An alternating current coupling energy storage system integrated with a heat dissipation structure
Patent Information
- Application Number
- CN202522229880.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-22
AI Technical Summary
[0002]当前，户用及小型商用交流耦合储能系统在高负载运行时散热能力不足的问题尤为突出
[0007]本实施例中，通过将逆变器模块设于主散热器内并与之热耦合，同时将离心风机设置于主散热器中央区域且位于逆变器模块上方，构建了一个紧凑型热管理架构。这种架构极大地缩短了热量的传递路径，降低了热阻，确保了逆变器模块在高负载运行时的热量能够被快速、高效地导出和散发，从而避免了因过热导致的性能降额，显著提升了系统的功率稳定性和长期运行可靠性。通过在主散热器底部与电池模块顶部设置第一即插即用接口，使得系统在安装时能同时建立机械连接以及电力和通信连接，而无需外部电缆。消除了复杂的现场布线工作，将安装时间与人工成本降至最低，并从根本上避免了因线缆连接松动或错误导致的故障，实现了真正的“一键式”快速部署与模块化扩容。
Smart Images
Figure CN224804649U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of AC-coupled energy storage, specifically to an AC-coupled energy storage system with an integrated heat dissipation structure. Background Technology
[0002] Currently, the problem of insufficient heat dissipation capacity in residential and small-scale commercial AC-coupled energy storage systems is particularly prominent when operating under high load. Common heat dissipation solutions often have inadequate airflow design, resulting in uneven airflow distribution and the formation of localized hot spots. This causes core components such as inverter modules to trigger derating protection due to excessive temperature rise, making it difficult to maintain the system's peak output power.
[0003] In terms of structural design and installation and maintenance, the internal electrical connections of the system are complex, and the wiring between the inverter module and the battery module needs to be constructed on-site. This not only reduces installation efficiency, but also introduces potential connection failure points.
[0004] Therefore, there is an urgent need for an energy storage system that can solve the heat dissipation problem of the inverter module and the connection problem between the inverter module and the battery module. Utility Model Content
[0005] In view of the above problems, this application provides an AC-coupled energy storage system with an integrated heat dissipation structure, which overcomes or at least partially solves the heat dissipation problem of the inverter module and the connection problem between the inverter module and the battery module.
[0006] This application provides an AC-coupled energy storage system with an integrated heat dissipation structure, including a battery module, an inverter module, and a main heat sink. The inverter module is located inside the main heat sink and is thermally coupled to it. The main heat sink includes a centrifugal fan, which is located in the central area of the main heat sink and above the inverter module. An LED light strip and multiple interfaces are provided on the outer periphery of the main heat sink, and the LED light strip and interfaces are electrically connected to the inverter module. The bottom of the main heat sink is connected to the top of the battery module through a first plug-and-play interface. When the main heat sink is installed on the battery module, it can simultaneously establish mechanical, electrical, and communication connections without the need for external cables.
[0007] In this embodiment, a compact thermal management architecture is constructed by placing the inverter module inside and thermally coupling it to the main heat sink, while positioning the centrifugal fan in the central area of the main heat sink above the inverter module. This architecture significantly shortens the heat transfer path, reduces thermal resistance, and ensures that the heat generated by the inverter module during high-load operation can be quickly and efficiently dissipated, thereby avoiding performance derating due to overheating and significantly improving the system's power stability and long-term operational reliability. By setting the first plug-and-play interface at the bottom of the main heat sink and the top of the battery module, the system can simultaneously establish mechanical, electrical, and communication connections during installation without the need for external cables. This eliminates complex on-site wiring work, minimizes installation time and labor costs, and fundamentally avoids failures caused by loose or incorrect cable connections, achieving true "one-click" rapid deployment and modular expansion.
[0008] By integrating LED light strips and multiple interfaces on the outer perimeter of the main heat sink and electrically connecting them to the inverter module, the system can clearly and intuitively display its operating mode (such as grid-connected operation mode, off-grid backup (UPS) mode, battery charging mode, and battery discharging mode) and fault information through rich visual signals (such as LED colors and flashing patterns), greatly facilitating real-time monitoring and fault diagnosis for users. At the same time, standardized interfaces provide convenience for subsequent connection of external devices, enhancing the system's functional scalability.
[0009] In one alternative embodiment, the main heat sink further includes one or more secondary heat sinks, which are mounted on the main heat sink and used to dissipate heat from the inverter module.
[0010] In one alternative embodiment, the main radiator further includes multiple curved heat dissipation fins arranged around the centrifugal fan. The multiple curved heat dissipation fins together form an annular airflow channel to guide the airflow radially through the curved heat dissipation fins and discharge it from the heat dissipation fins of the secondary radiator.
[0011] In one alternative approach, the profile shape of each curved heat dissipation fin follows a logarithmic spiral.
[0012] In one alternative, the top of the main radiator is equipped with louvers, which serve as the air inlet for the centrifugal fan.
[0013] In one alternative approach, the battery module includes multiple battery cells stacked along the direction of gravity, with adjacent stacked battery cells connected via a second plug-and-play interface.
[0014] In one alternative embodiment, the first plug-and-play interface includes a first groove, a first protrusion, a first bolt, and a first threaded hole. The first groove is located at the bottom of the main heat sink, and the first protrusion is located at the top of the battery module; the first groove and the first protrusion mate with each other. The first threaded hole communicates with the first groove, and the first protrusion has a second threaded hole. After the first groove and the first protrusion mate, the first threaded hole and the second threaded hole communicate with each other, and the first bolt passes through the first threaded hole and is fixed to the second threaded hole.
[0015] In one alternative embodiment, the second plug-and-play interface includes a second groove, a second protrusion, a second bolt, and a third threaded hole. The second groove is located at the bottom of the first battery unit, and the second protrusion is located at the top of the second battery unit. The second groove and the second protrusion mate with each other, wherein the first battery unit is the upper battery unit among two adjacent battery units, and the second battery unit is the lower battery unit among two adjacent battery units. The third threaded hole communicates with the second groove, and the second protrusion has a fourth threaded hole. After the second groove and the second protrusion mate, the third threaded hole and the fourth threaded hole communicate with each other, and the second bolt passes through the third threaded hole and is fixed to the fourth threaded hole.
[0016] In an alternative embodiment, the system also includes a base that is connected to the bottom of the battery module.
[0017] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This application provides an AC-coupled energy storage system with an integrated heat dissipation structure in some embodiments.
[0020] Figure 2 A schematic diagram of airflow direction from a first-view perspective, provided for some embodiments of this application.
[0021] Figure 3 A schematic diagram of airflow direction from a second perspective, provided for some embodiments of this application.
[0022] Figure 4This is a schematic diagram showing the airflow discharged from a secondary radiator in some embodiments of this application.
[0023] Figure 5 This is a schematic diagram of a curved heat dissipation fin provided for some embodiments of this application.
[0024] Figure 6 Another AC-coupled energy storage system with integrated heat dissipation structure is provided for some embodiments of this application.
[0025] Figure 7 This is a schematic diagram of two adjacent battery cells to be stacked, provided for some embodiments of this application.
[0026] Figure 8 A schematic diagram of an AC-coupled energy storage system with integrated heat dissipation structure provided for some embodiments of this application. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] 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 belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0029] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.
[0030] The term "embodiment" as used herein 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 the phrase "embodiment" 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.
[0031] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0032] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0033] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0034] Figure 1 An AC-coupled energy storage system with an integrated heat dissipation structure is provided in some embodiments of this application, such as... Figure 1 As shown, an AC-coupled energy storage system with an integrated heat dissipation structure includes: a battery module 01, an inverter module, and a main heat sink 02. The inverter module is located inside the main heat sink 02 and is thermally coupled to the main heat sink 02. The main heat sink 02 includes a centrifugal fan 021, which is located in the central area of the main heat sink 02 and above the inverter module. An LED light strip 022 and multiple interfaces 023 are provided on the outer periphery of the main heat sink 02. The LED light strip 022 and interfaces 023 are electrically connected to the inverter module. The bottom of the main heat sink 02 is connected to the top of the battery module 01 through a first plug-and-play interface. When the main heat sink 02 is installed on the battery module, it can simultaneously establish mechanical, electrical, and communication connections without the need for external cables. Interface 023 can be a grid interface, a load interface, an input / output interface, etc. The battery module 01 can be a lithium iron phosphate battery.
[0035] In this embodiment, a compact thermal management architecture is constructed by placing the inverter module inside and thermally coupling it to the main heat sink 02, and simultaneously placing the centrifugal fan 021 in the central area of the main heat sink 02 above the inverter module. This architecture significantly shortens the heat transfer path, reduces thermal resistance, and ensures that the heat from the inverter module during high-load operation can be quickly and efficiently dissipated, thereby avoiding performance derating due to overheating and significantly improving the system's power stability and long-term operational reliability. By setting a first plug-and-play interface at the bottom of the main heat sink 02 and the top of the battery module 01, the system can simultaneously establish mechanical, electrical, and communication connections during installation without the need for external cables. This eliminates complex on-site wiring work, minimizes installation time and labor costs, and fundamentally avoids failures caused by loose or incorrect cable connections, achieving true "one-click" rapid deployment and modular expansion.
[0036] By integrating LED strip 022 and multiple interfaces 023 around the main heat sink 02 and electrically connecting them to the inverter module, the system can clearly and intuitively display its operating mode (such as grid-connected operation mode, off-grid backup mode, battery charging mode, and battery discharging mode) and fault information through rich visual signals (such as the color and flashing pattern of LED strip 022), greatly facilitating real-time monitoring and fault diagnosis for users. For example, when LED strip 022 displays green, it indicates grid-connected operation mode; when it displays blue, it indicates off-grid backup mode; when it displays yellow, it indicates battery charging mode; and when it displays purple, it indicates battery discharging mode. When LED strip 022 flashes red, it indicates a fault. Simultaneously, standardized interfaces facilitate subsequent connection to external devices, enhancing the system's functional expandability.
[0037] In some embodiments, the main heat sink 02 further includes one or more secondary heat sinks 024, which are fixed to the main heat sink 02 and used to dissipate heat from the inverter module. Figure 1 As shown, the main heat sink 02 includes two secondary heat sinks 024.
[0038] In some embodiments, Figure 2 A schematic diagram of airflow direction from a first-view perspective provided for some embodiments of this application. Figure 3 This is a schematic diagram of airflow direction from a second perspective, provided for some embodiments of this application. Figure 4 This is a schematic diagram illustrating airflow discharged from a secondary radiator, as provided in some embodiments of this application. (See reference...) Figure 2 , Figure 3 and Figure 4The main radiator 02 also includes multiple curved heat dissipation fins 025 arranged around the centrifugal fan 021. These curved heat dissipation fins 025 together form an annular airflow channel, guiding the airflow radially through the curved heat dissipation fins 025 and discharging it from the heat dissipation fins of the secondary radiator 024. Figure 2 The circular arrow in the middle indicates the direction of airflow within the annular airflow channel.
[0039] The annular airflow channel matches the radial airflow characteristics of the centrifugal fan 021, forming a high-speed heat dissipation channel with low flow resistance and a short path. The airflow is uniformly and radially guided to all curved heat dissipation fins 025, avoiding the "dead zones" and vortices present in traditional air ducts.
[0040] In some embodiments, the profile of each curved heat dissipation fin 025 follows a logarithmic spiral. A logarithmic spiral is a streamlined curve whose curvature changes to match the actual trajectory of the airflow with a specific velocity and direction discharged from the centrifugal fan 021. When the airflow passes over the fin surface following this curve, it achieves almost seamless wall-hugging flow, effectively avoiding eddies and turbulence caused by the separation of airflow from the fin surface. This reduces energy loss during flow, achieving low-power, high-efficiency heat dissipation. Furthermore, the wall-hugging airflow suppresses noise generation, allowing the system to remain relatively quiet even during high-speed heat dissipation operation, thus improving the user experience.
[0041] Figure 5 A schematic diagram of a curved heat dissipation fin is provided for some embodiments of this application, with reference to... Figure 5 For example, the chamfer angle of the curved heat dissipation fin 025 can be 18°. The inner starting point of two special curved heat dissipation fins 0251 is far from the centrifugal fan 021. For example, the inner starting point of the special curved heat dissipation fin 0251 is 65 mm away from the centrifugal fan 021, and the inner starting point of the remaining curved heat dissipation fins 025 is 50 mm away from the centrifugal fan 021, in order to optimize airflow distribution.
[0042] Figure 6 Another AC-coupled energy storage system with integrated heat dissipation structure provided in some embodiments of this application, such as Figure 6 As shown, the top of the main radiator 02 can be equipped with louvers 026, which serve as the air inlet for the centrifugal fan 021. The louvers 026 can prevent snow, ice, and other contaminants from entering the centrifugal fan 021, effectively resisting the influence of the outdoor environment and improving overall reliability.
[0043] In some embodiments, the battery module 01 includes a plurality of battery cells stacked along the direction of gravity, and adjacent stacked battery cells are connected through a second plug-and-play interface.
[0044] Figure 7 This is a schematic diagram of two adjacent battery cells to be stacked, provided for some embodiments of this application.
[0045] like Figure 7 As shown, the second plug-and-play interface includes a second groove 03, a second protrusion 04, a second bolt 05, and a third threaded hole 07. The second groove 03 is located at the bottom of the first battery unit 011, and the second protrusion 04 is located at the top of the second battery unit 012. The second groove 03 and the second protrusion 04 cooperate with each other. The first battery unit 011 is the upper battery unit among two adjacent battery units, and the second battery unit 012 is the lower battery unit among two adjacent battery units. The third threaded hole 07 communicates with the second groove 03. The second protrusion 04 has a fourth threaded hole. After the second groove 03 and the second protrusion 04 are engaged, the third threaded hole 07 and the fourth threaded hole communicate with each other. The second bolt 05 passes through the third threaded hole 07 and is fixed to the fourth threaded hole.
[0046] It is understood that, assuming the battery module 01 includes 3 battery units, in order to facilitate stacking with the battery units below, the bottom of the second battery unit 012 may also be provided with a groove to cooperate with the protrusion provided on the top of the battery unit below it, and may also be provided with a threaded hole communicating with the groove. Its specific structure can be referred to the bottom structure of the first battery unit 011, and will not be described in detail in this embodiment.
[0047] In practical applications, refer to Figure 7 The bottom of the first battery unit 011 may also be provided with a third groove 08, and the top of the second battery unit 012 may also be provided with a third protrusion 09. The third groove 08 and the third protrusion 09 cooperate to achieve electrical connection upon contact.
[0048] In some embodiments, the first plug-and-play interface includes a first groove, a first protrusion, a first bolt, and a first threaded hole. The first groove is located at the bottom of the main heat sink 02, and the first protrusion is located at the top of the battery module 01, that is, the first protrusion is located at the top of the battery unit in the battery module 01 connected to the main heat sink 02. The first groove and the first protrusion cooperate with each other. The first threaded hole communicates with the first groove, and the first protrusion has a second threaded hole. After the first groove and the first protrusion cooperate, the first threaded hole and the second threaded hole communicate with each other. The first bolt passes through the first threaded hole and is fixed in the second threaded hole. The structure of the first plug-and-play interface is the same as that of the second plug-and-play interface. Refer to the foregoing description and drawings of the second plug-and-play interface. This embodiment will not repeat the description. The first plug-and-play interface can achieve power and communication connection through the contact of the first groove and the first protrusion.
[0049] In some embodiments, the bottom of the main heat sink 02 may also be provided with a third groove 08, and the top of the battery unit in the battery module 01 connected to the main heat sink 02 may also be provided with a third protrusion 09. The third groove 08 and the third protrusion 09 cooperate to achieve power and communication connection through the contact between the third protrusion and the third groove.
[0050] In some embodiments, the AC-coupled energy storage system with integrated heat dissipation structure may further include a base 10, which is connected to the bottom of the battery module 01. The AC-coupled energy storage system with integrated heat dissipation structure may also include a pluggable human-machine interface module, which is connected to the controller within the inverter module via a communication interface for monitoring the system's operating mode and setting parameters.
[0051] In practical applications, AC-coupled energy storage systems with integrated heat dissipation structures can also include multiple sealing components. For example, the sealing component can be a sealing ring. The sealing component can be set at the stacking of two adjacent battery cells, or at the connection between the main heat sink 02 and the battery module 01.
[0052] Figure 8 A schematic diagram illustrating the operation of an AC-coupled energy storage system with integrated heat dissipation structure, provided for some embodiments of this application. (Reference) Figure 8 The AC-coupled energy storage system, integrated with a heat dissipation structure, can be connected to the power grid 11 and the household load 12. A current transformer 14 or power meter located at the grid connection point measures the incoming / outgoing power and feeds this power back to the controller within the inverter module to limit the outgoing power. The normal operating mode involves the grid supplying power to charge the battery module 01; the backup mode involves the inverter module supplying power to the household load 12 from the battery module 01 during a grid outage. The human-machine interface module 15 connects to the controller within the inverter module via a communication interface to monitor the system's operating mode and set parameters.
[0053] When the system is connected to the power grid 11, the inverter module can draw AC power from the grid 11 and / or discharge from the connected battery module 01 to power the household load 12. A current transformer 14 or power meter measures the real-time power flow and feeds this power back to the controller within the inverter module. The inverter module adjusts its output power accordingly to meet grid requirements and optimize the charging of the battery module 01. The main radiator 02 operates automatically, and the centrifugal fan 021 automatically adjusts its speed based on signals from the temperature sensor within the main radiator 02. During normal operation, excess grid energy charges the battery module 01, and an LED strip 022 displays the current operating mode. When the grid fails, the inverter module automatically switches to standby mode, drawing power from the battery module 01 to maintain the operation of the critical household load 12.
[0054] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0055] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. An AC-coupled energy storage system with an integrated heat dissipation structure, characterized in that, include: Battery module, inverter module, and main heat sink; The inverter module is located inside the main heat sink, and the inverter module is thermally coupled to the main heat sink; The main radiator includes a centrifugal fan, which is located in the central area of the main radiator and above the inverter module. The main heat sink is provided with an LED light strip and multiple interfaces on its outer periphery. The LED light strip and the interfaces are electrically connected to the inverter module. The bottom of the main heat sink is connected to the top of the battery module via a first plug-and-play interface. When the main heat sink is installed on the battery module, it can simultaneously establish mechanical, electrical, and communication connections without the need for external cables.
2. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 1, characterized in that, The main heat sink also includes one or more secondary heat sinks, which are fixed to the main heat sink and used to dissipate heat for the inverter module.
3. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 2, characterized in that, The main radiator also includes a plurality of curved heat dissipation fins arranged around the centrifugal fan. The plurality of curved heat dissipation fins together form an annular airflow channel to guide the airflow radially and through the curved heat dissipation fins, and discharge it from the heat dissipation fins of the secondary radiator.
4. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 3, characterized in that, The outline shape of each of the curved heat dissipation fins follows a logarithmic spiral.
5. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 1, characterized in that, The top of the main radiator is provided with louvers, which serve as the air inlet for the centrifugal fan.
6. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 1, characterized in that, The battery module includes multiple battery cells stacked along the direction of gravity, and adjacent stacked battery cells are connected through a second plug-and-play interface.
7. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 1, characterized in that, The first plug-and-play interface includes a first groove, a first protrusion, a first bolt, and a first threaded hole; The first groove is located at the bottom of the main heat sink, and the first protrusion is located at the top of the battery module. The first groove and the first protrusion cooperate with each other. The first threaded hole communicates with the first groove, and the first protrusion is provided with a second threaded hole. After the first groove and the first protrusion are engaged, the first threaded hole and the second threaded hole communicate with each other. The first bolt passes through the first threaded hole and is fixed to the second threaded hole.
8. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 6, characterized in that, The second plug-and-play interface includes a second groove, a second protrusion, a second bolt, and a third threaded hole; The second groove is located at the bottom of the first battery unit, and the second protrusion is located at the top of the second battery unit. The second groove and the second protrusion cooperate with each other. The first battery unit is the upper battery unit among two adjacent battery units, and the second battery unit is the lower battery unit among two adjacent battery units. The third threaded hole communicates with the second groove, and the second protrusion is provided with a fourth threaded hole. After the second groove and the second protrusion are engaged, the third threaded hole and the fourth threaded hole communicate with each other, and the second bolt passes through the third threaded hole and is fixed to the fourth threaded hole.
9. The AC-coupled energy storage system with integrated heat dissipation structure according to claim 1, characterized in that, The system also includes a base that is connected to the bottom of the battery module.