Energy efficiency evaluation method, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses an energy efficiency evaluation method, electronic equipment and a storage medium. The energy efficiency evaluation method comprises the steps that an energy storage system is placed in a target environment; preheating the energy storage system placed in the target environment; after preheating is completed, full charging is carried out at the nominal charging rate of the energy storage system; after charging is completed, full discharge is carried out at the nominal discharge rate of the energy storage system; and according to the total energy absorbed by the energy storage system from the external power supply and the total energy released by the energy storage system to the load, performing energy efficiency evaluation on the energy storage system, and according to the scheme, the accuracy of an evaluation result can be improved while the cost and the evaluation duration are reduced.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and in particular to an energy efficiency evaluation method, an electronic device, and a storage medium. Background Art

[0002] In the application scenarios of energy storage systems on the power generation side, grid side, and user side, economy and availability are key considerations, while energy efficiency is one of the core indicators for measuring its performance.

[0003] Currently, the energy efficiency of energy storage systems can be evaluated in the following ways: (1) Initialize discharge - charge - discharge, perform a single charge - discharge test, or directly use on - site operation data as the basis for system energy efficiency evaluation; due to operation control or dual - safety considerations, the charging / discharging cut - off condition range is narrowed, that is, the depth of discharge (DOD) of charging / discharging is less than 100%, and the full - charge and full - discharge evaluation conditions cannot be achieved, resulting in distorted system energy efficiency test data. (2) Initialize discharge - charge - discharge, perform a single full - charge and full - discharge test to evaluate the system energy efficiency; there are problems in the scheme (2) such as inconsistent initial temperature environments for charge - discharge tests, and the system cannot be fully activated during a single charge - discharge, resulting in unstable system energy efficiency performance. The high frequency of retesting is caused by the unqualified system energy efficiency evaluation results. (3) Initialize discharge - charge - discharge, perform three full - charge and full - discharge tests to evaluate the system energy efficiency; this method has a long evaluation time and high evaluation costs. Especially for large - scale energy storage systems, due to economic considerations, multiple charge - discharge cycles cannot be fully executed.

[0004] It can be seen that the current energy efficiency evaluation scheme for energy storage systems has problems such as inaccurate evaluation results, long evaluation time, and high costs. Summary of the Invention

[0005] Embodiments of this application provide an energy efficiency evaluation method, an electronic device, and a storage medium, which can improve the accuracy of evaluation results while reducing costs and evaluation time.

[0006] Embodiments of this application provide an energy efficiency evaluation method, including:

[0007] Place the energy storage system in a target environment;

[0008] Preheat the energy storage system placed in the target environment;

[0009] After preheating is completed, perform a full charge at the nominal charge rate of the energy storage system;

[0010] After charging is completed, perform a full discharge at the nominal discharge rate of the energy storage system;

[0011] Evaluate the energy efficiency of the energy storage system based on the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load.

[0012] Optionally, in some embodiments of the present application, preheating the energy storage system placed in a target environment includes:

[0013] Determine the preheating temperature corresponding to the energy storage system;

[0014] Heat the energy storage system placed in the target environment to the preheating temperature through a thermal management system.

[0015] Optionally, in some embodiments of the present application, the preheating temperature is greater than or equal to 29°C and less than or equal to 32°C.

[0016] Optionally, in some embodiments of the present application, after the preheating is completed, fully charge at the nominal charging rate of the energy storage system, including:

[0017] Set charging parameters according to the nominal charging rate of the energy storage system;

[0018] Charge the energy storage system according to the charging parameters until the energy storage system meets the charging preset conditions.

[0019] Optionally, in some embodiments of the present application, setting the charging parameters according to the nominal charging rate of the energy storage system includes:

[0020] Obtain the battery capacity corresponding to the energy storage system;

[0021] Calculate the charging current corresponding to the energy storage system according to the nominal charging rate and the battery capacity;

[0022] Based on the charging current, determine the charging voltage and charging mode corresponding to the energy storage system.

[0023] Optionally, in some embodiments of the present application, after the charging is completed, fully discharge at the nominal discharge rate of the energy storage system, including:

[0024] Set discharge parameters according to the nominal discharge rate of the energy storage system;

[0025] Discharge the energy storage system according to the discharge parameters until the energy storage system meets the discharge preset conditions.

[0026] Optionally, in some embodiments of the present application, setting the discharge parameters according to the nominal discharge rate of the energy storage system includes:

[0027] Calculate the discharge current corresponding to the energy storage system according to the nominal charging rate and the battery capacity corresponding to the energy storage system;

[0028] Based on the discharge current, determine the discharge voltage and discharge mode corresponding to the energy storage system.

[0029] Optionally, in some embodiments of the present application, the energy efficiency evaluation of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load includes:

[0030] Calculate the total amount absorbed by the energy storage system from the external power source according to the charging current, charging voltage, and charging duration during the charging process of the energy storage system;

[0031] Calculate the total energy released by the energy storage system to the load according to the discharge current, discharge voltage, and discharge duration during the discharge process of the energy storage system;

[0032] Calculate the ratio between the total amount absorbed by the energy storage system from the external power source and the total energy released by the energy storage system to the load to obtain the energy efficiency corresponding to the energy storage system.

[0033] Correspondingly, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, it performs the steps of any of the above methods.

[0034] The present application further provides a computer-readable storage medium, where the storage medium stores a computer program, and when the computer program is executed by a processor, it implements the steps of any of the above methods.

[0035] The embodiments of the present application provide an energy efficiency evaluation method, an electronic device, and a storage medium. After placing the energy storage system in a target environment, preheat the energy storage system placed in the target environment. Then, after the preheating is completed, perform a full charge at the nominal charging rate of the energy storage system, and after the charging is completed, perform a full discharge at the nominal discharge rate of the energy storage system. Finally, evaluate the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load. The energy efficiency evaluation scheme provided by the present application preheats the energy storage system placed in the target environment to ensure that the energy storage system is within the optimal operating temperature range during operation, thereby improving the accuracy of subsequent energy efficiency evaluation. In addition, the energy efficiency evaluation scheme provided by the present application does not require multiple charge and discharge operations on the energy storage system. Therefore, while reducing costs and reducing the evaluation duration, the accuracy of the evaluation results is improved. Description of the Drawings

[0036] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other attached drawings can be obtained based on these attached drawings.

[0037] Figure 1 is a schematic flowchart of the energy efficiency evaluation method provided by the embodiments of the present application;

[0038] Figure 2 is a schematic structural diagram of the electronic device provided by the embodiments of the present application. Specific embodiments

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the attached drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0040] The embodiments of the present application provide an energy efficiency evaluation method, device, electronic device, and storage medium.

[0041] Among them, the energy efficiency evaluation device can be specifically applied to a terminal. The terminal can include a tablet computer or a personal computer (PC, Personal Computer). The terminal can establish a wired or wireless connection with a server. The server can include an independently operating server or a distributed server, or can also include a server cluster composed of multiple servers.

[0042] The following will be described in detail respectively. It should be noted that the description order of the following embodiments does not limit the priority order of the embodiments.

[0043] An energy efficiency evaluation method includes: placing an energy storage system in a target environment; preheating the energy storage system placed in the target environment; after the preheating is completed, performing full charge at the nominal charge rate of the energy storage system; after the charging is completed, performing full discharge at the nominal discharge rate of the energy storage system; evaluating the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load.

[0044] Please refer to Figure 1 , Figure 1 is a schematic flowchart of the energy efficiency evaluation method provided by the embodiments of the present application. The specific process of this energy efficiency evaluation method can be as follows:

[0045] 101. Place the energy storage system in the target environment.

[0046] An energy storage system (ESS) is a device or system that can store and release energy, and is widely used in fields such as power systems, renewable energy integration, mobile devices, and electric vehicles. The core function of the energy storage system is to store electrical energy, thermal energy, or other forms of energy and release it when needed to meet different application requirements.

[0047] The target environment refers to the specific environment in which the energy storage system is located during the energy efficiency assessment. The target environment can be maintained within a certain temperature range to ensure the optimal operating temperature of the energy storage system. For example, it can be achieved through a thermal management system or a constant temperature device.

[0048] 102. Preheat the energy storage system placed in the target environment.

[0049] Preheating the energy storage system placed in the target environment is to ensure that the energy storage system reaches the optimal operating state before the energy efficiency assessment. At the optimal operating temperature, the chemical reaction of the battery cells is more stable, the internal resistance is lower, and the charge and discharge efficiency is higher. Preheating can reduce the temperature gradient inside the energy storage system and ensure that all battery cell monomers operate under the same temperature conditions, thereby improving the overall performance and consistency of the system.

[0050] For example, before preheating, ensure that the energy storage system is in a safe and stable state. Then, set the preheating temperature through the thermal management system. The preheating temperature can be adjusted according to the specific requirements of the energy storage system. During the preheating process, the temperature of the battery cell monomers is monitored in real time through the battery management system (BMS) or data acquisition system of the energy storage system. When the temperature of the battery cell monomers of the energy storage system stabilizes within the preheating temperature range, the preheating is completed.

[0051] Specifically, taking a lithium-ion energy storage system as an example for illustration, the rated capacity of this lithium-ion energy storage system is 100 kWh) for preheating, and the preheating temperature range is 29°C to 32°C. First, set the preheating temperature through the thermal management system, such as setting the preheating temperature to 30°C. Then, start the thermal management system and view the temperature of the battery cell monomers in real time through the BMS monitoring interface. If it is found that the temperature of some battery cell monomers rises slowly or quickly, the parameters of the thermal management system can be adjusted appropriately, such as increasing or decreasing the heating power. When the temperature of all battery cell monomers stabilizes at 30°C, confirm that the preheating is completed.

[0052] Optionally, in some embodiments of the present application, the step of "preheating the energy storage system placed in the target environment" may specifically include:

[0053] Determine the preheating temperature corresponding to the energy storage system;

[0054] Heat the energy storage system placed in the target environment to the preheating temperature through the thermal management system.

[0055] For example, consult the technical manual or technical specification of the energy storage system to determine the corresponding preheating temperature range. For a lithium-ion energy storage system, the preheating temperature range is 29°C to 32°C. It should be noted that if a specific preheating temperature is provided in the technical specification, set the temperature according to that. If no specific temperature is provided, determine a suitable temperature within the range of 29°C to 32°C according to actual needs. Then, set the target preheating temperature in the control interface of the thermal management system. For example, if the determined preheating temperature is 30°C, set the target temperature to 30°C. Next, start the preheating function of the thermal management system, and through the BMS (Battery Management System) or data acquisition system of the energy storage system, monitor the temperature of each single cell in real time. When the temperature of all single cells stabilizes at 30°C, confirm that the preheating is completed.

[0056] Optionally, in some embodiments of the present application, the preheating temperature is greater than or equal to 29°C and less than or equal to 32°C.

[0057] 103. After the preheating is completed, perform a full charge at the nominal charging rate of the energy storage system.

[0058] The nominal charging rate is the standard charging rate defined in the design and specifications of the energy storage system (such as a battery or a battery pack). It is an important parameter to measure the charging speed of the battery and is usually represented by "C". The nominal charging rate is directly related to the magnitude of the charging current, thus affecting the charging time and the performance of the battery.

[0059] For example, specifically, to obtain the nominal charging rate of the energy storage system, it can be obtained by consulting the technical manual or technical specification of the energy storage system. Then, the charging parameters can be set based on the nominal charging rate and the battery capacity corresponding to the energy storage system. Finally, perform a full charge on the energy storage system according to the set charging parameters.

[0060] Optionally, in some embodiments of the present application, the step "After the preheating is completed, perform a full charge at the nominal charging rate of the energy storage system" may specifically include:

[0061] Set the charging parameters according to the nominal charging rate of the energy storage system;

[0062] Charge the energy storage system according to the charging parameters until the energy storage system meets the charging preset conditions.

[0063] The battery capacity of the energy storage system refers to the total amount of electrical energy that all battery units (cells) in the entire energy storage system can store.

[0064] For example, obtain the nominal charge rate (C-rate) and battery capacity (Ah) of the energy storage system. For instance, the nominal charge rate is 1C and the battery capacity is 100Ah. Then, use the formula to calculate the charging current: I = C-rate × battery capacity (Ah). For example, when the nominal charge rate is 1C and the battery capacity is 100Ah, the charging current is: I = 1 × 100Ah = 100A. Next, start the charging process on the charging device. The charging device will start charging according to the set current. Monitor the state of charge (SOC) of the energy storage system through the BMS of the energy storage system to ensure that it gradually rises to 100%, completing the full charge of the energy storage system.

[0065] It should be noted that when the energy storage system meets the charging preset conditions, the charging is completed. The charging preset conditions include: the SOC reaches 100%: the state of charge (SOC) of the energy storage system reaches 100%, or the cell voltage reaches the charging cut-off condition: for example, for a lithium-ion battery, the cell voltage reaches 4.2V.

[0066] Optionally, in some embodiments of the present application, the step of "setting charging parameters according to the nominal charge rate of the energy storage system" may specifically include:

[0067] Obtain the battery capacity corresponding to the energy storage system;

[0068] Calculate the charging current corresponding to the energy storage system according to the nominal charge rate and the battery capacity;

[0069] Based on the charging current, determine the charging voltage and charging mode corresponding to the energy storage system.

[0070] For example, for a lithium-ion battery energy storage system, its nominal charge rate is 1C and the battery capacity is 100Ah, then the charging current I = 1 × 100Ah = 100A; in addition, for a lithium-ion battery, the charging voltage is usually between 3.0V and 4.2V (the specific value depends on the battery type). If multiple cells are connected in series, the cell voltage needs to be multiplied by the number of cells. For example, for 10 cells of 4.2V connected in series, the total voltage is 42V. At the same time, the charging mode of the charging device can also be set according to actual needs, such as constant current charging (CC), constant voltage charging (CV), etc. Among them, the charging device can include charging piles, chargers, solar chargers, etc., which are specifically determined according to the type of the energy storage system and are not limited here.

[0071] 104. After the charging is completed, perform a full discharge at the nominal discharge rate of the energy storage system.

[0072] The nominal discharge C-rate is the standard discharge rate defined in the design and specifications of an energy storage system (such as a battery or battery pack). The nominal discharge C-rate is a measure of the multiple of the rated capacity that a battery can discharge per unit time, usually denoted by "C". The nominal discharge C-rate directly affects the magnitude of the discharge current, thereby affecting the discharge time and the performance of the battery. Among them, the nominal discharge C-rate specifically refers to the multiple of the rated capacity that a battery can discharge per unit time. The nominal discharge C-rate = discharge current / battery capacity. Therefore, after charging is completed, the discharge current can be determined based on the nominal discharge C-rate and the battery capacity corresponding to the energy storage system. Then, the energy storage system can be fully discharged based on this discharge current. For example, if the nominal discharge C-rate is 1C and the battery capacity is 100Ah, the discharge current I = 1×100Ah = 100A can be calculated. Then, through a discharge device, the energy storage system can be fully discharged based on this discharge current.

[0073] Optionally, in some embodiments of the present application, the step of "fully discharging at the nominal discharge C-rate of the energy storage system after charging is completed" may specifically include:

[0074] Set the discharge parameters according to the nominal discharge C-rate of the energy storage system;

[0075] Discharge the energy storage system according to the discharge parameters until the energy storage system meets the discharge preset conditions.

[0076] For example, obtain that the nominal discharge C-rate of the energy storage system is 1C and the battery capacity is 100Ah. Then, calculate the discharge current I = 1×100Ah = 100A. Next, the discharge current can be set to 100A through a discharge device. Then, start the discharge process on the discharge device. The discharge device will start discharging according to the set current and voltage parameters. Finally, monitor the SOC of the energy storage system through its BMS to ensure that it gradually drops to 0%. When the energy storage system meets the discharge preset conditions, the discharge is completed. The discharge preset conditions may include: the SOC (state of charge) of the energy storage system reaches 0%, or the single-cell voltage of the battery reaches the discharge cut-off condition: for example, for a lithium-ion battery, the single-cell voltage reaches 3.0V.

[0077] Optionally, in some embodiments of the present application, the step of "setting the discharge parameters according to the nominal discharge C-rate of the energy storage system" may specifically include:

[0078] Calculate the discharge current corresponding to the energy storage system according to the nominal charge C-rate and the battery capacity corresponding to the energy storage system;

[0079] Based on the discharge current, determine the discharge voltage and discharge mode corresponding to the energy storage system.

[0080] For example, the nominal discharge rate of an energy storage system is 1C, and the battery capacity is 100Ah. Then, based on the nominal discharge rate and the battery capacity, the discharge current I = C-rate × battery capacity (Ah) = 1 × 100Ah = 100A. Meanwhile, the discharge voltage is set according to the requirements of the energy storage system. For lithium-ion batteries, the discharge voltage is usually between 3.0V and 4.2V (the specific value depends on the battery type). In addition, the discharge mode of the discharge device can also be set as needed, such as constant current discharge (CC), constant voltage discharge (CV), etc.

[0081] It should be noted that the discharge device is a device used to release electrical energy from an energy storage system (such as a battery or a battery pack). It ensures that the energy storage system discharges under safe and efficient conditions by controlling the discharge current and voltage. The type and function of the discharge device depend on factors such as the application scenario of the energy storage system, the battery type, the capacity, and the discharge requirements. The discharge device can be an industrial-grade discharge device (such as the ABB industrial-grade discharge device), a fast discharge device (such as the Electrify America DC fast discharge device), an AC discharge device (such as the ChargePoint home discharge device), and a DC discharge device (such as the Electrify America DC fast discharge device), which are specifically selected according to the actual situation and are not restricted here.

[0082] 105. Evaluate the energy efficiency of the energy storage system based on the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load.

[0083] Before evaluating the energy efficiency of the energy storage system, it is necessary to obtain the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load. Among them, the total energy absorbed by the energy storage system from an external power source refers to the total amount of electrical energy obtained by the energy storage system from an external power source during the charging process, which reflects the actual electrical energy consumed by the energy storage system during the charging process; the total energy released by the energy storage system to a load refers to the total amount of electrical energy provided by the energy storage system to an external load during the discharge process, which reflects the actual electrical energy output by the energy storage system during the discharge process.

[0084] For example, the charging energy can be calculated by recording the current, voltage, and time data during the charging process through a high-precision watt-hour meter or the BMS (battery management system) of the energy storage system; at the same time, the discharge energy can be calculated by recording the current, voltage, and time data during the discharge process through a high-precision watt-hour meter or the BMS of the energy storage system; then, calculate the ratio of the discharge energy to the charging energy to obtain the energy efficiency of the energy storage system.

[0085] Optionally, in some embodiments of the present application, the step of "evaluating the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load" may specifically include:

[0086] Calculate the total amount absorbed by the energy storage system from the external power source according to the charging current, charging voltage, and charging duration during the charging process of the energy storage system;

[0087] Calculate the total energy released by the energy storage system to the load according to the discharge current, discharge voltage, and discharge duration during the discharge process of the energy storage system;

[0088] Calculate the ratio between the total amount absorbed by the energy storage system from the external power source and the total energy released by the energy storage system to the load to obtain the energy efficiency corresponding to the energy storage system.

[0089] For example, collect the charging current Icharge, charging voltage Vcharge, and charging duration Δt during the charging process. Then, calculate the charging energy Echarge = charging current Icharge * charging voltage Vcharge * charging duration Δt1; at the same time, collect the discharge current Idischarge, discharge voltage Vdischarge, and discharge duration (Δt2) during the discharge process. Calculate the discharge energy Edischarge = discharge current Idischarge * discharge voltage Vdischarge * discharge duration Δt2. Finally, use the formula to calculate the energy efficiency η = Edischarge / Echarge × 100%, where Edischarge is the discharge energy and Echarge is the charging energy. Specifically, when the energy storage system is a 100Ah lithium-ion energy storage system and the energy efficiency is evaluated, the charging parameters during the charging process are: the charging current is 100A; the charging voltage is 350V; the charging time is 1 hour (3600 seconds), then the charging energy = 100A x 350V x 3600s = 1260kWh; the discharge parameters during the discharge process are: the discharge current is 100A, the discharge voltage is 340V; the discharge time is 1 hour (3600 seconds), then calculate the discharge energy = 100A × 340V × 3600s = 1224kWh, so the energy efficiency η = 1224kWh / 1260kWh ≈ 97.14%.

[0090] An embodiment of the present application provides an energy efficiency evaluation method. After placing the energy storage system in the target environment, the energy storage system placed in the target environment is preheated. Then, after the preheating is completed, full charge is performed at the nominal charge rate of the energy storage system, and after the charging is completed, full discharge is performed at the nominal discharge rate of the energy storage system. Finally, the energy efficiency of the energy storage system is evaluated according to the total energy absorbed by the energy storage system from the external power supply and the total energy released by the energy storage system to the load. The energy efficiency evaluation solution provided by the present application preheats the energy storage system placed in the target environment to ensure that the energy storage system is within the optimal operating temperature range during operation, thereby improving the accuracy of subsequent energy efficiency evaluation. In addition, the energy efficiency evaluation solution provided by the present application does not require multiple charge and discharge operations on the energy storage system. Thus, while reducing costs and the evaluation duration, the accuracy of the evaluation results is improved.

[0091] In addition, an embodiment of the present application further provides an electronic device, as Figure 2 shown, which shows a schematic structural diagram of the electronic device involved in the embodiment of the present application. Specifically:

[0092] The electronic device may include a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, an input unit 304, and other components. Those skilled in the art can understand that Figure 2 the structure of the electronic device shown in

[0093] does not constitute a limitation on the electronic device. It may include more or fewer components than shown, or combine certain components, or have different component arrangements. Among them:

[0094] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and energy efficiency evaluations by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the electronic device, etc. In addition, the memory 302 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices. Correspondingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0095] The electronic device further includes a power supply 303 for powering each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 303 may also include any components such as one or more DC or AC power supplies, a recharge system, a power failure detection circuit, a power converter or inverter, and a power status indicator.

[0096] The electronic device may further include an input unit 304, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0097] Although not shown, the electronic device may further include a display unit, etc., which will not be elaborated here. Specifically, in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302 to implement various functions as follows:

[0098] Place the energy storage system in the target environment; preheat the energy storage system placed in the target environment; after the preheating is completed, perform full charge at the nominal charge rate of the energy storage system; after the charging is completed, perform full discharge at the nominal discharge rate of the energy storage system; evaluate the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from the external power supply and the total energy released by the energy storage system to the load.

[0099] For the specific implementation of each of the above operations, reference can be made to the previous embodiments, which will not be elaborated here.

[0100] After placing the energy storage system in the target environment in an embodiment of the present application, the energy storage system placed in the target environment is preheated. Then, after the preheating is completed, full charge is performed at the nominal charge rate of the energy storage system, and after the charging is completed, full discharge is performed at the nominal discharge rate of the energy storage system. Finally, the energy efficiency of the energy storage system is evaluated according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load. The energy efficiency evaluation solution provided by the present application preheats the energy storage system placed in the target environment, ensuring that the energy storage system is within the optimal operating temperature range during operation, thereby improving the accuracy of subsequent energy efficiency evaluation. In addition, the energy efficiency evaluation solution provided by the present application does not require multiple charge and discharge operations on the energy storage system. Thus, while reducing costs and the evaluation duration, the accuracy of the evaluation results is improved.

[0101] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions or by controlling relevant hardware through instructions. The instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0102] Therefore, an embodiment of the present application provides a storage medium storing multiple instructions that can be loaded by a processor to execute the steps in any of the energy efficiency evaluation methods provided by the embodiments of the present application. For example, the instructions can perform the following steps:

[0103] Place the energy storage system in the target environment; preheat the energy storage system placed in the target environment; after the preheating is completed, perform full charge at the nominal charge rate of the energy storage system; after the charging is completed, perform full discharge at the nominal discharge rate of the energy storage system; evaluate the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load.

[0104] For the specific implementation of each of the above operations, reference can be made to the previous embodiments and will not be elaborated here.

[0105] Among them, the storage medium may include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), a magnetic disk, an optical disc, or the like.

[0106] Since the instructions stored in the storage medium can execute the steps in any of the energy efficiency evaluation methods provided by the embodiments of the present application, the beneficial effects achievable by any of the energy efficiency evaluation methods provided by the embodiments of the present application can be realized. For details, refer to the previous embodiments and will not be elaborated here.

[0107] The above has introduced in detail an energy efficiency evaluation method, an electronic device, and a storage medium provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present application.

Claims

1. An energy efficiency evaluation method, characterized in that, Including: Placing the energy storage system in the target environment; Preheating the energy storage system placed in the target environment; After the preheating is completed, performing full charge at the nominal charge rate of the energy storage system; After the charging is completed, performing full discharge at the nominal discharge rate of the energy storage system; Evaluating the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load.

2. The energy efficiency assessment method according to claim 1, characterized in that, The preheating the energy storage system placed in the target environment includes: Determining the preheating temperature corresponding to the energy storage system; Heating the energy storage system placed in the target environment to the preheating temperature through a thermal management system.

3. The energy efficiency evaluation method according to claim 2, wherein The preheating temperature is greater than or equal to 29°C and less than or equal to 32°C.

4. The energy efficiency evaluation method according to claim 1, characterized in that The performing full charge at the nominal charge rate of the energy storage system after the preheating is completed includes: Setting charging parameters according to the nominal charge rate of the energy storage system; Charging the energy storage system according to the charging parameters until the energy storage system meets the charging preset conditions.

5. The energy efficiency evaluation method according to claim 4, characterized in that, The setting charging parameters according to the nominal charge rate of the energy storage system includes: Obtaining the battery capacity corresponding to the energy storage system; Calculating the charging current corresponding to the energy storage system according to the nominal charge rate and the battery capacity; Based on the charging current, determining the charging voltage and charging mode corresponding to the energy storage system.

6. The energy efficiency evaluation method according to claim 1, wherein The performing full discharge at the nominal discharge rate of the energy storage system after the charging is completed includes: Setting discharge parameters according to the nominal discharge rate of the energy storage system; Discharging the energy storage system according to the discharge parameters until the energy storage system meets the discharge preset conditions.

7. The energy efficiency evaluation method according to claim 6, characterized in that, The setting discharge parameters according to the nominal discharge rate of the energy storage system includes: Calculating the discharge current corresponding to the energy storage system according to the nominal charge rate and the battery capacity of the energy storage system; Based on the discharge current, determining the discharge voltage and discharge mode corresponding to the energy storage system.

8. The energy efficiency evaluation method according to any one of claims 1 to 7, characterized in that The evaluating the energy efficiency of the energy storage system according to the total energy absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load includes: Calculating the total amount absorbed by the energy storage system from an external power source according to the charging current, charging voltage and charging duration during the charging process of the energy storage system; Calculating the total energy released by the energy storage system to a load according to the discharge current, discharge voltage and discharge duration during the discharge process of the energy storage system; Calculating the ratio between the total amount absorbed by the energy storage system from an external power source and the total energy released by the energy storage system to a load to obtain the energy efficiency corresponding to the energy storage system.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, When the processor executes the program, it implements the steps of the energy efficiency evaluation method according to any one of claims 1-8.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, wherein when the computer program is executed by a processor, it implements the steps of the energy efficiency evaluation method according to any one of claims 1-8.

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