Battery pack and vehicle

Abstract

The embodiment of the utility model provides a battery pack and a vehicle. 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, an air inlet channel is formed between the battery cell module and 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, 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 for feeding air into the battery cell module; the shell comprises a first side and a second side which are oppositely arranged in the first direction, the first side is used for feeding air into the gap, and the sectional area of the gap is gradually reduced in the direction from the first side to the second side so as to adjust the air pressure of the air inlet channel. And the air volume from the air inlet channel is adjusted through the gap with the gradually reduced cross section area, so that a relatively good air cooling effect is achieved on each battery cell, and the cooling balance is improved.

Description

Technical Field

[0001] This application belongs to the technical field of vehicles, and particularly relates to a battery pack and a vehicle. Background Art

[0002] The battery pack is used to provide electrical energy for the vehicle and is an important power source. The battery cells in the battery pack generate heat during operation, which is likely to affect the electrical performance of the battery pack. Therefore, thermal management of the battery pack plays an important role.

[0003] In the prior art, the battery pack generally includes a housing and a battery cell module disposed in the housing. An air inlet passage is provided between the battery cell module and the housing, and a fan is used to introduce gas into the air inlet passage to dissipate heat from the battery cell module.

[0004] However, the inventors found during the research on the prior art that the battery cell module generally includes multiple battery cells. During the operation of the battery pack, the battery cells at different positions generate different temperatures. It is difficult for the fan to introduce gas into the air inlet passage to achieve good heat dissipation for each battery cell, resulting in uneven heat dissipation and poor thermal management effect. Summary of the Utility Model

[0005] In view of the above problems, the present utility model is proposed to provide a battery pack and a vehicle that overcome the above problems or at least partially solve the above problems.

[0006] To solve the above technical problems, the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery pack, which includes: a housing, a battery cell module, and an air volume adjustment structure;

[0008] The battery cell module is disposed in the housing, and an air inlet passage is formed between the battery cell module and the bottom of the housing. The air volume adjustment structure is disposed in the air inlet passage, and the air volume adjustment structure is used to adjust the air volume transmitted from the air inlet passage to the battery cell module;

[0009] The air volume adjustment structure includes a wind pressure adjustment block and an air duct adjustment plate;

[0010] The wind pressure adjustment block is connected to the bottom of the housing, the air duct adjustment plate is disposed close to the battery cell module, and there is a gap between the air duct adjustment plate and the wind pressure adjustment block. The gap is used for air inlet to the battery cell module;

[0011] The housing includes a first side and a second side that are disposed away from each other in 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 wind pressure of the air inlet passage.

[0012] Optionally, the air duct regulating plate is provided with a plurality of openings for regulating the air volume transmitted from the gap to the battery cell module.

[0013] Optionally, the air duct regulating plate is horizontally arranged, and along the direction from the first side to the second side, the height of the air pressure regulating block gradually increases, so that the cross-sectional area of the gap gradually decreases.

[0014] Optionally, along the direction from the first side to the second side, the cross-sectional area of the opening of the air duct regulating plate gradually decreases to regulate the air volume transmitted from the gap to the battery cell module.

[0015] Optionally, the air inlet passage has an air inlet near the first side, and the air inlet is communicated with the air inlet passage for introducing air into the gap.

[0016] Optionally, the air inlet passage includes a first passage and a second passage arranged at intervals in the second direction, and the battery pack further includes an air outlet passage arranged between the first passage and the second passage;

[0017] wherein, the second direction is perpendicular to the first direction.

[0018] Optionally, the air outlet passage has an air outlet near the second side, and the air outlet is communicated with the air outlet passage for exhausting air from the air outlet passage.

[0019] Optionally, the battery pack further includes an adhesive layer connected between the air duct regulating plate and the housing to bond the air duct regulating plate to the housing.

[0020] Optionally, the air duct regulating plate is detachably connected to the side wall of the housing.

[0021] In a second aspect, an embodiment of the present application provides a vehicle, and the vehicle includes the battery pack described above.

[0022] In an embodiment of the present application, the battery pack includes: a housing, a battery cell module, and an air volume adjustment structure; the battery cell module is disposed in the housing, and an air inlet channel is formed between the battery cell module and the bottom of the housing. The air volume adjustment structure is disposed in the air inlet channel and is configured to adjust the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjustment structure includes a wind pressure adjustment block and an air duct adjustment plate; the wind pressure adjustment block is connected to the bottom of the housing, the air duct adjustment plate is disposed close to the battery cell module, and there is a gap between the air duct adjustment plate and the wind pressure adjustment block, and the gap is used for air inlet to the battery cell module; the housing includes a first side and a second side that are disposed away from each other in a first direction, the first side is used for air inlet to the gap, and along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases to adjust the wind pressure of the air inlet channel. In this way, when heat is generated during the operation of the battery cell module, in the case where the temperatures of the battery cells at different positions are different, the air volume adjustment structure can adjust the gap between the air duct adjustment plate and the wind pressure adjustment block. Since the cross-sectional area of the gap gradually decreases along the direction from the first side to the second side, when cooling air is introduced into the gap, the wind pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases. Therefore, the wind pressure of the air inlet channel is adjusted, so as to adjust the air volume delivered from the air inlet channel to each battery cell, so that 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 where the battery cell with a higher temperature is located, the air volume adjustment structure can be made to increase the gap between the air duct adjustment plate and the wind pressure adjustment block to increase the air volume delivered from the air inlet channel to it; for the position where the battery cell with a lower temperature is located, the air volume adjustment structure can be made to decrease the gap between the air duct adjustment plate and the wind pressure adjustment block to decrease the air volume delivered from the air inlet channel to it. Thus, a good air cooling effect is achieved for each battery cell with different temperatures, a relatively balanced heat dissipation and temperature reduction effect is achieved for the battery cell module, and the thermal management effect of the battery pack is improved.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is one of the schematic structural diagrams of a battery pack according to an embodiment of the present application;

[0026] Figure 2 It is the second structural schematic diagram of a battery pack according to an embodiment of the present application;

[0027] Figure 3 It is an exploded view of a battery pack according to an embodiment of the present application;

[0028] Figure 4 It is the first cross-sectional structural schematic diagram of a battery pack according to an embodiment of the present application;

[0029] Figure 5 It is the structural schematic diagram of an air duct regulating plate of a battery pack according to an embodiment of the present application;

[0030] Figure 6 It is the second cross-sectional structural schematic diagram of a battery pack according to an embodiment of the present application;

[0031] Figure 7 It is the bottom view of a battery pack according to an embodiment of the present application.

[0032] Reference numerals: 10 - housing; 20 - battery cell module; 30 - air inlet channel; 41 - air pressure regulating block; 42 - air duct regulating plate; 43 - opening; 11 - first side; 12 - second side; 15 - gap; 13 - air inlet; 31 - first channel; 32 - second channel; 33 - air outlet channel; 14 - air outlet; X - first direction; Y - second direction. Detailed implementation manners

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0034] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means that the associated objects before and after are in an "or" relationship.

[0035] In the description of the present utility model, 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", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Referring to Figures 1 to 7 , a schematic structural diagram of a battery pack according to an embodiment of the present application is shown, wherein, Figure 4 and Figure 6 the arrows in represent the transmission direction of the cooling air, and the battery pack may specifically include: a housing 10, a battery cell module 20, and an air volume adjustment structure;

[0038] The battery cell module 20 is disposed in the housing 10, and an air inlet passage 30 is formed between the battery cell module 20 and the bottom of the housing 10. The air volume adjustment structure is disposed in the air inlet passage 30, and the air volume adjustment structure is used to adjust the air volume transmitted from the air inlet passage 30 to the battery cell module 20.

[0039] The air volume adjustment structure includes a wind pressure adjustment block 41 and an air duct adjustment plate 42; the wind pressure adjustment block 41 is connected to the bottom of the housing 10, the air duct adjustment plate 42 is disposed close to the battery cell module 20, and a gap 15 is formed between the air duct adjustment plate 42 and the wind pressure adjustment block 41. The gap 15 is used for air inlet to the battery cell module 20.

[0040] The housing 10 includes a first side 11 and a second side 12 that are disposed away from each other along the 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 to adjust the wind pressure of the air inlet passage 30.

[0041] It should be noted that in the present utility model, "gradually decreasing" refers to a trend change, excluding the case where the cross-sectional areas of two adjacent points are equal, that is, there is a size relationship between the cross-sectional areas of any two adjacent points (the cross-sectional area of one must be greater than that of the other), and there is no equal relationship.

[0042] In the embodiment of the present application, when heat is generated during the operation of the battery cell module 20 and the temperatures of the battery cells at different positions are different, the air volume adjustment structure can adjust the air volume delivered from the air inlet channel 30 to each battery cell. Moreover, the air inlet channel 30 is formed through the gap 15 between the air duct adjustment plate 42 and the air pressure adjustment block 41 to introduce cooling air into the battery cell module 20. Exemplarily, for the position where the battery cell generates a higher temperature, the air volume adjustment structure can make the air volume delivered from the air inlet channel 30 to it larger through the gap 15 between the air duct adjustment plate 42 and the air pressure adjustment block 41; for the position where the battery cell generates a lower temperature, the air volume adjustment structure can make the air volume delivered from the air inlet channel 30 to it smaller through the gap 15 between the air duct adjustment plate 42 and the air pressure adjustment block 41. Thus, a good air cooling effect is achieved for each battery cell with different temperatures, and a more balanced heat dissipation and temperature reduction effect is realized for the battery cell module 20, improving the thermal management effect of the battery pack.

[0043] Specifically, cooling air is introduced into the air inlet channel 30 formed by the gap 15 through the first side 11 of the housing 10. Since the cross-sectional area of the gap 15 gradually decreases along the direction from the first side 11 to the second side 12, when the cooling air is introduced into the gap 15, the air pressure of the cooling air in the gap 15 gradually increases along the direction from the first side 11 to the second side 12, that is, the flow velocity of the cooling air gradually increases. Thus, the flow rate of the cooling air in the gap 15 is relatively balanced along the direction from the first side 11 to the second side 12, making the cooling effect of the battery cell module 20 more uniform.

[0044] Exemplarily, in the embodiment of the present application, the cross-sectional area of the gap 15 can change gradually in a continuous manner or in a non - continuous manner. The specific change mode of the cross-sectional area of the gap 15 in the embodiment of the present application may not be limited.

[0045] Exemplarily, in the embodiment of the present application, the air pressure adjustment block 41 and the housing 10 are of an integrally formed structure, so that the connection strength between the air pressure adjustment block 41 and the housing 10 of the battery pack is relatively high, and material loss and manufacturing processes are reduced. In addition, the air pressure adjustment block 41 and the housing 10 can also be of a split structure, which is convenient for separate processing and manufacturing, reducing the processing difficulty. The specific forming mode of the air pressure adjustment block 41 and the housing 10 in the embodiment of the present application may not be limited.

[0046] In an embodiment of the present application, optionally, the air duct adjusting plate 42 is detachably connected to the side wall of the housing 10. In this way, it is convenient to install the air duct adjusting plate 42, and it is also convenient to replace the air duct adjusting plate 42 with different ones for different working modes of the battery cell module 20, so that the opening 43 mode of the air duct adjusting plate 42 has a better cooling and heat dissipation effect on the battery cell module 20.

[0047] Exemplarily, in an embodiment of the present application, a clamping platform may be provided on the side wall of the housing 10, and the air duct adjusting plate 42 is clamped to the clamping platform to achieve the detachable connection between the air duct adjusting plate 42 and the housing 10. In addition, the air duct adjusting plate 42 may also be connected to the side wall of the housing 10 through fasteners such as screws, bolts or bolts, etc. The specific connection manner between the air duct adjusting plate 42 and the housing 10 in the embodiment of the present application may not be limited.

[0048] Through simulation experiments, it is obtained that by using the air volume adjusting structure composed of the air pressure adjusting block 41 and the air duct adjusting plate 42 in the embodiment of the present application to test the temperature field distribution of the battery cell module 20 in the battery pack, the temperature of the battery cell with the highest temperature in the battery cell module 20 is 46.8 °C, the temperature of the battery cell with the lowest temperature is 42.2 °C, and the temperature difference is 4.6 °C, meeting the requirement in the industry that the temperature difference of the battery cell module 20 is less than 5 °C. That is, the air volume adjusting structure composed of the air pressure adjusting block 41 and the air duct adjusting plate 42 in the embodiment of the present application has a good air cooling effect on each battery cell with different temperatures generated in the battery cell module 20, realizes a relatively balanced heat dissipation and temperature reduction effect on the battery cell module 20, and improves the thermal management effect on the battery pack.

[0049] Specifically, in an embodiment of the present application, a blower or a fan may be used to supply cooling air to the air inlet passage 30. The blower or the fan may be arranged outside the housing 10 of the battery pack and placed close to the air inlet passage 30 to provide a stable source of cooling air.

[0050] Exemplarily, in an embodiment of the present application, the air volume adjusting structure may adjust the air volume through an adjusting plate with adjustable opening size. When the opening is enlarged, the air volume conveyed from the air inlet passage 30 to the battery cells can be adjusted to be larger, and when the opening is reduced, the air volume conveyed from the air inlet passage 30 to the battery cells can be adjusted to be smaller. The air volume adjusting structure may also adjust the air volume through structures such as a slope, so that along the direction in which the height of the slope gradually increases, the wind force input from the air inlet passage 30 gradually increases, so that the wind forces received by each battery cell of the battery cell module 20 are relatively balanced.

[0051] Optionally, in the embodiments of the present application, the air duct regulating plate 42 is provided with a plurality of openings 43 for regulating the air volume transmitted from the gap 15 to the battery cell module 20. Specifically, the air duct regulating plate 42 is disposed near the bottom of the battery cell module 20, and the air volume transmitted from the gap 15 to the battery cell module 20 is regulated through the openings 43 on the air duct regulating plate 42. For the battery cells with higher generated temperature, the size of the openings 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 a better heat dissipation and cooling effect on the battery cells with higher temperature; for the battery cells with lower generated temperature, the size of the openings 43 can be set smaller to decrease the air volume transmitted from the gap 15 to the battery cell module 20, so as to achieve a better heat dissipation and cooling effect on the battery cells with lower temperature, avoid energy consumption waste, and improve the thermal management effect of the battery pack.

[0052] Optionally, in the embodiments of the present application, the air duct regulating plate 42 is horizontally disposed, and along the direction from the first side 11 to the second side 12, the height of the air pressure regulating block 41 gradually increases, so that the cross-sectional area of the gap 15 gradually decreases. Since the air duct regulating plate 42 is horizontally disposed and the height of the air pressure regulating block 41 gradually increases along the direction from the first side 11 to the second side 12, the cross-sectional area of the gap 15 between the air duct regulating plate 42 and the air pressure regulating block 41 gradually decreases along the direction from the first side 11 to the second side 12, thereby making the flow rate of the cooling air in the gap 15 more balanced along the direction from the first side 11 to the second side 12.

[0053] Exemplarily, in the embodiments of the present application, the height of the air pressure regulating block 41 can be gradually decreased in a continuously changing manner in sequence, or can be gradually decreased in a non-continuous changing manner. The embodiments of the present application may not limit the specific changing manner of the height of the air pressure regulating block 41.

[0054] Optionally, in the embodiments of the present application, along the direction from the first side 11 to the second side 12, the cross-sectional area of the opening 43 of the air duct regulating plate 42 gradually decreases to regulate the air volume transmitted from the gap 15 to the battery cell module 20. Corresponding to the fact that the height of the air pressure regulating block 41 gradually increases along the direction from the first side 11 to the second side 12, it is set that the cross-sectional area of the opening 43 of the air duct regulating plate 42 gradually decreases along the direction from the first side 11 to the second side 12, so that the air pressure regulating block 41 and the air duct regulating plate 42 cooperate with each other to achieve a better cooling balance effect on the battery cell module 20.

[0055] Specifically, in the embodiment of the present application, at a position close to the first side 11, the wind pressure in the gap 15 is relatively small, and the cross-sectional area of the opening 43 on the corresponding wind pressure regulating plate is relatively large, so that the air volume introduced into the battery cell module 20 from the gap 15 is relatively large, which has a good cooling effect on the battery cells close to the first side 11. Along the direction from the first side 11 to the second side 12, the wind pressure in the gap 15 gradually increases. Therefore, at a position close to the second side 12, the wind pressure in the gap 15 is relatively large, and the cross-sectional area of the opening 43 on the corresponding wind pressure regulating plate is relatively small, so that the wind force introduced into the battery cell module 20 from the gap 15 is relatively large, which also has a good cooling effect on the battery cells close to the second side 12. Thus, a relatively balanced and stable heat dissipation effect on the battery cells at multiple different positions in the battery cell module 20 is achieved, and the cooling uniformity of the battery pack is improved.

[0056] In the embodiment of the present application, by way of example, the number of the openings 43 can be 1, or 2, or 3, etc., and can be set according to the size of the battery cell module 20 and the like according to actual needs, and the embodiment of the present application may not make any limitation thereto. The shape of the opening 43 can be triangular or trapezoidal, etc., and the embodiment of the present application may not make any limitation to the specific shape of the opening 43.

[0057] By way of example, in the embodiment of the present application, the cross-sectional area of the opening 43 of the air duct regulating plate 42 can be gradually decreased in a continuously changing manner or in a non-continuously changing manner, and the embodiment of the present application may not make any limitation to the specific changing manner of the cross-sectional area of the opening 43 of the air duct regulating plate 42.

[0058] Optionally, in the embodiment of the present application, the air inlet 13 is provided at a position of the air inlet channel 30 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 introducing air into the gap 15. Specifically, the air inlet 13 can be formed by opening a hole on the side wall of the first side 11 of the housing 10, and cooling air is introduced into the air inlet channel 30 formed by the gap 15 through the air inlet 13, and the structure is simple and easy to implement. By way of example, the number of the air inlets 13 can be 1, 2, or 3, etc., and can be set according to actual needs, and the embodiment of the present application may not make any limitation to the specific number of the air inlets 13. The shape of the air inlet 13 can be rectangular, square, or circular, etc., and the embodiment of the present application may not make any limitation to the specific shape of the air inlet 13.

[0059] In some alternative embodiments of the present application, the air inlet passage 30 includes a first passage 31 and a second passage 32 spaced apart along the second direction Y. The battery pack further includes an air outlet passage 33 disposed between the first passage 31; wherein, the second direction Y is perpendicular to the first direction X. That is, the first passage 31 and the second passage 32 are respectively located on both sides of the battery cell module 20, and the air outlet passage 33 is located at the middle position of the battery cell module 20. Cooling air is input into the battery cell module 20 from both sides through the first passage 31 and the second passage 32, so that the cooling air cools the large surfaces on both sides of the battery cell module 20, increasing the contact area between the cooling air and the battery cell module 20 and improving the heat dissipation effect. Then, the cooling air is discharged from the air outlet passage 33 located at the middle position, as Figure 4 shown, forming a cooling cycle with air inlet from both sides and air outlet in the middle.

[0060] Exemplarily, in the embodiments of the present application, the number of the air outlet passages 33 can be 1, or 2, 3, etc., and can be set according to actual needs. As Figure 2 and Figure 6 show, the case where the number of the air outlet passages 33 is 2 is shown. In practical applications, the specific number of the air outlet passages 33 provided in the embodiments of the present application can be not limited.

[0061] Optionally, in the embodiments of the present application, a groove is provided at the bottom of the housing 10. The groove is recessed away from the battery cell module 20, and the air outlet passage 33 is provided in the groove. In this way, by providing the air outlet passage 33 through the groove, interference between the air outlet passage 33 and the air inlet passage 30 is avoided, which affects the normal circulation of the cooling air. Correspondingly, the number of the grooves can be 1, or 2, 3, etc., and can be set according to actual needs. The specific number of the grooves provided in the embodiments of the present application can be not limited.

[0062] In the embodiments of the present application, optionally, an air outlet 14 is provided at a position of the air outlet passage 33 close to the second side 12. The air outlet 14 is communicated with the air outlet passage 33, and the air outlet 14 is used for exhausting the air from the air outlet passage 33. Specifically, the air outlet 14 can be opened on the side wall of the second side 12 of the housing 10, and the cooled air is exhausted from the air inlet passage 30 formed by the gap 15 through the air outlet 14, which is simple in structure and easy to implement. The air outlet 14 and the air inlet 13 are respectively provided on both sides of the housing 10, which also avoids interference and mutual influence between the air inlet 13 and the air outlet 14, and improves the circulation stability of the cooling air in the battery pack.

[0063] Exemplarily, the number of the air inlets 13 can be 1, 2, 3, etc., which can be set according to actual needs. The embodiments of the present application do not limit the specific number of the air inlets 13. The shape of the air inlets 13 can be rectangular, square, circular, etc. The embodiments of the present application also do not limit the specific shape of the air inlets 13.

[0064] Optionally, the battery pack further includes an adhesive layer, which is connected between the air duct adjusting plate 42 and the housing 10 to bond the air duct adjusting plate 42 to the housing 10. In this way, the connection reliability and stability between the air duct adjusting plate 42 and the housing 10 are improved through the adhesive layer, and the structure is simple. There is no need to set other connecting parts, which can reduce the structural parts in the battery pack and simplify the assembly process. Exemplarily, the adhesive layer can be realized by using foam or structural adhesive, etc. The embodiments of the present application do not limit the specific type of the adhesive layer.

[0065] In summary, the battery pack described in the embodiments of the present application can at least have the following advantages:

[0066] In an embodiment of the present application, the battery pack includes: a housing, a battery cell module, and an air volume adjustment structure; the battery cell module is disposed in the housing, and an air inlet channel is formed between the battery cell module and the bottom of the housing, the air volume adjustment structure is disposed in the air inlet channel, and the air volume adjustment structure is used to adjust the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjustment structure includes a wind pressure adjustment block and an air duct adjustment plate; the wind pressure adjustment block is connected to the bottom of the housing, the air duct adjustment plate is disposed close to the battery cell module, and there is a gap between the air duct adjustment plate and the wind pressure adjustment block, and the gap is used for air inlet to the battery cell module; the housing includes a first side and a second side disposed away from each other in a first direction, the first side is used for air inlet to the gap, and along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases to adjust the wind pressure of the air inlet channel. In this way, when heat is generated during the operation of the battery cell module, in the case where the temperatures of the battery cells at different positions are different, the air volume adjustment structure can adjust the gap between the air duct adjustment plate and the wind pressure adjustment block. Since the cross-sectional area of the gap gradually decreases along the direction from the first side to the second side, when cooling air is introduced into the gap, the wind pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases. Therefore, the wind pressure of the air inlet channel is adjusted, so as to adjust the air volume conveyed from the air inlet channel to each battery cell, so that 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 where the battery cell with a higher temperature is generated, the air volume adjustment structure can be made to increase the gap between the air duct adjustment plate and the wind pressure adjustment block to increase the air volume conveyed from the air inlet channel to it; for the position where the battery cell with a lower temperature is generated, the air volume adjustment structure can be made to decrease the gap between the air duct adjustment plate and the wind pressure adjustment block to decrease the air volume conveyed from the air inlet channel to it. Thus, a good air cooling effect is achieved for each battery cell with different temperatures, a relatively balanced heat dissipation and temperature reduction effect is realized for the battery cell module, and the thermal management effect of the battery pack is improved.

[0067] An embodiment of the present application provides a vehicle, and the vehicle includes the battery pack described above. The battery pack provides a relatively stable and reliable power source for the vehicle.

[0068] For example, the vehicle may include a small car, a medium-sized vehicle, a sedan, a truck, a trailer, a CDV (Car Derived Van, a van based on a sedan platform), an MPV (multi-Purpose Vehicles), an SUV (Sport Utility Vehicles), etc. The specific types of the vehicle in the embodiments of the present application may not be limited.

[0069] The vehicle described in the embodiments of the present application may at least have the following advantages:

[0070] In the embodiments of the present application, the vehicle includes the battery pack described above. The battery pack includes: a housing, a battery cell module, and an air volume adjustment structure; the battery cell module is disposed in the housing, and an air inlet channel is formed between the battery cell module and the bottom of the housing. The air volume adjustment structure is disposed in the air inlet channel, and the air volume adjustment structure is used to adjust the air volume transmitted from the air inlet channel to the battery cell module; the air volume adjustment structure includes a wind pressure adjustment block and an air duct adjustment plate; the wind pressure adjustment block is connected to the bottom of the housing, the air duct adjustment plate is disposed close to the battery cell module, and there is a gap between the air duct adjustment plate and the wind pressure adjustment block, and the gap is used for air intake to the battery cell module; the housing includes a first side and a second side disposed away from each other in a first direction, the first side is used for air intake to the gap, and along the direction from the first side to the second side, the cross-sectional area of the gap gradually decreases to adjust the wind pressure of the air inlet channel. In this way, when heat is generated during the operation of the battery cell module, in the case where the temperatures generated by the battery cells at different positions are different, the air volume adjustment structure can adjust the gap between the air duct adjustment plate and the wind pressure adjustment block. Since the cross-sectional area of the gap gradually decreases along the direction from the first side to the second side, when cooling air is introduced into the gap, the wind pressure of the cooling air in the gap gradually increases, that is, the flow rate of the cooling air gradually increases. Therefore, the wind pressure of the air inlet channel is adjusted, so as to adjust the air volume delivered from the air inlet channel to each battery cell, so that 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. Exemplarily, for the position where the battery cell with a higher temperature is generated, the air volume adjustment structure can be made to adjust the gap between the air duct adjustment plate and the wind pressure adjustment block to increase the air volume delivered from the air inlet channel to it; for the position where the battery cell with a lower temperature is generated, the air volume adjustment structure can be made to adjust the gap between the air duct adjustment plate and the wind pressure adjustment block to decrease the air volume delivered from the air inlet channel to it. Thus, a good air cooling effect is achieved for each battery cell with different generated temperatures, a relatively balanced heat dissipation and temperature reduction effect is achieved for the battery cell module, and the thermal management effect of the battery pack is improved.

[0071] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: The battery pack includes: a shell, a battery module and an air volume adjustment structure; The battery cell module is arranged in the shell, and an air inlet channel is formed between the battery cell module and the bottom of the shell. The air volume regulating structure is arranged in the air inlet channel, and the air volume regulating structure is used to regulate the air volume transmitted from the air inlet channel to the battery cell module. The air volume adjustment structure includes an air pressure adjustment block and an air duct adjustment plate; The wind pressure regulating block is connected to the bottom of the shell, the air duct regulating plate is arranged close to the battery module, and there is a gap between the air duct regulating plate and the wind pressure regulating block, and the gap is used to let air into the battery module; The shell includes a first side and a second side arranged in opposite directions along a first direction, the first side is used to let air into the gap, and the cross-sectional area of ​​the gap gradually decreases along the direction from the first side to the second side to adjust the wind pressure of the air inlet channel.

2. The battery pack according to claim 1, characterized in that: The air duct adjustment plate is provided with a plurality of openings, and the openings are used to adjust the air volume transmitted from the gap to the battery core module.

3. The battery pack according to claim 1, characterized in that: The air duct adjustment plate is arranged horizontally, and the height of the air pressure adjustment block gradually increases from the first side to the second side, so that the cross-sectional area of ​​the gap gradually decreases.

4. The battery pack according to claim 2, characterized in that: Along the direction from the first side to the second side, the cross-sectional area of ​​the opening of the air duct adjustment plate gradually decreases to adjust the air volume transmitted from the gap to the battery core module.

5. The battery pack according to claim 1, characterized in that: The air inlet channel has an air inlet at a position close to the first side, the air inlet is communicated with the air inlet channel, and the air inlet is used to let air into the gap.

6. The battery pack according to claim 1, characterized in that: The air inlet channel includes a first channel and a second channel arranged at intervals along a second direction, and the battery pack further includes an air outlet channel, and the air outlet channel is arranged between the first channel and the second channel; The second direction is perpendicular to the first direction.

7. The battery pack according to claim 6, characterized in that: The air outlet channel has an air outlet at a position close to the second side, the air outlet is communicated with the air outlet channel, and the air outlet is used to exhaust air from the air outlet channel.

8. The battery pack according to claim 1, characterized in that: The battery pack further includes an adhesive layer connected between the air duct adjustment plate and the shell to adhere the air duct adjustment plate to the shell.

9. The battery pack according to claim 1, characterized in that: The air duct adjustment plate is detachably connected to the side wall of the shell.

10. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1 to 9.

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