Air-cooled energy storage battery pack

Abstract

The utility model relates to the technical field of energy storage batteries, and discloses an air-cooled energy storage battery pack which comprises a box body, a battery cell module and a mainboard, the box body is provided with a cavity; the battery cell module is mounted in a first area in the cavity; the mainboard is mounted in a second area in the cavity; a first air inlet is formed in the outer wall, close to the first area, of the box body, an air outlet is formed in the outer wall, close to the second area, of the box body, a heat dissipation channel leading to the second area from the first area is arranged in the box body, and a first air supply device is arranged in the heat dissipation channel. Cold air is introduced into the first area where the battery cell module is located through the first air inlet to dissipate heat of the high-capacity battery cell, then the cold air is driven by the first air supply device to flow to the second area where the mainboard is installed along the heat dissipation channel to dissipate heat of the mainboard power device, and finally the cold air is discharged out of the box body through the air outlet. A complete air-cooling heat dissipation path is formed, and the defect that the thermal performance of the battery is affected by heating of a power device of the mainboard is overcome.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to an air-cooled energy storage battery pack. Background Technology

[0002] Currently, in air-cooled battery packs, the battery motherboard and the battery cells are integrated into the same enclosure. During use, the heat generated by the power devices on the motherboard inside the enclosure affects the thermal performance of the battery. For large-capacity battery cells, the heat generation increases, and the area of ​​the battery cells that can be cooled by air cannot be increased effectively. This results in low heat dissipation efficiency of the air-cooled battery pack, which cannot dissipate heat in time and faces the risk of excessively high battery cell temperature. Utility Model Content

[0003] In view of this, the present invention provides an air-cooled energy storage battery pack, which aims to solve the defect of existing air-cooled energy storage batteries in which the power devices of the mainboard are integrated with the battery cells in the same box, and the heat generated by the mainboard affects the thermal performance of the battery.

[0004] This utility model provides an air-cooled energy storage battery pack, including a housing, a cell module, and a motherboard; the housing has a cavity; the cell module is installed in a first region within the cavity; the motherboard is installed in a second region within the cavity; a first air inlet is provided on the outer wall of the housing corresponding to the first region, and an air outlet is provided on the outer wall of the housing near the second region; the housing has a heat dissipation channel leading from the first region to the second region, and a first air supply device is provided within the heat dissipation channel.

[0005] By designing a cavity-like enclosure, independent and enclosed installation spaces are provided for the battery cell modules and the motherboard, allowing them to operate in a relatively stable environment and avoiding interference from external factors. This stable operating environment improves the overall structural reliability and safety. By installing the battery cell modules in the first area of ​​the cavity and the motherboard in the second area, functional areas are clearly defined. This prevents the heat generated by the motherboard's power devices from affecting the battery cell modules, facilitates optimized wiring connections and layout, reduces signal interference and line losses, and improves the electrical performance of the battery pack through rational area planning. Furthermore, the enclosure and the first area... The corresponding outer wall is provided with a first air inlet, and the outer wall near the second area is provided with an air outlet. A heat dissipation channel from the first area to the second area is constructed in the box and a first air supply device is installed, forming a complete air-cooling heat dissipation path. This allows cold air to enter from the first air inlet, flow through the cell module to remove heat, and then flow through the heat dissipation channel to the motherboard area, and finally be discharged from the air outlet. By constructing an effective heat dissipation path, the heat dissipation efficiency is greatly improved, effectively solving the heat dissipation problem caused by the heat generation of the motherboard power devices and the heat generated by the large-capacity cells, reducing the risk of excessive cell temperature, and ensuring the stable operation of the battery pack under different operating conditions.

[0006] Optionally, the first region is located below the second region.

[0007] By placing the first region below the second region, the cell module is positioned below the motherboard. During battery pack operation, utilizing the principle of natural hot air rising, the hot air generated by the cell module can flow upwards smoothly. By rationally utilizing the upward characteristic of hot air, thermal interference from the motherboard area to the cell module is reduced, and excessive heat accumulation at the bottom of the cell module can be avoided, thus ensuring stable operation and reducing the risk of failure due to high temperatures. Furthermore, as the hot air flows upwards, it can exchange heat with cold air along predetermined paths such as heat dissipation channels before being exhausted from the enclosure. By optimizing the hot air flow path, the heat dissipation efficiency of the entire air-cooled energy storage battery pack is improved, effectively solving the heat dissipation problem caused by heat generated by the cell module, reducing the possibility of excessively high cell temperatures, and thus improving the reliability and safety of the battery pack under different operating conditions.

[0008] Optionally, the battery cell modules are arranged in at least two groups side by side in the housing, and the heat dissipation channel is arranged between two adjacent groups of battery cell modules.

[0009] By arranging at least two sets of cell modules side-by-side within the housing and placing heat dissipation channels between adjacent sets, the performance of the air-cooled energy storage battery pack is improved in multiple ways. The parallel arrangement of multiple cell modules increases the overall capacity of the cells, enhancing the energy storage capacity of the battery pack. The heat dissipation channels between adjacent sets effectively dissipate heat generated by each cell module. Cool air enters through the first air inlet and fully absorbs heat within the channels, preventing excessive heat accumulation in localized areas. This optimized heat dissipation layout enhances the uniformity of heat dissipation among the cell modules, ensuring consistent performance across all modules and improving the overall reliability and stability of the battery pack. Furthermore, this layout allows for more efficient use of the internal space. Properly planned internal space facilitates the connection and collaborative operation of cell modules with other components such as the motherboard and air supply system, improving the compactness and rationality of the overall battery pack structure. This promotes stable operation under various working conditions and reduces the impact of poor heat dissipation on battery performance.

[0010] Optionally, a second air inlet is provided on the outer wall of the enclosure corresponding to the second region. Both the second air inlet and the first air inlet are located on the back of the enclosure, with the second air inlet facing the back of the motherboard.

[0011] By incorporating a second air inlet facing the back of the motherboard on the outer wall of the enclosure, corresponding to the second area, significant technical benefits are achieved during the operation of the air-cooled energy storage battery pack. Through this second air inlet, cool outside air can directly act on the back of the motherboard. When the motherboard generates heat due to the operation of power devices, the cool air can quickly exchange heat with it. By providing an independent cooling source for the motherboard, the rate of temperature rise is effectively reduced, preventing overheating from affecting its performance and stability, and ensuring that the motherboard operates within its normal temperature range. Simultaneously, in conjunction with air inlets and heat dissipation channels in other locations within the enclosure, the overall heat dissipation path within the enclosure becomes more diverse. By optimizing the combination of heat dissipation paths, the overall heat dissipation capacity of the battery pack is enhanced, improving heat dissipation efficiency. This better solves the heat dissipation problems caused by the combined heat generation of the motherboard power devices and the heat generated by the large-capacity cells, ensuring that the battery pack maintains good thermal performance under different operating conditions and reducing the negative impact of poor heat dissipation on the overall performance of the battery pack.

[0012] Optionally, the air outlet is located on the side of the housing, and a second air supply device is provided at the air outlet.

[0013] The side-mounted air outlets allow for a more efficient and smoother path for hot air exhaust, preventing unnecessary heat buildup within the battery pack and facilitating rapid heat dissipation. The addition of a secondary air supply device enhances the airflow at the outlets, accelerating the outward flow of hot air and further improving heat dissipation efficiency. This effectively addresses the increased heat generation from large-capacity battery cells, preventing overheating and ensuring the overall stability of the battery pack. It also better solves the problem of poor heat dissipation affecting battery thermal performance in existing air-cooled battery packs.

[0014] Optionally, the battery cell module has multiple battery cells arranged in parallel and spaced apart on a large surface, and the spacing between adjacent battery cells is suitable for ventilation.

[0015] By arranging multiple cells in the battery module with their large surfaces parallel and spaced apart, and ensuring adequate ventilation between adjacent cells, excellent conditions are created for heat dissipation within the cells themselves. During battery pack operation, the heat generated by the cells can be rapidly dissipated through the gaps between adjacent cells, increasing the contact area between the cells and the air, and making heat exchange more efficient. For example, under high load operation, sufficient ventilation space allows cool air to quickly carry away heat, effectively reducing cell temperature and minimizing cell performance degradation caused by overheating, such as capacity decay and increased internal resistance. This ensures stable cell operation, extends their service life, and ultimately improves the reliability of the entire battery pack. This clever combination of cell layout and the first air inlet of the enclosure further optimizes the overall heat dissipation efficiency within the enclosure. Because the multiple strip-shaped openings of the first air inlet correspond one-to-one with the gaps between adjacent cells, cool outside air can precisely enter the cell gaps. Under the action of the first air supply device, the cold air fully absorbs heat in the interval to form hot air, and then flows along the heat dissipation channel to the motherboard area and is discharged from the air outlet, making the heat transfer in the box more orderly and efficient. It constructs a reasonable heat dissipation path from the cell module to the motherboard area, effectively solves the heat dissipation problem of large-capacity cells, avoids the risk of excessive cell temperature, and maintains the stable performance of the battery pack under different operating conditions.

[0016] Optionally, the first air inlet includes a plurality of spaced-apart strip-shaped openings, with each strip-shaped opening corresponding to the spacing between adjacent battery cells.

[0017] By configuring the first air inlet as multiple spaced-out strips, with each strip corresponding to a specific gap between adjacent cells, several positive technical effects are achieved. This corresponding arrangement allows cool outside air to enter precisely and systematically into the gaps between adjacent cells within the battery module. During battery pack operation, cool air flows smoothly along these corresponding channels, making full contact with the cells and efficiently removing the heat generated by them. This enhanced heat exchange improves the heat dissipation efficiency of the battery module, preventing cells from overheating due to heat accumulation. This ensures the cells operate within a suitable temperature range, maintaining stable performance and effectively solving the problem of high heat generation and difficult heat dissipation in large-capacity cells. This structural layout also further optimizes the overall heat dissipation path within the casing. Cold air enters through the corresponding slots, participates in heat exchange between the cells, and then flows along predetermined paths such as the heat dissipation channels. This makes the heat transfer within the pack more rational and orderly. In coordination with other heat dissipation components, it improves the heat dissipation efficiency of the entire air-cooled energy storage battery pack, reduces the occurrence of situations where poor heat dissipation affects the battery's thermal performance, and enhances the reliability and stability of the battery pack under different operating conditions.

[0018] Optionally, multiple battery cells in the battery cell module are arranged sequentially along the height direction of the housing.

[0019] By arranging multiple battery cells sequentially along the height of the housing within the battery cell module, several beneficial technical effects are achieved. This arrangement allows for an orderly arrangement of cells within a limited housing space, resulting in a more compact and rational battery module structure. Optimizing the cell layout fully utilizes the vertical space of the housing, improving space utilization and helping to reduce the overall size of the battery pack, enhancing product portability and applicability. In terms of heat dissipation, this vertical arrangement facilitates a stable and continuous heat transfer path. When a cell generates heat during operation, the heat can be smoothly conducted upwards or downwards along the vertical direction. Combined with the housing's first air inlet, heat dissipation channels, and air outlets, the flow and exchange of cold and hot air within the housing is more orderly. By promoting heat conduction and convection, the overall heat dissipation efficiency of the battery cell module is improved, effectively preventing excessive local heat accumulation, ensuring uniform cell temperature, and reducing inconsistencies in cell performance caused by excessive temperature differences. This maintains the overall stability and reliability of the battery pack, better meeting the heat dissipation requirements of large-capacity cells and solving the problem of poor heat dissipation affecting battery thermal performance.

[0020] Optionally, the box is rectangular, with its largest face vertically positioned and its smallest face horizontally positioned.

[0021] By designing the enclosure as a rectangle, with the largest surface vertical and the smallest surface horizontal, a series of positive technical effects are achieved. This enclosure shape and surface layout provides a more rational spatial architecture for components such as battery modules and motherboards within the enclosure, in terms of installation and layout. Battery modules and motherboards can be more optimized in layered arrangement within this vertically laid-out enclosure according to their respective functional requirements and heat dissipation needs. Through rational planning of the internal space, the connection lines between components are laid out more neatly and orderly, reducing the risk of wire tangling and interference, and improving assembly efficiency and maintenance convenience. In terms of heat dissipation efficiency, the vertically positioned largest surface facilitates the natural upward expulsion of hot air. When hot air is generated inside the enclosure, it can rise smoothly along the vertical plane. Combined with the air outlets and secondary air supply device on the side, the hot air can be discharged more quickly. By optimizing the hot air flow path, the overall heat dissipation effect is enhanced, heat is prevented from accumulating inside the enclosure, and the thermal stability of the battery pack during operation is effectively guaranteed. This reduces the possibility of cell overheating or motherboard performance being affected due to poor heat dissipation, improves the reliability of the air-cooled energy storage battery pack under different operating conditions, and better solves the problems faced by the imperfect heat dissipation design of existing air-cooled battery packs.

[0022] Optionally, the housing includes a top cover that is detachably attached to the largest surface of the housing.

[0023] The detachable top cover design allows for convenient installation of internal components such as cell modules and motherboards into the battery pack assembly process. This simplifies the assembly process, improves production efficiency, and reduces assembly difficulty and costs. During maintenance and repair, the top cover can be easily removed to directly inspect, repair, or replace critical components such as cell modules, motherboards, and heat dissipation channels without complex disassembly procedures. This convenience reduces maintenance time and labor costs, enhancing product maintainability and lifespan. Regarding heat dissipation, the detachable top cover provides a convenient access window when monitoring or adjusting the internal heat dissipation. For example, during heat dissipation performance optimization testing, the top cover can be easily opened to evaluate and improve the internal air supply system, heat dissipation channels, and the layout of various components. This facilitates heat dissipation optimization, further improving the heat dissipation efficiency of the air-cooled energy storage battery pack, better addressing the issue of poor heat dissipation affecting battery thermal performance, and ensuring stable and reliable operation of the battery pack under various operating conditions. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of an air-cooled energy storage battery pack according to an embodiment of the present utility model;

[0026] Figure 2 This is an exploded view of the internal structure of an air-cooled energy storage battery pack according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0028] Figure 4 for Figure 2 A schematic diagram of the front structure of the box;

[0029] Figure 5 for Figure 2 A schematic diagram of the rear structure of the box;

[0030] Figure 6 This is a wind speed flow diagram of an embodiment of the present utility model of an air-cooled energy storage battery pack;

[0031] Figure 7 for Figure 6 Side view.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Housing; 2. Cavity; 3. Battery cell module; 4. First area; 5. Main board; 6. Second area; 7. First air inlet; 8. Air outlet; 9. Heat dissipation channel; 10. First air supply device; 11. Second air inlet; 12. Second air supply device; 13. Battery cell; 14. Strip-shaped opening; 15. Top cover. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] like Figure 1 and Figure 2 As shown, in the field of energy storage battery technology, the mainboard 5 and the battery cell 13 of the current air-cooled battery pack are usually integrated in the same housing 1. During use, the heat generated by the power devices on the mainboard in the housing 1 will affect the thermal performance of the battery. For large-capacity battery cells 13, the heat generation increases, but the area of ​​the air-cooled battery cells 13 cannot be effectively increased, resulting in low heat dissipation efficiency of the air-cooled battery pack, difficulty in timely heat dissipation, and the risk of excessively high temperature of the battery cells 13.

[0036] This embodiment addresses the shortcomings of existing air-cooled energy storage batteries where the power devices on the mainboard 5 generate heat, affecting the battery's thermal performance, by integrating the mainboard 5 and the battery cell 13 into the same housing 1. A new air-cooled energy storage battery pack is proposed.

[0037] like Figure 1 and Figure 2 As shown, the air-cooled energy storage battery pack provided in this embodiment mainly includes a housing 1, a cell module 3, and a mainboard 5.

[0038] In this embodiment, the basic structural components of the air-cooled energy storage battery pack are defined, including a housing 1 with a cavity 2. The housing 1 is divided into a first region 4 for installing the cell module 3 and a second region 6 for installing the motherboard 5. A first air inlet 7 is provided on the outer wall of the housing 1 corresponding to the first region 4, and an air outlet 8 is provided on the outer wall near the second region 6. A heat dissipation channel 9 is constructed inside the housing 1, leading from the first region 4 to the second region 6, and a first air supply device 10 is provided within the heat dissipation channel 9.

[0039] Specifically, by installing the cell module 3 and the motherboard 5 in different areas within the housing 1, the direct impact of the heat generated by the power devices on the motherboard 5 on the thermal performance of the cell 13 is effectively avoided. This makes the thermal environments of the cell 13 and the motherboard 5 relatively independent, reducing thermal interference and helping to maintain the cell 13 operating within a suitable temperature range, thereby improving the overall thermal stability and safety of the battery pack. For example, during prolonged high-load operation, the heat generated by the motherboard 5 will not be rapidly conducted to the cell module 3, reducing the risk of abnormal temperature rise in the cell 13 due to overheating of the motherboard 5, thus extending the lifespan of the cell 13 and ensuring stable battery performance output. Furthermore, the heat dissipation channel 9, which connects the first area 4 (where the cell module 3 is located) to the second area 6 (where the motherboard 5 is located) and the first air supply device 10 within the housing 1, constructs a dedicated heat conduction and dissipation path. When the battery pack is working, the first air supply device 10 is activated, which allows air to enter the cell module 3 area from the first air inlet 7, carrying away the heat generated by the cell 13. Subsequently, the hot air flows along the heat dissipation channel 9 to the motherboard 5 area and is finally discharged from the air outlet 8. In this way, not only can the heat dissipation of the cell module 3 be efficiently improved to prevent it from overheating due to heat accumulation, but the hot air flow can also be used to dissipate heat for the motherboard 5, achieving coordinated heat dissipation for the cell module 3 and the motherboard 5. Compared with the traditional structure without a dedicated heat dissipation channel 9 and air supply device, this greatly improves the heat dissipation efficiency, dissipates heat more promptly, and reduces the risk of performance degradation or even failure of the entire battery pack due to insufficient heat dissipation. Meanwhile, a first air inlet 7 is provided on the outer wall of the housing 1 corresponding to the first area 4, and an air outlet 8 is provided on the outer wall near the second area 6. This layout allows the heat dissipation airflow to flow in an orderly manner according to the designed path. After entering from the first air inlet 7, the cold air first contacts the cell module 3, which can carry out effective heat exchange at the source of heat generation, minimizing the temperature of the cell 13. After passing through the heat dissipation channel 9, the air carrying the heat of the motherboard 5 is discharged from the air outlet 8, ensuring that the heat can be smoothly discharged from the housing 1, avoiding the backflow or local accumulation of hot air in the housing 1, further optimizing the heat dissipation effect, making the temperature distribution inside the battery pack more uniform, and improving the reliability and stability of the battery pack under different operating conditions.

[0040] It should be noted that this embodiment does not limit the positional relationship between the first region 4 and the second region 6, nor does it specify the arrangement of the cell module 3 within the housing 1, the location of the heat dissipation channel 9, the air cooling path, the location of the air outlet 8 of the air-cooled energy storage battery pack and auxiliary devices, the internal cell 13 structure, the structure of the first air inlet 7, the arrangement of the cell 13, the shape and arrangement of the housing 1, or the sealing components of the housing 1. This is because the basic structure of the air-cooled energy storage battery pack in this embodiment uses the first air inlet 7 to introduce cold air into the first region 4 where the cell module 3 is located to dissipate heat from the large-capacity cell 13. Then, driven by the first air supply device 10, the cold air flows along the heat dissipation channel 9 to the second region 6 where the motherboard 5 is located to dissipate heat from the power devices of the motherboard 5. Finally, the air is discharged from the housing 1 through the air outlet 8, thus forming a complete air cooling path, which can solve the defect that the heat generated by the power devices of the motherboard 5 affects the thermal performance of the battery.

[0041] The positional relationship between the first region 4 and the second region 6 in this embodiment will be described in detail below.

[0042] like Figure 2 As shown, in some embodiments, the first region 4 is located below the second region 6.

[0043] Specifically, in this embodiment, since hot air has the characteristic of naturally flowing upward, by placing the first region 4 (where the battery cell module 3 is located) at the bottom and the second region 6 (where the motherboard 5 is located) at the top, the hot air generated by the battery cell module 3 during operation can rely on natural convection and spontaneously flow upward along this height difference. For example, when the battery pack is operating normally, after the cell module 3 generates heat, the hot air can move smoothly towards the motherboard 5 area above without much external force. Then, it flows further towards the exhaust port 8 through the heat dissipation channel 9. This not only follows the natural flow law of hot air and reduces the dependence on the power of the first air supply device 10, but also makes the entire heat dissipation process more energy-efficient and natural. It ensures that heat can be transferred in an orderly manner within the housing 1, avoiding the accumulation of heat near the cell module 3. Furthermore, the hot air generated from the cell module 3 will pass through the heat dissipation channel 9 set between adjacent cell modules 3 during its ascent (when multiple cell modules 3 are set side by side). While the hot air flows towards the motherboard 5 area, it can better transfer heat to the heat dissipation channel 9, and then use the heat dissipation channel 9 to conduct heat to the motherboard 5 area, realizing the continuity and rationality of heat transfer from the cell module 3 to the motherboard 5 area. Compared to situations without this reasonable layout, this approach more efficiently utilizes the heat carried by the hot air generated by the cell module 3 to assist in the heat dissipation of the motherboard 5, improving the efficiency of heat dissipation within the entire battery pack. This avoids the situation where the cell 13 becomes too hot due to untimely heat dissipation, and also reduces the problem of the motherboard 5 being affected by heat accumulation, thus reducing its impact on its own performance and the overall thermal performance of the battery. This enhances the heat dissipation stability and reliability of the air-cooled energy storage battery pack under different operating conditions, and better meets the heat dissipation requirements for long-term stable operation of the energy storage battery. Furthermore, by placing the area where the cell module 3 is located at the bottom, hot air can be transferred upwards in a timely manner, which can effectively prevent hot air from staying and accumulating around the cell module 3 for a long time. This allows the cell module 3 to operate in a relatively stable and suitable temperature environment, which has a positive effect on maintaining the performance and extending the life of the cell 13. After all, excessively high temperatures can easily accelerate the aging of the cell 13 and reduce its charging and discharging performance. A reasonable layout of the area helps to control the temperature of the cell module 3, reduce the various risks faced by the cell 13 due to overheating, ensure the stable output of the overall performance of the battery pack, and further solve the problems mentioned in the background technology, such as the low heat dissipation efficiency of the air-cooled battery pack and the tendency for the cell 13 temperature to be too high.

[0044] The arrangement of the battery cell module 3 within the housing 1 and the location of the heat dissipation channel 9 in this embodiment are described in detail below.

[0045] like Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the battery cell module 3 has at least two sets arranged side by side in the housing 1, and the heat dissipation channel 9 is arranged between the two adjacent sets of battery cell modules 3.

[0046] The design of multiple battery cell modules 3 significantly increases the heat dissipation area. Each battery cell module 3 generates heat during charging and discharging, and the parallel arrangement of multiple modules provides more sources of heat dissipation. The heat dissipation channels 9 are positioned between adjacent battery cell modules 3, ensuring full contact between the channels and modules and greatly expanding the heat exchange range. For example, during battery pack operation, heat from the battery cell module 3 is rapidly transferred to the adjacent heat dissipation channel 9. The first air supply device 10 drives airflow, efficiently removing heat and accelerating heat dissipation. Compared to a single battery cell module 3 design, this significantly improves heat dissipation efficiency, effectively addressing the increased heat generation of the large-capacity battery cell 13 and preventing overheating due to insufficient heat dissipation. This layout also allows for more uniform and orderly heat transfer within the housing 1. The heat dissipation channels 9 between adjacent battery cell modules 3 become key pathways for heat conduction. Hot air generated from the battery cell module 3 flows along the channels to the second area 6 where the motherboard 5 is located, preventing localized heat accumulation. Heat from different cell modules 3 converges and is conducted through their adjacent heat dissipation channels 9, forming a balanced heat flow distribution. This is crucial for maintaining a stable internal temperature field in the battery pack, ensuring that the cell modules 3 and the mainboard 5 operate in a suitable temperature environment, preventing localized overheating from affecting battery performance, enhancing thermal stability, and ensuring long-term stable and reliable battery operation. This aligns with the initial goal of addressing the poor heat dissipation of air-cooled battery packs and its impact on battery thermal performance. Simultaneously, the heat dissipation channels 9 are cleverly integrated into the space between the cell modules 3, avoiding excessive occupation of other space within the housing 1, resulting in a compact and rational spatial layout. Within the limited space of the housing 1, sufficient installation space for the cell modules 3 is ensured while the heat dissipation channels 9 are cleverly embedded, achieving a perfect combination of structural compactness and heat dissipation functionality. Compared to designs that arbitrarily place or fail to utilize the space between modules, this approach maximizes space value without affecting the layout and normal operation of other functional components, improving the space utilization rate of the air-cooled energy storage battery pack, optimizing the overall structure, and enhancing product practicality and market competitiveness.

[0047] The further refinement and limitation of the air-cooling path in this embodiment will be described in detail below.

[0048] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, a second air inlet 11 is provided on the outer wall of the housing 1 corresponding to the second region 6. The second air inlet 11 and the first air inlet 7 are both located on the back of the housing 1, with the second air inlet 11 facing the back of the motherboard 5.

[0049] Specifically, a new avenue for heat dissipation of the motherboard 5 is created by setting a second air inlet 11 on the outer wall of the housing 1, corresponding to the second area 6, facing the back of the motherboard 5. During battery pack operation, cool outside air can directly enter through this air inlet and contact the back of the motherboard 5. When the motherboard 5 generates heat due to the operation of power devices, the cool air quickly exchanges heat with it and carries away the heat, effectively reducing the rate of temperature rise of the motherboard 5. Compared with the traditional method of heat dissipation relying solely on the conduction of hot air in the cell module 3 area, this independent air-cooling channel significantly improves the heat dissipation efficiency of the motherboard 5, reduces the risk of performance degradation of electronic components due to overheating, ensures stable operation of the motherboard 5, maintains the overall reliable and stable electrical performance of the battery pack, extends the service life of the motherboard 5, and reduces the probability of battery pack failure caused by motherboard 5 malfunction. Simultaneously, the cool air entering from the second air inlet 11 interacts with the hot air flowing from the cell module 3 area to the motherboard 5 area within the housing 1 via the heat dissipation channel 9, changing the original airflow direction and heat distribution pattern. After absorbing heat on the back of the motherboard 5, the cool air mixes with the hot air and participates in the overall heat transfer, promoting a more uniform heat diffusion within the housing 1. In different working scenarios, whether it is the frequent charging and discharging of the cell module 3 generating heat, or the data processing or power output fluctuations of the motherboard 5 causing heat changes, the second air inlet 11 can dynamically adjust the airflow circulation and heat distribution within the housing 1, effectively avoiding the problem of excessive local heat accumulation, making the temperature environment of each component within the housing 1 more stable and balanced. This helps to improve the working reliability of other sensitive components in the battery pack, such as sensors and connectors, and reduces problems such as loose connections or abnormal signals caused by temperature stress. It further enhances the adaptability and durability of the air-cooled energy storage battery pack under complex working conditions, effectively solving the thermal management problems faced by traditional air-cooled battery packs due to heat dissipation design limitations, and ensuring the high efficiency and safety of the battery pack during long-term operation.

[0050] The location of the air outlet 8 and the auxiliary devices of the air-cooled energy storage battery pack in this embodiment will be described in detail below.

[0051] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the air outlet 8 is located on the side of the housing 1, and a second air supply device 12 is provided at the air outlet 8.

[0052] Specifically, by placing the air outlet 8 on the side of the housing 1, a more rational and efficient heat dissipation path is constructed. During battery pack operation, the hot air generated inside the housing 1 converges towards the side air outlet 8 under the influence of the first air supply device 10 and the natural rise of hot air. Compared to some unreasonable air outlet 8 placements, this side layout better follows the flow trend of hot air inside the housing 1, reduces the residence time and turbulent flow of hot air inside the housing 1, and allows heat to be discharged from the housing 1 more smoothly. This avoids local overheating caused by poor heat dissipation and effectively ensures that all components inside the housing 1, especially the cell module 3 and the motherboard 5, can operate in a relatively stable and suitable temperature environment, thereby improving the overall thermal stability and reliability of the battery pack and solving the problem of excessively high cell 13 temperature faced by traditional air-cooled battery packs due to poor heat dissipation path design. At the same time, the second air supply device 12 located at the air outlet 8 plays a key role, and the additional power generated by its operation significantly enhances the exhaust speed of hot air at the air outlet 8. When faced with increased heat generation from the large-capacity battery cell 13 and the heat generated by the power devices on the motherboard 5, the second air supply device 12 works in conjunction with the first air supply device 10. The first air supply device 10 is mainly responsible for promoting airflow within the heat dissipation channel 9, facilitating heat exchange between the battery cell module 3 and the heat dissipation channel 9, and guiding hot air to flow towards the motherboard 5 area. Meanwhile, the second air supply device 12 powerfully exhausts hot air at the air outlet 8, forming a more powerful heat dissipation airflow circulation system. This greatly improves the heat dissipation efficiency of the entire battery pack, effectively and promptly dissipating the heat inside the housing 1, preventing heat accumulation that could cause the battery cell 13 to overheat, maintaining the battery pack's good working performance, overcoming the shortcomings of traditional air-cooled battery packs in terms of insufficient heat dissipation power, and ensuring the stable operation of the battery pack under high load or harsh environments.

[0053] The internal structure of the battery cell 13 in the battery cell module 3 of this embodiment will be described in detail below.

[0054] like Figure 2 and Figure 4 As shown, in some embodiments, the battery module 3 has a plurality of battery cells 13 arranged in parallel with each other on a large surface, and the spacing between adjacent battery cells 13 is suitable for ventilation.

[0055] Specifically, by arranging multiple cells 13 in the cell module 3 with their large surfaces parallel to each other and with the spacing between adjacent cells 13 suitable for ventilation, an independent ventilation and heat dissipation channel 9 is created for each cell 13. During battery pack operation, when the cells 13 generate heat, the heat can be quickly dissipated through these channels. Compared to a tightly packed cell layout without ventilation gaps, this design greatly increases the contact area between the cells 13 and the air, resulting in more efficient heat exchange. For example, during high-power charging and discharging, the cells 13 generate more heat, and the air can flow rapidly between adjacent cells 13, carrying away the heat and effectively reducing the temperature of each cell 13. This prevents overheating caused by heat accumulation in a single cell 13, ensuring the stable performance of the cells 13, reducing problems such as capacity decay and increased internal resistance caused by overheating, extending the lifespan of the cells 13, and improving the reliability and safety of the entire cell module 3 and even the battery pack. At the same time, this cell 13 layout, combined with the design of the first air inlet 7 of the housing 1, further enhances the heat dissipation effect. Because the first air inlet 7 includes multiple spaced strip-shaped openings 14, and the spacing between them corresponds one-to-one with that between adjacent cells 13, outside cold air can accurately enter the gaps between adjacent cells 13. When the first air supply device 10 drives the air to flow inside the housing 1, the cold air fully absorbs the heat from the cells 13 as it flows between them, forming an efficient heat exchange. Then, the hot air flows along the heat dissipation channel 9 to the motherboard 5 area and is finally discharged from the air outlet 8. This process makes the heat transfer within the entire housing 1 more orderly and efficient, forming a good heat dissipation path from the cell module 3 to the motherboard 5 area, improving the heat dissipation efficiency of the entire air-cooled energy storage battery pack, effectively solving the heat dissipation problem caused by the increased heat generation of the large-capacity cells 13, avoiding the risk of excessively high cell 13 temperatures due to untimely heat dissipation, and maintaining the stable performance of the battery pack under different operating conditions.

[0056] The structure of the first air inlet 7 in this embodiment will be described in detail below.

[0057] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the first air inlet 7 includes a plurality of spaced-apart strip openings 14, and the spacing between these strip openings 14 and adjacent battery cells 13 is arranged in a one-to-one correspondence.

[0058] Specifically, by designing the first air inlet 7 as multiple strip-shaped openings 14 that correspond one-to-one with adjacent battery cells 13, external cold air can be precisely guided to specific positions between adjacent battery cells 13 in the battery cell module 3. When the battery pack is operating, air can enter the heat dissipation intervals of each battery cell 13 in an orderly manner following the designed path, avoiding disordered flow and waste of cold air. Through precise airflow guidance, the contact efficiency between the cold air and the battery cells 13 is improved, ensuring that each battery cell 13 receives sufficient cooling. This effectively prevents overheating due to insufficient heat dissipation, ensuring the overall heat dissipation uniformity and stability of the battery cell module 3, maintaining the consistency of battery cell 13 performance, and enhancing the reliability and safety of the entire battery cell module 3. Simultaneously, this corresponding arrangement greatly optimizes the heat exchange process. Because cold air can directly and precisely enter the intervals between battery cells 13 and fully contact the surface of the battery cells 13, the heat exchange area is significantly increased. After the battery cell 13 generates heat, the heat can be quickly transferred to the incoming cold air, causing it to heat up rapidly and carry away the heat. Compared to ordinary air inlet designs, this structure can complete heat transfer in a shorter time. By enhancing the heat exchange mechanism, it improves the heat dissipation speed, effectively reduces the temperature of cell 13, and reduces damage such as capacity decay and increased internal resistance caused by high temperature in cell 13. This extends the service life of cell 13 and further improves the overall heat dissipation performance of the air-cooled energy storage battery pack. It successfully solves the problem of low heat dissipation efficiency caused by the large amount of heat generated by large-capacity cell 13 and the limited cooling area of ​​air cooling, ensuring that the battery pack can maintain good thermal performance under different operating conditions.

[0059] In other embodiments, the first air inlet 7 can be in the form of a circular array of holes or a square grille. A circular array of holes can make the airflow more evenly distributed, which is suitable for situations where the heat dissipation requirements of the central area of ​​the battery module 3 are high; a square grille is easier to process and manufacture, and is more aesthetically pleasing and coordinated in some scenarios where appearance design is important. Whether the first air inlet 7 is set as a circular array of holes, a square grille, or multiple strip openings 14, it is all within the protection scope of this embodiment.

[0060] The arrangement of the battery cells 13 in this embodiment will be described in detail below.

[0061] like Figure 2 and Figure 4 As shown, in some embodiments, multiple battery cells 13 in the battery cell module 3 are arranged sequentially along the height direction of the housing 1.

[0062] Specifically, by arranging the battery cells 13 sequentially along the height of the housing 1, the space in the height dimension of the housing 1 is fully utilized. Within the limited volume of the housing 1, this arrangement avoids excessive dispersion of the battery cells 13 in other directions, making the battery cell module 3 structure more compact. For example, compared to disordered arrangement or a planar arrangement, this vertical arrangement can accommodate more battery cells 13 without increasing the horizontal and vertical dimensions of the housing 1. By rationally planning the layout of the battery cells 13, space utilization is improved, which helps to reduce the overall volume of the battery pack, making the product more compact and lightweight, and convenient for use in various space-constrained devices or scenarios, thus improving the product's applicability and portability. At the same time, arranging the battery cells 13 sequentially along the height direction facilitates the formation of a continuous and efficient heat conduction path. When the battery cells 13 generate heat during operation, the heat can be conducted smoothly upwards or downwards along the contact interfaces between the battery cells 13 and the air gaps between adjacent battery cells 13. Because the arrangement direction of the battery cells 13 is somewhat coordinated with the natural upward trend of hot air, the hot air can flow orderly along the arrangement direction of the battery cells 13. Combined with the heat dissipation structure of the housing 1, such as the cold air entering through the first air inlet 7, the heat dissipation channel 9, and the air outlet 8, the heat transfer within the housing 1 becomes more orderly and efficient. By promoting the synergistic effect of heat conduction and heat convection, the heat dissipation efficiency of the entire battery cell module 3 is improved, effectively avoiding uneven temperature distribution of the battery cells 13 caused by excessive local heat accumulation. This ensures the stability and consistency of the battery cell 13's performance, reduces problems such as inconsistent aging rates of the battery cells 13 due to temperature differences, thereby extending the overall service life of the battery cell module 3. It also enhances the reliability and stability of the air-cooled energy storage battery pack under different operating conditions, solving the problem of poor heat dissipation affecting battery thermal performance.

[0063] The shape and arrangement of the box 1 in this embodiment will be described in detail below.

[0064] like Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments, the box 1 is rectangular, and the largest surface of the box 1 is vertically arranged, while the smallest surface is horizontally arranged.

[0065] Specifically, by designing the housing 1 as a rectangle with its largest face vertical and its smallest face horizontal, a more rational layout space is provided for the components within the housing 1. In this layout, the battery cell module 3 and the motherboard 5 can be arranged in layers according to their respective functional requirements and heat dissipation needs. For example, the battery cell module 3 can be placed in the lower area (corresponding to the first area 4), utilizing the space below and facilitating the upward expulsion of hot air; the motherboard 5 is placed in the upper area (corresponding to the second area 6), forming a layered structure with the battery cell module 3, avoiding horizontal interference between the two. Through rational planning of the internal space layout, the connecting lines between the components can be laid out more neatly, reducing the risk of wire tangling and interference, improving the convenience and efficiency of assembly, and also facilitating later maintenance and repair work, reducing maintenance costs and difficulty. Furthermore, the vertical arrangement of the largest face of the rectangular housing 1 facilitates the natural expulsion of hot air. During battery pack operation, the hot air generated by cell module 3 naturally rises due to its lower density. The vertical, largest surface provides a smooth upward channel for this hot air, allowing it to rise rapidly along this surface and flow towards the side air outlet 8 (in conjunction with the side-mounted design of the air outlet 8). This layout, combined with the heat dissipation structure of the housing 1, promotes rapid heat dissipation and reduces heat accumulation within the housing 1. By optimizing the hot air flow path, the heat dissipation effect of the entire air-cooled energy storage battery pack is enhanced, effectively reducing the risk of overheating of cell 13 and motherboard 5 due to poor heat dissipation. This ensures the thermal stability of the battery pack during operation, improves the reliability of the product under different operating conditions, and thus solves the problem of excessively high cell 13 temperature and affected thermal performance caused by unreasonable heat dissipation design in existing air-cooled battery packs.

[0066] The sealing components of the box 1 in this embodiment will be described in detail below.

[0067] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 1 includes a top cover 15, and the top cover 15 is detachably covered on the largest surface of the housing 1.

[0068] Specifically, by providing a detachable top cover 15, the assembly of the air-cooled energy storage battery pack greatly facilitates the installation of internal cell modules 3, mainboard 5, and other auxiliary components. Technicians can easily place and secure each component within the enclosure 1, eliminating the need for difficult operations in a confined space. This simplifies the assembly process, improving efficiency and quality while reducing labor costs and assembly difficulty. During the battery pack's lifespan, when internal maintenance, repair, or replacement of faulty components is required, the detachable top cover 15 can be quickly opened, allowing maintenance personnel direct and convenient access to key components such as cell modules 3, heat dissipation channels 9, and mainboard 5 within the enclosure 1. This facilitates operations such as checking the cell status 13, tightening wiring connections, and cleaning or replacing heat dissipation devices. This simplifies subsequent maintenance, reduces maintenance time and workload, effectively improves product maintainability and lifespan, lowers overall maintenance costs, and ensures long-term stable operation of the battery pack. Furthermore, the detachable top cover 15 provides favorable conditions for optimized heat dissipation. During battery pack operation, if monitoring, evaluation, or adjustment of heat dissipation performance is required, the top cover 15 can be easily removed to directly observe the flow of hot air inside the housing 1, the temperature distribution of each component, and the working status of the heat dissipation structure. For example, the operating effect of the first air supply device 10 and the second air supply device 12 can be visually checked, and whether there are any blockages or obstructions in the heat dissipation channel 9 can be observed. By facilitating heat dissipation monitoring, potential problems in the heat dissipation system can be identified in a timely manner and addressed accordingly. Furthermore, when conducting heat dissipation performance improvement tests or optimizing designs, the removable top cover 15 makes it easier to modify or adjust the heat dissipation structure inside the housing 1, such as adding or adjusting heat dissipation fins, optimizing the position or angle of the air supply device, etc. Through convenient heat dissipation modifications, it is helpful to further improve the heat dissipation efficiency of the air-cooled energy storage battery pack, better solve the problem of poor heat dissipation affecting battery thermal performance, and ensure that the battery pack maintains good thermal stability and reliability under various operating conditions.

[0069] like Figures 2 to 7 As shown, the working process of an air-cooled energy storage battery pack in this embodiment is as follows:

[0070] 1. Heat dissipation of battery cell module 3:

[0071] When the battery module 3 is working, the battery cells 13 generate heat. Because the large surfaces of the battery cells 13 are arranged parallel to each other and the intervals are suitable for ventilation, the heat begins to dissipate into the air in the surrounding intervals. On the outer wall of the first area 4 near the battery module 3 in the housing 1, the first air inlet 7 (with multiple strip-shaped openings 14 corresponding one-to-one with the intervals of adjacent battery cells 13) allows cold air from the outside to precisely enter the intervals of the battery cells 13. The first air supply device 10 in the heat dissipation channel 9 drives the cold air to flow in the intervals of adjacent battery cells 13. The cold air fully absorbs the heat from the battery cells 13 and is converted into hot air. The battery cells 13 are arranged sequentially along the height direction of the housing 1, which facilitates heat conduction along the contact interface of the battery cells 13 and the air gaps. The hot air flows in an orderly manner along the arrangement direction of the battery cells 13, working together with the incoming cold air to improve heat dissipation efficiency.

[0072] 2. Motherboard 5 heatsink:

[0073] When the battery pack is running, cool outside air enters directly from the second air inlet 11 on the back of the casing 1 and contacts the back of the motherboard 5. The motherboard 5 generates heat due to the operation of its power devices; the incoming cool air exchanges heat with it, absorbing the heat and carrying it away, thus reducing the rate of temperature rise of the motherboard 5. Hot air flowing from the cell module 3 area to the motherboard 5 area through the heat dissipation channel 9 also exchanges heat with the motherboard 5, assisting in heat dissipation.

[0074] 3. Overall heat dissipation:

[0075] Hot air flows from the cell module 3 area to the motherboard 5 area through the heat dissipation channel 9. The hot air is finally discharged through the air outlet 8 on the outer wall of the second area 6 of the housing 1 near the motherboard 5. The second air supply device 12 at the air outlet 8 operates, generating additional power to enhance the exhaust speed of the hot air, and works in conjunction with the first air supply device 10 to form a powerful heat dissipation airflow circulation system.

[0076] The rectangular housing 1 has its largest surface vertically positioned, allowing the hot air generated by the battery cell module 3 to rise naturally. Utilizing the vertical surface as an upward channel, the hot air rises rapidly and flows towards the side air outlet 8, reducing heat accumulation inside the housing 1 and ensuring the thermal stability of the battery pack.

[0077] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A wind-cooled energy storage battery pack, characterized in that, include: Box (1), with cavity (2); The battery cell module (3) is installed in the first region (4) inside the cavity (2); The motherboard (5) is installed in the second region (6) within the cavity (2); A first air inlet (7) is provided on the outer wall of the housing (1) corresponding to the first region (4), and an air outlet (8) is provided on the outer wall of the housing (1) near the second region (6). The housing (1) has a heat dissipation channel (9) leading from the first region (4) to the second region (6), and a first air supply device (10) is provided in the heat dissipation channel (9).

2. The air-cooled energy storage battery pack according to claim 1, characterized in that, The first region (4) is located below the second region (6).

3. The air-cooled energy storage battery pack according to claim 2, characterized in that, The battery cell module (3) has at least two sets arranged side by side in the housing (1), and the heat dissipation channel (9) is arranged between two adjacent sets of the battery cell module (3).

4. The air-cooled energy storage battery pack according to claim 1, characterized in that, The outer wall of the housing (1) corresponding to the second region (6) is provided with a second air inlet (11). The second air inlet (11) and the first air inlet (7) are both located on the back of the housing (1). The second air inlet (11) faces the back of the motherboard (5).

5. The air-cooled energy storage battery pack according to claim 1, characterized in that, The air outlet (8) is located on the side of the housing (1), and a second air supply device (12) is provided at the air outlet (8).

6. The air-cooled energy storage battery pack according to claim 1, characterized in that, The battery cell module (3) has multiple battery cells (13) arranged in parallel with each other on a large surface, and the spacing between adjacent battery cells (13) is suitable for ventilation.

7. The air-cooled energy storage battery pack according to claim 6, characterized in that, The first air inlet (7) includes a plurality of strip-shaped openings (14) spaced apart, and the spacing between the strip-shaped openings (14) and the adjacent battery cells (13) is arranged in a one-to-one correspondence.

8. The air-cooled energy storage battery pack according to claim 6, characterized in that, The multiple battery cells (13) in the battery cell module (3) are arranged sequentially along the height direction of the housing (1).

9. The air-cooled energy storage battery pack according to any one of claims 1-7, characterized in that, The box (1) is rectangular, with the largest surface of the box (1) set vertically and the smallest surface of the box (1) set horizontally.

10. The air-cooled energy storage battery pack according to claim 9, characterized in that, The housing (1) includes a top cover (15) that is detachably covered on the largest surface of the housing (1).

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