Flow-promoting circulating temperature-adjusting type battery pack assembly

Abstract

The invention relates to the technical field of battery packs, in particular to a flow promoting circulation temperature adjusting type battery pack assembly which comprises an upper shell, a lower shell and a plurality of battery modules, each battery module further comprises a plurality of battery cells, and the battery pack assembly further comprises an air inlet assembly, a heat dissipation assembly and a water drainage assembly. By arranging the air inlet assembly, the flowing path of cooling air in the battery pack is changed by utilizing the air inlet assembly, so that hot air convection in a rising state is generated between the air inlet assembly and the battery cells, and the temperature of regions of different heights of each battery cell is approximately kept consistent while a cooling effect is achieved; therefore, the service life of the battery cells is guaranteed while the cooling effect of the battery cells is guaranteed, in addition, the cooling gas from top to bottom can accelerate the dripping speed of condensate water which gradually falls due to the influence of gravity, the condensate water is promoted to quickly flow out of the area between the battery cells, the dryness between the battery cells is kept, and the environment in the battery pack is further improved.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, specifically to a flow-promoting, temperature-regulating battery pack assembly. Background Technology

[0002] As the core energy storage unit in new energy vehicles and energy storage systems, the stability and safety of the battery pack are of paramount importance. A battery pack typically consists of individual battery cells, battery modules, a battery management system, a thermal management system, and structural support components. These components work together to achieve the storage, release, and efficient management of electrical energy.

[0003] However, heat generation remains a critical challenge during battery pack operation. Battery packs generate significant amounts of heat during charging and discharging, primarily from Joule heating and chemical reaction heat. Traditional air-cooling solutions address this by installing a fan on one side of the battery pack to drive airflow. However, this approach has significant drawbacks. Firstly, as the airflow continuously absorbs heat as it passes through the battery modules, its temperature gradually increases, and the flow rate decreases due to frictional resistance. Once the airflow speed drops to a certain level, the temperature of the cells further away from the battery pack will be significantly higher than that of the cells closer to the battery pack. This temperature difference is extremely detrimental to the battery pack's performance and lifespan, and it creates a significant temperature gradient. Secondly, as the temperature gradient increases, heat transfer efficiency decreases accordingly, further exacerbating the risk of localized overheating.

[0004] In addition, during actual driving, electric vehicles are subject to alternating effects of different climatic environments on the vehicle body and battery pack. The impact of ambient humidity is mainly reflected in humidity diffusion. Water vapor in humid environments may seep into the battery pack through seams or aged seals. Furthermore, since the battery pack is typically mounted on the vehicle chassis, splashing water may impact the chassis when the vehicle is wading through water or driving on flooded roads, allowing moisture to enter the battery pack through drain holes or wiring harness interfaces. This infiltrated water vapor condenses under alternating temperature and humidity conditions inside the battery pack, adhering to the circuit boards or cell surfaces. This leads to decreased insulation performance, increased leakage current, and even electrical safety risks such as short circuits. Simultaneously, the condensate film covering the metal heat dissipation surface reduces heat conduction efficiency, hindering effective heat exchange between airflow and the heat dissipation surface.

[0005] To address this, a flow-promoting, temperature-regulating battery pack assembly is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a flow-promoting, temperature-regulating battery pack assembly that solves the problems of reduced airflow velocity and increased heat when cooling air flows through the battery cells, resulting in uneven heat distribution among the cells in different locations within the battery pack, and the impact of humid environments on heat dissipation within the battery pack. By altering the flow path of the cooling airflow within the battery pack through the air intake assembly, it achieves a cooling effect through convection with naturally rising hot air, and also accelerates the condensate to slide off the battery modules, thereby reducing the temperature while avoiding the negative impact of humid environments on the battery pack.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A flow-promoting, temperature-regulating battery pack assembly includes an upper shell, a lower shell, and multiple battery modules. Each battery module contains multiple battery cells. The assembly also includes an air intake component, a heat dissipation component, and a drainage component. The air intake component is connected to the upper and lower shells, the heat dissipation component is connected to the battery modules, and the drainage component is connected to the lower shell. The air intake component includes a fan and a filter. The fan is connected to the outside of the upper and lower shells, and the filter is connected to the fan. The filter is positioned below the fan, with its filtering surface inclined towards the lower shell. The fan draws in air filtered by the filter and blows the cooling gas downwards through the upper shell towards the battery modules. The heat dissipation component absorbs heat from the surface of the battery modules and carries it away through the cooling airflow. Simultaneously, condensate on the surface of the heat dissipation component drips into the drainage component and flows towards the filter.

[0009] The above solution addresses the issue that, since hot air flows upwards between battery modules, the heat at the top of each cell is typically greater than at the bottom. Therefore, this solution uses an air intake assembly to alter the airflow path, directing the cooling air downwards to create convection with the rising hot air. This achieves both heat dissipation and ensures temperature uniformity across different areas of the cell. Simultaneously, because condensate flows downwards due to gravity, the downward-flowing cooling airflow in this solution follows this trend, accelerating its flow and removing humid air from the battery pack, thus improving the internal environment. Furthermore, a drainage assembly collects the blown-down condensate, which is then discharged to the filter screen after reaching a certain volume, flushing the screen and ensuring its filtration effectiveness over long-term use.

[0010] Preferably, the air inlet assembly further includes an upper air inlet, a lower air inlet, an upper air duct, a lower air duct, a first air slot, a second air slot, an air outlet plate, and an air outlet. The upper air inlet and the lower air inlet are both located on the right edge of the upper shell. The upper air duct is connected to the upper air inlet, and the lower air duct is connected to the lower air inlet. The first air slot is located near the fan and is connected to the upper air duct. The second air slot is located away from the fan and is connected to the lower air duct. The air outlet plate is located in the first air slot and the second air slot, and the air outlet is located on the air outlet plate.

[0011] With the above solution, air ducts of different depths are provided above the battery modules at different distances from the fan, namely the first air duct and the second air duct. The first air duct is closer to the fan, while the second air duct is farther away from the fan. Therefore, the depth of the first air duct is greater than that of the second air duct. At the same time, upper and lower air ducts are set to distinguish the flow channels to the first and second air ducts, so that the airflow speed of the cooling air blowing to the battery modules at different positions is as similar as possible, thereby ensuring the uniformity of heat dissipation of multiple battery modules inside the battery pack.

[0012] Preferably, the air outlet is a through hole in the shape of an elongated waist, and the size of the opening at the top of the air outlet is larger than the size of the opening at the bottom.

[0013] With the above solution, when the cooling airflow moves from the first or second air duct toward the battery module, it will flow from the area with the larger air outlet opening to the area with the smaller opening, thus accelerating the flow rate of the cooling airflow and enhancing the cooling effect.

[0014] Preferably, the heat dissipation component includes fins, which are connected to the battery cell, and the surface of the fins is coated with a hydrophilic coating.

[0015] The above solution utilizes fins that adhere closely to the battery cell to absorb its heat, increasing the heat dissipation area and thus achieving a heat dissipation effect. On the other hand, the fins coated with a hydrophilic coating can promote the rapid flow of condensate and cause most of the water vapor in the battery pack to condense on the fins rather than in other more difficult-to-handle locations. The condensate can also flow downwards with the cooling airflow, preventing it from affecting the normal use of the battery cell.

[0016] Preferably, an extension plate is connected above the fin, the extension plate is arc-shaped, and the extension plates between two adjacent cells form a funnel shape.

[0017] With the above solution, since the distance between the two fins is short, the extension plate can ensure that there is sufficient cooling airflow between the two fins. As the gas flows downward, the flow rate of the cooling airflow will gradually increase, thereby enhancing the heat dissipation effect of the airflow and the ability to remove condensate.

[0018] Preferably, a water collecting groove is formed on the surface of the fin away from the battery cell. The water collecting groove is in a "human" shape, and a hydrophobic coating is applied on the inner surface of the water collecting groove.

[0019] Through the above solution, the water collecting groove can guide the condensate to flow along the groove, and the hydrophobic coating can make the condensate form larger water droplets, so as to promote the rapid discharge of the condensate.

[0020] Preferably, a plurality of impellers are further provided between the fins of every two battery cells, and all the impellers are arranged close to the water collecting groove.

[0021] Through the above solution, it can drive the local air flow near the water collecting groove, thereby strengthening the gas flow near the water collecting groove, and then accelerating the dripping of the condensate accumulated in the water collecting groove.

[0022] Preferably, the upper surface inside the lower shell is divided into a first inclined surface and a second inclined surface, and the slope of the first inclined surface is smaller than that of the second inclined surface; the drainage component includes a hinge rod and a water baffle, the hinge rod is connected to the lower shell, the water baffle is connected to the hinge rod, and the weight of the part of the water baffle on the left side of the hinge rod is greater than that of the part on the right side.

[0023] Through the above solution, when the condensate drips from the fin, it will first fall on the first inclined surface and flow from the first inclined surface to the water baffle. When the amount of water is small, the condensate will be blocked by the water baffle on its left side. When the condensate accumulates to a certain extent, it will push the water baffle to flip around the hinge rod. After the condensate is discharged, it will reset because the left side of the water baffle is heavier. During this process, the flowing condensate will enter the second inclined surface and accelerate the flow rate due to the slope of the second inclined surface. The water flowing out from the second inclined surface will fall on the filter screen, so as to clean the filter screen every once in a while, and then ensure the use effect of the filter screen.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. In a flow-promoting circulation temperature-regulating battery pack assembly of the present invention, by setting an air inlet component, the air inlet component is used to change the flow path of the cooling gas in the battery pack, so that it convects with the rising hot gas generated between the battery cells, achieving a cooling effect while making the temperatures of different height regions of each battery cell roughly the same, thereby ensuring the cooling effect of the battery cells while ensuring their service life. In addition, the cooling gas from top to bottom will also accelerate the dripping speed of the condensate that gradually falls under the influence of gravity, prompting it to quickly flow out of the area between the battery cells, so as to keep the area between the battery cells dry, and then improve the environment inside the battery pack.

[0026] 2. The present invention provides a flow-promoting circulating temperature-regulating battery pack assembly. By setting an arc-shaped extension plate, it can increase the heat dissipation area and thus improve the heat dissipation effect. On the other hand, the extension plate between two adjacent cells can form a funnel-like structure, which can better collect the cooling airflow blowing down from above and play a converging role. It can also accelerate the cooling airflow as it continues to flow downward, thereby ensuring its heat dissipation effect.

[0027] 3. The present invention provides a flow-promoting, temperature-regulating battery pack assembly. By coating the fin surface with a hydrophilic material, it can promote the rapid flow of condensate. Utilizing the hydrophilic properties, most of the water vapor inside the battery pack condenses on the fin surface, making it easy to be blown off by the cooling airflow flowing from top to bottom, thus facilitating disposal. In addition, by coating the water collection grooves on the fin surface with a hydrophobic material, on the one hand, the water collection grooves disrupt the boundary of condensate on the fin surface, making it less likely to remain on the fin surface; on the other hand, the hydrophobic properties cause the condensate to form larger water droplets, thereby promoting the rapid discharge of condensate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the upper shell of the present invention after partial cross-section;

[0030] Figure 3 This is a schematic diagram of the air intake assembly of the present invention;

[0031] Figure 4 This is a schematic diagram of the battery module structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the heat dissipation component of the present invention;

[0033] Figure 6 This is a schematic diagram of the lower shell structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the drainage component of the present invention;

[0035] Figure 8 This is a diagram showing the state of the drainage plate flipping during drainage according to the present invention.

[0036] In the diagram: 1. Upper shell; 2. Lower shell; 3. Battery module; 4. Battery cell; 5. Air intake assembly; 501. Fan; 502. Filter; 503. Upper air inlet; 504. Lower air inlet; 505. Upper air duct; 506. Lower air duct; 507. First air duct; 508. Second air duct; 509. Air outlet plate; 510. Air outlet; 6. Heat dissipation assembly; 601. Fins; 602. Extension plate; 603. Water collection tank; 604. Impeller; 7. Drainage assembly; 701. Hinge rod; 702. Water baffle; 8. First inclined surface; 9. Second inclined surface. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 8 This invention provides a flow-promoting, temperature-regulating battery pack assembly, the technical solution of which is as follows:

[0039] For details, please refer to Figures 1 to 2A flow-promoting, temperature-regulating battery pack assembly includes an upper shell 1, a lower shell 2, and multiple battery modules 3. Each battery module 3 further contains multiple battery cells 4. The upper shell 1 and lower shell 2 are connected by bolts, and the multiple battery modules 3 are fixed between the upper shell 1 and lower shell 2. The assembly also includes an air intake component 5, a heat dissipation component 6, and a drainage component 7. The air intake component 5 is connected to the upper shell 1 and lower shell 2, the heat dissipation component 6 is connected to the battery modules 3, and the drainage component 7 is connected to the lower shell 2. The system includes a fan 501 and a filter 502. The fan 501 is connected to the outside of the upper shell 1 and the lower shell 2. After the upper shell 1 and the lower shell 2 are fixed, the fan 501 is installed on the right side of the upper shell 1 and the lower shell 2 using bolts. The fan 501 has a dehumidification function, which can filter moisture in the air and send sufficiently dry air between the upper shell 1 and the lower shell 2. The filter 502 is connected to the fan 501 and can filter the outside air, thereby ensuring the cooling gas delivered by the fan 501. Sufficiently clean, the filter 502 is located below the fan 501, and the filter surface of the filter 502 is inclined towards the lower shell 2. Since the hot air between the battery modules 3 flows upward, the heat above each cell 4 is usually greater than that below. In this solution, the fan 501 draws air filtered by the filter 502 from the outside and blows the cooling gas from top to bottom onto the battery module 3 through the upper shell 1, thereby changing the flow path of the cooling airflow. The heat dissipation component 6 absorbs the heat on the surface of the battery module 3 and carries away the heat through the cooling airflow. It also ensures the uniformity of temperature at different positions of the cell 4 due to the rising characteristics of the hot air. At the same time, it causes the condensate on the surface of the heat dissipation component 6 to drip into the drainage component 7, following the flow trend of the condensate, thereby improving the environment inside the battery pack. The drainage component 7 collects the blown-down condensate, and when it reaches a certain amount, it is discharged to the filter 502 to flush the filter 502, thereby ensuring the filtration effect of the filter 502 after long-term use.

[0040] As one embodiment of the present invention, refer to Figure 2 and Figure 3The air intake assembly 5 further includes an upper air inlet 503, a lower air inlet 504, an upper air duct 505, a lower air duct 506, a first air slot 507, a second air slot 508, an air outlet 509, and an air outlet 510. The upper air inlet 503 and the lower air inlet 504 are both located on the right edge of the upper shell 1, with the upper air inlet 503 positioned above the lower air inlet 504. Different air inlets correspond to battery modules 3 at different locations, ensuring that the cooling effect of the cooling gas blowing onto battery modules 3 at different locations is approximately the same. The upper air duct 505 communicates with the upper air inlet 503, and the lower air duct 506 communicates with the lower air inlet 504. The first air slot 507 is located near the fan 501 and is connected to the upper air duct 506. The second air duct 508 is located away from the fan 501 and connected to the lower air duct 506. The first air duct 507 is closer to the fan 501, while the second air duct 508 is farther from the fan 501. Therefore, the depth of the first air duct 507 is greater than that of the second air duct 508, so that the airflow speed of the cooling airflow blowing to different positions of the battery module 3 is as similar as possible. The air outlet plate 509 is located in the first air duct 507 and the second air duct 508. The air outlet 510 is opened on the air outlet plate 509. The air outlet 510 is a through hole in the shape of an elongated hole. The opening size of the upper part of the air outlet 510 is larger than that of the lower part, which can accelerate the flow rate of the cooling airflow and thus enhance the cooling effect.

[0041] As one embodiment of the present invention, refer to Figures 4 to 5 The heat dissipation component 6 includes fins 601, which are connected to the battery cell 4. By adhering the fins 601 to the battery cell 4, the heat from the battery cell 4 is absorbed, increasing the heat dissipation area and thus achieving a heat dissipation effect. The surface of the fins 601 is coated with a hydrophilic coating, which promotes the rapid flow of condensate using its hydrophilic properties. An extension plate 602 is connected above the fins 601. The extension plate 602 is arc-shaped, and the extension plates 602 between two adjacent battery cells 4 form a funnel shape, which ensures that sufficient cooling airflow enters between the two fins 601. The airflow speed is increased as the airflow enters between the fins 601, thereby enhancing the heat dissipation effect of the airflow and the ability to remove condensate.

[0042] On one side surface of the fin 601 away from the battery cell 4, a water collecting groove 603 is formed. The water collecting groove 603 is in a "human" shape, which can break the boundary layer of the condensed water, making it easier to slide off, and can guide the condensed water to flow along the groove. The inner surface of the water collecting groove 603 is coated with a hydrophobic coating, so that the condensed water can form larger water droplets, and then can promote the rapid discharge of the condensed water. Between every two battery cells 4, a plurality of impellers 604 are arranged between the fins 601. The plurality of impellers 604 are all arranged close to the water collecting groove 603. When the cooling gas blows towards the impellers 604, the impellers 604 can be driven to rotate, thereby using the impellers 604 to drive the local air flow, strengthening the gas flow near the water collecting groove 603, and then accelerating the dripping of the condensed water accumulated in the water collecting groove 603.

[0043] As an implementation manner of the present invention, referring to Figure 6 , Figure 7 and Figure 8 , the upper surface inside the lower shell 2 is divided into a first inclined surface 8 and a second inclined surface 9. The slope of the first inclined surface 8 is smaller than that of the second inclined surface 9. The drainage component 7 includes a hinge rod 701 and a water baffle 702. The hinge rod 701 is connected to the lower shell 2, and the water baffle 702 is connected to the hinge rod 701. The shape of the water baffle 702 is similar to an inverted "乀" shape. When the condensed water drips from the fin 601, it will first fall on the first inclined surface 8 and flow from the first inclined surface 8 towards the water baffle 702. When the amount of water is small, the condensed water will be blocked by the water baffle 702 on its left side. When the condensed water accumulates to a certain extent, it will push the water baffle 702 to flip around the hinge rod 701. Also, because the weight of the part of the water baffle 702 on the left side of the hinge rod 701 is greater than that of the part on the right side, after the condensed water is discharged, the water baffle 702 will reset due to the heavier left side. During this process, the flowing condensed water will enter the second inclined surface 9 and accelerate the flow rate due to the slope of the second inclined surface 9. The water flowing out from the second inclined surface 9 will fall on the filter screen 502, thereby cleaning the filter screen 502 every once in a while, and then ensuring the use effect of the filter screen 502.

[0044] The specific working principle is as follows: First, the air intake component 5 is used to change the flow path of the cooling gas, so that the cooling gas is blown from top to bottom towards the battery module 3, thereby enabling convection with the rising hot airflow, ensuring the heat dissipation effect while keeping the temperature of different height areas of the battery cell 4 approximately the same, thus ensuring its service life; Specifically, the fan 501 first draws in the outside air filtered by the filter screen 502 and sends it into the upper air intake 503 and the lower air intake 504, and flows into the first air duct 507 and the second air duct 508 from the upper air duct 505 and the lower air duct 506 respectively, and then blows it towards the battery module 3 below through the air outlet 510 opened on the air outlet plate 509. When the cooling airflow passes through the air outlet 510, its flow speed is accelerated due to the change in shape, thereby ensuring its cooling effect and promoting the gas circulation in the battery pack.

[0045] When the cooling airflow passes through the heat dissipation component 6, it can remove the heat from its surface, thereby achieving a cooling effect on the battery cell 4. On the other hand, it can also accelerate the dripping speed of the condensed water that is gradually falling due to gravity, thereby improving the environment between the battery cells 4 and ensuring their safety in use.

[0046] Specifically, when the cooling gas comes into contact with the extension plate 602, it is accelerated again by the shape of the two adjacent extension plates 602, thus ensuring its cooling effect. The fins 601 that are in contact with the battery cell 4 absorb the heat generated by the battery cell 4 and accelerate the heat dissipation of the battery cell 4 through their larger heat dissipation area. When the cooling gas enters between the fins 601, it will conduct convective heat exchange with the rising hot airflow between the fins 601, thereby cooling the battery cell 4 and ensuring its service life. In addition, as the cooling gas flows downward between the fins 601, it will also cause the condensate on the surface of the fins 601 to slide downward, thereby improving the environment between the battery cells 4. Since the water collection tank 603 can guide the condensate to flow along its shape, a small amount of condensate is easy to remain in the water collection tank 603 during the downward flow. The impeller 604 will rotate under the blowing of the cooling gas, thereby increasing the local gas flow rate near the water collection tank 603, thereby accelerating the dripping of the condensate accumulated in the water collection tank 603.

[0047] The condensate blown down by the cooling gas will drip into the drain assembly 7 and gradually accumulate. When it reaches a certain level, the drain assembly 7 will drain the water to the filter screen 502, thereby periodically cleaning the dust adhering to the filter screen 502, thus ensuring the normal filtration effect of the filter screen 502 while draining the condensate.

[0048] Specifically, when condensate drips from the fins 601, it first falls onto the first inclined surface 8 of the lower shell 2 and slides to the right along the first inclined surface 8, where it is blocked by the baffle plate 702. When the condensate on the left side of the baffle plate 702 accumulates to a certain extent, it causes the baffle plate 702 to flip, allowing the condensate to pass smoothly through the baffle plate 702 and enter the second inclined surface 9. It then flows along the second inclined surface 9 to the surface of the filter screen 502 for cleaning. During this process, the condensate flow rate is accelerated by the more inclined second inclined surface 9, which allows it to maintain sufficient impact force when it falls onto the surface of the filter screen 502, thus ensuring its cleaning effect on the filter screen 502 and guaranteeing the effectiveness of the filter screen 502.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A current-promoting, temperature-regulating battery pack assembly, comprising an upper shell (1), a lower shell (2), and multiple battery modules (3), wherein each battery module (3) further comprises multiple battery cells (4), characterized in that: It further includes an air inlet component (5), a heat dissipation component (6) and a drainage component (7). The air inlet component (5) is connected to the upper shell (1) and the lower shell (2), the heat dissipation component (6) is connected to the battery module (3), and the drainage component (7) is connected to the lower shell (2). The air inlet component (5) includes a fan (501) and a filter screen (502). The fan (501) is connected to the outside of the upper shell (1) and the lower shell (2), and the filter screen (502) is connected to the fan (501). The fan (501) extracts air filtered by the filter screen (502) from the outside and blows the cooling gas downward through the upper shell (1) towards the battery module (3). The heat dissipation component (6) absorbs the heat on the surface of the battery module (3) and takes away the heat through the cooling air flow. At the same time, it causes the condensed water droplets on the surface of the heat dissipation component (6) to drip into the drainage component (7) and flow to the filter screen (502) through the drainage component (7).

2. The current-promoting, temperature-regulating battery pack assembly according to claim 1, characterized in that: The filter screen (502) is arranged below the fan (501), and the filtering surface of the filter screen (502) is inclined towards the direction of the lower shell (2).

3. The current-promoting, temperature-regulating battery pack assembly according to claim 1, characterized in that: The air inlet component (5) further includes an upper air inlet (503), a lower air inlet (504), an upper air duct (505), a lower air duct (506), a first air groove (507), a second air groove (508), an air outlet plate (509) and an air outlet (510). The upper air inlet (503) and the lower air inlet (504) are both opened on the right edge of the upper shell (1). The upper air duct (505) is connected to the upper air inlet (503), and the lower air duct (506) is connected to the lower air inlet (504). The first air groove (507) is arranged near the fan (501) and is connected to the upper air duct (505). The second air groove (508) is arranged far from the fan (501) and is connected to the lower air duct (506). The air outlet plate (509) is arranged in the first air groove (507) and the second air groove (508), and the air outlet (510) is opened on the air outlet plate (509).

4. A flow-promoting, temperature-regulating battery pack assembly according to claim 3, characterized in that: The air outlet (510) is a through hole in the shape of an oblong hole, and the opening size above the air outlet (510) is larger than the opening size below.

5. A flow-promoting, temperature-regulating battery pack assembly according to claim 1, characterized in that: The heat dissipation component (6) includes fins (601). The fins (601) are connected to the battery cells (4), and the surface of the fins (601) is coated with a hydrophilic coating.

6. A flow-promoting, temperature-regulating battery pack assembly according to claim 5, characterized in that: An extension plate (602) is connected above the fins (601). The extension plate (602) is arc-shaped, and the extension plates (602) between adjacent two battery cells (4) form a funnel shape.

7. A flow-promoting, temperature-regulating battery pack assembly according to claim 5, characterized in that: A water collecting groove (603) is formed on the surface of the fins (601) away from the battery cells (4). The water collecting groove (603) is in the shape of a "person", and the inner surface of the water collecting groove (603) is coated with a hydrophobic coating.

8. A flow-promoting, temperature-regulating battery pack assembly according to claim 7, characterized in that: A plurality of impellers (604) are further arranged between the fins (601) of every two battery cells (4), and the plurality of impellers (604) are all arranged near the water collecting groove (603).

9. A flow-promoting, temperature-regulating battery pack assembly according to claim 1, characterized in that: The upper surface inside the lower shell (2) is divided into a first inclined surface (8) and a second inclined surface (9), the slope of the first inclined surface (8) is less than that of the second inclined surface (9); the drainage component (7) includes a hinge rod (701) and a baffle plate (702), the hinge rod (701) is connected to the lower shell (2), the baffle plate (702) is connected to the hinge rod (701), and the weight of the portion of the baffle plate (702) located on the left side of the hinge rod (701) is greater than that on the right side.

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