Energy storage device

Abstract

The utility model discloses energy storage equipment, and belongs to the technical field of energy storage energy. The energy storage device includes: a first housing; the second shell is provided with radiating fins, and the radiating fins are arranged on the outer wall surface of the second shell; the second shell and the first shell are in butt joint with each other to form a closed box body; the power module is arranged in the box body and comprises a power circuit board, the power circuit board is provided with a power module and a plurality of interface slots, and the plane where the power circuit board is located is parallel to the second surface or forms a preset included angle with the second surface; the power module is arranged on one side, facing the second shell, of the power circuit board; and the plurality of functional circuit boards are respectively inserted into the power circuit board through the plurality of interface slots, so that the power circuit board expands corresponding functions of the plurality of functional circuit boards. The overall occupied area of the power module of the energy storage equipment is small, so that the size of the energy storage equipment is reduced, meanwhile, the heat conduction path is short, and rapid heat dissipation can be achieved.

Description

Technical Field

[0001] This application belongs to the field of energy storage, specifically relating to an energy storage device. Background Technology

[0002] Energy storage devices have peak-shaving and valley-filling functions. Through a "storing electricity during off-peak hours and releasing energy during peak hours" mechanism, they effectively alleviate the dynamic imbalance between the generation and consumption sides. In this way, energy storage devices can improve the reliability and stability of the power system, optimize the allocation of power resources, and are of great significance for promoting the optimization and upgrading of the energy structure and sustainable development. As a type of household backup power supply device, it has wide applications in people's lives.

[0003] In order to increase the capacity of energy storage devices, the size of these devices is designed to be relatively large, taking up a lot of space. However, energy storage devices are usually placed on balconies when in use, but the space on balconies is limited, making it inconvenient to use them.

[0004] Therefore, without reducing capacity, there is an urgent need to design a smaller energy storage device. Utility Model Content

[0005] The purpose of this application is to provide an energy storage device that can solve the problem of large space occupation by energy storage devices.

[0006] This application proposes an energy storage device, comprising: a first housing having a first surface with a first opening; a second housing having a second surface and a heat sink with a second opening on the second surface, the heat sink being disposed on the outer wall of the second housing; the second surface of the second housing and the first surface of the first housing being abutted against each other to form a closed enclosure; a power module disposed within the enclosure, comprising: a power circuit board having a power module and multiple interface slots on the power circuit board, the plane of the power circuit board being parallel to the second surface or having a preset angle; the power module being disposed on the side of the power circuit board facing the second housing; and multiple functional circuit boards, the multiple functional circuit boards being inserted into the power circuit board through multiple interface slots to enable the power circuit board to extend the functions corresponding to the multiple functional circuit boards.

[0007] In the above technical solution, the power module occupies a small area, which helps to reduce the size of the energy storage device. At the same time, the heat conduction path is short, which enables rapid heat dissipation.

[0008] In some technical solutions, optionally, the plane containing multiple functional circuit boards is arranged perpendicularly to the plane containing the power circuit board, and / or, the multiple functional circuit boards are located on the same side of the power circuit board where the power module is located. This can further reduce the occupied area.

[0009] In some technical solutions, the power module optionally includes: a battery input unit, a first inverter unit, and a second inverter unit; the first inverter unit is located in the middle area of ​​the power circuit board and is used for DC-DC conversion; the battery input unit is located on one side of the first inverter unit in a first direction and is used to transfer electrical energy; the second inverter unit is located on the other side of the first inverter unit in a first direction and is used for DC-AC conversion. This reduces wiring length and avoids interference.

[0010] In some technical solutions, optionally, multiple functional circuit boards include at least one of a main control board, a driver board, and a filter board; the main control board is used to control the operation of the power module; the driver board is used to convert control signals into drive power to drive the first inverter unit and the second inverter unit; and the filter board is used to filter electrical energy. This allows for corresponding functional expansion.

[0011] In some technical solutions, the interface slot may optionally include a first slot; the first slot is disposed in a second direction on the side of the power circuit board where the first inverter unit and the second inverter unit are located, for inserting the main control board. This reduces wiring length and lowers the risk of failure.

[0012] In some technical solutions, the interface slot may optionally include a second slot; the second slot is located on the power circuit board and close to the first inverter unit, for inserting the driver board. This avoids electromagnetic interference.

[0013] In some technical solutions, the driver board optionally includes a first sub-board and a second sub-board. The first sub-board is disposed on the power circuit board and close to the first inverter unit, and the second sub-board is located on the side of the first sub-board away from the second inverter unit. The operating voltage of the first sub-board is greater than that of the second sub-board. This avoids electromagnetic interference.

[0014] In some technical solutions, the interface slot may optionally include a third slot, located on the side of the battery input unit opposite to the first inverter unit in the first direction, for inserting a filter board. This can avoid electromagnetic interference.

[0015] In some technical solutions, the power module may optionally include a power optimization unit, which is disposed on one side of the battery input unit in the second direction, for adjusting the power distribution between the first inverter unit and the second inverter unit. This ensures the normal operation of the inverter units.

[0016] In some technical solutions, optionally, the power optimization unit has a third slot on the side facing away from the first inverter unit in the first direction for inserting a filter board. This avoids electromagnetic interference and overheating.

[0017] In some technical solutions, the power circuit board is optionally provided with mounting slots; there are multiple mounting slots, including at least one of a battery input slot, a grid input slot, and a solar input slot.

[0018] In some technical solutions, the energy storage device may optionally include a battery module and a battery management module; the battery module is disposed on the side of the power circuit board facing the first housing; the battery management module is disposed between the battery module and the power circuit board; wherein, the side of the power circuit board facing the battery management module is also provided with a communication interface for connecting to the battery management module. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the energy storage device according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the first housing according to an embodiment of this application;

[0021] Figure 3 This is one of the structural schematic diagrams of the power module in the embodiments of this application;

[0022] Figure 4 This is a second schematic diagram of the power module structure in an embodiment of this application;

[0023] Figure 5 This is the third schematic diagram of the power module in the embodiments of this application.

[0024] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0025] 100 First housing; 110 First side; 111 First opening; 200 Second housing; 210 Second side; 211 Second opening; 220 Heat sink; 300 Power module; 310 Power circuit board; 311 Mounting slot; 3111 Battery input slot; 3112 Grid input slot; 3113 Solar input slot; 312 Communication interface; 320 Functional circuit board; 321 Main control board; 322 Driver board; 3221 First daughter board; 3222 Second daughter board; 323 Filter board; 330 Power module; 331 Battery input unit; 332 First inverter unit; 333 Second inverter unit; 334 Power optimization unit; 340 Interface slot; 341 First slot; 342 Second slot; 343 Third slot; 400 Battery module; 500 Battery management module; 600 Housing. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] In this specification, the terms "vertical" and "parallel" are explained.

[0029] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0030] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the parallelism is not absolute due to factors such as assembly tolerances, design tolerances, and structural flatness. These situations may result in the sliding mating part and the first door panel not being absolutely parallel, but this application also defines such situations as parallelism.

[0031] The following is combined Figures 1 to 5 The energy storage device provided in this application will be described in detail through specific embodiments and application scenarios.

[0032] To facilitate understanding of the positions of the components of the energy storage device provided in this application embodiment, the specific directions of the first and second directions are described below. The first direction is the horizontal direction or the left-right (width) direction of the energy storage device, and the second direction is the vertical direction or the up-down (height) direction of the energy storage device.

[0033] Reference Figures 1 to 5 Some embodiments of this application disclose an energy storage device, including a first housing 100, a second housing 200, and a power module 300.

[0034] Reference Figure 1 and Figure 2 Specifically, the first housing 100 has a first surface 110 with a first opening 111. The second housing 200 has a second surface 210 and a heat sink 220 with a second opening 211 on the second surface 210. The heat sink 220 is disposed on the outer wall surface of the second housing 200. The second surface 210 of the second housing 200 and the first surface 110 of the first housing 100 are connected to each other to form a closed box 600.

[0035] Reference Figure 3 , Figure 4 and Figure 5 The power module 300 is disposed within the housing 600 and includes a power circuit board 310 and multiple functional circuit boards 320. The plane of the power circuit board 310 is parallel to or has a predetermined angle with the second plane. The power circuit board 310 is provided with a power module 330 and multiple interface slots 340, with the power module located on the side of the power circuit board 310 facing the second housing 200. The multiple functional circuit boards 320 are inserted into the power circuit board through the multiple interface slots 340, thereby expanding the functions of the multiple functional circuit boards 320.

[0036] In the above embodiment, the power circuit board 310 serves as the substrate, and the functional circuit board 320 is inserted through the interface slot 340 to achieve functional expansion. Compared with related technologies where all functional circuits are laid flat on the same circuit board, the discrete design reduces the overall area, thereby helping to reduce the size of the energy storage device. At the same time, the functional circuit board 320 is expanded through the interface slot 340. When it is necessary to add or replace the functional circuit board 320, there is no need to modify the power circuit board 310; only a simple plug-and-play operation is required. Finally, the power module 330 is the main heat source. Placing it on the side of the power circuit board 310 facing the second housing 200 can shorten the heat conduction path, thereby achieving rapid heat dissipation through the heat sink 220 of the second housing 200.

[0037] In some implementations, the plane containing the multiple functional circuit boards 320 and the plane containing the power circuit board 310 are arranged perpendicularly. When the two are arranged perpendicularly, a natural airflow channel is formed, which is beneficial for heat dissipation.

[0038] In practical applications, multiple functional circuit boards 320 are arranged on the same side of the power circuit board 310 where the power module 330 is located. The functional circuit boards 320 and the power module 330 are located on the same side, thus making full use of the redundant space of the power module 330 and further reducing the occupied area.

[0039] In some embodiments, the power module 330 includes a battery input unit 331, a first inverter unit 332, and a second inverter unit 333.

[0040] The first inverter unit 332 is located in the central area of ​​the power circuit board 310 and is used for DC-DC conversion. A battery input unit is located on one side of the first inverter unit 332 in the first direction and is used to receive electrical energy from the battery and stably transmit it to the various functional units of the power module 330, ensuring the stability and reliability of electrical energy during the power conversion process. The second inverter unit 333 is located on one side of the first inverter unit 332 in the first direction and is used for DC-AC conversion.

[0041] In practical applications, the second inverter unit 333 is used for DC-AC conversion and typically employs high-frequency switching devices. These devices have significant switching and conduction losses, resulting in high heat generation. Therefore, it is positioned on one side of the power circuit board 310, close to the shell wall of the second housing 200, to facilitate heat dissipation. The first inverter unit 332, on the other hand, is used for DC-AC conversion. It has a relatively low switching frequency and lower energy loss during conversion, thus generating less heat. Positioning it in the central area avoids heat accumulation in the middle. The battery input unit 331 is located to one side of the first inverter unit 332, away from the second inverter unit 333. This avoids electromagnetic interference from the high-frequency signals of the second inverter unit 333, ensuring the purity of the input power. Furthermore, the close proximity of the battery input unit 331 to the first inverter unit 332 aligns with the direction of power flow, reducing wiring length and minimizing losses.

[0042] In some embodiments, the plurality of functional circuit boards 320 include at least one of a main control board 321, a driver board 322, and a filter board 323.

[0043] The main control board 321, acting as the "brain" of the power module 300, is responsible for coordinating and controlling the operation of the functional modules 330. For example, when the main control board 321 receives external control signals, it can adjust the operating parameters of the first inverter unit 332 and the second inverter unit 333 in real time to achieve efficient and stable operation of the energy storage device. Alternatively, when a change in output voltage is detected, the main control board 321 will quickly adjust the conversion parameters of the inverter units to ensure that the voltage and frequency of the output AC or DC power are stable within the set range.

[0044] The driver board 322 is used to drive the operation of the first inverter unit 332 and the second inverter unit 333. Its core function is to convert the control signal (weak current) into drive power (strong current) and precisely control the turn-on / turn-off of the power devices in the inverter unit.

[0045] The filter board 323 plays the role of "power purifier" in the power module of the energy storage device. It is specifically used to suppress electromagnetic interference, stabilize voltage / current waveforms, and ensure efficient and reliable operation of the system.

[0046] In the above embodiments, by physically separating the main control board 321, the driver board 322, the filter board 323, and the power circuit board 310, and inserting them through the interface slot 340 to expand functionality, compared with the related technology of laying all functional circuits on the same circuit board, the discrete design reduces the overall area, which is beneficial to reducing the size of the energy storage device.

[0047] In some embodiments, the interface slot 340 includes a first slot 341, which is disposed in a second direction on the side of the power circuit board 310 where the first inverter unit 332 and the second inverter unit 333 are provided, for inserting the main control board 321.

[0048] In the above embodiment, the main control board 321 is disposed on one side of the first inverter unit 332 and the second inverter unit 333 in the second direction and is connected adjacent to the inverter unit. This can reduce the signal transmission distance between the main control board 321 and the inverter unit, thereby reducing the wiring length and reducing the risk of failure.

[0049] In some embodiments, the interface slot 340 further includes a second slot 342, which is disposed on the power circuit board 310 near the first inverter unit 332 and is used to insert the driver board 322. The driver board 322 is disposed away from the second inverter unit 333 to avoid interference from the high-frequency signals of the second inverter unit 333.

[0050] In practical applications, the driver board 322 includes a first sub-board 3221 and a second sub-board 3222. The first sub-board 3221 is located on the power circuit board 310 near the first inverter unit 332, and the second sub-board 3222 is located on the side of the first sub-board 3221 away from the second inverter unit 333. The operating voltage of the first sub-board 3221 is greater than the operating voltage of the second sub-board 3222.

[0051] In the above embodiment, the first sub-board 3221 is used for high-voltage driving, and the second sub-board 3222 is used for low-voltage driving, achieving physical separation and avoiding common-mode interference. Simultaneously, the second sub-board 3222 is located away from the second inverter unit 333, preventing the high-frequency signals of the second inverter unit 333 from interfering with the low-voltage operation. In this embodiment, there are two second sub-boards 3222.

[0052] In some embodiments, the interface slot further includes a third slot 343, which is disposed on the side of the battery input unit 331 opposite to the first inverter unit 332 in a first direction, for inserting the filter board 323.

[0053] In the above embodiment, the filter board 323 is arranged close to the battery input unit 331, which can achieve filtering at the power input source and eliminate problems such as noise coupling and parameter mismatch in traditional long-distance layout.

[0054] In some embodiments, the power module 330 further includes a power optimization unit 334. The power optimization unit 334 is disposed on one side of the battery input unit 331 in a second direction and is used to adjust the power distribution between the first inverter unit 332 and the second inverter unit 333. For example, the power optimization unit 334 dynamically adjusts the power output ratio of the inverter units according to the real-time status of the battery input unit 331, load requirements, and environmental conditions.

[0055] In the above embodiment, the power optimization unit 334 is disposed on one side of the battery input unit 331 in the second direction, away from the inverter unit. This avoids electromagnetic interference from the high-frequency signal of the inverter unit to the power optimization unit 334. Furthermore, since the inverter unit is the main heat source, displacing it away from the inverter unit also prevents the power optimization unit 334 from overheating.

[0056] In practical applications, there are two power optimization units 334, located on either side of the battery input unit 331. The traditional single power optimization unit 334 design carries a risk of single-point failure, potentially leading to uncontrolled power distribution in the system, causing inverter overload or battery input protection activation. This application's design of dual power optimization units 334 avoids this problem. Furthermore, the dual power optimization units 334 can be controlled independently, thereby improving distribution efficiency.

[0057] In some embodiments, the power optimization unit 334 is also provided with a third slot 343 on the side of the first direction away from the second inverter unit 332 for inserting the filter board 323.

[0058] In the above embodiment, the filter board 323 is also disposed on one side of the power optimization unit 334, so that it can form a CLC structure with the common mode inductor of the power optimization unit 334 to form electromagnetic shielding, thereby helping to suppress radiated interference.

[0059] In some embodiments, the power circuit board is provided with mounting slots 311, and there are multiple mounting slots 311, including at least one of a battery input slot 3111, a grid input slot 3112, and a solar input slot 3113, for mounting the corresponding interface. Installation via the mounting slots 311 is simple.

[0060] In some embodiments, the energy storage device further includes a battery module 400 and a battery management module 500.

[0061] The battery module 400 is disposed on the side of the power circuit board 310 facing the first housing 100 and is used to store electrical energy.

[0062] The battery management module 500 is located between the battery module 400 and the power circuit board 310, and is electrically connected to both the battery module 400 and the power module 300. The main function of the battery management module 500 is to provide comprehensive management of the battery module 400, including charge / discharge control, capacity estimation, balancing management, and fault diagnosis. For example, in charge / discharge control, the battery management module 500 precisely controls the charge / discharge current and voltage based on external load requirements and the current state of the battery module 400, preventing overcharging or over-discharging and extending battery life. The capacity estimation function accurately estimates the remaining capacity of the battery module 400 by real-time monitoring and analysis of parameters such as voltage, current, and temperature, providing users with reliable capacity information. The balancing management function ensures the consistency of capacity among the individual battery cells in the battery module 400, preventing performance degradation of the entire battery module 400 due to differences in the performance of individual battery cells. The fault diagnosis function can monitor the operating status of the battery module 400 in real time. Once an abnormality is detected, such as excessively high battery cell temperature or abnormal voltage, an alarm signal will be issued in a timely manner, and corresponding protective measures will be taken, such as cutting off the charging and discharging circuit, to prevent the fault from escalating further.

[0063] In practical applications, the power circuit board 310 also has a communication interface 312 on the side facing the battery management module 500 for connecting to the battery management module 500. Placing the communication interface 312 close to the battery management module 500 helps reduce the wiring length.

[0064] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0065] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0066] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: A first housing has a first surface, and a first opening is provided on the first surface; The second housing has a second surface and a heat sink. The second surface has a second opening, and the heat sink is disposed on the outer wall surface of the second housing. The second surface of the second housing and the first surface of the first housing are connected to each other to form a closed box. A power module, disposed within the housing, includes: A power circuit board, wherein a power module and multiple interface slots are provided on the power circuit board, and the plane on which the power circuit board is located is parallel to or has a preset angle with the second surface; the power module is disposed on the side of the power circuit board facing the second housing; Multiple functional circuit boards are inserted into the power circuit board through multiple interface slots, so that the power circuit board can extend the functions corresponding to the multiple functional circuit boards.

2. The energy storage device according to claim 1, characterized in that, The plane containing the multiple functional circuit boards is arranged perpendicularly to the plane containing the power circuit board, and / or the multiple functional circuit boards are located on the same side of the power circuit board where the power module is located.

3. The energy storage device according to claim 1, characterized in that, The power module includes: a battery input unit, a first inverter unit, and a second inverter unit; The first inverter unit is located in the middle region of the power circuit board and is used for DC-DC conversion; The battery input unit is located on one side of the first inverter unit in the first direction and is used to transmit electrical energy; The second inverter unit is located on the other side of the first inverter unit in the first direction and is used for DC-AC conversion.

4. The energy storage device according to claim 3, characterized in that, The plurality of said functional circuit boards include at least one of a main control board, a driver board, and a filter board; The main control board is used to control the operation of the power module; The drive board is used to convert control signals into drive power to drive the first inverter unit and the second inverter unit to work. The filter board is used to filter electrical energy.

5. The energy storage device according to claim 4, characterized in that, The interface slot includes a first slot; the first slot is disposed in a second direction on the side of the power circuit board where the first inverter unit and the second inverter unit are located, for inserting the main control board.

6. The energy storage device according to claim 4, characterized in that, The interface slot includes a second slot; the second slot is disposed on the power circuit board and close to the first inverter unit, and is used to insert the driver board.

7. The energy storage device according to claim 6, characterized in that, The drive board includes a first sub-board and a second sub-board. The first sub-board is disposed on the power circuit board and close to the first inverter unit, and the second sub-board is located on the side of the first sub-board away from the second inverter unit. The operating voltage of the first sub-board is greater than that of the second sub-board.

8. The energy storage device according to claim 4, characterized in that, The interface slot also includes a third slot, which is located on the side of the battery input unit opposite to the first inverter unit in a first direction, for inserting the filter board.

9. The energy storage device according to claim 8, characterized in that, The power module further includes a power optimization unit, which is disposed on one side of the battery input unit in a second direction and is used to adjust the power distribution between the first inverter unit and the second inverter unit.

10. The energy storage device according to claim 9, characterized in that, The power optimization unit has a third slot on the side opposite to the first inverter unit in the first direction for inserting the filter board.

11. The energy storage device according to claim 1, characterized in that, The power circuit board is provided with a mounting slot; There are multiple mounting slots, including at least one of a battery input slot, a power grid input slot, and a solar energy input slot.

12. The energy storage device according to claim 1, characterized in that, The energy storage device also includes a battery module and a battery management module; The battery module is disposed on the side of the power circuit board facing the first housing; The battery management module is disposed between the battery module and the power circuit board; The power circuit board also has a communication interface on the side facing the battery management module for connecting to the battery management module.

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