Energy-storage thermal management system and energy storage device

Abstract

The embodiments of the present application relate to the technical field of battery energy storage. Provided are an energy-storage thermal management system and an energy storage device. The energy-storage thermal management system comprises a battery cabinet, an electrical cabinet, a liquid cooling unit, an air cooling unit and a control unit, wherein the battery cabinet has at least one first compartment, the first compartment being configured to mount at least one high-voltage box and at least one battery; and the electrical cabinet has at least one second compartment, the liquid cooling unit is configured to abut against at least part of the surface of the battery, and the air cooling unit is in communication with the first compartment and the second compartment in sequence to form a first air cooling loop. When the temperature of the battery is greater than or equal to a first preset temperature, the control unit controls the liquid cooling unit to cool the battery and air passing through the liquid cooling unit; and when the temperature of the high-voltage box is greater than or equal to a second preset temperature, the control unit controls the air cooling unit to perform air cooling on the high-voltage box and the second compartment in sequence. On the basis of the energy-storage thermal management system provided in the embodiments of the present application, the energy utilization efficiency can be improved.

Description

Energy storage thermal management system and energy storage equipment

[0001] This application claims priority to Chinese patent application filed on December 25, 2024, with application number 202411928779.3 and entitled “Energy Storage Thermal Management System and Energy Storage Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery energy storage technology, and in particular to an energy storage thermal management system and energy storage equipment. Background Technology

[0003] With the continuous development of energy storage technology, battery energy storage devices, such as battery containerized energy storage devices, are becoming increasingly widely used. In particular, applications in high-temperature regions place even higher demands on the stable operation of these energy storage devices.

[0004] In battery energy storage devices in related technologies, liquid cooling systems are generally used to dissipate heat from the batteries in the energy storage device, while air cooling systems are used to dissipate heat from the electrical components in the energy storage device.

[0005] However, in the thermal management systems of the aforementioned energy storage devices, the integration level of the liquid cooling system and the air cooling system is low, resulting in low energy efficiency. Summary of the Invention

[0006] Based on this, this application provides an energy storage thermal management system and energy storage equipment to solve the problem that the low integration level of liquid cooling system and air cooling system in the thermal management system of existing battery energy storage equipment affects the energy efficiency.

[0007] In a first aspect, this application provides an energy storage thermal management system, including a battery cabinet, an electrical cabinet, a liquid cooling unit, an air cooling unit, and a control unit;

[0008] The battery cabinet has at least one first compartment, in which at least one high-voltage box and at least one battery are installed;

[0009] The electrical cabinet has at least one second compartment, a liquid cooling unit for contacting at least a portion of the battery surface, and an air cooling unit connected in sequence to the first compartment and the second compartment to form a first air cooling circuit.

[0010] The control unit is configured to, when the battery temperature is greater than or equal to a first preset temperature, control the liquid cooling unit to cool the battery and the air passing through the liquid cooling unit; and to control the air cooling unit to sequentially cool the high-voltage box and the second compartment when the high-voltage box temperature is greater than or equal to a second preset temperature; wherein the second preset temperature is greater than the first preset temperature.

[0011] In one possible implementation, the electrical cabinet also has at least one third compartment, and the air-cooling unit is connected in sequence to the first compartment and the third compartment to form a second air-cooling circuit;

[0012] The control unit is also configured to control the air-cooling unit to sequentially air-cool the high-pressure box and the third compartment when the temperature of the high-pressure box is greater than or equal to the second preset temperature.

[0013] In one possible implementation, a first air control device is provided between the first compartment and the second compartment, and a second air control device is provided between the first compartment and the third compartment;

[0014] The control unit is also configured to, when the temperature in the second compartment is greater than or equal to the third preset temperature and the temperature in the third compartment is less than the fourth preset temperature, control the first air control element to increase the ventilation area and control the second air control element to decrease the ventilation area.

[0015] The control unit is also configured to control the first air control component to reduce the ventilation area and control the second air control component to increase the ventilation area when the temperature in the second compartment is less than the third preset temperature and the temperature in the third compartment is greater than or equal to the fourth preset temperature.

[0016] The control unit is also configured to control both the first and second air control components to adjust the ventilation area to the maximum when the temperature in the second compartment is less than the third preset temperature and the temperature in the third compartment is less than the fourth preset temperature, and when the temperature in the second compartment is greater than or equal to the third preset temperature and the temperature in the third compartment is greater than or equal to the fourth preset temperature.

[0017] In one possible implementation, the maximum ventilation area of ​​the first air control component is greater than the maximum ventilation area of ​​the second air control component.

[0018] In one possible implementation, the air-cooled unit is also connected to the second compartment and forms the first make-up air duct;

[0019] And / or, the air-cooled unit is also connected to the third compartment to form a second make-up air duct.

[0020] In one possible implementation, the air-cooled unit includes an air conditioner and an air guide, with the air conditioner having an air outlet and an air return outlet.

[0021] The air outlets are connected to the first, second, and third compartments respectively via air guides, and the second and third compartments are connected to the return air outlets respectively.

[0022] In one possible implementation, a plurality of first compartments are arranged on the battery cabinet along a first direction, and an air guide has an air duct inside; one side of the air guide is connected to an air conditioner and the air duct is connected to an air outlet, and the other side of the air guide is connected to the battery cabinet and extends into a first compartment.

[0023] The air guide has at least one extension on one side of the first compartment, the extension extends in a first direction, the extension has a main air outlet communicating with the air duct, and the air guide also has at least one secondary air outlet communicating with the air duct, the secondary air outlet being directed toward the high-pressure box.

[0024] The air guide also has a first air supply port and a second air supply port that are connected to the air duct. The first air supply port is connected to the second compartment, and the second air supply port is connected to the third compartment.

[0025] In one possible implementation, a windbreak is provided inside the battery cabinet to separate the high-voltage box and the battery, and a flow gap is left between the windbreak and the inner wall of the first compartment.

[0026] In one possible implementation, the liquid cooling unit includes a liquid cooling unit and at least one cold plate, wherein the liquid cooling unit is connected to the cold plate via piping to form a liquid cooling circuit.

[0027] The liquid cooling unit is electrically connected to the control unit, and the cold plate is used to contact the battery.

[0028] Secondly, this application also provides an energy storage device, including a device body, on which any of the energy storage thermal management systems provided in the first aspect are installed.

[0029] The energy storage thermal management system and energy storage equipment provided in this application include a battery cabinet, an electrical cabinet, a liquid cooling unit, an air cooling unit, and a control unit. The battery cabinet has at least one first compartment, in which at least one high-voltage box and at least one battery are installed. The electrical cabinet has at least one second compartment for housing electrical components. The liquid cooling unit is positioned to contact at least a portion of the battery surface, facilitating battery cooling. The air cooling unit is sequentially connected to the first and second compartments to form a first air cooling circuit. When the battery temperature is greater than or equal to a first preset temperature, the control unit controls the liquid cooling unit to cool the battery and the air passing through it. When the high-voltage box temperature is greater than or equal to a second preset temperature, the control unit controls the air cooling unit to sequentially cool the high-voltage box and the second compartment. The second preset temperature is greater than the first preset temperature. By utilizing the liquid cooling unit to cool the passing air, subsequent air cooling of the electrical components in the second compartment is facilitated, thereby improving energy efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings that can be used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are 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 is a top view of the energy storage thermal management system provided in an embodiment of this application;

[0032] Figure 2 is a schematic diagram of the interior of the battery cabinet in Figure 1;

[0033] Figure 3 is a schematic diagram of the first air control component in Figure 1;

[0034] Figure 4 is a schematic diagram of the second air control component in Figure 1;

[0035] Figure 5 is a schematic diagram of the air conditioner in Figure 1;

[0036] Figure 6 is a schematic diagram of the air guide component in Figure 1.

[0037] Reference numerals: 10: High-voltage box; 20: Battery; 100: Battery cabinet; 110: First compartment; 120: Wind deflector; 130: Flow gap; 200: Electrical cabinet; 210: Second compartment; 211: First air control component; 220: Third compartment; 221: Second air control component; 300: Liquid cooling unit; 310: Liquid cooling unit; 320: Cold plate; 400: Air cooling unit; 401: Air outlet; 402: Return air outlet; 410: Air conditioner; 420: Air guide; 421: Extension section; 4211: Main air outlet; 4201: Secondary air outlet; 4202: First make-up air outlet; 4203: Second make-up air outlet. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of this application as detailed in the appended claims.

[0039] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It is understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] Currently, energy storage equipment is divided into two main parts: batteries and electrical components. The batteries are cooled by a liquid cooling system, but this liquid cooling system cannot cool the high-voltage box that is electrically connected to the batteries. The high-voltage box usually contains circuit breakers, pre-charge relays, fuses, shunts, pre-charge resistors, battery cluster management units (BCUs), switching power supplies, etc. During operation, the high-voltage box temperature is prone to become too high, affecting normal operation.

[0041] However, the electrical components are cooled by a separate air-cooled air conditioner, which is isolated from the battery's liquid cooling system. The thermal management system has a low degree of integration, cannot achieve comprehensive cooling, and has a low energy efficiency.

[0042] To address the aforementioned problems in related technologies, this application provides an energy storage thermal management system and energy storage device. The energy storage thermal management system provided by this application includes a battery cabinet, an electrical cabinet, a liquid cooling unit, an air cooling unit, and a control unit. It features at least one first compartment on the battery cabinet, housing at least one high-voltage box and at least one battery. The electrical cabinet has at least one second compartment for housing electrical components. The liquid cooling unit is positioned to contact at least a portion of the battery surface, facilitating battery cooling. An air cooling unit is sequentially connected to the first and second compartments, forming a first air cooling circuit. When the battery temperature is greater than or equal to a first preset temperature, the control unit controls the liquid cooling unit to cool the battery and the air passing through it. When the high-voltage box temperature is greater than or equal to a second preset temperature, the control unit controls the air cooling unit to sequentially cool the high-voltage box and the second compartment. The second preset temperature is greater than the first preset temperature. Utilizing the liquid cooling unit to cool the passing air facilitates subsequent air cooling of the electrical components in the second compartment, thereby improving energy efficiency.

[0043] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0044] In the first aspect, please refer to Figures 1-6. This application provides an energy storage thermal management system, including a battery cabinet 100, an electrical cabinet 200, a liquid cooling unit 300, an air cooling unit 400, and a control unit.

[0045] The battery cabinet 100 has at least one first compartment 110, in which at least one high-voltage box 10 and at least one battery 20 are installed.

[0046] The electrical cabinet 200 has at least one second compartment 210, a liquid cooling unit 300 for contacting at least a portion of the surface of the battery 20, and an air cooling unit 400 connected in sequence to the first compartment 110 and the second compartment 210 to form a first air cooling circuit.

[0047] The control unit is configured to, when the temperature of the battery 20 is greater than or equal to a first preset temperature, control the liquid cooling unit 300 to cool the battery 20 and the air passing through the liquid cooling unit 300. When the temperature of the high-pressure box 10 is greater than or equal to a second preset temperature, control the air cooling unit 400 to sequentially cool the high-pressure box 10 and the second compartment 210. The second preset temperature is greater than the first preset temperature.

[0048] In this embodiment, the battery cabinet 100 can be a closed frame structure, containing one or more first compartments 110. Each first compartment 110 can house a high-voltage box 10 and one or more batteries 20. The high-voltage box 10 is equipped with a circuit breaker, a pre-charge relay, a fuse, a shunt, a pre-charge resistor, a battery cluster management unit (BCU), a switching power supply, etc., and is electrically connected to the batteries 20. Multiple batteries 20 can form a battery cluster through series, interconnection, or mixed connection. The batteries 20 are generally rectangular in shape.

[0049] In this embodiment, the electrical cabinet 200 can also be a closed frame structure, which has one or more second compartments 210, and the second compartments 210 are used to house electrical control and other components.

[0050] In this embodiment, the liquid cooling unit 300 is used to cool the battery 20. It can be composed of components such as a cold plate. The liquid cooling unit 300 is in contact with at least a portion of the surface of the battery 20 so that the high temperature generated by the battery 20 is transferred to the liquid cooling unit 300.

[0051] In this embodiment, the air-cooled unit 400 is used for environmental cooling. It can be composed of components such as air conditioners. After the air-cooled unit 400 outputs air, it passes through the first chamber 110 and the second chamber 210 in sequence, and then returns to the air-cooled unit 400 to form the first air-cooled circuit, thus completing the air-cooled cycle.

[0052] In this embodiment, the control unit can be electrically connected to the high-voltage box 10, battery 20, liquid cooling unit 300, and air cooling unit 400 to obtain the current temperature information of the high-voltage box 10 and battery 20, and to facilitate the start and stop of the liquid cooling unit 300 and air cooling unit 400.

[0053] Specifically, as shown in Figure 1, when the temperature of the battery 20 is greater than or equal to the first preset temperature, the control unit controls the liquid cooling unit 300 to cool the battery 20 and the air passing through the liquid cooling unit 300. When the temperature of the high-pressure box 10 is greater than or equal to the second preset temperature, the control unit controls the air cooling unit 400 to sequentially cool the high-pressure box 10 and the second chamber 210. The direction of airflow is shown by the arrow in Figure 1, wherein the second preset temperature is greater than the first preset temperature.

[0054] It is worth noting that since the battery 20 can operate at around 25°C, while the operating temperature of the high-voltage box, electrical components, etc. is generally higher than that of the battery 20, the low-temperature air absorbs heat and rises in temperature when passing through the high-voltage box 10 in the first compartment 110. When passing through the heat exchange surface of the liquid cooling unit 300 in the first compartment 110, the liquid cooling unit 300 can cool the air, making full use of the cooling capacity of the liquid cooling unit 300 to cool the environment in the first compartment 110 and the second compartment 210 in the future.

[0055] It should be noted that the first preset temperature and the second preset temperature can be determined according to actual needs, and no specific limitation is made in this embodiment. The temperature of the high-voltage box 10 and the battery 20 can be measured by their own integrated temperature detection components, or by a separately set temperature detection component.

[0056] It is understandable that, compared to the independent cooling systems of the battery and electrical components in related technologies, the energy storage thermal management system in this application embodiment utilizes the liquid cooling unit 300 to cool the passing air, which facilitates subsequent air cooling of the electrical components in the second compartment 210, thereby improving energy efficiency.

[0057] Therefore, the energy storage thermal management system provided in this embodiment includes a battery cabinet 100, an electrical cabinet 200, a liquid cooling unit 300, an air cooling unit 400, and a control unit. The battery cabinet 100 has at least one first compartment 110, in which at least one high-voltage box 10 and at least one battery 20 are installed. The electrical cabinet 200 has at least one second compartment 210 for housing electrical components. The liquid cooling unit 300 is in contact with at least a portion of the surface of the battery 20 to facilitate cooling of the battery 20. The air cooling unit 400 is sequentially connected to the first compartment 110, the first high-voltage box 10, and the control unit. The second compartment 210 is connected to form a first air-cooling circuit. When the temperature of the battery 20 is greater than or equal to the first preset temperature, the control unit controls the liquid cooling unit 300 to cool the battery 20 and the air passing through the liquid cooling unit 300. When the temperature of the high-pressure box 10 is greater than or equal to the second preset temperature, the control unit controls the air-cooling unit 400 to sequentially cool the high-pressure box 10 and the second compartment 210. The second preset temperature is greater than the first preset temperature. By using the liquid cooling unit 300 to cool the passing air, it is convenient to subsequently cool the electrical components in the second compartment 210, thereby improving energy efficiency.

[0058] In one possible design, the electrical cabinet 200 also has at least one third compartment 220, and the air-cooling unit 400 is connected in sequence to the first compartment 110 and the third compartment 220 to form a second air-cooling circuit.

[0059] The control unit is also configured to control the air-cooling unit 400 to sequentially air-cool the high-pressure box 10 and the third compartment 220 when the temperature of the high-pressure box 10 is greater than or equal to the second preset temperature.

[0060] Specifically, as shown in Figure 1, the electrical cabinet 200 may also have one or more third compartments 220. The third compartments 220 can be used to house electrical components such as medium-voltage components. After the air-cooling unit 400 discharges air, it passes through the first compartment 110 and the third compartment 220 in sequence, and then returns to the air-cooling unit 400 to form a second air-cooling circuit, thus completing the air-cooling cycle.

[0061] This configuration allows for simultaneous air cooling of multiple compartments, meeting the air cooling requirements of different types of electrical components.

[0062] Furthermore, in this embodiment, a first air control component 211 is provided between the first compartment 110 and the second compartment 210, and a second air control component 221 is provided between the first compartment 110 and the third compartment 220.

[0063] The control unit is also configured to control the first air control element 211 to increase the ventilation area and control the second air control element 221 to decrease the ventilation area when the temperature in the second compartment 210 is greater than or equal to the third preset temperature and the temperature in the third compartment 220 is less than the fourth preset temperature.

[0064] The control unit is also configured to control the first air control element 211 to reduce the ventilation area and control the second air control element 221 to increase the ventilation area when the temperature in the second compartment 210 is less than the third preset temperature and the temperature in the third compartment 220 is greater than or equal to the fourth preset temperature.

[0065] The control unit is also configured to control the first air control element 211 and the second air control element 221 to adjust the ventilation area to the maximum when the temperature in the second compartment 210 is less than the third preset temperature and the temperature in the third compartment 220 is less than the fourth preset temperature, and when the temperature in the second compartment 210 is greater than or equal to the third preset temperature and the temperature in the third compartment 220 is greater than or equal to the fourth preset temperature.

[0066] Specifically, as shown in Figures 1, 3, and 4, the first air control component 211 and the second air control component 221 are equivalent to valves used to open or close the air duct or adjust the size of the ventilation area. Both can be electric louvers. The first air control component 211 is located between the first compartment 110 and the second compartment 210, and the second air control component 221 is located between the first compartment 110 and the third compartment 220. The first air control component 211 and the second air control component 221 can control the air volume according to which compartment needs more or less cold air.

[0067] In other words, when both the second compartment 210 and the third compartment 220 exceed or do not exceed the set upper temperature limit, both the first and second air-cooling circuits are fully activated. When one of the second compartment 210 and the third compartment 220 exceeds the set upper temperature limit, the air-cooling circuit of the other compartment reduces the airflow to allow more air to enter the compartment that needs cooling more. This enables rapid cooling of compartments that urgently require cooling, thereby improving reliability.

[0068] It can be noted that the third and fourth preset temperatures can be determined according to actual needs, and are not specifically limited in this embodiment. In addition, the second compartment 210 and the third compartment 220 can measure the temperature through temperature detection components. The temperature detection components are electrically connected to the control unit. The specific model, quantity, and location of the temperature detection components can be determined according to actual needs, and are not specifically limited in this embodiment.

[0069] Furthermore, in this embodiment, the maximum ventilation area of ​​the first air control component 211 is greater than the maximum ventilation area of ​​the second air control component 221.

[0070] Since the second compartment 210 houses control electrical components, which are more sensitive to high temperatures and require more cooling, while the third compartment 220 houses medium-voltage electrical components, which are less sensitive to high temperatures and require relatively less cooling, the system is designed to allow more cooling airflow into the second compartment 210. The specific maximum ventilation area for both compartments can be determined based on actual needs; this embodiment does not impose a specific limitation.

[0071] In some embodiments, the air-cooled unit 400 is also connected to the second compartment 210 to form a first make-up air duct.

[0072] And / or, the air-cooled unit 400 is also connected to the third compartment 220 to form a second make-up air duct.

[0073] That is, part of the exhaust air from the air-cooled unit 400 passes directly through the second compartment 210 and returns to the return air of the air-cooled unit 400. Alternatively, part of the exhaust air from the air-cooled unit 400 passes directly through the third compartment 220 and returns to the return air of the air-cooled unit 400.

[0074] In this way, while the first compartment 110 is being air-cooled, a portion of the cool air is also being distributed to the second compartment 210 and the third compartment 220 to prevent the electrical components in the second compartment 210 and the third compartment 220 from overheating. The airflow volume in the first and second make-up air ducts can be determined according to actual needs, and is not specifically limited in this embodiment.

[0075] Furthermore, in this embodiment, the air-cooled unit 400 includes an air conditioner 410 and an air guide 420, and the air conditioner 410 has an air outlet 401 and an air return outlet 402.

[0076] The air outlet 401 is connected to the first compartment 110, the second compartment 210 and the third compartment 220 respectively through the air guide 420. The second compartment 210 and the third compartment 220 are connected to the return air outlet 402 respectively.

[0077] Specifically, as shown in Figures 5 and 6, the air conditioner 410 can be an integrated unit or it can include an indoor unit and an outdoor unit. The air outlet 401 on the air conditioner 410 is the cold air outlet, and the air guide 420 is equivalent to a multi-branch pipe. After the cold air from the air outlet 401 enters the air guide 420, it is then supplied to the first compartment 110, the second compartment 210, and the third compartment 220 respectively, which plays the role of distributing air.

[0078] Furthermore, in this embodiment, a plurality of first compartments 110 are arranged on the battery cabinet 100 along a first direction, and the air guide 420 has an air duct. One side of the air guide 420 is connected to the air conditioner 410, and the air duct is connected to the air outlet 401. The other side of the air guide 420 is connected to the battery cabinet 100 and extends into one of the first compartments 110.

[0079] The air guide 420 has at least one extension 421 on one side of the first compartment 110. The extension 421 extends in a first direction and has a main air outlet 4211 that communicates with the air duct. The air guide 420 also has at least one secondary air outlet 4201 that communicates with the air duct and is directed toward the high-pressure box 10.

[0080] The air guide 420 also has a first air supply port 4202 and a second air supply port 4203 that are connected to the air duct. The first air supply port 4202 is connected to the second compartment 210, and the second air supply port 4203 is connected to the third compartment 220.

[0081] Specifically, as shown in Figure 1, multiple first compartments 110 are arranged side by side along the horizontal direction on the battery cabinet 100. Each first compartment 110 is equipped with a high-voltage box 10 and multiple batteries 20.

[0082] As shown in Figure 6, the air guide 420 can be shell-shaped with a hollow structure inside. One end of it is connected to the air outlet 401, and the other end is inserted into the battery cabinet 100 into a first compartment 110. The air guide 420 has at least one extension 421 on one side in the first compartment 110. The extension 421 has a main air outlet 4211, such as an air guide branch pipe, for distributing cold air to each first compartment 110.

[0083] Furthermore, the air guide 420 also has a secondary air outlet 4201, which faces the adjacent high-pressure box 10. Additionally, the air guide 420 also has a first air supply outlet 4202 and a second air supply outlet 4203. The first air supply outlet 4202 directly connects to the second compartment 210, and the second air supply outlet 4203 directly connects to the third compartment 220, for air supply. The specific size and location of each of the above air outlets can be determined according to actual needs, and are not specifically limited in this embodiment.

[0084] Furthermore, in this embodiment, a windbreak 120 is provided inside the battery cabinet 100. The windbreak 120 is used to separate the high-voltage box 10 and the battery 20. A flow gap 130 is left between the windbreak 120 and the inner wall of the first compartment 110.

[0085] Specifically, as shown in Figures 1 and 2, the wind deflector 120 is used to block the wind. It can act as a partition, preventing cold air from blowing directly onto the battery 20. Instead, the wind deflector 120 first cools the high-voltage box 10 sufficiently before entering the gap between the battery 20 and the inner wall of the first compartment 110 through the flow gap 130 for sufficient heat exchange. The specific size and position of the flow gap 130 can be determined according to actual needs, and this embodiment does not impose too many restrictions.

[0086] Furthermore, in this embodiment, the liquid cooling unit 300 includes a liquid cooling unit 310 and at least one cold plate 320, with the liquid cooling unit 310 and the cold plate 320 connected by pipes to form a liquid cooling circuit.

[0087] The liquid cooling unit 310 is electrically connected to the control unit, and the cold plate 320 is used to contact the battery 20.

[0088] Specifically, the cold plate 320 can be plate-shaped, shell-shaped, or other structures, with flow channels inside. The cold plate 320 can abut against the large surface of the battery 20, and a thermal conductive agent can be filled between them. One cold plate 320 is connected to one battery, and there is a gap between adjacent batteries 20.

[0089] The liquid cooling unit 310 is connected to the cold plate 320 through pipes to form a liquid cooling circuit. The heat generated by the battery 20 is carried away from the cold plate 320 through the circulation of refrigerant, and the heat is released to the external environment through the condenser, thereby achieving the purpose of cooling.

[0090] The liquid cooling unit 310 is electrically connected to the control unit so that the control unit can control the start and stop of the liquid cooling unit 310 when possible. The shape and specifications of the cold plate 320 can be determined according to the actual needs of the battery 20. Correspondingly, the liquid cooling unit 310 can be determined according to the actual number of cold plates 320. In this embodiment, no specific limitation is made.

[0091] Secondly, embodiments of this application also provide an energy storage device, including a device body, on which an energy storage management system provided in any of the above embodiments is disposed.

[0092] The energy storage thermal management system has been described in detail in the above embodiments and will not be repeated here.

[0093] Specifically, the main body of the equipment can be a container-type structure or a modular structure that integrates the battery cabinet 100, electrical cabinet 200, liquid cooling unit 300, air cooling unit 400 and control unit into one unit, which facilitates overall hoisting operations, etc. The battery cabinet 100, electrical cabinet 200, liquid cooling unit 300, air cooling unit 400 and control unit are temperature controlled by the above-mentioned energy storage management system to ensure the stable operation of the energy storage equipment.

[0094] It is understood that the energy storage device provided in this application embodiment, by configuring the above-mentioned energy storage thermal management system, includes a battery cabinet 100, an electrical cabinet 200, a liquid cooling unit 300, an air cooling unit 400, and a control unit. The battery cabinet 100 is provided with at least one first compartment 110, in which at least one high-voltage box 10 and at least one battery 20 are installed. The electrical cabinet 200 is provided with at least one second compartment 210 for housing electrical components. The liquid cooling unit 300 is positioned to contact at least a portion of the surface of the battery 20, facilitating cooling of the battery 20. The air cooling unit 400... The system is connected to the first compartment 110 and the second compartment 210 in sequence to form a first air-cooling circuit. When the temperature of the battery 20 is greater than or equal to the first preset temperature, the control unit controls the liquid cooling unit 300 to cool the battery 20 and the air passing through the liquid cooling unit 300. When the temperature of the high-pressure box 10 is greater than or equal to the second preset temperature, the control unit controls the air-cooling unit 400 to cool the high-pressure box 10 and the second compartment 210 in sequence. The second preset temperature is greater than the first preset temperature. By using the liquid cooling unit 300 to cool the passing air, it is convenient to subsequently cool the electrical components in the second compartment 210, thereby improving the energy efficiency.

[0095] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0096] It is understood that this application is not limited to the precise structures described above and shown in the appendix, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An energy storage thermal management system, comprising a battery cabinet (100), an electrical cabinet (200), a liquid cooling unit (300), an air cooling unit (400), and a control unit; The battery cabinet (100) has at least one first compartment (110) for installing at least one high-voltage box (10) and at least one battery (20); The electrical cabinet (200) has at least one second compartment (210), the liquid cooling unit (300) is used to abut against at least a portion of the surface of the battery (20), and the air cooling unit (400) is connected to the first compartment (110) and the second compartment (210) in sequence to form a first air cooling circuit; The control unit is configured to, when the temperature of the battery (20) is greater than or equal to a first preset temperature, control the liquid cooling unit (300) to cool the battery (20) and the air passing through the liquid cooling unit (300); and to control the air cooling unit (400) to sequentially cool the high-pressure box (10) and the second compartment (210) when the temperature of the high-pressure box (10) is greater than or equal to a second preset temperature; wherein, The second preset temperature is greater than the first preset temperature.

2. The energy storage thermal management system according to claim 1, wherein, The electrical cabinet (200) also has at least one third compartment (220), and the air-cooling unit (400) is connected in sequence to the first compartment (110) and the third compartment (220) to form a second air-cooling circuit; The control unit is also configured to control the air-cooling unit (400) to sequentially air-cool the high-pressure box (10) and the third compartment (220) when the temperature of the high-pressure box (10) is greater than or equal to the second preset temperature.

3. The energy storage thermal management system according to claim 2, wherein, A first air control component (211) is provided between the first compartment (110) and the second compartment (210), and a second air control component (221) is provided between the first compartment (110) and the third compartment (220); The control unit is further configured to, when the temperature in the second compartment (210) is greater than or equal to a third preset temperature and the temperature in the third compartment (220) is less than a fourth preset temperature, control the first air control element (211) to increase the ventilation area and control the second air control element (221) to decrease the ventilation area. The control unit is further configured to control the first air control element (211) to reduce the ventilation area and control the second air control element (221) to increase the ventilation area when the temperature in the second compartment (210) is less than the third preset temperature and the temperature in the third compartment (220) is greater than or equal to the fourth preset temperature. The control unit is further configured to, when the temperature in the second compartment (210) is less than the third preset temperature and the temperature in the third compartment (220) is less than the fourth preset temperature, and when the temperature in the second compartment (210) is greater than or equal to the third preset temperature and the temperature in the third compartment (220) is greater than or equal to the fourth preset temperature, control both the first air control element (211) and the second air control element (221) to adjust the ventilation area to the maximum.

4. The energy storage thermal management system according to claim 3, wherein, The maximum ventilation area of ​​the first air control component (211) is greater than the maximum ventilation area of ​​the second air control component (221).

5. The energy storage thermal management system according to claim 2, wherein, The air-cooling unit (400) is also connected to the second compartment (210) to form a first make-up air duct; And / or, the air-cooling unit (400) is also connected to the third compartment (220) to form a second make-up air duct.

6. The energy storage thermal management system of claim 5, wherein, The air-cooled unit (400) includes an air conditioner (410) and an air guide (420), wherein the air conditioner (410) has an air outlet (401) and an air return outlet (402); The air outlet (401) is connected to the first compartment (110), the second compartment (210), and the third compartment (220) respectively through the air guide (420), and the second compartment (210) and the third compartment (220) are connected to the return air outlet (402) respectively.

7. The energy storage thermal management system according to claim 6, wherein, The battery cabinet (100) has a plurality of first compartments (110) arranged along a first direction, and the air guide (420) has an air duct inside; one side of the air guide (420) is connected to the air conditioner (410), and the air duct is connected to the air outlet (401); the other side of the air guide (420) is connected to the battery cabinet (100) and extends into one of the first compartments (110); The air guide (420) has at least one extension (421) on one side located in the first compartment (110), the extension (421) extends in the first direction, the extension (421) has a main air outlet (4211) communicating with the air duct, the air guide (420) also has at least one secondary air outlet (4201) communicating with the air duct, the secondary air outlet (4201) is used to face the high-pressure box (10); The air guide (420) also has a first air supply port (4202) and a second air supply port (4203) that are connected to the air duct. The first air supply port (4202) is connected to the second compartment (210), and the second air supply port (4203) is connected to the third compartment (220).

8. The energy storage thermal management system according to claim 7, wherein, The battery cabinet (100) is provided with a wind deflector (120), which is used to separate the high voltage box (10) and the battery (20). A flow gap (130) is left between the wind deflector (120) and the inner wall of the first compartment (110).

9. The energy storage thermal management system according to any one of claims 1 to 8, wherein, The liquid cooling unit (300) includes a liquid cooling unit (310) and at least one cold plate (320), wherein the liquid cooling unit (310) is connected to the cold plate (320) by pipes to form a liquid cooling circuit; The liquid cooling unit (310) is electrically connected to the control unit, and the cold plate (320) is used to abut against the battery (20).

10. An energy storage device, comprising a device body, wherein the device body is provided with an energy storage thermal management system as described in any one of claims 1 to 9.

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