Battery air-cooling structure and battery pack

Abstract

The utility model belongs to battery technical field discloses a battery air -cooled structure and battery package, wherein battery air -cooled structure includes the circulating air pipe of inside hollow, circulating air pipe sets up between two groups of adjacent battery module, is provided with first air duct and second air duct in circulating air pipe, and the length of first air duct and second air duct all extends along the first direction, and one end of first air duct is provided with the air inlet, and the end away from air inlet of first air duct is communicated with second air duct, and the side of circulating air pipe towards one group of battery module is provided with a plurality of first air outlet hole communicated with first air duct, and the side of circulating air pipe towards another group of battery module is provided with a plurality of second air outlet hole communicated with second air duct, and the air outlet area of a plurality of first air outlet hole gradually increases along the direction away from air inlet, and the air outlet area of a plurality of second air outlet hole gradually increases along the direction away from the place of second air duct and first air duct communication, improves the uniformity of each cell air -cooled effect in battery package, improves the heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery air-cooling structure and battery pack. Background Technology

[0002] During charging and discharging, battery cells generate varying amounts of heat depending on operating conditions. Accumulated heat can negatively impact the overall system performance and lifespan, and even the safety of the entire system. Current technologies typically employ air cooling or liquid cooling to address this issue. Existing battery pack products utilize air cooling by creating an air inlet on one side of the battery pack housing and an air outlet on the other. However, this cooling method has several drawbacks: the cooling gas temperature near the air inlet is lower than that near the air outlet, resulting in different heat dissipation efficiencies between cells near the air inlet and outlet, leading to poor heat dissipation uniformity across the entire battery pack. Furthermore, due to the single-sided air intake, the cooling gas can easily short-circuit or recirculate in structural dead zones, preventing timely exhaust and further impacting the overall heat dissipation performance and lifespan of the battery pack. Utility Model Content

[0003] The purpose of this utility model is to provide a battery air-cooling structure and battery pack that can ensure the uniformity of air-cooling effect of each cell in the battery pack, reduce the temperature difference between cells, and improve the flow of cooling gas in the battery pack to improve heat dissipation.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] On one hand, a battery air-cooling structure is provided, including a hollow circulating air duct disposed between two adjacent battery modules. The circulating air duct has a first air channel and a second air channel, both of which extend along a first direction. One end of the first air channel has an air inlet, and the end of the first air channel away from the air inlet is connected to the second air channel. The circulating air duct has a plurality of first air outlets connected to the first air channel on the side facing one of the battery modules, and a plurality of second air outlets connected to the second air channel on the side facing the other battery module. The air outlet area of ​​the plurality of first air outlets gradually increases along the direction away from the air inlet, and the air outlet area of ​​the plurality of second air outlets gradually increases along the direction away from the connection between the second air channel and the first air channel.

[0006] In one embodiment, the circulating air duct includes an inlet air duct and a return air duct that are interconnected. The inlet air duct and the return air duct are arranged along a second direction, which is at an angle to the first direction. The air inlet is located at one end of the inlet air duct. The first air duct is located inside the inlet air duct, and the second air duct is located inside the return air duct. The first air outlet is located on the side of the inlet air duct away from the return air duct, and the second air outlet is located on the side of the return air duct away from the inlet air duct. The inlet air duct and the return air duct are connected to form the circulating air duct.

[0007] In one embodiment, the air inlet pipe and the air return pipe are spaced apart along the second direction, and the circulating air pipe further includes a connecting pipe located at the end of the air inlet pipe away from the air inlet, and the connecting pipe connects the air inlet pipe and the air return pipe.

[0008] In one embodiment, a heat insulation gap is formed between the air inlet pipe and the air return pipe, and a first heat insulation element is provided in the heat insulation gap.

[0009] In one embodiment, a duct partition is provided inside the circulating air duct, which divides the interior of the circulating air duct into a first air duct and a second air duct. One end of the duct partition along the first direction is adjacent to the air inlet, and the other end is spaced apart from the inner sidewall of the circulating air duct to form a communication port connecting the first air duct and the second air duct.

[0010] In one embodiment, an air outlet is also provided on the circulating air duct, the air outlet is connected to the second air duct, and the air outlet and the air inlet are located on the same side of the circulating air duct along the first direction.

[0011] In one embodiment, the ventilation area of ​​the first air duct gradually increases in the direction away from the air inlet, and the ventilation area of ​​the second air duct gradually increases in the direction away from the connection between the second air duct and the first air duct.

[0012] In one embodiment, the battery air-cooling structure further includes multiple ventilation baffles, each of which is disposed between two adjacent cells in the battery module. A cooling channel is disposed within the ventilation baffle and is connected to the circulating air duct. The cooling channel passes through the ventilation baffle along a second direction. All the cells of the battery module are arranged along the first direction, which is perpendicular to the second direction.

[0013] In one embodiment, the number of ventilation baffles in each group of battery modules is the same as the number of the first air outlet or the second air outlet, and one end of the cooling channel is set as the air inlet, which is oriented toward the first air outlet or the second air outlet.

[0014] In one embodiment, the end of the cooling channel away from the air outlet is designated as the air outlet end, and the ventilation area of ​​the cooling channel is equal at all points along the direction from the air inlet end to the air outlet end.

[0015] On the other hand, a battery pack is also provided, including the battery air-cooling structure as described above, and also including a housing and at least two battery modules. The top of the housing is open, and a receiving cavity is provided inside the housing. The battery air-cooling structure and the battery modules are both disposed in the receiving cavity. The top of the housing is provided with a cover plate for sealing the receiving cavity.

[0016] In one embodiment, the housing includes an exhaust side panel, and the exhaust side panel is provided with the same number of exhaust ports as the first air outlet or the second air outlet. The exhaust ports are connected to the first air outlet or the second air outlet, and the positions of the exhaust ports are aligned one-to-one with the positions of the first air outlet or the second air outlet along the first direction.

[0017] In one embodiment, the exhaust area of ​​the vent is larger than the exhaust areas of the first exhaust hole and the second exhaust hole, respectively.

[0018] In one embodiment, the battery module is spaced apart from the circulating air duct and the exhaust side plate, respectively.

[0019] In one embodiment, the battery pack further includes a second heat insulation component. The battery air-cooling structure includes a ventilation partition disposed between two adjacent battery cells. The second heat insulation component is disposed between the battery module and the circulating air duct. A first airflow channel is disposed inside the second heat insulation component. One end of the first airflow channel is connected to the first air outlet or the second air outlet, and the other end of the first airflow channel is connected to the cooling channel inside the ventilation partition.

[0020] In one embodiment, the battery pack further includes a third heat insulation component disposed between the battery module and the exhaust side plate, the third heat insulation component having a second airflow channel communicating with the exhaust port and the cooling channel respectively.

[0021] In one embodiment, the housing further includes an air inlet and an air outlet side panel, which is provided with an air inlet mounting port and an air outlet mounting port. One end of the circulating air duct with the air inlet extends out of the housing through the air inlet mounting port and is connected to an external air-cooling mechanism. The other end of the circulating air duct with the air outlet extends out of the housing through the air outlet mounting port and is connected to the external air-cooling mechanism.

[0022] The beneficial effects of this utility model are:

[0023] This invention discloses a battery air-cooling structure. By placing a circulating air duct between two adjacent battery modules to separate them, and by providing a first air outlet in a first air duct and a second air outlet in a second air duct, the circulating air duct outputs cooling gas from the middle towards the battery modules on both sides. Each battery module directly receives cooling gas from the circulating air duct for cooling. Compared to traditional single-sided air intake designs where cooling gas must pass through multiple battery modules sequentially, resulting in increased cooling gas temperature after heat exchange with the preceding battery module, and thus poor cooling effect on subsequent battery modules, this invention effectively reduces the mutual influence between battery modules and improves cooling efficiency.

[0024] Furthermore, the air outlet area of ​​the multiple first air outlets gradually increases in the direction away from the air inlet, and the air outlet area of ​​the multiple second air outlets gradually increases in the direction away from the connection between the second air duct and the first air duct. This ensures that the output of cooling gas entering the first and second air outlets sequentially along the air inlet gradually increases through the first and second air outlets. This ensures that the cooling effect of each cell in the battery module is consistent along the airflow direction of the first and second air ducts, improves the cooling uniformity of the entire battery pack, reduces the temperature difference between individual cells, and improves the heat dissipation performance and service life of the battery pack. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the battery air-cooling structure in one embodiment;

[0026] Figure 2 This is a schematic diagram of the circulating air duct in one embodiment;

[0027] Figure 3 This is a side view of the circulating air duct in one embodiment;

[0028] Figure 4 yes Figure 3 Cross-sectional view of AA;

[0029] Figure 5 This is a cross-sectional view of the circulating air duct in one embodiment;

[0030] Figure 6 This is a schematic diagram of the battery pack structure in one embodiment;

[0031] Figure 7 This is a schematic diagram of the battery pack (without the cover) in one embodiment;

[0032] Figure 8 This is a schematic diagram of the box structure in one embodiment;

[0033] Figure 9 This is a side view of the battery pack in one embodiment;

[0034] Figure 10 This is a top view of the battery pack (without the cover) in one embodiment.

[0035] In the picture:

[0036] 1. Battery module; 11. Battery cell; 2. Housing; 21. Receiving cavity; 22. Cover plate; 23. Exhaust side panel; 24. Exhaust port; 25. Inlet and outlet side panels; 26. Inlet mounting port; 27. Outlet mounting port; 3. Second heat insulation component; 31. First airflow channel; 4. Third heat insulation component; 41. Second airflow channel;

[0037] 100. Circulating air duct; 101. Air inlet duct; 102. Return air duct; 103. Connecting pipe; 110. First air duct; 111. Air inlet; 120. Second air duct; 121. Air outlet; 131. First air outlet; 132. Second air outlet; 140. Thermal insulation gap; 150. First thermal insulation component; 160. Air duct partition; 200. Ventilation partition; 210. Air inlet end; 220. Air outlet end. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] like Figures 1 to 4 As shown, a battery air-cooling structure in this embodiment includes a hollow circulating air duct 100. The circulating air duct 100 is disposed between two adjacent battery modules 1. A first air duct 110 and a second air duct 120 are disposed inside the circulating air duct 100. The lengths of the first air duct 110 and the second air duct 120 both extend along a first direction. One end of the first air duct 110 is provided with an air inlet 111, and the end of the first air duct 110 away from the air inlet 111 is connected to the second air duct 120. On one side of the circulating air duct 100 facing one of the battery modules 1, there are multiple first air outlets 131 that communicate with the first air duct 110. On the other side of the circulating air duct 100 facing the other battery module 1, there are multiple second air outlets 132 that communicate with the second air duct 120. The air outlet area of ​​the multiple first air outlets 131 gradually increases in the direction away from the air inlet 111, and the air outlet area of ​​the multiple second air outlets 132 gradually increases in the direction away from the connection between the second air duct 120 and the first air duct 110.

[0043] In traditional single-sided air intake designs, cooling gas needs to pass through multiple battery modules 1 sequentially. After exchanging heat with the preceding battery module 1, the cooling gas temperature rises, resulting in poor heat exchange with subsequent battery modules 1. Consequently, the cooling efficiency of subsequent battery modules 1 is consistently lower than that of preceding battery modules 1, leading to poor heat dissipation uniformity of the entire battery pack. In this embodiment, by placing a circulating air duct 100 between two adjacent battery modules 1 to separate them, and by providing a first air outlet 131 in the first air duct 110 and a second air outlet 132 in the second air duct 120, the circulating air duct 100 outputs cooling gas from the middle towards the battery modules 1 on both sides. That is, each battery module 1 directly receives cooling gas directly output from the circulating air duct 100 for cooling. Compared to the traditional single-sided air intake design, where the cooling gas needs to pass through multiple battery modules 1 sequentially, and the cooling gas temperature rises after exchanging heat with the preceding battery module 1, the cooling effect on the subsequent battery module 1 is poor. This invention can effectively reduce the mutual influence between battery modules 1 and improve cooling efficiency.

[0044] Furthermore, the air outlet area of ​​the multiple first air outlets 131 gradually increases in the direction away from the air inlet 111, and the air outlet area of ​​the multiple second air outlets 132 gradually increases in the direction away from the connection between the second air duct 120 and the first air duct 110. This ensures that the output of cooling gas entering the first air outlet and the second air outlet sequentially along the air inlet 111 through the first air outlet 131 and the second air outlet 132 gradually increases. This ensures that the cooling effect of each cell 11 in the battery module 1 is consistent along the airflow direction of the first air duct 110 and the second air duct 120, improves the cooling uniformity of the entire battery pack, reduces the temperature difference between each cell 11, and improves the heat dissipation performance and service life of the battery pack.

[0045] In one embodiment, the circulating air duct 100 includes an inlet air duct 101 and a return air duct 102 that are interconnected. The inlet air duct 101 and the return air duct 102 are arranged along a second direction, which is set at an angle to the first direction. An air inlet 111 is provided at one end of the inlet air duct 101. A first air duct 110 is provided inside the inlet air duct 101, and a second air duct 120 is provided inside the return air duct 102. A first air outlet 131 is opened on the side of the inlet air duct 101 away from the return air duct 102, and a second air outlet 132 is opened on the side of the return air duct 102 away from the inlet air duct 101. The inlet air duct 101 and the return air duct 102 are connected to form the circulating air duct 100. The air inlet pipe 101 and the air outlet pipe each cool a separate set of battery modules 1. The overall circulating air pipe 100 adopts a single-sided air outlet setting, which can ensure the smoothness of air outlet. Furthermore, by placing the circulating air pipe 100 between two adjacent sets of battery modules 1, the mutual influence between the two sets of battery modules 1 is reduced.

[0046] In one embodiment, the air inlet duct 101 and the air return duct 102 are spaced apart along a second direction. The circulating air duct 100 also includes a connecting pipe 103, which is located at the end of the air inlet duct 101 away from the air inlet 111, and connects the air inlet duct 101 and the air return duct 102. The spaced-apart arrangement of the air inlet duct 101 and the air return duct 102 effectively prevents the cooling gas in the air inlet duct 101 from interacting with the cooling gas in the air return duct 102.

[0047] Furthermore, a heat insulation gap 140 is formed between the air inlet duct 101 and the return air duct 102, and a first heat insulation element 150 is provided in the heat insulation gap 140 to further ensure the heat insulation between the air inlet duct 101 and the return air duct 102.

[0048] In one embodiment, such as Figure 5 As shown, the circulating air duct 100 can also adopt other structural designs, such as having an air duct baffle 160 inside the circulating air duct 100. The air duct baffle 160 divides the interior of the circulating air duct 100 into a first air duct 110 and a second air duct 120. One end of the air duct baffle 160 along the first direction is adjacent to the air inlet 111, and the other end is spaced apart from the inner sidewall of the circulating air duct 100 to form a communication port connecting the first air duct 110 and the second air duct 120. In actual operation, an air duct baffle 160 with heat insulation properties can also be used to improve the heat insulation between the air inlet duct 101 and the return air duct 102, avoid mutual interference between the cooling gas in the air inlet duct 101 and the cooling gas in the return air duct 102, and improve the cooling and heat dissipation effect.

[0049] In one embodiment, an air outlet 121 is also provided on the circulating air duct 100. The air outlet 121 is connected to the second air duct 120. The air outlet 121 and the air inlet 111 are located on the same side of the circulating air duct 100 along the first direction. In actual operation, the circulating air duct 100 has a U-shaped or similar annular design. Compared with the traditional single-sided air inlet and single-sided air outlet design, this extends the flow time of the cooling gas in the circulating air duct 100, allowing the cooling gas to fully cool the battery pack. Furthermore, the temperature of the cooling gas in the circulating air duct 100 gradually increases from the air inlet 111 to the air outlet 121, and its flow speed gradually decreases. Thus, the higher-temperature cooling gas flows through the battery cell 11 at a slower speed, meaning that the higher-temperature cooling gas has a longer heat exchange and cooling time with the battery cell 11. This ensures that the cooling efficiency of the higher-temperature cooling gas on the battery cell 11 is as consistent as possible with that of the lower-temperature cooling gas, guaranteeing the uniformity of heat dissipation of the entire battery pack.

[0050] Furthermore, compared to some traditional technologies that directly open exhaust vents 24 on the side wall of the battery pack housing 2, this embodiment sets an exhaust vent 121 on the circulating air duct 100. Cooling gas enters from the air inlet 111 and exits through the air outlet 121 to form a smooth airflow channel, making the cooling gas flow more smoothly. This reduces the possibility of airflow short circuits or internal circulation of cooling gas in some structural dead corners of the battery pack housing 2, which is conducive to the timely discharge of cooling gas and improves the heat dissipation performance and service life of the entire battery pack.

[0051] In actual operation, the air inlet 111 and the air outlet 121 are set to face the same side, which also facilitates the connection between the air inlet 111 and the air outlet 121 and the external air-cooling mechanism (not shown in the figure). This can effectively reduce the amount of connecting pipes 103 between the air inlet 111, the air outlet 121 and the external air-cooling mechanism, and also reduce the difficulty of arranging the connecting pipes 103.

[0052] In one embodiment, the ventilation area of ​​the first air duct 110 gradually increases in the direction away from the air inlet 111, and the ventilation area of ​​the second air duct 120 gradually increases in the direction away from the connection point between the second air duct 120 and the first air duct 110. As the cooling gas flows sequentially along the first air duct 110 and the second air duct 120, the flow velocity of the cooling gas gradually decreases, and the temperature of the cooling gas gradually increases. Therefore, the higher-temperature cooling gas flows through the battery cell 11 at a slower speed, meaning the heat exchange and cooling time between the higher-temperature cooling gas and the battery cell 11 is longer. This ensures that the cooling efficiency of the higher-temperature cooling gas on the battery cell 11 is as consistent as possible with that of the lower-temperature cooling gas, thus guaranteeing consistent cooling effect for all battery cells 11 along the cooling gas flow direction in the battery module 1. This improves the cooling uniformity of the overall battery pack, reduces the temperature difference between individual battery cells 11, and enhances the heat dissipation performance and lifespan of the battery pack.

[0053] In one embodiment, the battery air-cooling structure further includes multiple ventilation baffles 200. Each ventilation baffle 200 is disposed between two adjacent cells 11 in the battery module 1. A cooling channel (not shown in the figure) is provided within the ventilation baffle 200, which is connected to the circulating air duct 100 and extends through the ventilation baffle 200 along a second direction. All cells 11 of the battery module 1 are arranged along a first direction, which is perpendicular to the second direction. Specifically, cooling gas is discharged from the air outlet and flows through the cooling channel within the ventilation baffle 200, allowing the cooling gas to cool and dissipate heat from the cells 11 located on both sides of the cooling channel. The cooling gas flows along the opposite end faces of two adjacent cells 11, ensuring uniform and sufficient cooling of the corresponding end faces of the two cells 11, thus improving the heat dissipation effect.

[0054] In one embodiment, the number of ventilation baffles 200 in each battery module 1 is the same as the number of first air outlets 131 or second air outlets 132. One end of the cooling channel is set as an air inlet 210, which faces the first air outlet 131 or second air outlet 132, so that the cooling gas in the circulating air duct 100 can quickly enter the cooling channel from the air inlet 210 through the first air outlet 131 or second air outlet 132 to cool and dissipate heat from the battery cell 11, thereby improving heat dissipation efficiency.

[0055] In one embodiment, the end of the cooling channel away from the air outlet is set as the air outlet 220, and the air outlet 220 is set toward the exhaust port 24 on the battery pack housing 2, so that the cooling gas that has completed the cooling of the battery cell 11 can be quickly discharged to the outside of the housing 2 through the air outlet 220 to ensure the cooling effect.

[0056] In one embodiment, the ventilation area of ​​the cooling channel is equal at all points along the direction from the air inlet 210 to the air outlet 220, thereby ensuring the smooth flow of cooling gas in the cooling channel and enabling the cooling gas to stably and continuously dissipate heat to the battery cells 11 located on both sides of the ventilation baffle 200, thereby improving the heat dissipation efficiency.

[0057] like Figures 6 to 10 As shown, in this embodiment, a battery pack is also provided, including the battery air-cooling structure as described above, and a housing 2. The housing 2 has a receiving cavity 21 for placing at least two sets of battery modules 1, and each set of battery modules includes multiple battery cells 11. In this embodiment, the top of the housing 2 is open, and a cover plate 22 for sealing the receiving cavity 21 is provided on the top of the housing 2. By covering the opening at the top of the housing 2 with the cover plate 22, the protective performance of the housing 2 for the battery modules 1 is improved.

[0058] In practical operation, a structure with an open bottom for the housing 2 can also be adopted, with the housing 2 and cover 22 being an integral structure. The bottom of the housing 2 has a base plate for sealing the receiving cavity 21. By covering the open bottom of the housing 2 with the base plate, the protective performance of the housing 2 for the battery module 1 can be improved. Furthermore, the base plate can be a liquid-cooled base plate or an air-cooled base plate, which can further improve the cooling effect on the battery module 1. Of course, in other embodiments, a structure with open sides for the housing 2 can also be adopted, as long as it allows the battery module 1 to be placed and sealed and fixed within the receiving cavity 21. Such designs are all within the protection scope of this utility model.

[0059] In one embodiment, the housing 2 includes an exhaust side panel 23, on which are provided exhaust ports 24 in the same number as the first air outlet 131 or the second air outlet 132. The exhaust ports 24 communicate with the first air outlet 131 or the second air outlet 132, and the positions of the exhaust ports 24 and the positions of the first air outlet 131 or the second air outlet 132 are aligned one-to-one along a first direction. Specifically, the housing 2 has exhaust side panels 23 on both sides along a second direction, with the exhaust ports 24 on one exhaust side panel 23 communicating with the first air outlet 131, and the exhaust ports 24 on the other exhaust side panel 23 communicating with the second air outlet 132. The projection of the air outlet opening on the vertical plane at least partially overlaps with the opening of the exhaust port 24. This ensures that the cooling gas discharged from the air outlet, after heat exchange with the battery cell 11 through the cooling channel, can be promptly discharged from the exhaust port 24 to the outside of the housing 2, avoiding problems such as airflow short-circuiting or internal circulation within the housing 2, thus improving heat dissipation. In actual operation, such as... Figure 9 As shown, taking the first air outlet 131 as an example, the opening range of the first air outlet 131 is completely located within the opening range of the exhaust port 24 on the vertical plane, so as to ensure that the cooling gas in the box 2 can be discharged to the outside of the box 2 in a timely manner through the exhaust port 24.

[0060] Furthermore, the exhaust area of ​​the vent 24 is larger than that of the first exhaust hole 131 and the second exhaust hole 132, respectively, to further ensure that the cooling gas discharged from the first exhaust hole 131 and the second exhaust hole 132 can be discharged from the housing 2 in a timely manner, thereby further improving the overall heat dissipation effect of the battery pack. In this embodiment, as shown... Figure 9 As shown, taking the first air outlet 131 as an example, the cooling gas discharged from the first air outlet 131 can be discharged from the box 2 in a timely manner through the exhaust port 24.

[0061] like Figure 10 As shown, in one embodiment, the battery module 1 is spaced apart from the circulating air duct 100 and the exhaust side plate 23 to avoid the battery module 1 affecting the cooling gas in the circulating air duct 100, and to prevent the battery module 1 from transferring heat to the exhaust side plate 23, causing the exhaust side plate 23 to overheat and thus affecting other components arranged near the exhaust side plate 23.

[0062] Furthermore, the battery pack also includes a second heat insulation component 3 and a third heat insulation component 4 to further ensure the heat insulation performance between the battery module 1 and the circulating air duct 100 and the exhaust side plate 23, respectively. The battery air-cooling structure includes a ventilation partition 200 disposed between two adjacent battery cells 11. The second heat insulation component 3 is disposed between the battery module 1 and the circulating air duct 100, and has a first airflow channel 31 within it. One end of the first airflow channel 31 is connected to either the first air outlet 131 or the second air outlet 132, and the other end is connected to a cooling channel within the ventilation partition 200. The third heat insulation component 4 is disposed between the battery module 1 and the exhaust side plate 23, and has a second airflow channel 41 connected to both the exhaust port 24 and the cooling channel. The first airflow channel 31 and the second airflow channel 41 ensure smooth flow of cooling gas within the housing 2.

[0063] like Figure 8 As shown, in one embodiment, the housing 2 also includes an air inlet / outlet side panel 25. The air inlet / outlet side panel 25 is provided with an air inlet mounting port 26 and an air outlet mounting port 27. One end of the circulating air duct 100 with an air inlet 111 extends out of the housing 2 through the air inlet mounting port 26 to connect with an external air-cooling mechanism. The other end of the circulating air duct 100 with an air outlet 121 extends out of the housing 2 through the air outlet mounting port 27 to connect with an external air-cooling mechanism. This can effectively reduce the use of external pipelines and avoid connecting pipelines inside the housing 2 to reduce the difficulty of pipeline layout.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery air-cooling structure, characterized in that, The device includes a hollow circulating air duct (100) disposed between two adjacent battery modules (1). The circulating air duct (100) contains a first air duct (110) and a second air duct (120). Both the first air duct (110) and the second air duct (120) extend along a first direction. One end of the first air duct (110) has an air inlet (111), and the end of the first air duct (110) away from the air inlet (111) is connected to the second air duct (120). The circulating air duct (100) faces one of the modules. One side of the battery module (1) is provided with a plurality of first air outlets (131) communicating with the first air duct (110). The circulating air duct (100) is provided with a plurality of second air outlets (132) communicating with the second air duct (120) on the side facing the other battery module (1). The air outlet area of ​​the plurality of first air outlets (131) gradually increases in the direction away from the air inlet (111), and the air outlet area of ​​the plurality of second air outlets (132) gradually increases in the direction away from the connection between the second air duct (120) and the first air duct (110).

2. The battery air-cooling structure according to claim 1, characterized in that, The circulating air duct (100) includes an inlet duct (101) and a return duct (102) that are interconnected. The inlet duct (101) and the return duct (102) are arranged along a second direction, which is at an angle to the first direction. The air inlet (111) is located at one end of the inlet duct (101). The first air duct (110) is located inside the inlet duct (101). The second air duct (120) is located inside the return duct (102). The first air outlet (131) is opened on the side of the inlet duct (101) away from the return duct (102). The second air outlet (132) is opened on the side of the return duct (102) away from the inlet duct (101). The inlet duct (101) and the return duct (102) are connected to form the circulating air duct (100).

3. The battery air-cooling structure according to claim 2, characterized in that, The air inlet pipe (101) and the air return pipe (102) are spaced apart along the second direction. The circulating air pipe (100) also includes a connecting pipe (103). The connecting pipe (103) is located at the end of the air inlet pipe (101) away from the air inlet (111), and the connecting pipe (103) connects the air inlet pipe (101) and the air return pipe (102).

4. The battery air-cooling structure according to claim 3, characterized in that, A heat insulation gap (140) is formed between the air inlet pipe (101) and the air return pipe (102), and a first heat insulation element (150) is provided in the heat insulation gap (140).

5. The battery air-cooling structure according to claim 1, characterized in that, The circulating air duct (100) is provided with an air duct partition (160), which divides the interior of the circulating air duct (100) into a first air duct (110) and a second air duct (120). One end of the air duct partition (160) along the first direction is adjacent to the air inlet (111), and the other end is spaced from the inner side wall of the circulating air duct (100) to form a communication port connecting the first air duct (110) and the second air duct (120).

6. The battery air-cooling structure according to any one of claims 1 to 5, characterized in that, An air outlet (121) is also provided on the circulating air duct (100). The air outlet (121) is connected to the second air duct (120). The air outlet (121) and the air inlet (111) are located on the same side of the circulating air duct (100) along the first direction.

7. The battery air-cooling structure according to any one of claims 1 to 5, characterized in that, The ventilation area of ​​the first air duct (110) gradually increases in the direction away from the air inlet (111), and the ventilation area of ​​the second air duct (120) gradually increases in the direction away from the connection between the second air duct (120) and the first air duct (110).

8. The battery air-cooling structure according to any one of claims 1 to 5, characterized in that, It also includes multiple ventilation baffles (200), each of which is disposed between two adjacent cells (11) in the battery module (1). A cooling channel is provided in the ventilation baffle (200), which is connected to the circulating air duct (100) and passes through the ventilation baffle (200) along a second direction. All the cells (11) of the battery module (1) are arranged along the first direction, which is perpendicular to the second direction.

9. The battery air-cooling structure according to claim 8, characterized in that, The number of ventilation baffles (200) in each battery module is the same as the number of the first air outlet (131) or the second air outlet (132). One end of the cooling channel is set as an air inlet (210), which is oriented toward the first air outlet (131) or the second air outlet (132).

10. The battery air-cooling structure according to claim 9, characterized in that, The end of the cooling channel away from the air outlet (130) is set as the air outlet (220), and the ventilation area of ​​the cooling channel along the direction from the air inlet (210) to the air outlet (220) is equal in size.

11. A battery pack, characterized in that, The battery air-cooling structure as described in any one of claims 1 to 10 further includes a housing (2) and at least two battery modules (1), wherein a receiving cavity (21) is provided inside the housing, and both the battery air-cooling structure and the battery modules (1) are disposed within the receiving cavity (21).

12. The battery pack according to claim 11, characterized in that, The housing (2) includes an exhaust side plate (23), on which are provided exhaust ports (24) in the same number as the first air outlet (131) or the second air outlet (132). The exhaust ports (24) are connected to the first air outlet (131) or the second air outlet (132), and the positions of the exhaust ports (24) are aligned with the positions of the first air outlet (131) or the second air outlet (132) along the first direction.

13. The battery pack according to claim 12, characterized in that, The exhaust area of ​​the exhaust port (24) is greater than the exhaust areas of the first exhaust hole (131) and the second exhaust hole (132).

14. The battery pack according to claim 12, characterized in that, The battery module (1) is spaced apart from the circulating air duct (100) and the exhaust side plate (23).

15. The battery pack according to claim 14, characterized in that, It also includes a second heat insulation component (3). The battery air-cooling structure includes a ventilation partition (200) disposed between two adjacent cells (11). The second heat insulation component (3) is disposed between the battery module (1) and the circulating air duct (100). A first airflow channel (31) is disposed inside the second heat insulation component (3). One end of the first airflow channel (31) is connected to the first air outlet (131) or the second air outlet (132). The other end of the first airflow channel (31) is connected to the cooling channel inside the ventilation partition (200).

16. The battery pack according to claim 15, characterized in that, It also includes a third heat insulation component (4), which is disposed between the battery module (1) and the exhaust side plate (23). The third heat insulation component (4) is provided with a second airflow channel (41) that is connected to the exhaust port (24) and the cooling channel respectively.

17. The battery pack according to any one of claims 11 to 16, characterized in that, The housing (2) also includes an air inlet and outlet side plate (25), on which an air inlet mounting port (26) and an air outlet mounting port (27) are provided. One end of the circulating air duct (100) with the air inlet (111) passes through the air inlet mounting port (26) and extends out of the housing (2). One end of the circulating air duct (100) with the air outlet (121) passes through the air outlet mounting port (27) and extends out of the housing (2).

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