A residential energy storage inverter

Abstract

This application discloses a residential energy storage inverter, relating to the technical field of inverters. It includes a chassis with adjacent first and second regions within it. A power conversion module is arranged on the first region. The second region includes an upper and a lower layer; a power module is arranged on the upper layer, and a control module is arranged on the lower layer. A first heat dissipation fin is provided on the outer wall of the chassis, and the chassis and the first heat dissipation fin are in thermal contact. The first heat dissipation fin rests against the power conversion module. An inductor box is provided on the outer wall of the chassis, and the inductor box is in thermal contact with the outer wall of the chassis. The inductor box and the first heat dissipation fin are arranged side-by-side. By setting up the first and second regions and layering them within the second region, this application achieves a compact internal structure, reducing chassis size and wiring complexity, facilitating maintenance and repair, and lowering costs.

Description

Technical Field

[0001] This utility model relates to the technical field of inverters, specifically to a residential energy storage inverter. Background Technology

[0002] With increasing demands for energy efficiency and stability, residential energy storage systems have become widely used. The 10kW residential energy storage inverter, as the core equipment of such systems, plays a crucial role in converting DC power from batteries into AC power for household use and in enabling interaction with the power grid. However, existing 10kW residential energy storage inverters have several shortcomings: their functional modules are relatively dispersed, occupying a large space, resulting in a large overall size and increased wiring complexity and cost; they also suffer from poor heat dissipation, low equipment reliability, and short inverter lifespan. Utility Model Content

[0003] Therefore, to solve the above problems, this utility model provides a residential energy storage inverter.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A residential energy storage inverter includes a chassis with two adjacent regions: a first region and a second region. A power conversion module is disposed in the first region, and the second region includes an upper layer and a lower layer. A power supply module is disposed in the upper layer, and a control module is disposed in the lower layer. A first heat dissipation fin is disposed on the outer wall of the chassis, and the chassis and the first heat dissipation fin are in thermal contact. The first heat dissipation fin rests against the power conversion module. An inductor box is disposed on the outer wall of the chassis, and the inductor box is in thermal contact with the outer wall of the chassis. The inductor box and the first heat dissipation fin are arranged side by side.

[0006] Optionally, a first mounting plate and a second mounting plate are also arranged parallel to each other on the bottom of the outer wall of the chassis. Both the first mounting plate and the second mounting plate are in thermal contact with the chassis, and both the first mounting plate and the second mounting plate are provided with snap-fit ​​notches for external mounting brackets to snap-fit ​​and install.

[0007] Optionally, the first mounting plate is arranged on the side of the first heat sink fin away from the inductor box, and the first mounting plate is parallel to and integrally connected with the first heat sink fin; the second mounting plate is arranged on the side of the inductor box away from the first heat sink fin, and the second mounting plate is integrally connected with the inductor box.

[0008] Optionally, the second mounting plate has an L-shaped cross-section and includes an integrally connected first connecting part and a second connecting part. The first connecting part is fitted to the chassis and integrally connected to the inductor box. The second connecting part is parallel to the first mounting plate, and the snap-fit ​​notch is provided on the second connecting part.

[0009] Optionally, a second heat dissipation fin is arranged on the outer wall of the inductor box, and the second heat dissipation fin is arranged on the side wall of the inductor box close to the first heat dissipation fin; an extension plate is also provided on the side of the inductor box away from the chassis, the extension plate is integrally connected to the inductor box and parallel to the bottom surface of the chassis.

[0010] Optionally, a fan is installed inside the chassis, and the control module is electrically connected to the fan to control the start and stop of the fan.

[0011] Optionally, the power module has a transformer, and the fan's air outlet direction is towards the transformer.

[0012] Optionally, at least one temperature sensor is installed inside the chassis. The temperature sensor is electrically connected to the control module, and the control module can control the start and stop of the fan according to the signal from the temperature sensor.

[0013] Optionally, a communication module is also included. The communication module is disposed on the side wall of the chassis. The communication module can support at least one of the communication protocols of Wi-Fi, Bluetooth, and Ethernet. The communication module is connected to the control module so that the inverter can be remotely monitored through the communication module.

[0014] Optionally, the power module is connected to a first aviation connector, and the control module is connected to a second aviation connector. The first aviation connector and the second aviation connector are both located on the same side wall of the chassis, and are located on the same side wall of the chassis as the communication module.

[0015] The technical solution provided by this utility model has the following beneficial effects:

[0016] 1. By setting up a first area and a second area, the power conversion module is arranged in the first area, and the power supply module and control module are arranged in layers in the second area. This makes the internal structure of the chassis more compact, reduces the size of the chassis and the complexity of the wiring, facilitates maintenance and repair, and reduces costs. The first heat sink fins back to the power conversion module, which can effectively exchange heat with it. The inductor box is arranged on the outer wall of the chassis, which can reduce the impact of the heat generated by the inductor on the various components inside the chassis, and ensure the normal operation of the various components in the inverter.

[0017] 2. The first mounting plate and the second mounting plate serve as components for mounting and connecting with the external mounting bracket, and also as heat dissipation components to increase the heat dissipation area and improve the heat dissipation capacity;

[0018] 3. The fan design can prevent the inverter from overheating, thus ensuring the normal operation of all components and improving reliability; and the temperature sensor enables the control module to intelligently control the start and stop of the fan.

[0019] 4. The communication module, the first aviation connector, and the second aviation connector are located on the same side wall of the chassis, which makes the internal wiring of the inverter neat and reduces the complexity of wiring. It also facilitates the installation and maintenance of the inverter and external wiring harnesses. In addition, the communication module can connect to the user's mobile phone, smart home system, or power grid management platform, enabling the inverter to be remotely monitored. The operating strategy can be adjusted in real time according to the battery status and power grid conditions to improve energy utilization efficiency, while also facilitating remote management and operation by the user. Attached Figure Description

[0020] Figure 1 This is a plan view showing the chassis, power conversion module, power supply module and control module in this embodiment;

[0021] Figure 2 This is a cross-sectional view of the inverter in this embodiment;

[0022] Figure 3 This is a schematic diagram of the inverter structure in this embodiment;

[0023] Figure 4 This is a schematic diagram of the first heat dissipation fin and the first mounting plate in this embodiment;

[0024] Figure 5 This is a schematic diagram of the inductor box, the second mounting plate, and the second heat sink in this embodiment.

[0025] Explanation of reference numerals in the attached drawings: 1. Chassis; 2. Power conversion module; 3. Power supply module; 31. Transformer; 4. Control module; 5. Inductor box; 6. First heat sink fin; 7. First mounting plate; 8. Second mounting plate; 81. First connecting part; 82. Second connecting part; 9. Second heat sink fin; 10. Extension plate; 11. Fan; 12. Snap-fit ​​notch; 13. Communication module; 14. First aviation connector; 15. Second aviation connector. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 1 and Figure 2This embodiment provides a residential energy storage inverter, including a chassis 1. The chassis 1 is made of a metal material with good mechanical strength and electromagnetic shielding performance. The bottom surface inside the chassis 1 has two adjacent regions, a first region and a second region. Both the first and second regions are rectangular. A power conversion module 2 is arranged on the first region; the second region includes an upper layer and a lower layer, with a power module 3 arranged on the upper layer and a control module 4 arranged on the lower layer. A first heat dissipation fin 6 is provided on the bottom surface outside the chassis 1, and the chassis 1 and the first heat dissipation fin 6 are in thermal contact. The first heat dissipation fin 6 is backed by the power conversion module 2, ensuring good heat dissipation. An inductor box 5 is provided on the outer wall of the chassis 1, and the inductor box 5 is in thermal contact with the outer wall of the chassis 1; the inductor box 5 is arranged side-by-side with the first heat dissipation fin 6.

[0029] The interior of chassis 1 is divided into a first area and a second area. The second area is further divided into upper and lower layers for arranging the control module 4 and power module 3. This allows for a compact internal module layout, reducing equipment size and wiring complexity, facilitating installation and maintenance, and lowering costs. The first heat sink 6 provides heat exchange for the power conversion module 2, ensuring its normal operating temperature. The inductor box 5 is located outside chassis 1, reducing the impact of heat from inside the inductor box 5 on the power conversion module 2, ensuring the normal operation of all components on the power conversion module 2, and improving reliability.

[0030] Reference Figure 3-5 The bottom of the chassis 1 is also provided with a first mounting plate 7 and a second mounting plate 8 that are parallel to each other. Both the first mounting plate 7 and the second mounting plate 8 are in thermal contact with the chassis 1. Both the first mounting plate 7 and the second mounting plate 8 are provided with L-shaped snap-fit ​​notches 12 for external mounting brackets to snap-fit ​​and install.

[0031] Specifically, the first mounting plate 7 is arranged on the side of the first heat sink fin 6 away from the inductor box 5, and the first mounting plate 7 is parallel to and integrally connected with the first heat sink fin 6. The second mounting plate 8 is arranged on the side of the inductor box 5 away from the first heat sink fin 6, and the second mounting plate 8 is integrally connected with the housing of the inductor box 5. The second mounting plate 8 has an L-shaped cross-section and includes an integrally connected first connecting part 81 and a second connecting part 82. The first connecting part 81 fits against the chassis 1 and is integrally connected with the housing of the inductor box 5. The second connecting part 82 is parallel to the first mounting plate 7, and a snap-fit ​​notch 12 is provided on the second connecting part 82. Thus, there is a gap between the second connecting part 82 and the inductor box 5, leaving installation space, which facilitates the snap-fit ​​installation of the second connecting part 82 by an external mounting bracket. Therefore, the first mounting plate 7 and the second mounting plate 8 can serve as components for connection and fixation with external mounting brackets. Simultaneously, the first mounting plate 7 and the second mounting plate 8 also serve as heat dissipation components, increasing the overall heat dissipation area of ​​the inverter and improving its heat dissipation capacity.

[0032] A second heat dissipation fin 9 is integrally connected to the outer wall of the inductor box 5. Specifically, the second heat dissipation fin 9 is arranged on the side wall of the inductor box 5 near the first heat dissipation fin 6, thus further increasing the inverter's heat dissipation capacity. An extension plate 10 is also provided on the side of the inductor box 5 away from the chassis 1. The extension plate 10 is integrally connected to the shell of the inductor box 5 and is parallel to the bottom surface of the chassis 1. The extension plate 10 further increases the inverter's heat dissipation area.

[0033] A fan 11 is installed inside the chassis 1. The control module 4 is electrically connected to the fan 11 to control its start and stop. The fan 11 helps to ensure a more uniform temperature inside the chassis 1, preventing localized overheating. Specifically, for example... Figure 1 The power module 3 has a transformer 31, and the fan 11 is arranged above the first area, close to the power module 3, and facing the transformer 31. Since the transformer 31 generates a large amount of heat per unit time, the fan 11 can dissipate heat from the transformer 31 in a timely manner, avoiding malfunctions caused by excessive local temperature inside the chassis 1.

[0034] Furthermore, at least one temperature sensor is arranged inside the chassis 1. The temperature sensor is electrically connected to the control module 4, and the control module 4 can receive signals from the temperature sensor to control the fan 11 to turn on or off. The control module 4 is configured with a temperature threshold. When the temperature sensor sends a signal to the control module 4, the control module 4 can determine whether the temperature value inside the chassis 1 exceeds the temperature threshold based on the received signal, and thus turn the fan 11 on or off; that is, if the temperature exceeds the threshold, the fan 11 is turned on, and vice versa. It can also adjust the speed of the fan 11 based on the received temperature value to achieve energy saving. In this embodiment, one temperature sensor is arranged and installed near the transformer 31 of the power module 3, which can promptly feed back the temperature near the transformer 31 to the control module 4, allowing the control module 4 to control the fan 11 to turn on or off in a timely manner. In other embodiments, two or more temperature sensors may be arranged, corresponding to the main heat-generating components, to monitor and feed back to the control module 4 in real time; and when the temperature fed back by any one temperature sensor reaches the set temperature for turning on the fan 11, the control module 4 controls the fan 11 to turn on; when the temperature fed back by all temperature sensors drops to the set temperature for turning off the fan 11, the control module 4 controls the fan 11 to turn off.

[0035] The control module 4 features a high-performance microprocessor with powerful data processing and control capabilities. It collects real-time data on battery voltage, current, and temperature, as well as grid voltage, frequency, and phase information. Advanced algorithms within the microprocessor precisely control the power conversion module 2. The control module 4 intelligently adjusts the inverter's charging and discharging modes and power output based on the battery's state of charge (SOC) and the grid's peak-valley pricing strategy, optimizing energy utilization. For example, in charging mode, during off-peak hours, the control module 4 directs the inverter to charge the battery from the grid as much as possible, fully utilizing stored low-cost electricity. Even if the battery's SOC has reached a certain level, charging will continue if there is sufficient charging space and more economical electricity can be obtained. During peak-valley hours, the control module 4 stops charging the battery from the grid, prioritizing the use of stored battery energy to power the load, avoiding drawing electricity from the grid during high-price periods and reducing electricity costs. In discharge mode, when the grid is in peak electricity price period, control module 4 will increase the inverter's discharge power to allow the battery to supply as much power as possible to the load and reduce the amount of electricity purchased from the grid. When the grid is in off-peak electricity price period, control module 4 will reduce the inverter's discharge power, prioritize the use of low-priced grid electricity, and charge the battery appropriately to prepare for subsequent peak periods.

[0036] In addition, the control module 4 also has fault diagnosis and protection functions. When abnormal conditions such as overcurrent, overvoltage, undervoltage, and overheating are detected, it can quickly take protective measures, such as cutting off the circuit, to ensure the safety of equipment and personnel.

[0037] The power conversion module employs an advanced power electronic topology, enabling highly efficient DC-AC conversion. It incorporates multiple high-performance power semiconductor devices (such as IGBTs), and through precise control of their on / off states, achieves stable and efficient power conversion at a 10kW power level. Simultaneously, the power conversion module integrates a filter circuit, effectively filtering out harmonics in the output AC power and improving power quality.

[0038] Reference Figure 1The inverter also includes a communication module 13, which is mounted on the side wall of the chassis 1. The communication module 13 supports at least one of the following communication protocols: Wi-Fi, Bluetooth, and Ethernet. It is connected to the control module 4, enabling remote monitoring of the inverter. Users can monitor the inverter's operating status, battery level, and power consumption in real time via a mobile app, and perform operations such as setting charging / discharging modes and adjusting power output. In this embodiment, the communication module 13 simultaneously supports Wi-Fi, Bluetooth, and Ethernet communication protocols. Thus, different communication protocols can be used in different usage scenarios, enhancing flexibility: different users and scenarios have different needs for communication methods. For example, Bluetooth connection may be more convenient when temporarily monitoring the inverter status; while Ethernet or Wi-Fi is more suitable when remotely and stably acquiring large amounts of data. This also improves compatibility: support for multiple communication protocols allows the inverter to better communicate with various devices, facilitating system integration and expansion. Furthermore, it enhances reliability: if one communication method is interfered with or malfunctions, other communication protocols can serve as backups. For example, when the Wi-Fi signal is unstable due to interference, it can switch to Ethernet for data transmission, ensuring continuous and reliable data upload and reception. Users can quickly connect to the inverter via Bluetooth on their mobile phones for simple parameter settings and troubleshooting. In daily use, using Wi-Fi, users can view the inverter's power generation data, operating status, and other information anytime indoors via a mobile app, enabling real-time monitoring. For more in-depth inverter debugging or integration with a home energy management system, Ethernet connection can be used to achieve stable and high-speed data transmission.

[0039] The power module 3 is connected to a first aviation connector 14 via a wire, and the control module 4 is connected to a second aviation connector 15 via a wire. The first aviation connector 14 and the second aviation connector 15 are arranged side by side on the same side wall of the chassis 1, and are also located on the same side wall of the chassis 1 as the communication module 13. This arrangement keeps the internal wiring of the inverter neat, reduces wiring complexity, and facilitates the installation and maintenance of external wiring harnesses, thereby reducing costs. Furthermore, in this embodiment, other wiring harness connectors of the inverter are also located on the same side wall of the chassis 1 as the communication module 13.

[0040] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A residential energy storage inverter, characterized in that: The system includes a chassis, within which are arranged adjacent first and second regions. A power conversion module is disposed in the first region, and the second region includes an upper layer and a lower layer. A power supply module is disposed in the upper layer, and a control module is disposed in the lower layer. A first heat dissipation fin is disposed on the outer wall of the chassis, and the chassis and the first heat dissipation fin are in thermal contact. The first heat dissipation fin rests against the power conversion module. An inductor box is disposed on the outer wall of the chassis, and the inductor box is in thermal contact with the outer wall of the chassis. The inductor box and the first heat dissipation fin are arranged side by side.

2. A residential energy storage inverter according to claim 1, characterized in that: The bottom of the outer wall of the chassis is also provided with a first mounting plate and a second mounting plate in parallel. Both the first mounting plate and the second mounting plate are in thermal contact with the chassis, and both the first mounting plate and the second mounting plate are provided with snap-fit ​​notches for external mounting brackets to snap-fit ​​and install.

3. A residential energy storage inverter according to claim 2, characterized in that: The first mounting plate is arranged on the side of the first heat sink fin away from the inductor box, and the first mounting plate is parallel to and integrally connected with the first heat sink fin; the second mounting plate is arranged on the side of the inductor box away from the first heat sink fin, and the second mounting plate is integrally connected with the inductor box.

4. A residential energy storage inverter according to claim 3, characterized in that: The second mounting plate has an L-shaped cross-section and includes an integrally connected first connecting part and a second connecting part. The first connecting part is attached to the chassis and integrally connected to the inductor box. The second connecting part is parallel to the first mounting plate, and the snap-fit ​​notch is provided on the second connecting part.

5. A residential energy storage inverter according to claim 1, characterized in that: The outer wall of the inductor box is provided with a second heat dissipation fin, and the second heat dissipation fin is arranged on the side wall of the inductor box near the first heat dissipation fin; an extension plate is also provided on the side of the inductor box away from the chassis, the extension plate is integrally connected to the inductor box and is parallel to the bottom surface of the chassis.

6. A residential energy storage inverter according to claim 1, characterized in that: The chassis is equipped with a fan, and the control module is electrically connected to the fan to control the start and stop of the fan.

7. A residential energy storage inverter according to claim 6, characterized in that: The power module has a transformer, and the fan's air outlet direction is towards the transformer.

8. A residential energy storage inverter according to claim 6 or 7, characterized in that: At least one temperature sensor is installed inside the chassis. The temperature sensor is electrically connected to the control module, and the control module can control the start and stop of the fan according to the signal from the temperature sensor.

9. A residential energy storage inverter according to claim 1, characterized in that: It also includes a communication module, which is installed on the side wall of the chassis. The communication module supports at least one of the communication protocols of Wi-Fi, Bluetooth, and Ethernet, and is connected to the control module so that the inverter can be remotely monitored through the communication module.

10. A residential energy storage inverter according to claim 9, characterized in that: The power module is connected to a first aviation connector, and the control module is connected to a second aviation connector. Both the first and second aviation connectors are located on the same side wall of the chassis and are located on the same side wall of the chassis as the communication module.

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