Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and belongs to the technical field of batteries. The battery pack comprises a frame, a battery cell module and a flow guide part, a pressure relief channel is formed in the frame, the frame is provided with a pressure relief inlet and a pressure relief outlet which are communicated with the pressure relief channel, and the pressure relief outlet is formed in the outer side wall of the frame; a flow guide channel communicated with the pressure relief inlet is formed in the flow guide part, a pressure relief hole communicated with the flow guide channel is formed in the face, facing the anti-explosion valve, of the flow guide part, and at least part of the projection, on the battery cell, of the pressure relief hole coincides with the anti-explosion valve so that the anti-explosion valve and the flow guide channel can be communicated. When high-temperature gas in a battery cell is jetted out from the explosion-proof valve, the high-temperature gas can enter the flow guide channel through the pressure relief hole, enters the pressure relief channel from the pressure relief inlet under the guidance of the flow guide channel, and is finally discharged from the pressure relief outlet in the outer side wall of the frame, so that the high-temperature gas can be prevented from being directly jetted to the direction of a battery pack box cover; and high-temperature gas can be prevented from moving at other positions in the battery pack, so that the safety of the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a vehicle. BACKGROUND

[0002] The battery pack used by the electric vehicle is generally a lithium battery. The lithium battery has a risk of thermal runaway under conditions such as short circuit, overcharge and overdischarge, temperature overrun, and mechanical damage. At present, the explosion-proof valve of the battery cell in the battery pack is mostly directed to the direction of the passenger cabin. When the battery pack has thermal runaway, the toxic high-temperature gas or flame generated in the battery pack is easy to quickly break through the battery pack cover and spread to the passenger cabin, which has a risk of endangering the safety of the passengers.

[0003] In the related art, the explosion-proof valve of the battery cell in the battery pack is directed away from the passenger cabin to reduce the risk of damage to the passengers caused by thermal runaway of the battery pack. However, when the battery pack has thermal runaway, although the toxic high-temperature gas generated by the battery pack is sprayed downward, an upward force is generated on the battery cell in the battery pack. When the force is large, there is a risk that the battery cell will move upward and break through the battery pack cover, i.e., there is still a risk of endangering the safety of the passengers.

[0004] This part provides background information related to the present application, which may not be prior art. Content of the utility model

[0005] The present application aims to solve or at least reduce part or all of the above problems. To this end, the present application aims to provide a battery pack and a vehicle to improve the safety of the battery pack and reduce the risk of endangering the safety of the passengers.

[0006] In order to achieve the above-mentioned target, the present application adopts the following technical solution:

[0007] In a first aspect, the present application provides a battery pack, comprising:

[0008] a frame, which surrounds to form an accommodation space, the accommodation space has an open end at both ends of the height direction of the frame, a pressure relief channel is formed inside the frame, the frame has a pressure relief inlet and a pressure relief outlet connected with the pressure relief channel, and the pressure relief outlet is opened on the outer side wall of the frame;

[0009] a battery cell module, which is installed in the accommodation space, the battery cell module comprises a battery cell, and the explosion-proof valve of the battery cell is directed to any open end of the accommodation space;

[0010] A flow guide member is mounted to the frame, a flow guide channel is formed in the flow guide member and communicates with the pressure relief inlet, and a pressure relief hole that communicates with the flow guide channel is formed on a side of the flow guide member that faces the explosion-proof valve of the battery cell, and a projection of the pressure relief hole on the battery cell at least partially overlaps the explosion-proof valve;

[0011] In the open state of the explosion-proof valve of the battery cell, the pressure relief hole is used to communicate the explosion-proof valve and the flow guide channel.

[0012] And the pressure relief hole corresponds to the explosion-proof valve of the battery cell.

[0013] As an optional solution of the battery pack, the frame includes a plurality of outer frames connected in sequence, each of the outer frames has an outer pressure relief channel formed therein, and each of the outer pressure relief channels communicates with each other and forms part of the pressure relief channel.

[0014] As an optional solution of the battery pack, the frame further includes an inner frame, both ends of the inner frame are connected to two oppositely arranged outer frames, an inner pressure relief channel is formed in the inner frame, and the inner pressure relief channel communicates with the outer pressure relief channel in the corresponding outer frame.

[0015] As an optional solution of the battery pack, the number of inner frames is two, and the two inner frames are arranged in parallel and spaced apart and surround the corresponding outer frames to form the accommodation space.

[0016] As an optional solution of the battery pack, a first end of the flow guide member is fixed to one of the inner frames, a first connecting hole that communicates with the flow guide channel is formed on a side of the first end of the flow guide member that faces the explosion-proof valve of the battery cell, and the inner frame connected to the first end of the flow guide member has a pressure relief inlet that corresponds to and communicates with the first connecting hole; and / or

[0017] A second end of the flow guide member is fixed to the other inner frame, a second connecting hole that communicates with the flow guide channel is formed on a side of the second end of the flow guide member that faces the explosion-proof valve of the battery cell, and the inner frame connected to the second end of the flow guide member has a pressure relief inlet that corresponds to and communicates with the second connecting hole.

[0018] As an optional solution of the battery pack, the battery pack further includes an insulating member, the flow guide member and the battery cell are provided with the insulating member, and the insulating member has a plurality of first through holes that correspond one-to-one to the pressure relief holes.

[0019] As an optional solution of the battery pack, the shape of the pressure relief hole is the same as the shape of the first through hole.

[0020] As an optional solution of the battery pack, a plurality of the battery cells arranged along a first direction form a group of battery cell groups, at least two groups of the battery cell groups are arranged at intervals along a second direction, and each group of the battery cell groups is configured with the flow guide.

[0021] As an optional solution of the battery pack, the battery pack further comprises a support member extending along the first direction, and the support member is arranged between two adjacent groups of the battery cell groups, and the length of the support member in the first direction is the same as the length of the battery cell group.

[0022] In a second aspect, the present application provides a vehicle comprising a chassis, a vehicle body and the battery pack according to any one of the above, the vehicle body is mounted on the chassis and cooperates with the chassis to form a passenger cabin, and the battery pack is mounted on the chassis, and the explosion-proof valve of the battery cell in the battery pack faces away from the passenger cabin.

[0023] The present application has the following beneficial effects:

[0024] The battery pack provided by the present application comprises a frame, a battery cell module and a flow guide, the frame has a pressure relief channel formed inside, the frame has a pressure relief inlet and a pressure relief outlet connected to the pressure relief channel, and the pressure relief outlet is arranged on the outer side wall of the frame; the flow guide has a flow guide channel formed inside and connected to the pressure relief inlet, and one side of the flow guide facing the explosion-proof valve of the battery cell has a pressure relief hole connected to the flow guide channel, and the projection of the pressure relief hole on the battery cell at least partially overlaps the explosion-proof valve to connect the explosion-proof valve and the flow guide channel. When the battery cell is in thermal runaway, the high-temperature gas in the battery cell is ejected from the explosion-proof valve, then enters the flow guide channel through the pressure relief hole, and is guided by the flow guide channel to enter the pressure relief channel through the pressure relief inlet, and finally is discharged from the pressure relief outlet on the outer side wall of the frame. Not only can the high-temperature gas be prevented from being directly sprayed in the direction of the battery pack cover, but also the high-temperature gas can be prevented from wandering in other positions in the battery pack, thereby improving the safety of the battery pack.

[0025] The vehicle provided by the present application can reduce the risk of endangering the safety of passengers when the battery pack is in thermal runaway by applying the above-mentioned battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0027] Figure 1 The structure of the battery pack provided by the present application is shown.

[0028] Figure 2 A cross-sectional view of a battery pack is shown.

[0029] Figure 3 A structural view of a battery pack hidden box cover is shown.

[0030] Figure 4 A structural view of a battery pack is shown. Figure 3 A structural view of a battery pack is shown.

[0031] Figure 5 A structural view of a battery pack is shown. Figure 3 A structural view of a battery pack is shown.

[0032] Figure 6 A structural view of a battery pack is shown.

[0033] Reference signs:

[0034] 1, frame; 101, pressure relief outlet; 102, pressure relief inlet; 102a, first pressure relief inlet; 102b, second pressure relief inlet; 11, outer frame; 110, outer pressure relief channel; 111, first outer frame; 112, second outer frame; 113, third outer frame; 114, fourth outer frame; 12, inner frame; 120, inner pressure relief channel; 120a, first inner pressure relief channel; 120b, second inner pressure relief channel; 121, first inner frame; 122, second inner frame;

[0035] 2, battery cell module; 20, battery cell group; 21, battery cell; 211, explosion-proof valve;

[0036] 3, flow guide; 30, flow guide channel; 31, pressure relief hole; 32, first connecting hole; 33, second connecting hole;

[0037] 4, insulating piece; 41, first through hole; 42, second through hole;

[0038] 5, support piece;

[0039] 6, foaming glue;

[0040] 7, box cover;

[0041] 8, pressure relief valve;

[0042] 9, fireproof protective cover. DETAILED DESCRIPTION

[0043] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0044] In this application, the terms "include", "comprise" or "have" or any other variations thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that include a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0045] In this application, the term "and / or", is a description of an associated object, which means that there can be three kinds of relationships. For example, A and / or B, can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0046] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection means that two parts or components are connected together without setting intermediate parts, indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0047] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

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

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

[0050] The present application provides a vehicle, comprising a chassis, a vehicle body and a battery pack, the vehicle body is installed on the chassis and cooperates with the chassis to form a passenger compartment, and the battery pack is installed on the chassis and used to provide power to the vehicle to enable the vehicle to normally travel.

[0051] Figure 1 The structure schematic diagram of the battery pack provided by the embodiments of the present application is shown. Figure 2 The structure schematic diagram of the battery pack provided by the embodiments of the present application is shown. Figure 3 The structure schematic diagram of the battery pack hiding box cover 7 provided by the embodiments of the present application is shown. As shown in the figure, Figures 1 to 3 The battery pack includes a frame 1, a battery cell module 2 and a box cover 7, the frame 1 surrounds to form a containing space containing the battery cell module 2, the containing space has an open end at both ends in the height direction of the frame 1, and two box covers 7 are respectively fixed to the top open end and the bottom open end of the frame 1, so as to realize the packaging of the battery cell module 2.

[0052] The battery cell module 2 includes a plurality of battery cells 21, and the explosion-proof valve 211 of the battery cell 21 faces any open end of the containing space. When the battery pack is packed into the vehicle chassis, the explosion-proof valve 211 of the battery cell 21 in the battery pack faces away from the passenger compartment of the vehicle, so as to avoid the harmful substances generated by the thermal runaway of the battery pack directly spraying towards the passenger compartment direction, and also can reduce the spread speed of heat diffusion, and improve the safety performance of the battery pack.

[0053] In the present embodiment, the box cover 7 integrates the function of the liquid cooling plate, which not only can heat or cool the battery cell module 2, but also can reduce the weight of the battery pack, and realize the lightweight design of the battery pack. For example, the box cover 7 and the frame 1 are fixedly connected by using the core-pulling rivet, and the structural adhesive is applied at the connecting part between the two, so as to improve the sealing performance of the connecting part. In addition, the edges of the box cover 7 and the edges of the frame 1 can be fixedly connected by using the friction stir welding, which not only has high connection strength, but also has good sealing performance.

[0054] Further, the heat-conducting structure glue is arranged between the battery cell module 2 and the box cover 7 to fix them, which can not only improve the heat conduction between the battery cell module 2 and the box cover 7, but also enhance the stability of the installation of the battery cell module 2.

[0055] Figure 4 A schematic view of the battery pack is shown. Figure 3 A schematic view of the battery pack is shown. Figure 5 A schematic view of the battery pack is shown. Figure 3 A schematic view of the battery pack is shown. Figures 4 to 5 A schematic view of the battery pack is shown. Figure 2 As shown in the figure, the battery pack further comprises a flow guide 3 installed on the frame 1, and the frame 1 is internally formed with a pressure relief channel. The frame 1 is provided with a pressure relief inlet 102 and a pressure relief outlet 101 which are in communication with the pressure relief channel, and the pressure relief outlet 101 is arranged on the outer side wall of the frame 1. The flow guide 3 is internally formed with a flow guide channel 30 which is in communication with the pressure relief inlet 102, and one side of the flow guide 3 facing the explosion-proof valve 211 of the battery cell 21 is provided with a pressure relief hole 31 which is in communication with the flow guide channel 30. The projection of the pressure relief hole 31 on the battery cell 21 at least partially overlaps the explosion-proof valve 211, so that the pressure relief hole 31 communicates the explosion-proof valve 211 and the flow guide channel 30. When the battery cell 21 is in thermal runaway, the high-temperature gas in the battery cell 21 is ejected from the explosion-proof valve 211, then enters the flow guide channel 30 through the pressure relief hole 31, and is guided by the flow guide channel 30 to enter the pressure relief channel from the pressure relief inlet 102, and finally is discharged from the pressure relief outlet 101 on the outer side wall of the frame 1. This not only avoids the high-temperature gas directly spraying towards the box cover 7, reduces the probability of the battery cell 21 moving upward to break the box cover 7 under the rebound effect of the high-temperature gas on the box cover 7, but also avoids the high-temperature gas wandering in other positions in the battery pack, so as to improve the safety of the battery pack.

[0056] In addition, the battery pack further comprises a pressure relief valve 8 installed on the outer side wall of the frame 1 and in communication with the pressure relief outlet 101. It should be noted that the pressure relief valve 8 can be selected from the battery pack pressure relief valve in the conventional technology, and the structure and working principle of the pressure relief valve 8 will not be described here.

[0057] Further, the battery pack further comprises a fire protection cover 9 installed on the outer side wall of the frame 1 and covering the pressure relief valve 8 to protect the pressure relief valve 8. Of course, it can be understood that there is a gap between the fire protection cover 9 and the outer side wall of the frame 1 to allow the gas ejected at the pressure relief valve 8 to overflow.

[0058] In the embodiment, the frame 1 comprises four outer frames 11 connected in sequence, and each outer frame 11 is internally formed with an outer pressure relief channel 110, and the outer pressure relief channels 110 are in communication and form part of the pressure relief channel. In other embodiments, the outer frames 11 of the frame 1 can also be formed by an integral structure without assembly.

[0059] The frame 1 further comprises inner side frames 12, two ends of each of the inner side frames 12 are connected with two oppositely arranged outer side frames 11 respectively, and an inner pressure relief channel 120 is formed in each of the inner side frames 12, and the inner pressure relief channel 120 is in communication with the outer pressure relief channel 110 in the corresponding outer side frame 11.

[0060] Further, the number of the inner side frames 12 is two, and the two inner side frames 12 are arranged in parallel and spaced apart, and the corresponding outer side frames 11 are arranged to form a containing space. In this way, the space formed by the outer side frames 11 can be divided into two spaces, one of which is used to contain the battery cell module 2, and the other is used to contain the electronic components such as the battery management system of the battery pack, which can improve the space utilization rate in the battery pack and improve the installation stability of the battery cell module 2.

[0061] For the convenience of description, referring to Figures 2 to 5 As shown in the figure, the two inner side frames 12 are respectively denoted as a first inner side frame 121 and a second inner side frame 122, the two outer side frames 11 connected with the inner side frames 12 are respectively denoted as a first outer side frame 111 and a second outer side frame 112, and the other two outer side frames 11 are respectively denoted as a third outer side frame 113 and a fourth outer side frame 114. Further, one end of the first inner side frame 121 is fixedly connected with the first outer side frame 111, and the other end is fixedly connected with the second outer side frame 112, the inner pressure relief channel 120 in the first inner side frame 121 is denoted as a first inner pressure relief channel 120a, and the pressure relief inlet 102 formed on the first inner pressure relief channel 120a is denoted as a first pressure relief inlet 102a; one end of the second inner side frame 122 is fixedly connected with the first outer side frame 111, and the other end is fixedly connected with the second outer side frame 112, the inner pressure relief channel 120 in the second inner side frame 122 is denoted as a second inner pressure relief channel 120b, and the pressure relief inlet 102 formed on the second inner pressure relief channel 120b is denoted as a second pressure relief inlet 102b.

[0062] Figure 6 A structure schematic diagram of the flow guide 3 provided by the embodiment of the application is shown. As Figure 6 In combination with Figures 2 to 5As shown, the first end of the flow guide 3 is fixed to the first inner frame 121, and the first end of the flow guide 3 is provided with a first connecting hole 32 communicating with the flow guide channel 30 on the side facing the explosion-proof valve 211 of the battery cell 21, and the first inner frame 121 is provided with a first pressure relief inlet 102a corresponding to the first connecting hole 32. The second end of the flow guide 3 is fixed to the second inner frame 122, and the second end of the flow guide 3 is provided with a second connecting hole 33 communicating with the flow guide channel 30 on the side facing the explosion-proof valve 211 of the battery cell 21, and the second inner frame 122 is provided with a second pressure relief inlet 102b corresponding to the second connecting hole 33. In this way, when multiple battery cells 21 are in thermal runaway, a part of the high-temperature gas in the flow guide channel 30 of the flow guide 3 can enter the first pressure relief inlet 102a from the first connecting hole 32, then enter the first inner pressure relief channel 120a, and then enter the outer pressure relief channel 110 under the guidance of the second inner pressure relief channel 120b, and finally be discharged from the pressure relief valve 8 of the pressure relief outlet 101; another part can enter the second pressure relief inlet 102b from the second connecting hole 33, then enter the second inner pressure relief channel 120b, and then enter the outer pressure relief channel 110 under the guidance of the second inner pressure relief channel 120b, and finally be discharged from the pressure relief valve 8 of the pressure relief outlet 101.

[0063] In this embodiment, the flow guide 3 can be made of an aluminum extrusion strip, which has the advantages of high structural strength, light weight, and low processing cost, thereby improving the competitiveness of the battery pack.

[0064] In addition, it should be noted that the flow guide 3 has an open end at both ends in the length direction of the flow guide 3 during the molding process, so the two ends of the flow guide channel 30 need to be plugged with a sealing strip before or after the flow guide 3 is assembled, so as to reduce the amount of high-temperature gas directly discharged into the inside of the battery pack.

[0065] The battery pack further comprises an insulating member 4, and the flow guide 3 and the battery cell 21 are provided with the insulating member 4, and the insulating member 4 has a plurality of first through holes 41 corresponding to the pressure relief holes 31. In this way, the insulation between the flow guide 3 and the battery cell 21 can be ensured, and the high-temperature gas sprayed at the explosion-proof valve 211 of the battery cell 21 can enter the pressure relief hole 31 from the first through hole 41, and then enter the flow guide channel 30.

[0066] Further, the pressure relief hole 31 has the same shape as the first through hole 41, such as the same shape as the explosion-proof valve 211 of the battery cell 21. In this embodiment, the pressure relief hole 31 and the first through hole 41 are both long waist holes.

[0067] In addition, the insulation piece 4 also has two second through holes 42, one of which is in communication with the first connecting hole 32, and the other is in communication with the second connecting hole 33, so as to ensure that the gas in the flow guide channel 30 can enter the inner pressure relief channel 120.

[0068] In the embodiment, the insulation piece 4 can be selected as foam. The foam not only has insulation effect, but also has shockproof effect, and can absorb the force of the flow guide piece 3 acting on the direction of the battery cell 21. In the case that the battery pack vibrates, the flow guide piece 3 generates a large force on the battery cell 21, so as to avoid the battery cell 21 being excessively pressed, and further improve the stability of the battery cell 21.

[0069] In order to improve the stability of the installation of the flow guide piece 3, a structural adhesive is arranged between the flow guide piece 3 and the box cover 7, so as to enhance the connection strength between the flow guide piece 3 and the box cover 7.

[0070] Continuing to refer to Figure 4 As shown, a plurality of battery cells 21 arranged along the first direction form a group of battery cell groups 20, and two groups of battery cell groups 20 are arranged along the second direction. Each group of battery cell groups 20 is provided with a flow guide piece 3, wherein the first direction and the second direction are perpendicular. In other embodiments, the number of battery cell groups 20 can also be one group, three groups, four groups, five groups, etc. without limitation.

[0071] In order to improve the stability of the battery cell module 2, the battery pack further comprises a support piece 5 extending along the first direction, and the support piece 5 is arranged between the two adjacent groups of battery cell groups 20. In the first direction, the length of the support piece 5 is the same as the length of the battery cell group 20.

[0072] Further, when all the battery cell groups 20 are loaded into the accommodation space, the foaming glue 6 is poured into the accommodation space, which not only ensures the stability of the battery cell groups 20, but also ensures the insulation between the battery cell groups 20 and the support piece 5, the inner frame 12 and the outer frame 11, and further improves the safety of the battery pack.

[0073] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A battery pack, characterized by, The application relates to a frame (1) which is provided with a containing space, both ends of the containing space in the height direction of the frame (1) are open, a pressure relief channel is formed in the frame (1), the frame (1) is provided with a pressure relief inlet (102) and a pressure relief outlet (101) which are connected with the pressure relief channel, and the pressure relief outlet (101) is arranged on the outer side wall of the frame (1). An electric cell module (2) is arranged in the containing space, the electric cell module (2) comprises an electric cell (21), and the explosion-proof valve (211) of the electric cell (21) faces any opening of the containing space. A flow guide member (3) is arranged in the frame (1), the flow guide member (3) is provided with a flow guide channel (30) which is connected with the pressure relief inlet (102), and one side of the flow guide member (3) which faces the explosion-proof valve (211) of the electric cell (21) is provided with a pressure relief hole (31) which is connected with the flow guide channel (30), and the projection of the pressure relief hole (31) on the electric cell (21) at least partially overlaps the explosion-proof valve (211). In the open state of the explosion-proof valve (211) of the electric cell (21), the pressure relief hole (31) is used for connecting the explosion-proof valve (211) and the flow guide channel (30). The frame (1) comprises a plurality of outer frames (11) which are connected in sequence, each outer frame (11) is provided with an outer pressure relief channel (110), and each outer pressure relief channel (110) is connected with each other and forms part of the pressure relief channel.

2. The battery pack of claim 1, wherein, The frame (1) further comprises an inner frame (12), both ends of the inner frame (12) are connected with two oppositely arranged outer frames (11), the inner frame (12) is provided with an inner pressure relief channel (120), and the inner pressure relief channel (120) is connected with the outer pressure relief channel (110) in the corresponding outer frame (11).

3. The battery pack of claim 2, wherein, The number of the inner frames (12) is two, the two inner frames (12) are arranged in parallel and are spaced apart and are connected with the corresponding outer frames (11) to form the containing space.

4. The battery pack of claim 3, wherein, The first end of the flow guide member (3) is fixed to one inner frame (12), one side of the first end of the flow guide member (3) which faces the explosion-proof valve (211) of the electric cell (21) is provided with a first connecting hole (32) which is connected with the flow guide channel (30), the inner frame (12) which is connected with the first end of the flow guide member (3) is provided with the pressure relief inlet (102) which is connected with the first connecting hole (32); and / or 5. The battery pack of claim 4, wherein, The second end of the flow guide member (3) is fixed to the other inner frame (12), one side of the second end of the flow guide member (3) which faces the explosion-proof valve (211) of the electric cell (21) is provided with a second connecting hole (33) which is connected with the flow guide channel (30), and the inner frame (12) which is connected with the second end of the flow guide member (3) is provided with the pressure relief inlet (102) which is connected with the second connecting hole (33). ​ 6. The battery pack of claim 1, wherein, The battery pack further comprises an insulating member (4) arranged between the flow guide member (3) and the battery cell (21), and the insulating member (4) has a plurality of first through holes (41) corresponding to the pressure relief holes (31) one by one.

7. The battery pack of claim 6, wherein, The pressure relief holes (31) have the same shape as the first through holes (41).

8. The battery pack of any one of claims 1-7, wherein, A plurality of the battery cells (21) arranged in a first direction form a group of battery cell groups (20), and at least two groups of the battery cell groups (20) are arranged in a second direction, and each group of the battery cell groups (20) is provided with the flow guide member (3), wherein the first direction and the second direction are perpendicular to each other.

9. The battery pack of claim 8, wherein, The battery pack further comprises a support member (5) extending in the first direction, and the support member (5) is arranged between two adjacent groups of the battery cell groups (20), and in the first direction, the length of the support member (5) is the same as the length of the battery cell group (20).

10. A vehicle characterized by comprising: The battery pack comprises a chassis, a vehicle body and the battery pack according to any one of claims 1-9, the vehicle body is mounted on the chassis and cooperates with the chassis to form a passenger compartment, the battery pack is mounted on the chassis, and the explosion-proof valve (211) of the battery cell (21) in the battery pack is arranged away from the passenger compartment.

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