Storage battery feed protection method and device, vehicle and electronic equipment

Abstract

The invention relates to a storage battery feed protection method and device, a vehicle and electronic equipment, relates to the technical field of vehicles, and aims to solve the problem of storage battery feed when the vehicle is in a flameout state or a low-power-consumption state. The method comprises the steps of determining whether a working scene of a vehicle is a calibrated working scene or not when the vehicle is in a flameout state; under the condition that the working scene is the calibrated working scene and the power supply current of the storage battery is greater than the calibrated current, performing power supply limitation on an electricity load in the working scene; wherein the calibration current is the maximum allowable power supply current set for the calibration working scene in order to prevent the storage battery from feeding, the dark current consumption can be effectively reduced under the condition that the current necessary functions of the vehicle are met, and the problem of low-voltage storage battery feeding is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a battery power supply protection method, device, vehicle, and electronic equipment. Background Technology

[0002] In the modern automotive industry, intelligent features have become one of the core competitive advantages of automobiles. The development of numerous intelligent features necessitates that the electrical equipment supporting these functions maintain a certain power supply even after the vehicle is powered off. This is to ensure core functions such as remote video, climate-controlled cabin, and intelligent security are maintained even when the vehicle is not powered on, leading to the persistent presence of dark current. If this dark current exceeds a certain limit, it can easily cause the low-voltage battery to deplete, affecting the normal operation of the vehicle.

[0003] Currently, to address the issue of low-voltage battery depletion, one related technology proposes using a power supply controller (PS) to control the on / off states of accessory relays (ACC), ignition 1 relay (IG1), and ignition 2 relay (IG2), thereby managing the power supply to the vehicle's electrical units and preventing battery depletion due to abnormal use. However, this method's control logic primarily relies on preset fixed strategies and cannot be dynamically adjusted according to the vehicle's real-time status. Therefore, its effectiveness in preventing battery depletion is limited when dealing with complex and changing operating conditions.

[0004] Another related technology proposes to detect the current signal in the circuit where a general electrical appliance is located through a current monitoring unit, and control the relay switch state in conjunction with the gear position signal to prevent power loss caused by excessive dark current. However, the control logic of this method is still relatively simple, mainly relying on the gear position signal and the current signal, and fails to fully consider the necessity of various electrical loads. This poses a risk of accidentally cutting off the power supply to important loads, affecting the normal use of vehicle functions. Summary of the Invention

[0005] This application provides a battery power failure protection method, device, vehicle, and electronic equipment, which can effectively reduce dark current consumption and solve the problem of low-voltage battery power failure while meeting the current necessary functions of the vehicle.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: According to a first aspect provided in this application, a battery power failure protection method is provided, characterized in that the method includes: when the vehicle is in a ventilated state, determining whether the vehicle's operating scenario is a calibrated operating scenario; when the operating scenario is a calibrated operating scenario and the battery's power supply current is greater than the calibrated current, limiting the power supply to the electrical loads in the operating scenario; wherein, the calibrated current is the maximum allowable power supply current set for the calibrated operating scenario to prevent battery power failure.

[0007] Based on the aforementioned technical means, a vehicle is not in a single static state after being turned off; various power consumption scenarios may exist, such as anti-theft system activation scenarios and remote control monitoring scenarios. The power demand and battery consumption logic differ significantly under different scenarios. Therefore, this application determines the current operating scenario of the vehicle when it is turned off, providing a basis for subsequent matching of the rated current and power supply limitation strategies for electrical loads. The rated current is the maximum allowable current set for a specific operating scenario to prevent power outages. When the actual power supply current exceeds the rated current, power supply to electrical loads is limited, avoiding load limitation within the low-current safety range. Furthermore, this application does not disconnect all electrical load circuits but prioritizes limiting unnecessary electrical loads while retaining necessary ones. This targeted limitation effectively reduces dark current (static battery consumption current), preventing battery depletion after prolonged engine shutdown, without affecting the vehicle's basic safety functions and subsequent starting requirements.

[0008] One possible approach is to limit the power supply to electrical loads in the work environment, including limiting the power supply to electrical loads based on the state of charge of the battery when the duration for which the battery supply current is greater than the rated current is longer than a first preset duration.

[0009] Based on the aforementioned technical means, in scenarios where the vehicle is turned off and the power consumption occurs, there may be instances of transient current exceeding the threshold. These transient high currents are not continuous power consumption and will not directly lead to battery depletion. This application filters out transient interference and avoids misjudgments by determining whether the battery's supply current exceeds the rated current for a duration longer than a first preset duration. Furthermore, by combining the battery's SOC and supply current to comprehensively determine whether to limit the power supply to the electrical load, the accuracy and stability of the battery depletion protection strategy can be further improved.

[0010] In one possible approach, power supply to the electrical load is limited based on the state of charge of the battery, including: limiting the power supply to the electrical load based on the load type when the state of charge is greater than a first preset state of charge and less than a second preset state of charge.

[0011] In one possible approach, the defined work scenario is a work scenario that performs a specific task; the load types include a first type of load, a security type of load, and a second type of load; wherein, the first type of load is the load that is essential to performing the specific task; and the second type of load is the load other than the first type of load and the security type of load.

[0012] Based on the above, power supply to electrical loads is restricted according to the load type, including: power supply restriction based on the priority of electrical loads; wherein, the priority of safety loads, first-class loads and second-class loads decreases in that order.

[0013] In one possible approach, the method further includes: when the battery supply voltage is less than a first preset voltage or the battery state of charge is less than or equal to the first preset state of charge, controlling the power battery to replenish the battery; and after a second preset time period, if the battery supply voltage does not reach the second preset voltage, shutting off all electrical loads except for safety loads.

[0014] In one possible approach, the method further includes: stopping the power supply of the battery after shutting off all electrical loads other than safety loads and when the battery's supply voltage is lower than a third preset voltage; wherein the third preset voltage is lower than a first preset voltage.

[0015] In one possible approach, the method further includes limiting the power supply to the electrical load when the battery temperature is higher than a preset temperature.

[0016] In one possible approach, the method further includes: providing a battery overcurrent warning when the duration of the battery supply current being greater than the rated current is greater than a first preset duration and the state of charge is greater than a second preset state of charge.

[0017] One possible approach is to define the following work scenarios: remote monitoring, rainy day window closing, remote parking, remote fragrance, constant temperature cabin, remote air conditioning, and intelligent security.

[0018] According to a second aspect of this application, a battery power failure protection device is provided, comprising: a determining unit and a controlling unit. The determining unit is configured to determine whether the vehicle's operating scenario is a calibrated operating scenario when the vehicle is in a powered-off state. The controlling unit is configured to limit the power supply to electrical loads in the operating scenario when the operating scenario is the calibrated operating scenario and the battery's supply current exceeds the calibrated current; wherein the calibrated current is the maximum permissible supply current set for the calibrated operating scenario to prevent battery power failure.

[0019] In one possible approach, the control unit is specifically used to limit the power supply to the electrical load based on the state of charge of the battery when the duration of the battery supply current being greater than the rated current is longer than a first preset duration.

[0020] In one possible approach, the control unit is further configured to limit the power supply to the electrical load based on the load type when the state of charge is greater than a first preset state of charge and less than a second preset state of charge.

[0021] In one possible approach, the defined work scenario is a work scenario that performs a specific task; the load types include a first type of load, a security type of load, and a second type of load; wherein, the first type of load is the load that is essential to performing the specific task; and the second type of load is the load other than the first type of load and the security type of load.

[0022] Based on the above, the control unit is also specifically used to limit the power supply to the electrical loads based on their priority; wherein the priority of safety loads, first-class loads and second-class loads decreases in that order.

[0023] In one possible implementation, the control unit includes a first control subunit and a second control subunit. The first control subunit is used to control the power battery to replenish the battery when the battery's supply voltage is less than a first preset voltage or the battery's state of charge is less than or equal to the first preset state of charge. The second control subunit is used to shut off all electrical loads except for safety-related loads if the battery's supply voltage fails to reach the second preset voltage after a second preset time period.

[0024] In one possible embodiment, the control unit is further configured to stop supplying power to the battery after shutting off electrical loads other than safety loads and when the battery supply voltage is lower than a third preset voltage; wherein the third preset voltage is lower than a first preset voltage.

[0025] In one possible approach, the control unit is further configured to limit the power supply to the electrical load when the battery temperature exceeds a preset temperature.

[0026] In one possible embodiment, the control unit includes a warning subunit. This warning subunit is configured to issue a battery overcurrent warning when the battery's supply current exceeds the rated current for a duration longer than a first preset duration and the state of charge is greater than a second preset state of charge.

[0027] According to a third aspect provided in this application, a vehicle is provided that is equipped with the battery power failure protection device described in the second aspect above.

[0028] According to a fourth aspect provided in this application, an electronic device is provided, comprising: a processor; and a memory for storing processor-executable instructions. The processor is configured to execute instructions to implement the battery power failure protection method of the first aspect and any possible implementation thereof.

[0029] According to the fifth aspect provided in this application, a computer-readable storage medium is provided that, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enables the electronic device to perform the battery power failure protection described in the first aspect and any possible implementation thereof.

[0030] According to the sixth aspect provided in this application, a computer program product is provided, the computer program product including computer instructions, which, when executed on an electronic device, cause the electronic device to perform the vehicle control method of the first aspect and any possible implementation thereof.

[0031] It should be noted that the technical effects of any of the implementation methods in aspects two through six can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a battery power supply protection system provided in an embodiment of this application; Figure 2 This is a schematic diagram of another battery power supply protection system provided in an embodiment of this application; Figure 3 A schematic flowchart illustrating a battery power supply protection method provided in an embodiment of this application; Figure 4 A schematic flowchart illustrating another battery power supply protection method provided in this application embodiment; Figure 5 This is a schematic diagram of a power supply channel provided in an embodiment of this application; Figure 6 A block diagram of a battery power supply protection device provided in an embodiment of this application; Figure 7 This is a block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0035] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0036] In the embodiments of this application, the words "exemplary," "for example," or "for instance" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a specific manner.

[0037] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] The battery power depletion protection method provided in this application can be applied to vehicles. Vehicles can also be referred to as vehicles, mobile carriers, electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), fuel cell vehicles (FCVs), autonomous vehicles, intelligent and connected vehicles (ICVs), driverless vehicles, etc.

[0039] In this application, the vehicle can be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, fire truck, police car, etc.), a driverless taxi, an intelligent connected bus, an autonomous logistics vehicle, an electric truck, etc. Furthermore, this method is also applicable to various special-purpose vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, and port vehicles. This application does not impose specific limitations in this regard.

[0040] like Figure 1 As shown in the figure, a battery power supply protection system provided in this application includes: a power management module 101, a battery 102, and an electrical load 103 deployed in a vehicle 100. The power management module 101, the battery 102, and the electrical load 103 are communicatively connected.

[0041] In some embodiments, the power management module 101 can determine whether the vehicle 100 is in a powered-off state based on the power level signal of the vehicle 100, and if it is determined that the vehicle 100 is in a powered-off state, determine whether the operating scenario of the vehicle 100 is a calibrated operating scenario. Then, if the operating scenario of the vehicle 100 is a calibrated operating scenario and the supply current of the battery 102 is greater than the calibrated current, the power management module 101 can limit the power supply to the electrical load 103 in the operating scenario. The calibrated current is the maximum allowable supply current set for the calibrated operating scenario to prevent the battery 102 from being depleted.

[0042] In one example, such as Figure 2 As shown, the power management module 101 may include a communication module, a control module, a data acquisition and circuit protection module, and an interface.

[0043] The communication module consists of a controller area network (CAN) transceiver, a controller area network with flexible data rate (CANFD) transceiver, and a local interconnect network (LIN) transceiver.

[0044] The communication module can be used to receive vehicle status and control signals sent by the body controller in the vehicle 100, such as power position signals, door status signals, battery status signals, remote control signals, network management signals, sleep commands, etc., and forward the vehicle status and control signals to the control module.

[0045] The data acquisition and circuit protection module consists of an electronic fuse, a high-side driver (HSD), a metal-oxide-semiconductor field-effect transistor (MOSFET), an operational amplifier, a sampling resistor, and a comparator circuit.

[0046] The data acquisition and circuit protection module can be used to acquire the power supply current, power supply voltage and temperature of the battery 102, and send the power supply current, power supply voltage and temperature of the battery 102 to the control module.

[0047] The control module consists of a microcontroller unit (MCU) and drive circuits, storage circuits, clock circuits, reset circuits, data receiving ports, and data output ports.

[0048] The control module can receive vehicle status and control signals sent by the communication module, and preprocess these signals (e.g., filtering to eliminate high-frequency noise). Then, based on the processed vehicle status and control signals, the operating environment and power status of the vehicle can be determined. The control module can also receive the battery 102's supply current, supply voltage, and temperature from the data acquisition and circuit protection module.

[0049] Based on this, the control module can determine whether the working scenario of the vehicle 100 is the calibrated working scenario when the vehicle 100 is in the off state. If the working scenario is the calibrated working scenario and the power supply current of the battery 102 is greater than the calibrated current, the control module sends a control command to the data acquisition and circuit protection module so that the data acquisition and circuit protection module can limit the power supply to the electrical load 103 in the working scenario.

[0050] The interface consists of a power output interface and a hard-wired wake-up interface. The power output interface can be used to provide power to the entire vehicle; the hard-wired wake-up interface can be used to wake up the power management module 101 in response to a wake-up signal.

[0051] For example, when a user performs an operation (such as pressing the unlock button on the remote key, opening the door, or pressing the start button), the body controller or other controllers send a wake-up signal to the hardline wake-up interface via a dedicated hardline, waking up the power management module 101. Afterward, the power management module 101 can activate its own logic circuits and supply power to other systems in the vehicle that require operation (such as the instrument panel and electronic control units) through the power output interface.

[0052] like Figure 3 As shown in the embodiment of this application, a battery power failure protection method includes: S301. When the vehicle is turned off, determine whether the vehicle's operating scenario is the calibrated operating scenario.

[0053] The calibrated working scenario can be a working scenario for performing a specific task or a working scenario without a specific task. Specifically, a specific task refers to a working scenario in which the vehicle, when the engine is off, locked, and powered off, responds to a remote control command and performs a corresponding operation, such as responding to a remote air conditioning control command to adjust the air conditioning temperature. In this case, the vehicle is in a working scenario with a specific task (i.e., adjusting the air conditioning temperature). A working scenario without a specific task refers to a working state in which the vehicle, when the engine is off, locked, and powered off, does not receive any remote control commands or other control commands from the user, but automatically enters and maintains a low-power standby working state in order to ensure the safety of the vehicle itself, the stability of the vehicle's internal environment, or to meet certain preset conditions.

[0054] Optionally, the calibrated working scenarios may include, but are not limited to: remote monitoring working scenarios, rainy weather window closing working scenarios, remote parking working scenarios, remote fragrance working scenarios, constant temperature cabin working scenarios, remote air conditioning working scenarios, intelligent security working scenarios, key detection working scenarios, and remote video working scenarios.

[0055] In some embodiments, the power management module can receive vehicle status and control signals sent by the body controller. Then, the power management module can determine whether the power supply is in the OFF position (i.e., engine off state) based on the power supply position signal in the vehicle status and control signals. If the power supply is determined to be in the OFF position, the module can determine whether the vehicle's current operating scenario is the calibration operating scenario based on the vehicle status and control signals.

[0056] Optionally, vehicle status and control signals may include, but are not limited to: power position signals, door status signals, battery status signals, remote control signals (such as remote monitoring control signals, remote fragrance control signals, constant temperature cabin control signals, etc.), network management signals, and sleep commands.

[0057] For example, if the vehicle status and control signals include a climate-controlled cabin control signal, and the calibration working scenario includes a climate-controlled cabin working scenario, then it can be determined that the vehicle's current working scenario is a climate-controlled cabin working scenario and that the working scenario is within the calibration working scenario.

[0058] S302. When the working scenario is the calibrated working scenario and the battery supply current is greater than the calibrated current, the power supply to the electrical load in the working scenario is limited.

[0059] The rated current is the maximum allowable supply current set for the calibrated working scenario to prevent battery drain.

[0060] Optionally, the rated current is determined based on actual needs or the characteristics of the battery. For example, the rated current can be 1.1 times, 1.2 times, 1.5 times, etc., of the battery's rated current, without any limitation.

[0061] Power supply restrictions can include at least current limiting and shutdown of electrical loads.

[0062] In some embodiments, the power management module may limit the power supply to the electrical load based on the battery's state of charge (SOC) if the duration for which the battery's supply current is greater than the rated current is greater than a first preset duration.

[0063] Optionally, the preset current acquisition device may include, but is not limited to: Hall sensor, sampling resistor or Efuse.

[0064] Optionally, the first preset duration can be set according to actual needs. For example, the first preset duration can be 10 seconds (s), 15 seconds, etc., or the first preset duration can be obtained by fitting the smoke emission curve of the wire harness, and there is no limitation on this.

[0065] In one example, the power management module can obtain the battery's supply current (or the current of the power supply circuit) through a preset current acquisition device. If the duration for which the supply current exceeds the rated current corresponding to the current operating scenario is greater than a first preset duration, the module calculates the battery's State of Charge (SOC) using the ampere-hour integration method, based on the supply current and the battery's capacity. Then, if the SOC is greater than a first preset SOC but less than a second preset SOC, the power management module can limit the power supply to the electrical load based on the load type.

[0066] Optionally, the first preset SOC, which is less than the second preset SOC, can be set according to actual needs. For example, the first preset SOC can be 15% or 20%, and the second preset SOC can be 30% or 40%, etc., without limitation.

[0067] The load type can include a first type of load, a security type of load, and a second type of load; the first type of load is the load that is essential to achieving a specific task; the second type of load is the load other than the first type of load and the security type of load.

[0068] For example, safety-related loads may include, but are not limited to: batteries, battery management systems, engine management units, anti-lock braking system control units, electric power steering control units, and airbag control units.

[0069] The first category of loads may include, but is not limited to: intelligent driving-related electrical loads (such as adaptive cruise control radar / camera, automatic emergency braking sensor, electric four-wheel drive transfer controller, etc.), entertainment-related electrical loads (such as central infotainment host, instrument panel, car audio amplifier, etc.), seat-related electrical loads (such as seat adjustment motor, seat ventilation fan, seat massage air pump / motor, etc.), and key-related electrical loads (such as keyless entry and start system antenna, body controller, anti-theft alarm, etc.).

[0070] Specifically, the aforementioned power supply limitation based on load type can include: the power management module can limit the power supply to the load based on its priority. The priority of safety-type loads, first-class loads, and second-class loads decreases sequentially; that is, high-priority loads are kept powered normally, while low-priority loads are current-limited or shut down.

[0071] In another example, if the battery's supply current exceeds the rated current for a duration longer than a first preset duration and the State of Charge (SOC) exceeds a second preset SOC, the power management module can issue a battery overcurrent warning. Specifically, the power management module can send a warning signal to the body controller via its built-in communication module. Correspondingly, the body controller can alert the user of an overcurrent fault via the vehicle's screen, or it can send a warning signal to a mobile terminal to notify the user holding the mobile terminal of an overcurrent fault.

[0072] Based on the above technical solution, this application determines the current operating scenario of the vehicle when it is off, providing a basis for subsequent matching of the calibration current and power supply limitation strategies for electrical loads. The calibration current is the maximum permissible current set for a specific operating scenario to prevent power outages. When the actual power supply current exceeds the calibration current, power supply to electrical loads is limited, avoiding load limitation within the low-current safety range. Furthermore, this application does not disconnect all electrical load circuits, but prioritizes limiting unnecessary electrical loads while retaining essential ones. This targeted limitation effectively reduces dark current (static battery current), preventing battery depletion after prolonged engine shutdown, without affecting the vehicle's basic safety functions and subsequent starting requirements.

[0073] In some embodiments, if the battery supply voltage is less than the first preset voltage or the battery SOC is less than or equal to the first preset SOC, it indicates that the battery voltage is too low or the charge is too low. If the power supply continues, it may cause the battery to over-discharge. At this time, the power management module controls the power battery to replenish the battery, and if the battery supply voltage does not reach the second preset voltage after a second preset time, the power loads other than safety loads are turned off.

[0074] After shutting down all electrical loads except for safety-related loads and when the battery supply voltage is lower than a third preset voltage, the power management module can stop the battery supply, i.e., shut down all electrical loads. The third preset voltage is lower than the first preset voltage.

[0075] Optionally, the first preset voltage can be set according to the battery's charge level and voltage waveform. For example, the first preset voltage can be 12 volts (V), 13V, etc., without limitation.

[0076] Optionally, the second preset duration can be set according to actual needs. For example, the second preset duration can be 10s, 15s, or 20s, etc., without limitation.

[0077] In one example, if the battery's supply voltage is less than 12V or its state of charge (SOC) is less than 15%, the power management module can send a power replenishment request to the vehicle controller. This allows the vehicle controller to convert the DC power from the power battery into low-voltage DC power from the battery via a direct current to direct current converter (DCDC). Ten seconds after sending the power replenishment request, if the battery's supply voltage does not reach the second preset voltage of 13.5V and the current vehicle operation is a non-task-specific scenario, the power management module can current-limit or shut down other electrical loads besides safety-related loads.

[0078] In one example, 10 seconds after sending a power replenishment request or after shutting down all electrical loads except for safety loads, if the battery supply voltage is lower than the third preset voltage of 11V and the current vehicle's operating scenario is a scenario for performing a specific task, the power management module can limit the current or shut down all electrical loads.

[0079] In some embodiments, when the battery temperature is higher than a preset temperature, the power management module can limit the power supply to the electrical load.

[0080] In one example, the power management module can acquire the battery temperature (or the power management module surface temperature, MOSFET die temperature) via a thermistor or evacuation device and preprocess the temperature (e.g., filtering and temperature drift compensation). Then, if the battery temperature is detected to be higher than a preset temperature, the power management module can limit the power supply to the electrical load.

[0081] In an optional implementation, the method provided in this application embodiment may further include: for an electrical load that has been turned off (i.e. de-energized), the power management module may restore power to the electrical load at preset intervals. If the cumulative number of power supply cycles is greater than the preset number and the power supply voltage, power supply current and / or temperature still meet the conditions mentioned in the above embodiments, the power management module may send a fault signal to the body controller to prompt the user that there is a fault such as overcurrent, overtemperature, or short circuit.

[0082] In one example, for a power load that has been turned off, the power management module can restore power to the power load every 3 seconds. If overcurrent, overtemperature, short circuit or other faults still exist after 3 attempts to restore power, the power management module can restore power to the power load every 1 minute. If overcurrent, overtemperature, short circuit or other faults still exist, the power management module can restore power to the power load every 3 minutes. If overcurrent, overtemperature, short circuit or other faults still exist, the power management module can send a fault signal to the body controller.

[0083] In one example, when a change in power level is detected (such as from OFF to non-OFF, or from non-OFF to OFF), the power management module can send a reset request to the power-disconnected load.

[0084] It should be noted that the above-mentioned power supply limitation is only applied to the electrical load when the vehicle is in the OFF position. If the vehicle is in the non-OFF position and the power supply voltage, power supply current and / or temperature meet the conditions mentioned in the above embodiments, the power supply to the electrical load is not limited. Instead, a fault signal is sent to the body controller to alert the user to faults such as overcurrent, overtemperature, and short circuit.

[0085] The following will describe in detail the battery power supply protection method provided in this application, in conjunction with the above embodiments. Figure 4 As shown, the method may specifically include: S401. The power management module determines whether the vehicle has been in a turned-off state for a longer than a preset duration. If yes, execute S402; otherwise, end.

[0086] The preset duration can be set according to actual needs. For example, the preset duration can be 30 minutes, 20 minutes, etc., and there is no limitation on it.

[0087] In some embodiments, the power management module can determine whether the duration of the off-state is greater than a preset duration when the vehicle is in an off-state and not operating at high voltage. This can rule out the possibility that some electrical loads are under high voltage immediately after the vehicle is powered off. If it is determined that the duration of the off-state is greater than the preset duration, subsequent steps are executed.

[0088] S402, the power management module determines the vehicle's operating scenario based on the vehicle's status and control signals.

[0089] In some embodiments, if the vehicle's working scenario is determined to be a calibration working scenario, S403 is executed.

[0090] S403. The power management module determines whether the duration for which the battery supply current is greater than the rated current is greater than the first preset duration. If yes, execute S404; otherwise, execute S412.

[0091] S404 The power management module determines the battery's SOC based on the battery's capacity and supply current.

[0092] S405. The power management module determines whether the SOC of the battery is greater than the first preset SOC and less than the second preset SOC. If yes, execute S406; otherwise, execute S407.

[0093] S406, the power management module limits the power supply to electrical loads.

[0094] In some embodiments, the power management module may limit the power supply to the electrical load by referring to the method in S302 above, which will not be elaborated here.

[0095] S407. The power management module determines whether the SOC of the battery is greater than the second preset SOC. If yes, execute S408; otherwise, execute S409.

[0096] S408, the power management module provides a battery overcurrent warning.

[0097] In one example, the power management module can send an overcurrent warning signal to the body controller and send a sleep request to the electrical load whose current exceeds the rated current. After waiting for a preset time (such as 10s, 15s, etc.), if the supply current is still greater than the rated current, the module can limit the current or shut down the electrical load whose current exceeds the rated current.

[0098] S409, the power management module controls the power battery to replenish the storage battery.

[0099] In some embodiments, the power management module may refer to the charging method mentioned in S302 above to control the power battery to charge the storage battery, which will not be elaborated here.

[0100] S410: If the battery supply voltage does not reach the second preset voltage after the second preset time, the power management module shuts down all electrical loads except for safety loads.

[0101] S411. The power management module stops supplying power to the battery after shutting down all electrical loads except for safety loads and when the battery supply voltage is lower than the third preset voltage.

[0102] S412. The power management module determines whether the battery supply voltage is less than the first preset voltage. If yes, execute S409; otherwise, end.

[0103] In one optional implementation, the method provided in this application embodiment may further include: fault diagnosis based on power supply current and temperature.

[0104] In some embodiments, if the battery supply current is greater than the rated current (or a preset multiple of the rated current), and if the duration of the supply current being greater than the rated current (or a preset multiple of the rated current) exceeds a first preset duration, or if the battery temperature is greater than a preset temperature, the power management module can determine whether the vehicle's power supply is in the OFF position (i.e., the engine is off). If the power supply is in the OFF position, the power management module can limit or shut down the electrical load and send an overcurrent / overtemperature fault signal to the body controller via the communication module to alert the user to the presence of an overtemperature or overcurrent fault. If the power supply is not in the OFF position, the power management module only sends an overcurrent / overtemperature fault signal to the body controller via the communication module and does not limit or shut down the electrical load.

[0105] In some embodiments, if a short circuit fault is detected, the Efuse or MOSFET inside the power management module can automatically cut off the circuit to stop power supply and send a short circuit fault signal to the body controller via the communication module.

[0106] In some embodiments, when the battery supply current is detected to be 0, i.e. no current, the power management module can send an open circuit fault signal to the body controller via the communication module.

[0107] In some embodiments, such as Figure 5 As shown, in this embodiment of the application, the electrical load can be powered through a normal power supply channel and a current-limiting power supply channel. One end of the normal power supply channel and the current-limiting power supply channel are connected to the battery, and the other end is connected to the electrical load.

[0108] The normal power supply channel consists of MOSFETs, Efuse (or HSD), etc., while the current-limited power supply channel consists of sampling resistors, operational amplifiers, and MOSFETs.

[0109] In one example, when it is determined that there is no need to limit the power supply to the electrical load and the power supply current is greater than the current threshold, the power management module controls the normal power supply channel and the current-limited power supply channel to be opened to supply power to the electrical load.

[0110] In one example, when it is determined that current limiting of the electrical load is required and the supply current is less than or equal to the current threshold, the power management module controls the current-limited power supply channel to open and the normal power supply channel to close, so as to supply power to the electrical load through the current-limited power supply channel.

[0111] In one example, when it is determined that the electrical load needs to be shut down, the power management module controls the current-limited power supply channel and the normal power supply channel to close, thereby stopping the power supply to the electrical load.

[0112] For example, in response to a super power saving request, the power management module can shut down the normal power supply channel and the current-limited power supply channel, and the power management module can enter a sleep state. Alternatively, in response to exiting the super power saving mode, the power management module can wake up and then turn on the normal power supply channel and the current-limited power supply channel.

[0113] In one example, after shutting down (i.e., cutting off power) or limiting the current of the electrical load, if a change in the vehicle's door handle status is detected (e.g., a user pulling the door handle to enter the vehicle), the power management module can be woken up via a hardwired signal from the door handle. Accordingly, upon receiving the hardwired signal from the door handle, the power management module can either open the power supply channels (i.e., the normal power supply channel and the current-limited power supply channel) or stop limiting the current of the electrical load. If, after waiting for a preset time (e.g., 10 seconds), the vehicle's power is in the OFF position, there is a possibility of accidental door handle activation, requiring the electrical load to be shut down or current-limited again.

[0114] like Figure 6 As shown, the battery power supply protection device provided in this application includes: a determination unit 601 and a control unit 602.

[0115] The determination unit 601 is used to determine whether the vehicle's working scenario is the calibration working scenario when the vehicle is in a turned-off state.

[0116] The control unit 602 is used to limit the power supply to the electrical load in the working scenario when the working scenario is the calibrated working scenario and the power supply current of the battery is greater than the calibrated current; wherein, the calibrated current is the maximum allowable power supply current set for the calibrated working scenario to prevent the battery from being depleted.

[0117] In one possible approach, the control unit 602 is specifically configured to limit the power supply to the electrical load based on the state of charge of the battery when the duration for which the power supply current of the battery is greater than the rated current is greater than a first preset duration.

[0118] In one possible approach, the control unit 602 is further configured to limit the power supply to the electrical load based on the load type when the state of charge is greater than a first preset state of charge and less than a second preset state of charge.

[0119] In one possible approach, the defined work scenario is a work scenario that performs a specific task; the load types include a first type of load, a security type of load, and a second type of load; wherein, the first type of load is the load that is essential to performing the specific task; and the second type of load is the load other than the first type of load and the security type of load.

[0120] Based on the above, the control unit 602 is further configured to limit the power supply to the electrical load based on the priority of the electrical load; wherein the priority of safety loads, first-class loads and second-class loads decreases in that order.

[0121] In one possible embodiment, the control unit 602 includes a first control subunit and a second control subunit. The first control subunit is used to control the power battery to replenish the battery when the battery's supply voltage is less than a first preset voltage or the battery's state of charge is less than or equal to the first preset state of charge. The second control subunit is used to shut off all electrical loads except for safety-related loads if the battery's supply voltage fails to reach the second preset voltage after a second preset time period.

[0122] In one possible embodiment, the control unit 602 is further configured to stop supplying power to the battery after shutting off electrical loads other than safety loads and when the battery supply voltage is less than a third preset voltage; wherein the third preset voltage is less than the first preset voltage.

[0123] In one possible embodiment, the control unit 602 is further configured to limit the power supply to the electrical load when the battery temperature is higher than a preset temperature.

[0124] In one possible embodiment, the control unit 602 includes a warning subunit. The warning subunit is configured to issue a battery overcurrent warning when the battery supply current exceeds the rated current for a duration longer than a first preset duration and the state of charge exceeds a second preset state of charge.

[0125] like Figure 7 As shown, the block diagram of an electronic device provided in this application includes, but is not limited to, a processor 701 and a memory 702.

[0126] The memory 702 described above is used to store the executable instructions of the processor 701. It is understood that the processor 701 is configured to execute instructions to implement the battery charging method in the above embodiments.

[0127] It should be noted that those skilled in the art will understand that Figure 7 The electronic device structure shown does not constitute a limitation on the electronic device; the electronic device may include, but is not limited to, other electronic devices. Figure 7 This may indicate more or fewer components, or combinations of certain components, or different component arrangements.

[0128] Processor 701 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 702, and by calling data stored in memory 702, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Processor 701 may include one or more processing units. Optionally, processor 701 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 701.

[0129] The memory 702 can be used to store software programs and various data. The memory 702 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required by at least one functional module (such as a determination unit, processing unit, etc.), etc. Furthermore, the memory 702 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0130] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 702 including instructions, which can be executed by a processor 701 of an electronic device to implement the methods in the above embodiments.

[0131] In actual implementation, Figure 6 The functions of both the determining unit 601 and the control unit 602 can be determined by... Figure 7 The processor 701 calls the computer program stored in the memory 702 to implement the process. The specific execution process can be found in the description of the method section in the previous embodiment, and will not be repeated here.

[0132] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0133] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by a processor 701 of an electronic device to perform the methods described above.

[0134] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of an electronic device, they implement the various processes of the above method embodiments and achieve the same technical effect as the above method. To avoid repetition, they will not be described again here.

[0135] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to 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.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0137] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0139] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0140] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery power supply protection method, characterized in that, The method includes: With the vehicle in a powered-off state, determine whether the vehicle's operating scenario is the calibrated operating scenario; When the working scenario is the calibrated working scenario and the battery supply current is greater than the calibrated current, the power supply to the electrical load in the working scenario is limited. The calibration current is the maximum allowable supply current set for the calibration working scenario to prevent the battery from being depleted.

2. The battery power supply protection method according to claim 1, characterized in that, The power supply limitation on the electrical loads in the work scenario includes: If the duration for which the battery supply current is greater than the rated current is greater than a first preset duration, the power supply to the electrical load is limited based on the battery's state of charge.

3. The battery power supply protection method according to claim 2, characterized in that, The method of limiting the power supply to the electrical load based on the state of charge of the battery includes: When the state of charge is greater than a first preset state of charge and less than a second preset state of charge, the power supply to the electrical load is limited based on the load type of the electrical load.

4. The battery power supply protection method according to claim 3, characterized in that, The calibrated work scenario is a work scenario for performing a specific task; the load types include a first type of load, a security type of load, and a second type of load; wherein, the first type of load is an essential load for performing the specific task; the second type of load is a load other than the first type of load and the security type of load; The method of limiting the power supply to the electrical load based on the load type includes: Power supply to the electrical loads is limited based on their priority; wherein the priority of the safety-type loads, the first type of loads, and the second type of loads decreases in that order.

5. The battery power supply protection method according to claim 1, characterized in that, The method further includes: When the supply voltage of the battery is less than the first preset voltage or the state of charge of the battery is less than or equal to the first preset state of charge, the power battery is controlled to replenish the battery. If the battery supply voltage fails to reach the second preset voltage after a second preset time period, the electrical loads other than safety loads will be shut off.

6. The battery power supply protection method according to claim 5, characterized in that, The method further includes: After shutting off all electrical loads except for safety-related loads and when the battery supply voltage is less than a third preset voltage, the power supply of the battery is stopped. The third preset voltage is less than the first preset voltage.

7. The battery power supply protection method according to claim 1, characterized in that, The method further includes: If the temperature of the battery exceeds a preset temperature, the power supply to the electrical load will be limited.

8. The battery power supply protection method according to claim 2, characterized in that, The method further includes: If the duration for which the battery's supply current is greater than the rated current is greater than a first preset duration and the state of charge is greater than a second preset state of charge, a battery overcurrent warning will be issued.

9. The battery power supply protection method according to claim 1, characterized in that, The calibrated working scenarios include: remote monitoring, rainy weather window closing, remote parking, remote fragrance, constant temperature cabin, remote air conditioning, and intelligent security.

10. A battery power supply protection device, characterized in that, The device includes: The determining unit is used to determine whether the vehicle's operating scenario is the calibration operating scenario when the vehicle is in a powered-off state. The control unit is used to limit the power supply to the electrical load in the working scenario when the working scenario is the calibrated working scenario and the power supply current of the battery is greater than the calibrated current. The calibration current is the maximum allowable supply current set for the calibration working scenario to prevent the battery from being depleted.

11. A vehicle, characterized in that, The vehicle is equipped with the battery power supply protection device as described in claim 10.

12. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the battery power supply protection method as described in any one of claims 1-9.

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