Battery pack and vehicle

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a battery pack and a vehicle. The utility model aims to solve the problem of large occupied space in the Z direction of the battery pack in the related technology. According to the battery pack, a bottom plate assembly comprises a main plate body and a partition plate body, the main plate body and a bottom protection plate are oppositely arranged, the partition plate body divides the main plate body into a first plate body and a second plate body, the first plate body corresponds to a battery cell module, a plurality of first exhaust holes are formed in the first plate body, and a first smoke exhaust channel is defined by the main plate body, the bottom protection plate and a frame; a second smoke exhaust channel is defined by the partition plate body, the second plate body, the frame and the upper cover, the second smoke exhaust channel is communicated with the pressure relief hole, and the second smoke exhaust channel and the first exhaust hole are both communicated with the first smoke exhaust channel. The main plate body can be arranged to be a single-layer plate, so that the thickness of the main plate body in the Z direction is reduced, and the space occupied by the battery pack in the Z direction is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of power batteries, and in particular to a battery pack and a vehicle. Background Art

[0002] As the core power supply component of electric vehicles, battery packs determine key indicators such as driving range, cost, service life, safety, and maintainability of electric vehicles. Battery packs generate a lot of heat during rapid charging and rapid discharging. If the generated heat cannot be dissipated quickly and effectively, the accumulation of heat may cause safety accidents such as battery heating, fire, and explosion.

[0003] In the related art, in order to increase the strength of the bottom plate of the battery pack, the bottom plate is designed as a double-layer plate with a hollow cavity, which results in the problem that the battery pack occupies a large space in the Z direction. Utility Model Content

[0004] In view of this, the main purpose of the embodiments of the present application is to provide a battery pack and a vehicle to solve the technical problem that the battery pack occupies a large space in the Z direction.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a battery pack, including a tray and a battery cell module, the tray including a frame, a bottom guard plate and a bottom plate assembly, the frame is configured with a pressure relief hole, the bottom guard plate is closed on one side of the frame, the bottom plate assembly is arranged in the frame, the bottom plate assembly includes a main board body and a partition plate body, the main board body is arranged opposite to the bottom guard plate, the partition plate body is connected to the side of the main board body away from the bottom guard plate, and the partition plate body divides the main board body into a first plate body and a second plate body, the first plate body is configured with a plurality of first exhaust holes, and the first exhaust holes are connected to the pressure relief holes; the battery cell module is arranged in a space enclosed by the first plate body, the partition plate body and the frame, and the plurality of first exhaust holes and the battery cell explosion-proof valves arranged on the battery cell module are arranged one by one.

[0006] In some embodiments that may include the above embodiments, the main board is a single-layer board.

[0007] In some embodiments that may include the above-mentioned embodiments, the main body, the bottom guard plate and the frame are arranged to form a first smoke exhaust channel, the partition plate body, the second plate body and the frame are arranged to form a second smoke exhaust channel, the second smoke exhaust channel is connected to the pressure relief hole, and the second smoke exhaust channel and the first exhaust hole are both connected to the first smoke exhaust channel.

[0008] In some embodiments that may include the above embodiments, the second plate body is configured with a second exhaust hole, and the first smoke exhaust channel and the second smoke exhaust channel are connected through the second exhaust hole.

[0009] In some embodiments that may include the above-mentioned embodiments, a side of the main board body facing the bottom guard plate is constructed with a plurality of reinforcing ribs arranged at intervals along a first direction, an extension direction of the reinforcing ribs is parallel to a second direction, and the reinforcing ribs abut against the bottom guard plate; the reinforcing ribs are constructed with a plurality of smoke passages, and the plurality of smoke passages are arranged along the second direction.

[0010] Optionally, the smoke passage is arranged close to the first exhaust hole.

[0011] In some embodiments that may include the above-mentioned embodiments, a side of the bottom guard plate facing the main board body is constructed with a plurality of first dividing ribs arranged at intervals along the first direction, the extension direction of the first dividing ribs is parallel to the second direction, the projection of the first dividing ribs on the main board body is located outside the first exhaust hole, the first dividing ribs are arranged at intervals between the first dividing ribs and the main board body, and the plurality of first dividing ribs and the plurality of reinforcing ribs divide the first smoke exhaust channel into a plurality of smoke exhaust branches arranged along the first direction.

[0012] In some embodiments that may include the above-mentioned embodiments, a plurality of second dividing ribs arranged at intervals along the first direction are constructed on the side of the main board body facing the bottom guard plate, the extension direction of the second dividing ribs is parallel to the second direction, the projection of the second dividing rib on the main board body is located outside the first exhaust hole, the projection of the second dividing rib on the bottom guard plate is located outside the first dividing rib, the second dividing rib and the bottom guard plate are arranged at intervals, and the plurality of the first dividing ribs, the plurality of the reinforcing ribs and the plurality of the second dividing ribs divide the first smoke exhaust channel into a plurality of smoke exhaust branches arranged along the first direction.

[0013] In some embodiments that may include the above-mentioned embodiments, the two ends of the main board body along the second direction are spaced apart from the frame, and a smoke collecting channel is enclosed between the two ends of the main board body along the second direction, the frame and the bottom guard plate, the smoke collecting channel is connected to the second smoke exhaust channel, and the plurality of smoke exhaust branches are all connected to the smoke collecting channel.

[0014] In some embodiments that may include the above embodiments, a first connecting hole is opened on the bottom guard plate, a second connecting hole is opened on the reinforcing rib, and the bottom guard plate and the main board body are connected by fasteners passing through the first connecting hole and the second connecting hole.

[0015] An embodiment of the present application also provides a vehicle, comprising the battery pack in the above embodiment.

[0016] The battery pack and vehicle provided in the embodiments of the present application, the tray of the battery pack includes a frame, a bottom plate assembly and a bottom guard plate, the bottom guard plate is closed on the side of the frame facing away from the upper cover, and the bottom plate assembly is arranged between the battery module and the bottom guard plate; the frame is structured with a pressure relief hole; the bottom plate assembly includes a main board body and a partition plate body, the main board body and the bottom guard plate are arranged opposite to each other, the partition plate body is connected to the side of the main board body facing away from the bottom guard plate, and the partition plate body divides the main board body into a first plate body and a second plate body, the first plate body corresponds to the battery module, the first plate body is structured with a plurality of first exhaust holes, the plurality of first exhaust holes and the battery explosion-proof valves arranged on the battery module are arranged one by one, the main board body, the bottom guard plate and the frame are arranged to form a first smoke exhaust channel, the partition plate body, the second plate body, the frame and the upper cover are arranged to form a second smoke exhaust channel, the second smoke exhaust channel is connected to the pressure relief hole, and the second smoke exhaust channel and the first exhaust holes are both connected to the first smoke exhaust channel. When the battery cell has thermal runaway, the gas generated is ejected from the battery cell explosion-proof valve, enters the first exhaust channel through the first exhaust hole, and then enters the second exhaust channel, and finally is discharged from the pressure relief hole to the external environment of the battery pack to dissipate heat for the battery pack. In the battery pack of this embodiment, the main board body can be set as a single-layer board, so that the thickness of the main board body along the Z direction is small, thereby reducing the space occupied by the battery pack along the Z direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of the battery pack provided in the embodiment of the present application Figure 1 ;

[0019] Figure 2 Schematic diagram of the structure of the battery pack provided in the embodiment of the present application Figure 2 ;

[0020] Figure 3 Schematic diagram of the structure of the battery pack provided in the embodiment of the present application Figure 3 ;

[0021] Figure 4 Schematic diagram of the structure of the battery pack provided in the embodiment of the present application Figure 4 ;

[0022] Figure 5 A top view of a battery pack provided in an embodiment of the present application;

[0023] Figure 6 for Figure 5 Sectional view along AA direction;

[0024] Figure 7 for Figure 6 The enlarged schematic diagram of P1 in the middle;

[0025] Figure 8 for Figure 4 The enlarged schematic diagram of P2 in the middle;

[0026] Fig. 9 for Figure 5 Cross-sectional view along the BB direction;

[0027] Fig.10 for Fig. 9 The enlarged schematic diagram of P3 in the middle;

[0028] Fig.11 for Figure 4 A magnified schematic diagram of P4 in the figure.

[0029] Description of reference numerals:

[0030] 10- Upper cover;

[0031] 20-battery cell module;

[0032] 210-battery cell; 211-battery cell explosion-proof valve;

[0033] 30-Pallets;

[0034] 310-framework;

[0035] 320-bottom plate assembly; 321-main board body;

[0036] 3211-first plate; 3212-second plate;

[0037] 3213-first exhaust hole; 3214-reinforcement rib;

[0038] 3215-smoke passage; 3216-second dividing rib;

[0039] 3217-second connecting hole; 3218-second exhaust hole;

[0040] 322-separator plate body;

[0041] 330-bottom guard plate; 331-first dividing rib;

[0042] 332-first connecting hole;

[0043] 301-first smoke exhaust channel; 302-second smoke exhaust channel;

[0044] 303-smoke exhaust branch; 304-smoke collection channel;

[0045] X-first direction; Y-second direction;

[0046] ZZ direction. DETAILED DESCRIPTION

[0047] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0048] Secondly, it should be noted that in the description of the embodiments of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0049] In addition, it should be noted that in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] As described in the background technology, the battery pack in the related art has the problem of occupying a large space in the Z direction. The applicant has found through research that the reason for this problem is that in order to increase the strength of the bottom plate in the related technology, the bottom plate is designed as a double-layer plate with a hollow cavity, which leads to an increase in the space occupied by the battery pack in the Z direction.

[0052] In response to the above technical problems, an embodiment of the present application provides a battery pack and a vehicle, in which the main board body can be set as a single-layer board. By setting the main board body as a single-layer board, the thickness of the main board body along the Z direction (the direction perpendicular to the board surface of the main board body) can be reduced, thereby reducing the space occupied by the battery pack along the Z direction.

[0053] The principles and features of the embodiments of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the embodiments of the present application and are not used to limit the scope of the embodiments of the present application.

[0054] refer to Figure 1-Figure 4 The present embodiment provides a battery pack, including an upper cover 10, a battery cell module 20 and a tray 30. The upper cover 10 and the tray 30 are arranged to form a closed accommodating space, and the battery cell module 20 is arranged in the accommodating space.

[0055] The tray 30 includes a frame 310, a bottom plate assembly 320 and a bottom guard plate 330. The bottom guard plate 330 is enclosed on the side of the frame 310 that is away from the upper cover 10. That is, the upper cover 10, the frame 310 and the bottom guard plate 330 form a closed shell. The bottom plate assembly 320 is arranged between the battery cell module 20 and the bottom guard plate 330.

[0056] The battery cell module 20 may include multiple battery cell groups, each battery cell group includes multiple battery cells 210, the multiple battery cells 210 are arranged in sequence along a first direction X, and the multiple battery cell groups are arranged in sequence along a second direction Y. The second direction Y and the first direction X are both parallel to the bottom guard plate 330, and the second direction Y is perpendicular to the first direction X.

[0057] The battery cell 210 includes a battery cell explosion-proof valve 211 and two poles. The two poles are located on a side of the battery cell 210 facing the upper cover 10 , and the battery cell explosion-proof valve 211 is located on a side of the battery cell 210 facing away from the upper cover 10 .

[0058] The bottom plate assembly 320 includes a main plate body 321 and a partition plate body 322. The main plate body 321 is a single-layer plate. The main plate body 321 is arranged opposite to the bottom guard plate 330. The partition plate body 322 is connected to the side of the main plate body 321 facing away from the bottom guard plate 330, and the partition plate body 322 separates the main plate body 321 into a first plate body 3211 and a second plate body 3212. The first plate body 3211 corresponds to the battery cell module 20. The first plate body 3211 is constructed with a plurality of first exhaust holes 3213. The plurality of first exhaust holes 3213 and the plurality of battery cell explosion-proof valves 211 are arranged one by one.

[0059] refer to Figure 5-Figure 7 The main board body 321, the bottom guard plate 330 and the frame 310 are arranged to form a first smoke exhaust channel 301, the partition board body 322, the second board body 3212, the frame 310 and the upper cover 10 are arranged to form a second smoke exhaust channel 302, and the second smoke exhaust channel 302 and the first exhaust hole 3213 are both connected to the first smoke exhaust channel 301.

[0060] The frame 310 is configured with a pressure relief hole (not shown in the figure), and the second smoke exhaust channel 302 is connected to the pressure relief hole.

[0061] The frame 310 may be provided with an explosion-proof valve (not shown in the figure) at the pressure relief hole, and the gas in the second smoke exhaust channel 302 is discharged to the external environment of the battery pack through the explosion-proof valve.

[0062] The gas generated when the battery cell 210 has thermal runaway is ejected from the battery cell explosion-proof valve 211, enters the first smoke exhaust channel 301 through the first exhaust hole 3213, and then enters the second smoke exhaust channel 302, and is finally discharged from the pressure relief hole to the external environment of the battery pack to dissipate heat from the battery pack.

[0063] In the battery pack of this embodiment, the main board body 321 in the bottom plate assembly 320 can be set as a single-layer plate. Compared with the bottom plate with a hollow cavity in the related art, setting the main board body 321 as a single-layer plate can reduce the thickness of the main board body 321 along the Z direction (the direction perpendicular to the plate surface of the main board body 321), thereby reducing the space occupied by the battery pack along the Z direction.

[0064] refer to Figure 2-Figure 4 In some embodiments, the second plate 3212 may be constructed with a second exhaust hole 3218, and the first smoke exhaust channel 301 and the second smoke exhaust channel 302 are connected through the second exhaust hole 3218. The gas in the first smoke exhaust channel 301 flows from the second exhaust hole 3218 to the second smoke exhaust channel 302, and then is discharged from the pressure relief hole to the external environment of the battery pack.

[0065] refer to Figure 2 and Figure 4 In some embodiments, a side of the main board body 321 facing the bottom guard plate 330 may be constructed with a plurality of reinforcing ribs 3214 spaced apart along the first direction X, the reinforcing ribs 3214 are in the shape of straight strips, the extension direction of the reinforcing ribs 3214 is parallel to the second direction Y, and the projection of the reinforcing ribs 3214 on the main board body 321 is located outside the first exhaust hole 3213, so that the reinforcing ribs 3214 do not block the first exhaust hole 3213.

[0066] refer to Figure 7 The reinforcing rib 3214 is in contact with the bottom guard plate 330, and the reinforcing rib 3214 is supported between the main board body 321 and the bottom guard plate 330. On the one hand, a certain gap can be maintained between the main board body 321 and the bottom guard plate 330, so that the first smoke exhaust channel 301 is formed between the main board body 321 and the bottom guard plate 330; on the other hand, the reinforcing rib 3214 can increase the strength of the main board body 321 in the Z direction, and enhance the pressure-bearing capacity of the main board body 321 in the Z direction, so that the main board body 321 is not easily deformed in the Z direction.

[0067] refer to Figure 4 and Figure 8 The reinforcing rib 3214 may be configured with a plurality of smoke passages 3215, and the smoke passages 3215 may be as follows: Figure 8The notch shown is constructed at one end of the reinforcing rib 3214 facing the bottom guard plate 330, and the axis of the notch may be parallel to the first direction X. The smoke passage 3215 may also be a through hole constructed on the reinforcing rib 3214, and the axis of the through hole may be parallel to the first direction X. Multiple smoke passages 3215 are arranged along the second direction Y, and the smoke passages 3215 may connect the first smoke exhaust channels 301 on both sides of the reinforcing rib 3214 along the first direction X, so as to improve the fluidity and flow rate of the gas in the entire first smoke exhaust channel 301 between the main body 321 and the bottom guard plate 330, thereby accelerating the heat dissipation rate of the battery pack.

[0068] refer to Figure 8-Figure 10 Furthermore, the smoke passage 3215 can be arranged close to the first exhaust hole 3213 so that the smoke passage 3215 is close to the battery cell explosion-proof valve 211, so that the heat source from the battery cell explosion-proof valve 211 can quickly flow to the smoke passage 3215, thereby improving the heat dissipation rate of the battery pack.

[0069] refer to Figure 3 and Figure 7 In some embodiments, a side of the bottom guard plate 330 facing the main body 321 may be constructed with a plurality of first dividing ribs 331 spaced apart along the first direction X, the first dividing ribs 331 are in the shape of straight strips, and the extension direction of the first dividing ribs 331 is parallel to the second direction Y. The plurality of first dividing ribs 331 and the plurality of reinforcing ribs 3214 divide the first smoke exhaust channel 301 into a plurality of smoke exhaust branches 303 arranged along the first direction X.

[0070] The projection of the first partition rib 331 on the main body 321 is located outside the first exhaust hole 3213 so that the first partition rib 331 is not directly opposite to the first exhaust hole 3213 , thereby preventing the first partition rib 331 from blocking the gas from the first exhaust hole 3213 .

[0071] The first partition rib 331 is spaced from the main board body 321 so that the smoke exhaust branches 303 on both sides of the first partition rib 331 are connected through the gap between the first partition rib 331 and the main board body 321 to improve the fluidity and flow rate of the gas between the smoke exhaust branches 303, thereby accelerating the heat dissipation rate of the battery pack.

[0072] refer to Figure 2 , Figure 4 and Figure 7In some embodiments, a side of the main body 321 facing the bottom guard plate 330 may be constructed with a plurality of second dividing ribs 3216 spaced apart along the first direction X, the second dividing ribs 3216 are in the shape of straight strips, and the extension direction of the second dividing ribs 3216 is parallel to the second direction Y. The plurality of first dividing ribs 331, the plurality of reinforcing ribs 3214, and the plurality of second dividing ribs 3216 divide the first smoke exhaust channel 301 into a plurality of smoke exhaust branches 303 arranged along the first direction X.

[0073] The projection of the second partition rib 3216 on the main body 321 is located outside the first exhaust hole 3213 to prevent the second partition rib 3216 from blocking the first exhaust hole 3213 .

[0074] The second partition rib 3216 and the bottom guard plate 330 are spaced apart so that the smoke exhaust branches 303 on both sides of the second partition rib 3216 are connected through the gap between the second partition rib 3216 and the bottom guard plate 330 to improve the fluidity and flow rate of the gas between the smoke exhaust branches 303, thereby accelerating the heat dissipation rate of the battery pack.

[0075] The projection of the second partition rib 3216 on the bottom guard plate 330 is located outside the first partition rib 331, that is, the second partition rib 3216 and the first partition rib 331 are not directly opposite to each other, so as to avoid the gap between the first partition rib 331 and the main body 321 and the gap between the second partition rib 3216 and the bottom guard plate 330 being too small, which leads to a decrease in the gas flow rate between adjacent smoke exhaust branches 303.

[0076] In some embodiments, the two ends of the main board body 321 along the second direction Y are spaced apart from the frame 310, and the two ends of the main board body 321 along the second direction Y, the frame 310 and the bottom guard plate 330 are surrounded to form a smoke collecting channel 304 (refer to Fig. 9 and Fig.10 ), the smoke collecting channel 304 is connected to the second smoke exhaust channel 302 , and the multiple smoke exhaust branches 303 are all connected to the smoke collecting channel 304 .

[0077] Part of the gas in the smoke exhaust branch 303 flows into the smoke collecting channel 304 along the second direction Y, and then the gas in the smoke collecting channel 304 flows to the second smoke exhaust channel 302, and finally is discharged from the pressure relief port to the external environment of the battery pack.

[0078] In some embodiments, the bottom guard plate 330 can be connected to the main body 321 by fasteners, for example, refer to Fig.11 The bottom guard plate 330 may be provided with a first connection hole 332, which is a through hole. Figure 8A second connecting hole 3217 may be opened on the reinforcing rib 3214, and the second connecting hole 3217 may be a blind hole with its opening facing the bottom guard plate 330. The bottom guard plate 330 and the main board body 321 are connected by fasteners passing through the first connecting hole 332 and the second connecting hole 3217, wherein the fasteners may be fastening bolts or connecting rivets, etc., as long as they can be passed through the first connecting hole 332 and the second connecting hole 3217 and fix the bottom guard plate 330 and the main board body 321 together.

[0079] Based on the above implementation, an embodiment of the present application also provides a vehicle, including the battery pack provided in the above embodiment.

[0080] The vehicle in this embodiment includes the battery pack in the above embodiment. The specific structure, working principle and function of the battery pack have been described in detail in the above embodiment, and will not be repeated here. For details, please refer to the description of the above embodiment.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A tray, comprising a frame, a bottom guard plate and a bottom plate assembly, wherein the frame is configured with a pressure relief hole, the bottom guard plate is enclosed at one side of the frame, the bottom plate assembly is arranged in the frame, the bottom plate assembly comprises a main plate body and a partition plate body, the main plate body is arranged opposite to the bottom guard plate, the partition plate body is connected to a side of the main plate body away from the bottom guard plate, and the partition plate body divides the main plate body into a first plate body and a second plate body, the first plate body is configured with a plurality of first exhaust holes, and the first exhaust holes are communicated with the pressure relief hole; The battery cell module is arranged in a space surrounded by the first plate body, the partition plate body and the frame, and the plurality of first exhaust holes and the battery cell explosion-proof valves arranged on the battery cell module are arranged in one-to-one correspondence.

2. The battery pack according to claim 1, characterized in that: The main board body is a single-layer board.

3. The battery pack according to claim 1, characterized in that: The main body, the bottom guard plate and the frame are arranged to form a first smoke exhaust channel, the partition plate, the second plate and the frame are arranged to form a second smoke exhaust channel, the second smoke exhaust channel is connected to the pressure relief hole, and the second smoke exhaust channel and the first exhaust hole are both connected to the first smoke exhaust channel.

4. The battery pack according to claim 3, characterized in that: The second plate body is configured with a second exhaust hole, and the first smoke exhaust channel and the second smoke exhaust channel are communicated through the second exhaust hole.

5. The battery pack according to claim 3, characterized in that: A plurality of reinforcing ribs are arranged at intervals along a first direction on one side of the main body facing the bottom guard plate, the extending direction of the reinforcing ribs is parallel to the second direction, and the reinforcing ribs abut against the bottom guard plate; The reinforcing rib is configured with a plurality of smoke passages, and the plurality of smoke passages are arranged along the second direction.

6. The battery pack according to claim 5, characterized in that: The smoke passage is arranged close to the first exhaust hole.

7. The battery pack according to claim 5, characterized in that: A plurality of first dividing ribs spaced apart along the first direction are constructed on one side of the bottom guard plate facing the main board body, the extension direction of the first dividing ribs is parallel to the second direction, the projection of the first dividing ribs on the main board body is located outside the first exhaust hole, the first dividing ribs and the main board body are spaced apart, and the plurality of first dividing ribs and the plurality of reinforcing ribs divide the first smoke exhaust channel into a plurality of smoke exhaust branches arranged along the first direction.

8. The battery pack according to claim 7, characterized in that: A plurality of second dividing ribs spaced apart along the first direction are constructed on one side of the main board body facing the bottom guard plate, the extension direction of the second dividing ribs is parallel to the second direction, the projection of the second dividing rib on the main board body is located outside the first exhaust hole, the projection of the second dividing rib on the bottom guard plate is located outside the first dividing rib, the second dividing rib and the bottom guard plate are spaced apart, and the plurality of the first dividing ribs, the plurality of the reinforcing ribs and the plurality of the second dividing ribs divide the first smoke exhaust channel into a plurality of smoke exhaust branches arranged along the first direction.

9. The battery pack according to claim 7 or 8, characterized in that: The two ends of the main board body along the second direction are spaced apart from the frame, and a smoke collecting channel is formed between the two ends of the main board body along the second direction, the frame and the bottom guard plate. The smoke collecting channel is connected to the second smoke exhaust channel, and the plurality of smoke exhaust branches are all connected to the smoke collecting channel.

10. A vehicle, characterized in that: Comprising a battery pack as described in any one of claims 1 to 9.

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