Battery pack and vehicle

Abstract

A battery pack and a vehicle. The battery pack comprises a case (10), a battery cell module (20), and air volume adjustment structures. The battery cell module (20) is arranged in the case (10), and air inlet channels (30) are formed between the battery cell module (20) and the bottom of the case (10). The air volume adjustment structures are arranged in the air inlet channels (30), and are used for adjusting the air volume transferred from the air inlet channels (30) to the battery cell module (20). Each air volume adjustment structure comprises an air pressure adjustment block (41) and an air channel adjustment plate (42). The air pressure adjustment block (41) is connected to the bottom of the case (10); the air channel adjustment plate (42) is arranged close to the battery cell module (20); a gap (15) is provided between the air channel adjustment plate (42) and the air pressure adjustment block (41); and the gap (15) is used for introducing air to the battery cell module (20). The case (10) comprises a first side (11) and a second side (12) arranged away from each other in a first direction; the first side (11) is used for introducing air to the gap (15); and in a direction from the first side (11) to the second side (12), the cross-sectional area of the gap (15) gradually decreases, so as to adjust the air volume of the air inlet channel (30). The air inlet channels (30) in which the air volume can be adjusted can improve the air cooling effect on battery cells, thereby improving the cooling uniformity of the battery cell module (20).

Description

Battery pack and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202421712785.0, filed on July 18, 2024, and entitled "Battery pack and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of vehicles, and particularly relates to a battery pack and a vehicle. BACKGROUND

[0003] The battery pack is used to provide electric energy for a vehicle and is an important power source. The cell module of the battery pack generates heat during the working process, which easily affects the electrical performance of the battery pack. Therefore, thermal management of the battery pack plays a relatively important role.

[0004] In the prior art, the battery pack usually includes a shell and a cell module arranged in the shell. An air inlet channel is arranged between the cell module and the shell. A fan is used to introduce air into the air inlet channel to cool the cell module.

[0005] However, the inventors have found in the process of studying the prior art that the cell module usually includes a plurality of cells. During the working process of the battery pack, the cells at different positions generate different temperatures. It is difficult for the fan to introduce air into the air inlet channel to achieve good cooling of all the cells, resulting in uneven cooling and poor thermal management effect.

[0006] CONTENT

[0007] In view of the above problems, the present application is proposed to provide a battery pack and a vehicle which overcome the above problems or at least partially solve the above problems.

[0008] To solve the above technical problems, the present application is implemented as follows:

[0009] In a first aspect, the embodiments of the present application propose a battery pack, which includes a shell, a cell module and an air volume adjusting structure.

[0010] The cell module is arranged in the shell and forms an air inlet channel with the bottom of the shell. The air volume adjusting structure is arranged in the air inlet channel and is used to adjust the air volume transmitted from the air inlet channel to the cell module.

[0011] The air volume adjusting structure includes an air pressure adjusting block and an air duct adjusting plate.

[0012] The air pressure adjusting block is connected to the bottom of the shell, the air duct adjusting plate is arranged close to the battery cell module, and a gap is formed between the air duct adjusting plate and the air pressure adjusting block, which is used for air inlet to the battery cell module.

[0013] The shell comprises a first side and a second side arranged away from each other along a first direction, the first side is used for air inlet to the gap, and the cross-sectional area of the gap gradually decreases in the direction from the first side to the second side, so as to adjust the air pressure of the air inlet channel.

[0014] Optionally, the air duct adjusting plate is provided with a plurality of openings, and the openings are used for adjusting the air volume transmitted from the gap to the battery cell module.

[0015] Optionally, the air duct adjusting plate is arranged horizontally, and the height of the air pressure adjusting block gradually increases in the direction from the first side to the second side, so as to gradually decrease the cross-sectional area of the gap.

[0016] Optionally, the cross-sectional area of the opening of the air duct adjusting plate gradually decreases in the direction from the first side to the second side, so as to adjust the air volume transmitted from the gap to the battery cell module.

[0017] Optionally, the air pressure adjusting block and the shell are integrally formed.

[0018] Optionally, the air inlet channel formed by the first side of the shell to the gap is used for introducing cooling air, and the air pressure of the cooling air gradually increases in the direction from the first side to the second side in the gap.

[0019] Optionally, the air inlet channel is provided with an air inlet close to the first side, the air inlet is communicated with the air inlet channel, and the air inlet is used for air inlet to the gap.

[0020] Optionally, the air inlet channel comprises a first channel and a second channel arranged at intervals along a second direction, and the battery pack further comprises an air outlet channel arranged between the first channel and the second channel.

[0021] Wherein, the second direction is perpendicular to the first direction.

[0022] Optionally, the air outlet channel is provided with an air outlet close to the second side, the air outlet is communicated with the air outlet channel, and the air outlet is used for air exhaust of the air outlet channel.

[0023] Optionally, the bottom of the shell is provided with a groove recessed away from the battery cell module, and the groove is provided with the air outlet channel.

[0024] Optionally, the battery pack further comprises an adhesive layer connected between the air duct adjusting plate and the shell to adhere the air duct adjusting plate to the shell.

[0025] Optionally, the air duct adjusting plate is detachably connected to the side wall of the shell.

[0026] Optionally, the side wall of the shell is provided with a clamping platform, and the air duct adjusting plate is clamped to the clamping platform to realize the detachable connection between the air duct adjusting plate and the shell.

[0027] In a second aspect, the embodiments of the present application provide a vehicle, which comprises the battery pack.

[0028] In the embodiment of the present application, the battery pack comprises a shell, a battery cell module and an air volume adjusting structure; the battery cell module is arranged in the shell and forms an air inlet channel with the bottom of the shell, and the air volume adjusting structure is arranged in the air inlet channel and is used for adjusting the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjusting structure comprises an air pressure adjusting block and an air duct adjusting plate; the air pressure adjusting block is connected to the bottom of the shell, and the air duct adjusting plate is arranged close to the battery cell module; the air duct adjusting plate and the air pressure adjusting block have a gap therebetween, and the gap is used for air inlet to the battery cell module; the shell comprises a first side and a second side arranged away from each other along a first direction; the first side is used for air inlet to the gap; along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases to adjust the air pressure of the air inlet channel. In this way, in the case that the battery cell module generates heat during operation, the temperature of the battery cells at different positions is different, the air volume adjusting structure can adjust the gap between the air duct adjusting plate and the air pressure adjusting block, since along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases, when the cooling air is introduced into the gap, the air pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases, thereby realizing the air pressure adjustment of the air inlet channel, adjusting the air volume transmitted from the air inlet channel to each battery cell, making the flow of the cooling air in the gap along the direction from the first side to the second side more balanced, and making the cooling effect of the battery cell module more uniform. For example, for the position of the battery cell generating higher temperature, the air volume adjusting structure can be adjusted to increase the gap between the air duct adjusting plate and the air pressure adjusting block to increase the air volume transmitted from the air inlet channel thereto; for the position of the battery cell generating lower temperature, the air volume adjusting structure can be adjusted to decrease the gap between the air duct adjusting plate and the air pressure adjusting block to decrease the air volume transmitted from the air inlet channel thereto, thereby achieving better air cooling effect for each battery cell generating different temperature and achieving more balanced heat dissipation and cooling effect for the battery cell module, and improving the thermal management effect of the battery pack.

[0029] Additional aspects and advantages of the present application will be made apparent from the following description.

[0030] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a structural schematic diagram of a battery pack according to an embodiment of the present application;

[0032] Fig. 2 is a structural schematic diagram of a battery pack according to an embodiment of the present application;

[0033] Fig. 3 is an exploded view of a battery pack according to an embodiment of the present application;

[0034] Fig. 4 is a cross-sectional structural schematic diagram of a battery pack according to an embodiment of the present application;

[0035] Fig. 5 is a structural schematic diagram of a wind channel adjusting plate of a battery pack according to an embodiment of the present application;

[0036] Fig. 6 is a cross-sectional structural schematic diagram of a battery pack according to an embodiment of the present application;

[0037] Fig. 7 is a bottom view of a battery pack according to an embodiment of the present application.

[0038] Fig. 7 is a bottom view of a battery pack according to an embodiment of the present application. Specific Embodiments

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0040] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0041] The term "parallel" in the present application includes not only the case of absolute parallel, but also the case of approximate parallel as generally recognized in engineering, for example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is-1°-1°; at the same time, "perpendicular" also includes not only the case of absolute perpendicular, but also the case of approximate perpendicular as generally recognized in engineering, for example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is 89°-91°. The equal distance or equal angle includes not only the case of absolute equality, but also the case of approximate equality as generally recognized in engineering, that is, there can be a certain error, for example, the tolerance range is-1%-1%.

[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Referring to FIGS. 1-7, a structural schematic diagram of a battery pack according to an embodiment of the present application is shown, wherein the arrows in FIGS. 4 and 6 represent the transmission direction of cooling air, and the battery pack specifically can include a shell 10, a battery cell module 20 and an air volume adjusting structure;

[0045] The battery cell module 20 is arranged in the shell 10 and forms an air inlet channel 30 with the bottom of the shell 10, and the air volume adjusting structure is arranged in the air inlet channel 30, and the air volume adjusting structure is used to adjust the air volume transmitted from the air inlet channel 30 to the battery cell module 20;

[0046] The air volume adjusting structure comprises an air pressure adjusting block 41 and an air duct adjusting plate 42; the air pressure adjusting block 41 is connected to the bottom of the shell 10, and the air duct adjusting plate 42 is arranged close to the battery cell module 20; there is a gap 15 between the air duct adjusting plate 42 and the air pressure adjusting block 41, and the gap 15 is used for air inlet to the battery cell module 20.

[0047] The shell 10 comprises a first side 11 and a second side 12 arranged away from each other along a first direction X; the first side 11 is used for air inlet to the gap 15; along the direction from the first side 11 to the second side 12, the cross-sectional area of the gap 15 gradually decreases, so as to adjust the air pressure of the air inlet channel 30.

[0048] It should be noted that, in the present application, “gradually decreases” refers to a trend change, and does not include the case that the cross-sectional areas of two adjacent points are equal, i.e., the cross-sectional areas of any two adjacent points have a size relationship (the cross-sectional area of one point is definitely larger than that of the other point), and do not have an equal relationship.

[0049] In the embodiment of the present application, in the case that heat is generated during the operation of the battery cell module 20, the temperature generated by the battery cells at different positions is different, and the air volume adjusting structure can adjust the air volume delivered from the air inlet channel 30 to each battery cell. Furthermore, the air inlet channel 30 is formed by the gap 15 between the air duct adjusting plate 42 and the air pressure adjusting block 41, so as to introduce cooling air into the battery cell module 20. For example, for the position where the battery cell generating a higher temperature is located, the air volume adjusting structure can be adjusted through the gap 15 between the air duct adjusting plate 42 and the air pressure adjusting block 41, so as to increase the air volume delivered from the air inlet channel 30; for the position where the battery cell generating a lower temperature is located, the air volume adjusting structure can be adjusted through the gap 15 between the air duct adjusting plate 42 and the air pressure adjusting block 41, so as to decrease the air volume delivered from the air inlet channel 30. Thus, the cooling effect of each battery cell generating a different temperature is good, and the heat dissipation and cooling effect of the battery cell module 20 is more balanced, so as to improve the heat management effect of the battery pack.

[0050] Specifically, the cooling air is introduced into the air inlet channel 30 formed by the gap 15 of the first side 11 of the shell 10, and since the cross-sectional area of the gap 15 gradually decreases along the direction from the first side 11 to the second side 12, the air pressure of the cooling air gradually increases along the direction from the first side 11 to the second side 12 in the gap 15 when the cooling air is introduced into the gap 15, i.e., the flow rate of the cooling air gradually increases, so that the flow of the cooling air along the direction from the first side 11 to the second side 12 in the gap 15 is more balanced, and the cooling effect of the battery cell module 20 is more uniform.

[0051] For example, in the embodiment of the present application, the cross-sectional area of the gap 15 can gradually decrease in a continuous manner or in a non-continuous manner, and the specific change manner of the cross-sectional area of the gap 15 is not limited in the embodiment of the present application.

[0052] For example, in the embodiment of the present application, the wind pressure adjusting block 41 and the shell 10 are integrally formed, so that the connection strength between the wind pressure adjusting block 41 and the shell 10 of the battery pack is high, and material loss and manufacturing procedures are reduced. In addition, the wind pressure adjusting block 41 and the shell 10 can also be a split structure, which is convenient for separate processing and manufacturing, and reduces the processing difficulty. The specific forming manner of the wind pressure adjusting block 41 and the shell 10 is not limited in the embodiment of the present application.

[0053] In the embodiment of the present application, the air duct adjusting plate 42 is detachably connected to the side wall of the shell 10. In this way, the installation of the air duct adjusting plate 42 is facilitated, and different air duct adjusting plates 42 can be replaced for different working modes of the battery cell module 20, so that the opening 43 of the air duct adjusting plate 42 has a better cooling effect on the battery cell module 20.

[0054] For example, in the embodiment of the present application, the side wall of the shell 10 can be provided with a clamping table, and the air duct adjusting plate 42 is clamped on the clamping table to realize the detachable connection between the air duct adjusting plate 42 and the shell 10. In addition, the air duct adjusting plate 42 can also be connected to the side wall of the shell 10 through fasteners such as screws, bolts or the like. The specific connection manner between the air duct adjusting plate 42 and the shell 10 is not limited in the embodiment of the present application.

[0055] According to the simulation experiment, the temperature of the battery cell with the highest temperature in the battery cell module 20 is 46.8℃, the temperature of the battery cell with the lowest temperature is 42.2℃, and the temperature difference is 4.6℃, which meets the requirement that the temperature difference of the battery cell module 20 is less than 5℃ in the industry. That is, the air volume adjusting structure composed of the wind pressure adjusting block 41 and the air duct adjusting plate 42 has a good air cooling effect on each battery cell with different temperatures generated in the battery cell module 20, and realizes a more balanced heat dissipation effect on the battery cell module 20, thereby improving the thermal management effect on the battery pack.

[0056] Specifically, in the embodiment of the present application, a fan or a blower can be used to provide cooling air to the air inlet channel 30, and the fan or the blower can be arranged outside the shell 10 of the battery pack and placed close to the air inlet channel 30 to provide a stable source of cooling air.

[0057] For example, in the embodiment of the present application, the air volume adjusting structure can adjust the air volume by the adjusting plate with adjustable opening size. When the opening is enlarged, the air volume delivered from the air inlet channel 30 to the battery cell is increased. When the opening is reduced, the air volume delivered from the air inlet channel 30 to the battery cell is reduced. The air volume adjusting structure can also adjust the air volume by the slope structure, so that the air force input from the air inlet channel 30 gradually increases along the direction of gradually increasing height of the slope, thereby making the air force received by each battery cell of the battery cell module 20 more balanced.

[0058] Optionally, in the embodiment of the present application, the air duct adjusting plate 42 is provided with a plurality of openings 43 for adjusting the air volume transmitted from the gap 15 to the battery cell module 20. Specifically, the air duct adjusting plate 42 is arranged close to the bottom of the battery cell module 20, and the air volume transmitted from the gap 15 to the battery cell module 20 is adjusted through the openings 43 on the air duct adjusting plate 42. For the battery cell with higher temperature, the size of the opening 43 can be set larger to increase the air volume transmitted from the gap 15 to the battery cell module 20, so as to achieve better heat dissipation and cooling effect for the battery cell with higher temperature. For the battery cell with lower temperature, the size of the opening 43 can be set smaller to reduce the air volume transmitted from the gap 15 to the battery cell module 20, so as to achieve better heat dissipation and cooling effect for the battery cell with lower temperature, avoid energy waste, and improve the thermal management effect of the battery pack.

[0059] Optionally, in the embodiment of the present application, the air duct adjusting plate 42 is arranged horizontally, and the height of the air pressure adjusting block 41 gradually increases in the direction from the first side 11 to the second side 12, so as to gradually reduce the cross-sectional area of the gap 15. Since the air duct adjusting plate 42 is arranged horizontally, and the height of the air pressure adjusting block 41 gradually increases in the direction from the first side 11 to the second side 12, the cross-sectional area of the gap 15 between the air duct adjusting plate 42 and the air pressure adjusting block 41 gradually decreases in the direction from the first side 11 to the second side 12, thereby making the flow of cooling air in the gap 15 more balanced in the direction from the first side 11 to the second side 12.

[0060] For example, in the embodiment of the present application, the height of the air pressure adjusting block 41 can be gradually reduced in continuous or discontinuous manner, and the specific change mode of the height of the air pressure adjusting block 41 is not limited in the embodiment of the present application.

[0061] Optionally, in the embodiment of the present application, the cross-sectional area of the opening 43 of the air duct adjusting plate 42 gradually decreases in the direction from the first side 11 to the second side 12, so as to adjust the amount of air transmitted from the gap 15 to the battery cell module 20. Corresponding to the gradually increasing height of the air pressure adjusting block 41 in the direction from the first side 11 to the second side 12, the cross-sectional area of the opening 43 of the air duct adjusting plate 42 gradually decreases in the direction from the first side 11 to the second side 12, so that the air pressure adjusting block 41 and the air duct adjusting plate 42 cooperate with each other to achieve a better cooling balance effect on the battery cell module 20.

[0062] Specifically, in the embodiment of the present application, near the first side 11, the air pressure in the gap 15 is small, and the cross-sectional area of the opening 43 on the air pressure adjusting plate is large, so that the amount of air from the gap 15 into the battery cell module 20 is large, and the battery cell near the first side 11 has a good cooling effect. In the direction from the first side 11 to the second side 12, the air pressure in the gap 15 gradually increases, so that near the second side 12, the air pressure in the gap 15 is large, and the cross-sectional area of the opening 43 on the air pressure adjusting plate is small, so that the amount of air from the gap 15 into the battery cell module 20 is large, and the battery cell near the second side 12 also has a good cooling effect. Thus, a more balanced and stable heat dissipation effect is achieved on the battery cells at different positions in the battery cell module 20, and the cooling uniformity of the battery pack is improved.

[0063] In the embodiment of the present application, for example, the number of openings 43 can be 1, or 2 or 3, etc., which can be set according to the size of the battery cell module 20 and other actual needs, and the present application does not limit the number of openings 43.

[0064] For example, in the embodiment of the present application, the cross-sectional area of the opening 43 of the air duct adjusting plate 42 can be continuously and gradually reduced, or it can be gradually reduced in a non-continuous manner, and the present application does not limit the specific change mode of the cross-sectional area of the opening 43 of the air duct adjusting plate 42.

[0065] Optionally, in the embodiment of the present application, the air inlet channel 30 is provided with an air inlet 13 close to the first side 11, the air inlet 13 is communicated with the air inlet channel 30, and the air inlet 13 is used for air inlet to the gap 15. Specifically, the air inlet 13 can be formed on the side wall of the first side 11 of the shell 10, and the cooling air is introduced into the air inlet channel 30 formed by the gap 15 through the air inlet 13, which is simple in structure and easy to implement. For example, the number of air inlets 13 can be one, two, or three, etc., which can be set according to actual needs, and the specific number of air inlets 13 in the embodiment of the present application can not be limited. The shape of the air inlet 13 can be rectangular, square, or circular, etc., and the specific shape of the air inlet 13 in the embodiment of the present application can also not be limited.

[0066] In some optional embodiments of the present application, the air inlet channel 30 includes a first channel 31 and a second channel 32 spaced apart along a second direction Y, and the battery pack further includes an air outlet channel 33 arranged between the first channel 31 and the second channel 32; wherein the second direction Y is perpendicular to the first direction X. That is, the first channel 31 and the second channel 32 are respectively located on both sides of the battery cell module 20, and the air outlet channel 33 is located at the middle position of the battery cell module 20. The cooling air is input to the battery cell module 20 from both sides through the first channel 31 and the second channel 32, so that the cooling air cools and cools the large surface on both sides of the battery cell module 20, increases the contact area of the cooling air and the battery cell module 20, and improves the heat dissipation effect, and then the cooling air is discharged from the air outlet channel 33 located at the middle position, as shown in FIG. 4, forming a cooling cycle of air inlet on both sides and air outlet in the middle.

[0067] For example, in the embodiment of the present application, the number of air outlet channels 33 can be one, two, or three, etc., which can be set according to actual needs. As shown in FIGS. 2 and 6, the number of air outlet channels 33 is two, and the specific number of air outlet channels 33 in the embodiment of the present application can not be limited in actual application.

[0068] Optionally, in the embodiment of the present application, the bottom of the shell 10 is provided with a recess, the recess is recessed away from the battery cell module 20, and the recess is provided with the air outlet channel 33. In this way, the air outlet channel 33 is arranged through the recess, avoiding interference between the air outlet channel 33 and the air inlet channel 30, and affecting the normal circulation of the cooling air. Correspondingly, the number of recesses can be one, two, or three, etc., which can be set according to actual needs, and the specific number of recesses in the embodiment of the present application can not be limited.

[0069] In the embodiment of the present application, the air outlet 14 is arranged on the second side 12 of the shell 10, and the air outlet 14 is in communication with the air outlet channel 33. The air outlet 14 is used to exhaust the air from the air inlet channel 30 formed by the gap 15. Specifically, the air outlet 14 is arranged on the side wall of the second side 12 of the shell 10, and the air exhausted from the air inlet channel 30 through the air outlet 14 is the air cooled. The structure is simple and easy to implement. The air inlet 13 and the air outlet 14 are arranged on the two sides of the shell 10, respectively, which avoids the interference between the air inlet 13 and the air outlet 14 and improves the circulation stability of the cooling air in the battery pack.

[0070] For example, the number of air inlets 13 can be one, two, three or the like, which can be set according to actual needs. The specific number of air inlets 13 is not limited in the embodiment of the present application. The shape of the air inlet 13 can be rectangular, square or circular or the like, and the specific shape of the air inlet 13 is not limited in the embodiment of the present application.

[0071] Optionally, the battery pack further comprises an adhesive layer connected between the air duct adjusting plate 42 and the shell 10, so as to bond the air duct adjusting plate 42 to the shell 10. In this way, the connection reliability and stability between the air duct adjusting plate 42 and the shell 10 are improved through the adhesive layer, and the structure is simple, without the need to arrange other connecting members, which can reduce the structural members in the battery pack and simplify the assembly process. For example, the adhesive layer can be made of foam or structural glue to achieve relatively stable and reliable bonding, and the specific type of the adhesive layer is not limited in the embodiment of the present application.

[0072] In summary, the battery pack described in the embodiment of the present application can have at least the following advantages:

[0073] In the embodiment of the present application, the battery pack comprises a shell, a battery cell module and an air volume adjusting structure; the battery cell module is arranged in the shell and forms an air inlet channel with the bottom of the shell, and the air volume adjusting structure is arranged in the air inlet channel and is used to adjust the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjusting structure comprises an air pressure adjusting block and an air duct adjusting plate; the air pressure adjusting block is connected to the bottom of the shell, and the air duct adjusting plate is arranged close to the battery cell module; a gap is formed between the air duct adjusting plate and the air pressure adjusting block, and the gap is used to supply air to the battery cell module; the shell comprises a first side and a second side arranged away from each other along a first direction; the first side is used to supply air to the gap; along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases to adjust the air pressure of the air inlet channel. In this way, in the case that the battery cell module generates heat during operation, the temperature of the battery cells at different positions is different, the air volume adjusting structure can adjust the gap between the air duct adjusting plate and the air pressure adjusting block, and since the cross-sectional area of the gap gradually decreases along the direction from the first side to the second side, when the cooling air is supplied into the gap, the air pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases, so that the air pressure of the air inlet channel is adjusted, the air volume transmitted from the air inlet channel to each battery cell is adjusted, the flow rate of the cooling air in the gap along the direction from the first side to the second side is relatively balanced, and the cooling effect of the battery cell module is relatively uniform. For example, for the position of the battery cell generating higher temperature, the air volume adjusting structure can be adjusted to increase the gap between the air duct adjusting plate and the air pressure adjusting block to increase the air volume transmitted from the air inlet channel; for the position of the battery cell generating lower temperature, the air volume adjusting structure can be adjusted to decrease the gap between the air duct adjusting plate and the air pressure adjusting block to decrease the air volume transmitted from the air inlet channel, so that each battery cell generating different temperature has a good air cooling effect, the battery cell module has a relatively balanced heat dissipation and cooling effect, and the thermal management effect of the battery pack is improved.

[0074] The embodiment of the present application provides a vehicle, which comprises the battery pack. The battery pack provides a relatively stable and reliable power source for the vehicle.

[0075] For example, the vehicle can comprise a small car, a medium car, a three-door car, a truck, a trailer, a CDV (Car Derived Van), an MPV (multi-Purpose Vehicles), an SUV (Sport Utility Vehicles) and the like, and the specific type of the vehicle is not limited in the embodiment of the present application.

[0076] The vehicle described in the embodiments of the present application can at least have the following advantages:

[0077] In the embodiments of the present application, the vehicle comprises the battery pack, the battery pack comprises a shell, a battery cell module and an air volume adjusting structure; the battery cell module is arranged in the shell and forms an air inlet channel with the bottom of the shell, the air volume adjusting structure is arranged in the air inlet channel, and the air volume adjusting structure is used for adjusting the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjusting structure comprises an air pressure adjusting block and an air duct adjusting plate; the air pressure adjusting block is connected to the bottom of the shell, and the air duct adjusting plate is arranged close to the battery cell module; the air duct adjusting plate and the air pressure adjusting block have a gap therebetween, and the gap is used for air inlet to the battery cell module; the shell comprises a first side and a second side arranged away along a first direction, the first side is used for air inlet to the gap, and the cross-sectional area of the gap gradually decreases in the direction from the first side to the second side, so as to adjust the air pressure of the air inlet channel. In this way, in the case that heat is generated during the operation of the battery cell module, and the temperature of the battery cells at different positions is different, the air volume adjusting structure can adjust the gap between the air duct adjusting plate and the air pressure adjusting block, and since the cross-sectional area of the gap gradually decreases in the direction from the first side to the second side, when the cooling air is introduced into the gap, the air pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases, so as to adjust the air pressure of the air inlet channel, thereby adjusting the air volume transmitted from the air inlet channel to each battery cell, so that the flow of the cooling air in the gap in the direction from the first side to the second side is relatively balanced, and the cooling effect of the battery cell module is relatively uniform. For example, for the position of the battery cell generating higher temperature, the air volume adjusting structure can be adjusted to increase the gap between the air duct adjusting plate and the air pressure adjusting block, so as to increase the air volume transmitted from the air inlet channel; for the position of the battery cell generating lower temperature, the air volume adjusting structure can be adjusted to decrease the gap between the air duct adjusting plate and the air pressure adjusting block, so as to decrease the air volume transmitted from the air inlet channel, thereby achieving better air cooling effect for each battery cell generating different temperature, achieving relatively balanced heat dissipation and cooling effect for the battery cell module, and improving the thermal management effect of the battery pack.

[0078] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0079] While optional embodiments of the application have been described, those skilled in the art will recognize that many modifications and variations of the described implementations can be made without departing from the scope of the application. It is therefore intended that whatever is described in the appended claims should be interpreted as including all such modifications and variations.

[0080] Finally, it should be noted that, in the specification, relational terms such as first and second and the like can be used solely to distinguish one entity from another entity without necessarily implying any actual relationship or order between such entities. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process or method. An element proceeded by "comprises a", "comprising", or "comprises" does not, without more constraints, preclude the existence of additional identical elements in the process or method.

[0081] The above detailed description of the application has been presented for the purposes of clarity and understanding. It is not intended to be exhaustive or to limit the application to the precise form described. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A battery pack, wherein, The battery pack comprises a shell, a battery cell module and an air volume adjusting structure; The battery cell module is arranged in the shell and forms an air inlet channel with the bottom of the shell, and the air volume adjusting structure is arranged in the air inlet channel and used for adjusting the air volume transmitted from the air inlet channel to the battery cell module; The air volume adjusting structure comprises an air pressure adjusting block and an air duct adjusting plate; The air pressure adjusting block is connected to the bottom of the shell, and the air duct adjusting plate is arranged close to the battery cell module, and the air duct adjusting plate and the air pressure adjusting block have a gap therebetween for air inlet to the battery cell module; The shell comprises a first side and a second side arranged away from each other along a first direction, the first side is used for air inlet to the gap, and the cross-sectional area of the gap gradually decreases in the direction from the first side to the second side to adjust the air pressure of the air inlet channel.

2. The battery pack of claim 1, wherein, The air duct adjusting plate is provided with a plurality of openings for adjusting the air volume transmitted from the gap to the battery cell module.

3. The battery pack of claim 1, wherein, The air duct adjusting plate is arranged horizontally, and the height of the air pressure adjusting block gradually increases in the direction from the first side to the second side to make the cross-sectional area of the gap gradually decrease.

4. The battery pack of claim 2, wherein, In the direction from the first side to the second side, the cross-sectional area of the openings of the air duct adjusting plate gradually decreases to adjust the air volume transmitted from the gap to the battery cell module.

5. The battery pack of claim 1, wherein, The air pressure adjusting block and the shell are integrally formed.

6. The battery pack of claim 1, wherein, The air inlet channel formed by the first side of the shell to the gap is connected to cooling air, and the air pressure of the cooling air gradually increases in the direction from the first side to the second side in the gap.

7. The battery pack of claim 1, wherein, The air inlet channel is provided with an air inlet close to the first side, the air inlet is connected to the air inlet channel, and the air inlet is used for air inlet to the gap.

8. The battery pack of claim 1, wherein, The air inlet channel comprises a first channel and a second channel arranged away from each other along a second direction, and the battery pack further comprises an air outlet channel arranged between the first channel and the second channel; The second direction is perpendicular to the first direction.

9. The battery pack of claim 8, wherein, The air outlet channel is provided with an air outlet close to the second side, the air outlet is connected to the air outlet channel, and the air outlet is used for air outlet of the air outlet channel.

10. The battery pack of claim 8, wherein, The bottom of the shell is provided with a groove recessed away from the battery cell module, and the groove is provided with the air outlet channel.

11. The battery pack of claim 1, wherein, The battery pack further comprises an adhesive layer connected between the air duct adjusting plate and the shell to adhere the air duct adjusting plate to the shell.

12. The battery pack of claim 1, wherein, The air duct adjusting plate is detachably connected to the side wall of the shell.

13. The battery pack of claim 12, wherein, The side wall of the shell is provided with a clamping table, and the air duct adjusting plate is clamped to the clamping table to realize the detachable connection between the air duct adjusting plate and the shell.

14. A vehicle, wherein, The vehicle comprises the battery pack of any one of claims 1-13.

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