Power station management method and device, storage medium and program product

Abstract

The invention provides a power station management method and device, a storage medium and a program product, and the method comprises the steps: predicting the arrival time of a next load state of a power station according to the scheduling data of the power station in a state that the power station has no load; according to the arrival time of the next load state, before the next load state arrives, when it is judged that an energy consumption saving condition is met according to the current environment temperature and the current cell temperature of the battery system and the environment temperature of the battery system in the next load state, the liquid cooling unit is started, and pre-cooling treatment is conducted on the battery system. In the state that the power station has no load, that is, when the boosting and converting integrated cabin does not work, pre-cooling is carried out through the liquid cooling unit, and only the liquid cooling unit works in the pre-cooling process, so that simultaneous working of the liquid cooling unit and the boosting and converting integrated cabin is avoided, the heat island effect of the power station is reduced, the liquid cooling unit can work at a relatively low environment temperature, and the working efficiency of the power station is improved. And the energy consumption of the liquid cooling unit is reduced, so that the power consumption of the thermal management system is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage, and in particular to a power station management method, equipment, storage medium and program product. Background Art

[0002] In recent years, with the high-quality development of the energy storage industry, higher requirements have been placed on the efficiency and life of energy storage systems. As a key subsystem for temperature control and auxiliary power consumption of energy storage systems, thermal management systems face more stringent challenges. In addition to meeting the temperature control requirements for the battery system, it is also necessary to further reduce the electrical power loss (i.e. power consumption) of the thermal management system.

[0003] At present, the thermal management strategy of liquid-cooled energy storage systems mainly depends on the temperature of the battery system and the water temperature of the liquid cooling unit. When the temperature of the battery system reaches a certain threshold, the thermal management system will start the liquid cooling unit and cool the battery system by lowering the water temperature of the liquid cooling unit to a preset value to prevent the equipment from overheating.

[0004] However, the above method may be affected by multiple factors such as the heat island effect of the power station and the ambient temperature, resulting in high power consumption of the thermal management system. Summary of the invention

[0005] The present application provides a power plant management method, device, storage medium and program product for reducing the power consumption of a thermal management system.

[0006] In a first aspect, the present application provides a thermal management method for a power station, wherein the power station includes a boost converter integrated cabin and a liquid-cooled energy storage system, wherein the liquid-cooled energy storage system includes a battery system and a liquid cooling unit, and the method includes:

[0007] When the power station is in a state of no load, predicting the arrival time of the next load state of the power station according to the dispatching data of the power station;

[0008] According to the arrival time of the next load state, before the next load state is arrived, if it is determined that the energy saving conditions are met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system.

[0009] In a second aspect, the present application provides a thermal management device for a power station, the power station comprising a boost converter integrated cabin and a liquid-cooled energy storage system, the liquid-cooled energy storage system comprising a battery system and a liquid cooling unit, the thermal management device for the power station comprising:

[0010] A load prediction module, used for predicting the arrival time of the next load state of the power station according to the dispatching data of the power station when the power station is in a state of no load;

[0011] A pre-cooling module is used to start a liquid cooling unit to pre-cool the battery system according to the arrival time of the next load state. If it is determined that the energy saving conditions are met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state before the next load state is reached, the liquid cooling unit is started.

[0012] In a third aspect, the present application provides an electronic device, including: a memory, a processor, and a transceiver;

[0013] The memory stores computer-executable instructions;

[0014] The processor executes the computer-executable instructions stored in the memory to implement the method according to the first aspect.

[0015] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in the first aspect.

[0016] In a fifth aspect, the present application provides a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor.

[0017] The present application provides a power station management method, equipment, storage medium and program product. The method predicts the arrival time of the next load state of the power station according to the dispatching data of the power station when the power station is in a state of no load; according to the arrival time of the next load state, before the arrival of the next load state, when it is determined that the energy saving conditions are met according to the current ambient temperature and the current cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system. When the power station is in a state of no load, that is, when the boost converter cabin is not working, pre-cooling is performed by the liquid cooling unit. During the pre-cooling process, only the liquid cooling unit works, avoiding the liquid cooling unit and the boost converter cabin working at the same time, reducing the heat island effect of the power station, enabling the liquid cooling unit to work at a lower ambient temperature, reducing the energy consumption of the liquid cooling unit, and thus reducing the power consumption of the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 A schematic diagram of the structure of a liquid-cooled energy storage system power station provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a process flow of a power plant thermal management method provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of another power plant thermal management method provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a thermal management device for a power station provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0024] Description of reference numerals:

[0025] 10-boosting and converter integrated cabin; 20-liquid cooling energy storage system;

[0026] 101-power conversion system; 102-transformer;

[0027] 1011- heat dissipation air inlet of power conversion system; 1012- heat dissipation air outlet of power conversion system;

[0028] 1021-transformer cooling air inlet; 1022-transformer cooling air outlet;

[0029] 201-liquid cooling unit; 202-battery system;

[0030] 2011-air inlet of liquid cooling unit; 2012-air outlet of liquid cooling unit.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0033] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in one or more embodiments of this specification are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards, and corresponding operation entrances shall be provided for users to choose to authorize or refuse.

[0034] It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, and they should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0035] In recent years, with the high-quality development of the energy storage industry, higher requirements have been placed on the efficiency and life of energy storage systems. As a key subsystem for temperature control and auxiliary power consumption of energy storage systems, thermal management systems face more stringent challenges. In addition to meeting the temperature control requirements for the battery system, it is also necessary to further reduce the electrical power loss (i.e. power consumption) of the thermal management system.

[0036] Figure 1 This is a schematic diagram of the structure of a liquid-cooled energy storage system power station provided in an embodiment of the present application. Figure 1 As shown, the power station includes a boost converter cabin 10 and a liquid-cooled energy storage system 20.

[0037] The boost converter cabin 10 includes a power conversion system (PCS) 101 and a transformer 102. The PCS 101 includes a PCS heat dissipation air inlet 1011 and a PCS heat dissipation air outlet 1012. The transformer 102 includes a transformer heat dissipation air inlet 1021 and a transformer heat dissipation air outlet 1022. The PCS heat dissipation air inlet 1011, the PCS heat dissipation air outlet 1012, the transformer heat dissipation air inlet 1021 and the transformer heat dissipation air outlet 1022 are all used for heat dissipation.

[0038] The liquid-cooled energy storage system 20 includes a liquid cooling unit 201 and a battery system 202. The liquid cooling unit 201 includes a liquid cooling unit air inlet 2011 and a liquid cooling unit air outlet 2012. The liquid cooling unit 201 is used to cool the battery system 202.

[0039] When the power station is in a load state, that is, when the power station is in a charging and discharging state, the boost converter cabin 10 and the battery system 202 in the liquid-cooled energy storage system 20 work simultaneously, that is, the boost converter cabin 10 and the battery system 202 dissipate heat simultaneously, resulting in a high overall ambient temperature of the power station, and a heat island effect of the power station occurs. The battery system 202 is cooled by turning on the liquid cooling unit 201. During the cooling process, as the ambient temperature increases, the coefficient of performance (COP) of the liquid cooling unit 201 decreases, which in turn increases the power consumption of the liquid cooling unit 201.

[0040] At present, the thermal management strategy of the liquid-cooled energy storage system mainly depends on the temperature of the battery system 202 and the water temperature of the liquid cooling unit 201. When the temperature of the battery system 202 reaches a certain threshold, the thermal management system will start the liquid cooling unit 201, and perform cooling operations by lowering the water temperature of the liquid cooling unit 201 to a preset value to prevent the device from overheating, thereby ensuring that the battery system 202 is maintained within the normal operating temperature range.

[0041] However, the above method may be affected by multiple factors such as the heat island effect of the power station and the ambient temperature, resulting in a large power consumption of the thermal management system of the liquid-cooled energy storage system.

[0042] In order to solve the above technical problems, the embodiment of the present application proposes a power station thermal management method, which predicts the arrival time of the next load state of the power station according to the dispatching data of the power station when the power station is in a state of no load; according to the arrival time of the next load state, before the arrival of the next load state, when it is determined that the energy saving conditions are met according to the current ambient temperature and the current cell temperature of the battery system, and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system. When the power station is in a state of no load, that is, when the boost converter cabin is not working, pre-cooling is performed by the liquid cooling unit. During the pre-cooling process, only the liquid cooling unit works, avoiding the liquid cooling unit and the boost converter cabin from working at the same time, reducing the heat island effect of the power station, and at the same time enabling the liquid cooling unit to work at a lower ambient temperature, reducing the energy consumption of the liquid cooling unit, thereby reducing the power consumption of the thermal management system.

[0043] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0044] Figure 2A flow chart of a power plant thermal management method provided in an embodiment of the present application. The execution subject of the method may be an electronic device for implementing power plant thermal management, which is implemented by software and hardware, and may be a server deployed locally or in the cloud. For example, the electronic device may be a server in a thermal management system. The power plant includes a boost converter cabin and a liquid-cooled energy storage system, and the liquid-cooled energy storage system includes a battery system and a liquid cooling unit. Figure 2 As shown, the specific steps of this method are as follows:

[0045] S201. When the power station is in an unloaded state, predict the arrival time of the next load state of the power station according to the dispatching data of the power station.

[0046] The method of this embodiment aims to pre-cool the battery system by means of a liquid cooling unit when the power station is in an unloaded state and before the next load state comes.

[0047] To this end, in this step, the server in the thermal management system can obtain the power of the battery system in real time. According to the power of the battery system, it is determined whether the power station is currently loaded. If the power of the battery system is 0, it means that the power station is in a no-load state; if the power of the battery system is not 0, it means that the power station is in a loaded state.

[0048] In the deployment of a power plant, the dispatching data of the power plant is usually input into the power plant in advance. The server of the thermal management system can obtain the dispatching data of the power plant. Based on the dispatching data of the power plant, the server of the thermal management system can determine the arrival time of the next load state of the power plant.

[0049] The dispatching data of the power station refers to the dispatching or planning of charging or discharging of the power station. For example, an example of the dispatching data is: the power station discharges from 10:00 to 11:00 on January 1; the power station discharges from 10:00 to 11:00 on January 2. According to the dispatching data, it can be determined that the arrival time of the next load state of the power station is 10:00 on January 1, and the duration range of the next load state is 10:00 to 11:00 on January 1.

[0050] Optionally, any prediction model for predicting the future load state of a power station can be used to predict the load state of the power station in the future, and the arrival time of the next load state of the power station can be determined according to the prediction result. In addition, any other method for determining the arrival time of the next load state of the power station can be used, which is not specifically limited here.

[0051] S202. Based on the arrival time of the next load state, before the next load state is reached, if it is determined that the energy saving condition is met based on the current ambient temperature and the current cell temperature of the battery system, as well as the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system.

[0052] The ambient temperature of the battery system under the next load state refers to the ambient temperature of the area where the battery system is located at the time when the next load state of the power station is reached. The ambient temperature of the battery system under the next load state can be determined by prediction, for example, according to the weather forecast of the area where the battery system is located, the ambient temperature of the area where the battery system is located at the time when the next load state of the power station is reached can be determined, and the ambient temperature of the battery system under the next load state can be obtained.

[0053] In this step, before the next load state of the power station is reached, it is possible to comprehensively consider various factors, such as the current ambient temperature of the battery system, the current battery cell temperature and the ambient temperature of the battery system under the next load state, to determine whether the energy saving conditions are currently met, that is, to determine whether pre-cooling treatment by the liquid cooling unit can reduce the energy consumption of the thermal management system before the next load state of the power station is reached.

[0054] The energy saving conditions include: pre-cooling is required and pre-cooling can save energy.

[0055] First, the server may determine whether the battery system needs to be pre-cooled according to the current ambient temperature of the battery system and the ambient temperature of the battery system under the next load state.

[0056] For example, if the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, it means that the ambient temperature of the battery system when the next load state is reached has increased, and it can be determined that the battery system needs to be pre-cooled (i.e., cooled in advance). If the current ambient temperature of the battery system is greater than or equal to the ambient temperature of the battery system under the next load state, it means that the ambient temperature of the battery system when the next load state is reached has decreased, and it can be determined that the battery system does not need to be pre-cooled.

[0057] For example, if the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, and the ambient temperature of the battery system under the next load state is greater than or equal to a preset threshold, it means that the ambient temperature of the battery system has increased when the next load state is reached, and the ambient temperature is high, then it can be determined that the battery system needs to be pre-cooled.

[0058] If the current ambient temperature of the battery system is greater than or equal to the ambient temperature of the battery system under the next load state, or the ambient temperature of the battery system under the next load state is less than the preset threshold, it means that the ambient temperature of the battery system when the next load state is reached is lower, or the ambient temperature when the next load state is reached is low, and it can be determined that the battery system does not need to be pre-cooled. The preset threshold can be set according to the needs of the actual application, and this embodiment does not limit this.

[0059] In this step, the server can further determine whether pre-cooling the battery system can achieve the purpose of saving energy consumption based on the current ambient temperature and current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state.

[0060] Specifically, the server can calculate the pre-cooling energy consumption of the thermal management system to reduce the current battery cell temperature to the preset temperature under the current ambient temperature based on the COP corresponding to the current ambient temperature of the battery system and the current battery cell temperature; and, based on the COP corresponding to the ambient temperature of the battery system under the next load state and the current battery cell temperature, calculate the predicted cooling energy consumption of the thermal management system to reduce the current battery cell temperature to the preset temperature under the ambient temperature under the next load state.

[0061] If the pre-cooling energy consumption at the current ambient temperature and the predicted cooling energy consumption under the next load state meet the preset energy consumption conditions, it means that pre-cooling the battery system can achieve the purpose of saving energy consumption. If the pre-cooling energy consumption at the current ambient temperature and the predicted cooling energy consumption under the next load state do not meet the preset energy consumption conditions, it means that pre-cooling the battery system cannot achieve the purpose of saving energy consumption.

[0062] The preset energy consumption condition may be: the pre-cooling energy consumption at the current ambient temperature is less than the predicted cooling energy consumption under the next load state; or the preset energy consumption condition may be: the pre-cooling energy consumption at the current ambient temperature is less than the predicted cooling energy consumption under the next load state multiplied by a scaling factor, wherein the scaling factor may be 0.9, 0.8, etc. In addition, the preset energy consumption condition may also be set according to the needs of the actual application, which is not limited in this embodiment.

[0063] When it is determined that pre-cooling is required and pre-cooling can save energy, the server determines that the energy saving condition is currently met, and then starts the liquid cooling unit to pre-cool the battery system.

[0064] If it is determined that pre-cooling is not necessary or pre-cooling cannot save energy, the server determines that the energy saving conditions are not met, and does not start the liquid cooling unit and does not pre-cool the battery system. By pre-cooling the battery system, the battery cell temperature is lowered in advance, thereby reducing energy consumption and controlling the temperature of the battery system within a lower temperature range, which is conducive to extending the life of the battery cell and improving the stability of the battery system.

[0065] In the implementation of this application, when the power station is in a state of no load, the arrival time of the next load state of the power station is predicted based on the dispatching data of the power station; based on the arrival time of the next load state, before the arrival of the next load state, when it is determined that the energy saving conditions are met based on the current ambient temperature and the current cell temperature of the battery system, as well as the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system. When the power station is in a state of no load, that is, when the boost converter cabin is not working, pre-cooling is performed by the liquid cooling unit. During the pre-cooling process, only the liquid cooling unit works, avoiding the liquid cooling unit and the boost converter cabin from working at the same time, reducing the heat island effect of the power station, and at the same time enabling the liquid cooling unit to work at a lower ambient temperature, reducing the energy consumption of the liquid cooling unit, thereby reducing the power consumption of the thermal management system.

[0066] Figure 3 A schematic diagram of another power plant thermal management method provided in an embodiment of the present application. Figure 3 As shown, the specific steps of this method are as follows:

[0067] S301. Obtain the power of the battery system at the current moment.

[0068] In this step, the server can obtain the power of the battery system in real time.

[0069] S302: Determine whether the power station is in a no-load state.

[0070] According to the power of the battery system at the current moment, it can be determined whether the power station is currently loaded. Specifically, if the power of the battery system is 0, it means that the power station is in a no-load state; if the power of the battery system is not 0, it means that the power station is in a loaded state.

[0071] If the power station is in a no-load state, then S303 is continued to be executed to predict the arrival time of the next load state of the power station, so as to determine whether to perform pre-cooling processing on the battery system according to the arrival time.

[0072] If the power station is in a load state, it means that the battery system cannot be pre-cooled, then continue to execute S313-S318, adopt a conventional cooling strategy, and when the battery cell temperature is high, start the liquid cooling unit to cool the battery system.

[0073] S303: predicting the arrival time of the next load state of the power station.

[0074] In this step, the arrival time of the next load state can be determined based on the dispatching data of the power station, or any prediction model for predicting the future load state of the power station can be used to predict the arrival time of the next load state. Any other method for determining the arrival time of the next load state of the power station can also be used, which is not specifically limited here.

[0075] S304: Determine whether the time difference between the arrival time of the next load state and the system time is less than a preset time length.

[0076] In this step, the time difference between the arrival time of the next load state and the current system time is calculated, and it is determined whether the time difference is less than a preset time length. The preset time length can be set according to the needs of the actual application, and this embodiment does not limit this. For example, the preset time length can be 2 hours.

[0077] If the time difference between the arrival time of the next load state and the system time is less than the preset time length, continue to execute S313-S318, adopt the conventional cooling strategy, and when the battery cell temperature is high, start the liquid cooling unit to cool the battery system.

[0078] If the time difference between the arrival time of the next load state and the system time is greater than or equal to the preset time length, then when the time difference is equal to the preset time length, execute steps S305-S311, adopt an intelligent pre-cooling strategy, and start the liquid cooling unit to pre-cool the battery system while meeting the energy saving conditions.

[0079] S305 , determining whether the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state.

[0080] In this step, the current ambient temperature of the battery system and the ambient temperature of the battery system under the next load state are obtained, and it is determined whether the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, so as to determine whether the battery system needs to be pre-cooled.

[0081] The current ambient temperature of the battery system can be obtained by detecting the real-time temperature of the space where the battery system is located, or can be determined according to the current weather forecast. The ambient temperature of the battery system under the next load state can be determined by prediction, for example, according to the weather forecast of the area where the battery system is located, the ambient temperature of the area where the battery system is located at the time of arrival of the next load state of the power station can be determined, and the ambient temperature of the battery system under the next load state can be obtained.

[0082] If the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, it can be determined that the battery system needs to be pre-cooled, and S306 is executed.

[0083] If the current ambient temperature of the battery system is greater than or equal to the ambient temperature of the battery system under the next load state, it can be determined that the battery system does not need to be pre-cooled, and S312 is executed to end the pre-cooling.

[0084] S306 . Predicting the pre-cooling energy consumption under the current ambient temperature and the predicted cooling energy consumption under the next load state according to the current battery core temperature.

[0085] In this step, the server obtains the current cell temperature of the battery system in real time.

[0086] A battery system generally includes multiple battery cells, each of which may have a different temperature. In this embodiment, the current battery cell temperature may be the highest temperature of each battery cell temperature. In some optional embodiments, the current battery cell temperature may also be the average temperature of each battery cell temperature, or the temperature of a specified battery cell in the battery system, which is not specifically limited here.

[0087] Furthermore, the server predicts the pre-cooling energy consumption at the current ambient temperature based on the current cell temperature of the battery system. This can be achieved in the following way: subtract the first exit temperature threshold from the current cell temperature to obtain the temperature difference required to pre-cool the battery system; multiply the temperature difference by the specific heat capacity of the battery system, then by the mass of the battery system, and then divide by the COP corresponding to the current ambient temperature to obtain the pre-cooling energy consumption at the current ambient temperature. This process can be expressed as: ,in, Indicates the pre-cooling energy consumption at the current ambient temperature, Indicates the current battery cell temperature. represents the first exit temperature threshold, represents the specific heat capacity of the battery system, Indicates the quality of the battery system, Indicates the COP corresponding to the current ambient temperature.

[0088] The server predicts the cooling energy consumption under the next load state based on the current cell temperature of the battery system. This can be achieved in the following way: subtract the first exit temperature threshold from the current cell temperature to obtain the temperature difference required to cool the battery system; multiply the temperature difference by the specific heat capacity of the battery system, then by the mass of the battery system, and then divide it by the COP corresponding to the ambient temperature under the next load state to obtain the predicted cooling energy consumption under the next load state. The process can be expressed as: ,in, represents the predicted cooling energy consumption under the next load state, Indicates the current battery cell temperature. represents the first exit temperature threshold, Table battery system specific heat capacity, Indicates the quality of the battery system, Indicates the COP corresponding to the ambient temperature under the next load state.

[0089] The first exit temperature threshold may be set according to actual application requirements, and this embodiment does not limit this.

[0090] S307: Determine whether the preset energy consumption condition is met.

[0091] The preset energy consumption condition may be: the pre-cooling energy consumption at the current ambient temperature is less than the predicted cooling energy consumption under the next load state; or the preset energy consumption condition may be: the pre-cooling energy consumption at the current ambient temperature is less than the predicted cooling energy consumption under the next load state multiplied by a scaling factor, wherein the scaling factor may be 0.9, 0.8, etc. In addition, the preset energy consumption condition may also be set according to the needs of the actual application, which is not limited in this embodiment.

[0092] If the pre-cooling energy consumption at the current ambient temperature and the predicted cooling energy consumption under the next load state meet the preset energy consumption conditions, it means that pre-cooling the battery system can achieve the purpose of saving energy consumption, and then S308 is executed.

[0093] If the pre-cooling energy consumption at the current ambient temperature and the predicted cooling energy consumption under the next load state do not meet the preset energy consumption conditions, it means that pre-cooling the battery system cannot achieve the purpose of saving energy consumption, then S312 is executed to end the pre-cooling.

[0094] S308: Determine whether the current battery cell temperature of the battery system is less than a first start-up temperature threshold.

[0095] If the current cell temperature of the battery system is greater than or equal to the first start-up temperature threshold, S309 is executed to start the liquid cooling unit to pre-cool the battery system.

[0096] If the current cell temperature of the battery system is lower than the first start-up temperature threshold, it means that pre-cooling is not required, and S312 is executed to end pre-cooling.

[0097] S309: Start the liquid cooling unit to pre-cool the battery system.

[0098] In this step, the liquid cooling unit is started, and the inlet water temperature of the liquid cooling unit is adjusted to the second temperature, wherein the second temperature can be set and adjusted according to the needs of the actual application scenario, and is not specifically limited here.

[0099] In this embodiment, the liquid cooling unit is started to pre-cool the battery system only when the energy saving condition is met, that is, when it is determined that pre-cooling is required and energy can be saved by pre-cooling, which can greatly reduce the energy consumption of the thermal management system.

[0100] S310, monitoring the battery cell temperature of the battery system in real time.

[0101] S311 . Determine whether the battery cell temperature of the battery system is less than a first exit temperature threshold.

[0102] In this embodiment, during the pre-cooling process of the battery system, the server may monitor the cell temperature of the battery system in real time.

[0103] If the cell temperature of the battery system is greater than or equal to the first exit temperature threshold, there is no need to end the pre-cooling process, and steps S310-S311 are executed in a loop until the cell temperature of the battery system is less than the first exit temperature threshold, then S312 is executed to end the pre-cooling and shut down the liquid cooling unit in time to save energy.

[0104] S312, end pre-cooling.

[0105] In this step, the pre-cooling of the battery system is completed. If the liquid cooling unit is in the on state, the liquid cooling unit is turned off.

[0106] Optionally, after the pre-cooling of the battery system is completed, S313-S318 may be continued to be executed, and a conventional cooling strategy may be adopted. When the temperature of the battery cell is high, the liquid cooling unit may be started to cool the battery system.

[0107] The following steps S313-S318 are a process of cooling the battery system using a conventional cooling strategy.

[0108] S313. Monitor the cell temperature of the battery system in real time.

[0109] S314: Determine whether the battery cell temperature of the battery system is greater than or equal to a second start-up temperature threshold.

[0110] In this embodiment, based on a conventional cooling strategy, the server can monitor the battery cell temperature of the battery system in real time.

[0111] If the cell temperature of the battery system is lower than the second start-up temperature threshold, S313 - S324 are executed in a loop until the cell temperature of the battery system is higher than or equal to the second start-up temperature threshold.

[0112] When the cell temperature of the battery system is greater than or equal to the second start temperature threshold, S315 is executed to start the liquid cooling unit, and adjust the inlet water temperature of the liquid cooling unit to the first temperature to perform conventional cooling treatment on the battery system.

[0113] It should be noted that, if the cell temperature of the battery system is still lower than the second start-up temperature threshold when the power station ends the load state, S318 is executed to end the conventional cooling of the battery system.

[0114] S315, starting the liquid cooling unit, and adjusting the inlet water temperature of the liquid cooling unit to the first temperature.

[0115] The second startup temperature threshold and the first temperature can be set according to the needs of actual application, which is not limited in this embodiment. The second startup temperature threshold is usually greater than or equal to the first startup temperature threshold.

[0116] In this embodiment, when the current cell temperature of the battery system is greater than or equal to the second starting temperature threshold, the liquid cooling unit is started, and the inlet water temperature of the liquid cooling unit is adjusted to the first temperature, and the battery system is subjected to conventional cooling treatment to reduce the cell temperature so that the battery system is within a normal operating temperature range to avoid overheating of the equipment.

[0117] S316. Monitor the battery cell temperature of the battery system in real time.

[0118] S317: Determine whether the battery cell temperature of the battery system is less than a second exit temperature threshold.

[0119] In this embodiment, during the process of cooling the battery system using a conventional cooling strategy, the server can monitor the cell temperature of the battery system in real time.

[0120] If the cell temperature of the battery system is greater than or equal to the second exit temperature threshold, there is no need to end the cooling process, and steps S316-S317 are executed in a loop until the cell temperature of the battery system is less than the second exit temperature threshold, then S318 is executed to end conventional cooling in time and shut down the liquid cooling unit to save energy.

[0121] The second exit temperature threshold may be set according to actual application requirements, and this embodiment does not limit this.

[0122] S318, end conventional cooling.

[0123] In this step, the conventional cooling of the battery system is terminated. If the liquid cooling unit is in the on state, the liquid cooling unit is turned off.

[0124] In the solution of this embodiment, when the power station is in a load state or will enter a load state in a short time (i.e., the time difference between the arrival time of the next load state and the current system time is less than the preset time length), a conventional cooling strategy is used to perform conventional cooling treatment on the battery system to ensure that the battery system is in a normal operating temperature range. When the power station is not loaded and the time difference between the arrival time of the next load state and the current system time is greater than or equal to the preset time length, an intelligent pre-cooling strategy is used to pre-cool the battery system to reduce the battery system temperature in advance, which can reduce the energy consumption of the thermal management system and control the temperature of the battery system within a lower temperature range, which is conducive to extending the life of the battery cell.

[0125] In an optional embodiment, on the basis of the conventional cooling strategy and the intelligent pre-cooling strategy, an intelligent cooling exit strategy can be added during the execution of the conventional cooling strategy. When certain conditions are met, the liquid cooling unit is turned off and the conventional cooling strategy is exited, so that the battery system can be cooled naturally, which can save energy.

[0126] Specifically, during the process of the power station executing the conventional cooling strategy, after the power station enters the no-load state, if the liquid cooling unit is still in the startup state, the temperature of the battery system after natural cooling within a period of time can be predicted based on the time difference between the arrival time of the next load state and the current system time, the current ambient temperature of the battery system and the current battery cell temperature, and the cooling rate of the battery system during natural cooling. If the temperature of the battery system after natural cooling within this period of time is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally to save energy.

[0127] For example, the server can predict the temperature of the battery system after natural cooling within the time difference between the arrival time of the next load state and the system time based on the time difference between the arrival time of the next load state and the system time, the current ambient temperature of the battery system and the current cell temperature, and the cooling rate of the battery system during natural cooling. If the temperature of the battery system after natural cooling within the time difference is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally, thereby saving energy consumption.

[0128] The temperature of the battery system after natural cooling over a period of time refers to the temperature of the battery cells after the battery system has been naturally cooled over a period of time.

[0129] Specifically, the server can use the natural cooling cooling rate multiplied by the length of the natural cooling time period to obtain the temperature that can be reduced by natural cooling within the time period; then use the current battery cell temperature of the battery system minus the temperature that can be reduced by natural cooling to obtain the temperature of the battery system after natural cooling at that time.

[0130] The cooling rate of natural cooling can be obtained by technicians according to experiments. For example, the cooling rate of natural cooling can be set to 0.3 degrees / hour.

[0131] The target temperature may be the same as the second exit temperature threshold, or the same as the first exit temperature threshold, and may be specifically set according to actual application requirements, which is not limited in this embodiment.

[0132] In this implementation, after the previous load state ends and before the next load state arrives, if the liquid cooling unit is in the startup state, the temperature of the battery system after natural cooling before the next load state arrives can be predicted. If the temperature after natural cooling can reach the target temperature, it means that the cooling target of the battery system can be achieved without using the liquid cooling unit, so the liquid cooling unit is turned off to save energy.

[0133] Optionally, when the above-mentioned time difference is greater than the preset time length, the server can also predict the temperature of the battery system after natural cooling within the time length obtained by subtracting the preset time length. If the temperature of the battery system after natural cooling within the time length is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally, thereby saving energy consumption.

[0134] Before the next load state arrives, if the temperature after natural cooling can reach the target temperature within a short period of time (the remaining time after deducting the preset time length from the time difference), it means that the battery system can be cooled well without using a liquid cooling unit. In this case, the liquid cooling unit is turned off to save energy.

[0135] It should be noted that before shutting down the liquid cooling unit to allow the battery system to cool naturally, the server needs to ensure that the current ambient temperature of the battery system is lower than the current battery cell temperature, and that the absolute value of the difference between the current ambient temperature and the current battery cell temperature is greater than or equal to the preset difference threshold to ensure that the battery system can cool naturally.

[0136] The preset difference threshold can be set according to the needs of the actual application, and this embodiment does not limit this. For example, the preset difference threshold can be set to 10 degrees.

[0137] In an optional embodiment, after the battery system is naturally cooled, the aforementioned intelligent pre-cooling strategy may be used to pre-cool the battery system within a preset time length before the next load state is reached.

[0138] The solution of the present application, by combining an intelligent pre-cooling strategy, a conventional cooling strategy and an intelligent cooling exit strategy, can ensure that the battery system can be effectively cooled under different load and temperature conditions, ensure that the battery system is within the normal operating temperature range, and at the same time reduce the power consumption of the thermal management system.

[0139] Figure 4 This is a schematic diagram of the structure of a power station thermal management device provided in an embodiment of the present application. Figure 4 As shown, the power plant thermal management device 400 includes: a load prediction module 401 and a pre-cooling module 402 .

[0140] The load prediction module 401 is used to predict the arrival time of the next load state of the power station according to the dispatching data of the power station when the power station has no load;

[0141] The pre-cooling module 402 is used to start the liquid cooling unit to pre-cool the battery system according to the arrival time of the next load state, before the next load state is arrived, if it is determined that the energy saving conditions are met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state.

[0142] In an optional implementation, if it is determined that the energy saving condition is met based on the current ambient temperature and the current cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system, and the pre-cooling module 402 is specifically used to:

[0143] When the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, the pre-cooling energy consumption under the current ambient temperature and the cooling energy consumption under the next load state are predicted; if the pre-cooling energy consumption under the current ambient temperature and the cooling energy consumption under the next load state meet the energy saving conditions, and the current battery cell temperature is greater than or equal to the first starting temperature threshold, the liquid cooling unit is started to pre-cool the battery system.

[0144] In an optional implementation, the pre-cooling module 402 is further used for:

[0145] The battery cell temperature of the battery system is monitored in real time, and when the battery cell temperature of the battery system is lower than the first exit temperature threshold, the liquid cooling unit is turned off.

[0146] In an optional implementation, according to the arrival time of the next load state, before the next load state is arrived, if it is determined that the energy saving condition is met according to the current ambient temperature and the current cell temperature of the battery system and the ambient temperature of the battery system under the next load state, then the liquid cooling unit is started to pre-cool the battery system, and the pre-cooling module 402 is specifically used to:

[0147] According to the time difference between the arrival time of the next load state and the system time, when the time difference is equal to the preset time length, if it is determined that the energy saving conditions are met based on the current ambient temperature of the battery system and the current battery cell temperature, as well as the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system.

[0148] In an optional implementation, the load prediction module 401 and the pre-cooling module 402 are further used to:

[0149] When the power station is under load, if the current cell temperature of the battery system is greater than or equal to the second start temperature threshold, the liquid cooling unit is started, and the inlet water temperature of the liquid cooling unit is adjusted to the first temperature.

[0150] In an optional implementation, the load prediction module 401 and the pre-cooling module 402 are further used to:

[0151] The battery cell temperature of the battery system is monitored in real time, and when the battery cell temperature of the battery system is lower than the second exit temperature threshold, the liquid cooling unit is turned off.

[0152] In an optional implementation, the load prediction module 401 and the pre-cooling module 402 are further used to:

[0153] After the power station enters the no-load state, if the liquid cooling unit is in the startup state, the temperature of the battery system after natural cooling within the time difference is predicted based on the time difference between the arrival time of the next load state and the system time, the current ambient temperature of the battery system and the current battery cell temperature, and the cooling rate of the battery system during natural cooling. If the temperature of the battery system after natural cooling within the time difference is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally.

[0154] In an optional implementation, the load prediction module 401 and the pre-cooling module 402 are further used to:

[0155] When the time difference is greater than the preset time length, the temperature of the battery system after natural cooling within the time length obtained by subtracting the preset time length from the time difference is predicted. If the temperature after natural cooling is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally.

[0156] The power plant thermal management device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0157] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown, the electronic device 500 includes: a memory 501, a processor 502 and a transceiver 503. Among them, the memory 501 is used to store a computer program, and the processor 502 implements the method of any of the above embodiments when executing the computer program. There is a communication link between the memory 501 and the processor 502. Exemplarily, the memory 501, the processor 502 and the transceiver 503 can communicate through a communication bus 504.

[0158] Optionally, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps in the method embodiments disclosed in the present application may be directly implemented as being executed by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0159] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, a method in any of the above method embodiments is implemented.

[0160] An embodiment of the present application also provides a computer program product, including a computer program, which implements the method in any of the above method embodiments when the computer program is executed by a processor.

[0161] 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 device 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 device. 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 device including the element.

[0162] The order of the above-mentioned embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. In addition, in some of the processes described in the above-mentioned embodiments and the accompanying drawings, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed or executed in parallel in the order in which they appear in this article, and are only used to distinguish between different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or less operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., do not represent the order of precedence, and do not limit "first" and "second" to different types. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0163] After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present application. The present application is intended to cover any variation, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present application are indicated by the following claims. It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is limited only by the attached claims. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application is described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalent; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power plant thermal management method, characterized in that: The power station includes a boost converter cabin and a liquid-cooled energy storage system, the liquid-cooled energy storage system includes a battery system and a liquid cooling unit, and the method includes: When the power station is in a state of no load, predicting the arrival time of the next load state of the power station according to the dispatching data of the power station; According to the arrival time of the next load state, before the next load state is arrived, if it is determined that the energy saving conditions are met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system.

2. The method according to claim 1, characterized in that If it is determined that the energy saving condition is met according to the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system, including: When the current ambient temperature of the battery system is lower than the ambient temperature of the battery system under the next load state, predicting the pre-cooling energy consumption under the current ambient temperature and the cooling energy consumption under the next load state; If the pre-cooling energy consumption under the current ambient temperature and the cooling energy consumption under the next load state meet the energy saving condition, and the current battery cell temperature is greater than or equal to the first start-up temperature threshold, the liquid cooling unit is started to pre-cool the battery system.

3. The method according to claim 2, characterized in that Also includes: The battery cell temperature of the battery system is monitored in real time, and when the battery cell temperature of the battery system is less than a first exit temperature threshold, the liquid cooling unit is turned off.

4. The method according to any one of claims 1 to 3, characterized in that: According to the arrival time of the next load state, before the next load state is reached, if it is determined that the energy saving condition is met according to the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state, then the liquid cooling unit is started to pre-cool the battery system, including: According to the time difference between the arrival time of the next load state and the system time, when the time difference is equal to the preset time length, if it is determined that the energy saving condition is met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state, the liquid cooling unit is started to pre-cool the battery system.

5. The method according to claim 1, characterized in that Also includes: When the power station is under load, if the current cell temperature of the battery system is greater than or equal to the second start-up temperature threshold, the liquid cooling unit is started, and the inlet water temperature of the liquid cooling unit is adjusted to the first temperature.

6. The method according to claim 5, characterized in that Also includes: The battery cell temperature of the battery system is monitored in real time, and when the battery cell temperature of the battery system is less than a second exit temperature threshold, the liquid cooling unit is turned off.

7. The method according to claim 5, characterized in that Also includes: After the power station enters a no-load state, if the liquid cooling unit is in a startup state, the temperature of the battery system after natural cooling within the time difference is predicted based on the time difference between the arrival time of the next load state and the system time, the current ambient temperature and the current cell temperature of the battery system, and the temperature drop rate of the battery system during natural cooling; If the temperature of the battery system after natural cooling within the time difference is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally.

8. The method according to claim 7, characterized in that Also includes: When the time difference is greater than a preset time length, the temperature of the battery system after natural cooling within the time length obtained by subtracting the preset time length from the time difference is predicted; if the temperature after natural cooling is less than or equal to the target temperature, the liquid cooling unit is turned off to allow the battery system to cool naturally.

9. A thermal management device for a power station, characterized in that: The power station includes a boost converter cabin and a liquid-cooled energy storage system, the liquid-cooled energy storage system includes a battery system and a liquid cooling unit, and the power station thermal management equipment includes: A load prediction module, used for predicting the arrival time of the next load state of the power station according to the dispatching data of the power station when the power station is in a state of no load; A pre-cooling module is used to start a liquid cooling unit to pre-cool the battery system according to the arrival time of the next load state. If it is determined that the energy saving conditions are met based on the current ambient temperature and the current battery cell temperature of the battery system and the ambient temperature of the battery system under the next load state before the next load state is reached, the liquid cooling unit is started.

10. An electronic device, characterized in that: include: memory, processors, and transceivers; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 8 when executed by a processor.

12. A computer program product, characterized in that The method comprises a computer program, which implements the method according to any one of claims 1 to 8 when being executed by a processor.

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