Modeling, simulation methods, devices, equipment, and storage media of battery energy storage systems

Abstract

The present invention provides a modeling and simulation method, device, equipment, and storage medium for a battery energy storage system. The modeling method includes: based on the battery energy storage system, creating a temperature adjustment device output evaluation module, a box internal and external environment heat exchange evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module, and a battery heat generation evaluation module; establishing a coupling relationship between the battery temperature evaluation module and the battery heat generation evaluation module, the box internal environment temperature evaluation module, the temperature adjustment device output evaluation module, and the box internal and external environment heat exchange evaluation module; according to each module, the input parameters and output parameters of each module, and the coupling relationship between each module, a simulation model of the battery energy storage system is generated, and the simulation model is used to evaluate the temperature-related change trend of the battery energy storage system under preset working conditions. By constructing a one-dimensional simulation model of the battery energy storage system, the present invention can reduce modeling time, simulation time, and computing resources.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a modeling and simulation method, device, equipment, and storage medium for a battery energy storage system. Background Art

[0002] Battery energy storage systems can be applied to power generation, grid, user, and microgrids. Battery energy storage systems need to operate within a preset temperature range to extend the battery life and ensure the battery's operating rate. Therefore, battery energy storage systems need to be equipped with air conditioners with appropriate output power to adjust the battery temperature.

[0003] In the prior art, a three-dimensional simulation model of a battery energy storage system can be established to simulate the temperature change of the battery energy storage system and obtain the temperature change trend of the battery cells of the battery energy storage system under specific working conditions. Users can configure appropriate air conditioning for the battery energy storage system based on the temperature change trend of the battery cells of the battery energy storage system under specific working conditions. When establishing a three-dimensional simulation model of a battery energy storage system, it is necessary to perform model pre-processing, grid division, solution calculation, post-processing and other operations on the box space where the battery energy storage system is located.

[0004] However, the method of modeling the battery energy storage system using the above-mentioned three-dimensional simulation model is labor-intensive, requires more computing resources, and takes a long time. In addition, it takes a long time to simulate different specific working conditions of the battery energy storage system using the three-dimensional simulation model. Summary of the invention

[0005] The present invention provides a modeling and simulation method, device, equipment and storage medium for a battery energy storage system to solve the technical problem that the modeling and simulation time of the battery energy storage system is long.

[0006] In a first aspect, the present invention provides a modeling method for a battery energy storage system, wherein the battery energy storage system is arranged in a box, and the box is provided with a temperature adjustment device for adjusting the internal ambient temperature of the box, comprising:

[0007] Based on the battery energy storage system, a temperature adjustment device output evaluation module, a box internal and external environment heat exchange evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat generation evaluation module are created, wherein the output is cooling capacity or heating capacity;

[0008] According to the influence relationship between the heat generated by the battery and the internal ambient temperature of the box on the battery temperature, a first coupling relationship is established between the battery temperature assessment module, the battery heat generation assessment module, and the internal ambient temperature assessment module of the box;

[0009] According to the influence relationship between the heat exchange amount of the internal and external environments of the box, the output of the temperature adjustment device, and the battery temperature on the internal ambient temperature of the box, a second coupling relationship is established between the internal ambient temperature assessment module of the box, the output assessment module of the temperature adjustment device, the heat exchange amount assessment module of the internal and external environments of the box, and the battery temperature assessment module;

[0010] A simulation model of the battery energy storage system is generated according to each module, the input parameters and output parameters of each module, the first coupling relationship and the second coupling relationship, and the simulation model is used to evaluate the temperature-related change trend of the battery energy storage system under preset working conditions.

[0011] Optionally, the temperature-related change trend includes at least one of the following:

[0012] The battery temperature change trend, the internal environment temperature change trend of the box, the output power change trend of the temperature adjustment device, the heat exchange trend of the internal and external environments of the box, and the heat generated by the battery.

[0013] Optionally, establishing a first coupling relationship between the battery temperature assessment module, the battery heat generation assessment module, and the box internal environment temperature assessment module according to the influence relationship between the heat generated by the battery, the box internal environment temperature, and the battery temperature includes:

[0014] According to the influence relationship between the heat generated by the battery, the internal ambient temperature of the box and the battery temperature, the heat generated by the battery output by the battery heat generation assessment module and the internal ambient temperature of the box output by the internal ambient temperature assessment module are used as input parameters of the battery temperature assessment module, and the battery temperature output by the battery temperature assessment module is used as the input parameter of the battery heat generation assessment module to obtain the first coupling relationship.

[0015] Optionally, the input parameters of the battery temperature evaluation module also include the thermal capacity of the battery and / or the heat dissipation coefficient of the battery.

[0016] Optionally, the input parameters of the battery heat generation assessment module also include: operating conditions of the battery energy storage system.

[0017] Optionally, the establishing of a second coupling relationship between the box internal environment temperature assessment module and the temperature adjustment device output assessment module, the box internal environment heat exchange assessment module, and the battery temperature assessment module according to the influence relationship between the box internal and external environment heat exchange, the temperature adjustment device output, the battery temperature, and the box internal environment temperature includes:

[0018] According to the influence relationship between the heat exchange amount of the internal and external environments of the box, the output of the temperature adjustment device, the battery temperature, and the internal environment temperature of the box, the battery temperature output by the battery temperature evaluation module, the temperature adjustment device output by the temperature adjustment device output evaluation module, and the internal and external environment heat exchange amount of the box output by the internal and external environment heat exchange amount evaluation module are used as input parameters of the internal environment temperature evaluation module of the box, and the internal environment temperature of the box output by the internal environment temperature evaluation module is used as an input parameter of the temperature adjustment device output evaluation module and the internal and external environment heat exchange amount evaluation module of the box, to obtain the second coupling relationship.

[0019] Optionally, the input parameter of the box internal environment temperature assessment module also includes the heat capacity of the air inside the box; or,

[0020] The density of the air, the volume of the air inside the box, and the specific heat capacity of the air.

[0021] Optionally, the input parameters of the temperature adjustment device output evaluation module also include at least one of the following:

[0022] Target temperature, output power, a first temperature difference threshold for determining whether the temperature adjustment device starts working, and a second temperature difference threshold for determining whether the temperature adjustment device stops working; the first temperature difference threshold is greater than the second temperature difference threshold, and the first temperature difference threshold and the second temperature difference threshold are both thresholds corresponding to the difference between the target temperature and the ambient temperature inside the box.

[0023] Optionally, the temperature adjustment device output evaluation module evaluates the temperature adjustment device output based on a fixed-frequency operating mode of the temperature adjustment device.

[0024] Optionally, the input parameters of the box internal and external environment heat exchange assessment module also include at least one of the following: the external environment temperature of the box, the internal and external heat exchange coefficients of the box, and the heat exchange area of ​​the box.

[0025] In a second aspect, the present invention provides a simulation method for a battery energy storage system, the method comprising:

[0026] Receive the operating condition of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the external environment temperature of the box;

[0027] According to the operating condition of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box, the simulation model of the battery energy storage system described in the first aspect is used to obtain the temperature-related change trend of the battery energy storage system;

[0028] Output the temperature-related change trend of the battery energy storage system.

[0029] In a third aspect, the present invention provides a modeling device for a battery energy storage system, wherein the battery energy storage system is arranged in a box, and the box is provided with a temperature adjustment device for adjusting the internal ambient temperature of the box, comprising:

[0030] A creation module is used to create a temperature adjustment device output evaluation module, a box internal and external environment heat exchange evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat generation evaluation module based on the battery energy storage system, wherein the output is cooling capacity or heating capacity;

[0031] A first establishing module, configured to establish a first coupling relationship between the battery temperature evaluation module, the battery heat generation evaluation module, and the box internal environment temperature evaluation module according to the influence relationship between the heat generated by the battery and the internal environment temperature of the box on the battery temperature;

[0032] A second establishing module is used to establish a second coupling relationship between the box internal environment temperature evaluation module and the temperature adjustment device output evaluation module, the box internal and external environment heat exchange evaluation module, and the battery temperature evaluation module according to the influence relationship of the heat exchange amount of the box internal and external environment, the output of the temperature adjustment device, and the battery temperature on the box internal environment temperature;

[0033] A generation module is used to generate a simulation model of the battery energy storage system according to each module, the input parameters and output parameters of each module, the first coupling relationship and the second coupling relationship; wherein the simulation model is used to evaluate the temperature-related change trend of the battery energy storage system under preset operating conditions.

[0034] In a fourth aspect, the present invention provides a simulation device for a battery energy storage system, the device comprising:

[0035] A receiving module, used to receive the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box;

[0036] an acquisition module, configured to acquire a temperature-related change trend of the battery energy storage system according to the operating condition of the battery energy storage system, the configuration of a temperature adjustment device provided in a box where the battery energy storage system is located, and a temperature parameter value of an external environment of the box, using the simulation model of the battery energy storage system as described in the first aspect;

[0037] The output module is used to output the temperature-related change trend of the battery energy storage system.

[0038] In a fifth aspect, the present invention provides an electronic device, comprising: at least one processor and a memory;

[0039] The memory stores computer-executable instructions;

[0040] The at least one processor executes the computer-executable instructions stored in the memory, so that the electronic device performs the method described in any one of the first aspect or any one of the second aspect.

[0041] In a sixth aspect, the present invention provides a computer-readable storage medium having computer execution instructions stored thereon. When the computer execution instructions are executed by a processor, the method described in any one of the first aspect or any one of the second aspect is implemented.

[0042] The modeling and simulation method, device, equipment, and storage medium of the battery energy storage system provided by the present invention create modules related to temperature changes according to the actual situation of the temperature interaction of the working environment of the battery energy storage system, and then establish the coupling relationship between the modules according to the influence relationship between the modules, thereby realizing the modeling of the battery energy storage system. This modeling method avoids the three-dimensional modeling of all objects inside the box where the battery energy storage system is located, and only needs to consider the interaction between the factors related to the temperature change of the battery energy storage system to perform one-dimensional modeling on the battery energy storage system. Therefore, the modeling method provided by the present invention does not require the calculation of a large amount of data, thereby achieving the technical effect of saving computing resources and reducing modeling time. Furthermore, when using the above-mentioned simulation model to simulate the battery energy storage system, compared with using a three-dimensional simulation model to simulate the battery energy storage system, the one-dimensional simulation process does not need to calculate a large amount of data, thereby achieving the technical effect of reducing the simulation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 A schematic diagram of a working environment of a battery energy storage system provided by the present invention;

[0045] Figure 2 A schematic diagram of a flow chart of a modeling method for a battery energy storage system provided by the present invention;

[0046] Figure 3 A schematic diagram of a simulation model of a battery energy storage system provided by the present invention;

[0047] Figure 4 A schematic diagram of a flow chart of a temperature control device output evaluation module for measuring the temperature control device output;

[0048] Figure 5 A schematic diagram of a simulation model of another battery energy storage system provided by the present invention;

[0049] Figure 6 A schematic diagram of a flow chart of a simulation method for a battery energy storage system provided by the present invention;

[0050] Figure 7 A schematic diagram of the structure of a modeling device for a battery energy storage system provided by the present invention;

[0051] Figure 8 A schematic diagram of the structure of a simulation device for a battery energy storage system provided by the present invention;

[0052] Fig. 9 The present invention provides a schematic diagram of the structure of an electronic device. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Figure 1 A schematic diagram of the working environment of a battery energy storage system provided by the present invention. Figure 1 As shown, the battery energy storage system of the present invention is arranged in a box, and the box can provide a closed working environment for the battery energy storage system. For example, the box can be a container, a building, etc. Exemplarily, the battery energy storage system includes a power conversion module, a battery pack (referred to as a battery in the present invention), and a battery management module. Among them, the power conversion module is used to exchange energy with the outside world; the battery pack is composed of a plurality of battery cells, which are used to realize the storage and release of electrical energy of the battery energy storage system; the battery management module is used to realize functions such as monitoring various states of each battery cell in the battery pack (such as voltage, current, etc.). It should be understood that Figure 1 The battery energy storage system shown in the figure is only one example of the structure of the battery energy storage system. In actual situations, the battery energy storage system can also be divided into other forms of modules.

[0055] When the battery energy storage system is working, if the working environment temperature of the battery is too high, the battery will produce irreversible reactions, causing the battery life to decay faster; if the working environment temperature of the battery is too low, the battery discharge capacity will decrease, and the discharge rate will decrease. For battery energy storage systems using lithium batteries, there may be a risk of lithium ion precipitation.

[0056] The box where the battery energy storage system is located is equipped with an air conditioner for adjusting the internal ambient temperature of the box so that the battery energy storage system can work within a suitable temperature range. Exemplarily, when the above-mentioned battery works at a large discharge rate for a long time, the heat generated by the battery will gradually increase, causing the battery temperature and the internal ambient temperature of the box to gradually rise. If the cooling capacity of the air conditioner in the box is less than the demand of the battery energy storage system at this time, the working ambient temperature of the battery may be too high. When the above-mentioned battery works at a small discharge rate for a long time, if the cooling capacity of the air conditioner in the box is greater than the demand of the battery energy storage system at this time, the working ambient temperature of the battery may be too low, or the air conditioner may be started and stopped frequently, resulting in a shortened life of the air conditioner. Therefore, it is crucial to configure the battery energy storage system with a suitable air conditioner.

[0057] Before configuring a suitable air conditioner for the battery energy storage system, the battery temperature variation trend in the battery energy storage system can be obtained through the simulation model of the battery energy storage system. Then, according to the battery temperature variation trend in the battery energy storage system, a suitable air conditioner can be configured for the battery energy storage system.

[0058] In the prior art, the temperature change of the battery energy storage system can be simulated by establishing a three-dimensional simulation model of the battery energy storage system. The modeling method of the three-dimensional simulation model requires model pre-processing, grid division, solution calculation, post-processing and other operations on the box space where the battery energy storage system is located.

[0059] Accordingly, when using the above three-dimensional simulation model to simulate the battery energy storage system, a large amount of computing resources is required and it takes a long time.

[0060] Considering that the reason why it takes a long time to model the battery energy storage system in the prior art is that it is necessary to perform three-dimensional modeling of all objects in the box where the battery energy storage system is located, the present invention proposes a modeling method for constructing a one-dimensional simulation model of the battery energy storage system by utilizing the temperature influence relationship between the various parts of the battery energy storage system. Compared with the three-dimensional modeling method in the prior art, the time used for modeling the battery energy storage system can be reduced. Accordingly, the time and computing resources used for simulation operations using a one-dimensional simulation model will also be reduced compared to simulation operations using a three-dimensional simulation model. In a specific implementation, the above method can be executed by an electronic device, which can be a server, terminal, or other device with processing functions.

[0061] Combine the following Figure 1 The working environment of the battery energy storage system shown in the figure is used to describe the technical solution of the present invention in detail using specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. It should be understood that in the above working environment, the device for adjusting the temperature of the working environment of the battery energy storage system can be called a temperature adjustment device. Including but not limited to air conditioners, fans and other devices with temperature adjustment functions.

[0062] Figure 2 A schematic diagram of a flow chart of a modeling method for a battery energy storage system provided by the present invention. Figure 2 As shown, the method comprises the following steps:

[0063] S101. Based on the battery energy storage system, create a temperature adjustment device output evaluation module, an internal and external environment heat exchange evaluation module, an internal environment temperature evaluation module, a battery temperature evaluation module, and a battery heat generation evaluation module.

[0064] Considering that when the battery energy storage system is actually working, the factors that cause the operating temperature of the battery in the battery energy storage system to change or the ambient temperature of the battery energy storage system to change include: the output of the temperature adjustment device, the heat exchange between the inside and outside of the box, the ambient temperature inside the box, the heat generated by the battery, etc. Therefore, the electronic device can create a temperature adjustment device output evaluation module, a box inside and outside environment heat exchange evaluation module, a box internal ambient temperature evaluation module, a battery temperature evaluation module, and a battery heat generation evaluation module to achieve a modeling process of the battery energy storage system that is closer to the actual operating conditions of the battery energy storage system, thereby improving the accuracy of the simulation model expression.

[0065] Among them, the temperature adjustment device output evaluation module is used to calculate the output of the temperature adjustment device in the box of the battery energy storage system under preset working conditions. Among them, when the temperature adjustment device plays a cooling role, the output can be the cooling capacity; when the temperature adjustment device plays a heating role, the output can be the heating capacity. The box internal and external environment heat exchange evaluation module is used to calculate the box internal and external environment heat exchange of the battery energy storage system under preset working conditions. The box internal environment temperature evaluation module is used to calculate the box internal environment temperature of the battery energy storage system under preset working conditions. The battery temperature evaluation module is used to calculate the battery temperature of the battery energy storage system under preset working conditions (the battery temperature in this embodiment can be the battery cell temperature, the two concepts are equivalent, and no distinction is made between them). The battery heat generation evaluation module is used to calculate the battery heat generation of the battery energy storage system under preset working conditions.

[0066] It should be understood that the modules created by the above electronic device based on the battery energy storage system are only for the convenience of explaining and introducing the modeling method. The present invention does not limit the division of the modules and the naming of the modules.

[0067] S102 , establishing a first coupling relationship between a battery temperature assessment module, a battery heat generation assessment module, and a box internal environment temperature assessment module according to the relationship between the heat generated by the battery and the influence of the box internal environment temperature on the battery temperature.

[0068] For example, the higher the ambient temperature inside the box, the higher the battery temperature; the higher the heat generated by the battery energy storage system itself, the higher the battery temperature. Figure 1 Taking the structure of the battery energy storage system shown in as an example, the heat generated by the battery energy storage system itself mainly comes from the heat generated by the battery. Correspondingly, the battery temperature will also affect the battery heat generation (for example, the higher the battery temperature, the lower the battery's heat generation power may be, which in turn leads to lower battery heat generation).

[0069] The electronic device can establish a first coupling relationship between the battery temperature assessment module, the battery heat generation assessment module, and the box internal environment temperature assessment module based on the influence of the above parameters on the battery temperature. The first coupling relationship represents the interaction of temperature-related parameters between the above three modules when simulating the preset working conditions of the battery energy storage system.

[0070] S103, according to the heat exchange of the internal and external environments of the box, the output of the temperature adjustment device, the battery temperature, and the influence relationship on the internal ambient temperature of the box, a second coupling relationship is established between the internal ambient temperature assessment module of the box and the output assessment module of the temperature adjustment device, the heat exchange of the internal and external environments of the box, and the battery temperature assessment module.

[0071] For example, the greater the amount of heat exchange between the internal and external environments of the box, the greater the impact of the external environment temperature on the internal environment temperature of the box. When the volume of the box in which the battery energy storage system is located is constant, the greater the output of the temperature adjustment device in the box, the faster the internal environment temperature of the box changes. The higher the battery temperature, the higher the internal environment temperature of the box. Correspondingly, the internal environment temperature of the box also affects the output of the temperature adjustment device and the amount of heat exchange between the internal and external environments of the box.

[0072] The electronic device can establish a second coupling relationship between the box internal environment temperature assessment module and the temperature adjustment device output assessment module, the box internal and external environment heat exchange assessment module, and the battery temperature assessment module based on the influence relationship of the above parameters on the box internal environment temperature. The second coupling relationship represents the interaction of temperature-related parameters between the above four modules under the preset working conditions of the simulated battery energy storage system.

[0073] S104: Generate a simulation model of the battery energy storage system according to each module, the input parameters and output parameters of each module, the first coupling relationship and the second coupling relationship.

[0074] In this embodiment, the first coupling relationship and the second coupling relationship can be used to establish an association between the effects of the modules on the temperature, so that the modules with the coupling relationship can accurately measure the variables related to the temperature under the preset operating conditions.

[0075] After the simulation model is generated in the above manner, when the battery energy storage system is simulated, the temperature adjustment device output evaluation module is used to calculate the output of the temperature adjustment device in the box of the battery energy storage system under preset working conditions. Among them, when the temperature adjustment device plays a cooling role, the output can be the cooling capacity; when the temperature adjustment device plays a heating role, the output can be the heating capacity. The box internal and external environment heat exchange evaluation module is used to calculate the box internal and external environment heat exchange of the battery energy storage system under preset working conditions. The box internal environment temperature evaluation module is used to calculate the box internal environment temperature of the battery energy storage system under preset working conditions. The battery temperature evaluation module is used to calculate the battery temperature of the battery energy storage system under preset working conditions (the battery temperature in this embodiment can be the battery cell temperature, the two concepts are equivalent, and no distinction is made between them). The battery heat generation evaluation module is used to calculate the battery heat generation of the battery energy storage system under preset working conditions.

[0076] The output parameters of each module can be determined according to the function of the module, and the input parameters of each module can be determined according to the way of affecting the change of the output parameters. Figure 3 A schematic diagram of a simulation model of a battery energy storage system provided by the present invention. Figure 3 In the simulation model shown, the input parameter of the temperature adjustment device output evaluation module is the ambient temperature inside the box, and the output parameter is the output of the temperature adjustment device. The input parameter of the box internal and external environment heat exchange evaluation module is the ambient temperature inside the box, and the output parameter is the ambient temperature inside the box. The input parameters of the box internal environment temperature evaluation module include: battery temperature, the output of the temperature adjustment device, the ambient heat exchange between the box and the external environment, and the output parameter is the ambient temperature inside the box. The input parameter of the battery heat generation evaluation module is the battery temperature, and the output parameter is the heat generated by the battery. The input parameters of the battery temperature evaluation module include: the ambient temperature inside the box, the heat generated by the battery, and the output parameters include: battery temperature.

[0077] The simulation model generated by this embodiment can obtain the temperature-related change trend of the battery energy storage system under the preset working conditions. Among them, the temperature-related change trend can include, for example, at least one of the following: battery temperature change trend, internal ambient temperature change trend of the box, temperature adjustment device output power change trend, internal and external ambient heat exchange trend of the box, and heat generated by the battery. Among them, the above-mentioned temperature-related change trend can be a change trend over time. In addition, the temperature adjustment device output power change trend can also be used to express the start and stop frequency of the temperature adjustment device.

[0078] In this implementation, the electronic device creates a module related to temperature changes according to the actual situation of the temperature interaction of the working environment of the battery energy storage system, and then establishes a coupling relationship between the modules according to the influence relationship between the modules, thereby realizing the modeling of the battery energy storage system. This modeling method avoids the three-dimensional modeling of all objects inside the box where the battery energy storage system is located, and only needs to consider the interaction between factors related to the temperature change of the battery energy storage system to perform one-dimensional modeling of the battery energy storage system. Therefore, the modeling method provided by the present invention does not require a large amount of data calculation, thereby achieving the technical effect of saving computing resources and reducing modeling time.

[0079] In addition, in the face of different battery energy storage systems, users can add or reduce modules related to temperature changes based on the above simulation model according to the actual composition and working environment of the battery energy storage system, that is, the modeling method has better scalability when facing different battery energy storage systems. For example, if the simulation model of the battery energy storage system constructed by the above one-dimensional modeling method is applied to the heat exchange system of the new energy power battery energy storage system, a coolant heat exchange evaluation module that affects temperature changes can be added on the basis of the above simulation model.

[0080] by Figure 1 As an example, refer to the working environment of the battery energy storage system shown above. Figure 3 The simulation model of the battery energy storage system shown in the figure provides an example of how each module in the simulation model of the battery energy storage system calculates its own output:

[0081] 1. Battery heat generation assessment module

[0082] Optionally, the battery heat generation evaluation module can obtain the heat generated by the battery through the following formula (0).

[0083] Q=I 2 ×R×Δt (0)

[0084] Wherein, I represents the charging or discharging current of the battery. Optionally, the charging or discharging current of the battery can be obtained through the operating condition of the battery energy storage system. Therefore, the input parameters of the battery heat generation evaluation module can also include the operating condition of the battery energy storage system.

[0085] R represents the internal resistance of the battery integrated in the battery heat generation evaluation module. For example, R can be integrated in the battery heat generation evaluation module in the form of an internal resistance matrix. Δt represents the duration of a data acquisition cycle of the battery energy storage system simulation model. For example, Δt can be 1 second, 2 seconds, etc. The data acquisition cycle mentioned here refers to the time interval between two adjacent outputs of each module.

[0086] Exemplarily, the battery heat generation assessment module can obtain the value of R through linear interpolation according to the battery state of charge (SOC) and the battery temperature. The battery heat generation assessment module can obtain the battery SOC by integrating the operating conditions of the above current I. When the SOC is 100%, it means that the battery is fully charged. Taking the rated capacity of the battery as 20A / h (ampere / hour) as an example, if the battery works at a discharge current of 20A for half an hour, the SOC value in this example is 50%.

[0087] Optionally, the battery heat generation assessment module may also store a correspondence table among the battery SOC, the battery temperature, and the battery internal resistance value in the battery heat generation assessment module, and then obtain the internal resistance value corresponding to the battery internal resistance R according to the above correspondence table.

[0088] It should be understood that the function of the battery heat generation assessment module is to measure the heat generation of the battery under the preset working conditions of the battery energy storage system. The above method is only a possible method proposed by the present invention for realizing the function of the battery heat generation assessment module. The present invention does not limit the implementation method of the battery heat generation assessment module. In specific implementation, the battery heat generation assessment module can also use other methods to realize its own functions. For example, the Thevenin single cell model can be used to simulate the battery heat generation to replace the battery heat generation assessment module in the present invention.

[0089] 2. Battery temperature assessment module

[0090] Optionally, the battery temperature evaluation module can obtain the battery temperature through the following formula (1).

[0091]

[0092] Among them, T cell_i represents the battery temperature of the ith data collection cycle of the battery energy storage system simulation model, Q _i-1 represents the heat generated by the battery output by the battery heat generation evaluation module in the i-1th data acquisition cycle; T cell_i-1 represents the battery temperature obtained by the battery temperature evaluation module in the i-1th data acquisition cycle; T air_i-1 represents the internal ambient temperature of the box output by the internal ambient temperature evaluation module of the box in the i-1th data collection cycle. h represents the heat dissipation coefficient of the battery, and C represents the thermal capacity of the battery.

[0093] h is determined by the arrangement and heat dissipation of the battery, and C can be determined by the properties of the battery itself. Exemplarily, h and C can be stored in the battery temperature evaluation module. Alternatively, h and / or C can also be determined by the user by calibrating both based on previous experimental data, and using them as input parameters of the battery temperature evaluation module to further improve the accuracy of the simulation model, thereby improving the accuracy of the simulation results obtained when the simulation model is used for subsequent simulation.

[0094] 3. Box internal environment temperature assessment module

[0095] Optionally, the box internal environment temperature assessment module can obtain the box internal environment temperature through formula (2).

[0096]

[0097] Among them, T air_i represents the internal ambient temperature of the box during the i-th data collection cycle, represents the output of the temperature adjustment device output by the temperature adjustment device output evaluation module in the i-1th data acquisition cycle, represents the heat exchange between the internal and external environment of the box output by the evaluation module of the heat exchange between the internal and external environment of the box in the i-1th data collection cycle, C air Represents the heat capacity of the air inside the box.

[0098] That is, the input parameter of the box internal environment temperature evaluation module may also include the heat capacity of the air inside the box. Alternatively, the specific heat capacity of the air may also be pre-stored in the box internal environment temperature evaluation module.

[0099] Optionally, the box internal environment temperature assessment module can obtain the box internal environment temperature through formula (3).

[0100]

[0101] Where ρ represents the air density inside the box, V represents the air volume inside the box, and C p Indicates the specific heat capacity of the air inside the box.

[0102] That is, the input parameters of the cabinet internal environment temperature assessment module may also include the density of air, the volume of air inside the cabinet, and the specific heat capacity of air.

[0103] 4. Heat exchange evaluation module for the internal and external environment of the box

[0104] Optionally, the heat exchange rate evaluation module for the internal and external environments of the cabinet can obtain the heat exchange rate for the internal and external environments of the cabinet through formula (4).

[0105] Q out =K×S×(Tout_i-1 -T air_i-1 )×Δt (4)

[0106] Among them, K represents the internal and external heat transfer coefficient of the box, S represents the heat transfer area of ​​the box (the area in contact between the box and the external air), T out_i-1 Indicates the external ambient temperature of the box in the i-1th cycle.

[0107] That is, the input parameters of the box internal and external environment heat exchange evaluation module may also include at least one of the following: the external environment temperature of the box, the internal and external heat exchange coefficient of the box, and the heat exchange area of ​​the box. For example, the internal and external heat exchange coefficient of the box and the heat exchange area of ​​the box are pre-stored in the box internal and external environment heat exchange evaluation module. At this time, the input parameter of the box internal and external environment heat exchange evaluation module may be the external environment temperature of the box.

[0108] It should be understood that the function of the internal and external environment heat exchange rate assessment module of the cabinet is to measure the internal and external environment heat exchange rate of the cabinet under the preset working conditions of the battery energy storage system. The above method is only a possible method proposed by the present invention for realizing the function of the internal and external environment heat exchange rate assessment module of the cabinet. The present invention does not limit the implementation method of the internal and external environment heat exchange rate assessment module of the cabinet.

[0109] In specific implementation, the box internal and external environment heat exchange assessment module can also use other methods to realize its own functions. For example, it can be expanded on the basis of the above box internal and external environment heat exchange assessment module to further consider the influence of factors such as radiation, convection and heat conduction on the internal environment temperature of the box, so that the modeling process of the battery energy storage system is closer to the actual operating conditions of the battery energy storage system, thereby improving the accuracy of the simulation model expression.

[0110] 5. Temperature adjustment device output evaluation module

[0111] Optionally, taking the fixed frequency working mode of the temperature adjustment device (the output power of the temperature adjustment device remains unchanged during operation, that is, the output of the temperature adjustment device is rated) as an example, Figure 4 The figure is a flow chart of the temperature adjustment device output evaluation module measuring the temperature adjustment device output. The target temperature refers to the target temperature of the internal ambient temperature of the box. Exemplarily, the target temperature can be used as an input parameter of the temperature adjustment device output evaluation module, or the temperature adjustment device output evaluation module can also calculate the target temperature through the battery temperature, so that the internal ambient temperature of the box can better meet the requirements of the battery working environment in actual situations.

[0112] ΔT represents the absolute value of the difference between the target temperature and the ambient temperature inside the box, and the first temperature difference threshold and the second temperature difference threshold are both thresholds corresponding to the difference between the target temperature and the ambient temperature inside the box. The first temperature difference threshold is used to determine whether the temperature adjustment device is started, and the second temperature difference threshold is used to determine whether the temperature adjustment device is stopped.

[0113] like Figure 4 As shown, if the ΔT is greater than the first temperature difference threshold, it means that the difference between the target temperature and the internal ambient temperature of the box is too large. For example, if the internal ambient temperature of the box is lower than the target temperature, and the difference between the target temperature and the internal ambient temperature of the box is greater than the first temperature difference threshold, it means that the internal ambient temperature of the box is too low, and the temperature adjustment device is controlled to start heating. When the temperature adjustment device output evaluation module determines that ΔT is less than the second temperature difference threshold, it means that the internal ambient temperature of the box meets the requirements of the battery energy storage system for the working ambient temperature, and the temperature adjustment device is controlled to stop working. If the temperature adjustment device output evaluation module determines that ΔT is greater than the second temperature difference threshold, it means that the internal ambient temperature of the box does not meet the requirements of the battery energy storage system for the working ambient temperature, and the temperature adjustment device is controlled to continue working. If ΔT is less than the second temperature difference threshold, it means that the internal ambient temperature of the box meets the requirements of the battery energy storage system for the working ambient temperature, and the temperature adjustment device is controlled to remain in standby mode.

[0114] like Figure 4 As shown, when the temperature adjustment device is in fixed frequency working mode, in the i-th data acquisition cycle of the simulation model, if the temperature adjustment device is in working state, the output of the temperature adjustment device in the i-th data acquisition cycle is the rated output of the temperature adjustment device. If the temperature adjustment device is in standby state, the output of the temperature adjustment device in the i-th data acquisition cycle is 0. In addition, the temperature adjustment device output evaluation module can also record the time when the temperature adjustment device starts and stops working, which is used to describe the start and stop frequency of the temperature adjustment device.

[0115] It should be understood that the temperature adjustment device output evaluation module may also evaluate the temperature adjustment device output in other ways, and the present invention does not limit the internal control logic of the temperature adjustment device output evaluation module.

[0116] Taking the variable frequency working mode of the temperature adjustment device as an example, the output evaluation module of the temperature adjustment device can measure the output of the temperature adjustment device in the following manner. Among them, the variable frequency working mode means that the output power of the temperature adjustment device changes with the difference between the target temperature and the internal ambient temperature of the box. For example, the closer ΔT is to the first temperature difference threshold, the smaller the output power of the temperature adjustment device; the greater the difference between ΔT and the first temperature difference threshold, the greater the output power of the temperature adjustment device. In the i-th data acquisition cycle of the simulation model, the output of the temperature adjustment device obtained by the output evaluation module of the temperature adjustment device corresponds to the output power of the temperature adjustment device at this time, which can be specifically determined according to the output power.

[0117] Therefore, the input parameters of the temperature adjustment device output evaluation module may also include at least one of the following: target temperature, output power, a first temperature difference threshold for determining whether the temperature adjustment device starts working, and a second temperature difference threshold for determining whether the temperature adjustment device stops working. Alternatively, these parameters are preset in the temperature adjustment device output evaluation module.

[0118] Reference Figure 3 Taking the heat dissipation coefficient of the battery, the heat capacity of the battery, the operating conditions, the heat capacity of the air inside the box, the internal and external heat exchange coefficients of the box, the heat exchange area of ​​the box, the target temperature, the output power, the first temperature difference threshold, and the second temperature difference threshold as input parameters of the corresponding modules as an example, based on the specific implementation methods of the above modules, and the above first coupling relationship and second coupling relationship, the simulation model of the battery energy storage system obtained by the electronic device can be as follows Figure 5 As shown. Among them, Figure 5 A schematic diagram of a simulation model of another battery energy storage system provided by the present invention.

[0119] It should be understood that when the above simulation model is used to simulate the battery energy storage system, the simulation model can obtain the temperature-related change trend through multiple rounds of measurement. Each round represents a data collection cycle mentioned above. That is, one module output is a data collection cycle.

[0120] For example, the input parameters required by the above-mentioned models can be input into the simulation model when the simulation model is started for simulation, or some parameters of some models can be preset into the module when the simulation model is constructed. For example, the input parameters of the box internal and external environment heat exchange evaluation module include the internal and external heat exchange coefficient of the box, the heat exchange area of ​​the box, etc.

[0121] After the simulation model is obtained by any of the above methods, the electronic device can use the simulation model to obtain simulation results of the battery energy storage system under different operating conditions. Figure 6The figure is a flow chart of a simulation method of a battery energy storage system provided by the present invention. Figure 6 As shown, the method comprises the following steps:

[0122] S201, receiving the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box.

[0123] Exemplarily, the electronic device may receive the above parameter values ​​through an application program interface (API) or a graphical user interface (GUI).

[0124] S202. According to the operating condition of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box, using any one of the above simulation models of the battery energy storage system, obtain the temperature-related change trend of the battery energy storage system.

[0125] After obtaining the above parameter values, the electronic device can input the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device set in the box where the battery energy storage system is located, and the parameter value of the external ambient temperature of the box into the simulation model, so that the simulation model simulates the battery energy storage system based on this information. In addition, the electronic device can also obtain the values ​​of other input parameters of each module in the simulation model and input them into the simulation model, so that the simulation model simulates the battery energy storage system based on this information, which can be determined specifically according to the parameter values ​​required to be input when the simulation model performs simulation operations.

[0126] Then, the electronic device obtains a temperature-related change trend through any of the above-mentioned simulation models of the battery energy storage system. The temperature-related change trend may include any one or more of step S104.

[0127] S203. Output the temperature-related change trend of the battery energy storage system.

[0128] Taking the temperature change trend as the battery temperature change trend as an example, through the simulation model, the electronic device can obtain the battery temperature change trend over time under specific working conditions of the battery energy storage system, and output the battery temperature change trend over time. Exemplarily, the user can observe whether the battery temperature is always within the preset temperature range through the battery temperature change trend over time. Assuming that the battery temperature continues to rise until it exceeds the preset temperature range and there is still no downward trend, it means that the output of the temperature adjustment device configured for the battery energy storage system is too small and does not meet the temperature regulation of the battery energy storage system. That is, the user can configure a suitable temperature adjustment device for the battery energy storage system based on the simulation results, and the simulation results can also provide guidance and optimization for the use conditions of the battery energy storage system, so that the temperature change of the working environment of the battery energy storage system is more stable. In addition, the above simulation results can also provide assistance for the development of thermal management solutions for battery energy storage systems, life prediction and value assessment of battery energy storage systems.

[0129] In this embodiment, when the electronic device uses the above-mentioned simulation model to simulate the battery energy storage system, compared with simulating the battery energy storage system using a three-dimensional simulation model, the one-dimensional simulation process does not need to calculate a large amount of data, thereby achieving the technical effect of reducing the simulation time.

[0130] Figure 7 This is a schematic diagram of the structure of a modeling device for a battery energy storage system provided by the present invention. Figure 7 As shown, the device comprises:

[0131] The creation module 31 is used to create a temperature adjustment device output evaluation module, an internal and external environment heat exchange evaluation module, an internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat generation evaluation module based on the battery energy storage system, wherein the output is cooling capacity or heating capacity.

[0132] The first establishing module 32 is used to establish a first coupling relationship between the battery temperature assessment module, the battery heat generation assessment module, and the box internal environment temperature assessment module according to the influence relationship between the heat generated by the battery, the internal environment temperature of the box, and the battery temperature.

[0133] The second establishing module 33 is used to establish a second coupling relationship between the internal environment temperature evaluation module of the box and the output evaluation module of the temperature adjustment device, the internal and external environment heat exchange evaluation module of the box, and the battery temperature evaluation module according to the influence relationship between the heat exchange of the internal and external environment of the box, the output of the temperature adjustment device, the battery temperature, and the internal environment temperature of the box.

[0134] A generation module 34 is used to generate a simulation model of the battery energy storage system according to each module, the input parameters and output parameters of each module, the first coupling relationship and the second coupling relationship; wherein the simulation model is used to evaluate the temperature-related change trend of the battery energy storage system under preset operating conditions.

[0135] Optionally, the temperature-related change trend includes at least one of the following: battery temperature change trend, internal environment temperature change trend of the box, output power change trend of the temperature adjustment device, heat exchange amount change trend of the internal and external environments of the box, and heat change trend generated by the battery.

[0136] Optionally, the first establishing module 32 is specifically used to use the heat generated by the battery output by the battery heat generation evaluation module and the internal ambient temperature of the box output by the internal ambient temperature evaluation module as input parameters of the battery temperature evaluation module, and use the battery temperature output by the battery temperature evaluation module as the input parameter of the battery heat generation evaluation module, according to the influence relationship between the heat generated by the battery, the internal ambient temperature of the box and the battery temperature, to obtain the first coupling relationship.

[0137] Optionally, the input parameters of the battery temperature evaluation module also include the thermal capacity of the battery and / or the heat dissipation coefficient of the battery.

[0138] Optionally, the input parameters of the battery heat generation assessment module also include: operating conditions of the battery energy storage system.

[0139] Optionally, the second establishing module 33 is specifically used to use the battery temperature output by the battery temperature evaluation module, the temperature adjustment device output output by the temperature adjustment device output evaluation module, and the box internal environment heat exchange rate output by the box internal environment heat exchange rate evaluation module as input parameters of the box internal environment temperature evaluation module, and use the box internal environment temperature output by the box internal environment temperature evaluation module as input parameters of the temperature adjustment device output evaluation module and the box internal environment heat exchange rate evaluation module, to obtain the second coupling relationship.

[0140] Optionally, the input parameters of the cabinet internal environment temperature assessment module also include the heat capacity of the air inside the cabinet.

[0141] Optionally, the input parameters of the temperature adjustment device output evaluation module also include at least one of the following: target temperature, output power, a first temperature difference threshold for determining whether the temperature adjustment device starts working, and a second temperature difference threshold for determining whether the temperature adjustment device stops working; the first temperature difference threshold is greater than the second temperature difference threshold, and the first temperature difference threshold and the second temperature difference threshold are both thresholds corresponding to the difference between the target temperature and the ambient temperature inside the box.

[0142] Optionally, the temperature adjustment device output evaluation module evaluates the temperature adjustment device output based on a fixed-frequency operating mode of the temperature adjustment device.

[0143] Optionally, the input parameters of the box internal and external environment heat exchange assessment module also include at least one of the following: the external environment temperature of the box, the internal and external heat exchange coefficients of the box, and the heat exchange area of ​​the box.

[0144] The modeling device of the battery energy storage system provided by the present invention is used to execute the embodiment of the aforementioned modeling method. Its implementation principle and technical effect are similar and will not be described in detail.

[0145] Figure 8 This is a schematic diagram of the structure of a simulation device for a battery energy storage system provided by the present invention. Figure 8 As shown, the device comprises:

[0146] The receiving module 41 is used to receive the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box.

[0147] The acquisition module 42 is used to obtain the temperature-related change trend of the battery energy storage system using any of the above-mentioned simulation models of the battery energy storage system according to the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device set in the box where the battery energy storage system is located, and the parameter value of the external ambient temperature of the box.

[0148] The output module 43 is used to output the temperature-related change trend of the battery energy storage system.

[0149] The simulation device of the battery energy storage system provided by the present invention is used to execute the above-mentioned simulation method embodiment. Its implementation principle and technical effect are similar and will not be described in detail.

[0150] Fig. 9 This is a schematic diagram of the structure of an electronic device provided by the present invention. Fig. 9 As shown, the electronic device 50 may include: at least one processor 51 and a memory 52 .

[0151] The memory 52 is used to store programs. Specifically, the programs may include program codes, and the program codes include computer operation instructions.

[0152] The memory 52 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0153] The processor 51 is used to execute the computer execution instructions stored in the memory 52 to implement the modeling or simulation method of the battery energy storage system. The processor 51 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention.

[0154] Optionally, the electronic device 50 may further include a communication interface 53. In a specific implementation, if the communication interface 53, the memory 52 and the processor 51 are implemented independently, the communication interface 53, the memory 52 and the processor 51 may be interconnected through a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0155] Optionally, in a specific implementation, if the communication interface 53, the memory 52 and the processor 51 are integrated on a chip, the communication interface 53, the memory 52 and the processor 51 can communicate through an internal interface.

[0156] The present invention also provides a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores program instructions, and the program instructions are used for the methods in the above embodiments.

[0157] The present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one processor of an electronic device can read the execution instruction from the readable storage medium, and at least one processor executes the execution instruction so that the electronic device implements the modeling or simulation method of the battery energy storage system provided by the various embodiments described above.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modeling method for a battery energy storage system, characterized in that: The battery energy storage system is arranged in a box, and the box is provided with a temperature adjustment device for adjusting the internal ambient temperature of the box, including: Based on the battery energy storage system, a temperature adjustment device output evaluation module, a box internal and external environment heat exchange evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat generation evaluation module are created, wherein the output is cooling capacity or heating capacity; According to the influence relationship between the heat generated by the battery and the internal ambient temperature of the box on the battery temperature, a first coupling relationship is established between the battery temperature assessment module, the battery heat generation assessment module, and the internal ambient temperature assessment module of the box; According to the influence relationship between the heat exchange amount of the internal and external environments of the box, the output of the temperature adjustment device, and the battery temperature on the internal ambient temperature of the box, a second coupling relationship is established between the internal ambient temperature assessment module of the box, the output assessment module of the temperature adjustment device, the heat exchange amount assessment module of the internal and external environments of the box, and the battery temperature assessment module; According to a first coupling relationship between the battery temperature assessment module and the battery heat generation assessment module and the box internal environment temperature assessment module, and a second coupling relationship between the box internal environment temperature assessment module and the temperature adjustment device output assessment module, the box internal and external environment heat exchange assessment module, and the battery temperature assessment module, an association is established between the battery temperature assessment module, the battery heat generation assessment module, the box internal environment temperature assessment module, the temperature adjustment device output assessment module, and the box internal and external environment heat exchange assessment module regarding the influence on temperature, and a simulation model of the battery energy storage system is generated. The simulation model is used to evaluate a temperature-related change trend of the battery energy storage system under preset operating conditions.

2. The method according to claim 1, characterized in that The temperature-related variation trend includes at least one of the following: The battery temperature change trend, the internal environment temperature change trend of the box, the output power change trend of the temperature adjustment device, the heat exchange trend of the internal and external environments of the box, and the heat generated by the battery.

3. The method according to claim 1 or 2, characterized in that: The establishing of a first coupling relationship between the battery temperature assessment module, the battery heat generation assessment module, and the box internal environment temperature assessment module according to the influence relationship between the heat generated by the battery, the box internal environment temperature, and the battery temperature includes: According to the influence relationship between the heat generated by the battery, the internal ambient temperature of the box and the battery temperature, the heat generated by the battery output by the battery heat generation assessment module and the internal ambient temperature of the box output by the internal ambient temperature assessment module are used as input parameters of the battery temperature assessment module, and the battery temperature output by the battery temperature assessment module is used as the input parameter of the battery heat generation assessment module to obtain the first coupling relationship.

4. The method according to claim 3, characterized in that The input parameters of the battery temperature evaluation module also include the thermal capacity of the battery and / or the heat dissipation coefficient of the battery.

5. The method according to claim 3, characterized in that: The input parameters of the battery heat generation assessment module also include: the operating conditions of the battery energy storage system.

6. The method according to any one of claims 1 or 2, characterized in that: The second coupling relationship between the box internal environment temperature assessment module and the temperature adjustment device output assessment module, the box internal environment heat exchange assessment module, and the battery temperature assessment module is established according to the influence relationship between the box internal and external environment heat exchange, the temperature adjustment device output assessment module, the battery temperature, and the box internal environment temperature, including: According to the influence relationship between the heat exchange amount of the internal and external environments of the box, the output of the temperature adjustment device, the battery temperature, and the internal environment temperature of the box, the battery temperature output by the battery temperature evaluation module, the temperature adjustment device output by the temperature adjustment device output evaluation module, and the internal and external environment heat exchange amount of the box output by the internal and external environment heat exchange amount evaluation module are used as input parameters of the internal environment temperature evaluation module of the box, and the internal environment temperature of the box output by the internal environment temperature evaluation module is used as an input parameter of the temperature adjustment device output evaluation module and the internal and external environment heat exchange amount evaluation module of the box, to obtain the second coupling relationship.

7. The method according to claim 6, characterized in that The input parameters of the box internal environment temperature assessment module also include the air heat capacity inside the box; or, The density of the air, the volume of the air inside the box, and the specific heat capacity of the air.

8. The method according to claim 6, characterized in that The input parameters of the temperature adjustment device output evaluation module also include at least one of the following: Target temperature, output power, a first temperature difference threshold for determining whether the temperature adjustment device starts working, and a second temperature difference threshold for determining whether the temperature adjustment device stops working; the first temperature difference threshold is greater than the second temperature difference threshold, and the first temperature difference threshold and the second temperature difference threshold are both thresholds corresponding to the difference between the target temperature and the ambient temperature inside the box.

9. The method according to claim 6, characterized in that The temperature adjustment device output evaluation module evaluates the temperature adjustment device output based on a fixed-frequency operation mode of the temperature adjustment device.

10. The method according to claim 6, characterized in that The input parameters of the box internal and external environment heat exchange evaluation module also include at least one of the following: the external environment temperature of the box, the internal and external heat exchange coefficients of the box, and the heat exchange area of ​​the box.

11. A simulation method for a battery energy storage system, characterized in that: The method comprises: Receive the operating condition of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the external environment temperature of the box; According to the operating condition of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box, using the simulation model of the battery energy storage system according to any one of claims 1 to 9, the change trend of the battery energy storage system related to the temperature is obtained; Output the temperature-related change trend of the battery energy storage system.

12. A modeling device for a battery energy storage system, characterized in that: The battery energy storage system is arranged in a box, and the box is provided with a temperature adjustment device for adjusting the internal ambient temperature of the box, including: A creation module is used to create a temperature adjustment device output evaluation module, a box internal and external environment heat exchange evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat generation evaluation module based on the battery energy storage system, wherein the output is cooling capacity or heating capacity; A first establishing module, configured to establish a first coupling relationship between the battery temperature evaluation module, the battery heat generation evaluation module, and the box internal environment temperature evaluation module according to the influence relationship between the heat generated by the battery and the internal environment temperature of the box on the battery temperature; A second establishing module is used to establish a second coupling relationship between the box internal environment temperature evaluation module and the temperature adjustment device output evaluation module, the box internal and external environment heat exchange evaluation module, and the battery temperature evaluation module according to the influence relationship of the heat exchange amount of the box internal and external environment, the output of the temperature adjustment device, and the battery temperature on the box internal environment temperature; A generation module is used to establish an association between the influence of the battery temperature assessment module, the battery heat generation assessment module, the box internal environment temperature assessment module, the temperature adjustment device output assessment module, and the box internal environment heat exchange assessment module on temperature according to a first coupling relationship between the battery temperature assessment module and the battery heat generation assessment module and the box internal environment temperature assessment module, and a second coupling relationship between the box internal environment temperature assessment module and the temperature adjustment device output assessment module, the box internal and external environment heat exchange assessment module, and the battery temperature assessment module, so as to generate a simulation model of the battery energy storage system; wherein the simulation model is used to evaluate the temperature-related change trend of the battery energy storage system under preset working conditions.

13. A simulation device for a battery energy storage system, characterized in that: The device comprises: A receiving module, used to receive the operating conditions of the battery energy storage system, the configuration of the temperature adjustment device provided in the box where the battery energy storage system is located, and the parameter value of the ambient temperature outside the box; an acquisition module, configured to acquire a temperature-related change trend of the battery energy storage system according to the operating condition of the battery energy storage system, the configuration of a temperature adjustment device provided in a box where the battery energy storage system is located, and a temperature parameter value of an external environment of the box, using the simulation model of the battery energy storage system according to any one of claims 1 to 9; The output module is used to output the temperature-related change trend of the battery energy storage system.

14. An electronic device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the electronic device performs the method according to any one of claims 1 to 11.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method described in any one of claims 1 to 11 is implemented.

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