Intelligent terminal charging method and device in low-temperature environment, intelligent charger and medium

Abstract

The application relates to the technical field of battery charging, and provides a low-temperature environment intelligent terminal charging method and device, an intelligent charger and a medium, the method comprises the following steps: when a charging signal is detected and when a real-time environment temperature is less than a preset low-temperature threshold, outputting a preheating current to preheat a battery; after preheating is started for a preset first time period, periodically acquiring a real-time battery temperature and a real-time wind speed intensity of the intelligent terminal; compensating the real-time battery temperature according to the real-time environment temperature, the real-time wind speed intensity and material data of the battery to obtain a real-time compensation temperature; and adjusting charging parameters of the intelligent charger based on the real-time compensation temperature, and charging the battery based on the charging parameters. The application simultaneously considers the environment temperature, the wind speed intensity and the battery material, improves the accuracy of temperature compensation, can accurately adjust the charging parameters, and improves the charging effect of the intelligent terminal.

Description

Technical Field

[0001] This application relates to the field of battery charging technology, and in particular to a method, apparatus, smart charger and medium for charging smart terminals in low-temperature environments. Background Technology

[0002] Outdoors, users often face low temperatures, which pose challenges to phone charging. Low temperatures can degrade battery performance and increase internal resistance, affecting charging efficiency and battery life. Moreover, the outdoor environment is complex and variable, and the charging process is affected by various dynamic factors. Accurate charging is crucial to ensuring the continued use of mobile phones outdoors.

[0003] However, existing smart terminal charging methods only consider the ambient temperature of the smart terminal's environment for temperature compensation when charging in low-temperature environments. This results in inaccurate temperature compensation, making it impossible to accurately adjust charging parameters, affecting charging performance, and failing to meet the actual needs of outdoor use. Summary of the Invention

[0004] In view of the above, it is necessary to propose a method, device, smart charger and medium for charging smart terminals in low-temperature environments. Taking into account ambient temperature, wind speed and intensity and battery material, the accuracy of temperature compensation is improved, thereby enabling precise adjustment of charging parameters and improving the charging effect of smart terminals.

[0005] The first aspect of this application provides a method for charging a smart terminal in a low-temperature environment, the method comprising:

[0006] When a charging signal is detected, it is determined whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold.

[0007] When the real-time ambient temperature is lower than the preset low temperature threshold, a preheating current is output to preheat the battery;

[0008] After the preheating starts and a preset first time period is reached, the real-time battery temperature and real-time wind speed intensity of the smart terminal are periodically acquired.

[0009] The real-time battery temperature is compensated based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature.

[0010] The charging parameters of the smart charger are adjusted based on the real-time temperature compensation, and the battery is charged based on the charging parameters.

[0011] In an optional embodiment, the step of compensating the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature includes:

[0012] The delay coefficient is determined based on the real-time ambient temperature, the real-time wind speed and intensity, and the battery material data;

[0013] The basic temperature conduction delay value is obtained based on the aforementioned delay coefficient and the preheating duration.

[0014] Obtain the real-time power consumption current of the battery;

[0015] The base temperature conduction delay value is corrected based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value.

[0016] The real-time battery temperature is compensated based on the corrected temperature conduction delay value to obtain the real-time compensated temperature.

[0017] In an optional embodiment, obtaining the base temperature conduction delay value based on the delay coefficient and the preheating duration includes:

[0018] Determine the thermal conduction reference time corresponding to the material data of the battery;

[0019] The heat transfer efficiency is obtained based on the heat conduction reference time and the preheating duration.

[0020] The basic temperature conduction delay value is obtained based on the delay coefficient and the heat transfer efficiency.

[0021] In an optional embodiment, the step of correcting the base temperature conduction delay value based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value includes:

[0022] The power consumption correction factor is determined based on the real-time power consumption current.

[0023] The wind speed correction factor is determined based on the real-time wind speed intensity.

[0024] The base temperature conduction delay value is corrected based on the power consumption correction factor and the wind speed correction factor to obtain the corrected temperature conduction delay value.

[0025] In an optional embodiment, adjusting the charging parameters of the smart charger based on the real-time temperature compensation and charging the battery based on the charging parameters includes:

[0026] The real-time charging current and charging cutoff voltage are determined based on the real-time compensated temperature.

[0027] The battery is charged based on the real-time charging current and the charging cutoff voltage.

[0028] In an optional embodiment, the smart terminal charging method in a low-temperature environment further includes:

[0029] After a preset second time period for preheating is initiated, the voltage rise value of the battery is acquired, where the preset second time period is shorter than the preset first time period. The voltage rise value is then compared to a preset voltage rise threshold. If the voltage rise value is less than the preset voltage rise threshold, a preheating current threshold is determined based on the battery's maximum allowable current. The preheating current is then increased to the preheating current threshold. The preheating current threshold is then output to preheat the battery. Alternatively...

[0030] After a third preset time period following the start of preheating, the real-time temperature rise rate of the battery is acquired. This real-time temperature rise rate is compared with a preset first temperature rise rate threshold and a preset second temperature rise rate threshold. When the real-time temperature rise rate is less than the preset first temperature rise rate threshold, the preheating current is increased, and the increased preheating current is output to preheat the battery. When the real-time temperature rise rate is greater than the preset second temperature rise rate threshold, the preheating current is decreased, and the decreased preheating current is output to preheat the battery. When the real-time temperature rise rate is greater than the preset first temperature rise rate threshold and less than the preset second temperature rise rate threshold, the preheating current remains constant, and the preheating current is output to preheat the battery.

[0031] In an optional embodiment, the smart terminal charging method in a low-temperature environment further includes:

[0032] Send a status query message to the battery to obtain the real-time status data of the battery;

[0033] Based on the real-time status data, determine whether the battery has any abnormal conditions;

[0034] If an abnormal situation is detected, an alarm will be triggered.

[0035] A second aspect of this application provides a charging device for a smart terminal in a low-temperature environment, the charging device for a smart terminal in a low-temperature environment comprising:

[0036] The judgment module is used to determine whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold when a charging signal is detected.

[0037] The heating module is used to output a preheating current to preheat the battery when the real-time ambient temperature is lower than the preset low temperature threshold.

[0038] The acquisition module is used to periodically acquire the real-time battery temperature and real-time wind speed intensity of the smart terminal after the preheating starts and a preset first time period has elapsed.

[0039] The compensation module is used to compensate the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature.

[0040] The charging module is used to adjust the charging parameters of the smart charger based on the real-time temperature compensation, and to charge the battery based on the charging parameters.

[0041] A third aspect of this application provides a smart charger, the smart charger including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement all or part of the steps of the smart terminal charging method in a low-temperature environment.

[0042] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements all or part of the steps of the intelligent terminal charging method under low-temperature conditions.

[0043] The low-temperature charging method, device, smart charger, and medium provided in this application, when a charging signal is detected in a low-temperature charging scenario, first acquire the real-time ambient temperature of the environment where the smart terminal is located. If the real-time ambient temperature is lower than a preset low-temperature threshold, preheating is initiated. This effectively activates the battery whose performance has degraded under low temperatures, preventing problems such as increased internal resistance and reduced charging / discharging efficiency caused by low temperatures. This ensures the normal charging performance of the battery in low-temperature environments and extends battery life. After a preset preheating period, the real-time battery temperature and real-time wind speed of the smart terminal are periodically acquired. The battery temperature is compensated by integrating real-time ambient temperature, real-time wind speed, and battery material data, fully considering the interference of various factors on battery temperature measurement. This compensation more accurately reflects the actual temperature state of the battery, making subsequent charging parameter adjustments more targeted and accurate. Finally, adjusting the charging parameters of the smart charger based on real-time temperature compensation enables dynamic optimization of the charging process. This prevents battery damage due to low-temperature charging and allows for reasonable energy allocation according to actual conditions, improving charging efficiency and safety, and enhancing the user experience of using smart terminals in low-temperature environments. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1A flowchart illustrating a method for charging a smart terminal in a low-temperature environment, as provided in this application embodiment;

[0046] Figure 2 A functional block diagram of a smart terminal charging device for low-temperature environments provided in this application embodiment;

[0047] Figure 3 This is a schematic diagram of the structure of a smart charger provided in an embodiment of this application. Detailed Implementation

[0048] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing an embodiment in one alternative implementation and is not intended to be limiting of the application.

[0050] Figure 1 This is a flowchart illustrating a method for charging a smart terminal in a low-temperature environment, as provided in an embodiment of this application. The method is applied to a smart charger and specifically includes the following steps.

[0051] S11, when a charging signal is detected, determines whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold.

[0052] Once a smart device (e.g., a rugged phone, models M200PLUS, M24S, M24SE, F1S, and ZN139T) is connected to the smart charger via a charging plug or physical interface such as contacts, the smart charger detects the charging signal. A smart charger is a charging device that integrates charging control, temperature detection, and other functional modules to provide power input to the smart device and regulate the charging process. The smart device can use a single battery as its built-in power source, or it can be powered by combining multiple batteries in parallel or series to form a battery.

[0053] When the smart charger detects a charging signal, it immediately activates the first temperature sensor to collect the real-time temperature of the battery's environment. This first temperature sensor is integrated near the charging port of the smart charger. For ease of description below, the real-time temperature of the battery's environment will be referred to as the real-time ambient temperature.

[0054] The preset low-temperature threshold is a pre-set critical temperature value used to determine whether preheating is required, such as -0°C or -10°C. The smart charger determines whether the smart terminal's battery's real-time ambient temperature is lower than the preset low-temperature threshold to ascertain whether the smart terminal is in a low-temperature environment. When the battery's real-time ambient temperature is lower than or equal to the preset low-temperature threshold, it indicates that the smart terminal is in a low-temperature environment and requires special charging measures. When the battery's real-time ambient temperature is higher than the preset low-temperature threshold, it indicates that the smart terminal is in a relatively suitable temperature environment and can be charged according to the conventional charging strategy and parameters without activating the special charging protection mechanism for low-temperature environments.

[0055] S12, when the real-time ambient temperature is less than the preset low temperature threshold, output a preheating current to preheat the battery.

[0056] At low temperatures, the viscosity of the electrolyte increases, leading to increased resistance to the migration of charge carriers such as lithium ions and a significant rise in internal resistance. If a high-current charge is applied initially, it will generate substantial heat within the already high-resistance battery, posing safety risks and impacting battery performance and lifespan. Therefore, when the smart charger determines that the real-time ambient temperature of the smart device's battery is below a preset low-temperature threshold, it initiates a preheating process, initially using a small current to preheat the battery. This small-current preheating avoids excessive heat generation in a short time, allowing heat to be distributed more evenly within the battery, gradually increasing its temperature, reducing internal resistance, and creating conditions for subsequent normal charging.

[0057] The preheating current is a low-power current output by the smart charger to the battery during the preheating phase. Its function is to generate Joule heat through the battery's internal resistance, thereby raising the battery's temperature. The preheating current must be sufficient to effectively generate heat to warm the battery, but it must also avoid damaging the battery due to excessive current, such as overheating or damaging the battery's internal structure. In practice, the smart charger uses a controller based on pulse modulation technology to control the switching power supply to output a preheating current of a set power, which is then applied to the battery of the smart device to charge it.

[0058] In practical use, smart terminals may be exposed to various low-temperature environments. A fixed preheating current cannot be flexibly adjusted according to changes in ambient temperature. Excessive current may cause localized overheating of the battery, accelerating the aging of internal battery materials and shortening battery life. Conversely, insufficient current will fail to effectively raise the battery temperature, leaving the battery in a low-temperature, unsuitable charging state for extended periods, which will also damage the battery. Therefore, once a smart charger and a smart terminal are connected, the charger can send an information request signal to the smart terminal through their communication interface (e.g., USB interface, dedicated charging interface, etc.). Upon receiving the information request signal, the smart terminal's internal storage chip will feed back the battery type and capacity to the smart charger through the communication interface. The smart charger then uses a pre-stored preheating current table to query the preheating current corresponding to the real-time ambient temperature and the battery type and capacity.

[0059] The preheating ammeter is a current value that is suitable for preheating the battery in the current low-temperature environment, obtained through simulation experiments based on different ambient temperatures, battery types, and battery capacities.

[0060] In the above embodiments, the preheating current is dynamically adjusted based on the real-time ambient temperature and the type and capacity of the battery to ensure that the battery can be provided with a suitable preheating effect under different low temperature environments. This avoids the problem of slow battery temperature rise due to insufficient preheating current, which prolongs the charging preparation time and can effectively shorten the overall charging time.

[0061] S13, after the preheating starts and a preset first time period is reached, the real-time battery temperature and real-time wind speed intensity of the smart terminal are periodically acquired.

[0062] The preheating current meter records not only the preheating current corresponding to different ambient temperatures, battery types, and battery capacities, but also the preheating duration matched to the preheating current. The preheating duration is the shortest time required for the battery temperature to rise from an initial low temperature to a target temperature under given ambient temperature, battery type, and battery capacity, using the appropriate preheating current. The target temperature is the ideal temperature value for the battery to return to normal operating conditions, for example, 20°C.

[0063] The preheating duration, matched with the preheating current, can be used as the preset first time period. After the preheating process is completed, the battery temperature is considered to have reached the target temperature, meaning the battery has returned to normal operating conditions. The system then periodically acquires the real-time ambient temperature, real-time battery temperature, and real-time wind speed of the smart terminal.

[0064] In practice, the smart charger can activate a wind speed sensor to obtain the real-time wind speed and intensity of the environment in which the smart terminal is located. The wind speed sensor can be integrated near the charging port of the smart charger. The smart charger can communicate with the battery management system (BMS) of the smart terminal to request the real-time internal temperature of the smart terminal's battery (real-time battery temperature). The smart terminal's battery management system collects the real-time battery temperature through a second temperature sensor and feeds it back to the smart charger. The second temperature sensor can be located inside the battery.

[0065] In an optional embodiment, the smart charger can also obtain the real-time battery temperature of the smart terminal after a preset first time period and determine whether the real-time battery temperature has reached the target temperature. If the battery temperature still does not reach the target temperature after the preset first time period at low temperature, it can switch to a strong preheating mode or stop charging to avoid lithium dendrite growth caused by continuous low current charging, which would affect battery performance and lifespan.

[0066] In an optional embodiment, the smart terminal charging method in a low-temperature environment further includes:

[0067] After the preheating starts and a preset second time period is reached, the voltage rise value of the battery is obtained;

[0068] Compare whether the voltage rise value is less than a preset voltage rise threshold;

[0069] When the voltage rise value is less than the preset voltage rise threshold, the preheating current threshold is determined according to the maximum allowable current of the battery.

[0070] Increase the preheating current to the preheating current threshold.

[0071] The preheating current threshold is output to preheat the battery.

[0072] The preset second time period is shorter than the preset first time period. The preset second time period can be determined based on the preset first time period; for example, it can be set to half of the preset first time period.

[0073] The voltage rise is the difference between the open-circuit voltage before and after preheating, which reflects, to some extent, the activity of the internal chemical reaction and the temperature rise during the preheating process. The open-circuit voltage before preheating refers to the terminal voltage of the battery in an open-circuit state after confirming connection to the smart charger and before performing the preheating operation. The open-circuit voltage after preheating refers to the terminal voltage collected when the real-time battery temperature is below the preset low-temperature threshold, and the battery is returned to an open-circuit state after outputting a preheating current at the set power. An open-circuit state means that the battery pack and smart charger have only established an electrical connection, but no charging current loop has been formed. At this time, the battery pack is in a static state, and the voltage is mainly determined by the equilibrium potential of the internal chemical reaction. The smart charger keeps the electronic switch of the charging circuit open, ensuring that the charging circuit is not conductive. At this time, the battery is in an open-circuit state, and no charging current flows. The controller samples the voltage at the positive and negative terminals of the battery through a high-precision voltage acquisition module to obtain the open-circuit voltage.

[0074] The preset voltage rise threshold is a pre-defined voltage difference standard used to determine whether the battery preheating effect meets the requirements. The preset voltage rise threshold can be determined comprehensively based on factors such as battery type, specifications, usage environment, and subsequent charging or usage needs.

[0075] When the voltage rise is less than the preset voltage rise threshold, it indicates that the battery temperature is rising slowly under the current preheating current, the activation level of the internal active materials is insufficient, and the battery cannot reach the target temperature within a reasonable time. Therefore, the preheating current needs to be increased. If the voltage rise reaches or exceeds the preset voltage rise threshold, it indicates that the battery temperature has risen to a certain level under the current preheating current, the internal active materials have been well activated, and the internal resistance has decreased. In this case, the battery can continue to be preheated with the preheating current.

[0076] The maximum allowable current of the battery can be determined based on its type, and a preheating current threshold can be determined based on this maximum allowable current. Finally, the battery can be preheated using the determined preheating current threshold. For example, 50% of the battery's maximum allowable current can be determined as the preheating current threshold.

[0077] In the above optional embodiments, increasing the preheating current can improve the battery heating efficiency and shorten the time required to reach the target temperature, thereby reducing the battery's exposure time at low temperatures.

[0078] In an optional embodiment, the smart terminal charging method in a low-temperature environment further includes:

[0079] After the preheating starts for a third preset time period, the real-time temperature rise rate of the battery is obtained;

[0080] The real-time temperature rise rate is compared with a preset first temperature rise rate threshold and a preset second temperature rise rate threshold, respectively.

[0081] When the real-time temperature rise rate is less than the preset first temperature rise rate threshold, the preheating current is increased, and the increased preheating current is output to preheat the battery.

[0082] When the real-time temperature rise rate is greater than the preset second temperature rise rate threshold, the preheating current is reduced, and the reduced preheating current is output to preheat the battery.

[0083] When the real-time temperature rise rate is greater than the preset first temperature rise rate threshold and less than the preset second temperature rise rate threshold, the preheating current remains unchanged, and the preheating current is output to preheat the battery.

[0084] The third preset time period is shorter than the first preset time period. The third preset time period can be determined based on the first preset time period; for example, it can be set to half of the first preset time period.

[0085] Real-time temperature rise rate refers to the rate at which the battery's temperature rises per unit of time. This is achieved by using a temperature sensor built into the battery to collect battery temperature data in real time at a set sampling frequency. Each time a new battery temperature is collected, the current temperature is subtracted from the previously collected temperature to obtain the temperature difference. This difference is then divided by the time interval between the two collections to calculate the battery's temperature rise rate over that time period. The real-time temperature rise rate reflects the rate at which the battery heats up during the preheating process.

[0086] The preset first temperature rise rate threshold and the preset second temperature rise rate threshold are pre-set standard values ​​used to determine the battery temperature rise status. The preset first temperature rise rate threshold (e.g., 0.3℃ / min) is less than the preset second temperature rise rate threshold (e.g., 0.7℃ / min). The preset first temperature rise rate threshold is used to determine when the battery temperature rises too slowly. The preset second temperature rise rate threshold is used to determine when the battery temperature rises too quickly.

[0087] When the real-time temperature rise rate is less than a preset first temperature rise rate threshold, it means that the battery temperature rise rate is too slow or unsatisfactory, requiring adjustment of the preheating strategy to accelerate battery temperature rise. In practice, the difference between the preset first temperature rise rate threshold and the real-time temperature rise rate can be calculated to obtain a first rate difference. The increase in preheating current is then determined based on this first rate difference. For example, the first rate difference can be compared with a preset first rate difference threshold. When the first rate difference is less than the preset first rate difference threshold, the preheating current is increased by a preset first proportion. When the first rate difference is greater than the preset first rate difference threshold, the preheating current is increased by a preset second proportion. The preset first proportion (e.g., 10%) is less than the preset second proportion (e.g., 20%).

[0088] When the real-time temperature rise rate exceeds a preset second temperature rise rate threshold, it indicates that the battery is heating up too quickly, potentially posing an overheating risk, and measures need to be taken to reduce the heating rate. In practice, the difference between the real-time temperature rise rate and the preset second temperature rise rate threshold can be calculated to obtain the second rate difference. The reduction amount of the preheating current can then be determined based on this second rate difference. For example, the second rate difference can be compared with a preset second rate difference threshold. When the second rate difference is less than the preset second rate difference threshold, the preheating current is reduced by a preset first proportion; when the first rate difference is greater than the preset second rate difference threshold, the preheating current is reduced by a preset second proportion.

[0089] When the real-time temperature rise rate is greater than the preset first temperature rise rate threshold and less than the preset second temperature rise rate threshold, it means that the battery can heat up at a suitable rate under the current preheating current and environmental conditions, which meets the preheating requirements. Therefore, the battery will continue to be preheated with the current preheating current.

[0090] In the above optional embodiments, the preheating current is dynamically adjusted to allow the battery to be preheated at a suitable temperature. When the temperature rise rate is too rapid, the preheating current is reduced in time to effectively prevent safety accidents such as battery expansion, leakage, or even explosion due to overheating. When the temperature rise rate is too slow, the preheating current is increased in time, allowing the battery to reach its activation temperature more quickly and preventing the battery from remaining in a low-temperature state for extended periods. Low temperatures may cause physical changes in the battery's internal structure, such as electrolyte solidification and electrode material shrinkage, resulting in irreversible damage to the battery. Furthermore, dynamically increasing or decreasing the preheating current based on the temperature rise rate allows for precise adjustment of the preheating current according to the actual temperature rise of the battery. This avoids energy waste caused by fixed high-current preheating and also prevents excessive energy consumption due to excessively long preheating times caused by low-current preheating. Maintaining the current preheating current when the battery temperature rises normally ensures both a sufficient heating rate and prevents excessive energy consumption, thus improving the energy efficiency of the entire preheating process.

[0091] S14, the real-time battery temperature is compensated based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature.

[0092] After the preset first preheating period, the preheating of the smart device is complete. Once preheating is complete, the phone can enter normal charging mode according to its usage needs.

[0093] Since low-temperature environments are not constant and may fluctuate with time, geographical location, etc., in order to cope with dynamic temperature changes and ensure stable battery performance during normal charging of smart terminals, the real-time battery temperature and real-time wind speed intensity of the smart terminal can be periodically acquired. The real-time battery temperature can be compensated and corrected based on the real-time ambient temperature, real-time wind speed intensity, and battery material data to obtain an accurate battery temperature.

[0094] In practical applications, there are situations where a smart device's built-in functions (such as GPS positioning and flashlight illumination) are activated while it is being charged. During use, different functional modules generate varying amounts of heat, and these heat variations affect the battery temperature. Therefore, real-time battery temperature compensation can be achieved based on ambient temperature, wind speed, battery material data, and current consumption. This approach considers both static environmental factors and the battery's dynamic characteristics, ensuring the charging strategy closely aligns with actual operating conditions and significantly improving the accuracy and adaptability of low-temperature charging.

[0095] In an optional embodiment, the step of compensating the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature includes:

[0096] The delay coefficient is determined based on the real-time ambient temperature, the real-time wind speed and intensity, and the battery material data;

[0097] The basic temperature conduction delay value is obtained based on the aforementioned delay coefficient and the preheating duration.

[0098] Obtain the real-time power consumption current of the battery;

[0099] The base temperature conduction delay value is corrected based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value.

[0100] The real-time battery temperature is compensated based on the corrected temperature conduction delay value to obtain the real-time compensated temperature.

[0101] The battery material data includes the thermal conductivity of the battery sealing layer material; for example, the thermal conductivity of silicone material is 0.2 W / (m²). The thermal conductivity of the rubber material is 0.15 W / (m²). K). The smart charger's memory pre-stores a battery thermal conductivity data table. This table records the mapping relationship between different battery types and their material data. The smart charger can then match the material data corresponding to the battery type based on this mapping relationship.

[0102] The smart charger's memory also stores a thermal conduction delay coefficient table. This table records the mapping relationship between different ambient temperatures, wind speeds, material data, and delay coefficients. Based on this mapping relationship, the smart charger can match the delay coefficient to the real-time ambient temperature, the real-time wind speed, and the battery's material data.

[0103] The preheating duration is the time elapsed from the start of preheating to the current moment. Based on the physical laws of heat conduction, the base temperature conduction delay value can be calculated using the delay coefficient and the preheating duration.

[0104] The real-time power consumption current of the battery can be obtained from the battery management system through the communication channel between the smart charger and the battery.

[0105] The baseline temperature conduction delay value is calculated based on the delay coefficient and preheating duration, reflecting the average time required from the start of preheating to the battery temperature reaching the target temperature and being conducted to relevant parts under ideal conditions. However, in actual use, battery power consumption is dynamic, and the baseline temperature conduction delay value does not consider the impact of real-time battery current consumption on temperature. As the battery discharge current increases, the generated heat also increases, affecting the temperature distribution and conduction speed of the battery and its surrounding environment. Wind speed affects airflow over the battery surface, thus altering the battery's heat dissipation conditions. The baseline temperature conduction delay value does not consider real-time wind speed intensity, causing it to inaccurately reflect battery temperature conduction under different wind speed conditions. For example, in a windy environment, battery heat dissipation is faster, and the temperature conduction delay may be shorter; while in a windless or light-wind environment, heat dissipation is slower, and the temperature conduction delay may be longer. Correcting the temperature conduction delay value based on real-time current consumption and real-time wind speed intensity results in a corrected temperature conduction delay value that more accurately reflects the battery's temperature changes during actual use, making temperature compensation more timely and accurate. Compensating for real-time battery temperature based on the corrected temperature conduction delay value can improve the effectiveness of temperature compensation.

[0106] In an optional embodiment, obtaining the base temperature conduction delay value based on the delay coefficient and the preheating duration includes:

[0107] Determine the thermal conduction reference time corresponding to the material data of the battery;

[0108] The heat transfer efficiency is obtained based on the heat conduction reference time and the preheating duration.

[0109] The basic temperature conduction delay value is obtained based on the delay coefficient and the heat transfer efficiency.

[0110] Different battery materials correspond to different thermal conductivity reference times. For example, a silicone battery has a thermal conductivity reference time of 120 seconds, while a rubber battery has a thermal conductivity reference time of 150 seconds. The thermal conductivity reference time is used to quantify the rate of change of temperature detection lag caused by the sealing layer. The ratio of the thermal conductivity reference time to the preheating duration is taken as the heat transfer efficiency.

[0111] In an optional implementation, the base temperature conduction delay value can be calculated using the following formula: ΔTbase = α × e^(-t / t0), where t0 is the base time for heat conduction, t is the duration of preheating, α is the delay coefficient, and ΔTbase is the base temperature conduction delay value.

[0112] Temperature compensation correction is performed when preheating is basically complete. At this point, the device or battery has undergone a certain heating process but has not yet reached a fully stable thermal state. In the above optional embodiments, the base temperature conduction delay value is calculated based on the preheating duration, a delay coefficient, and the heat conduction reference time, enabling dynamic quantification of the temperature lag under different operating conditions. If the preheating duration t is short, the exponential term e^(-t / t0) is large, indicating that the temperature has not yet been fully conducted and stabilized, requiring a larger compensation amount; conversely, as the preheating duration t increases, the exponential term e^(-t / t0) gradually decreases, indicating that the temperature lag gradually decreases. This dynamic quantification method can track temperature change trends in real time, providing more accurate data support for temperature compensation.

[0113] In an optional embodiment, the step of correcting the base temperature conduction delay value based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value includes:

[0114] The power consumption correction factor is determined based on the real-time power consumption current.

[0115] The wind speed correction factor is determined based on the real-time wind speed intensity.

[0116] The base temperature conduction delay value is corrected based on the power consumption correction factor and the wind speed correction factor to obtain the corrected temperature conduction delay value.

[0117] In this embodiment, the basic temperature conduction delay value is corrected by a power consumption correction factor and a wind speed correction factor to obtain a corrected temperature conduction delay value, which is the final temperature conduction delay value.

[0118] The power consumption correction factor can be calculated using the following formula: βconsumption = a + b × (Iconsumption / Ipreheat), where a and b are constants, Iconsumption is the real-time power consumption current, and Ipreheat is the set preheating current output by the smart charger.

[0119] The wind speed correction factor can be calculated using the following formula: βwind = cd × (V / V0), where c and d are constants, V is the real-time wind speed intensity, and V0 is the standard wind speed intensity, for example, 5 m / s.

[0120] After obtaining the power consumption correction factor and wind speed correction factor, the corrected temperature conduction delay value can be obtained by multiplying these factors by the base temperature conduction delay value. Finally, the real-time battery temperature is compensated based on the corrected temperature conduction delay value. The real-time compensated temperature is the sum of the corrected temperature conduction delay value and the real-time battery temperature.

[0121] S15, adjust the charging parameters of the smart charger based on the real-time temperature compensation, and charge the battery based on the charging parameters.

[0122] Once the real-time compensated temperature is obtained, the preheating process of the smart terminal battery can be ended, and the charging parameters of the smart charger can be adjusted to charge the battery normally based on the charging parameters.

[0123] In an optional embodiment, adjusting the charging parameters of the smart charger based on the real-time temperature compensation and charging the battery based on the charging parameters includes:

[0124] The real-time charging current and charging cutoff voltage are determined based on the real-time compensated temperature.

[0125] The battery is charged based on the real-time charging current and the charging cutoff voltage.

[0126] The smart charger stores multiple charging curves, each corresponding to a different battery type. That is, each battery type has its own standard charging curve, reflecting the maximum charging current the battery can safely withstand at different temperatures. Using the battery type, a target charging curve is matched among these curves. Then, by using the real-time compensated temperature and the target charging curve, the maximum safe charging current value at the corresponding real-time compensated temperature is found and used as the real-time charging current. For example, at 20°C, the maximum safe charging current value is 1C (where C represents the battery capacity, and 1C represents the current required to fully charge the battery in one hour).

[0127] At lower temperatures, the battery's charging cut-off voltage needs to be appropriately reduced to prevent overcharging from damaging the battery; while at higher temperatures, the charging cut-off voltage can approach the standard value. Based on the real-time compensation temperature and a pre-stored temperature-voltage relationship table in memory, the charging cut-off voltage at the real-time compensation temperature is found. For example, at a compensation temperature of 20°C, the battery's charging cut-off voltage is 4.2V.

[0128] During charging, the compensation temperature is continuously monitored. If the compensation temperature rises due to factors such as heat generation during charging, the charging curve is rematched based on the new compensation temperature to increase the charging current; conversely, if the compensation temperature drops, the charging current is reduced to ensure that the charging process always operates within a safe current range.

[0129] The charging method of this application consists of two stages: a preheating stage and a charging stage. In the preheating stage, no actual charging is performed; only a very low current is used to activate the smart terminal's battery, allowing the battery temperature to rise to the target temperature. After preheating is complete, the charging stage begins, at which point the battery is charged according to the real-time charging current and the charging cutoff voltage.

[0130] In low-temperature charging scenarios, upon detecting a charging signal, the system first acquires the real-time ambient temperature of the smart terminal's environment. Preheating is initiated when the ambient temperature falls below a preset low-temperature threshold. This effectively activates batteries that are experiencing performance degradation at low temperatures, preventing issues such as increased internal resistance and reduced charging / discharging efficiency caused by low temperatures. This ensures normal charging performance and extends battery life in low-temperature environments. After a preset preheating period, the system periodically acquires the smart terminal's real-time battery temperature and wind speed. It then compensates for the battery temperature by integrating real-time ambient temperature, wind speed, and battery material data, fully considering the interference from various factors on battery temperature measurement. This compensation more accurately reflects the actual battery temperature state, making subsequent charging parameter adjustments more targeted and accurate. Finally, adjusting the smart charger's charging parameters based on real-time temperature compensation enables dynamic optimization of the charging process. This prevents battery damage from low-temperature charging and allows for reasonable energy allocation based on actual conditions, improving charging efficiency and safety, and enhancing the user experience of using smart terminals in low-temperature environments.

[0131] In an optional embodiment, the smart terminal charging method in a low-temperature environment further includes:

[0132] Send a status query message to the battery to obtain the real-time status data of the battery;

[0133] Based on the real-time status data, determine whether the battery has any abnormal conditions;

[0134] If an abnormal situation is detected, an alarm will be triggered.

[0135] The smart charger sends instructions or messages to the battery in the smart device to inquire about its status in order to obtain status data (real-time status data) reflecting the battery's current actual state. Real-time status data may include: battery voltage, current, temperature, remaining charge, etc.

[0136] After acquiring the battery's real-time status data, the smart charger analyzes and judges the data according to pre-set standards and rules. For example, if the battery temperature exceeds the normal operating temperature range, or the voltage value is lower than the safety lower limit, the battery is determined to be in an abnormal condition.

[0137] When the smart charger analyzes and determines that the battery is in an abnormal condition, it will immediately trigger an alarm mechanism. Alarm notifications can be presented in various ways, such as audible alarms, flashing indicator lights, or displaying specific alarm information on the screen of the relevant device, thus reminding relevant personnel to take timely action.

[0138] The above-mentioned optional embodiments, by acquiring real-time battery status data, can optimize and manage the battery charging and discharging process based on this data, avoiding overcharging, over-discharging, and prolonged exposure to high temperatures, which are detrimental to battery health. Once an abnormality is detected, an alarm is immediately triggered, enabling the user to take swift action, such as stopping use, replacing the battery, or performing repairs, to prevent the abnormality from worsening and causing serious safety accidents such as battery explosions or fires, thus ensuring battery safety during use.

[0139] Example 2

[0140] Figure 2 This is a functional block diagram of the smart terminal charging device for low-temperature environments provided in the embodiments of this application.

[0141] In some embodiments, the low-temperature environment smart terminal charging device 20 may include multiple functional modules composed of program code segments. The program code of each program segment in the low-temperature environment smart terminal charging device 20 may be stored in the memory of the smart terminal and executed by at least one processor to perform (see details). Figure 1 (Description) The function of charging smart terminals in low-temperature environments.

[0142] In this embodiment, the intelligent terminal charging device 20 in low-temperature environments can be divided into multiple functional modules according to the functions it performs. These functional modules may include: a judgment module 201, a heating module 202, an acquisition module 203, a compensation module 204, a charging module 205, and an alarm module 206. The term "module" in this application refers to a series of computer-readable instruction segments that can be executed by at least one processor and perform a fixed function, stored in memory. In this embodiment, the functions of each module will be detailed in subsequent embodiments.

[0143] The judgment module 201 is used to determine whether the real-time ambient temperature of the smart terminal battery is less than a preset low temperature threshold when a charging signal is detected.

[0144] The heating module 202 is used to output a preheating current to preheat the battery when the real-time ambient temperature is lower than the preset low temperature threshold.

[0145] The acquisition module 203 is used to periodically acquire the real-time battery temperature and real-time wind speed intensity of the smart terminal after the preheating starts and a preset first time period has elapsed.

[0146] The compensation module 204 is used to compensate the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature.

[0147] The charging module 205 is used to adjust the charging parameters of the smart charger based on the real-time temperature compensation, and to charge the battery based on the charging parameters.

[0148] The acquisition module 203 is further configured to acquire the voltage rise value of the battery after a preset second time period is started during preheating, wherein the preset second time period is shorter than the preset first time period.

[0149] The heating module 202 is further configured to compare whether the voltage rise value is less than a preset voltage rise threshold; when the voltage rise value is less than the preset voltage rise threshold, determine a preheating current threshold based on the maximum allowable current of the battery; increase the preheating current to the preheating current threshold; and output the preheating current threshold to preheat the battery.

[0150] The alarm module 206 is used to send a status query message to the battery to obtain the real-time status data of the battery; determine whether there is an abnormal condition of the battery based on the real-time status data; and trigger an alarm if there is an abnormal condition.

[0151] It should be understood that the various variations and specific embodiments of the low-temperature charging method for smart terminals provided in the above embodiments are also applicable to the low-temperature charging device for smart terminals in this embodiment. Through the detailed description of the aforementioned low-temperature charging method for smart terminals, those skilled in the art can clearly understand the implementation process of the low-temperature charging device for smart terminals in this embodiment. For the sake of brevity, it will not be described in detail here.

[0152] Example 3

[0153] This embodiment provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps described in the embodiment of the smart terminal charging method under low-temperature conditions. For example... Figure 1 S11-S15 are shown.

[0154] S11, when a charging signal is detected, determines whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold.

[0155] S12, when the real-time ambient temperature is lower than the preset low temperature threshold, output a preheating current to preheat the battery;

[0156] S13, after the preheating starts and a preset first time period is reached, the real-time battery temperature and real-time wind speed intensity of the smart terminal are periodically acquired.

[0157] S14, the real-time battery temperature is compensated based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature;

[0158] S15, adjust the charging parameters of the smart charger based on the real-time temperature compensation, and charge the battery based on the charging parameters.

[0159] Example 4

[0160] See Figure 3 The diagram shown is a structural schematic of a smart charger provided in an embodiment of this application. In a preferred embodiment of this application, the smart charger 3 includes: a memory 301, at least one processor 302, at least one communication bus 303, and multiple sensors 304.

[0161] Those skilled in the art should understand that Figure 3 The structure of the smart charger shown does not constitute a limitation of the embodiments of this application. The smart charger 3 may also include more or fewer other hardware or software, or different component arrangements than shown.

[0162] In some embodiments, the memory 301 stores a computer program and an operating system. When executed by the at least one processor 302, the computer program implements all or part of the steps in the intelligent charger charging method for low-temperature environments as described above. The memory 301 includes a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data. Further, the computer-readable storage medium may primarily include a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application program required for a function, etc.

[0163] In some embodiments, the at least one processor 302 is the control unit of the smart charger 3, connecting various components of the smart charger 3 via various interfaces and lines. It executes programs or modules stored in the memory 301 and calls data stored in the memory 301 to perform various functions and process data of the smart charger 3. For example, when the at least one processor 302 executes the computer program stored in the memory, it implements all or part of the steps of the smart charger charging method in a low-temperature environment described in this embodiment; or it implements all or part of the functions of the smart charger charging device in a low-temperature environment. The at least one processor 302 may be composed of integrated circuits, such as a single-packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips.

[0164] In some embodiments, the at least one communication bus 303 is configured to enable communication between the memory 301 and the at least one processor 302, etc. Although not shown, the smart charger 3 may also include a power supply (e.g., a battery) to power the various components. Preferably, the power supply can be logically connected to the at least one processor 302 via a power management device, thereby enabling functions such as charging, discharging, and power consumption management. The power supply may also include one or more DC or AC power supplies, a rechargeable power fault detection circuit, a power converter or inverter, a power status indicator, or any other components.

[0165] In some embodiments, the plurality of sensors 304 includes a temperature sensor and a wind speed sensor. The temperature sensor is disposed within the smart charger housing and the battery, while the wind speed sensor is disposed within the smart charger housing.

[0166] The smart charger 3 may also include a Bluetooth module, a Wi-Fi module, internal memory, a network interface, an input location, and a display screen, etc., which will not be described in detail here.

[0167] The integrated unit, implemented as a software functional module, can be stored in a computer-readable storage medium. This software functional module, stored in a storage medium, includes several instructions to cause a smart charger to execute portions of the methods described in the various embodiments of this application.

[0168] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and other division methods may be used in actual implementation.

[0169] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

Claims

1. A method for charging a smart terminal in a low-temperature environment, characterized in that, The method for charging smart terminals in low-temperature environments includes: When a charging signal is detected, it is determined whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold. When the real-time ambient temperature is lower than the preset low temperature threshold, a preheating current is output to preheat the battery; After the preheating starts and a preset first time period is reached, the real-time battery temperature and real-time wind speed intensity of the smart terminal are periodically acquired. The real-time battery temperature is compensated based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature. The charging parameters of the smart charger are adjusted based on the real-time temperature compensation, and the battery is charged based on the charging parameters. Among them, the battery material data includes the thermal conductivity of the battery sealing layer material, and the material data corresponding to the battery type is obtained by matching based on the pre-stored battery thermal conductivity data table. The step of compensating the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature includes: The delay coefficient is determined based on the real-time ambient temperature, the real-time wind speed and intensity, and the battery material data; The basic temperature conduction delay value is obtained based on the aforementioned delay coefficient and the preheating duration. Obtain the real-time power consumption current of the battery; The base temperature conduction delay value is corrected based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value. The real-time battery temperature is compensated based on the corrected temperature conduction delay value to obtain the real-time compensated temperature.

2. The method for charging a smart terminal in a low-temperature environment according to claim 1, characterized in that, The method of obtaining the basic temperature conduction delay value based on the delay coefficient and the preheating duration includes: Determine the thermal conduction reference time corresponding to the material data of the battery; The heat transfer efficiency is obtained based on the heat conduction reference time and the preheating duration. The basic temperature conduction delay value is obtained based on the delay coefficient and the heat transfer efficiency.

3. The method for charging a smart terminal in a low-temperature environment according to claim 1, characterized in that, The step of correcting the base temperature conduction delay value based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value includes: The power consumption correction factor is determined based on the real-time power consumption current. The wind speed correction factor is determined based on the real-time wind speed intensity. The base temperature conduction delay value is corrected based on the power consumption correction factor and the wind speed correction factor to obtain the corrected temperature conduction delay value.

4. The method for charging a smart terminal in a low-temperature environment according to claim 1, characterized in that, The process of adjusting the charging parameters of the smart charger based on the real-time temperature compensation and charging the battery based on the charging parameters includes: The real-time charging current and charging cutoff voltage are determined based on the real-time compensated temperature. The battery is charged based on the real-time charging current and the charging cutoff voltage.

5. The method for charging a smart terminal in a low-temperature environment according to any one of claims 1 to 4, characterized in that, The method for charging smart terminals in low-temperature environments also includes: After a preset second time period for preheating is initiated, the voltage rise value of the battery is acquired, where the preset second time period is shorter than the preset first time period. The voltage rise value is then compared to a preset voltage rise threshold. If the voltage rise value is less than the preset voltage rise threshold, a preheating current threshold is determined based on the battery's maximum allowable current. The preheating current is then increased to the preheating current threshold. The preheating current threshold is then output to preheat the battery. Alternatively... After a third preset time period following the start of preheating, the real-time temperature rise rate of the battery is acquired. This real-time temperature rise rate is compared with a preset first temperature rise rate threshold and a preset second temperature rise rate threshold. When the real-time temperature rise rate is less than the preset first temperature rise rate threshold, the preheating current is increased, and the increased preheating current is output to preheat the battery. When the real-time temperature rise rate is greater than the preset second temperature rise rate threshold, the preheating current is decreased, and the decreased preheating current is output to preheat the battery. When the real-time temperature rise rate is greater than the preset first temperature rise rate threshold and less than the preset second temperature rise rate threshold, the preheating current remains constant, and the preheating current is output to preheat the battery.

6. The method for charging a smart terminal in a low-temperature environment according to any one of claims 1 to 4, characterized in that, The method for charging smart terminals in low-temperature environments also includes: Send a status query message to the battery to obtain the real-time status data of the battery; Based on the real-time status data, determine whether the battery has any abnormal conditions; If an abnormal situation is detected, an alarm will be triggered.

7. A smart terminal charging device for low-temperature environments, characterized in that, The intelligent terminal charging device for low-temperature environments includes: The judgment module is used to determine whether the real-time ambient temperature of the smart terminal battery is lower than a preset low temperature threshold when a charging signal is detected. The heating module is used to output a preheating current to preheat the battery when the real-time ambient temperature is lower than the preset low temperature threshold. The acquisition module is used to periodically acquire the real-time battery temperature and real-time wind speed intensity of the smart terminal after the preheating starts and a preset first time period has elapsed. The compensation module is used to compensate the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data to obtain the real-time compensated temperature. The charging module is used to adjust the charging parameters of the smart charger based on the real-time temperature compensation, and to charge the battery based on the charging parameters. Among them, the battery material data includes the thermal conductivity of the battery sealing layer material, and the material data corresponding to the battery type is obtained by matching based on the pre-stored battery thermal conductivity data table. The compensation module compensates for the real-time battery temperature based on the real-time ambient temperature, the real-time wind speed intensity, and the battery material data, obtaining the real-time compensated temperature, including: The delay coefficient is determined based on the real-time ambient temperature, the real-time wind speed and intensity, and the battery material data; The basic temperature conduction delay value is obtained based on the aforementioned delay coefficient and the preheating duration. Obtain the real-time power consumption current of the battery; The base temperature conduction delay value is corrected based on the real-time power consumption current and the real-time wind speed intensity to obtain the corrected temperature conduction delay value. The real-time battery temperature is compensated based on the corrected temperature conduction delay value to obtain the real-time compensated temperature.

8. A smart charger, characterized in that, The smart charger includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements all or part of the steps of the smart terminal charging method in a low-temperature environment according to any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements all or part of the steps of the intelligent terminal charging method in a low-temperature environment according to any one of claims 1 to 6.

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