Heat dissipation device and energy storage system

Abstract

The utility model discloses a heat dissipation device and an energy storage system, and belongs to the technical field of energy storage heat management. The heat dissipation device comprises a heat dissipation assembly, the heat dissipation assembly is provided with a heat dissipation air channel, the heat dissipation air channel comprises a first area and a second area which are arranged in the first direction and communicate with each other, and the first direction is the extension direction of the heat dissipation air channel; the heat dissipation assembly comprises a plurality of first fins and a plurality of second fins, the first fins are arranged in the first area at intervals in the second direction and extend in the first direction, and the first direction intersects with the second direction; the second fins are arranged in the second area at intervals in the second direction and extend in the first direction. And in unit volume, the number of the first fins is smaller than that of the second fins. The more second fins are arranged in the second area of the heat dissipation air channel, so that the heat exchange medium dispersion uniformity is improved, the heat exchange medium fluidity is guaranteed, meanwhile, the contact area between the heat exchange medium and the fins is increased, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of energy storage thermal management technology, specifically relating to a heat dissipation device and an energy storage system. Background Technology

[0002] There are two forms of thermal management for energy storage: air cooling and liquid cooling. Liquid cooling has more heat dissipation components and a more complex structure, while air cooling devices are limited by the length of the air duct structure and cannot solve the problem of heat dissipation uniformity at both ends of the air duct and inside the air duct. Utility Model Content

[0003] The purpose of this utility model is to provide a heat dissipation device to overcome the technical problem of uneven heat dissipation in different parts of the current battery pack; another purpose of this application is to provide an energy storage system.

[0004] Technical solution: The heat dissipation device disclosed in the embodiments of this application includes a heat dissipation component, the heat dissipation component has a heat dissipation air duct, the heat dissipation air duct includes a first region and a second region arranged and connected along a first direction, the first direction being the extension direction of the heat dissipation air duct;

[0005] The heat dissipation component includes:

[0006] Multiple first fins are spaced apart in the first region along a second direction and extend along the first direction, the first direction intersecting the second direction;

[0007] Multiple second fins are spaced apart in the second region along the second direction and extend along the first direction;

[0008] Within a unit volume, the number of the first fins is less than the number of the second fins.

[0009] In some embodiments, the heat dissipation duct further includes a third region arranged along the first direction, the third region being located on the side of the second region away from the first region, and the third region being in communication with the second region;

[0010] The heat dissipation assembly further includes a plurality of third fins, which are spaced apart in the third region along the second direction and extend along the first direction;

[0011] Within a unit volume, the number of the third fins is less than the number of the second fins.

[0012] In some embodiments, along the extension direction of the heat dissipation duct, the first region has a length dimension L1, and the third region has a length dimension L3, satisfying L1 > L3.

[0013] In some embodiments, the heat dissipation device further includes a heat-conducting element connected to one side of the heat dissipation assembly for heat exchange with the first fin, the second fin, and the third fin.

[0014] In some embodiments, the heat dissipation device further includes:

[0015] A substrate is connected to the side of the heat-conducting component away from the heat dissipation assembly, and is respectively connected to the first fin, the second fin and the third fin;

[0016] A heat pipe is embedded in the substrate and connected to the heat-conducting component.

[0017] In some embodiments, the heat dissipation device includes a plurality of heat pipes, the heat pipes extending in the same direction as the first direction, and the plurality of heat pipes being arranged at intervals along the second direction.

[0018] This application also discloses an energy storage system, including:

[0019] The heat dissipation device as described in the above embodiments is used to dissipate heat from the battery cell.

[0020] A battery pack, the battery pack comprising a plurality of battery cells, the plurality of battery cells being arranged in multiple columns along the second direction, each column having a plurality of battery cells, the plurality of battery cells being arranged along the first direction.

[0021] In some embodiments, the battery cell has two first surfaces arranged at relative intervals along a third direction, the third direction, the second direction, and the first direction intersecting each other, the electrode of the battery cell being disposed on one of the first surfaces, and the heat dissipation device being disposed on the other first surface.

[0022] In some embodiments, the battery cell has two first surfaces arranged at relative intervals along a third direction and two second surfaces arranged at relative intervals along a second direction, wherein the third direction, the second direction, and the first direction intersect each other, and the electrode post of the battery cell is disposed on the second surface;

[0023] At least one of the first surfaces is provided with the heat dissipation device.

[0024] In some embodiments, the heat dissipation device includes a plurality of heat pipes, with at least one heat pipe corresponding to each column of the battery cells, and the number of heat pipes provided in each column of the battery cells is the same.

[0025] In some embodiments, the energy storage system includes:

[0026] The housing has a cavity for storing the battery pack;

[0027] Multiple battery packs, wherein the heat dissipation device is disposed between two adjacent battery packs;

[0028] The air duct plate divides the interior of the cavity into an air inlet channel and an air outlet channel. The air duct plate has a through hole. The air inlet channel is connected to the inlet of the heat dissipation air duct through the through hole, and the air outlet channel is connected to the outlet of the heat dissipation air duct.

[0029] A refrigeration device having an air outlet and an air return outlet, wherein the air outlet is connected to the air inlet channel and the air return outlet is connected to the air outlet channel.

[0030] In some embodiments, an adjusting valve is further included, which is disposed within the through hole and is used to adjust the size of the through hole.

[0031] In some embodiments, a plurality of battery packs are spaced apart along a third direction, the cooling device is disposed on the sidewall of the housing in the first or second direction and is located on the side of the air outlet channel away from the battery packs, and the air inlet channel is at least partially located between the cooling device and the battery packs.

[0032] Beneficial effects: The heat dissipation device disclosed in this application divides the heat dissipation duct into a first region and a second region, and sets different numbers of fins in different regions. When the heat exchange medium flows along the first direction, the relatively sparse first fins reduce the flow resistance of the medium, ensuring the flow rate and initial velocity of the heat exchange medium entering the heat dissipation duct. As the heat exchange medium enters the second region, the larger number of second fins per unit volume can further disperse the heat exchange medium, improve the flowability of the heat exchange medium, and increase the contact surface with the heat exchange medium, thereby enhancing the heat exchange capacity between the heat dissipation component and the heat exchange medium, and improving the overall heat dissipation efficiency of the heat dissipation device.

[0033] The energy storage system disclosed in this application includes a heat dissipation device as described in the above embodiments, which is used to connect the battery cells. Therefore, it can possess all the technical features and effects of the aforementioned heat dissipation device, and will not be repeated here. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a simplified structural diagram of the heat dissipation device according to an embodiment of this application;

[0036] Figure 2 This is a simplified structural diagram of a heat dissipation device according to another embodiment of this application;

[0037] Figure 3 This is a schematic diagram showing the positional relationship between the heat dissipation device and the battery cell in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the battery pack arrangement in the energy storage system of this application embodiment;

[0039] Figure 5 This is a schematic diagram showing the positional relationship between the heat dissipation device and the battery cell according to another embodiment of this application;

[0040] Figure 6 This is a schematic diagram showing the positional relationship between the heat dissipation device and the battery cell in another embodiment of this application;

[0041] Figure 7 This is a schematic diagram of the energy storage system according to an embodiment of this application;

[0042] Figure 8 This is a schematic diagram of the energy storage system in another embodiment of this application, showing some of the regulating valves;

[0043] Figure 9 This is a schematic diagram of the structure of an energy storage system according to another embodiment of this application;

[0044] Reference numerals: 1. Heat dissipation device; 11. Heat dissipation component; 10. Heat dissipation duct; X, first direction; 101. First region; 102. Second region; 111. First fin; Y, second direction; 112. Second fin; 103. Third region; 113. Third fin; 12. Heat conductor; 13. Substrate; 14. Heat pipe; 20. Battery cell; 2. Battery pack; 201. First surface; 202. Second surface; 21. Terminal post; 3. Housing; 30. Chamber; 4. Air duct plate; 301. Air inlet channel; 302. Air outlet channel; 40. Through hole; 5. Cooling device; 501. Air outlet; 502. Air return outlet; 6. Regulating valve; 31. Side wall. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0046] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name parts or embodiments by number, and do not imply any order of importance between the parts or embodiments.

[0047] It should also be noted that in the accompanying drawings of this application, arrows marked X indicate the first direction or its opposite, arrows marked Y indicate the second direction or its opposite, and arrows marked Z indicate the third direction or its opposite. The introduction of the first, second, and third directions in the description of this application is to more clearly define the structure and relative positional relationships of the components in a heat dissipation device and energy storage system. In actual implementation, the third direction is generally a vertical direction or height direction, while the first and second directions are generally horizontal directions. The first, second, and third directions intersect each other. Optionally, the first, second, and third directions are perpendicular to each other to optimize the layout of a heat dissipation device and energy storage system. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular; for example, an angle between 80° and 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel; for example, a completely parallel angle within 10° is considered parallel.

[0048] As a preamble to the embodiments of this application, energy storage thermal management has two forms: air cooling and liquid cooling. Liquid cooling has a large number of heat dissipation components and a complex structure; while air cooling devices, limited by the length of the air duct structure, cannot solve the problem of heat dissipation uniformity at both ends of the air duct and inside the air duct. Currently, with the increasing demand for high energy density in energy storage systems, the size of battery packs is increasing, and the difficulty of controlling the temperature uniformity of the battery pack is also gradually increasing. The air cooling method used in conventional energy storage systems cannot solve the problem of uneven heat dissipation in different parts of the battery pack, and the complex air ducts seriously affect the improvement of energy density of the energy storage system.

[0049] Furthermore, traditional air cooling uses cold air from an air conditioner to cool the large surfaces of the battery cells. A certain gap needs to be left between these large surfaces, resulting in lower energy density for air-cooled battery packs compared to liquid-cooled systems. Combined with the space required for system airflow, the energy density of air-cooled energy storage systems is significantly lower than that of liquid-cooled systems. Large-area heat dissipation and complex internal airflow within the battery pack, along with the need for cooling fans, further contribute to the lower energy efficiency of air-cooled systems compared to liquid-cooled systems.

[0050] In view of this, embodiments of this application provide a heat dissipation device, which aims to solve at least one of the above-mentioned technical problems.

[0051] Please see Figures 1 to 9 As shown, the heat dissipation device 1 disclosed in this application includes a heat dissipation assembly 11. The heat dissipation assembly 11 has a heat dissipation duct 10. The heat dissipation duct 10 includes a first region 101 and a second region 102 arranged and connected along a first direction X, where the first direction X is the extension direction of the heat dissipation duct 10. The heat dissipation assembly 11 includes a plurality of first fins 111 and a plurality of second fins 112. The plurality of first fins 111 are arranged at intervals along a second direction Y in the first region 101 and extend along the first direction X, where the first direction X intersects the second direction Y. The plurality of second fins 112 are arranged at intervals along the second direction Y in the second region 102 and extend along the first direction X. The number of first fins 111 per unit volume is less than the number of second fins 112.

[0052] It is important to understand that by dividing the heat dissipation duct 10 into a first region 101 and a second region 102, and employing a differential arrangement density of the first fins 111 and the second fins 112 per unit volume (with the density of the first fins 111 being less than that of the second fins 112), a heat dissipation gradient structure is formed along the first direction X. When the heat exchange medium flows along the first direction X, the relatively sparse first fins 111 reduce the flow resistance of the medium, ensuring the flow rate and initial velocity of the heat exchange medium entering the heat dissipation duct 10. As the heat exchange medium enters the second region 102, the larger number of second fins 112 per unit volume further disperses the heat exchange medium, improving its fluidity and increasing the contact surface with the medium. This enhances the heat exchange capacity between the heat dissipation component 11 and the heat exchange medium, effectively balancing heat dissipation performance and wind resistance pressure, improving the uniformity of airflow distribution, and significantly improving overall heat dissipation efficiency.

[0053] Please see Figure 2As shown, in some embodiments, the heat dissipation duct 10 further has a third region 103 arranged along the first direction X. The third region 103 is located on the side of the second region 102 away from the first region 101, and the third region 103 is connected to the second region 102. The heat dissipation assembly 11 also includes a plurality of third fins 113, which are arranged at intervals along the second direction Y in the third region 103 and extend along the first direction X. The number of third fins 113 per unit volume is less than the number of second fins 112. It is important to understand that by adding a third region 103, the heat dissipation duct 10 forms a three-level heat dissipation gradient structure along the first direction X. The heat exchange medium passes sequentially through the first region 101, the second region 102, and the third region 103, extending the effective airflow path, increasing the contact time between the airflow and the fins, and enhancing the heat exchange effect. The multi-level gradient design can effectively reduce the peak heat flux density, avoid local overheating, and adapt to the heat dissipation needs of different regions. Lower fin densities are used in regions with lower heat flux densities, while higher fin densities are used in regions with higher heat flux densities, while improving the overall heat dissipation uniformity. Through the differentiated arrangement density of the third fin 113 and the second fin 112 per unit volume, with the density of the third fin 113 being lower than that of the second fin 112, airflow resistance is effectively balanced to guide the heat exchange medium to flow more uniformly within the third region 103.

[0054] Please see Figure 2 As shown, in some embodiments, along the extension direction of the heat dissipation duct 10, the first region 101 has a length dimension L1, and the third region 103 has a length dimension L3, satisfying L1 > L3. It should be understood that the larger length dimension of the first region 101 can provide a higher heat load and a longer flow path for the heat exchange medium, reducing the kinetic energy decay rate and ensuring the kinetic energy of the heat exchange medium entering the second region 102 and the third region 103. Conversely, the smaller length dimension of the third region 103 can prevent heat retention, ensuring rapid heat dissipation in the terminal region and maintaining high convective heat transfer efficiency. Furthermore, the smaller length dimension L3 of the third region 103 can prevent excessive elongation of the heat dissipation device 1, maintaining structural compactness while reducing material costs and manufacturing difficulty.

[0055] Please see Figure 3As shown, in some embodiments, the heat dissipation device 1 further includes a heat-conducting element 12 connected to one side of the heat dissipation assembly 11 for heat exchange with the first fin 111, the second fin 112, and the third fin 113. It should be understood that the heat-conducting element 12 transfers the heat generated by the device to the fins, greatly shortening the heat transfer path and accelerating heat collection. Simultaneously, the heat-conducting element 12 can evenly distribute heat to each fin, improving overall heat dissipation efficiency. The heat-conducting element 12 connects the first fin 111, the second fin 112, and the third fin 113, forming an organic whole and improving the fins' coordinated working ability. As a key link connecting the heat source and the heat dissipation fins, the heat-conducting element 12 completes the heat transfer chain of the entire heat dissipation device 1, making the heat transfer process from the heat source to the heat exchange medium smoother and more efficient, overcoming the potential heat transfer bottleneck problem that may exist when relying solely on fin heat dissipation, and improving the overall performance of the heat dissipation device 1.

[0056] Please see Figure 5 As shown, in some embodiments, the heat dissipation device 1 further includes a substrate 13 and a heat pipe 14. The substrate 13 is connected to the side of the heat-conducting element 12 away from the heat dissipation assembly 11, and is connected to the first fin 111, the second fin 112, and the third fin 113, respectively. The heat pipe 14 is embedded in the substrate 13 and connected to the heat-conducting element 12. It should be understood that by connecting the heat-conducting element 12 to the substrate 13 and connecting it to the first fin 111, the second fin 112, and the third fin 113, a highly efficient heat conduction network is formed. The substrate 13, as a diffusion layer, can evenly distribute the heat generated by the heat source to the heat dissipation assembly 11, avoiding the formation of local hot spots and optimizing the uniformity of the heat field distribution. At the same time, the substrate 13 also provides structural support for the heat dissipation assembly 11, enhancing the overall strength and stability of the heat dissipation device 1. The heat pipe 14 is embedded in the substrate 13 and connected to the heat conductor 12, which can quickly transfer heat from the heat source to the substrate 13 and the heat dissipation component 11. The high thermal conductivity of the heat pipe 14 significantly reduces the thermal resistance of the heat conduction path. At the same time, the embedded design of the heat pipe 14 can effectively protect the heat pipe 14, avoid the problem of mechanical damage that traditional external heat pipes 14 are susceptible to, and improve the reliability and durability of the heat dissipation device 1.

[0057] Please see Figure 5As shown, in some embodiments, the heat dissipation device 1 includes multiple heat pipes 14, the extension direction of which is the same as the first direction X, and the multiple heat pipes 14 are arranged at intervals along the second direction Y. It should be understood that the extension direction of the heat pipes 14 is the same as the extension direction of the heat dissipation duct 10 (i.e., the first direction X). The multiple heat pipes 14 arranged at intervals along the second direction Y provide multiple paths for heat transfer, allowing the heat generated by the heat source to be transferred through the heat conductor 12 to the heat pipes 14 at different locations and along different paths. This results in a more uniform distribution of heat to the entire substrate 13 and heat dissipation fins, effectively reducing the formation of local hot spots and improving the uniformity of heat dissipation in the second direction Y of the entire heat dissipation device 1. The arrangement of multiple heat pipes 14 improves the fault tolerance of the heat dissipation device 1, preventing the heat dissipation device 1 from malfunctioning due to the damage of a single heat pipe 14, thus improving the reliability and stability of the heat dissipation device 1.

[0058] Please see Figure 4 and Figure 5 As shown in the embodiments, this application also discloses an energy storage system, including a heat dissipation device 1 and a battery pack 2 as described in the above embodiments. The heat dissipation device 1 is used to dissipate heat from the battery cells 20. The battery pack 2 includes multiple battery cells 20, which are arranged in multiple rows along a second direction Y, with each row having multiple battery cells 20. The multiple battery cells 20 are arranged along a first direction X. It should be understood that the heat dissipation duct 10 matches the arrangement direction of the battery cells 20, and the fins are consistent with the distribution direction of the rows of battery cells 20, thereby enabling targeted heat dissipation for each battery cell 20, effectively improving the accuracy and efficiency of heat dissipation. The close cooperation between the heat dissipation device 1 and the battery pack 2 avoids space waste caused by unreasonable layout of the heat dissipation device 1, helps to reduce the overall volume of the energy storage system, and improves space utilization.

[0059] Please see Figure 5As shown, in some embodiments, the battery cell 20 has two first surfaces 201 arranged at intervals along a third direction, with the third direction, the second direction Y, and the first direction X intersecting each other. The terminal post 21 of the battery cell 20 is disposed on one of the first surfaces 201, and the heat dissipation device 1 is disposed on the other first surface 201. It should be understood that placing the heat dissipation device 1 on the other first surface 201 opposite to the first surface 201 where the battery cell 20's terminal post 21 is located effectively avoids the impact of hot airflow or temperature changes generated during heat dissipation on the terminal post 21, keeping the terminal post 21 in a relatively stable environment, ensuring the reliability of the electrical connection, and improving the safety of the energy storage system. At the same time, the heat dissipation path is more direct and efficient, reducing obstacles in the heat transfer process, avoiding heat accumulation, and reducing the risk of thermal runaway. In addition, the terminal post 21 and the heat dissipation device 1 are respectively located on two opposite first surfaces 201 of the battery cell 20, making the internal structural layout of the energy storage system more compact and regular, which helps to reduce the overall volume of the energy storage system and improve space utilization. On the other hand, the operating spaces of the pole post 21 and the heat dissipation device 1 are independent of each other, which improves the convenience of maintenance and repair and reduces maintenance costs.

[0060] Please see Figure 6 As shown, in some embodiments, the battery cell 20 has two first surfaces 201 arranged at intervals along a third direction and two second surfaces 202 arranged at intervals along a second direction Y. The third direction, the second direction Y, and the first direction X intersect each other. The electrode post 21 of the battery cell 20 is disposed on the second surface 202; at least one first surface 201 is provided with a heat dissipation device 1. It should be understood that the electrode post 21 is disposed on the second surface 202, and the heat dissipation device 1 is disposed on at least one first surface 201, so that the heat generated by the battery cell 20 during operation can be quickly transferred to the heat dissipation device 1 through the shortest path, reducing the detour of heat transfer inside the battery cell 20, reducing energy loss during heat transfer, and improving heat dissipation efficiency. At the same time, it makes the overall temperature distribution of the battery cell 20 more uniform, reduces local overheating, and improves the thermal stability of the battery cell 20. When both first surfaces 201 are provided with heat dissipation devices 1, the heat dissipation efficiency of the battery cell 20 is maximized, and the safety and reliability of the energy storage system are higher.

[0061] Please see Figure 5As shown, in some embodiments, the heat dissipation device 1 includes multiple heat pipes 14, with at least one heat pipe 14 corresponding to each row of battery cells 20, and the number of heat pipes 14 is the same for each row of battery cells 20. It should be understood that the heat generated by each row of battery cells 20 during operation is similar. Configuring the same number of heat pipes 14 for each row allows the heat pipes 14 to precisely dissipate heat according to the heating characteristics of each row of battery cells 20, ensuring that the heat from each row of battery cells 20 is transferred effectively and promptly. This avoids excessively high temperatures due to insufficient heat dissipation in a particular row of battery cells 20, which could affect the performance of the entire battery pack 2 and help improve the temperature consistency between rows of battery cells 20. The multiple heat pipes 14 corresponding to each row of battery cells 20 provide more channels for heat transfer, significantly improving heat dissipation efficiency. Furthermore, multiple heat pipes 14 corresponding to one row of battery cells 20 improve system reliability and stability, enhancing the fault tolerance of the heat dissipation device 1.

[0062] Please see Figure 7 As shown, in some embodiments, the energy storage system includes a housing 3, multiple battery packs 2, a duct plate 4, and a cooling device 5. The housing 3 has a chamber 30 for storing the battery packs 2. A heat dissipation device 1 is disposed between two adjacent battery packs 2. The duct plate 4 divides the interior of the chamber 30 to form an air inlet channel 301 and an air outlet channel 302. A through hole 40 is provided on the duct plate 4. The air inlet channel 301 is connected to the inlet of the heat dissipation duct 10 through the through hole 40, and the air outlet channel 302 is connected to the outlet of the heat dissipation duct 10. The cooling device 5 has an air outlet 501 and a return air outlet 502. The air outlet 501 is connected to the air inlet channel 301, and the return air outlet 502 is connected to the air outlet channel 302. It is important to understand that the air outlet 501 of the cooling device 5 is connected to the air inlet channel 301, and the air return outlet 502 is connected to the air outlet channel 302. This allows cooled air to enter the heat dissipation air duct 10 through the air inlet channel 301, the through hole 40 of the air duct plate 4, exchange heat with the heat dissipation device 1, remove heat, and then return to the cooling device 5 through the air outlet channel 302. This circulating design continuously provides low-temperature air to the heat dissipation device 1, greatly improving heat dissipation efficiency and ensuring that the battery pack 2 is always within a suitable operating temperature range. The air duct plate 4 divides the chamber 30 into the air inlet channel 301 and the air outlet channel 302, and connects to the heat dissipation air duct 10 through the through hole 40, precisely guiding the airflow direction. Cold air can directly enter the heat dissipation air duct 10, making full contact with the heat dissipation device 1 of the battery pack 2, and specifically dissipating heat from the battery pack 2. Compared with a design without the air duct plate 4, this reduces disordered airflow and heat mixing, improving the precision and effectiveness of heat dissipation.

[0063] Specifically, the heat dissipation device 1 is placed between two adjacent battery packs 2, effectively utilizing the space between the battery packs 2 and making the internal layout of the energy storage system more compact. This layout not only helps to reduce the overall size of the energy storage system but also ensures that each battery pack 2 can be cooled in a timely manner. At the same time, the compact layout also helps to improve the structural stability of the energy storage system and facilitates installation and transportation. The chamber 30 of the housing 3 provides physical protection for the battery packs 2, protecting them from external physical damage. In addition, placing multiple battery packs 2 together in the chamber 30 facilitates unified management and maintenance of the battery packs 2. Maintenance personnel can easily enter the chamber 30 to inspect, repair, and replace the battery packs 2 and the heat dissipation device 1.

[0064] Please see Figure 8 As shown, in some embodiments, an adjusting valve 6 is also included. The adjusting valve 6 is disposed within the through hole 40 and is used to adjust the size of the through hole 40. It should be understood that the adjusting valve 6 is disposed within the through hole 40, and the size of the through hole 40 can be flexibly adjusted according to the actual operating conditions of the battery pack 2. When the battery pack 2 is in a high-power charging and discharging state and generates a lot of heat, the area of ​​the through hole 40 is increased, allowing more cool air to enter the heat dissipation duct 10, enhancing the heat dissipation effect, and ensuring that the temperature of the battery pack 2 does not become too high. When operating at low power or in a low ambient temperature, the area of ​​the through hole 40 is reduced, reducing the flow of cool air, preventing the temperature of the battery pack 2 from dropping excessively, maintaining a suitable operating temperature, and improving the adaptability of the heat dissipation system to different operating conditions. By precisely adjusting the air flow, unnecessary cooling energy consumption is avoided. When a large amount of heat dissipation is not required, the amount of cool air entering is reduced, reducing the load on the cooling device 5 and saving energy. Furthermore, by adjusting the valves of the corresponding through holes 40 to meet the heat dissipation requirements of battery packs 2 at different locations, the airflow distribution can be optimized to ensure that the temperature of each battery pack 2 is consistent, thereby reducing the problem of inconsistent battery performance caused by temperature differences and extending the overall service life of battery pack 2.

[0065] On the other hand, regulating valve 6 provides maintenance personnel with a visual inspection point. When the energy storage system experiences abnormal heat dissipation, checking the valve status can help determine whether the airflow regulation is normal, thus assisting in quickly locating the fault.

[0066] Please see Figure 9As shown, in some embodiments, multiple battery packs 2 are arranged at intervals along a third direction. The cooling device 5 is disposed on the side wall of the housing 3 in the first direction X or the second direction Y, and is located on the side of the air outlet duct 302 away from the battery packs 2. The air inlet duct 301 is at least partially located between the cooling device 5 and the battery packs 2. It should be understood that by changing the layout position of the cooling device 5 and placing it on the side wall of the housing 3, the space of the side wall of the chamber 30 is cleverly utilized, avoiding excessive space occupation within the chamber 30. This allows multiple battery packs 2 to be compactly arranged along a third direction within the chamber 30. This not only improves the utilization rate of the space within the chamber 30, but also makes the structure of the entire energy storage system more compact, which is beneficial for reducing the overall volume of the energy storage system and making it more flexible during installation and use. Placing the cooling device 5 on the side wall of the housing 3 provides a relatively independent and easily accessible location. When maintenance, repair, or replacement of components is required for the cooling device 5, maintenance personnel can operate conveniently without large-scale disassembly of the battery packs 2 or other complex internal structures, reducing maintenance costs and difficulty, and improving the maintainability of the energy storage system.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] The above provides a detailed description of a heat dissipation device and energy storage system provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat dissipating device, characterized by, The heat dissipation device (1) comprises a heat dissipation assembly (11) having a heat dissipation air duct (10), the heat dissipation air duct (10) comprising a first area (101) and a second area (102) arranged in a first direction (X) and communicated, the first direction (X) being the extension direction of the heat dissipation air duct (10); The heat dissipation assembly (11) comprises: a plurality of first fins (111) arranged in a second direction (Y) in the first area (101) and extending in the first direction (X), the first direction (X) intersecting the second direction (Y); a plurality of second fins (112) arranged in the second direction (Y) in the second area (102) and extending in the first direction (X); The number of the first fins (111) per unit volume is less than the number of the second fins (112).

2. The heat dissipating device according to claim 1, wherein The heat dissipation air duct (10) further has a third area (103) arranged in the first direction (X), the third area (103) being located on the side of the second area (102) away from the first area (101), and the third area (103) being communicated with the second area (102); The heat dissipation assembly (11) further comprises a plurality of third fins (113) arranged in the second direction (Y) in the third area (103) and extending in the first direction (X); The number of the third fins (113) per unit volume is less than the number of the second fins (112).

3. The heat dissipating device of claim 2, wherein In the extension direction of the heat dissipation air duct (10), the first area (101) has a length dimension L1, and the third area (103) has a length dimension L3, satisfying L1>L3.

4. The heat dissipating device of claim 2, wherein The heat dissipation device (1) further comprises a heat conduction member (12) connected to one side of the heat dissipation assembly (11) for heat exchange with the first fins (111), the second fins (112) and the third fins (113).

5. The heat dissipating device of claim 4, wherein The heat dissipation device (1) further comprises: a substrate (13) connected to the side of the heat conduction member (12) away from the heat dissipation assembly (11) and connected to the first fins (111), the second fins (112) and the third fins (113) respectively; a heat pipe (14) embedded in the substrate (13) and connected to the heat conduction member (12).

6. The heat dissipating device of claim 5, wherein The heat dissipation device (1) comprises a plurality of heat pipes (14), the extension direction of the heat pipes (14) being the same as the first direction (X), and the plurality of heat pipes (14) being arranged in the second direction (Y) at intervals.

7. An energy storage system characterized by, The heat dissipation device (1) for dissipating heat from an electric core (20) as claimed in any one of claims 1 to 6; ​ The battery pack (2) comprises a plurality of battery cells (20), and the plurality of battery cells (20) are arranged in a plurality of columns along the second direction (Y), and each column is provided with a plurality of battery cells (20), and the plurality of battery cells (20) are arranged along the first direction (X).

8. The energy storage system of claim 7, wherein, The battery cell (20) has two first surfaces (201) arranged in a relative interval along a third direction, the third direction, the second direction (Y) and the first direction (X) intersect with each other, and the pole (21) of the battery cell (20) is arranged on one of the first surfaces (201), and the heat dissipation device (1) is arranged on the other first surface (201).

9. The energy storage system of claim 7, wherein, The battery cell (20) has two first surfaces (201) arranged in a relative interval along a third direction and two second surfaces (202) arranged in a relative interval along a second direction (Y), the third direction, the second direction (Y) and the first direction (X) intersect with each other, and the pole (21) of the battery cell (20) is arranged on the second surface (202). At least one of the first surfaces (201) is provided with the heat dissipation device (1).

10. The energy storage system of claim 7, wherein, The heat dissipation device (1) comprises a plurality of heat pipes (14), and each column of battery cells (20) is provided with at least one heat pipe (14), and the number of heat pipes (14) arranged in each column of battery cells (20) is the same.

11. The energy storage system of claim 7, wherein, The energy storage system comprises: A shell (3) has a cavity (30) for storing the battery pack (2); A plurality of battery packs (2) are arranged between adjacent battery packs (2); An air duct plate (4) divides the cavity (30) into an air inlet channel (301) and an air outlet channel (302), and a through hole (40) is formed in the air duct plate (4), the air inlet channel (301) is communicated with the inlet of the heat dissipation air duct (10) through the through hole (40), and the air outlet channel (302) is communicated with the outlet of the heat dissipation air duct (10). A refrigeration device (5) has an air outlet (501) and an air return (502), the air outlet (501) is communicated with the air inlet channel (301), and the air return (502) is communicated with the air outlet channel (302).

12. The energy storage system of claim 11, wherein, Further comprising an adjusting valve (6) arranged in the through hole (40) for adjusting the size of the through hole (40).

13. The energy storage system of claim 11, wherein, A plurality of battery packs (2) are arranged in a relative interval along a third direction, the refrigeration device (5) is arranged on the side wall of the shell (3) in the first direction (X) or the second direction (Y), and is located on the side of the air outlet channel (302) away from the battery pack (2), and the air inlet channel (301) is at least partially located between the refrigeration device (5) and the battery pack (2).

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