Power level determination method, energy storage power supply, and computer readable storage medium

Abstract

A power level determination method, an energy storage power supply (100), and a computer readable storage medium (500). The power level determination method comprises: (011) on the basis of a preset charge and discharge energy table and operating parameters of an energy storage power supply, determining a stored energy upper limit of the energy storage power supply; (012) on the basis of charge and discharge parameters of the energy storage power supply, calculating charge and discharge energy; and (013) on the basis of the charge and discharge energy and the stored energy upper limit, determining the current power level of the energy storage power supply.

Description

Methods for determining energy capacity, energy storage power sources, and computer-readable storage media

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202410669138.4, filed with the China National Intellectual Property Administration on May 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a method for determining battery capacity, an energy storage power source, and a computer-readable storage medium. Background Technology

[0004] Mobile energy storage products have wide applications in outdoor activities, wilderness rescue, and emergency disaster relief. The chargeable and discharge capacities of energy storage power sources are affected by factors such as the operating environment. Therefore, the inventors realized that determining the amount of electricity based on the capacity of the energy storage power source has low accuracy. Summary of the Invention

[0005] This application provides a method for determining energy level, an energy storage power source, and a computer-readable storage medium. Based on the energy of the energy storage power source and taking into full account the impact of the operating environment of the energy storage power source, the method determines the energy level with high accuracy.

[0006] This application provides a method for determining power capacity, the method comprising: determining the upper limit of the energy storage capacity of the energy storage power supply based on a preset charge / discharge energy meter and the operating parameters of the energy storage power supply; calculating the charge / discharge energy based on the charge / discharge parameters of the energy storage power supply; and determining the current power capacity of the energy storage power supply based on the charge / discharge energy and the upper limit of the energy storage capacity.

[0007] This application also provides an energy storage power supply, including: a processor and a memory; wherein, the memory stores a computer program, the computer program is executed by the processor, and the computer program includes instructions for executing the power determination method described in any of the above embodiments.

[0008] This application also provides a computer-readable storage medium containing a computer program, which, when executed by a processor, causes the processor to perform the power determination method described in any of the above embodiments.

[0009] The energy determination method, energy storage power supply, and computer-readable storage medium of this application determine the energy level of the energy storage power supply based on the ratio of the current energy of the energy storage power supply to the upper limit of the energy storage capacity of the energy storage power supply, thereby enabling higher accuracy in energy level determination.

[0010] Additional aspects and advantages of the embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0011] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0012] Figure 1 is a schematic diagram of a scenario of the power determination method according to some embodiments of this application;

[0013] Figure 2 is a flowchart illustrating a method for determining battery power according to certain embodiments of this application;

[0014] Figure 3 is a flowchart illustrating a method for determining battery power according to certain embodiments of this application;

[0015] Figure 4 is a flowchart illustrating a method for determining battery power according to certain embodiments of this application;

[0016] Figure 5 is a schematic diagram of a scenario for a method for determining battery power according to certain embodiments of this application;

[0017] Figure 6 is a flowchart illustrating a method for determining battery power according to certain embodiments of this application;

[0018] Figure 7 is a schematic diagram of a scenario for a method for determining battery power according to certain embodiments of this application;

[0019] Figure 8 is a flowchart illustrating a method for determining battery power according to certain embodiments of this application;

[0020] Figure 9 is a schematic diagram of a scenario for a method for determining battery power according to certain embodiments of this application;

[0021] Figure 10 is a flowchart illustrating a method for determining electrical energy according to certain embodiments of this application;

[0022] Figure 11 is a schematic diagram of the connection state between a non-volatile computer-readable storage medium and a processor according to certain embodiments of this application;

[0023] Figure 12 is a schematic diagram of the power determination device according to some embodiments of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Furthermore, 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 at least one feature. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0027] The application scenarios of the technical solution of this application will be introduced below. The power determination method provided by this application can be applied to the application scenario shown in Figure 1, that is, it can be applied to the energy storage power supply 100 or the server 200.

[0028] The energy storage power supply 100 includes a battery module 10, a discharge interface 20, a charging interface 30, electrical components 40, and a controller 60.

[0029] The battery module 10 can be a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery module 10 mentioned in this application can include individual battery cells, battery modules, or battery packs.

[0030] A single battery cell is the smallest unit that makes up the energy storage power supply 100, and it can independently perform the functions of charging and discharging. The single battery cell 10 can be cylindrical, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this respect. When there are multiple single battery cells, the multiple single battery cells are connected in series, parallel, or mixed through a busbar component.

[0031] In some embodiments, the battery module 10 can be a battery module; when there are multiple individual cells, the multiple individual cells are arranged and fixed to form a battery module.

[0032] In some embodiments, the battery module 10 can be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed in the housing.

[0033] The discharge interface 20 is an interface for supplying power to external devices. The discharge interface 20 can be a car charger interface, a USB interface (such as a USB-A interface, USB-C interface, etc.), a Type-C interface, etc. The car charger interface is specifically designed to supply power to the vehicle's electronic components in the vehicle-mounted energy storage power supply 100.

[0034] Optionally, each discharge interface 20 may include one or more, and the interface types of multiple discharge interfaces 20 may be the same or different, which can be set according to actual needs.

[0035] The charging port 30 is an interface for charging the energy storage power source. The charging port 30 can be a USB interface (such as a USB-A interface, USB-C interface, etc.), a Type-C interface, a Lightning interface, a DC power interface, etc.

[0036] The power supply component 40 includes indicator lights (for indicating information), a display screen (for displaying the operating status information of the energy storage power supply 100 (such as remaining power, current supply voltage, etc.)), and a communication module (such as a Bluetooth communication module or a Wi-Fi communication module), etc., to assist users in using the energy storage power supply 100.

[0037] The controller 60 can be a microcontroller unit (MCU), control circuit, etc.

[0038] The controller 60 is also connected to various components (such as individual battery cells 10, discharge interface 20, power-consuming components 40, etc.) to obtain relevant information about each component or to control each component, thereby controlling the charging and discharging of the energy storage power supply 100.

[0039] To address the aforementioned technical problems, this application provides a method for determining battery power, which will be described in detail below:

[0040] Please refer to Figure 2. An embodiment of this application provides a method for determining battery power, the method including:

[0041] Step 011: Based on the preset charge and discharge energy meter and the operating parameters of the energy storage power supply, determine the upper limit of the energy storage power supply. The charge and discharge energy meter includes the upper limit of the energy storage power supply under different operating parameters.

[0042] Optionally, the preset charge / discharge energy table represents the upper limit of energy that the energy storage power supply can store at full charge and the upper limit of energy that can be released from full charge to 0% charge under different operating parameters. Given the specific operating parameters of the energy storage power supply during charging, the energy that can be stored at full charge can be determined based on the charge / discharge energy table. Similarly, given the specific operating parameters of the energy storage power supply during discharging, the energy that can be released from full charge to 0% charge can be determined based on the charge / discharge energy table.

[0043] Optionally, the upper limit of energy storage can be the upper limit of the energy that the energy storage power supply can store when fully charged, or it can be the upper limit of the energy that the energy storage power supply can release when discharged from full charge to 0% charge.

[0044] Specifically, since the upper limit of energy storage capacity of an energy storage power source is affected by its operating parameters, the upper limit may differ under different operating parameters. Therefore, it is necessary to determine the upper limit of energy storage capacity based on the specific operating parameters of the energy storage power source.

[0045] Obtain the operating parameters of the energy storage power source, including charging power, charging voltage, charging current, discharging power, discharging voltage, discharging current, and the ambient temperature in which the energy storage power source operates. Based on these operating parameters, the upper limit of the energy storage power source's energy capacity can be determined. For example, when the energy storage power source is charging, based on its operating parameters and the charge / discharge energy table, the upper limit of the energy stored when fully charged can be determined; when the energy storage power source is discharging, based on its operating parameters and the charge / discharge energy table, the upper limit of the energy that can be released from a full charge can be determined.

[0046] For example, when the energy storage power is being charged, the charging power of the energy storage power is obtained as p and the ambient temperature of the energy storage power is obtained as T. Based on the charging power p and the ambient temperature T of the energy storage power, combined with the preset charging and discharging energy table, the upper limit of the energy that the energy storage power can store when fully charged can be determined as Q watt-hours (Wh).

[0047] Step 012: Calculate the charging and discharging energy based on the charging and discharging parameters of the energy storage power source;

[0048] Optionally, the charging and discharging parameters can be charging parameters and discharging parameters. The charging parameters can be charging voltage, charging current, and charging time, and the discharging parameters can be discharging voltage, discharging current, and discharging time.

[0049] Specifically, based on the charging and discharging parameters of the energy storage power source, the energy that the energy storage power source charges during charging or releases during discharging can be calculated.

[0050] For example, based on the charging power and charging time of the energy storage power source, the integral of the charging time multiplied by the charging power is the charging energy of the energy storage power source; based on the discharging power and discharging time of the energy storage power source, the integral of the discharging time multiplied by the discharging power is the discharging energy of the energy storage power source cabinet.

[0051] Step 013: Determine the current power level of the energy storage power source based on the charging / discharging energy and the upper limit of energy storage.

[0052] Specifically, given the charging and discharging energy of the energy storage power source (such as the charging and discharging energy at various times), the current energy of the energy storage power source after charging and discharging (i.e., the energy currently remaining in the energy storage power source) can be obtained based on the energy before charging and discharging and the cumulative value of the charging and discharging energy at various times (the energy of the energy storage power source increases during charging and decreases during discharging). The current charge level of the energy storage power source can then be determined by comparing its current energy with its maximum energy storage capacity.

[0053] Currently, the capacity of energy storage power supplies is typically calibrated at a defined reference temperature, with the performance and discharge capacity at that temperature considered as baseline values. However, the capacity of energy storage power supplies is affected by factors such as operating temperature and usage conditions. For example, the discharge capacity of an energy storage power supply increases with increasing temperature and decreases with decreasing temperature. Therefore, determining the energy capacity of an energy storage power supply based solely on its percentage of the total capacity is inaccurate and contains significant errors.

[0054] In practice, charging and discharging are essentially energy conversions, and capacity is an indirect reflection of the energy stored in an energy storage system. Furthermore, capacity calculations are affected by factors such as voltage, current, and operating temperature. Therefore, determining the capacity of an energy storage system indirectly based on its capacity has low accuracy. If the capacity is determined based on the energy of the energy storage system, although the upper limit of energy storage may differ under different operating parameters, this upper limit can be easily measured. The charging and discharging energy of the energy storage system can also be calculated based on its operating parameters, eliminating the indirect conversion problem between energy and capacity.

[0055] The energy storage determination method of this application determines the operating environment of the energy storage power source by obtaining its operating parameters, fully considering the influence of the operating environment. Using the operating parameters and a preset charge / discharge energy table, the upper limit of the energy storage capacity is accurately determined. Then, based on the charge / discharge parameters, the charge / discharge energy of the energy storage power source is calculated to obtain the charge / discharge energy at various times, thereby accurately determining the remaining energy. Based on the remaining energy and the upper limit of the energy storage capacity, the energy storage power source's capacity can be accurately determined. Compared to determining the energy storage capacity through capacity, which is less accurate because capacity is obtained indirectly through the conversion of charge / discharge energy, determining the energy storage capacity by directly calculating the charge / discharge energy has higher accuracy.

[0056] In some implementations, the charge / discharge energy meter includes a charging energy meter and a discharging energy meter. The charging energy meter is determined by the upper limit of the charging energy of the energy storage power source under different ambient temperatures and different charging powers. The discharging energy meter is determined by the upper limit of the discharging energy of the energy storage power source under different ambient temperatures and different discharging powers.

[0057] Specifically, considering the impact of different ambient temperatures and different charging and discharging powers on the upper limit of the energy stored by the energy storage power supply, charging and discharging tests can be conducted on the energy storage power supply at different ambient temperatures and different charging and discharging powers to determine the upper limit of the energy stored by the energy storage power supply.

[0058] The charging energy meter tests the energy storage power supply under different ambient temperatures and charging powers, determining the total energy it can store from 0% to 1% charge under fixed ambient temperatures and charging powers. The discharging energy meter tests the energy storage power supply under different ambient temperatures and charging powers, determining the total energy it can release from 1% to 0% charge under fixed ambient temperatures and discharging powers.

[0059] For example, in some embodiments, the charge and discharge energy tables are obtained by calibrating the energy storage power supply. Table 1 shows the charge energy tables obtained by charging tests at different temperatures and power levels. Table 2 shows the discharge energy tables obtained by discharging tests at different temperatures and power levels. The multiplier represents different multiples of power at the rated power, where P represents 1 times the rated power and 0.33P represents 0.33 times the rated power.

[0060] Table 1

[0061] Table 2

[0062] Thus, considering the impact of ambient temperature and charging / discharging power on the upper limit of energy storage, the charging energy table is determined based on ambient temperature and charging power, and the discharging energy table is determined based on ambient temperature and discharging power. By fully considering the influence of ambient temperature and charging / discharging power on the upper limit of energy storage, the uncertainties arising from neglecting these factors are avoided, facilitating a more accurate determination of the upper limit of energy storage.

[0063] Please refer to Figure 3. In some embodiments, the operating parameters of the energy storage power supply include charging and discharging power and operating temperature. Step 011, "Determine the upper limit of the energy storage power supply based on the preset charging and discharging energy meter and the operating parameters of the energy storage power supply", is implemented by step 0111, which will be explained in detail below.

[0064] Step 0111: Determine the upper limit of the energy storage capacity of the energy storage power source based on the charge / discharge energy meter, charge / discharge power, and operating temperature.

[0065] Optionally, the operating parameters of the energy storage power source include charging / discharging power and operating temperature. Charging / discharging power includes charging power and discharging power; charging power is the specific power output of the energy storage power source during charging, and discharging power is the specific power output of the energy storage power source during discharging. Operating temperature can be the ambient temperature in which the energy storage power source operates during charging or discharging.

[0066] Specifically, the charge / discharge energy meter can reflect the upper limit of energy storage corresponding to the charging power and operating temperature during charging, and it can also reflect the upper limit of energy storage corresponding to the discharging power and operating temperature during discharging. Given the charge / discharge power and operating temperature of the energy storage power source, the upper limit of its energy storage capacity can be determined based on the charge / discharge energy meter.

[0067] Thus, by conducting experimental calibration of the energy storage power supply under different operating parameters in advance, charging energy meters and discharging energy meters are obtained. Based on the charging energy meter, under a given ambient temperature and charging power, the upper limit of energy that the energy storage power supply can store can be obtained. Based on the discharging energy meter, under a given ambient temperature and discharging power, the upper limit of energy that the energy storage power supply can release can be obtained, i.e., the upper limit of the energy storage power supply's energy capacity. This eliminates the influence of ambient temperature and the charging / discharging power of the energy storage power supply on the determination of the energy capacity, which is beneficial for achieving more accurate energy capacity determination.

[0068] Please refer to Figure 4. In some embodiments, the charge and discharge parameters include charging parameters and discharging parameters, and the charge and discharge energy includes charging energy and discharging energy. Step 012, "Calculate the charge and discharge energy based on the charge and discharge parameters of the energy storage power supply", is implemented by steps 0121 to 122, which will be explained in detail below.

[0069] Step 0121: Calculate the charging energy based on the charging parameters of the energy storage power source;

[0070] Optionally, the charging parameters can be the charging current, charging voltage, and charging time of the energy storage power supply during charging.

[0071] Specifically, the charging power of the energy storage power source can be calculated based on the charging current and charging voltage parameters. And based on the charging power and charging time, the charging energy of the energy storage power source during the charging time can be calculated.

[0072] Step 0122: Calculate the discharge energy based on the discharge parameters of the energy storage power source.

[0073] Optionally, the discharge parameters can be the discharge current, discharge voltage, and discharge time of the energy storage power supply during discharge.

[0074] Specifically, the discharge power of the energy storage power source can be calculated based on the discharge current and discharge voltage parameters. And based on the discharge power and discharge time, the discharge energy of the energy storage power source during the discharge time can be calculated.

[0075] Thus, given the charging and discharging parameters of the energy storage power source, the charging or discharging energy of the energy storage power source can be calculated.

[0076] Please refer to Figure 5. In some embodiments, step 012, "calculate the charging and discharging energy based on the charging and discharging parameters of the energy storage power source", is implemented by step 0123, which will be explained in detail below.

[0077] Step 0123: Integrate the charging and discharging parameters of the energy storage power source over time to calculate the charging and discharging energy.

[0078] Specifically, when charging an energy storage power source, the charging parameters include charging voltage, charging current, and charging time. The product of the charging voltage and charging current represents the charging power. Multiplying the charging power by the integral of the charging time yields the charging energy of the energy storage power source during the charging time.

[0079] For example, if the energy storage power supply starts charging from t1 and ends charging at t2, the charging voltage U 充 It is 5 volts (V), and the charging current is I. 充 The value is 2 amperes (A). Then the energy Q that the energy storage power source receives from t1 to t2 is... 充 :

[0080] When an energy storage power source discharges, the discharge parameters include discharge voltage, discharge current, and discharge time. The product of the discharge voltage and discharge current represents the discharge power. Multiplying the product of the discharge voltage and discharge current by the integral of the discharge time yields the discharge energy of the energy storage power source during the discharge time.

[0081] For example, if the energy storage power source starts discharging from t2 and ends discharging at t3, the discharge voltage U 放 6V, discharge current I 放 The current is 3A. Therefore, the energy Q released by the energy storage power source from t2 to t3 is... 放 :

[0082] Please refer to Figure 6. In some embodiments, step 013, "determine the current power of the energy storage power source based on the charging and discharging energy and the upper limit of the energy storage energy", is implemented by steps 0131 to 0132, which will be explained in detail below.

[0083] Step 0131: Obtain the initial remaining energy of the energy storage power supply before charging and discharging. The initial remaining energy is determined based on the initial energy of the energy storage power supply when it was fully charged or at zero charge, and the charging and discharging energy corresponding to each charging and discharging parameter obtained between the time when the energy storage power supply was fully charged or at zero charge and the current time.

[0084] Optionally, the initial remaining energy of the energy storage power source can be the remaining energy of the energy storage power source before the current charge / discharge. When the energy storage power source was previously fully charged, its initial energy at full charge can be obtained. When the energy storage power source was previously at zero charge, its initial energy at zero charge can be determined to be 0. By obtaining the charge / discharge parameters from the last time the energy storage power source was fully charged or at zero charge to the current time, the energy input and output of the energy storage power source from the last time the energy storage power source was fully charged or at zero charge to the current time can be calculated.

[0085] Specifically, to calculate the remaining energy of the energy storage power source after this charge-discharge cycle, it is necessary to obtain the initial remaining energy of the energy storage power source before this charge-discharge cycle. The current energy is obtained by adding the energy charged or subtracting the energy released from the initial remaining energy of the energy storage power source. The initial remaining energy of the energy storage power source before this charge-discharge cycle can be determined based on the initial energy of the energy storage power source when it was previously fully charged or at zero charge, and the charge-discharge energies corresponding to various charge-discharge parameters between the time when the energy storage power source was previously fully charged or at zero charge and the current time. If the energy storage power source was previously fully charged, the initial remaining energy before the current charge-discharge cycle can be obtained by adding the energy charged according to each charge parameter and subtracting the energy released according to each discharge parameter, based on the initial energy of the energy storage power source when it was previously fully charged. If the energy storage power source was previously at zero charge, the initial remaining energy before the current charge-discharge cycle can be obtained based on the difference between the charge energy corresponding to each charge parameter and the discharge energy corresponding to each discharge parameter.

[0086] Step 0132: Determine the current charge level of the energy storage power source based on the initial remaining energy, the charge / discharge energy corresponding to the current charge / discharge parameters, and the upper limit of the energy storage.

[0087] Optionally, different charging and discharging parameters of the energy storage power source correspond to different upper limits of energy storage capacity. The upper limit of energy storage capacity can be determined based on the current charging and discharging parameters of the energy storage power source.

[0088] Specifically, based on the current charging and discharging parameters of the energy storage power source, the upper limit of its energy storage capacity can be determined. Furthermore, based on these parameters, the energy gained or lost during the current charging / discharging cycle can be calculated. Adding the energy gained during the current charge cycle to the initial remaining energy of the energy storage power source, or subtracting the energy lost during the current discharge cycle, yields the current energy level after the charging / discharging process. The percentage of this current energy to the upper limit of the energy storage capacity represents the current charge level of the energy storage power source.

[0089] Thus, the amount of electricity is determined by the ratio of the current energy of the energy storage power source after charging and discharging to the upper limit of the energy storage corresponding to the charging and discharging parameters. The amount of electricity of the energy storage power source is reflected by the energy ratio, which takes into account the influence of charging and discharging parameters on the energy storage power source and has higher accuracy.

[0090] For example, if the initial remaining energy is Q0, and the energy storage power source is not charging, the upper limit of the energy storage capacity determined based on the energy storage power source is Q. 总 The calculated charging energy is Q. 充 Then the current energy of the energy storage power source is Q0 + Q 充 The current power level of the energy storage power source is:

[0091] If the initial remaining energy is Q0, and the energy storage power source is discharging, the upper limit of the energy storage capacity determined by the energy storage power source is Q. 总 The calculated discharge energy is Q. 放 Then the current energy of the energy storage power source is Q0-Q 放 The energy storage power supply has the following capacity:

[0092] Please refer to Figure 7. In some embodiments, the power determination method further includes steps 014 to 016, which are described in detail below.

[0093] Step 014: Obtain the current open-circuit voltage of the energy storage power supply;

[0094] Optionally, open-circuit voltage (OCV), also known as "no-load voltage" or "battery electromotive force," refers to the potential difference between the two terminals of a battery when it is not connected to an external circuit (open circuit). OCV is closely related to the battery's capacity and state, and can reflect parameters such as the battery's remaining capacity, internal resistance, and state.

[0095] Specifically, after the energy storage power supply completes this charge and discharge cycle and returns to a stable state, its voltage is measured, which is the open-circuit voltage of the energy storage power supply.

[0096] Step 015: Determine the target energy quantity based on the current open-circuit voltage and the preset energy mapping relationship. The energy mapping relationship is based on the energy determination of the energy storage power supply under different open-circuit voltages.

[0097] Optionally, the preset energy mapping relationship is the mapping relationship between open-circuit voltage and state of energy (SOE), which can be obtained in advance through experimentation.

[0098] Specifically, the energy mapping relationship is pre-calibrated through experiments to obtain the energy mapping relationship. The energy storage power supply is fully charged and left to stand for a period of time. Once the voltage change is less than the calibrated threshold, the OCV value at 100% SOE is obtained. Then, 5% of the energy (calculated using the discharge energy value as the denominator) is discharged to 95% SOE. The energy storage power supply is left to stand for a period of time, and once the voltage change is less than the calibrated threshold, the OCV value at 95% SOE is obtained. This process is repeated until 0% SOE, thus obtaining the SOE-OCV mapping relationship during the discharge of the energy storage power supply.

[0099] With the energy storage power source in a discharged state, charge it with 5% of its energy (calculated using the charging energy value as the denominator) to 5% SOE. Let the energy storage power source rest for a period of time, and when the voltage change is less than the calibrated threshold, read the OCV value at 5% SOE. Repeat this process until 100% SOE is achieved, thus obtaining the SOE-OCV mapping relationship during charging of the energy storage power source.

[0100] Table 3 shows the SOE-OCV mapping relationship table obtained by calibrating the energy mapping relationship in one embodiment.

[0101] Table 3

[0102] Specifically, based on the current open-circuit voltage and charging / discharging parameters of the energy storage power source, and combined with a preset energy mapping relationship, the energy quantity corresponding to the current open-circuit voltage, i.e., the target energy quantity, can be determined. The target energy quantity may be the same as or different from the calculated energy storage power quantity. If the target energy quantity is the same as or only slightly different from the calculated energy storage power quantity, the current energy quantity can be considered accurate. If the target energy quantity is significantly different from the calculated energy storage power quantity, the current energy quantity can be considered inaccurate.

[0103] Step 016: If the difference between the target power level and the current power level is greater than a preset threshold, calibrate the current power level based on the target power level.

[0104] Optionally, the preset threshold can be the allowable difference range between the target power and the current power. If the difference between the target power and the current power is less than the preset threshold, the current power can be considered accurate and no calibration is required.

[0105] Specifically, if the difference between the target power and the current power exceeds a preset threshold, it indicates that the current power may not be accurate and needs to be calibrated. The calibration should be performed based on the target power and the open-circuit voltage corresponding to the target power.

[0106] For example, if the preset threshold is 1%, and the current charge of the energy storage power supply is 95% after charging, the measured open-circuit voltage is 3.342V. However, based on the energy mapping table, the target charge corresponding to the open-circuit voltage is 93%. The difference between the target charge and the current charge is greater than the preset threshold, so the current charge needs to be corrected.

[0107] Thus, based on the fact that open-circuit voltage can reflect parameters such as the battery's remaining capacity, internal resistance, and state, the relationship between the energy storage power supply's charge and open-circuit voltage can be calibrated. When the current charge of the energy storage power supply is inconsistent with the calibrated charge corresponding to the current open-circuit voltage, the current charge can be corrected based on the difference between the current charge and the calibrated charge, thereby improving the accuracy of the obtained current charge.

[0108] Please refer to Figure 8. In some embodiments, after step 014 "obtain the current open-circuit voltage of the energy storage power supply", the correction of the current power can also be achieved by steps 017 to 018, which will be explained in detail below.

[0109] Step 017: Determine the target open-circuit voltage based on the current power level and the preset energy mapping relationship;

[0110] Specifically, based on the current charge level and charging / discharging parameters of the energy storage power source, combined with a preset energy mapping relationship, the open-circuit voltage corresponding to the current charge level, i.e., the target open-circuit voltage, can be determined. The target open-circuit voltage may be the same as or different from the measured open-circuit voltage of the energy storage power source.

[0111] Step 018: Correct the current power level if the difference between the target open-circuit voltage and the current open-circuit voltage is greater than a preset threshold.

[0112] Optionally, the preset threshold can be the allowable range of difference between the target open-circuit voltage and the current open-circuit voltage. If the target open-circuit voltage and the current open-circuit voltage are both less than the preset threshold, the current charge level can be considered accurate, and no calibration is required.

[0113] Specifically, if the difference between the target open-circuit voltage and the current open-circuit voltage exceeds a preset threshold, it indicates that the current battery level may be inaccurate and needs to be calibrated. The current battery level is calibrated based on the battery level corresponding to the target open-circuit voltage and the current open-circuit voltage.

[0114] For example, if the preset threshold for the difference between the target open-circuit voltage and the current open-circuit voltage is 0.1V, and the current charge level of the energy storage power supply is 90%, the preset energy mapping table shows that the open-circuit voltage corresponding to 90% charge is 3.612V, while the current open-circuit voltage is 3.421V. This difference between the target and current open-circuit voltages exceeds the preset threshold, indicating that the current charge level is inaccurate and needs to be corrected. If the current open-circuit voltage corresponds to 89% charge in the preset energy mapping table, the current charge level can be calibrated to 89%, or a more precise calibration can be performed based on historical data.

[0115] Please refer to Figure 9. In some embodiments, the power determination method further includes steps 019 to 021, which are described in detail below.

[0116] Step 019: Obtain the battery health parameters of the energy storage power source;

[0117] Optionally, battery health parameters can reflect the health status of the energy storage power source, representing the capacity retention rate compared to its initial healthy state. Since battery performance gradually declines under prolonged or improper use, potentially leading to a reduction in battery capacity, the capacity retention rate after this reduction is converted into battery health parameters. These parameters can be calibrated in advance through experiments.

[0118] Specifically, the battery health status is pre-calibrated through experiments. The battery health status of the energy storage power supply before it is used is determined to be 100%. Based on the hardware characteristics of the energy storage power supply, a mapping relationship is established between the cumulative discharge amount during use and the battery health status. Given the cumulative discharge amount of the energy storage power supply, the battery health status can be determined based on this cumulative discharge amount.

[0119] For example, if the battery's health is 100% when the energy storage is not in use, the maximum energy storage capacity of the energy storage power supply is 640Wh. After the energy storage power supply has been used for a period of time, the cumulative discharge of the energy storage power supply is 20,000Wh. Based on the cumulative discharge, the battery's health is determined to be 98%. Therefore, the maximum energy storage capacity of the energy storage power supply at this time is 640 * 98%Wh.

[0120] Step 020: Calibrate the current battery level based on battery health parameters.

[0121] Optionally, based on battery health parameters, the upper limit of the energy storage power supply can be calibrated first, and the current power level can be calculated based on the calibrated upper limit of the energy storage power supply to achieve the purpose of calibrating the current power level and improving the accuracy of the current power level.

[0122] For example, when an energy storage power source is charging, its initial remaining energy is Q0, and its charging energy is Q. 充 The upper limit of energy storage determined based on charging parameters and the charging energy meter is Q1. Since the battery health status is 95%, the upper limit of energy storage for the energy storage power supply is calibrated. The calibrated upper limit of energy storage is Q1. 总 =95% * Q1. Calculate the current energy level based on the calibrated upper limit of energy storage:

[0123] Please refer to Figure 10. In some embodiments, the power determination method further includes step 021, which will be described in detail below.

[0124] Step 021: Determine the remaining charging / discharging time based on the current battery level and current charging / discharging parameters.

[0125] Optionally, the remaining charge / discharge time includes the remaining charging time and the remaining discharging time. The remaining charging time is the remaining time required to fully charge the energy storage power source based on the current energy level and charging parameters. The remaining discharging time is the remaining time required to discharge the energy storage power source to its original capacity based on the current energy level and discharging parameters.

[0126] Specifically, when the energy storage power source is currently charging, the upper limit of its energy storage capacity can be obtained based on the charging parameters and a preset charge / discharge energy table. Based on the upper limit of the energy storage power source's charging capacity and the charging parameters, the total time required to charge the energy storage power source from 0% to full capacity can be calculated. Then, based on the total time and the current energy level of the energy storage power source, the remaining charging time required to charge the energy storage power source from its current level to full capacity can be calculated.

[0127] For example, the charging parameters of the acquired energy storage power source include charging power and ambient temperature, where the charging power is P. 充 Given an ambient temperature of T1, the upper limit of the energy storage capacity of the energy storage power source based on both charging power and ambient temperature is Q.总 The total time t required to charge the energy storage power source from 0% to full capacity is then calculated. 充总 :

[0128] If the current charge level of the energy storage power source is 50%, then the remaining charging time t required to charge the energy storage power source from 50% to full capacity is... 充 : t 充 =t 充总 *(1-50%)

[0129] Specifically, when the energy storage power source is currently discharging, the upper limit of the energy storage capacity can be obtained based on the discharge parameters and the preset charge / discharge energy table. Based on the upper limit of the energy storage capacity and the discharge parameters, the total time required to discharge the energy storage power source from full capacity to 0% can be calculated. Then, based on the total discharge time and the current capacity of the energy storage power source, the remaining discharge time required to discharge the energy storage power source from its current capacity to 0% can be calculated.

[0130] For example, the charging parameters of the acquired energy storage power source include discharge power and ambient temperature, where the charging power is P. 放 Given an ambient temperature of T1, the upper limit of the energy storage capacity based on the discharge power and ambient temperature is Q. 总 The total time t required for the energy storage power source to discharge from full charge to 0% is then calculated. 放总 :

[0131] If the current charge of the energy storage power source is 40%, then the remaining discharge time t required to discharge the energy storage power source from 40% to 0% is... 放 : t 放 =t 放总 *40%

[0132] In this way, with the current power level and charging / discharging parameters of the energy storage power source, the remaining charging time or remaining discharging time can be easily calculated, which helps users understand the power status and plan the use of the energy storage power source.

[0133] Please refer to Figure 1 again. This application also provides an energy storage power supply 100, which includes a processor (which may be the controller 60 shown in Figure 1), a memory, and a computer program. The computer program is stored in the memory and executed by the processor. The computer program includes instructions for executing the power determination method applied to any of the above embodiments of the battery module. For the sake of brevity, it will not be described in detail here.

[0134] Please refer to Figure 11. This application also provides a computer-readable storage medium 500 storing a computer program 510. When the computer program 510 is executed by a processor 520 (such as a controller of a battery module or a processor of a server), it implements the steps of the power determination method of any of the above embodiments. For the sake of brevity, it will not be described again here.

[0135] Referring to Figure 12, this application embodiment also provides a power determination device 300, which may include a first determination module 11, a calculation module 12, and a second determination module 13. The first determination module 11 is used to determine the upper limit of the energy storage power supply based on a preset charge / discharge energy meter and the operating parameters of the energy storage power supply; the calculation module 12 is used to calculate the charge / discharge energy based on the charge / discharge parameters of the energy storage power supply; and the second determination module 13 is used to determine the current power of the energy storage power supply based on the charge / discharge energy and the upper limit of the energy storage capacity.

[0136] In some embodiments, the first determining module 11 is further configured to determine the upper limit of the energy storage power supply based on the charge / discharge energy meter, charge / discharge power and operating temperature.

[0137] In some embodiments, the charge and discharge parameters include charging parameters and discharging parameters, and the charge and discharge energy includes charging energy and discharging energy. The calculation module 12 is also used to calculate the charging energy based on the charging parameters of the energy storage power supply and to calculate the discharging energy based on the discharging parameters of the energy storage power supply.

[0138] In some embodiments, the calculation module 12 is further used to integrate the charging and discharging parameters of the energy storage power source over time to calculate the charging and discharging energy.

[0139] In some embodiments, the second determining module 13 is further configured to obtain the initial remaining energy of the energy storage power supply before charging and discharging. The initial remaining energy is determined based on the initial energy of the energy storage power supply when it was fully charged or at zero charge, and the charging and discharging energy corresponding to each charging and discharging parameter obtained between the time when the energy storage power supply was fully charged or at zero charge and the current time. Based on the initial remaining energy, the charging and discharging energy corresponding to the charging and discharging parameters at the current time, and the upper limit of the energy storage, the current charge level of the energy storage power supply is determined.

[0140] In some embodiments, the power determination device 300 further includes a first calibration module 14, which is used to acquire the current open-circuit voltage of the energy storage power supply; determine the target power supply based on the current open-circuit voltage and a preset energy mapping relationship, wherein the energy mapping relationship is based on the energy determination of the energy storage power supply under different open-circuit voltages; and calibrate the current power supply based on the target power supply when the difference between the target power supply and the current power supply is greater than a preset threshold.

[0141] In some embodiments, the power determination device 300 further includes a second calibration module 15, which is used to acquire battery health parameters of the energy storage power supply and calibrate the current power level based on the battery health parameters.

[0142] In some embodiments, the power determination device 300 further includes a third determination module 16, which is used to determine the remaining charging and discharging time based on the current power and the current charging and discharging parameters.

[0143] In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0144] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0145] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for determining the amount of electricity, wherein, include: Based on the preset charge and discharge energy meter and the operating parameters of the energy storage power supply, the upper limit of the energy storage power supply is determined. The charge and discharge energy meter includes the upper limit of the energy storage power supply under different operating parameters. Calculate the charging and discharging energy based on the charging and discharging parameters of the energy storage power source; The current power level of the energy storage power source is determined based on the charging and discharging energy and the upper limit of the energy storage.

2. The method for determining the amount of electricity according to claim 1, wherein, The charge / discharge energy meter includes a charging energy meter and a discharging energy meter. The charging energy meter determines the upper limit of the charging energy of the energy storage power source under different ambient temperatures and different charging powers. The discharging energy meter determines the upper limit of the discharging energy of the energy storage power source under different ambient temperatures and different discharging powers.

3. The method for determining the amount of electricity according to claim 1 or 2, wherein, The operating parameters of the energy storage power source include charging and discharging power and operating temperature. Determining the upper limit of the energy storage power source's energy storage capacity based on a preset charging and discharging energy meter and the operating parameters of the energy storage power source includes: Based on the charge / discharge energy meter, the charge / discharge power, and the operating temperature, the upper limit of the energy storage capacity of the energy storage power supply is determined.

4. The method for determining the amount of electricity according to claim 1, wherein, The charging and discharging parameters include charging parameters and discharging parameters, and the charging and discharging energy includes charging energy and discharging energy. Calculating the charging and discharging energy based on the charging and discharging parameters of the energy storage power source includes: The charging energy is calculated based on the charging parameters of the energy storage power source; The discharge energy is calculated based on the discharge parameters of the energy storage power source.

5. The method for determining the amount of electricity according to claim 4, wherein, The charging parameters include charging current, charging voltage, and charging time; the discharging parameters include discharging current, discharging voltage, and discharging time.

6. The method for determining the amount of electricity according to claim 1 or 4, wherein, The calculation of charge / discharge energy based on the charge / discharge parameters of the energy storage power source includes: The charging and discharging energy is calculated by integrating the charging and discharging parameters of the energy storage power source over time.

7. The method for determining the amount of electricity according to claim 1, wherein, Determining the current power level of the energy storage power source based on the charging / discharging energy and the upper limit of the energy storage capacity includes: The initial remaining energy of the energy storage power supply before charging and discharging is obtained. The initial remaining energy is determined based on the initial energy of the energy storage power supply when it was fully charged or at zero charge last time, and the charging and discharging energy corresponding to each of the charging and discharging parameters obtained between the time when the energy storage power supply was fully charged or at zero charge last time and the current time. Based on the initial remaining energy, the charging and discharging energy corresponding to the charging and discharging parameters at the current moment, and the upper limit of the energy storage, the current power level of the energy storage power source is determined.

8. The method for determining the amount of electricity according to claim 1, wherein, Also includes: Obtain the current open-circuit voltage of the energy storage power supply; Based on the current open-circuit voltage and the preset energy mapping relationship, the target power is determined. The energy mapping relationship is based on the energy of the energy storage power source under different open-circuit voltages. If the difference between the target power level and the current power level is greater than a preset threshold, the current power level is calibrated based on the target power level.

9. The method for determining the amount of electricity according to claim 8, wherein, Also includes: Fully charge the energy storage power supply and detect the open-circuit voltage of the energy storage power supply; If the change in the open-circuit voltage of the energy storage power supply is less than the calibration threshold, the current open-circuit voltage is determined to be the open-circuit voltage when the power is 100%. The energy storage power supply is discharged based on the calibrated power to obtain the open-circuit voltage of the energy storage power supply at different power levels during the process of the power supply decreasing from 100% to 0%. The energy mapping relationship is determined based on the open-circuit voltage of the energy storage power source under different power levels.

10. The method for determining the amount of electricity according to claim 1 or 8, wherein, Also includes: Obtain the battery health parameters of the energy storage power source; The current battery level is calibrated based on the battery health parameters.

11. The method for determining the amount of electricity according to claim 10, wherein, Also includes: Establish a mapping relationship between the cumulative discharge of the energy storage power source and the battery health parameters; The battery health parameters are determined based on the cumulative discharge amount.

12. The method for determining the amount of electricity according to any one of claims 1-11, wherein, Also includes: Based on the current battery level and the current charging / discharging parameters, determine the remaining charging / discharging time.

13. The method for determining the amount of electricity according to claim 1, wherein, The energy storage power supply includes one or more discharge interfaces, and the interface types of the multiple discharge interfaces may be the same or different.

14. The method for determining the amount of electricity according to claim 1, wherein, The energy storage power supply includes a charging interface, which may include a USB interface, a TYPE-C interface, a Lightning interface, or a DC power interface.

15. A power determination device, wherein, The power determination device includes a first determination module, a calculation module, and a second determination module. The first determination module is used to determine the upper limit of the energy storage power supply based on a preset charging and discharging energy meter and the operating parameters of the energy storage power supply. The calculation module is used to calculate the charging and discharging energy based on the charging and discharging parameters of the energy storage power source. The second determining module is used to determine the current power level of the energy storage power source based on the charging and discharging energy and the upper limit of the energy storage.

16. The power determination device according to claim 15, wherein, The first determining module is also used to determine the upper limit of the energy storage power supply based on the charge and discharge energy meter, charge and discharge power and operating temperature.

17. The power determination device according to claim 15 or 16, wherein, The charging and discharging parameters include charging parameters and discharging parameters, and the charging and discharging energy includes charging energy and discharging energy. The calculation module is also used to calculate the charging energy based on the charging parameters of the energy storage power supply. The discharge energy is calculated based on the discharge parameters of the energy storage power source.

18. The power determination device according to claim 15, wherein, The calculation module is also used to integrate the charging and discharging parameters of the energy storage power source over time to calculate the charging and discharging energy.

19. An energy storage power source, wherein, include: Processor and memory; The memory stores a computer program, which is executed by the processor. The computer program includes instructions for performing the power determination method according to any one of claims 1 to 14.

20. A non-volatile computer-readable storage medium comprising a computer program, which, when executed by a processor, causes the processor to perform the power determination method according to any one of claims 1 to 14.

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