Control method for vehicle power supply system, vehicle power supply system, and vehicle

Abstract

The invention provides a control method of a vehicle power supply system, the vehicle power supply system and a vehicle, and relates to the technical field of vehicle control. The vehicle comprises a standby power supply, a whole vehicle power supply module, a control module and at least one power utilization end, and the standby power supply is connected with the power utilization end of vehicle-mounted equipment in series to supply power to the vehicle-mounted equipment. And controlling a path between the standby power supply and the power utilization end of the vehicle-mounted equipment to be switched on, and controlling a path between the whole vehicle power supply module and the power utilization end of the vehicle-mounted equipment to be switched off. By means of the design, continuous power supply to the vehicle-mounted electric equipment after the vehicle is powered off can be achieved, and meanwhile the problem that a storage battery is over-discharged in a traditional scheme is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a control method for a vehicle power system, a vehicle power system, and a vehicle. Background Art

[0002] With the increasing popularity of automobiles, car owners are increasingly demanding on-board power supplies. These demands are becoming increasingly diverse, encompassing a wide range of power usage scenarios, including on-board USB ports, 220V AC outlets, and wireless charging devices. However, existing on-board power systems are unable to continue providing power after the vehicle is powered off, failing to meet users' needs for continuous power to electronic devices in this scenario.

[0003] Traditional solutions often rely on the vehicle's battery. That is, after the vehicle is powered off, the vehicle battery is used to charge the user's electronic devices. This not only limits the user's in-car power usage time, but the frequent charging and discharging of the battery will also shorten the battery life and have a negative impact on the vehicle's starting performance and electronic system stability. Summary of the Invention

[0004] Based on the requirements of the above-mentioned vehicle usage scenarios, the present application provides a control method for a vehicle power system, a vehicle power system, and a vehicle.

[0005] In the first aspect, the present application provides a control method for a vehicle power supply system, wherein the vehicle includes a backup power supply, a vehicle power module and a control module, and at least one power end of an on-board device. The backup power supply and the power end of the on-board device are connected in series to power the on-board device. The control method for the vehicle power supply system includes: when the vehicle is in a power-off state, controlling the path between the backup power supply and the power end of the on-board device to be connected, and controlling the path between the vehicle power module and the power end of the on-board device to be disconnected.

[0006] In the above technical solution, a backup power supply is added to the vehicle power system. When the vehicle is detected to be powered off, the backup power supply is switched from the vehicle power module to the backup power supply. The backup power supply is connected in series with the power terminals of the onboard devices, and the control module controls whether power is supplied to the onboard devices. Specifically, before the vehicle is powered off, the vehicle power module supplies power to the vehicle circuits, and the path between the vehicle power module and the power terminals of the onboard devices is connected. When the vehicle is detected to be powered off, the path between the backup power supply and the power terminals of the onboard devices is controlled to be connected, or the path between the vehicle power module and the power terminals of the onboard devices is controlled to be disconnected. After the vehicle is powered off, the backup power supply supplies power to the power terminals of the onboard devices. The backup power supply is relatively independent from the battery of the vehicle power module, effectively physically isolated. The backup power supply operates only after the vehicle is powered off and does not contribute to the startup power supply. The battery of the vehicle power module is used to supply the instantaneous high current during engine startup and does not contribute to the power supply of the onboard devices after the vehicle is powered off. This prevents the battery of the vehicle power module from over-discharge damage caused by continuous discharge, thereby extending its cycle life.

[0007] Optionally, in some possible implementations, the above control method may further include: when the vehicle is in a charging state, charging the backup power supply and / or the power battery pack in the vehicle power module through the vehicle charging port.

[0008] In the above technical solution, when the vehicle is in a charging state, the backup power supply and / or the power battery pack in the vehicle power module are charged through the vehicle charging port, so that the backup power supply can be replenished in time so that after the vehicle is powered off, the backup power supply has sufficient power to supply power to the power-consuming end of the on-board equipment.

[0009] Optionally, in some possible implementations, the control method may further include:

[0010] When the vehicle's engine is started, the engine is controlled to charge the backup power supply and / or the power battery pack in the vehicle's power module through the generator.

[0011] In the above technical solution, when the engine is started, the engine mechanical energy is converted into electrical energy through the generator to charge the power battery pack and / or backup power supply, forming an "engine-generator-dual battery" energy closed loop.

[0012] Optionally, in some possible implementations, charging the backup power supply and / or the power battery pack in the vehicle power module includes:

[0013] When the state of charge of the power battery pack is less than a first threshold, only charging the power battery pack;

[0014] When the state of charge of the power battery pack is greater than or equal to a second threshold, supplying power to the power battery pack and the backup power supply;

[0015] The second threshold is greater than the first threshold.

[0016] In the above technical solution, through multi-threshold triggered priority control, safe and efficient management of dual power charging is achieved without increasing hardware complexity. It is especially suitable for new energy vehicles with high requirements for endurance reliability.

[0017] Optionally, in some possible implementations, it may also include: when the vehicle is in a driving state, controlling the power battery pack of the vehicle power module to charge the backup power supply.

[0018] In the above technical solution, when the vehicle is in motion, the power battery pack serves as the primary power source, powering the drive motor and onboard devices. During this process, if excess energy is available, the system, through built-in circuitry or control logic, transfers this excess energy to a backup power source for storage. This process requires no additional energy input and utilizes only the "excess power capacity" of the power battery pack while the vehicle is in motion, achieving secondary energy utilization.

[0019] Optionally, in some possible implementations, the method further includes:

[0020] Obtaining setting parameters sent by the vehicle host and / or the vehicle communication terminal, and controlling the discharge parameters of the backup power supply based on the setting parameters;

[0021] and / or,

[0022] Obtain power consumption parameters of each on-board power-consuming device connected to the power-consuming terminal of the on-board device;

[0023] The power supply status of the backup power supply is estimated based on the power consumption parameters, and the power supply status is sent to the vehicle host and / or to the mobile terminal via the vehicle communication terminal.

[0024] In the above technical solution, the vehicle computer serves as a local interactive terminal, providing a visual operation interface, such as a touch screen and voice commands, so that users can directly input setting parameters such as discharge time; the on-board communication terminal can communicate with the user's mobile terminal through the cloud, allowing the user to set parameters remotely. When the vehicle is powered off and the backup power supply is triggered, the control module can accurately control the discharge parameters of the backup power supply according to the setting parameters obtained from the on-board host and / or the on-board communication terminal, thereby achieving precise control of the power output. The embodiment of the present application transmits data to the on-board host via the CAN bus, which can achieve local visual display; at the same time, the control module uploads the data to the cloud via the on-board communication terminal, and the cloud pushes the information to the user's mobile terminal, such as a mobile phone. The user can intuitively obtain the status of the backup power supply through the on-board host or mobile phone APP. The entire process relies on the vehicle's existing communication architecture to achieve real-time synchronization of data and multi-terminal sharing.

[0025] Optionally, in some possible implementations, the method further includes:

[0026] Determining the charging priority of each on-board electrical device based on the historical power consumption data of each of the multiple on-board electrical devices connected to the on-board electrical device power terminal;

[0027] The power consumption of multiple on-board electrical devices is distributed according to the charging priority and the rated power of the backup battery.

[0028] In the above technical solution, the embodiment of the present application can establish a profile of the user's power usage habits by continuously monitoring the usage data of each interface. For example, it can automatically identify the user's frequently used devices, prioritize charging needs, reduce the operation of manually switching devices, and improve convenience.

[0029] Optionally, in some possible implementations, the method further includes:

[0030] Obtaining operating parameters of the backup battery;

[0031] When the operating parameters of the backup battery meet the preset conditions, the charging path or the discharging path electrically connected to the backup power supply is disconnected.

[0032] In the above technical solution,

[0033] The operating parameters of the backup power supply can be monitored in real time. If the operating parameters of the backup power supply meet the preset conditions, it means that the backup power supply is working abnormally, so the charging path or discharging path of the backup power supply electrical connection is disconnected, effectively improving the safety and service life of the backup power supply.

[0034] In a second aspect, the present application provides a vehicle power supply system, comprising:

[0035] Backup power supply, vehicle power module and control module. The backup power supply is connected in series with the power terminal of the on-board equipment to power the on-board equipment;

[0036] The control module is electrically connected to the backup power supply and the vehicle power module respectively;

[0037] The control module is used to control the conduction of the path between the backup power supply and the power end of the on-board equipment when the vehicle is in a power-off state, and to control the disconnection of the path between the vehicle power module and the power end of the on-board equipment.

[0038] Optionally, in some possible implementations, the vehicle power system further includes a power charging port, which is electrically connected to the power battery pack and the backup battery respectively.

[0039] Optionally, in some possible implementations, when the vehicle is in a charging state, the control module controls the charging of the backup power supply and / or the power battery pack in the vehicle power module through the vehicle charging port.

[0040] Optionally, in some possible implementations, when the vehicle's engine is started, the control module controls the engine to charge the backup power supply and / or the power battery pack in the vehicle power module through the generator.

[0041] Optionally, in some possible implementations, the control module controlling charging of the backup power supply and / or the power battery pack in the vehicle power module includes:

[0042] When the state of charge of the power battery pack is less than a first threshold, only charging the power battery pack;

[0043] When the state of charge of the power battery pack is greater than or equal to a second threshold, supplying power to the power battery pack and the backup power supply;

[0044] The second threshold is greater than the first threshold.

[0045] Optionally, in some possible implementations, it may also include: when the vehicle is in a driving state, the control module controls the power battery pack of the vehicle power module to charge the backup power supply.

[0046] Optionally, in some possible implementations, the control module is further communicatively connected to the vehicle-mounted host and / or the vehicle-mounted communication terminal.

[0047] The control module is further configured to obtain setting parameters sent by the vehicle-mounted host and / or setting parameters sent by the vehicle-mounted communication terminal, and control the discharge parameters of the backup power supply according to the setting parameters.

[0048] Optionally, in some possible implementations, the control module is also used to obtain the power consumption parameters of each vehicle-mounted electrical device, and estimate the power supply status of the backup battery based on the power consumption parameters of each vehicle-mounted electrical device, and send the power supply status to the vehicle-mounted host and / or to the mobile terminal through the vehicle-mounted communication terminal.

[0049] Optionally, in some possible implementations, the backup power supply includes multiple battery packs, which are connected in parallel and / or in series.

[0050] Optionally, in some possible implementations, the battery pack of the backup power source is detachably connected.

[0051] Optionally, in some possible implementations, the backup power supply may further include heat dissipation components such as a heat sink, a fan, or a liquid cooling structure, for controlling the temperature of the backup power supply to prevent the battery pack of the backup power supply from overheating.

[0052] Optionally, in some possible implementations, the control module is also used to obtain historical power consumption data of multiple vehicle-mounted electrical devices connected to the vehicle-mounted device power end, determine the power consumption priority based on the historical power consumption data, and allocate the power consumption of multiple vehicle-mounted electrical devices based on the power consumption priority and the rated power of the backup power supply.

[0053] Optionally, in some possible implementations, the control module is further configured to obtain operating parameters of the backup power supply; and disconnect a charging path or a discharging path electrically connected to the backup power supply when the operating parameters of the backup power supply meet preset conditions.

[0054] In a third aspect, the present application provides a vehicle, comprising the vehicle power supply system in the second aspect.

[0055] In a fourth aspect, the present application provides a control device for a vehicle power supply system, including a power supply switching module, which is used to control the conduction of the path between the backup power supply and the power end of the on-board equipment when the vehicle is in a power-off state, and to control the disconnection of the path between the vehicle power module and the power end of the on-board equipment.

[0056] In a fifth aspect, the present application provides a computer-readable storage medium, which stores computer program code. When the computer program code runs on a computer, the computer executes the above-mentioned related method steps to implement a vehicle power system control method provided in the above-mentioned first aspect.

[0057] In a sixth aspect, the present application provides a computer program product. When the computer program product is run on a computer, it enables the computer to execute the above-mentioned related steps to implement a vehicle power system control method provided in the first aspect.

[0058] Compared with the on-board power supply system of the current vehicle, a backup power supply is added to the vehicle power supply system of the embodiment of the present application. When it is detected that the vehicle is in a power-off state, the vehicle power module is switched to the backup power supply. That is, before the vehicle is powered off, the vehicle circuit is powered by the vehicle power module. At this time, the path between the vehicle power module and the power-consuming end of the on-board equipment is connected. When it is detected that the vehicle is in a power-off state, the path between the backup power supply and the power-consuming end of the on-board equipment is controlled to be connected, and the path between the vehicle power module and the power-consuming end of the on-board equipment is controlled to be disconnected. After the vehicle is powered off, the backup power supply supplies power to the power-consuming end of the on-board equipment. The backup power supply in the present application is independent of the battery of the vehicle power module and only supplies power to on-board electrical equipment, such as the on-board USB interface, the on-board 220V socket, the on-board wireless charging, etc., after the vehicle is powered off. The backup power supply is independent of the battery of the vehicle power module, which is equivalent to physical isolation. The backup power supply only works after the vehicle is powered off and does not participate in the startup power supply. The battery in the vehicle power module is used to supply the instantaneous high current during engine startup and is no longer used to power onboard electrical devices after the vehicle is powered off. This prevents the battery in the vehicle power module from over-discharge damage caused by continuous discharge, extending its cycle life. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0060] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] Figure 1 A schematic flow chart of a method for controlling a vehicle power system according to an embodiment of the present application;

[0062] Figure 2 A schematic structural diagram of a vehicle power supply system provided in an embodiment of the present application;

[0063] Figure 3 A schematic structural diagram of another vehicle power supply system provided in an embodiment of the present application;

[0064] Figure 4 A schematic structural diagram of a control device for a vehicle power system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0066] In the context of the development of intelligent and connected vehicles, the performance and reliability of the on-board power system, as the core infrastructure supporting the operation of electronic devices in the vehicle, directly affect the user experience. With the continuous growth of car ownership and the widespread use of portable electronic devices, car owners' functional requirements for on-board power are becoming more diversified, covering various power usage scenarios such as on-board USB ports, 220V AC power sockets, and wireless charging devices. However, existing on-board power systems are limited by power supply control logic. When the vehicle is powered off, the power supply circuit for non-essential loads is cut off, causing the above-mentioned charging function to fail immediately, and it cannot meet the user's demand for continuous power supply for electronic devices when the vehicle is powered off.

[0067] The current, commonly adopted solution is to directly use the battery in the vehicle's onboard power module, such as a power battery or storage battery, to charge the user's electronic devices. However, this approach has significant drawbacks. First, the design characteristics of the battery in the onboard power module dictate that it is primarily designed to supply instantaneous high current during engine startup and is not suited for long-term, continuous discharge, especially prolonged low-power discharge. Forcing it to serve as a continuous power source can lead to deep discharge of the battery or continuous discharge of the power battery, significantly shortening its cycle life. Second, frequent and unreasonable charge and discharge cycles can cause irreversible damage to the battery, reducing its capacity and charge / discharge efficiency, negatively impacting the vehicle's starting performance and electronic system stability. This is also true for the power battery. Furthermore, excessive battery discharge or continuous low-power discharge of the power battery can lead to cascading failures such as abnormal power supply to the vehicle's electronic control unit and false alarms in the safety system, seriously compromising the vehicle's safety and reliability. Therefore, a new vehicle power system is urgently needed that effectively addresses the issue of continuous power supply after the vehicle is powered off, while ensuring the normal service life of the vehicle battery.

[0068] The present application provides a control method for a vehicle power system. The vehicle includes a backup power supply, a vehicle power module and a control module, and at least one vehicle-mounted device power terminal. Figure 1This is a schematic flow chart of a control method for a vehicle power system provided in an embodiment of the present application. This method can be applied to the application scenario of powering on-board equipment when the vehicle is powered off. The control module in this method can be implemented by the control device of the vehicle power system, or as an independent control unit in the vehicle power system, such as a backup power control unit. The control module can also be implemented in software, firmware and / or hardware. Figure 1 As shown, the method includes:

[0069] S101. When the vehicle is in a power-off state, control the path between the backup power supply and the power-consuming end of the on-board equipment to be connected, and control the path between the vehicle power module and the power-consuming end of the on-board equipment to be disconnected.

[0070] When the vehicle is powered on, the generator runs and supplies power to the main circuit (such as the vehicle power module and engine control system). When the vehicle is powered off, the generator stops working, and the power supply circuits of the cigarette lighter and USB interface are cut off to avoid unnecessary power consumption. In the prior art, for example, when the vehicle's electronic control unit (ECU) detects a power-off signal, it can cut off peripherals such as the cigarette lighter and entertainment system. If the peripherals are not cut off, for example, a USB interface with a power of 5W will consume 10Ah of power if it works continuously for 10 hours, which may cause the battery in the vehicle power module to be over-discharged.

[0071] The battery in the vehicle's power module primarily provides instantaneous high current for starting the engine, rather than continuous discharge. When the battery charge falls below a certain percentage of its rated capacity (deep discharge), the plates undergo "sulfation," resulting in permanent capacity decay. After the battery capacity decays, insufficient output current can occur during startup, potentially reducing the starter's speed and making it difficult for the engine to ignite. If the battery remains depleted for an extended period, the generator will need to be charged with a higher current the next time it's started. This can increase the load on the generator, shorten its lifespan, and increase engine fuel consumption (the generator is driven by the engine belt, and increased load consumes more power).

[0072] Therefore, a backup power supply is added to the vehicle power supply system of the embodiment of the present application. When it is detected that the vehicle is in a power-off state, the power supply is switched from the vehicle power module to the backup power supply. That is, before the vehicle is powered off, the vehicle circuit is powered by the vehicle power module, and at this time, the path between the vehicle power module and the power-consuming end of the on-board equipment is connected. When it is detected that the vehicle is in a power-off state, the path between the backup power supply and the power-consuming end of the on-board equipment is controlled to be connected, and the path between the vehicle power module and the power-consuming end of the on-board equipment is controlled to be disconnected. After the vehicle is powered off, the backup power supply supplies power to the power-consuming end of the on-board equipment.

[0073] Among them, the power-consuming end of the vehicle-mounted equipment may include, for example, an on-board USB charging port, a vehicle-mounted 220V power socket, a vehicle-mounted wireless charger, etc. The embodiment of the present application does not limit the type and number of the power-consuming end of the vehicle-mounted equipment.

[0074] The backup power supply in this embodiment is independent of the vehicle's battery and, combined with intelligent power management logic, ensures continuous power supply to onboard electrical devices even after the vehicle is powered off, while also avoiding the battery overdischarge problem of traditional solutions. Its core principle is to establish a dual power supply circuit: "vehicle power module - backup power supply," and to implement intelligent power switching and energy management through logic control.

[0075] When the vehicle is powered on, the vehicle's generator supplies power and simultaneously charges the vehicle's power module. At this point, the vehicle's power system provides electrical energy to the vehicle's circuits. When a user uses an onboard electrical device through the onboard device power terminal, the vehicle's power module provides power. The backup battery in this application is independent of the battery in the vehicle's power module and only powers onboard electrical devices (such as the onboard USB port, onboard 220V socket, and onboard wireless charging) after the vehicle is powered off.

[0076] In the embodiment of the present application, the backup battery and the battery of the vehicle power module are independent of each other, equivalent to physical isolation. The backup battery only works after the vehicle is powered off and does not participate in the startup power supply. The battery of the vehicle power module is used to supply instantaneous high current when the engine is started and no longer participates in the power supply to the onboard electrical equipment after the vehicle is powered off. Therefore, it can avoid over-discharge damage to the battery due to continuous discharge and extend its cycle life. The embodiment of the present application can automatically switch to the circuit that provides power to the power end of the onboard equipment according to the vehicle status, without manual intervention, and has high system reliability.

[0077] In some optional embodiments, the control method of the vehicle power system provided in the embodiment of the present application may also include: when the vehicle is in a charging state, charging the backup power supply and / or the power battery pack in the vehicle power module through the vehicle charging port.

[0078] When a user charges the vehicle through the vehicle charging port, in order to achieve timely charging of the battery in the backup power supply, that is, the backup battery, and avoid insufficient power of the backup battery when the vehicle is powered off, the embodiment of the present application can control the charging of the backup battery and / or the power battery pack in the vehicle power module through the vehicle charging port when the vehicle is in a charging state.

[0079] For EV (Electric Vehicle) and PHEV (Plug-in Hybrid Electric Vehicle), when charging the entire vehicle, the backup battery and the vehicle's power battery pack can be charged, for example, the backup battery and the power battery pack can be designed as a parallel charging circuit.

[0080] This solution enables the coordinated charging of the vehicle's power battery pack and backup battery using the power from the charging station, enabling dual-battery synchronous charging. For example, the charging circuit topology for the power battery pack is: charging station - onboard charger - power battery; the charging circuit topology for the backup battery is: onboard charger - DC-DC converter - backup battery.

[0081] It should be noted that the embodiment of the present application does not limit the charging order of the backup battery and the power battery, and the power distribution. In actual use, the charging order and charging power can be set according to actual needs.

[0082] For PHEV (Plug-in Hybrid Electric Vehicle), if the engine has fully charged the vehicle's power battery pack through the generator while the vehicle is driving, the backup battery can be charged separately when the user charges the vehicle through the vehicle charging port.

[0083] In the embodiment of the present application, when the vehicle is in a charging state, the backup battery and / or the power battery pack in the vehicle power module are charged through the vehicle charging port, so that the backup battery can be replenished in time so that after the vehicle is powered off, the backup battery has sufficient power to supply power to the power-consuming end of the on-board equipment.

[0084] In some optional embodiments, the control method of the vehicle power system provided in the embodiments of the present application may also include: when the vehicle's engine is started, controlling the engine to charge the backup power supply and / or the power battery pack in the vehicle power module through the generator.

[0085] In the embodiment of the present application, when the engine is started, the generator converts the engine mechanical energy into electrical energy to charge the power battery pack and / or the backup battery, forming an energy closed loop of "engine-generator-dual battery".

[0086] When the engine of a fuel vehicle is started and in driving, the engine acts as a power source to drive the generator to generate electricity. After the electricity generated by the generator meets the basic power needs of the vehicle itself (such as lighting, ECU operation, etc.), the surplus electricity is directed to the backup battery. The entire process is based on the mechanical transmission relationship between the engine and the generator, as well as the transmission and distribution of electrical energy by the circuit. It realizes that during the driving of the vehicle, the mechanical energy generated by the engine operation is converted into electrical energy to replenish the backup battery to meet the demand of the backup battery to power the on-board electrical equipment after the vehicle is powered off. The present application can utilize the characteristic of the engine driving the generator to generate electricity when it is running. Under the premise of ensuring that the basic power consumption of the vehicle and the power of the starting battery are not affected, the surplus electricity is charged into the backup battery in an orderly manner to achieve rational use of energy. The backup battery is replenished with electricity during the driving of the vehicle to meet the power demand after the vehicle is powered off.

[0087] When a hybrid vehicle's engine is started, it also drives the generator to generate electricity. Unlike fuel-powered vehicles, hybrid vehicles have two energy storage units: a power battery and a backup battery. The electricity generated by the generator is transmitted through a circuit system to both the backup battery and the power battery. During this process, the engine's mechanical energy is converted into electrical energy. The circuit distribution mechanism enables simultaneous charging of both batteries, ensuring that the power battery provides power for vehicle operation and the backup battery provides power for other onboard devices after the vehicle is powered down.

[0088] For gasoline and hybrid vehicles, charging the backup battery while the engine is running ensures it maintains a high charge level. When the vehicle is powered off, the backup battery can immediately power the onboard USB ports, 220V power outlets, wireless chargers, and other devices, meeting the user's need for continuous charging of electronic devices while parked, avoiding situations where the backup battery is insufficient to provide power.

[0089] In fuel vehicles, the backup battery is charged while driving, eliminating the need for previous reliance on the starting battery, such as when the battery is used to power onboard devices. This reduces the number and depth of discharges required for the starting battery, effectively extending its service life and reducing the risk of performance degradation due to frequent battery charging and discharging. In hybrid vehicles, the backup battery is charged simultaneously with the power battery, distributing generator power, preventing overcharging or frequent charging and discharging of the power battery, helping to maintain stable power battery performance and improving the overall reliability of the hybrid vehicle. In the embodiments of the present application, by charging the backup battery while driving, the backup battery can provide stable power support for onboard electrical devices for a longer period of time after the vehicle is powered off, significantly improving the user's power consumption experience after the vehicle is powered off, for example, meeting the needs of diverse power usage scenarios such as outdoor office work and camping.

[0090] In both vehicle types, during engine operation, electricity that would otherwise be wasted is used to charge the backup battery (for gasoline-powered vehicles) or the backup battery and power battery (for hybrid vehicles), achieving secondary energy utilization. This not only reduces energy waste but also makes energy utilization more efficient and reasonable, reducing vehicle operating costs to a certain extent.

[0091] In some optional embodiments, charging the backup power supply and / or the power battery pack in the vehicle power module includes:

[0092] When the state of charge of the power battery pack is less than a first threshold, charging the power battery pack;

[0093] When the state of charge of the power battery pack is greater than or equal to a second threshold, supplying power to the power battery pack and the backup power supply;

[0094] The second threshold is greater than the first threshold.

[0095] In this embodiment, the state of charge (SOC) of the power battery pack is acquired in real time, and a step-by-step priority control logic is formed by setting two thresholds (a first threshold and a second threshold).

[0096] The state of charge of the power battery pack is compared with a preset first threshold and a second threshold, wherein the first threshold is less than the second threshold. If the state of charge of the power battery pack is less than the first threshold, the power battery pack is charged and the backup battery charging circuit is disconnected. If the state of charge of the power battery pack is greater than or equal to the second threshold, the backup battery is charged and the power battery pack charging circuit is maintained in a trickle charging state. In an optional embodiment, if the state of charge of the power battery pack is greater than or equal to the first threshold and less than the second threshold, the dual batteries can be charged simultaneously, with the power battery pack being allocated the main charging power and the backup battery being allocated the remaining power. In another optional embodiment, the control module can selectively charge one or both of the power battery pack and the backup battery based on one or more of a plurality of conditions, such as the SOC of the power battery pack and the backup battery pack, the vehicle charging status, and user settings. In another optional embodiment, when the power battery pack is fully charged, only the backup battery can be charged.

[0097] The first threshold acts as a safety margin, ensuring that when the power battery pack's state of charge falls below this value, energy is given priority for recharging, ensuring basic driving needs. The second threshold acts as a switching point, automatically transferring charging energy to the backup battery when the power battery pack is close to full charge, preventing overcharging and loss of the power battery pack.

[0098] By limiting the power battery pack to charge first through the first threshold, it is ensured that the power battery pack always maintains the lowest state of charge (such as SOC ≥ 80%), reducing the risk of breakdown due to power exhaustion, avoiding the backup battery and the power battery pack from competing for charging resources, and ensuring that the vehicle power system has priority in restoring power. The setting of the above threshold can also enable the backup battery to be charged in a high SOC state of the power battery pack, avoiding high temperature and high current charging environment, and extending the service life. In the stage above the second threshold, the surplus charging energy is stored in the backup battery, which can also reduce the standby loss of the charging pile.

[0099] The embodiment of the present application achieves safe and efficient management of dual battery charging through threshold-triggered priority control without increasing hardware complexity, and is particularly suitable for new energy vehicles with high requirements for endurance reliability.

[0100] In some optional embodiments, multiple thresholds may be selected as control nodes of the charging mode to provide flexible charging management.

[0101] In some optional embodiments, the control method of the vehicle power system may further include: when the vehicle is in a driving state, controlling the power battery pack of the vehicle power module to charge the backup power supply.

[0102] When the vehicle is in motion, the power battery pack serves as the primary power source, powering the drive motor and onboard devices. During this process, if excess energy is available, the system, through built-in circuitry and control logic, transfers the excess energy to a backup battery for storage. This process requires no additional energy input and utilizes only the "excess power capacity" of the power battery pack while the vehicle is in motion, achieving secondary energy utilization.

[0103] The embodiment of the present application controls the power battery pack to charge the backup battery while the vehicle is running, ensuring that the backup battery always maintains a high level of power, avoiding the inability to power on-board electrical equipment (such as USB ports, 220V sockets) after the vehicle is powered off due to exhaustion of power, thereby improving the user's power experience. The embodiment of the present application can also fully recycle the "redundant power" of the power battery pack to reduce energy waste. For example, when the vehicle is traveling at a constant speed, the power demand of the drive motor is stable. At this time, the surplus power is charged into the backup battery, which can effectively improve the energy utilization rate of the entire vehicle. The solution of the embodiment of the present application does not require the modification of the core components of the vehicle, and can be achieved only through software control or circuit switching. It is suitable for a variety of new energy vehicle models (such as EV, PHEV), reducing the cost of technical transformation.

[0104] In some optional implementations, the control method of the vehicle power system may further include:

[0105] Obtaining setting parameters sent by the vehicle host and / or the vehicle communication terminal, and controlling the discharge parameters of the backup power supply based on the setting parameters;

[0106] and / or,

[0107] Obtain power consumption parameters of each on-board power-consuming device connected to the power-consuming terminal of the on-board device;

[0108] The power supply status of the backup power supply is estimated based on the power consumption parameters, and the power supply status is sent to the vehicle host and / or to the mobile terminal via the vehicle communication terminal.

[0109] In an embodiment of the present application, the control module can also be communicatively connected to the vehicle-mounted host and / or the vehicle-mounted communication terminal. The control module and the vehicle-mounted host and / or the vehicle-mounted communication terminal can communicate with each other through, for example, CAN communication, thereby obtaining the setting parameters sent by the vehicle-mounted host and / or the vehicle-mounted communication terminal. The user can remotely set the setting parameters from the vehicle-mounted host, and the vehicle-mounted host sends the user's setting parameters to the control module. The user can also remotely set the setting parameters through a mobile terminal, and the mobile terminal sends data to the vehicle-mounted communication terminal via the cloud, and the vehicle-mounted communication terminal sends the user's setting parameters to the control module via CAN communication. The control module can control the discharge parameters of the backup battery based on these setting parameters. In some optional embodiments, the setting parameters may include configuration parameters corresponding to different vehicle states. Different vehicle states may include general power-off mode, camping mode, maintenance mode, repair mode, etc. In other optional embodiments, the discharge parameters may be discharge power, discharge time, or configuration of one or more vehicle-mounted device power terminals that allow discharge. In multiple optional embodiments, in general power-off mode, the setting parameter can be a preset discharge time of the backup power supply. Before the backup power supply reaches the preset discharge time, the vehicle interface or the mobile device prompts the user that the preset discharge time has been reached, and waits for the user to instruct to continue discharging to the next time point or terminate the discharge. In camping mode, the setting parameter can be a combination of multiple discharge times and discharge powers. The combination can be related to the total power of the backup battery, and when the user uses the backup power supply, the output power of the backup battery is controlled according to the remaining power of the backup battery. For example, when the user uses the vehicle power supply to power a high-power electrical device such as an electric oven, the power supply time is limited, and the vehicle interface or the user's mobile device prompts the user of the available power supply time.

[0110] As a local interactive terminal, the vehicle computer provides a visual operation interface (such as touch screen, voice commands), and users can directly enter setting parameters such as discharge time; the on-board communication terminal can communicate with the user's mobile terminal through the cloud, allowing users to set parameters remotely. When the vehicle is powered off and the backup battery is triggered to supply power, the control module can accurately control the discharge parameters of the backup battery according to the setting parameters obtained from the on-board host and / or the on-board communication terminal, thereby achieving precise control of power output. Users can flexibly set the discharge time according to actual needs (such as camping duration, equipment usage plan) to avoid wasting electricity or premature exhaustion. With the help of the on-board communication terminal, users can also adjust the discharge parameters when they are away from the vehicle. For example, when temporarily changing the itinerary plan, you can shorten the discharge time through the mobile phone APP to ensure that the remaining power meets subsequent needs.

[0111] In an optional embodiment, the control method of the vehicle power system may further include:

[0112] Receive travel plans and electricity usage plans set by users;

[0113] receiving a preset charging period for the vehicle;

[0114] Based on the travel plan, power consumption plan and preset charging period, the expected remaining power curve of the backup power supply is calculated, and at least one of the charging power, charging time, discharging power and discharging time of the backup power supply is adjusted based on the expected remaining power of the backup power supply. At the same time, the adjusted backup battery usage parameters are displayed through the vehicle computer or mobile device.

[0115] In an optional embodiment, the vehicle computer can generate one or more charging plans based on the user's travel and electricity usage plans and a digital map containing charging station data. The charging plans can include information such as charging time, charging power, and charging location for the user to select. The vehicle computer can calculate the expected remaining power curve of the backup power supply based on the user's selected charging plan and adjust the backup power supply usage parameters based on the expected remaining power.

[0116] In one alternative embodiment, the user's travel and electricity plan settings can be accessed through the vehicle's user interface or the user's mobile device. In another alternative embodiment, the vehicle's preset charging period can be a pre-stored preset charging period in the vehicle's central hub. In yet another alternative embodiment, the preset charging period can be derived from an algorithmic model through machine learning to understand the user's vehicle usage habits.

[0117] The aforementioned optional embodiments, by combining user needs with vehicle charging plans, allow for more flexible control of the backup power supply's power and duration, allowing for flexible adjustment of charging and discharging times. This ensures both user power requirements and safety, significantly improving the user experience in vehicle power-off scenarios. Compared to current vehicle power systems, this reduces unnecessary charging time and significantly reduces the likelihood of failing to meet user power needs.

[0118] In the embodiment of the present application, the setting method of the vehicle-mounted host and the vehicle-mounted communication terminal covers local and remote scenarios, is easy to operate and has strong compatibility, adapts to the usage habits of different users, and can enhance the product's intelligent attributes and competitiveness.

[0119] It should be noted that the above-mentioned setting parameters may include, for example, the charging time of the backup battery, the scheduled usage time of the backup power supply, etc.

[0120] Optionally, the embodiment of the present application can also obtain the power consumption parameters of the vehicle-mounted power equipment connected to the power end of the vehicle-mounted equipment, estimate the power supply status of the backup battery based on the power consumption parameters, and send it to the vehicle-mounted host and / or send it to the mobile terminal through the vehicle-mounted communication terminal.

[0121] For example, the power consumption of the on-board electrical equipment connected to the power end of the on-board equipment is obtained, and the remaining usable time of the backup battery is estimated based on the current power of the backup battery and the power consumption of the on-board electrical equipment connected to the power end of the on-board equipment. The prompt is sent to the on-board host and / or to the mobile terminal through the on-board communication terminal to prompt the user.

[0122] The control module is communicatively connected to the vehicle-mounted host and / or the vehicle-mounted communication terminal. The control module can be connected to the entire vehicle via CAN communication, receive the vehicle's CAN data, the setting parameters of the vehicle-mounted host, and the setting parameters of the vehicle-mounted communication terminal, and feed back the working status of the backup battery to the entire vehicle, and display it to the user through the vehicle-mounted host and / or the vehicle-mounted communication terminal.

[0123] The embodiment of the present application transmits data to the vehicle host via the CAN bus, which can realize local visual display; at the same time, the control module uploads the data to the cloud via the vehicle communication terminal, and the cloud then pushes the information to the user's mobile phone. The user can intuitively obtain the status of the backup battery through the vehicle host or mobile phone APP. The entire process relies on the vehicle's existing communication architecture to achieve real-time synchronization of data and multi-terminal sharing. The user can always grasp key information such as the power level of the backup battery to avoid the risk of device power outage or battery overheating due to power depletion. For example, check the remaining power of the backup battery through the mobile phone APP and plan the usage time of electrical equipment in advance. Based on real-time data monitoring, when the backup battery is in an abnormal state, the control unit can remind the user through a pop-up window on the vehicle host or a mobile phone push notification, facilitating timely troubleshooting, reducing the probability of backup battery damage, and improving system safety. Even if the vehicle is not nearby, the user can still remotely check the status of the backup battery through the mobile phone, meeting the real-time management needs in scenarios such as outdoor work and long-distance travel, and improving the intelligence and convenience of the car experience.

[0124] In some optional embodiments, the control method of the vehicle power supply system may further include: determining a power usage priority based on historical power usage data of each of a plurality of vehicle-mounted electrical devices connected to the vehicle-mounted device power supply;

[0125] The power consumption of multiple on-board electrical devices is distributed according to the power consumption priority and the rated power of the backup battery.

[0126] The historical power consumption data of multiple on-board electrical devices can be, for example, the frequency and duration of use of multiple on-board electrical devices through different interfaces (such as USB, Type-C, and 220V sockets). Based on historical data, the charging priority of each interface is calculated. If the frequency of use of an interface (such as USB) exceeds a preset threshold, the on-board electrical device connected through the interface is defined as a high charging priority device. According to the charging priority ranking, the charging power of the backup battery to each on-board electrical device is dynamically adjusted. High charging priority devices are given priority to obtain sufficient power, and low charging priority devices are allocated the remaining power.

[0127] The embodiment of the present application can establish a profile of the user's electricity usage habits by continuously monitoring the usage data of each interface, and can also update historical data through a preset algorithm to ensure that the charging priority allocation adapts to the user's latest habits.

[0128] The embodiments of the present application can automatically identify devices that users use frequently, prioritize charging needs, reduce the need to manually switch devices, and improve convenience. By allocating charging priorities, it prevents low-charging priority devices from occupying too much power, allowing the backup battery energy to be used more efficiently for core devices. High-charging priority devices obtain stable power input, avoiding decreased charging efficiency and battery heating due to power fluctuations. There is no need for users to manually configure charging priorities, the system adaptively learns power usage habits, is compatible with new and old devices, and lowers the threshold for use. The embodiments of the present application support intelligent scheduling when multiple on-board electrical devices are charging at the same time, such as automatically balancing power distribution when powering a mobile phone (USB), a laptop (Type-C), and a car refrigerator (220V) at the same time.

[0129] In some optional implementations, the method for controlling a vehicle power system may further include:

[0130] Obtain the operating parameters of the backup power supply;

[0131] When the operating parameters of the backup power supply meet the preset conditions, the charging path or the discharging path electrically connected to the backup power supply is disconnected.

[0132] The embodiment of the present application can monitor the operating parameters of the backup battery in real time. If the operating parameters of the backup battery meet the preset conditions, it means that the backup battery is operating abnormally, so the charging path or the discharging path of the backup battery electrical connection is disconnected, effectively improving the safety and service life of the backup battery.

[0133] Alternatively, for example, the voltage, current, and temperature parameters of the backup battery can be collected in real time and compared with preset overcharge thresholds, over-discharge thresholds, and temperature safety ranges. If the comparison result indicates that the backup battery is malfunctioning, the charging or discharging path electrically connected to the backup battery can be disconnected. For example, when the voltage exceeds the overcharge threshold and / or the current exceeds the charging current threshold, the charging path is disconnected. When the voltage falls below the over-discharge threshold and / or the current exceeds the discharging current threshold, the discharging path is disconnected. When the temperature exceeds the safety range, both the charging and discharging paths are disconnected.

[0134] Specifically, voltage, current, and temperature sensors can be used to collect real-time data on the backup battery's voltage, current, and temperature. These data can then be compared with pre-set safety thresholds, including overcharge and over-discharge thresholds, and temperature safety ranges. Multi-sensor fusion technology can be used to collect voltage, current, and temperature data to form a safety monitoring network.

[0135] A voltage sensor monitors the backup battery voltage to prevent overcharging. When the battery voltage reaches the preset maximum safety voltage, the charging circuit is disconnected, preventing further current from flowing into the battery. A voltage sensor monitors the backup battery voltage. When the voltage drops to the preset minimum safety voltage, the discharge circuit is disconnected, preventing current from flowing out of the backup battery. The above uses voltage as an example for over-discharge and over-charge protection control. Similarly, using a current sensor to monitor the backup battery current to prevent overcharging or over-discharging is similar and will not be further described in detail in this embodiment of the present application.

[0136] This embodiment of the application uses overcharge / over-discharge protection to control the backup battery's charge and discharge depth within a safe range, thereby improving its cycle life. A thermal runaway prevention mechanism controls battery temperature within a safe threshold, reducing the risk of thermal runaway. These thresholds can be adjusted based on the backup battery type, age, and ambient temperature.

[0137] In addition, the present application also provides a vehicle power supply system. Figure 2 As shown, Figure 2 This is a structural diagram of a vehicle power supply system provided in an embodiment of the present application. The vehicle power supply system provided in an embodiment of the present application includes a backup power supply 10, a vehicle power module 20 and a control module 30.

[0138] The control module 30 is electrically connected to the backup power supply 10 and the vehicle power module 20. When the vehicle is powered off, the control module 30 is used to control the connection between the backup power supply 10 and the vehicle device power terminal 40, and to control the disconnection between the vehicle power module 20 and the vehicle device power terminal 40.

[0139] The control module in the embodiment of the present application may be, for example, a controller for controlling the power on and off of the vehicle, or an additional controller. When the control module determines that the vehicle is in the power off state,

[0140] The vehicle power module is the core energy supply unit of the vehicle's power system, and may include, for example, a power battery pack, a DC-DC converter, a storage battery, a power management unit, etc. The power battery pack is the primary energy source for the vehicle while it is in motion, powering high-voltage loads such as the drive motor and the air-conditioning compressor. The DC-DC converter is used to convert the high-voltage direct current from the power battery pack into low-voltage direct current to power low-voltage electrical equipment on board. The type of storage battery may be, for example, a lead-acid battery, which powers the starter motor when the vehicle is started. The power management unit is used to monitor the status of the power battery pack and control the charging and discharging strategy.

[0141] When the vehicle is powered on, the vehicle power module supplies power to the vehicle circuits. At this point, the path between the vehicle power module and the onboard equipment power terminals is open. When the vehicle is powered off (e.g., when the ignition is off, the key is removed, or the electronic key sensor fails), the control module disconnects the path between the vehicle power module and the onboard equipment power terminals and switches the path between the backup battery and the onboard equipment power terminals to open, achieving a seamless connection between the backup battery and the vehicle power module. After the vehicle is powered off, the backup battery supplies power to the onboard equipment power terminals.

[0142] The backup battery in the embodiments of this application is a backup power source independent of the vehicle battery. It only powers onboard electrical devices (such as the onboard USB port, onboard 220V socket, and onboard wireless charging) after the vehicle is powered off and does not contribute to the startup power supply. The battery in the vehicle power module is used to supply instantaneous high current during engine startup and does not contribute to the power supply of onboard electrical devices after the vehicle is powered off. This can prevent over-discharge damage to the battery due to continuous discharge and extend its cycle life.

[0143] For example, the backup battery power supply path can be connected by controlling the closure of a low-voltage relay (such as the backup battery output relay) to establish an electrical connection between the backup battery and the power supply terminal of the on-board equipment. The vehicle power module path can be disconnected by controlling the closure of a high-voltage relay and a DC-DC converter power supply relay to cut off the energy transmission path from the power battery to the DC-DC converter and then to the low-voltage system.

[0144] In some optional embodiments, the control module is further communicatively connected to the vehicle-mounted host and / or the vehicle-mounted communication terminal.

[0145] The control module is further configured to obtain setting parameters sent by the vehicle-mounted host and / or setting parameters sent by the vehicle-mounted communication terminal, and control the discharge parameters of the backup battery according to the setting parameters.

[0146] like Figure 3 As shown, in the embodiment of the present application, the control module 30 can also be connected to the vehicle host 50 and / or the vehicle communication terminal 60 (TBOX, also called T-box). The control module 30 and the vehicle host 50 and / or the vehicle communication terminal 60 can communicate with each other through, for example, CAN communication to exchange data, thereby obtaining the setting parameters sent by the vehicle host 50 and / or the vehicle communication terminal 60. The user can remotely set the setting from the vehicle host 50, and the vehicle host 50 sends the user's setting parameters to the control module 30. The user can also remotely set the setting through a mobile terminal 70. The mobile terminal 70 is installed with an APP for controlling the vehicle. The user operates the APP to send data to the vehicle communication terminal 60 through the cloud 80, and the vehicle communication terminal 60 sends the user's setting parameters to the control module 30 through CAN communication. The control module 30 can control the discharge parameters of the backup battery 10 based on these setting parameters.

[0147] In the embodiment of the present application, the setting method of the vehicle-mounted host and the vehicle-mounted communication terminal covers local and remote scenarios, is easy to operate and has strong compatibility, adapts to the usage habits of different users, and can enhance the product's intelligent attributes and competitiveness.

[0148] In some optional embodiments, the control module is also used to obtain the power consumption parameters of each vehicle-mounted electrical device, and estimate the power supply status of the backup power supply based on the power consumption parameters of the vehicle-mounted electrical device, and send it to the vehicle-mounted host and / or send it to the mobile terminal through the vehicle-mounted communication terminal.

[0149] The embodiment of the present application transmits data to the vehicle host via the CAN bus, enabling local visual display. Simultaneously, the control module uploads the data to the cloud via the vehicle communication terminal, which then pushes the information to the user's mobile phone. Users can intuitively access the backup battery status through the vehicle host or mobile phone app. The entire process relies on the vehicle's existing communication architecture, enabling real-time data synchronization and multi-terminal sharing. Users can keep track of key information such as the backup battery charge level at all times, avoiding the risk of device power outages or battery overheating due to battery depletion.

[0150] In some optional embodiments, the backup power supply includes multiple battery packs, which are connected in parallel and / or in series.

[0151] The backup battery in the embodiments of the present application can, for example, be a plurality of battery packs connected in parallel and / or in series, which can increase the total capacity and voltage of the backup battery, while distributing the load of each individual battery pack, thereby improving the stability and life of the overall system. The backup battery in the embodiments of the present application can, for example, be a high-capacity, long-life lithium battery to ensure that sufficient power can be provided to the onboard electrical devices after the vehicle is powered off. For example, the capacity can be selected from 10Ah to 20Ah according to actual usage requirements.

[0152] In some optional embodiments, the battery pack of the backup battery is removably connected.

[0153] The backup battery design in the embodiments of the present application allows a single battery pack to be replaced without damaging the entire system, thereby simplifying the maintenance and upgrade process and extending the overall service life.

[0154] In some optional embodiments, the backup battery may further include heat dissipation components such as a heat sink, a fan, or a liquid cooling structure, for controlling the temperature of the backup battery to prevent the backup battery from overheating.

[0155] In some optional embodiments, the backup battery may be provided with a housing, for example, made of high-strength material (metal or high-strength plastic) to protect the internal components of the backup battery from physical damage, moisture, and extreme temperatures.

[0156] In some optional embodiments, key components in the backup battery, such as power converters, controllers, etc., can adopt a redundant design, that is, at least one key component with the same function is included. Even if one key component fails, the backup battery can still operate normally, thereby improving reliability.

[0157] In some optional embodiments, the control module is also used to obtain historical power consumption data of multiple vehicle-mounted electrical devices connected to the vehicle-mounted device power terminal, and allocate the power consumption of multiple vehicle-mounted electrical devices according to the charging priority and the rated power of the backup battery.

[0158] The embodiments of the present application can build a profile of a user's power usage habits by continuously monitoring usage data from each interface. For example, it can automatically identify the user's frequently used devices, prioritize charging needs, reduce the need for manual device switching, and improve convenience. By allocating charging priorities, it prevents low-priority devices from consuming excessive power, allowing backup battery energy to be used more efficiently for core devices.

[0159] In some optional implementations, the control module is further configured to obtain operating parameters of the backup battery; and disconnect a charging path or a discharging path electrically connected to the backup battery based on whether the operating parameters of the backup battery meet preset conditions.

[0160] The embodiment of the present application can monitor the operating parameters of the backup battery in real time. If the operating parameters of the backup battery meet the preset conditions, it means that the backup battery is operating abnormally, so the charging path or the discharging path of the backup battery electrical connection is disconnected, effectively improving the safety and service life of the backup battery.

[0161] Optionally, the control module in this embodiment of the present application may be equipped with at least one of a voltage sensor, a current sensor, and a temperature sensor to collect the backup battery's voltage, current, and temperature in real time and compare the collected parameters with preset safety thresholds, including overcharge thresholds, over-discharge thresholds, and temperature safety ranges. Multi-sensor fusion technology is used to collect the three-dimensional parameters of voltage, current, and temperature, forming a safety monitoring network.

[0162] The system collects the backup battery's voltage, current, and temperature parameters in real time and compares these parameters with preset overcharge and over-discharge thresholds and a temperature safety range. If the comparison indicates abnormal operation of the backup battery, the system disconnects the charging or discharging path electrically connected to the backup battery. For example, the charging path is disconnected when the voltage exceeds the overcharge threshold and / or the current exceeds the charging current threshold. The discharging path is disconnected when the voltage falls below the over-discharge threshold and / or the current exceeds the discharging current threshold. Both the charging and discharging paths are disconnected when the temperature exceeds the safety range.

[0163] This embodiment of the application uses overcharge / over-discharge protection to control the backup battery's charge and discharge depth within a safe range, thereby improving its cycle life. A thermal runaway prevention mechanism controls battery temperature within a safe threshold, reducing the risk of thermal runaway. These thresholds can be adjusted based on the backup battery type, age, and ambient temperature.

[0164] In some optional embodiments, the vehicle power supply system further includes a power charging port, which is electrically connected to the power battery pack and the backup battery respectively.

[0165] See also Figure 3 When the user charges the vehicle through the vehicle charging port 90, in order to realize timely charging of the backup battery and avoid insufficient power of the backup battery 10 when the vehicle is powered off, the embodiment of the present application can control the charging of the backup battery 10 and / or the power battery pack 21 in the vehicle power module 20 through the vehicle charging port 90 when the vehicle is in the charging state.

[0166] In some optional embodiments, the control module is also used to control the engine to charge the backup battery and / or the power battery pack in the vehicle power module through the generator after the vehicle engine is started.

[0167] See also Figure 3 In the embodiment of the present application, when the engine is started, the engine mechanical energy is converted into electrical energy through the generator, and the engine control system 100 charges the power battery pack 21 and / or the backup battery 10, forming an energy closed loop of "engine-generator-dual battery".

[0168] In some optional embodiments, the control module is also used to charge the power battery pack based on the state of charge of the power battery pack being less than a first threshold; and to supply power to the backup battery pack based on the state of charge of the power battery pack being greater than or equal to a second threshold; wherein the second threshold is greater than the first threshold.

[0169] The embodiment of the present application achieves safe and efficient management of dual battery charging through threshold-triggered priority control without increasing hardware complexity, and is particularly suitable for new energy vehicles with high requirements for endurance reliability.

[0170] In some optional embodiments, the vehicle power module includes a power battery pack, and the control module is further used to control the power battery pack to charge the backup battery when the vehicle is in driving state.

[0171] The embodiment of the present application controls the power battery pack to charge the backup battery while the vehicle is running, ensuring that the backup battery always maintains a high level of power, avoiding the inability to power onboard electrical devices (such as USB ports and 220V sockets) after the vehicle is powered off due to exhaustion of power, thereby improving the user's power experience. The embodiment of the present application can also fully recycle the "redundant power" of the power battery pack to reduce energy waste. For example, when the vehicle is traveling at a constant speed, the power demand of the drive motor is stable. At this time, charging the remaining power into the backup battery can effectively improve the energy utilization rate of the entire vehicle.

[0172] The present application also provides a control device for a vehicle power system. Figure 4 A schematic diagram of the structure of a control device for a vehicle power system provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the control device 200 of the vehicle power supply system includes a power supply switching module 201, which is used to control the conduction of the path between the backup battery and the power end of the on-board equipment when the vehicle is in a power-off state, and to control the disconnection of the path between the vehicle power module and the power end of the on-board equipment.

[0173] In some optional embodiments, the power supply switching module is also used to charge the backup battery and / or the power battery pack in the vehicle power module through the vehicle charging port when the vehicle is in a charging state.

[0174] In some optional embodiments, the power supply switching module is also used to control the engine to charge the backup battery and / or the power battery pack in the vehicle power module through the generator after the vehicle engine is started.

[0175] In some optional embodiments, the power supply switching module is also used to charge the power battery pack based on the state of charge of the power battery pack being less than a first threshold; and to supply power to the backup battery pack based on the state of charge of the power battery pack being greater than or equal to a second threshold; wherein the second threshold is greater than the first threshold.

[0176] In some optional embodiments, the power supply switching module is also used to control the power battery pack of the vehicle power module to charge the backup battery when the vehicle is in driving state.

[0177] In some optional embodiments, the power supply switching module is further configured to obtain setting parameters sent by the vehicle host and / or the vehicle communication terminal, and control the discharge parameters of the backup battery based on the setting parameters;

[0178] and / or,

[0179] Obtaining power consumption parameters of the on-board power device connected to the power terminal of the on-board device;

[0180] The power supply status of the backup battery is estimated based on the power usage parameters and sent to the vehicle host and / or to the mobile terminal via the vehicle communication terminal.

[0181] In some optional embodiments, the power supply switching module is further configured to determine the charging priority based on historical power consumption data of a plurality of on-board electrical devices connected to the power terminal of the on-board device;

[0182] The power consumption of multiple on-board electrical devices is distributed according to the charging priority and the rated power of the backup battery.

[0183] In some optional implementations, the power supply switching module is further configured to obtain operating parameters of the backup battery; and disconnect the charging path or the discharging path electrically connected to the backup battery based on whether the operating parameters of the backup battery meet preset conditions.

[0184] Regarding the apparatus in the above embodiment, the specific manner in which each unit performs operations has been described in detail in the embodiment of the method, and will not be elaborated on here.

[0185] This embodiment also provides a vehicle, comprising the vehicle power supply system according to any of the above embodiments.

[0186] This embodiment also provides a computer-readable storage medium, which stores computer program code. When the computer program code runs on a computer, the computer executes the above-mentioned related method steps to implement a vehicle power system control method provided by the above embodiment.

[0187] Computer readable storage media can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, include but is not limited to a system, device or component of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0188] This embodiment further provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above-mentioned related steps to implement a vehicle power system control method provided in the above embodiment.

[0189] The computer program product may be written in any combination of one or more programming languages ​​to implement the operations of embodiments of the present invention, including object-oriented programming languages ​​such as Java, C++, and conventional procedural programming languages ​​such as C or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a stand-alone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0190] Among them, the beneficial effects of the above embodiments can refer to the beneficial effects of the corresponding methods provided above, and will not be repeated here.

[0191] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0192] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be coupled or communicated, which can be electrical, mechanical or other forms. They can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0193] In the description of the present disclosure, it should be understood that if the terms "up", "down", "front", "back", "left" and "right" are used to indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations of the present disclosure.

[0194] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should also be noted that the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, commodity, or device comprising the element.

[0195] The above are merely examples of the present disclosure and are not intended to limit the present disclosure. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure are intended to be included within the scope of the claims of the present disclosure.

Claims

1. A method for controlling a vehicle power system, characterized in that: The vehicle includes a backup power supply, a vehicle power module and a control module, and at least one vehicle-mounted device power terminal. The backup power supply is connected in series with the vehicle-mounted device power terminal to power the vehicle-mounted device. The control method of the vehicle power system includes: When the vehicle is in a power-off state, the path between the backup power supply and the power-consuming end of the vehicle-mounted equipment is controlled to be connected, and the path between the vehicle power module and the power-consuming end of the vehicle-mounted equipment is controlled to be disconnected.

2. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: When the vehicle is in a charging state, the backup power supply and / or the power battery pack in the vehicle power module are charged through the vehicle charging port.

3. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: When the engine of the vehicle is started, the engine is controlled to charge the backup power supply and / or the power battery pack in the vehicle power module through the generator.

4. The control method of the vehicle power supply system according to claim 2 or 3, characterized in that: The charging of the backup power supply and / or the power battery pack in the vehicle power module includes: When the state of charge of the power battery pack is less than a first threshold, charging the power battery pack; When the state of charge of the power battery pack is greater than or equal to a second threshold, charging the power battery pack and the backup power supply; The second threshold is greater than the first threshold.

5. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: When the vehicle is in a driving state, the power battery pack of the vehicle power module is controlled to charge the backup power supply.

6. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: Acquire setting parameters sent by the vehicle host and / or the vehicle communication terminal, and control the discharge parameters of the backup power supply based on the setting parameters; and / or, Obtaining power consumption parameters of an on-board electrical device connected to the power terminal of the on-board device; The power supply status of the backup power supply is estimated based on the power consumption parameter, and the power supply status is sent to the vehicle-mounted host and / or to the mobile terminal via the vehicle-mounted communication terminal.

7. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: determining the power usage priority of each of the plurality of on-board electrical devices connected to the on-board device power terminal according to respective historical power usage data of the plurality of on-board electrical devices; The electric power of the plurality of vehicle-mounted electric devices is distributed according to the electric power priority and the rated power of the backup power supply.

8. The control method of the vehicle power supply system according to claim 1, characterized in that: Also includes: Obtaining operating parameters of the backup power supply; When the operating parameters of the backup power supply meet preset conditions, the charging path or the discharging path electrically connected to the backup power supply is disconnected.

9. A vehicle power supply system, characterized in that: include: A backup power supply, a vehicle power module and a control module, wherein the backup power supply is connected in series with the power terminal of the vehicle-mounted equipment to supply power to the vehicle-mounted equipment; The control module is electrically connected to the backup power supply and the vehicle power module respectively; The control module is used to control the connection of the path between the backup power supply and the power-consuming end of the on-board equipment, and to control the disconnection of the path between the vehicle power module and the power-consuming end of the on-board equipment when the vehicle is in a power-off state.

10. A vehicle, characterized in that: A vehicle power supply system comprising the vehicle power supply system according to claim 9.

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