CN114491909A - Modeling and simulation method, device, equipment and storage medium of battery energy storage system - Google Patents
Modeling and simulation method, device, equipment and storage medium of battery energy storage system Download PDFInfo
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Abstract
The invention provides a modeling and simulation method, a device, equipment and a storage medium of a battery energy storage system. The modeling method comprises the following steps: based on a battery energy storage system, a temperature adjusting device output quantity evaluation module, a box internal and external environment heat exchange quantity evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat production evaluation module are created; establishing a coupling relation among a battery temperature evaluation module, a battery heat production evaluation module, a box body internal environment temperature evaluation module, a temperature adjusting device output quantity evaluation module and a box body internal and external environment heat exchange quantity evaluation module; and generating a simulation model of the battery energy storage system according to the modules, the input parameters and the output parameters of the modules and the coupling relation among the modules, wherein the simulation model is used for evaluating the temperature-related change trend of the battery energy storage system under the preset working condition. According to the invention, the modeling time, the simulation time and the computing resources can be reduced by constructing the one-dimensional simulation model of the battery energy storage system.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a modeling and simulation method, a device, equipment and a storage medium of a battery energy storage system.
Background
The battery energy storage system can be applied to the fields of power generation side, power grid side, user side, micro-grid and the like. The battery energy storage system needs to work within a preset temperature range so as to prolong the service life of the battery and guarantee the operation multiplying power of the battery. Therefore, the battery energy storage system needs to be provided with an air conditioner with appropriate output power so as to adjust the temperature of the battery.
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, and the change trend of the cell temperature of the battery energy storage system under a specific working condition is obtained. The user can configure a proper air conditioner for the battery energy storage system according to the variation trend of the battery core temperature of the battery energy storage system under a specific working condition. When a three-dimensional simulation model of the battery energy storage system is established, operations such as model pre-processing, grid division, solving calculation, post-processing and the like need to be carried out on a box body space where the battery energy storage system is located.
However, the method for modeling the battery energy storage system by using the three-dimensional simulation model has the disadvantages of large workload, occupation of more computing resources and long time consumption, and in addition, the three-dimensional simulation model needs a long time to simulate different specific working conditions of the battery energy storage system.
Disclosure of Invention
The invention provides a modeling and simulation method, a device, equipment and a storage medium of a battery energy storage system, and aims to solve the technical problem of long modeling and simulation time of the battery energy storage system.
In a first aspect, the present invention provides a modeling method for a battery energy storage system, where the battery energy storage system is disposed in a box, and the box is provided with a temperature adjustment device for adjusting an internal ambient temperature of the box, the method including:
based on the battery energy storage system, an output quantity evaluation module of the temperature adjusting device, an internal and external environment heat exchange quantity evaluation module of the box body, an internal environment temperature evaluation module of the box body, a battery temperature evaluation module and a battery heat production evaluation module are created, wherein the output quantity is refrigerating quantity or heating quantity;
establishing a first coupling relation among the battery temperature evaluation module, the battery heat generation evaluation module and the box internal environment temperature evaluation module according to the influence relation of the heat generated by the battery and the box internal environment temperature on the battery temperature;
establishing a second coupling relation between the internal environment temperature evaluation module of the box body and the output quantity evaluation module of the temperature adjusting device, the internal and external environment heat exchange quantity evaluation module of the box body and the battery temperature evaluation module according to the influence relation of the heat exchange quantity of the internal and external environments of the box body, the output quantity of the temperature adjusting device and the battery temperature on the internal environment temperature of the box body;
and generating a simulation model of the battery energy storage system according to the modules, the input parameters and the output parameters of the modules, the first coupling relation and the second coupling relation, wherein the simulation model is used for evaluating the temperature-related variation trend of the battery energy storage system under a preset working condition.
Optionally, the temperature-related trend of change includes at least one of:
the temperature control device comprises a battery temperature variation trend, a box body internal environment temperature variation trend, a temperature adjusting device output power variation trend, a box body internal and external environment heat exchange quantity variation trend and a battery generated heat variation trend.
Optionally, the establishing a first coupling relationship between the battery temperature evaluation module and the battery heat generation evaluation module and between the battery temperature evaluation module and the box internal environment temperature evaluation module according to the influence relationship between the heat generated by the battery and the box internal environment temperature and the battery temperature includes:
according to the influence relationship among the heat generated by the battery, the internal environment temperature of the box and the battery temperature, the first coupling relationship is obtained by taking the heat generated by the battery and output by the battery heat generation evaluation module, the internal environment temperature of the box and output by the internal environment temperature evaluation module as input parameters of the battery temperature evaluation module, and the battery temperature output by the battery temperature evaluation module as input parameters of the battery heat generation evaluation module.
Optionally, the input parameter of the battery temperature evaluation module further includes a heat capacity of the battery and/or a heat dissipation coefficient of the battery.
Optionally, the input parameters of the battery heat production evaluation module further include: and the operation condition of the battery energy storage system.
Optionally, the establishing a second coupling relationship between the box internal environment temperature evaluation module and the temperature adjustment device output quantity evaluation module, the box internal and external environment heat exchange quantity evaluation module, and the battery temperature evaluation module according to the influence relationship among the heat exchange quantity of the box internal and external environments, the temperature adjustment device output quantity, the battery temperature, and the box internal environment temperature includes:
according to the influence relation among the heat exchange quantity of the inner environment and the outer environment of the box body, the output quantity of the temperature adjusting device, the battery temperature and the internal environment temperature of the box body, the battery temperature output by the battery temperature evaluation module, the output quantity of the temperature adjusting device output quantity output by the temperature adjusting device output quantity evaluation module and the internal and external environment heat exchange quantity output by the internal and external environment heat exchange quantity evaluation module of the box body are used as input parameters of the internal environment temperature evaluation module of the box body, and the internal environment temperature output by the internal environment temperature evaluation module of the box body is used as the input parameters of the temperature adjusting device output quantity evaluation module and the internal and external environment heat exchange quantity evaluation module of the box body, so that the second coupling relation is obtained.
Optionally, the input parameter of the tank internal environment temperature evaluation module further includes air heat capacity inside the tank; alternatively, the first and second electrodes may be,
density of air, volume of air inside the box, and specific heat capacity of air.
Optionally, the input parameters of the output quantity evaluation module of the temperature adjustment device further include at least one of the following:
the temperature control device comprises a target temperature, output power, a first temperature difference threshold value for judging whether the temperature adjusting device starts to work or not and a second temperature difference threshold value for judging whether the temperature adjusting device stops working or not; the first temperature difference threshold value is larger than the second temperature difference threshold value, and the first temperature difference threshold value and the second temperature difference threshold value are both the target temperature and the threshold value corresponding to the difference value of the internal environment temperature of the box body.
Optionally, the output quantity evaluation module of the temperature adjustment device evaluates the output quantity of the temperature adjustment device based on the fixed-frequency working mode of the temperature adjustment device.
Optionally, the input parameters of the inside and outside environment heat exchange amount evaluation module of the box body further include at least one of the following: the heat exchange device comprises a box body, an external environment temperature of the box body, internal and external heat exchange coefficients of the box body and a heat exchange area of the box body.
In a second aspect, the present invention provides a simulation method for a battery energy storage system, the method comprising:
receiving the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located, and the external environment temperature parameter value of the box body;
acquiring a temperature-related change trend of the battery energy storage system by utilizing the simulation model of the battery energy storage system in the first aspect according to the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box where the battery energy storage system is located and the external environment temperature parameter value of the box;
and outputting the temperature-related variation trend of the battery energy storage system.
In a third aspect, the present invention provides a modeling apparatus for a battery energy storage system, where the battery energy storage system is disposed in a box, and the box is provided with a temperature adjustment apparatus for adjusting an internal ambient temperature of the box, the modeling apparatus comprising:
the battery energy storage system comprises a creation module, a temperature adjustment device output quantity evaluation module, a box internal and external environment heat exchange quantity evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat production evaluation module, wherein the output quantity is refrigerating quantity or heating quantity;
the first establishing module is used for establishing a first coupling relation among the battery temperature evaluation module, the battery heat generation evaluation module and the box internal environment temperature evaluation module according to the influence relation of the heat generated by the battery and the box internal environment temperature on the battery temperature;
the second establishing module is used for establishing a second coupling relation between the internal box environment temperature evaluation module and the output quantity evaluation module of the temperature adjusting device, the internal and external box environment heat exchange quantity evaluation module and the battery temperature evaluation module according to the influence relation of the heat exchange quantity of the internal and external box environments, the output quantity of the temperature adjusting device and the battery temperature on the internal box environment temperature;
the generating module is used for generating a simulation model of the battery energy storage system according to the input parameters and the output parameters of the modules, the first coupling relation and the second coupling relation; the simulation model is used for evaluating the temperature-related variation trend of the battery energy storage system under a preset working condition.
In a fourth aspect, the present invention provides a simulation apparatus for a battery energy storage system, the apparatus comprising:
the receiving module is used for receiving the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body;
the acquisition module is used for acquiring the temperature-related change trend of the battery energy storage system by utilizing the simulation model of the battery energy storage system according to the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body;
and the output module is used for outputting the temperature-related variation trend of the battery energy storage system.
In a fifth aspect, the present invention provides an electronic device, comprising: at least one processor, a memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored by the memory to cause the electronic device to perform the method of any of the first or second aspects.
In a sixth aspect, the present invention provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement the method of any one of the first or second aspects.
According to the modeling and simulation method, device, equipment and storage medium of the battery energy storage system, the modules related to temperature change are created according to the actual condition of temperature interaction of the working environment of the battery energy storage system, and then the coupling relation among the modules is established according to the influence relation among the modules, so that the modeling of the battery energy storage system is realized. The modeling method avoids three-dimensional modeling of all objects in the box body where the battery energy storage system is located, and only interaction among factors related to temperature change of the battery energy storage system needs to be considered to perform one-dimensional modeling on the battery energy storage system, so that the modeling method provided by the invention does not need to calculate a large amount of data, and further achieves the technical effects of saving calculation resources and reducing modeling time. Furthermore, when the battery energy storage system is simulated by using the simulation model, compared with the simulation of the battery energy storage system by using a three-dimensional simulation model, the one-dimensional simulation process does not need to calculate a large amount of data, and the technical effect of reducing the simulation time is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings needed to be used in the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
Fig. 1 is a schematic diagram of a working environment of a battery energy storage system according to the present invention;
FIG. 2 is a schematic flow chart of a modeling method of a battery energy storage system according to the present invention;
FIG. 3 is a schematic diagram of a simulation model of a battery energy storage system according to the present invention;
FIG. 4 is a schematic view illustrating a process of measuring and calculating an output of the temperature adjustment device by the output evaluation module of the temperature adjustment device;
FIG. 5 is a schematic diagram of a simulation model of another battery energy storage system provided by the present invention;
fig. 6 is a schematic flow chart of a simulation method of a battery energy storage system according to the present invention;
FIG. 7 is a schematic structural diagram of a modeling apparatus of a battery energy storage system according to the present invention;
fig. 8 is a schematic structural diagram of a simulation apparatus of a battery energy storage system according to the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of a working environment of a battery energy storage system according to the present invention. As shown in fig. 1, the battery energy storage system of the present invention is disposed in a box, and the box can provide a sealed working environment for the battery energy storage system. For example, the enclosure may be a container, a building, or the like. Illustratively, the battery energy storage system comprises a power conversion module, a battery pack (which is simply referred to as a battery in the invention) and a battery management module. The power conversion module is used for exchanging energy with the outside; the battery pack is composed of a plurality of battery monomers and is used for realizing the storage and release of the electric energy of the battery energy storage system; the battery management module is used for realizing functions of monitoring various states (such as voltage, current and the like) of each battery cell in the battery pack. It should be understood that the battery energy storage system shown in fig. 1 is only one example of the structure of the battery energy storage system, and in practical cases, other forms of module division can be performed on the battery energy storage system.
When the battery energy storage system works, if the working environment temperature of the battery is too high, the battery generates an irreversible reaction, so that the service life of the battery is shortened; if the temperature of the working environment of the battery is too low, the discharge capacity of the battery is reduced, and the discharge rate is reduced. For battery energy storage systems that employ lithium batteries, the lithium batteries may also have a risk of lithium ion evolution.
And an air conditioner for adjusting the internal environment temperature of the box body is arranged in the box body where the battery energy storage system is positioned, so that the battery energy storage system can work within a proper temperature range. For example, when the battery operates at a large discharge rate for a long time, the heat generated by the battery will gradually increase, which causes the temperature of the battery and the internal environment temperature of the box to gradually increase, and if the cooling capacity of the air conditioner in the box is less than the requirement of the battery energy storage system, the operating environment temperature of the battery may be too high. When the battery works with a small discharge rate for a long time, if the refrigerating capacity of the air conditioner in the box body is larger than the requirement of the battery energy storage system, the temperature of the working environment of the battery may be too low, or the air conditioner may be frequently started and stopped, so that the service life of the air conditioner is shortened. Therefore, it is crucial to configure the battery energy storage system with a suitable air conditioner.
Before configuring a proper air conditioner for the battery energy storage system, the variation trend of the battery temperature in the battery energy storage system can be obtained through the simulation model of the battery energy storage system. And then configuring a proper air conditioner for the battery energy storage system according to the variation trend of the battery temperature in the battery energy storage system.
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 needs to carry out model pretreatment, grid division, solving calculation, post-treatment and other operations on a box body space where the battery energy storage system is located.
Accordingly, when the three-dimensional simulation model is used for simulating the battery energy storage system, a large amount of computing resources are required to be occupied, and the time consumption is long.
Considering that the reason that the battery energy storage system is long in modeling time in the prior art is that three-dimensional modeling needs to be performed on all objects in a box where the battery energy storage system is located, the invention provides a modeling method for constructing a one-dimensional simulation model of the battery energy storage system by using the influence relationship of the temperature among all parts in the battery energy storage system. Compared with a three-dimensional modeling method in the prior art, the time for modeling the battery energy storage system can be reduced. Accordingly, the time and computational resources for performing simulation operations using a one-dimensional simulation model may be reduced compared to performing simulation operations using a three-dimensional simulation model. In a specific implementation, the method may be performed by an electronic device, which may be a server, a terminal, or other device with a processing function.
The following describes the technical solution of the present invention in detail by using specific embodiments in conjunction with the working environment of the battery energy storage system shown in fig. 1. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be understood that, in the above operating environment, the device for adjusting the temperature of the operating environment of the battery energy storage system may be referred to as a temperature adjustment device. Including but not limited to air conditioners, fans, etc. having a temperature regulating function.
Fig. 2 is a schematic flow chart of a modeling method of a battery energy storage system according to the present invention. As shown in fig. 2, the method comprises the steps of:
s101, based on a battery energy storage system, a temperature adjusting device output quantity evaluation module, a box internal and external environment heat exchange quantity evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat production evaluation module are created.
The factors that allow 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 when the battery energy storage system actually works include: the output quantity of the temperature adjusting device, the heat exchange quantity of the environment inside and outside the box body, the temperature of the environment inside the box body, the heat generated by the battery and the like. Therefore, the electronic equipment can realize that the modeling process of the battery energy storage system is closer to the actual operation working condition of the battery energy storage system by creating the output quantity evaluation module of the temperature adjusting device, the internal and external environment heat exchange quantity evaluation module of the box, the internal and external environment temperature evaluation module of the box, the battery temperature evaluation module and the battery heat generation evaluation module, so that the accuracy of the simulation model expression is improved.
The output quantity evaluation module of the temperature adjusting device is used for measuring and calculating the output quantity of the temperature adjusting device in the box body of the battery energy storage system under the preset working condition. Wherein, when the temperature adjusting device plays a role of refrigeration, the output quantity can be the refrigeration quantity; when the temperature adjustment device functions to generate heat, the output may be the amount of heat generated. The internal and external environment heat exchange amount evaluation module is used for measuring and calculating the internal and external environment heat exchange amount of the battery energy storage system under the preset working condition. The internal environment temperature evaluation module of the box body is used for measuring and calculating the internal environment temperature of the box body of the battery energy storage system under the preset working condition. The battery temperature evaluation module is used for measuring and calculating the battery temperature of the battery energy storage system under a preset working condition (the battery temperature in the embodiment may be the battery core temperature, the concepts of the battery temperature and the battery core temperature are the same, and the battery temperature is not distinguished). The battery heat production evaluation module is used for measuring and calculating the heat production of the battery energy storage system under the preset working condition.
It should be understood that the above-described electronic device is based on the various modules created by the battery energy storage system, merely for ease of illustration and description of the modeling method. The present invention does not limit the division of each module and the naming of each module.
S102, establishing a first coupling relation between the battery temperature evaluation module and the battery heat generation evaluation module and between the battery temperature evaluation module and the box internal environment temperature evaluation module according to the influence relation between the heat generated by the battery and the box internal environment temperature on the battery temperature.
Illustratively, the higher the ambient temperature inside the case, the higher the battery temperature; the higher the battery energy storage system itself generates heat, the higher the battery temperature, wherein, taking the structure of the battery energy storage system shown in fig. 1 as an example, the battery energy storage system itself generates heat mainly from the heat generated by the battery. Accordingly, battery temperature may also have an effect on battery heat generation (e.g., the higher the battery temperature, the lower the battery's heat generating power may be, which in turn results in the lower the battery's heat generation).
The electronic equipment can establish a first coupling relation between the battery temperature evaluation module and the battery heat generation evaluation module and between the battery temperature evaluation module and the box internal environment temperature evaluation module according to the influence relation of the parameters on the battery temperature. The first coupling relation represents the interaction of the parameters related to the temperature among the three modules when the preset working condition of the battery energy storage system is simulated.
S103, according to the influence relationship among the heat exchange quantity of the internal environment and the external environment of the box body, the output quantity of the temperature adjusting device, the battery temperature and the internal environment temperature of the box body, a second coupling relationship between the internal environment temperature evaluation module of the box body and the output quantity evaluation module of the temperature adjusting device, the internal environment heat exchange quantity evaluation module of the external environment of the box body and the battery temperature evaluation module is established.
Illustratively, the greater the amount of heat exchange between the internal environment and the external environment of the tank, the greater the influence of the external ambient temperature of the tank on the internal ambient temperature of the tank. Under the condition that the volume of a box body where the battery energy storage system is located is certain, the output quantity of the temperature adjusting device in the box body is larger, and the change of the internal environment temperature of the box body is quicker. The higher the battery temperature, the higher the ambient temperature inside the case. Accordingly, the temperature of the environment inside the cabinet also has an influence on the output of the temperature adjusting device and the heat exchange amount of the environment inside and outside the cabinet.
The electronic equipment can establish a second coupling relation between the box internal environment temperature evaluation module and the output quantity evaluation module of the temperature adjusting device, the internal and external environment heat exchange quantity evaluation module of the box and the battery temperature evaluation module according to the influence relation of the parameters on the internal environment temperature of the box. The second coupling relation represents the interaction of the parameters related to the temperature among the four modules under the preset working condition of the simulated battery energy storage system.
And S104, generating a simulation model of the battery energy storage system according to the modules, the input parameters and the output parameters of the modules, the first coupling relation and the second coupling relation.
In this embodiment, the first coupling relationship and the second coupling relationship are utilized to establish a relationship between the modules and the influence of the modules on the temperature, so that the modules having the coupling relationship can accurately measure and calculate the temperature-related variables under the preset operation condition.
After the simulation model is generated in the above manner, when the battery energy storage system is simulated, the output quantity evaluation module of the temperature adjusting device is used for measuring and calculating the output quantity of the temperature adjusting device in the box body of the battery energy storage system under the preset working condition. Wherein, when the temperature adjusting device plays a role of refrigeration, the output quantity can be the refrigeration quantity; when the temperature adjustment device functions to generate heat, the output may be the amount of heat generated. The internal and external environment heat exchange quantity evaluation module of the box body is used for measuring and calculating the internal and external environment heat exchange quantity of the battery energy storage system under the preset working condition. The internal environment temperature evaluation module of the box body is used for measuring and calculating the internal environment temperature of the box body of the battery energy storage system under the preset working condition. The battery temperature evaluation module is used for measuring and calculating the battery temperature of the battery energy storage system under a preset working condition (the battery temperature in the embodiment may be the battery core temperature, the concepts of the battery temperature and the battery core temperature are the same, and the battery temperature is not distinguished). The battery heat production evaluation module is used for measuring and calculating the heat production of the battery energy storage system under the preset working condition.
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 mode of influencing the output parameter change. Fig. 3 is a schematic diagram of a simulation model of a battery energy storage system according to an exemplary embodiment of the present invention. In the simulation model shown in fig. 3, the input parameter of the output quantity evaluation module of the temperature adjustment device is the internal environment temperature of the box, and the output parameter is the output quantity of the temperature adjustment device. The input parameter of the evaluation module for the heat exchange quantity of the inner environment and the outer environment of the box body is the temperature of the inner environment of the box body, and the output parameter is the heat exchange quantity of the inner environment and the outer environment of the box body. The input parameters of the box internal environment temperature evaluation module comprise: the battery temperature, the output quantity of the temperature adjusting device, the heat exchange quantity of the internal environment and the external environment of the box body, and the output parameter is the internal environment temperature of the box body. The input parameter of the battery heat production evaluation module is battery temperature, and the output parameter is the heat produced by the battery. The input parameters of the battery temperature evaluation module include: the inside ambient temperature of box, the produced heat of battery, output parameter includes: the temperature of the battery.
Through the simulation model generated by the embodiment, the variation trend of the battery energy storage system related to the temperature under the preset working condition can be obtained. Wherein the temperature-dependent trend of change may comprise, for example, at least one of: the temperature variation trend of the battery, the temperature variation trend of the environment inside the box body, the output power variation trend of the temperature adjusting device, the variation trend of the heat exchange quantity of the environment inside and outside the box body and the variation trend of the heat generated by the battery. The temperature-dependent trend may be a trend with time. In addition, the output power variation trend of the temperature adjusting device can also be used for expressing the start-stop frequency of the temperature adjusting device.
In the implementation, the electronic device creates modules related to temperature change according to the actual condition of the temperature interaction of the working environment of the battery energy storage system, and then establishes the coupling relation among the modules according to the influence relation among the modules, thereby realizing the modeling of the battery energy storage system. The modeling method avoids three-dimensional modeling of all objects in the box body where the battery energy storage system is located, and only interaction among factors related to temperature change of the battery energy storage system needs to be considered to perform one-dimensional modeling on the battery energy storage system, so that the modeling method provided by the invention does not need to calculate a large amount of data, and further achieves the technical effects of saving calculation resources and reducing modeling time.
In addition, in the face of different battery energy storage systems, a user can add or reduce modules related to temperature change on the basis of the simulation model according to the actual composition and working environment of the battery energy storage systems, namely the modeling method has better expandability in the face of different battery energy storage systems. For example, if the simulation model of the battery energy storage system constructed by the one-dimensional modeling method is applied to a heat exchange system of a new energy power battery energy storage system, a cooling liquid heat exchange evaluation module influencing temperature change can be added on the basis of the simulation model.
Taking the working environment of the battery energy storage system shown in fig. 1 as an example, referring to the simulation model of the battery energy storage system shown in fig. 3, how each module in the simulation model of the battery energy storage system measures and calculates its output is described as follows:
1. battery heat production evaluation module
Alternatively, the battery heat generation evaluation module may obtain the heat generated by the battery by the following equation (0).
Q＝I2×R×Δt (0)
Wherein I represents a charge or discharge current of the battery. Alternatively, the charging or discharging current of the battery may be obtained by the operating conditions of the battery energy storage system. Accordingly, the input parameters of the battery heat generation evaluation module may also include the operating conditions of the battery energy storage system.
R represents the internal resistance of the battery integrated within the battery heat production evaluation module, and may be integrated within the battery heat production evaluation module in the form of an internal resistance matrix, for example. And delta t represents the duration of one data acquisition period of the battery energy storage system simulation model. For example, the Δ t may be 1 second, 2 seconds, or the like. The data acquisition cycle as referred to herein refers to the time interval between two adjacent outputs of each module.
For example, the battery heat generation evaluation module may obtain the value of R by linear interpolation according to a State of charge (SOC) of the battery and a temperature of the battery. The battery heat generation evaluation module can obtain the SOC of the battery through the working condition integration of the current I. When the SOC is 100%, it indicates that the battery is in a full state of charge. Taking the rated capacity of the battery as 20A/h (ampere/hour) as an example, if the battery operates for half an hour at a discharge current of 20A, the SOC takes a value of 50% in this example.
Optionally, the battery heat generation evaluation module may further store a correspondence table of the battery SOC, the battery temperature, and the battery internal resistance value in the battery heat generation evaluation module, and then obtain the internal resistance value corresponding to the battery internal resistance R according to the correspondence table.
It should be understood that the battery heat generation evaluation module is used for measuring and calculating the heat generation of the battery under the preset working condition of the battery energy storage system, and the method is only one possible method for realizing the function of the battery heat generation evaluation module provided by the invention, and the implementation manner of the battery heat generation evaluation module is not limited by the invention. In particular implementations, the battery heat production evaluation module may also use other ways to implement its own functionality. For example, instead of the battery heat production evaluation module of the present invention, a davinan cell battery model can be used to simulate battery heat production.
2. Battery temperature evaluation module
Alternatively, the battery temperature evaluation module may obtain the battery temperature by the following formula (1).
Wherein, Tcell_iBattery temperature, Q, representing the ith data acquisition cycle of a simulation model of a battery energy storage system_i-1Representing the heat generated by the battery output by the battery heat generation evaluation module in the (i-1) th data acquisition cycle; t is a unit ofcell_i-1The battery temperature obtained by the battery temperature evaluation module in the (i-1) th data acquisition cycle is represented; t isair_i-1And the internal environment temperature of the box body output by the internal environment temperature evaluation module of the box body in the (i-1) th data acquisition period. h represents the heat dissipation coefficient of the battery, and C represents the heat capacity of the battery.
h is determined by the arrangement mode and the heat dissipation mode of the cells, and C can be determined by the properties of the cells. Illustratively, h and C may be stored in the battery temperature evaluation module. Or h and/or C can be determined by a user through calibration according to previous experimental data and can be used as input parameters of the battery temperature evaluation module to further improve the accuracy of the simulation model, so that the accuracy of a simulation result obtained when the simulation model is subsequently used for simulation can be improved.
3. Box internal environment temperature evaluation module
Optionally, the inside-box ambient temperature evaluation module may obtain the inside-box ambient temperature through formula (2).
Wherein, Tair_iThe ambient temperature inside the cabinet representing the ith data acquisition cycle,
the output quantity of the temperature adjusting device output quantity evaluation module in the i-1 th data acquisition period is represented,
representing the heat exchange quantity of the internal and external environments in the box body output by the heat exchange quantity evaluation module of the internal and external environments in the i-1 th data acquisition period, CairIndicating the air heat capacity inside the cabinet.
That is, the input parameters of the tank interior ambient temperature evaluation module may also include the air heat capacity inside the tank. Alternatively, the specific heat capacity of the air may also be stored in advance in the case internal ambient temperature evaluation module.
Optionally, the inside-box ambient temperature evaluation module may obtain the inside-box ambient temperature through formula (3).
Where ρ represents the air density inside the case, V represents the air volume inside the case, and CpIndicating the specific heat capacity of the air inside the cabinet.
That is, the input parameters of the tank interior ambient temperature evaluation module may further include the density of air, the volume of air inside the tank, and the specific heat capacity of air.
4. Evaluation module for heat exchange quantity of inner and outer environments of box body
Optionally, the inside and outside environment heat exchange amount evaluation module of the box body may obtain the inside and outside environment heat exchange amount of the box body through a formula (4).
Qout＝K×S×(Tout_i-1-Tair_i-1)×Δt (4)
Wherein K represents the heat exchange coefficient inside and outside the box body, S represents the heat exchange area (the contact area between the box body and the outside air) of the box body, and Tout_i-1The ambient temperature outside the tank for the i-1 th cycle is shown.
Namely, the input parameters of the internal and external environment heat exchange amount evaluation module in the box body can further comprise at least one of the following parameters: the external environment temperature of the box body, the internal and external heat exchange coefficients of the box body and the heat exchange area of the box body. For example, the internal and external heat exchange coefficients of the box body and the heat exchange area of the box body are stored in the internal and external environment heat exchange amount evaluation module in advance. At this time, the input parameter of the internal and external environment heat exchange amount evaluation module may be the external environment temperature of the box.
It should be understood that the function of the inside and outside environment heat exchange amount evaluation module in the box body is to measure and calculate the inside and outside environment heat exchange amount of the box body under the preset working condition of the battery energy storage system, the method is only one possible method for realizing the function of the inside and outside environment heat exchange amount evaluation module in the box body, and the realization mode of the inside and outside environment heat exchange amount evaluation module in the box body is not limited by the invention.
During specific implementation, the heat exchange amount evaluation module of the environment inside and outside the box body can also use other modes to realize the functions of the box body. For example, the heat exchange quantity evaluation module can be expanded on the basis of the heat exchange quantity evaluation module in the internal environment and the external environment of the box, and the influence of radiation, convection, heat conduction and other factors on the internal environment temperature of the box is further considered, so that the modeling process of the battery energy storage system is closer to the actual operation working condition of the battery energy storage system, and the accuracy of simulation model expression is further improved.
5. Output quantity evaluation module of temperature adjusting device
Optionally, taking the temperature adjustment device as a fixed-frequency (the output power of the temperature adjustment device remains unchanged during the operation period, i.e. the output quantity of the temperature adjustment device is rated) operation mode as an example, fig. 4 is a schematic flow chart of the output quantity estimation module of the temperature adjustment device for measuring and calculating the output quantity of the temperature adjustment device. Wherein the target temperature refers to a target temperature of an ambient temperature inside the case. For example, the target temperature may be used as an input parameter of the output quantity evaluation module of the temperature adjustment device, or the output quantity evaluation module of the temperature adjustment device may further calculate the target temperature according to the battery temperature, so that the internal environment temperature of the box can better meet the requirement of the battery working environment under the actual condition.
And delta T represents the absolute value of the difference value between the target temperature and the internal environment temperature of the box body, and the first temperature difference threshold value and the second temperature difference threshold value are both threshold values corresponding to the difference value between the target temperature and the internal environment temperature of the box body. The first temperature difference threshold is used for judging whether the temperature adjusting device starts to work or not, and the second temperature difference threshold is used for judging whether the temperature adjusting device stops working or not.
As shown in fig. 4, if the Δ T is greater than the first temperature difference threshold, it indicates 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, which indicates that the internal ambient temperature of the box is too low, the temperature adjustment device is controlled to start heating. And when the output quantity evaluation module of the temperature adjusting device determines that the delta T is smaller than the second temperature difference threshold value, the internal environment temperature of the box body is indicated to meet the requirement of the battery energy storage system on the working environment temperature, and the temperature adjusting device is controlled to stop working. And if the output quantity evaluation module of the temperature adjusting device determines that the delta T is larger than the second temperature difference threshold value, which indicates that the internal environment temperature of the box body does not reach the requirement of the battery energy storage system on the working environment temperature, controlling the temperature adjusting device to continue working. If the delta T is smaller than the second temperature difference threshold value, the internal environment temperature of the box body meets the requirement of the battery energy storage system on the working environment temperature, and the temperature adjusting device is controlled to keep in a standby state.
As shown in fig. 4, when the temperature adjustment device is in the fixed-frequency operation mode, in the ith data acquisition period of the simulation model, if the temperature adjustment device is in the operation state, the output quantity of the temperature adjustment device in the ith data acquisition period is the rated output quantity of the temperature adjustment device. And if the temperature adjusting device is in a standby state, the output quantity of the temperature adjusting device in the ith data acquisition period is 0. In addition, the output quantity evaluation module of the temperature adjusting device can also record the time when the temperature adjusting device starts to work and stops working, and is used for describing the starting and stopping frequency of the temperature adjusting device.
It should be understood that the output quantity evaluation module of the temperature adjustment device can also evaluate the output quantity of the temperature adjustment device in other manners, and the internal control logic of the output quantity evaluation module of the temperature adjustment device is not limited in the present invention.
Taking the temperature adjustment device as a frequency conversion working mode as an example, the output quantity evaluation module of the temperature adjustment device can calculate and calculate the output quantity of the temperature adjustment device in the following manner. Wherein, frequency conversion mode refers to: the output power of the temperature adjusting device changes with the difference between the target temperature and the ambient temperature inside the box body. For example, the closer Δ T is to the first temperature difference threshold, the smaller the output power of the temperature adjustment device; the larger the difference between Δ T and the first temperature difference threshold, the larger the output power of the temperature adjustment device. In the ith data acquisition period of the simulation model, the output quantity of the temperature adjusting device obtained by the output quantity evaluation module of the temperature adjusting device corresponds to the output power of the temperature adjusting device at the time, and can be specifically determined according to the output power.
Thus, the input parameters of the thermostat output quantity evaluation module may further include at least one of: the device comprises a target temperature, output power, a first temperature difference threshold value for judging whether the temperature adjusting device starts to work or not, and a second temperature difference threshold value for judging whether the temperature adjusting device stops working or not. Alternatively, these parameters are preset in the thermostat output evaluation module.
Referring to fig. 3, taking the heat dissipation coefficient of the battery, the heat capacity of the battery, the operating condition, the air heat capacity 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 value, and the second temperature difference threshold value as examples, based on the specific implementation of the modules, and the first coupling relationship and the second coupling relationship, the simulation model of the battery energy storage system obtained by the electronic device may be as shown in fig. 5. Fig. 5 is a schematic diagram of a simulation model of another battery energy storage system provided by the present invention.
It should be understood that, when the battery energy storage system is simulated by using the simulation model, the simulation model can obtain the temperature-dependent variation trend through multiple rounds of measurement and calculation. Wherein each round represents one of said data acquisition cycles. Namely, one module output is one data acquisition period.
For example, the input parameters required by each model may be input into the simulation model when the simulation model is started for simulation, or partial parameters of partial models may be preset into the module when the simulation model is built. For example, the input parameters of the heat exchange amount evaluation module for the internal and external environments of the box body are as follows: the heat exchange coefficient inside and outside the box body, the heat exchange area of the box body and the like.
After the simulation model is obtained by adopting any one of the above manners, the electronic device can use the simulation model to obtain simulation results of the battery energy storage system under different operation conditions. Fig. 6 is a schematic flow chart of a simulation method of a battery energy storage system according to the present invention. As shown in fig. 6, the method comprises the steps of:
s201, receiving the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located, and the external environment temperature parameter value of the box body.
For example, the electronic device may receive the parameter value through an Application Program Interface (API) or a Graphical User Interface (GUI).
S202, obtaining the temperature-related change trend of the battery energy storage system by utilizing the simulation model of any battery energy storage system according to the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body.
After the electronic equipment obtains the parameter values, the electronic equipment can input the operating condition of the battery energy storage system, the configuration of the temperature adjusting device arranged in the box where the battery energy storage system is located, and the external environment temperature parameter values of the box into the simulation model, so that the simulation model simulates the battery energy storage system based on the information. In addition, the electronic device can also acquire values of other input parameters of each module in the simulation model and input the values into the simulation model, so that the simulation model can simulate the battery energy storage system based on the information, and the values can be determined according to parameter values required to be input when the simulation model is used for simulation operation.
And then the electronic equipment obtains the variation trend related to the temperature through any one of the simulation models of the battery energy storage system. The temperature-related trend may include any one or more of the steps S104.
And S203, outputting the temperature-related change trend of the battery energy storage system.
Taking the temperature variation trend as the battery temperature variation trend as an example, the electronic device can obtain the variation trend of the battery temperature along with the time of the battery energy storage system under a specific working condition through the simulation model, and output the variation trend of the battery temperature along with the time. For example, a user can observe whether the battery temperature is always within a preset temperature range through the change trend of the battery temperature along with time. If the temperature of the battery continuously rises until the temperature exceeds the preset temperature range and the temperature does not tend to fall, the output quantity of the temperature adjusting device configured for the battery energy storage system is too small to meet the temperature regulation of the battery energy storage system. The user can configure a proper temperature adjusting device for the battery energy storage system according to the simulation result, and the simulation result can provide guidance and optimization for the use working condition 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 simulation result can also provide help for development work of a thermal management scheme of the battery energy storage system, service life prediction of the battery energy storage system and value evaluation.
In this embodiment, when the electronic device simulates the battery energy storage system by using the simulation model, compared with a case that the battery energy storage system is simulated by using a three-dimensional simulation model, the one-dimensional simulation process does not need to calculate a large amount of data, and a technical effect of reducing simulation time is achieved.
Fig. 7 is a schematic structural diagram of a modeling apparatus of a battery energy storage system according to the present invention. As shown in fig. 7, the apparatus includes:
the creating module 31 is configured to create, based on the battery energy storage system, an output quantity evaluation module of the temperature adjustment device, an internal and external environment heat exchange quantity evaluation module of the box, an internal environment temperature evaluation module of the box, a battery temperature evaluation module, and a battery heat generation evaluation module, where the output quantity is a cooling quantity or a heating quantity.
A first establishing module 32, configured to establish a first coupling relationship among the battery temperature estimating module, the battery heat generation estimating module, and the box internal environment temperature estimating module according to an influence relationship among the heat generated by the battery, the box internal environment temperature, and the battery temperature.
A second establishing module 33, configured to establish a second coupling relationship between the box internal environment temperature evaluating module and the output quantity evaluating module of the temperature adjusting device, the box internal and external environment heat exchange quantity evaluating module, and the battery temperature evaluating module according to an influence relationship among the heat exchange quantity of the internal and external environments of the box, the output quantity of the temperature adjusting device, the battery temperature, and the box internal environment temperature.
The generating module 34 is configured to generate a simulation model of the battery energy storage system according to the input parameters and the output parameters of each module, the first coupling relationship, and the second coupling relationship; the simulation model is used for evaluating the temperature-related variation trend of the battery energy storage system under a preset working condition.
Optionally, the temperature-related trend of change includes at least one of: the temperature control device comprises a battery temperature variation trend, a box body internal environment temperature variation trend, a temperature adjusting device output power variation trend, a box body internal and external environment heat exchange quantity variation trend and a battery generated heat variation trend.
Optionally, the first establishing module 32 is specifically configured to obtain the first coupling relationship by taking the heat generated by the battery and output by the battery heat generation evaluating module, and the internal environment temperature of the box and output by the box internal environment temperature evaluating module as input parameters of the battery temperature evaluating module, and taking the battery temperature output by the battery temperature evaluating module as input parameters of the battery heat generation evaluating module, according to an influence relationship among the heat generated by the battery, the internal environment temperature of the box, and the battery temperature.
Optionally, the input parameter of the battery temperature evaluation module further includes a heat capacity of the battery and/or a heat dissipation coefficient of the battery.
Optionally, the input parameters of the battery heat production evaluation module further include: and the operation condition of the battery energy storage system.
Optionally, the second establishing module 33 is specifically configured to, according to an influence relationship among the heat exchange amount of the internal and external environments of the box, the output amount of the temperature adjusting device, the battery temperature, and the internal environment temperature of the box, use the battery temperature output by the battery temperature evaluating module, the output amount of the temperature adjusting device output amount evaluating module, and the internal and external environment heat exchange amount output by the internal and external environment heat exchange amount evaluating module as input parameters of the internal environment temperature evaluating module of the box, and use the internal environment temperature output by the internal environment temperature evaluating module as input parameters of the temperature adjusting device output amount evaluating module and the internal and external environment heat exchange amount evaluating module of the box, to obtain the second coupling relationship.
Optionally, the input parameters of the module for estimating the ambient temperature inside the box further include the heat capacity of air inside the box.
Optionally, the input parameters of the output quantity evaluation module of the temperature adjustment device further include at least one of the following: the temperature control device comprises a target temperature, output power, a first temperature difference threshold value for judging whether the temperature adjusting device starts to work or not and a second temperature difference threshold value for judging whether the temperature adjusting device stops working or not; the first temperature difference threshold value is larger than the second temperature difference threshold value, and the first temperature difference threshold value and the second temperature difference threshold value are both the target temperature and the threshold value corresponding to the difference value of the internal environment temperature of the box body.
Optionally, the output quantity evaluation module of the temperature adjustment device evaluates the output quantity of the temperature adjustment device based on the fixed-frequency working mode of the temperature adjustment device.
Optionally, the input parameters of the inside and outside environment heat exchange amount evaluation module of the box body further include at least one of the following: the heat exchange device comprises a box body, an external environment temperature of the box body, internal and external heat exchange coefficients of the box body and a heat exchange area of the box body.
The modeling device of the battery energy storage system provided by the invention is used for executing the embodiment of the modeling method, the realization principle and the technical effect are similar, and the description is omitted.
Fig. 8 is a schematic structural diagram of a simulation apparatus of a battery energy storage system according to the present invention. As shown in fig. 8, the apparatus includes:
the receiving module 41 is configured to receive an operation condition of the battery energy storage system, a configuration of a temperature adjustment device disposed in a box where the battery energy storage system is located, and an external environment temperature parameter value of the box.
The obtaining module 42 is configured to obtain a temperature-related variation trend of the battery energy storage system according to an operating condition of the battery energy storage system, a configuration of a temperature adjustment device arranged in a box where the battery energy storage system is located, and an external environment temperature parameter value of the box by using a simulation model of any one of the battery energy storage systems.
And the output module 43 is used for outputting the temperature-related variation trend of the battery energy storage system.
The simulation device of the battery energy storage system provided by the invention is used for executing the embodiment of the simulation method, the realization principle and the technical effect are similar, and the details are not repeated.
Fig. 9 is a schematic structural diagram of an electronic device according to the present invention. As shown in fig. 9, the electronic device 50 may include: at least one processor 51 and a memory 52.
And a memory 52 for storing programs. In particular, the program may include program code including computer operating instructions.
The memory 52 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 51 is configured to execute computer-executable instructions stored by the memory 52 to implement a method of modeling or simulating a battery energy storage system. The processor 51 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present invention.
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 connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. Buses may be classified as address buses, data buses, control buses, etc., but do not represent only one bus or type of bus.
Alternatively, in a specific implementation, if the communication interface 53, the memory 52 and the processor 51 are integrated into a chip, the communication interface 53, the memory 52 and the processor 51 may complete communication through an internal interface.
The present invention also provides a computer-readable storage medium, which may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and in particular, the computer-readable storage medium stores program instructions, and the program instructions are used in the method in the foregoing embodiments.
The present application also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the electronic device may read the execution instructions from the readable storage medium, and the execution of the execution instructions by the at least one processor causes the electronic device to implement the method for modeling or simulating a battery energy storage system provided by the various embodiments described above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. A modeling method of a battery energy storage system is characterized in that the battery energy storage system is arranged in a box body, the box body is provided with a temperature adjusting device for adjusting the internal environment temperature of the box body, and the modeling method comprises the following steps:
based on the battery energy storage system, an output quantity evaluation module of the temperature adjusting device, an internal and external environment heat exchange quantity evaluation module of the box body, an internal environment temperature evaluation module of the box body, a battery temperature evaluation module and a battery heat production evaluation module are created, wherein the output quantity is refrigerating quantity or heating quantity;
establishing a first coupling relation among the battery temperature evaluation module, the battery heat generation evaluation module and the box internal environment temperature evaluation module according to the influence relation of the heat generated by the battery and the box internal environment temperature on the battery temperature;
establishing a second coupling relation between the internal environment temperature evaluation module of the box body and the output quantity evaluation module of the temperature adjusting device, the internal and external environment heat exchange quantity evaluation module of the box body and the battery temperature evaluation module according to the influence relation of the heat exchange quantity of the internal and external environments of the box body, the output quantity of the temperature adjusting device and the battery temperature on the internal environment temperature of the box body;
and generating a simulation model of the battery energy storage system according to the modules, the input parameters and the output parameters of the modules, the first coupling relation and the second coupling relation, wherein the simulation model is used for evaluating the temperature-related variation trend of the battery energy storage system under a preset working condition.
2. The method of claim 1, wherein the temperature-dependent trend of change comprises at least one of:
the temperature control device comprises a battery temperature variation trend, a box body internal environment temperature variation trend, a temperature adjusting device output power variation trend, a box body internal and external environment heat exchange quantity variation trend and a battery generated heat variation trend.
3. The method according to claim 1 or 2, wherein establishing a first coupling relationship between the battery temperature evaluation module and the battery heat generation evaluation module and the box internal environment temperature evaluation module according to an influence relationship between the heat generated by the battery, the box internal environment temperature and the battery temperature comprises:
according to the influence relationship among the heat generated by the battery, the internal environment temperature of the box and the battery temperature, the first coupling relationship is obtained by taking the heat generated by the battery and output by the battery heat generation evaluation module, the internal environment temperature of the box and output by the internal environment temperature evaluation module as input parameters of the battery temperature evaluation module, and the battery temperature output by the battery temperature evaluation module as input parameters of the battery heat generation evaluation module.
4. The method of claim 3, wherein the input parameters of the battery temperature evaluation module further comprise a heat capacity of the battery and/or a heat dissipation coefficient of the battery.
5. The method of claim 3, wherein the input parameters of the battery heat production evaluation module further comprise: and the operation condition of the battery energy storage system.
6. The method according to any one of claims 1 or 2, wherein the establishing a second coupling relationship between the box internal environment temperature evaluation module and the temperature adjustment device output quantity evaluation module, the box internal and external environment heat exchange quantity evaluation module, and the battery temperature evaluation module according to the influence relationship among the heat exchange quantity of the box internal and external environments, the temperature adjustment device output quantity, the battery temperature, and the box internal environment temperature comprises:
according to the influence relation among the heat exchange quantity of the inner environment and the outer environment of the box body, the output quantity of the temperature adjusting device, the battery temperature and the internal environment temperature of the box body, the battery temperature output by the battery temperature evaluation module, the output quantity of the temperature adjusting device output quantity output by the temperature adjusting device output quantity evaluation module and the internal and external environment heat exchange quantity output by the internal and external environment heat exchange quantity evaluation module of the box body are used as input parameters of the internal environment temperature evaluation module of the box body, and the internal environment temperature output by the internal environment temperature evaluation module of the box body is used as the input parameters of the temperature adjusting device output quantity evaluation module and the internal and external environment heat exchange quantity evaluation module of the box body, so that the second coupling relation is obtained.
7. The method of claim 6, wherein the input parameters of the tank interior ambient temperature evaluation module further comprise an air heat capacity of the tank interior; alternatively, the first and second electrodes may be,
density of air, volume of air inside the box, and specific heat capacity of air.
8. The method of claim 6, wherein the input parameters of the thermostat output assessment module further comprise at least one of:
the temperature control device comprises a target temperature, output power, a first temperature difference threshold value for judging whether the temperature adjusting device starts to work or not and a second temperature difference threshold value for judging whether the temperature adjusting device stops working or not; the first temperature difference threshold value is larger than the second temperature difference threshold value, and the first temperature difference threshold value and the second temperature difference threshold value are both the target temperature and the threshold value corresponding to the difference value of the internal environment temperature of the box body.
9. The method of claim 6, wherein the thermostat output estimation module estimates the thermostat output based on a thermostat fixed frequency mode of operation.
10. The method of claim 6, wherein the input parameters of the evaluation module for the amount of heat exchange in the environment inside and outside the box further comprise at least one of: the heat exchange device comprises a box body, an external environment temperature of the box body, internal and external heat exchange coefficients of the box body and a heat exchange area of the box body.
11. A simulation method of a battery energy storage system is characterized by comprising the following steps:
receiving the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located, and the external environment temperature parameter value of the box body;
acquiring a temperature-related change trend of the battery energy storage system by using the simulation model of the battery energy storage system according to the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body as claimed in any one of claims 1 to 9;
and outputting the temperature-related variation trend of the battery energy storage system.
12. The utility model provides a modeling device of battery energy storage system, its characterized in that, battery energy storage system sets up in the box, the box is provided with the temperature adjustment device who adjusts the inside ambient temperature of box, includes:
the battery energy storage system comprises a creation module, a temperature adjustment device output quantity evaluation module, a box internal and external environment heat exchange quantity evaluation module, a box internal environment temperature evaluation module, a battery temperature evaluation module and a battery heat production evaluation module, wherein the output quantity is refrigerating quantity or heating quantity;
the first establishing module is used for establishing a first coupling relation among the battery temperature evaluation module, the battery heat generation evaluation module and the box internal environment temperature evaluation module according to the influence relation of the heat generated by the battery and the box internal environment temperature on the battery temperature;
the second establishing module is used for establishing a second coupling relation between the internal box environment temperature evaluation module and the output quantity evaluation module of the temperature adjusting device, the internal and external box environment heat exchange quantity evaluation module and the battery temperature evaluation module according to the influence relation of the heat exchange quantity of the internal and external box environments, the output quantity of the temperature adjusting device and the battery temperature on the internal box environment temperature;
the generating module is used for generating a simulation model of the battery energy storage system according to the input parameters and the output parameters of the modules, the first coupling relation and the second coupling relation; the simulation model is used for evaluating the temperature-related variation trend of the battery energy storage system under a preset working condition.
13. An apparatus for simulating a battery energy storage system, the apparatus comprising:
the receiving module is used for receiving the operation condition of the battery energy storage system, the configuration of a temperature adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body;
the battery energy storage system simulation system comprises an acquisition module, a calculation module and a control module, wherein the acquisition module is used for acquiring the 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 adjusting device arranged in a box body where the battery energy storage system is located and the external environment temperature parameter value of the box body by using the battery energy storage system simulation model according to any one of claims 1-9;
and the output module is used for outputting the temperature-related variation trend of the battery energy storage system.
14. An electronic device, comprising: at least one processor, a memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the electronic device to perform the method of any of claims 1-11.
15. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1-11.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116150922A (en) * | 2022-12-29 | 2023-05-23 | 哲弗智能系统（上海）有限公司 | Design method of energy storage pipeline system |
| CN117458011A (en) * | 2023-12-22 | 2024-01-26 | 江苏天合储能有限公司 | Performance evaluation model and performance evaluation method of energy storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116150922A (en) * | 2022-12-29 | 2023-05-23 | 哲弗智能系统（上海）有限公司 | Design method of energy storage pipeline system |
| CN116150922B (en) * | 2022-12-29 | 2023-11-28 | 哲弗智能系统（上海）有限公司 | Design method of energy storage pipeline system |
| CN117458011A (en) * | 2023-12-22 | 2024-01-26 | 江苏天合储能有限公司 | Performance evaluation model and performance evaluation method of energy storage system |
| CN117458011B (en) * | 2023-12-22 | 2024-04-23 | 江苏天合储能有限公司 | Performance evaluation model and performance evaluation method of energy storage system |
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