Battery feeding post-processing method and device, electronic equipment and readable storage medium

Abstract

This invention provides a battery post-discharge processing method, apparatus, electronic device, and readable storage medium, relating to the field of automotive technology and applied to a vehicle's host computer. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The BSG integrated unit is connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. The method includes: determining whether the 48V electrical system can be powered on; obtaining the battery discharge level of the 48V electrical system; if it is moderately discharged, starting the engine with a first starter motor to make the engine's minimum speed higher than a first preset value, requesting the BSG integrated unit to enter voltage mode idling and charge the 48V electrical system's battery until the battery discharge level of the 48V electrical system is no discharge or slightly discharged. This solves the problem in the prior art where the battery discharge situation cannot be resolved in a timely and effective manner when the vehicle is equipped with a 48V electrical system.

Description

Technical Field

[0001] The present invention relates to the field of automotive technology, and in particular to a battery post-discharge processing method, apparatus, electronic device, and readable storage medium. Background Technology

[0002] With China's increasing emphasis on environmental protection, the nationwide implementation of GB 18352.6-2016 "Limits and Measurement Methods for Pollutant Emissions from Light-Duty Vehicles (China VI)" and the advancement of the passenger car fuel consumption implementation phase, the combination of small and medium displacement internal combustion engines with 48V mild hybrid systems has been widely adopted. The combination of internal combustion engines and 48V mild hybrid systems offers advantages such as minimal cost increase and significant reductions in emissions and fuel consumption, leading to its widespread use. As its application expands, related control strategies for 48V systems are also being gradually improved. A 48V system can essentially achieve functions such as power generation for a 12V motor, 48V motor starting and stopping, engine shutdown assistance, acceleration assistance, 48V electrical system power generation for coasting energy recovery, braking energy recovery, idle torque compensation, and response to external high-torque requests. However, the application of 48V systems also correspondingly increases the number of electrical system components, enhances the complexity of the vehicle's electrical system, increases failure points and failure modes, and reduces system robustness.

[0003] For existing systems equipped with a 48V electrical system that eliminates the 12V generator, the 48V battery's charging and discharging capacity is too low when depleted. The 48V motor also needs to provide energy to the vehicle's 12V system. Under this operating condition, conventional torque control may not effectively protect the 48V battery, leading to overcharging or over-discharging and severely impacting battery life. Further depletion of the 48V battery can cause it to enter a protection trip, disconnecting the relay and ceasing system operation. Once the 48V battery is disconnected, the 48V system stops working and cannot continue to supply energy to the 12V system to meet the vehicle's 12V electrical load requirements. When the 12V battery's charge is depleted to the point where it can no longer sustain vehicle operation, the vehicle will break down.

[0004] Therefore, how to better handle battery depletion when a vehicle is equipped with a 48V electrical system has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides a method, apparatus, electronic device, and readable storage medium for handling battery depletion after discharge, addressing the shortcomings of existing technologies in handling battery depletion in vehicles equipped with 48V electrical systems. To solve the above-mentioned technical problems, this invention is implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a battery post-discharge processing method applied to a host computer of a vehicle. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The 12V electrical system includes a first starter motor. The BSG integrated unit is connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. The method includes:

[0007] Determine if a 48V electrical system is supported for power-on.

[0008] Obtain the battery power level of the 48V electrical system;

[0009] If the power supply is moderate, the first starter motor will start the engine so that the minimum speed of the engine is higher than the first preset value, and the BSG integrated machine will be requested to enter the voltage mode idle speed and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply.

[0010] Optionally, the 48V electrical system further includes a 48V motor, and the method further includes:

[0011] If the battery of the 48V electrical system is not powered or slightly powered, the 48V motor will start the engine, and the BSG integrated machine will be requested to enter the torque control mode until the battery of the 48V electrical system is restored.

[0012] Optionally, the 48V electrical system further includes a battery management system, and before determining whether to support powering on the 48V electrical system, the following steps are also included:

[0013] Determine whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty.

[0014] Optionally, before determining whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty, the method further includes:

[0015] Determine whether the voltage of the 12V electrical system meets the 48V power-on requirement. If not, prompt the user to connect an external 12V voltage.

[0016] Optionally, the method further includes:

[0017] If the 48V electrical system is not supported for power-on, the user will be prompted that there is a 48V electrical system fault.

[0018] Optionally, after notifying the user of a 48V electrical system fault, the system may further include:

[0019] The battery power level of the 48V electrical system is obtained. If it is severely depleted or the 48V battery is disconnected, the first starter motor is used to start the engine so that the minimum speed of the engine is higher than the second preset value. The DC converter is then requested to use the battery of the 12V electrical system for pre-charging so that the high voltage terminal of the DC converter is raised to the battery-free mode operating voltage of the BSG integrated machine. The DC converter is then requested to switch its operating state to buck mode.

[0020] Optionally, if the battery of the 12V electrical system is not depleted or is only slightly depleted, and the battery of the 48V electrical system is not depleted or is only slightly depleted, the method further includes: starting the engine so that the BSG integrated unit enters torque control mode to generate electricity.

[0021] Secondly, embodiments of the present invention provide a battery power supply post-processing device applied to a host computer of a vehicle. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The 12V electrical system includes a first starter motor. The BSG integrated unit is connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. The device includes:

[0022] The judgment module is used to determine whether a 48V electrical system is supported for power-on.

[0023] The acquisition module is used to acquire the battery power level of the 48V electrical system;

[0024] The execution module is configured to, if the power supply is moderate, start the engine with the first starter motor so that the minimum speed of the engine is higher than a first preset value, and request the BSG integrated machine to enter the voltage mode idle speed and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply.

[0025] Thirdly, embodiments of the present invention provide an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, it implements the steps in the battery post-discharge processing method as described in any of the first aspects.

[0026] Fourthly, embodiments of the present invention provide a readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps in the battery post-discharge processing method as described in any of the first aspects.

[0027] This invention proposes a battery power-off processing method for a vehicle's host computer. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The method first determines whether the 48V electrical system can be powered on, obtaining the battery power level of the 48V electrical system. If it is moderately power-off, the first starter motor starts the engine, raising the engine's minimum speed above a first preset value. The BSG integrated unit is then requested to enter voltage mode idling and charge the 48V electrical system battery until the battery power level is no power-off or slightly power-off. This method does not increase the cost of component hardware by orders of magnitude, has a high degree of universality, and wide applicability. It can effectively address situations where the 48V and 12V batteries are power-off, have severely limited charging and discharging power, or are damaged due to malfunctions. It effectively improves the stability of the vehicle's power supply system, reduces the risk of vehicle breakdowns due to power failure, and reduces after-sales claims costs caused by power failure. It can also be extended to most 48V system vehicles that have eliminated the 12V generator. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 This is one of the flowcharts illustrating a battery post-discharge processing method provided in an embodiment of the present invention.

[0030] Figure 2 This is one of the structural diagrams of an electrical system that applies a battery post-discharge processing method, as provided in an embodiment of the present invention.

[0031] Figure 3 This is a second schematic flowchart of a battery post-discharge processing method provided in an embodiment of the present invention.

[0032] Figure 4 This is the second structural diagram of an electrical system that applies a battery post-discharge processing method, as provided in an embodiment of the present invention.

[0033] Figure 5 This is one of the structural schematic diagrams of a battery post-feeding treatment device provided in an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0035] 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, not all, of the embodiments of the present invention. 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.

[0036] In existing technologies, for pure internal combustion engine vehicles equipped only with a 12V electrical system, there are relatively mature solutions for 12V battery depletion. Depending on the sensor configuration, the main methods are as follows: ① Using a non-controllable alternator. The engine management system collects the 12V battery voltage or the battery charge sensor (if any) reports the SOC value (State of Charge, the percentage of usable charge in the battery relative to its nominal capacity; the remaining charge reflects the battery's state of charge). When the battery voltage / SOC ratio falls below a certain limit, the engine's minimum speed (idle speed) is increased to enhance the alternator's power generation capacity. ② Using a controllable alternator. The engine management system collects the 12V battery voltage or the battery charge sensor (if any) reports the SOC value. The controllable alternator's power generation is controlled in a closed-loop manner. If the SOC / voltage control target still cannot be achieved, the engine's minimum speed is increased.

[0037] For vehicles that have both 48V and 12V electrical systems, there is also the issue of the 48V battery being depleted. Generally, the discharge capacity of the 48V battery is used to limit the discharge of the 48V motor, allowing only the 48V motor to generate electricity to replenish the 48V battery.

[0038] For existing systems equipped with a 48V electrical system that eliminates the 12V generator, the 48V battery's charging and discharging capacity is too low when depleted. The 48V motor also needs to provide energy to the vehicle's 12V system. Under this operating condition, conventional torque control may not effectively protect the 48V battery, leading to overcharging or over-discharging and severely impacting battery life. Further depletion of the 48V battery can cause it to enter a protection trip, disconnecting the relay and ceasing system operation. Once the 48V battery is disconnected, the 48V system stops working and cannot continue to supply energy to the 12V system to meet the vehicle's 12V electrical load requirements. When the 12V battery's charge is depleted to the point where it can no longer sustain vehicle operation, the vehicle will break down.

[0039] This application first proposes a battery depletion post-discharge treatment method, which can effectively address situations where 48V and 12V batteries are depleted, their charging and discharging power is severely limited, or they are damaged due to malfunction. This effectively improves the stability of the vehicle's power supply system, reduces the risk of vehicle breakdowns due to battery depletion, and reduces after-sales claims costs caused by battery depletion. It can also be extended to most 48V system vehicles that have eliminated the 12V alternator. This solves the problem in existing technologies where battery depletion in vehicles equipped with 48V electrical systems cannot be addressed promptly and effectively.

[0040] Please refer to Figure 1 , Figure 1 This is one of the flowcharts illustrating a battery post-discharge treatment method provided in an embodiment of the present invention. The present invention provides a battery post-discharge treatment method applied to a host computer of a vehicle. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The 12V electrical system includes a first starter motor. The BSG integrated unit is connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. The method includes:

[0041] Step S11: Determine whether a 48V electrical system is supported for power-on.

[0042] For the structure of the 48V electrical system in the vehicle as described in this embodiment of the invention, please refer to [reference needed]. Figure 2 , Figure 2 This is one of the structural diagrams of an electrical system for applying a battery-powered post-processing method, provided in an embodiment of the present invention. It can be understood that this electrical system mainly consists of a BSG (Belt-Driven Starter Generator, i.e., a unit that integrates starting and power generation using belt drive), a 48V electrical system, a DC-DC converter, and a 12V electrical system. The BSG includes a BSG motor and a built-in inverter; the 48V electrical system includes 48V electrical equipment and a 48V battery; the 12V electrical system includes a 12V battery, a first starter (i.e., a 12V starter motor), and 12V electrical equipment. The BSG and the 48V electrical system are connected in parallel to one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. In this embodiment of the invention, the method is mainly applied to the vehicle's host computer, which generally includes, but is not limited to, a vehicle control unit (VCU) or an engine control module (ECM).

[0043] At the control level, the BSG integrated unit is a generator-powered motor assembly with a built-in controller. It can feed back information such as current voltage, current, torque, capacity, operating mode, and fault status to the host computer, and respond to the host computer's requests for operating mode, torque, voltage, and speed. Operating modes generally include neutral mode, torque mode, voltage mode, and battery-free voltage mode. The DC-DC converter has functions for converting low-voltage DC to high-voltage and high-voltage DC to low-voltage DC. It also has a built-in controller that can feed back information such as current high and low voltage terminals, operating mode, fault status, and conversion capacity to the host computer, and respond to the host computer's requests for operating mode, voltage, and current. It generally has 12V to 48V capability (using a 12V battery to power a 48V system) and 48V to 12V capability (using a 48V battery or BSG to power a 12V system). A 48V electrical system has a built-in Battery Management System (BMS), which can provide feedback to the host computer on current voltage, current, State of Charge (SOC), State of Health (SOH), fault status, operating mode, and relay closure status, and respond to the host computer's requests for relay closure status. The BSG, BMS, and DC-DC converter constitute the 48V electrical system. A 12V electrical system typically includes sensors and only provides status feedback, displaying battery SOC, current, voltage, and SOH.

[0044] For vehicles equipped with both 12V and 48V systems and without a 12V generator, the host computer detects that the 12V battery voltage or state of charge meets the 48V power-on requirements. The host computer then requests the DC-DC converter to perform a pre-charge operation, whereby the DC-DC converter uses the energy of the 12V battery to make its high-voltage terminal voltage close to that of the 48V battery. After that, the host computer requests the BMS to close the 48V battery relay, thus completing the power-on of the 48V electrical system.

[0045] Step S12: Obtain the battery power level of the 48V electrical system.

[0046] It is understandable that the battery depletion level of a 48V electrical system can be obtained, including but not limited to, by comparing the current battery voltage of the 48V electrical system with the target setting value. The battery depletion level of a 48V electrical system is typically categorized as: slightly depleted, moderately depleted, and severely depleted.

[0047] Step S13: If the power supply is moderate, the first starter motor starts the engine so that the minimum speed of the engine is higher than the first preset value, and requests the BSG integrated machine to enter the voltage mode idle speed and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply.

[0048] Please refer to Figure 3 , Figure 3 This is a second schematic flowchart of a battery post-discharge processing method provided in an embodiment of the present invention. Please refer to... Figure 3 As shown, if the 48V battery is moderately discharged, the specific processing steps include:

[0049] Step S21: Start the engine with the 12V starter motor;

[0050] Step S22: EMS requests voltage mode idle speed;

[0051] Step S23: After the EMS request, the BSG enters voltage control mode to generate electricity;

[0052] Step S24: BSG charges the 48V battery, and DC-DC converter converts the 48V output from BSG to 12V to charge the 12V battery.

[0053] Step S25: Determine whether the 48V battery has switched to no power supply or slight power supply. If yes, proceed to the step of determining whether the 48V battery has switched to no power supply or slight power supply; otherwise, proceed to step S22.

[0054] In this embodiment of the invention, since the discharge capacity of the 48V battery is insufficient to support the starting of the BSG motor, only a 12V starter motor can be used to start the engine. The BSG integrated unit typically enters voltage mode with a specific speed requirement. In voltage mode, the host computer requests a higher minimum engine speed to stably maintain the BSG voltage mode. In BSG voltage mode, the BSG acts as a regulated power supply to power the 48V system. All functions that request torque from the BSG in the vehicle are unavailable, such as power steering, regenerative braking, brake regeneration, idle stability assist, and shift torque assist. The host computer requests a target voltage from the BSG that is slightly higher than the current 48V battery voltage (e.g., 1V). The 48V bus voltage is slightly higher than the 48V battery static voltage, thus achieving a small-rate trickle charging effect. The DC-DC converter controls the voltage at the 12V terminal, drawing power from the high-voltage side. Since the BSG is also in voltage control mode, the 12V power supply requirement and 48V charging are both met by the BSG integrated unit. When the 48V battery power is restored to a slightly depleted state (usually by referring to data values ​​such as SOC and SOP), the host computer requests the BSG to restore to the normal torque control mode, and the vehicle restores the BSG torque response function.

[0055] It is understandable that in this state, the 48V battery has a very weak discharge capacity and basically no ability to provide power to the BSG integrated unit to assist the vehicle and start the engine. However, in this state, no additional operation is required from the driver. The 48V battery can be slowly charged using this method, and it can recover from the moderate power depletion state on its own. Therefore, there is no need to remind the driver and increase the driver's confusion.

[0056] Specifically, after KL15 is powered on, the host computer is powered on. Once it is determined that the 12V battery voltage or SOC meets the 48V power-on requirement, it can operate according to the three timing schemes in Table 1. Each scheme is roughly divided into five steps.

[0057] Table 1 – Typical Power-On Sequence for a 48V Battery Under Moderate Discharge

[0058]

[0059] This invention proposes a battery power-off processing method for a vehicle's host computer. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The method first determines whether the 48V electrical system can be powered on, obtaining the battery power level of the 48V electrical system. If it is moderately power-off, the first starter motor starts the engine, raising the engine's minimum speed above a first preset value. The BSG integrated unit is then requested to enter voltage mode idling and charge the 48V electrical system battery until the battery power level is no power-off or slightly power-off. This method does not increase the cost of component hardware by orders of magnitude, has a high degree of universality, and wide applicability. It can effectively address situations where the 48V and 12V batteries are power-off, have severely limited charging and discharging power, or are damaged due to malfunctions. It effectively improves the stability of the vehicle's power supply system, reduces the risk of vehicle breakdowns due to power failure, and reduces after-sales claims costs caused by power failure. It can also be extended to most 48V system vehicles that have eliminated the 12V generator.

[0060] In some embodiments of the present invention, optionally, the 48V electrical system further includes a battery management system, and before determining whether to support powering on the 48V electrical system, the method further includes:

[0061] Determine whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty.

[0062] In some embodiments of the present invention, optionally, before determining whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty, the method further includes:

[0063] Determine whether the voltage of the 12V electrical system meets the 48V power-on requirement. If not, prompt the user to connect an external 12V voltage.

[0064] In some embodiments of the present invention, optionally, the method further includes:

[0065] If the 48V electrical system is not supported for power-on, the user will be prompted that there is a 48V electrical system fault.

[0066] Please refer to Figure 3 , Figure 3 This is a second schematic flowchart of a battery post-discharge processing method provided by an embodiment of the present invention, the method further comprising:

[0067] Step S31: Determine whether the 12V voltage meets the 48V power-on requirement.

[0068] Step 32: If yes, determine if there is a fault in the vehicle's BMS, BSG, or DC-DC converter; otherwise, the instrument panel will prompt the driver to connect an external 12V voltage.

[0069] Step 33: Determine if the 48V system is supported for power-on. If yes, power on the system; otherwise, the instrument panel will prompt the driver that the 48V electrical system is faulty.

[0070] Step 34: Proceed to the step of obtaining and processing the 48V battery's charge level.

[0071] In this embodiment of the invention, by setting the 48V electrical system, 12V electrical system, BSG integrated unit, and DC converter in the same system, it is possible to effectively address situations where the 48V and 12V batteries are depleted, their charging and discharging power is severely limited, or they are damaged due to malfunctions, without increasing the cost of additional components by orders of magnitude. This effectively improves the stability of the vehicle's power supply system, reduces the risk of vehicle breakdown due to power failure, and reduces after-sales claims costs caused by power failure. It can also be extended to most 48V system vehicles that have eliminated the 12V generator, demonstrating high versatility and wide applicability.

[0072] In some embodiments of the present invention, optionally, after notifying the user of a 48V electrical system fault, the method further includes:

[0073] The battery power level of the 48V electrical system is obtained. If it is severely depleted or the 48V battery is disconnected, the first starter motor is used to start the engine so that the minimum speed of the engine is higher than the second preset value. The DC converter is then requested to use the battery of the 12V electrical system for pre-charging so that the high voltage terminal of the DC converter is raised to the battery-free mode operating voltage of the BSG integrated machine. The DC converter is then requested to switch its operating state to buck mode.

[0074] For details, please refer to Figure 3 If the 48V battery is severely depleted or disconnected, the handling steps include:

[0075] Step S41: Start the engine with the 12V starter motor;

[0076] Step S42: After the EMS request, the BSG enters the battery-free control mode to generate electricity;

[0077] Step S43: The BSG charges the 48V battery, and the DC-DC converter converts the 48V output from the BSG to 12V to charge the 12V battery, thus ensuring 12V power supply.

[0078] In this embodiment of the invention, a severe 48V fault generally refers to a severe depletion or disconnection of the 48V battery. In this state, such a fault cannot be recovered automatically and must be handled by an authorized service station. The BMS controls the disconnection of the 48V battery relay, meaning the 48V battery no longer exists in the 48V electrical system, or its status cannot be obtained due to physical or communication reasons. Please refer to [the relevant documentation / reference needed] in this case. Figure 4 , Figure 4 This is the second structural diagram of an electrical system for a battery-powered post-processing method provided in this embodiment of the invention. The electrical system structure is shown in Figure 4. The 48V battery is not in the circuit, and the 48V power-on operation cannot be completed according to the conventional procedure. After the driver powers on the KL15, the 12V battery status is checked and it meets the 48V power-on requirement. However, at this time, the 48V system is not supported by the BMS feedback from the 48V battery, indicating a fault in the 48V system. After starting the engine using the 12V starter, the host computer requests a higher minimum engine speed to improve the stability of the engine itself and the BSG in battery-free mode. The host computer requests the DC-DC converter to pre-charge using the 12V battery energy, raising the high voltage to the BSG's battery-free mode operating voltage. Since the BSG and DC-DC high voltage terminals are on the same line, the BSG voltage is within the range that allows entry into battery-free mode, but is in a neutral state. At this time, the BSG is requested to enter battery-free mode, which is also a special voltage mode. Upon entering battery-free voltage mode, the host computer requests the DC-DC converter to switch from 48V to 12V buck mode. During this conversion, the 12V load is suddenly applied to the BSG after the DC-DC converter's conversion, which can easily cause instability in the BSG. A preferred strategy is for the host computer or DC-DC controller to limit the loading rate of the 12V load, ensuring a smooth loading process and preventing the BSG from becoming unstable. When the loading rate of the 12V DC-DC load is limited, the insufficient power demand is met by the 12V battery.

[0079] In some embodiments of the present invention, optionally, if the 48V electrical system further includes a 48V motor, the method further includes:

[0080] If the battery of the 48V electrical system is not powered or slightly powered, the 48V motor will start the engine, and the BSG integrated machine will be requested to enter the torque control mode until the battery of the 48V electrical system is restored.

[0081] For details, please refer to Figure 3 If the 48V battery is not fully discharged or only slightly discharged, the handling steps include:

[0082] Step S51: Start the engine with the 48V motor;

[0083] Step S52: EMS requests BSG to enter torque control mode for power generation;

[0084] Step S53: The 48V output from the BSG is converted to 12V by the DC-DC converter to charge the 12V battery, thus restoring power.

[0085] In this embodiment of the invention, this state is completely normal, but the driver can still start the engine by using the 48V motor through the KL15 in the vehicle according to the procedure, and request the BSG integrated machine to enter the torque control mode until the battery power of the 48V electrical system is restored.

[0086] In some embodiments of the present invention, optionally, if the battery of the 12V electrical system is not depleted or is only slightly depleted and the battery of the 48V electrical system is not depleted or is only slightly depleted, the method further includes: starting the engine so that the BSG integrated machine enters torque control mode to generate electricity.

[0087] In this embodiment of the invention, when the vehicle still has a 12V electrical system, the battery depletion level of the 48V electrical system further includes: 12V battery not severely depleted, and 12V battery severely depleted. At this time, for models equipped with both 12V and 48V systems and without a 12V generator, the battery depletion state can be divided into the following four categories: 1. 12V battery not severely depleted; 2. 12V severely depleted; 3. 48V battery slightly depleted; 4. 48V battery moderately depleted; 5. 48V battery severely depleted, and combinations of 1, 2, and 2-4.

[0088] If the 12V electrical system battery is not depleted or only slightly depleted, and the 48V electrical system battery is not depleted or only slightly depleted, this state is completely normal. Following the procedure, after the driver powers on the KL15 power supply in the vehicle, the host computer powers on and can operate according to the three timing schemes in Table 2 below. Each scheme roughly consists of five steps:

[0089] Table 2 – Typical Power-On Sequence of a 48V System

[0090]

[0091] During the BSG power generation phase, the BSG employs torque control mode to generate negative torque power as requested by the host computer. Part of this power is supplied to the 48V battery, while the other part is converted from 48V to 12V by a DC-DC converter to charge the 12V battery and provide power to the currently used 12V equipment. Slight depletion of the 12V battery is then restored.

[0092] When the 12V battery is severely depleted, after KL15 is powered on, the host computer detects the 12V battery voltage or SOC and determines that it cannot meet the energy requirements for DC-DC pre-charging. It will then prompt the driver to connect an external 12V power supply via the instrument panel to meet the vehicle's 48V power requirements. After the driver connects the external power supply, the system will continue to process the system as if the 12V battery is not depleted or is only slightly depleted. It is worth noting that among the three power-on sequences listed in Table 2, the first two have lower requirements for the 12V external power supply capacity, while the third has higher requirements because it requires the 12V external power supply to be able to start the engine.

[0093] Please refer to Figure 5 , Figure 5 This is one of the structural schematic diagrams of a battery discharge post-processing device provided in an embodiment of the present invention. The present invention also provides a battery discharge post-processing device 10, applied to a host computer of a vehicle. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The 12V electrical system includes a first starter motor. The BSG integrated unit is connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system is connected to the other end of the DC-DC converter. The device includes:

[0094] Module 11 is used to determine whether a 48V electrical system is supported for power-on.

[0095] Acquisition module 12 is used to acquire the battery power level of the 48V electrical system;

[0096] The execution module 13 is configured to, if the power supply is moderate, start the engine with the first starter so that the minimum speed of the engine is higher than a first preset value, and request the BSG integrated machine to enter the voltage mode idle speed and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply.

[0097] This invention proposes a battery power supply post-processing device for a vehicle's host computer. The vehicle includes an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system. The device first determines whether the 48V electrical system can be powered on, then obtains the battery power level of the 48V electrical system. If it is moderately power-depleted, the first starter motor starts the engine, raising the engine's minimum speed above a first preset value. The BSG integrated unit is then requested to enter voltage mode idling and charge the 48V electrical system battery until the battery power level is no power-depleted or slightly power-depleted. This device requires no increase in component hardware costs, has high versatility, and wide applicability. It can effectively address situations where the 48V and 12V batteries are power-depleted, charging / discharging power is severely limited, or they are damaged. It effectively improves the stability of the vehicle's power supply system, reduces the risk of vehicle breakdowns due to power failure, and reduces after-sales claims costs caused by power failure. It can also be extended to most 48V system vehicles that have eliminated the 12V generator.

[0098] In this embodiment of the invention, the above-mentioned functional modules are also used to execute the various processes in the corresponding method embodiments, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0099] This invention also provides a vehicle, including a host computer, which is used to execute the battery discharge post-processing method as described in any of the above embodiments.

[0100] The present invention also provides an electronic device, see below. Figure 6 , Figure 6 This is one of the structural schematic diagrams of an electronic device provided in an embodiment of the present invention; the electronic device 20 includes: a processor 21, a memory 22, and a program stored in the memory 22 and executable on the processor 21. When the program is executed by the processor 21, it implements various processes as described in any of the embodiments of the battery discharge post-processing method, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0101] This invention also provides a readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of any of the above-described embodiments of the battery post-discharge processing method and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0102] The computer-readable storage medium mentioned above includes, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0103] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method of post-processing a battery feed, characterized in that, A host computer applied to a vehicle, the vehicle including an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system, the 12V electrical system including a first starter motor, the BSG integrated unit connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system connected to the other end of the DC-DC converter, the method comprising: Determine if a 48V electrical system is supported for power-on. Obtain the battery power level of the 48V electrical system; If the power supply is moderate, the first starter motor will start the engine so that the minimum speed of the engine is higher than the first preset value. The BSG integrated machine will be requested to enter the voltage mode idling and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply. The method further includes: If the 48V electrical system is not supported for power-on, the user will be prompted that there is a 48V electrical system fault. After notifying the user of a 48V electrical system fault, the system also includes: The battery power level of the 48V electrical system is obtained. If it is severely depleted or the 48V battery is disconnected, the first starter motor is used to start the engine so that the minimum speed of the engine is higher than the second preset value. The DC converter is then requested to use the battery of the 12V electrical system for pre-charging so that the high voltage terminal of the DC converter is raised to the battery-free mode operating voltage of the BSG integrated machine. The DC converter is then requested to switch its operating state to buck mode.

2. The battery feed power post-processing method according to claim 1, characterized by, The 48V electrical system also includes a 48V motor, and the method further includes: If the battery of the 48V electrical system is not powered or slightly powered, the 48V motor will start the engine, and the BSG integrated machine will be requested to enter the torque control mode until the battery of the 48V electrical system is restored.

3. The battery feed power post-processing method according to claim 1, characterized by, The 48V electrical system also includes a battery management system. Before determining whether the 48V electrical system is supported for power-on, the following steps are also included: Determine whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty.

4. The battery post-discharge treatment method according to claim 3, characterized in that, Before determining whether at least one of the battery management system, the BSG integrated unit, and the DC-DC converter is faulty, the method further includes: Determine whether the voltage of the 12V electrical system meets the 48V power-on requirement. If not, prompt the user to connect an external 12V voltage.

5. The battery post-discharge treatment method according to any one of claims 1-4, characterized in that, If the battery of the 12V electrical system is not depleted or is only slightly depleted, and the battery of the 48V electrical system is not depleted or is only slightly depleted, the method further includes: Starting the engine causes the BSG integrated unit to enter torque control mode to generate electricity.

6. A battery post-feeding treatment device, characterized in that, The device is used to perform the method according to any one of claims 1-5, and is applied to a host computer of a vehicle, the vehicle including an engine, a BSG integrated unit, a 48V electrical system, a DC-DC converter, and a 12V electrical system, the 12V electrical system including a first starter motor, the BSG integrated unit being connected in parallel with the 48V electrical system at one end of the DC-DC converter, and the 12V electrical system being connected to the other end of the DC-DC converter, the device comprising: The judgment module is used to determine whether a 48V electrical system is supported for power-on. The acquisition module is used to acquire the battery power level of the 48V electrical system; The execution module is configured to, if the power supply is moderate, start the engine with the first starter motor so that the minimum speed of the engine is higher than a first preset value, and request the BSG integrated machine to enter the voltage mode idle speed and charge the battery of the 48V electrical system until the battery supply level of the 48V electrical system is no power supply or slightly power supply.

7. An electronic device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the steps in the battery post-discharge processing method as described in any one of claims 1 to 5.

8. A readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the battery post-discharge processing method as described in any one of claims 1 to 5.

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