Flameproof lithium battery energy storage device and power generation system based on wind-solar complementary power generation

Abstract

The application relates to a flame-proof lithium battery energy storage device based on wind-solar complementary power generation and a power generation system, belonging to the new energy storage equipment and explosion-proof safety technical field.The device comprises a shell assembly which is flame-proof as a whole, a lithium battery group arranged in the shell assembly and a BMS battery manager arranged on the lithium battery group.The shell assembly comprises a battery cavity, a battery cavity cover, a terminal cavity and a terminal cover.A wind-solar complementary controller is fixed in the terminal cavity, the wind-solar complementary controller is electrically connected with the BMS battery manager, and a plurality of explosion-proof power supply interfaces which are in communication with the terminal cavity are fixed on the terminal cover.The device solves the problems of the existing outdoor energy storage device, such as insufficient safety, low heat dissipation efficiency and poor integration in a flammable and explosive environment, can place the unsafe lithium battery energy carrier in a safe flame-proof shell, realizes seamless connection with the wind-solar complementary power generation system, and is especially suitable for off-grid power supply in dangerous environments such as gas, oil, chemical industry and mine.

Description

Technical Field

[0001] This utility model relates to the field of new energy storage equipment and explosion-proof safety technology, and in particular to an explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation and a wind-solar hybrid power generation system having the explosion-proof lithium battery energy storage device. Background Technology

[0002] In hazardous operating environments such as gas, oil, chemical, coal mining, and pipeline transportation, as well as in scenarios like security monitoring and communication relay in remote areas, there is an urgent need for stable and reliable off-grid power sources. Wind-solar hybrid power generation is an ideal solution. However, conventional energy storage lithium battery packs pose a risk of fire and explosion when overcharged, over-discharged, or internally short-circuited. If placed directly in hazardous areas, they become a significant safety hazard. Currently, the common practice is to place ordinary energy storage devices in safe areas and draw power to hazardous areas through explosion-proof junction boxes. This method results in high line losses and costs. Although increased safety or positive pressure protection schemes exist, they suffer from drawbacks such as complex structures, the need for continuous protection of the gas supply, and high maintenance costs. Therefore, there is an urgent need for a highly integrated, intrinsically safe energy storage power device that can be directly placed in Zone 0 or Zone 1 hazardous environments. Utility Model Content

[0003] The purpose of this application is to provide an explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation and a wind-solar hybrid power generation system incorporating the explosion-proof lithium battery energy storage device. The standard explosion-proof battery box is structurally optimized by incorporating a modular internal installation structure to efficiently integrate the lithium battery pack, wind-solar hybrid controller, and BMS battery manager within different explosion-proof chambers. Safe connection to external wind and solar power generation equipment is achieved through an explosion-proof multi-core aviation connector. This invention solves the problems of insufficient safety, low heat dissipation efficiency, and poor integration of existing outdoor energy storage devices in flammable and explosive environments. It places the unsafe lithium battery energy carrier within a safe explosion-proof enclosure, achieving seamless integration with the wind-solar hybrid power generation system. It is particularly suitable for off-grid power supply in hazardous environments such as gas, oil, chemical, and mining industries.

[0004] To achieve the above objectives, this utility model provides an explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation, comprising an explosion-proof housing assembly, a lithium battery pack disposed inside the housing assembly, and a BMS battery manager disposed on the lithium battery pack. The housing assembly includes a battery cavity, a battery cavity cover, a terminal cavity, and a terminal cover. The lithium battery pack is fixed in the battery cavity, the BMS battery manager is fixed to the top of the lithium battery pack, the battery cavity cover is closed to the top of the battery cavity to form a first explosion-proof surface, the terminal cavity is integrally formed to the top of the battery cavity cover, and the terminal cover is closed to the top of the terminal cavity to form a second explosion-proof surface. The battery cavity cover has several through holes connecting the battery cavity and the terminal cavity, and explosion-proof terminals are fixed in each of the through holes. A wind-solar hybrid controller (MPPT) is fixed in the terminal cavity, and several explosion-proof power interfaces connected to the terminal cavity are fixed on the terminal cover. The wind-solar hybrid controller is electrically connected to the BMS battery manager and the explosion-proof power interfaces respectively.

[0005] In order to improve the charging speed and isolate each wind-solar hybrid controller to ensure safety, in a preferred embodiment of the present invention, the top of the battery cavity cover is provided with two or more terminal cavities.

[0006] To facilitate the assembly and disassembly of the battery cavity and the battery cavity cover, the battery cavity is a cylindrical structure with a flange welded to its top outer wall, and the battery cavity cover is detachably connected to the flange by a number of first screws.

[0007] To ensure the sealing performance of the first explosion-proof surface, a first annular groove is formed between the top of the housing assembly and the flange, and a second annular groove is provided at the bottom of the battery cavity cover. A first sealing ring is provided between the first annular groove and the second annular groove.

[0008] To facilitate the assembly and disassembly of the terminal cavity and the terminal cover, the terminal cavity is a cylindrical structure with an end plate welded to its top. The terminal cover is detachably connected to the end plate by several second screws.

[0009] To ensure the sealing of the second explosion-proof surface, a second sealing ring is provided between the terminal cover and the end plate.

[0010] To facilitate the assembly and disassembly of the lithium battery pack, an insulating plate is fixed to the bottom of the battery cavity, and the lithium battery pack is fixed to the insulating plate by a pull rod and a pressure plate.

[0011] To facilitate the switching on and off of the entire device, a DC air switch is fixed at the bottom of the battery compartment cover, and a handle connected to the DC air switch is provided at the top of the battery compartment cover.

[0012] This utility model also provides a wind-solar hybrid power generation system, which has the above-mentioned explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation.

[0013] Compared with existing technologies, this design has the following advantages: (1) Intrinsic safety: By using the highest level of explosion protection, "explosion isolation", the safety bottleneck of lithium batteries in hazardous environments is fundamentally solved; (2) High integration: It integrates power generation, energy storage and power consumption management into one compact structure, reducing external wiring and fault points; (3) Strong environmental adaptability: The robust explosion-proof shell and efficient heat dissipation design enable it to withstand various harsh outdoor industrial environments; (4) Easy maintenance: The modular design makes it easy and quick to replace the battery module or controller. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of one direction of the explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation of this utility model. Figure 2 This is a cross-sectional view of the explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to this utility model from another direction. Figure 3 This is a schematic diagram of the power generation system of this utility model. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0016] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Example 1: like Figure 1 , Figure 2 The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation shown includes an explosion-proof housing assembly, a lithium battery pack 14 disposed inside the housing assembly, and a BMS battery manager 18 disposed on the lithium battery pack 14, wherein the BMS battery manager 18 is electrically connected to the lithium battery pack 14. Specifically, the housing assembly includes a battery cavity 1, a battery cavity cover 2, a terminal cavity 3, and a terminal cover 4; The battery cavity 1 has a cylindrical structure with dense heat dissipation fins cast on the outer wall. It is hollow inside and has a bottom plate. A flange 5 is welded to the outer wall of the top. The battery cavity cover 2 covers the top of the battery cavity 1 to form a first explosion-proof surface. The outer circumference of the battery cavity cover 2 is detachably connected to the flange 5 by several first screws 7. A first annular groove is formed between the top of the battery cavity 1 and the flange 5. A second annular groove is provided at the bottom of the battery cavity cover 2. A first sealing ring 6 is provided between the first annular groove and the second annular groove to ensure the sealing performance of the first explosion-proof surface. In addition, a DC air switch 15 is fixed at the bottom of the battery cavity cover 2. A handle 16 connected to the DC air switch 15 is provided at the top of the battery cavity cover 2. Driving the handle 16 can control the on / off state of the entire device. The lithium battery pack 14 is disposed inside the battery cavity 1. An insulating plate 11 is fixed at the bottom of the battery cavity 1. The lithium battery pack 14 is fixed to the insulating plate 11 by several pull rods 12 and pressure plates 17. The pull rods 12 are covered with insulating tubes 13. The pressure plates 17 are locked to the pull rods 12 by bolts and insulating pads, realizing the modular installation of the lithium battery pack 14, improving shock resistance, and facilitating maintenance and replacement. The BMS battery manager 18 is fixed to the top of the lithium battery pack 14 and electrically connected to it. The terminal cavity 3 serves as a wiring compartment and is integrally formed on the top of the battery cavity cover 2. There are two terminal cavities 3, symmetrically arranged. Each terminal cavity 3 has a cylindrical structure, with an end plate 8 welded to its top. The terminal cover 4 covers the end plate 8, forming a second explosion-proof surface. The terminal cover 4 is detachably connected to the end plate 8 by several second screws 10. A second sealing ring 9 at the joint between the terminal cover 4 and the end plate 8 ensures the sealing performance of the second explosion-proof surface. A wind-solar hybrid controller 20 is respectively installed inside each of the two terminal cavities 3. Several connecting... The battery cavity 1 and the terminal cavity 3 have through holes, and each through hole is fixed with an explosion-proof terminal 19. The wind-solar hybrid controller 20 is electrically connected to the BMS battery manager 18 via the explosion-proof terminal 19. The terminal cover 4 is fixed with several explosion-proof power interfaces 21 that are connected to the terminal cavity 3. The explosion-proof power interface 21 is an explosion-proof multi-core aviation plug with no less than four cores, which are used to connect the positive and negative terminals of the solar energy, the positive and negative terminals of the wind turbine, and the positive and negative terminals of the DC load output, respectively. The wind-solar hybrid controller 20 is electrically connected to the explosion-proof power interface 21.

[0018] The housing assembly of this utility model is made of high-strength aluminum alloy casting, possessing excellent mechanical strength and heat dissipation performance. The width, gap, and surface finish of the explosion-proof surface strictly comply with GB3836.2 standard. The lithium battery pack uses lithium iron phosphate cells connected in series for higher safety, with a nominal voltage of 48V. The BMS battery manager has complete functions such as overcharge, over-discharge, overcurrent, short circuit, and temperature protection, and communicates with the wind-solar hybrid controller via an RS485 interface to achieve intelligent charge and discharge management. The wind-solar hybrid controller supports MPPT charging, efficiently receiving and converting electrical energy generated by solar panels and wind turbines to charge the lithium battery pack. All external cables are introduced into and exited the enclosure via explosion-proof aviation connectors.

[0019] Example 2: This embodiment provides a wind-solar hybrid power generation system, which includes the aforementioned explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation, combined with... Figure 3 As shown, the solar photovoltaic panels or wind turbines of the power generation system are connected to the BMS battery manager of the explosion-proof lithium battery energy storage device through a wind-solar hybrid controller to achieve charging or discharging. The lithium battery pack is connected to the load equipment to achieve discharging.

[0020] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, principle and application direction of this application should be covered within the scope of protection of this application.

Claims

1. An explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation, comprising an explosion-proof housing assembly, a lithium battery pack disposed inside the housing assembly, and a BMS battery manager disposed on the lithium battery pack, characterized in that: The housing assembly includes a battery cavity, a battery cavity cover, a terminal cavity, and a terminal cover. The lithium battery pack is fixed in the battery cavity, and the BMS battery manager is fixed to the top of the lithium battery pack. The battery cavity cover is fitted onto the top of the battery cavity to form a first explosion-proof surface. The terminal cavity is integrally formed on the top of the battery cavity cover, and the terminal cover is fitted onto the top of the terminal cavity to form a second explosion-proof surface. The battery cavity cover has several through holes connecting the battery cavity and the terminal cavity, and explosion-proof terminals are fixed in each of the through holes. A wind-solar hybrid controller is fixed in the terminal cavity. Several explosion-proof power interfaces connected to the terminal cavity are fixed on the terminal cover. The wind-solar hybrid controller is electrically connected to the BMS battery manager and the explosion-proof power interfaces, respectively.

2. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 1, characterized in that: The top of the battery compartment cover has two terminal cavities.

3. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 2, characterized in that: The battery cavity is a cylindrical structure with a flange welded to its top outer wall. The battery cavity cover is detachably connected to the flange by several first screws.

4. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 3, characterized in that: A first annular groove is formed between the top of the housing assembly and the flange, and a second annular groove is provided at the bottom of the battery cavity cover. A first sealing ring is provided between the first annular groove and the second annular groove.

5. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 2, characterized in that: The terminal cavity is a cylindrical structure with an end plate welded to its top. The terminal cover is detachably connected to the end plate by several second screws.

6. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 5, characterized in that: A second sealing ring is provided between the terminal cover and the end plate.

7. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 2, characterized in that: An insulating plate is fixed to the bottom of the battery cavity, and the lithium battery pack is fixed to the insulating plate by a pull rod and a pressure plate.

8. The explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation according to claim 2, characterized in that: A DC air switch is fixed at the bottom of the battery compartment cover, and a handle connected to the DC air switch is provided at the top of the battery compartment cover.

9. A power generation system, characterized in that: The power generation system has an explosion-proof lithium battery energy storage device based on wind-solar hybrid power generation as described in any one of claims 1-8.

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