Battery pack and vehicle

Abstract

This application relates to the field of power battery technology, and in particular to a battery pack and a vehicle. The battery pack includes a battery assembly, an air inlet duct, and an air outlet duct. The battery assembly includes multiple battery cells arranged side by side along a first direction, with a heat dissipation duct formed between any two adjacent battery cells. The air inlet duct and the air outlet duct are located on opposite sides of the battery assembly along a second direction, and both are connected to the heat dissipation duct, so that the air inlet duct, the heat dissipation duct, and the air outlet duct constitute a cooling duct for air cooling of the battery assembly. The air outlet duct is used for exhausting air cooling. Simultaneously, an exhaust port is provided at the end of the battery cell facing the air outlet duct, and an explosion-proof valve is installed at the exhaust port. When the explosion-proof valve opens due to thermal runaway, the exhaust port also connects to the air outlet duct, so as to utilize the air outlet duct as a valve spraying channel. Therefore, this application combines the air outlet duct for air cooling of the battery assembly with the valve spraying channel of the battery cell into one, thereby effectively saving space occupied inside the battery pack and improving the effective utilization rate and energy density of the battery pack's internal space.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a battery pack and vehicle. Background Technology

[0002] As a crucial direction for the global automotive industry's transformation, new energy vehicles have experienced rapid development in my country in recent years. They not only effectively alleviate my country's oil resource shortage but also significantly reduce harmful gas emissions, playing a vital role in environmental protection. Among the key technologies of new energy vehicles, the battery pack, as an energy storage component, has a decisive impact on the vehicle's range and safety.

[0003] Battery pack cooling technology is one of the key technologies for ensuring battery performance and safety. Currently, air-cooling technology is widely used in new energy vehicles due to its advantages such as low cost and simple structure. In a typical air-cooled battery pack design, a dedicated cooling air duct is set up inside the battery pack to guide the flow of external air to remove the heat generated by the battery pack, thereby ensuring that the battery pack's operating temperature remains within a safe range. In addition, to address the risk of battery thermal runaway, a cell injection valve channel is also designed inside the battery pack. This channel connects the cell explosion-proof valve to the outside environment, enabling the timely discharge of thermal runaway gases in the event of cell thermal runaway, ensuring vehicle safety.

[0004] However, in existing air-cooled battery pack designs, cooling air ducts and spray valve channels occupy a large space inside the battery pack, which to some extent limits the effective utilization of the internal space of the battery pack, thus adversely affecting the energy density of the battery pack. Utility Model Content

[0005] The purpose of this utility model is to provide a battery pack and vehicle that combines the cell injection valve channel and the cooling air duct outlet into one, so as to improve the effective utilization rate of the internal space of the battery pack and increase the energy density of the battery pack.

[0006] This utility model provides a battery pack, including a battery pack, an air inlet duct, and an air outlet duct; The battery pack has a first direction and a second direction that are perpendicular to each other; The battery pack includes a plurality of battery cells arranged side by side along the first direction, and a heat dissipation channel is formed between any two adjacent battery cells. The air inlet duct and the air outlet duct are located on opposite sides of the battery pack along the second direction, and each of the heat dissipation ducts is connected to the air inlet duct and the air outlet duct. The battery pack also includes an explosion-proof valve, and each of the battery cells has an exhaust port at one end facing the air outlet for installing the explosion-proof valve, and the exhaust port is configured to be connected to the air outlet.

[0007] Furthermore, the battery pack also includes an air outlet pipe forming the air outlet duct; The air outlet pipe extends along the first direction, and the end of the air outlet pipe facing the battery pack is an open end, and the open end of the air outlet pipe is sealed to the battery pack. The end of the battery pack facing the air outlet is the first end. The first end of the battery pack has a first air outlet between any two adjacent single cells, so as to be connected to the corresponding heat dissipation air duct. Each of the first air outlets and each of the exhaust outlets are opposite to and connected to the open end of the air outlet pipe.

[0008] Furthermore, the battery pack also includes an air inlet pipe forming the air inlet duct; The air inlet pipe is arranged along the first direction, and the end of the air inlet pipe facing the battery pack is an open end, and the open end of the air inlet pipe is sealed to the battery pack. The end of the battery pack facing the air inlet pipe is the second end. The second end of the battery pack has a first air inlet formed in any two adjacent cells to connect with the corresponding heat dissipation air duct. Each of the first air inlets is opposite to and connected to the open end of the air inlet pipe.

[0009] Furthermore, the battery pack also includes a housing, and both the battery pack and the air outlet pipe are located inside the housing; The outer casing includes a bottom shell opposite to the second end of the battery pack. The bottom shell is recessed in a direction away from the battery pack, so that the bottom shell is integrally formed into the air inlet pipe, and the groove forms the air inlet channel.

[0010] Furthermore, the outer casing is provided with a second air inlet and a second air outlet, the second air inlet and the second air outlet are located on opposite sides of the outer casing along the first direction, one end of the air inlet duct is connected to the second air inlet, and one end of the air outlet duct is connected to the second air outlet.

[0011] Furthermore, the battery pack includes a enclosure; For any two adjacent battery cells, a gap is provided between the two battery cells, and the surrounding plate is arranged around the periphery of the gap, so that the heat dissipation air channel is formed between the two battery cells; The enclosure includes a top side panel and a bottom side panel. The top side panel is located on the side of the battery cell facing the air outlet, and the bottom side panel is located on the side of the battery cell facing the air inlet. Both the top side panel and the bottom side panel are provided with openings. The opening of the top side panel is the first air outlet, and the opening of the bottom side panel is the first air inlet.

[0012] Furthermore, the enclosure also includes opposing first and second side plates, which are connected between the top side plate and the bottom side plate, so that the enclosure forms a square frame that is compatible with the battery cell. The enclosure further includes a partition, which is disposed on the top side panel and the bottom side panel; and / or, the partition is disposed on the first side panel and the second side panel; The interior space of the enclosure is divided into two accommodating spaces by the partition along the first direction for the appropriate insertion of the battery cell.

[0013] Furthermore, the top side panel includes a first segment and a second segment, which are spaced apart to form an opening in the top side panel; The bottom side plate has a through hole at the position opposite to the heat dissipation duct to form an opening in the bottom side plate.

[0014] Furthermore, the opening has a length L mm along the width direction of the battery cell, where L is less than the distance between the positive and negative terminals of the battery cell, and the opening of the top side plate is located between the positive and negative terminals. The opening has a width D mm along the thickness direction of the battery cell. In the early stage of the battery cell's lifespan, the gap between two adjacent battery cells is d mm. In the late stage of the battery cell's lifespan, the battery cell has an expansion amount X mm. dX < D < d.

[0015] Furthermore, the distance between the lower surface of the bottom shell and the bottom of the battery pack is less than or equal to mm; The height of the air inlet duct is less than or equal to mm.

[0016] Furthermore, the enclosure also includes a first mounting part, and the top side panel is provided with the first mounting part on both sides of the air outlet duct; The air outlet pipe also includes a second mounting part, and the air outlet pipe is provided with a second mounting part at a position opposite to each of the first mounting parts; Fasteners can be inserted between the first mounting part and the second mounting part to press the bottom of the air outlet tightly against the top of the battery pack.

[0017] This application also provides a vehicle including any of the battery packs described above.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The battery pack provided by this utility model includes a battery pack, an air inlet duct, and an air outlet duct. The battery pack has a first direction and includes multiple battery cells arranged side by side along the first direction, with a heat dissipation duct formed between any two adjacent battery cells. The battery pack also has a second direction perpendicular to the first direction. The air inlet duct and the air outlet duct are located on opposite sides of the battery pack along the second direction. One end of any heat dissipation duct is connected to the air inlet duct, and the other end is connected to the air outlet duct. Thus, the air inlet duct, the heat dissipation duct, and the air outlet duct constitute the cooling air duct of the battery pack, allowing external airflow (such as air) to flow into any heat dissipation duct through the air inlet duct and then be discharged through the air outlet duct, thereby achieving air cooling of the battery cells.

[0019] Meanwhile, the air outlet also serves as a valve channel for the battery cell. Specifically, the end of the battery cell facing the air outlet has an exhaust port, which can be connected to the air outlet, and an explosion-proof valve is installed at the exhaust port. When the battery cell is in normal working condition, the exhaust port is sealed by the explosion-proof valve to ensure the airtightness of the battery. When the battery cell experiences thermal runaway, the explosion-proof valve will open and open the exhaust port, connecting the exhaust port to the air outlet. Thus, the air outlet is used as a valve channel to directionally discharge the high-temperature and high-pressure gas generated inside the battery cell due to thermal runaway.

[0020] Therefore, this application combines the air outlet duct for battery pack air cooling with the spray valve channel of the battery cell into one, so as to effectively save the space occupied inside the battery pack, thereby improving the effective utilization rate and energy density of the battery pack's internal space.

[0021] This utility model also provides a vehicle that includes the aforementioned battery pack, and thus the vehicle also has the beneficial effects of the battery pack. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A partial three-dimensional structural diagram of the battery pack provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the enclosure provided in an embodiment of the present utility model; Figure 3 A schematic diagram of the assembly of the enclosure and the battery cell provided in an embodiment of this utility model; Figure 4 This is a cross-sectional structural diagram of the battery pack provided in an embodiment of the present invention.

[0024] Figure label: 1-Battery pack, 11-Battery cell, 12-Enclosure, 111-Exhaust port, 112-First air outlet, 113-First air inlet, 114-Explosion-proof valve, 121-Opening, 122-First mounting part, 123-Separator, 124-Bottom side plate, 125-Top side plate, 126-First side plate, 127-Second side plate, 13-Heat dissipation duct, 2-Air outlet duct, 3-Air inlet duct, 4-Bottom shell, 5-Air outlet pipe; X - First direction, Y - Second direction. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0030] The following reference Figures 1 to 4This application describes a battery pack and vehicle according to some embodiments.

[0031] The first aspect of this application provides a battery pack, such as Figure 1 and Figure 4 As shown, the battery pack includes a battery pack 1, an air inlet duct 3, and an air outlet duct 2.

[0032] The battery pack 1 has a first direction X. The battery pack 1 includes multiple cells 11. Each of the multiple cells 11 has a thickness direction along the first direction X. The multiple cells 11 are arranged side by side along the first direction X, such that any two adjacent cells 11 have their large surfaces facing each other. Here, the large surfaces of the cell 11 refer to the two opposing surfaces with the largest area of ​​the cell 11, specifically the two opposing surfaces in the thickness direction of the cell 11.

[0033] The battery pack 1 also has a second direction Y perpendicular to the first direction X. Multiple battery cells 11 each have a length direction along the second direction Y, and each battery cell 11 has a top and a bottom opposite each other in the second direction Y. The tops of the multiple battery cells 11 are located on the same side and form the top of the battery pack 1, and the bottoms of the multiple battery cells 11 are located on the same side and form the bottom of the battery pack 1. Specifically, in practical applications, the battery pack is placed horizontally, the second direction Y is vertical, the tops of the battery cells 11 face upwards, and the bottoms of the battery cells 11 face downwards.

[0034] The air inlet duct 3 is located at the bottom of the battery pack 1, and the air outlet duct 2 is located at the top of the battery pack 1 (as described below, the air outlet duct 5 forms the air outlet duct 2). At the same time, a heat dissipation air duct 13 is formed between the large surfaces of any two adjacent battery cells 11. One end of the heat dissipation air duct 13 is connected to the air inlet duct 3, and the other end of the heat dissipation air duct 13 is connected to the air outlet duct 2. Thus, the air inlet duct 3, the heat dissipation air duct 13, and the air outlet duct 2 constitute the cooling air duct of the battery pack 1, so that external airflow (such as air) can flow into any heat dissipation air duct 13 through the air inlet duct 3 and then be discharged through the air outlet duct 2 to achieve air cooling heat dissipation of the large surfaces of the battery cells 11.

[0035] Meanwhile, the air outlet duct 2 also serves as the spray valve channel for the battery cell 11. Specifically, the top of the battery cell 11 is provided with an exhaust port 111, which can be connected to the air outlet duct 2, and an explosion-proof valve 114 is installed at the exhaust port 111. When the battery cell 11 is in normal working condition, the exhaust port 111 is sealed by the explosion-proof valve 114 to ensure the airtightness of the battery. When the battery cell 11 experiences thermal runaway, the explosion-proof valve 114 will open and open the exhaust port 111, connecting the exhaust port 111 to the air outlet duct 2. Thus, the air outlet duct 2 is used as a spray valve channel to directionally discharge the high-temperature and high-pressure gas generated inside the battery cell 11 due to thermal runaway.

[0036] Therefore, this application combines the air outlet duct 2 for air cooling of battery pack 1 with the spray valve channel of battery cell 11 into one, thereby effectively saving the space occupied inside the battery pack and improving the effective utilization rate and energy density of the internal space of the battery pack.

[0037] In this embodiment, preferably, the battery pack further includes an air outlet pipe 5, the interior of which forms an air outlet channel 2; the air outlet pipe 5 extends along the first direction X and is disposed on the top of the battery pack 1, the end of the air outlet pipe 5 facing the battery pack 1 is an open end, and the open end of the air outlet pipe 5 is sealed to the top of the battery pack 1.

[0038] The end of the battery pack 1 facing the air outlet duct 5 is the first end, that is, the end of the battery pack that forms the top is the first end. The top of the battery pack 1 has a first air outlet 112 formed at a position opposite to each heat dissipation duct 13, so that the airflow in the corresponding heat dissipation duct 13 can be discharged. All the first air outlets 112 and all the exhaust ports 111 of the battery cells 11 are arranged in a row along the first direction X on the top of the battery pack 1, and are opposite to the open end of the air outlet duct 5, so that all the first air outlets 112 and all the exhaust ports 111 can be connected to the air outlet duct 2, so as to use the air outlet duct 2 for air cooling of the battery pack 1, and also use the air outlet duct 2 as the spray valve channel in case of thermal runaway of the battery pack 1.

[0039] In this embodiment, preferably, the battery pack further includes an air inlet pipe, the interior of which forms an air inlet channel 3; the air inlet pipe is disposed at the bottom of the battery pack 1 along the first direction X, the end of the air inlet pipe facing the battery pack 1 is an open end, and the open end of the air inlet pipe is sealed to the bottom of the battery pack 1.

[0040] The end of the battery pack 1 facing the air inlet pipe is the second end, that is, the end of the battery pack that forms the bottom is the second end; the bottom of the battery pack has a first air inlet 113 at a position opposite to each heat dissipation air duct 13, so that airflow can flow into the corresponding heat dissipation air duct 13 through the first air inlet 113.

[0041] All the first air inlets 113 are arranged in a row along the first direction X, and all the first air inlets 113 are opposite to the open end of the air inlet pipe, so that all the first air inlets 113 can be connected to the air inlet duct 3 to deliver air cooling air to all the heat dissipation ducts 13 through the air inlet duct 3.

[0042] In this embodiment, preferably, the battery pack further includes a housing, with the battery pack 1 and the air outlet duct 5 both located inside the housing. The housing includes a bottom shell 4 located at the bottom of the battery pack 1. The bottom shell 4 is recessed in a direction away from the battery pack 1 to form a groove, with the opening 121 of the groove facing the bottom of the battery pack 1. Thus, an air inlet duct is integrally formed on the bottom shell, and the groove forms the aforementioned air inlet channel 3. This integrates the air inlet channel 3 for cooling the battery pack 1 into the bottom shell 4 of the battery pack, allowing the air inlet channel 3 and the bottom shell 4 to share the bottom space of the battery pack. This arrangement can increase the distance between the bottom of the battery pack (i.e., the lower surface of the bottom shell 4) and the bottom of the battery pack 1 (also the bottom of the cell 11) to a certain extent, thereby increasing the bottom protection gap of the battery pack. This greatly enhances safety for bottom conditions such as bottom impacts and scraping that the battery pack may encounter when applied to a vehicle, ensuring good protection for the battery pack whether installed inside the vehicle or under the vehicle chassis, without being limited by its location.

[0043] In this embodiment, preferably, the height of the air inlet duct 3 is less than or equal to 40 mm, and the distance between the lower surface of the bottom shell 4 (facing the outside of the battery pack) and the bottom of the battery pack 1 is less than or equal to 60 mm. More preferably, the height of the air inlet duct 3 is greater than or equal to 5 mm, and the distance between the lower surface of the bottom shell 4 and the bottom of the battery pack 1 is greater than or equal to 10 mm. This provides a larger protective gap at the bottom of the battery pack.

[0044] For air inlet duct 3, when the height of air inlet duct 3 is less than 5mm, the flow cross-section of air inlet duct 3 is small, which cannot provide sufficient air for the air cooling of the battery pack. When the height of air inlet duct 3 is greater than 40mm, although it can ensure the air supply for air cooling, it will occupy a lot of space, resulting in an increase in the overall height of the battery pack and affecting the energy density of the battery pack.

[0045] Regarding the distance between the lower surface of the bottom shell 4 (specifically the lower surface where the groove is formed) and the bottom of the battery pack 1, when the distance is less than 10mm, the height of the air inlet duct 3 cannot reach 5mm or more while ensuring that the bottom shell has sufficient thickness (not less than 5mm) to ensure sufficient strength, thus failing to guarantee the ventilation volume for air cooling. When the distance is greater than 60mm, the bottom shell will occupy a large amount of space in the height direction of the battery pack, causing unnecessary space waste and affecting the energy density of the battery pack.

[0046] In this embodiment, preferably, the outer casing is provided with a second air inlet and a second air outlet, which are located on opposite sides of the outer casing along the first direction X. The second air inlet is opposite to and connected to one end of the air inlet duct 3, and the second air outlet is opposite to and connected to one end of the air outlet duct 2. This allows the airflow for cooling the battery pack outside to flow into the air inlet duct 3 through the second air inlet and be diverted to the cooling air duct 13, and finally discharged from the battery pack through the second air outlet, thereby achieving air cooling of the battery pack 1. At the same time, when the battery pack 1 experiences thermal runaway, the high-temperature and high-pressure gas ejected from the cell 11 can also be discharged from the battery pack through the second air outlet and discharged outside the vehicle, preventing heat diffusion and avoiding the escape of harmful gases into the passenger compartment, making the whole vehicle safer.

[0047] In one embodiment of this application, preferably, the battery pack 1 further includes a surrounding plate 12 disposed between any two adjacent battery cells 11. For any two adjacent battery cells 11, the two battery cells 11 are spaced apart by a predetermined distance, so that a gap is formed between the two battery cells 11. The surrounding plate 12 is disposed around the periphery of the gap, thereby forming the aforementioned heat dissipation air duct 13 between the two battery cells 11. At the same time, the surrounding plate 12 includes a plurality of side plates, including a top side plate 125 located at the top of the battery cell 11 and a bottom side plate 124 located at the bottom of the battery cell 11. Both the top side plate 125 and the bottom side plate 124 are provided with openings 121. The opening 121 on the top side plate 125 is the aforementioned first air outlet 112 for the heat dissipation air duct 13 to exit, and the opening 121 on the bottom side plate 124 is the aforementioned first air inlet 113 for the heat dissipation air duct 13 to enter.

[0048] In this embodiment, preferably, the plurality of side plates of the enclosure 12 further include a first side plate 126 and a second side plate 127. The first side plate 126 and the second side plate 127 are arranged opposite to each other and connected between the top side and the bottom side plate 124, so that the enclosure has a square frame adapted to the battery cell 11. One side of the battery cell 11 in the first direction X can be inserted into the enclosure 12 and sealed to the enclosure 12.

[0049] The enclosure also includes partitions. At least two opposite side panels of the enclosure 12 are provided with partitions 123, such as the top side panel 125 and the bottom side panel 124 of the enclosure 12; or the first side panel 126 and the second side panel 127 are provided with partitions 123; or the top side panel 125, the bottom side panel 124, the first side panel 126 and the second side panel 127 are all provided with partitions 123; so that the internal space of the enclosure 12 is divided into two accommodating spaces by the partitions along the first direction X; for any two adjacent battery cells 11, the opposite sides of the two battery cells 11 can be inserted into the two accommodating spaces one by one and separated by the partitions 123; thus, the enclosure 12 can be used to position the two battery cells 11 and to separate the two battery cells 11 to form a heat dissipation duct 13.

[0050] In this embodiment, preferably, a through hole is provided on the bottom side plate 124 at the position opposite to the heat dissipation duct 13, so as to form an opening 121 in the bottom side plate 124 for use as a first air inlet 113. If a partition 123 for separating the two battery cells 11 is provided on the bottom side plate, the partition 123 is intermittent in the area opposite to the through hole, so as to avoid the partition 123 blocking the air intake of the heat dissipation duct.

[0051] In this embodiment, preferably, the exhaust port 111 of the battery cell 11 is located between the positive and negative terminals at the top of the battery cell 11, so that the first air outlet 112 of the heat dissipation duct 13 is also located between the positive and negative terminals. The top side plate 125 needs to pass between the terminals of two adjacent battery cells 11, resulting in the area of ​​the top side plate 125 between the four terminals of the two battery cells 11 being relatively narrow compared to other areas. At this time, the top side plate 125 has a two-segment structure with a break in the middle, that is, the top side plate 125 includes a first segment and a second segment arranged at intervals, and the area where the first segment and the second segment are broken forms the opening 121 of the top side plate 125, which serves as the first air outlet 112.

[0052] In this embodiment, preferably, the positive and negative terminals at the top of the cell 11 are spaced apart along the width direction of the cell 11, and the openings 121 on the top side plate 125 and the bottom side plate 124 have a length L along the width direction of the cell 11, where L is less than the distance between the positive and negative terminals of the cell 11.

[0053] The openings 121 on the top side plate 125 and the bottom side plate 124 have a width D along the thickness direction of the battery cell 11. In the BOL state, that is, at the beginning of the battery cell 11's lifespan, the gap distance between two adjacent battery cells 11 is d. In the EOL state, that is, at the end of the battery cell 11's lifespan, the expansion amount of the battery cell 11 is X, and dX < D < d. Thus, in both the beginning and end of the battery cell 11's lifespan, the openings 121 on the top side plate 125 and the bottom side plate 124 can be kept unobstructed, allowing the airflow for air cooling to flow smoothly within the heat dissipation duct 13, ensuring the stability of air cooling.

[0054] It should be noted that the units for the length L, width D, gap distance d, and expansion amount X mentioned above are all mm (millimeters).

[0055] In this embodiment, preferably, sealant is filled between the periphery of the battery cell 11 and the surrounding plate 12 to ensure a sealed connection between the battery cell 11 and the surrounding plate 12. Preferably, the air inlet duct 3 and the air outlet duct 2 are pressed against the battery pack 1 by a sealing gasket, so that the air inlet duct 3 is sealed to the bottom of the battery pack 1, and the air outlet duct 2 is sealed to the top of the battery pack 1.

[0056] In this embodiment, preferably, each enclosure 12 has a first mounting portion 122 on both sides of the air outlet 2. Specifically, as described above, the top side panel 125 of the enclosure 12 has a two-section structure with a break in the middle, that is, the top side panel 125 includes a first half-side portion and a second half-side portion with a break in the middle. The air outlet 2 is located between the first half-side portion and the second half-side portion. The opposite ends of the first half-side portion and the second half-side portion are provided with the first mounting portion 122. The air outlet 2 is provided with a second mounting portion (not shown in the figure) at the position opposite to the two first mounting portions 122. Fasteners can be inserted between the opposite first mounting portions 122 and the second mounting portions to fix the air outlet 2 to the top of the battery pack 1 and press the bottom of the air outlet 2 tightly against the top of the battery pack 1. This ensures the installation stability of the air outlet 2 on the top of the battery pack 1, so as to stably exhaust air.

[0057] A second aspect of this application provides a vehicle including the battery pack of any of the above embodiments.

[0058] In this embodiment, the vehicle includes a battery pack, and therefore the vehicle has all the beneficial effects of the battery pack, which will not be described in detail here.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery pack, characterized by, It includes a battery pack (1), an air inlet duct (3), and an air outlet duct (2); The battery pack (1) has a first direction (X) and a second direction (Y) that are perpendicular to each other. The battery pack (1) includes a plurality of cells (11) arranged side by side along the first direction (X), and a heat dissipation channel (13) is formed between any two adjacent cells (11). The air inlet duct (3) and the air outlet duct (2) are located on opposite sides of the battery pack (1) along the second direction (Y), and each of the heat dissipation ducts (13) is connected to the air inlet duct (3) and the air outlet duct (2); The battery pack (1) also includes an explosion-proof valve (114), and each of the battery cells (11) has an exhaust port (111) at one end facing the air outlet (2) for installing the explosion-proof valve (114), and the exhaust port (111) is configured to be connected to the air outlet (2).

2. The battery pack of claim 1, wherein, The battery pack also includes an air outlet pipe (5) forming the air outlet duct (2); The air outlet pipe (5) extends along the first direction (X), and the end of the air outlet pipe (5) facing the battery pack (1) is an open end, and the open end of the air outlet pipe (5) is sealed to the battery pack (1). The end of the battery pack (1) facing the air outlet pipe (5) is the first end, and the first end of the battery pack (1) has a first air outlet (112) for air outlet of the heat dissipation duct (13) at a position opposite to each of the heat dissipation ducts (13). Each of the first air outlets (112) and each of the exhaust outlets (111) are opposite to and connected to the open end of the air outlet pipe (5).

3. The battery pack of claim 2, wherein, The battery pack also includes an air inlet pipe forming the air inlet duct (3); The air inlet pipe is arranged along the first direction (X), and the end of the air inlet pipe facing the battery pack (1) is an open end, and the open end of the air inlet pipe is sealed to the battery pack (1). The end of the battery pack (1) facing the air inlet pipe is the second end, and the second end of the battery pack (1) forms a first air inlet (113) for air intake of the heat dissipation air duct (13) at a position opposite to each of the heat dissipation air ducts (13). Each of the first air inlets (113) is opposite to and connected to the open end of the air inlet pipe.

4. The battery pack according to claim 3, characterized in that, The battery pack also includes a housing, and the battery pack (1) and the air outlet pipe are both located inside the housing; The outer casing includes a bottom shell (4) opposite to the second end of the battery pack (1). The bottom shell (4) is recessed in a direction away from the battery pack (1), so that the bottom shell (4) is integrally formed into the air inlet pipe, and the groove forms the air inlet channel (3).

5. The battery pack according to claim 4, characterized in that, The outer casing is provided with a second air inlet and a second air outlet. The second air inlet and the second air outlet are located on opposite sides of the outer casing along the first direction (X). One end of the air inlet duct (3) is connected to the second air inlet, and one end of the air outlet duct (2) is connected to the second air outlet.

6. The battery pack according to claim 3, characterized in that, The battery pack (1) includes a enclosure (12); For any two adjacent battery cells (11), a gap is provided between the two battery cells (11), and the surrounding plate (12) is arranged around the periphery of the gap, so that the heat dissipation air duct is formed between the two battery cells (11); The enclosure (12) includes a top side panel (125) and a bottom side panel (124). The top side panel (125) is located on the side of the battery cell (11) facing the air outlet (2), and the bottom side panel (124) is located on the side of the battery cell (11) facing the air inlet (3). Both the top side panel (125) and the bottom side panel (124) are provided with openings (121). The opening (121) of the top side panel (125) is the first air outlet (112), and the opening (121) of the bottom side panel (124) is the first air inlet (113).

7. The battery pack according to claim 6, characterized in that, The enclosure (12) also includes a first side plate (126) and a second side plate (127) opposite each other. The first side plate (126) and the second side plate (127) are connected between the top side plate (125) and the bottom side plate (124), so that the enclosure (12) forms a square frame that is compatible with the battery cell (11). The enclosure (12) further includes a partition (123), which is disposed on the top side panel (125) and the bottom side panel (124); and / or, the partition (123) is disposed on the first side panel (126) and the second side panel (127); The interior space of the enclosure (12) is divided into two accommodating spaces by the partition (123) along the first direction (X) for the appropriate insertion of the battery cell (11).

8. The battery pack according to claim 7, characterized in that, The top side panel (125) includes a first segment and a second segment, which are spaced apart to form an opening (121) in the top side panel. The bottom side plate (124) is provided with a through hole at the position opposite to the heat dissipation duct (13) to form an opening (121) in the bottom side plate (124).

9. The battery pack according to claim 4, characterized in that, The distance between the lower surface of the bottom shell (4) and the bottom of the battery pack (1) is less than or equal to 60 mm; The height of the air inlet duct (3) is less than or equal to 40 mm.

10. The battery pack according to claim 6, characterized in that, The enclosure also includes a first mounting part (122), and the top side panel is provided with the first mounting part (122) on both sides of the air outlet pipe. The air outlet pipe also includes a second mounting part, and the air outlet pipe is provided with a second mounting part at a position opposite to each of the first mounting parts (122); Fasteners can be inserted between the first mounting part (122) and the second mounting part to press the bottom of the air outlet (2) tightly against the top of the battery pack (1).

11. A vehicle, characterized in that, The battery pack includes any one of claims 1 to 10.

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