Energy storage system thermal management method, power system, electronic device, and storage medium

Abstract

The application provides a thermal management method of an energy storage system, a power system, an electronic device and a storage medium. The thermal management method comprises the following steps: in response to the fact that the temperature of at least one energy storage module in a plurality of energy storage modules is less than a preset low temperature threshold value, and at least one energy storage module in the plurality of energy storage modules is in a running state, a thermal management module shutdown instruction is sent, so that the thermal management module enters a shutdown state, and all thermal management liquid circuits are connected to form a loop; in response to the fact that the temperature of at least one energy storage module in the plurality of energy storage modules is less than the preset low temperature threshold value, and all the plurality of energy storage modules are in a shutdown state, the thermal management module enters a running state, and each thermal management liquid circuit is connected to the thermal management module to form a loop; and in response to the fact that the temperature of the plurality of energy storage modules is greater than or equal to the preset low temperature threshold value, the thermal management module enters a shutdown state. Based on the above method, the overall efficiency of the energy storage system in which the energy storage device is located can be improved.

Description

Technical Field

[0001] This application relates to the field of temperature control technology, and in particular to thermal management methods for energy storage systems, power systems, electronic devices, and storage media. Background Technology

[0002] With the development of the times, energy storage modules (such as lithium batteries and other modules with energy storage capabilities) have been used on a large scale in energy storage stations or other types of power systems. The use of energy storage modules is accompanied by corresponding heating or cooling operations. By effectively heating or cooling the energy storage modules, the normal operation of the power system can be maintained.

[0003] However, existing energy storage systems that heat or cool energy storage modules have low energy utilization rates, which means that the power of auxiliary sources used for heating or cooling in the power system is high, reducing the energy efficiency of the power system and its benefits, and thus making the overall efficiency of the power system in which the energy storage system is located relatively low. Summary of the Invention

[0004] The main technical problem addressed by this application is to provide a thermal management method, power system, electronic equipment, and storage medium for energy storage systems, which can improve the energy utilization rate of thermal management and thus improve the overall efficiency of the power system in which the energy storage system is located.

[0005] In a first aspect, this application provides a thermal management method for an energy storage system. The energy storage system includes multiple energy storage modules and a thermal management module. Each energy storage module has a thermal management fluid circuit. The thermal management method includes: responding to the condition that at least one of the multiple energy storage modules has a temperature lower than a preset low temperature threshold and at least one of the multiple energy storage modules is in operation, sending a thermal management module shutdown command to cause the thermal management module to enter a shutdown state, and sending a first conduction command to cause all thermal management fluid circuits to conduct and form a loop; responding to the condition that at least one of the multiple energy storage modules has a temperature lower than the preset low temperature threshold and all the multiple energy storage modules are in a shutdown state, sending a thermal management operation command to cause the thermal management module to enter an operation state, and sending a second conduction command to cause each thermal management fluid circuit to conduct and form a loop with the thermal management module; responding to the condition that the temperatures of all the multiple energy storage modules are greater than or equal to the preset low temperature threshold, sending a thermal management module shutdown command to cause the thermal management module to enter a shutdown state.

[0006] In the technical solution of this application embodiment, when the temperature of an energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop, thus achieving heating of the energy storage modules without requiring the thermal management module to consume energy for heating. This improves energy utilization. Furthermore, if all energy storage modules are in a shutdown state, each thermal management fluid circuit can be controlled to form a loop with the thermal management module, controlling the thermal management module to consume energy to heat the energy storage modules, thus ensuring the normal operation of the power system. Based on the above method, it is possible to make the most of the heat generated by the energy storage modules when they are in operation to achieve thermal management of the energy storage modules, and it is also possible to perform thermal management of each energy storage module based on the thermal management module when all energy storage modules are in a shutdown state. This achieves the goal of maximizing the energy utilization of thermal management while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0007] In some embodiments, the thermal management method further includes: in response to at least one of the energy storage modules having a temperature greater than a preset high temperature threshold, sending a thermal management module operation command to cause the thermal management module to enter an operation state, and sending a second conduction command to cause each thermal management liquid circuit to be connected to the thermal management module to form a loop; in response to the temperature of all the energy storage modules being greater than or equal to a preset low temperature threshold, sending a thermal management module shutdown command to cause the thermal management module to enter a shutdown state, including: in response to the temperature of all the energy storage modules being greater than or equal to the preset low temperature threshold and less than or equal to the preset high temperature threshold, sending a thermal management module shutdown command to cause the thermal management module to enter a shutdown state.

[0008] In the technical solution of this application embodiment, when the temperature of an energy storage module is greater than a preset high temperature threshold, it can be determined that at least one energy storage module is too hot and needs to be cooled. At this time, each thermal management liquid circuit can be controlled to form a loop with the thermal management module, and the thermal management module can be controlled to consume energy to cool the energy storage module to ensure the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module, so as to realize the normal operation of the power system and improve the reliability of the power system.

[0009] In some embodiments, in response to at least one energy storage module having a temperature lower than a preset low-temperature threshold and at least one energy storage module being in operation, a thermal management module shutdown command is sent to cause the thermal management module to enter a shutdown state, and a first conduction command is sent to cause all thermal management fluid circuits to conduct and form a loop. This includes: in response to at least one energy storage module having a temperature lower than a preset low-temperature threshold and at least one energy storage module being in operation, a thermal management module shutdown command is sent to cause the thermal management module to enter a shutdown state, and a first conduction command is sent to cause all thermal management fluid circuits to conduct and form a loop; in response to at least one energy storage module having a temperature lower than the preset low-temperature threshold after a first preset time period after causing all thermal management fluid circuits to conduct and form a loop, a thermal management operation command is sent to cause the thermal management module to enter an operation state, and a second conduction command is sent to cause each thermal management fluid circuit to conduct and form a loop with the thermal management module.

[0010] In the technical solution of this application embodiment, when the temperature of an energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management liquid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, improving energy utilization. Furthermore, after a first preset time... If the temperature of any energy storage module is still lower than the preset low temperature threshold, then each thermal management liquid circuit can be controlled to form a loop with the thermal management module. The thermal management module can then consume energy to heat the energy storage module, ensuring the normal operation of the power system. Based on the above method, the heat generated by the energy storage module when it is in operation can be utilized as much as possible to achieve thermal management of the energy storage module. Furthermore, when it is not possible to raise the temperature of all energy storage modules to a level greater than or equal to the preset low temperature threshold based solely on the energy storage modules in operation, thermal management can be performed on each energy storage module based on the thermal management module. This ensures the normal operation of the power system while maximizing the energy utilization rate of thermal management, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0011] In some embodiments, in response to at least one of the multiple energy storage modules having a temperature lower than a preset low temperature threshold, and all the multiple energy storage modules being in a shutdown state, a thermal management operation command is sent to cause the thermal management module to enter an operating state, and a second conduction command is sent to cause each thermal management liquid path to be connected to the thermal management module to form a loop, including: in response to at least one of the multiple energy storage modules having a temperature lower than a preset low temperature threshold, and all the multiple energy storage modules being in a shutdown state, a thermal management operation command is sent to cause the thermal management module to enter an operating state, and a second conduction command is sent to sequentially cause each thermal management liquid path with a temperature lower than the preset low temperature threshold to be connected to the thermal management module to form a loop.

[0012] In the technical solution of this application embodiment, when the temperature of an energy storage module is lower than a preset low temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If all energy storage modules are in a shutdown state at this time, the thermal management liquid circuits of each energy storage module with a temperature lower than the preset low temperature threshold can be controlled to sequentially connect with the thermal management module to form a loop. This enables the thermal management module to consume energy to individually and efficiently heat each energy storage module where the thermal management liquid circuit is located, thereby ensuring the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module when all energy storage modules are in a shutdown state, thereby achieving normal operation of the power system and improving the reliability of the power system.

[0013] In some embodiments, in response to at least one of the multiple energy storage modules having a temperature greater than a preset high temperature threshold, a thermal management module operation command is sent to cause the thermal management module to enter an operating state, and a second conduction command is sent to cause each thermal management liquid path to be connected to the thermal management module to form a loop. This includes: in response to at least one of the multiple energy storage modules having a temperature greater than a preset high temperature threshold, a thermal management operation command is sent to cause the thermal management module to enter an operating state, and a second conduction command is sent to sequentially cause each thermal management liquid path with a temperature greater than the preset high temperature threshold to be connected to the thermal management module to form a loop.

[0014] In the technical solution of this application embodiment, when the temperature of an energy storage module is higher than a preset high temperature threshold, it can be determined that at least one energy storage module is too hot and needs to be cooled. At this time, the thermal management liquid circuits of each energy storage module with a temperature higher than the preset high temperature threshold can be controlled to sequentially connect with the thermal management module to form a loop. This enables the thermal management module to consume energy to individually and efficiently cool each energy storage module where the thermal management liquid circuit is located, thereby ensuring the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module, thereby achieving the normal operation of the power system and improving the reliability of the power system.

[0015] In some embodiments, each pair of adjacent thermal management fluid circuits is connected via a corresponding switching valve; one end of each thermal management fluid circuit is connected to one end of the thermal management module via a first multi-way valve, and the other end of each thermal management fluid circuit is connected to the other end of the thermal management module via a second multi-way valve; sending a first conduction command to enable all thermal management fluid circuits to form a loop includes: sending the first conduction command to control each switching valve to conduct, and based on the first and second multi-way valves, enabling all thermal management fluid circuits to form a loop; and / or, sending a second conduction command to enable each thermal management fluid circuit to connect with the thermal management module to form a loop includes: sending the second conduction command to control each switching valve to disconnect, and based on the first and second multi-way valves, enabling each thermal management fluid circuit to connect with the thermal management module to form a loop.

[0016] In the technical solution of this application embodiment, each switching valve and each multi-way valve can be controlled to make all thermal management fluid circuits interconnected. This allows the heat emitted by the energy storage module in operation to be conducted to the energy storage module with a temperature lower than a preset low temperature threshold through the interconnected thermal management fluid circuits. This enables the energy storage module with a temperature lower than the preset low temperature threshold to be heated based on the heat emitted by the energy storage module in operation without controlling the additional energy consumption of the thermal management module. This maximizes the energy utilization rate of thermal management and improves the overall efficiency of the power system in which the energy storage system is located.

[0017] In some embodiments, in all thermal management fluid circuits, the other end of the first thermal management fluid circuit is connected to one end of another thermal management fluid circuit via a corresponding switching valve, and one end of the last thermal management fluid circuit is connected to the other end of another thermal management fluid circuit via a corresponding switching valve. Furthermore, in the thermal management fluid circuits other than the first and last thermal management fluid circuits, the other end of one thermal management fluid circuit is connected to one end of another thermal management fluid circuit via a corresponding switching valve, so that all thermal management fluid circuits are connected in series via each switching valve.

[0018] In the technical solution of this application embodiment, each switching valve can be controlled to open so that all thermal management fluid circuits are interconnected, and each multi-way valve can be controlled to connect the first thermal management fluid circuit and the last thermal management fluid circuit, so that all thermal management fluid circuits are connected in series to form a loop. This allows the heat emitted by the energy storage module in operation to be conducted to the energy storage module with a temperature lower than a preset low temperature threshold through the interconnected thermal management fluid circuits. This enables the energy storage module with a temperature lower than the preset low temperature threshold to be heated based on the heat emitted by the energy storage module in operation without controlling the additional energy consumption of the thermal management module, thereby maximizing the energy utilization rate of thermal management and improving the overall efficiency of the power system in which the energy storage system is located.

[0019] In some embodiments, the energy storage system further includes a power module for providing power to the liquid in the loop.

[0020] In the technical solution of this application embodiment, the power provided by the power module can accelerate the flow of liquid in the circuit, so that the liquid heated or cooled by the thermal management module can be delivered to the thermal management liquid circuit of the energy storage module to be heated or cooled as soon as possible, thereby improving the efficiency of thermal management.

[0021] In some embodiments, the thermal management module includes a heating module and a cooling module; one end of the heating module is one end of the thermal management module, and the other end of the heating module is the other end of the thermal management module, and the heating module is used to heat the energy storage module whose temperature is lower than a preset low temperature threshold; one end of the cooling module is one end of the thermal management module, and the other end of the cooling module is the other end of the thermal management module, and the cooling module is used to cool the energy storage module whose temperature is higher than a preset high temperature threshold.

[0022] In the technical solution of this application embodiment, the thermal management module may include a heating module for heating energy storage modules with temperatures below a preset low temperature threshold and a cooling module for cooling energy storage modules with temperatures above a preset high temperature threshold. These modules can be used to heat or cool the energy storage modules, respectively. Based on the above method, the thermal management module can be used to heat or cool any energy storage module, thereby improving the applicability of the energy storage system and thus improving the reliability of the energy storage system.

[0023] In some embodiments, one end of the heating module is connected to the first switching end of the three-way valve, one end of the cooling module is connected to the second switching end of the three-way valve, and the first multi-way valve is connected to the common end of the three-way valve; or, the other end of the heating module is connected to the first switching end of the three-way valve, the other end of the cooling module is connected to the second switching end of the three-way valve, and the second multi-way valve is connected to the common end of the three-way valve.

[0024] In the technical solution of this application embodiment, by setting a three-way valve, the liquid in the liquid circuit can selectively flow through the heating module used for heating, the cooling module used for cooling, or the heating module or cooling module after shutdown. It can be controlled according to the usage requirements, thereby improving the applicability of the energy storage system and thus improving the reliability of the energy storage system.

[0025] Secondly, this application provides an electric power system including the above-described energy storage system, which is used to perform the above-described method.

[0026] Thirdly, an electronic device includes: a memory and a processor; the memory is used to store program instructions, and the processor is used to execute the program instructions to implement the above-described method.

[0027] Fourthly, a computer-readable storage medium storing program instructions that, when executed by a processor, implement the above-described method.

[0028] It is understood that the beneficial effects of the second, third and fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic flowchart of one or more embodiments of the thermal management method for the energy storage system provided in this application;

[0032] Figure 2 One of the structural schematic diagrams of one or more embodiments of the energy storage system provided in this application;

[0033] Figure 3 A second schematic diagram of one or more embodiments of the energy storage system provided in this application;

[0034] Figure 4 A third schematic diagram of the structure of one or more embodiments of the energy storage system provided in this application;

[0035] Figure 5 Fourth schematic diagram of one or more embodiments of the energy storage system provided in this application;

[0036] Figure 6 Fifth of one or more structural schematic diagrams of the energy storage system provided in this application;

[0037] Figure 7 A schematic diagram of the structure of one or more embodiments of the power system provided in this application;

[0038] Figure 8 A schematic diagram of the structure of one or more embodiments of the electronic device provided in this application;

[0039] Figure 9A schematic diagram of one or more embodiments of the computer-readable storage medium provided in this application.

[0040] Reference numerals: 11, Energy storage module; 111, Thermal management fluid circuit; 112, Battery cluster; 12, Thermal management module; 121, Heating module; 122, Cooling module; 1221, Evaporator; 1222, Compressor; 1223, Condenser; 1224, Expansion valve; 13, Control module; 21, Switch valve; 22, First multi-way valve; 23, Second multi-way valve; 31, Power module; 41, Transformer; 51, Converter; 61, Converter controller; 62, Battery manager; 63, Energy manager; 70, Power system; 71, Energy storage system; 80, Electronic equipment; 81, Processor; 82, Memory; 83, Bus; 90, Computer-readable storage medium; 91, Program instructions. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] With the development of the times, energy storage modules (such as lithium batteries and other modules with energy storage capabilities) have been used on a large scale in energy storage stations or other types of power systems. The use of energy storage modules is accompanied by corresponding heating or cooling operations. By effectively heating or cooling the energy storage modules, the normal operation of the power system can be maintained.

[0049] Power systems typically draw power from auxiliary sources to control thermal management modules (such as thermal management liquid chillers or other modules with thermal management capabilities) to heat or cool the liquid in the thermal management liquid circuit corresponding to the energy storage module. This enables heating of energy storage modules that are too cold or cooling of energy storage modules that are too hot, so that the energy storage modules can be maintained within the temperature range that allows them to operate normally.

[0050] However, existing energy storage systems that heat or cool energy storage modules have low energy utilization rates, which means that the power of auxiliary sources used for heating or cooling in the power system is high, reducing the energy efficiency of the power system and its benefits, and thus making the overall efficiency of the power system in which the energy storage system is located relatively low.

[0051] In other words, in practice, the greater the power of the auxiliary source, the lower the overall efficiency of the power system. If the energy utilization rate during thermal management is low, then because most of the power of the auxiliary source is occupied by the thermal management module, it is easy to consume more power from the auxiliary source for the same heating or cooling effect. Therefore, the existing power system has a low overall efficiency due to the low energy utilization rate during thermal management.

[0052] Based on the above considerations, this application provides a thermal management method, power system, electronic equipment, and storage medium for an energy storage system. The thermal management method includes: responding to the condition that at least one energy storage module among a plurality of energy storage modules has a temperature lower than a preset low-temperature threshold, and at least one energy storage module among the plurality of energy storage modules is in an operating state, sending a thermal management module shutdown command to cause the thermal management module to enter a shutdown state, and sending a first conduction command to cause all thermal management liquid circuits to conduct and form a loop; responding to the condition that at least one energy storage module among a plurality of energy storage modules has a temperature lower than the preset low-temperature threshold, and all energy storage modules are in a shutdown state, sending a thermal management operation command to cause the thermal management module to enter an operating state, and sending a second conduction command to cause each thermal management liquid circuit to conduct and form a loop with the thermal management module respectively. Based on the above method, the energy utilization rate of thermal management is improved, thereby improving the overall efficiency of the energy storage system in which the energy storage device is located.

[0053] Please refer to Figures 1 to 3 , Figure 1 This is a flowchart illustrating one or more embodiments of the thermal management method for an energy storage system provided in this application. Figure 2 This is a schematic diagram of one or more embodiments of the energy storage system provided in this application. Figure 3 A second schematic diagram of one or more embodiments of the energy storage system provided in this application.

[0054] like Figure 2 and Figure 3 As shown, the energy storage system may include multiple energy storage modules 11, a thermal management module 12, and a control module 13. Figure 3 (Not shown), the energy storage module 11 has a thermal management fluid circuit 111.

[0055] In one example, control module 13 can be used to implement thermal management methods for the energy storage system.

[0056] like Figure 1 As shown, thermal management methods include:

[0057] Step S1: In response to the fact that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and at least one of the multiple energy storage modules 11 is in operation, a thermal management module shutdown command is sent to make the thermal management module 12 enter a shutdown state, and a first conduction command is sent to make all thermal management liquid circuits 111 conduct to form a loop.

[0058] Step S2: In response to the fact that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and all of the multiple energy storage modules 11 are in a shutdown state, a thermal management operation command is sent to enable the thermal management module 12 to enter the operation state, and a second conduction command is sent to enable each thermal management liquid circuit 111 to be connected to the thermal management module 12 to form a loop.

[0059] Step S3: In response to the fact that the temperature of multiple energy storage modules 11 is greater than or equal to the preset low temperature threshold, a shutdown command for the thermal management module is sent, causing the thermal management module 12 to enter the shutdown state.

[0060] Specifically, steps S1, S2, and S3 are parallel and their order is not fixed. Whether step S1 or step S2 is executed depends on the actual situation faced by the energy storage system. For example: when at least one of the multiple energy storage modules 11 is detected to have a temperature lower than a preset low-temperature threshold, and at least one of the multiple energy storage modules 11 is in operation, step S1 can be executed. When at least one of the multiple energy storage modules 11 is detected to have a temperature lower than the preset low-temperature threshold, and all of the multiple energy storage modules 11 are in a shutdown state, step S2 can be executed. When the temperature of all of the multiple energy storage modules 11 is detected to be greater than or equal to the preset low-temperature threshold, step S2 can be executed.

[0061] In one example, energy storage module 11 may refer to a prefabricated energy storage battery system compartment, which may contain multiple energy storage batteries or cells for storing electrical energy.

[0062] The control module 13 can be a separate processing module, or it can be an energy manager or part of an energy manager. This is not limited here. The energy manager (EMS) can be connected to the battery manager (BMS) configured for each energy storage module 11.

[0063] See Figure 4 , Figure 4 A third schematic diagram of the structure of one or more embodiments of the energy storage system provided in this application, as shown in the figure. Figure 4 As shown, assuming there are four energy storage modules 11, these four energy storage modules 11 can be arranged around the thermal management module 12, and this allows... Figure 4Of the four energy storage modules 11 shown, the opening direction of the upper two energy storage modules 11 is set along the target direction D1, while the opening direction of the lower two energy storage modules 11 is set in the opposite direction of the target direction D1, so that each energy storage module 11 has enough space to open the door for maintenance of internal components.

[0064] The number of multiple energy storage modules 11 can also be other numbers. By setting multiple energy storage modules 11 around the thermal management module 12 and reasonably setting the opening direction of each energy storage module 11, the space utilization rate and the maintenance convenience of the energy storage modules 11 can be improved.

[0065] In other examples, the energy storage module 11 can also be other types of modules with energy storage capabilities, depending on the actual needs, and is not limited here.

[0066] like Figure 3 As shown, each energy storage module 11 may have a corresponding thermal management fluid circuit 111, and the thermal management fluid circuits 111 may be connected in series through corresponding switching valves.

[0067] One end of each thermal management fluid passage 111 can be connected to one end of the thermal management module 12 through a multi-way valve, and the other end of each thermal management fluid passage 111 can be connected to the other end of the thermal management module 12 through another multi-way valve.

[0068] When at least one of the multiple energy storage modules 11 has a temperature lower than a preset low-temperature threshold, and at least one of the multiple energy storage modules 11 is in operation, the thermal management module 12 can be controlled to enter a shutdown state. This allows liquid flowing in from one multi-way valve to flow directly through the shutdown thermal management module 12 and out from the other multi-way valve, or liquid flowing in from the other multi-way valve to flow directly through the shutdown thermal management module 12 and out from the first multi-way valve. Furthermore, all switching valves are controlled to open, enabling interconnection of all thermal management fluid paths 111, thereby allowing the thermal management fluid paths 111 to communicate with each other. The system forms a liquid flow loop with the thermal management module 12, which is in operation. The heat generated by the energy storage module 11 during operation is conducted through the liquid in the loop to the energy storage module 11 whose temperature is below the preset low temperature threshold. This heats the energy storage module 11 whose temperature is below the preset low temperature threshold, reducing the possibility that the energy storage module 11 will not be able to operate normally due to its low temperature. Since the heating is done by the heat generated by the energy storage module 11 during operation, the thermal management module 12 does not need to consume energy for heating, which improves the energy utilization rate and the overall efficiency of the power system in which the energy storage system is located.

[0069] When at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold, and all of the energy storage modules 11 are in a shutdown state, since there are no energy storage modules 11 in operation at this time, the heat generated by the energy storage modules 11 in operation cannot be used for heating. Therefore, the thermal management module 12 can be controlled to enter the operating state and consume energy to heat the energy storage modules 11 to restore their temperature, thereby increasing the possibility of normal operation of the energy storage modules 11.

[0070] Based on the above method, when all energy storage modules 11 are shut down, the thermal management module 12 can be controlled to consume energy for heating, so that the energy storage modules 11 with excessively low temperatures can be heated back to their original temperature. Furthermore, when at least one energy storage module 11 is running, the heat generated by the operation of the energy storage module 11 can be used to replace the heat generated by the energy consumed by the thermal management module 12 to heat back the energy storage modules 11 with excessively low temperatures. This can improve the energy utilization rate of thermal management as much as possible while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0071] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, thus improving energy efficiency. Furthermore, if all energy storage modules are in a shutdown state, each thermal management fluid circuit can be controlled to form a loop with the thermal management module, controlling the thermal management module to consume energy to heat the energy storage module, thereby ensuring the normal operation of the power system. Based on the above method, it is possible to make the most of the heat generated by the energy storage module when it is in operation to achieve thermal management of the energy storage module, and it is also possible to perform thermal management of each energy storage module based on the thermal management module when all energy storage modules are in a shutdown state. This achieves the goal of maximizing the energy utilization rate of thermal management while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0072] In some embodiments, the thermal management method further includes:

[0073] In response to the fact that at least one of the multiple energy storage modules 11 has a temperature greater than a preset high temperature threshold, a thermal management operation command is sent to enable the thermal management module 12 to enter the operation state, and a second conduction command is sent to enable each thermal management liquid circuit 111 to be connected to the thermal management module 12 to form a loop.

[0074] Step S3 may specifically include:

[0075] In response to the fact that the temperatures of multiple energy storage modules 11 are all greater than or equal to a preset low temperature threshold and less than or equal to a preset high temperature threshold, a shutdown command for the thermal management module is sent, causing the thermal management module 12 to enter a shutdown state.

[0076] Specifically, when the temperature of at least one of the multiple energy storage modules 11 exceeds a preset high temperature threshold, the thermal management module 12 can be controlled to enter the operating state, and the thermal management module 12 can be controlled to consume energy for cooling, so as to cool down the energy storage module 11 and increase the possibility of normal operation of the energy storage module 11.

[0077] When the temperature of multiple energy storage modules 11 is detected to be greater than or equal to the preset low temperature threshold and less than or equal to the preset high temperature threshold, the thermal management module 12 can be controlled to enter the shutdown state to reduce energy consumption.

[0078] In this application, when the temperature of an energy storage module exceeds a preset high-temperature threshold, it can be determined that at least one energy storage module is overheated and needs to be cooled. At this time, each thermal management liquid circuit can be controlled to form a loop with the thermal management module, and the thermal management module can be controlled to consume energy to cool the energy storage module, so as to ensure the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module, so as to realize the normal operation of the power system and improve the reliability of the power system.

[0079] In some embodiments, step S1 may include:

[0080] In response to the fact that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and at least one of the multiple energy storage modules 11 is in operation, a shutdown command for the thermal management module is sent, causing the thermal management module 12 to enter a shutdown state, and a first conduction command is sent, causing all thermal management liquid circuits 111 to be connected to form a loop.

[0081] In response to the fact that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold after a first preset time period during which all thermal management fluid circuits 111 are connected to form a loop, a thermal management operation command is sent to enable the thermal management module 12 to enter the operation state, and a second connection command is sent to enable each thermal management fluid circuit 111 to be connected to the thermal management module 12 to form a loop.

[0082] Specifically, the first preset duration can be any duration among 30 seconds, 1 minute, 5 minutes, and other durations, depending on actual needs, and is not limited here.

[0083] When at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold, and at least one of the multiple energy storage modules 11 is in operation, the low-temperature energy storage module 11 is first heated by the heat generated by the operating energy storage module 11. After a first preset time, if there is still an energy storage module 11 with a temperature lower than the preset low temperature threshold, it means that the heat generated by the operating energy storage module 11 is insufficient to raise the temperature of all energy storage modules 11 to a level greater than or equal to the preset low temperature threshold. Therefore, the thermal management module 12 can be controlled to enter the operating state to heat the low-temperature energy storage module 11 back to a temperature greater than or equal to the preset low temperature threshold, thereby increasing the probability of normal operation of the energy storage module 11 and improving the reliability of the energy storage system.

[0084] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, improving energy utilization. Furthermore, if, after a first preset time, the temperature of at least one energy storage module is still too low, the thermal management module can be controlled to enter a shutdown state. If the temperature of an energy storage module is lower than a preset low-temperature threshold, each thermal management liquid circuit can be controlled to form a loop with the thermal management module. The thermal management module then consumes energy to heat the energy storage module, ensuring the normal operation of the power system. Based on this method, the heat generated by the energy storage module when it is in operation can be utilized as much as possible for thermal management of the energy storage module. Furthermore, when it is not possible to raise the temperature of all energy storage modules to a level greater than or equal to the preset low-temperature threshold using only the energy storage modules in operation, thermal management can be performed on each energy storage module based on the thermal management module. This ensures the normal operation of the power system while maximizing the energy utilization rate of thermal management, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0085] In some embodiments, step S2 may include:

[0086] In response to the fact that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and all of the multiple energy storage modules 11 are in a shutdown state, a thermal management operation command is sent to enable the thermal management module 12 to enter the operation state, and a second conduction command is sent to sequentially enable the thermal management liquid circuit 111 of each energy storage module 11 with a temperature lower than the preset low temperature threshold to be connected to the thermal management module 12 to form a loop.

[0087] Specifically, when at least one energy storage module 11 has a temperature lower than a preset low temperature threshold, and all energy storage modules 11 are in a shutdown state, the energy storage module 11 with a temperature lower than the preset low temperature threshold is identified. Then, the thermal management liquid circuit 111 of each energy storage module 11 with a temperature lower than the preset low temperature threshold is sequentially connected to the thermal management module 12 in operation to form a loop. The thermal management module 12 then sequentially heats the liquid in the thermal management liquid circuit 111 of each energy storage module 11 with a temperature lower than the preset low temperature threshold, thereby heating up the energy storage module 11 with an excessively low temperature and increasing the likelihood of normal operation of the energy storage system.

[0088] In addition, during the process of sequentially connecting to form a circuit, the thermal management fluid circuit 111 of the energy storage module 11 with the lowest temperature among all the energy storage modules 11 that are not currently connected can be connected to the thermal management module 12 that is in operation to form a circuit, so as to prioritize heating and temperature recovery, thereby further improving the possibility of normal operation of the energy storage system.

[0089] During the process of sequentially connecting to form a circuit, at each second preset time interval, the thermal management fluid circuit 111 of the next energy storage module 11 is switched to connect with the thermal management module 12 to form a circuit, so as to heat up or cool down the next energy storage module 11 based on the thermal management module 12.

[0090] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If all energy storage modules are in a shutdown state at this time, the thermal management liquid circuits of each energy storage module with a temperature lower than the preset low-temperature threshold can be controlled to sequentially connect with the thermal management module to form a loop. This allows the thermal management module to consume energy to individually and efficiently heat each energy storage module with its thermal management liquid circuit, ensuring the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module when all energy storage modules are in a shutdown state, thereby achieving normal operation of the power system and improving its reliability.

[0091] In some embodiments, the thermal management method may further include:

[0092] In response to the fact that at least one of the energy storage modules 11 has a temperature greater than a preset high temperature threshold, a thermal management operation command is sent to enable the thermal management module 12 to enter the operation state, and a second conduction command is sent to sequentially enable the thermal management liquid circuits 111 of each energy storage module 11 with a temperature greater than the preset high temperature threshold to be connected to the thermal management module 12 to form a loop.

[0093] Specifically, when at least one energy storage module 11 has a temperature higher than a preset high temperature threshold, the energy storage module 11 with a temperature higher than the preset high temperature threshold is identified. Then, the thermal management liquid circuit 111 of each energy storage module 11 with a temperature higher than the preset high temperature threshold is connected to the thermal management module 12 in operation to form a loop. The thermal management module 12 then cools the liquid in the thermal management liquid circuit 111 of each energy storage module 11 with a temperature higher than the preset high temperature threshold, thereby cooling down the overheated energy storage module 11 and increasing the likelihood of normal operation of the energy storage system.

[0094] In addition, during the process of sequentially connecting to form a loop, the thermal management fluid circuit 111 of the energy storage module 11 with the highest temperature among all the energy storage modules 11 that are not currently connected can be connected to the thermal management module 12 that is in operation to form a loop, so as to prioritize cooling and further improve the possibility of normal operation of the energy storage system.

[0095] In this application, when the temperature of an energy storage module exceeds a preset high-temperature threshold, it can be determined that at least one energy storage module is overheated and needs to be cooled. At this time, the thermal management liquid circuits of each energy storage module with a temperature exceeding the preset high-temperature threshold can be controlled to sequentially connect with the thermal management module to form a loop. This allows the thermal management module to consume energy to individually and efficiently cool each energy storage module containing the thermal management liquid circuit, ensuring the normal operation of the power system. Based on the above method, thermal management of each energy storage module can be performed based on the thermal management module, enabling the normal operation of the power system and improving the reliability of the power system.

[0096] In some embodiments, such as Figure 3 As shown, each pair of adjacent thermal management fluid lines 111 in the entire thermal management fluid line 111 is connected by a corresponding switching valve 21.

[0097] One end of each thermal management fluid circuit 111 is connected to one end of the thermal management module 12 through a first multi-way valve 22, and the other end of each thermal management fluid circuit 111 is connected to the other end of the thermal management module 12 through a second multi-way valve 23.

[0098] Sending the first conduction command in step S1, causing all thermal management fluid circuits 111 to be connected and form a loop, may include:

[0099] Send the first conduction command to control each switching valve 21 to conduct, and based on the first multi-way valve 22 and the second multi-way valve 23, make all thermal management fluid circuits 111 conduct to form a loop.

[0100] And / or,

[0101] Step S2, which sends the second conduction command to connect each thermal management fluid path 111 to the thermal management module 12 to form a loop, may include:

[0102] Send a second conduction command to control each switching valve 21 to disconnect, and based on the first multi-way valve 22 and the second multi-way valve 23, make each thermal management fluid circuit 111 conduct to the thermal management module 12 to form a loop.

[0103] Specifically, the switching valve 21 can be a valve mechanism that opens or closes the connection between two adjacent thermal management fluid lines 111. The first multi-way valve 22 and the second multi-way valve 23 are both multi-way valves. The multi-way valve can be a valve mechanism that can open or close the connection between any thermal management fluid line 111 and the thermal management module 12. It can make any number of connected thermal management fluid lines 111 simultaneously connected to the thermal management module 12, or it can make all connected thermal management fluid lines 111 simultaneously disconnected from the thermal management module 12. The specific configuration can be determined according to actual needs and is not limited here.

[0104] by Figure 3 For example, in one example, by making each switching valve 21 open, and making the valve located at... Figure 3 The uppermost thermal management fluid line 111 is connected to the thermal management module 12 via the first multi-way valve 22, and enables the thermal management module 12 located at the top to be connected to the thermal management fluid line 111 via the first multi-way valve 22. Figure 3 The lowest thermal management fluid circuit 111 is connected to the thermal management module 12 through the second multi-way valve 23, which allows all thermal management fluid circuits 111 to be connected to form a loop.

[0105] In another example, by turning off each of the switching valves 21, connecting one end of the thermal management fluid circuit 111 of one energy storage module 11 to the thermal management module 12 through the first multi-way valve 22, and connecting the other end of the thermal management fluid circuit 111 of the energy storage module 11 to the thermal management module 12 through the second multi-way valve 23, and disconnecting the other thermal management fluid circuits 111 from each of the multi-way valves, the thermal management fluid circuit 111 of one energy storage module 11 can be connected to the thermal management module 12 to form a loop. Subsequently, the thermal management fluid circuits 111 of each energy storage module 11 can be connected to the thermal management module 12 in sequence to form a loop.

[0106] In this application, each switching valve and each multi-way valve can be controlled to interconnect all thermal management fluid circuits. This allows the heat emitted by the energy storage module in operation to be conducted to the energy storage module whose temperature is below a preset low temperature threshold through the interconnected thermal management fluid circuits. This enables the energy storage module whose temperature is below the preset low temperature threshold to be heated based on the heat emitted by the energy storage module in operation without controlling the additional energy consumption of the thermal management module. This maximizes the energy utilization rate of thermal management and improves the overall efficiency of the power system in which the energy storage system is located.

[0107] Optionally, such as Figure 3As shown, in all the thermal management fluid circuits 111, the other end of the first thermal management fluid circuit 111 is connected to one end of another thermal management fluid circuit 111 through a corresponding switching valve 21, and one end of the last thermal management fluid circuit 111 is connected to the other end of another thermal management fluid circuit 111 through a corresponding switching valve 21. In addition, in the thermal management fluid circuits 111 other than the first and last thermal management fluid circuits 111, the other end of one thermal management fluid circuit 111 is connected to one end of another thermal management fluid circuit 111 through a corresponding switching valve 21, so that all the thermal management fluid circuits 111 are connected in series through each switching valve 21.

[0108] Specifically, with Figure 3 For example, one end of the thermal management fluid circuit 111 can refer to the left end of the thermal management fluid circuit 111, and the other end of the thermal management fluid circuit 111 can refer to the right end of the thermal management fluid circuit 111. Specifically, the first thermal management fluid circuit 111 can be the uppermost thermal management fluid circuit 111, and the last thermal management fluid circuit 111 can be the lowermost thermal management fluid circuit 111. By turning on all the switching valves 21, all the thermal management fluid circuits 111 can be turned on. Then, through the two multi-way valves, the left end of the first thermal management fluid circuit 111 and the right end of the last thermal management fluid circuit 111 are connected. Thus, all the thermal management fluid circuits 111 are connected in series to form a loop.

[0109] In this application, each switching valve can be controlled to open, thereby connecting all thermal management fluid circuits to each other. Furthermore, each multi-way valve can be controlled to connect the first and last thermal management fluid circuits, forming a series loop. This allows the heat emitted by the operating energy storage module to be conducted through the interconnected thermal management fluid circuits to the energy storage module whose temperature is below a preset low-temperature threshold. This enables heating of the energy storage module with a temperature below the preset low-temperature threshold based on the heat emitted by the operating energy storage module without controlling additional energy consumption by the thermal management module. This maximizes the energy utilization rate of thermal management and improves the overall efficiency of the power system in which the energy storage system is located.

[0110] Optionally, the energy storage system also includes a power module 31, which provides power to the liquid in the loop.

[0111] Specifically, the power module 31 can be a pump or other module that can provide power to the liquid in the liquid circuit. The power module 31 can be used to provide power to the liquid in the liquid circuit to increase the flow speed of the liquid heated or cooled by the thermal management module 12 in the above-mentioned circuit, thereby improving the efficiency of heating or cooling the energy storage module 11 and improving the efficiency of thermal management.

[0112] In this application, the power provided by the power module can accelerate the flow of liquid in the circuit, thereby enabling the liquid heated or cooled by the thermal management module to be delivered to the thermal management liquid circuit of the energy storage module to be heated or cooled as soon as possible, thus improving the efficiency of thermal management.

[0113] Optionally, the thermal management module 12 may include a heating module 121 and a cooling module 122.

[0114] One end of the heating module 121 is one end of the thermal management module 12, and the other end of the heating module 121 is the other end of the thermal management module 12. The heating module 121 is used to heat the energy storage module 11 whose temperature is lower than the preset low temperature threshold.

[0115] One end of the cooling module 122 is one end of the thermal management module 12, and the other end of the cooling module 122 is the other end of the thermal management module 12. The cooling module 122 is used to cool the energy storage module 11 when the temperature is higher than the preset high temperature threshold.

[0116] Specifically, such as Figure 3 As shown, the cooling module 122 may include an evaporator 1221, a compressor 1222, a condenser 1223, and an expansion valve 1224.

[0117] In this application, the thermal management module may include a heating module for heating energy storage modules whose temperature is below a preset low temperature threshold and a cooling module for cooling energy storage modules whose temperature is above a preset high temperature threshold. These modules can be used to heat or cool the energy storage modules, respectively. Based on the above method, the thermal management module can be used to heat or cool any energy storage module, thereby improving the applicability of the energy storage system and thus improving the reliability of the energy storage system.

[0118] Furthermore, one end of the heating module 121 is connected to the first switching end of the three-way valve, one end of the cooling module 122 is connected to the second switching end of the three-way valve, and the first multi-way valve 22 is connected to the common end of the three-way valve.

[0119] or,

[0120] The other end of the heating module 121 is connected to the first switching end of the three-way valve, the other end of the cooling module 122 is connected to the second switching end of the three-way valve, and the second multi-way valve 23 is connected to the common end of the three-way valve.

[0121] Specifically, the three-way valve can control its common end to connect to the first switching end or the second switching end, thereby enabling the liquid to flow through the heating module 121 or the cooling module 122.

[0122] In this application, by setting a three-way valve, the liquid in the liquid circuit can selectively flow through the heating module used for heating, the cooling module used for cooling, or the heating module or cooling module after shutdown. This can be controlled according to usage requirements, thereby improving the applicability of the energy storage system and thus improving the reliability of the energy storage system.

[0123] For example, firstly, see Figure 5 , Figure 5 A fourth schematic diagram of the structure of one or more embodiments of the energy storage system provided in this application, as shown in the figure. Figure 5 As shown, the energy storage system may also include a transformer 41 and a converter 51, and the energy storage module may also include at least one battery cluster 112.

[0124] The positive terminal of the battery cluster 112 can be connected to the inverter 51 via a first line and a second line, respectively. The first line may include a resistor R and a switch K3, and the second line may include a switch K2. The negative terminal of the battery cluster 112 can be connected to the inverter 51 via a third line, which includes a switch K1.

[0125] When starting the energy storage system, switches K1 and K3 can be turned on first, so that the capacitor in the inverter 51 can be charged through the battery cluster 112 while the current is limited by the resistor R, thus ensuring high safety during charging.

[0126] After the capacitor is fully charged, switch K3 can be turned off and K2 can be turned on, so that the voltage signal output by battery cluster 112 is converted into a three-phase (A, B and C) voltage signal output by converter 51, and then the voltage is transformed by transformer 41 to finally output a three-phase voltage signal to power the corresponding equipment.

[0127] Second, see Figure 6 , Figure 6 The fifth schematic diagram of one or more embodiments of the energy storage system provided in this application is shown below. Figure 6 As shown, the energy storage system may also include a converter controller 61, a battery manager 62, and an energy manager 63.

[0128] Each energy storage module 11 can be configured with a converter controller 61 and a battery manager 62. The converter controller 61 is used to control the operation of the converter 51 corresponding to the energy storage module 11. The battery manager 62 is used to regulate the charging and discharging operation of the energy storage module 11 and to detect the temperature of the energy storage module 11. Based on whether the detected temperature is greater than the corresponding threshold mentioned above, it can determine whether to send a heating request or a cooling request to the thermal management module 12 to realize the heating or cooling of the energy storage module 11 based on the thermal management module 12.

[0129] The energy manager 63 can be connected to each converter controller 61 and each battery manager 62 via a communication bus to adjust each converter controller 61 and each battery manager 62 in each energy storage system according to the overall situation of the power system.

[0130] In the first example, when the battery manager 62 detects that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and at least one of the multiple energy storage modules 11 is in operation, it generates a corresponding first heating request command.

[0131] In response to the presence of a first heating request command, each switching valve 21 can be turned on, and based on the first multi-way valve 22 and the second multi-way valve 23, all thermal management liquid circuits 111 are turned on to form a loop, so that the energy storage module 11 with a temperature lower than the preset low temperature threshold can be heated by the circulation of liquid in the loop based on the heat generated by the energy storage module 11 in operation.

[0132] In the second example, when the battery manager 62 detects that at least one of the multiple energy storage modules 11 has a temperature lower than a preset low temperature threshold and all energy storage modules 11 are in a shutdown state, it generates a corresponding second heating request command.

[0133] In response to the presence of a second heating request command, each switching valve 21 can be controlled to open, and based on the first multi-way valve 22 and the second multi-way valve 23, each thermal management liquid circuit 111 is connected to the thermal management module 12 to form a loop, so that the energy storage module 11 with a temperature lower than the preset low temperature threshold is heated by the circulation of liquid in the loop and the energy consumed by the thermal management module 12 to generate heat.

[0134] Specifically, when the second heating request command is detected, the number of energy storage modules 11 with temperatures lower than a preset low temperature threshold can be counted, taking the total number of energy storage modules 11 as 2 as an example.

[0135] If the number of energy storage modules 11 with a temperature lower than the preset low temperature threshold is 1, then control each switching valve 21 to open, and control the first multi-way valve 22 and the second multi-way valve 23 to make the 1 energy storage module 11 with a temperature lower than the preset low temperature threshold connected to the thermal management module 12 to form a circuit for heating.

[0136] If the number of energy storage modules 11 with temperatures below the preset low temperature threshold is 2, then each switching valve 21 is opened, and the first multi-way valve 22 and the second multi-way valve 23 are controlled to connect the first energy storage module 11 with a temperature below the preset low temperature threshold to the thermal management module 12 to form a circuit, so as to heat the first energy storage module 11 with a temperature below the preset low temperature threshold. After a second preset time, the first multi-way valve 22 and the second multi-way valve 23 are switched to connect the second energy storage module 11 with a temperature below the preset low temperature threshold to the thermal management module 12 to form a circuit, so as to heat the second energy storage module 11 with a temperature below the preset low temperature threshold.

[0137] After completing the above steps, determine whether the second heating request command can still be detected. If so, return to the step of counting the number of energy storage modules 11 whose temperature is less than the preset low temperature threshold and follow-up steps. Otherwise, stop heating.

[0138] The total number of energy storage modules 11 can also be any number other than 2, and there is no limitation here.

[0139] In the third example, when the battery manager 62 detects that at least one of the multiple energy storage modules 11 has a temperature greater than a preset high temperature threshold, and all energy storage modules 11 are in a shutdown state, it generates a corresponding cooling request command.

[0140] In response to a current cooling request command, each switching valve 21 can be controlled to open, and based on the first multi-way valve 22 and the second multi-way valve 23, each thermal management liquid circuit 111 is connected to the thermal management module 12 to form a loop, so that the energy storage module 11 with a temperature greater than the preset high temperature threshold can be cooled by the circulation of liquid in the loop and the thermal management module 12 consuming energy to absorb heat.

[0141] Specifically, when a cooling request command is detected, the number of energy storage modules 11 with temperatures exceeding a preset high-temperature threshold can be counted, taking a total of 2 energy storage modules 11 as an example.

[0142] If the number of energy storage modules 11 with a temperature greater than the preset high temperature threshold is 1, then control each switching valve 21 to open, and control the first multi-way valve 22 and the second multi-way valve 23 to make the 1 energy storage module 11 with a temperature greater than the preset high temperature threshold connected to the thermal management module 12 to form a circuit for cooling.

[0143] If the number of energy storage modules 11 with temperatures exceeding the preset high-temperature threshold is 2, then each switching valve 21 is opened, and the first multi-way valve 22 and the second multi-way valve 23 are controlled to connect the first energy storage module 11 with a temperature exceeding the preset high-temperature threshold to the thermal management module 12 to form a circuit, thereby cooling the first energy storage module 11 with a temperature exceeding the preset high-temperature threshold. After a second preset time, the first multi-way valve 22 and the second multi-way valve 23 are switched to connect the second energy storage module 11 with a temperature exceeding the preset high-temperature threshold to the thermal management module 12 to form a circuit, thereby cooling the second energy storage module 11 with a temperature exceeding the preset high-temperature threshold.

[0144] After completing the above steps, determine whether a cooling request command can still be detected. If so, return to the step of counting the number of energy storage modules 11 whose temperature is greater than the preset high temperature threshold and follow-up steps. Otherwise, stop cooling.

[0145] The total number of energy storage modules 11 can also be any number other than 2, and there is no limitation here.

[0146] Please refer to Figure 7 , Figure 7 A schematic diagram of the structure of one or more embodiments of the power system provided in this application, such as Figure 7 As shown, the power system 70 includes an energy storage system 71. The energy storage system 71 can be the energy storage system described in any of the preceding embodiments, and the energy storage system 71 can be used to execute the thermal management method described in any of the preceding embodiments, which will not be repeated here.

[0147] Specifically, the power system 70 may be an energy storage station or other types of power system, which is not limited here.

[0148] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, thus improving energy efficiency. Furthermore, if all energy storage modules are in a shutdown state, each thermal management fluid circuit can be controlled to form a loop with the thermal management module, controlling the thermal management module to consume energy to heat the energy storage module, thereby ensuring the normal operation of the power system. Based on the above method, it is possible to make the most of the heat generated by the energy storage module when it is in operation to achieve thermal management of the energy storage module, and it is also possible to perform thermal management of each energy storage module based on the thermal management module when all energy storage modules are in a shutdown state. This achieves the goal of maximizing the energy utilization rate of thermal management while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0149] Please refer to Figure 8 , Figure 8 A schematic diagram of the structure of one or more embodiments of the electronic device provided in this application, as shown below. Figure 8 As shown, the electronic device 80 includes a processor 81, a memory 82, and a bus 83.

[0150] The processor 81 and the memory 82 are connected to the bus 83. The memory 82 stores program instructions, and the processor 81 is used to execute the program instructions to implement the thermal management method of the energy storage system in the above embodiment.

[0151] In this embodiment, processor 81 can also be referred to as a CPU (Central Processing Unit). Processor 81 may be an integrated circuit chip with signal processing capabilities. Processor 81 can also be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor, or processor 81 can be any conventional processor.

[0152] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, thus improving energy efficiency. Furthermore, if all energy storage modules are in a shutdown state, each thermal management fluid circuit can be controlled to form a loop with the thermal management module, controlling the thermal management module to consume energy to heat the energy storage module, thereby ensuring the normal operation of the power system. Based on the above method, it is possible to make the most of the heat generated by the energy storage module when it is in operation to achieve thermal management of the energy storage module, and it is also possible to perform thermal management of each energy storage module based on the thermal management module when all energy storage modules are in a shutdown state. This achieves the goal of maximizing the energy utilization rate of thermal management while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0153] Please refer to Figure 9 , Figure 9 Schematic diagrams of one or more embodiments of the computer-readable storage medium provided in this application, as shown below. Figure 9 As shown, a computer-readable storage medium 90 stores program instructions 91 thereon. When the program instructions 91 are executed by a processor (not shown), they implement the thermal management method of the energy storage system in the above embodiments.

[0154] In this embodiment, the computer-readable storage medium 90 may be, but is not limited to, a USB flash drive, SD card, PD optical drive, portable hard drive, high-capacity floppy drive, flash memory, multimedia memory card, storage unit in a server, FPGA, or ASIC, etc.

[0155] In this application, when the temperature of one energy storage module is lower than a preset low-temperature threshold, it can be determined that at least one energy storage module has an excessively low temperature and needs to be heated. If at least one energy storage module is in operation at this time, the thermal management module can be controlled to enter a shutdown state, and the thermal management fluid circuits corresponding to all energy storage modules are connected to form a loop. Based on the heat emitted by the operating energy storage modules, the energy storage modules with temperatures lower than the preset low-temperature threshold are heated through this loop. This achieves heating of the energy storage modules without requiring the thermal management module to consume energy for heating, thus improving energy efficiency. Furthermore, if all energy storage modules are in a shutdown state, each thermal management fluid circuit can be controlled to form a loop with the thermal management module, controlling the thermal management module to consume energy to heat the energy storage module, thereby ensuring the normal operation of the power system. Based on the above method, it is possible to make the most of the heat generated by the energy storage module when it is in operation to achieve thermal management of the energy storage module, and it is also possible to perform thermal management of each energy storage module based on the thermal management module when all energy storage modules are in a shutdown state. This achieves the goal of maximizing the energy utilization rate of thermal management while ensuring the normal operation of the power system, thereby improving the overall efficiency of the power system in which the energy storage system is located.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal management method for an energy storage system, characterized in that, The energy storage system includes multiple energy storage modules and a thermal management module, and the energy storage module has a thermal management liquid circuit. The thermal management method includes: In response to the fact that at least one of the plurality of energy storage modules has a temperature lower than a preset low temperature threshold and at least one of the plurality of energy storage modules is in operation, a thermal management module shutdown command is sent to cause the thermal management module to enter a shutdown state, and a first conduction command is sent to cause all the thermal management liquid circuits to be connected to form a loop. In response to the fact that at least one of the energy storage modules has a temperature lower than the preset low temperature threshold and all of the energy storage modules are in a shutdown state, a thermal management operation command is sent to enable the thermal management module to enter the operation state, and a second conduction command is sent to enable each of the thermal management liquid circuits to be connected to the thermal management module to form a loop. In response to the fact that the temperatures of the plurality of energy storage modules are all greater than or equal to a preset low temperature threshold, a shutdown command for the thermal management module is sent, causing the thermal management module to enter a shutdown state. Wherein, every two adjacent thermal management fluid circuits are connected by a corresponding switching valve, and each energy storage module has a corresponding thermal management fluid circuit; one end of each thermal management fluid circuit is connected to one end of the thermal management module through a first multi-way valve, and the other end of each thermal management fluid circuit is connected to the other end of the thermal management module through a second multi-way valve; Sending the first conduction command to activate all the thermal management fluid circuits and form a loop includes: Send the first conduction command to control the conduction of each of the switching valves, and based on the first multi-way valve and the second multi-way valve, make all the thermal management fluid circuits conduct to form a loop; And / or, Sending the second conduction command, causing each of the thermal management fluid circuits to be connected to the thermal management module to form a loop, includes: Send the second conduction command to control each of the switching valves to disconnect, and based on the first multi-way valve and the second multi-way valve, make each of the thermal management fluid circuits conduct to the thermal management module to form a loop.

2. The thermal management method according to claim 1, characterized in that, The thermal management method further includes: In response to the fact that the temperature of at least one of the plurality of energy storage modules is greater than a preset high temperature threshold, a thermal management module operation command is sent to enable the thermal management module to enter the operation state, and a second conduction command is sent to enable each of the thermal management liquid circuits to be connected to the thermal management module to form a loop. In response to the condition that the temperatures of the plurality of energy storage modules are all greater than or equal to a preset low-temperature threshold, a shutdown command is sent to the thermal management module, causing the thermal management module to enter a shutdown state, including: In response to the fact that the temperatures of the plurality of energy storage modules are all greater than or equal to the preset low temperature threshold and less than or equal to the preset high temperature threshold, a shutdown command for the thermal management module is sent, causing the thermal management module to enter a shutdown state.

3. The thermal management method according to claim 1 or 2, characterized in that, In response to at least one of the plurality of energy storage modules having a temperature lower than a preset low-temperature threshold, and at least one of the plurality of energy storage modules being in operation, a thermal management module shutdown command is sent to cause the thermal management module to enter a shutdown state, and a first conduction command is sent to cause all the thermal management fluid circuits to conduct and form a loop, including: In response to the fact that at least one of the plurality of energy storage modules has a temperature lower than a preset low temperature threshold and at least one of the plurality of energy storage modules is in operation, a shutdown command for the thermal management module is sent to cause the thermal management module to enter a shutdown state, and a first conduction command is sent to cause all the thermal management liquid circuits to be connected to form a loop. In response to a first preset time after which all the thermal management fluid circuits are connected to form a loop, if at least one of the plurality of energy storage modules has a temperature lower than the preset low temperature threshold, the thermal management operation command is sent to cause the thermal management module to enter the operation state, and the second connection command is sent to cause each of the thermal management fluid circuits to be connected to the thermal management module to form a loop.

4. The thermal management method according to claim 1 or 2, characterized in that, In response to at least one of the plurality of energy storage modules having a temperature lower than the preset low-temperature threshold, and all of the plurality of energy storage modules being in a shutdown state, a thermal management operation command is sent to cause the thermal management module to enter an operating state, and a second conduction command is sent to cause each of the thermal management fluid circuits to be connected to the thermal management module to form a loop, including: In response to the condition that at least one of the energy storage modules has a temperature lower than the preset low temperature threshold and all of the energy storage modules are in a shutdown state, the thermal management operation command is sent to enable the thermal management module to enter the operation state, and the second conduction command is sent to sequentially enable each of the thermal management liquid circuits with a temperature lower than the preset low temperature threshold to conduct with the thermal management module to form a loop.

5. The thermal management method according to claim 2, characterized in that, In response to the condition that at least one of the energy storage modules has a temperature greater than a preset high-temperature threshold, a thermal management module operation command is sent to put the thermal management module into operation, and a second conduction command is sent to connect each of the thermal management fluid circuits to the thermal management module to form a loop, including: In response to the fact that at least one of the energy storage modules has a temperature greater than the preset high temperature threshold, the thermal management operation command is sent to enable the thermal management module to enter the operation state, and the second conduction command is sent to sequentially enable each of the thermal management liquid circuits with a temperature greater than the preset high temperature threshold to conduct with the thermal management module to form a loop.

6. The thermal management method according to claim 1, characterized in that, In all the heat management fluid circuits, the other end of the first heat management fluid circuit is connected to one end of another heat management fluid circuit via a corresponding switching valve, and one end of the last heat management fluid circuit is connected to the other end of another heat management fluid circuit via a corresponding switching valve. In addition, in the heat management fluid circuits other than the first and last heat management fluid circuits, the other end of one heat management fluid circuit is connected to one end of another heat management fluid circuit via a corresponding switching valve, so that all the heat management fluid circuits are connected in series through each of the switching valves.

7. The thermal management method according to claim 1, characterized in that, The energy storage system also includes a power module, which provides power to the liquid in the circuit.

8. The thermal management method according to claim 1, characterized in that, The thermal management module includes a heating module and a cooling module; One end of the heating module is one end of the thermal management module, and the other end of the heating module is the other end of the thermal management module. The heating module is used to heat the energy storage module when the temperature is lower than a preset low temperature threshold. One end of the cooling module is one end of the thermal management module, and the other end of the cooling module is the other end of the thermal management module. The cooling module is used to cool the energy storage module when the temperature is higher than a preset high temperature threshold.

9. The thermal management method according to claim 8, characterized in that, One end of the heating module is connected to the first switching end of the three-way valve, one end of the cooling module is connected to the second switching end of the three-way valve, and the first multi-way valve is connected to the common end of the three-way valve. or, The other end of the heating module is connected to the first switching end of the three-way valve, the other end of the cooling module is connected to the second switching end of the three-way valve, and the second multi-way valve is connected to the common end of the three-way valve.

10. An electric power system, characterized in that, The system includes an energy storage system, which includes a battery manager configured to perform the thermal management method as described in any one of claims 1 to 9.

11. An electronic device, characterized in that, include: Memory and processor; The memory is used to store program instructions, and the processor is used to execute the program instructions to implement the method as described in any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program instructions that, when executed by a processor, implement the method as described in any one of claims 1 to 9.

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