Liquid cooling system pipeline and battery pack lower box integrated structure and energy storage container

Abstract

The invention discloses a liquid cooling system pipeline and battery pack lower box body integrated structure and an energy storage container, the structure comprises a lower box body frame, the lower box body frame comprises a front beam main body and a plurality of side beams, and the front beam main body and the plurality of side beams are enclosed to form a frame structure; the liquid cooling pipeline system comprises a first-stage pipeline and a second-stage pipeline, the second-stage pipeline and the front beam body are integrated to form an integrated front beam, and the second-stage pipeline is of a transverse liquid supply structure and forms a single-branch transverse flow channel; an upper cavity and a lower cavity which are isolated from each other are formed in the integrated front beam, the upper cavity serves as a liquid return cavity, the lower cavity serves as a liquid outlet cavity, and cooling liquid transversely flows in the liquid outlet cavity and the liquid return cavity so as to cool a plurality of battery packs which are transversely arranged. According to the invention, deep integration of the liquid cooling pipeline system and the box body structure is realized, assembly is simplified, and reliability and space utilization rate are improved.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage equipment, specifically to an integrated structure of liquid cooling system piping and battery pack lower housing, and an energy storage container. Background Technology

[0002] With the rapid development of electrochemical energy storage technology, among various energy storage forms, containerized integrated energy storage systems have become the mainstream choice for the construction of large-scale energy storage power stations due to their outstanding advantages such as high standardization, short deployment cycle, flexible expansion and large single-unit capacity. They have been widely deployed in application scenarios such as grid peak and frequency regulation, new energy consumption and industrial and commercial energy storage.

[0003] During the charging and discharging process, the electrochemical reactions within the battery cell continuously generate heat. When the energy storage system is under high-rate charging / discharging conditions or at high ambient temperatures, the heat generation rate of the cell increases significantly. Studies show that the optimal operating temperature range for lithium-ion batteries is typically 20°C to 35°C. When the cell temperature exceeds this range, it not only leads to accelerated battery capacity decay and increased internal resistance, but in severe cases, it can also cause safety accidents such as thermal runaway. Therefore, an efficient and reliable thermal management system plays a crucial role in ensuring the safe and stable operation of the energy storage system, extending battery cycle life, and maintaining optimal charge and discharge performance.

[0004] Compared to traditional air-cooling solutions, liquid cooling technology is gradually becoming the preferred thermal management solution for medium and large-scale energy storage systems due to its advantages such as high heat exchange efficiency, good temperature uniformity, and low noise. The liquid cooling system uses a circulating coolant to remove the heat generated by the battery cells, which is then exchanged again by the liquid cooling unit before re-entering the circulation, thus achieving continuous cooling of the battery module.

[0005] Currently, energy storage containers generally adopt a multi-cluster parallel electrical architecture, with dozens or even hundreds of battery packs typically housed within a single container. Correspondingly, the liquid cooling system requires independent liquid cooling units and a complex piping network covering all battery packs. From a piping hierarchy perspective, a typical liquid cooling network generally employs a three-tier structure: the primary main pipe serves as the system's supply and return main, connecting the liquid cooling units to several rows of secondary main pipes arranged longitudinally along the container; each row of secondary main pipes is responsible for the distribution and collection of coolant for that row of battery packs; the secondary main pipes are then connected to the liquid cooling plates inside each battery pack via tertiary branch pipes, which directly supply and recover coolant to each individual battery pack.

[0006] In practical engineering applications, the aforementioned cooling pipes are mostly laid externally at the bottom or sides of containers. The pipe materials are primarily stainless steel, copper, or pressure-resistant flexible hoses, and the pipe sections are connected using quick-connect fittings, flanges, or welding. However, this traditional liquid-cooled piping layout has revealed several technical problems that urgently need to be addressed in practical applications: Firstly, the space utilization rate is low. Cooling pipes need to be laid independently, and a large number of supply and return liquid pipes and branch pipes occupy the internal space of the container. In particular, the bottom pipes are crisscrossed and the structure is complex, which limits the density of battery pack arrangement and is not conducive to improving volumetric energy density and system economy.

[0007] Secondly, on-site assembly is complex and costly. The liquid cooling pipelines need to be cut, bent, connected, fixed and tested on-site, which results in a long construction period and high technical requirements. The costs of materials, joints and labor are added, leading to a high overall construction cost.

[0008] Third, there are risks to operational reliability. Exposed pipelines are susceptible to impacts, vibrations and thermal stress during transportation, installation and operation, which may cause deformation or loosening of joints, increasing the risk of leakage, which in turn affects the heat dissipation effect and may cause electrical safety hazards.

[0009] Fourth, maintenance and repair are inconvenient. The integration of the liquid cooling pipeline with the battery system is low. When repairing or replacing the pipeline, the battery pack needs to be disassembled and reinstalled and debugged, which is cumbersome, time-consuming and labor-intensive, and is prone to introducing the risk of secondary failures.

[0010] Fifth, insufficient uniformity of thermal management, with temperature rise and pressure loss in the coolant transport along long pipelines, resulting in inconsistent cooling effects of battery packs at different locations. Long-term operation can exacerbate differences in cell performance, affecting system lifespan and energy efficiency.

[0011] In summary, existing liquid cooling solutions for energy storage containers have significant shortcomings in terms of structural integration, assembly efficiency, operational reliability, ease of maintenance, and uniformity of thermal management. Therefore, the industry urgently needs to develop an innovative design that deeply integrates the liquid cooling piping system with the battery enclosure structure to fundamentally address these technical pain points and drive the development of energy storage systems towards higher integration, lower cost, and superior performance. Summary of the Invention

[0012] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide an integrated structure of liquid cooling system pipeline and battery pack lower housing, as well as an energy storage container.

[0013] To achieve the above objectives, a first aspect of the present invention provides an integrated structure for a liquid cooling system piping and a battery pack lower housing, comprising a lower housing frame and a liquid cooling piping system. The lower housing frame includes a front beam body and several side beams, the front beam body and the side beams forming a frame structure. The liquid cooling piping system includes primary piping and secondary piping, wherein the secondary piping is integrally formed with the front beam body to form an integrated front beam, and the secondary piping adopts a transverse liquid supply structure and forms a single-branch transverse flow channel. The integrated front beam has an internally isolated upper cavity and a lower cavity, the upper cavity serving as a return liquid cavity and the lower cavity as a liquid outlet cavity. Coolant flows transversely within the return and outlet cavities to cool multiple battery packs arranged transversely.

[0014] Furthermore, the integrated front beam is equipped with a battery pack water inlet pipe connector and a battery pack water outlet pipe connector. The battery pack water inlet pipe connector communicates with the lower cavity, and the battery pack water outlet pipe connector communicates with the upper cavity. Both the battery pack water inlet pipe connector and the battery pack water outlet pipe connector are fixed to the integrated front beam by welding and are sealed and connected to the corresponding cavities. The welding connection method can ensure the reliability and sealing of the connection between the connector and the cavity, and prevent coolant leakage.

[0015] Furthermore, the integrated front beam is also equipped with adapter water pipe joints for connecting adjacent battery packs. These adapter water pipe joints include a first adapter water pipe joint communicating with the upper cavity and a second adapter water pipe joint communicating with the lower cavity. Adjacent battery packs are connected to each other via adapter water pipes and adapter water pipe joints to achieve series flow of coolant. The adapter water pipe joints enable series connection of liquid cooling circuits between multiple battery packs, simplifying the piping layout.

[0016] Furthermore, the integrated front beam is also equipped with a front beam water inlet connector and a front beam water outlet connector. The front beam water inlet connector communicates with the lower cavity, and the front beam water outlet connector communicates with the upper cavity. Both the front beam water inlet connector and the front beam water outlet connector are fixed to the integrated front beam by welding. Inside the battery pack, there is a liquid cooling plate located at the lower part of the lower housing frame. The liquid cooling plate is equipped with a liquid cooling plate water inlet connector and a liquid cooling plate water outlet connector. Inside the battery pack, there are also liquid cooling plate water inlet pipes and liquid cooling plate water outlet pipes. One end of the liquid cooling plate water inlet pipe is connected to the liquid cooling plate water inlet connector, and the other end is connected to the front beam water inlet connector. Through the above-mentioned connectors and pipes, the liquid cooling plate inside the battery pack can be easily connected to the liquid cooling cavity inside the integrated front beam, achieving direct cooling of the battery pack.

[0017] Furthermore, the integrated front beam is provided with several upper fixing holes for fixing the battery pack top cover and several lower fixing holes for fixing the battery pack bottom cover and liquid cooling plate. The battery pack can be detachably installed on the lower housing frame through the upper and lower fixing holes. This structural design makes the installation and removal of the battery pack more convenient, facilitating later maintenance and replacement.

[0018] Furthermore, battery pack zipper structures are also provided on both sides of the integrated front beam. These zipper structures are used to secure and release the battery pack during repairs. The zipper structure further improves the convenience of battery pack maintenance.

[0019] Furthermore, the main body of the integrated front beam is integrally formed from aluminum profiles, with an upper and lower cavity formed inside. The upper and lower cavities extend and connect along the length of the integrated front beam. The use of aluminum profiles not only provides excellent thermal conductivity but also facilitates processing and manufacturing, ensuring the sealing of the cavities and structural strength.

[0020] Furthermore, the primary piping includes a primary inlet pipe and a primary outlet pipe, both vertically installed within the container. The primary inlet pipe connects to the liquid cooler's outlet and the battery pack inlet connector located at the starting position of the battery pack via a connecting pipe. The primary outlet pipe connects to the liquid cooler's return port and the battery pack outlet connector located at the starting position of the battery pack via a connecting pipe. This vertical installation method further saves space at the bottom of the container and simplifies the piping layout.

[0021] Furthermore, a terminal water inlet plug and a terminal water return vent valve are installed on the integrated front beam of the tail battery pack at the end of the pipeline. The terminal water inlet plug is used to seal the end opening of the lower cavity, and the terminal water return vent valve is installed at the end of the upper cavity to discharge air from the liquid cooling pipeline. The vent valve ensures that the liquid cooling system can effectively discharge air from the pipeline after initial charging or maintenance, thus guaranteeing the cooling effect.

[0022] This invention also provides an energy storage container, including a container body, a liquid cooler, multiple battery packs, and an integrated structure of the aforementioned liquid cooling system piping and the lower container body of the battery packs. The liquid cooler is disposed within the container body, and the multiple battery packs are arranged laterally within the container body. Each battery pack contains a liquid cooling plate and a liquid cooling plate inlet pipe and a liquid cooling plate outlet pipe connected to the liquid cooling plate. The secondary piping is integrally formed with the front beam body to form an integrated front beam. The liquid cooler is connected to the integrated front beam of the battery pack at the starting position through the primary piping. The integrated front beams of adjacent battery packs are connected in series through transfer water pipes. The liquid cooling plate inlet pipe and liquid cooling plate outlet pipe of each battery pack are respectively connected to the front beam inlet connector and front beam outlet connector on the corresponding integrated front beam, forming a coolant circulation loop from the liquid cooler through the primary piping, secondary piping, and liquid cooling plate, and back to the liquid cooler.

[0023] Compared with the prior art, the present invention has the following advantages: Firstly, this invention fundamentally changes the traditional design concept of separating piping from the housing in liquid cooling systems by integrating the secondary piping with the main body of the front beam. The integrated front beam is manufactured using a one-piece aluminum profile molding process, allowing the return and outlet chambers to be formed within the same profile, significantly reducing the amount of material used for independent piping. The primary piping is installed vertically in conjunction with the horizontally arranged secondary piping, further simplifying the overall piping structure. The reduction in the types and quantities of materials not only lowers the direct cost of piping materials but also significantly reduces procurement management and process assembly costs.

[0024] Secondly, this invention employs a single-branch transverse flow channel design, with all joints pre-fixed to the integrated front beam via welding. On-site installation requires only simple pipe connections to assemble the liquid cooling system. The battery pack can be quickly positioned and installed on the lower housing frame via upper and lower fixing holes, and the adapter water pipe joints facilitate series connection between adjacent battery packs. Compared to traditional solutions that require extensive on-site pipe laying, fixing, and pressure holding, this invention's modular integrated design significantly improves assembly efficiency, shortens the construction cycle, and reduces the skill requirements for on-site personnel.

[0025] Thirdly, in this invention, the battery pack is detachably mounted on the lower housing frame via fixing holes. The battery pack's zipper structure allows for easy fixing and releasing when repair or replacement is required. The terminal return water vent valve on the rear battery pack facilitates the removal of air from the pipelines during initial system charging or maintenance. Since the secondary pipelines are integrated inside the front beam rather than externally laid, all liquid cooling pipelines do not require pre-installation. This allows for easy inspection or replacement of components without extensive disassembly during later maintenance. The standardized interface connection between each battery pack and the integrated front beam further improves component interchangeability and maintenance efficiency.

[0026] Fourth, the transverse liquid supply structure employed in this invention allows the coolant to flow laterally. Combined with the excellent thermal conductivity of aluminum profiles, this enables uniform cooling of multiple battery packs arranged laterally. Compared to traditional solutions where the coolant needs to flow through lengthy external pipes, this invention significantly shortens the coolant's flow path and reduces heat loss along the way by integrating the flow channel inside the front beam body. The liquid cooling plates of each battery pack are connected to the integrated front beam via short-distance pipes, resulting in more uniform cooling across the battery packs and significantly improved temperature consistency between cells. This enhances the energy efficiency of the energy storage system and extends battery cycle life.

[0027] Fifth, in this invention, all joints are welded to the integrated front beam for sealed connection, offering higher connection reliability and sealing performance compared to traditional threaded or clamp connections. The integrated design fundamentally reduces the number of pipe joints, lowering the risk of coolant leakage due to excessive joints. Since the secondary piping is fully integrated within the integrated front beam, the risk of damage to exposed piping due to impacts or vibrations during transportation, installation, or operation is avoided. The one-piece aluminum profile structure ensures the overall strength and pressure resistance of the cavity, while the terminal inlet plug and terminal return air valve ensure effective sealing and gas discharge at the pipe ends, resulting in higher reliability and safety for the liquid cooling system during long-term operation. Attached Figure Description

[0028] Figure 1 This is an assembly diagram of the lower housing of the battery pack according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the battery pack integrated front beam according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified structural diagram along the AA direction; Figure 4 for Figure 2 A magnified structural diagram along the BB direction; Figure 5 This is a structural diagram of the container liquid cooling pipeline according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point I; Figure 7 for Figure 5 Enlarged structural diagram at point II; In the diagram, 1-Battery pack top cover; 2.1-Liquid cooling plate inlet pipe; 2.2-Liquid cooling plate outlet pipe; 3-Battery pack zipper structure; 3.1-Battery pack outlet pipe connector; 3.2-First adapter pipe connector; 3.3-Battery pack inlet pipe connector; 3.4-Second adapter pipe connector; 4-Liquid cooling plate; 5-Battery pack bottom cover plate; 6.1-Liquid cooling plate inlet connector; 6.2-Liquid cooling plate outlet connector; 7.1-Upper fixing hole; 7.2-Lower fixing hole 8.1-Front beam water outlet connector; 8.2-Front beam water inlet connector; 8.3-Front beam body; 8.4-Side beam; 9-Upper cavity; 10-Lower cavity; 11-Liquid cooler; 12.1-First stage water inlet pipe; 12.2-First stage water outlet pipe; 13.1-First transfer water pipe; 13.2-Second transfer water pipe; 14.1-Third transfer water pipe; 14.2-Fourth transfer water pipe; 15-Terminal water inlet plug; 16-Terminal return water vent valve. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1 to 7 The battery pack includes a top cover 1 and a lower housing. The top cover 1 is positioned above the lower housing. The lower housing includes a lower housing frame, a liquid cooling plate 4, and a bottom protective plate 5. The liquid cooling plate 4 is located above the bottom protective plate 5. This embodiment of the invention provides an integrated structure for the liquid cooling system piping and the lower housing. This structure deeply integrates the front beam of the lower housing with the secondary liquid cooling piping, achieving a fusion design between the liquid cooling piping system and the housing structure.

[0031] Specifically, the integrated structure of this invention comprises two main parts: a lower housing frame and a liquid-cooled piping system. The lower housing frame includes a front beam body 8.3 and several side beams 8.4, which together form a frame structure. In this embodiment, the front beam body is integrated with the secondary piping to form an integrated front beam. The liquid-cooled piping system adopts a single-branch secondary piping flow channel lateral management method, forming a lateral liquid supply structure. The coolant flows laterally to cool the multiple horizontally arranged battery packs. Figure 2-4 As shown, the main body 8.3 of the integrated front beam is made of aluminum profile and manufactured integrally through extrusion molding. The aluminum profile has two isolated cavities: the upper cavity 9 serves as a return cavity to collect the high-temperature coolant flowing from the liquid cooling plates of each battery pack; the lower cavity 10 serves as an outlet cavity to supply low-temperature coolant to the liquid cooling plates of each battery pack. The upper cavity 9 and the lower cavity 10 extend along the length of the integrated front beam and are interconnected, forming a continuous flow channel. The integral molding design using aluminum profiles not only ensures the sealing and structural strength of the cavities, but also leverages the excellent thermal conductivity of aluminum to improve heat exchange efficiency. In this embodiment, the side beams 8.4 are preferably three in number, welded and fixed to the main body 8.3 of the front beam to form a square frame structure.

[0032] The integrated front beam is equipped with various types of connectors for connecting the components of the liquid cooling system. The battery pack inlet connector 3.3 connects to the lower cavity 10, and the battery pack outlet connector 3.1 connects to the upper cavity 9. These two connectors are used to connect the transfer water pipes between adjacent battery packs. The first transfer water pipe connector 3.2 and the second transfer water pipe connector 3.4 are used to connect the liquid cooling pipes in series between adjacent battery packs in the same row. The first transfer water pipe connector 3.2 connects to the upper cavity 9 as a return transfer connector, and the second transfer water pipe connector 3.4 connects to the lower cavity 10 as an inlet transfer connector. The front beam inlet connector 8.2 connects to the lower cavity 10, and the front beam outlet connector 8.1 connects to the upper cavity 9. The liquid cooling plate 4 is equipped with a liquid cooling plate inlet connector 6.1 and a liquid cooling plate outlet connector 6.2. The battery pack internally includes a liquid cooling plate inlet pipe 2.1 and a liquid cooling plate outlet pipe 2.2. One end of the liquid cooling plate inlet pipe 2.1 is connected to the liquid cooling plate inlet connector 6.1, and the other end is connected to the front beam inlet connector 8.2. One end of the liquid cooling plate outlet pipe 2.2 is connected to the liquid cooling plate outlet connector 6.2, and the other end is connected to the front beam outlet connector 8.1, thereby enabling coolant flow between the liquid cooling plate 4 and the integrated front beam. All the above connectors are fixed to the integrated front beam by welding and are sealed to the corresponding cavities to ensure reliable and airtight connections.

[0033] like Figure 1 As shown, the integrated front beam also has several upper fixing holes 7.1 and several lower fixing holes 7.2. The upper fixing holes 7.1 are used to fix the battery pack upper cover plate 1, and the lower fixing holes 7.2 are used to fix the battery pack bottom protective plate 5 and the liquid cooling plate 4. Through these fixing holes, the battery pack can be easily installed on the lower housing frame, and it also facilitates subsequent disassembly and maintenance. In addition, the integrated front beam also has battery pack zipper structures 3 on both sides. These zipper structures can fix and release the battery pack when it needs to be repaired, further improving the convenience of maintenance.

[0034] like Figure 5-7 As shown, the liquid cooling piping system in this embodiment also includes a primary piping system, which consists of a primary water inlet pipe 12.1 and a primary water outlet pipe 12.2. Both the primary water inlet pipe 12.1 and the primary water outlet pipe 12.2 are vertically installed inside the container, maximizing space utilization at the bottom of the container. The primary water inlet pipe 12.1 is connected via a second adapter pipe 13.2 to the liquid outlet of the liquid cooler 11 and the battery pack inlet pipe connector 3.3 of the initial battery pack (i.e., the first battery pack). The primary water outlet pipe 12.2 is connected via a first adapter pipe 13.1 to the liquid return port of the liquid cooler 11 and the battery pack outlet pipe connector 3.1 of the initial battery pack.

[0035] Adjacent battery packs are connected in series for water inlet and outlet via a third adapter water pipe 14.1 and a fourth adapter water pipe 14.2. Specifically, the third adapter water pipe 14.1 connects to the first adapter water pipe connector 3.2 on the integrated front beam of the adjacent battery pack for series connection of the return water pipeline; the fourth adapter water pipe 14.2 connects to the second adapter water pipe connector 3.4 on the integrated front beam of the adjacent battery pack for series connection of the inlet water pipeline. The coolant flows sequentially through the integrated front beam of each battery pack, finally reaching the tail battery pack. A terminal water inlet plug 15 and a terminal water outlet vent valve 16 are provided on the integrated front beam of the tail battery pack. The terminal water inlet plug 15 is used to seal the end opening of the lower cavity 10 to prevent coolant leakage. The terminal water outlet vent valve 16 is installed at the end of the upper cavity 9 to vent air from the pipeline after the initial charging or maintenance of the liquid cooling system, ensuring the normal operation of the liquid cooling system.

[0036] In actual operation, the coolant flows out from the liquid cooler 11, enters the lower cavity 10 (outlet cavity) of the integrated front beam of the battery pack at the starting position through the primary inlet pipe 12.1 and the second transfer pipe 13.2, and then enters the liquid cooling plate 4 inside the battery pack through the front beam inlet connector 8.2 and the liquid cooling plate inlet pipe 2.1, and then through the liquid cooling plate inlet connector 6.1 to cool the battery cells. After absorbing heat, the coolant enters the upper cavity 9 (return cavity) of the integrated front beam through the liquid cooling plate outlet connector 6.2, the liquid cooling plate outlet pipe 2.2 and the front beam outlet connector 8.1. The battery packs are connected in series through the first transfer pipe connector 3.2, the second transfer pipe connector 3.4 and the third transfer pipe 14.1 and the fourth transfer pipe 14.2. After the coolant flows through each battery pack in sequence, it finally returns to the liquid cooler 11 through the primary outlet pipe 12.2 and the first transfer pipe 13.1, completing a complete cooling cycle.

[0037] The present invention also provides an energy storage container, which includes a container body, a liquid cooler 11, multiple battery packs arranged laterally, and an integrated structure of the liquid cooling system piping and the lower body of the battery packs. Each battery pack is provided with a liquid cooling plate 4 and a liquid cooling plate inlet pipe 2.1 and a liquid cooling plate outlet pipe 2.2 connected to the liquid cooling plate 4. The liquid cooler 11 is connected to the integrated front beam of the battery pack at the starting position through a primary pipeline, and the integrated front beams of adjacent battery packs are connected in series through a third transfer water pipe 14.1 and a fourth transfer water pipe 14.2 to form a complete coolant circulation loop.

[0038] Compared to existing liquid cooling solutions that use independent piping networks, this invention significantly reduces the amount of piping material and the number of joints by integrating the secondary piping with the front beam body, simplifying the installation process and improving system reliability. Simultaneously, the shortened piping length helps improve the uniformity of cell temperature, thereby enhancing the overall performance and lifespan of the energy storage system.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. All other aspects not described in detail belong to the prior art.

Claims

1. An integrated structure for liquid cooling system piping and battery pack lower housing, characterized in that, include: The lower box frame includes a front beam main body and several side beams, which together form a frame structure. A liquid-cooled piping system, comprising primary piping and secondary piping, wherein the secondary piping is integrally formed with the front beam body to form an integrated front beam, and the secondary piping adopts a transverse liquid supply structure and forms a single branch transverse flow channel; The integrated front beam has an upper cavity and a lower cavity that are isolated from each other. The upper cavity serves as a return cavity and the lower cavity serves as an outlet cavity. The coolant flows laterally in the outlet cavity and the return cavity to cool the multiple battery packs arranged laterally.

2. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 1, characterized in that, The integrated front beam is equipped with a battery pack water inlet pipe connector and a battery pack water outlet pipe connector. The battery pack water inlet pipe connector is connected to the lower cavity, and the battery pack water outlet pipe connector is connected to the upper cavity. Both the battery pack water inlet pipe connector and the battery pack water outlet pipe connector are fixed to the integrated front beam and are sealed and connected to the corresponding cavities.

3. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 2, characterized in that, The integrated front beam is also provided with a transfer water pipe connector for connecting adjacent battery packs. The transfer water pipe connector includes a first transfer water pipe connector that communicates with the upper cavity and a second transfer water pipe connector that communicates with the lower cavity. Adjacent battery packs are connected to the transfer water pipe connector through transfer water pipes to achieve series flow of coolant.

4. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 3, characterized in that, The integrated front beam is also provided with a front beam water inlet connector and a front beam water outlet connector. The front beam water inlet connector is connected to the lower cavity, and the front beam water outlet connector is connected to the upper cavity. Both the front beam water inlet connector and the front beam water outlet connector are fixed to the integrated front beam. The battery pack contains a liquid cooling plate located at the lower part of the lower housing frame. The liquid cooling plate has a liquid cooling plate inlet connector and a liquid cooling plate outlet connector. The battery pack also contains a liquid cooling plate inlet pipe and a liquid cooling plate outlet pipe. One end of the liquid cooling plate inlet pipe is connected to the liquid cooling plate inlet connector, and the other end is connected to the front beam inlet connector. One end of the liquid cooling plate outlet pipe is connected to the liquid cooling plate outlet connector, and the other end is connected to the front beam outlet connector.

5. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 4, characterized in that, The integrated front beam is provided with several upper fixing holes for fixing the upper cover plate of the battery pack and several lower fixing holes for fixing the bottom protective plate and liquid cooling plate of the battery pack. The battery pack is detachably installed on the lower housing frame through the upper fixing holes and lower fixing holes.

6. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 5, characterized in that, The integrated front beam is also equipped with battery pack zipper structures on both sides, which are used to fix and release the battery pack during battery pack repair.

7. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 6, characterized in that, The integrated front beam is integrally formed from an aluminum profile, and the upper cavity and the lower cavity are formed inside the aluminum profile. The upper cavity and the lower cavity extend and connect along the length direction of the integrated front beam.

8. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to any one of claims 1-7, characterized in that, The primary pipeline includes a primary water inlet pipe and a primary water outlet pipe. Both the primary water inlet pipe and the primary water outlet pipe are arranged vertically inside the container. The primary water inlet pipe is connected to the liquid outlet of the liquid chiller and the battery pack water inlet pipe connector of the battery pack located at the starting position via a transfer water pipe. The primary water outlet pipe is connected to the liquid return port of the liquid chiller and the battery pack water outlet pipe connector of the battery pack located at the starting position via a transfer water pipe.

9. The integrated structure of the liquid cooling system piping and the lower casing of the battery pack according to claim 8, characterized in that, The integrated front beam of the tail battery pack located at the end of the pipeline is equipped with a terminal water inlet plug and a terminal water return vent valve. The terminal water inlet plug is used to seal the end opening of the lower cavity, and the terminal water return vent valve is installed at the end of the upper cavity and is used to discharge air from the liquid cooling pipeline.

10. An energy storage container, characterized in that, include: Container body; A liquid chiller is installed inside the container. Multiple battery packs are arranged laterally inside the container. Each battery pack is equipped with a liquid cooling plate and a liquid cooling plate inlet pipe and a liquid cooling plate outlet pipe connected to the liquid cooling plate. The liquid cooling system piping and battery pack lower housing integrated structure as described in any one of claims 1 to 9, wherein the secondary piping and the front beam body are integrally formed to form an integrated front beam, the liquid cooler is connected to the integrated front beam of the battery pack at the starting position through the primary piping, the integrated front beams of adjacent battery packs are connected in series through a transfer water pipe, and the liquid cooling plate inlet pipe and liquid cooling plate outlet pipe of the battery pack are respectively connected to the front beam inlet connector and front beam outlet connector on the corresponding integrated front beam, forming a coolant circulation loop from the liquid cooler through the primary piping, secondary piping, and liquid cooling plate back to the liquid cooler.

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