Battery system

Abstract

The utility model discloses a battery system which comprises a plurality of modules, a shell, a first fan and a second fan, the shell comprises a first side plate, a second side plate, a first end plate and a second end plate, the first side plate and the second side plate are oppositely arranged, the first end plate and the second end plate are oppositely arranged, and the first side plate, the first end plate, the second side plate and the second end plate are sequentially connected to define a containing cavity. The first end plate and the second end plate are provided with an air inlet and an air outlet which are communicated with the containing cavity respectively, an air channel is formed between the air inlet and the air outlet, the multiple modules are arranged on the two sides of the air channel, a first air opening is formed in the position, close to the first end plate, of the first side plate, and a second air opening is formed in the position, close to the second end plate, of the second side plate. The first fan is connected with the shell and covers the first air opening; the second fan is connected with the shell and covers and seals the second air opening, the power of the first fan is smaller than that of the second fan, and the technical problem that an existing air-cooled battery system is uneven in heat dissipation effect is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery heat dissipation technology, and in particular to a battery system. Background Technology

[0002] In existing air-cooled battery systems, as battery usage time increases, battery temperature control gradually becomes a key factor affecting battery performance and lifespan. To improve battery thermal management efficiency, air-cooled systems typically dissipate heat by carrying away battery heat through airflow.

[0003] However, airflow in air-cooled battery systems typically dissipates heat through a single airflow direction. Due to variations in airflow speed, direction, and temperature, the cooling effect on different areas of the battery module varies significantly. This uneven temperature distribution is particularly pronounced in different parts of the battery system, such as the front and rear ends and sides of the battery module, easily leading to localized overheating and affecting the battery's operational stability.

[0004] Therefore, the existing air-cooled battery systems generally suffer from uneven heat dissipation and localized heat accumulation, which urgently needs to be addressed. Utility Model Content

[0005] One objective of this invention is to provide a battery system that addresses the technical problem of uneven heat dissipation in existing air-cooled battery systems.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a battery system comprising multiple modules; a housing comprising a first side plate and a second side plate disposed opposite to each other, and a first end plate and a second end plate disposed opposite to each other, the first side plate, the first end plate, the second side plate and the second end plate being sequentially connected to form a receiving cavity to accommodate the modules, the first end plate and the second end plate being respectively provided with an air inlet and an air outlet communicating with the receiving cavity, an air duct being formed between the air inlet and the air outlet, the multiple modules being disposed on both sides of the air duct, a first air vent being provided on the first side plate near the first end plate, and a second air vent being provided on the second side plate near the second end plate; a first fan being connected to the housing and covering the first air vent; a second fan being connected to the housing and covering the second air vent; wherein, the power of the first fan is less than the power of the second fan.

[0007] Optionally, the distance from the first air outlet to the first end plate is L1, and the length of the first side plate is L2, 1 / 4≤L1 / L2≤1 / 2; the distance from the second air outlet to the second end plate is L3, and the length of the second side plate is L4, 1 / 4≤L3 / L4≤1 / 2.

[0008] Optionally, the power ratio of the first fan to the second fan is A, where 0.3 ≤ A ≤ 0.7.

[0009] Optionally, the battery system also includes a main fan, with the main fan connected to the housing and a cover sealing the air inlet and / or outlet.

[0010] Optionally, the power ratio of the main fan to the first fan is B, where 2 ≤ B ≤ 3.

[0011] Optionally, a first channel and a second channel are provided between the modules. The first channel connects the first air outlet and the air duct, and the second channel connects the second air outlet and the air duct.

[0012] Optionally, the battery system further includes a first air guide plate and a second air guide plate. The first air guide plate is disposed in the first section near the air duct, and the first air guide plate is inclined relative to the air outlet direction and the first air outlet direction, respectively. The second air guide plate is disposed in the second section near the air duct, and the second air guide plate is inclined relative to the air outlet direction and the second air outlet direction, respectively.

[0013] Optionally, the first channel and the airflow direction in the duct are at an angle A1, where 30°≤A1≤60°; the second channel and the airflow direction in the duct are at an angle A2, where 30°≤A2≤60°.

[0014] Optionally, the air inlet and / or air outlet includes multiple through holes, which are disposed on the end plate and distributed in an array.

[0015] Optionally, the module includes multiple battery cells arranged along its thickness direction, with the thickness direction of the battery cells perpendicular to the direction of the air duct extension.

[0016] Optionally, the module also includes a connecting plate, which is disposed between adjacent cells and has a connecting hole that extends through the connecting plate along the air duct extension direction.

[0017] The beneficial effects of this utility model are as follows:

[0018] Unlike existing technologies, this application utilizes multiple air vents at different locations on the side of the casing, each equipped with a fan of varying power, to supplement and optimize airflow within the cooling duct. By adjusting the airflow characteristics within the battery system's cooling duct and supplementing the required airflow at different locations, it ensures more even distribution of cooling airflow across every part of the battery system. Furthermore, it balances the heat dissipation effect of the airflow covering different areas, effectively solving the problem of uneven heat dissipation in traditional air-cooled systems and improving the overall safety and stability of the battery system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is an overall schematic diagram of the battery system provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the battery system provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the shell structure provided in an embodiment of the present utility model;

[0023] Figure 4 This is an internal top view of the battery system provided in an embodiment of the present invention;

[0024] Figure 5 This is an internal top view of another battery system provided in this embodiment of the present invention;

[0025] Figure 6 This is an internal top view of a battery system provided in another embodiment of the present invention;

[0026] Figure 7 This is provided by the embodiment of the present utility model. Figure 4 A cross-sectional view along the AA direction.

[0027] Explanation of icon numbers:

[0028] 10. Module; 11. Battery cell; 12. Connecting plate; 121. Connecting hole; 20. Housing; 21. First side plate; 211. First air vent; 22. Second side plate; 221. Second air vent; 23. First end plate; 231. Air inlet; 24. Second end plate; 241. Air outlet; 25. Receiving cavity; 26. Air duct; 27. First channel; 28. Second channel; 29. ​​Through hole; 31. First fan; 32. Second fan; 33. Main fan; 41. First air guide plate; 42. Second air guide plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1 to 3 , Figure 1 This is an overall schematic diagram of the battery system provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the battery system provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the shell 20 structure provided in this embodiment of the utility model.

[0031] This utility model provides a battery system including multiple modules 10, a housing 20, a first fan 31, and a second fan 32, which aims to optimize the cooling effect and alleviate the problem of uneven heat dissipation in air-cooled battery systems.

[0032] The housing includes a first side plate and a second side plate arranged opposite each other, as well as a first end plate and a second end plate. The first side plate, the first end plate, the second side plate, and the second end plate are sequentially arranged to form a receiving cavity for accommodating multiple battery modules. Specifically, the first side plate and the second side plate are arranged along the length of the battery system, so that the entire system has sufficient space to accommodate multiple battery modules. The first side plate and the second side plate can be made of high-strength composite materials, which can provide sufficient structural support while taking into account thermal conductivity to help heat diffusion and dissipation.

[0033] The first end plate and the second end plate are arranged along the width direction of the battery system, and the first end plate and the second end plate are respectively provided with air inlet and air outlet. The air inlet and air outlet are connected to the receiving cavity. This directional layout allows the air inlet and air outlet to be reasonably arranged at both ends of the system, thereby forming an effective air duct. Multiple battery modules are arranged on both sides of the air duct. The cooling airflow can flow smoothly through these modules to exchange heat with the battery system, effectively removing the heat generated during battery operation and reducing the temperature of the battery system.

[0034] To improve cooling efficiency and balance heat dissipation in different areas, the side panels of the housing 20 (i.e., the first side panel 21 and the second side panel 22) have a first air vent 211 and a second air vent 221 at different locations. The first air vent 211 is located on the first side panel 21 near the first end plate 23, and the second air vent 221 is located on the second side panel 22 near the second end plate 24. Furthermore, the first fan 31 is connected to the housing 20 and covers the first air vent 211, and the second fan 32 is connected to the housing 20 and covers the second air vent 221. Also, the power of the first fan 31 is less than the power of the second fan 32.

[0035] In this embodiment, by opening vents on different side plates and using fans to introduce cold air, the battery system can supplement cooling airflow at different locations, preventing the airflow from gradually weakening due to heat exchange as it passes through the air duct 26. This solves the problems of insufficient airflow intensity and uneven heat dissipation in traditional air-cooled systems. Specifically, the first vent 211 is close to the first end plate 23, and the second vent 221 is close to the second end plate 24, to supplement cooling airflow at different locations, enhance the cooling effect in local areas, help prevent local heat accumulation in different areas, and further balance the heat dissipation effect in different areas.

[0036] Furthermore, since the second air vent 221 is closer to the air outlet 241, the airflow undergoes sufficient heat exchange during its journey, resulting in a gradual increase in temperature. This necessitates stronger airflow to improve the airflow's heat dissipation efficiency and balance the cooling effect across different areas. Conversely, the first air vent 211 is closer to the air inlet 231, where the airflow has not yet undergone sufficient heat exchange, resulting in minimal temperature change and a relatively smaller required airflow. Therefore, in this embodiment, the power of the first fan 31 is set lower than that of the second fan 32. The second fan 32 can provide more cooling airflow, and this power difference further balances the heat dissipation needs of different areas of the entire battery system, optimizing the air-cooling effect.

[0037] Furthermore, in order to better optimize the distribution of cooling airflow and improve heat dissipation efficiency, the position of the air vents on the side plate is restricted to ensure a balanced airflow path and cooling effect within the air duct 26.

[0038] Please see Figure 4 , Figure 4 This is an internal top view of the battery system provided in an embodiment of the present invention.

[0039] Specifically, the distance from the first air vent 211 to the first end plate 23 is L1, the length of the first side plate 21 is L2, and the ratio of L1 to L2 satisfies 1 / 4 ≤ L1 / L2 ≤ 1 / 2. This is because, before the first air vent 211 replenishes the cooling flow to the air duct 26, the airflow in the air duct 26 needs sufficient distance to fully contact the module 10 in the battery system for effective heat exchange. Therefore, the distance L1 from the first air vent 211 to the first end plate 23 should not be too short; simultaneously, the distance L1 from the first air vent 211 to the first end plate 23 should not be too long to avoid excessively high airflow temperature in the air duct 26, which would lead to an excessive decrease in heat dissipation and affect the overall cooling effect within the battery system.

[0040] Similarly, the distance from the second air vent 221 to the second end plate 24 is L3, and the length of the second side plate 22 is L4, with the ratio of L3 to L4 satisfying 1 / 4 ≤ L3 / L4 ≤ 1 / 2. The principle is similar to that of the first air vent 211; while ensuring sufficient distance for airflow within the air duct 26 to exchange heat with the module 10 within the battery system, it is also necessary to avoid excessive heat exchange and excessive attenuation of the heat dissipation effect.

[0041] In this embodiment, the position of the air vent is limited by precisely controlling the ratio of the distance between the air vent and the end plate (L1, L3) to the length of the side plate (L2, L4). This allows for a reasonable distribution of cooling airflow within the air duct 26, ensuring sufficient path for heat exchange while preventing excessive heat loss due to excessively long paths. This optimized structure enables a more uniform distribution of cooling airflow in the air-cooled battery system, avoiding localized overheating and improving the overall heat dissipation efficiency and battery stability. In some embodiments, L1 / L2 = 1 / 3 and L3 / L4 = 1 / 3 are used to achieve even better heat dissipation.

[0042] Furthermore, considering the heat dissipation requirements at different vent locations and the balance of airflow distribution, in order to optimize the heat dissipation effect of the battery system, the power ratio of the first fan 31 to the second fan 32 in this embodiment is A, where the value of A satisfies 0.3≤A≤0.7.

[0043] Specifically, because the airflow requirements are not entirely the same at different locations in the battery system, especially in the area near the air outlet 241, where stronger airflow is needed to ensure adequate cooling, while the area near the air inlet 231 has relatively lower airflow requirements, the first fan 31 (located at the first air outlet 211) is designed with relatively lower power, while the second fan 32 (located at the second air outlet 221) has relatively higher power to cope with the greater cooling demand in the rear area.

[0044] The range of the A value is set to 0.3 ≤ A ≤ 0.7, which aims to ensure that the power ratio of the first fan 31 and the second fan 32 can effectively adapt to the airflow requirements of different areas. Within this range, a smaller A value (e.g., close to 0.3) means that the power difference between the first fan 31 and the second fan 32 is relatively large, which is suitable for situations where the distance difference between the first fan 31 and the second fan 32 in the extension direction of the air duct 26 is relatively large; while a larger A value (close to 0.7) means that the power difference between the first fan 31 and the second fan 32 is relatively large, which is suitable for situations where the distance difference between the first fan 31 and the second fan 32 in the extension direction of the air duct 26 is relatively small.

[0045] In this embodiment, by adjusting the fan power ratio, it is possible to adapt to various distance scenarios between the first fan 31 and the second fan 32 in the extension direction of the air duct 26, ensuring that sufficient cooling airflow can be provided at each air outlet to balance the heat dissipation effect of the air duct 26, so as to avoid uneven local heat dissipation and ensure that the control of each battery module 10 is within the optimal range.

[0046] In some embodiments, a main fan 33 is introduced to further improve the heat dissipation efficiency of the battery system. The main fan 33 is connected to the housing 20 and covers the air inlet 231 and / or air outlet 241. The main fan 33 is mainly used to enhance the airflow capability of the entire air-cooling system and increase the cooling airflow speed in the air duct 26, making it suitable for heavy loads or high-temperature environments.

[0047] In this embodiment, the main fan 33 can accelerate the airflow within the air duct 26, enhance the cooling effect, and ensure that the battery module 10 within the system can receive sufficient heat dissipation, which is especially suitable when the power output is high or the external ambient temperature is high. The connection between the main fan 33 and the air inlet 231 and / or the air outlet 241 depends on the heat dissipation requirements. When the heat dissipation requirements are high, the main fan 33 can be installed at both the air inlet 231 and the air outlet 241 to enhance the airflow within the air duct 26 and improve the speed and efficiency of air passing through the battery module 10 area.

[0048] Furthermore, to optimize airflow, in this embodiment, the power ratio of the main fan 33 to the first fan 31 is set to B, where 2 ≤ B ≤ 3. This aims to ensure that the main fan 33 and the first fan 31 can form effective airflow coordination when working together, thereby optimizing the overall heat dissipation efficiency of the battery system.

[0049] Specifically, the power ratio B between the main fan 33 and the first fan 31 cannot be too large; that is, the power of the main fan 33 cannot far exceed the power of the first fan 31. When the power of the main fan 33 cannot far exceed the power of the first fan 31, the airflow speed of the main fan 33 is too fast, which will "suppress" the airflow of the first fan 31, thus making the supplementary cooling airflow originally designed by the first fan 31 negligible, or even insignificant.

[0050] The power ratio B between the main fan 33 and the first fan 31 should not be too small, meaning the power of the main fan 33 should not be too low and needs to be higher than that of the first fan 31 by a certain degree. When the power of the main fan 33 is too low, it cannot effectively drive the airflow along the extension direction of the air duct 26. On the one hand, this will cause the airflow velocity in some areas of the air duct 26 to be too low, resulting in poor heat dissipation. On the other hand, due to the supplementary airflow effect of the first fan 31, the airflow in the air duct 26 will be turbulent, making the airflow channel obstructed, and even causing uneven heat dissipation in some areas due to excessive airflow concentration.

[0051] In this embodiment, through reasonable power matching, the power ratio of the main fan 33 to the first fan 31 is limited to the range of 2 to 3, ensuring their synergistic effect. The main fan 33 can provide sufficient airflow to ensure that the airflow can fully cover the entire battery system, remove heat, and improve heat dissipation efficiency. The first fan 31 provides additional airflow to supplement and balance the heat dissipation effect of the airflow within the air duct 26. The two work together to ensure that the cooling airflow can evenly and smoothly cover the entire battery system.

[0052] In some embodiments, to further optimize the flow of cooling air and heat dissipation efficiency, a first channel 27 and a second channel 28 are provided between the modules 10 in the battery system. The first channel 27 connects the first air vent 211 and the air duct 26, and the second channel 28 connects the second air vent 221 and the air duct 26. By adding a path between the modules 10, it is ensured that the cooling airflow can enter the air duct 26 more smoothly from the air vent, thereby effectively improving the overall heat dissipation performance of the air-cooled system.

[0053] In this embodiment, the first channel 27 and the second channel 28 introduce external cooling airflow into the air duct 26 through the first air outlet 211 and the second air outlet 221, respectively, providing a direct and effective airflow channel. The airflow flows smoothly along the predetermined flow path, reducing airflow resistance. This ensures that the airflow can directly converge into the air duct 26, avoiding stagnation, blockage, or unevenness during the flow process. This helps improve cooling efficiency, prevents weak airflow in local areas, and thus avoids uneven heat dissipation.

[0054] Further, please refer to Figure 5 , Figure 5This is an internal top view of another battery system provided in this embodiment of the present invention. To reduce airflow resistance and avoid airflow turbulence, in this embodiment, the battery system further includes a first air guide plate 41 and a second air guide plate 42. Specifically, the first air guide plate 41 is disposed on the first channel 27 near the air duct 26, and the first air guide plate 41 is inclined relative to the direction of the air outlet 241 and the direction of the first air outlet 211; the second air guide plate 42 is disposed on the second channel 28 near the air duct 26, and the second air guide plate 42 is inclined relative to the direction of the air outlet 241 and the direction of the second air outlet 221.

[0055] In this embodiment, the main function of the first air guide plate 41 and the second air guide plate 42 is to guide the flow path of the supplementary airflow, ensure that the airflow enters the air duct 26 smoothly, and avoid turbulence caused by the airflow deviating from the correct flow direction.

[0056] Without air guides, the supplementary airflow may interfere with the existing airflow, leading to poor flow or backflow. By setting up the first air guide 41 and the second air guide 42 and adjusting their respective tilt angles, the airflow can be guided in the correct direction, ensuring that the supplementary airflow can better integrate with the airflow within the duct 26. This reduces unnecessary pressure loss, lowers resistance, improves airflow efficiency, and enhances heat dissipation.

[0057] Further, please refer to Figure 6 , Figure 6 This is an internal top view of a battery system provided in another embodiment of the present invention. To optimize the flow path of the cooling airflow and reduce airflow resistance, in this embodiment, there is an angle A1 between the airflow direction in the first channel 27 and the airflow direction in the air duct 26, where 30°≤A1≤60°; and an angle A2 between the airflow direction in the second channel 28 and the airflow direction in the air duct 26, where 30°≤A2≤60°. By reasonably controlling the angles between the first channel 27, the second channel 28, and the air duct 26, the obstruction effect of the supplementary airflow on the main airflow within the air duct 26 can be effectively reduced, thereby improving the airflow smoothness and heat dissipation efficiency of the entire system.

[0058] In this embodiment, when the supplementary airflow forms an uncoordinated angle with other airflows in the duct 26, unnecessary flow resistance is generated, leading to local eddies or airflow turbulence, thereby reducing the heat dissipation effect.

[0059] By adjusting the angles of A1 and A2, the entry path of the supplementary airflow can be controlled more precisely. A moderate angle (such as 30° to 60°) allows the supplementary airflow to flow more smoothly in the same direction as the main airflow, enabling the supplementary airflow to enter the air duct 26 more naturally. This smoother transition reduces airflow back impact and eddy currents, avoiding excessive interference with the main airflow. Consequently, the airflow can flow more smoothly through the battery module 10 area, improving heat dissipation efficiency.

[0060] In some embodiments, to improve the heat dissipation performance of the battery system, the air inlet 231 and / or air outlet 241 include a plurality of through holes 29, which are disposed on the end plate and distributed in an array. This not only increases the number of channels for airflow in or out, improving the uniformity and efficiency of airflow, but also provides higher heat dissipation capacity in the air-cooled system, ensuring that the battery system can maintain good temperature control under various loads and environmental conditions.

[0061] In this embodiment, the multiple through holes 29 are arranged in an array, which ensures more uniform airflow when entering or exiting the air duct 26. The arrayed design of the through holes 29 avoids airflow concentration in a single channel, thereby effectively preventing excessively fast or slow airflow velocities in certain areas and reducing airflow unevenness. Furthermore, the size, position, and distribution density of the through holes 29 can be adjusted according to heat dissipation requirements to meet the needs of different battery systems and further optimize the heat dissipation effect.

[0062] Please see Figure 7 , Figure 7 This is provided by the embodiment of the present utility model. Figure 4 A cross-sectional view along the AA direction. In some embodiments, the module 10 includes a plurality of battery cells 11 arranged along its thickness direction. The thickness direction of the battery cells 11 is perpendicular to the extension direction of the air duct 26, that is, the gaps between the battery cells 11 are parallel to the airflow direction. This arrangement ensures that the airflow can pass evenly through the gaps between the battery cells 11, enhancing the cooling effect of the air-cooling system and maximizing the utilization of the airflow within the air duct 26 for heat exchange.

[0063] In this embodiment, the battery cells 11 are arranged along the thickness direction, such that the gaps between the battery cells 11 are parallel to the airflow direction. Since the airflow direction is perpendicular to the arrangement direction of the battery cells 11, the airflow can pass smoothly through the gaps between the battery cells 11 without being obstructed or interfered with by the arrangement direction of the battery cells 11. The airflow maintains a relatively stable velocity when passing through the gaps between the battery cells 11 and effectively carries away the heat generated by the battery cells 11, improving heat dissipation efficiency.

[0064] Furthermore, the module 10 also includes a connecting plate 12, which is disposed between adjacent cells 11. The connecting plate 12 has a connecting hole 29121 that extends through the connecting plate 12 along the direction of the air duct 26. Specifically, the connecting hole 29121 on the connecting plate 12 provides a channel for airflow, allowing airflow to pass directly and smoothly through the gaps between the cells 11, thereby reducing airflow resistance and energy loss when flowing between the cells 11. The airflow can more effectively remove the heat generated on the surface of the cells 11, thereby improving the heat dissipation effect of the battery system.

[0065] In this embodiment, the presence of the connecting plate 12 not only helps optimize airflow but also improves the structural stability of the battery module 10. By tightly connecting adjacent cells 11 together, the connecting plate 12 can prevent relative displacement or loosening between the cells 11. The role of the connecting plate 12 is particularly significant in high-vibration or vibration environments, as it can effectively reduce friction and collision between cells 11, avoiding performance degradation or safety issues caused by structural instability.

[0066] Furthermore, the connecting plate 12 supports the modularity of the battery module 10. The connecting plate 12 between each cell 11 can be adjusted and optimized according to the actual needs of the battery. For example, the number, size, and spacing of the connecting holes 29121 can be customized according to heat dissipation requirements, the structure of the air duct 26, and the design of the battery system. This flexibility allows the air-cooled structure to adapt to various types of battery systems, ensuring optimized airflow and heat dissipation.

[0067] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0068] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0069] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0070] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery system, characterized in that, include: Multiple modules; The housing includes a first side plate and a second side plate disposed opposite to each other, and a first end plate and a second end plate disposed opposite to each other. The first side plate, the first end plate, the second side plate and the second end plate are sequentially connected to form a receiving cavity to accommodate the module. The first end plate and the second end plate are respectively provided with an air inlet and an air outlet communicating with the receiving cavity. An air duct is formed between the air inlet and the air outlet. The plurality of modules are disposed on both sides of the air duct. The first side plate is provided with a first air outlet near the first end plate, and the second side plate is provided with a second air outlet near the second end plate. A first fan is connected to the housing and covers the first air vent; A second fan is connected to the housing and covers the second air vent. The power of the first fan is less than that of the second fan.

2. The battery system according to claim 1, characterized in that, The distance from the first air vent to the first end plate is L1, and the length of the first side plate is L2, 1 / 4≤L1 / L2≤1 / 2; the distance from the second air vent to the second end plate is L3, and the length of the second side plate is L4, 1 / 4≤L3 / L4≤1 / 2.

3. The battery system according to claim 1, characterized in that, The power ratio of the first fan to the second fan is A, where 0.3 ≤ A ≤ 0.

7.

4. A battery system according to claim 1, characterized in that, The battery system also includes a main fan, which is connected to the housing and covers the air inlet and / or the air outlet.

5. A battery system according to claim 4, characterized in that, The power ratio of the main fan to the first fan is B, where 2 ≤ B ≤ 3.

6. A battery system according to claim 1, characterized in that, The modules are provided with a first channel and a second channel, the first channel connecting the first air outlet and the air duct, and the second channel connecting the second air outlet and the air duct.

7. A battery system according to claim 6, characterized in that, The battery system further includes a first air guide plate and a second air guide plate. The first air guide plate is disposed in the first channel near the air duct, and the first air guide plate is inclined relative to the air outlet direction and the first air outlet direction, respectively. The second air guide plate is disposed in the second channel near the air duct, and the second air guide plate is inclined relative to the air outlet direction and the second air outlet direction, respectively.

8. A battery system according to claim 6, characterized in that, The first channel forms an angle A1 with the airflow direction in the air duct, where 30°≤A1≤60°; the second channel forms an angle A2 with the airflow direction in the air duct, where 30°≤A2≤60°.

9. A battery system according to any one of claims 1 to 8, characterized in that, The air inlet and / or the air outlet include multiple through holes, which are disposed on the end plate and distributed in an array.

10. A battery system according to any one of claims 1 to 8, characterized in that, The module includes multiple battery cells arranged along its thickness direction, and the thickness direction of the battery cells is perpendicular to the extension direction of the air duct.

11. A battery system according to claim 10, characterized in that, The module also includes a connecting plate, which is disposed between adjacent battery cells, and the connecting plate has a connecting hole that extends through the connecting plate along the air duct extension direction.

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