Charging management method for in-vehicle wireless terminal controller built-in backup battery

Abstract

This application provides a charging management method, device, vehicle, and storage medium for a vehicle-mounted wireless terminal controller with a built-in backup battery, belonging to the field of battery charging management technology. It includes: periodically acquiring the real-time temperature and current charge level of the backup battery; determining a charging mode and a target voltage matching the charging mode based on the real-time temperature and current charge level; initiating charging of the backup battery when the charging mode is a first charging mode or a second charging mode; during charging, outputting PID control parameters corresponding to the current sampling period based on the voltage difference between the real-time voltage and the target voltage and the rate of change of the voltage difference; dynamically adjusting the charging current of the backup battery based on the PID control parameters; and executing a post-full charge processing strategy corresponding to the charging mode when the current charge level of the backup battery is detected to have reached the target voltage. This can extend the backup battery life, improve charging efficiency, and ensure emergency power supply.

Description

Technical Field

[0001] This application relates to the field of battery charging management technology, specifically to a charging management method, device, vehicle, and storage medium for a vehicle-mounted wireless terminal controller with a built-in backup battery. Background Technology

[0002] As a core control unit for vehicle connectivity, the in-vehicle wireless terminal (T-BOX) provides functions such as network access, remote control, and emergency calls. To ensure normal operation of the terminal in emergency situations such as vehicle power failure, some in-vehicle terminals have built-in backup batteries. These backup batteries maintain terminal operation when the vehicle's power supply fails, ensuring the realization of critical functions such as emergency rescue.

[0003] Currently, vehicle-mounted terminals primarily rely on the vehicle's battery for power. If the battery fails or the power supply line malfunctions, the terminal will immediately lose power, preventing emergency call functions from being triggered and hindering the rescue center's ability to obtain vehicle location and on-site data in a timely manner. A few terminals with built-in backup batteries employ a fixed constant-current charging method. However, this method fails to consider the battery's characteristics under different temperatures and environments, making it difficult to balance charging efficiency with battery lifespan. High-current charging, while quickly replenishing power, accelerates battery aging; low-current charging, while protecting the battery, cannot provide sufficient power in emergencies, severely impacting the availability and reliability of the backup battery. Summary of the Invention

[0004] The purpose of this application is to provide a charging management method, device, vehicle, and storage medium for a vehicle-mounted wireless terminal controller with a built-in backup battery. It aims to solve the problems in the prior art where the use of a fixed constant current charging method for backup batteries makes it difficult to balance charging efficiency and battery life, and the inability to adaptively adjust the charging strategy under different temperature environments, thus affecting the availability of backup batteries in emergency situations.

[0005] To achieve the above objectives, the first aspect of this application provides a charging management method for a vehicle-mounted wireless terminal controller with a built-in backup battery, the method comprising:

[0006] Periodically acquire the real-time temperature and current charge level of the backup battery; The charging mode for the backup battery and the target voltage that matches the charging mode are determined based on the real-time temperature and current battery level. When the charging mode is either the first charging mode or the second charging mode, start charging the backup battery; During the charging process, based on the voltage difference between the real-time voltage and the target voltage and the rate of change of the voltage difference in the current sampling period, the PID control parameters corresponding to the current sampling period are output. The charging current for the backup battery is dynamically adjusted based on the PID control parameters. If the current charge level of the backup battery is detected to have reached the target voltage, the post-full charge processing strategy corresponding to the charging mode is executed.

[0007] In this embodiment of the application, the charging time is recorded at the start of charging, and the post-full charge processing strategy includes: when the charging mode is the first charging mode and the charging time has not reached the preset time threshold, the current charging mode is switched to trickle charging mode, and the battery power is maintained with a preset small current until the charging time reaches the preset time threshold.

[0008] In this embodiment of the application, the post-full charge processing strategy further includes: ending the current charging if the charging mode is the second charging mode and / or the charging time reaches a preset time threshold.

[0009] In this embodiment of the application, before switching to trickle charging mode, the charging management method further includes: controlling the backup battery to discharge for a preset fixed duration with a preset discharge current; obtaining the voltage change value before and after discharge, and calculating the current internal resistance of the backup battery based on the ratio of the voltage change value to the discharge current; ending the current charging if the current internal resistance is greater than a preset internal resistance threshold; and entering trickle charging mode if the current internal resistance is less than or equal to the preset internal resistance threshold.

[0010] In this embodiment of the application, determining the charging mode for the backup battery and the target voltage matching the charging mode based on the real-time temperature and the current power level includes: determining the charging mode as a first charging mode when the real-time temperature is in a first temperature range, and determining a first target voltage corresponding to the first charging mode; determining the charging mode as a second charging mode when the real-time temperature is in a second temperature range, and determining a second target voltage corresponding to the second charging mode, wherein the second target voltage is lower than the first target voltage.

[0011] In this embodiment of the application, the charging management method further includes: pausing charging and waiting for a preset recovery time before detecting the real-time temperature again when the real-time temperature is not in the first temperature range or the second temperature range.

[0012] In this embodiment of the application, the charging management method further includes: before periodically acquiring the real-time temperature and current charge of the backup battery, detecting the vehicle's operating status, and entering the charging mode if the operating status meets preset charging trigger conditions; the operating status includes at least the vehicle's ignition status and main power supply voltage status; the charging trigger conditions include at least the ignition signal being valid and the vehicle's power supply voltage being higher than a preset voltage threshold.

[0013] A second aspect of this application provides a charging management device for a vehicle-mounted wireless terminal controller with a built-in backup battery, comprising: a memory configured to store instructions; and a processor configured to retrieve instructions from the memory and, when executing the instructions, to implement any of the aforementioned charging management methods for the vehicle-mounted wireless terminal controller with a built-in backup battery.

[0014] A third aspect of this application provides a vehicle, including: an onboard wireless terminal controller; a backup battery; and a charging management device for the backup battery built into the onboard wireless terminal controller.

[0015] A fourth aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the charging management method for a built-in backup battery of an in-vehicle wireless terminal controller as described above.

[0016] This application proposes a charging management method for a vehicle-mounted wireless terminal controller with a built-in backup battery. By dynamically selecting the charging mode based on the battery's real-time temperature and charge level, and adaptively adjusting the charging current using a fuzzy PID control algorithm, while setting differentiated full-charge voltage thresholds and post-processing strategies for different temperature ranges, the method improves charging efficiency while extending battery life, ensuring that the backup battery has sufficient charge in emergencies to reliably perform rescue functions.

[0017] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1 The schematic diagram illustrates a charging management method for a built-in backup battery in an in-vehicle wireless terminal controller according to an embodiment of this application. Figure 2 A schematic diagram of a fuzzy PID controller structure according to an embodiment of this application is shown. Figure 3 A schematic diagram illustrating a charging strategy according to an embodiment of this application is shown. Figure 4 The diagram illustrates the internal structure of a computer device according to an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] Figure 1 This illustration schematically shows a flowchart of a charging management method for a built-in backup battery in a vehicle-mounted wireless terminal controller according to an embodiment of this application. Figure 1 As shown in one embodiment of this application, a charging management method for a built-in backup battery in a vehicle-mounted wireless terminal controller is provided, including the following steps: Step 101: Periodically acquire the real-time temperature and current charge of the backup battery.

[0021] Specifically, after power-on, the vehicle-mounted wireless terminal controller periodically collects the real-time temperature of the backup battery at a preset first time interval. Temperature acquisition is achieved through a temperature sensor placed near the battery. The controller reads the voltage value output by the sensor through an analog-to-digital converter interface and converts it into the current temperature value based on the temperature characteristics of the thermistor. Simultaneously, the controller periodically collects the real-time voltage of the backup battery at a preset second time interval. Voltage acquisition is achieved through a battery voltage detection circuit. The controller reads the voltage value across the backup battery terminals and converts the current voltage value into the corresponding current charge value according to a pre-calibrated voltage-charge correspondence. This charge value is used to characterize the current remaining capacity of the backup battery, providing a basis for subsequent charging mode selection and charging control. This step, by setting separate temperature and voltage acquisition cycles, ensures both real-time temperature monitoring and meets the high-frequency requirements of voltage sampling, reducing system power consumption and computational burden while ensuring control accuracy.

[0022] Step 102: Determine the charging mode for the backup battery and the target voltage that matches the charging mode based on the real-time temperature and current battery level.

[0023] Specifically, after acquiring the real-time temperature and current charge level of the backup battery, the controller first determines the temperature range. Based on the battery's physical characteristics, its charge acceptance and safety margins differ at different temperatures, thus requiring differentiated charging strategies. This step divides the charging mode according to the real-time temperature and sets corresponding target voltage thresholds, adapting the charging strategy to the battery's physical characteristics at different temperatures, avoiding the risk of overcharging at low temperatures, and improving charging safety.

[0024] In one embodiment, determining a charging mode for the backup battery and a target voltage matching the charging mode based on real-time temperature and current battery level includes: determining a first charging mode when the real-time temperature is in a first temperature range, and determining a first target voltage corresponding to the first charging mode; and determining a second charging mode when the real-time temperature is in a second temperature range, and determining a second target voltage corresponding to the second charging mode, wherein the second target voltage is lower than the first target voltage.

[0025] The controller is pre-set with a first temperature range and a second temperature range, where the first temperature range corresponds to a normal temperature scenario and the second temperature range corresponds to a low temperature scenario. If the real-time temperature is detected to be within the first temperature range, the current scenario is determined to be a normal temperature charging scenario, and the charging mode is set to the first charging mode, i.e., normal temperature charging mode. A first target voltage corresponding to normal temperature charging is also set. This target voltage is the voltage threshold when the battery is fully charged at normal temperature, used for subsequent full-charge determination. If the real-time temperature is detected to be within the second temperature range, the current scenario is determined to be a low-temperature charging scenario, and the charging mode is set to the second charging mode, i.e., low-temperature charging mode. A second target voltage corresponding to low-temperature charging is also set. Because battery activity decreases in low-temperature environments, excessively high charging voltages may lead to safety issues such as lithium plating. Therefore, the second target voltage is lower than the first target voltage to ensure the safety of low-temperature charging. This embodiment clearly distinguishes between normal temperature mode and low-temperature mode, and dynamically adjusts the target voltage according to the temperature range, realizing differentiated full-charge determination criteria and effectively extending the battery's lifespan in low-temperature environments.

[0026] In one embodiment, the charging management method further includes: pausing charging and waiting for a preset recovery time before detecting the real-time temperature again when the real-time temperature is not in the first temperature range or the second temperature range.

[0027] If the detected real-time temperature is neither in the first temperature range nor the second temperature range, it indicates that the battery is in an extreme temperature environment, and charging at this time may cause irreversible damage to the battery. The controller will pause the charging operation, enter a waiting state, and start a timer. After the preset recovery time has elapsed, the real-time temperature will be detected again until the temperature returns to the allowable charging temperature range before the subsequent charging process can continue. This mechanism can effectively protect the battery from charging damage at extreme temperatures and extend battery life. This embodiment clearly demonstrates that pausing charging and waiting for the temperature to recover under extreme temperature conditions can prevent irreversible damage to the battery caused by charging in an unsafe operating area, further strengthening the battery protection mechanism.

[0028] Step 103: If the charging mode is either the first charging mode or the second charging mode, start charging the backup battery.

[0029] Specifically, after determining the charging mode and setting the corresponding target voltage, the controller initiates the charging process. Based on the current charging mode, the controller calls upon the appropriate control parameters and charges the backup battery through the charging management circuit.

[0030] Step 104: During the charging process, output PID control parameters corresponding to the current sampling period based on the voltage difference between the real-time voltage and the target voltage and the rate of change of the voltage difference under the current sampling period.

[0031] Specifically, such as Figure 2 As shown, in each voltage sampling cycle, the controller calculates the difference between the target voltage and the actual voltage to obtain the voltage deviation. Simultaneously, the change in this deviation value relative to the previous sampling period is calculated, and divided by the sampling time interval to obtain the deviation change rate. These two parameters reflect the degree to which the battery voltage deviates from the target value and the trend of voltage change. The controller will , The real-time temperature is used as the input to the fuzzy inference unit. The fuzzy inference unit infers the appropriate PID control parameters (proportional coefficient Kp, integral coefficient Ki, and derivative coefficient Kd) based on a preset fuzzy rule table. This fuzzy rule table is obtained through experimental calibration based on the battery's characteristics at different temperatures and charging stages. Different temperature ranges correspond to different rule tables; for example, different parameter mapping relationships are used for the normal temperature range and the low temperature range. This step introduces a fuzzy PID control algorithm to dynamically adjust the PID parameters based on voltage deviation, deviation change rate, and real-time temperature. This allows the charging current to follow the battery's state changes in real time, achieving refined and adaptive adjustment, effectively avoiding the problem of poor control performance of traditional fixed-parameter PID controllers when operating conditions change.

[0032] In one embodiment, when the real-time temperature is within the normal temperature range and When the values ​​are large, the corresponding rules in the fuzzy rule table can be set as follows: Kp takes a large value, Ki takes a moderate value, and Kd takes a small value, in order to achieve fast charging; when the real-time temperature is in the low-temperature range, even If the value of Kp is too large, the rule table will also limit the value of Kp to avoid battery damage caused by low-temperature high-current charging.

[0033] In one embodiment, the fuzzy inference unit performs an inference calculation once in each sampling period to ensure that the output Kp, Ki, and Kd can follow the changes in battery state in real time. The three parameters obtained from the inference are used for subsequent PID control calculations, and substituted into the positional PID formula to calculate the charging current control quantity for the current sampling period.

[0034] Step 105: Dynamically adjust the charging current for the backup battery based on the PID control parameters.

[0035] Specifically, after the fuzzy inference unit outputs the PID control parameters Kp, Ki, and Kd for the current sampling period, the controller substitutes these parameters into the positional PID formula to calculate the charging current control quantity U(t) at the current moment. This formula is expressed as:

[0036] in, Voltage deviation for the current sampling period , This represents the voltage deviation from the previous sampling period. This is the cumulative sum of voltage deviations from the start of this charging cycle to the current moment. Calculated by the controller. This is the setpoint for the charging current to be output during the current sampling period, measured in amperes. This setpoint is sent to the charging management circuit via digital-to-analog conversion or pulse-width modulation, and the charging management circuit adjusts the actual charging current based on this setpoint.

[0037] In one embodiment, when the battery voltage is low, When it is large, the proportional term It dominates, outputting a larger charging current setting to achieve fast charging. As the battery voltage gradually increases... As the proportional term gradually decreases, the contribution of the integral and differential terms increases relatively, resulting in a smooth decrease in charging current and preventing voltage overshoot.

[0038] In one embodiment, when the battery is close to full charge, As it approaches zero, the integral term The differential term is used to eliminate minor steady-state errors and ensure that the battery voltage can accurately reach the target value; the differential term is adjusted in advance according to the voltage change trend to prevent abnormal voltage fluctuations caused by load fluctuations or other disturbances.

[0039] It should be noted that the controller repeats the above calculation in each voltage sampling cycle, updating the charging current setpoint in real time. The charging management circuit dynamically adjusts the output current based on the received setpoint, ensuring that the actual charging current always follows the controller's calculation results. During charging, if the real-time temperature exceeds the safe operating range, the vehicle is turned off, or the charging time reaches the preset upper limit, the controller will forcibly terminate charging, regardless of the current setpoint calculated by the PID controller. If charging is paused due to temperature exceeding the limit, the controller will restart the charging process and begin PID calculation again once the temperature returns to the allowable range.

[0040] This step calculates the charging current in real time by substituting the PID parameters obtained from fuzzy inference into the positional PID formula, achieving dynamic and continuous adjustment of the charging current. A larger current is provided in the early stages of charging to improve charging efficiency, while the current is smoothly reduced as the battery approaches full charge to prevent overshoot. Simultaneously, the integral term eliminates steady-state errors to ensure accurate voltage delivery, and the derivative term is adjusted in advance based on the changing trend to suppress fluctuations, thereby effectively extending battery life while ensuring charging speed.

[0041] Step 106: If the current charge level of the backup battery is detected to have reached the target voltage, execute the post-full charge processing strategy corresponding to the charging mode.

[0042] Specifically, the controller compares the real-time voltage with the target voltage corresponding to the current charging mode in each voltage sampling cycle. When the real-time voltage reaches the target voltage, it indicates that the battery is basically fully charged. The controller then executes a differentiated post-charge processing strategy based on the current charging mode. This step, by implementing a differentiated post-charge processing strategy based on the charging mode, maintains the charge with a small current at room temperature to prevent self-discharge loss, and directly terminates charging at low temperatures to avoid overcharging risks. This achieves refined management of the fully charged state and further extends battery life.

[0043] In one embodiment, the charging time is recorded at the start of charging, and the post-charging processing strategy includes: if the charging mode is the first charging mode and the charging time has not reached the preset time threshold, the current charging mode is switched to trickle charging mode to maintain the battery power with a preset small current until the charging time reaches the preset time threshold.

[0044] The controller starts a timer at the beginning of charging to record the duration of the current charge. When the charging mode is the first charging mode and the real-time voltage reaches the first target voltage, the controller first determines whether the current charging time has reached a preset time threshold. If the charging time has not yet reached the preset time threshold, the controller switches the current charging mode to trickle charging mode. In trickle charging mode, the controller outputs a preset small current to maintain the battery charge and compensate for the battery's self-discharge loss. The controller continues to charge in trickle mode until the charging time reaches the preset time threshold, and then ends the current charging. This embodiment combines charging time determination with switching to trickle charging mode to maintain charge after full charge at room temperature, while setting a time limit to prevent unlimited floating charging, thus balancing charge maintenance and safety protection.

[0045] In one embodiment, before switching to trickle charging mode, the charging management method further includes: controlling the backup battery to discharge for a preset fixed duration with a preset discharge current; obtaining the voltage change value before and after discharge, and calculating the current internal resistance of the backup battery based on the ratio of the voltage change value to the discharge current; ending the current charging if the current internal resistance is greater than a preset internal resistance threshold; and entering trickle charging mode if the current internal resistance is less than or equal to the preset internal resistance threshold.

[0046] Specifically, the controller controls the backup battery to discharge for a fixed duration at a preset discharge current. The open-circuit voltage is collected before discharge begins, and the closed-circuit voltage is collected at the end of discharge. The difference between the two is calculated to obtain the voltage change. According to Ohm's law, the voltage change is divided by the discharge current to obtain the current internal resistance of the backup battery. To improve measurement accuracy, multiple voltage samples can be taken shortly before the end of discharge, and the average value after removing the maximum and minimum values ​​is taken as the closed-circuit voltage. The controller compares the calculated current internal resistance with a preset internal resistance threshold: if the current internal resistance is greater than the threshold, it indicates that the battery is severely aged, and continued charging may pose a safety risk. The controller will directly end the charging and generate an alarm command to prompt battery replacement. If the current internal resistance is less than or equal to the threshold, it indicates that the battery is in normal condition, and the controller allows entry into trickle charging mode. It should be noted that during trickle charging, the controller continuously monitors the real-time temperature of the backup battery and the vehicle status. If the temperature exceeds the safe operating range, the controller pauses charging and waits for the temperature to recover; if a vehicle shutdown signal is detected, the controller immediately ends the charging to prevent the vehicle from continuing to consume power after it goes into sleep mode. This embodiment detects the battery's internal resistance before entering trickle charging mode, assesses the battery's aging level based on the internal resistance, and only allows batteries in normal condition to enter trickle charging, thus avoiding the risk of thermal runaway caused by long-term float charging of aged batteries in trickle charging mode and improving charging safety.

[0047] In one embodiment, the post-full charge processing strategy further includes: ending the current charging if the charging mode is the second charging mode and / or the charging time reaches a preset time threshold.

[0048] When the charging mode is the second charging mode and the real-time voltage reaches the second target voltage, the controller directly terminates the current charging without entering trickle mode because prolonged float charging is not advisable in low-temperature environments. Similarly, regardless of the charging mode, if the charging time reaches a preset time threshold before reaching the target voltage, the controller also directly terminates the current charging to prevent overcharging due to malfunctions. This embodiment directly terminates charging in low-temperature modes and overcharging situations, which aligns with the physical characteristic that prolonged charging is not advisable at low temperatures. It also provides a fallback protection mechanism for abnormal operating conditions, ensuring that the charging process always operates within safe boundaries.

[0049] In one embodiment, the charging management method further includes: detecting the vehicle's operating status before periodically acquiring the real-time temperature and current charge of the backup battery; and entering a charging mode if the operating status meets preset charging trigger conditions; the operating status includes at least the vehicle's ignition status and main power supply voltage status; and the charging trigger conditions include at least a valid ignition signal and the vehicle's power supply voltage being higher than a preset voltage threshold.

[0050] Specifically, before the onboard wireless terminal controller executes the charging management process, it first needs to determine the vehicle's current operating status to ensure that the charging operation is carried out under safe and reasonable conditions. The controller acquires the vehicle's ignition status in real time via the CAN bus or hard-wired signals. Ignition status typically includes signals such as ACC ON and IGN ON. When a valid ignition signal is detected, it indicates that the vehicle has started or is in driving mode, the alternator is working normally, and the vehicle's power supply is sufficient, providing the basic conditions for charging the backup battery. Simultaneously, the controller monitors the voltage status of the vehicle's power supply. The vehicle's power supply is the vehicle's main battery, typically a 12V or 24V system. The controller reads the vehicle's power supply voltage value in real time through a voltage sampling circuit and compares it with a preset voltage threshold. If the vehicle's power supply voltage is higher than this threshold, it indicates that the main power supply has sufficient charge to charge the backup battery without affecting the vehicle's normal starting and driving. When both conditions are met simultaneously—that is, the ignition signal is valid and the vehicle's power supply voltage is higher than the preset voltage threshold—the controller determines that the current operating status meets the charging trigger conditions and allows the subsequent charging process to begin. Subsequently, the controller begins periodically acquiring the real-time temperature and current charge level of the backup battery, and executes step 101 and subsequent charging control operations. If the ignition signal is invalid or the vehicle power supply voltage is lower than a preset threshold, the controller determines that the charging conditions are not met and will prohibit entering the charging mode to avoid consuming battery energy when the vehicle is in sleep mode or the main power supply is low, ensuring that the vehicle can start normally.

[0051] In one embodiment, when the controller detects that the charging conditions are not met, it does not immediately exit, but continuously monitors the vehicle's operating status at certain intervals until the conditions are met before entering the charging mode.

[0052] In one embodiment, if the vehicle is off but an emergency call is in progress, the controller may temporarily allow the vehicle to enter charging mode to ensure the power requirements of the emergency communication function.

[0053] Figure 1 This is a flowchart illustrating a charging management method for a built-in backup battery in an onboard wireless terminal controller, as shown in one embodiment. It should be understood that, although... Figure 1The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise explicitly stated herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0054] In one embodiment, Figure 3A schematic diagram illustrating a charging strategy according to an embodiment of this application is provided. As shown, the controller first monitors the vehicle's ignition status. Upon detection of vehicle ignition, it periodically checks the real-time temperature of the backup battery at a preset cycle Twait1. It determines whether the current temperature is within the battery's allowable operating temperature range Temp1. If the temperature exceeds Temp1, the controller remains in a waiting state and continues to monitor the temperature at the Twait1 cycle until the temperature returns to the allowable range. When the temperature meets the Temp1 condition, the controller further determines the current temperature range based on the real-time temperature's position. If the real-time temperature is higher than the preset temperature switching point Temp2, it is determined to be a normal temperature scenario; if the real-time temperature is lower than Temp2, it is determined to be a low temperature scenario. For the normal temperature scenario, the controller detects the current voltage of the backup battery. If the voltage is lower than the normal temperature full-charge voltage threshold V1, it initiates a normal temperature charging mode. In this mode, the controller uses a fuzzy PID algorithm to dynamically adjust the charging current and simultaneously starts a timer t to record the charging duration. During charging, the battery temperature is continuously monitored. If the temperature exceeds Temp1, charging is paused and a waiting timer Twait2 is started. Charging resumes after the temperature recovers, and the timer is accumulated. When the battery voltage reaches V1, the system switches to a normal temperature trickle charging mode, maintaining the charge with a preset small current. Before entering trickle charging mode, the controller performs an internal resistance check to determine whether to allow trickle charging or terminate charging directly based on the result. In low-temperature scenarios, the controller checks the current voltage of the backup battery. If the voltage is lower than the low-temperature full-charge voltage threshold V2, a low-temperature charging mode is activated. In this mode, another set of fuzzy PID parameters suitable for low temperatures is used for charging, and a timer t is started and the temperature is continuously monitored. Since prolonged float charging is not advisable in low-temperature environments, the controller terminates the current charging session directly when the battery voltage reaches V2, without entering trickle charging mode. During charging, if the timer t reaches the preset single-charge time limit, or if a vehicle shutdown signal is detected, the controller immediately terminates charging, regardless of whether the current voltage has reached the target threshold. If charging is paused due to abnormal temperature, charging resumes and the timer is accumulated after the temperature recovers, ensuring that the total charging time for a single session does not exceed the time limit. The charging strategy block diagram provided in this embodiment achieves intelligent control of the entire process of backup battery charging through temperature zoning judgment, fuzzy PID dynamic adjustment, multiple protection mechanisms, and differentiated post-full charge processing. It balances charging efficiency and battery life while ensuring charging safety, effectively solving the problems of single charging strategy, inability to adapt to temperature changes, and easy damage to batteries in the prior art.

[0055] In one embodiment, a charging management device (not shown) for a built-in backup battery in a vehicle-mounted wireless terminal controller is provided, comprising: The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement any of the aforementioned charging management methods for the built-in backup battery of the vehicle-mounted wireless terminal controller.

[0056] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters enables the charging management of the vehicle-mounted wireless terminal controller's built-in backup battery.

[0057] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0058] This application provides a vehicle, including: an on-board wireless terminal controller; a backup battery; and a charging management device for the backup battery built into the on-board wireless terminal controller.

[0059] This application provides a storage medium storing a program that, when executed by a processor, implements the above-described charging management method for the built-in backup battery of the vehicle-mounted wireless terminal controller.

[0060] This application provides a processor for running a program, wherein the program executes the charging management method for the built-in backup battery of the vehicle-mounted wireless terminal controller.

[0061] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor A01, a network interface A02, memory (not shown), and a database (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A04. The network interface A02 is used for communication with external terminals via a network connection. When executed by the processor A01, the computer program B02 implements a charging management method for the built-in backup battery of the vehicle-mounted wireless terminal controller.

[0062] Those skilled in the art will understand that Figure 4The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0063] This application provides a computer (electronic) device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the charging management method for the built-in backup battery of any of the above-mentioned vehicle-mounted wireless terminal controllers.

[0064] This application also provides a computer program product that, when executed on a data processing device, is adapted to perform the steps of a method for initializing the charging management of a built-in backup battery of an in-vehicle wireless terminal controller.

[0065] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0067] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0068] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0069] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0070] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0071] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0072] It should also be noted that 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 process, method, article, or apparatus.

[0073] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A charging management method for a vehicle-mounted wireless terminal controller with a built-in backup battery, characterized in that, The charging management method includes: The real-time temperature and current charge level of the backup battery are periodically acquired; The charging mode for the backup battery and the target voltage matching the charging mode are determined based on the real-time temperature and the current battery level. When the charging mode is either the first charging mode or the second charging mode, charging of the backup battery begins. During the charging process, based on the voltage difference between the real-time voltage and the target voltage and the rate of change of the voltage difference in the current sampling period, PID control parameters corresponding to the current sampling period are output. The charging current for the backup battery is dynamically adjusted according to the PID control parameters. If the current charge level of the backup battery is detected to have reached the target voltage, a post-full charge processing strategy corresponding to the charging mode is executed.

2. The charging management method according to claim 1, characterized in that, The charging duration is recorded at the start of charging, and the post-full charge processing strategy includes: When the charging mode is the first charging mode and the charging time has not reached the preset time threshold, the current charging mode is switched to trickle charging mode to maintain the battery power with a preset small current until the charging time reaches the preset time threshold.

3. The charging management method according to claim 2, characterized in that, The post-full charge processing strategy also includes: The charging process ends when the charging mode is the second charging mode and / or the charging time reaches a preset time threshold.

4. The charging management method according to claim 2, characterized in that, Before switching to trickle charging mode, the charging management method further includes: Control the backup battery to discharge for a preset fixed duration at a preset discharge current; Obtain the voltage change value before and after discharge, and calculate the current internal resistance of the backup battery based on the ratio of the voltage change value to the discharge current; If the current internal resistance is greater than a preset internal resistance threshold, the current charging process ends. When the current internal resistance is less than or equal to the preset internal resistance threshold, the system enters trickle charging mode.

5. The charging management method according to claim 1, characterized in that, The step of determining the charging mode for the backup battery and the target voltage matching the charging mode based on the real-time temperature and the current battery level includes: Under the condition that the real-time temperature is within the first temperature range, the charging mode is determined to be the first charging mode, and the first target voltage corresponding to the first charging mode is determined. When the real-time temperature is within the second temperature range, the charging mode is determined to be the second charging mode, and a second target voltage corresponding to the second charging mode is determined, wherein the second target voltage is lower than the first target voltage.

6. The charging management method according to claim 5, characterized in that, The charging management method further includes: If the real-time temperature is not in the first temperature range or the second temperature range, charging is paused and the real-time temperature is detected again after a preset recovery time.

7. The charging management method according to claim 1, characterized in that, The charging management method further includes: Before periodically acquiring the real-time temperature and current charge of the backup battery, the vehicle's operating status is detected. If the operating status meets the preset charging trigger conditions, the vehicle enters the charging mode. The operating status includes at least the vehicle's ignition status and main power supply voltage status. The charging trigger conditions include at least a valid ignition signal and a vehicle power supply voltage higher than a preset voltage threshold.

8. A charging management device for a vehicle-mounted wireless terminal controller with a built-in backup battery, characterized in that, include: The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the charging management method for the built-in backup battery of the vehicle-mounted wireless terminal controller according to any one of claims 1 to 7.

9. A vehicle, characterized in that, include: Vehicle-mounted wireless terminal controller; Backup battery; as well as The charging management device for the built-in backup battery of the vehicle-mounted wireless terminal controller according to claim 8.

10. A machine-readable storage medium storing instructions thereon, characterized in that, When executed by the processor, the instruction causes the processor to be configured to perform the charging management method for the built-in backup battery of the vehicle wireless terminal controller according to any one of claims 1 to 7.

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