Cabinet and energy storage system
By designing a cabinet with liquid cooling plates and an airflow circulation system in the energy storage device, the heat dissipation problem of the energy storage device under different temperature environments is solved, and efficient temperature regulation and equipment performance maintenance are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-27
AI Technical Summary
Energy storage devices may not dissipate heat in time under different ambient temperatures, leading to a decline in equipment performance or safety accidents. Performance is also reduced in low-temperature environments.
Design a cabinet containing a sealable enclosure with multiple battery packs and a power conversion system. Employ a liquid cooling plate and an airflow circulation system. Utilize the liquid cooling plate and an integrated fan for temperature control. Temperature regulation is achieved through the combination of airflow circulation and the liquid cooling plate.
It enables efficient thermal management of energy storage systems under different ambient temperatures, ensuring that the equipment maintains an appropriate temperature under high load or low temperature conditions, and avoiding performance degradation or safety risks.
Smart Images
Figure CN224053200U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of energy storage, in particular to a cabinet and an energy storage system. BACKGROUND
[0002] With the development of new energy industry, energy storage system has become an important part of stable operation of power system. Electrochemical energy storage technology is widely used in power grid peak shaving, emergency backup power supply and distributed power generation due to its high energy density and fast response speed. Since the energy storage equipment (such as battery pack) and power conversion system (PCS) generate a large amount of heat when working under high load, if the heat is not dissipated in time, it will lead to performance degradation of the equipment and even safety accidents; and the performance of the energy storage equipment will also be greatly reduced under low temperature, so it is necessary to maintain the working environment of the energy storage equipment and PCS at an appropriate temperature as much as possible.
[0003] Therefore, how to provide thermal management for energy storage equipment under different environmental temperatures has become a technical problem to be solved by the present application. CONTENT OF THE UTILITY MODEL
[0004] The present application provides a cabinet to overcome the above technical problems.
[0005] In a first aspect, the present application provides a cabinet, which comprises a sealable cabin body for accommodating a plurality of battery packs and a power conversion system, wherein the battery packs are installed with liquid cooling plates, and the plurality of battery packs and the power conversion system are arranged in a vertical direction to form a flow path of air flow.
[0006] Preferably, the turning part of the inner wall of the cabin body comprises an arc-shaped inner wall for guiding air flow.
[0007] Preferably, the bottom of the liquid cooling plate is provided with a cold plate flow channel for air flow.
[0008] Preferably, the bottom of the cold plate flow channel is open.
[0009] Preferably, the cold plate flow channel has a plurality of partition strips arranged at intervals to divide the cold plate flow channel into a plurality of sub-flow channels extending side by side.
[0010] Preferably, the partition strips of each liquid cooling plate gradually decrease in thickness in a direction away from the power conversion system.
[0011] Preferably, at least one auxiliary fan is arranged in the cabinet.
[0012] In a second aspect, the present application provides an energy storage system comprising the cabinet as described above.
[0013] Through the technical scheme of the application, the air flow can at least pass through the fan of the PCS to make the air in the cabin body circulate, and the air can be heated by the PCS and cooled by the liquid cooling plate in the process of circulating flow, so that the temperature in the cabin body can be controlled in an appropriate range, and efficient thermal management of the energy storage system under different ambient temperatures is realized. BRIEF DESCRIPTION OF DRAWINGS
[0014] The drawings incorporated in the specification and forming a part thereof illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.
[0016] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.
[0017] Figure 1 A schematic diagram of an energy storage system is provided for an embodiment of the present application;
[0018] Figure 2 A schematic diagram of an energy storage system is provided for another embodiment of the present application;
[0019] Figure 3 A schematic diagram of a liquid cooling plate is provided for an embodiment of the present application;
[0020] Figure 4 A schematic diagram of a liquid cooling plate is provided for an embodiment of the present application; Figure 3 An enlarged schematic diagram of the bottom of the liquid cooling plate of
[0021] Figure 5 An air flow schematic diagram of the energy storage system shown in Figure 1 An air flow schematic diagram of the energy storage system shown in
[0022] Figure 6 An air flow schematic diagram of the energy storage system shown in Figure 2 An air flow schematic diagram of the energy storage system shown in
[0023] BRIEF DESCRIPTION OF DRAWINGS
[0024] 1, cabinet; 2, battery pack; 3, power conversion system; 4, liquid cooling machine; 5, partition plate; 6, cabinet door; 7, liquid cooling plate; 8, refrigerant flow channel; A: hot air flow; B: cold air flow. DETAILED DESCRIPTION
[0025] In order to more clearly illustrate the specific embodiments, technical solutions and advantages in the present application, the technical solutions will be described in detail in conjunction with the relevant drawings. It should be pointed out that the embodiments mentioned in the text only represent part of the cases, not all. Based on these cases, any other embodiments that can be deduced by any person skilled in the art without innovative work should also be considered as the protection object of the present application.
[0026] Numerous different embodiments or examples are disclosed herein to demonstrate the diverse structure of the present application. In describing these specific examples, we strive to simplify the expression, but these examples are not intended to limit the scope of application of the present application. At the same time, in order to ensure the consistency and clarity of the description, the same reference numbers and / or letters may be repeatedly used in different examples. Such repetition does not imply a direct relationship between different examples or settings.
[0027] In the description, we may use some terms to describe the relative position of space, such as "inside", "outside", "inboard", "outboard", "under", "below", "above", "over", "front", "back", etc. to describe the relative position or movement state between one component or feature and another component or feature. These terms are not only applicable to the direction shown in the drawings, but also applicable to different directions that may occur during the use or operation of the device. For example, if the device in the drawing is turned over, the posture is adjusted or the movement state is changed, the corresponding direction indication will also change accordingly. For example, the component originally described as "below other components or features" may become "above other components or features". Therefore, expressions such as "below" can actually cover both the above and below cases. The device can be oriented in different ways (e.g. rotated by 90 degrees or other directions), and the spatial relative relationship description used in the text should also be interpreted accordingly.
[0028] According to one aspect of the present application, a cabinet is provided, the cabinet comprising a sealable cabin body for accommodating a battery pack and a power conversion system, each of the plurality of battery packs being mounted with a liquid cooling plate, wherein the plurality of battery packs and the power conversion system are arranged in a vertical direction to form a flow path of air flow.
[0029] In the technical solution of the present application, as shown in Figure 1 or 2, the cabin body can have a plurality of battery packs (PACK) 2, and the plurality of PACKs can be arranged in a vertical direction to enable a cabinet to accommodate a plurality of PACKs. The power conversion system (PCS) 3 is provided with a cooling fan. And the plurality of PACKs and PCS can be arranged in a proper form, for example Figure 1As shown, the PCS can be located above the rack, with multiple PACKs located below the PCS, or it can also be as follows: Figure 2 As shown, multiple PACKs can be located above the rack, with PCS below the PACKs, and other arrangements are not limited here. The liquid cooling plate 7, as a cooling element, can be placed in a suitable location adjacent to the PACK, such as at the bottom, side, or top of the PACK, as long as it is close enough to cool the PACK. Each liquid cooling plate 7 can be connected to the liquid chiller 4 via water inlet and outlet pipes. The coolant can be water, ethylene glycol aqueous solution, propylene glycol aqueous solution, silicone oil, etc., without limitation.
[0030] The cabinet may have a door 6 that can be opened and closed to isolate the internal compartments from the outside in order to minimize the impact of the external environment on the equipment inside the compartments.
[0031] Through this application, when the temperature inside the cabinet is too high during actual operation, the liquid chiller 4 can be activated to cool the PACK via the liquid cooling plate 7. The PACK can be directly cooled. Furthermore, the fan built into the PCS creates airflow within the compartment. When the hot air flows to the liquid cooling plate, it is cooled into cold air, which then flows back into the PCS for further cooling. This cycle continues to maintain the temperature within the compartment within an appropriate range and ensures uniform temperature distribution. In low-temperature environments such as winter, the liquid chiller 4 is not activated. Instead, the heat generated by the PCS during operation heats the air, which is then circulated back to the PACK to heat it.
[0032] Normally, the inner walls of a cabinet are all right angles, which result in greater resistance to airflow. Therefore, according to a preferred embodiment of this application, the turning point of the inner wall of the cabinet includes an arc-shaped inner wall for guiding airflow.
[0033] Through this application, for example Figure 5 As shown in Figure 6, the bend in the inner wall of the chamber near the PCS outlet can be designed with a curved inner wall, effectively improving airflow characteristics. It should be understood that curved airflow guiding structures can also be installed at other locations on the inner wall of the chamber. Compared to traditional straight inner wall designs, curved inner walls reduce eddies and obstruction effects on the airflow within the chamber, thereby reducing airflow losses. Furthermore, curved inner walls can guide hot air to distribute evenly within the chamber, preventing overheating caused by heat accumulation in localized areas. This design is particularly suitable for the thermal management needs of the PCS during high-load operation.
[0034] In order to achieve more effective cooling when air flows to the liquid cooling plate of the PACK, according to a preferred embodiment, such as Figure 3As shown, the bottom of the liquid cooling plate is provided with a cold plate flow channel for air flow. In the technical solution of the present application, the cold plate flow channel can be close to the bottom of the liquid cooling plate 7, so that the hot air is rapidly cooled by the liquid cooling plate when passing through the cold plate flow channel.
[0035] In order to improve the speed of air flow, according to a preferred embodiment, as shown in Figure 3 and 4 As shown, the bottom of the cold plate flow channel is open to form fins, so that the air can be effectively cooled when passing through the cold plate flow channel and the probability of turbulence is reduced, and the air flow speed is improved.
[0036] In order to improve the cooling efficiency, according to a preferred embodiment, the cold plate flow channel has a plurality of spaced apart partition strips to divide the cold plate flow channel into a plurality of side-by-side extending sub-flow channels.
[0037] In the technical solution of the present application, the partition strip can adopt a suitable form, for example, the partition strip can extend in a straight line, or the partition strip can also adopt a curved design. On the one hand, the partition strip helps to guide the air to pass through the surface of the liquid cooling plate in a specific path, thereby improving the heat exchange efficiency between the air and the liquid cooling plate. On the other hand, the side-by-side design of the sub-flow channel can reduce the air flow resistance in the flow channel, so that the air flow is more uniform. Preferably, in order to improve the air flow in the cold plate flow channel, the partition strip is curved. The curved partition strip can increase the path of the air in the flow channel, so that the air flow can contact the surface of the liquid cooling plate for a longer time during the flow process, thereby improving the cooling effect.
[0038] In order to make the air flow as uniform as possible through each liquid cooling plate and avoid the weakening of air flow due to the distance from the PCS, according to a preferred embodiment, the thickness of the partition strip of each liquid cooling plate gradually decreases in the direction away from the power conversion system.
[0039] In the technical solution of the present application, the thickness of the partition strip of the liquid cooling plate close to the PCS is larger, so that the sub-flow channel of the liquid cooling plate is narrower and the air flow is reduced. The thickness of the partition strip of the liquid cooling plate far away from the PCS is smaller, so that the sub-flow channel of the liquid cooling plate is wider and the air flow is increased. Through the technical solution, when the fan of the PCS guides the air flow to the PACK, the air is more likely to flow to the liquid cooling plate far away from the PCS, thereby promoting the uniform flow of air in the cabin.
[0040] In order to further avoid the slow air flow in the liquid cooling flow channel far away from the PCS and improve the circulation efficiency of the air in the cabin, according to a preferred embodiment, at least one auxiliary fan is arranged in the cabinet.
[0041] In the technical solution of the present application, the auxiliary fan can be arranged at a proper position, for example, can be arranged at the end of each PACK, or can be arranged at the end of the PACK farthest from the PCS, etc., which is not limited herein, as long as the air flow efficiency can be improved.
[0042] The auxiliary fan can form a cooperative working mechanism with the fan of the PCS, and by increasing the flow rate and circulation efficiency of the air flow, the exchange process of the hot air and the cold air in the cabinet can be accelerated. In high load operation, the auxiliary fan can quickly discharge the heat in the high temperature area, effectively reducing the temperature of the cabin body; and in a low temperature environment, the auxiliary fan can also help the hot air to circulate to the PACK, so that the PACK can be heated more evenly.
[0043] According to another aspect of the present application, a storage energy system is also provided, which comprises the cabinet as described above.
[0044] According to the present application, since the storage energy cabinet is a closed structure, there is only an air duct for air inlet and air outlet inside the cabin body, and the heat exchange inside the cabin body is realized. In the case of refrigeration, the PACK is temperature-regulated by the liquid cooling unit, the temperature of the liquid cooling plate 7 is the lowest, the liquid cooling plate cools the PACK by heat conduction, and the area of the liquid cooling plate is relatively large, and the liquid cooling plate can also exchange heat with the air near it, then the air with lower temperature near the liquid cooling plate is introduced to other positions by the fan of the PCS, so that the air flow inside the cabin body can be realized, thereby indirectly regulating the temperature of the PCS. In the case of low ambient temperature, the liquid cooling machine does not work, and the hot air with high temperature generated by the PCS can be transmitted to the PACK to heat it, thereby realizing efficient thermal management of the storage energy system under different ambient temperatures
[0045] It should be noted that the terms used herein are for the purpose of describing specific embodiments and are not intended to limit the scope of the utility model. Unless otherwise specified in the context herein, the singular forms mentioned herein, such as "a", "an" and "the", can also include plural meanings. In addition, the terms "include", "contain", "have" and "possess" are inclusive, meaning that the presence of the features, steps, operations, components and / or parts they refer to does not exclude the possibility of other features, steps, operations, components, parts and combinations thereof. The methods, processes and operations described herein do not mean that they must be executed in a specific order, unless there is an explicit order requirement. At the same time, it should be understood that there can be other or alternative steps.
[0046] Although the terms "first", "second", "third", and the like can be used herein to describe various elements, components, regions, layers and / or sections, these terms are not intended to convey an importance or a spatial or chronological sequence of the disclosed embodiments. Thus, a "first" element, component, region, layer or section discussed herein can later be referred to as a "second" element, component, region, layer or section without departing from the teachings of the present embodiments.
[0047] The foregoing merely illustrates the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The scope of the application should be determined with reference to the claims.
Claims
1. A cabinet, characterized in that, The cabinet comprises a sealable cabin body for accommodating a plurality of battery packs and a power conversion system, each of the plurality of battery packs is mounted with a liquid cooling plate, wherein the plurality of battery packs and the power conversion system are arranged in a vertical direction to form a flow path of air flow.
2. The cabinet of claim 1, wherein, The turning part of the cabin body inner wall comprises an arc-shaped inner wall for guiding air flow.
3. The cabinet of claim 1, wherein, The bottom of the liquid cooling plate is provided with a cold plate flow channel for air flow.
4. The cabinet of claim 3, wherein, The bottom of the cold plate flow channel is open.
5. The cabinet of claim 4, wherein, The cold plate flow channel has a plurality of spaced-apart partition strips to separate the cold plate flow channel into a plurality of side-by-side extending sub-flow channels.
6. The cabinet of claim 5, wherein, The thickness of the partition strip of each liquid cooling plate gradually decreases in a direction away from the power conversion system.
7. The cabinet of claim 1, wherein, At least one auxiliary fan is arranged in the cabinet.
8. An energy storage system characterized by, A cabinet as claimed in any one of claims 1 to 7.