Battery pack tray, battery pack and vehicle

Abstract

This application provides a battery pack tray, a battery pack, and a vehicle. The tray includes: a base plate, comprising an upper surface and a lower surface disposed opposite each other along the thickness direction, the upper surface supporting the battery cells of the battery pack; the base plate has a guide hole extending through the base plate along its thickness direction. A guide assembly includes multiple guide elements disposed on the lower surface of the base plate, forming an exhaust channel, which communicates with the guide hole. This allows the airflow released from the explosion-proof valve after thermal runaway of the battery cells to enter the exhaust channel through the guide hole and then be orderly discharged from the battery pack along the exhaust channel, achieving targeted protection of the airflow location. The guide assembly also acts as a barrier, preventing the gas discharged from the explosion-proof valve from damaging other components, improving the safety of the explosion-proof valve depressurization process after thermal runaway of the battery cells, achieving directional flow guidance, reducing the impact of runaway battery cell airflow on other battery cells, reducing the risk of heat spread, and improving the performance and service life of the battery module.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a battery pack tray, a battery pack, and a vehicle. Background Technology

[0002] As the core power supply component of electric vehicles, the proper functioning of the battery module is fundamental to the normal operation of the vehicle. The explosion-proof valve of the battery module is located at the bottom of the battery cell. Currently, the bottom plate of the battery pack is typically designed without flow guidance or obstruction. In the event of thermal runaway of the battery cell, the disorderly discharge of airflow from the explosion-proof valve is detrimental to targeted protection of the airflow location and can also cause the discharged gas to damage other components, thereby affecting the performance and lifespan of the battery module. Utility Model Content

[0003] This application provides a battery pack tray, a battery pack, and a vehicle to solve the problems in the prior art.

[0004] In a first aspect, embodiments of this application provide a tray for a battery pack, comprising:

[0005] The base plate includes an upper surface and a lower surface that are disposed opposite to each other along the thickness direction. The upper surface of the base plate is used to support the cells of the battery pack. The base plate is provided with a flow guide hole that penetrates the base plate along the thickness direction.

[0006] The flow guiding assembly includes multiple flow guiding elements, which are disposed on the lower surface of the base plate and form an exhaust channel, which is connected to the flow guiding hole.

[0007] Optionally, the exhaust channel includes a first exhaust channel and a second exhaust channel; the first exhaust channel is connected to the guide hole, and the second exhaust channel is connected to the first exhaust channel;

[0008] The flow guiding assembly includes a first flow guiding assembly, which includes a first flow guiding member. The first flow guiding member is semi-closed ring-shaped and has a notch on the side. The first flow guiding member is disposed on the lower surface of the bottom plate corresponding to the position of the flow guiding hole. The first flow guiding member surrounds and forms the first exhaust channel.

[0009] The flow guiding assembly further includes a second flow guiding assembly, which includes a second flow guiding member disposed on the lower surface of the base plate. The notch of the first flow guiding member faces the second flow guiding member. The second flow guiding member encloses and forms the second exhaust channel.

[0010] Optionally, the first flow guiding assembly further includes two third flow guiding elements, respectively disposed on both sides of the notch; the first flow guiding element and the two third flow guiding elements form the first exhaust channel.

[0011] Optionally, the notch is located on one side of the first guide member along the first direction;

[0012] Two third flow guides are spaced apart on both sides of the notch along the second direction. The third flow guides extend along the first direction, and the second flow guides extend along the second direction. The first direction is perpendicular to the second direction, and both are perpendicular to the thickness direction of the base plate.

[0013] Optionally, the guide holes are arranged in multiple rows at intervals along the first direction, and each row includes a plurality of guide holes arranged at intervals along the second direction;

[0014] The first flow guiding component is in multiple columns, the number of which corresponds to the number of columns of the flow guiding holes, and is arranged at intervals along the first direction corresponding to the arrangement of the multiple columns of the flow guiding holes. Each column includes multiple first flow guiding components arranged at intervals along the second direction corresponding to the position of the flow guiding holes. The notch directions of the first flow guiding components located in the same column are the same, and the notch directions of the first flow guiding components in two adjacent columns of the first flow guiding components are opposite.

[0015] There are multiple second flow guides, the number of which corresponds to the number of columns of the first flow guide assembly, and they are arranged at intervals along the first direction; the notches of the first flow guides located in the same column face the same second flow guide.

[0016] Optionally, it also includes multiple rows of reinforcing structures, each row of which includes multiple reinforcing ribs arranged along the second direction, the reinforcing ribs being disposed downwardly on the lower surface of the base plate; a row of the reinforcing structures is provided between two adjacent second guide members.

[0017] Optional, also includes:

[0018] A frame is provided around the periphery of the base plate; a portion of the frame protrudes upward from the base plate and forms an installation space for installing battery cells with the base plate enclosure; another portion of the frame protrudes downward from the base plate and has a battery pack vent.

[0019] A bottom protective plate is connected to the bottom of the frame and located below the bottom plate; the first guide member and the bottom protective plate form the first exhaust channel, the second guide member and the bottom protective plate form the second exhaust channel, one end of the second exhaust channel is connected to the first exhaust channel, and the other end is connected to the battery pack exhaust port.

[0020] Optional, also includes:

[0021] A frame is provided around the periphery of the base plate; a portion of the frame protrudes upward from the base plate and forms an installation space for installing battery cells with the base plate enclosure; another portion of the frame protrudes downward from the base plate and has a battery pack vent.

[0022] A bottom guard plate is connected to the bottom of the frame and located below the bottom plate; multiple flow guides and the bottom guard plate form the exhaust channel, one end of the exhaust channel is connected to the flow guide hole, and the other end is connected to the battery pack exhaust port.

[0023] Optionally, there is a gap between the bottom guard plate and the bottom plate; the guide member is a rib, which is protruding downward on the lower surface of the bottom plate and abuts against the bottom guard plate; or

[0024] The bottom guard plate is fitted to the bottom plate; the guide member is a groove that is recessed upward on the lower surface of the bottom plate.

[0025] Secondly, embodiments of this application provide a battery pack, including a battery box and a battery module. The battery box includes a top cover and a tray as described in the first aspect. The battery module is disposed on the tray, and the top cover is disposed on the tray. The battery module includes a battery cell, and an explosion-proof valve is provided at the bottom of the battery cell. The explosion-proof valve corresponds to the position of the flow guide hole.

[0026] Thirdly, embodiments of this application provide a vehicle including the battery pack described in the second aspect.

[0027] The battery pack tray provided in this application, through a structural design that adds guide holes and guide components to the base plate, allows the airflow released from the explosion-proof valve after thermal runaway of the battery cells to enter the exhaust channel through the guide holes, and then be orderly discharged from the battery pack along the exhaust channel, achieving targeted protection of the airflow location. The guide components also act as a barrier, preventing the gas discharged from the explosion-proof valve from damaging other components, improving the safety of the explosion-proof valve pressure relief process after thermal runaway of the battery cells, achieving directional airflow, reducing the impact of runaway cell airflow on other cells, reducing the risk of thermal spread, and improving the performance and service life of the battery module. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a battery pack tray provided in one embodiment of this application.

[0029] Figure 2 This is a bottom view schematic diagram of a tray with the bottom guard removed, provided in one embodiment of this application.

[0030] Figure 3 and Figure 4 yes Figure 2 A magnified view of a portion of the image.

[0031] Figure 5 This is a side sectional view of a battery pack provided in one embodiment of this application. Detailed Implementation

[0032] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0033] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0034] This application provides a battery pack tray, a battery pack, and a vehicle. The battery pack tray, battery pack, and vehicle of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0035] See Figures 1 to 5 As shown, this application embodiment provides a battery pack tray 100, including a base plate 10 and a flow guiding assembly 20. Combined with... Figure 5 As shown, the battery pack may include a battery module, the battery module includes a battery cell 50, and the bottom of the battery cell 50 is provided with an explosion-proof valve 51.

[0036] The base plate 10 includes an upper surface and a lower surface arranged opposite each other along its thickness direction. The upper surface of the base plate 10 is used to support the battery cells of the battery pack. The base plate 10 has a flow guide hole 11, the position of which corresponds to the position of the explosion-proof valve 51 of the battery cell 50. The flow guide hole 11 penetrates the base plate 10 along its thickness direction. Figure 5 The longitudinal direction of the flow guide assembly 20 includes multiple flow guide elements 21, which are disposed on the lower surface of the base plate 10 and form an exhaust channel 22. The exhaust channel 22 communicates with the flow guide hole 11, and the flow direction of the exhaust channel 22 is as follows: Figure 2 As indicated by the longitudinal arrow in the middle. It can be understood that the battery module of the battery pack is mounted on the base plate 10, and the upper surface of the base plate 10 supports the battery cells of the battery module.

[0037] The battery pack tray 100 provided in this application, through the structural design of adding a guide hole 11 and a guide assembly 20 to the base plate 10, enables the airflow released from the explosion-proof valve 51 after thermal runaway of the battery cell 50 to enter the exhaust channel 22 through the guide hole 11, and then be orderly discharged from the battery pack along the exhaust channel 22, achieving directional airflow and targeted protection for the airflow location. The guide assembly 20 also acts as a barrier, preventing the gas discharged from the explosion-proof valve 51 from damaging other components, improving the safety of the explosion-proof valve 51 pressure relief process after thermal runaway of the battery cell 50, reducing the impact of runaway battery cell airflow on other battery cells, reducing the risk of heat spread, and improving the performance and service life of the battery module.

[0038] Combination Figures 2 to 4 As shown, in some optional embodiments, the exhaust passage 22 includes a first exhaust passage 221 and a second exhaust passage 222. The first exhaust passage 221 communicates with the guide hole 11, and the second exhaust passage 222 communicates with the first exhaust passage 221. The flow direction of the first exhaust passage 221 is as follows: Figure 3 and Figure 4 As shown by the horizontal arrow in the middle, the flow direction of the second exhaust channel 222 is as follows: Figure 3 and Figure 4 As shown by the arrow along the vertical direction.

[0039] The flow guiding assembly 20 includes a first flow guiding assembly, which includes a first flow guiding element 211. The first flow guiding element 211 is semi-closed annular and has a notch 2111 on its side. Figure 3 and Figure 4 The first guide member 211 is located on the side of the first guide member 211 in the lateral direction. The first guide member 211 is disposed on the lower surface of the bottom plate 10 corresponding to the position of the guide hole 11, and the first guide member 211 surrounds and forms the first exhaust channel 221.

[0040] The flow guiding assembly 20 also includes a second flow guiding assembly, which includes a second flow guiding member 212. The second flow guiding member 212 is disposed on the lower surface of the base plate 10, and the notch 2111 of the first flow guiding member 211 faces the second flow guiding member 212. The second flow guiding member 212 encloses and forms a second exhaust channel 222.

[0041] In this way, after thermal runaway of cell 50, the airflow released from the explosion-proof valve 51 enters the first exhaust channel 221 through the guide hole 11, then enters the second exhaust channel 222 from the first exhaust channel 221, and then is orderly discharged from the battery pack along the second exhaust channel 222, achieving directional airflow and targeted protection of the airflow location. The first guide component 211 and the second guide component 212 also play a blocking role, preventing the gas discharged from the explosion-proof valve 51 from damaging other components, improving the safety of the pressure relief process of the explosion-proof valve 51 after thermal runaway of cell 50, achieving directional airflow, reducing the impact of runaway cell airflow on other cells, reducing the risk of thermal spread, and improving the performance and service life of the battery module.

[0042] In some optional embodiments, the first flow guiding assembly further includes two third flow guiding elements 213, respectively disposed on both sides of the notch 2111. The first flow guiding element 211 and the two third flow guiding elements 213 enclose and form a first exhaust channel 221. It can be understood that a first flow guiding assembly includes one first flow guiding element 211 and two third flow guiding elements 213. In this way, the third flow guiding elements 213 can extend the first exhaust channel 221 laterally outward from the flow guiding hole 11, thereby improving the flowability of the gas.

[0043] Combination Figures 2 to 4 As shown, in some optional embodiments, the notch 2111 is located on one side of the first guide member 211 along the first direction. Two third guide members 213 are spaced apart on both sides of the notch 2111 along the second direction, with the third guide members 213 extending along the first direction and the second guide members 212 extending along the second direction. The first direction and the second direction are perpendicular, and both are perpendicular to the thickness direction of the base plate 10. In this embodiment, the first direction is transverse, and the second direction is longitudinal.

[0044] In this way, after thermal runaway of cell 50, the airflow released from the explosion-proof valve 51 enters the first exhaust channel 221 through the guide hole 11, then enters the second exhaust channel 222 laterally from the first exhaust channel 221, and then is orderly discharged from the battery pack longitudinally along the second exhaust channel 222, achieving directional airflow and targeted protection of the airflow location. The first guide component 211 and the second guide component 212 also play a blocking role, preventing the gas discharged from the explosion-proof valve 51 from damaging other components, improving the safety of the pressure relief process of the explosion-proof valve 51 after thermal runaway of cell 50, achieving directional airflow, reducing the impact of runaway cell airflow on other cells, reducing the risk of thermal spread, and improving the performance and service life of the battery module.

[0045] In some optional embodiments, the guide holes 11 are arranged in multiple rows at intervals along a first direction, and each row includes a plurality of guide holes 11 arranged at intervals along a second direction. It is understood that the row direction is the same as the second direction, i.e. Figures 2 to 4 The vertical direction in the middle.

[0046] The first flow guiding assembly consists of multiple rows, the number corresponding to the number of rows of flow guiding holes 11, and is arranged at intervals along a first direction corresponding to the arrangement of the multiple rows of flow guiding holes 11. Each row includes multiple first flow guiding assemblies arranged at intervals along a second direction corresponding to the positions of the flow guiding holes 11. Each first flow guiding assembly includes one first flow guiding element 211 and two third flow guiding elements 213. Figure 3 and Figure 4 As shown, the notches 2111 of the first flow guides 211 in the same column have the same direction, while the notches 2111 of the first flow guides 211 in adjacent columns have opposite directions. This ensures that the airflow flows in the direction of the horizontal arrow and cannot flow in the opposite direction, preventing the airflow from affecting other cells.

[0047] There are multiple second flow guides 212, the number of which corresponds to the number of columns of the first flow guide components, and they are arranged at intervals along the first direction. The notches 2111 of the first flow guides 211 located in the same column face the same second flow guide 212. In this way, the first exhaust channels 221 formed by the first flow guide components in the same column are all connected to the second exhaust channels 222 formed by the same second flow guide 212, realizing directional flow guidance.

[0048] In this embodiment, the two adjacent columns of first current guiding components are arranged in an alternating manner according to the arrangement of each battery cell and the arrangement of the explosion-proof valve.

[0049] In some alternative embodiments, the tray 100 may further include multiple rows of reinforcing structures 40, each row of reinforcing structures 40 including multiple reinforcing ribs 41 arranged along a second direction, the reinforcing ribs 41 being downwardly protruding from the lower surface of the base plate 10. A row of reinforcing structures 40 is provided between two adjacent second guide members 212. The reinforcing ribs 41 can improve the structural strength of the base plate 10.

[0050] It should be noted that the width and thickness of the reinforcing rib 41 can be adjusted according to the weight of the battery cell it supports and the requirements for mechanical performance and service life. The height of the reinforcing rib 41 along the thickness direction of the base plate 10 provides strength to the battery pack and can effectively resist the intrusion of external forces at the bottom of the battery pack, protecting the safety of the battery cells inside the pack.

[0051] In some alternative embodiments, the tray 100 also includes a frame 31 and a bottom guard plate 32. Combined Figure 1 As shown, the frame 31 surrounds the periphery of the base plate 10. A portion of the frame 31 protrudes upward from the base plate 10, forming a mounting space 33 with the base plate 10 for mounting the battery cell 50. Figure 2 and Figure 5 As shown, another part of the frame 31 protrudes downward from the base plate 10 and has a battery pack vent 34. Figure 2As shown, in this embodiment, the bottom side of the frame 31 is provided with two battery pack exhaust ports 34.

[0052] The bottom guard plate 32 is connected to the bottom of the frame 31 and is located below the bottom plate 10, serving to protect the bottom plate 10. Multiple air guides 21 and the bottom guard plate 32 form an exhaust channel 22, one end of which is connected to the air guide hole 11 and the other end is connected to the battery pack exhaust port 34.

[0053] In this embodiment, the first guide member 211 and the bottom guard plate 32 form a first exhaust channel 221, and the second guide member 212 and the bottom guard plate 32 form a second exhaust channel 222. One end of the second exhaust channel 222 is connected to the first exhaust channel 221, and the other end is connected to the battery pack exhaust port 34.

[0054] In this way, after the thermal runaway of the battery cell 50, the airflow released from the explosion-proof valve 51 enters the first exhaust channel 221 through the guide hole 11, then enters the second exhaust channel 222 laterally from the first exhaust channel 221, and then flows longitudinally along the second exhaust channel 222 towards the battery pack exhaust port 34. This guides the airflow to be discharged from the battery pack exhaust port 34 in an orderly manner, achieving directional airflow guidance, providing targeted protection for the airflow position, and preventing most of the smoke from contacting the surrounding battery cell explosion-proof valves.

[0055] Combination Figure 5 As shown, in some alternative embodiments, there is a gap between the bottom guard plate 32 and the bottom plate 10. The guide member 21 is a rib that is convexly disposed on the lower surface of the bottom plate 10 and abuts against the bottom guard plate 32, thereby separating an exhaust channel for the airflow of the explosion-proof valve 51 within the gap.

[0056] In other embodiments, the bottom guard plate 32 is fitted to the bottom plate 10. The guide member 21 is a groove, recessed upward on the lower surface of the bottom plate 10, directly forming an exhaust channel for the airflow of the explosion-proof valve 51.

[0057] This application embodiment also provides a battery pack, including a battery box and a battery module. The battery box includes a top cover and a tray 100 as described in the above embodiments and implementations. The battery module is disposed on the tray 100, and the top cover is disposed on the tray 100. The battery module includes a battery cell 50, which is disposed on a base plate 10. The upper surface of the base plate 10 supports the battery cell 50. An explosion-proof valve 51 is provided at the bottom of the battery cell 50, and the explosion-proof valve 51 corresponds to the position of the guide hole 11 of the base plate 10.

[0058] After thermal runaway of cell 50, the gas released from explosion-proof valve 51 can enter exhaust channel 22 through guide hole 11, and then be orderly discharged from battery pack along exhaust channel 22, achieving directional flow guidance and targeted protection of the gas flow location. The guide component 20 also acts as a barrier, preventing the gas discharged from explosion-proof valve 51 from damaging other components, improving the safety of the pressure relief process of explosion-proof valve 51 after thermal runaway of cell 50, reducing the impact of runaway cell gas flow on other cells, reducing the risk of heat spread, and improving the performance and service life of battery module.

[0059] This application also provides a vehicle that includes the battery pack described in the above embodiments and implementations.

[0060] After thermal runaway of cell 50, the gas released from explosion-proof valve 51 can enter exhaust channel 22 through guide hole 11, and then be orderly discharged from battery pack along exhaust channel 22, achieving directional flow guidance and targeted protection of the gas flow location. The guide component 20 also acts as a barrier, preventing the gas discharged from explosion-proof valve 51 from damaging other components, improving the safety of the pressure relief process of explosion-proof valve 51 after thermal runaway of cell 50, reducing the impact of runaway cell gas flow on other cells, reducing the risk of heat spread, and improving the performance and service life of battery module.

[0061] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A tray for a battery pack, characterized in that, include: The base plate includes an upper surface and a lower surface that are disposed opposite to each other along the thickness direction. The upper surface of the base plate is used to support the cells of the battery pack. The base plate is provided with a flow guide hole that penetrates the base plate along the thickness direction. The flow guiding assembly includes multiple flow guiding elements, which are disposed on the lower surface of the base plate and form an exhaust channel, which is connected to the flow guiding hole.

2. The battery pack tray according to claim 1, characterized in that, The exhaust channel includes a first exhaust channel and a second exhaust channel; the first exhaust channel is connected to the guide hole, and the second exhaust channel is connected to the first exhaust channel; The flow guiding assembly includes a first flow guiding assembly, which includes a first flow guiding member. The first flow guiding member is semi-closed ring-shaped and has a notch on the side. The first flow guiding member is disposed on the lower surface of the bottom plate corresponding to the position of the flow guiding hole. The first flow guiding member surrounds and forms the first exhaust channel. The flow guiding assembly further includes a second flow guiding assembly, which includes a second flow guiding member disposed on the lower surface of the base plate. The notch of the first flow guiding member faces the second flow guiding member. The second flow guiding member encloses and forms the second exhaust channel.

3. The battery pack tray according to claim 2, characterized in that, The first flow guiding component further includes two third flow guiding elements, which are respectively disposed on both sides of the notch; the first flow guiding element and the two third flow guiding elements form the first exhaust channel.

4. The tray of the battery pack according to claim 3, characterized in that, The notch is located on one side of the first guide member along the first direction; Two third flow guides are spaced apart on both sides of the notch along the second direction. The third flow guides extend along the first direction, and the second flow guides extend along the second direction. The first direction is perpendicular to the second direction, and both are perpendicular to the thickness direction of the base plate.

5. The tray of the battery pack according to claim 4, characterized in that, The flow guide holes are arranged in multiple rows at intervals along the first direction, and each row includes a plurality of flow guide holes arranged at intervals along the second direction; The first flow guiding component is in multiple columns, the number of which corresponds to the number of columns of the flow guiding holes, and is arranged at intervals along the first direction corresponding to the arrangement of the multiple columns of the flow guiding holes. Each column includes multiple first flow guiding components arranged at intervals along the second direction corresponding to the position of the flow guiding holes. The notch directions of the first flow guiding components located in the same column are the same, and the notch directions of the first flow guiding components in two adjacent columns of the first flow guiding components are opposite. There are multiple second flow guides, the number of which corresponds to the number of columns of the first flow guide assembly, and they are arranged at intervals along the first direction; the notches of the first flow guides located in the same column face the same second flow guide.

6. The tray of the battery pack according to claim 5, characterized in that, It also includes multiple rows of reinforcing structures, each row of which includes multiple reinforcing ribs arranged along the second direction, the reinforcing ribs being arranged downwardly on the lower surface of the base plate; a row of the reinforcing structures is provided between two adjacent second guide members.

7. The tray of the battery pack according to claim 2, characterized in that, Also includes: A frame is provided around the periphery of the base plate; a portion of the frame protrudes upward from the base plate and forms an installation space for installing battery cells with the base plate enclosure; another portion of the frame protrudes downward from the base plate and has a battery pack vent. A bottom protective plate is connected to the bottom of the frame and located below the bottom plate; the first guide member and the bottom protective plate form the first exhaust channel, the second guide member and the bottom protective plate form the second exhaust channel, one end of the second exhaust channel is connected to the first exhaust channel, and the other end is connected to the battery pack exhaust port.

8. The tray of the battery pack according to claim 1, characterized in that, Also includes: A frame is provided around the periphery of the base plate; a portion of the frame protrudes upward from the base plate and forms an installation space for installing battery cells with the base plate enclosure; another portion of the frame protrudes downward from the base plate and has a battery pack vent. A bottom guard plate is attached to the bottom of the frame and located below the bottom plate; The plurality of the flow guides and the bottom protective plate form the exhaust channel, one end of the exhaust channel is connected to the flow guide hole, and the other end is connected to the battery pack exhaust port.

9. The tray of the battery pack according to claim 7 or 8, characterized in that, There is a gap between the bottom protective plate and the bottom plate; the flow guide is a rib, which is protruding downward on the lower surface of the bottom plate and abuts against the bottom protective plate; or The bottom guard plate is fitted to the bottom plate; the guide member is a groove that is recessed upward on the lower surface of the bottom plate.

10. A battery pack, characterized in that, The device includes a battery box and a battery module. The battery box includes a top cover and a tray as described in any one of claims 1-9. The battery module is disposed on the tray, and the top cover is disposed on the tray. The battery module includes a battery cell, and an explosion-proof valve is provided at the bottom of the battery cell. The explosion-proof valve corresponds to the position of the flow guide hole.

11. A vehicle, characterized in that, Includes the battery pack as described in claim 10.

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