Power consumption abnormity detection method, controller, equipment, storage medium and vehicle

Abstract

The invention discloses an abnormal power consumption detection method, a controller, equipment, a storage medium and a vehicle, and relates to the technical field of battery packs, and the method comprises the steps: obtaining a first voltage of a first battery cell group under the condition that the first battery cell group supplies power to an analog front-end module, and obtaining a second voltage of the first battery cell group under the condition that the first voltage is smaller than a preset voltage threshold value; the method comprises the following steps: executing power supply operation, obtaining the current number of times of executing the power supply operation, and determining that the analog front-end module is abnormal in power consumption when the current number of times is greater than a preset number of times threshold value, so that a worker can know and process the abnormal power consumption in time, and energy consumption increase of the battery pack is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of battery packs, and specifically relates to a method for detecting abnormal power consumption, a controller, a device, a storage medium, and a vehicle. Background Art

[0002] In a battery management system (BMS), an analog front end (AFE) module is used to accurately collect and process parameters such as the voltage, current, and temperature of the battery cells in the battery pack.

[0003] Due to reasons such as damage to the power supply line channel of the analog front end module, the power consumption of the analog front end module increases, resulting in an increase in the energy consumption of the battery pack when the staff cannot handle it in time. Summary of the Invention

[0004] This application aims to provide a method for detecting abnormal power consumption, a controller, a device, a storage medium, and a vehicle, and at least solve the problem that in the related art, due to the increased power consumption of the analog front end module, the energy consumption of the battery pack increases when the staff cannot handle it in time.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of this application provides a method for detecting abnormal power consumption, and the method includes:

[0007] When powering the analog front end module through a first battery cell group, obtain a first voltage of the first battery cell group;

[0008] When the first voltage is less than a preset voltage threshold, perform a charging operation;

[0009] Obtain the current number of times of performing the charging operation, and when the current number of times is greater than a preset number threshold, determine that the analog front end module has abnormal power consumption.

[0010] Optionally, the step of performing a charging operation when the first voltage is less than a preset voltage threshold includes: when the first voltage is less than the preset voltage threshold and the historical number of times of the previously performed charging operation is less than or equal to the preset number threshold, turn on a switching device that controls the second battery cell group to supply power externally, so that the second battery cell group charges the first battery cell group.

[0011] Optionally, a second voltage of the second battery cell group is greater than the first voltage.

[0012] Optionally, during the charging operation, the duration for which the second battery cell group charges the first battery cell group is a preset duration.

[0013] Optionally, when the battery management system is in a sleep state, the first battery cell group is used to supply power to the analog front-end module; the step of obtaining the current number of times of performing the charging operation includes: obtaining the historical number of times of performing the charging operation in the current sleep state of the battery management system; adding 1 to the historical number of times to obtain the current number of times.

[0014] Optionally, the method further includes: when the battery management system switches from the sleep state to the working state, setting the current number of times to 0.

[0015] In a second aspect, an embodiment of the present application further provides a controller, which is used to implement the steps of the method for detecting abnormal power consumption as described in the first aspect.

[0016] In a third aspect, an embodiment of the present application further provides an electronic device, including a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method for detecting abnormal power consumption as described in the first aspect are implemented.

[0017] In a fourth aspect, an embodiment of the present application further provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method for detecting abnormal power consumption as described in the first aspect are implemented.

[0018] In a fifth aspect, an embodiment of the present application further provides a vehicle, including the controller as described in the second aspect, or including the electronic device as described in the third aspect, or including the readable storage medium as described in the fourth aspect.

[0019] In the embodiment of the present application, first, when the first battery cell group is used to supply power to the analog front-end module, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than a preset voltage threshold, a charging operation is performed. Next, the current number of times of performing the charging operation is obtained, and when the current number of times is greater than a preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can be informed and processed in time to avoid an increase in the energy consumption of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a flowchart of the steps of a method for detecting abnormal power consumption provided by an embodiment of the present application;

[0021] Figure 2 is a specific flowchart of the steps of a method for detecting abnormal power consumption provided by an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the battery management system provided by an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of the detection process for abnormal power consumption provided by an embodiment of the present application;

[0024] Figure 5 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0026] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data may be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object may be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0027] Next, in conjunction with the accompanying drawings, the detection method for abnormal power consumption provided by the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.

[0028] Figure 1 is a flowchart of the steps of a detection method for abnormal power consumption provided by an embodiment of the present application. As Figure 1 shown, the method may include:

[0029] Step 101: Obtain a first voltage of the first battery cell group when the analog front-end module is powered by the first battery cell group.

[0030] It should be noted that the battery pack includes a first battery cell group and a second battery cell group. Among them, the first battery cell group includes multiple battery cells, and the second battery cell group includes multiple battery cells (i.e., single battery cells); the battery management system includes a main control module and multiple slave control modules. Each slave control module includes multiple analog front-end modules, and the analog front-end module is used to detect the state of at least one battery cell.

[0031] In some embodiments, the battery cell is a lithium battery.

[0032] In some embodiments, the first voltage of the first battery cell group is the total voltage of multiple battery cells in the first battery cell group.

[0033] In some embodiments, the types of the analog front-end module include an analog front-end chip, an analog front-end circuit, etc.

[0034] In some embodiments, the analog front-end module has the following functions: (1) Signal acquisition: The analog front-end module can receive and process analog signals generated by various sensors, such as temperature, pressure, light intensity, etc. Through the built-in analog front-end circuit, the analog front-end module can convert these analog signals into digital signals for subsequent digital signal processing; (2) Signal processing: The analog front-end module has certain signal processing functions and can perform operations such as filtering, amplification, and gain adjustment on the acquired signals, which can improve the signal quality, reduce the influence of noise and interference on the signals, and thus obtain more accurate data; (3) Data conversion: The analog front-end module can convert analog signals into digital signals and output them to subsequent processors or controllers through a digital interface. This can conveniently transmit the sensor data to other devices or systems for processing and analysis; (4) Power management: The analog front-end module usually also integrates some power management functions and can monitor and stabilize the supply voltage to ensure normal operation; (5) Equalization management: The analog front-end module is also responsible for the equalization management of the battery cells in the battery management system to ensure the voltage consistency of each single battery in the battery cell group, which is usually achieved through passive equalization or active equalization.

[0035] In some embodiments, the battery management system has the following functions: (1) Data acquisition and detection: Real-time acquisition of key parameters such as the voltage, current, and temperature of the battery pack, and detection of the state of the battery cells or cell groups, such as the state of charge (SOC) and state of health (SOH). Among them, the state of charge is the percentage of the current remaining charge of the battery cell to the full charge, representing the remaining capacity of the battery cell, and the state of health is the percentage of the current full charge of the battery cell to the full charge of a new battery cell, representing the health degree of the battery cell; (2) State estimation: Estimation of the remaining charge (SOC), state of health, and available power (SOP) of the battery cell to ensure the power performance and lifespan. Among them, the available power represents the maximum power that the battery cell can safely input or output within a certain time interval; (3) Balancing management: Balancing the voltage and capacity differences of each battery cell or cell group in the battery pack through active or passive balancing techniques to extend the battery lifespan; (4) Thermal management: Monitoring the temperature distribution of the cell group and maintaining an appropriate operating temperature through a cooling or heating system; (5) Safety protection: Detecting and preventing abnormal conditions such as overcharging, over-discharging, overcurrent, and short circuits to ensure the safe operation of the cell group; (6) Communication and interaction: Conducting data communication with external devices (such as chargers, inverters, cloud platforms), providing a user-friendly interface, and displaying the battery status and operation suggestions.

[0036] In some embodiments, with reference to Figure 3 , the battery management system includes a main control module 20, a slave control module 31, and a slave control module 32. The slave control module 31 includes an analog front-end module A1, an analog front-end module A2, and an analog front-end module A3. The slave control module 32 includes an analog front-end module A4, an analog front-end module A5, and an analog front-end module A6; the battery pack 10 includes a first cell group 11 and a second cell group 12. Among them, the first cell group 11 includes the serially connected battery cells B1, B2, B3, and B4, and the second cell group 12 includes the serially connected battery cells B5, B6, B7, B8, B9, ……, Bn;

[0037] The master control module 20 is respectively connected to the slave control module 31 and the slave control module 32, and the slave control module 31 and the slave control module 32 are respectively connected to the second battery cell group 12; the negative electrode of the second battery cell group 12 is connected to the first end of the first switching device K1, the second end of the first switching device K1 is connected to the negative electrode of the high-voltage power distribution box 40, the positive electrode of the second battery cell group 12 is connected to the first end of the second switching device K2, the second end of the second switching device K2 is connected to the positive electrode of the high-voltage power distribution box 40, the first output end of the high-voltage power distribution box 40 is connected to the first input end of the voltage conversion module 50, the second output end of the high-voltage power distribution box 40 is connected to the second input end of the voltage conversion module 50, the first output end of the voltage conversion module 50 is respectively connected to the positive electrode of the first battery cell group 11, the positive electrode of the slave control module 31 and the positive electrode of the slave control module 32, and the second output end of the voltage conversion module 50 is respectively connected to the negative electrode of the first battery cell group 11, the negative electrode of the slave control module 31 and the negative electrode of the slave control module 32, wherein the voltage conversion module 50 can be a DC-DC converter (Direct Current-Direct Current Converter); the positive electrode of the first battery cell group 11 is respectively connected to the positive electrode of the slave control module 31 and the positive electrode of the slave control module 32, and the negative electrode of the first battery cell group 11 is respectively connected to the negative electrode of the slave control module 31 and the negative electrode of the slave control module 32;

[0038] The master control module 20 is used to control the analog front-end modules in the slave control module 31 and the slave control module 32 to realize the detection of the states of the battery cells in the second battery cell group 12. For example, the parameters such as the voltage, current, and temperature of the battery cells in the second battery cell group 12 are accurately collected and processed. Each analog front-end module has a corresponding battery cell, and the analog front-end module detects the state of the battery cell corresponding to the analog front-end module. For example, the analog front-end module A1 corresponds to the battery cells B5 and B6, and the analog front-end module A1 detects the states of the battery cells B5 and B6; the master control module 20 obtains the state information of the battery cells collected by the slave control module 31 and the state information of the battery cells collected by the slave control module 32, and performs analysis and management; both the slave control module 31 and the slave control module 32 support the battery equalization function.

[0039] When both the first switching device K1 and the second switching device K2 are turned on, the second battery cell group 12 supplies power externally. When both the first switching device K1 and the second switching device K2 are turned off, the second battery cell group 12 stops supplying power externally; the high-voltage power distribution box 40 is used to distribute the power supply lines of the second battery cell group 12, that is, the high-voltage power distribution box performs the distribution and management of high-voltage electrical energy. The high-voltage power distribution box also provides functions such as power-on control for high-voltage components and over-current and short-circuit protection for the high-voltage circuit. For example, if the high-voltage power distribution box 40 distributes a power supply line connecting the second battery cell group 12 to the voltage conversion module 50, then the voltage conversion module 50 is used to convert the power supply signal of the second battery cell group 12 after voltage conversion and supply power to the first battery cell group 11, the slave control module 31, and the slave control module 32 when the second battery cell group 12 supplies power externally; the first battery cell group 11 is used to supply power to the slave control module 31 and the slave control module 32; supplying power to the slave control module 31 and the slave control module 32 means supplying power to each analog front-end module in the slave control module 31 and each analog front-end module in the slave control module 32.

[0040] It should be noted that the body control module (BCM) is connected to the battery management system, and the body control module is used to control the operation of the battery management system.

[0041] In the embodiment of the present application, when the first battery cell group in the battery pack supplies power to the analog front-end module in the battery management system, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than the preset voltage threshold, a power replenishment operation is performed.

[0042] Step 102: When the first voltage is less than the preset voltage threshold, perform a power replenishment operation.

[0043] Wherein, the power replenishment operation includes charging the first battery cell group through the second battery cell group in the battery pack.

[0044] In the embodiment of the present application, the preset voltage threshold can be set in advance by the staff. When the first voltage is less than the preset voltage threshold, it indicates that the power of the first battery cell group is too low and under-voltage. By performing a power replenishment operation when the first voltage is less than the preset voltage threshold, that is, charging the first battery cell group through the second battery cell group in the battery pack, the power of the first battery cell group is restored to normal, and the voltage of the first battery cell group with normal power is greater than or equal to the preset voltage threshold.

[0045] Step 103: Obtain the current number of times the power replenishment operation is performed, and when the current number of times is greater than the preset number threshold, determine that the analog front-end module has abnormal power consumption.

[0046] It should be noted that the preset number threshold can be set in advance by the staff. For example, the preset number threshold is set to 2 times.

[0047] In some embodiments, after determining that the power consumption of the analog front-end module is abnormal, an alarm message for the abnormal power consumption of the analog front-end module is generated for the staff to know.

[0048] In the embodiments of the present application, by executing the current number of supplementary power operations, and when the current number is greater than the preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can know and process it in time, and the power consumption of the analog front-end module returns to normal.

[0049] To sum up, in the embodiments of the present application, first, when the analog front-end module is powered by the first battery cell group, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than the preset voltage threshold, a supplementary power operation is executed. Then, the current number of times of executing the supplementary power operation is obtained, and when the current number is greater than the preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can know and process it in time, and the increase in the energy consumption of the battery pack is avoided.

[0050] Figure 2 is a specific step flow chart of the detection method for abnormal power consumption provided by the embodiments of the present application. As Figure 2 shown, the method may include:

[0051] Step 201: When the analog front-end module is powered by the first battery cell group, obtain the first voltage of the first battery cell group.

[0052] The implementation manner of this step is similar to the implementation process in step 101 above, and will not be elaborated here.

[0053] Step 202: When the first voltage is less than the preset voltage threshold and the historical number of times of the previously executed supplementary power operation is less than or equal to the preset number threshold, by turning on the switching device that controls the second battery cell group to supply power externally, the second battery cell group charges the first battery cell group.

[0054] In the embodiments of the present application, when the first voltage is less than the preset voltage threshold, it indicates that the power of the first battery cell group is too small and under-voltage. When the historical number of times of the previously executed supplementary power operation is less than or equal to the preset number threshold, it indicates that the power consumption of the analog front-end module is normal. At this time, by executing the supplementary power operation, that is, by turning on the switching device that controls the second battery cell group to supply power externally, the second battery cell group in the battery pack charges the first battery cell group, so that the power of the first battery cell group returns to normal.

[0055] Optionally, in some embodiments, the second voltage of the second battery cell group is greater than the first voltage.

[0056] In some embodiments, the second voltage of the second battery cell group is the total voltage of multiple battery cells in the second battery cell group.

[0057] In some embodiments, the first battery cell group is the power source for the low-voltage domain of the vehicle, and the second battery cell group is the power source for the high-voltage domain of the vehicle.

[0058] In the embodiments of the present application, the battery pack is divided into a first battery cell group for supplying power to the devices in the low-voltage domain and a second battery cell group for supplying power to the devices in the high-voltage domain, so as to achieve high-voltage power supply and low-voltage power supply.

[0059] Optionally, in some embodiments, during the charging operation, the duration for which the second battery cell group charges the first battery cell group is a preset duration.

[0060] In the embodiments of the present application, during the charging operation, the duration for which the second battery cell group in the battery pack charges the first battery cell group is a preset duration, that is, during the charging operation, the duration for which the second battery cell group in the battery pack charges the first battery cell group is a fixed duration set in advance, that is, the charging duration of each charging operation is a fixed duration set in advance. Through preset settings by the staff, the charging duration can be adjusted to adapt to different power consumption working conditions.

[0061] Step 203: Obtain the current number of times of performing the charging operation, and determine that the analog front-end module has abnormal power consumption when the current number of times is greater than a preset number threshold.

[0062] The implementation manner of this step is similar to the implementation process in the above step 103, and will not be elaborated here.

[0063] Optionally, in some embodiments, the method further includes the following steps:

[0064] Step 204: When the battery management system is in the sleep state, supply power to the analog front-end module through the first battery cell group.

[0065] It should be noted that when the battery management system is in the sleep state, the analog front-end module still needs to work to monitor the states of the battery cells in the battery pack.

[0066] In some embodiments, refer to Figure 3, when the vehicle is in the sleep state, control the first switching device K1 and the first switching device K2 to be disconnected, supply power to the analog front-end module through the first battery cell group, and obtain the first voltage of the first battery cell group; when the first voltage is less than the preset voltage threshold, perform a charging operation, that is, control the first switching device K1 and the first switching device K2 to be turned on, and charge the first battery cell group through the second battery cell group; in addition, supply power to the analog front-end module through the second battery cell group; the sleep state of the vehicle refers to when the vehicle is not in use (such as parked), the devices in the vehicle enter the low-power state as a whole.

[0067] In the embodiment of the present application, when the vehicle is in the sleep state or the low-voltage state, the battery management system is in the sleep state. At this time, the devices in the high-voltage domain of the vehicle stop working, the second battery cell group stops supplying power externally, and the first battery cell group is used to supply power to the analog front-end module to keep the analog front-end module working normally.

[0068] It should be noted that the sleep state of the vehicle is an energy-saving strategy, mainly used to reduce the power consumption of the vehicle when it is stationary, avoid the vehicle discharging due to static high power consumption, and extend the battery life; in the sleep state of the vehicle, basic monitoring functions are retained, such as key signal detection, anti-theft system, etc.; common scenarios of the sleep state of the vehicle include (1) long-term parking, that is, when the vehicle is stationary, the sleep state can avoid excessive battery discharge; (2) charging management, that is, during the charging process, the vehicle may enter the sleep state to save power; (3) remote control, that is, wake up the vehicle through the network to perform remote operations, such as unlocking the door or starting the air conditioner; the sleep state of the vehicle can be awakened by hard-wire wake-up, network wake-up, real-time clock (RTC) wake-up. Among them, hard-wire wake-up is to wake up the controller through voltage or current changes, such as the ignition signal; network wake-up is to send a wake-up message through the controller area network (CAN) bus or other networks; RTC wake-up is to wake up the controller at a predetermined time point through the real-time clock; the wake-up methods of the sleep state of the vehicle include key signal wake-up, physical operation wake-up and network signal wake-up. Among them, key signal wake-up is to unlock or start the vehicle through the remote control key, physical operation wake-up such as pressing the back door switch or stepping on the brake pedal, and network signal wake-up such as waking up the vehicle remotely through the fourth-generation mobile communication technology (4G) network, fifth-generation mobile communication technology (5G) network or Bluetooth.

[0069] The low-voltage state of the vehicle means that the low-voltage system of the vehicle (usually 12V or 48V) is in a working state, but the high-voltage system (such as the power battery) is not powered on. Among them, the low-voltage power supply system is the first battery cell group and the control component of the first battery cell group. In some embodiments, the control component of the first battery cell group includes a high-low voltage conversion system, a DC voltage converter, an ignition switch, a BCM, a lighting system, an air-conditioning control system, etc.; the high-voltage system is the second battery cell group and the control component of the second battery cell group;

[0070] When the vehicle starts, the low-voltage power is supplied by the low-voltage battery (i.e., the first battery cell group). After the power battery pack (i.e., the second battery cell group) is powered on, the DC voltage converter converts the high-voltage DC power into low-voltage DC power to supply power to the low-voltage electrical equipment of the vehicle; the BCM can realize functions such as control of internal and external lights, washing and wiping, and power management; the lighting system includes lighting lamps and signal lamps, and part of the lighting power is directly supplied by the low-voltage battery; the air-conditioning control system can adjust the temperature, humidity, etc. inside the vehicle.

[0071] The functions of the low-voltage system include: (1) Load management: According to the importance and power level of the low-voltage system, non-essential loads such as the entertainment system and air conditioner are preferentially turned off to ensure the power supply of important systems; (2) Battery management: Real-time monitoring of the power of the low-voltage battery, and adjustment of the power supply strategy according to the power level to avoid over-discharge or over-charge of the battery, thereby extending the battery life; (3) Communication and coordination: The electronic control units (ECUs, Electronic Control Unit) inside the vehicle communicate through a bus (such as CAN) to jointly manage the power supply requirements of each system; (4) Wake-up signal: When an ECU needs to wake up from the sleep mode, it will send a wake-up signal to other ECUs to ensure synchronous power supply of the whole vehicle system.

[0072] Step 205, when the battery management system is in a working state, power the analog front-end module through the second battery cell group.

[0073] In some embodiments, refer to Figure 3 , when the vehicle is in a starting state, control the first switching device K1 and the first switching device K2 to conduct, so as to realize powering the analog front-end module through the second battery cell group; the starting state of the vehicle refers to the vehicle entering a high-power consumption state, such as driving.

[0074] In the embodiments of the present application, when the vehicle is in a starting state, the battery management system is in a working state. At this time, the equipment in the high-voltage domain of the vehicle works, and the second battery cell group powers the equipment in the high-voltage domain, and powers the analog front-end module through the second battery cell group to ensure the normal operation of the analog front-end module.

[0075] It should be noted that the startup state of the vehicle refers to the state of high voltage on the vehicle. When there is high voltage on the vehicle, it means that the high-voltage system of the vehicle is working. The high-voltage system refers to the electrical system in the vehicle that operates with high-voltage direct current (usually greater than 60V). It is mainly used to supply power to high-voltage components such as drive motors and air-conditioning compressors, and to detect the state of the entire high-voltage system at any time. The high-voltage system includes a power battery (i.e., the second battery cell group), a drive motor, a high-voltage distribution box, an on-board charger (OBC, On-Board Charger), a DC-DC converter, a positive temperature coefficient (PTC, Positive Temperature Coefficient Heater) heater, and high-voltage wiring harnesses, etc. Among them, the power battery provides high-voltage direct current and is the power source of the electric vehicle, with a voltage usually between 100 - 400V; the drive motor converts electrical energy into mechanical energy to drive the vehicle; the high-voltage distribution box distributes the electrical energy of the power battery to each high-voltage component and protects the circuit; the on-board charger converts alternating current into direct current to charge the power battery; the DC-DC converter converts high-voltage direct current into low-voltage direct current to supply power to the low-voltage system; the PTC heater is used for heating inside the vehicle; the high-voltage wiring harness: connects each high-voltage component to ensure reliable transmission of electrical energy.

[0076] The functions of the high-voltage system include: (1) Energy transmission and distribution: ensuring reliable and safe transmission of the electrical energy of the power battery to high-voltage electrical appliances; (2) Charging management: realizing charging control of the power battery through the on-board charger and the high-voltage distribution box; (3) Safety protection: ensuring the safe operation of the high-voltage system through means such as high-voltage interlock and insulation monitoring; (4) Energy recovery: converting mechanical energy into electrical energy during braking or coasting and recovering it into the power battery.

[0077] It can be achieved by executing step 204 to step 205 to ensure the power supply of the analog front-end module and make the analog front-end module work properly when the battery management system is in the sleep state or the working state.

[0078] Optionally, in some embodiments, the method further includes the following steps:

[0079] Step 206: When the first voltage is less than the preset voltage threshold, supply power to the analog front-end module through the second battery cell group.

[0080] It should be noted that when the charging operation is completed, stop supplying power to the analog front-end module through the second battery cell group and supply power to the analog front-end module through the first battery cell group.

[0081] In the embodiment of the present application, since the first voltage is less than the preset voltage threshold, it indicates that the power of the first battery cell group is too small and under-voltage. At this time, the power supply capacity of the first battery cell group cannot meet the requirements of the analog front-end module. The analog front-end module is powered by the second battery cell group with sufficient power to ensure the normal operation of the analog front-end module.

[0082] Optionally, in some embodiments, the obtaining the current number of times of performing the charging operation includes:

[0083] Sub-step 2031: Obtain the historical number of times of the charging operation performed historically in the current sleep state of the battery management system.

[0084] In the embodiment of the present application, by obtaining the historical number of times of the charging operation performed historically in the current sleep state of the battery management system, and then adding 1 to the historical number of times, the current number of times of performing the charging operation is obtained.

[0085] Sub-step 2032: Add 1 to the historical number of times to obtain the current number of times.

[0086] In the embodiment of the present application, by adding 1 to the historical number of times to obtain the current number of times of performing the charging operation, and then comparing the current number of times of performing the charging operation with the preset number threshold.

[0087] By performing Sub-step 2031 to Sub-step 2032, the current number of times of performing the charging operation can be obtained.

[0088] Optionally, in some embodiments, the method further includes the following steps:

[0089] Step 207: When the battery management system switches from the sleep state to the working state, set the current number of times to 0.

[0090] It should be noted that the recording period of the charging operation is from the start time of the sleep state of the battery management system to the end time of the sleep state of the battery management system.

[0091] In the embodiment of the present application, when the battery management system switches from the sleep state to the working state, at this time, the power supply for the analog front-end module is switched from the first battery cell group to the second battery cell group, and the current number of times of performing the charging operation is set to 0, so as to re-record the number of times of performing the charging operation when the battery management system enters the sleep state next time.

[0092] In some embodiments, the battery management system obtains the states of the cells in the first cell group and the states of the cells in the second cell group, and sends the states of the cells in the first cell group and the states of the cells in the second cell group to the vehicle control unit (VCU) for the vehicle control unit to control the operation of the vehicle according to the states of the cells in the first cell group and the states of the cells in the second cell group.

[0093] An embodiment of the present application further provides a controller, which is used to implement the steps of the power consumption anomaly detection method as described above. The specific implementation process is similar to the above and will not be elaborated here.

[0094] In some embodiments, the controller is a body control module.

[0095] It should be noted that the body control module includes a microprocessor, an input interface, an output interface, a memory, etc. Among them, the microprocessor is responsible for receiving and processing signals from various sensors and switches, and controlling the body electrical equipment according to a preset program. Usually, a high-performance single-chip microcomputer or microcontroller is used, which has a high operation speed and processing ability; the input interface is used to receive signals from various sensors and switches, including door switches, window switches, headlight switches, wiper switches, key switches, etc. The input interface usually uses digital signal input or analog signal input to convert the signals of sensors and switches into digital signals that can be recognized by the microprocessor; the output interface is used to control the operation of the body electrical equipment, including headlights, windows, door locks, wipers, rearview mirrors, etc. The output interface usually uses digital signal output or analog signal output to convert the control signals of the microprocessor into signals that can be recognized by the body electrical equipment; the memory is used to store the programs and data of the BCM, including control algorithms, fault codes, vehicle parameters, etc. Usually, non-volatile memories such as flash memory or electrically erasable programmable read-only memory are used to ensure the security and reliability of data; the communication interface is used to communicate with other vehicle electronic control modules, such as the engine control module (ECM), the transmission control module (TCM), the airbag control module (ACU), etc. The communication interface usually uses CAN bus, local interconnect network (LIN) bus or other communication protocols to achieve the integration and collaborative work of the vehicle electronic control system;

[0096] The functions of the body control module also include headlight control, window control, door lock control, wiper control, rearview mirror control, etc.; among them, headlight control means controlling various vehicle headlights, including high beams, fog lights, turn signals, brake lights, position lights, etc. It can automatically control the lighting and extinguishing of headlights according to factors such as the vehicle's driving state and ambient light, improving the safety and convenience of the vehicle; window control means controlling the raising and lowering of vehicle windows, including the driver's side window, front passenger side window, rear windows, etc. It can control the raising and lowering of windows through window switches, remote controls, etc., improving the comfort and convenience of the vehicle; door lock control means controlling the vehicle door locks, including door locks, trunk locks, etc. It can control the locking or unlocking of door locks through key switches, remote controls, etc., improving the safety and convenience of the vehicle; wiper control means controlling the vehicle wipers, including the speed of the wipers, intermittent time, etc. It can automatically control the operation of the wipers according to factors such as the vehicle's driving speed and ambient rainfall, improving the safety and convenience of the vehicle; rearview mirror control means controlling the vehicle rearview mirrors, including the angle, folding, etc. of the rearview mirrors. It can control the angle and folding of the rearview mirrors through rearview mirror switches, remote controls, etc., improving the comfort and convenience of the vehicle. In addition, the BCM can also control other vehicle electrical devices, such as the audio system, air conditioning system, seat heating system, etc. It can achieve the integration and coordinated operation of the vehicle electronic control system through communication with other vehicle electronic control modules.

[0097] Optionally, referring to Figure 4 , in some embodiments, the detection process for abnormal power consumption includes: X1, start; X2, receive a wake-up instruction, that is, the battery management system obtains a wake-up instruction; X3, self-check, the battery management system checks the state of the battery management system; X4, standby state, that is, when the state of the battery management system is normal, the battery management system starts and enters the standby state; X5, fault, that is, when the state of the battery management system is abnormal, it is determined that the battery management system has a fault; X6, obtain the vehicle status information, that is, the battery management system obtains the status information of the vehicle; X7, not powered on high voltage, that is, when the vehicle status information indicates that the vehicle is in a sleep state or the devices in the high voltage domain stop working, the battery management system controls the second battery cell group to stop supplying power externally; X8, whether the first voltage is less than the preset voltage threshold, that is, determine whether the first voltage is less than the preset voltage threshold; X9, whether the number of times of charging when powered on high voltage is exceeded, that is, when the first voltage is less than the preset voltage threshold, determine whether the current number of times of performing the charging operation is greater than the preset number threshold.

[0098] X10. Report a fault, that is, when the current number of times of performing the power replenishment operation is greater than the preset number threshold, it is determined that the power consumption of the analog front-end module is abnormal, and the battery management system sends the fault information of the abnormal power consumption of the analog front-end module to the body controller; X11. Send a high-voltage command, that is, when the first voltage is less than the preset voltage threshold and the historical number of times of the historical power replenishment operation is less than or equal to the preset number threshold, the body controller sends a command for the power replenishment operation to the battery management system; X12. Apply high voltage, that is, the battery management system controls the second battery cell group to supply power externally and performs the power replenishment operation; X13. Whether it is in the intelligent power replenishment state, that is, to judge whether the power replenishment operation is being performed; X14. Whether the set power replenishment time is exceeded, that is, when the power replenishment operation is being performed, judge whether the charging duration from the second battery cell group in the battery pack to the first battery cell group is greater than the preset duration; X15. Execute low voltage and record the number of intelligent power replenishment times, that is, when the charging duration from the second battery cell group in the battery pack to the first battery cell group is greater than the preset duration, the battery management system controls the second battery cell group to stop supplying power externally and adds 1 to the historical number of times of the historical power replenishment operation to obtain the current number of times of performing the power replenishment operation; X16. Clear the number of intelligent power replenishment times, that is, when the battery management system switches from the sleep state to the working state, set the current number of times of performing the power replenishment operation to 0; X17. End.

[0099] In the related art, the battery cell groups in the high-voltage domain and the low-voltage domain are located at different positions of the vehicle, with low integration, resulting in complex circuit layout, large occupied space, and prone to problems such as electromagnetic interference during the electrical connection process, affecting the stability and reliability of the vehicle system.

[0100] In the embodiment of the present application, the first battery cell group in the low-voltage domain and the second battery cell group in the high-voltage domain are integrated in the battery pack, enhancing the integration, reducing the complexity of the circuit layout, having a small occupied space, and strong anti-electromagnetic interference ability, thereby improving the stability and reliability of the vehicle system.

[0101] In the related art, part of the battery cells in the battery cell group supply power to the analog front-end module. Due to reasons such as damage to the power supply line channel of the analog front-end module, the power consumption of the analog front-end module increases. After a long time, the voltage of the battery cells in the battery cell group that supply power to the analog front-end module is lower than that of other battery cells, resulting in the voltage stratification phenomenon of the battery cells in the battery cell group, and even problems such as over-discharge damage of the battery cells that supply power to the analog front-end module, requiring replacement of the entire battery cell group, increasing the maintenance cost of the battery pack.

[0102] In the embodiment of the present application, the battery cells in the battery pack are grouped into two partitions: the first battery cell group in the low-voltage domain and the second battery cell group in the high-voltage domain. Electrical isolation is performed on the first battery cell group in the low-voltage domain and the second battery cell group in the high-voltage domain. The first battery cell group or the second battery cell group in the battery pack is used to supply power to the analog front-end module in the battery management system. And when the first voltage is less than the preset voltage threshold, a charging operation is performed to avoid the voltage of the battery cells supplying power to the analog front-end module in the battery cell group being lower than that of other battery cells, thereby avoiding problems such as voltage stratification of the battery cells in the battery cell group and over-discharge damage of the battery cells supplying power to the analog front-end module, and reducing the problem of battery cell group scrapping.

[0103] In summary, first, when the first battery cell group is used to supply power to the analog front-end module, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than the preset voltage threshold, a charging operation is performed. Next, the current number of times of performing the charging operation is obtained. And when the current number of times is greater than the preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can timely know and handle it to avoid an increase in the energy consumption of the battery pack.

[0104] Optionally, the embodiment of the present application further provides an electronic device, including a processor, a memory, a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, it realizes each process of the above-mentioned method embodiment for detecting abnormal power consumption and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0105] It should be noted that the electronic device in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0106] Figure 5 Schematic diagram of the hardware structure of an electronic device for implementing the embodiment of the present application.

[0107] The electronic device 400 includes but is not limited to: a radio frequency unit 401, a network module 402, an audio output unit 403, an input unit 404, a sensor 405, a display unit 406, a user input unit 407, an interface unit 408, a memory 409, and a processor 410 and other components.

[0108] Those skilled in the art can understand that the electronic device 400 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 410 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. Figure 5 The structure of the electronic device shown does not limit the electronic device. The electronic device may include more or fewer components than shown, or combine some components, or have different component arrangements, which will not be elaborated here.

[0109] Among them, the processor 410 is used to obtain the first voltage of the first battery cell group when powering the analog front-end module through the first battery cell group.

[0110] When the first voltage is less than a preset voltage threshold, a power replenishment operation is performed.

[0111] Obtain the current number of times the power replenishment operation is performed, and when the current number of times is greater than a preset number threshold, determine that the analog front-end module has abnormal power consumption.

[0112] In the embodiments of the present application, first, when powering the analog front-end module through the first battery cell group, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than the preset voltage threshold, a power replenishment operation is performed. Next, the current number of times the power replenishment operation is performed is obtained, and when the current number of times is greater than the preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can know and process it in time to avoid an increase in the energy consumption of the battery pack.

[0113] Optionally, the processor 410 is further used to, when the first voltage is less than the preset voltage threshold and the historical number of times of the previously performed power replenishment operation is less than or equal to the preset number threshold, turn on the switching device that controls the second battery cell group to supply power externally, so that the second battery cell group charges the first battery cell group.

[0114] Optionally, the second voltage of the second battery cell group is greater than the first voltage.

[0115] Optionally, in the power replenishment operation, the charging duration of the second battery cell group charging the first battery cell group is a preset duration.

[0116] Optionally, when the battery management system is in the sleep state, the analog front-end module is powered through the first battery cell group; the processor 410 is further used to obtain the historical number of times of the power replenishment operation performed in the current sleep state of the battery management system; add 1 to the historical number of times to obtain the current number of times.

[0117] Optionally, the processor 410 is further used to set the current number of times to 0 when the battery management system switches from the sleep state to the working state.

[0118] In an embodiment of the present application, first, when powering the analog front-end module through the first battery cell group, the first voltage of the first battery cell group is obtained. Then, when the first voltage is less than a preset voltage threshold, a charging operation is performed. Next, the current number of times the charging operation is performed is obtained. And when the current number of times is greater than a preset number threshold, it is determined that the analog front-end module has abnormal power consumption, so that the staff can be informed and processed in time to avoid an increase in the energy consumption of the battery pack.

[0119] It should be understood that in an embodiment of the present application, the input unit 404 may include a graphics processing unit (GPU) 4041 and a microphone 4042. The graphics processing unit 4041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 406 may include a display panel 4061, and the display panel 4061 may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 407 includes at least one of a touch panel 4071 and other input devices 4072. The touch panel 4071 is also referred to as a touch screen. The touch panel 4071 may include two parts: a touch detection device and a touch controller. The other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0120] The memory 409 can be used to store software programs and various data. The memory 409 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 409 may include a volatile memory or a non-volatile memory, or the memory 409 may include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 409 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0121] The processor 410 may include one or more processing units; optionally, the processor 410 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 410 either.

[0122] The embodiments of the present application also provide a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, it implements each process of the embodiment of the above method for detecting abnormal power consumption and can achieve the same technical effect. To avoid repetition, it will not be described here again.

[0123] Among them, the processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disc, etc.

[0124] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement each process of the above embodiment of the power consumption anomaly detection method, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0125] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-a-chip, etc.

[0126] The embodiments of the present application also provide a vehicle, which includes the body controller as described above, or includes the electronic device as described above, or includes the readable storage medium as described above. The specific implementation process is similar to the foregoing, and will not be elaborated here.

[0127] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0128] Through the description of the above embodiments, those skilled in the art can clearly understand that the above method of the embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0129] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A method for detecting abnormal power consumption, characterized in that, The method includes: When powering the analog front-end module by the first battery cell group, obtaining a first voltage of the first battery cell group; When the first voltage is less than a preset voltage threshold, performing a charging operation; Obtaining a current number of times of performing the charging operation, and when the current number of times is greater than a preset number threshold, determining that the analog front-end module has abnormal power consumption.

2. The method according to claim 1, wherein The step of performing a charging operation when the first voltage is less than a preset voltage threshold includes: When the first voltage is less than the preset voltage threshold and a historical number of times of the previously performed charging operation is less than or equal to the preset number threshold, turning on a switching device that controls the second battery cell group to supply power externally, so that the second battery cell group charges the first battery cell group.

3. The method according to claim 2, wherein A second voltage of the second battery cell group is greater than the first voltage.

4. The method according to claim 2, wherein During the charging operation, a charging duration of the second battery cell group charging the first battery cell group is a preset duration.

5. The method according to claim 1, wherein When the battery management system is in a sleep state, powering the analog front-end module by the first battery cell group; The step of obtaining the current number of times of performing the charging operation includes: Obtaining a historical number of times of the previously performed charging operation in the current sleep state of the battery management system; Adding 1 to the historical number of times to obtain the current number of times.

6. The method according to claim 5, wherein The method further includes: When the battery management system switches from the sleep state to the working state, setting the current number of times to 0.

7. A controller, characterized in that, The controller is used to implement the steps of the method for detecting abnormal power consumption according to any one of claims 1 to 6.

8. An electronic device, characterized in that, It includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, it implements the steps of the method for detecting abnormal power consumption according to any one of claims 1 to 6.

9. A readable storage medium, characterized in that, A program or instruction is stored on the readable storage medium. When the program or instruction is executed by the processor, it implements the steps of the method for detecting abnormal power consumption according to any one of claims 1 to 6.

10. A vehicle, characterized in that, It includes the controller according to claim 7, or includes the electronic device according to claim 8, or includes the readable storage medium according to claim 9.

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