Liquid-cooled energy storage plug-in box

Abstract

The utility model relates to energy storage equipment technical field especially is related to the design of reinforcing the stability of energy storage equipment structure, a liquid cooling energy storage plug -in box, including lower box, box cover and battery module, the box cover is sealed buckle with lower box, and the containing cavity for assembling battery module is formed together, the upper surface of lower box is equipped with support front beam and support rear beam, battery module is installed on support front beam and support rear beam, and is fixed through long screw rod, still include support PC strip and heat conduction gel, support PC strip is fixed on the surface of lower box between support front beam and support rear beam, heat conduction gel is filled in the gap between battery module bottom and lower box upper surface, forms continuous heat conduction channel.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to the enhanced design for structural stability of energy storage equipment. Background Technology

[0002] Energy storage enclosures are a crucial component of energy storage systems. As energy storage systems evolve towards higher energy densities, traditional air cooling relies on external cold air exchanging heat with battery modules through ventilation holes in the enclosure. However, uneven distribution of cold air leads to significant temperature differences between battery modules, making it difficult to effectively meet the heat dissipation requirements of high power density scenarios. Cold plate liquid cooling requires customized design, incurs high initial costs, and carries risks of coolant leakage and supply chain dependence. While immersion liquid cooling achieves full immersion heat dissipation, it places extremely high demands on coolant insulation, material compatibility, and sealing technology, and this technology has not yet been commercialized on a large scale.

[0003] Chinese patent document CN114824628A discloses a liquid-cooled battery pack for energy storage. This design connects adjacent cells using thermally conductive adhesive, and provides pre-tightening force through the screw connections of the side plates and end plates, ensuring uniform stress on the cells. A bottom liquid-cooling channel directly cools the bottom of the cells, and the thermally conductive adhesive further enhances heat dissipation efficiency. The design of the maintenance cover and power port facilitates internal maintenance. However, this design has the following drawbacks: long-term exposure to gravity may cause deformation of the side plates, leading to collapse of the middle portion and affecting structural stability. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, a liquid-cooled energy storage box is provided, which can enhance the overall structural strength and ensure that the battery cells do not deform during long-term use.

[0005] This utility model is achieved through the following technical solution: a liquid-cooled energy storage box, including a lower box body, a box cover, and a battery module; the box cover and the lower box body are sealed and fastened together to form a cavity for assembling the battery module; the upper surface of the lower box body is provided with a front support beam and a rear support beam; the battery module is installed on the front support beam and the rear support beam and fixed by a long screw; it also includes a support PC strip and thermal conductive gel; the support PC strip is fixed to the surface of the lower box body between the front support beam and the rear support beam; the thermal conductive gel fills the gap between the bottom surface of the battery module and the upper surface of the lower box body to form a continuous heat conduction channel.

[0006] Supporting PC strips are installed at the bottom of the lower casing to fill the gap between the battery module and the casing, preventing the middle of the battery module from collapsing. Long screws are used to fix the battery module at the four corners, and together with the supporting front and rear beams, enhance the overall structural strength, ensuring that the battery cells within the module do not deform during long-term use. Thermally conductive gel is filled between the battery module and the lower casing to eliminate air gaps, forming a continuous heat conduction channel, significantly reducing thermal resistance and improving heat dissipation uniformity.

[0007] In a preferred embodiment of this utility model, the lower housing is provided with a water inlet and a water outlet at one end near the supporting front beam, and the water inlet and the water outlet are connected to an external liquid cooler through pipes.

[0008] In a preferred embodiment of this utility model, an insulating PC sheet is also included. The insulating PC sheet is a single piece of bent structure, which is attached to the upper surface of the battery module with adhesive and abuts against the inner wall of the box cover.

[0009] In a preferred embodiment of this utility model, the cover is provided with a power port and a maintenance port; a power cover plate assembly is detachably mounted on the power port, and a maintenance cover plate assembly is detachably mounted on the maintenance port.

[0010] In a preferred embodiment of the present invention, the power cover assembly includes a negative output connector, a positive output connector, and a manual maintenance switch; one end of the manual maintenance switch is connected to the negative terminal of the battery module and the negative output connector via a flexible copper busbar, and the other end of the manual maintenance switch is connected to the positive terminal of the battery module and the positive output connector via a flexible copper busbar.

[0011] In a preferred embodiment of the present invention, the maintenance cover assembly includes a maintenance cover and a communication connector, a fire nozzle, and an explosion-proof valve mounted on the maintenance cover.

[0012] In a preferred embodiment of this utility model, a battery management system is provided at one end of the lower housing near the front support beam, which is used to connect the data acquisition port and communication connector of the battery module.

[0013] In a preferred embodiment of this utility model, a silicone sealing ring is provided at the connection between the box cover and the lower box body, and a reinforcing rib is provided on the upper surface of the box cover.

[0014] In a preferred embodiment of this utility model, multiple lifting plates are provided on the edge of the upper surface of the lower housing.

[0015] In a preferred embodiment of this utility model, the fire nozzle is provided with an interface for connecting to an external fire protection system.

[0016] This utility model is achieved through the following technical solution:

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A liquid-cooled energy storage box prevents the middle of the battery cell from collapsing by supporting PC strips and eliminates air gaps by thermally conductive gel. The combination of the two improves structural strength and heat dissipation uniformity. The long screw fixing method simplifies the assembly process and reduces manufacturing costs.

[0019] Furthermore, the opening of the water inlet and outlet shortens the coolant flow distance, reduces pressure loss, and improves the heat exchange efficiency of the liquid cooling system; the opening is located at one end near the supporting front beam, which simplifies the connection with external pipelines and reduces the risk of leakage.

[0020] Furthermore, the monolithic structure of the insulating PC sheet avoids gaps between multiple insulating sheets, improving insulation reliability; the adhesive backing simplifies the installation process, reduces human error, and ensures high-voltage safety.

[0021] Furthermore, the modular design of the power and maintenance covers enables quick localized maintenance without the need to disassemble the entire enclosure, thus shortening maintenance time; the separate design of the power and maintenance ports avoids operational interference and improves safety.

[0022] Furthermore, the manual maintenance switch (MSD) is integrated into the power cover, which can quickly disconnect the electrical connection between the battery pack and the system during maintenance, preventing short circuits or electric shock risks caused by misoperation; the flexible copper busbar connection adapts to vibration environments and ensures long-term reliability.

[0023] Furthermore, the all-in-one design reduces the number of openings in the enclosure cover, improving sealing; the fire nozzles can quickly respond to thermal runaway when connected to external systems, and the explosion-proof valve automatically releases pressure to prevent the enclosure from bursting, comprehensively enhancing the level of safety protection.

[0024] Furthermore, the battery management system (BMS) is deployed nearby to reduce signal transmission loss and monitor cell voltage and temperature data in real time; external communication connectors enable data interaction with the upper-level system, supporting remote monitoring and fault early warning.

[0025] Furthermore, the silicone sealing ring ensures the airtightness of the enclosure, ensuring that the dustproof and waterproof ratings of the energy storage box meet the standards, preventing coolant leakage or the entry of external contaminants; the reinforcing ribs enhance the deformation resistance of the enclosure cover, adapt to high-temperature or vibration environments, and extend its service life.

[0026] Furthermore, the design of the lifting platform conforms to industry-standard specifications, facilitating forklift or lifting equipment operation, simplifying the installation and replacement process of battery boxes in the cabinet, and improving operation and maintenance efficiency.

[0027] Furthermore, the standardized interface design ensures rapid response of the fire protection system and suppresses the spread of thermal runaway; it is compatible with mainstream fire protection protocols, reduces the difficulty of system integration, and improves overall safety.

[0028] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] Figure 1 An exploded view of the overall structure of the novel liquid-cooled energy storage plug box;

[0031] Figure 2 This is a schematic diagram of the lower casing of the new liquid-cooled energy storage plug box;

[0032] Figure 3 A schematic diagram of the cover of a new type of liquid-cooled energy storage tank;

[0033] Figure 4 This is a front view of the new liquid-cooled energy storage plug box.

[0034] The annotations in the attached figures are explained as follows:

[0035] 1. Lower housing, 2. Housing cover, 3. Battery module, 4. Insulating PC sheet, 5. Maintenance cover assembly, 6. Power cover assembly, 7. Battery management system, 8. Lifting plate, 9. Supporting PC strip, 101. Water inlet, 102. Water outlet, 103. Fixing plate, 104. Supporting front beam, 105. Supporting rear beam, 106. Insert box mounting screw holes, 201. Power port, 202. Maintenance port, 203. Reinforcing rib, 501. Maintenance cover, 502. Communication connector, 503. Fire nozzle, 504. Explosion-proof valve, 601. Power cover, 602. Negative output connector, 603. Positive output connector, 604. Manual maintenance switch. Detailed Implementation

[0036] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0037] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] like Figures 1 to 4 As shown, Figure 1 As shown, a liquid-cooled energy storage box includes a lower box body 1, a box cover 2, and a battery module 3; the box cover 2 and the lower box body 1 are sealed and fastened together to form a receiving cavity for assembling the battery module 3.

[0039] The lower housing 1 is primarily made of aluminum. Its structure includes a rectangular aluminum plate serving as the base, an integrated internal liquid cooling channel, and reinforcing beams located at the bottom and sides. The internal liquid cooling channel is integrally formed with the upper plate of the lower housing 1 by brazing. The lower housing 1, made of aluminum, has a low density, effectively reducing overall weight, achieving a lightweight design, and increasing the energy density of the energy storage system. The brazing process enhances the structural strength of the aluminum plate through high-temperature welding, reducing the risk of leakage. The reinforcing beams at the bottom further increase the overall structural strength of the lower housing 1. A front support beam 104 and a rear support beam 105 protrude and are fixed to the upper surface of the lower housing 1 for the installation and fixation of the battery module 3.

[0040] The lower housing 1 is equipped with a coolant inlet 101 and an outlet 102 at the front. The inlet 101 and outlet 102 are connected to the external liquid cooling unit through pipes to circulate the coolant and remove the heat generated by the battery module 3, thereby controlling the internal temperature of the energy storage box and improving heat dissipation efficiency.

[0041] Furthermore, the lower housing 1 has mounting screw holes 106 on both sides of the front, which are used to fix the energy storage plug box inside the industrial and commercial integrated cabinet or energy storage container.

[0042] The battery module 3 is mounted on the front support beam 104 and the rear support beam 105 of the lower housing 1, and is fixed at its four corners by four long screws. A support PC strip 9 is fixedly attached to the upper surface of the lower housing 1 in the area between the front support beam 104 and the rear support beam 105. The support PC strip 9 provides support for the middle area of ​​the battery module 3, preventing the battery module 3 from collapsing in the middle due to its large span. Furthermore, the gap between the battery module 3 and the lower housing 1 is filled with thermally conductive gel. The soft texture of the thermally conductive gel allows it to adhere tightly to uneven surfaces, eliminating air gaps and forming a continuous heat conduction channel, significantly reducing thermal resistance. After the thermally conductive gel cures, the battery module 3 can also be disassembled for convenient future maintenance.

[0043] A single, bent insulating PC sheet 4 is used to insulate the upper surface of the battery module 3. Adhesive is applied to the side of the insulating PC sheet 4 facing the battery module 3, allowing it to adhere and secure to the upper surface of the battery module 3. The bent edges of the insulating PC sheet 4 extend to the side of the battery module 3 and abut against the inner wall of the cover 2. The single-piece insulating PC sheet 4 adheres easily to the battery module 3, making installation more convenient.

[0044] The lid 2 is grooved, and the flanges around it are sealed with silicone sealing rings to the lower box body 1 and are fixedly connected by bolts. The upper surface of the lid 2 is stamped with reinforcing ribs 203, which increase the structural strength of the lid 2.

[0045] The front of the cover 2 has a power port 201 and a maintenance port 202. The power cover assembly 6 and the maintenance cover assembly 5 are respectively mounted on the power port 201 and the maintenance port 202, both sealed with silicone sealing rings and fixed with bolts, allowing internal maintenance without opening the cover 2. In addition, the sealing rings also provide good airtightness for the liquid-cooled energy storage battery box.

[0046] The power cover assembly 6 includes a power cover 601, a negative output connector 602, a positive output connector 603, and a manual maintenance switch (MSD) 604; the negative output connector 602, the positive output connector 603, and the manual maintenance switch (MSD) 604 are fixed to the corresponding openings of the power cover 601 by bolts.

[0047] The terminal of the negative output connector 602 is connected to one end of the manual maintenance switch (MSD) 604 via a flexible copper busbar, and the terminal is also connected to the negative terminal of the battery module 3 via a flexible copper busbar; the other end of the manual maintenance switch (MSD) 604 is connected to the positive terminal of the battery module 3 and the positive output connector 603 via a flexible copper busbar.

[0048] The purpose of the manual maintenance switch (MSD) 604 is to safely disconnect the electrical connection of the battery compartment during maintenance, repair or transportation, avoid the risk of accidental power supply or short circuit, facilitate the quick replacement or isolation of faulty battery modules, simplify the connection and management of the battery compartment and the overall system, and improve installation and maintenance efficiency.

[0049] The maintenance cover assembly 5 includes a maintenance cover 501, a communication connector 502, a fire nozzle 503, and an explosion-proof valve 504. The communication connector 502, fire nozzle 503, and explosion-proof valve 504 are fixed to the corresponding openings in the maintenance cover 501 by bolts. The communication connector 502 connects to the communication port of the internal battery management system (BMS) 7, and the fire nozzle 503 connects to the external fire protection system. The external interface of the fire nozzle allows for quick connection to the fire protection system, improving assembly efficiency.

[0050] The battery management system (BMS) 7 is installed at one end of the lower housing 1 near the front support beam 104 and is fixed to the studs provided on the lower housing 1 using a loosening nut. The acquisition port of the battery module 3 is connected to the port of the battery management system (BMS) 7 and establishes communication with external devices through the communication connector 502.

[0051] Multiple lifting plates 8 are provided on the edge of the upper surface of the lower enclosure 1, providing standardized lifting interfaces for lifting; facilitating forklift or lifting equipment operation, simplifying the installation and replacement process of battery packs in the cabinet, and improving operation and maintenance efficiency.

[0052] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A liquid-cooled energy storage box, comprising a lower box body (1), a box cover (2), and a battery module (3); wherein the box cover (2) is sealed and fastened to the lower box body (1) to form a receiving cavity for assembling the battery module (3); characterized in that: The upper surface of the lower housing (1) is provided with a front support beam (104) and a rear support beam (105); the battery module (3) is installed on the front support beam (104) and the rear support beam (105) and fixed by a long screw; it also includes a support PC strip (9) and thermal conductive gel; the support PC strip (9) is fixed on the surface of the lower housing (1) between the front support beam (104) and the rear support beam (105); the thermal conductive gel fills the gap between the bottom surface of the battery module (3) and the upper surface of the lower housing (1) to form a continuous heat conduction channel.

2. The liquid-cooled energy storage box according to claim 1, characterized in that, The lower housing (1) is provided with a water inlet (101) and a water outlet (102) at one end near the supporting front beam (104), and the water inlet (101) and the water outlet (102) are connected to the external liquid cooler through pipes.

3. The liquid-cooled energy storage box according to claim 1, characterized in that, It also includes an insulating PC sheet (4), which is a whole piece bent structure, and is attached to the upper surface of the battery module (3) by adhesive backing, and abuts against the inner wall of the box cover (2).

4. The liquid-cooled energy storage box according to claim 1, characterized in that, The cover (2) is provided with a power port (201) and a maintenance port (202); the power port (201) is detachably equipped with a power cover plate assembly (6), and the maintenance port (202) is detachably equipped with a maintenance cover plate assembly (5).

5. A liquid-cooled energy storage plug-in according to claim 4, characterized in that, The power cover assembly (6) includes a negative output connector (602), a positive output connector (603), and a manual maintenance switch (604); one end of the manual maintenance switch (604) is connected to the negative terminal of the battery module (3) and the negative output connector (602) via a flexible copper busbar, and the other end of the manual maintenance switch (604) is connected to the positive terminal of the battery module (3) and the positive output connector (603) via a flexible copper busbar.

6. A liquid-cooled energy storage plug-in according to claim 4, characterized in that, The maintenance cover assembly (5) includes a maintenance cover (501) and a communication connector (502), a fire nozzle (503), and an explosion-proof valve (504) mounted on the maintenance cover (501).

7. A liquid-cooled energy storage plug-in according to claim 6, characterized in that, The lower housing (1) is equipped with a battery management system (7) at one end near the front support beam (104), which is used to connect the acquisition port of the battery module (3) and the communication connector (502).

8. A liquid-cooled energy storage plug-in according to claim 1, characterized in that, A silicone sealing ring is provided at the connection between the box cover (2) and the lower box body (1), and a reinforcing rib (203) is provided on the upper surface of the box cover (2).

9. A liquid-cooled energy storage box according to claim 1, characterized in that, The lower housing (1) has multiple lifting plates (8) on the edge of its upper surface.

10. A liquid-cooled energy storage plug-in according to claim 6, characterized in that, The fire nozzle (503) is provided with an interface for connecting to an external fire protection system.

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