Charging control methods, devices, chargers, and electric mobility scooters

Abstract

This invention discloses a charging control method, device, charger, and electric mobility scooter. The method includes: configuring the maximum current value of the target battery when the charger is electrically connected to the target battery; acquiring the current temperature value of the charger; determining the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold; determining the target charging current value based on the battery's maximum current value, the ideal charging current value, and a preset maximum charging current value; and performing closed-loop control of the charging current output by the charger based on the target charging current value. This invention enables the charger to continuously output a maximum current based on the highest operating temperature while ensuring charging safety, thereby shortening the charging time.

Description

Technical Field

[0001] This invention relates to the field of battery charging technology, and in particular to a charging control method, device, charger, and electric mobility scooter. Background Technology

[0002] As the core power source for electric vehicles, especially electric mobility scooters, battery charging efficiency has become a key bottleneck restricting the industry's technological development. In existing technical solutions, to ensure charging safety, charging equipment used in the manufacturing of batteries and other power transmission and distribution and control equipment, such as ground-based and underground AC charging piles, generally adopts a relatively conservative temperature control strategy. For example, when the charger temperature reaches a preset fixed threshold, a stepped power derating process is directly implemented. While this ensures charging safety, it leads to insufficient power utilization, resulting in significantly extended charging time and severely impacting the user experience. Furthermore, existing chargers often operate with a fixed maximum output current value, failing to fully consider the dynamic changes in real-time heat dissipation conditions. In high-temperature environments, this easily triggers temperature control protection mechanisms, preventing the equipment from achieving optimal dynamic adaptation under complex and changing environmental conditions. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a charging control method, device, charger, and electric mobility scooter, which enables the charger to continuously output a maximum current based on the highest operating temperature while ensuring charging safety, thereby shortening the charging time.

[0004] In a first aspect, embodiments of the present invention provide a charging control method, comprising: When the charger is electrically connected to the target battery, configure the maximum current value of the target battery. Obtain the current temperature value of the charger; Based on the current temperature value and the preset maximum operating temperature threshold, determine the current ideal charging current value; The target charging current value is determined based on the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. The charging current output by the charger is controlled in a closed loop based on the target charging current value.

[0005] According to some embodiments of the present invention, determining the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold includes: Based on the fuzzy logic control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold. Alternatively, based on a model predictive control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold. Alternatively, based on a switch control strategy, the current ideal charging current value can be determined according to the current temperature value and the preset maximum operating temperature threshold.

[0006] According to some embodiments of the present invention, the fuzzy logic-based control strategy, which determines the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold, includes: The temperature deviation value is determined based on the current temperature value and the preset maximum operating temperature threshold. The current adjustment value is determined based on the temperature deviation value and the preset temperature deviation range; The current ideal charging current value is determined based on the current target charging current value and the current adjustment value.

[0007] According to some embodiments of the present invention, the model-based predictive control strategy, which determines the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold, includes: Based on a preset temperature prediction model, the predicted temperature value for future times is determined according to the current temperature value and the current charging current value. The current ideal charging current value is determined based on the predicted temperature value and the preset maximum operating temperature threshold.

[0008] According to some embodiments of the present invention, determining the current ideal charging current value based on the switch control strategy, according to the current temperature value and a preset maximum operating temperature threshold, includes: Based on the preset maximum operating temperature threshold, determine the multi-level temperature threshold; The current adjustment value is determined based on the current temperature value and the multi-level temperature threshold. The current ideal charging current value is determined based on the current target charging current value and the current adjustment value.

[0009] According to some embodiments of the present invention, obtaining the current temperature value of the charger includes: Based on the current operating conditions, obtain the temperature value of the target temperature measuring point inside the charger, and determine the temperature value of the target temperature measuring point as the current temperature value; Alternatively, the temperature values ​​of multiple target temperature measuring points within the charger can be obtained, and the current temperature value can be determined based on the temperature values ​​of the multiple target temperature measuring points.

[0010] According to some embodiments of the present invention, the charging control method further includes: determining the maximum operating temperature threshold based on the current charging mode.

[0011] According to some embodiments of the present invention, the charging control method further includes: When switching charging modes, the maximum operating temperature threshold is updated; If the current temperature value is greater than the updated maximum operating temperature threshold, a preset heat dissipation strategy is executed until the current temperature value is reduced to the updated maximum operating temperature threshold.

[0012] According to some embodiments of the present invention, the charging control method further includes: When the current temperature value reaches the preset heat dissipation activation threshold, the heat dissipation device is activated, and the heat dissipation power of the heat dissipation device is adjusted according to the current temperature value.

[0013] In a second aspect, embodiments of the present invention provide a charging control device, comprising: A configuration module is used to configure the maximum current value of the target battery when the charger is electrically connected to the target battery. A temperature acquisition module is used to acquire the current temperature value of the charger; The first determining module is used to determine the current ideal charging current value based on the current temperature value and the preset maximum operating temperature threshold. The second determining module is used to determine the target charging current value based on the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. The closed-loop control module is used to perform closed-loop control on the charging current output by the charger based on the target charging current value.

[0014] Thirdly, embodiments of the present invention provide a charger, including a processor and a memory, wherein the memory stores computer execution instructions, and the processor executes the computer execution instructions to implement the above-mentioned charging control method.

[0015] Fourthly, embodiments of the present invention provide an electric mobility scooter, including a battery and the aforementioned charger, wherein the charger is used to charge the battery.

[0016] The embodiments of the present invention have at least the following beneficial effects: This invention uses temperature as a controllable boundary condition for the charging process. Closed-loop control enables the charger to continuously output a maximum current for efficient charging of the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This approach helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the charger's current temperature and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a maximum current based on the maximum operating temperature threshold while ensuring charging safety. This maximizes power utilization and helps to shorten charging time.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart illustrating the steps of the charging control method according to an embodiment of the present invention; Figure 2 This is a graph showing the change of the internal temperature of the charger over time according to an embodiment of the present invention. Figure 3 is a graph showing the change of charging current over time in the charger according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal topology of the charger according to an embodiment of the present invention; Figure 5 This is a schematic block diagram of the charging control device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the charger according to an embodiment of the present invention. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number, and "above," "below," "within," etc. are understood to include the stated number. If "first," "second," etc. are used in the description, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0021] As the core power source for modern electric vehicles, especially various electric mobility scooters, the energy replenishment efficiency of batteries directly determines the vehicle's range and ease of use. Therefore, improving charging efficiency has become a key bottleneck restricting the industry's technological development. For battery charging solutions, the primary consideration is charging safety. Therefore, existing technologies generally employ a relatively conservative and passive temperature control strategy to ensure safety during the charging process.

[0022] Specifically, existing devices typically have a preset, fixed temperature safety threshold. Once the temperature of critical components inside the charger reaches or exceeds this threshold, the charger implements a stepped power derating process, or even cuts off the output altogether. While this temperature control strategy mitigates overheating risks and ensures basic safety to some extent, its drawbacks are becoming increasingly apparent: because it doesn't distinguish between instantaneous temperature rise and sustained overheating, nor does it consider the device's actual heat dissipation margin, the charger often prematurely reduces its output power before reaching its true thermal limit. This conservative strategy results in severe underutilization of power, causing frequent interruptions or prolonged periods of inefficiency during charging, significantly extending the overall charging time and severely impacting user travel planning and overall experience.

[0023] Furthermore, most existing chargers operate at a fixed maximum output current for constant current, resulting in static and rigid control logic. This approach fails to adequately consider the dynamic changes in real-time heat dissipation conditions at the charging site, such as fluctuations in ambient temperature, differences in ventilation, and the nonlinear characteristics of heat accumulation within the device itself. Especially when charging in high-temperature environments, this easily triggers the temperature control protection mechanism, causing the charger to enter a derating protection state. Existing devices cannot dynamically adjust their output strategy to match changes in current heat dissipation conditions when facing complex and variable environmental conditions. Consequently, the device either fails to operate at full load when heat dissipation is good or derating protection occurs when the temperature exceeds the limit, thus failing to fully realize its charging potential.

[0024] Please refer to Figure 1This embodiment discloses a charging control method, including steps S100 to S500. It should be noted that the numbering of the steps in this embodiment is only for ease of review and understanding, and not to limit the execution order of the steps. The content of each step is described in detail below: S100: When the charger is electrically connected to the target battery, configure the maximum current value of the target battery. For example, a target battery refers to a battery to be charged. There can be one or more target batteries. When there are multiple target batteries, they can form a battery pack. In this embodiment, the battery pack or a single battery is collectively referred to as a target battery, and the charger is an electronic device used to provide charging power to the target battery. It should be understood that the electrical connection between the charger and the target battery means that a charging circuit is established between the charger and the target battery, and the input terminal of the charger is connected to the power supply terminal, such as mains power.

[0025] In some specific application examples, the target battery is equipped with a Battery Management System (BMS). The BMS is pre-configured with charging parameters, such as a charging current value, which is typically a safe charging current value determined based on the battery's design parameters. When the charger is electrically connected to the target battery, the target battery's BMS establishes a communication connection with the charger and sends the pre-configured charging current value to the charger in the communication information to request current. The charger configures the target battery's maximum current value based on the requested current value sent by the BMS. For example, it may use the requested current value as the target battery's maximum current value, or it may use the requested current value after mathematical processing (such as proportional calculation) as the battery's maximum current value.

[0026] In other specific application examples, the target battery may not be equipped with a battery management system (BMS), or although the target battery is equipped with a BMS, its BMS has not established a communication connection with the charger, or although the target battery is equipped with a BMS and its BMS has established a communication connection with the charger, the communication information does not include a pre-configured charging current value. In these cases, the charger sets a safe maximum current value for the battery based on its performance parameters, such as battery specifications, to ensure the charging safety of the target battery.

[0027] S200: Obtain the current temperature value of the charger; For example, a charger, as a power conversion device, primarily functions to convert alternating current (AC) to direct current (DC). During the power conversion process, besides the effective power used for AC-DC conversion, some energy is dissipated as heat, causing the charger temperature to rise. To subsequently use temperature as a controllable boundary condition to dynamically adjust the charging current, this embodiment employs a real-time sampling detection method to obtain the battery's current temperature value. Specifically, temperature sampling can be achieved through either built-in or external sampling. For instance, built-in sampling utilizes temperature-sensing components (such as thermistors) integrated inside the charger for temperature sampling and detection; while external sampling utilizes temperature detection components (such as contact or non-contact temperature sensors) located outside the charger for temperature sampling and detection.

[0028] S300: Determine the current ideal charging current value based on the current temperature value and the preset maximum operating temperature threshold; For example, a charger is a power conversion device composed of various electronic components. Each electronic component has a specific temperature tolerance range. If the operating temperature exceeds its own limit temperature threshold, irreversible thermal damage or even failure will occur. In order to maximize the power output capability of the charger while ensuring device safety, this embodiment sets the maximum operating temperature threshold as the boundary condition for power regulation of the charger. The maximum operating temperature threshold is configured to be lower than the limit temperature threshold, thus forming a preset temperature safety margin between the two. This prevents the charger from being damaged due to overheating and dynamically adjusts the charging power, ensuring that the charger always operates within a safe range close to its performance limits, thereby optimizing the power utilization rate during the charging process. It is worth mentioning that the current temperature value of the charger reflects comprehensive data such as the charger's operating heat generation, current heat dissipation conditions, and the current operating environment temperature. Based on the current temperature value and the preset maximum operating temperature threshold, the current ideal charging current value is determined. By fully considering the charger's real-time heat dissipation conditions and operating environment, the charging control can dynamically adapt to different operating environments.

[0029] S400: Determine the target charging current value based on the battery's maximum current value, the ideal charging current value, and the preset maximum charging current value; For example, the ideal charging current value is a theoretically optimal solution determined based on the highest operating temperature threshold, used to maximize performance under thermal management conditions. However, to meet the safety and reliability requirements of practical engineering applications, this embodiment implements dual current limits on the charging current from both the charger and the target battery perspectives. The maximum charging current value serves as the hardware safety upper limit on the charger side, used to limit the output current and prevent thermal failure or damage to the charger's internal electronic components due to overcurrent. Conversely, the maximum battery current value serves as the load safety upper limit on the target battery side, used to limit the input current and prevent damage to the target battery due to overcharging, thereby ensuring the overall safety of the charging process.

[0030] Based on the three key parameters mentioned above, the target charging current value in step 400 can be determined in various ways. For example, in some applications, the target charging current value can be determined by taking the minimum value among the three, that is, step S400 includes: determining the target charging current value based on the minimum value among the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. Alternatively, in other applications, the target charging current value can be obtained by weighted fusion of the three, that is, step S400 includes: determining the target charging current value based on the weighted average value among the battery maximum current value, the ideal charging current value, and the preset maximum charging current value.

[0031] S500 performs closed-loop control of the charging current output by the charger based on the target charging current value.

[0032] For example, this embodiment uses temperature as a controllable boundary condition and performs closed-loop control on the charging current output by the charger based on the target charging current value. In other words, through closed-loop control (feedback regulation), the operating temperature of the charger is controlled at the maximum operating temperature threshold, continuously approaching the thermodynamic limit within a safe threshold, allowing the charger to continuously output the maximum charging current, which is beneficial for improving the charger's output power density. The closed-loop control can be implemented using proportional control (P control), proportional-integral control (PI control), or proportional-integral-derivative control (PID control). It is worth noting that in conventional technologies, PID control is used for constant current or constant voltage control, while this embodiment uses PID control (closed-loop control) to achieve constant temperature control, that is, maintaining the charger's operating temperature at the maximum operating temperature threshold. PID control has advantages such as small steady-state error, small temperature overshoot, less oscillation, and strong anti-interference ability. Moreover, the parameters can be flexibly configured and adapted to various types of chargers.

[0033] Please refer to Figure 2 and Figure 3Figure 2 shows a graph of the charger's internal temperature (i.e., the current temperature value) changing over time, and Figure 3 shows a graph of the charging current changing over time. Combining these two figures, it can be seen that the charging control process in this embodiment includes the following three stages: Rapid heating and power ramp-up phase: In the early stages of charging, the charging current rapidly increases to boost the output power, causing the internal temperature of the charger to gradually rise. Current limiting and safety constraint stage: When the charging current increases to a preset limit threshold (e.g., the maximum battery current or the maximum charging current), the current remains constant to prevent overcurrent damage to the battery or charger and ensure safety in the initial stage. Thermal equilibrium and extreme output phase: As charging continues, the charger's internal temperature gradually approaches and stabilizes near the maximum operating temperature threshold. It's important to note that the maximum operating temperature threshold is set below the extreme temperature threshold, thus preserving a necessary safety temperature margin and effectively mitigating the risk of thermal failure. In this thermal equilibrium state, the charging current is dynamically adjusted and maintained within the allowable limit value for continuous output, based on the current operating conditions.

[0034] Therefore, this embodiment uses temperature as a controllable boundary condition for the charging process. Through closed-loop control, the charger can continuously output the maximum current to efficiently charge the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the charger's current temperature and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting the maximum current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0035] For step S300, the current ideal charging current value is determined based on the current temperature value and the preset maximum operating temperature threshold, including: Based on fuzzy logic control strategy, model predictive control strategy, or switching control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold.

[0036] That is: Based on the fuzzy logic control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold. For example, fuzzy logic control strategy refers to a strategy that achieves closed-loop control by establishing fuzzy rules between temperature deviation and current regulation. It does not require a precise mathematical model but has strong anti-interference capabilities. Here, temperature deviation refers to the difference between the charger's current temperature and its maximum operating temperature threshold.

[0037] Alternatively, based on a model predictive control strategy, the current ideal charging current value can be determined according to the current temperature value and the preset maximum operating temperature threshold. For example, model predictive control strategy refers to solving for the ideal charging current value by constructing an accurate control model, thereby avoiding the risk of overheating in advance and reducing the temperature fluctuation range.

[0038] Alternatively, based on a switch control strategy, the ideal charging current value can be determined according to the current temperature value and the preset maximum operating temperature threshold.

[0039] For example, a switching control strategy refers to determining the ideal charging current value by setting multiple temperature thresholds. This control strategy has low hardware costs and minimal processor (such as MCU) resource consumption, making it suitable for hardware-constrained control scenarios.

[0040] Therefore, by configuring various control strategies, the appropriate strategy can be selected based on the actual application requirements. It should be noted that the above control strategies are configured based on specific technical problems in engineering applications of dynamic thermal boundary control schemes (such as environmental interference, charging over-temperature risk, or limited hardware resources), and can achieve corresponding technical effects, such as strong anti-interference ability, early avoidance of over-temperature risk, or reduction of hardware costs.

[0041] In some application examples, the above steps, based on a fuzzy logic control strategy, determine the current ideal charging current value according to the current temperature value and the preset maximum operating temperature threshold, including: The temperature deviation value is determined based on the current temperature value and the preset maximum operating temperature threshold. The current adjustment value is determined based on the temperature deviation value and the preset temperature deviation range; Determine the current ideal charging current value based on the current target charging current value and the current adjustment value.

[0042] For example, the core technology of the fuzzy logic control strategy is to determine the ideal charging current value through fuzzy rules without constructing a precise mathematical model. The temperature deviation value is determined based on the difference between the current temperature and the preset maximum operating temperature threshold. The current adjustment value is then determined based on the temperature deviation value and a preset temperature deviation range. For instance, three temperature deviation ranges are divided using -5℃ and 0℃ as deviation boundaries: when the temperature deviation ΔT < -5℃, the current adjustment value is +20%; when -5℃ ≤ ΔT ≤ 0℃, the current adjustment value is 0; and when ΔT > 0℃, the current adjustment value is proportional to the temperature deviation value, such as -(ΔT × 8%). Finally, the current ideal charging current value is determined based on the current target charging current and the current adjustment value. For example, when ΔT < -5℃, the current ideal charging current value equals the current target charging current value × (1 + 20%); and when ΔT > 0℃, the current ideal charging current value equals the current target charging current value -(ΔT × 8%). By establishing fuzzy rules between temperature deviation and current adjustment, no precise mathematical model is required, and it has strong anti-interference capabilities.

[0043] In some application examples, the above steps, based on model predictive control strategies, determine the current ideal charging current value according to the current temperature value and the preset maximum operating temperature threshold, including: Based on a preset temperature prediction model, the predicted temperature value for future times is determined according to the current temperature value and the current charging current value. The ideal charging current value is determined based on the predicted temperature value and the preset maximum operating temperature threshold.

[0044] For example, the temperature prediction model can be a physical model built based on the thermoelectric coupling equation, such as: T(t+Δt)= f (Iout, T_env, λ), where T(t+Δt) represents the predicted temperature of the charger in the next Δt seconds (e.g., 5, 8, or 10 seconds); Iout represents the current charging current of the charger; T_env represents the current ambient temperature; and λ represents the current heat dissipation coefficient of the charger. The temperature prediction model comprehensively considers the influence of factors such as the charger's charging current, the current ambient temperature, and the heat dissipation of the radiator on temperature changes. It predicts the temperature value at future moments to ensure that the difference between the predicted temperature value and the maximum operating temperature threshold is within a preset range, thus reducing temperature fluctuations. When the predicted temperature value is greater than the maximum operating temperature threshold, the current ideal charging current value is negatively adjusted; when the temperature deviation between the predicted temperature value and the maximum operating temperature threshold is greater than the preset threshold, the current ideal charging current value is positively adjusted; otherwise, it remains unchanged.

[0045] In some application examples, the above steps, based on the switch control strategy, determine the current ideal charging current value according to the current temperature value and the preset maximum operating temperature threshold, including: Based on the preset maximum operating temperature threshold, determine the multi-level temperature threshold; Determine the current adjustment value based on the current temperature value and the multi-level temperature thresholds; Determine the current ideal charging current value based on the current target charging current value and the current adjustment value.

[0046] For example, the temperature threshold is proportional to the maximum operating temperature threshold. For instance, if the maximum operating temperature threshold is Tmax, then the multi-level temperature thresholds are determined to be 0.8Tmax and Tmax. If the current temperature value T < 0.8Tmax, then the current adjustment value is determined to be +15%; if 0.8Tmax ≤ T ≤ Tmax, then the current adjustment value is determined to be 0; if T > Tmax, then the current adjustment value is determined to be -5%. Finally, based on the current target charging current value and the current adjustment value, the current ideal charging current value is determined. For example, if the current temperature value T < 0.8Tmax, then the current ideal charging current value = target charging current value × (1 + 15%); similarly, if T > Tmax, then the current ideal charging current value = target charging current value × (1 - 5%).

[0047] Please refer to Figure 4 The diagram illustrates the internal topology of the charger. An internal temperature monitoring unit monitors the charger's internal temperature and uploads the monitored temperature data (such as the current temperature value) to a temperature-current control unit. This control unit adjusts the current based on the battery's current request and the received temperature data to control the charging unit's charging of the battery. During the charging process, some energy is dissipated as heat, affecting the charger's internal temperature. To achieve more accurate current adjustment, this embodiment uses the following method to precisely obtain the charger's internal temperature: In some application examples, in step S200 above, obtaining the current temperature value of the charger includes: Based on the current operating conditions, obtain the temperature value of the target temperature measuring point inside the charger, and determine the temperature value of the target temperature measuring point as the current temperature value; For example, as described above, a charger is a power conversion device composed of various electronic components. Different electronic components have corresponding functions, and the heat generated by each electronic component varies under different operating conditions. For instance, in applications with a wide input voltage range, the power switch is the key point for temperature rise under low voltage input, while the transformer is the key point for temperature rise under high voltage input. Therefore, this embodiment sets multiple different temperature measurement points inside the charger. Based on the current operating conditions, the temperature value of the target temperature measurement point inside the charger is obtained, and the temperature value of the target temperature measurement point is determined as the current temperature value, which can more accurately reflect the actual temperature of the charger. In addition to the power switch and transformer, the freewheeling diode or the PCB board used to support the electronic components can also be used as the target temperature measurement point to achieve accurate acquisition of the internal temperature data of the charger.

[0048] Alternatively, in other application examples, in step S200 above, obtaining the current temperature value of the charger includes: The system acquires the temperature values ​​of multiple target temperature measurement points inside the charger and determines the current temperature value based on these values.

[0049] For example, as described in the application examples above, multiple temperature measurement points can be set inside the charger. However, in some cases, the temperature data from a single measurement point cannot accurately reflect the internal temperature of the charger. To further improve the accuracy of temperature data acquisition, the current temperature value can be determined based on the temperature values ​​of multiple target measurement points. For example, weights can be assigned to different measurement points according to their thermal sensitivity, and the temperature values ​​of multiple target measurement points can be weighted and fused to determine the current temperature value.

[0050] To better cater to the diverse needs of different users, the charger is equipped with multiple charging modes, such as a high-power charging mode and a time-sharing charging mode. The maximum operating temperature threshold for the time-sharing charging mode is lower than that for the high-power charging mode. In other words, compared to the time-sharing charging mode, the high-power charging mode can control the charger's output current at a maximum operating temperature closer to the limit temperature threshold, thereby increasing the charger's output power. The time-sharing charging mode, on the other hand, can adapt to the charging needs of the target battery during idle periods (such as at night), controlling the charger's output charging current at a lower maximum operating temperature threshold. This can reduce heat loss of electronic components to some extent, thereby extending the charger's lifespan and the battery's cycle life. Based on this, the charging control method also includes: determining the maximum operating temperature threshold according to the current charging mode.

[0051] For example, the selection or switching of charging modes can be based on hardware operation or software logic. For instance, a high-power charging mode or a time-segmented charging mode can be selected via a physical switch or a control in the software interface. Based on the current charging mode, the maximum operating temperature threshold is determined. Then, closed-loop charging control is performed according to steps S100-500. Specifically, when the charger is electrically connected to the target battery, it enters the default charging mode, which is preferably the high-power charging mode.

[0052] With different charging modes configured, users can switch from one charging mode to another during the charging process according to actual application needs. Therefore, the charging control method also includes: Update the maximum operating temperature threshold when switching charging modes; If the current temperature is higher than the updated maximum operating temperature threshold, execute the preset heat dissipation strategy until the current temperature drops to the updated maximum operating temperature threshold.

[0053] For example, suppose the charger is operating in high-power charging mode and the current temperature has stabilized near the maximum operating temperature threshold. Then, the charging mode switches from high-power charging to time-segmented charging mode, updating the maximum operating temperature threshold to the data corresponding to time-segmented charging mode. Since the maximum operating temperature threshold of time-segmented charging mode is lower than that of high-power charging mode, during the transition phase after the mode switch, the charger's current operating temperature will be higher than the updated maximum operating temperature threshold. At this time, a preset heat dissipation strategy is executed, such as active heat dissipation and reducing the charging current, to ensure that the charger's current temperature linearly transitions to the updated maximum operating temperature threshold.

[0054] To increase the charger's output power, the charger can be equipped with an active heat dissipation function, which can be achieved using methods such as air cooling and / or liquid cooling. Based on this, the charging control method also includes: When the current temperature reaches the preset heat dissipation activation threshold, the heat dissipation device is activated, and the heat dissipation power of the heat dissipation device is adjusted according to the current temperature.

[0055] For example, if the charger detects the active cooling device is connected, the cooling parameters can be flexibly set according to different scenarios. When the temperature reaches the activation threshold, the cooling device is activated; when the temperature reaches the maximum cooling threshold, the cooling device operates at full load. For air-cooled solutions using fans as cooling devices, the fan speed is regulated by a PWM (Pulse Width Modulation) signal. When the internal temperature of the charger exceeds the activation threshold (e.g., 60°C), the fan starts, and the duty cycle of the PWM signal is at its initial value (10%). The fan cools the charger at the initial speed corresponding to the duty cycle. As the internal temperature of the charger increases, the duty cycle of the PWM signal also increases linearly. When the internal temperature of the charger reaches the maximum cooling threshold (e.g., 100°C), the duty cycle of the PWM signal is 100%, and the fan runs at full speed. In this way, the cooling device can be dynamically started and stopped and its cooling power controlled according to the charger's temperature rise, thereby achieving adaptive adjustment of the cooling capacity.

[0056] Please refer to Figure 5 Based on the above-described technical concept, embodiments of the present invention also provide a charging control device, comprising: Configuration module 110 is used to configure the maximum current value of the target battery when the charger is electrically connected to the target battery; Temperature acquisition module 120 is used to acquire the current temperature value of the charger; The first determining module 130 is used to determine the current ideal charging current value based on the current temperature value and the preset maximum operating temperature threshold. The second determining module 140 is used to determine the target charging current value based on the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. The closed-loop control module 150 is used to perform closed-loop control on the charging current output by the charger according to the target charging current value.

[0057] The inventive concept of this charging control device embodiment is the same as that of the charging control method embodiment described above. Contents not covered in this charging control device embodiment can be referred to in the charging control method embodiment described above, and will not be repeated here. This embodiment uses temperature as a controllable boundary condition for the charging process, and through closed-loop control, enables the charger to continuously output a limit current for efficient charging of the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the current temperature of the charger and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a limit current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0058] Please refer to Figure 6 This embodiment also provides a charger, including a processor 210 and a memory 220. The memory 220 stores computer execution instructions, and the processor 210 executes these instructions to implement the aforementioned charging control method. The specific details of the charging control method can be found above and will not be repeated here. This embodiment uses temperature as a controllable boundary condition for the charging process, and through closed-loop control, enables the charger to continuously output a maximum current to efficiently charge the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the charger's current temperature and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a maximum current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0059] This embodiment also provides an electric mobility scooter, including a battery and the aforementioned charger, which is used to charge the battery. The electric mobility scooter can be an electric two-wheeler, electric tricycle, electric scooter, balance bike, or electric bicycle, etc. This embodiment uses temperature as a controllable boundary condition for the charging process, and through closed-loop control, enables the charger to continuously output a maximum current to efficiently charge the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the current temperature of the charger and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a maximum current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0060] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed, implements the aforementioned charging control method. The specific details of the charging control method are described above and will not be repeated here. This embodiment uses temperature as a controllable boundary condition for the charging process, and through closed-loop control, enables the charger to continuously output a maximum current to efficiently charge the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the charger's current temperature and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a maximum current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0061] This embodiment also provides a computer program product, including a computer program that, when executed by a processor, implements the aforementioned charging control method. The specific content of the charging control method can be found above and will not be repeated here. This embodiment uses temperature as a controllable boundary condition for the charging process, and through closed-loop control, enables the charger to continuously output a maximum current to efficiently charge the target battery. Specifically, when the charger is electrically connected to the target battery, the maximum current value of the target battery is configured, and the target charging current value is determined based on the maximum battery current value, the ideal charging current value, and the maximum charging current value. This helps to balance the inherent charging performance of the target battery and ensure charging safety. The ideal charging current value is determined based on the charger's current temperature and a preset maximum operating temperature threshold, fully considering the dynamic changes in real-time heat dissipation conditions. This allows the charger to adaptively adjust according to the ambient thermal state, continuously outputting a maximum current based on the maximum operating temperature threshold while ensuring charging safety, maximizing power utilization and shortening charging time.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A charging control method, characterized in that, include: When the charger is electrically connected to the target battery, configure the maximum current value of the target battery. Obtain the current temperature value of the charger; Based on the current temperature value and the preset maximum operating temperature threshold, determine the current ideal charging current value; The target charging current value is determined based on the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. The charging current output by the charger is controlled in a closed loop based on the target charging current value.

2. The charging control method according to claim 1, characterized in that, The step of determining the current ideal charging current value based on the current temperature value and the preset maximum operating temperature threshold includes: Based on the fuzzy logic control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold. Alternatively, based on a model predictive control strategy, the current ideal charging current value is determined according to the current temperature value and the preset maximum operating temperature threshold. Alternatively, based on a switch control strategy, the current ideal charging current value can be determined according to the current temperature value and the preset maximum operating temperature threshold.

3. The charging control method according to claim 2, characterized in that, The fuzzy logic-based control strategy determines the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold, including: The temperature deviation value is determined based on the current temperature value and the preset maximum operating temperature threshold. The current adjustment value is determined based on the temperature deviation value and the preset temperature deviation range; Determine the current ideal charging current value based on the current target charging current value and the current adjustment value; or, The model-based predictive control strategy determines the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold, including: Based on a preset temperature prediction model, the predicted temperature value for future times is determined according to the current temperature value and the current charging current value. Based on the predicted temperature value and the preset maximum operating temperature threshold, determine the current ideal charging current value; or, The switch-based control strategy determines the current ideal charging current value based on the current temperature value and a preset maximum operating temperature threshold, including: Based on the preset maximum operating temperature threshold, determine the multi-level temperature threshold; The current adjustment value is determined based on the current temperature value and the multi-level temperature threshold. The current ideal charging current value is determined based on the current target charging current value and the current adjustment value.

4. The charging control method according to any one of claims 1 to 3, characterized in that, The step of obtaining the current temperature value of the charger includes: Based on the current operating conditions, obtain the temperature value of the target temperature measuring point inside the charger, and determine the temperature value of the target temperature measuring point as the current temperature value; Alternatively, the temperature values ​​of multiple target temperature measuring points within the charger can be obtained, and the current temperature value can be determined based on the temperature values ​​of the multiple target temperature measuring points.

5. The charging control method according to any one of claims 1 to 3, characterized in that, The charging control method further includes: The maximum operating temperature threshold is determined based on the current charging mode.

6. The charging control method according to claim 5, characterized in that, The charging control method further includes: When switching charging modes, the maximum operating temperature threshold is updated; If the current temperature value is greater than the updated maximum operating temperature threshold, a preset heat dissipation strategy is executed until the current temperature value is reduced to the updated maximum operating temperature threshold.

7. The charging control method according to any one of claims 1 to 3 or 6, characterized in that, The charging control method further includes: When the current temperature value reaches the preset heat dissipation activation threshold, the heat dissipation device is activated, and the heat dissipation power of the heat dissipation device is adjusted according to the current temperature value.

8. A charging control device, characterized in that, include: A configuration module is used to configure the maximum current value of the target battery when the charger is electrically connected to the target battery. A temperature acquisition module is used to acquire the current temperature value of the charger; The first determining module is used to determine the current ideal charging current value based on the current temperature value and the preset maximum operating temperature threshold. The second determining module is used to determine the target charging current value based on the battery maximum current value, the ideal charging current value, and the preset maximum charging current value. The closed-loop control module is used to perform closed-loop control on the charging current output by the charger based on the target charging current value.

9. A charger, comprising a processor and a memory, wherein the memory stores computer-executable instructions, characterized in that, When the processor executes the computer execution instructions, it is used to implement the charging control method as described in any one of claims 1 to 7.

10. An electric mobility scooter, characterized in that, It includes a battery and a charger as described in claim 9, the charger being used to charge the battery.

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