Venting member, battery tray, battery pack, and electrical device

Abstract

The present disclosure relates to an electrical device. The electrical device comprises a battery pack, the battery pack having a battery tray, and the battery tray having a venting member. The venting member has a first surface and a second surface which are opposite one another. The first surface is used for bearing a battery cell, and the first surface is provided with an air inlet. The air inlet is in communication with an explosion-proof valve of the battery cell. The second surface is provided with an air outlet, and the air outlet is in communication with the air inlet. In a direction perpendicular to the first surface, the projection of the air inlet on the second surface is at least partially staggered from the air outlet.

Description

Exhaust member, battery tray, battery pack and electric device

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410854674.1, filed on June 27, 2024, and entitled "Exhaust member, battery tray, battery pack and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, in particular, to an exhaust member, a battery tray, a battery pack and an electric device. BACKGROUND

[0004] In the related art, the battery pack of an electric vehicle is fixed with battery cells, and the tray of the battery pack is provided with an exhaust passage. When the battery cells are thermally failed, the high-temperature flue gas generated by the thermal failure of the battery cells enters the exhaust passage through the explosion-proof valve, and the high-temperature flue gas is discharged through the exhaust passage.

[0005] However, the design of the battery tray in the related art has defects, and there is a risk that the battery tray will be deformed or damaged at the position of the exhaust passage or that external foreign matter will penetrate and cause the battery cells to be pierced. SUMMARY

[0006] The purpose of the present disclosure is to provide an exhaust member, a battery tray, a battery pack and an electric device to solve the problem that the battery tray in the related art is easily deformed at the exhaust passage, thereby reducing the risk that the explosion-proof valve of the battery cell will be pierced due to the deformation of the battery tray.

[0007] To achieve the above-mentioned purpose, the present disclosure provides an exhaust member in a first aspect, the exhaust member has opposite first and second faces, the first face is used to carry battery cells, the first face is provided with an air inlet, the air inlet is used to communicate with an explosion-proof valve of the battery cell, the second face is provided with an air outlet, the air outlet and the air inlet are communicated; wherein, in a direction perpendicular to the first face, a projection of the air inlet on the second face is at least partially staggered with the air outlet.

[0008] Optionally, the exhaust member is internally provided with at least one cavity, and the air inlet is communicated with the air outlet through the cavity.

[0009] Optionally, the exhaust member comprises an exhaust member body, the cavity is arranged in the exhaust member body, and at least one flow guide portion is arranged in the cavity, the flow guide portion being used to guide the flue gas of the air inlet to the air outlet.

[0010] Optionally, the cavity wall of the cavity comprises opposite first and second cavity walls, the air inlet penetrates through the first face and the first cavity wall, and the air outlet penetrates through the second face and the second cavity wall; the flow guide part is arranged on the first cavity wall and / or the second cavity wall.

[0011] Optionally, the at least one cavity comprises a first cavity, the first cavity is communicated with a plurality of spaced air inlets, and adjacent two air inlets are respectively connected to explosion-proof valves of corresponding adjacent two battery cells; the flow guide part comprises a first flow guide part, the first flow guide part is arranged on the first cavity wall, and the first flow guide part is located between adjacent two air inlets.

[0012] Optionally, the first flow guide part comprises an inclined pair of first flow guide surfaces, a distance between one end of the pair of first flow guide surfaces close to the second cavity wall is smaller than a distance between the other end of the pair of first flow guide surfaces away from the second cavity wall; one of the pair of first flow guide surfaces is used for guiding flue gas of one of the adjacent two air inlets to the air outlet, and the other of the pair of first flow guide surfaces is used for guiding flue gas of the other of the adjacent two air inlets to the same air outlet.

[0013] Optionally, the air outlet part comprises the air outlet arranged opposite to the first flow guide part.

[0014] Optionally, the at least one cavity comprises a second cavity, the second cavity is communicated with a plurality of spaced air outlets; the flow guide part comprises a second flow guide part, the second flow guide part is arranged on the second cavity wall, and the second flow guide part is located between adjacent two air outlets.

[0015] Optionally, the second flow guide part comprises an inclined pair of second flow guide surfaces, a distance between one end of the pair of second flow guide surfaces close to the first cavity wall is smaller than a distance between the other end of the pair of second flow guide surfaces away from the first cavity wall; one of the pair of second flow guide surfaces is used for guiding flue gas of the air inlet to one of the adjacent two air outlets, and the other of the pair of second flow guide surfaces is used for guiding flue gas of the same air inlet to the other of the adjacent two air outlets.

[0016] Optionally, the air outlet part comprises the air inlet arranged opposite to the second flow guide part.

[0017] Optionally, the cavity wall of the cavity comprises opposite first and second cavity walls and a first side wall connecting the first and second cavity walls, the air inlet penetrates through the first face and the first cavity wall, and the air outlet penetrates through the second face and the second cavity wall; the first side wall is arranged obliquely from the air inlet to the air outlet to form the flow guide part.

[0018] Optionally, the exhaust member has at least two of the air inlets, and the cavity wall further comprises a second side wall connecting the first cavity wall and the second cavity wall, the second side wall being oppositely arranged to the first side wall; the first side wall is arranged to be inclined from one of the two air inlets towards the exhaust outlet to form the flow guide, and the second side wall is arranged to be inclined from the other of the two air inlets towards the exhaust outlet to form the flow guide.

[0019] Optionally, the flow guide is integrally formed with the exhaust member body.

[0020] Optionally, the air inlet is connected with a sealing member, the sealing member being used to close the air inlet, and the sealing member being capable of opening the air inlet under the action of the exhaust gas discharged by the explosion-proof valve.

[0021] Optionally, the sealing member is provided with a lower recess, and a periphery of the sealing member is connected to the first surface, and the lower recess is located in the air inlet.

[0022] Optionally, a heat insulation member is connected to one side of the lower recess towards the second surface, and the heat insulation member is adapted to insulate heat between the lower recess and the cavity.

[0023] Optionally, the second surface is provided with a protective net, and the protective net is used to block external objects from entering the exhaust outlet.

[0024] Optionally, in a direction perpendicular to the first surface, an outer contour of a projection of the air inlet on the second surface is spaced apart from an outer contour of the exhaust outlet.

[0025] Optionally, in a direction perpendicular to the first surface, an outer contour of a projection of the air inlet on the second surface is connected to an outer contour of the exhaust outlet.

[0026] Optionally, in a direction perpendicular to the first surface, an outer contour of a projection of the air inlet on the second surface deviates from a center of the exhaust outlet. The present disclosure provides, in a second aspect, a battery tray, comprising a bottom plate and the above-mentioned exhaust member, the exhaust member being mounted on an inner side of the bottom plate, or the exhaust member being configured as the bottom plate.

[0027] Optionally, the battery tray further comprises a guard plate, the guard plate being located on an outer side of the bottom plate, and the guard plate being spaced apart from the bottom plate to form a smoke exhaust passage between the guard plate and the second surface, the smoke exhaust passage being communicated with the exhaust outlet.

[0028] Optionally, a support is arranged between the backplate and the bottom plate, and the support, the bottom plate and the backplate jointly define the smoke exhaust channel.

[0029] Optionally, the battery tray further comprises a frame and an exhaust valve, the frame is arranged on the bottom plate, and the exhaust valve is arranged on the frame and communicates with the smoke exhaust channel.

[0030] The battery pack in the third aspect of the present disclosure comprises a battery cell and the battery tray as described above; the battery cell is carried on the first surface of the exhaust member, and the explosion-proof valve of the battery cell communicates with the air inlet.

[0031] Optionally, the explosion-proof valve is arranged at the bottom of the battery cell towards the first surface, and the explosion-proof valve is arranged correspondingly with the air inlet. The electric device in the fourth aspect of the present disclosure comprises an electric device body and the battery pack as described above, the battery pack is installed on the electric device body and used to supply power to the electric device body; or the electric device comprises a battery cell and the exhaust member as described above, and the battery cell is carried on the first surface of the exhaust member.

[0032] According to the above technical solution, the projection of the air inlet on the second surface is arranged to be at least partially staggered with the exhaust port, so that the air inlet and the exhaust port are not completely opposite, and when the second surface of the exhaust member or the tray is deformed or damaged or foreign matter penetrates from the outside, the deformed structure or foreign matter will enter the exhaust port and hit the first surface to stagger with the air inlet, thereby reducing the risk of the deformed structure or foreign matter penetrating from the air inlet, and further reducing the risk of piercing the battery cell.

[0033] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0035] FIG. 1 is a partial cross-sectional view of an exhaust member according to an exemplary embodiment of the present disclosure.

[0036] FIG. 2 is a partial cross-sectional view of an exhaust member provided with a first flow guide according to an exemplary embodiment of the present disclosure.

[0037] FIG. 3 is a partial cross-sectional view of an exhaust member provided with a second flow guide according to an exemplary embodiment of the present disclosure.

[0038] FIG. 4 is a partial cross-sectional view schematically illustrating an exhaust member provided with a second flow guide portion according to an exemplary embodiment of the present disclosure (different from the structure of FIG. 3).

[0039] FIG. 5 is a partial cross-sectional view schematically illustrating an exhaust member in a connected state with a seal member and a heat insulating member according to an exemplary embodiment of the present disclosure.

[0040] FIG. 6 is a partial cross-sectional view schematically illustrating an exhaust member in a connected state with a protective net according to an exemplary embodiment of the present disclosure.

[0041] FIG. 7 is a partial cross-sectional view schematically illustrating a partial structure of a battery tray according to an exemplary embodiment of the present disclosure.

[0042] FIG. 8 is a partial cross-sectional view schematically illustrating a battery tray in a mounted state with a battery cell according to an exemplary embodiment of the present disclosure.

[0043] FIG. 9 is a perspective view schematically illustrating a battery tray in a mounted state with a battery cell group according to an exemplary embodiment of the present disclosure.

[0044] FIG. 10 is a cross-sectional view schematically illustrating a partial structure of a battery tray provided with an exhaust valve according to an exemplary embodiment of the present disclosure.

[0045] FIG. 11 is a block diagram schematically illustrating a structure of an electric device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] Hereinafter, a detailed description will be given of a specific embodiment of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiment described herein is merely intended to illustrate and explain the present disclosure, and is not intended to limit the present disclosure.

[0047] In the description of the present disclosure, it should be understood that the terms "upper", "lower", and the like indicate the positional or locational relationship defined based on the drawing surface direction of the accompanying drawings (e.g., FIG. 1), and are merely intended to facilitate the description of the present disclosure and simplify the description, and thus should not be construed to indicate or imply that the indicated device or element must have a particular orientation, and a particular orientation configuration and operation, and thus should not be construed as limiting the present disclosure, in addition, the terms "inner" and "outer" refer to the inner and outer of the corresponding structure profile. In addition, the terms "first", "second", and the like are merely intended to distinguish one element from another element, and do not have sequentiality and importance.

[0048] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connect", "connected", "install" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0049] Research finds that in the related art, the design of the battery tray has the risk of insufficient protection of the explosion-proof valve. When the bottom guard plate of the battery pack is severely deformed or broken by external extrusion, the deformed part of the guard plate has the risk of piercing the explosion-proof valve through the bottom plate hole (the exhaust hole corresponding to the explosion-proof valve of the battery cell) to cause the battery cell to leak.

[0050] Therefore, as shown in FIGS. 1-10, the present disclosure provides, in a first aspect, an exhaust member 21 having opposite first and second faces 201 and 202, the first face 201 for carrying a battery cell 11, the first face 201 being provided with an air inlet 211 for communicating with an explosion-proof valve 12 of the battery cell 11, and the second face 202 being provided with an air outlet 212 in communication with the air inlet 211. Wherein, in a direction perpendicular to the first face 201, the projection of the air inlet 211 on the second face 202 is at least partially offset from the air outlet 212.

[0051] By the above technical solution, the projection of the air inlet 211 on the second face 202 is set to be at least partially offset from the air outlet 212, so that the air inlet 211 and the air outlet 212 are not completely opposite, when the second face 202 of the exhaust member 21 or the battery tray 20 is deformed or broken or foreign matter protrudes from the outside, such as when the bottom guard plate 22 of the battery tray 20 is deformed, the deformed structure or foreign matter of the battery tray 20 will hit the first face 201 and be offset from the air inlet 211, thereby reducing the risk of the deformed structure or foreign matter penetrating from the air inlet 211, and further reducing the risk of the deformed structure or foreign matter piercing the battery cell 11.

[0052] It should be noted that the above scheme not only reduces the risk of the deformed structure or foreign matter piercing the battery cell 11, but also reduces the risk of the explosion-proof valve 12 being pierced.

[0053] The present disclosure does not limit the specific structure of the exhaust member 21, and for the structure inside the exhaust member 21, in some optional embodiments, as shown in FIGS. 1-5, at least one cavity 213 is provided inside the exhaust member 21, and the air inlet 211 communicates with the air outlet 212 through the cavity 213.

[0054] The cavity 213 is arranged in the exhaust member 21, which can reduce the weight of the exhaust member 21, and the plurality of air inlets 211 can share one cavity 213, and / or the plurality of air outlets 212 can share one cavity 213, so as to reduce the machining amount of the cavity 213.

[0055] It should be noted that the opening area of the air inlet 211 and the air outlet 212 can be smaller than the cross-sectional area of the cavity 213, so that the high-temperature flue gas can be depressurized in the cavity 213 after entering the cavity 213. The shape of the air inlet 211 and / or the air outlet 212 includes but is not limited to a circular shape, a waist shape, an oval shape, and a polygonal shape, which is not limited in the present disclosure. In FIGS. 1 to 7 of the present disclosure, the air inlet 211 and the air outlet 212 are shown in a waist shape.

[0056] In order to make the flue gas enter the air inlet 211 into the air outlet 212 faster, in some optional embodiments, the exhaust member 21 includes an exhaust member body 210, the cavity 213 is arranged in the exhaust member body 210, and at least one flow guide part 27 is arranged in the cavity 213, and the flow guide part 27 is used to guide the flue gas of the air inlet 211 to the air outlet 212.

[0057] The flow guide part 27 is arranged, and after the high-temperature flue gas enters the cavity 213 from the air inlet 211, at least part of the high-temperature flue gas flows along the surface of the flow guide part 27, and then under the guidance of the flow guide part 27, the high-temperature flue gas can reach the air outlet 212 and be discharged in a shorter flow distance, so as to shorten the flow time of the high-temperature flue gas in the cavity 213.

[0058] In some optional embodiments, as shown in FIGS. 2 to 4, the cavity wall of the cavity 213 includes opposite first and second cavity walls 2131 and 2133, the air inlet 211 penetrates the first face 201 and the first cavity wall 2131, and the air outlet 212 penetrates the second face 202 and the second cavity wall 2133; the flow guide part is arranged on the first cavity wall 2131 and / or the second cavity wall 2133.

[0059] Since the air inlet 211 penetrates the first face 201 and the first cavity wall 2131, the flow guide part 27 arranged on the first cavity wall 2131 is closer to the air inlet 211, and the high-temperature flue gas entering the cavity 213 from the air inlet 211 can contact the flow guide part 27 faster and flow along the surface of the flow guide part 27. Since the air outlet 212 penetrates the second face 202 and the second cavity wall 2133, the flow guide part 27 arranged on the second cavity wall 2133 is closer to the air outlet 212, and the flue gas in the cavity 213 can reach the air outlet 212 faster and be discharged from the air outlet 212.

[0060] In the present disclosure, the flow guide portion 27 can have any appropriate structure, and the present disclosure does not limit the specific structure of the flow guide portion 27. In some alternative embodiments, as shown in FIG. 2, at least one cavity 213 includes a first cavity 2135, and the first cavity 2135 is communicated with a plurality of spaced gas inlets 211, and adjacent two gas inlets 211 are respectively used to communicate the explosion-proof valves 12 of the corresponding adjacent two battery cells 11. The flow guide portion 27 includes a first flow guide portion 221, and the first flow guide portion 221 is arranged on the first cavity wall 2131 and located between the adjacent two gas inlets 211. The first cavity 2135 is communicated with a plurality of spaced gas inlets 211, so that the plurality of gas inlets 211 can share one first cavity 2135. By arranging the first flow guide portion 221 between the adjacent two gas inlets 211, the first flow guide portion 221 can simultaneously guide the flue gas entering the adjacent two gas inlets 211.

[0061] Specifically, in some alternative embodiments, as shown in FIG. 2, the first flow guide portion 221 includes an inclined pair of first flow guide surfaces 2211, and the distance between one end of the pair of first flow guide surfaces 2211 close to the second cavity wall 2133 is less than the distance between the other end of the pair of first flow guide surfaces 2211 away from the second cavity wall 2133; one of the pair of first flow guide surfaces 2211 is used to guide the flue gas of one of the adjacent two gas inlets 211 to the gas outlet 212, and the other of the pair of first flow guide surfaces 2211 is used to guide the flue gas of the other of the adjacent two gas inlets 211 to the same gas outlet 212, that is, through the action of the pair of first flow guide surfaces 2211, the flue gas of the adjacent two gas inlets 211 can be guided to the same gas outlet 212.

[0062] The distance between one end of the pair of first flow guide surfaces 2211 close to the second cavity wall 2133 is set to be less than the distance between the other end of the pair of first flow guide surfaces 2211 away from the second cavity wall 2133, so that the two first flow guide surfaces 2211 close to the second cavity wall 2133 gradually approach each other, and then the flue gas guided by the two first flow guide surfaces 2211 can be collected together and discharged from the same gas outlet 212. Since the first flow guide surface 2211 and the second flow guide surface 2221 can respectively guide the flue gas of the two adjacent gas inlets 211 to the same gas outlet 212, the adjacent two battery cells 11 share one gas outlet 212, and the number of gas outlets 212 is reduced, which can improve the strength of the second surface 202 of the exhaust member 21 to a certain extent.

[0063] It should be noted that the plurality of battery cells 11 can be carried on the exhaust member 21, and the plurality of battery cells 11 collectively constitute the battery cell group 10. The plurality of battery cells 11 can be arranged in multiple columns, and each column of battery cells 11 is composed of at least one battery cell 11. The battery cells 11 in the same column are arranged along the Y direction as shown in FIG. 9, and the plurality of columns of battery cells 11 are arranged along the X direction as shown in FIG. 9. Adjacent two battery cells 11 can be adjacent two battery cells 11 in the same column, i.e., adjacent two battery cells 11 in the Y direction, or adjacent two battery cells 11 in adjacent two columns, i.e., adjacent two battery cells 11 in the X direction. The present disclosure does not make specific limitations on this. The pair of first flow guide surfaces 2211 can be formed by components fixed on the first flow guide portion 221, or can be formed by the surface of the first flow guide portion 221. The present disclosure does not make specific limitations on this. The first flow guide surface 2211 can be a plane or an arc surface. The present disclosure does not make specific limitations on this.

[0064] In some optional embodiments, as shown in FIG. 2, the exhaust port 212 is arranged opposite to the first flow guide portion 221, which can further reduce the distance between the first flow guide portion 221 and the exhaust port 212, so that the flue gas can flow into the exhaust port 212 through the first flow guide portion 221 more quickly.

[0065] Optionally, the extension directions of the pair of first flow guide surfaces 2211 near one end of the second surface 202 are located in the exhaust port 212, so that the flue gas can enter the exhaust port 212 through the first flow guide surface 2211 more quickly.

[0066] In some optional embodiments, as shown in FIG. 2, the pair of first flow guide surfaces 2211 are formed by the surface of the first flow guide portion 221. Specifically, the side surfaces of the opposite sides of the first flow guide portion 221 respectively constitute the two first flow guide surfaces 2211. The cross-sectional shape of the first flow guide portion 221 includes but is not limited to a trapezoidal shape or a triangular shape. The first flow guide surface 2211 can be a plane, so as to reduce the length of the flue gas flowing along the first flow guide surface 2211. The second flow guide portion 222 can also be an arc surface. The present disclosure does not make specific limitations on this.

[0067] As shown in FIGS. 3 and 4, in some optional embodiments, the at least one cavity 213 includes a second cavity 2136, the second cavity 2136 is communicated with a plurality of exhaust ports 212 arranged at intervals, the flow guide portion 27 includes a second flow guide portion 222, the second flow guide portion 222 is arranged on the second cavity wall 2133, and the second flow guide portion 222 is located between adjacent two exhaust ports 212.

[0068] The second cavity 2136 is communicated with the plurality of spaced-apart exhaust ports 212, so that the plurality of exhaust ports 212 can share one second cavity 2136. The second flow guide part 222 is arranged between two adjacent exhaust ports 212, so that the second flow guide part 222 can simultaneously guide the flue gas near the two adjacent exhaust ports 212.

[0069] As shown in FIGS. 3 and 4, in some optional embodiments, the second flow guide part 222 is provided with an inclined pair of second flow guide surfaces 2221. The interval between the ends of the pair of second flow guide surfaces 2221 close to the first cavity wall 2131 is smaller than the interval between the ends of the pair of second flow guide surfaces 2221 away from the first cavity wall 2131. One of the pair of second flow guide surfaces 2221 is used to guide the flue gas of the air inlet port 211 to one of the two adjacent exhaust ports 212, and the other of the pair of second flow guide surfaces 2221 is used to guide the flue gas of the same air inlet port 211 to the other of the two adjacent exhaust ports 212. That is, through the action of the pair of second flow guide surfaces 2221, the flue gas of the same air inlet port 211 can be guided to the two adjacent exhaust ports 212.

[0070] The interval between the ends of the pair of second flow guide surfaces 2221 close to the first cavity wall 2131 is smaller than the interval between the ends of the pair of second flow guide surfaces 2221 away from the first cavity wall 2131, so that the flue gas of the same air inlet port 211 is divided when flowing to the second flow guide part 222. Part of the flue gas flows along one of the second flow guide parts 222, and the other part of the flue gas flows along the other second flow guide part 222. Further, the second flow guide part 222 can divide the flue gas in the same air inlet port 211 into two exhaust ports 212, and accelerate the discharge of the flue gas.

[0071] As shown in FIGS. 3 and 4, in some optional embodiments, the exhaust member 21 includes the air inlet port 211 arranged opposite to the second flow guide part 222. Arranging the second flow guide part 222 opposite to the air inlet port 211 can further reduce the interval between the second flow guide part 222 and the air inlet port 211. The flue gas entering from the air inlet port 211 can be more quickly divided and guided by the second flow guide part 222, so that the flue gas can reach the exhaust port 212 more quickly.

[0072] Optionally, the extension directions of the ends of the pair of second flow guide surfaces 2221 close to the first surface 201 are both located in the air inlet port 211, so that the flue gas of the air inlet port 211 can be more quickly divided by the second flow guide part 222.

[0073] In some optional embodiments, a pair of second flow guide surfaces 2221 are formed by the surface of the second flow guide portion 222. Specifically, the side surfaces of the opposite sides of the second flow guide portion 222 respectively constitute the two second flow guide surfaces 2221. The cross-sectional shape of the second flow guide portion 222 includes but is not limited to trapezoidal or triangular. The second flow guide surfaces 2221 can adopt a plane to reduce the length of the flue gas flowing along the first flow guide surface 2211. The second flow guide portion 222 can also adopt an arc surface, and the present disclosure does not make specific limitations thereto.

[0074] In order to further guide the flue gas in the cavity, as shown in FIGS. 1-6, in some optional embodiments, the cavity wall of the cavity 213 includes opposite first and second cavity walls 2131 and 2133, and a first side wall 2132 connecting the first and second cavity walls 2131 and 2133. The gas inlet 211 penetrates the first surface 201 and the first cavity wall 2131, and the gas outlet 212 penetrates the second surface 202 and the second cavity wall 2133. The first side wall 2132 is arranged obliquely from the gas inlet 211 to the gas outlet 212 to form a flow guide portion 27.

[0075] The oblique arrangement of the first side wall 2132 to form the flow guide portion 27 enables the first side wall 2132 to guide the flue gas to the position of the gas outlet 212.

[0076] As shown in FIGS. 1-6, in some optional embodiments, the gas outlet 21 has at least two gas inlets 211, and the cavity wall of the cavity 213 further includes a second side wall 2134 connecting the first and second cavity walls 2131 and 2133, and the second side wall 2134 is arranged opposite to the first side wall 2132; the first side wall 2132 is arranged obliquely from one of the two gas inlets 211 to the gas outlet 212 to form a flow guide portion 27, and the second side wall 2134 is arranged obliquely from the other of the two gas inlets 211 to the gas outlet 212 to form a flow guide portion 27. The oblique arrangement of the second side wall 2134 to form the flow guide portion 27 enables the second side wall 2134 to guide the flue gas to the position of the gas outlet 212. In combination with the flow guiding function of the first side wall 2132, the first and second side walls 2132 and 2134 can simultaneously guide the flue gas entering through multiple gas inlets 211, thereby improving the flow guiding effect of the flue gas. It should be noted that the oblique direction and angle of the first and second side walls 2132 and 2134 can be adjusted according to the positions of the gas inlets 211 and the gas outlet 212 in the cavity 213, and the present disclosure does not make specific limitations thereto.

[0077] In some optional embodiments, the flow guide 27 is integrally formed with the exhaust member body 210. When the cavity 213 is processed, the flow guide 27 can be processed at the same time. Of course, in some other optional embodiments, the flow guide 27 and the exhaust member 21 can also be fixed together by other fixed manners such as bonding, welding or bolting.

[0078] It should be noted that the exhaust member 21 can be provided with one or more cavities 213, and each cavity 213 corresponds to a column of battery cells 11, so that the explosion-proof valve 12 of a column of battery cells 11 can correspondingly communicate with the same cavity 213 through the air inlet 211. The arrangement direction of the plurality of cavities 213 is the same as the arrangement direction of the plurality of columns of battery cells 11. For example, in FIG. 9, the plurality of cavities 213 are arranged at intervals along the X direction, and each cavity 213 is provided with a plurality of air inlets 211 along the Y direction to correspond to different battery cells 11 in the same column of battery cells 11. In addition, in FIGS. 1 to 6, the separate cavity structures are shown. In fact, when the exhaust member 21 has a plurality of cavities 213, one exhaust member 21 can have one or more cavity structures as shown in FIGS. 1 to 6 at the same time, for example, the same exhaust member 21 can be provided with the first cavity 2135 and the second cavity 2136.

[0079] In some optional embodiments, the air inlet 211 is connected with a sealing member 230, and the sealing member 230 is used to close the air inlet 211, and the sealing member 230 can open the air inlet 211 under the action of the flue gas discharged by the explosion-proof valve 12.

[0080] When the battery cells 11 in the battery cell group 10 do not occur thermal failure, the explosion-proof valve 12 is in a closed state, at this time, the sealing member 230 closes the air inlet 211, and separates the air inlet 211 from the explosion-proof valve 12, which can improve the sealing between the battery cell group 10 and the exhaust member 21, and avoid that the dust and impurities reach the air inlet 211 from the exhaust port 212 and then enter the position of the explosion-proof valve 12 of the battery cell 11. When the battery cell 11 occurs thermal failure, high-temperature and high-pressure flue gas will be generated, and the flue gas will act on the sealing member 230, so that the sealing member 230 opens the air inlet 211, so that the explosion-proof valve 12 communicates with the air inlet 211, and then the flue gas can be discharged through the air inlet 211 and the exhaust port 212 in sequence.

[0081] It should be noted that the specific way in which the sealing member 230 opens the air inlet 211 under the action of the flue gas discharged by the explosion-proof valve 12 can be that the sealing member 230 is broken by the pressure of the flue gas, so that the explosion-proof valve 12 is in communication with the air inlet 211. Alternatively, the sealing member 230 can be melted by the temperature of the flue gas, so that the explosion-proof valve 12 is in communication with the air inlet 211. Alternatively, the sealing member 230 can achieve both of the above opening ways. The present disclosure does not make specific limitations on this. In some optional embodiments, the sealing member 230 is made of plastic, which can be melted under the action of high-temperature flue gas. The plastic member can be manufactured in the form of plastic suction forming.

[0082] In some optional embodiments, the sealing member 230 is provided with a lower recess 231, and the peripheral edge of the sealing member 230 is connected to the first surface 201, and the lower recess 231 is located in the air inlet 211.

[0083] By providing the lower recess 231, the side of the lower recess 231 facing the explosion-proof valve 12 forms a groove, and when the explosion-proof valve 12 is opened, the lower recess 231 can collect the flue gas sprayed by the explosion-proof valve 12, so that the flue gas can act more quickly and more on the sealing member 230, thereby making the sealing member 230 more easily broken under the action of high-pressure flue gas to more quickly communicate the explosion-proof valve 12 and the air inlet 211, so that the flue gas discharged by the explosion-proof valve 12 can enter the air inlet 211 more quickly.

[0084] Optionally, the lower recess 231 can be arranged at the middle part of the sealing member 230, so that the lower recess is more evenly stressed and more easily broken when subjected to the impact force of the flue gas. Of course, in other embodiments, the thickness of the lower recess 231 can be made thin, so that the lower recess 231 is more easily broken under the action of the flue gas.

[0085] In some optional embodiments, the outer peripheral wall of the lower recess 231 is spaced apart from the inner wall of the air inlet 211, so as to reduce heat exchange between the lower recess 231 and the inner wall of the air inlet 211 and reduce the support of the air inlet 211 on the lower recess 231, so that the lower recess 231 is more easily melted and more easily broken under the action of high-pressure flue gas.

[0086] The present disclosure does not make specific limitations on the spacing between the outer peripheral wall of the lower recess 231 and the inner wall of the air inlet 211. Optionally, the spacing between the outer peripheral wall of the lower recess 231 and the inner wall of the air inlet 211 is 0, 4-0, 6 mm, which can form a larger groove and make the lower recess 231 more easily melted and more easily broken under the action of high-pressure flue gas.

[0087] In some optional embodiments, the side of the lower recess 231 facing the second surface 202 is connected with a heat insulating member 240, and the heat insulating member 240 is adapted to insulate heat between the lower recess 231 and the cavity 213.

[0088] When multiple air inlets 211 are in communication with the same cavity 213, since each air inlet 211 corresponds to the explosion-proof valve 12 of one battery cell 11, when the battery cell group 10 is in thermal failure, only a part of the battery cell group 10 may be in thermal failure. Therefore, the heat insulation piece 240 can prevent the smoke generated by the battery cell 11 in thermal failure from directly contacting the sealing piece 230 on the air inlet 211 corresponding to the explosion-proof valve 12 of the battery cell 11 not in thermal failure in the cavity 213, avoiding the smoke in the cavity 213 from destroying the sealing piece 230 and reversing to the battery cell 11, and further avoiding the battery cell 11 not in thermal failure from being damaged.

[0089] In some optional embodiments, as shown in FIG. 6, the second surface 202 is provided with a protective net 250, which is used to block external objects from entering the air outlet 212.

[0090] Since the protective net 250 has mesh holes, the smoke can be discharged from the mesh holes in time, and at the same time, the protective net 250 can also block external objects from entering the air outlet and causing smoke exhaust blockage. The fixing mode of the protective net 250 and the air exhaust piece 21 includes but is not limited to welding, clamping, and abutting through fasteners, etc.

[0091] In order to improve the protection effect of the protective net 250 on the air outlet 212, in some optional embodiments, the edges of the protective net 250 are fixed on the air exhaust piece 21, and the middle part of the protective net 250 covers the air outlet 212.

[0092] There are various specific arrangement modes for the projection of the air inlet 211 on the second surface 202 to be at least partially staggered with the air outlet 212, and the disclosure does not specifically limit it, as long as it can reduce the risk of the deformation structure or foreign matter penetrating out of the air inlet 211 and piercing the battery cell 11.

[0093] For example, in some optional embodiments, in the direction perpendicular to the first surface 201, the outer contour of the projection of the air inlet 211 on the second surface 202 is spaced apart from the outer contour of the air outlet 212. So that the projection of the air inlet 211 on the second surface 202 is completely staggered with the air outlet 212, and the air inlet 211 and the air outlet 212 have a greater distance to buffer the impact force of the deformation structure or foreign matter, and at the same time, the deformation structure or foreign matter is more difficult to penetrate out of the air inlet 211.

[0094] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0095] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0096] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0097] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0098] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0099] For example, in some alternative embodiments, the projection of the air inlet 211 on the second surface 202 intersects with the air outlet 212 in a direction perpendicular to the first surface 201. In this way, the projection of the air inlet 211 on the second surface 202 partially intersects with the air outlet 212, so as to further shorten the distance between the air outlet 212 and the air inlet 211.

[0100] The smoke exhaust passage 25 is formed between the guard plate 22 and the bottom plate 28, and the smoke exhaust passage 25 is in communication with the exhaust port 212, so that the flue gas discharged from the exhaust port 212 can be discharged to the outside of the battery tray 20 through the smoke exhaust passage 25.

[0101] The guard plate 22 and the bottom plate 28 of the battery pack form the smoke exhaust passage 25, which can be achieved by connecting the guard plate 22 and the bottom plate, or by connecting the guard plate 22 and the rest of the battery tray 20 (such as the frame 23 of the battery tray 20 shown in FIG. 10). The present disclosure does not make specific limitations.

[0102] In some optional embodiments, a support 24 is arranged between the guard plate 22 and the bottom plate 28, and the support 24, the bottom plate 28 and the guard plate 22 together define the smoke exhaust passage 25.

[0103] The support 24 can not only define the smoke exhaust passage 25 together with the bottom plate 28 and the guard plate 22, but also provide support force for the gap between the bottom plate 28 and the guard plate 22, so as to improve the anti-deformation ability of the guard plate 22 when it is impacted.

[0104] As shown in FIG. 10, in some optional embodiments, the battery tray 20 further includes a frame 23 and an exhaust valve 26, the frame 23 is arranged on the bottom plate 28, and the exhaust valve 26 is arranged on the frame 23, and the exhaust valve 26 is in communication with the smoke exhaust passage 25.

[0105] By arranging the exhaust valve 26 on the frame 23 and connecting the exhaust valve 26 with the smoke exhaust passage, the exhaust valve 26 can be disconnected from the outside of the battery pack 100 when the battery cell 11 does not generate flue gas due to thermal failure, so as to prevent foreign matters from entering the smoke exhaust passage. At the same time, after the battery pack 100 generates flue gas due to thermal failure, the flue gas can also act on the exhaust valve 26 to open the exhaust valve 26, so as to ensure that the flue gas can be discharged to the outside of the battery tray 20 in time.

[0106] It should be noted that the communication mode of the exhaust valve 26 and the smoke exhaust passage can be that a pipeline is arranged on the frame 23 to connect the smoke exhaust passage and the exhaust valve 26, or a passage is formed in the frame 23 to connect the smoke exhaust passage and the exhaust valve 26, or a gap is formed between the guard plate 22 and the frame 23 to connect the smoke exhaust passage and the exhaust valve 26. The present disclosure does not make specific limitations.

[0107] In addition, the present disclosure does not make specific limitations on the processing mode of the bottom plate of the battery tray 20. In some optional embodiments, the bottom plate of the battery tray 20 is an extruded profile with high mechanical strength, and the bottom plate is connected with the frame 23 of the battery tray 20 by welding (generally by friction stir welding).

[0108] Based on the above battery tray 20, as shown in FIGS. 8 and 9, the present disclosure further provides, in a third aspect, a battery pack 100 comprising the battery tray 20 described above and the battery cell 11. The bottom of the battery cell 11 is carried on the first face 201 of the exhaust member 21, and the outlet of the explosion-proof valve 12 of the battery cell 11 communicates with the air inlet 211.

[0109] It should be noted that the number of battery cells 11 in the battery pack 100 described above can be one or more. When the battery cells 11 are multiple, the battery cells 11 can be arranged in a preset arrangement to form a battery cell group 10 and installed in the battery tray 20. The explosion-proof valve 12 of the battery cell 11 is located at the bottom of the battery cell 11. When the battery cell 11 is in thermal runaway, the high-temperature smoke is sprayed downward and enters the air inlet 211 of the exhaust member 21 and is then discharged from the exhaust port 212, thereby avoiding the risk of the high-temperature smoke burning upward through the top cover of the battery pack. For example, when the battery pack is applied to a vehicle and the battery pack is arranged below the chassis of the vehicle (i.e., below the passenger compartment), the arrangement position of the explosion-proof valve 12 can avoid the risk of the high-temperature smoke entering the passenger compartment after burning upward through the top cover of the battery pack 100, thereby causing a personal safety risk to the personnel in the passenger compartment. At the same time, the air inlet 211 and the exhaust port 212 of the exhaust member 21 provided by the present disclosure are at least partially misaligned, which can also reduce the risk of the explosion-proof valve 12 being pierced and causing the battery cell 11 to leak.

[0110] In some optional embodiments, the explosion-proof valve 12 is arranged at the bottom of the battery cell 11 facing the first face 201, and the explosion-proof valve 12 is arranged corresponding to the air inlet 211. The explosion-proof valve 12 is arranged corresponding to the air inlet 211, which can enable the high-temperature smoke discharged from the explosion-proof valve 12 to quickly reach the air inlet 211 and be discharged through the exhaust member 21 when the battery cell 11 is in thermal runaway. Based on the above battery pack, the present disclosure further provides, in a fourth aspect, a power utilization device 200 comprising the battery pack 100 described above and a power utilization device body 260. The battery pack 100 is installed on the power utilization device body 260 and used to supply power to the power utilization device body 260. Alternatively, the power utilization device 200 comprises the battery cell 11 and the exhaust member 21 described above, and the battery cell 11 is carried on the first face 201 of the exhaust member 21.

[0111] Here, the electric device 200 can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like, the electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, an electric airplane toy, and the like, the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, and the like, and the like, and the present disclosure is not limited thereto.

[0112] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details of the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0113] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0114] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. An exhaust member (21) having opposite first and second faces (201, 202), the first face (201) being configured to carry a battery cell (11), the first face (201) being provided with an air inlet (211) configured to communicate with a relief valve (12) of the battery cell (11), the second face (202) being provided with an air outlet (212) in communication with the air inlet (211). wherein A projection of the air inlet (211) on the second face (202) in a direction perpendicular to the first face (201) is at least partially offset from the air outlet (212).

2. The exhaust member (21) of claim 1, internally provided with at least one cavity (213) through which the air inlet (211) communicates with the air outlet (212).

3. The exhaust member (21) of claim 2, comprising an exhaust member body (210) in which the cavity (213) is provided, the cavity (213) being provided with at least one flow guide (27) configured to guide fumes from the air inlet (211) to the air outlet (212).

4. The exhaust member (21) of claim 3, the cavity (213) having opposite first and second cavity walls (2131, 2133), the air inlet (211) penetrating the first face (201) and the first cavity wall (2131), the air outlet (212) penetrating the second face (202) and the second cavity wall (2133). The flow guide (27) is provided on the first cavity wall (2131) and / or the second cavity wall (2133).

5. The exhaust member (21) of claim 4, the at least one cavity (213) comprising a first cavity (2135) in communication with a plurality of air inlets (211) arranged at intervals, adjacent two of the air inlets (211) being configured to communicate with corresponding adjacent two relief valves (12) of battery cells (11). The flow guide (27) comprises a first flow guide (221) provided on the first cavity wall (2131) and located between adjacent two of the air inlets (211).

6. The exhaust member (21) of claim 5, the first flow guide (221) comprising a pair of first flow guide faces (2211) inclined to each other, a spacing between the pair of first flow guide faces (2211) near the second cavity wall (2133) being smaller than a spacing between the pair of first flow guide faces (2211) away from the second cavity wall (2133). One of the pair of first flow guide surfaces (2211) is configured to guide flue gas from one of the two adjacent gas inlets (211) to the gas outlet (212), and the other of the pair of first flow guide surfaces (2211) is configured to guide flue gas from the other of the two adjacent gas inlets (211) to the same gas outlet (212).

7. The exhaust member (21) according to claim 5 or 6, comprising the gas inlet (211) arranged opposite the first flow guide portion (221).

8. The exhaust member (21) according to any one of claims 4-7, wherein the at least one cavity (213) comprises a second cavity (2136) having a plurality of spaced-apart gas outlets (212) communicating therewith. The flow guide portion comprises a second flow guide portion (222) disposed on the second cavity wall (2133), and the second flow guide portion (222) is located between two adjacent gas outlets (212).

9. The exhaust member (21) according to claim 8, wherein the second flow guide portion (222) comprises an inclined pair of second flow guide surfaces (2221), the spacing between the ends of the pair of second flow guide surfaces (2221) closer to the first cavity wall (2131) is smaller than the spacing between the ends of the pair of second flow guide surfaces (2221) farther away from the first cavity wall (2131); one of the pair of second flow guide surfaces (2221) is configured to guide flue gas from the gas inlet (211) to one of the two adjacent gas outlets (212), and the other of the pair of second flow guide surfaces (2221) is configured to guide flue gas from the same gas inlet (211) to the other of the two adjacent gas outlets (212).

10. The exhaust member (21) according to claim 8 or 9, comprising the gas inlet (211) arranged opposite the second flow guide portion (222).

11. The exhaust member (21) according to any one of claims 3-10, wherein the cavity wall of the cavity (213) comprises opposite first and second cavity walls (2131, 2133), and a first side wall (2132) connecting the first and second cavity walls (2131, 2133), the gas inlet (211) penetrates the first face (201) and the first cavity wall (2131), and the gas outlet (212) penetrates the second face (202) and the second cavity wall (2133). The first side wall (2132) is arranged inclined from the gas inlet (211) toward the gas outlet (212) to form the flow guide portion (27).

12. The exhaust member (21) according to claim 11, having at least two of said air inlets (211), the cavity wall of said cavity (213) further comprising a second side wall (2134) connecting said first cavity wall (2131) and said second cavity wall (2133), said second side wall (2134) being arranged opposite said first side wall (2132); said first side wall (2132) being arranged inclined from one of said two air inlets (211) towards said exhaust outlet (212) to form said flow guide portion (27), said second side wall (2134) being arranged inclined from the other of said two air inlets (211) towards said exhaust outlet (212) to form said flow guide portion (27).

13. The exhaust member (21) according to any one of claims 3-12, said flow guide portion (27) being integrally formed with said exhaust member body (210).

14. The exhaust member (21) according to any one of claims 2-13, said air inlets (211) being connected with a sealing member (230) for closing said air inlets (211), said sealing member (230) being openable by the exhaust gas discharged from the explosion vent (12).

15. The exhaust member (21) according to claim 14, said sealing member (230) being provided with a lower recess (231), a periphery of said sealing member (230) being connected to said first face (201), said lower recess (231) being located within said air inlets (211).

16. The exhaust member (21) according to claim 15, a side of said lower recess (231) towards said second face (202) being connected with a heat insulating member (240), said heat insulating member (240) being adapted to insulate heat between said lower recess (231) and said cavity (213).

17. The exhaust member (21) according to any one of claims 1-16, said second face (202) being provided with a protective net (250) for blocking external objects from entering said exhaust outlet (212).

18. The exhaust member (21) according to any one of claims 1-17, in a direction perpendicular to said first face (201), an outer contour of a projection of said air inlets (211) on said second face (202) is spaced apart from an outer contour of said exhaust outlet (212).

19. The exhaust member (21) according to any one of claims 1-17, in a direction perpendicular to said first face (201), an outer contour of a projection of said air inlets (211) on said second face (202) is contiguous with an outer contour of said exhaust outlet (212).

20. The exhaust member (21) according to any one of claims 1-17, in a direction perpendicular to said first face (201), an outer contour of a projection of said air inlets (211) on said second face (202) intersects an outer contour of said exhaust outlet (212).

21. The exhaust member (21) according to claim 20, wherein a projection of the air inlet (211) on the second face (202) deviates from a center of the air outlet (212) in a direction perpendicular to the first face (201).

22. A battery tray (20) comprising a bottom plate (28) and the exhaust member (21) according to any one of claims 1-21, wherein the exhaust member (21) is mounted to an inner side of the bottom plate (28), or wherein the exhaust member (21) is configured as the bottom plate (28).

23. The battery tray (20) according to claim 22, further comprising a guard plate (22) located at an outer side of the bottom plate (28), wherein the guard plate (22) is spaced apart from the bottom plate (28) to form an exhaust passage (25) between the guard plate (22) and the second face (202), and wherein the exhaust passage (25) is in communication with the air outlet (212).

24. The battery tray (20) according to claim 23, wherein a support member (24) is provided between the guard plate (22) and the bottom plate (28), and wherein the support member (24), the bottom plate (28) and the guard plate (22) collectively define the exhaust passage (25).

25. The battery tray (20) according to claim 23 or 24, further comprising a frame (23) provided on the bottom plate (28) and an exhaust valve (26) provided on the frame (23), wherein the exhaust valve (26) is in communication with the exhaust passage (25).

26. A battery pack (100) comprising a battery cell (11) and the battery tray (20) according to any one of claims 22-25, wherein the battery cell (11) is carried by the first face (201) of the exhaust member (21), and wherein an explosion-proof valve (12) of the battery cell (11) is in communication with the air inlet (211).

27. The battery pack (100) according to claim 26, wherein the explosion-proof valve (12) is provided at a bottom of the battery cell (11) facing the first face (201), and wherein the explosion-proof valve (12) is provided in correspondence with the air inlet (211).

28. An electric device (200) comprising an electric device body (260) and the battery pack (100) according to claim 26 or 27, wherein the battery pack (100) is mounted to the electric device body (260) and configured to supply power to the electric device body (260), or wherein the battery pack (100) comprises a battery cell (11) and the exhaust member (21) according to any one of claims 1-21, wherein the battery cell (11) is carried by the first face (201) of the exhaust member (21). ​ ​

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