Energy storage device

Abstract

The utility model discloses an energy storage device which comprises a first battery pack group, a second battery pack group, a first circulating pipeline and a second circulating pipeline, wherein the first battery pack group and the second battery pack group are arranged on two opposite sides of the energy storage device. The first circulating pipeline is provided with a first opening and a second opening, the first circulating pipeline is connected with the first battery pack group, and the first opening and the second opening are used for connecting the first circulating pipeline with the liquid cooling assembly. A third opening and a fourth opening are formed in the second circulation pipeline, the second circulation pipeline is connected with the second battery pack group, and the third opening and the fourth opening are used for connecting the second circulation pipeline and the liquid cooling assembly. The first opening, the third opening, the second opening and the fourth opening are sequentially arranged at intervals in the first direction. The energy storage device solves the problem that when an existing energy storage device is connected with the liquid cooling assembly, only a specific water inlet and outlet arrangement mode can be matched, and the compatibility and flexibility of the energy storage device are limited.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an energy storage device. Background Technology

[0002] In current energy storage device designs, the application of liquid cooling components is a key factor in ensuring the device operates under conditions of high efficiency and high safety. Existing liquid cooling components are mainly divided into two types, designed and applied with different inlet and outlet arrangements. One type of liquid cooling component uses an "outlet-inlet-inlet-out" arrangement, while the other design uses an "outlet-outlet-inlet-in" arrangement.

[0003] However, current energy storage devices are often designed to be compatible with only one type of liquid cooling component, meaning they can only accommodate a specific inlet / outlet arrangement. This design limitation results in a lack of flexibility in selecting and applying liquid cooling components, making it impossible to simultaneously accommodate two different liquid cooling component arrangements. Utility Model Content

[0004] One objective of this invention is to provide an energy storage device that addresses the technical problem that existing energy storage devices, when connected to liquid cooling components, can often only be matched with specific inlet and outlet arrangements.

[0005] To achieve the above objectives, the present invention provides an energy storage device, characterized in that it comprises: a first battery pack group and a second battery pack group disposed on opposite sides of the energy storage device, a first circulation pipeline and a second circulation pipeline. The first circulation pipeline has a first port and a second port, and is connected to the first battery pack group. The first port and the second port are used to connect the first circulation pipeline to a liquid cooling component. The second circulation pipeline has a third port and a fourth port, and is connected to the second battery pack group. The third port and the fourth port are used to connect the second circulation pipeline to the liquid cooling component. The first port, the third port, the second port and the fourth port are arranged sequentially at intervals along a first direction.

[0006] Optionally, the first circulation pipeline includes a first main pipe and a first branch pipe. The first battery pack is connected to the first main pipe through the first branch pipe. The first main pipe has a first port and a second port, which are used to connect the first main pipe to a liquid cooling assembly. The second circulation pipeline includes a second main pipe and a second branch pipe. The second battery pack is connected to the second main pipe through the second branch pipe. The second main pipe has a third port and a fourth port, which are used to connect the second main pipe to a liquid cooling assembly.

[0007] Optionally, the first battery pack group includes multiple first battery packs, and multiple first branch pipes are provided. The multiple first branch pipes and the first main pipe are connected to form multiple parallel first branches, and the first branches are connected to the first battery packs. The second battery pack group includes multiple second battery packs, and multiple second branch pipes are provided. The multiple second branch pipes and the second main pipe are connected to form multiple parallel second branches, and the second branches are connected to the second battery packs.

[0008] Optionally, the first branch has multiple first battery packs connected in series through multiple first branch pipes, and the second branch has multiple second battery packs connected in series through multiple second branch pipes.

[0009] Optionally, both the first main pipe and the second main pipe are rigid pipes, and both the first branch pipe and the second branch pipe are flexible pipes.

[0010] Optionally, the first battery pack group includes a plurality of first battery packs spaced apart along a second direction. The second battery pack group includes a plurality of second battery packs spaced apart along a second direction. The energy storage device includes a frame, which includes a top seat, a base, a plurality of first support beams, and a plurality of second support beams. The top seat and the base are arranged opposite to each other along the second direction. The first support beams connect the top seat and the base. The plurality of second support beams are spaced apart on the first support beams along the second direction, and the second support beams are disposed between adjacent first battery packs and / or second battery packs.

[0011] Optionally, along the second direction, the distance between the top seat and the base is H1, the distance between adjacent second support beams is H2, the thickness of the second support beam is H3, and 5.1≤(H1+H2) / H1≤7.3.

[0012] Optional, 1647 (mm) ≤ H1 ≤ 2248 (mm).

[0013] Optionally, along the second direction, the spacing between adjacent second support beams is H2, and the thickness of the second support beam is H3, where 5.3 ≤ H2 / H3 ≤ 10.3.

[0014] Optionally, 162 (mm) ≤ H2 ≤ 378 (mm), 15.7 (mm) ≤ H3 ≤ 71.3 (mm).

[0015] The beneficial effects of this utility model are as follows:

[0016] The energy storage device includes a first battery pack and a second battery pack disposed on opposite sides of the energy storage device, a first circulation pipeline, and a second circulation pipeline. The first circulation pipeline has a first port and a second port, connecting to the first battery pack. The first and second ports are also used to connect the first circulation pipeline to a liquid cooling component. The second circulation pipeline has a third port and a fourth port, connecting to the second battery pack. The third and fourth ports are used to connect the second circulation pipeline to the liquid cooling component. The first, third, second, and fourth ports are arranged sequentially at intervals along a first direction.

[0017] In practical applications, existing energy storage devices, when connected to liquid cooling components, often can only be matched with specific inlet / outlet arrangements, such as inlet-outlet-inlet-out or inlet-outlet-inlet-outlet, which limits the system's compatibility and flexibility. To solve this technical problem, this invention designs a specific interface arrangement, where the first, third, second, and fourth ports are sequentially spaced along a first direction. Specifically, when connecting an inlet-outlet-inlet-outlet liquid cooling component, the first and second ports are connected to the outlet and inlet of the liquid cooling component, respectively, while the third and fourth ports are also connected to their corresponding outlet and inlet. When connecting an inlet-outlet-inlet-outlet liquid cooling component, the first port is connected to the outlet, the second port to the inlet, and similarly, the third port to the outlet and the fourth port to the inlet. This flexible interface design achieves compatibility with two liquid cooling component arrangements, significantly improving the device's applicability and flexibility. The advantages of this innovative design are reduced dependence on specific liquid cooling components, lower installation complexity and cost, and improved system reliability and market adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the energy storage device provided in this embodiment of the utility model;

[0020] Figure 2 This is provided by the embodiment of the present utility model. Figure 1 Enlarged layout diagram of area A in the middle;

[0021] Figure 3 This is a structural schematic diagram provided by an embodiment of the present invention to illustrate the first circulation pipeline and the second circulation pipeline;

[0022] Figure 4This is a structural schematic diagram provided by an embodiment of the present invention to illustrate the first support beam and the second support beam;

[0023] Figure 5 This is a structural schematic diagram provided by an embodiment of the present invention to illustrate the first support beam and the second support beam.

[0024] Explanation of icon numbers:

[0025] 20. First circulation pipeline; 21. First port; 22. Second port; 23. First main pipe; 24. First branch pipe; 30. Second circulation pipeline; 31. Third port; 32. Fourth port; 33. Second main pipe; 34. Second branch pipe; 40. Skeleton; 41. Top seat; 42. Base; 43. First support beam; 44. Second support beam; 50. First direction; 60. Second direction. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the overall structure of the energy storage device provided in this embodiment of the utility model. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 Enlarged layout diagram of area A in the middle, Figure 3 This is a structural schematic diagram of the first circulation pipeline 20 and the second circulation pipeline 30 provided by an embodiment of the present invention.

[0028] This utility model provides an energy storage device, including a first battery pack and a second battery pack disposed on opposite sides of the energy storage device, a first circulation pipeline 20, and a second circulation pipeline 30. The first circulation pipeline 20 has a first port 21 and a second port 22, connecting to the first battery pack. The first port 21 and the second port 22 are used to connect the first circulation pipeline 20 to a liquid cooling component. The second circulation pipeline 30 has a third port 31 and a fourth port 32, connecting to the second battery pack. The third port 31 and the fourth port 32 are used to connect the second circulation pipeline 30 to the liquid cooling component. The first port 21, the third port 31, the second port 22, and the fourth port 32 are arranged sequentially at intervals along a first direction 50, where the first direction 50 is the width or length direction of the energy storage device.

[0029] In practical applications, existing energy storage devices, when connected to liquid cooling components, often can only be matched with specific inlet / outlet arrangements, such as inlet-outlet-inlet-out or inlet-outlet-inlet-outlet, which limits the compatibility and flexibility of the energy storage device. To solve this technical problem, this invention designs a specific interface arrangement, where the first port 21, the third port 31, the second port 22, and the fourth port 32 are arranged sequentially at intervals along a first direction 50. Specifically, when connecting an inlet-outlet-inlet-outlet liquid cooling component, the first port 21 and the second port 22 are connected to the outlet and inlet of the liquid cooling component, respectively, while the third port 31 and the fourth port 32 are also connected to their corresponding outlet and inlet, respectively. When connecting an inlet-outlet-inlet-outlet liquid cooling component, the first port 21 is connected to the outlet, the second port 22 is connected to the inlet, and similarly, the third port 31 is connected to the outlet, and the fourth port 32 is connected to the inlet. Through this flexible interface design, compatibility with two liquid cooling component arrangements is achieved, significantly improving the applicability and flexibility of the device. The advantage of this innovative design is that it reduces reliance on specific liquid cooling components, lowers installation complexity and cost, and improves system reliability and market adaptability.

[0030] In one embodiment, see Figure 2 and Figure 3 The first circulation pipeline 20 includes a first main pipe 23 and a first branch pipe 24. The first battery pack is connected to the first main pipe 23 through the first branch pipe 24. The first main pipe 23 has a first port 21 and a second port 22, which are used to connect the first main pipe 23 to the liquid cooling assembly. The second circulation pipeline 30 includes a second main pipe 33 and a second branch pipe 34. The second battery pack is connected to the second main pipe 33 through the second branch pipe 34. The second main pipe 33 has a third port 31 and a fourth port 32, which are used to connect the second main pipe 33 to the liquid cooling assembly.

[0031] In practical applications, liquid cooling systems for energy storage devices typically require cooling multiple battery packs. However, in traditional technologies, the cooling medium in a single pipe experiences a temperature increase as the number of battery packs increases, leading to a decrease in heat exchange capacity. Therefore, a single pipe cannot efficiently manage the heat of multiple battery packs, resulting in low system efficiency. To address this problem, specifically, the first battery pack is connected to the first main pipe 23 via a first branch pipe 24. The first main pipe 23 has a first port 21 and a second port 22 for connecting liquid cooling components. Similarly, the second battery pack is connected to the second main pipe 33 via a second branch pipe 34. The second main pipe 33 has a third port 31 and a fourth port 32 for connecting liquid cooling components. The advantage of this design is that it enables independent cooling and thermal management of multiple battery packs, significantly improving the system's cooling efficiency and overall performance. Compared to traditional designs, this invention offers a flexible pipe connection method, allowing for configuration adjustments based on different needs, reducing the complexity of the liquid cooling system, and simultaneously improving the reliability and lifespan of the energy storage device. This independent cycle design ensures that each battery pack operates within its optimal temperature range, further enhancing the safety and energy efficiency of the energy storage device.

[0032] Further, see Figure 3 The first battery pack group includes multiple first battery packs, which are spaced apart along the height direction of the energy storage device. Multiple first branch pipes 24 are provided, also spaced apart along the height direction of the energy storage device. The multiple first branch pipes 24 are connected to a first main pipe 23 to form multiple parallel first branches, each connected to a first battery pack. The second battery pack group includes multiple second battery packs, which are spaced apart along the height direction of the energy storage device. Multiple second branch pipes 34 are provided, also spaced apart along the height direction of the energy storage device. The multiple second branch pipes 34 are connected to a second main pipe 33 to form multiple parallel second branches, each connected to a second battery pack.

[0033] In practical applications, a single circulation pipeline often cannot effectively manage the heat of multiple battery packs, leading to a decrease in overall system efficiency and reliability. To further improve system performance and flexibility, this application introduces a parallel pipeline design. Specifically, the first battery pack group consists of multiple first battery packs and is connected to the first main pipe 23 via multiple first branch pipes 24, forming multiple parallel first branches. These branches are connected to the first battery packs, allowing the cooling medium to simultaneously enter multiple first branches from the first main pipe 23, and the cooling medium from multiple first branches to simultaneously flow back to the first main pipe 23, ensuring that each battery pack receives independent and uniform cooling. Similarly, the second battery pack group consists of multiple second battery packs and is connected to the second main pipe 33 via multiple second branch pipes 34, forming multiple parallel second branches, ensuring effective cooling of the second battery pack group.

[0034] Multiple parallel first branches and multiple parallel second branches enable more efficient thermal management, allowing each battery pack to operate under optimal temperature conditions, thus improving battery performance and lifespan. Secondly, the parallel structure provides higher system redundancy; a failure in one branch will not affect the normal operation of other branches, thereby improving system reliability.

[0035] Further, see Figure 3 The first branch is connected in series with multiple first battery packs via multiple first branch pipes 24, and the second branch is connected in series with multiple second battery packs via multiple second branch pipes 34.

[0036] In practical applications, the first branch connects multiple first battery packs in series via multiple first branch pipes 24, and the second branch connects multiple second battery packs in series via multiple second branch pipes 34. This allows the cooling medium to sequentially exchange heat with multiple battery packs in a single flow path, significantly improving the utilization rate and cooling efficiency of the cooling medium. With this design, the cooling medium effectively removes heat as it flows through each battery pack, eliminating the need for additional cooling components for each battery pack.

[0037] In this embodiment, the first battery pack group includes two rows of multiple first battery packs spaced apart along the height direction of the energy storage device, with each first branch having two first battery packs connected in series. The second battery pack group includes two rows of multiple second battery packs spaced apart along the height direction of the energy storage device, with each second branch having two second battery packs connected in series.

[0038] Optionally, see Figure 3 The first main pipe 23 and the second main pipe 33 are both rigid pipes, while the first branch pipe 24 and the second branch pipe 34 are both flexible pipes.

[0039] In practical applications, this achieves an optimal balance between stability and flexibility. Rigid piping provides structural robustness and durability, ensuring the stability and pressure resistance of the main cooling paths. Flexible piping, on the other hand, provides the necessary flexibility for branch sections, facilitating installation and maintenance, while also adapting to changes in internal space and thermal expansion and contraction.

[0040] The advantages of this piping combination are as follows: First, the rigid main pipe ensures the overall stability and long-term reliability of the cooling system, providing strong pressure resistance and preventing leakage risks. Second, the use of flexible branch pipes improves the system's adaptability and ease of installation, enabling flexible responses to different layout requirements and space constraints. For example, when the first battery pack deviates from its designed position due to errors, the first branch pipe 24, being a flexible pipe, can adjust its shape within a certain range to connect to the first battery pack. Furthermore, the flexibility and adjustability of the flexible pipes make system maintenance more convenient, reducing the risk of damage caused by pipe displacement or vibration.

[0041] Through this optimized pipeline configuration, the energy storage device of the present invention not only enhances the stability and durability of the cooling system, but also improves the system's flexibility and maintainability, providing users with a more reliable and efficient energy storage solution.

[0042] In this embodiment, the rigid pipe is fixed by pipe clamps, and the flexible pipe is fixed by cable ties.

[0043] In one embodiment, reference is made to Figure 4 and Figure 5 The first battery pack group includes multiple first battery packs spaced apart along a second direction 60. The second battery pack group includes multiple second battery packs spaced apart along a second direction 60. The energy storage device includes a frame 40, which includes a top seat 41, a base 42, multiple first support beams 43, and multiple second support beams 44. The top seat 41 and the base 42 are arranged opposite each other along the second direction 60. The first support beams 43 connect the top seat 41 and the base 42. The multiple second support beams 44 are spaced apart on the first support beams 43 along the second direction 60, and the second support beams 44 are disposed between adjacent first battery packs and / or second battery packs. The second direction 60 is the height direction of the energy storage device.

[0044] In practical applications, precise welding processes and adjustable support structures significantly improve the assembly accuracy of each battery pack layer and the overall structural stability. Specifically, the frame 40 is welded layer by layer along the second direction 60: first, the base 42 is welded to a first support beam 43; then, the first support beam 43 is welded to a second support beam 44; next, multiple first support beams 43 and multiple second support beams 44 are alternately welded along the second direction 60; finally, the first support beam 43 is welded to the top seat 41. During this process, the dimensions and levelness of the first support beam 43 or the second support beam 44 in the second direction 60 can be fine-tuned to ensure the precise arrangement and stability of each layer. This design and process effectively reduce assembly errors, thereby improving the performance and reliability of the energy storage device.

[0045] Furthermore, referring to Figure 5 Along the second direction 60, the distance between the top seat 41 and the base 42 is H1, the distance between adjacent second support beams 44 is H2, the thickness of the second support beam 44 is H3, and 5.1≤(H1+H2) / H1≤7.3.

[0046] In practical applications, the spacing between adjacent second support beams 44 needs to be slightly larger than the thickness of the battery pack to ensure that the battery pack can be accommodated smoothly. However, this spacing cannot be too large, otherwise the gap between adjacent battery packs will be too large, wasting internal space of the energy storage device and causing an unnecessary increase in the device size. Through reasonable dimensional design, not only is the stable positioning of each battery pack guaranteed, but the overall structural compactness and space utilization of the device are also optimized. This meticulous design and adjustment further improves the performance and reliability of the device.

[0047] In this embodiment, 1647 (mm) ≤ H1 ≤ 2248 (mm).

[0048] Optionally, refer to Figure 5 Along the second direction 60, the spacing between adjacent second support beams 44 is H2, the thickness of the second support beam 44 is H3, and 5.3≤H2 / H3≤10.3.

[0049] In practical applications, the design of the support beams has a significant impact on the overall structural strength of the device. Specifically, the larger the spacing between adjacent second support beams 44, the weaker the overall structural strength of the energy storage device may be, because a larger spacing leads to a reduction in the supporting force between the support points. Conversely, the greater the thickness of the second support beams 44, the stronger the structural strength of the energy storage device will be, because thicker support beams can provide stronger load-bearing capacity and stability.

[0050] Building upon previous optimized designs, by rationally controlling the spacing (H2) and thickness (H3) of adjacent second support beams 44 and maintaining them within the range of 5.3 ≤ H2 / H3 ≤ 10.3, the battery pack is ensured to be stably housed while avoiding wasted space. This design balances space utilization and structural strength, resulting in improvements in the compactness, reliability, and performance of the energy storage device.

[0051] In this embodiment, 162 (mm) ≤ H2 ≤ 378 (mm), 15.7 (mm) ≤ H3 ≤ 71.3 (mm).

[0052] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0053] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0054] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0055] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An energy storage device, characterized in that, include: The first battery pack group and the second battery pack group are disposed on opposite sides of the energy storage device; A first circulation pipeline has a first port and a second port. The first circulation pipeline is connected to the first battery pack. The first port and the second port are used to connect the first circulation pipeline to a liquid cooling component. The second circulation pipeline has a third port and a fourth port, and the second circulation pipeline is connected to the second battery pack. The third port and the fourth port are used to connect the second circulation pipeline and the liquid cooling assembly. The first port, the third port, the second port, and the fourth port are arranged at intervals along the first direction.

2. The energy storage device according to claim 1, characterized in that, The first circulation pipeline includes a first main pipe and a first branch pipe. The first battery pack is connected to the first main pipe through the first branch pipe. The first main pipe has a first port and a second port, which are used to connect the first main pipe to the liquid cooling assembly. The second circulation pipeline includes a second main pipe and a second branch pipe. The second battery pack is connected to the second main pipe through the second branch pipe. The second main pipe has the third port and the fourth port, which are used to connect the liquid cooling assembly to the second main pipe.

3. The energy storage device according to claim 2, characterized in that, The first battery pack group includes multiple first battery packs, and multiple first branch pipes are provided. The multiple first branch pipes and the first main pipe are connected to form multiple parallel first branches, and the first branches are connected to the first battery packs. The second battery pack group includes multiple second battery packs, and multiple second branch pipes are provided. The multiple second branch pipes and the second main pipe are connected to form multiple parallel second branches, and the second branches are connected to the second battery packs.

4. The energy storage device according to claim 3, characterized in that, The first branch is connected in series with multiple first battery packs through multiple first branch pipes; The second branch is connected in series with multiple second battery packs via multiple second branch pipes.

5. The energy storage device according to any one of claims 2 to 4, characterized in that, Both the first main pipe and the second main pipe are rigid pipes, while both the first branch pipe and the second branch pipe are flexible pipes.

6. The energy storage device according to claim 1, characterized in that, The first battery pack group includes a plurality of first battery packs spaced apart along the second direction; The second battery pack group includes a plurality of second battery packs spaced apart along the second direction; The energy storage device includes a frame, which includes a top seat, a base, a plurality of first support beams and a plurality of second support beams. The top seat and the base are arranged opposite to each other along the second direction. The first support beams connect the top seat and the base. The plurality of second support beams are spaced apart on the first support beams along the second direction. The second support beams are arranged between adjacent first battery packs and / or second battery packs.

7. The energy storage device according to claim 6, characterized in that, Along the second direction, the distance between the top seat and the base is H1, the distance between adjacent second support beams is H2, the thickness of the second support beam is H3, and 5.1≤(H1+H2) / H1≤7.

3.

8. The energy storage device according to claim 7, characterized in that, 1647 (mm) ≤ H1 ≤ 2248 (mm).

9. The energy storage device according to claim 6, characterized in that, Along the second direction, the spacing between adjacent second support beams is H2, and the thickness of the second support beam is H3, where 5.3 ≤ H2 / H3 ≤ 10.

3.

10. The energy storage device according to claim 9, characterized in that, 162 (mm) ≤ H2 ≤ 378 (mm), 15.7 (mm) ≤ H3 ≤ 71.3 (mm).

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