Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, and the battery pack comprises a bottom plate assembly, a frame and a cover body, a gas collecting cavity is formed in the bottom plate assembly; the frame comprises a first edge beam which is provided with an exhaust channel. The first edge beam comprises a first beam body, an exhaust seat and a first reinforcing structure, the first beam body is provided with a first end and a second end which are opposite, the first end faces the center side of the containing space and is provided with a first weight reduction groove, and the exhaust seat is connected to the groove bottom face of the first weight reduction groove; the first reinforcing structure is arranged in the first weight reduction groove and is connected with the first beam main body; the exhaust channel penetrates through the exhaust seat and the first beam main body and is communicated with the gas collection cavity; the exhaust channel in the first side beam is positioned in the exhaust seat, and the first reinforcing structure is arranged in the first weight reduction groove except the exhaust seat, so that the first side beam has certain strength, and the battery pack has better impact resistance.

Description

Technical Field

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

[0002] A battery pack includes a casing and battery cells housed within it. Under stress and thermal stimulation, the battery cells within the pack can short-circuit, leading to a cell explosion. During this explosion, a large mixture containing high-temperature molten material is ejected from the cell's explosion-proof valve, generating a significant amount of high-temperature gas. In related technologies, the casing's frame has an exhaust channel to expel the high-temperature gas outside the battery pack, preventing the accumulation of high-temperature gas within the casing and potential safety issues. However, the strength of the frame directly impacts the battery pack's shock resistance; therefore, such frames with exhaust channels require relatively high strength to ensure good shock resistance for the battery pack. Utility Model Content

[0003] The primary objective of this invention is to provide a battery pack with good impact resistance.

[0004] To achieve the above objectives, the present invention provides a battery pack having intersecting first and second directions, including a base plate assembly, a frame, and a cover.

[0005] In the first direction, the base plate assembly and the cover are respectively connected to both ends of the frame, and the base plate assembly, the frame, and the cover form an accommodating space;

[0006] The base plate assembly forms an air collection cavity;

[0007] The frame includes a first side beam, which has an exhaust channel;

[0008] The first side beam includes a first beam body, an exhaust seat, and a first reinforcing structure.

[0009] In the second direction, the first beam body has a first end and a second end opposite to each other, the first end facing the center side of the receiving space, and the first end has a first weight-reducing groove, the depth direction of the first weight-reducing groove being the same as the second direction;

[0010] The exhaust seat is connected to the bottom surface of the first weight reduction groove;

[0011] The first reinforcing structure is located inside the first weight-reducing groove and is connected to the main body of the first beam.

[0012] The exhaust channel passes through the exhaust seat and the first beam body, and the exhaust channel is connected to the gas collection chamber.

[0013] In a specific embodiment of this utility model, in the second direction, the orthographic projection of the exhaust seat on the bottom surface of the first weight-reducing groove is the first projection, and the area of ​​the first projection is the first surface;

[0014] The second end has a second weight-reducing groove, the depth direction of the second weight-reducing groove is the same as the second direction, and the groove opening area of ​​the second weight-reducing groove is the second area;

[0015] In the second direction, the opening of the second weight-reducing groove faces the first projection, and the second area is smaller than the first area.

[0016] In a specific embodiment of this utility model, the first side beam further includes a mounting base, which is disposed in the second weight-reducing groove and connected to the main body of the first beam;

[0017] The exhaust channel passes through the exhaust seat, the first beam body, and the mounting base;

[0018] The battery pack also includes a first explosion-proof valve, which is connected to the mounting base and seals the exhaust passage.

[0019] In a specific embodiment of this utility model, the battery pack further has a third direction, wherein the first direction, the second direction, and the third direction intersect each other;

[0020] The first reinforcing structure includes a first reinforcing rib and a second reinforcing rib;

[0021] The first reinforcing rib is strip-shaped, and its length direction intersects with the first direction. The first reinforcing rib is connected to the bottom surface of the first weight-reducing groove. There are multiple first reinforcing ribs, and the multiple first reinforcing ribs are arranged at intervals along the first direction.

[0022] The second reinforcing rib is strip-shaped, and its length direction intersects with the third direction. The second reinforcing rib is connected to the bottom surface of the first weight-reducing groove. There are multiple second reinforcing ribs, which are arranged at intervals along the third direction. One second reinforcing rib intersects with at least a portion of the first reinforcing rib.

[0023] In a specific embodiment of the present invention, the frame further includes a second side beam, and the first side beam and the second side beam are spaced apart along the second direction;

[0024] The second side beam includes a second beam body and a second reinforcing structure;

[0025] In the second direction, the second beam body has opposing third and fourth ends, the third ends facing the center side of the receiving space;

[0026] The fourth end has a third weight-reducing groove, and the depth direction of the third weight-reducing groove is the same as that of the second direction;

[0027] The second reinforcing structure is located inside the third weight-reducing groove and is connected to the main body of the second beam.

[0028] In a specific embodiment of this utility model, the battery pack further has a third direction, wherein the first direction, the second direction, and the third direction intersect each other;

[0029] The battery pack also includes a battery and an adhesive layer;

[0030] The number of batteries is multiple, and the multiple batteries are disposed in the accommodating space and arranged in an array to form a battery pack. In the battery pack, the multiple batteries are arranged in multiple rows in the second direction and in multiple columns in the third direction.

[0031] In the second direction, the battery pack has opposing first and second walls;

[0032] The first wall surface faces the first end, the first wall surface and the first end are spaced apart, and an installation space is formed between the first wall surface and the first end;

[0033] The second wall surface faces the third end, and the second wall surface is connected to the end face of the third end through the adhesive layer.

[0034] In a specific embodiment of this utility model, the second reinforcing structure includes a third reinforcing rib and a fourth reinforcing rib;

[0035] The third reinforcing rib is strip-shaped, and its length direction intersects with the first direction. The third reinforcing rib is connected to the bottom surface of the second weight-reducing groove. There are multiple third reinforcing ribs, and the multiple third reinforcing ribs are arranged at intervals along the first direction.

[0036] The fourth reinforcing rib is strip-shaped, and its length direction intersects with the third direction. The fourth reinforcing rib is connected to the bottom surface of the second weight-reducing groove. There are multiple fourth reinforcing ribs, which are arranged at intervals along the third direction. One fourth reinforcing rib intersects with at least a portion of the third reinforcing rib.

[0037] In a specific embodiment of this utility model, the base plate assembly includes a first plate and a second plate. Both the first plate and the second plate are connected to the frame, and the first plate and the second plate are spaced apart along the first direction. The air collection cavity is formed between the first plate and the second plate. The second plate has a plurality of exhaust holes that penetrate along the first direction, and the exhaust holes are connected to the air collection cavity.

[0038] The battery includes a battery body and a second explosion-proof valve, wherein the second explosion-proof valve is connected to the side of the battery body facing the second plate.

[0039] One of the second explosion-proof valves faces one of the exhaust ports.

[0040] In a specific embodiment of this utility model, the battery pack further includes a plurality of first separators, each of which has a weak portion;

[0041] Multiple first spacers are disposed between the battery pack and the second plate, and one first spacer corresponds to one battery body. In the first direction, the two ends of the first spacer are in contact with the battery body and the second plate, respectively. The vent, the weak part and the second explosion-proof valve are arranged along the first direction.

[0042] In a specific embodiment of this utility model, the first partition is provided with a groove, and the groove forms the weak part.

[0043] In a specific embodiment of this utility model, the first partition includes a first piece, a second piece, and a connecting body. The first piece has a mounting hole extending through the first direction. The second piece is disposed in the mounting hole. There are multiple connecting bodies. The connecting bodies are located between the outer peripheral surface of the second piece and the hole wall of the mounting hole, and the connecting bodies connect the second piece and the hole wall of the mounting hole. The multiple connecting bodies are arranged circumferentially around the second piece. The second piece and the connecting bodies form the weak part.

[0044] In a specific embodiment of this utility model, the battery pack further includes a second separator, and in the third direction, two adjacent first separators are connected by the second separator, and a plurality of first separators are connected in a row.

[0045] In a specific embodiment of this utility model, the battery pack further includes a plurality of first sealing layers, which are disposed between the battery pack and the second plate.

[0046] In the second direction, a single first sealing layer fills the space between two adjacent rows of first spacers;

[0047] In the first direction, both ends of the first sealing layer are in contact with the second plate and the battery body, respectively.

[0048] In a specific embodiment of the present invention, the battery pack further includes a plurality of second sealing layers and a plurality of spacers, wherein the plurality of second sealing layers and the plurality of spacers are disposed between the battery pack and the second plate.

[0049] The length direction of the spacer is the same as the third direction, and multiple spacers are spaced apart along the second direction;

[0050] The first partition in a single row is located between two adjacent partition strips;

[0051] The second sealing layer is an adhesive layer, and the spacer strip and the single row of first spacers, as well as the spacers between two adjacent spacers, are filled with the second sealing layer;

[0052] In the first direction, the two ends of the spacer are connected to the battery body and the second plate, respectively, and the two ends of the second sealing layer are connected to the battery body and the second plate, respectively.

[0053] In a specific embodiment of this invention, in the second direction, the length of the first partition is greater than the length of the second partition.

[0054] In a specific embodiment of this utility model, the battery pack further includes a plurality of third partitions, the third partitions being strip-shaped, the third partitions being disposed in the gas collection cavity, and the third partitions being connected to the first plate body, and the plurality of third partitions being arranged at intervals along the second direction;

[0055] In this arrangement, a row of the second explosion-proof valves faces one of the third partitions.

[0056] In a specific embodiment of this utility model, the battery pack further includes an elastic support member disposed in the gas collection cavity. In the first direction, one end of the elastic support member is connected to the first plate and the other end is connected to the second plate.

[0057] In a specific embodiment of this utility model, the elastic support is strip-shaped, the length direction of the elastic support is the same as the third direction, and there are multiple elastic supports. In the second direction, at least one elastic support is provided between two adjacent third partitions.

[0058] In a specific embodiment of this utility model, the elastic support includes a plurality of first support segments and a plurality of second support segments, the plurality of first support segments are spaced apart along the third direction, and two adjacent first support segments are connected by a second support segment;

[0059] The first support segment is connected to the first plate, and the second support segment protrudes toward the second plate relative to the first plate to form an arched structure. The second support segment is connected to the second plate.

[0060] In a specific embodiment of this utility model, the base plate assembly further includes a boss located in the gas collection cavity and connected to the second plate. The boss is strip-shaped and extends along the second direction. There are multiple bosses, which are arranged at intervals along the third direction. In the third direction, the bosses and the exhaust holes are alternately arranged. The bosses have a first flow channel, and each of the first flow channels is interconnected.

[0061] In the third direction, the second support segment is located between two adjacent bosses.

[0062] In a specific embodiment of this utility model, the boss includes a plurality of first connecting segments and a plurality of second connecting segments, the plurality of first connecting segments are spaced apart along the second direction, and two adjacent first connecting segments are connected by a second connecting segment, and the first flow channel passes through the first connecting segments and the second connecting segments;

[0063] The second connecting segment protrudes relative to the first connecting segment along the third direction. In the second direction, the exhaust hole is provided between two adjacent second connecting segments. In the third direction, the second support segment is located between two adjacent second connecting segments.

[0064] In a specific embodiment of this utility model, the second connecting segment includes a first segment, a second segment, and a third segment. The first segment is in the shape of a straight strip, and the length direction of the first segment is the same as the second direction. The length directions of the second segment and the third segment are oblique to the third direction. The first segment is connected to the second segment and the third segment at both ends of its length direction, respectively. The first segment is connected to the first connecting segment through the second segment and the third segment.

[0065] In a specific embodiment of this utility model, the second support segment includes a fourth segment, a fifth segment, and a sixth segment. The fourth segment is in the shape of a straight strip, and the length direction of the fourth segment is the same as the second direction. The length directions of the fifth segment and the sixth segment are oblique to the third direction. The two ends of the fourth segment along its length direction are respectively connected to the fifth segment and the sixth segment.

[0066] In the second connecting segment and the second supporting segment adjacent to each other in the third direction, the first segment, the second segment, and the third segment form a slot, and the fourth segment, the fifth segment, and the sixth segment are engaged in the slot. The first segment and the fourth segment are arranged along the third direction, the second segment and the fifth segment are arranged along the third direction, and the third segment and the sixth segment are arranged along the third direction.

[0067] In a specific embodiment of this utility model, the first support segment has a through hole extending along the first direction.

[0068] In a specific embodiment of this invention, the second plate has a second flow channel.

[0069] In a specific embodiment of the present invention, the battery pack further includes a first sealing ring, a second sealing ring, and a third sealing ring;

[0070] The frame has a first mounting surface, a second mounting surface, and a third mounting surface arranged around the center of the receiving space. The first mounting surface faces the cover, while the second and third mounting surfaces face away from the cover.

[0071] The first mounting surface is sealed to the cover body via the first sealing ring, the second mounting surface is sealed to the first plate body via the second sealing ring, and the third mounting surface is sealed to the second plate body via the third sealing ring.

[0072] In a specific embodiment of this utility model, the frame has an annular first mounting groove, the first mounting groove is located on the first mounting surface, the first mounting groove is arranged around the center of the accommodating space, the groove wall of the first mounting groove extends outward from the bottom surface of the groove to the groove opening, and the first mounting groove is provided with the first sealing ring.

[0073] In a specific embodiment of this utility model, the frame has an annular second mounting groove, the second mounting groove is located on the first mounting surface, the second mounting groove is arranged around the center of the receiving space, the groove wall of the second mounting groove extends outward from the bottom surface of the groove to the groove opening, the second mounting groove is provided with the first sealing ring, and the first mounting groove is located on the side of the second mounting groove closer to the center of the receiving space.

[0074] In a specific embodiment of this utility model, the battery further includes a first fastener, which connects the cover and the frame, and is located between the first mounting groove and the second mounting groove. The number of the first fasteners is multiple, and the multiple first fasteners are spaced apart around the center of the receiving space.

[0075] In a specific embodiment of this utility model, the second sealing ring has a receiving hole that extends through the first direction;

[0076] The battery pack also includes a spacer, which is disposed in the receiving hole, and the two ends of the spacer in the first direction are respectively connected to the first plate and the second mounting surface.

[0077] In a specific embodiment of this utility model, the number of receiving holes is multiple, and the multiple receiving holes are arranged at intervals around the center of the receiving space;

[0078] The number of the spacers is multiple, and one spacer is disposed in one receiving hole;

[0079] The distance fixing component includes a distance fixing part and a fixing part. The fixing part is fixedly connected to the frame. The distance fixing part is disposed in the receiving hole. The two ends of the distance fixing part in the first direction are respectively connected to the first plate and the second mounting surface. The side of the distance fixing part facing the first plate has a fixing hole, and the fixing hole extends into the fixing part.

[0080] The battery pack also includes a plurality of second fasteners, one of which is connected to the wall of one of the fixing holes to connect the first plate to the frame.

[0081] In a specific embodiment of this utility model, the frame has an annular third mounting groove, the third mounting groove is located on the third mounting surface, the third mounting groove is arranged around the center of the receiving space, the groove wall of the third mounting groove extends outward from the bottom surface of the groove to the groove opening, and the third mounting groove is provided with the third sealing ring.

[0082] In a specific embodiment of this utility model, the battery pack further includes a protective cover, the protective cover having an exhaust groove and an opening, the protective cover being connected to the second end, and the protective cover covering the second weight-reducing groove, the opening of the exhaust groove facing the second weight-reducing groove, the opening communicating with the exhaust groove, and the opening facing the side where the base plate assembly is located.

[0083] In a specific embodiment of this utility model, the exhaust seat has an exhaust chamber and an air inlet, and the air inlet connects the air collecting chamber and the exhaust chamber.

[0084] The second end has an air outlet, which is located on the bottom surface of the second weight reduction groove and is connected to the exhaust chamber;

[0085] The air inlet, the exhaust chamber, and the air outlet form the exhaust channel.

[0086] The present invention discloses a battery pack and electrical device, which, compared with the prior art, have the following advantages:

[0087] The battery pack of this utility model has a first side beam with an exhaust channel. The first side beam includes a first beam body, an exhaust seat, and a first reinforcing structure. The first beam body has a first weight-reducing groove. The exhaust seat is connected to the bottom surface of the first weight-reducing groove. The exhaust channel passes through the exhaust seat and the first beam body. The first reinforcing structure is connected to the first beam body and located in the first weight-reducing groove. The first weight-reducing groove enables the frame to be lightweight. In addition, since the exhaust channel in the first side beam is located in the exhaust seat, and the first reinforcing structure is provided in the area of ​​the first weight-reducing groove other than the exhaust seat, the first side beam has a certain strength, and the battery pack has good impact resistance. Attached Figure Description

[0088] Figure 1 This is a perspective view of the battery pack according to an embodiment of the present invention;

[0089] Figure 2 This is a perspective view of the battery pack from another angle according to an embodiment of this utility model;

[0090] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged diagram of A in the middle;

[0091] Figure 4 This is a front view of the first side beam in an embodiment of this utility model;

[0092] Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged diagram of B in the middle;

[0093] Figure 6This is a perspective view of the first side beam in an embodiment of this utility model;

[0094] Figure 7 This is a perspective view of another first side beam according to an embodiment of this utility model;

[0095] Figure 8 This is a top view of the battery pack of this utility model embodiment without the cover;

[0096] Figure 9 This is an embodiment of the present utility model. Figure 8 Enlarged diagram of C in the middle;

[0097] Figure 10 This is a top view of the battery pack without the cover and battery assembly according to an embodiment of the present invention;

[0098] Figure 11 This is an embodiment of the present utility model. Figure 10 Enlarged diagram of E in the middle;

[0099] Figure 12 This is a top view of another first partition of this utility model embodiment;

[0100] Figure 13 This is an embodiment of the present utility model. Figure 10 Sectional view of DD;

[0101] Figure 14 This is an embodiment of the present utility model. Figure 13 Enlarged diagram of F in the middle;

[0102] Figure 15 This is an embodiment of the present utility model. Figure 14 A magnified diagram of G in the middle;

[0103] Figure 16 This is a schematic diagram showing the fit between the frame, cover, first sealing ring, and first fastener in an embodiment of this utility model;

[0104] Figure 17 This is a schematic diagram showing the cooperation of the frame, the first plate, the second sealing ring, and the second fastener in an embodiment of this utility model;

[0105] Figure 18 This is an exploded view of the frame, base plate assembly, third partition, and elastic support component in an embodiment of this utility model.

[0106] Figure 19 This is a schematic diagram of the battery, base plate assembly, first separator, first sealing layer, third separator and elastic support member in accordance with an embodiment of the present invention;

[0107] Figure 20 This is a perspective view of the elastic support member according to an embodiment of the present utility model;

[0108] Figure 21 This is a bottom view of the second plate body according to an embodiment of the present utility model;

[0109] Figure 22 This is an embodiment of the present utility model. Figure 21 Enlarged schematic diagram of H in the middle;

[0110] Figure 23 This is a cross-sectional view of another second plate body according to an embodiment of the present invention;

[0111] Figure 24 This is a cross-sectional view of the first side beam at the exhaust seat in an embodiment of this utility model.

[0112] In the diagram, Z represents the first direction; X represents the second direction; Y represents the third direction; 10A represents the accommodating space; 10a represents the mounting space; 1 represents the base plate assembly; 1A represents the air collection chamber; 11 represents the first plate; 12 represents the second plate; 12A represents the exhaust port; 12B represents the second flow channel; 13 represents the boss; 13A represents the first flow channel; 131 represents the first connecting section; 132 represents the second connecting section; 1321 represents the first segment; 1322 represents the second segment; 1323 represents the third segment; 2 represents the frame; 201 represents the first mounting surface; 202 represents the second mounting surface; 203 represents the third mounting surface; 20A represents the first mounting groove; 2 represents the second mounting groove. 0B, Second mounting slot; 20C, Third mounting slot; 21, First side beam; 21A, Exhaust channel; 21B, First area; 21C, Second area; 211, First beam body; 2111, First end; 2111A, First weight-reducing groove; 2112, Second end; 2112A, Second weight-reducing groove; 2112B, Air outlet; 212, Exhaust seat; 212A, Exhaust chamber; 212B, Air inlet; 213, First reinforcing structure; 2131, First reinforcing rib; 2132, Second reinforcing rib; 214, Mounting seat; 22, Second side beam; 221, Second beam Main body; 2211, Third end; 2212, Fourth end; 2212A, Third weight reduction groove; 222, Second reinforcing structure; 2221, Third reinforcing rib; 2222, Fourth reinforcing rib; 3, Cover; 4, First explosion-proof valve; 5, Battery; 51, Battery body; 52, Second explosion-proof valve; 501, Battery pack; 5011, First wall surface; 5012, Second wall surface; 6, Adhesive layer; 7, First partition; 71, Weak part; 711, First piece; 711A, Mounting hole; 712, Second piece; 713, Connector; 8, Second partition; 9, First sealing layer ; 10. Second sealing layer; 20. Spacer strip; 30. Third spacer; 40. Elastic support member; 401. First support section; 401A. Through hole; 402. Second support section; 4021. Fourth section body; 4022. Fifth section body; 4023. Sixth section body; 50. First sealing ring; 60. Second sealing ring; 60A. Accommodating hole; 70. Third sealing ring; 80. First fastener; 90. Spacer; 901. Spacer part; 902. Fixing part; 90A. Fixing hole; 100. Second fastener; 200. Protective cover; 200A. Exhaust groove; 200B. Opening. Detailed Implementation

[0113] 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.

[0114] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0115] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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 application according to the specific circumstances.

[0116] In this application, unless otherwise expressly 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 being 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 being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0117] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0118] This application proposes an electrical device that includes a battery pack as described below. The battery pack is used to store and output electrical energy to provide power to the electrical device, which includes, but is not limited to, electric vehicles, drones, and power banks. Since the electrical device uses the battery pack described below, it also has the advantages of the battery pack described below, which will not be elaborated further in this application.

[0119] like Figures 1 to 24 As shown, a preferred embodiment of the present invention provides a battery pack (5-cell battery) having two perpendicular directions: a first direction Z, a second direction X, and a third direction Y. The battery pack includes a base plate assembly 1, a frame 2, and a cover 3. In the first direction Z, the base plate assembly 1 and the cover 3 are respectively connected to both ends of the frame 2, forming an accommodating space 10A. The base plate assembly 1 forms a gas collection chamber 1A. The frame 2 includes a first side beam 21, which has an exhaust channel 21A. The first side beam 21 includes a first beam body 211, an exhaust seat 212, and a first reinforcing structure 213. In the second direction... On X, the first beam body 211 has a first end 2111 and a second end 2112 facing each other. The first end 2111 faces the center side of the receiving space 10A and has a first weight-reducing groove 2111A. The depth direction of the first weight-reducing groove 2111A is the same as the second direction X. The exhaust seat 212 is connected to the bottom surface of the first weight-reducing groove 2111A. The first reinforcing structure 213 is disposed in the first weight-reducing groove 2111A and connected to the first beam body 211. The exhaust channel 21A passes through the exhaust seat 212 and the first beam body 211, and the exhaust channel 21A is connected to the air collection chamber 1A.

[0120] Specifically, the first side beam 21 of the frame 2 has an exhaust channel 21A. The first side beam 21 includes a first beam body 211, an exhaust seat 212, and a first reinforcing structure 213. The first beam body 211 has a first weight-reducing groove 2111A. The exhaust seat 212 is connected to the bottom surface of the first weight-reducing groove 2111A. The exhaust channel 21A passes through the exhaust seat 212 and the first beam body 211. The first reinforcing structure 213 is connected to the first beam body 211 and is located in the first weight-reducing groove 2111A. The first weight-reducing groove 2111A enables the frame 2 to be lightweight. In addition, since the exhaust channel 21A in the first side beam 21 is located in the exhaust seat 212, and the first reinforcing structure 213 is provided in the area of ​​the first weight-reducing groove 2111A except for the area of ​​the exhaust seat 212, the first side beam 21 has a certain strength, and the battery pack 5 has good impact resistance.

[0121] In some embodiments, such as Figure 6 As shown, in the second direction X, the length of the exhaust seat 212 is greater than the lengths of the first reinforcing rib 2131 and the second reinforcing rib 2132 described below; as Figure 7As shown, the side of the exhaust seat 212 facing away from the second end 2112 can be flush with the side of the first reinforcing rib 2131 facing away from the second end 2112 and the side of the second reinforcing rib 2132 facing away from the second end 2112; both of the above-mentioned exhaust seats 212 can play the role of exhaust, and this application does not limit them.

[0122] In this embodiment, as Figure 6 and Figure 7 As shown, the first end 2111 has a first weight-reducing groove 2111A. Since the exhaust seat 212 is located on the bottom surface of the first weight-reducing groove 2111A, therefore, as Figure 4 and Figure 5 As shown, in the second direction X, the volume of the first side beam 21 at the location where the exhaust seat 212 is located is relatively large. Based on this, in the second direction X, the orthographic projection of the exhaust seat 212 on the bottom surface of the first weight-reducing groove 2111A is the first projection, and the area of ​​the first projection is the first area 21B. The second end 2112 has a second weight-reducing groove 2112A, the depth direction of the second weight-reducing groove 2112A is the same as the second direction X, and the opening area of ​​the second weight-reducing groove 2112A is the second area 21C. In the second direction X, the opening of the second weight-reducing groove 2112A is directly opposite to the first projection, and the second area 21C is smaller than the first area 21B. The setting of the second weight-reducing groove 2112A reduces the volume of the first side beam 21 at the location where the exhaust seat 212 is located, which can further reduce the weight of the first side beam 21, making the frame 2 lighter.

[0123] The exhaust seat 212 is a cuboid or cube. The first area 21B is measured by measuring the first length and the first width of the exhaust seat 212 with a length measuring tool. The product of the first length and the first width is the first area 21B. The opening of the second weight-reducing groove 2112A is rectangular or square. The second area 21C is measured by measuring the second length and the second width of the opening of the second weight-reducing groove 2112A with a length measuring tool. The product of the second length and the second width is the second area 21C.

[0124] In other embodiments, the shape of the first projection of the exhaust seat 212 and the shape of the opening of the second weight reduction groove 2112A can also be other geometric shapes. In this case, the corresponding first area 21B and second area 21C can be obtained by conventional area calculation methods, which will not be elaborated in this application.

[0125] like Figure 5 and Figure 14As shown, the first side beam 21 also includes a mounting base 214, which is located in the second weight-reducing groove 2112A and connected to the first beam body 211; the exhaust channel 21A passes through the exhaust seat 212, the first beam body 211 and the mounting base 214; the battery pack 5 also includes a first explosion-proof valve 4, which is connected to the mounting base 214 and seals the exhaust channel 21A. Specifically, the mounting base 214 is equivalent to increasing the volume of the first side beam 21, which can strengthen the first side beam 21 while realizing the installation of the first explosion-proof valve 4.

[0126] As one specific implementation of this embodiment, such as Figure 6 and Figure 7 As shown, the first reinforcing structure 213 includes a first reinforcing rib 2131 and a second reinforcing rib 2132. The first reinforcing rib 2131 is strip-shaped, and its length direction intersects with the first direction Z. The first reinforcing rib 2131 is connected to the bottom surface of the first weight-reducing groove 2111A. There are multiple first reinforcing ribs 2131, which are arranged at intervals along the first direction Z. The second reinforcing rib 2132 is strip-shaped, and its length direction intersects with the third direction Y. The second reinforcing rib 2132 is connected to the bottom surface of the first weight-reducing groove 2111A. There are multiple second reinforcing ribs 2132, which are arranged at intervals along the third direction Y. One second reinforcing rib 2132 intersects with at least a portion of the first reinforcing ribs 2131. This type of first reinforcing structure 213 has a simple structure and can give the first side beam 21 sufficient strength, so that the battery pack 5 has good impact resistance.

[0127] like Figure 2 and Figure 3 As shown, the frame 2 also includes a second side beam 22. The first side beam 21 and the second side beam 22 are spaced apart along the second direction X. The second side beam 22 includes a second beam body 221 and a second reinforcing structure 222. In the second direction X, the second beam body 221 has a third end 2211 and a fourth end 2212 facing each other. The third end 2211 faces the center side of the accommodating space 10A. The fourth end 2212 has a third weight-reducing groove 2212A. The depth direction of the third weight-reducing groove 2212A is the same as that of the second direction X. The second reinforcing structure 222 is disposed in the third weight-reducing groove 2212A and connected to the second beam body 221. Based on the arrangement of the third weight-reducing groove 2212A and the second reinforcing structure 222, the second side beam 22 has the characteristics of high strength and light weight. Based on the high strength of the first side beam 21 and the second side beam 22, the battery pack has higher impact resistance.

[0128] like Figure 8 and Figure 9As shown, the battery pack 5 also includes batteries 5 and an adhesive layer 6; there are multiple batteries 5, which are disposed in the receiving space 10A and arranged in an array to form a battery pack 501. In the battery pack 501, the multiple batteries 5 form multiple rows in the second direction X and multiple columns in the third direction Y; in the second direction X, the battery pack 501 has opposing first wall surfaces 5011 and second wall surfaces 5012; the first wall surface 5011 faces the first end 2111, and the first wall surface 5011 is spaced apart from the first end 2111, and the first wall surface 5011 and the first end 2111 are... An installation space 10a is formed between 2111; the second wall surface 5012 faces the third end 2211, and the second wall surface 5012 is connected to the end face of the third end 2211 through the adhesive layer 6; specifically, the end faces of the second wall surface 5012 and the third end 2211 are both flat. When the second side beam 22 is subjected to force or the battery 5 expands, since the end faces of the second wall surface 5012 and the third end are flat, the force on each battery 5 in the battery pack 501 is relatively uniform, and the battery 5 will not have stress concentration in some positions, so the reliability of the battery 5 is relatively high.

[0129] In addition, since an installation space 10a is formed between the first wall surface 5011 and the first end 2111, the installation space 10a can be used to install other devices of the battery pack. For example, the slave control module of the battery management system is installed in the installation space 10a. At this time, at least one of the first reinforcing rib 2131 and the second reinforcing rib 2132 can be used as a mounting connection component to connect with the slave control module. There is no need to set up other structures for the slave control module to install, which can save space and is conducive to the lightweight design of the battery pack.

[0130] In this embodiment, as Figure 3 As shown, the second reinforcing structure 222 includes a third reinforcing rib 2221 and a fourth reinforcing rib 2222. The third reinforcing rib 2221 is strip-shaped, and its length direction intersects with the first direction Z. The third reinforcing rib 2221 is connected to the bottom surface of the second weight-reducing groove 2112A. There are multiple third reinforcing ribs 2221, which are spaced apart along the first direction Z. The fourth reinforcing rib 2222 is strip-shaped, and its length direction intersects with the third direction Y. The fourth reinforcing rib 2222 is connected to the bottom surface of the second weight-reducing groove 2112A. There are multiple fourth reinforcing ribs 2222, which are spaced apart along the third direction Y. One fourth reinforcing rib 2222 intersects with at least a portion of the third reinforcing rib 2221. This type of second reinforcing structure 222 has a simple structure and can give the second side beam 22 sufficient strength, so that the battery pack 5 has good impact resistance.

[0131] like Figures 13 to 14As shown, the base plate assembly 1 includes a first plate 11 and a second plate 12. Both the first plate 11 and the second plate 12 are connected to the frame 2, and the first plate 11 and the second plate 12 are spaced apart along the first direction Z, forming a gas collecting chamber 1A between the first plate 11 and the second plate 12. The second plate 12 has multiple exhaust holes 12A extending along the first direction Z, and the exhaust holes 12A communicate with the gas collecting chamber 1A. The battery 5 includes a battery body 51 and a second explosion-proof valve 52. The second explosion-proof valve 52 is connected to the side of the battery body 51 facing the second plate 12. Each second explosion-proof valve 52 faces one exhaust hole 12A. Specifically, the second explosion-proof valve 52 is used to protect the battery body 51 from excessive internal pressure. When the internal pressure of the battery pack 51 reaches a certain level, the second explosion-proof valve 52 will activate, releasing ejected material to balance the internal pressure of the battery pack 51, thereby preventing the battery 5 from exploding and ensuring the safety performance of the battery 5. In practical applications, when the battery pack 5 is used in electric vehicles, the cover 3 of the battery pack 5 faces the passenger compartment and the base plate assembly 1 faces the ground. Therefore, since the second explosion-proof valve 52 is set towards the base plate assembly 1, when the second explosion-proof valve 52 is ejected, it will not directly eject into the passenger compartment, improving safety and reducing harm to the passenger compartment. The gas ejected from the battery 5 enters the gas collection chamber 1A through the exhaust port 12A and is discharged outside the battery pack 5 through the exhaust channel 21A and the first explosion-proof valve 4.

[0132] Because the substance ejected from the second explosion-proof valve 52 of battery 5 has high-temperature and high-pressure characteristics, it will splash and spread after entering the gas collecting chamber 1A, and its temperature and pressure will decrease. However, without protective measures, if other normal batteries 5 are directly connected to the gas collecting chamber 1A, the ejected substance will come into contact with the other normal batteries 5, causing secondary damage. This could lead to the other normal batteries 5 being thermally affected or damaging the second explosion-proof valve 52, thus causing the other batteries 5 to also experience thermal runaway. Therefore, if... Figure 11 As shown, the battery pack 5 also includes multiple first separators 7, each with a weak point 71. These first separators 7 are positioned between the battery pack 501 and the second plate 12, with each first separator 7 corresponding to one battery body 51. In the first direction Z, both ends of the first separator 7 contact the battery body 51 and the second plate 12, respectively. The vent 12A, the weak point 71, and the second explosion-proof valve 52 are arranged along the first direction Z. The first separators 7 are made of high-temperature resistant and insulating materials, such as mica or other materials commonly used in the field. Specifically, when the second explosion-proof valve 52 is activated, the high-temperature gas emitted will break through the weak point 71 and enter the vent 12A. The purpose of the first separators 7 is to act as a barrier, preventing substances emitted by the second explosion-proof valve 52 of a single battery 5 from affecting other normal batteries 5 in the surrounding area through the gas collecting chamber 1A and the vent 12A, thus improving the safety of the battery pack 5.

[0133] In some embodiments, such as Figure 12 As shown, the first partition 7 has a groove, which forms a weak part 71. When the second explosion-proof valve 52 is ejected, the groove breaks open so that the ejected material can pass through the exhaust hole 12A and enter the gas collection chamber 1A.

[0134] In other embodiments, such as Figure 11 As shown, the first partition 7 includes a first piece 711, a second piece 712, and a connecting body 713. The first piece 711 has a mounting hole 711A extending through in the first direction Z. The second piece 712 is disposed in the mounting hole 711A. There are multiple connecting bodies 713. The connecting bodies 713 are located between the outer peripheral surface of the second piece 712 and the hole wall surface of the mounting hole 711A, and the connecting bodies 713 connect the second piece 712 and the hole wall surface of the mounting hole 711A. Multiple connecting bodies 713 are arranged circumferentially around the second piece 712 at intervals. The second piece 712 and the connecting bodies 713 form a weak part 71. When the second explosion-proof valve 52 is ejected, the ejected material can impact the weak part 71 under high pressure, and the connecting body 713 is disconnected. Thus, the ejected material passes through the exhaust hole 12A and enters the gas collecting chamber 1A. The first partition 7 with this structure is simple in structure, easy to process, and the weak part 71 is more easily broken by high-pressure material.

[0135] Furthermore, such as Figure 11 As shown, the battery pack 5 also includes a second separator 8. In the third direction Y, two adjacent first separators 7 are connected by the second separator 8. Multiple first separators 7 are connected in a row. Thus, a second separator 8 is provided between two adjacent batteries 5. At this time, the second separator 8 plays a blocking role, blocking the substances ejected by the second explosion-proof valve 52 of a single battery 5, so as to avoid affecting other normal batteries 5 in the vicinity. It can achieve a better blocking effect in conjunction with the first separator 7.

[0136] In some embodiments, as shown in 19, the battery pack 5 further includes a plurality of first sealing layers 9, which are disposed between the battery pack 501 and the second plate 12. In the second direction X, a single first sealing layer 9 fills between two adjacent rows of first spacers 7. In the first direction Z, the two ends of the first sealing layer 9 contact the second plate 12 and the battery body 51, respectively. Specifically, the first sealing layer 9 provides a fixed connection for the battery 5 and also ensures the sealing of the battery 5 when the valve is opened, preventing the ejected material from leaking through the connection between the battery 5 and the first spacers 7, the second spacers 8 and the second plate 12, thereby avoiding affecting other batteries 5 or components in the vicinity and preventing fire or heat spread. The first sealing layer 9 ensures that when the second explosion-proof valve 52 of the battery 5 is opened, the ejected material can only enter the exhaust chamber, ensuring the safety of the battery pack 5.

[0137] In other embodiments, such as Figure 10 and Figure 11 As shown, the battery pack 5 also includes multiple second sealing layers 10 and multiple spacers 20. The multiple second sealing layers 10 and multiple spacers 20 are all disposed between the battery pack 501 and the second plate 12. The length direction of the spacers 20 is the same as the third direction Y, and the multiple spacers 20 are spaced apart along the second direction X. A single row of first spacers 7 is located between two adjacent spacers 20. The second sealing layer 10 is an adhesive layer 6, and the spacers 20 and the single row of first spacers 7, as well as between two adjacent spacers 20, are filled with the second sealing layer 10. In the first direction Z, the two ends of the spacers 20 are connected to the battery body 51 and the second plate 12, respectively, and the two ends of the second sealing layer 10 are connected to the battery body 51 and the second plate 12, respectively. The second sealing layer 10 has the same function as the first sealing layer 9 described above. On the one hand, it provides a fixed connection to the battery 5, and on the other hand, it ensures the sealing of the battery 5 when it is ejected, preventing the ejected material from leaking through the connection between the battery 5 and the first separator 7, the second separator 8 and the second plate 12. This application will not elaborate on this further. The second sealing layer 10 is an adhesive layer 6. Therefore, the spacer 20 can play a limiting role, so that the adhesive layer 6 has a certain adhesive thickness and can be relatively full, which can improve the connection effect and sealing performance of the adhesive layer 6.

[0138] Preferred, such as Figure 11 and 12 As shown, in the second direction X, the length of the first partition 7 is greater than that of the second partition 8. The structure is simple, the material usage is reduced, and production costs are saved.

[0139] In this application, as Figure 18 As shown, the battery pack 5 also includes multiple third separators 30. The third separators 30 are strip-shaped and are disposed in the gas collecting chamber 1A. The third separators 30 are connected to the first plate 11, and the multiple third separators 30 are arranged at intervals along the second direction X. Among them, a row of second explosion-proof valves 52 faces one third separator 30. Specifically, when the battery 5 sprays out, the high-temperature and high-pressure material enters the gas collecting chamber 1A through the exhaust port 12A and will directly impact the first plate 11. Since the row of second explosion-proof valves 52 faces one third separator 30, the third separator 30 covers the area that will be impacted as much as possible, which can reduce the strength and toughness requirements of the first plate 11. The third separator 30 can absorb the impact and insulate against the high temperature, thereby improving the safety of the entire pack. The third separator 30 is made of a high-temperature resistant and insulating material, such as mica or other materials commonly used in the art. This application does not limit the use of such materials.

[0140] In this application, as Figure 18As shown, the battery pack 5 also includes an elastic support member 40, which is disposed in the gas collection cavity 1A. In the first direction Z, one end of the elastic support member 40 is connected to the first plate 11 and the other end is connected to the second plate 12. Specifically, on the one hand, the elastic support member 40 plays a supporting role. Since the surfaces of the first plate 11 and the second plate 12 are relatively large, an elastic support member 40 is needed to abut against the two to ensure that the space between them does not collapse. Moreover, the connection between the two by the elastic support member 40 can also improve the overall structural strength. On the other hand, when the first plate 11 receives external impact force, the elastic support member 40 can generate elastic deformation itself, which can play a role in mitigating and absorbing the impact force, reducing the external force transmitted to the battery 5, and ensuring the safety performance of the battery 5.

[0141] like Figure 18 As shown, the elastic support 40 is strip-shaped, and the length direction of the elastic support 40 is the same as the third direction Y. There are multiple elastic support 40s. In the second direction X, at least one elastic support 40 is provided between two adjacent third partitions 30. This structure ensures the overall structural strength of the battery pack. In addition, the elastic support 40 is made of high temperature resistant material to avoid the ejected substances affecting the performance.

[0142] like Figure 20 As shown, the elastic support member 40 includes multiple first support segments 401 and multiple second support segments 402. The multiple first support segments 401 are spaced apart along a third direction Y, and two adjacent first support segments 401 are connected by a second support segment 402. The first support segments 401 are connected to the first plate 11, and the second support segments 402 protrude relative to the first plate 11 towards the second plate 12 to form an arched structure. The second support segments 402 are connected to the second plate 12. Because the second support segments 402 of the elastic support member 40 protrude relative to the first plate 11 towards the second plate 12... The base plate assembly 1 forms an arched structure. Therefore, if the base plate assembly 1 is impacted in the first direction Z, the second support section 402 of the arched structure will compress and deform in the first direction Z, thereby absorbing the impact. Based on this, the battery pack 5 has good impact resistance. In addition, since the base plate assembly 1 ensures the impact resistance of the battery pack 5 through the elastic support member 40, the thickness and density of the first plate 11 and the second plate 12 do not need to be too large. Therefore, the weight of the base plate assembly 1 is relatively light. That is, the battery pack 5 of this application has the characteristics of good impact resistance and light weight.

[0143] Furthermore, as shown in the figure, the base plate assembly 1 also includes a boss 13, which is located in the gas collection chamber 1A. The boss 13 is connected to the second plate 12. The boss 13 is strip-shaped and extends along the second direction X. There are multiple bosses 13, which are arranged at intervals along the third direction Y. In the third direction Y, the bosses 13 and the exhaust holes 12A are alternately arranged. The bosses 13 have first flow channels 13A, and each first flow channel 13A is interconnected. In the third direction Y, the second support section 402 is located between two adjacent bosses 13. With this structure, the base plate assembly 1, due to the second plate 12 and the bosses 13, provides a better performance. Platform 13 is connected and forms a first flow channel 13A, thereby enabling the battery 5 to be cooled by injecting coolant into the first flow channel 13A. The battery pack does not need to be equipped with a separate liquid cooling plate, making the battery pack structure simpler and facilitating the lightweight design of the battery pack. In addition, the coolant in the first flow channel 13A can also cool the high-temperature material ejected by the second explosion-proof valve 52 when the battery 5 experiences thermal runaway, actively reducing the temperature of the gas generated by thermal runaway and preventing the flammable gas generated by thermal runaway from igniting outside the battery pack due to its still high temperature and contact with oxygen in the air, which meets the ignition conditions.

[0144] like Figure 21 and Figure 22 As shown, the boss 13 includes multiple first connecting sections 131 and multiple second connecting sections 132. The multiple first connecting sections 131 are spaced apart along the second direction X, and two adjacent first connecting sections 131 are connected by a second connecting section 132. The first flow channel 13A passes through the first connecting sections 131 and the second connecting section 132. The second connecting section 132 protrudes relative to the first connecting section 131 along the third direction Y. In the second direction X, an exhaust hole 12A is provided between two adjacent second connecting sections 132. In the third direction Y, the second support section 402 is located between two adjacent second connecting sections 132. Since the second connecting section 132 protrudes relative to the first connecting section 131 along the third direction Y, the first flow channel 13A has a relatively wide range, that is, a wide cooling range. In the first direction Z, the second connecting section 132 is located between two batteries 5, which can better cool the batteries 5.

[0145] Furthermore, such as Figure 22As shown, the second connecting segment 132 includes a first segment 1321, a second segment 1322, and a third segment 1323. The first segment 1321 is straight and its length direction is the same as the second direction X. The length directions of the second segment 1322 and the third segment 1323 are oblique to the third direction Y. The first segment 1321 is connected to the second segment 1322 and the third segment 1323 at both ends of its length direction, respectively. The first segment 1321 is connected to the first connecting segment 131 through the second segment 1322 and the third segment 1323. Specifically, since the first segment 1321 is straight, the flow resistance of the coolant is relatively low when it flows through the first segment 1321, and its flow process is relatively smooth, resulting in a good cooling effect on the battery 5.

[0146] like Figure 20 As shown, the second support segment 402 includes a fourth segment 4021, a fifth segment 4022, and a sixth segment 4023. The fourth segment 4021 is straight and its length direction is the same as the second direction X. The length directions of the fifth segment 4022 and the sixth segment 4023 are both oblique to the third direction Y. The two ends of the fourth segment 4021 along its length direction are connected to the fifth segment 4022 and the sixth segment 4023, respectively. Among the second connecting segment 132 and the second support segment 402 adjacent to each other in the third direction Y, the first segment 1321, the second segment 1322, and the third segment 1323 form a slot, and the fourth segment... Body 4021, fifth body 4022, and sixth body 4023 are engaged in the slot. First body 1321 and fourth body 4021 are arranged along the third direction Y, second body 1322 and fifth body 4022 are arranged along the third direction Y, and third body 1323 and sixth body 4023 are arranged along the third direction Y. Specifically, the second support section 402 and the second connecting section 132 are roughly trapezoidal. The second support section 402 adopts a shape that matches the second connecting section 132, so that when the battery pack is subjected to impact, the second support section 402 can be firmly engaged with the second connecting section 132, thereby better transmitting the impact force.

[0147] Furthermore, the first support section 401 has a through hole 401A extending along the first direction Z. By providing the through hole 401A, the weight of the elastic support member 40 can be reduced on the one hand, and the stress can be dispersed and deformation absorbed on the other hand. When the elastic support member 40 is subjected to an impact force in the first direction Z, the through hole 401A can provide a deformation space in the first direction Z to absorb and disperse the stress.

[0148] In other embodiments, such as Figure 23As shown, the second plate 12 has a second flow channel 12B, thereby enabling the battery 5 to be cooled by injecting coolant into the second flow channel 12B. The battery pack does not need to be equipped with a separate liquid cooling plate, making the battery pack structure simpler and facilitating the lightweight design of the battery pack. Moreover, the coolant in the second flow channel 12B can also cool the high-temperature material ejected by the second explosion-proof valve 52 when the battery 5 experiences thermal runaway, actively reducing the temperature of the gas generated by thermal runaway. This prevents the flammable gas generated by thermal runaway from igniting outside the battery pack due to its still high temperature and contact with oxygen in the air, which would meet the ignition conditions.

[0149] In this application, as Figures 14 to 16 As shown, the battery pack 5 also includes a first sealing ring 50, a second sealing ring 60, and a third sealing ring 70; the frame 2 has a first mounting surface 201, a second mounting surface 202, and a third mounting surface 203 arranged around the center of the receiving space 10A. The first mounting surface 201 faces the cover 3, while the second mounting surface 202 and the third mounting surface 203 both face away from the cover 3. The first mounting surface 201 is sealed to the cover 3 through the first sealing ring 50, the second mounting surface 202 is sealed to the first plate 11 through the second sealing ring 60, and the third mounting surface 203 is sealed to the second plate 12 through the third sealing ring 70. This ensures the sealing performance of the battery pack 5 and protects it from external environmental disturbances such as dust and moisture, resulting in high safety performance of the battery pack 5.

[0150] Furthermore, such as Figure 16 As shown, the frame 2 has an annular first mounting groove 20A, which is located on the first mounting surface 201. The first mounting groove 20A is arranged around the center of the receiving space 10A. The groove wall of the first mounting groove 20A extends outward from the bottom surface to the opening. The first mounting groove 20A is provided with a first sealing ring 50. With this structure, the groove sidewall of the first mounting groove 20A extends obliquely. When the cover 3 compresses the first sealing ring 50, the first sealing ring 50 deforms and can extend towards the groove sidewall of the first mounting groove 20A. Since the depth of the first mounting groove 20A is determined, the compression amount of the first sealing ring 50 is relatively determined. Therefore, the first sealing ring 50 has the characteristics of long service life and good sealing effect.

[0151] Furthermore, such as Figure 16As shown, the frame 2 has an annular second mounting groove 20B, which is located on the first mounting surface 201. The second mounting groove 20B is arranged around the center of the receiving space 10A. The groove wall of the second mounting groove 20B extends outward from the bottom surface to the opening. The second mounting groove 20B is provided with a first sealing ring 50. The first mounting groove 20A is located on the side of the second mounting groove 20B closer to the center of the receiving space 10A. That is, the cover 3 and the first mounting surface 201 are sealed by two first sealing rings 50, resulting in a better sealing effect.

[0152] Among them, such as Figure 16 As shown, the battery 5 also includes a first fastener 80, which connects the cover 3 and the frame 2. The first fastener 80 is located between the first mounting groove 20A and the second mounting groove 20B. Multiple first fasteners 80 are spaced apart around the center of the receiving space 10A. Specifically, the first fasteners 80 are located between the first mounting groove 20A and the second mounting groove 20B. Thus, the cover 3 can press the two first sealing rings 50 together using the first fasteners 80. The structure is simple and easy to install.

[0153] like Figure 17 As shown, the second sealing ring 60 has a receiving hole 60A extending through the first direction Z; the battery pack 5 also includes a spacer 90, which is disposed in the receiving hole 60A. The two ends of the spacer 90 in the first direction Z are respectively connected to the first plate 11 and the second mounting surface 202. The spacer 90 can limit the compression of the second sealing ring 60. That is, when the first plate 11 presses the second sealing ring 60 onto the second mounting surface 202, the thickness of the second sealing ring 60 is limited based on the spacer 90. Thus, the second sealing ring 60 can be compressed to a suitable thickness. The second sealing ring 60 has the characteristics of high life and good sealing effect.

[0154] Furthermore, such as Figure 17As shown, there are multiple receiving holes 60A, which are arranged at intervals around the center of the receiving space 10A; there are multiple spacers 90, each spacer 90 is disposed in one receiving hole 60A; wherein, the spacer 90 includes a spacer portion 901 and a fixing portion 902, the fixing portion 902 is fixedly connected to the frame 2, the spacer portion 901 is disposed in the receiving hole 60A, the two ends of the spacer portion 901 in the first direction Z are respectively connected to the first plate 11 and the second mounting surface 202, and the side of the spacer portion 901 facing the first plate 11 has a fixing hole 90A, which extends into the fixing portion 902; Pool 5 also includes multiple second fasteners 100. One second fastener 100 is connected to the wall of a fixing hole 90A to connect the first plate 11 to the frame 2. That is, the spacer 90 serves both to limit the thickness of the second sealing ring 60 and to connect the second fasteners 100. Its structure is simple. Based on this structure of the spacer 90, the second fasteners 100 can connect the first plate 11 to the frame 2 and compress the second sealing ring 60 to a suitable thickness, thereby making the first plate 11 and the frame 2 stably connected and giving the second sealing ring 60 the characteristics of long service life and good sealing effect.

[0155] like Figure 14 and 15 As shown, the frame 2 has an annular third mounting groove 20C, which is located on the third mounting surface 203. The third mounting groove 20C is arranged around the center of the receiving space 10A. The groove wall of the third mounting groove 20C extends outward from the bottom surface to the opening. The third mounting groove 20C is provided with a third sealing ring 70. In this structure, the groove sidewall of the third mounting groove 20C extends obliquely. When the second plate 12 compresses the third sealing ring 70, the third sealing ring 70 deforms and can extend towards the groove sidewall of the third mounting groove 20C. Since the depth of the third mounting groove 20C is determined, the compression amount of the third sealing ring 70 is relatively determined. Therefore, the third sealing ring 70 also has the characteristics of long service life and good sealing effect.

[0156] like Figure 1 and Figure 14As shown, the battery pack 5 also includes a protective cover 200, which has an exhaust groove 200A and an opening 200B. The protective cover 200 is connected to the second end 2112 and covers the second weight reduction groove 2112A. The opening of the exhaust groove 200A faces the second weight reduction groove 2112A. The opening 200B is connected to the exhaust groove 200A and faces the side where the base plate assembly 1 is located. That is, the gas ejected through the first explosion-proof valve 4 is ejected towards the side where the base plate assembly 1 is located. Specifically, the design of the protective cover 200 can prevent external interference to the first explosion-proof valve 4. When this type of battery pack 5 is applied to an electric vehicle, foreign objects such as stones splashed up by the wheel during vehicle operation can be blocked by the protective cover 200, avoiding impact on the first explosion-proof valve 4 and causing accidental valve opening. The structure of the battery pack 5 is more reliable.

[0157] In this application, as Figure 24 As shown, the exhaust seat 212 has an exhaust chamber 212A and an air inlet 212B, with the air inlet 212B connecting the gas collecting chamber 1A and the exhaust chamber 212A; the second end 2112 has an air outlet 2112B, which is located on the bottom surface of the second weight reduction groove 2112A and is connected to the exhaust chamber 212A; wherein, the air inlet 212B, the exhaust chamber 212A, and the air outlet 2112B form an exhaust channel 21A; this type of exhaust seat has a simple structure, is easy to process, and can effectively realize the emission of gas; wherein, the mounting base 214 is provided with an exhaust through hole, which is connected to the air outlet 2112B, and the exhaust through hole, the air inlet 212B, the exhaust chamber 212A, and the air outlet 2112B form an exhaust channel 21A.

[0158] 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 (Z) and second direction (X), characterized in that, It includes a base plate assembly (1), a frame (2), and a cover (3); In the first direction (Z), the base plate assembly (1) and the cover (3) are respectively connected to both ends of the frame (2), and the base plate assembly (1), the frame (2) and the cover (3) form an accommodating space (10A); The base plate assembly (1) has an air collection chamber (1A); The frame (2) includes a first side beam (21) having an exhaust channel (21A); The first side beam (21) includes a first beam body (211), an exhaust seat (212), and a first reinforcing structure (213). In the second direction (X), the first beam body (211) has a first end (2111) and a second end (2112) facing each other. The first end (2111) faces the center side of the receiving space (10A). The first end (2111) has a first weight-reducing groove (2111A). The depth direction of the first weight-reducing groove (2111A) is the same as that in the second direction (X). The exhaust seat (212) is connected to the bottom surface of the first weight reduction groove (2111A); The first reinforcing structure (213) is disposed in the first weight-reducing groove (2111A) and connected to the first beam body (211); The exhaust channel (21A) passes through the exhaust seat (212) and the first beam body (211), and the exhaust channel (21A) is connected to the gas collection chamber (1A).

2. The battery pack according to claim 1, characterized in that, In the second direction (X), the orthographic projection of the exhaust seat (212) on the bottom surface of the first weight reduction groove (2111A) is the first projection, and the area of ​​the first projection is the first area (21B). The second end (2112) has a second weight-reducing groove (2112A), the depth direction of the second weight-reducing groove (2112A) is the same as the second direction (X), and the groove area of ​​the second weight-reducing groove (2112A) is the second area (21C). In the second direction (X), the opening of the second weight-reducing groove (2112A) faces the first projection, and the second area (21C) is smaller than the first area (21B).

3. The battery pack according to claim 2, characterized in that, The first side beam (21) also includes a mounting base (214), which is disposed in the second weight-reducing groove (2112A) and connected to the first beam body (211); The exhaust channel (21A) passes through the exhaust seat (212), the first beam body (211), and the mounting seat (214); The battery pack also includes a first explosion-proof valve (4), which is connected to the mounting base (214) and seals the exhaust passage (21A).

4. The battery pack according to claim 1, characterized in that, The battery pack also has a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) intersect each other; The first reinforcing structure (213) includes a first reinforcing rib (2131) and a second reinforcing rib (2132); The first reinforcing rib (2131) is strip-shaped, and the length direction of the first reinforcing rib (2131) intersects the first direction (Z). The first reinforcing rib (2131) is connected to the bottom surface of the first weight-reducing groove (2111A). There are multiple first reinforcing ribs (2131), and the multiple first reinforcing ribs (2131) are arranged at intervals along the first direction (Z). The second reinforcing rib (2132) is strip-shaped, and its length direction intersects with the third direction (Y). The second reinforcing rib (2132) is connected to the bottom surface of the first weight-reducing groove (2111A). There are multiple second reinforcing ribs (2132), which are arranged at intervals along the third direction (Y). One second reinforcing rib (2132) intersects with at least a portion of the first reinforcing rib (2131).

5. The battery pack according to claim 2, characterized in that, The frame (2) further includes a second side beam (22), and the first side beam (21) and the second side beam (22) are spaced apart along the second direction (X); The second side beam (22) includes a second beam body (221) and a second reinforcing structure (222); In the second direction (X), the second beam body (221) has opposing third end (2211) and fourth end (2212), the third end (2211) facing the center side of the receiving space (10A); The fourth end (2212) has a third weight-reducing groove (2212A), the depth direction of which is the same as the second direction (X); The second reinforcing structure (222) is located inside the third weight-reducing groove (2212A) and connected to the second beam body (221).

6. The battery pack according to claim 5, characterized in that, The battery pack also has a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) intersect each other; The battery pack also includes a battery (5) and an adhesive layer (6); The number of batteries (5) is multiple, and the multiple batteries (5) are disposed in the accommodating space (10A) and arranged in an array to form a battery pack (501). In the battery pack (501), the multiple batteries (5) form multiple rows in the second direction (X) and multiple columns in the third direction (Y). In the second direction (X), the battery pack (501) has opposing first wall (5011) and second wall (5012); The first wall surface (5011) faces the first end (2111), the first wall surface (5011) and the first end (2111) are spaced apart, and an installation space (10a) is formed between the first wall surface (5011) and the first end (2111); The second wall surface (5012) faces the third end (2211), and the second wall surface (5012) is connected to the end face of the third end (2211) through the adhesive layer (6).

7. The battery pack according to claim 5, characterized in that, The battery pack also has a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) intersect each other; The second reinforcing structure (222) includes a third reinforcing rib (2221) and a fourth reinforcing rib (2222); The third reinforcing rib (2221) is strip-shaped, and the length direction of the third reinforcing rib (2221) intersects the first direction (Z). The third reinforcing rib (2221) is connected to the bottom surface of the second weight-reducing groove (2112A). There are multiple third reinforcing ribs (2221), and the multiple third reinforcing ribs (2221) are arranged at intervals along the first direction (Z). The fourth reinforcing rib (2222) is strip-shaped, and its length direction intersects with the third direction (Y). The fourth reinforcing rib (2222) is connected to the bottom surface of the second weight-reducing groove (2112A). There are multiple fourth reinforcing ribs (2222), which are arranged at intervals along the third direction (Y). One fourth reinforcing rib (2222) intersects with at least a portion of the third reinforcing rib (2221).

8. The battery pack according to claim 6, characterized in that, The base plate assembly (1) includes a first plate (11) and a second plate (12). The first plate (11) and the second plate (12) are both connected to the frame (2). The first plate (11) and the second plate (12) are spaced apart along the first direction (Z). The air collection cavity (1A) is formed between the first plate (11) and the second plate (12). The second plate (12) has a plurality of exhaust holes (12A) that penetrate along the first direction (Z). The exhaust holes (12A) are connected to the air collection cavity (1A). The battery includes a battery body (51) and a second explosion-proof valve (52), the second explosion-proof valve (52) being connected to the side of the battery body (51) facing the second plate (12); One of the second explosion-proof valves (52) faces one of the vent ports (12A).

9. The battery pack according to claim 8, characterized in that, The battery pack also includes a plurality of first separators (7), each first separator (7) having a weak portion (71); Multiple first partitions (7) are disposed between the battery pack (501) and the second plate (12), and one first partition (7) corresponds to one battery body (51). In the first direction (Z), the two ends of the first partition (7) are in contact with the battery body (51) and the second plate (12) respectively. The vent (12A), the weak part (71) and the second explosion-proof valve (52) are arranged along the first direction (Z).

10. The battery pack according to claim 9, characterized in that, The first partition (7) has grooves, which form the weak part (71).

11. The battery pack according to claim 9, characterized in that, The first partition (7) includes a first piece (711), a second piece (712), and a connector (713). The first piece (711) has a mounting hole (711A) extending along the first direction (Z). The second piece (712) is disposed in the mounting hole (711A). There are multiple connectors (713). The connectors (713) are located between the outer peripheral surface of the second piece (712) and the hole wall surface of the mounting hole (711A). The connectors (713) connect the second piece (712) and the hole wall surface of the mounting hole (711A). The multiple connectors (713) are arranged circumferentially around the second piece (712). The second piece (712) and the connectors (713) form the weak part (71).

12. The battery pack according to claim 9, characterized in that, The battery pack also includes a second separator (8), in the third direction (Y), two adjacent first separators (7) are connected by the second separator (8), and a plurality of first separators (7) are connected in a row.

13. The battery pack according to claim 12, characterized in that, The battery pack also includes a plurality of first sealing layers (9), which are disposed between the battery pack (501) and the second plate (12); In the second direction (X), a single first sealing layer (9) fills the space between two adjacent rows of first spacers (7); In the first direction (Z), the two ends of the first sealing layer (9) are in contact with the second plate (12) and the battery body (51), respectively.

14. The battery pack according to claim 12, characterized in that, The battery pack also includes a plurality of second sealing layers (10) and a plurality of spacers (20), wherein the plurality of second sealing layers (10) and the plurality of spacers (20) are disposed between the battery pack (501) and the second plate (12); The length direction of the spacer (20) is the same as that of the third direction (Y), and a plurality of the spacers (20) are spaced apart along the second direction (X); The first partition (7) in a single row is located between two adjacent partition strips (20); The second sealing layer (10) is an adhesive layer, and the spacer (20) and the single row of first spacers (7) and the spacer (20) of adjacent spaces are filled with the second sealing layer (10); In the first direction (Z), the two ends of the spacer (20) are connected to the battery body (51) and the second plate (12) respectively, and the two ends of the second sealing layer (10) are connected to the battery body (51) and the second plate (12) respectively.

15. The battery pack according to claim 13 or 14, characterized in that, In the second direction (X), the length dimension of the first partition (7) is greater than the length dimension of the second partition (8).

16. The battery pack according to any one of claims 8-14, characterized in that, The battery pack also includes a plurality of third separators (30), the third separators (30) are strip-shaped, the third separators (30) are disposed in the gas collection cavity (1A), and the third separators (30) are connected to the first plate (11), and the plurality of third separators (30) are arranged at intervals along the second direction (X); Among them, a row of second explosion-proof valves (52) faces one of the third partitions (30).

17. The battery pack according to claim 16, characterized in that, The battery pack also includes an elastic support member (40), which is disposed in the gas collection chamber (1A). In the first direction (Z), one end of the elastic support member (40) is connected to the first plate (11) and the other end is connected to the second plate (12).

18. The battery pack according to claim 17, characterized in that, The elastic support (40) is strip-shaped, and the length direction of the elastic support (40) is the same as the third direction (Y). There are multiple elastic support (40), and at least one elastic support (40) is provided between two adjacent third partitions (30) in the second direction (X).

19. The battery pack according to claim 18, characterized in that, The elastic support (40) includes a plurality of first support segments (401) and a plurality of second support segments (402), the plurality of first support segments (401) are spaced apart along the third direction (Y), and two adjacent first support segments (401) are connected by a second support segment (402); The first support segment (401) is connected to the first plate (11), and the second support segment (402) protrudes toward the second plate (12) relative to the first plate (11) to form an arched structure. The second support segment (402) is connected to the second plate (12).

20. The battery pack according to claim 19, characterized in that, The base plate assembly (1) further includes a boss (13), which is located in the gas collection chamber (1A). The boss (13) is connected to the second plate (12). The boss (13) is strip-shaped and extends along the second direction (X). There are multiple bosses (13). Multiple bosses (13) are arranged at intervals along the third direction (Y). In the third direction (Y), the bosses (13) and the exhaust holes (12A) are alternately arranged. The boss (13) has a first flow channel (13A). Each first flow channel (13A) is interconnected. In the third direction (Y), the second support segment (402) is located between two adjacent bosses (13).

21. The battery pack according to claim 20, characterized in that, The boss (13) includes a plurality of first connecting segments (131) and a plurality of second connecting segments (132). The plurality of first connecting segments (131) are spaced apart along the second direction (X), and two adjacent first connecting segments (131) are connected by a second connecting segment (132). The first flow channel (13A) passes through the first connecting segments (131) and the second connecting segments (132). The second connecting segment (132) protrudes relative to the first connecting segment (131) along the third direction (Y). In the second direction (X), the exhaust hole (12A) is provided between two adjacent second connecting segments (132). In the third direction (Y), the second support segment (402) is located between two adjacent second connecting segments (132).

22. The battery pack according to claim 21, characterized in that, The second connecting segment (132) includes a first segment (1321), a second segment (1322), and a third segment (1323). The first segment (1321) is straight and its length direction is the same as the second direction (X). The length directions of the second segment (1322) and the third segment (1323) are oblique to the third direction (Y). The first segment (1321) is connected to the second segment (1322) and the third segment (1323) at both ends of its length direction, respectively. The first segment (1321) is connected to the first connecting segment (131) through the second segment (1322) and the third segment (1323).

23. The battery pack according to claim 22, characterized in that, The second support segment (402) includes a fourth segment (4021), a fifth segment (4022), and a sixth segment (4023). The fourth segment (4021) is straight and its length direction is the same as the second direction (X). The length directions of the fifth segment (4022) and the sixth segment (4023) are oblique to the third direction (Y). The two ends of the fourth segment (4021) along its length direction are connected to the fifth segment (4022) and the sixth segment (4023) respectively. In the second connecting segment (132) and the second supporting segment (402) adjacent to each other in the third direction (Y), the first segment (1321), the second segment (1322), and the third segment (1323) form a slot, and the fourth segment (4021), the fifth segment (4022), and the sixth segment (4023) are engaged in the slot. The first segment (1321) and the fourth segment (4021) are arranged along the third direction (Y), the second segment (1322) and the fifth segment (4022) are arranged along the third direction (Y), and the third segment (1323) and the sixth segment (4023) are arranged along the third direction (Y).

24. The battery pack according to claim 19, characterized in that, The first support segment (401) has a through hole (401A) extending along the first direction (Z).

25. The battery pack according to any one of claims 8-14, characterized in that, The second plate (12) has a second flow channel (12B).

26. The battery pack according to any one of claims 8-14, characterized in that, The battery pack also includes a first sealing ring (50), a second sealing ring (60), and a third sealing ring (70); The frame (2) has a first mounting surface (201), a second mounting surface (202) and a third mounting surface (203) arranged around the center of the receiving space (10A), the first mounting surface (201) facing the cover (3), and the second mounting surface (202) and the third mounting surface (203) facing away from the cover (3); The first mounting surface (201) is sealed to the cover (3) through the first sealing ring (50), the second mounting surface (202) is sealed to the first plate (11) through the second sealing ring (60), and the third mounting surface (203) is sealed to the second plate (12) through the third sealing ring (70).

27. The battery pack according to claim 26, characterized in that, The frame (2) has an annular first mounting groove (20A), the first mounting groove (20A) is located on the first mounting surface (201), the first mounting groove (20A) is arranged around the center of the receiving space (10A), the groove wall of the first mounting groove (20A) extends outward from the bottom surface of the groove to the groove opening, and the first mounting groove (20A) is provided with the first sealing ring (50).

28. The battery pack according to claim 27, characterized in that, The frame (2) has an annular second mounting groove (20B) located on the first mounting surface (201). The second mounting groove (20B) is arranged around the center of the receiving space (10A). The groove wall of the second mounting groove (20B) extends outward from the bottom surface to the opening. The second mounting groove (20B) is provided with the first sealing ring (50). The first mounting groove (20A) is located on the side of the second mounting groove (20B) near the center of the receiving space (10A).

29. The battery pack according to claim 28, characterized in that, The battery (5) further includes a first fastener (80) that connects the cover (3) and the frame (2) and is located between the first mounting groove (20A) and the second mounting groove (20B). There are multiple first fasteners (80), and the multiple first fasteners (80) are spaced apart around the center of the receiving space (10A).

30. The battery pack according to claim 26, characterized in that, The second sealing ring (60) has a receiving hole (60A) extending through the first direction (Z); The battery pack also includes a spacer (90), which is disposed in the receiving hole (60A). The two ends of the spacer (90) in the first direction (Z) are respectively connected to the first plate (11) and the second mounting surface (202).

31. The battery pack according to claim 30, characterized in that, The number of the receiving holes (60A) is multiple, and the multiple receiving holes (60A) are arranged at intervals around the center of the receiving space (10A); The number of the spacers (90) is multiple, and one spacer (90) is disposed in one of the receiving holes (60A); The spacer (90) includes a spacer part (901) and a fixing part (902). The fixing part (902) is fixedly connected to the frame (2). The spacer part (901) is disposed in the receiving hole (60A). The two ends of the spacer part (901) in the first direction (Z) are respectively connected to the first plate (11) and the second mounting surface (202). The spacer part (901) has a fixing hole (90A) on the side facing the first plate (11). The fixing hole (90A) extends into the fixing part (902). The battery pack also includes a plurality of second fasteners (100), one of which is connected to the wall of one of the fixing holes (90A) to connect the first plate (11) to the frame (2).

32. The battery pack according to claim 26, characterized in that, The frame (2) has an annular third mounting groove (20C), the third mounting groove (20C) is located on the third mounting surface (203), the third mounting groove (20C) is arranged around the center of the receiving space (10A), the groove wall of the third mounting groove (20C) extends outward from the bottom surface of the groove to the groove opening, and the third mounting groove (20C) is provided with the third sealing ring (70).

33. The battery pack according to claim 3, characterized in that, The battery pack also includes a protective cover (200) having an exhaust groove (200A) and an opening (200B). The protective cover (200) is connected to the second end (2112) and covers the second weight-reducing groove (2112A). The opening of the exhaust groove (200A) faces the second weight-reducing groove (2112A). The opening (200B) communicates with the exhaust groove (200A) and faces the side where the base plate assembly (1) is located.

34. The battery pack according to claim 2, characterized in that, The exhaust seat (212) has an exhaust chamber (212A) and an air inlet (212B), the air inlet (212B) connecting the air collecting chamber (1A) and the exhaust chamber (212A); The second end (2112) has an air outlet (2112B), which is located on the bottom surface of the second weight reduction groove (2112A) and is connected to the exhaust chamber (212A). The air inlet (212B), the exhaust chamber (212A), and the air outlet (2112B) form the exhaust channel (21A).

35. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-33.

Images