An integrated liquid-cooled box structure

Abstract

This utility model belongs to the technical field of energy storage battery pack lower enclosure, and in particular, an integrated liquid-cooled enclosure structure, comprising: a liquid-cooled upper plate; a liquid-cooled channel plate, the liquid-cooled channel plate being fixed to the bottom of the liquid-cooled upper plate, the liquid-cooled channel plate having multiple meandering channels for uniformly guiding fluid, an inlet connector with sealing performance installed at one end along the length direction of the liquid-cooled upper plate, and an outlet connector fixed to the side of the liquid-cooled upper plate symmetrical to the inlet connector; and multiple module crossbeams, the multiple module crossbeams being arranged sequentially at both ends and the center of the liquid-cooled upper plate, the liquid-cooled upper plate having profile crossbeams riveted to the bottom corresponding to the liquid-cooled channel plate, and vertical ribs fixed within the profile crossbeams for dispersing lateral stress during load-bearing. This utility model has a simple structure, effectively improves the integration of the energy storage pack lower enclosure, increases the battery pack volume utilization rate, improves assembly efficiency, reduces costs, and is convenient for users.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery pack lower housing technology, and in particular to an integrated liquid-cooled housing structure. Background Technology

[0002] Nationwide, new energy storage capacity is primarily based on electrochemical energy storage such as lithium-ion batteries, demonstrating a clear trend towards diversified development of new energy storage technologies. Looking at the technology share of newly installed capacity in 2024, lithium-ion battery energy storage technology accounted for 94.2%, maintaining its absolute dominant position. The growth rate of newly installed compressed air energy storage and flow battery energy storage technologies accelerated significantly. Furthermore, various other energy storage technologies, such as flywheel and sodium-ion batteries, have entered the engineering demonstration stage.

[0003] Lithium-ion battery energy storage thermal management technology is mainly divided into air cooling and liquid cooling;

[0004] 1. Air cooling: Air cooling dissipates heat through forced convection.

[0005] 2. Liquid cooling heat dissipation absorbs and removes heat by flowing a liquid medium (usually a solution of ethylene glycol and water) through the energy storage system.

[0006] Compared to air-cooled systems of the same capacity, liquid cooling systems do not require the design of air ducts, saving more than 50% of the floor space, making them more suitable for future large-scale energy storage power stations of hundreds of megawatts or more; due to the reduction in the use of mechanical components such as fans, the failure rate is lower; liquid cooling has low noise, saves system self-consumption power, and is environmentally friendly.

[0007] Therefore, we propose an integrated liquid-cooled housing structure to replace the existing air-cooled energy storage battery and aluminum extrusion profile lower housing. Utility Model Content

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An integrated liquid-cooled housing structure includes:

[0010] Liquid cooling upper plate;

[0011] A liquid-cooled runner plate is fixed to the bottom of the liquid-cooled upper plate. The liquid-cooled runner plate is provided with multiple meandering flow channels for uniformly guiding the fluid. An inlet connector with sealing performance and an outlet connector fixed on the side of the liquid-cooled upper plate symmetrical to the inlet connector are installed at one end along the length direction of the liquid-cooled upper plate.

[0012] The module crossbeams are configured in multiple ways, and the multiple module crossbeams are arranged sequentially at both ends and the center of the liquid-cooled upper plate.

[0013] Furthermore, the liquid-cooled upper plate is riveted to the bottom of the liquid-cooled runner plate with a profile beam and vertical ribs fixed in the profile beam to distribute the lateral stress during load-bearing.

[0014] Furthermore, the bottom of the profile beam is provided with multiple flow channel area reinforcing ribs and inlet / outlet area reinforcing ribs arranged sequentially along the length of the liquid cooling channel plate.

[0015] Furthermore, the multiple flow channel area reinforcing ribs are fixedly connected to the multiple inlet and outlet area reinforcing ribs respectively.

[0016] Furthermore, the liquid-cooled upper plate, liquid-cooled runner plate, module crossbeam, inlet connector, and outlet connector are all coated with an insulating layer, which can meet the insulation requirements between the battery module and the liquid-cooled upper plate.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] 1. This solution adopts a stamped brazed liquid cooling plate. Through a self-designed flow channel scheme, the temperature difference between modules is controlled. The load-bearing strength of the lower box is increased by using profile beams and reinforcing ribs, thereby realizing the integration and simplification of the lower box, improving the assembly efficiency of the battery pack, and reducing costs.

[0019] 2. This solution can reduce the volume of the battery pack, allowing the energy storage cabinet to install more battery packs and improve the volume utilization rate of the energy storage cabinet. At the same time, the brazed stamped liquid cooling plate can effectively reduce the temperature difference of the battery module and control it between 1-2℃, reducing the risk of thermal runaway of the module. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an integrated liquid-cooled box structure proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the liquid cooling channel plate of an integrated liquid cooling box structure proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the inlet connector of an integrated liquid-cooled box structure proposed in this utility model;

[0024] Figure 4This is a structural schematic diagram of the cross section of the profile beam of an integrated liquid-cooled box structure proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the reinforcing ribs in the flow channel area and the inlet / outlet area of ​​an integrated liquid-cooled box structure proposed in this utility model.

[0026] The correspondence between the numbers in the attached diagram is as follows:

[0027] 1. Liquid-cooled upper plate; 2. Liquid-cooled runner plate; 3. Module crossbeam; 4. Profile crossbeam; 401. Vertical rib; 5. Reinforcing rib in flow channel area; 501. Reinforcing rib in inlet and outlet area; 6. Inlet connector; 7. Outlet connector. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-5 An integrated liquid-cooled housing structure includes:

[0030] Liquid cooling upper plate 1;

[0031] The liquid cooling runner plate is fixed to the bottom of the liquid cooling upper plate 1. The liquid cooling runner plate is provided with multiple meandering flow channels for uniformly guiding the fluid. The flow channels can ensure that the flow resistance meets the requirements, the flow distribution is uniform, and the temperature difference between modules is controlled. An inlet connector 6 with sealing performance is installed at one end along the length direction of the liquid cooling upper plate 1, and an outlet connector 7 is fixed on the side of the liquid cooling upper plate 1 symmetrical to the inlet connector 6. The inlet connector 6 has sealing performance.

[0032] The module crossbeam 3 is configured in multiple ways, and the multiple module crossbeams 3 are arranged sequentially at both ends and the center of the liquid cooling upper plate 1.

[0033] In this embodiment, the liquid-cooled upper plate 1 is riveted to the bottom of the liquid-cooled channel plate 2 with a profile beam 4 and a vertical rib 401 fixed in the profile beam 4 to disperse the lateral stress when bearing the load. The vertical rib 401 can disperse the lateral stress when bearing the load and control the deformation of the battery pack after it is installed in the energy storage cabinet.

[0034] In this embodiment, the bottom of the profile beam 4 is provided with a plurality of flow channel area reinforcing ribs 5 and inlet / outlet area reinforcing ribs 501 arranged sequentially in the length direction of the liquid cooling channel plate.

[0035] In this embodiment, multiple flow channel reinforcing ribs 5 are fixedly connected to multiple inlet and outlet reinforcing ribs 501.

[0036] In this embodiment, the liquid-cooled upper plate 1, the liquid-cooled runner plate 2, the module crossbeam 3, the inlet connector 6, and the outlet connector 7 are all coated with an insulating layer.

[0037] The implementation principle of an integrated liquid-cooled housing structure in this application embodiment is as follows: the inlet connector 6, outlet connector 7, liquid-cooled upper plate 1, liquid-cooled channel plate 2, and module crossbeam 3 are brazed together and fixed to the lower housing of the energy storage battery pack. The stamped brazed liquid-cooled upper plate 1 uses multiple meandering flow channels to uniformly guide the fluid and control the temperature difference between modules. The profile crossbeam 4 and reinforcing ribs are used to increase the load-bearing strength of the lower housing. The vertical rib 401 can disperse the lateral stress during load-bearing and control the deformation of the battery pack after it is installed in the energy storage cabinet. This achieves the integration of the lower housing, reduces the overall volume of the battery pack, prevents the battery pack module temperature from becoming too high, controls the temperature difference between battery modules, and avoids affecting the battery life and causing single-point thermal runaway.

[0038] All structures in this application can be customized in terms of material and length according to actual usage. The attached drawings are schematic structural diagrams, and the actual dimensions can be adjusted accordingly.

[0039] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. An integrated liquid-cooled tank structure, characterized by, include: Liquid cooling upper plate; A liquid-cooled runner plate is fixed to the bottom of the liquid-cooled upper plate. The liquid-cooled runner plate is provided with multiple meandering flow channels for uniformly guiding the fluid. An inlet connector with sealing performance and an outlet connector fixed on the side of the liquid-cooled upper plate symmetrical to the inlet connector are installed at one end along the length direction of the liquid-cooled upper plate. The module crossbeams are configured in multiple ways, and the multiple module crossbeams are arranged sequentially at both ends and the center of the liquid-cooled upper plate.

2. The integrated liquid-cooled enclosure structure of claim 1, wherein, The liquid-cooled upper plate is riveted to the bottom of the liquid-cooled runner plate with a profile beam and vertical ribs fixed in the profile beam to distribute the lateral stress when bearing load.

3. The integrated liquid-cooled housing structure according to claim 2, characterized in that, The bottom of the profile beam is provided with multiple flow channel area reinforcing ribs and inlet / outlet area reinforcing ribs arranged sequentially along the length of the liquid cooling channel plate.

4. The integrated liquid-cooled housing structure according to claim 3, characterized in that, The multiple flow channel area reinforcing ribs are fixedly connected to the multiple inlet and outlet area reinforcing ribs, respectively.

5. The integrated liquid-cooled housing structure according to claim 1, characterized in that, The liquid-cooled upper plate, liquid-cooled runner plate, module crossbeam, inlet connector, and outlet connector are all coated with an insulating layer.

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