Soc calibration method, device and equipment of range-extended mine truck and computer readable storage medium

Abstract

The application provides a SOC calibration method, device and equipment of a range-extended minicar and a computer readable storage medium, comprising: receiving a SOC full charging calibration trigger signal; in response to the SOC full charging calibration trigger signal, determining whether the vehicle is in a non-driving safety state; in the case of determining that the vehicle is in a non-driving safety state, controlling the engine of the vehicle to drive the generator to charge the power battery based on a target power generation power determined based on the full charging voltage requirement of the power battery; when it is determined that the power battery reaches a full charging state, stopping charging the power battery, and calibrating the SOC value. Under the premise of not increasing the hardware cost, the battery is charged to the full charging state, the charging is stopped in time after the full charging condition is met, and the SOC calibration is performed, so that the battery management system obtains a reliable full charging reference point, the SOC estimation drift generated in long-term operation can be removed, the accuracy of the SOC display value is restored, the instrument information is ensured to be reliable, and the operation reliability and safety of the vehicle are improved.

Description

Technical Field

[0001] This invention relates to the field of SOC calibration technology, and specifically to a SOC calibration method, apparatus, device, and computer-readable storage medium for extended-range mining trucks. Background Technology

[0002] In the field of range-extended electric vehicles, especially in mining trucks used in mining operations that lack external charging interfaces, the state of charge (SOC) estimation of the power battery is a key basis for vehicle energy management, power output, and braking safety control. To ensure the normal operation and safety of the vehicle, the SOC estimate needs to continuously and accurately reflect the actual remaining battery capacity, avoiding unexpected torque limiting or insufficient braking capacity due to estimation errors.

[0003] In related technologies, battery management systems (BMS) typically use the ampere-hour integral method supplemented with open-circuit voltage correction to estimate state of charge (SOC). To eliminate long-term accumulated estimation errors, it is generally necessary to periodically charge the battery to full charge to trigger the BMS's full-charge calibration mechanism. However, in the application scenario of range-extended electric vehicles, the vehicle control strategy, in order to protect battery life and maintain electric braking capability, tends to keep the SOC within a preset intermediate range, so that the battery rarely reaches full charge during normal driving and power generation cycles. At the same time, due to the actual conditions in mining areas, these vehicles often lack external charging interfaces and cannot be fully charged through external charging stations like ordinary pure electric vehicles. This results in the BMS lacking the conditions to perform full-charge calibration, and the SOC estimation error continues to accumulate with the increase of operating time.

[0004] The above situation causes the displayed SOC value to gradually deviate from the actual available power after long-term operation, which may lead to problems such as sudden changes in driving range and unexpected power limitations, affecting the vehicle's operating efficiency and driving safety. Summary of the Invention

[0005] In view of this, the present invention aims to provide a SOC calibration method, apparatus, device, and computer-readable storage medium for range-extended mining trucks, in order to solve the technical problem in the prior art where the deviation between the displayed SOC value and the actual available power gradually increases, which may cause problems such as sudden changes in driving range and unexpected power limitations, affecting the vehicle's operating efficiency and driving safety.

[0006] This invention provides a SOC calibration method for extended-range mining trucks, the method comprising: Receive the SOC full charge calibration trigger signal; In response to the SOC full charge calibration trigger signal, determine whether the vehicle is in a non-driving safe state; When it is determined that the vehicle is in a non-driving safe state, the vehicle's engine is controlled to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery. When it is determined that the power battery has reached a fully charged state, charging to the power battery is stopped, and the SOC value is calibrated.

[0007] In one possible embodiment, the calculation process for the target power generation includes: The voltage control current is determined by the product of the voltage control current and the power battery voltage; the voltage control current is the charging current used to maintain battery voltage balance.

[0008] In one possible embodiment, the trigger signal is generated based on one of the following: Trigger commands input by the driver via the instrument panel or key combination; The vehicle controller automatically generates trigger commands according to a preset cycle; Or a trigger command sent by a remote device.

[0009] In one possible embodiment, determining whether the vehicle is in a non-driving safe state includes: Acquire vehicle speed signal, transmission gear signal, and parking brake status signal; The system determines whether the vehicle speed signal is zero, whether the gear signal is in neutral, and whether the status signal indicates that the parking brake is engaged. The vehicle is determined to be in a non-driving safe state if the vehicle speed signal is zero, the gear signal is in neutral, and the status signal indicates that the parking brake is engaged.

[0010] In one possible embodiment, during the charging process of the power battery, if any of the following conditions are detected: the vehicle speed signal is not zero, the gear position signal indicates that the vehicle is in neutral, or the status signal indicates that the parking brake is released, then the charging of the power battery is stopped and the SOC calibration is exited.

[0011] In one possible embodiment, the vehicle's engine drives a generator to charge the power battery to a target power output determined based on the full-charge voltage requirement of the power battery, while the power battery is prohibited from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device.

[0012] In one possible embodiment, the power battery is determined to be fully charged when the SOC value of the power battery reaches 100% or the battery voltage of the power battery reaches the full charge cutoff voltage.

[0013] Secondly, the present invention provides a SOC calibration device for extended-range mining trucks, the device comprising: The receiving module is used to receive the SOC full charge calibration trigger signal; The judgment module is used to determine whether the vehicle is in a non-driving safe state in response to the SOC full charge calibration trigger signal; The control module is used to control the vehicle's engine to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery when it is determined that the vehicle is in a non-driving safe state. The calibration module is used to stop charging the power battery and calibrate the SOC value when it is determined that the power battery has reached a fully charged state.

[0014] Thirdly, the present invention provides an electronic device, the device comprising: a memory and a processor; the memory being used to store relevant program code; the processor being used to call the program code to execute the SOC calibration method for extended-range mining trucks as described in any implementation of the first aspect.

[0015] Fourthly, the present invention provides a computer-readable storage medium for storing a computer program for executing the SOC calibration method for extended-range mining trucks described in any implementation of the first aspect.

[0016] Fifthly, the present invention provides a computer program product, the computer program product comprising a computer program / instruction, which, when executed by a processor, implements the SOC calibration method for extended-range mining trucks described in any of the implementations of the first aspect.

[0017] In the above implementation of the present invention, by receiving the SOC full charge calibration trigger signal, the calibration is no longer limited by external charging piles or the natural operating conditions of the battery, solving the problem of not being able to initiate full charging under conditions where there is no charging gun in the mining area; in response to the SOC full charge calibration trigger signal, it is determined whether the vehicle is in a non-driving safe state; if it is determined that the vehicle is in a non-driving safe state, the engine of the vehicle is controlled to drive the generator to ensure that the vehicle enters the charging process under the safe conditions of absolute stationary, transmission disconnection, and parking brake, providing a reliable safety guarantee for high-voltage operation, and charging the power battery with the target power generation power determined based on the full charge voltage requirement of the power battery; when it is determined that the power battery has reached the full charge state, charging is stopped and the SOC value is calibrated. By utilizing the vehicle's existing range extender as a controlled power source, the system precisely generates electricity based on the battery's full-charge voltage requirement. Without increasing the hardware costs of external charging interfaces or high-power chargers, it actively charges the battery to full charge. Once the full-charge condition is met, charging is stopped promptly, and SOC calibration is performed. This provides the battery management system with a reliable full-charge reference point, effectively eliminating SOC estimation drift caused by factors such as the ampere-hour integral method during long-term operation. This restores the long-term accuracy of the SOC display value, ensuring reliable instrument information, avoiding abnormal power limitations, and improving the vehicle's operational reliability and safety in the harsh environment of mining areas. Attached Figure Description

[0018] Figure 1a and Figure 1b This is a schematic diagram of the architecture of a SOC calibration system for an extended-range mining truck according to an embodiment of the present invention.

[0019] Figure 2 This is a flowchart illustrating a SOC calibration method for a range-extended mining truck provided in an embodiment of the present invention.

[0020] Figure 3 A schematic diagram of a SOC calibration device for an extended-range mining truck provided in this embodiment of the invention.

[0021] Figure 4 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the field of range-extended electric vehicles, the commonly used technical solution for accurately estimating the state of charge (SOC) of the power battery is to have the Battery Management System (BMS) calibrate the SOC estimate based on the full charge or full discharge conditions during the charging process. Specifically, this solution monitors the battery voltage or current, and when the battery is about to reach a fully charged or fully discharged state, it uses the relatively well-defined voltage-capacity relationship at that state to reset and correct the accumulated SOC estimation error. Its basic working principle is that the characteristics of the battery near the full charge or full discharge endpoint are relatively clear and can serve as a reliable reference point to eliminate long-term drift caused by factors such as current integration in the BMS. Its widespread application is mainly due to its ability to maintain the long-term accuracy of the SOC estimate with relatively low algorithmic complexity.

[0024] However, when this solution is applied to range-extended mining trucks without external charging interfaces in mining operations, its performance is less than ideal. Specifically, to ensure accurate SOC estimation, the solution's inherent design relies on the battery periodically reaching full charge or full discharge states. However, in actual mining truck operation, to optimize battery life and driving safety, the vehicle control strategy deliberately limits the battery's operating range to a medium charge level and avoids high-power consumption when stationary. This results in the battery failing to reach full charge or full discharge endpoints for extended periods, preventing the calibration conditions from being triggered. Specifically, in continuous mining operations, because the vehicle lacks plug-in charging capabilities and to ensure braking safety, the battery is prevented from being completely discharged. This causes the BMS's SOC estimation error to accumulate over time, ultimately leading to a discrepancy between the displayed range and the actual range, causing operational management chaos.

[0025] To address this, this invention constructs a dynamic calibration mechanism that links vehicle safety status with the range extender's power generation, transforming the calibration process from passive waiting to active execution. This allows the battery to reach full charge without external charging, eliminating the need for additional charging hardware. Specifically, it provides a SOC calibration method for range-extended mining trucks. Utilizing the vehicle's own range extender as a controlled power source, under specific operating conditions where safety is ensured and external power consumption is prohibited, the system actively generates electricity to charge the battery until full charge, based on the battery's full-charge voltage requirement. This solves the technical problem of uncalibrated SOC errors caused by the inability to connect to charging stations, achieving the technical effect of maintaining long-term accurate and reliable SOC estimation under the harsh conditions of mining areas.

[0026] Figure 1 is a schematic diagram of the SOC calibration system for extended-range mining trucks according to an embodiment of the present invention. Figure 1aAs shown, the system includes a vehicle controller (VCU) 100, a transmission control unit (TCU) 110, a motor control unit (MCU) 120, a drive motor 130, a transmission 140, and a shift actuator 150. Communication connections exist between the VCU and TCU, between the VCU and MCU, and between the TCU and the shift actuator. Figure 1b As shown, the system also includes an engine 160, an integrated starter-generator ISG motor 170, and a power battery 180. The MCU and drive motor, as well as the ISG motor and power battery, are connected via communication lines to exchange control commands and status information. The engine and ISG motor are mechanically connected, as are the drive motor and transmission, and the shift actuator and transmission, thus forming a power transmission link capable of both pure electric drive and range-extended power generation. When this range-extended mining truck is operating in a mining area, the vehicle typically lacks an external charging interface. The state of charge (SOC) of the power battery circulates within its optimal operating range (20% to 80%) for extended periods, making it difficult to reach a full charge. This prevents the battery management system (BMS) from performing full-charge calibration, causing SOC estimation errors to gradually accumulate.

[0027] Figure 2 A schematic flowchart illustrating a State of Charge (SOC) calibration method for a range-extended mining truck according to an embodiment of the present invention is shown. The method is executed by a vehicle controller, which may be a vehicle control unit (VCU) or a domain controller integrating range extender control and battery management functions. Specifically, the method includes steps S210 to S240.

[0028] Step S210: Receive the SOC full charge calibration trigger signal.

[0029] In this embodiment, the SOC full-charge calibration trigger signal is used to initiate an active full-charge calibration process, and it can be generated from various sources. For example, a trigger command input by the driver via the instrument panel or key combination can form the trigger signal; a trigger command automatically generated by the vehicle controller according to a preset time period, such as accumulated driving time or calendar time, can also serve as the trigger signal; in addition, trigger commands sent through a remote monitoring platform or handheld terminal can also trigger the calibration process. The SOC full-charge calibration trigger signal is a prerequisite for starting the entire calibration process, enabling extended-range mining trucks without external charging guns to actively initiate full-charge operations as needed or at preset maintenance nodes.

[0030] In one embodiment, the trigger signal is generated based on one of the following: Trigger commands input by the driver via the instrument panel or key combination; The vehicle controller automatically generates trigger commands according to a preset cycle; Or a trigger command sent by a remote device.

[0031] In practical implementation, the trigger signal can be generated by the driver through a trigger command input via the instrument panel or a combination of buttons. For example, physical buttons or virtual buttons on the touchscreen can be set on the instrument panel of the mining truck cab, allowing the driver to manually initiate calibration by pressing these buttons. In other embodiments, the trigger signal can also be automatically generated by the vehicle controller according to a preset cycle, such as automatically initiating a full-charge calibration request after the vehicle completes a certain number of work cycles or accumulates a certain amount of operating time. Furthermore, remote devices such as fleet management platforms or mobile applications can also send trigger commands via wireless communication modules, enabling maintenance personnel to remotely centrally schedule calibration tasks for multiple vehicles. This allows extended-range mining trucks without external charging guns to proactively initiate full-charge operations based on actual needs or at preset maintenance nodes.

[0032] Step S220: In response to the SOC full charge calibration trigger signal, determine whether the vehicle is in a non-driving safe state.

[0033] In this embodiment, a non-driving safe state refers to a state where the vehicle is stationary and the power transmission link is reliably disconnected, with no risk of accidental movement. This state can be determined by considering multiple vehicle operating parameters. For example, the vehicle speed signal, the transmission gear position signal, and the parking brake status signal can be acquired. When the vehicle speed signal is zero, the gear position signal indicates the transmission is in neutral, and the status signal indicates the parking brake is engaged, the vehicle is determined to be in a non-driving safe state. It should be noted that the logic based on the above three conditions is only one possible implementation. Other safety verification conditions can also be added, such as detecting the steering wheel angle, brake pedal depth, or confirming the road slope is within the allowable range using an accelerometer, as long as these ensure the vehicle remains absolutely stationary during full-charge calibration. This establishes a safety barrier for high-voltage charging operations, preventing dangers caused by performing full-charge calibration while the vehicle is in motion or driving.

[0034] In one embodiment, determining whether the vehicle is in a non-driving safe state includes: Acquire vehicle speed signal, transmission gear signal, and parking brake status signal; The system determines whether the vehicle speed signal is zero, whether the gear signal is in neutral, and whether the status signal indicates that the parking brake is engaged. The vehicle is determined to be in a non-driving safe state if the vehicle speed signal is zero, the gear signal is in neutral, and the status signal indicates that the parking brake is engaged.

[0035] In the specific implementation process, the vehicle speed signal, transmission gear position signal, and parking brake status signal are acquired. Then, it is determined whether the vehicle speed signal is zero, the gear position signal is in neutral, and the status signal indicates that the parking brake is engaged. Only when the vehicle speed signal is zero, the gear position signal is in neutral, and the parking brake is engaged simultaneously is the vehicle determined to be in a non-driving safe state. This combined verification ensures the vehicle is absolutely stationary from three independent dimensions: drive wheel rotation, transmission system connection, and parking brake, avoiding misjudgments due to a single sensor malfunction or signal error. For example, relying solely on a zero vehicle speed signal might incorrectly assume the vehicle is stationary if the speed sensor is disconnected or malfunctioning; adding detection of transmission neutral and parking brake status significantly improves the robustness of the judgment. Understandably, other equivalent safety conditions can be added to the determination of non-driving safe states, such as vehicle body posture detection, door closure status, or seat occupancy signals, to further strengthen the safety logic.

[0036] Step S230: When it is determined that the vehicle is in a non-driving safe state, control the vehicle's engine to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery.

[0037] In this embodiment, once the vehicle meets the non-driving safety requirements, the vehicle controller uses the range extender as a controllable charging source, prohibits the vehicle from entering drive mode, and starts the engine to drive the ISG motor to generate electricity. The target power generation is not a fixed value, but is calculated in real-time or periodically based on the full-charge voltage requirement of the power battery. The full-charge voltage requirement can be reflected in the voltage-limiting charging curve or voltage-controlled current required by the BMS when the battery is close to full charge. For example, in one implementation, the target power generation can be determined based on the product of the voltage-controlled current and the power battery voltage, where the voltage-controlled current is the charging current used to maintain the voltage balance of individual battery cells or modules. The target power generation can also be extracted from a pre-calibrated power curve using a lookup table method, or estimated using a model predictive control algorithm, as long as it can match the voltage rise characteristics of the battery near full charge and avoid overvoltage or overcurrent. During charging, the vehicle controller can also prohibit the power battery from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device such as the air conditioning compressor, hydraulic retarder, power take-off, etc., to avoid any discharge behavior interfering with the full-charge calibration or causing additional loss of charging power. Through this controlled combination of extended-range power generation and prohibited discharge, the battery can be gradually pushed to full charge while in a safe, stationary state.

[0038] In one embodiment, the calculation process for the target power generation includes: The voltage control current is determined by the product of the voltage control current and the power battery voltage; the voltage control current is the charging current used to maintain battery voltage balance.

[0039] In the specific implementation process, the calculation of the target power generation is further limited to: determining it based on the product of the voltage-controlled current and the power battery voltage, i.e., target power generation = voltage-controlled current. The power battery voltage. The voltage-controlled current (VDC) is the charging current used to maintain battery voltage balance. Its value is calculated in real-time by the Battery Management System (BMS) based on factors such as the current battery state of charge, temperature, internal resistance, and individual cell voltage difference, and sent to the vehicle controller. The vehicle controller multiplies this VDC by the currently collected total battery voltage to obtain the desired target power output. Due to mechanical losses and inverter losses in the generator system, the actual charging current output to the battery is allowed to be slightly less than the aforementioned VDC; this deviation is acceptable. Furthermore, to achieve a balance between the engine's dynamic response capability and real-time economy, the target power output is adjusted every predetermined time interval. As a numerical example, this predetermined time interval is 10-15 seconds. If the adjustment is too frequent, such as once per second, the engine and its controller cannot respond promptly to rapid changes in power commands, potentially causing speed fluctuations or overshoot. If the adjustment cycle is too long, such as once every 30 seconds or one minute, it cannot keep up with the rapid voltage rise of the battery at the end of a full charge, leading to decreased charging efficiency or energy waste. Therefore, adjusting the target power generation every 10-15 seconds can keep the power generation as close as possible to the real-time full charge demand of the battery within the range that the engine can respond to, thus achieving an economical and stable charging process.

[0040] In one embodiment, to provide dynamic protection during charging and prevent safety issues arising from unexpected interruptions to the calibration process, the present invention further provides an interruption mechanism. Specifically: If, during the charging process of the power battery, any of the following conditions are detected: the vehicle speed signal is not zero, the gear position signal indicates that the vehicle is in neutral, or the status signal indicates that the parking brake is released, then charging of the power battery will stop and the SOC calibration will be exited.

[0041] Specifically, during the charging process of the power battery, the vehicle controller continuously monitors the aforementioned safety conditions. If any of the following conditions are detected: the vehicle speed signal is not zero, the gear position signal indicates that the vehicle is out of neutral, or the status signal indicates that the parking brake is released, charging of the power battery is immediately stopped, and the SOC calibration process is exited. This real-time monitoring interruption design ensures that high-voltage charging can be immediately cut off should the driver make any erroneous operation or a system malfunction cause the vehicle to move, maximizing personal and equipment safety. After exiting calibration, the system can resume normal range-extending mode, maintaining the vehicle's basic driving capability.

[0042] In one embodiment, to prevent the ineffective consumption of battery power during full-charge calibration and further improve charging efficiency and calibration success rate, a strategy of prohibiting discharge can be implemented during the charging phase. Specifically: While controlling the vehicle's engine to drive the generator to charge the power battery at a target power output determined based on the full-charge voltage requirement of the power battery, the power battery is prohibited from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device.

[0043] During the entire period when the engine drives the generator to charge the power battery, the power battery is prohibited from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device. This means that the traction current of the drive motor is cut off, and the power supply to high-power energy-consuming accessories such as the in-cylinder brake solenoid valve, air conditioning compressor, and hydraulic power steering pump is also temporarily prohibited or limited. In particular, for range-extended mining trucks, the engine in-cylinder brake power-consuming function, which may be triggered under normal high SOC conditions, is also prohibited from being triggered during this calibration process, because this function consumes battery energy and offsets the charging effect. By prohibiting discharge, it is ensured that the electrical energy generated by the range extender is used as much as possible to increase the battery's SOC, enabling it to reach its full charge point.

[0044] Step S240: When it is determined that the power battery has reached a fully charged state, stop charging the power battery and calibrate the SOC value.

[0045] In this embodiment, the determination of full charge status can be based on real-time battery parameters. When the SOC value of the power battery reaches 100%, or the voltage of the power battery reaches the preset full charge cutoff voltage, the battery is considered to have reached full charge status. At this time, the vehicle controller controls the engine and generator to stop power output and stop charging the power battery. Subsequently, a SOC calibration operation is performed, such as resetting the current SOC value to 100%, or clearing the accumulated error to zero according to the BMS's internal state machine and updating the corresponding calibration flag. Thus, after the battery management system (BMS) has undergone a complete full charge process, its voltage control strategy can be implemented normally, the SOC estimation accuracy is restored, and the error is eliminated.

[0046] Regarding how to accurately determine whether a power battery has reached full charge, this invention provides operable determination criteria. Specifically: When the SOC value of the power battery reaches 100% or the battery voltage of the power battery reaches the full charge cutoff voltage, it is determined that the power battery has reached the full charge state.

[0047] In practice, the determination of full charge status can be achieved by directly using a State of Charge (SOC) value reaching 100%, by using battery voltage, or by a combination of both. When the SOC value of the power battery reaches 100%, or when the battery voltage reaches the full charge cutoff voltage (such as the upper limit of the total voltage of a specific series-connected cell), the battery is considered to be fully charged. When using voltage as the criterion, the preset full charge cutoff voltage threshold in the Battery Management System (BMS) can be referenced. This threshold is usually obtained through battery electrochemical characteristic calibration. For example, the typical full charge cutoff voltage for a lithium iron phosphate battery cell is 3.65 volts, and the total system cutoff voltage is the product of the cell voltage and the number of cells in series. After the power battery voltage reaches this cutoff voltage and remains stable for a certain period, the battery can be considered fully charged, and SOC calibration can then be performed. This voltage-based criterion is more direct and can avoid misjudgments caused by SOC estimation errors.

[0048] Based on the method provided in the above embodiments, by receiving the SOC full charge calibration trigger signal, the calibration is no longer limited by external charging piles or the natural operating conditions of the battery, solving the problem of not being able to initiate full charging under conditions where there is no charging gun in the mining area; in response to the SOC full charge calibration trigger signal, it is determined whether the vehicle is in a non-driving safe state; if it is determined that the vehicle is in a non-driving safe state, the engine of the vehicle is controlled to drive the generator to ensure that the vehicle enters the charging process under the safe conditions of absolute stationary, transmission disconnection, and parking brake, providing reliable safety guarantee for high-voltage operation, and charging the power battery with the target power generation power determined based on the full charge voltage requirement of the power battery; when it is determined that the power battery has reached the full charge state, charging is stopped and the SOC value is calibrated. By utilizing the vehicle's existing range extender as a controlled power source, the system precisely generates electricity based on the battery's full-charge voltage requirement. Without increasing the hardware costs of external charging interfaces or high-power chargers, it actively charges the battery to full charge. Once the full-charge condition is met, charging is stopped promptly, and SOC calibration is performed. This provides the battery management system with a reliable full-charge reference point, effectively eliminating SOC estimation drift caused by factors such as the ampere-hour integral method during long-term operation. This restores the long-term accuracy of the SOC display value, ensuring reliable instrument information, avoiding abnormal power limitations, and improving the vehicle's operational reliability and safety in the harsh environment of mining areas.

[0049] Based on the above method embodiments, this invention also provides a SOC calibration device for extended-range mining trucks. See also... Figure 3 The diagram shown is a schematic of a SOC calibration device for an extended-range mining truck provided in an embodiment of the present invention.

[0050] The device 300 includes: Receiver module 301 is used to receive the SOC full charge calibration trigger signal; The judgment module 302 is used to determine whether the vehicle is in a non-driving safe state in response to the SOC full charge calibration trigger signal; The control module 303 is used to control the vehicle's engine to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery when the vehicle is determined to be in a non-driving safe state. The calibration module 304 is used to stop charging the power battery and calibrate the SOC value when it is determined that the power battery has reached a fully charged state.

[0051] In one possible implementation, the calculation process for the target power generation includes: The voltage control current is determined by the product of the voltage control current and the power battery voltage; the voltage control current is the charging current used to maintain battery voltage balance.

[0052] In one possible implementation, the trigger signal is generated based on one of the following: Trigger commands input by the driver via the instrument panel or key combination; The vehicle controller automatically generates trigger commands according to a preset cycle; Or a trigger command sent by a remote device.

[0053] In one possible implementation, determining whether the vehicle is in a non-driving safe state includes: Acquire vehicle speed signal, transmission gear signal, and parking brake status signal; The system determines whether the vehicle speed signal is zero, whether the gear signal is in neutral, and whether the status signal indicates that the parking brake is engaged. The vehicle is determined to be in a non-driving safe state if the vehicle speed signal is zero, the gear signal is in neutral, and the status signal indicates that the parking brake is engaged.

[0054] In one possible implementation, during the charging process of the power battery, if any of the following conditions are detected: the vehicle speed signal is not zero, the gear position signal indicates that the vehicle is in neutral, or the status signal indicates that the parking brake is released, then the charging of the power battery is stopped and the SOC calibration is exited.

[0055] In one possible implementation, the vehicle's engine drives a generator to charge the power battery to a target power output determined based on the full-charge voltage requirement of the power battery, while the power battery is prohibited from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device.

[0056] In one possible implementation, the power battery is determined to be fully charged when the SOC value of the power battery reaches 100% or the battery voltage of the power battery reaches the full charge cutoff voltage.

[0057] See Figure 4 , Figure 4 This is a schematic diagram of an electronic device provided in an embodiment of the present invention.

[0058] The electronic device 400 includes a memory 401 and a processor 402; the memory 401 is used to store relevant program code; the processor 402 is used to call the program code to execute the SOC calibration method for the extended-range mining card described in the above method embodiment.

[0059] Furthermore, embodiments of the present invention also provide a computer-readable storage medium for storing a computer program for executing the SOC calibration method for extended-range mining trucks described in the above method embodiments.

[0060] This invention also provides a computer program product, which includes a computer program / instruction. When the computer program / instruction is executed by a processor, it implements the SOC calibration method for extended-range mining trucks described in the above method embodiments.

[0061] It should be noted that the computer-readable medium described above in this invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0062] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0063] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. In particular, for system or device embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The device embodiments described above are merely illustrative. The units or modules described as separate components may or may not be physically separate. The components shown as units or modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network units. Some or all of the units or modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0064] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functions, and operations that may be implemented according to various embodiments of the invention, including methods, apparatus, and devices. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0065] It should be understood that in this invention, "at least one (item)" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0066] It should also be noted that, in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The steps of the methods or algorithms described in conjunction with the embodiments disclosed in this invention can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A SOC calibration method for a range-extended mining truck, characterized in that, The method, executed by the vehicle controller, includes: Receive the SOC full charge calibration trigger signal; In response to the SOC full charge calibration trigger signal, determine whether the vehicle is in a non-driving safe state; When it is determined that the vehicle is in a non-driving safe state, the engine of the vehicle is controlled to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery. When it is determined that the power battery has reached a fully charged state, charging to the power battery is stopped, and the SOC value is calibrated.

2. The method according to claim 1, characterized in that, The calculation process for the target power generation includes: The voltage control current is determined by the product of the voltage control current and the power battery voltage; the voltage control current is the charging current used to maintain battery voltage balance.

3. The method according to claim 1, characterized in that, The trigger signal is generated based on one of the following: Trigger commands input by the driver via the instrument panel or key combination; The vehicle controller automatically generates trigger commands according to a preset cycle; Or a trigger command sent by a remote device.

4. The method according to claim 1, characterized in that, The determination of whether a vehicle is in a non-driving safe state includes: Acquire vehicle speed signal, transmission gear signal, and parking brake status signal; The system determines whether the vehicle speed signal is zero, whether the gear signal is in neutral, and whether the status signal indicates that the parking brake is engaged. The vehicle is determined to be in a non-driving safe state if the vehicle speed signal is zero, the gear signal is in neutral, and the status signal indicates that the parking brake is engaged.

5. The method according to claim 4, characterized in that, If, during the charging process of the power battery, any of the following conditions are detected: the vehicle speed signal is not zero, the gear position signal indicates that the vehicle is in neutral, or the status signal indicates that the parking brake is released, then charging of the power battery will stop and the SOC calibration will be exited.

6. The method according to claim 1, characterized in that, While controlling the vehicle's engine to drive the generator to charge the power battery at a target power output determined based on the full-charge voltage requirement of the power battery, the power battery is prohibited from outputting electrical energy to the drive motor and at least one auxiliary energy-consuming device.

7. The method according to claim 1, characterized in that, When the SOC value of the power battery reaches 100% or the battery voltage of the power battery reaches the full charge cutoff voltage, it is determined that the power battery has reached the full charge state.

8. A SOC calibration device for an extended-range mining truck, characterized in that, The device includes: The receiving module is used to receive the SOC full charge calibration trigger signal; The judgment module is used to determine whether the vehicle is in a non-driving safe state in response to the SOC full charge calibration trigger signal; The control module is used to control the vehicle's engine to drive the generator to charge the power battery with a target power output determined based on the full charge voltage requirement of the power battery when it is determined that the vehicle is in a non-driving safe state. The calibration module is used to stop charging the power battery and calibrate the SOC value when it is determined that the power battery has reached a fully charged state.

9. An electronic device, characterized in that, The device includes: a memory and a processor; the memory is used to store relevant program code; the processor is used to call the program code to execute the SOC calibration method for the extended-range mining truck according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program for executing the SOC calibration method for the extended-range mining truck according to any one of claims 1 to 7.

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