A battery voltage output control method, conversion device, equipment and medium
By dynamically controlling the voltage strategy through the conversion device between the battery and the load, the problem of voltage drop caused by the increased internal resistance of lithium-ion batteries at low temperatures is solved, the remaining capacity in the low voltage range of the battery is activated, and the low-temperature endurance and room-temperature power supply efficiency are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- POWER IDEA TECH (SHENZHEN) CO LTD
- Filing Date
- 2026-02-12
- Publication Date
- 2026-06-23
AI Technical Summary
In low-temperature environments, the internal resistance of lithium-ion batteries increases, causing the terminal voltage to drop rapidly. This results in a significant decrease in the capacity that portable electronic devices can release under the same discharge cutoff voltage conditions. Furthermore, the battery still has residual capacity in the low-voltage range that is difficult to utilize, leading to reduced battery life and low utilization of available capacity.
By setting up a conversion device between the battery and the load, the real-time status parameters of the battery and the power supply demand parameters of the load are collected, and the voltage control strategy is dynamically determined. The load is then selectively powered by direct power supply or voltage conversion path to activate the remaining capacity of the battery in the low voltage range and avoid the terminal from failing to turn on or automatically shutting down.
It improves the utilization rate of battery capacity and range in low-temperature scenarios, while reducing voltage conversion loss at room temperature, achieving a balance between high efficiency and low-temperature availability.
Smart Images
Figure CN122267973A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of battery technology, specifically to a battery voltage output control method, conversion device, equipment, and medium. Background Technology
[0002] The discharge voltage, release capacity, and internal resistance of lithium-ion batteries are highly sensitive to temperature. In low-temperature environments (such as below 0°C or even below -20°C), the battery's internal resistance increases significantly, and the terminal voltage drops rapidly under load, resulting in a substantial decrease in release capacity under the same discharge cutoff voltage. At the same time, the battery's usable capacity is often distributed more in the lower voltage range.
[0003] For portable electronic devices, the power management chip typically sets a minimum operating threshold for the input voltage. When the battery voltage is below this threshold, the device may fail to power on or shut down automatically. Even if the battery still has a significant amount of remaining capacity in the low-voltage range, it is difficult for the device to utilize it directly, resulting in a significant decrease in battery life and low utilization of available capacity in low-temperature environments.
[0004] In related technologies, improving the low-temperature power supply problem usually involves increasing battery capacity redundancy, using cell systems with better low-temperature performance, or introducing heating / insulation methods. However, these methods often increase volume, cost, or power consumption. In a power supply architecture where the battery is directly connected to the load, it is still difficult to simultaneously achieve high efficiency at room temperature and capacity utilization in the low-temperature and low-voltage range. Summary of the Invention
[0005] The main objective of this invention is to provide a battery voltage output control method, conversion device, equipment, and medium, aiming to at least solve the technical problems existing in related technologies.
[0006] A first aspect of the present invention provides a conversion device for use between a battery and a load terminal, the battery voltage output control method comprising: Collect real-time status parameters of the battery, including battery temperature and battery voltage; Obtain the load power demand parameters, including the minimum power supply voltage threshold for the load. Based on the real-time status parameters and the power supply demand parameters, a voltage control strategy is determined; The battery output voltage is controlled according to the voltage control strategy.
[0007] A second aspect of the present invention provides a conversion device, comprising: The acquisition module is used to acquire real-time status parameters of the battery, including battery temperature and battery voltage. The acquisition module is used to acquire the power supply requirement parameters of the load, including the minimum power supply voltage threshold of the load. The control module is used to determine the voltage control strategy based on the real-time status parameters and the power supply demand parameters; The output module is used to control the battery output voltage according to the voltage control strategy.
[0008] A third aspect of the present invention provides an electronic device, the electronic device including a memory, a processor, and a bus; the bus is used to realize connection and communication between the memory and the processor; the processor is used to execute a computer program stored in the memory; when the processor executes the computer program, it implements the steps of the battery voltage output control method of the first aspect.
[0009] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the battery voltage output control method of the first aspect.
[0010] The battery voltage output control method, conversion device, equipment, and medium of the present invention dynamically determine a suitable voltage control strategy by collecting real-time state parameters such as battery temperature and battery voltage and combining them with load-side power supply demand parameters. For example, when the battery is not at a low temperature and its voltage can meet the minimum operating voltage of the load, the battery supplies power to the load through a direct power supply path, thereby reducing conversion losses caused by voltage transformation and improving power supply efficiency under normal temperature conditions. When the battery is at a low temperature or its voltage drops to a level insufficient to meet the minimum operating voltage of the load, the battery outputs a voltage that meets the load's power supply demand through a voltage conversion path. Thus, this technical solution can avoid the phenomenon of the terminal failing to power on, automatically shutting down, or prematurely cutting off discharge due to excessively low battery voltage in low-temperature scenarios, activate and utilize the remaining capacity in the low-voltage range of the battery, improve the utilization rate of available capacity and battery life under low temperature conditions, and achieve a balance between high efficiency at normal temperature and availability at low temperature through strategy switching based on state parameters. Attached Figure Description
[0011] 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 only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This diagram illustrates the relationship between the discharge capacity and voltage of lithium-ion batteries at different temperatures in related technologies. Figure 2This is a schematic flowchart of the battery voltage output control method provided in the embodiments of this application; Figure 3 This is a schematic diagram of the module connections of the conversion device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the internal structure and connections of the electronic device provided in the embodiments of this application.
[0013] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0014] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0015] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0016] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "multiple" means two or more, unless otherwise explicitly specified. The term "comprising" indicates the presence of the described feature, whole, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or sets thereof. The term "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B may include three cases: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship.
[0017] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art; the terms used in the embodiments of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.
[0018] Furthermore, terms such as "exemplary," "for example," and "optional" are used to indicate illustrative purposes. Any technical solution described by the above terms in the embodiments of this application should not be construed as being more preferred or advantageous than other technical solutions. Specifically, these terms are intended to present the relevant technical concepts in terms of specific implementation methods.
[0019] The discharge capacity, internal resistance, and terminal voltage of lithium-ion batteries are significantly affected by temperature. In low-temperature environments (e.g., below 0°C, or even below -20°C), the battery's internal resistance rises rapidly, leading to a significant drop in terminal voltage under load and a noticeable decrease in release capacity. Furthermore, the lower the temperature, the greater the capacity loss under the same discharge cutoff voltage. For example, a battery that is nominally able to output approximately 2000mAh when discharged to 3.5V at 25°C may release almost no effective charge at -20°C if the cutoff voltage is still 3.5V; however, when the discharge cutoff voltage is lowered to 3.0V, it can still release approximately 1500mAh. This shows that at low temperatures, the usable capacity of the battery is concentrated in the lower voltage range, and the proportion of capacity in the higher voltage range decreases with decreasing temperature. Moreover, the voltage drop is more pronounced during high-current discharge. The relationship between the discharge capacity and voltage of lithium-ion batteries at different temperatures is shown below. Figure 1 As shown.
[0020] The aforementioned characteristics are detrimental to the low-temperature power supply of portable electronic terminals (especially low-power smart terminals): when a fully charged battery at room temperature is placed in a low-temperature environment such as -20°C, the terminal may automatically shut down or fail to power on. This is because most terminal power management chips have minimum operating requirements for input voltage. For example, mobile phone platform power ICs typically require a minimum input voltage greater than 3.4V. Below this voltage, the chip struggles to function properly, leading to the device's inability to operate. Even when the battery is below 3.4V, it may still retain a significant amount of remaining capacity (e.g., approximately 70% may still be available in the 3.4V to 2.75V range). However, because the voltage in this range is insufficient to meet the terminal's minimum power supply voltage requirements, this portion of the energy cannot be effectively utilized by the terminal.
[0021] To address the technical issues in related technologies, such as the inability of the terminal to power on, automatic shutdown, or premature termination of discharge due to excessively low battery terminal voltage in low-temperature scenarios, please refer to [link to relevant documentation]. Figure 2 This embodiment provides a battery voltage output control method.
[0022] The battery voltage output control method is executed by a conversion device disposed between the battery and the load terminal, and includes the following steps: Step S101: Collect real-time status parameters of the battery.
[0023] Specifically, the conversion device collects battery temperature T and battery voltage Vbat at preset detection times. These real-time status parameters include at least the current battery temperature T and battery voltage Vbat.
[0024] In one optional implementation, collecting the real-time status parameters of the battery includes: within a preset sampling window W = [t] s , t e 】(t s To use the initial time of the window, t e The first sampling sequence of battery temperature change over time (at the end of the sampling window) is collected with a sampling period Δt. The second sampling sequence of battery voltage changes over time ;in, At least one preprocessing operation is performed on the first and second sampled sequences respectively to generate real-time state parameters. The preprocessing operations include filtering, denoising, calibration, resampling, or normalization. For example, the filtering includes performing a moving average on the temperature or voltage sequence. (in for or (M is the window length), normalization includes Calibration includes (where a and b are preset calibration coefficients), resampling includes generating a new sequence {xj} from the original sampled sequence according to the target sampling period Δt′ (achieved through interpolation or extraction).
[0025] It should be noted that the conversion device includes: a status acquisition unit, a mode switching and control unit, a direct power supply path, and a voltage conversion path. The status acquisition unit is used to acquire battery temperature and battery voltage. The battery temperature can be obtained by a temperature sensor attached to the surface of the battery cell or inside the battery pack, and the battery voltage can be obtained by a sampling voltage divider circuit in conjunction with an analog-to-digital converter. The mode switching and control unit can be implemented by a low-power power management chip (PMIC) or a microcontroller. The direct power supply path includes a bypass switch, which can be implemented by a MOSFET with low on-resistance to form a low-impedance path from the battery to the load in direct mode. The voltage conversion path is a DC-DC voltage conversion circuit, which in some implementations is a boost DC / DC circuit, including an inductor, a power switch, a rectifier (or a synchronous rectifier MOSFET), and an output capacitor, used to convert the battery voltage into an output voltage that meets the power supply requirements of the load.
[0026] Step S102: Obtain the power supply requirements parameters of the load.
[0027] Specifically, the power supply requirement parameter can be the minimum supply voltage threshold Vload_min for the load. That is, the conversion device obtains the minimum supply voltage threshold Vload_min, which can be pre-stored in the conversion device, configured and sent by the load end through a communication interface, or mapped by the control unit according to the load type / operating level. If the load end also has a target supply voltage value Vout_req, the control unit can further obtain the target supply voltage value Vout_req for the closed-loop setting of the voltage conversion path.
[0028] Step S103: Determine the voltage control strategy based on real-time status parameters and power supply demand parameters.
[0029] Specifically, the conversion device determines whether "low temperature affects voltage output" is possible based on the battery temperature T and battery voltage Vbat in the real-time status parameters, and the minimum load supply voltage threshold Vload_min in the power supply demand parameters, and then determines an appropriate voltage control strategy according to different situations.
[0030] Optionally, the voltage control strategy includes a direct output strategy (the strategy selected when low temperature does not affect the voltage output) or a voltage conversion output strategy (the strategy selected when low temperature affects the voltage output).
[0031] For example, when the battery temperature meets the non-low temperature condition (e.g., T is not lower than T_th) and the battery voltage can meet the minimum supply voltage requirement of the load (e.g., Vbat is not lower than Vload_min), the voltage control strategy is determined to be a direct output strategy; when the battery temperature is at a low temperature condition (e.g., T is lower than T_th) and / or the battery voltage is insufficient to meet the minimum supply voltage requirement of the load (e.g., Vbat is lower than Vload_min), the voltage control strategy is determined to be a voltage conversion output strategy.
[0032] In some alternative implementations, the preset temperature threshold T_th can be a fixed threshold; in other implementations, the preset temperature threshold T_th can be dynamically updated according to the battery status and load power supply requirements, thereby increasing the sensitivity of the voltage conversion strategy when the load demand is high or the battery voltage margin is small, thus improving the power supply availability in low-temperature scenarios.
[0033] Step S104: Control the battery output voltage according to the voltage control strategy.
[0034] On the one hand, when the voltage control strategy is determined to be a direct output strategy (indicating that the battery temperature meets the non-low temperature operating conditions and the battery voltage can meet the minimum supply voltage requirement of the load), the conversion device drives the bypass switch to close, making the direct power supply path open; at the same time, the voltage conversion path is put into a non-operating state (power switch is turned off, drive is stopped, or low power consumption is entered). At this time, the load end obtains the output voltage provided by the battery through the low impedance path, thereby reducing the switching loss and conversion loss generated by voltage conversion, and improving the power supply efficiency and battery life in the normal temperature / high voltage range.
[0035] On the other hand, when the voltage control strategy determines the voltage conversion output strategy (indicating that the battery temperature is low and / or the battery voltage is insufficient to meet the minimum supply voltage requirement of the load), the bypass switch is turned off, disconnecting or controlling the direct power supply path, and the voltage conversion path is activated to convert the voltage of Vbat to output Vout that meets the power supply requirements of the load. In the boost implementation, the control unit controls the energy conversion between the power switching transistor and the inductor through PWM, and performs closed-loop regulation of Vout through output feedback to ensure that Vout is not lower than Vload_min, or stabilizes at the target supply voltage Vout_req. To avoid switching shocks, soft start, current limiting ramp-up, and output capacitor pre-charging can be used during mode switching to improve system stability.
[0036] As can be seen, the battery voltage output control method of this application dynamically determines a suitable voltage control strategy by collecting real-time state parameters such as battery temperature and battery voltage and combining them with the power supply demand parameters of the load end. This allows for selectively increasing the output voltage of the conversion device to meet the power demand of the load end. For example, when the battery is not at a low temperature and its voltage can meet the minimum operating voltage of the load, the battery supplies power to the load through a direct power supply path, thereby reducing the conversion loss caused by voltage conversion and improving the power supply efficiency under normal temperature conditions. When the battery is at a low temperature or its voltage drops to a level insufficient to meet the minimum operating voltage of the load, the battery outputs a voltage that meets the power supply demand of the load through a voltage conversion path. Thus, this technical solution can avoid the phenomenon of the terminal failing to power on, automatically shutting down, or prematurely cutting off discharge due to excessively low battery voltage in low-temperature scenarios. It activates and utilizes the remaining capacity in the low-voltage range of the battery, improving the utilization rate of available capacity and battery life under low temperature conditions. At the same time, it achieves a balance between high efficiency at normal temperature and availability at low temperature through strategy switching based on state parameters.
[0037] In an optional embodiment of this application, a target control strategy is determined based on real-time status parameters and power demand parameters, including: The battery temperature T is compared with a preset temperature threshold T_th to obtain a first comparison result, and the battery voltage Vbat is compared with the minimum supply voltage threshold Vload_min to obtain a second comparison result. A voltage control strategy is determined based on the first and second comparison results. The first comparison result characterizes whether the battery is currently in a temperature range significantly affected by low temperatures, and the second comparison result characterizes the degree to which the battery terminal voltage meets the minimum supply voltage requirement of the load.
[0038] This implementation method introduces both temperature and voltage criteria for joint judgment: temperature comparison reflects the likelihood and severity of low-temperature effects such as increased internal resistance and intensified polarization in the current environment; voltage comparison characterizes the battery's immediate ability to meet the minimum supply voltage of the load and its voltage margin. By jointly analyzing the results of these two types of comparisons, rather than relying solely on a single temperature or voltage condition, more realistic strategy selections can be made in different scenarios such as "temperature is already low but voltage still has margin" and "temperature is normal but voltage is insufficient due to discharge / load impact," thereby reducing the risk of misjudgment and frequent switching, improving the stability of output power supply, and balancing conversion efficiency and range performance while meeting power supply requirements.
[0039] In an optional embodiment of this application, determining the voltage control strategy based on the first comparison result and the second comparison result includes: When the first comparison result is that the battery temperature T is greater than or equal to the preset temperature threshold T_th, and the second comparison result is that the battery voltage Vbat is greater than or equal to the minimum power supply voltage threshold of the load, the voltage control strategy is determined to be a direct output strategy; when the first comparison result is that the battery temperature T is less than the preset temperature threshold T_th, and the second comparison result is that the battery voltage Vbat is less than the minimum power supply voltage threshold of the load, the voltage control strategy is determined to be a voltage conversion output strategy.
[0040] For example, when the first comparison result is T≥T_th and the second comparison result is Vbat≥Vload_min, it indicates that the battery temperature meets the non-low temperature operating conditions and the battery voltage can meet the minimum power supply voltage requirement of the load. The voltage control strategy is determined to be a direct output strategy so that the battery supplies power to the load through the direct power supply path. When the first comparison result is T<T_th and / or the second comparison result is Vbat<Vload_min, it indicates that the battery temperature is at a low temperature and / or the battery voltage is insufficient to meet the minimum power supply voltage requirement of the load. The voltage control strategy is determined to be a voltage conversion output strategy so that the battery voltage is converted through the voltage conversion path and an output voltage that meets the power supply requirements is output to the load.
[0041] Furthermore, to avoid frequent policy switching, some implementations may introduce hysteresis or persistence criteria, such as setting different temperature and / or voltage thresholds for entry and exit thresholds, or requiring the comparison results to meet preset conditions for a preset duration before policy switching is performed.
[0042] In an optional embodiment of this application, controlling the battery output voltage according to the voltage control strategy includes: when the voltage control strategy is determined to be a direct output strategy, controlling the conversion device to conduct the direct power supply path from the battery to the load and keeping the voltage conversion path in a non-working state, so as to output an output voltage related to the battery voltage to the load; when the voltage control strategy is determined to be a voltage conversion output strategy, controlling the conversion device to disconnect or controllably shut down the direct power supply path and keep the voltage conversion path working, performing voltage conversion on the battery voltage to output an output voltage that meets the power supply requirements parameters to the load. In one scenario: when the voltage control strategy is determined to be a direct output strategy, the conversion device turns on the direct power supply path from the battery to the load and puts the voltage conversion path in a non-operating state (e.g., stops driving the voltage conversion path and / or turns off the relevant power devices), so that the load end obtains an output voltage related to the battery terminal voltage, thereby reducing the conversion loss caused by voltage conversion. In another scenario: when the voltage control strategy is determined to be a voltage conversion output strategy, the control conversion device disconnects or controls the shutdown of the direct power supply path, while simultaneously enabling the voltage conversion path to operate, converting the battery voltage and outputting an output voltage that meets the power supply requirements parameters to the load.
[0043] In some implementations, the voltage conversion path is regulated based on output feedback to ensure that the output voltage meets and remains stable to the minimum supply voltage requirement of the load, thereby improving terminal availability and reducing shutdowns or inability to power on due to insufficient voltage in low-temperature or battery voltage conditions.
[0044] In an optional embodiment of this application, the power supply requirement parameter further includes the target power supply voltage value Vout_req for the load. After controlling the battery output voltage according to the voltage control strategy, the method further includes: The output voltage Vout at the output terminal of the detection converter is compared with the target supply voltage Vout_req of the load. When the difference C between the target supply voltage Vout_req of the load and the output voltage Vout is greater than the preset voltage deviation threshold ΔV, the output compensation control strategy is executed.
[0045] Specifically, when the difference C is greater than the preset voltage deviation threshold ΔV, it is determined that the current output voltage does not meet the target power supply requirements, and an output compensation control strategy is executed to bring the output voltage to converge within the allowable deviation range that meets the target power supply voltage value of the load. The output compensation control strategy includes at least one of the following: adjusting the control parameters of the voltage conversion path to improve or correct the output voltage (e.g., adjusting the duty cycle, switching frequency, current limiting threshold, or feedback reference value), and triggering a switch to the voltage conversion output strategy or increasing the target setting of the voltage conversion output under the direct output strategy. The output voltage Vout can be repeatedly detected after compensation until the difference C is not greater than the voltage deviation threshold ΔV or the preset compensation termination condition is met.
[0046] In an optional embodiment of this application, the load-side power supply requirement parameter further includes an estimated power supply duration (used to characterize the time required for the load to continuously obtain a stable power supply in the current operating state, such as the duration of maintaining power-on, completing a certain task, or maintaining a certain functional mode). Before determining the voltage control strategy based on the real-time status parameters and the power supply requirement parameter, the method further includes: determining a preset temperature threshold T_th based on the estimated power supply duration, the real-time status parameters of the battery, and the load-side power supply requirement parameter.
[0047] The process of determining the preset temperature threshold T_th can be understood as follows: taking into account both the risk of voltage drop due to increased battery internal resistance under the current temperature conditions and the load's continuous requirement to meet the minimum supply voltage within the estimated power supply duration, the temperature criterion required to enter low-temperature compensation (e.g., voltage conversion output) is adaptively set.
[0048] For example, when the estimated power supply duration is long and / or the minimum supply voltage threshold of the load is high, the preset temperature threshold can be increased accordingly, allowing the conversion device to enter the voltage conversion output strategy earlier to ensure long-term stable power supply. When the estimated power supply duration is short and / or the battery voltage margin is large, the preset temperature threshold can be decreased accordingly, allowing the conversion device to preferentially use direct output to reduce conversion losses. The preset temperature threshold T_th can be determined based on preset algorithm rules, segmented mapping, or lookup tables, and can be updated according to the estimated power supply duration and the real-time status parameters to improve the adaptability of the strategy determination and the reliability of power supply.
[0049] Figure 3 An embodiment of the present invention provides a conversion device, comprising: The acquisition module 301 is used to acquire the real-time status parameters of the battery, including the battery temperature T and the battery voltage Vbat. The acquisition module 302 is used to acquire the power supply requirement parameters of the load side, including the minimum power supply voltage threshold Vload_min of the load. Control module 303 is used to determine the voltage control strategy based on real-time status parameters and power supply demand parameters; Output module 304 is used to control the battery output voltage according to a voltage control strategy.
[0050] The conversion device of this application embodiment can establish an adaptive output control mechanism based on battery temperature and battery voltage between the battery and the load: the acquisition module obtains the battery status in real time, the acquisition module obtains the minimum power supply voltage requirement of the load, the control module determines and switches between two output strategies: direct power supply and voltage conversion. The output module implements power supply according to the strategy, so that when the low temperature or the battery voltage drops and the direct power supply cannot meet the minimum operating voltage of the load, the voltage conversion is activated in time to provide the required output voltage to the load, avoiding the terminal from failing to power on, automatically shutting down, or prematurely stopping discharge; at the same time, when the temperature is suitable and the battery voltage margin is sufficient, direct power supply is used to reduce the conversion loss caused by voltage conversion, improve the power supply efficiency and battery life under normal temperature conditions, and thus achieve a balance between low temperature availability and high efficiency at normal temperature, and improve the availability of battery capacity in the low voltage range.
[0051] Figure 4 An electronic device provided by an embodiment of the present invention is shown. This electronic device can be used to implement the battery voltage output control method in any of the foregoing embodiments. The electronic device includes: The system includes a memory 401, a processor 402, a bus 403, and a computer program stored on the memory 401 and executable on the processor 402. The memory 401 and the processor 402 are connected via the bus 403. When the processor 402 executes the computer program, it implements the battery voltage output control method described in the foregoing embodiments. The number of processors can be one or more.
[0052] The memory 401 can be a high-speed random access memory (RAM) or a non-volatile memory, such as a disk storage device. The memory 401 is used to store executable program code, and the processor 402 is coupled to the memory 401.
[0053] Furthermore, embodiments of this application also provide a computer-readable storage medium, which may be disposed in the electronic device in the above embodiments, and the computer-readable storage medium may be a memory.
[0054] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the battery voltage output control method described in the foregoing embodiments. Furthermore, the computer-readable storage medium can also be a USB flash drive, a portable hard drive, a read-only memory (ROM), RAM, a magnetic disk, or an optical disk, or any other medium capable of storing program code.
[0055] 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 in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.
[0056] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0057] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.
[0058] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.
[0059] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.
[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0061] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.
Claims
1. A battery voltage output control method, characterized in that, Applied to a conversion device, the conversion device being disposed between a battery and a load terminal, the battery voltage output control method includes: Collect real-time status parameters of the battery; wherein, the real-time status parameters include battery temperature and battery voltage; Obtain the power supply requirement parameters of the load; wherein, the power supply requirement parameters include the minimum power supply voltage threshold of the load; Based on the real-time status parameters and the power supply demand parameters, a voltage control strategy is determined; The battery output voltage is controlled according to the voltage control strategy.
2. The battery voltage output control method as described in claim 1, characterized in that, The voltage control strategy includes a direct output strategy or a voltage conversion output strategy; The step of determining the target control strategy based on the real-time status parameters and the power demand parameters includes: The battery temperature is compared with the preset temperature threshold to obtain a first comparison result, and the battery voltage is compared with the minimum power supply voltage threshold of the load to obtain a second comparison result; The voltage control strategy is determined based on the first comparison result and the second comparison result.
3. The battery voltage output control method as described in claim 2, characterized in that, The step of determining the voltage control strategy based on the first comparison result and the second comparison result includes: When the first comparison result is that the battery temperature is greater than or equal to a preset temperature threshold, and the second comparison result is that the battery voltage is greater than or equal to the minimum power supply voltage threshold of the load, the voltage control strategy is determined to be a direct output strategy. When the first comparison result is that the battery temperature is less than a preset temperature threshold, and / or the second comparison result is that the battery voltage is less than the minimum power supply voltage threshold of the load, the voltage control strategy is determined to be a voltage conversion output strategy.
4. The battery voltage output control method as described in claim 3, characterized in that, The step of controlling the battery output voltage according to the voltage control strategy includes: When the voltage control strategy is determined to be the direct output strategy, the conversion device is controlled to turn on the direct power supply path from the battery to the load and the voltage conversion path is put into a non-working state so as to output an output voltage related to the battery voltage to the load. When the voltage conversion output strategy is determined, the conversion device is controlled to disconnect or controllably shut down the direct power supply path and activate the voltage conversion path to convert the battery voltage and output an output voltage that meets the power supply requirements to the load.
5. The battery voltage output control method as described in claim 2, characterized in that, The power supply requirement parameters also include the target power supply voltage value for the load; After controlling the battery output voltage according to the voltage control strategy, the method further includes: Detect the output voltage at the output terminal of the conversion device; The output voltage is compared with the target supply voltage value of the load; When the difference between the target supply voltage of the load and the output voltage is greater than a preset voltage deviation threshold, the output compensation control strategy is executed.
6. The battery voltage output control method as described in claim 1, characterized in that, The load-side power supply requirement parameters also include the estimated power supply duration and the external power supply environment temperature. Before determining the voltage control strategy based on the real-time status parameters and the power supply demand parameters, the method further includes: The preset temperature threshold is determined based on the estimated power supply duration, the external power supply environment temperature, the real-time status parameters of the battery, and the power supply demand parameters of the load.
7. The battery voltage output control method according to any one of claims 1 to 6, characterized in that, The real-time status parameters of the acquired battery include: Within a preset sampling window, acquire a first sampling sequence of battery temperature changing over time and a second sampling sequence of battery voltage changing over time; At least one preprocessing operation is performed on the first sampling sequence and the second sampling sequence respectively to generate real-time state parameters; wherein the preprocessing operation includes filtering, denoising, calibration, resampling or normalization.
8. A conversion device, characterized in that, include: The acquisition module is used to acquire real-time status parameters of the battery, including battery temperature and battery voltage. The acquisition module is used to acquire the power supply requirement parameters of the load, including the minimum power supply voltage threshold of the load. The control module is used to determine the voltage control strategy based on the real-time status parameters and the power supply demand parameters; The output module is used to control the battery output voltage according to the voltage control strategy.
9. An electronic device, characterized in that, Includes memory, processor, and bus; The bus is used to enable communication between the memory and the processor; The processor is used to execute computer programs stored in the memory; When the processor executes the computer program, it implements the steps in the battery voltage output control method according to any one of claims 1 to 7.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps in the battery voltage output control method according to any one of claims 1 to 7.