Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and an electric device, the battery pack comprises a box body, a cover body, a battery pack and a fire extinguishing mechanism; the box body is provided with an accommodating cavity; the cover body is connected with the box body and covers and seals the accommodating cavity; the battery pack is arranged in the accommodating cavity and comprises a plurality of single batteries; the fire extinguishing mechanism is arranged in the containing cavity, the fire extinguishing mechanism comprises fire extinguishing pipes and a collecting pipe, the collecting pipe is connected to the box body, and the multiple fire extinguishing pipes are connected to the collecting pipe; the fire extinguishing pipe is located between the battery monomer and the cover body, and the fire extinguishing pipe is provided with a jet orifice facing the cover body; according to the battery pack provided by the utility model, the fire extinguishing pipe is arranged between the battery monomers and the cover body, and the jet orifice faces the cover body, so that fire extinguishing substances jetted from the jet orifice can quickly and timely extinguish flames generated from the explosion-proof valves of the battery monomers, and the safety of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and a battery cell. Background Technology

[0002] As the power source for electric vehicles, the safety of the battery pack during use directly affects the safety of the entire vehicle. A battery pack typically consists of multiple battery cells arranged side by side. When a battery cell experiences thermal runaway, the explosion-proof valve of the battery cell will spray a large amount of high-temperature and high-pressure gas or even flames into the battery pack. If the fire is not extinguished in time, the flames will spread to other nearby battery cells and cause thermal runaway to spread, resulting in more serious consequences such as damage to multiple battery cells or even battery pack explosion, thus affecting the safety of the battery pack. Utility Model Content

[0003] With the aim of at least solving one of the technical problems existing in the prior art, this utility model aims to provide a battery pack and an electrical device having the battery pack, wherein the battery pack can improve the safety of the battery pack.

[0004] To achieve the above objectives, this utility model provides a battery pack having intersecting first and second directions. The battery pack includes a housing, a cover, a battery pack, and a fire extinguishing mechanism. The housing has a receiving cavity. The cover is connected to the housing and seals the receiving cavity. The battery pack is disposed within the receiving cavity and includes multiple battery cells distributed along the first direction. The fire extinguishing mechanism is disposed within the receiving cavity and includes a fire extinguishing pipe and a manifold. The manifold is connected to the housing and has multiple fire extinguishing pipes spaced apart along the first direction. Along the second direction, the fire extinguishing pipe is located between the battery cells and the cover, and the fire extinguishing pipe has a nozzle facing the cover for spraying fire extinguishing material. The nozzle is connected to the manifold.

[0005] In some embodiments, the battery pack further includes a liquid cooling mechanism disposed within the receiving cavity. The liquid cooling mechanism includes a current collector and a liquid cooling plate. The current collector is connected to the housing, and the liquid cooling plate is connected to the current collector and to the side of the battery cell.

[0006] In some embodiments, along the second direction, the liquid cooling plate has a recessed mounting groove at one end near the cover, the manifold is housed in the mounting groove and the manifold is connected to the groove wall of the mounting groove.

[0007] In some embodiments, the fire extinguishing pipe is inclined relative to the second direction; along the second direction, the spray nozzle is positioned close to the battery cell.

[0008] In some embodiments, the battery pack further has a third direction, which intersects the first direction and the second direction in pairs. Each battery cell includes a housing, terminals, an explosion-proof valve, and a top cover. The top cover is connected to the housing. The terminals and the explosion-proof valve are both mounted on the top cover. The terminals and the explosion-proof valve are spaced apart along the third direction. Along the third direction, one terminal is located between the explosion-proof valve and the manifold. The terminal has a first end and a second end that are oppositely arranged. The first end is close to the manifold. The fire extinguishing pipe has a connecting end and a spraying end that are oppositely arranged and connected to each other. The connecting end is directly connected to the manifold, and the spraying nozzle is located at the spraying end. Along the second direction, the projection of the fire extinguishing pipe onto the first plane and the projection of the terminal onto the first plane partially overlap.

[0009] In some embodiments, along the second direction, the projection of the injection end onto the first plane is entirely within the projection of the pole located near the manifold onto the first plane.

[0010] In some embodiments, the cover includes a plate body and a flow guide, the flow guide being provided on the side of the plate body facing the battery pack.

[0011] In some embodiments, the first direction and the second direction intersect to form a second plane, and the third direction intersects with the second plane; the guide portion has a triangular prism structure, the guide portion has an edge, and the edge faces the explosion-proof valve; along the third direction, the pole is located between the guide portion and the manifold, and the projection of the fire extinguishing pipe on the second plane and the projection of the guide portion on the second plane partially overlap.

[0012] In some embodiments, the battery pack further includes a controller that is electrically connected to the fire extinguishing mechanism.

[0013] The present invention also provides an electrical device, the electrical device comprising a battery pack according to any one of the preceding claims.

[0014] Compared with the prior art, the battery pack of this utility model has the following advantages: the nozzle and the manifold are connected, so when a battery cell experiences thermal runaway, the extinguishing agent in the manifold can be transported to the nozzle through the extinguishing pipe. By placing the extinguishing pipe between the battery cell and the cover and directing the nozzle towards the cover, the extinguishing agent sprayed from the nozzle can quickly cover the upper part of the battery cell and extinguish the flame generated from the explosion-proof valve of the battery cell in a timely manner due to the obstruction of the cover. This effectively prevents the flame from spreading to other adjacent battery cells in the containment cavity, reduces the risk of thermal runaway propagation, and improves the safety of the battery pack. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of the present invention;

[0016] Figure 2 This is a first cross-sectional schematic diagram of a battery pack provided in an embodiment of the present invention;

[0017] Figure 3 This is a second cross-sectional schematic diagram of a battery pack provided in an embodiment of the present invention;

[0018] Figure 4 This is an exploded view of a battery pack provided in an embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram showing the connection between the controller and the fire extinguishing mechanism provided in this embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the cover provided in an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the fire extinguishing mechanism provided in this embodiment of the utility model;

[0022] Figure 8 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this utility model;

[0023] Figure 9 This is a top view of a battery pack with the cover omitted, according to an embodiment of the present invention;

[0024] Figure 10 This is a schematic diagram of the liquid cooling mechanism provided in an embodiment of the present invention;

[0025] Figure 11 yes Figure 10 Enlarged diagram of point A.

[0026] In the diagram, 1 is the box body; 11 is the opening; and 12 is the receiving cavity.

[0027] 2. Cover body; 21. Main body of the plate; 22. Air guide; 23. Frame; 221. Edges;

[0028] 3. Battery pack; 31. Battery cell; 311. Housing; 312. Terminal; 313. Explosion-proof valve; 314. Top cover; 3121. First terminal; 3122. Second terminal;

[0029] 4. Fire extinguishing mechanism; 41. Fire extinguishing pipe; 42. Manifold; 43. Manifold; 411. Connection end; 412. Spray end; 4121. Spray nozzle;

[0030] 5. Liquid cooling mechanism; 51. Manifold; 52. Liquid cooling plate; 521. Mounting groove;

[0031] 6. Controller;

[0032] X, first direction; Z, second direction; Y, third direction. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0039] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0040] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] like Figures 1-11As shown, a preferred embodiment of the present invention provides a battery pack with intersecting first direction X, second direction Z, and third direction Y. The battery pack includes a housing 1, a cover 2, a battery pack 3, and a fire extinguishing mechanism 4. The housing 1 has a receiving cavity 12. The cover 2 is connected to the housing 1 and seals the receiving cavity 12. The battery pack 3 is disposed in the receiving cavity 12 and includes multiple battery cells 31 distributed along the first direction X. The fire extinguishing mechanism 4 is disposed in the receiving cavity 12 and includes a fire extinguishing pipe 41 and a manifold 42. The manifold 42 is connected to the housing 1 and has multiple fire extinguishing pipes 41 spaced apart along the first direction X. Along the second direction Z, the fire extinguishing pipe 41 is located between the battery cells 31 and the cover 2. The fire extinguishing pipe 41 has a spray nozzle 4121 facing the cover 2 and used for spraying fire extinguishing material. The spray nozzle 4121 is connected to the manifold 42, and the fire extinguishing pipe 41 is connected to the manifold 42.

[0042] Based on this technical solution, when a battery cell 31 experiences thermal runaway, the extinguishing agent in the manifold 42 can be delivered to the nozzle 4121 via the extinguishing pipe 41. By placing the extinguishing pipe 41 between the battery cell 31 and the cover 2 and directing the nozzle 4121 toward the cover 2, the extinguishing agent sprayed from the nozzle 4121 can quickly cover the upper part of the battery cell 31 and extinguish the flame generated by the explosion-proof valve 313 of the battery cell 31 in a timely manner. This effectively prevents the flame from spreading from the containment cavity 12 to other adjacent battery cells 31, reduces the risk of thermal runaway propagation, and improves the safety of the battery pack.

[0043] The first direction X and the third direction Y intersect to form a first plane, and the second direction Z intersects with the first plane.

[0044] The first direction X and the second direction Z intersect to form a second plane, and the third direction Y intersects with the second plane.

[0045] In this embodiment, the first direction X, the second direction Z, and the third direction Y are mutually perpendicular. The first direction X is the length direction of the battery pack, the second direction Z is the height direction of the battery pack, and the third direction Y is the width direction of the battery pack. The second direction Z is perpendicular to the first plane, and the third direction Y is perpendicular to the second plane.

[0046] There are multiple battery packs 3, and these multiple battery packs 3 are distributed along the third direction Y.

[0047] In this embodiment, there are four battery packs 3. Each battery pack 3 includes nine battery cells 31. In other embodiments, the number of battery packs 3 and the number of battery cells 31 in each battery pack 3 can be flexibly increased or decreased, which will not be elaborated here.

[0048] The fire extinguishing mechanism 4 also includes a manifold 43, which is connected to multiple manifolds 42 spaced at intervals along a third direction (Y). By using the manifold 43 to connect multiple manifolds 42, the manifolds 42 can be laid in multiple directions within the battery pack, thereby enabling the fire extinguishing pipes 41 on the manifolds 42 to spray extinguishing materials to the fire area more quickly and effectively.

[0049] Specifically, the cover 2 seals the opening 11 of the receiving cavity 12.

[0050] Extinguishing substances can be, but are not limited to, heptafluoropropane, carbon dioxide, nitrogen, or other substances that can inhibit combustion, in physical form as gas or liquid.

[0051] One battery cell 31 corresponds to at least one fire extinguishing tube 41.

[0052] See Figure 5 The battery pack also includes a controller 6, which is electrically connected to the fire extinguishing mechanism 4.

[0053] The controller 6 determines whether there is a fire area inside the battery pack. When the controller 6 determines that there is a fire area inside the battery pack, the controller 6 controls the fire extinguishing mechanism 4 to spray fire extinguishing material to the fire area to extinguish the flames in the fire area, prevent the flames from spreading to other adjacent areas in the containment cavity 12, and reduce the risk of thermal runaway.

[0054] Controller 6 can be the BMS controller 6 of the battery pack or other controller 6, and there is no limitation here.

[0055] Specifically, the fire extinguishing mechanism 4 also includes a fire extinguishing valve (not shown), which is installed on the manifold 43 and / or the manifold 42 and / or the fire extinguishing pipe 41.

[0056] See Figures 2-6 The fire extinguishing pipe 41 is inclined relative to the second direction Z. Since the nozzle 4121 of the fire extinguishing pipe 41 faces the cover 2, this inclination allows the nozzle 4121 to be tilted towards the cover 2, ensuring that the extinguishing agent sprayed from the nozzle 4121 can better cover the entire battery pack interior. This ensures the extinguishing agent is evenly distributed to areas where a fire may occur, increasing the effectiveness of fire suppression. In one embodiment, along the second direction Z, the nozzle 4121 is positioned close to the battery cell 31. That is, along the second direction Z, the distance between the nozzle 4121 and the battery cell 31 is less than the distance between the nozzle 4121 and the cover 2. This allows the nozzle 4121 to be closer to the explosion-proof valve 313, which is beneficial for fire suppression.

[0057] The cover 2 includes a main plate 21 and a guide section 22, with the guide section 22 protruding from the side of the main plate 21 facing the battery pack 3. Since the nozzle 4121 of the fire extinguishing pipe 41 is inclined towards the cover 2, the guide section 22 on the main plate 21 can guide the fire extinguishing material sprayed from the nozzle 4121 of the fire extinguishing pipe 41, helping to deliver more fire extinguishing material to the explosion-proof valve 313 of the battery cell 31, thus improving the timeliness and effectiveness of the fire extinguishing material landing at the fire location.

[0058] The cover 2 also includes a frame 23, which protrudes from the main body 21 on the side facing the battery pack 3 and surrounds the flow guide 22. The frame 23 is connected to the housing 1.

[0059] The flow guide 22 has a triangular prism structure and has a corner 221 facing the explosion-proof valve 313. Along the third direction Y, the pole post 312 is located between the flow guide 22 and the manifold 42. The projection of the fire extinguishing pipe 41 on the second plane and the projection of the flow guide 22 on the second plane partially overlap. By employing a triangular prism structure for the guide section 22, with the corner 221 of the guide section 22 facing the explosion-proof valve 313, and by overlapping the projection of the fire extinguishing pipe 41 on the second plane with the projection of the guide section 22 on the second plane, the guide section 22 can block the extinguishing material sprayed from the nozzle 4121 of the fire extinguishing pipe 41. This allows the side of the guide section 22 to guide the blocked extinguishing material to the corner 221 of the guide section 22, enabling the extinguishing material to fall precisely from the corner 221 to the explosion-proof valve 313 of the battery cell 31. This helps to further improve the timeliness and effectiveness of the extinguishing material falling to the fire location.

[0060] See Figures 2-9 The battery cell 31 includes a housing 311, a terminal post 312, an explosion-proof valve 313, and a top cover 314. The top cover 314 is connected to the housing 311. The terminal post 312 and the explosion-proof valve 313 are both mounted on the top cover 314. The terminal post 312 and the explosion-proof valve 313 are spaced apart along the third direction Y. Along the third direction Y, the terminal post 312 is located between the explosion-proof valve 313 and the manifold 42. The terminal post 312 has a first end 3121 and a second end 3122 that are arranged opposite to each other. The first end 3121 is close to the manifold 42. The fire extinguishing pipe 41 has a connecting end 411 and a spraying end 412 that are opposite to each other. The connecting end 411 is connected to the manifold 42, and the spraying port 4121 is opened at the spraying end 412. In the second direction Z, the projection of the fire extinguishing pipe 41 on the first plane and the projection of the terminal post 312 on the first plane partially overlap.

[0061] Because the nozzle 4121 of the fire extinguishing pipe 41 is tilted towards the cover 2, and the fire extinguishing pipe 41 is located between the battery cell 31 and the cover 2, the overlapping arrangement of the projection of the fire extinguishing pipe 41 on the first plane and the projection of the pole 312 on the first plane, and the arrangement of the pole 312 between the explosion-proof valve 313 and the manifold 42, allows the nozzle 4121 to be tilted towards the position on the cover 2 corresponding to the explosion-proof valve 313. This allows more of the extinguishing material sprayed from the nozzle 4121 to fall onto the explosion-proof valve 313 of the battery cell 31, thereby reducing the temperature of the high-temperature gas sprayed from the explosion-proof valve 313 and extinguishing the flame in a timely and effective manner. At the same time, it also allows less of the extinguishing material sprayed from the nozzle 4121 to fall onto the pole 312 of the battery cell 31, reducing the contamination of the pole 312 by the extinguishing material and helping to reduce the risk of battery cell 31 failure during use.

[0062] Along the third direction Y, the distance between the first end 3121 and the second end 3122 is a mm, and the distance between the spray end 412 and the first end 3121 is b mm, satisfying b > 0.5a. Since the spray nozzle 4121 of the fire extinguishing pipe 41 is inclined towards the position on the cover 2 corresponding to the explosion-proof valve 313, by using b > 0.5a, more of the extinguishing material sprayed from the spray nozzle 4121 of the spray end 412 can fall onto the explosion-proof valve 313 position of the battery cell 31, further improving the timeliness and effectiveness of the extinguishing material landing at the fire location, and reducing the amount falling onto the terminal post 312 position of the battery cell 31, further reducing or even preventing contamination of the terminal post 312 by the extinguishing material. In one embodiment, along the second direction Z, the projection of the spray end 412 on the first plane is entirely within the projection of the terminal post 312 on the first plane, located near the manifold 42.

[0063] See Figures 2-4 ,and Figures 9-11 The battery pack also includes a liquid cooling mechanism 5 disposed within the housing cavity 12. The liquid cooling mechanism 5 includes a current collector 51 and a liquid cooling plate 52. The current collector 51 is connected to the housing 1, and the liquid cooling plate 52 is connected to the current collector 51 and is attached to the side of the battery cell 31. By setting the liquid cooling mechanism 5 within the housing cavity 12 and attaching the liquid cooling pack to the side of the battery cell 31, the heat generated by the battery cell 31 during operation can be carried away by the liquid cooling plate 52, keeping the battery cell 31 within a suitable operating temperature range and preventing overheating and fire. The fire extinguishing mechanism 4 can promptly spray fire extinguishing materials to extinguish the fire when the liquid cooling mechanism 5 cannot effectively control the temperature or when a fire occurs, thus providing dual protection.

[0064] Along the second direction Z, the liquid cooling plate 52 is recessed at one end near the cover 2 with a mounting groove 521, and the manifold 42 is housed in the mounting groove 521 and connected to the groove wall of the mounting groove 521.

[0065] By placing the manifold 42 within the mounting groove 521 of the liquid cooling plate 52, the space within the receiving cavity 12 can be effectively utilized to install the manifold 42, avoiding the occupation of additional installation space. This makes the internal structure of the battery pack more compact, which helps to improve the integration and space utilization of the battery pack. Furthermore, the liquid cooling plate 52 can control the temperature of the extinguishing material in the manifold 42, so that the temperature of the extinguishing material in the manifold 42 can be maintained within a suitable temperature range, which helps the extinguishing material to extinguish the flame generated from the explosion-proof valve 313 of the battery cell 31 more quickly and timely.

[0066] The present invention also provides an electrical device, which includes a battery pack according to any of the above claims.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having intersecting first direction (X) and second direction (Z), characterized in that, include: The housing (1) has a receiving cavity (12); A cover (2) is connected to the box (1) and seals the receiving cavity (12); A battery pack (3) is disposed in the receiving cavity (12), and the battery pack (3) includes a plurality of battery cells (31) distributed along the first direction (X); Fire extinguishing mechanism (4) is located in the receiving cavity (12). The fire extinguishing mechanism (4) includes a fire extinguishing pipe (41) and a manifold (42). The manifold (42) is connected to the box body (1). A plurality of fire extinguishing pipes (41) are connected to the manifold (42) at intervals along the first direction (X). Along the second direction (Z), the fire extinguishing pipe (41) is located between the battery cell (31) and the cover (2). The fire extinguishing pipe (41) has a spray nozzle (4121) facing the cover (2) and used for spraying fire extinguishing material. The spray nozzle (4121) is connected to the manifold (42).

2. The battery pack according to claim 1, characterized in that, It also includes a liquid cooling mechanism (5) disposed in the receiving cavity (12), the liquid cooling mechanism (5) includes a current collector (51) and a liquid cooling plate (52), the current collector (51) is connected to the housing (1), and the liquid cooling plate (52) is connected to the current collector (51) and connected to the side of the battery cell (31).

3. The battery pack according to claim 2, characterized in that, Along the second direction (Z), the liquid cooling plate (52) has a recessed mounting groove (521) at one end near the cover (2), the manifold (42) is housed in the mounting groove (521) and the manifold (42) is connected to the groove wall of the mounting groove (521).

4. The battery pack according to claim 1, characterized in that, The fire extinguishing pipe (41) is inclined relative to the second direction (Z); along the second direction (Z), the spray nozzle (4121) is located close to the battery cell (31).

5. The battery pack according to claim 4, characterized in that, The battery pack also has a third direction (Y), which intersects the first direction (X) and the second direction (Z) in pairs, and the first direction (X) and the third direction (Y) intersect to form a first plane; The battery cell (31) includes a housing (311), a terminal post (312), an explosion-proof valve (313), and a top cover (314). The top cover (314) is connected to the housing (311). The terminal post (312) and the explosion-proof valve (313) are both mounted on the top cover (314). The terminal post (312) and the explosion-proof valve (313) are spaced apart along the third direction (Y). Along the third direction (Y), a pole post (312) is located between the explosion-proof valve (313) and the manifold (42). The pole post (312) has a first end (3121) and a second end (3122) that are arranged opposite to each other. The first end (3121) is arranged close to the manifold (42). The fire extinguishing pipe (41) has a connecting end (411) and a spraying end (412) that are arranged opposite to each other and connected to each other. The connecting end (411) is directly connected to the manifold (42). The spraying port (4121) is opened at the spraying end (412). Along the second direction (Z), the projection of the fire extinguishing pipe (41) on the first plane and the projection of the pole (312) on the first plane partially overlap.

6. The battery pack according to claim 5, characterized in that, Along the second direction (Z), the projection of the injection end (412) on the first plane is entirely within the projection of the pole (312) located near the manifold (42) on the first plane.

7. The battery pack according to claim 5, characterized in that, The cover (2) includes a plate body (21) and a flow guide (22), the flow guide (22) protruding from the plate body (21) on the side facing the battery pack (3).

8. The battery pack according to claim 7, characterized in that, The first direction (X) and the second direction (Z) intersect to form a second plane; The flow guide (22) has a triangular prism structure and has a corner (221) facing the explosion-proof valve (313); Along the third direction (Y), the pole (312) is located between the guide section (22) and the manifold (42), and the projection of the fire extinguishing pipe (41) on the second plane and the projection of the guide section (22) on the second plane partially overlap.

9. The battery pack according to claim 1, characterized in that, It also includes a controller (6), which is electrically connected to the fire extinguishing mechanism (4).

10. An electrical device, characterized in that, Includes the battery pack according to any one of claims 1-9.

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