold, the SOC value of the power battery is obtained, and it is determined whether the SOC value of the power battery is less than a seventh preset threshold; If yes, a first control request of performing high voltage once and then powering off after a second preset time is generated, and the user is reminded to charge the power battery in time through the mobile terminal; If no, the duration of keeping high voltage is calculated according to the SOC value of the power battery, and a second control request of keeping high voltage and then powering off after the duration is generated; According to the SOC values of the starting energy storage module and the standby energy storage module, the user is reminded to unlock and power off through the mobile terminal to restore the sleep state of the vehicle.

8. The low voltage power management method of claim 7, wherein, The reminding of the user to unlock and power off through the mobile terminal comprises: When the vehicle is unlocked and powered off, the static current value within a third preset time is obtained by using the energy storage monitoring module and the standby monitoring module; It is determined whether the static current value is greater than an eighth preset threshold; If yes, the user is reminded to check through the mobile terminal.

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