Temperature control method, device, equipment and storage medium of energy storage system

Abstract

The present invention discloses a temperature control method, device, equipment and storage medium for an energy storage system. The present invention obtains the operating parameters of the energy storage system, wherein the operating parameters include: the current battery temperature, the current ambient temperature, the current charge and discharge power and the battery temperature rise characteristics; predicts the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature; when the predicted battery temperature is greater than the first preset safety temperature threshold, adjusts the current ambient temperature so that the energy storage system operates at the target ambient temperature obtained after adjustment. The present invention adjusts the ambient temperature by predicting the battery operating temperature at the next moment, thereby keeping the battery operating temperature within the safe temperature range, solving the technical problem of poor battery charging and discharging performance due to excessively high battery temperature.

Description

Technical Field

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

[0002] As the world's population continues to increase and industrial production becomes more and more common, the demand for energy and electricity in all walks of life is becoming stronger and stronger. Under the current situation, the global energy structure is generally concentrated on fossil fuels. As we all know, the formation cycle of fossil fuels such as oil, natural gas, and coal is as long as tens of millions of years. According to incomplete statistics, according to the current form of fossil fuel mining and use, they will be exhausted in a hundred years. In response to this, governments of various countries are issuing relevant policies to effectively utilize renewable resources such as solar energy, wind energy, and hydropower for power generation, but this type of power generation has certain limitations and is greatly affected by geographical factors. The energy storage system can not only respond efficiently, quickly and accurately, but also its implementation form is not restricted by geographical location. To a certain extent, it can serve the role of the power grid, charging the energy storage battery during the low electricity consumption period, and discharging the energy storage battery during the peak electricity consumption period to compensate for the power grid and reduce the power grid load.

[0003] Energy storage systems are generally placed in the form of containers. The battery packs in the containers are connected in series or in parallel at a high density, which causes the battery temperature to be too high, affecting the battery's charging and discharging performance. It also brings the risk of thermal runaway of the battery, posing a huge safety hazard.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a temperature control method, device, equipment and storage medium for an energy storage system, aiming to solve the technical problem in the prior art that the battery charging and discharging performance is poor due to the excessively high battery temperature.

[0006] To achieve the above object, the present invention provides a temperature control method for an energy storage system, the temperature control method for an energy storage system comprising the following steps:

[0007] Acquire the operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics;

[0008] Predicting the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature;

[0009] When the predicted battery temperature is greater than a first preset safety temperature threshold, the current ambient temperature is adjusted so that the energy storage system operates at the target ambient temperature obtained after adjustment.

[0010] Optionally, when the predicted battery temperature is greater than a first preset safety temperature threshold, adjusting the current ambient temperature so that the energy storage system operates at a target ambient temperature obtained after adjustment, includes:

[0011] When the predicted battery temperature is greater than the first preset safety temperature threshold, obtaining a battery ambient temperature characteristic between an ambient temperature and the battery temperature;

[0012] The refrigeration device is controlled to adjust the current ambient temperature according to the battery ambient temperature characteristics to obtain a target ambient temperature.

[0013] Optionally, after the step of adjusting the current ambient temperature when the predicted battery temperature is greater than a first preset safety temperature threshold so that the energy storage system operates at a target ambient temperature obtained after adjustment, the step further includes:

[0014] When the target ambient temperature reaches the minimum ambient safety temperature, the current charge and discharge power is adjusted to the maximum safe charge and discharge power so that the battery operating temperature is less than the first preset safety temperature threshold.

[0015] Optionally, before the step of adjusting the current charge and discharge power to the maximum safe charge and discharge power when the target ambient temperature reaches the minimum ambient safety temperature so that the battery operating temperature is less than the first preset safety temperature threshold, the step further includes:

[0016] Obtain the functional relationship between charge and discharge power and ambient temperature, battery temperature rise characteristics, and battery operating temperature;

[0017] The maximum safe charge and discharge power is obtained based on the functional relationship according to the current ambient temperature, the battery temperature rise characteristic and the first preset threshold temperature.

[0018] Optionally, predicting the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature includes:

[0019] Acquire a battery temperature rise time function based on the operating parameters, wherein the battery temperature rise time function is a function of battery temperature changing with time under a fixed ambient temperature, a fixed charge and discharge power, and a fixed temperature rise characteristic;

[0020] The battery temperature of the energy storage system at the next moment is predicted based on the temperature rise time function and the current battery temperature to obtain a predicted battery temperature.

[0021] Optionally, the temperature control method of the energy storage system further includes:

[0022] When the predicted battery temperature is greater than a second preset safety temperature threshold, the charging and discharging operation is stopped, wherein the second preset safety temperature threshold is greater than the first preset temperature threshold.

[0023] Optionally, the temperature control method of the energy storage system further includes:

[0024] When the energy storage system is not working, the refrigeration device is controlled to adjust the current ambient temperature so that the current ambient temperature is within a preset standby temperature range.

[0025] In addition, to achieve the above-mentioned purpose, the present invention further proposes a temperature control device for an energy storage system, the temperature control device for the energy storage system comprising:

[0026] A data acquisition module is used to acquire operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics;

[0027] A temperature prediction module, used to predict the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature;

[0028] The temperature regulating module is used to regulate the current ambient temperature when the predicted battery temperature is greater than a first preset safety temperature threshold, so that the energy storage system operates at a target ambient temperature obtained after regulation.

[0029] In addition, to achieve the above-mentioned purpose, the present invention also proposes a temperature control device, which includes: a memory, a processor, and a temperature control program of an energy storage system stored in the memory and executable on the processor, wherein the temperature control program of the energy storage system is configured to implement the steps of the temperature control method of the energy storage system as described above.

[0030] In addition, to achieve the above objectives, the present invention also proposes a storage medium, on which a temperature control program of an energy storage system is stored. When the temperature control program of the energy storage system is executed by a processor, the steps of the temperature control method of the energy storage system described above are implemented.

[0031] The present invention obtains the operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics; predicts the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature; when the predicted battery temperature is greater than the first preset safety temperature threshold, adjusts the current ambient temperature so that the energy storage system operates at the target ambient temperature obtained after adjustment. The present invention adjusts the ambient temperature by predicting the battery operating temperature at the next moment, thereby keeping the battery operating temperature within the safe temperature range, solving the technical problem of poor battery charging and discharging performance due to excessively high battery temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a temperature control device for a hardware operating environment involved in an embodiment of the present invention;

[0033] Figure 2 It is a schematic flow chart of a first embodiment of a temperature control method for an energy storage system according to the present invention;

[0034] Figure 3 It is a flow chart of a second embodiment of a temperature control method for an energy storage system according to the present invention;

[0035] Figure 4 It is a flow chart of a third embodiment of a temperature control method for an energy storage system according to the present invention;

[0036] Figure 5 It is a structural block diagram of the first embodiment of the temperature control device of the energy storage system of the present invention.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0039] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of the temperature control device of the hardware operating environment involved in the embodiment of the present invention.

[0040] like Figure 1As shown, the temperature control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0041] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the temperature control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0042] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a temperature control program of the energy storage system.

[0043] exist Figure 1 In the temperature control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the temperature control device of the present invention can be set in the temperature control device, and the temperature control device calls the temperature control program of the energy storage system stored in the memory 1005 through the processor 1001, and executes the temperature control method of the energy storage system provided in the embodiment of the present invention.

[0044] The embodiment of the present invention provides a temperature control method for an energy storage system, referring to Figure 2 , Figure 2 It is a flow chart of the first embodiment of the temperature control method of the energy storage system of the present invention.

[0045] In this embodiment, the temperature control method of the energy storage system includes the following steps:

[0046] Step S10: Acquire the operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics.

[0047] It should be noted that the executor of this embodiment may be an energy storage device; the energy storage device includes various sensor detection elements, and also includes various devices such as a main controller. In this embodiment, the current battery temperature and the current ambient temperature may be detected by a temperature sensor, or other devices may be used; the energy storage device includes a battery management system; the current charge and discharge power refers to the charge and discharge power of a single battery module in the energy storage device at the current time point, and the energy storage device includes multiple battery modules; the current charge and discharge power may be obtained by detecting the input / output power of each battery module; the battery temperature rise characteristic refers to the changing relationship between the battery temperature and the ambient temperature and the battery charge and discharge power; the temperature rise characteristic may be obtained through multiple charge and discharge tests, and all the obtained data related to the battery temperature rise characteristic may be transmitted to the battery management system.

[0048] Step S20: predicting the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature.

[0049] It should be noted that the next moment refers to the moment after the current moment and corresponding to the unit time interval with the current moment. The predicted battery temperature is the battery temperature corresponding to the next moment obtained by prediction. The unit time, i.e., the time interval, can be set manually. It is necessary to ensure that even if the battery temperature value exceeds a certain value during the time interval, it will not affect the performance of the battery itself, or the impact caused can be ignored; and when the operating parameters remain unchanged, the battery temperature rises with time, so the predicted battery temperature is the highest temperature of the battery from the current moment to the next moment; by calculating through the operating parameters, the temperature-time curve of the battery temperature under the current conditions can be obtained. Through this curve, the time constant can be introduced to predict the battery temperature at the next moment.

[0050] Step S30: When the predicted battery temperature is greater than a first preset safety temperature threshold, the current ambient temperature is adjusted so that the energy storage system operates at the target ambient temperature obtained after adjustment.

[0051] It should be noted that the first preset safety temperature threshold is a preset maximum temperature threshold at which the battery can be in a normal working state. The first preset safety temperature threshold can be set manually or obtained through experiments; the target ambient temperature refers to the ambient temperature that can make the battery temperature at the next moment lower than the first preset temperature threshold; the target ambient temperature can be calculated based on the relationship between the ambient temperature and the battery temperature.

[0052] In a specific implementation, when the predicted battery temperature is greater than a first preset safety temperature threshold, the ambient temperature is adjusted according to the temperature rise characteristics of the battery, and the battery temperature is affected by lowering the ambient temperature, so that the battery temperature is reduced or no longer rises, thereby preventing the battery temperature from exceeding the first preset temperature threshold in the next time period.

[0053] This embodiment obtains the operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics; predicts the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature; when the predicted battery temperature is greater than the first preset safety temperature threshold, adjusts the current ambient temperature so that the energy storage system operates at the target ambient temperature obtained after adjustment. This embodiment adjusts the ambient temperature by predicting the battery operating temperature at the next moment, thereby keeping the battery operating temperature within the safe temperature range, solving the technical problem of poor battery charging and discharging performance due to excessively high battery temperature.

[0054] refer to Figure 3 , Figure 3 Schematic diagram of the flow chart of the second embodiment of the temperature control method of the energy storage system of the present invention.

[0055] Based on the above first embodiment, in this embodiment, step S30 includes:

[0056] Step S31: when the predicted battery temperature is greater than the first preset safety temperature threshold, obtaining a battery ambient temperature characteristic between the ambient temperature and the battery temperature;

[0057] It should be noted that the battery ambient temperature characteristic refers to the changing relationship between the battery temperature and the ambient temperature when other operating parameters except the ambient temperature remain unchanged; in this embodiment, the changing law of the battery ambient temperature characteristic can be obtained by charging and discharging the battery at different ambient temperatures and different charge and discharge rates, so as to fit the changing relationship of the ambient temperature; the changing relationship of the ambient temperature characteristic at each power is stored in the battery management system so that it can be called at any time.

[0058] Step S32: controlling a refrigeration device to adjust the current ambient temperature according to the battery ambient temperature characteristics to obtain a target ambient temperature.

[0059] It is understandable that it takes a certain amount of time for the refrigeration device to adjust the ambient temperature, and it takes a certain amount of time for the temperature to drop. Therefore, the ambient temperature calculated through the ambient temperature characteristics is not the target ambient temperature, and the ambient temperature is usually a range value that cannot be limited very accurately. Therefore, the target ambient temperature is usually slightly lower than the calculated ambient temperature, thereby ensuring that the battery temperature does not exceed the first preset safety temperature threshold at the next moment.

[0060] In this embodiment, after step S30, the following steps are further included:

[0061] Step S40: When the target ambient temperature reaches the minimum ambient safety temperature, the current charge and discharge power is adjusted to the maximum safe charge and discharge power so that the battery operating temperature is less than the first preset safety temperature threshold.

[0062] It is understandable that the ambient temperature will have a certain impact on other components of the energy storage system, and due to the limitations of the refrigeration device, the ambient temperature cannot be further adjusted after it drops to a certain level; the minimum ambient safety temperature refers to the minimum value of the currently adjustable ambient temperature threshold. After the ambient temperature drops to this threshold, the ambient temperature cannot be further lowered.

[0063] It should be noted that when the ambient temperature cannot be further adjusted, the battery power can be adjusted to ensure that the battery operating temperature does not exceed the first preset safety temperature threshold.

[0064] It should be understood that, under the condition that the operating temperature of the battery is ensured to be lower than the first preset safety temperature threshold, the battery operates at the maximum safe charging and discharging power, which can maximize the charging and discharging performance of the battery.

[0065] In this embodiment, before step S40, the following steps are also included:

[0066] Step S01: Obtain the functional relationship between the charge and discharge power and the ambient temperature, the battery temperature rise characteristic and the battery operating temperature.

[0067] It should be noted that the battery can be charged and discharged under different ambient temperatures and different charge and discharge rates to obtain a fitting function relationship between the battery temperature rise characteristics and the charge and discharge power. Due to different ambient temperatures, multiple different function change relationships can be obtained, and then the multiple function relationships are stored in the battery management system.

[0068] Step S02: obtaining the maximum safe charge and discharge power based on the functional relationship according to the current ambient temperature, the battery temperature rise characteristic and the first preset threshold temperature.

[0069] It can be understood that the maximum safe charge and discharge power is the charge and discharge power that can make the battery temperature at the next moment not exceed the first preset safety temperature threshold; in this embodiment, the battery temperature at the next moment is assumed to be the first preset safety temperature threshold, and the relevant function relationship can be called according to the current ambient temperature, and then the battery temperature rise characteristics and the first preset threshold temperature are substituted into the relationship to obtain the maximum safe charge and discharge power; wherein, the battery temperature rise characteristics can be extracted from a pre-stored battery temperature rise characteristics database according to parameters such as the current ambient temperature, the current charge and discharge power, and the current battery temperature.

[0070] In this embodiment, when the ambient temperature reaches the minimum ambient safety temperature, the battery operating temperature can also be controlled by adjusting the charge and discharge power. When the ambient temperature adjustment cannot meet the temperature requirement, it is further ensured that the battery will not be damaged or have poor performance due to excessive temperature.

[0071] refer to Figure 4 , Figure 4 Schematic diagram of the flow chart of the third embodiment of the temperature control method of the energy storage system of the present invention.

[0072] Based on the above embodiments, in this embodiment, step S20 includes:

[0073] Step S21: obtaining a battery temperature rise time function based on the operating parameters, wherein the battery temperature rise time function is a function of battery temperature changing with time under a fixed ambient temperature, a fixed charge and discharge power, and a fixed temperature rise characteristic;

[0074] Step S22: predicting the battery temperature of the energy storage system at the next moment based on the temperature rise time function and the current battery temperature to obtain a predicted battery temperature.

[0075] It should be noted that in this embodiment, by performing charge and discharge tests at different ambient temperatures and different charge and discharge powers, a set of curves of battery temperature changing with time is obtained. When the ambient temperature and charge and discharge power are fixed, the corresponding curve of battery temperature changing with time is a unique curve. The multiple curves obtained in this way are used to establish a data set and stored in the battery management system; for example, when the ambient temperature ranges from 0℃ to 1℃ and the charge and discharge power is 1KW, the time curve of the battery temperature, the starting point of the time curve should be the current ambient temperature.

[0076] It can be understood that according to the current ambient temperature and the current charge and discharge power in the operating parameters, the corresponding battery temperature change curve over time can be obtained, the current time corresponding to the curve is obtained through the current battery temperature, and then the time corresponding to the predicted battery temperature is obtained through the preset time interval. The battery temperature corresponding to the predicted temperature corresponding to the time is the predicted battery temperature.

[0077] In this embodiment, the temperature control method of the energy storage system further includes: stopping charging and discharging when the predicted battery temperature is greater than a second preset safety temperature threshold, wherein the second preset safety temperature threshold is greater than the first preset temperature threshold.

[0078] It is understandable that the second preset safety temperature threshold is a temperature value for judging the working state of the battery. When the current battery temperature is greater than the second preset safety temperature threshold, the battery temperature may be too high to cause fire, explosion and other safety accidents. At this time, when the battery temperature reaches the second preset safety temperature threshold, the energy storage system will stop working to avoid safety accidents. Of course, when the current battery temperature is less than the second preset safety temperature threshold, although the battery is in a high-temperature working state, the battery will not have the above-mentioned dangerous emergency situations.

[0079] In this embodiment, the temperature control method of the energy storage system further includes: when the energy storage system is not working, controlling the refrigeration device to adjust the current ambient temperature so that the current ambient temperature is within a preset standby temperature range.

[0080] It is understandable that when the energy storage system is not working, the ambient temperature can be adjusted to the standby ambient temperature, which not only protects the equipment of the energy storage system but also saves the power consumption of the energy storage system.

[0081] In this embodiment, the corresponding battery temperature rise time function is obtained through operating parameters, and the battery temperature at the next moment is accurately predicted, so that the energy storage system can cool the battery in advance, avoiding the problem of poor performance caused by excessive battery temperature.

[0082] In addition, an embodiment of the present invention further provides a storage medium on which a temperature control program of an energy storage system is stored. When the temperature control program of the energy storage system is executed by a processor, the steps of the temperature control method of the energy storage system described above are implemented.

[0083] Reference Figure 5 , Figure 5 It is a structural block diagram of the first embodiment of the temperature control device of the energy storage system of the present invention.

[0084] like Figure 5 As shown, the temperature control device of the energy storage system proposed in the embodiment of the present invention includes:

[0085] The data acquisition module 501 is used to acquire the operating parameters of the energy storage system, wherein the operating parameters include: the current battery temperature, the current ambient temperature, the current charge and discharge power, and the battery temperature rise characteristics;

[0086] It should be noted that the executor of this embodiment may be a computer; in this embodiment, the current battery temperature and the current ambient temperature may be detected by a temperature sensor, or other devices may be used; the detected data is transmitted to the computer, which includes a battery management system; the current charge and discharge power refers to the charge and discharge power of the battery module, and the energy storage system includes multiple battery modules; the current charge and discharge power can be obtained by detecting the input / output power of each battery module; the battery temperature rise characteristic refers to the changing relationship between the battery temperature, the ambient temperature and the battery power; the temperature rise characteristic can be obtained through multiple charge and discharge tests, and all acquired data will be transmitted to the battery management system.

[0087] A temperature prediction module 502 is used to predict the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature;

[0088] It should be noted that the predicted battery temperature refers to the battery temperature at a certain time interval from the current time. The time interval can be set manually, and it is necessary to ensure that even if the battery temperature exceeds a certain value during the time interval, it will not affect the battery, or the impact can be ignored; and when the operating parameters remain unchanged, the battery temperature generally rises, so the predicted battery temperature is the highest temperature of the battery in the time period from the current moment to the next moment; by calculating through the operating parameters, the temperature-time curve of the battery temperature under the current conditions can be obtained, and through this curve, the time constant can be introduced to predict the battery temperature at the next moment.

[0089] The temperature regulating module 503 is used to regulate the current ambient temperature when the predicted battery temperature is greater than a first preset safety temperature threshold, so that the energy storage system operates at a target ambient temperature obtained after the regulation.

[0090] It should be noted that the first preset safety temperature threshold can be set manually or can be a battery safety temperature value obtained through experiments; the ambient temperature is adjusted according to the temperature rise characteristics of the battery, and then the battery temperature is affected by the reduction of the ambient temperature, so that the battery temperature is reduced or no longer rises, and the battery temperature is prevented from exceeding the first preset temperature threshold in the next time period; the target ambient temperature refers to the ambient temperature that makes the battery temperature at the next moment less than the first preset temperature threshold; the target ambient temperature can be obtained by calculation.

[0091] This embodiment obtains the operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics; predicts the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature; when the predicted battery temperature is greater than the first preset safety temperature threshold, adjusts the current ambient temperature so that the energy storage system operates at the target ambient temperature obtained after adjustment. This embodiment adjusts the ambient temperature by predicting the battery operating temperature at the next moment, and changes the charge and discharge power, thereby keeping the battery operating temperature within the safe temperature range, solving the technical problem of poor battery charge and discharge performance due to excessively high battery temperature.

[0092] In one embodiment, the temperature regulation module 503 is also used to obtain the battery ambient temperature characteristics between the ambient temperature and the battery temperature when the predicted battery temperature is greater than the first preset safety temperature threshold, and control the refrigeration device to adjust the current ambient temperature according to the battery ambient temperature characteristics to obtain the target ambient temperature.

[0093] In one embodiment, the temperature adjustment module 503 is further used to adjust the current charge and discharge power to the maximum safe charge and discharge power when the target ambient temperature reaches the minimum ambient safety temperature, so that the battery operating temperature is lower than the first preset safety temperature threshold.

[0094] In one embodiment, the temperature regulation module 503 is also used to obtain the functional relationship between the charging and discharging power and the ambient temperature, the battery temperature rise characteristics and the battery operating temperature, and based on the functional relationship, obtain the maximum safe charging and discharging power according to the current ambient temperature, the battery temperature rise characteristics and the first preset threshold temperature.

[0095] In one embodiment, the temperature prediction module 502 is further used to obtain a battery temperature rise time function based on the operating parameters, wherein the battery temperature rise time function is a function of battery temperature variation over time under a fixed ambient temperature, a fixed charge and discharge power, and a fixed temperature rise characteristic. Based on the temperature rise time function and the current battery temperature, the battery temperature of the energy storage system at the next moment is predicted to obtain a predicted battery temperature.

[0096] In one embodiment, the temperature control device of the energy storage system further includes: a control module, which is used to stop charging and discharging when the predicted temperature of the battery is greater than a second preset safety temperature threshold, wherein the second preset safety temperature threshold is greater than the first preset temperature threshold.

[0097] In one embodiment, the control module is further configured to control the refrigeration device to adjust the current ambient temperature when the energy storage system is not working, so that the current ambient temperature is within a preset standby temperature range.

[0098] Other embodiments or specific implementations of the temperature control device of the energy storage system of the present invention can refer to the above-mentioned method embodiments, which will not be described in detail here.

[0099] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0100] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0101] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0102] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A temperature control method for an energy storage system, characterized in that: The temperature control method of the energy storage system comprises the following steps: Obtaining operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics, wherein the battery temperature rise characteristics refer to the changing relationship between the battery temperature and the ambient temperature and the battery charge and discharge power; Predicting the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature; When the predicted battery temperature is greater than a first preset safety temperature threshold, adjusting the current ambient temperature so that the energy storage system operates at a target ambient temperature obtained after adjustment; The step of predicting the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain the predicted battery temperature includes: Acquire a battery temperature rise time function based on the operating parameters, wherein the battery temperature rise time function is a function of battery temperature changing with time under a fixed ambient temperature, a fixed charge and discharge power, and a fixed temperature rise characteristic; The battery temperature of the energy storage system at the next moment is predicted based on the temperature rise time function and the current battery temperature to obtain a predicted battery temperature.

2. The temperature control method of the energy storage system according to claim 1, characterized in that: When the predicted battery temperature is greater than a first preset safety temperature threshold, adjusting the current ambient temperature so that the energy storage system operates at a target ambient temperature obtained after adjustment, includes: When the predicted battery temperature is greater than the first preset safety temperature threshold, obtaining a battery ambient temperature characteristic between an ambient temperature and the battery temperature; The refrigeration device is controlled to adjust the current ambient temperature according to the battery ambient temperature characteristics to obtain a target ambient temperature.

3. The temperature control method of the energy storage system according to claim 1, characterized in that: After the step of adjusting the current ambient temperature when the predicted battery temperature is greater than the first preset safety temperature threshold so that the energy storage system operates at the target ambient temperature obtained after adjustment, the method further includes: When the target ambient temperature reaches the minimum ambient safety temperature, the current charge and discharge power is adjusted to the maximum safe charge and discharge power so that the battery operating temperature is less than the first preset safety temperature threshold.

4. The temperature control method of the energy storage system according to claim 3, characterized in that: Before the step of adjusting the current charge and discharge power to the maximum safe charge and discharge power when the target ambient temperature reaches the minimum ambient safety temperature so that the battery operating temperature is less than the first preset safety temperature threshold, the step further includes: Obtain the functional relationship between charge and discharge power and ambient temperature, battery temperature rise characteristics, and battery operating temperature; The maximum safe charge and discharge power is obtained based on the functional relationship according to the current ambient temperature, the battery temperature rise characteristic and the first preset safety temperature threshold.

5. The temperature control method of the energy storage system according to claim 1, characterized in that: The temperature control method of the energy storage system further includes: When the predicted battery temperature is greater than a second preset safety temperature threshold, the charging and discharging operation is stopped, wherein the second preset safety temperature threshold is greater than the first preset safety temperature threshold.

6. The temperature control method of the energy storage system according to claim 2, characterized in that: The temperature control method of the energy storage system also includes: When the energy storage system is not working, the refrigeration device is controlled to adjust the current ambient temperature so that the current ambient temperature is within a preset standby temperature range.

7. A temperature control device for an energy storage system, characterized in that: The temperature control device of the energy storage system is implemented by the temperature control method of the energy storage system according to claim 1, and the temperature control device of the energy storage system comprises: A data acquisition module is used to acquire operating parameters of the energy storage system, wherein the operating parameters include: current battery temperature, current ambient temperature, current charge and discharge power, and battery temperature rise characteristics; A temperature prediction module, used to predict the battery temperature of the energy storage system at the next moment according to the operating parameters to obtain a predicted battery temperature; The temperature regulating module is used to regulate the current ambient temperature when the predicted battery temperature is greater than a first preset safety temperature threshold, so that the energy storage system operates at a target ambient temperature obtained after regulation.

8. A temperature control device, characterized in that: The temperature control device includes: a memory, a processor, and a temperature control program of the energy storage system stored in the memory and executable on the processor, wherein the temperature control program of the energy storage system is configured to implement the steps of the temperature control method of the energy storage system as described in any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a temperature control program for an energy storage system, and when the temperature control program for the energy storage system is executed by a processor, the steps of the temperature control method for the energy storage system according to any one of claims 1 to 6 are implemented.

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