Power control method for energy storage device and related device

Abstract

The application provides a power control method of an energy storage device and a related device, relates to the technical field of energy storage devices, and aims to improve the safety and energy utilization efficiency of the energy storage device. The power control method comprises the following steps: acquiring the altitude of the energy storage device. When the altitude is greater than or equal to a first altitude threshold and less than or equal to a second altitude threshold, a power coefficient is determined based on the altitude, wherein the power coefficient is negatively correlated with the altitude. A target power upper limit value of the energy storage device is determined based on the power coefficient and a rated power limit value of the energy storage device. Since the power coefficient decreases with the increase of the altitude, and the target power upper limit value changes with the change of the power coefficient, the dynamic gradient derating is realized, the working temperature of the energy storage device is ensured to be within a safe temperature range, and thus the safety and energy utilization efficiency of the energy storage device are improved.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, specifically to a power control method and related equipment for energy storage equipment. Background Technology

[0002] Altitude has a significant impact on the safety of energy storage devices. Specifically, as altitude increases, air density decreases and atmospheric pressure drops. When operating at rated power, energy storage devices experience reduced electrical insulation and heat dissipation efficiency, leading to safety issues such as accelerated device aging, short circuits, and even fires, as well as decreased energy utilization. Therefore, current energy storage devices are not suitable for various high-altitude scenarios, posing safety risks and low energy efficiency. Summary of the Invention

[0003] This application provides a power control method for energy storage devices, an energy storage device, a computer-readable storage medium, and a computer program product, aiming to improve the safety and energy utilization efficiency of energy storage devices.

[0004] The first aspect of this application provides a power control method for an energy storage device. The method includes: acquiring the altitude of the energy storage device; determining a power coefficient based on the altitude when the altitude is greater than or equal to a first altitude threshold and less than or equal to a second altitude threshold, wherein the power coefficient is negatively correlated with the altitude; and determining a target power upper limit for the energy storage device based on the power coefficient and the rated power limit of the energy storage device.

[0005] It is understandable that when the altitude is greater than or equal to the first altitude threshold and less than or equal to the second altitude threshold, it indicates that the energy storage device is in a medium-altitude region. Since the power coefficient decreases with increasing altitude, and the target power upper limit changes with the power coefficient, "dynamic gradient derating" is achieved. That is, by precisely defining the altitude range where power adjustment is required, the operating power of the energy storage device in a high-altitude environment can be dynamically reduced. By adaptively adjusting the power coefficient based on altitude, the heat generation of the energy storage device is reduced, ensuring that the operating temperature of the energy storage device is within a safe temperature range. This fundamentally avoids the safety risks brought by the high-altitude environment, improves the stability and reliability of the energy storage device, and thus improves the safety and energy utilization efficiency of the energy storage device.

[0006] In one embodiment, the method further includes setting the rated power limit to the target power upper limit of the energy storage device when the altitude is less than a first altitude threshold.

[0007] It is understandable that when the altitude is less than the first altitude threshold, it means that the energy storage device is in a low-altitude area. The rated power limit of the energy storage device is set to the target power upper limit, thereby avoiding the energy storage device from being used at a reduced rate in low-altitude areas and thus improving the energy utilization efficiency of the energy storage device.

[0008] In another embodiment, the method further includes: when the altitude is greater than a second altitude threshold, setting a preset power limit as the target power upper limit of the energy storage device, wherein the preset power limit is less than or equal to the target power upper limit corresponding to the second altitude threshold.

[0009] It is understandable that when the altitude is greater than the second altitude threshold, it means that the energy storage device is in a high-altitude area. The preset power limit of the energy storage device is set to the target power upper limit, so that the energy storage device is used at a significantly reduced rate in high-altitude areas, thereby avoiding frequent triggering of the energy storage device's protection mechanism and improving the safety of the energy storage device.

[0010] In another embodiment, the method further includes: adjusting a first altitude threshold and a second altitude threshold based on the health status (SOH) of the energy storage device.

[0011] It is understandable that the State of Health (SOH) of an energy storage device is a comprehensive indicator used to assess factors such as the number of battery cycles, capacity decay rate, and internal resistance change, reflecting the health status of the energy storage device.

[0012] In another embodiment, correcting the first altitude threshold and the second altitude threshold based on the energy storage device's state of health (SOH) includes: when SOH is greater than or equal to the first SOH threshold, correcting the first and second altitude thresholds using a first correction coefficient; when SOH is less than the first SOH threshold but greater than or equal to the second SOH threshold, correcting the first and second altitude thresholds using a second correction coefficient; and when SOH is less than the second SOH threshold, correcting the first and second altitude thresholds using a third correction coefficient. Wherein, the first correction coefficient is greater than the second correction coefficient, and the second correction coefficient is greater than the third correction coefficient.

[0013] It is understandable that a correction coefficient is determined based on the State of Health (SOH) of the energy storage device, and the first and second altitude thresholds are then adjusted based on this correction coefficient. The correction coefficient is positively correlated with the SOH. The SOH reflects the health level of the energy storage device, and the health level reflects the lifespan of the energy storage device. Related technologies do not consider the impact of SOH on the environmental adaptability of energy storage devices, which may lead to accelerated aging of energy storage devices with decreased health levels operating at the original altitude threshold due to overload, or prevent healthy devices from fully utilizing their performance due to overly strict altitude thresholds. This application achieves differentiated control through a three-level correction coefficient. The larger the correction coefficient, the smaller the correction range for the altitude threshold. That is, when the health level is high, a wider non-derating altitude range is retained to ensure maximum operating performance of the energy storage device. As the health level decreases, this altitude range is gradually narrowed, enabling the device to adaptively operate in various altitude scenarios at different health stages.

[0014] In another embodiment, the energy storage device includes a positioning module and a communication module. Obtaining the altitude of the energy storage device includes: obtaining a first altitude based on the positioning module; establishing a communication connection with a terminal device through the communication module; and obtaining a second altitude sent by the terminal device based on the communication module. When the deviation between the first altitude and the second altitude is greater than a deviation threshold, the first altitude and the second altitude are weighted and fused to obtain the altitude of the energy storage device. The weight corresponding to the first altitude is greater than the weight corresponding to the second altitude.

[0015] It is understandable that when the deviation between the first and second altitudes is greater than the deviation threshold, it indicates that the altitude data from different sources are significantly different. By weighted and fused together the first and second altitudes, the accuracy of the altitude data can be improved.

[0016] In another embodiment, the method further includes: when the target power upper limit is greater than the current power upper limit of the energy storage device, determining a power recovery rate based on the difference between the target power upper limit and the current power upper limit and a preset recovery time. The current power upper limit is then adjusted to the target power upper limit based on the power recovery rate.

[0017] The power recovery rate can be understood as the rate at which the upper limit of the power storage device gradually increases as the altitude of the device decreases. A smooth transition in the upper limit of power can be achieved by controlling the power recovery rate, thus avoiding sudden changes in the upper limit.

[0018] A second aspect of this application provides an energy storage device including a memory and a processor, wherein the power control method provided in the first aspect is implemented when the processor executes computer instructions stored in the memory.

[0019] A third aspect of this application provides a computer-readable storage medium storing computer instructions thereon, which, when executed by a processor, implement the power control method provided in the first aspect.

[0020] A fourth aspect of this application provides a computer program product including computer instructions that, when executed by a processor, implement the power control method provided in the first aspect.

[0021] It is understood that the beneficial effects of the energy storage device provided in the second aspect of the embodiments of this application, the computer-readable storage medium provided in the third aspect, and the computer program product provided in the fourth aspect are substantially the same as the beneficial effects of the power control method provided in the first aspect, and will not be repeated here. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the software structure of an energy storage device provided in one embodiment.

[0023] Figure 2 This is a flowchart of a power dynamic allocation algorithm provided in one embodiment.

[0024] Figure 3 This is a schematic diagram of the target APP interface layout provided in one embodiment.

[0025] Figure 4 This is a flowchart of a derating strategy for a mobile energy storage device provided in one embodiment.

[0026] Figure 5 This is a flowchart of a de-rating strategy for residential energy storage devices provided in one embodiment.

[0027] Figure 6 This is a schematic diagram of the hardware structure of an energy storage device provided in one embodiment. Detailed Implementation

[0028] It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0029] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.

[0030] Some embodiments will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] In this application embodiment, energy storage devices may include mobile energy storage devices, residential energy storage devices, and commercial and industrial energy storage devices. Mobile energy storage devices refer to portable emergency power supplies that can be flexibly deployed and are plug-and-play, typically used in trailers, trucks, containers, outdoor camping, and other similar scenarios. For example, mobile energy storage devices may also include power banks. Residential energy storage devices refer to small, fixed energy storage systems designed for home users, typically integrated with rooftop solar power systems to improve self-consumption rates, reduce electricity costs, or serve as backup power. Commercial and industrial energy storage devices are energy storage devices used in large-scale power consumption scenarios at the enterprise or park level.

[0032] Energy storage devices need to be derating at higher altitudes to improve their safety. However, related technologies suffer from issues such as fixed derating strategies, lack of user awareness, limited synchronization mechanisms, and insufficient scenario adaptation. Fixed derating strategies refer to the use of a "static derating" mode, where the output power of the energy storage device is limited to a fixed preset power level when the altitude exceeds a pre-defined threshold; in other words, the power ceiling of the energy storage device is fixed. Lack of user awareness means that the power ceiling is displayed numerically, making it difficult for users to intuitively understand the impact of altitude changes on the device's output power. Limited synchronization mechanisms mean that data acquisition relies on the energy storage device's built-in sensors, lacking multi-source data fusion capabilities. Insufficient scenario adaptation means that the derating gradient has not been optimized for different application scenarios, leading to frequent triggering of the energy storage device's protection mechanisms at higher altitudes or lower energy utilization efficiency at lower altitudes.

[0033] Based on this, this application provides a power control method for energy storage devices, which balances the safety and energy utilization efficiency of energy storage devices by real-time monitoring of altitude data and dynamic adjustment of the upper limit of power of energy storage devices.

[0034] The power control method is described below in detail using the software system of energy storage equipment.

[0035] Figure 1 This is a schematic diagram of the software structure of an energy storage device provided in one embodiment.

[0036] The software system of energy storage devices can adopt a layered architecture, with layers communicating with each other via wired or wireless communication. For example... Figure 1 As shown, the software system of the energy storage device can be divided into four layers, from top to bottom: data acquisition layer, state mapping layer, decision execution layer, and interactive feedback layer.

[0037] The data acquisition layer is used for data acquisition and multi-source data fusion. The data acquisition layer may include a positioning module, a communication module, a multi-source data fusion module, and a sampling frequency control module.

[0038] The positioning module is used to obtain the initial altitude. This initial altitude can be obtained via a satellite positioning chip. The satellite positioning chip can be from the Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), BeiDou Navigation Satellite System (BDS), Quasi-Zenith Satellite System (QZSS), and / or Satellite Based Augmentation System (SBAS).

[0039] It is understandable that obtaining altitude through satellite positioning can include signal reception, pseudorange measurement, 3D positioning, altitude correction, and error control. The signal reception process involves receiving satellite signals from at least four satellites via an antenna, such as L1 / L2 band signals. These satellite signals contain satellite position and timestamp information. The pseudorange measurement process involves calculating the propagation time difference of the satellite signals and then calculating the satellite pseudorange based on this time difference and the speed of light. The satellite pseudorange includes atmospheric delay errors. The 3D positioning process involves solving the satellite pseudorange equations using the least squares method to obtain the latitude, longitude, and geodetic altitude of the energy storage device. The altitude correction process involves converting the geodetic altitude to altitude based on a geoid model (such as EGM96). The error control process involves reducing errors through differential positioning techniques or real-time dynamic positioning.

[0040] The communication module is used to obtain a second altitude. The communication module can establish a communication connection with the terminal device via a Wireless Fidelity (Wi-Fi) network or Bluetooth (BT) and receive the second altitude from the terminal device. Terminal devices include, but are not limited to, smartphones, tablets, PDAs, laptops, intelligent robots, and drones.

[0041] The multi-source data fusion module is used to fuse a first altitude and a second altitude to obtain the altitude of the energy storage device's location. Fusing the first and second altitudes can include: calculating the average of the first and second altitudes, or selecting either the first or second altitude based on the device type. For example, when the energy storage device is a mobile energy storage device, the second altitude is selected as the device's altitude. When the energy storage device is a residential energy storage device, the first altitude is selected as the device's altitude.

[0042] The sampling frequency control module controls the sampling frequency of the positioning module and / or communication module based on the altitude change rate. The altitude change rate is the ratio of the altitude difference to the duration within a preset time period. For example, when the altitude change rate is less than a first threshold, the sampling frequency of the positioning module and / or communication module is set to the first frequency. When the altitude change rate is greater than or equal to the first threshold and less than or equal to a second threshold, the sampling frequency is set to the second frequency. When the altitude change rate is greater than the second threshold, the sampling frequency is set to a third frequency. The first frequency is less than the second frequency, and the second frequency is less than the third frequency. That is, the sampling frequency of the positioning module and / or communication module increases as the altitude change accelerates. When the altitude change is slow, a lower sampling frequency is used. When the altitude change is rapid, a higher sampling frequency is used.

[0043] The state mapping layer is used to map altitude to the power ceiling of energy storage devices. The state mapping layer may include a scenario parameter configuration library and a dynamic power allocation algorithm.

[0044] The scenario parameter configuration library includes a series of scenario parameters, which may include a first altitude threshold (threshold_low), a second altitude threshold (threshold_high), a sensitivity coefficient (alpha), and a preset power limit. Among them, the sensitivity coefficient is used to measure the degree of influence of altitude on the upper limit of the power of energy storage devices.

[0045] The power dynamic allocation algorithm is used to determine the upper limit of the power of energy storage devices based on altitude and scenario parameters.

[0046] Figure 2 This is a flowchart of a power dynamic allocation algorithm provided in one embodiment.

[0047] like Figure 2 As shown, the power dynamic allocation algorithm may include the following steps: S101. Obtain the altitude of the energy storage device.

[0048] For example, the energy storage device can use relevant software applications to call the GPS and barometric pressure sensors built into the mobile terminal to measure the altitude of the energy storage device's location; or, when the mobile terminal (e.g., a mobile phone) is connected to the energy storage device, the user can manually input the corresponding altitude on the mobile terminal, and the mobile terminal will transmit the altitude input by the user to the energy storage device; or, when the mobile terminal (e.g., a mobile phone) is connected to the energy storage device, the mobile terminal transmits the altitude measured by the mobile terminal to the energy storage device; or, the energy storage device can obtain shared altitude data from other electronic devices in the same network through a shared GPS module, etc. The embodiments of this application do not limit the method of obtaining altitude.

[0049] S102. Determine whether the altitude is less than the first altitude threshold.

[0050] If yes, proceed to step S103; otherwise, proceed to step S104.

[0051] In this embodiment, when the altitude is less than the first altitude threshold, it indicates that the energy storage device is located in a low-altitude area.

[0052] S103. Set the rated power limit of the energy storage device to the target power upper limit.

[0053] The rated power limit of energy storage equipment, also known as the full power, refers to the maximum power that can be stably output under design conditions.

[0054] In this embodiment, when the energy storage device is located in a low-altitude area, the rated power limit of the energy storage device is set to the target power upper limit, thereby avoiding the energy storage device from being used at a reduced rate in low-altitude areas and thus improving the energy utilization efficiency of the energy storage device.

[0055] S104. Determine whether the altitude is greater than the second altitude threshold.

[0056] If yes, proceed to step S105; otherwise, proceed to steps S106-S107.

[0057] In this embodiment, when the altitude is greater than the second altitude threshold, it indicates that the energy storage device is located in a high-altitude area. When the altitude is greater than or equal to the first altitude threshold and less than or equal to the second altitude threshold, it indicates that the energy storage device is located in a medium-altitude area.

[0058] S105. Set the preset power limit of the energy storage device to the target power upper limit.

[0059] It is understood that the preset power limit is greater than or equal to the lower power limit (power_min) of the energy storage device, and less than or equal to the upper target power limit corresponding to the second altitude threshold.

[0060] The lower limit of the power of energy storage devices, also known as the minimum power, refers to the minimum power required to maintain operation under design conditions.

[0061] The upper limit of the target power corresponding to the second altitude threshold is negatively correlated with the sensitivity coefficient. For example, the upper limit of the target power corresponding to the second altitude threshold can be calculated by formula (1).

[0062] P H = power_full×(1 – a) (1) Among them, P H is the target power upper limit value corresponding to the second altitude threshold, power_full is the rated power limit, and a is the sensitivity coefficient.

[0063] In this embodiment, when the energy storage device is located at a high altitude, the preset power limit of the energy storage device is set to the target power limit, so that the energy storage device can be used at a significantly reduced rate at high altitudes, thereby avoiding frequent triggering of the energy storage device's protection mechanism and improving the safety of the energy storage device.

[0064] S106. Determine the power coefficient based on altitude.

[0065] The power coefficient is negatively correlated with altitude. For example, the power coefficient can be calculated using formula (2).

[0066] L = 1 – a×delta_h / delta_H (2) Where L is the power coefficient, a is the sensitivity coefficient, delta_h is the difference between altitude and the first altitude threshold, and delta_H is the difference between the second altitude threshold and the first altitude threshold.

[0067] S107. Determine the target power upper limit of the energy storage device based on the power factor and the rated power limit of the energy storage device.

[0068] The target power upper limit is positively correlated with the power coefficient. For example, the target power upper limit can be calculated using formula (3).

[0069] P = power_full × L (3) Where P is the target power limit, power_full is the rated power limit, and L is the power coefficient.

[0070] In this embodiment, when the energy storage device is located in a medium-altitude area, the target power upper limit is determined based on the altitude and the rated power limit of the energy storage device. The target power upper limit changes with the altitude, thereby achieving "dynamic gradient derating" and balancing the safety and energy utilization efficiency of the energy storage device.

[0071] The decision execution layer is used to optimize the de-rating strategy. The decision execution layer may include a dynamic threshold adjustment engine, a safety clipping module, and a power smoothing module.

[0072] The dynamic threshold adjustment engine is used to adjust scenario parameters based on the State of Health (SOH) of the energy storage device. The SOH of the energy storage device is a comprehensive indicator assessed by factors such as battery cycle count, capacity decay rate, and internal resistance change, reflecting the device's health status. The SOH can be read from the energy storage device's Battery Management System (BMS). In some embodiments, SOH is the ratio of the current actual capacity to the nominal capacity, and SOH is greater than or equal to 0 and less than or equal to 100%.

[0073] In this embodiment, adjusting the scenario parameters based on the State of Altitude (SOH) of the energy storage device may include: correcting a first altitude threshold and a second altitude threshold based on the SOH of the energy storage device. Specifically, a correction coefficient is determined based on the SOH of the energy storage device, and the first and second altitude thresholds are corrected based on the correction coefficient. The correction coefficient is positively correlated with the SOH. The larger the correction coefficient, the smaller the correction magnitude to the altitude threshold. The corrected altitude threshold is obtained by multiplying the baseline altitude threshold by the correction coefficient.

[0074] In one embodiment, when SOH is greater than or equal to a first SOH threshold, a first correction coefficient is used to correct the first altitude threshold and the second altitude threshold. When SOH is less than the first SOH threshold but greater than or equal to the second SOH threshold, a second correction coefficient is used to correct the first altitude threshold and the second altitude threshold. When SOH is less than the second SOH threshold, a third correction coefficient is used to correct the first altitude threshold and the second altitude threshold. The first correction coefficient is greater than the second correction coefficient, and the second correction coefficient is greater than the third correction coefficient.

[0075] Taking the correction of the first altitude threshold as an example, assuming the first altitude threshold is 3000 meters (m), the first SOH threshold is 80%, the second SOH threshold is 60%, the first correction coefficient is 1.0, the second correction coefficient is 0.9, and the third correction coefficient is 0.8. When SOH is greater than or equal to 80%, the corrected first altitude threshold is 3000 × 1.0, meaning the first altitude threshold remains unchanged. When SOH is less than 80% but greater than or equal to 60%, the corrected first altitude threshold is 3000 × 0.9, resulting in a corrected first altitude threshold of 2700m. When SOH is less than 60%, the corrected first altitude threshold is 3000 × 0.8, resulting in a corrected first altitude threshold of 2400m.

[0076] The safety punching module is used to optimize multi-source data fusion. Specifically, when the deviation between the first altitude and the second altitude is greater than the deviation threshold, the first altitude and the second altitude are weighted and fused to obtain the altitude of the energy storage device. Among them, the weight corresponding to the first altitude is greater than the weight corresponding to the second altitude. For example, the first altitude and the second altitude can be weighted and fused using formula (4).

[0077] H F = w1×H1+ w2×H2 (4) Among them, H F The weighted and merged altitudes are: H1 is the first altitude, w1 is the weight corresponding to the first altitude, H2 is the second altitude, and w2 is the weight corresponding to the second altitude.

[0078] In one embodiment, when the deviation between the first altitude and the second altitude is less than or equal to a deviation threshold, the first altitude and the second altitude are merged to obtain the altitude of the energy storage device. Merging the first altitude and the second altitude may include: calculating the average of the first altitude and the second altitude, or selecting either the first altitude or the second altitude based on the device type.

[0079] In another embodiment, when sampling at the first altitude fails multiple times consecutively, the weight corresponding to the first altitude is reduced; when sampling at the second altitude fails multiple times consecutively, the weight corresponding to the second altitude is reduced, in order to reduce interference from invalid data.

[0080] The power smoothing module is used to control the power recovery rate. The power recovery rate refers to the rate at which the upper limit of the energy storage device gradually increases as the altitude of the device decreases. A low-pass filtering algorithm can be used to smooth the upper limit of the power to avoid sudden changes.

[0081] In this embodiment, when the target power upper limit is greater than the current power upper limit of the energy storage device, the power recovery rate is determined based on the difference between the target power upper limit and the current power upper limit and a preset recovery time. The current power upper limit is then adjusted to the target power upper limit based on the power recovery rate. The power recovery rate satisfies the condition of formula (5).

[0082] V P ≤ (P_target – P_current) / T (5) Among them, V P The power recovery rate is defined by P_target, the target power limit, P_current, and the current power limit, with T being the preset recovery time.

[0083] It is understandable that, as the altitude of energy storage equipment decreases, the power recovery rate is controlled to achieve a smooth transition of the upper limit of power and avoid drastic power fluctuations.

[0084] The interactive feedback layer may include the target application (APP), which is used to control the energy storage device and interact with the user. The target APP may include a user interface module, a prompt module, and a data query module.

[0085] The interface module is used to display a visualization interface that shows the altitude-power curve in real time. The horizontal axis of the altitude-power curve corresponds to altitude, and the vertical axis corresponds to the upper limit of power. When the user clicks on a node on the altitude-power curve, the visualization interface displays the calculation process of the parameters corresponding to that node.

[0086] The prompt module is used to issue scenario-based prompts when changes in altitude trigger adjustments to the power limit. For example, when an energy storage device moves from a medium-altitude area to a higher-altitude area, the scenario-based prompt would be "Currently entering a higher-altitude area, the power limit has been intelligently adjusted."

[0087] The data query module provides historical data query functionality. When a user triggers the historical data query function, the target app can display or display adjustment data for the power limit value on a weekly or monthly basis.

[0088] Figure 3 This is a schematic diagram of the target APP interface layout provided in one embodiment.

[0089] like Figure 3 As shown, the target app's interface includes a function control area, a historical data area, and a real-time monitoring area.

[0090] The function control area provides configuration access for scene modes and protection switches. It may include a scene mode switching button, a high-altitude protection switch, and a data synchronization setting button. The scene mode switching button is used to switch scene modes, which may include mobile energy storage mode and residential energy storage mode. The high-altitude protection switch is used to enable or disable the dynamic power limit function. The data synchronization setting button is used to synchronize altitude data.

[0091] The historical data area is used to track adjustments to the power limit. This area may include an altitude change trend chart, a list of power adjustment records, and a query entry for details of a single adjustment. The altitude change trend chart displays altitude data by week or month. The power adjustment record list records the adjustments to the power limit. The query entry for details of a single adjustment allows users to view detailed data for that particular power limit adjustment.

[0092] The real-time monitoring area displays the altitude-power curve. The altitude-power curve includes multiple nodes, each with parameters including the current altitude, current power value, and a power limitation status label. The power limitation status label indicates the triggering reason and level of the current power limitation. For example, when the energy storage device is at a high altitude, the power limitation status label displays "High Altitude Protection in Progress," indicating that the power limitation has been triggered due to the high altitude. When the energy storage device's State of Health (SOH) is low, causing derating, the power limitation status label displays "Health Adjustment," indicating that the power limitation is not solely caused by altitude. When the energy storage device is not drated, the power limitation status label displays "Normal Output," indicating that the energy storage device is currently operating at full power. When the user clicks on the power limitation status label, a details pop-up window appears, displaying altitude data, health parameters, and the derating algorithm calculation process to enhance the user's understanding of the power limitation logic.

[0093] In this embodiment, the derating range is ranked from largest to smallest as significant derating, moderate derating, slight derating, and full power. Table 1 shows that the derating strategies differ across different scenario modes. Compared to residential energy storage, mobile energy storage exhibits greater derating in mid- and high-altitude regions. That is, mobile energy storage employs a more aggressive derating gradient, while residential energy storage uses a more gradual derating gradient.

[0094] Table 1. Comparison of descent strategies in different scenario modes The following describes the de-rating strategies for different types of energy storage devices in specific scenarios.

[0095] Scenario 1: Mobile energy storage devices are located in high-altitude areas.

[0096] Figure 4 This is a flowchart of a derating strategy for a mobile energy storage device provided in one embodiment.

[0097] like Figure 4 As shown, the derating strategy for mobile energy storage devices includes the following steps: S201. In response to the activation of the mobile energy storage mode, load the scenario parameters corresponding to the mobile energy storage mode.

[0098] For example, when a user selects the corresponding mobile energy storage mode on a mobile terminal, the energy storage device automatically schedules the altitude threshold, sensitivity coefficient, and preset power limit corresponding to the mobile energy storage mode.

[0099] S202. Obtain altitude based on positioning module.

[0100] In this embodiment, for the altitude obtained by satellite positioning, errors can be reduced through error correction processes such as ionospheric delay compensation, tropospheric refraction correction, and multipath effect filtering, so as to improve the accuracy of altitude data.

[0101] S203. Determine the upper limit of power based on altitude and scene parameters.

[0102] In this embodiment, a power dynamic allocation algorithm can be used to trigger a significant derating.

[0103] S204. Issue high-altitude protection alerts via the target app.

[0104] For example, the high altitude protection message reads, "The current altitude is high, and the power has been adjusted to a lower level to ensure equipment safety."

[0105] S205. Based on the gradual decrease in altitude, the upper limit of power is gradually increased.

[0106] In this embodiment, the upper limit of power can be gradually increased by controlling the power recovery rate.

[0107] In Scenario 1, mobile energy storage devices are used at significantly reduced capacity in high-altitude areas, thereby avoiding frequent triggering of the protection mechanisms of mobile energy storage devices and improving their safety.

[0108] Scenario 2: Residential energy storage equipment is located in a medium-altitude area.

[0109] Figure 5 This is a flowchart of a de-rating strategy for residential energy storage devices provided in one embodiment.

[0110] like Figure 5 As shown, the derated energy storage strategy for residential devices includes the following steps: S301, In response to the start of residential energy storage mode, load the scene parameters corresponding to residential energy storage mode.

[0111] For example, when a user selects the corresponding residential energy storage mode on a mobile terminal, the energy storage device automatically schedules the altitude threshold, sensitivity coefficient, and preset power limit corresponding to the residential energy storage mode.

[0112] S302. Obtain altitude based on communication module.

[0113] In this embodiment, a communication connection can be established with a local weather station based on the communication module to receive the altitude from the local weather station.

[0114] S303. Determine the upper limit of power based on altitude and scene parameters.

[0115] In this embodiment, a power dynamic allocation algorithm can be used to trigger a slight derating.

[0116] S304. Increase the upper limit of power based on the light intensity being greater than or equal to the light intensity threshold.

[0117] In this embodiment, the residential energy storage device can be set to a light priority mode. In response to the activation of the light priority mode, when the light intensity is greater than or equal to the light intensity threshold, it indicates that the light is sufficient. The energy utilization efficiency of the residential energy storage device is improved by using the power upper limit value.

[0118] In Scenario 2, residential energy storage devices are used with slight derating in medium-altitude areas, with the upper limit of power changing with altitude, thus achieving "dynamic gradient derating" and balancing the safety and energy efficiency of residential energy storage devices.

[0119] The above describes the power control method in conjunction with the software system of the energy storage device. The hardware structure of the energy storage device is briefly described below.

[0120] Figure 6 This is a schematic diagram of the hardware structure of an energy storage device provided in one embodiment.

[0121] like Figure 6 As shown, the energy storage device 100 includes a memory 110 and a processor 120. When the processor 120 executes the computer instructions stored in the memory 110, it implements the various functions or steps performed by the energy storage device in the above embodiments.

[0122] The memory 110 can be an external memory and / or an internal memory of the energy storage device 100. The memory 110 can be used to store computer instructions and / or programs. The processor 120 implements various functions of the energy storage device 100 by running or retrieving computer instructions and / or programs stored in the memory 110, and by calling data stored in the memory 110. The memory 110 may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as a target APP), and the data storage area may store data created based on the use of the energy storage device 100. Furthermore, the memory 110 may include non-volatile memory, such as a hard disk, RAM, plug-in hard disk, SmartMedia Card (SMC), Secure Digital (SD) card, Flash Card, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0123] The processor 120 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0124] The functions or steps performed by the energy storage device in the above embodiments can also be applied to chips, computer-readable storage media, or computer program products.

[0125] The chip includes a processor and an interface circuit, with the processor and interface circuit electrically connected. The interface circuit can read computer instructions stored in the memory and send the computer instructions to the processor. When the processor executes the computer instructions, it implements the various functions or steps performed by the energy storage device in the above embodiments.

[0126] The computer-readable storage medium stores computer instructions, which, when executed by a processor, implement the various functions or steps performed by the energy storage device in the above embodiments.

[0127] Computer-readable storage media include volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer-readable storage media include, but are not limited to, random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer.

[0128] The computer program product includes computer instructions, which, when executed by a processor, implement the various functions or steps performed by the energy storage device in the above embodiments.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A power control method for an energy storage device, characterized in that, The method includes: Obtain the altitude of the energy storage device; When the altitude is greater than or equal to a first altitude threshold and less than or equal to a second altitude threshold, a power coefficient is determined based on the altitude, wherein the power coefficient is negatively correlated with the altitude. The target power limit of the energy storage device is determined based on the power coefficient and the rated power limit of the energy storage device.

2. The method as described in claim 1, characterized in that, The method further includes: When the altitude is less than the first altitude threshold, the rated power limit is set as the target power upper limit of the energy storage device.

3. The method as described in claim 1, characterized in that, The method further includes: When the altitude is greater than the second altitude threshold, a preset power limit is set as the target power upper limit of the energy storage device, wherein the preset power limit is less than or equal to the target power upper limit corresponding to the second altitude threshold.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: The first altitude threshold and the second altitude threshold are adjusted based on the health status (SOH) of the energy storage device.

5. The method as described in claim 4, characterized in that, The step of correcting the first altitude threshold and the second altitude threshold based on the health status (SOH) of the energy storage device includes: When the SOH is greater than or equal to the first SOH threshold, the first altitude threshold and the second altitude threshold are corrected using the first correction coefficient. When the SOH is less than the first SOH threshold and greater than or equal to the second SOH threshold, the first altitude threshold and the second altitude threshold are corrected using a second correction coefficient. When the SOH is less than the second SOH threshold, the first altitude threshold and the second altitude threshold are corrected using a third correction factor. Wherein, the first correction coefficient is greater than the second correction coefficient, and the second correction coefficient is greater than the third correction coefficient.

6. The method according to any one of claims 1 to 5, characterized in that, The energy storage device includes a positioning module and a communication module. The step of obtaining the altitude of the energy storage device includes: The first altitude is obtained based on the positioning module; A communication connection is established with the terminal device through the communication module, and the second altitude sent by the terminal device is obtained based on the communication module; When the deviation between the first altitude and the second altitude is greater than the deviation threshold, the first altitude and the second altitude are weighted and fused to obtain the altitude of the energy storage device; wherein the weight corresponding to the first altitude is greater than the weight corresponding to the second altitude.

7. The method according to any one of claims 1 to 5, characterized in that, The method further includes: When the target power upper limit is greater than the current power upper limit of the energy storage device, the power recovery rate is determined based on the difference between the target power upper limit and the current power upper limit and the preset recovery time. The current power limit is adjusted to the target power limit based on the power recovery rate.

8. An energy storage device, characterized in that, It includes a processor and a memory, which implement the method as described in any one of claims 1 to 7 when the processor executes computer instructions stored in the memory.

9. A computer-readable storage medium, characterized in that, It stores computer instructions that, when executed by a processor, implement the method as described in any one of claims 1 to 7.

10. A computer program product, characterized in that, It includes computer instructions that, when executed by a processor, implement the method as described in any one of claims 1 to 7.

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