Vehicle power control device, method and vehicle

Abstract

This application discloses a vehicle power control device, method, and vehicle. The device includes a battery, multiple fault detection modules, and a power management module. The battery is connected to multiple loads of the vehicle, and the multiple loads are connected in parallel. Fault detection modules are connected in series in the path between the battery and the corresponding load. The detection terminal of the power management module is connected to the battery, and multiple output terminals of the power management module are respectively connected to the control terminals of the multiple fault detection modules. The power management module is used to acquire the battery's state of charge (SOC), and based on the SOC, when it determines that the battery is abnormally depleted, it controls the multiple fault detection modules to identify a target load among the multiple loads and cuts off the path between the battery and the target load. The target load refers to the load that causes the abnormal battery depletion. This application, through the control of the fault detection modules by the power management module, avoids continuous abnormal battery depletion, thereby improving the flexibility of vehicle power control.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a vehicle power control device, method, and vehicle. Background Technology

[0002] With the rapid development of vehicle technology, users have increasingly diverse functional requirements for vehicles, leading to a greater number of loads on vehicles. To reduce power consumption after the vehicle is powered off, most of these loads are typically shut down.

[0003] To enhance vehicle safety and intelligence, some loads, such as the vehicle's anti-theft sensor module and remote key sensor module, need to continue operating normally even after the vehicle is powered off. In other words, the vehicle still needs to supply power to some loads even after power is off.

[0004] In the above scenarios, since some loads still need to be powered after the vehicle is powered off, if the power-off time is too long, or if power continues to be used due to load failure, the vehicle's battery may become depleted, or even the vehicle's normal use may be affected by the battery being completely depleted. Therefore, the current vehicle power control is not very flexible. Summary of the Invention

[0005] This application provides a vehicle power control device, method, and vehicle, which can improve the flexibility during battery power supply. The technical solution is as follows:

[0006] In a first aspect, a vehicle power control device is provided, the device comprising a battery, multiple fault detection modules, and a power management module:

[0007] The battery is connected to multiple loads of the vehicle to provide electrical energy to the multiple loads, and the multiple loads are connected in parallel.

[0008] The plurality of fault detection modules correspond one-to-one with the plurality of loads, and the fault detection modules are connected in series in the path between the battery and the corresponding load.

[0009] The detection terminal of the power management module is connected to the battery, and the multiple output terminals of the power management module are respectively connected to the control terminals of the multiple fault detection modules.

[0010] The power management module is used to obtain the state of charge (SOC) of the battery, and when the battery is abnormally depleted based on the SOC, it controls the multiple fault detection modules to determine the target load among the multiple loads and cuts off the path between the battery and the target load. The target load refers to the load that causes the battery to be abnormally depleted.

[0011] Optionally, the fault detection module includes a multiplexer switch, and the battery has a main power supply path, a backup power supply path, and a fault diagnosis path between itself and each of the loads;

[0012] The multiplexer includes a moving contact, a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact. The moving contact is connected to the output terminal of the power management module. The first stationary contact is connected to the main power supply path of the corresponding load. The second stationary contact is connected to the backup power supply path of the corresponding load. The third stationary contact is connected to the fault diagnosis path of the corresponding load. The fourth stationary contact is left unconnected.

[0013] The power management module is used to switch the moving contact to different stationary contacts in order to determine the target load.

[0014] Optionally, the device further includes a fault clearing module;

[0015] The power supply terminal of the fault clearing module is connected to the battery, and the output terminal of the fault clearing module is connected to the third stationary contact of each of the multiplexer switches. The fault clearing module is used to clear the fault code of the load, which is the fault indication information generated after the load has a fault.

[0016] Optionally, the device further includes an automatic control switch;

[0017] The automatic control switch is connected in series in the power supply path between the battery and the plurality of loads. The automatic control switch is used to obtain the circuit voltage and disconnect the power supply path between the battery and the plurality of loads when the circuit voltage is less than a voltage threshold.

[0018] Optionally, the device further includes a safety locking switch;

[0019] The safety lock switch is connected in parallel across the automatic control switch. The safety lock switch is used to remain closed when the vehicle is powered on and open when the vehicle is powered off.

[0020] On the other hand, a method for controlling vehicle power supply using the above-mentioned device is provided, the method comprising:

[0021] The power management module obtains the SOC of the battery;

[0022] If the SOC of the battery is lower than the first SOC threshold, the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules. The target load refers to the load that causes the battery to be abnormally depleted. The first SOC threshold is used to characterize the battery being depleted.

[0023] The power management module controls the fault detection module corresponding to the target load to cut off the path between the battery and the target load.

[0024] Optionally, the fault detection module includes a multiplexer switch, and the battery has a main power supply path, a backup power supply path, and a fault diagnosis path between itself and each of the loads; the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules, including:

[0025] The power management module selects one load from the plurality of loads, controls the moving contact of the multiplexer corresponding to the load that has not been selected to remain connected to the first stationary contact, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect to the fourth stationary contact, so as to disconnect the currently selected load.

[0026] If the battery consumes power normally after disconnecting the currently selected load, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the third stationary contact, clears the fault code in the currently selected load through the fault diagnosis path of the currently selected load, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the first stationary contact, so as to reconnect the main power supply path corresponding to the currently selected load.

[0027] If the battery consumes power abnormally after the main power supply path corresponding to the currently selected load is reconnected, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the second stationary contact in order to connect the backup power supply path of the currently selected load.

[0028] If the battery still consumes power abnormally after the backup power supply path of the currently selected load is activated, the power management module determines that the currently selected load is the target load.

[0029] Optionally, before the power management module determines the target load among the plurality of loads by controlling the plurality of fault detection modules, the method further includes:

[0030] The power management module obtains the current discharge current of the battery;

[0031] If the current discharge current of the battery is greater than the current threshold, the power management module performs the step of determining the target load among the plurality of loads by controlling the plurality of fault detection modules.

[0032] Optionally, before the power management module determines the target load among the plurality of loads by controlling the plurality of fault detection modules, the method further includes:

[0033] If the SOC of the battery is greater than the second SOC threshold, the power management module performs the step of determining the target load among the multiple loads by controlling the multiple fault detection modules. The second SOC threshold is less than the first SOC threshold. The second SOC threshold is used to characterize the SOC required by the battery when the vehicle is started next time.

[0034] If the SOC of the battery is less than or equal to the second SOC threshold, the power management module disconnects the power supply path between the battery and the plurality of loads.

[0035] On the other hand, a vehicle is provided that includes the aforementioned vehicle power control device.

[0036] On the other hand, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is executed by a processor, it implements the steps of the vehicle power control method described above.

[0037] On the other hand, a computer program product containing instructions is provided, which, when executed on a computer, cause the computer to perform the steps of the vehicle power control method described above.

[0038] The technical solution provided in this application can bring at least the following beneficial effects:

[0039] A power management module is configured to detect the battery's state of charge and includes multiple fault detection modules corresponding to various loads. When the power management module determines that the battery is abnormally low on charge, it can control these fault detection modules to identify the target load causing the abnormal charge and promptly disconnect the connection between the battery and the target load. In other words, when the battery is abnormally low on charge, the power management module can quickly identify the target load causing the charge by controlling the fault detection modules. Then, by controlling the fault detection module corresponding to the target load, the connection between the battery and the target load can be severed to prevent further abnormal charge buildup. This avoids damage to the battery's lifespan and prevents the battery from being completely depleted due to continuous charge loss, which could affect the vehicle's next normal use, thus improving the flexibility of vehicle power control. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of a vehicle power control device provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of another vehicle power control device provided in an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of another vehicle power control device provided in an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of another vehicle power control device provided in an embodiment of this application;

[0045] Figure 5 This is a schematic diagram of another vehicle power control device provided in an embodiment of this application;

[0046] Figure 6 This is a flowchart of a vehicle power control method provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0048] Please refer to Figure 1 , Figure 1 This is a schematic diagram illustrating a vehicle power control device according to an exemplary embodiment. The vehicle power control device includes a battery 101, a plurality of detection modules 102, and a power management module 103.

[0049] The battery 101 is connected to multiple loads 104 of the vehicle to provide power to them, and the loads 104 are connected in parallel. Multiple fault detection modules 102 correspond one-to-one with each load 104, and are connected in series in the path between the battery 101 and the corresponding load 104. The detection terminal of the power management module 103 is connected to the battery 101, and multiple output terminals of the power management module 103 are respectively connected to the control terminals of the multiple fault detection modules 102. The power management module 103 is used to obtain the state of charge (SOC) of the battery 101, and based on the SOC, when it determines that the battery 101 is abnormally depleted, it controls the multiple fault detection modules 102 to identify the target load among the multiple loads 104 and cuts off the path between the battery 101 and the target load. The target load refers to the load 104 that causes the abnormal depletion of the battery 101.

[0050] It should be noted that, as Figure 1As shown, multiple loads 104 of the vehicle need to be connected to the battery 101 in parallel. This ensures that if any load 104 fails, the other loads 104 of the vehicle can still operate normally based on the power supply from the battery 101.

[0051] Optionally, the power management module 103 can be a vehicle's BMS (Battery Management System) module, used to monitor the battery 101, and then control the vehicle's power supply by controlling the fault detection module 102.

[0052] Optionally, the power management module 103 may include a detection unit (not shown in the figure), which is connected to the battery 101 through a detection terminal to obtain the SOC (State of Charge) of the battery 101; the power management module 103 may also include a control unit (not shown in the figure), which is connected to the control terminals of multiple fault detection modules 102 through an output terminal to control the fault detection modules 102.

[0053] The connection methods between the detection end of the power management module 103 and the battery 101, and between the output end and the fault detection module 102, can be configured according to actual usage requirements. For example, in one scenario, the detection end of the power management module 103 can be connected to the battery 101 via electrical connection, as shown by the solid line segment in the figure; the output end of the power management module 103 can be connected to the fault detection module 102 via communication connection, as shown by the dashed line segment in the figure.

[0054] In addition, the fact that the multiple output terminals of the power management module 103 are respectively connected to the control terminals of the multiple fault detection modules 102 can be understood as follows: the multiple output terminals of the power management module 103 correspond one-to-one with the multiple fault detection modules 102, different output terminals correspond to different fault detection modules 102, and each output terminal of the power management module 103 is respectively connected to the control terminal of the corresponding fault detection unit 102.

[0055] For example, such as Figure 1As shown, the vehicle includes a first load 104, a second load 104, and a third load 104. The first load 104 corresponds to a first fault detection module 102, the second load 104 corresponds to a second fault detection module 102, and the third load 104 corresponds to a third fault detection module 102. Correspondingly, the power management module 103 includes a first output terminal, a second output terminal, and a third output terminal. In this scenario, the multiple output terminals of the power management module 103 are respectively connected to the control terminals of the multiple fault detection modules 102, meaning that the first output terminal is connected to the control terminal of the first fault detection module 102, the second output terminal is connected to the control terminal of the second fault detection module 102, and the third output terminal is connected to the control terminal of the third fault detection module 102.

[0056] It should be noted that, Figure 1 The diagram illustrates the connection relationship between the modules using only the vehicle power control device, which includes three loads 104 and three fault detection modules 102. In actual use, the number of multiple loads 104 and corresponding multiple fault detection modules 102 may be more or less, and will not be illustrated here.

[0057] In some embodiments, such as Figure 2 As shown, the fault detection module 102 includes a multiplexer 1021. The battery 101 and each load 104 have a main power supply path, a backup power supply path, and a fault diagnosis path. The multiplexer 1021 includes a moving contact, a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact. The moving contact is connected to the output terminal of the power management module 103. The first stationary contact is connected to the main power supply path of the corresponding load 104. The second stationary contact is connected to the backup power supply path of the corresponding load 104. The third stationary contact is connected to the fault diagnosis path of the corresponding load 104. The fourth stationary contact is left unconnected. The power management module 103 is used to switch the moving contact to different stationary contacts to determine the target load.

[0058] In some embodiments, the power management module 103 can generate control commands based on battery parameters of the battery, such as the battery's SOC, and send the control commands to the control terminal of the corresponding fault detection module 102 through the output terminal, so that the fault detection module 102 can switch the moving contact of the multiplexer 1021 to different stationary contacts based on the control commands.

[0059] In some embodiments, in order to achieve a fast response to control commands sent by the power management module 103, such as Figure 2As shown, the fault detection module 102 may include a switch controller. One end of the switch controller is connected to the output terminal of the power management module 103, and the other end is connected to the moving contact of the multiplexer 1021. The switch controller is used to parse and process control commands, so as to drive the moving contact of the multiplexer 1021 to switch to different stationary contacts based on the control commands sent by the power management module 103.

[0060] In other embodiments, such as Figure 3 As shown, the fault detection module 102 may also exclude the switch controller. In this case, the output of the power management module 103 is directly connected to the moving contact of the multiplexer 1021 to control the moving contact of the multiplexer 1021 to switch to different stationary contacts.

[0061] Among them, combined Figure 2 Switching the moving contact to different stationary contacts means controlling the moving contact of the multiplexer 1021 to close with different stationary contacts among the first, second, third, and fourth stationary contacts. The first stationary contact is... Figure 2 The A contact and the second stationary contact are Figure 2 The B contact and the third stationary contact are Figure 2 The C contact and the fourth stationary contact are Figure 2 The D-feature in the middle.

[0062] The power management module 103 can select a load 104 and switch the moving contact of the multiplexer 1021 corresponding to the load 104 to different stationary contacts to determine whether the selected load 104 is the target load based on changes in the battery parameters of the battery 101. The process of determining the target load can be referred to the relevant description of the vehicle power control method below, and will not be elaborated here.

[0063] In some embodiments, in order to improve power control efficiency, reduce the complexity of circuit layout, and lower the application cost of the technical solution of this application, such as... Figure 2 As shown, the backup power supply paths corresponding to multiple loads 104 can share a single backup power supply path; similarly, the fault diagnosis paths corresponding to multiple loads 104 can also share a single fault diagnosis path.

[0064] In some embodiments, such as Figure 3 As shown, the device also includes a fault clearing module 105; the power supply terminal of the fault clearing module 105 is connected to the battery 101, and the output terminal of the fault clearing module 105 is connected to the third stationary contact of each multiplexer switch 1021. The fault clearing module 105 is used to clear the fault code of the load 104. The fault code is the fault indication information generated by the load 104 after a fault occurs.

[0065] It should be noted that after load 104 malfunctions, a fault code will be generated to indicate that a fault has occurred within the load. Different fault codes indicate different fault types. Due to the presence of fault codes, load 102 may frequently self-start, thus frequently consuming the power of battery 101, causing abnormal discharge of battery 101.

[0066] Optionally, the fault clearing module 105 may be equipped with an integrated diagnostic chip, which is a diagnostic chip for the vehicle's electrical system and can identify and clear fault codes accumulated by the load 104.

[0067] In some embodiments, such as Figure 4 As shown, the device also includes an automatic control switch 106; the automatic control switch 106 is connected in series in the power supply path between the battery 101 and the multiple loads 104. The automatic control switch 106 is used to obtain the circuit voltage and disconnect the power supply path between the battery 101 and the multiple loads 104 when the circuit voltage is less than the voltage threshold.

[0068] In some embodiments, the automatic control switch 106 can be an electromagnetic relay to automatically disconnect the power supply path between the battery 101 and the multiple loads 104 based on the principle of electromagnetic induction. For example, the automatic control switch 106 includes an electromagnet and an armature. When the circuit voltage is less than a voltage threshold, the magnetic force generated by the electromagnet decreases due to the low voltage, causing the armature to fail to maintain its engaged state, thereby automatically disconnecting the power supply path between the battery 101 and the multiple loads 104.

[0069] It should be noted that circuit voltage refers to the voltage in the power supply path between battery 101 and multiple loads 104. When the circuit voltage is lower than the voltage threshold, it usually indicates that the current state of charge (SOC) of battery 101 is low and cannot continuously provide sufficient voltage to the power supply path. In this case, automatic control switch 106 can automatically disconnect to break the power supply path between battery 101 and multiple loads 104. This avoids battery 101 being depleted due to continuous power consumption by the loads, thus preventing it from affecting its lifespan. It also ensures that battery 101 still has a certain amount of remaining charge, so that when the user uses the vehicle next time, the remaining charge in battery 101 can guarantee the normal operation of all vehicle functions.

[0070] In some embodiments, such as Figure 4 As shown, the automatic control switch 106 can also be connected to a first external operator, which can respond to the user's control action to close the automatic control switch 106, thereby realizing the conduction of the power supply circuit between the battery 101 and multiple loads 104.

[0071] For example, since the power supply path between the battery and multiple loads 104 is disconnected, the user cannot unlock the vehicle with the remote key and must open the door with the mechanical key. When the user opens the door with the mechanical key, the rotation of the mechanical key will move the first external actuator, causing the automatic control switch 106 to close.

[0072] In some embodiments, the automatic control switch 106 can also automatically close when the circuit voltage is greater than the voltage threshold, so as to maintain the power supply path between the battery 101 and the multiple loads 104 when the circuit voltage is greater than the voltage threshold, that is, when the battery 101 does not currently have a continuous abnormal power loss, thereby realizing automatic control of the power supply path between the battery 101 and the multiple loads 104 based on the circuit voltage.

[0073] In some embodiments, the device may further include an alarm unit connected to the power management module 103, which can send alarm information when the vehicle's battery is depleted or abnormally depleted, so as to remind the user to charge the battery in time and troubleshoot the fault.

[0074] In some embodiments, such as Figure 5 As shown, the device also includes a safety lock switch 107; the safety lock switch 107 is connected in parallel across the automatic control switch 106, and the safety lock switch 107 is used to remain closed when the vehicle is powered on and open when the vehicle is powered off.

[0075] It should be noted that during vehicle use, the operation of load 104 may cause voltage fluctuations in the circuit. For example, if load 104 is an air conditioning load, the sudden increase in power demand when this load starts may cause a sudden drop in circuit voltage, leading to the automatic control switch 106 opening and automatically disconnecting the power supply path between battery 101 and multiple loads 104.

[0076] However, if the power supply path between the battery 101 and the multiple loads 104 is automatically disconnected during vehicle use, it will cause a huge safety hazard to the vehicle. Therefore, a safety lock switch 107 can be set in parallel with the automatic control switch 106 so that when the vehicle is powered on, even if the automatic control switch 106 is automatically disconnected due to voltage fluctuations, the battery 101 and the multiple loads 104 can still form a closed circuit through the safety lock switch 107, thereby improving the vehicle's driving safety.

[0077] In some embodiments, the device further includes a second external operator for disconnecting the power supply path between the battery 101 and the plurality of loads 104 in response to a user's control action, thereby enabling the user to actively disconnect the power supply path between the battery 101 and the plurality of loads 104 in the event of an emergency or a circuit fault, thereby improving the flexibility of the vehicle power control process.

[0078] For example, the second external operator can be a button connected to a circuit breaker switch. When the user presses the button, the circuit breaker switch is turned on and held to close the power supply path between the battery 101 and the multiple loads 104. When the user presses the button again, the circuit breaker switch is turned off, disconnecting the power supply path between the battery 101 and the multiple loads 104, and the button pops out.

[0079] The power management module 103 can serve as the execution entity of the vehicle power control method provided in this application embodiment. The power management module 103 may include at least one general-purpose CPU (Central Processing Unit), NP (Network Processor), microprocessor, or one or more integrated circuits for implementing the solution of this application, such as ASIC (Application-Specific Integrated Circuit), PLD (Programmable Logic Device), or a combination thereof. The aforementioned PLD may be CPLD (Complex Programmable Logic Device), FPGA (Field-Programmable Gate Array), GAL (Generic Array Logic), or any combination thereof.

[0080] In this embodiment, a power management module and fault detection modules corresponding to multiple loads are configured. The power management module can obtain the battery's State of Charge (SOC). When abnormal battery discharge is determined based on the battery's SOC, multiple fault detection modules can be controlled to identify a target load among multiple loads and disconnect the path between the battery and the target load. This prevents continuous abnormal battery discharge and improves the flexibility of battery power supply. Furthermore, a main power supply path, a backup power supply path, and a fault diagnosis path can be set between the battery and the load. By switching the path between the battery and the load, the cause of abnormal battery discharge can be investigated. Only when the abnormal battery discharge is caused by the load itself is the load considered the target load, and the path between the target load and the battery is disconnected. This improves the accuracy of target load identification, ensuring that all functions of the load can be performed normally while preventing abnormal battery discharge, further enhancing the flexibility of vehicle power control.

[0081] In addition, an automatic control switch is installed that can automatically disconnect the power supply path between the battery and multiple loads. When the circuit voltage is lower than the voltage threshold, the power supply path between the battery and all loads is directly disconnected to prevent the battery from consuming power further. This allows the battery to retain a certain amount of energy to meet the power demand of the vehicle for the next normal use, thereby improving the user experience.

[0082] The vehicle power control method provided in the embodiments of this application will now be explained in detail.

[0083] Figure 6 This is a flowchart of a vehicle power control method provided in an embodiment of this application. Please refer to it. Figure 6 The method includes the following steps.

[0084] Step 601: The power management module obtains the battery's SOC.

[0085] Step 602: If the SOC of the battery is lower than the first SOC threshold, the power management module determines the target load among multiple loads by controlling multiple fault detection modules. The target load refers to the load that causes abnormal battery discharge. The first SOC threshold is used to characterize battery discharge.

[0086] The first SOC threshold can be determined based on actual usage requirements. For example, the first SOC threshold can be 50%, meaning that when the battery's SOC is below 50%, the battery is considered to be depleted.

[0087] If the battery's SOC is lower than the first SOC threshold, it indicates that the battery is currently undercharged and there may be a risk of abnormal undercharge. At this time, the power management module can determine the target load among multiple loads and determine the cause of the abnormal undercharge in a timely manner, thereby improving the battery's safety.

[0088] It should be noted that since each control of multiple fault detection modules to determine the target load among multiple loads requires power from the battery, each control of multiple fault detection modules will further reduce the battery's State of Charge (SOC). Therefore, in this embodiment, the battery's SOC can be obtained, and the step of controlling multiple fault detection modules to determine the target load among multiple loads can be executed when the battery's SOC is lower than a first SOC threshold. In this way, the target load among multiple loads will only be determined by controlling multiple fault detection modules when the battery is depleted, thereby reducing battery power consumption and improving battery energy utilization efficiency.

[0089] In some embodiments, considering that the load may fail at any time during operation, multiple first SOC thresholds can be set, such as 50%, 30%, 20%, 15%, 10%, etc. Thus, as the battery's SOC decreases, whenever the battery's SOC drops to a certain level, the power management module will perform a step to determine the target load among multiple loads, thereby saving energy consumption on the battery while continuously detecting abnormal battery depletion.

[0090] In some embodiments, when the battery's SOC is below a first SOC threshold, the power management module can first determine whether the battery is abnormally discharged, i.e., whether a target load exists among multiple loads. If an abnormal discharge is determined, the target load is identified among the multiple loads by controlling multiple fault detection modules. However, if the battery is not abnormally discharged, i.e., the target load does not exist among the multiple loads, the step of identifying the target load by controlling multiple fault detection modules can be omitted to reduce battery power consumption and prevent further deterioration of the battery's discharge level.

[0091] In some embodiments, the power management module can determine the rate of change of the battery's State of Charge (SOC) based on the SOC, and then determine whether the battery is abnormally discharged based on the rate of change of the SOC. For example, the power management module can periodically detect the battery's SOC and determine the rate of change of the battery's SOC based on the SOC determined in the current cycle and the SOC determined in the previous cycle. If the rate of change of the SOC exceeds a rate threshold, the battery is considered to be abnormally discharged.

[0092] For example, the power management module can obtain the battery's SOC once per hour. If the battery's SOC is 50% in the current cycle and 60% in the previous cycle (1 hour ago), the battery's SOC change rate is 10% / hour. If the rate threshold is 5% / hour, the battery is considered to be abnormally depleted.

[0093] In other embodiments, the power management module can also determine whether the current battery depletion is normal based on the battery's discharge current.

[0094] For example, the power management module can determine whether the battery discharge current is greater than the abnormal current threshold. If the discharge current is greater than the abnormal current threshold, it means that the discharge current in the current circuit is high, that is, the battery discharges quickly, and the battery is considered to be abnormally low on power. At this time, the step of determining the target load among multiple loads by controlling multiple fault detection modules is executed.

[0095] For example, considering that battery depletion typically only occurs after the vehicle is powered off, and that the load typically operates intermittently after power-off (i.e., the load is normally in a dormant state and periodically wakes itself up to enter a working state), it can be concluded that the battery's discharge mode is also periodic. Based on this, the power management module can also determine the battery's discharge cycle based on the discharge current. If the length of the battery's discharge cycle (i.e., the duration of a single discharge) exceeds a length threshold, or if the battery's discharge frequency (i.e., the number of discharge cycles per unit time) exceeds a quantity threshold, it indicates that the battery is frequently discharging and is considered abnormally depleted. In this case, the module executes the step of controlling multiple fault detection modules to determine the target load among multiple loads. For example, the length threshold could be 3 seconds. When the length of the battery's discharge cycle reaches 4 seconds or even 5 seconds, it indicates that the current battery discharge duration is too long and is considered abnormally depleted. For example, the unit duration can be 1 hour, and the quantity threshold is 5 times. When the number of battery discharge cycles is greater than 5 times in 1 hour, it indicates that the current battery is frequently discharging, and the battery is considered to be abnormally low in power.

[0096] In some embodiments, the vehicle may also have a charging function, meaning that the battery can be charged via an energy storage module when it is depleted. In this scenario, if the battery's State of Charge (SOC) is below a first SOC threshold, the charging mode can be triggered first, charging the battery via the energy storage module. If the battery remains depleted even after charging via the energy storage module, it can be considered abnormally depleted, and in this case, the step of determining the target load among multiple loads by controlling multiple fault detection modules is executed.

[0097] In this way, when the battery is depleted, the system determines whether the battery depletion is abnormal and whether it is necessary to execute the step of identifying the target load among multiple loads by controlling multiple fault detection modules. This improves the accuracy of identifying the target load, avoids wasting battery power due to invalid execution steps, and further saves energy consumption of the battery during vehicle power control, thereby improving energy utilization.

[0098] In some embodiments, if multiple first SOC thresholds are set, the corresponding abnormal current threshold and abnormal frequency threshold can be increased as the first SOC threshold decreases, so as to improve the judgment criteria for abnormal battery discharge.

[0099] For example, the power management module may include a mapping table indicating the abnormal current threshold and abnormal frequency threshold corresponding to different first SOC thresholds. For instance, when the first SOC threshold is 50%, the corresponding abnormal current threshold may be 0.4A, and when the first SOC threshold is 30%, the corresponding abnormal current threshold may be 0.3A. The power management module can determine abnormal battery discharge based on this mapping table and the current parameters of the battery. For example, when the battery's SOC first falls below 50%, such as when the battery's SOC is 49%, if the power management module obtains a battery discharge current of 0.35A, since the battery's SOC is not below the first SOC threshold of 30%, the power management module determines whether the battery is abnormally discharged based on the abnormal current threshold of 0.4A. If the determination result is that the battery is normally discharged, the process ends. As the battery's SOC gradually decreases, when the battery's SOC first falls below 30%, such as when the battery's SOC is 29%, the power management module obtains the battery's discharge current again. If the discharge current is still 0.35A, since the battery's SOC is below 30%, the power management module determines whether the battery is abnormally discharged based on the abnormal current threshold of 0.3A. If the determination result is that the battery is abnormally discharged, then the step of determining the target load among multiple loads by controlling multiple fault detection modules is executed.

[0100] In other words, as the SOC of the battery decreases, the criteria for judging whether the battery is in a state of normal discharge will become more and more stringent, thereby achieving a balance between meeting the expected power demand of the vehicle's various loads and protecting the battery's charge level.

[0101] In some embodiments, to prevent the vehicle from failing to start normally the next time due to severe battery depletion, a second SOC threshold can be set. If the battery's SOC is greater than the second SOC threshold, the power management module executes step 602, where the second SOC threshold is less than the first SOC threshold. The second SOC threshold is used to characterize the SOC required by the battery when the vehicle is started next time. If the battery's SOC is less than or equal to the second SOC threshold, the power management module disconnects the power supply path between the battery and multiple loads.

[0102] In other words, the power management module only identifies the target load among multiple loads and disconnects the power supply path between the battery and the target load when the battery's SOC is greater than the second SOC threshold. Conversely, when the battery's SOC is less than or equal to the second SOC threshold, the power supply path between the battery and all loads can be directly disconnected due to the low SOC. This allows the battery to retain some energy to meet the vehicle's power needs for the next normal use, further improving the flexibility of vehicle power control.

[0103] In some embodiments, the fault detection module includes a multiplexer switch, and the battery has a main power supply path, a backup power supply path, and a fault diagnosis path between each load. The power management module can determine the target load among the multiple loads through steps (1)-(4).

[0104] (1) The power management module selects one load from multiple loads, controls the moving contact of the multiplexer corresponding to the load that has not been selected to remain connected to the first stationary contact, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect to the fourth stationary contact, so as to disconnect the currently selected load.

[0105] Optionally, the power management module can be configured to select one load from multiple loads based on actual usage requirements. For example, different priorities can be set for different loads, and the power management module can select loads from multiple loads in ascending order of priority.

[0106] In this way, even if each load is the target load, when it is necessary to disconnect the path between the target load and the battery, multiple loads will be disconnected one by one in order of priority from low to high, so as to ensure that the functions of the highest priority load can be realized normally.

[0107] The power management module can determine whether the battery's power consumption is normal after disconnecting the currently selected load, in order to determine whether the abnormal battery depletion is related to the currently selected load.

[0108] It should be noted that whether the abnormal battery discharge is related to the currently selected load refers to the following: the abnormal discharge of the load may be caused by the load itself, in which case the currently selected load can be considered as the target load; or it may be caused by other reasons, such as the connection between the currently selected load and the battery. Therefore, by performing subsequent steps (2)-(4), the causal relationship between the abnormal battery discharge and the currently selected load can be determined, so as to determine whether the currently selected load is the target load.

[0109] (2) If the battery power consumption is normal after disconnecting the currently selected load, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the third stationary contact, clears the fault code in the currently selected load through the fault diagnosis path of the currently selected load, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the first stationary contact, so as to reconnect the main power supply path corresponding to the currently selected load.

[0110] In some embodiments, the power management module can acquire the battery discharge current and determine whether the battery power consumption is normal after disconnecting the currently selected load based on the change in the battery discharge current after disconnecting the currently selected load.

[0111] For example, the power management module can obtain the battery discharge current after disconnecting the currently selected load to obtain the first discharge current. If the first discharge current is less than the current threshold, it indicates that the battery discharge current has returned to normal after disconnecting the currently selected load. At this time, it can be considered that the battery power consumption is normal after disconnecting the currently selected load, that is, the abnormal battery depletion is related to the currently selected load. Then, subsequent steps are executed to determine whether the currently selected load is the target load.

[0112] It should be noted that, considering that at least two loads, including the currently selected load, are target loads, simply disconnecting the currently selected load may not be sufficient to reduce the first discharge current below the current threshold. Therefore, in some embodiments, the contribution of the currently selected load to the abnormal battery discharge can be determined based on the first discharge current, thereby improving the accuracy of determining whether the currently selected load is the target load.

[0113] For example, a reference discharge current can be identified. By comparing the change in the first discharge current with the reference discharge current, the contribution of the currently selected load to the abnormal battery discharge can be determined. The reference discharge current can be the battery discharge current when the moving contact of the multiplexer corresponding to all loads is connected to the first stationary contact. Then, based on the difference between the reference discharge current and the first discharge current, the reduction in the battery discharge current caused by cutting off the path between the currently selected load and the battery can be determined. It can be understood that the larger this reduction, the greater the impact of the power supply path between the currently selected load and the battery on the battery discharge current; therefore, the contribution of the currently selected load to the abnormal battery discharge can be considered greater.

[0114] Based on this, in some embodiments, if the difference between the reference discharge current and the first discharge current is greater than a first target threshold, it can be determined that the abnormal battery depletion is related to the currently selected load. In this case, it can be assumed that the battery's power consumption is normal after disconnecting the currently selected load, and subsequent steps can be performed to determine whether the currently selected load is the target load.

[0115] For example, the current threshold is 500mA, meaning that the battery's power consumption is considered normal if the discharge current is less than 500mA. The first target threshold is 200mA. With the moving contact of the multiplexer corresponding to all loads connected to the first stationary contact, the battery's discharge current, i.e., the reference discharge current, is 900mA; the first discharge current after disconnecting the currently selected load is 600mA. Since the difference between the reference discharge current and the first discharge current is 300mA, which is greater than the first target threshold of 200mA, it can be considered that the battery's power consumption is normal after disconnecting the currently selected load, meaning that the battery's power consumption has returned to normal to some extent. At this point, it can be determined that the abnormal battery depletion is related to the currently selected load, and subsequent steps are performed to determine whether the currently selected load is the target load.

[0116] Optionally, if the first discharge current is greater than or equal to the current threshold, and the difference between the first discharge current and the reference discharge current is less than or equal to the first target threshold, then the currently selected load can be considered to have a small contribution to the abnormal battery discharge. Therefore, it is determined that the abnormal battery discharge is unrelated to the currently selected load, i.e., the currently selected load is not the target load. In this case, the power management module can control the moving contact of the multiplexer corresponding to the currently selected load to remain connected to the first stationary contact, so as to conduct the main power supply path corresponding to the currently selected load, thereby ensuring that the currently selected load can work normally.

[0117] Based on the above description, if the battery power consumption is normal after disconnecting the currently selected load, it indicates that the currently selected load is related to the abnormal battery power depletion. However, considering that in some scenarios, the presence of fault codes in the currently selected load may cause it to start frequently, leading to abnormal battery power consumption, the fault codes in the currently selected load can be cleared using the fault diagnosis path, and the main power supply path corresponding to the currently selected load can be reconnected to determine whether the abnormal battery power depletion is caused by the fault codes in the currently selected load.

[0118] In some embodiments, when the currently selected load is connected to the fault diagnosis path, the power management module can send a fault clearing command to the currently selected load. When the load receives the fault clearing command, it can clear the internal fault codes, thereby clearing the fault codes in the currently selected load.

[0119] In other embodiments, in conjunction with the above regarding Figure 3 According to the relevant description, the fault diagnosis path may include a fault clearing module. When the currently selected load is connected to the fault diagnosis path, the fault clearing module can clear the fault codes accumulated in the load, thereby clearing the fault codes in the currently selected load.

[0120] Optionally, the power management module can determine whether the battery power consumption is normal after the main power supply path corresponding to the currently selected load is reconnected, so as to determine whether the abnormal battery power loss is caused by the fault code in the currently selected load.

[0121] Furthermore, if abnormal battery power consumption occurs after disconnecting the currently selected load, it indicates that the currently selected load is unrelated to the abnormal battery depletion, meaning the currently selected load is not the target load. In this case, the power management module can control the moving contact of the multiplexer corresponding to the currently selected load to remain connected to the first stationary contact, thereby ensuring the main power supply path for the currently selected load is maintained, ensuring its normal operation. The power management module can then reselect a load from those that have never been selected before, and by controlling the fault detection module corresponding to the reselected load, determine whether the reselected load is the target load, until the target load is identified or the battery power consumption returns to normal.

[0122] It should be noted that, in conjunction with the above, in the embodiments of this application, normal battery power consumption can be understood as: the battery power consumption has fully recovered to normal, or the battery power consumption has partially recovered to normal; abnormal battery power consumption means that the battery is undercharged.

[0123] (3) If the battery power consumption is abnormal after the main power supply path corresponding to the currently selected load is reconnected, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the second stationary contact in order to connect the backup power supply path of the currently selected load.

[0124] In some embodiments, the power management module can obtain the discharge current of the battery and, based on the change in the discharge current of the battery after reconnecting the main power supply path corresponding to the currently selected load, determine whether the power consumption of the battery is normal after reconnecting the main power supply path corresponding to the currently selected load.

[0125] For example, the power management module can obtain the battery discharge current after the main power supply path corresponding to the currently selected load is reconnected, thus obtaining a second discharge current. If the second discharge current is less than the current threshold, it indicates that the battery discharge current has returned to normal levels after the main power supply path corresponding to the currently selected load is reconnected. Therefore, it can be considered that the battery is no longer abnormally depleted, meaning that the target load is not present among the multiple loads. At this time, the power management module can control the main power supply path corresponding to the currently selected load to remain connected to ensure that the currently selected load can work normally, and terminate the control of the vehicle's power supply to reduce the energy consumption of the battery and avoid further aggravating the battery's depletion.

[0126] Based on the above description, considering that at least two loads, including the currently selected load, are target loads, simply clearing the fault codes in the currently selected load may not be sufficient to make the second discharge current less than the current threshold. Therefore, in some embodiments, the contribution of the fault codes in the currently selected load to the battery's abnormal discharge can also be determined based on the second discharge current, thereby improving the accuracy of determining whether the currently selected load is the target load.

[0127] For example, the contribution of the fault code in the currently selected load to the battery's abnormal discharge can be determined by observing the change in the second discharge current compared to the reference discharge current. Combining this with the description of the reference discharge current above, the reduction in the battery's discharge current due to clearing the fault code in the currently selected load can be determined based on the difference between the reference discharge current and the second discharge current. It can be understood that the larger this reduction, the greater the impact of the fault code in the currently selected load on the battery's discharge current when the power supply path between the currently selected load and the battery is established; therefore, it can be considered that the fault code in the currently selected load contributes more to the battery's abnormal discharge.

[0128] Based on this, in some embodiments, if the difference between the reference discharge current and the second discharge current is greater than the second target threshold, it can be considered that the abnormal battery discharge is related to the fault code in the currently selected load, and since the fault code in the currently selected load has been cleared, the abnormal battery discharge is no longer related to the currently selected load. In this case, the currently selected load can be considered not to be the target load, and the power management module can control the main power supply path corresponding to the currently selected load to remain on, so as to ensure that the currently selected load can work normally.

[0129] Since the current battery power consumption is still abnormal, meaning that there is still a target load among the unselected loads, a new load can be selected from the unselected loads. The fault detection module corresponding to the newly selected load can then be controlled to determine whether the newly selected load is the target load, until the target load is determined.

[0130] It should be noted that since the selected load and the battery will inevitably lead to an increase in the battery discharge current, the second target threshold used to determine whether the fault code in the selected load is related to the battery's depletion is less than the first target threshold mentioned above.

[0131] For example, still taking a current threshold of 500mA and a second target threshold of 100mA, with the moving contact of the multiplexer corresponding to all loads connected to the first stationary contact, the battery discharge current, i.e., the reference discharge current, is 900mA. If the fault code of the currently selected load is cleared and the main power supply path corresponding to the currently selected non-load is reconnected, the discharge current is 700mA. That is, after clearing the fault code in the currently selected load and reconnecting the main power supply path corresponding to the currently selected load, the battery discharge current decreases by 200mA, which is greater than the second target threshold of 100mA. Therefore, it can be considered that after clearing the fault code in the currently selected load and reconnecting the main power supply path corresponding to the currently selected load, the battery's power consumption is normal, i.e., it has recovered to a certain extent. At this time, even if the battery is still abnormally low on power, it is considered that the abnormal low on power is no longer related to the currently selected load, i.e., the currently selected load is determined not to be the target load. At this time, the power management module can control the main power supply path corresponding to the currently selected load to remain connected so that the currently selected load can work normally. Then, the power management module selects a new load from the previously unselected loads and determines whether the newly selected load is the target load by controlling the fault detection module corresponding to the new load, until the target load is determined or the battery power consumption returns to normal.

[0132] Optionally, if the second discharge current is greater than or equal to the current threshold and the difference between the reference discharge current and the second discharge current is less than or equal to the second target threshold, it is considered that clearing the fault code in the currently selected load has a small contribution to the battery's discharge abnormality, and therefore it is determined that the battery's discharge abnormality is unrelated to the fault code in the currently selected load.

[0133] In other words, if clearing the fault codes in the currently selected load contributes little to the abnormal battery discharge, it means that the abnormal battery discharge is not caused by the fault codes in the currently selected load. However, combining the aforementioned steps (1)-(2), it can be seen that the abnormal battery discharge is related to the currently selected load. Therefore, subsequent steps can be performed to further determine the causal relationship between the abnormal battery discharge and the currently selected load, in order to determine whether the currently selected load is the target load.

[0134] Based on the above description, if abnormal battery power consumption occurs after reconnecting the main power supply path corresponding to the currently selected load, it indicates that the abnormal battery power loss is related to the currently selected load and unrelated to the fault code of the currently selected load. Considering that in some scenarios, a failure in the main power supply path of the currently selected load may also cause abnormal battery power consumption due to a connection between the currently selected load and the battery via the main power supply path, the power management module can activate the backup power supply path of the currently selected load to determine whether the abnormal battery power loss is caused by the main power supply path of the currently selected load.

[0135] If the battery's power consumption returns to normal after the main power supply path corresponding to the currently selected load is reconnected, then the abnormal battery depletion is considered to be caused by a fault code in the currently selected load. Since the battery's power consumption has returned to normal after clearing the fault code and reconnecting the main power supply path corresponding to the currently selected load, it can be assumed that the battery is no longer abnormally depleted, and there is no target load among the multiple loads. At this point, the power management module can control the main power supply path corresponding to the currently selected load to remain connected, allowing the currently selected load to operate normally, and terminate the control of the vehicle's power supply to reduce battery power consumption and prevent further depletion of the battery.

[0136] (4) If the battery still consumes power abnormally after the backup power supply path of the currently selected load is turned on, the power management module determines the currently selected load as the target load.

[0137] In some embodiments, the power management module can acquire the discharge current of the battery and, based on the change in the discharge current of the battery after the backup power supply path of the currently selected load is turned on, determine whether the power consumption of the battery is normal after the backup power supply path of the currently selected load is turned on.

[0138] For example, the power management module can obtain the battery discharge current after the backup power supply path of the currently selected load is turned on, thus obtaining the third discharge current. If the third discharge current is less than the current threshold, it indicates that the battery discharge current has returned to normal levels after the backup power supply path of the currently selected load is turned on. Therefore, it can be considered that the battery is no longer abnormally depleted, that is, there is no target load among the multiple loads. At this time, the power management module can control the backup power supply path of the currently selected load to remain on to ensure that the currently selected load can work normally, and terminate the control of the vehicle power supply to reduce the energy consumption of the battery and avoid further aggravating the battery depletion.

[0139] Based on the above description, considering that at least two loads, including the currently selected load, are target loads, simply activating the backup power supply path of the currently selected load may not be sufficient to reduce the third discharge current below the current threshold. Therefore, in some embodiments, the contribution of activating the main power supply path of the currently selected load to the abnormal battery discharge can be determined based on the third discharge current, thereby improving the accuracy of determining whether the currently selected load is the target load.

[0140] For example, the contribution of the main power supply path for the currently selected load to the abnormal battery discharge can be determined by observing the change in the third discharge current compared to the reference discharge current. Combining this with the description of the reference discharge current above, the reduction in the battery discharge current caused by activating the backup power supply path for the currently selected load can be determined based on the difference between the reference discharge current and the third discharge current. It can be understood that the larger this reduction, the greater the impact of activating the main power supply path for the currently selected load on the battery discharge current; therefore, it can be considered that activating the main power supply path for the currently selected load contributes more to the abnormal battery discharge.

[0141] Based on this, in some embodiments, if the difference between the reference discharge current and the third discharge current is greater than the second target threshold, it can be considered that the abnormal battery discharge is related to the main power supply path corresponding to the currently selected load, and since the main power supply path of the currently selected load has been disconnected and the backup power supply path has been turned on, the abnormal battery discharge is no longer related to the currently selected load. In this case, the currently selected load can be considered not to be the target load. At this time, the power management module can control the backup power supply path of the currently selected load to remain on, so as to ensure that the currently selected load can work normally.

[0142] Since the current battery power consumption is still abnormal, meaning that there is still a target load among the unselected loads, a new load can be selected from the unselected loads. The fault detection module corresponding to the newly selected load can then be controlled to determine whether the newly selected load is the target load, until the target load is determined.

[0143] The description regarding the difference between the reference discharge current and the third discharge current being greater than the second target threshold can be found in the above description regarding the difference between the reference discharge current and the second discharge current being greater than the second target threshold, and will not be repeated here.

[0144] Optionally, if the third discharge current is greater than or equal to the current threshold and the difference between the reference discharge current and the third discharge current is less than or equal to the second target threshold, it is considered that the contribution of turning on the main power supply path of the currently selected load to the abnormal battery discharge is small, and therefore it is determined that the abnormal battery discharge is unrelated to the main power supply path of the currently selected load.

[0145] In other words, if the contribution of the main power supply path of the currently selected load to the abnormal battery discharge is small, it means that the abnormal battery discharge is not caused by the abnormality of the main power supply path corresponding to the currently selected load. Combining the aforementioned steps (1)-(3), it can be seen that the abnormal battery discharge is related to the currently selected load, but not to the fault code of the currently selected load, nor to the main power supply path corresponding to the currently selected load. Therefore, it can be considered that the abnormal battery discharge is caused by the current selected load itself, and the current selected load can be considered as the target load.

[0146] If the battery's power consumption returns to normal after activating the backup power supply path for the currently selected load, then the abnormal battery depletion is considered to be caused by an anomaly in the main power supply path corresponding to the currently selected load. Since the battery's power consumption has returned to normal after activating the backup power supply path, it can be assumed that the battery is no longer abnormally depleted, and the target load is not among the multiple loads. At this point, the power management module can control the backup power supply path of the currently selected load to remain active, allowing the selected load to operate normally, and terminate control of the vehicle's power supply to reduce battery power consumption and prevent further depletion of the battery.

[0147] Step 603: The power management module controls the fault detection module corresponding to the target load to cut off the path between the battery and the target load.

[0148] Optionally, the power management module can control the connection between the moving contact in the multiplexer corresponding to the target load and the suspended fourth stationary contact, thereby cutting off the path between the battery and the target load.

[0149] In this embodiment, by acquiring the SOC of the battery, when the SOC of the battery is lower than the first SOC threshold, multiple fault detection modules can be controlled in a timely manner to determine the target load among multiple loads, thereby investigating the cause of abnormal battery depletion and promptly cutting off the path between the battery and the target load. This is to prevent the battery from continuously consuming abnormal power, which could lead to serious battery depletion, affect the battery's lifespan, or even cause various functions of the vehicle to fail to start normally when it is powered on again, thereby improving the flexibility of vehicle power control.

[0150] Furthermore, when a target load is identified from multiple loads, one load is selected. First, by disconnecting the currently selected load, the correlation between the selected load and the abnormal battery power consumption is determined. Then, if the correlation between the selected load and the abnormal battery power consumption is determined, the fault detection module is controlled to sequentially investigate the fault codes in the load and the cause of the problem in the main power supply path between the load and the battery. This not only allows for the determination of the cause of the abnormal battery power loss, but also enables the repair of the abnormal battery power loss by clearing fault codes in the load, switching the main power supply path, and switching the backup power supply path. This ensures that the normal functioning of each load is maintained as much as possible while preventing continuous abnormal battery power loss, thus avoiding vehicle malfunctions caused by directly disconnecting the load, which could lead to safety hazards.

[0151] In addition, by setting a second SOC threshold, when the battery's SOC is low, the power supply path between the battery and all loads can be directly disconnected, allowing the battery to retain a certain amount of charge for the next vehicle start-up. This ensures that the battery can still meet the vehicle's starting requirements when the user needs to start the vehicle, thereby improving the battery's energy utilization efficiency.

[0152] In some embodiments, this application also provides a vehicle that includes the vehicle power control device described above.

[0153] In some embodiments, a computer-readable storage medium is also provided, which stores a computer program that, when executed by a processor, implements the steps of the vehicle power control method described above. For example, the computer-readable storage medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, or optical data storage device.

[0154] It is worth noting that the computer-readable storage medium mentioned in the embodiments of this application can be a non-volatile storage medium, in other words, it can be a non-transient storage medium.

[0155] It should be understood that all or part of the steps of the above embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented wholly or partially in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions can be stored in the above-described computer-readable storage medium.

[0156] That is, in some embodiments, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to perform the steps of the vehicle power control method described above.

[0157] It should be understood that "at least one" as mentioned herein refers to one or more, and "multiple" refers to two or more. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. In addition, in order to clearly describe the technical solutions of the embodiments of this application, the terms "first," "second," etc., are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and the terms "first," "second," etc., are not necessarily different.

[0158] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, data stored, data displayed, etc.) and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0159] The above descriptions are embodiments provided in this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle power control device, characterized in that, The device includes a battery, multiple fault detection modules, and a power management module. The battery is connected to multiple loads of the vehicle to provide electrical energy to the multiple loads, and the multiple loads are connected in parallel. The plurality of fault detection modules correspond one-to-one with the plurality of loads, and the fault detection modules are connected in series in the path between the battery and the corresponding load. The detection terminal of the power management module is connected to the battery, and the multiple output terminals of the power management module are respectively connected to the control terminals of the multiple fault detection modules. The power management module is used to obtain the state of charge (SOC) of the battery, and when the battery is abnormally depleted based on the SOC, it controls the multiple fault detection modules to determine the target load among the multiple loads and cuts off the path between the battery and the target load. The target load refers to the load that causes the battery to be abnormally depleted. The fault detection module includes a multi-way selection switch, and the battery has a main power supply path, a backup power supply path, and a fault diagnosis path between itself and each of the loads. The multiplexer includes a moving contact, a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact. The moving contact is connected to the output terminal of the power management module. The first stationary contact is connected to the main power supply path of the corresponding load. The second stationary contact is connected to the backup power supply path of the corresponding load. The third stationary contact is connected to the fault diagnosis path of the corresponding load. The fourth stationary contact is left unconnected. The power management module is used to switch the moving contact to different stationary contacts in order to determine the target load.

2. The apparatus as claimed in claim 1, characterized in that, The device also includes a fault clearing module; The power supply terminal of the fault clearing module is connected to the battery, and the output terminal of the fault clearing module is connected to the third stationary contact of each of the multiplexer switches. The fault clearing module is used to clear the fault code of the load, which is the fault indication information generated after the load has a fault.

3. The apparatus as described in claim 1, characterized in that, The device also includes an automatic control switch; The automatic control switch is connected in series in the power supply path between the battery and the plurality of loads. The automatic control switch is used to obtain the circuit voltage and disconnect the power supply path between the battery and the plurality of loads when the circuit voltage is less than a voltage threshold.

4. The apparatus as described in claim 3, characterized in that, The device also includes a safety locking switch; The safety lock switch is connected in parallel across the automatic control switch. The safety lock switch is used to remain closed when the vehicle is powered on and open when the vehicle is powered off.

5. A method for controlling vehicle power supply using the apparatus according to any one of claims 1 to 4, characterized in that, The method includes: The power management module obtains the SOC of the battery; If the SOC of the battery is lower than the first SOC threshold, the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules. The target load refers to the load that causes the battery to be abnormally depleted. The first SOC threshold is used to characterize the battery being depleted. The power management module controls the fault detection module corresponding to the target load to cut off the path between the battery and the target load; The fault detection module includes a multiplexer switch, and the battery has a main power supply path, a backup power supply path, and a fault diagnosis path between itself and each load; the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules, including: The power management module selects one load from the plurality of loads, controls the moving contact of the multiplexer corresponding to the load that has not been selected to remain connected to the first stationary contact, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect to the fourth stationary contact, so as to disconnect the currently selected load. If the battery consumes power normally after disconnecting the currently selected load, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the third stationary contact, clears the fault code in the currently selected load through the fault diagnosis path of the currently selected load, and controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the first stationary contact, so as to reconnect the main power supply path corresponding to the currently selected load. If the battery consumes power abnormally after the main power supply path corresponding to the currently selected load is reconnected, the power management module controls the moving contact of the multiplexer corresponding to the currently selected load to connect with the second stationary contact in order to connect the backup power supply path of the currently selected load. If the battery still consumes power abnormally after the backup power supply path of the currently selected load is activated, the power management module determines that the currently selected load is the target load.

6. The method as described in claim 5, characterized in that, Before the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules, the method further includes: The power management module obtains the current discharge current of the battery; If the current discharge current of the battery is greater than the current threshold, the power management module performs the step of determining the target load among the plurality of loads by controlling the plurality of fault detection modules.

7. The method according to any one of claims 5-6, characterized in that, Before the power management module determines the target load among the multiple loads by controlling the multiple fault detection modules, the method further includes: If the SOC of the battery is greater than the second SOC threshold, the power management module performs the step of determining the target load among the multiple loads by controlling the multiple fault detection modules. The second SOC threshold is less than the first SOC threshold. The second SOC threshold is used to characterize the SOC required by the battery when the vehicle is started next time. If the SOC of the battery is less than or equal to the second SOC threshold, the power management module disconnects the power supply path between the battery and the plurality of loads.

8. A vehicle, characterized in that, The vehicle includes a vehicle power control device as described in any one of claims 1 to 4.

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