Liquid-cooled energy storage battery pack

Abstract

The application belongs to the technical field of new energy, and particularly relates to a liquid-cooled energy storage battery pack, which comprises a liquid-cooled plate, a bottom frame, a battery module and an upper cover; wherein the bottom frame is fixedly connected to the periphery of the liquid-cooled plate; the battery module is arranged on the top of the liquid-cooled plate and supported by the bottom frame; and the upper cover is used for covering the battery module and detachably connected with the bottom frame. The battery module is supported and fixed by the bottom frame, the liquid-cooled plate is attached to the bottom of the battery module and fixed on the bottom frame, which is equivalent to that the liquid-cooled plate is embedded in the bottom frame, thereby saving the internal space, improving the space utilization, making the compactness of the structure more compact, being beneficial to improving the energy density, and the bottom surface of the liquid-cooled plate being exposed is more beneficial to heat dissipation, and even if the liquid-cooled plate is damaged and leaks due to external force, the liquid can flow out in time, reducing the probability of contact with the battery module and being beneficial to reducing the safety risk.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, specifically relating to a liquid-cooled energy storage battery pack. Background Technology

[0002] As the carrier for realizing the functions of energy storage system, the energy storage battery pack generates a lot of heat during charging and discharging. Traditional air cooling cannot cool it down quickly, resulting in serious heat accumulation in the battery, which affects the battery performance and reduces its service life.

[0003] To meet the heat dissipation requirements of energy storage battery packs, liquid cooling plates are currently used. These plates are installed in the lower housing at the bottom of the battery modules and have inlet and outlet ports for liquid cooling. However, liquid cooling plates occupy a large amount of space in the lower housing, resulting in low space utilization and insufficient structural compactness. This limits the number or size of modules, making it difficult to further improve the energy density of the energy storage battery pack. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a liquid-cooled energy storage battery pack that improves space utilization, makes the structure more compact, and is conducive to improving energy density.

[0005] This application provides a liquid-cooled energy storage battery pack, including:

[0006] Liquid cooling plate;

[0007] The bottom frame is fixedly connected to the liquid cooling plate around its perimeter.

[0008] The battery module is placed on top of the liquid cooling plate and supported by the bottom frame;

[0009] The top cover is used to cover the battery module and is detachably connected to the bottom frame.

[0010] Optionally, the bottom frame is provided with multiple mounting beams to divide the interior of the bottom frame into multiple independent areas. The top of the bottom frame is higher than the liquid cooling plate. The battery module includes multiple battery clusters adapted to the independent areas, and the battery clusters are connected to the corresponding mounting beams.

[0011] Optionally, mounting plates are provided on both sides of the battery cluster, the mounting plates have mounting holes, and the mounting beam has mounting screw holes corresponding to the mounting holes. The mounting plates and the mounting beam are fixed by screws that pass through the mounting holes and are screwed into the mounting screw holes.

[0012] Optionally, the bottom frame includes two horizontally distributed side beams and two end beams perpendicular to the side beams. The side beams are in the shape of a stepped structure. The liquid cooling plate is attached to the bottom of the end beams and the inner side of the stepped structure, so that the bottom of the liquid cooling plate is suspended.

[0013] Optionally, the side beam includes an upper tube and a lower tube disposed at the bottom of the upper tube. The width of the upper tube is greater than the width of the lower tube. The side of the liquid cooling plate is attached to one side of the lower tube, and the top edge of the liquid cooling plate is attached to and fixedly connected to the top of the upper tube.

[0014] Optionally, the outer side of the side beam is provided with multiple lifting holes along its own length for the installation and transportation of the battery pack.

[0015] Optionally, an inlet connector and an outlet connector are respectively provided at one end of the liquid cooling plate near both sides.

[0016] Optionally, a heat-conducting layer is provided between the liquid cooling plate and the battery module.

[0017] Optionally, one end of the top cover is provided with an integral bracket, the integral bracket is provided with mounting ports for a high-voltage connection module, a low-voltage connection module and a management module, and the side of the top cover used for mounting the integral bracket has a first opening, a second opening and a third opening respectively corresponding to the mounting ports for the high-voltage connection module, the low-voltage connection module and the management module, and a detachable cover plate is provided at the mounting port for the management module.

[0018] Optionally, the high-pressure connection module includes a high-pressure connector and a first explosion-proof valve, and the low-pressure connection module includes a low-pressure connector, a detector, a fire sprinkler head, and a second explosion-proof valve.

[0019] The beneficial effects of this application are that the battery module is supported and fixed by the bottom frame, and the liquid cooling plate is attached to the bottom of the battery module and fixed to the bottom frame. It is equivalent to the liquid cooling plate being embedded in the bottom frame, thereby saving internal space and improving space utilization. This makes the structure more compact, which is conducive to improving energy density. Furthermore, the exposed bottom surface of the liquid cooling plate is more conducive to heat dissipation. Even if the liquid cooling plate is damaged and leaks due to external force, it will flow out in time, reducing the probability of contact with the battery module and helping to reduce safety risks. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a liquid-cooled energy storage battery pack provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 Enlarged view of area A in the image;

[0022] Figure 3 A schematic diagram of the bottom frame provided in an embodiment of this application;

[0023] Figure 4This is a front structural diagram of the liquid-cooled energy storage battery pack provided in an embodiment of this application.

[0024] In the diagram: 100, liquid cooling plate; 110, liquid inlet connector; 120, liquid outlet connector; 200, bottom frame; 210, side beam; 211, upper pipe; 212, lower pipe; 213, lifting hole; 220, end beam; 230, mounting beam; 300, battery module; 310, battery cluster; 311, battery management module; 400, top cover; 410, first opening; 420, second opening; 430, third opening; 440, flange edge; 500, integral bracket; 510, high-voltage connection module; 511, high-voltage connector; 512, first explosion-proof valve; 520, low-voltage connection module; 521, low-voltage connector; 522, detector; 523, fire sprinkler head; 524, second explosion-proof valve; 530, management module mounting port; 540, cover plate. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] like Figure 1-4 As shown, this application provides a liquid-cooled energy storage battery pack, including: a liquid cooling plate 100, a bottom frame 200, a battery module 300, and a top cover 400; wherein, the bottom frame 200 is fixedly connected to the liquid cooling plate 100 around its perimeter; the battery module 300 is placed on top of the liquid cooling plate 100 and supported by the bottom frame 200; the top cover 400 is used to cover the battery module 300 and is detachably connected to the bottom frame 200.

[0027] Compared with the prior art, the liquid-cooled energy storage battery pack provided in this application supports and fixes the battery module 300 through the bottom frame 200. The liquid cooling plate 100 is attached to the bottom of the battery module 300 and fixed to the bottom frame 200, which is equivalent to the liquid cooling plate 100 being embedded in the bottom frame 200. This saves internal space, improves space utilization, and makes the structure more compact, which is conducive to improving energy density. Furthermore, the exposed bottom surface of the liquid cooling plate 100 is more conducive to heat dissipation. Even if the liquid cooling plate 100 is damaged and leaks due to external force, it will flow out in time, reducing the probability of contact with the battery module 300 and helping to reduce safety risks.

[0028] In one possible implementation, the bottom edge of the top cover 400 is provided with a flange edge 440 for fixed connection to the bottom frame 200 by screws.

[0029] In one possible implementation, such as Figure 3As shown, the bottom frame 200 has multiple mounting beams 230 to divide the interior of the bottom frame 200 into multiple independent areas. The top of the bottom frame 200 is higher than the liquid cooling plate 100. The battery module 300 includes multiple battery clusters 310 adapted to the independent areas, and the battery clusters 310 are connected to the corresponding mounting beams 230. Specifically, the mounting beams 230 are distributed parallel to the end beams 220, and their ends are fixed to the two side beams 210 by screws or welding. The spacing between adjacent mounting beams 230 is the same, allowing for the installation of battery clusters 310 of the same specifications.

[0030] In one possible implementation, mounting plates are provided on both sides of the battery cluster 310. The mounting plates have mounting holes, and the mounting beam 230 has mounting screw holes corresponding to these mounting holes. The mounting plates and mounting beam 230 are fixed together by screws that pass through the mounting holes and are screwed into them. Specifically, the battery cluster 310 is connected to the mounting plates using screws, facilitating assembly and disassembly. The design of the double-sided mounting plates enhances the fixation of the battery cluster 310, preventing vibration or displacement during operation. If adjustment of the battery cluster 310's position is required, it can be achieved by loosening or replacing the screws.

[0031] In one possible implementation, such as Figure 2 As shown, the bottom frame 200 includes two horizontally distributed side beams 210 and two end beams 220 perpendicular to the side beams 210. The side beams 210 have a stepped structure. The liquid cooling plate 100 is attached to the bottom of the end beams 220 and the inner side of the stepped structure, so that the bottom of the liquid cooling plate 100 is suspended. Specifically, the heat generated during equipment operation is conducted to the liquid cooling plate 100 through a heat-conducting layer (such as a heat-conducting pad or heat-conducting paste). The liquid cooling plate 100 has cooling channels inside, and the cooling medium (such as water or ethylene glycol solution) circulates in the channels to carry away the heat. The stepped side beams 210 not only provide mechanical support, but their inner side is attached to the liquid cooling plate 100, enhancing the heat transfer path. The end beams 220 also serve as heat transfer auxiliary structures, helping the liquid cooling plate 100 absorb heat more evenly. The bottom of the liquid cooling plate 100 is suspended to avoid thermal short circuits or heat backflow caused by contact with the external environment (such as the ground or chassis base plate). It also provides sufficient space for thermal expansion of the liquid cooling system, reducing structural stress caused by temperature changes. Combining cooling and structural support functions saves space and improves system integration.

[0032] In one possible implementation, such as Figure 2As shown, the side beam 210 includes an upper tube 211 and a lower tube 212 disposed at the bottom of the upper tube 211. The width of the upper tube 211 is greater than the width of the lower tube 212. The side of the liquid cooling plate 100 is attached to one side of the lower tube 212, and the top edge of the liquid cooling plate 100 is attached to and fixedly connected to the top of the upper tube 211. Specifically, the side beam 210 is composed of an upper tube 211 (wide) and a lower tube 212 (narrow), forming a stepped structure. The width of the upper tube 211 is greater than that of the lower tube 212. The top edge of the liquid cooling plate 100 is attached to and fixed to the top of the upper tube 211, while the side is attached to one side of the lower tube 212. The top of the liquid cooling plate 100 is fixedly connected to the upper tube 211 to prevent the liquid cooling plate 100 from shifting or loosening due to equipment vibration or external impact, thus ensuring the reliability of long-term operation. The bottom of the liquid cooling plate 100 does not directly contact other components and remains suspended to avoid thermal short circuits, while providing thermal expansion space for the liquid cooling system.

[0033] In one possible implementation, the side beam 210 has multiple lifting holes 213 along its length on its outer side for the installation and transportation of the battery pack. Specifically, the side beam 210, as part of the battery pack frame, is typically made of metal profiles (such as aluminum profiles) with good strength and thermal conductivity. Multiple lifting holes 213 (which can be through holes) are evenly or as needed along the outer length of the side beam 210 for connecting lifting tools, hooks, bolts, or other installation tools. The standardized layout of the lifting holes 213 allows the battery pack to be quickly installed and disassembled using automated equipment or cranes, improving production line efficiency. It also reduces the safety risks associated with manual handling, making it particularly suitable for large-size, heavy battery packs (such as power batteries for new energy vehicles).

[0034] In one possible implementation, an inlet connector 110 and an outlet connector 120 are respectively provided at one end of the liquid cooling plate 100 near both sides. Specifically, the inlet connector 110 and the outlet connector 120 can be of the same type, including but not limited to straight-through connectors, elbow connectors, or multi-channel connectors. The installation methods of the inlet connector 110 and the outlet connector 120 with the liquid cooling plate 100 include but are not limited to welding connection, threaded connection, or flange connection.

[0035] In one possible implementation, a thermally conductive layer is disposed between the liquid cooling plate 100 and the battery module 300. Specifically, the thermally conductive layer can be a thermal pad or thermal paste, which can effectively reduce contact thermal resistance, allowing the heat generated by the battery to be conducted to the liquid cooling plate 100 more quickly and then carried away by the coolant. The contact surfaces of the battery module 300 and the liquid cooling plate 100 may have minor unevenness or roughness. The thermally conductive layer can fill these tiny gaps, increasing the actual contact area and improving the thermal contact performance between the two. During battery operation, temperature changes may cause thermal expansion and contraction of materials. The thermally conductive layer can buffer this thermal stress to a certain extent, protecting the battery structure from damage.

[0036] In one possible implementation, an integral bracket 500 is provided at one end of the top cover 400. The integral bracket 500 is provided with a high-voltage connection module 510, a low-voltage connection module 520, and a management module mounting port 530. The side of the top cover 400 used for mounting the integral bracket 500 has a first opening 410, a second opening 420, and a third opening 430 corresponding to the high-voltage connection module 510, the low-voltage connection module 520, and the management module mounting port 530, respectively. A removable cover plate 540 is provided at the management module mounting port 530, surrounding the outer periphery of the battery management module 311 (BMS). The cover plate 540 is fixed and covers the management module mounting port 530 with multiple screws, thus protecting the battery management module 311. The high-voltage connection module 510 includes a high-voltage connector 511 and a first explosion-proof valve 512. The low-voltage connection module 520 includes a low-voltage connector 521, a detector 522, a fire sprinkler head 523, and a second explosion-proof valve 524. The primary function of the first explosion-proof valve 512 and the second explosion-proof valve 524 is to rapidly open and release internal pressure when the internal pressure of the battery rises to a dangerous level due to abnormal conditions (such as overheating, short circuit, etc.), thereby preventing the battery pack from exploding or rupturing and ensuring the safety of the entire battery system. The detector 522 is mainly used to monitor the battery's status to ensure its safe and efficient operation. The detector 522 includes, but is not limited to, temperature sensors, voltage sensors, current sensors, gas sensors, or humidity sensors.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A liquid-cooled energy storage battery pack, characterized in that, include: Liquid cooling plate (100); The bottom frame (200) is fixedly connected to the liquid cooling plate (100) around its perimeter; The battery module (300) is placed on top of the liquid cooling plate (100) and supported by the bottom frame (200); The top cover (400) is used to cover the battery module (300) and is detachably connected to the bottom frame (200).

2. The liquid-cooled energy storage battery pack according to claim 1, characterized in that, The bottom frame (200) is provided with multiple mounting beams (230) to divide the interior of the bottom frame (200) into multiple independent areas. The top of the bottom frame (200) is higher than the liquid cooling plate (100). The battery module (300) includes multiple battery clusters (310) adapted to the independent areas. The battery clusters (310) are connected to the corresponding mounting beams (230).

3. The liquid-cooled energy storage battery pack according to claim 2, characterized in that, The battery cluster (310) is provided with mounting plates on both sides, the mounting plates have mounting holes, and the mounting beam (230) has mounting screw holes corresponding to the mounting holes. The mounting plates and the mounting beam (230) are fixed by screws that pass through the mounting holes and are screwed into the mounting screw holes.

4. The liquid-cooled energy storage battery pack according to claim 1, characterized in that, The bottom frame (200) includes two horizontally distributed side beams (210) and two end beams (220) perpendicular to the side beams (210). The side beams (210) are in the shape of a stepped structure. The liquid cooling plate (100) is attached to the bottom of the end beams (220) and the inner side of the stepped structure, so that the bottom of the liquid cooling plate (100) is suspended.

5. The liquid-cooled energy storage battery pack according to claim 4, characterized in that, The side beam (210) includes an upper tube (211) and a lower tube (212) disposed at the bottom of the upper tube (211). The width of the upper tube (211) is greater than the width of the lower tube (212). The side of the liquid cooling plate (100) is attached to one side of the lower tube (212), and the top edge of the liquid cooling plate (100) is attached to the top of the upper tube (211) and fixedly connected.

6. The liquid-cooled energy storage battery pack according to claim 5, characterized in that, The side beam (210) has multiple lifting holes (213) along its length on the outer side for the installation and transportation of the battery pack.

7. The liquid-cooled energy storage battery pack according to any one of claims 1-6, characterized in that, The liquid cooling plate (100) is provided with an inlet connector (110) and an outlet connector (120) at one end near the two sides.

8. The liquid-cooled energy storage battery pack according to any one of claims 1-6, characterized in that, A heat-conducting layer is provided between the liquid cooling plate (100) and the battery module (300).

9. The liquid-cooled energy storage battery pack according to any one of claims 1-6, characterized in that, One end of the top cover (400) is provided with an integral bracket (500). The integral bracket (500) is provided with a high-voltage connection module (510), a low-voltage connection module (520), and a management module mounting port (530). The side of the top cover (400) used to install the integral bracket (500) has a first opening (410), a second opening (420), and a third opening (430) corresponding to the high-voltage connection module (510), the low-voltage connection module (520), and the management module mounting port (530), respectively. A detachable cover plate (540) is provided at the management module mounting port (530).

10. The liquid-cooled energy storage battery pack according to claim 9, characterized in that, The high-voltage connection module (510) includes a high-voltage connector (511) and a first explosion-proof valve (512), and the low-voltage connection module (520) includes a low-voltage connector (521), a detector (522), a fire sprinkler head (523), and a second explosion-proof valve (524).

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