Air-cooled battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses an air-cooled battery pack which comprises a box shell, a fan, a first air guide channel and a second air guide channel, and the first air guide channel extends in the first direction of the box shell; the second air guide channel extends in the second direction of the box shell, the second direction and the first direction intersect and are both perpendicular to the height direction of the box shell, and the second air guide channel is used for communicating with the first air guide channel and the first air opening. When the fan works, external airflow enters from the first air opening, passes through the second air guide channel and then flows into the first air guide channel, due to the fact that the first end of the first air guide channel is in sealing fit with the peripheral side of the second air opening, and the second end of the first air guide channel is arranged in a closed mode, it is guaranteed that the airflow in the first air guide channel can only be exhausted from the fan at the second air opening. Therefore, the situation that the air flow cannot be discharged out of the box shell due to the short circuit of the internal air is avoided, the local temperature in the box shell is prevented from being too high, and the air cooling efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to an air-cooled battery pack. Background Art

[0002] In the related art, an air-cooled battery pack includes a case, battery cells, and a fan. Among them, multiple battery cells are arranged in the case. The case has an air inlet and an air outlet, and the fan is installed in the case and is disposed opposite to the air outlet. When the fan works, the fan extracts the hot air generated by the battery cells in the case, and enables the cold air outside to enter the case from the air inlet, so as to achieve air-cooling the battery cells.

[0003] However, after the cold air outside enters the case, since the flow direction and flow rate of the cold air can only be adjusted and controlled by the way of the fan sucking air, if the air in the case is blocked by the battery cells or other components, it is easy to form an internal air short circuit and cannot be discharged outside the case in time, thereby causing local overheating in the case. In severe cases, it may even cause thermal runaway of the battery cells.

[0004] This part provides background information related to this application, and these background information are not necessarily prior art. Summary of the Utility Model

[0005] The purpose of this application is to provide an air-cooled battery pack, which can improve the air-cooling efficiency and the safety of the battery pack.

[0006] In order to achieve the above object, this application adopts the following technical solutions:

[0007] An air-cooled battery pack includes:

[0008] A case having a first air port and a second air port;

[0009] A fan installed at the second air port;

[0010] A first air guide channel extending along the first direction of the case. The first end of the first air guide channel is hermetically surrounded around the circumference of the second air port, and its second end is closed;

[0011] A second air guide channel extending along the second direction of the case. The second direction intersects with the first direction and is perpendicular to the height direction of the case. The second air guide channel is used to connect the first air guide channel and the first air port.

[0012] As an optional solution of the air-cooled battery pack, the air-cooled battery pack further includes multiple battery cells, and the multiple battery cells are divided into at least two groups of battery cell groups arranged at intervals along the second direction.

[0013] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes a first sealing structure located between the battery cell group and the end plate of the casing. The first sealing structure and the bottom plate of the casing cooperate to enclose an air outlet section of the first air guiding channel, and the air outlet section is hermetically enclosed around the periphery of the second air outlet.

[0014] As an alternative to the air-cooled battery pack, the first sealing structure includes a first sealing plate, a second sealing plate, and a third sealing plate. The first sealing plate is hermetically fitted with the end plate of the casing and is located above the second air outlet; the upper ends of the second sealing plate and the third sealing plate are both hermetically fitted with the first sealing plate and symmetrically located on both sides of the first sealing plate, and the lower ends of the second sealing plate and the third sealing plate are both hermetically fitted with the bottom plate of the casing; the second sealing plate and the third sealing plate are respectively located on both sides of the second air outlet and are both hermetically fitted with the end plate of the casing.

[0015] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes a second sealing structure located between two adjacent battery cell groups. The second sealing structure, the bottom plate of the casing, and the side surface of the battery cell group cooperate to enclose an air inlet section of the first air guiding channel, and the air inlet section is communicated with the second air guiding channel.

[0016] As an alternative to the air-cooled battery pack, the second sealing structure includes a wind guiding plate extending along the first direction. The wind guiding plate, the bottom plate of the casing, and the side surface of the battery cell group cooperate to enclose the air inlet section.

[0017] As an alternative to the air-cooled battery pack, the second sealing structure includes a sealing gasket, and the sealing gasket is provided between the side surface of the battery cell group and the wind guiding plate.

[0018] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes a closing plate located between two adjacent battery cell groups. The upper end of the closing plate is hermetically fitted with the wind guiding plate, and its lower end is hermetically fitted with the bottom plate of the casing to close one end of the air inlet section away from the air outlet section; or

[0019] The air-cooled battery pack further includes a closing plate and a fixing bracket. The closing plate is located between two adjacent battery cell groups. The fixing bracket is fixed on the bottom plate of the casing. The upper end of the closing plate is hermetically fitted with the wind guiding plate, and its lower end is hermetically fitted with the fixing bracket to close one end of the air inlet section away from the air outlet section.

[0020] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes a first closed structure located between the battery cells and the case. The first closed structure includes a wall-like structure with openings at both ends, and the wall-like structure encloses to form the outlet section of the first air guiding channel; and / or

[0021] The air-cooled battery further includes a second closed structure located between adjacent two sets of battery cell groups. The second closed structure includes a wall-like structure with openings at both ends, and the wall-like structure encloses to form the inlet section of the first air guiding channel.

[0022] As an alternative to the air-cooled battery pack, the air-cooled battery pack further includes an air duct in which a second air guiding channel is formed. Among the battery cells in the same set of battery cell groups, there is an air duct between adjacent two battery cells.

[0023] The beneficial effects of the present application are as follows:

[0024] The air-cooled battery pack provided by the present application includes a case, a fan, a first air guiding channel and a second air guiding channel. The first air guiding channel extends along a first direction of the case. The first end of the first air guiding channel is hermetically enclosed around the periphery of the second air outlet, and its second end is closed. The second air guiding channel extends along a second direction of the case. The second direction intersects with the first direction and is perpendicular to the height direction of the case. The second air guiding channel is used to connect the first air guiding channel and the first air inlet. When the fan works, external air flows in from the first air inlet and flows into the first air guiding channel after passing through the second air guiding channel. Since the first end of the first air guiding channel is hermetically engaged with the periphery of the second air outlet and the second end of the first air guiding channel is closed, it is ensured that the air flow in the first air guiding channel can only be discharged from the fan at the second air outlet and cannot flow into other spaces inside the case, thereby avoiding the situation where the air flow cannot be discharged from the case due to internal air short circuit, avoiding local overheating inside the case, and improving the air-cooling efficiency. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description in the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the content of the embodiments of the present application and these drawings without creative efforts.

[0026] Figure 1 Shows a schematic structural diagram of an air-cooled battery pack provided by the present application;

[0027] Figure 2 Shows Figure 1 A cross-sectional schematic diagram of the air-cooled battery pack in

[0028] Figure 3 shows Figure 1 an exploded schematic view of an air-cooled battery pack;

[0029] Figure 4 shows Figure 1 a schematic structural view of an air-cooled battery pack with the end plate and top plate of the case omitted;

[0030] Figure 5 shows a cross-sectional schematic view of an air-cooled battery pack according to another example provided by the present application in one direction;

[0031] Figure 6 shows Figure 5 a cross-sectional schematic view of the air-cooled battery pack in another direction.

[0032] Reference numerals:

[0033] 100, the first air guide channel; 200, the second air guide channel;

[0034] 1, the case; 11, the end plate; 111, the second air outlet; 12, the side plate; 121, the first air outlet; 13, the bottom plate; 14, the top plate;

[0035] 2, the fan;

[0036] 3, the battery cell;

[0037] 4, the first sealing structure; 41, the first sealing plate; 42, the second sealing plate; 43, the third sealing plate;

[0038] 5, the second sealing structure; 51, the air guide plate; 52, the gasket;

[0039] 6, the sealing plate;

[0040] 7, the fixing bracket;

[0041] 8, the barrier member; 81, the first partition; 81a, the first air guide surface; 82, the second partition; 82a, the second air guide surface;

[0042] 9, the air duct; 91, the air channel. Detailed implementation manners

[0043] Before explaining any implementation manner of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0044] In this application, the terms "comprise", "include", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising an..." does not preclude the presence of additional identical elements in the process, method, article or apparatus comprising that element.

[0045] In this application, the term "and / or" describes the relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0046] In this application, the terms "connect", "combine", "couple", "mount" may be direct connections, combinations, couplings or mountings, or may be indirect connections, combinations, couplings or mountings. For example, direct connection means that two parts or components are connected together without the need for an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0047] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use in relation to a particular value, etc. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. A relative term may refer to a plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values having tolerances. In addition, when expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0048] In this application, those of ordinary skill in the art will understand that functions performed by a component may be performed by one component, multiple components, one part, or multiple parts. Similarly, functions performed by a part may also be performed by one part, one component, or a combination of multiple parts.

[0049] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "back" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the back side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower back, etc.

[0050] Figure 1 The structural schematic diagram of an example air-cooled battery pack provided by this application is shown. Figure 2 is shown Figure 1 the cross-sectional schematic diagram of the air-cooled battery pack in. As Figures 1 to 2 shown, the air-cooled battery pack provided by this application includes a box shell 1, a fan 2, and a plurality of battery cells 3. The plurality of battery cells 3 are installed in the box shell 1; the box shell 1 has a first air inlet 121 and a second air outlet 111; the fan 2 is installed at the second air outlet 111, and is used to extract the hot air in the box shell 1 and make the external cold air enter the box shell 1, so as to realize air-cooling the battery cells 3 in the box shell 1. Among them, the first air inlet 121 is the air inlet, and the second air outlet 111 is the air outlet.

[0051] The plurality of battery cells 3 are divided into two groups of battery cell groups, and the two groups of battery cell groups are arranged at intervals along the second direction of the box shell 1. Each group of battery cell groups has a plurality of battery cells 3 arranged at intervals along the first direction of the box shell 1. At least one first air inlet 121 is correspondingly arranged at the interval between two adjacent battery cells 3. When the fan 2 works, the external air enters the interval between two adjacent battery cells 3 from the first air inlet 121, then flows to the interval between the two groups of battery cell groups, and finally is discharged from the second air outlet 111 under the action of the fan 2, so as to realize air-cooling all the battery cells 3.

[0052] The air-cooled battery pack further includes a first air guide channel 100 and a second air guide channel 200. The first air guide channel 100 extends along a first direction of the housing 1. The first end of the first air guide channel 100 is hermetically surrounded by the periphery of the second air outlet 111, and its second end is closed. The second air guide channel 200 extends along a second direction of the housing 1. The second direction intersects with the first direction and is perpendicular to the height direction of the housing 1. The second air guide channel 200 is used to connect the first air guide channel 100 and the first air outlet 121. When the fan 2 operates, external air flows in from the first air outlet 121, and after passing through the second air guide channel 200, it flows into the first air guide channel 100. Since the first end of the first air guide channel 100 is hermetically engaged with the periphery of the second air outlet 111 and the second end of the first air guide channel 100 is closed, it is ensured that the air flow in the first air guide channel 100 can only be discharged from the fan 2 at the second air outlet 111 and cannot flow into other spaces inside the housing 1, thereby avoiding the situation where the air flow cannot be discharged from the housing 1 due to internal air short circuit, preventing local overheating inside the housing 1, and improving the air-cooling efficiency.

[0053] Figure 3 shows Figure 1 a disassembled schematic view of the air-cooled battery pack in the figure. As Figure 3 combined with Figure 1 shown, the housing 1 includes an end plate 11, side plates 12, a bottom plate 13, and a top plate 14. The bottom plate 13 and the top plate 14 are disposed opposite to each other. The two end plates 11 are spaced apart at both ends of the bottom plate 13 and the top plate 14 in the first direction. The two side plates 12 are spaced apart at both ends of the bottom plate 13 and the top plate 14 in the second direction. Among them, one end plate 11 has a second air outlet 111, and both of the two side plates 12 have a first air outlet 121.

[0054] In one embodiment, the two side plates 12 and the bottom plate 13 are of an integrally formed structure, and then the two end plates 11 are detachably fixed to the side plates 12 and the bottom plate 13, thereby forming a frame structure with an open upper end. Then, the top plate 14 is detachably fixed to the open end of the frame structure, thereby forming the housing 1. In another embodiment, the two side plates 12, the two end plates 11, and the bottom plate 13 are of an integrally formed frame structure, and the top plate 14 is detachably installed at the open end of the frame structure.

[0055] Figure 4 shows Figure 1 a schematic view of the structure of the air-cooled battery pack with the end plate 11 and the top plate 14 of the housing 1 omitted in the figure. As Figure 4 combined with Figure 3As shown, the air-cooled battery pack further includes a first sealing structure 4. The first sealing structure 4 is located between the battery cell group and the end plate 11 of the casing 1. The first sealing structure 4 and the bottom plate 13 of the casing 1 cooperate to enclose an air outlet section of the first air guiding channel 100. The air outlet section is hermetically enclosed around the circumference of the second air outlet 111. By providing the first sealing structure 4, it can be achieved that the air outlet section of the first air guiding channel 100 is only connected to the second air outlet 111, preventing air flow from straying into other spaces of the casing 1 and improving the air-cooling efficiency.

[0056] In one embodiment, the first sealing structure 4 includes a first sealing plate 41, a second sealing plate 42 and a third sealing plate 43. The first sealing plate 41 is hermetically fitted with the end plate 11 of the casing 1 and is located above the second air outlet 111. The upper ends of the second sealing plate 42 and the third sealing plate 43 are both hermetically fitted with the second sealing plate 42 and are symmetrically located on both sides of the second sealing plate 42. The lower ends of the second sealing plate 42 and the third sealing plate 43 are both hermetically fitted with the bottom plate 13 of the casing 1. The second sealing plate 42 and the third sealing plate 43 are respectively located on both sides of the second air outlet 111 and are both hermetically fitted with the end plate 11 of the casing 1. In other words, the first sealing plate 41, the second sealing plate 42, the third sealing plate 43 and the bottom plate 13 of the casing 1 cooperate together to achieve that the air outlet section of the first air guiding channel 100 is only connected to the second air outlet 111, and the air outlet section of the first air guiding channel 100 is hermetically enclosed around the circumference of the second air outlet 111, preventing air flow from straying into other spaces of the casing 1 and improving the air-cooling efficiency.

[0057] In another embodiment, the first sealing structure 4 includes a wall-like structure with openings at both ends. The wall-like structure encloses an air outlet section of the first air guiding channel 100, and the above effect can also be achieved, which will not be elaborated here. In other words, only by forming the air outlet section of the first air guiding channel 100 with the wall-like structure, it is not necessary to cooperate with the bottom plate 13 of the casing 1. For example, the wall-like structure can be a ventilation duct with a rectangular cross-section.

[0058] In one embodiment, the air-cooled battery pack further includes a second sealing structure 5. The second sealing structure 5 is located between adjacent two groups of battery cell groups and is spaced from the bottom plate 13 of the casing 1. The second sealing structure 5, the bottom plate 13 of the casing 1 and the side surfaces of the battery cell groups cooperate to enclose an air inlet section of the first air guiding channel 100. The air inlet section is connected to the second air guiding channel 200.

[0059] The second sealing structure 5 includes a wind guiding plate 51. The wind guiding plate 51 extends along the first direction. The wind guiding plate 51, the bottom plate 13 of the casing 1 and the side surfaces of the battery cell groups cooperate to enclose the air inlet section, so as to ensure that the air inlet section forms a hermetically enclosed air guiding cavity, and further enable the air flow entering the air inlet section to only flow towards the air outlet section and not stray in other directions.

[0060] In another embodiment, the air-cooled battery further includes a second enclosing structure 5. The second enclosing structure 5 is located between adjacent two groups of battery cell groups. The second enclosing structure 5 includes a wall-like structure with openings at both ends. The wall-like structure encloses to form an air inlet section of the first air guiding channel 100. In other words, only the wall-like structure forms the air inlet section of the first air guiding channel 100, without the need to cooperate with the bottom plate 13 or the top plate 14 of the casing 1 and the side surfaces of the battery cell groups. For example, the wall-like structure can be a ventilation duct with a rectangular cross-section.

[0061] To ensure the sealing between the air guiding plate 51 and the battery cell groups, the second enclosing structure 5 includes a sealing gasket 52. A sealing gasket 52 is provided between the side surface of the battery cell group and the air guiding plate 51. Specifically, the number of the sealing gaskets 52 is two, and each group of battery cell groups and the air guiding plate 51 have such a sealing gasket 52. The sealing gasket 52 can be selected as a rubber sealing member, etc., and no further examples will be given here.

[0062] The air-cooled battery pack further includes a closing plate 6. The closing plate 6 is located between adjacent two groups of battery cell groups. The upper end of the closing plate 6 is in sealing cooperation with the air guiding plate 51, and its lower end is in sealing cooperation with the bottom plate 13 of the casing 1 to close one end of the air inlet section away from the air outlet section. In this embodiment, the air-cooled battery pack further includes a fixing bracket 7. The closing plate 6 is located between adjacent two groups of battery cell groups. The fixing bracket 7 is fixed on the bottom plate 13 of the casing 1. The upper end of the closing plate 6 is in sealing cooperation with the air guiding plate 51, and its lower end is in sealing cooperation with the fixing bracket 7 to close one end of the air inlet section away from the air outlet section.

[0063] In this embodiment, the first sealing plate 41, the air guiding plate 51 and the closing plate 6 are of an integrally formed structure. For example, the first sealing plate 41, the air guiding plate 51 and the closing plate 6 are integrally formed by punching and bending a metal plate. In other embodiments, it can also be that the first sealing plate 41, the second sealing plate 42, the third sealing plate 43, the air guiding plate 51 and the closing plate 6 are integrally formed, which is not limited here.

[0064] Further, the two fixing brackets 7 are respectively located at both ends of the battery cell group in the first direction. The fixing brackets 7 are fixed on the bottom plate 13 of the casing 1. One of the fixing brackets 7 is used to support and install the second sealing plate 42 and the third sealing plate 43, and the other fixing bracket 7 is used to support and install the closing plate 6. The first sealing plate 41 is installed on the second sealing plate 42 and the third sealing plate 43. One end of the air guiding plate 51 is connected to the first sealing plate 41, and the other end is connected to the closing plate 6.

[0065] Figure 5 Fig. shows a cross-sectional schematic view of another example of the air-cooled battery pack provided by the present application in one direction. Figure 6 Fig. shows Figure 5Cross-sectional schematic diagram of the air-cooled battery pack in another direction. The air-cooled battery pack further includes a barrier member 8 disposed in the first air guide channel 100 and extending along the first direction. The barrier member 8 is used to prevent the problem of excessive air resistance caused by the oncoming air intake of the second air guide channels 200 on both sides, avoid the mutual impact of the airflows on both sides, and can guide the airflows, reduce the air resistance, and improve the air-cooling efficiency.

[0066] The barrier member 8 has a first air guide surface 81a and a second air guide surface 82a. From the direction where the second air outlet 111 is located to the direction away from the second air outlet 111, the first air guide surface 81a and the second air guide surface 82a gradually incline away from each other. The first air guide surface 81a and the second air guide surface 82a have the following effects: First, after the oncoming air intake on the side, it can flow by itself along the slope directions of the first air guide surface 81a and the second air guide surface 82a, solving the problem that the suction force of the fan 2 is smaller at the position farther away from the fan 2; Second, it solves the convection problem caused by the oncoming air on the side; Third, at the position farther away from the fan 2, the distance between the battery cell 3 and the first air guide surface 81a or the second air guide surface 82a is smaller, that is, the flow area of the air is smaller. According to the flow principle, the smaller the area, the faster the flow rate, that is, the cooling air flow rate at the rear part (the end far away from the fan 2) of the battery pack is faster, and the hot air after heat exchange at the rear part will be preferentially discharged from the cooling air flow of the battery cells 3 at the front part (the end close to the fan 2), greatly reducing the contact time between the hot air after heat exchange of the battery cells 3 at the rear part and the battery cells 3 at the front part, avoiding the problem of overheating of the battery cells 3 at the front part, and ensuring the temperature consistency of the battery cells 3 in the box shell 1.

[0067] The barrier member 8 includes a first partition plate 81 and a second partition plate 82 arranged at an acute angle. The surface of the first partition plate 81 facing away from the second partition plate 82 forms the first air guide surface 81a, and the surface of the second partition plate 82 facing away from the first partition plate 81 forms the second air guide surface 82a. Further, the first air guide plate 51 and the second air guide plate 51 are arranged axially symmetrically about the center line of the first air guide channel 100 to ensure that the air-cooling efficiencies of the two groups of battery cell groups are equivalent.

[0068] In order to prevent the air from entering the V-shaped cavity of the barrier member 8, the upper end of the barrier member 8 is sealingly fitted with the air guide plate 51, the lower end of the barrier member 8 is sealingly fitted with the bottom plate 13 of the box shell 1, and the open end of the barrier member 8 is sealingly fitted with the closing plate 6.

[0069] See Figure 3 and Figure 6As shown, the air-cooled battery packs in the above two examples both include an air duct 9. Among the cells in the same cell group, there is an air duct 9 between adjacent two cells 3. The air duct 9 has an air duct 91 that communicates with the first air inlet 121 and the first air guiding channel 100. The air duct 91 can serve as the air guiding cavity of the second air guiding channel 200, so as to guide the air flow from the first air inlet 121 and ensure that the air flow can stably and smoothly flow into the first air guiding channel 100. It can be understood that heat transfer between the cell 3 and the air flow in the air duct 91 is carried out through the air duct 9, so as to achieve air-cooling and temperature reduction of the cell 3. The material of the air duct 9 can be a material with good heat conductivity, such as metal, etc.

[0070] A single air duct 9 has a plurality of air ducts 91 arranged along the height direction of the casing 1, that is, the plurality of air ducts 91 form a plurality of independent air guiding cavities of the second air guiding channel 200, which can shunt and guide the air flow entering from the air inlet, ensure the stability of the air flow, and reduce the air flow resistance.

[0071] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by using equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. An air-cooled battery pack, characterized in that: include: The box shell (1) has a first air outlet (121) and a second air outlet (111); A fan (2) installed at the second air outlet (111); A first air guiding channel (100) extends along a first direction of the housing (1), a first end of the first air guiding channel (100) being sealed and arranged around the second air outlet (111), and a second end of the first air guiding channel (100) being closed; A second air guiding channel (200) extends along a second direction of the box shell (1), the second direction intersecting with the first direction and being perpendicular to the height direction of the box shell (1), the second air guiding channel (200) being used to connect the first air guiding channel (100) and the first air outlet (121).

2. The air-cooled battery pack according to claim 1, characterized in that: The air-cooled battery pack further comprises a plurality of battery cells (3), wherein the plurality of battery cells (3) are divided into at least two groups of battery cell groups spaced apart along the second direction.

3. The air-cooled battery pack according to claim 2, characterized in that: The air-cooled battery pack further comprises a first closed structure (4), the first closed structure (4) being located between the battery cell group and the end plate (11) of the box shell (1), the first closed structure (4) cooperating with the bottom plate (13) of the box shell (1) to enclose an air outlet section of the first air guide channel (100), the air outlet section being sealed and enclosed around the second air outlet (111).

4. The air-cooled battery pack according to claim 3, characterized in that: The first closed structure (4) comprises a first sealing plate (41), a second sealing plate (42) and a third sealing plate (43); the first sealing plate (41) is sealed with the end plate (11) of the box shell (1) and is located above the second air outlet (111); the upper end of the second sealing plate (42) and the upper end of the third sealing plate (43) are both sealed with the first sealing plate (41) and are symmetrically located on both sides of the first sealing plate (41); the lower end of the second sealing plate (42) and the lower end of the third sealing plate (43) are both sealed with the bottom plate (13) of the box shell (1); the second sealing plate (42) and the third sealing plate (43) are respectively located on both sides of the second air outlet (111) and are both sealed with the end plate (11) of the box shell (1).

5. The air-cooled battery pack according to claim 3, characterized in that: The air-cooled battery pack further comprises a second closed structure (5), the second closed structure (5) being located between two adjacent groups of the battery cell groups, the second closed structure (5), the bottom plate (13) of the box shell (1) and the side surfaces of the battery cell groups cooperate to form an air inlet section of the first air guide channel (100), and the air inlet section is in communication with the second air guide channel (200).

6. The air-cooled battery pack according to claim 5, characterized in that: The second closed structure (5) comprises an air guide plate (51), the air guide plate (51) extending along the first direction, and the air guide plate (51), the bottom plate (13) of the box shell (1) and the side surface of the battery cell group cooperate to form the air inlet section.

7. The air-cooled battery pack according to claim 6, characterized in that: The second closed structure (5) comprises a sealing gasket (52), and the sealing gasket (52) is provided between the side surface of the battery cell group and the air guide plate (51).

8. The air-cooled battery pack according to claim 6, characterized in that: The air-cooled battery pack further comprises a closing plate (6), the closing plate (6) being located between two adjacent groups of the battery cell groups, the upper end of the closing plate (6) being sealed with the air guide plate (51), and the lower end of the closing plate (6) being sealed with the bottom plate (13) of the box shell (1), so as to close the end of the air inlet section away from the air outlet section; or The air-cooled battery pack also includes a closing plate (6) and a fixing bracket (7), wherein the closing plate (6) is located between two adjacent groups of battery cells, and the fixing bracket (7) is fixed to the bottom plate (13) of the box shell (1). The upper end of the closing plate (6) is sealed with the air guide plate (51), and the lower end of the closing plate (6) is sealed with the fixing bracket (7) to close the end of the air inlet section away from the air outlet section.

9. The air-cooled battery pack according to claim 2, characterized in that: The air-cooled battery pack further comprises a first closed structure (4), the first closed structure (4) being located between the battery cell (3) and the box shell (1), the first closed structure (4) comprising a wall-like structure with openings at both ends, the wall-like structure enclosing an air outlet section of the first air guide channel (100); and / or The air-cooled battery further comprises a second closed structure (5), the second closed structure (5) being located between two adjacent groups of battery cells, the second closed structure (5) comprising a wall-like structure with openings at both ends, the wall-like structure enclosing an air inlet section of the first air guide channel (100).

10. The air-cooled battery pack according to any one of claims 2 to 9, characterized in that: The air-cooled battery pack further comprises an air duct (9), wherein an air guide cavity of the second air guide channel (200) is formed in the air duct (9), and in the same group of battery cells, the air duct (9) is provided between two adjacent battery cells (3).

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