Battery pack

Abstract

A battery pack includes a housing, a crossbeam, a longitudinal beam, and at least one battery pack. The housing encloses a receiving cavity; the crossbeam is housed within the receiving cavity; the longitudinal beam is housed within the receiving cavity and is located on the side of the crossbeam opposite to the bottom of the housing; the longitudinal beam and the crossbeam intersect each other, dividing the receiving cavity into multiple unit spaces; the battery pack is disposed within each unit space; the gap between the battery pack and the longitudinal beam is less than or equal to 10 mm. This battery pack can solve the problem of requiring a large amount of reserved space for battery installation in a battery pack, and by reducing the reserved space, the space utilization rate within the battery pack can be improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, specifically to a battery pack. Background Technology

[0002] In existing technologies, battery packs consist of a battery box and battery modules installed within the battery box. The CTP (Cell to Pack) architecture is a novel battery pack architecture. The CTP architecture eliminates the traditional battery-module-pack installation method, directly integrating the battery into the battery pack. The CTP architecture incorporates supporting structural beams to support the battery pack and improve box rigidity. Furthermore, the battery is installed and fixed within the cavity formed by the structural beams and the frame.

[0003] However, most existing battery packs use a single crossbeam structure, resulting in low rigidity. While a combined crossbeam and longitudinal beam structure improves rigidity, the required safety distance between the battery pack and the longitudinal beam during installation, along with welds at the intersections of the crossbeams and longitudinal beams, leads to a larger distance between them. The distance between the longitudinal beam and a single battery pack is typically greater than 12mm, significantly occupying internal space and resulting in low space utilization. Utility Model Content

[0004] The purpose of this invention is to provide a battery pack that can solve the problem of needing a large amount of space to install batteries in the battery pack.

[0005] In a first aspect, this application provides a battery pack, including a housing, a crossbeam, a longitudinal beam, and at least one battery pack: the housing encloses a receiving cavity; the crossbeam is received in the receiving cavity; the longitudinal beam is received in the receiving cavity, and the longitudinal beam is disposed on the side of the crossbeam away from the bottom of the housing; the longitudinal beam and the crossbeam intersect each other, dividing the receiving cavity into multiple unit spaces; the battery pack is disposed in the unit space; the gap width between the battery pack and the longitudinal beam is less than or equal to 10 mm.

[0006] In some embodiments, the gap width between the battery pack and the longitudinal beam is less than or equal to 5 mm.

[0007] In some embodiments, the gap width between the battery pack and the longitudinal beam is less than or equal to 3 mm.

[0008] In some embodiments, the crossbeam has a first slot facing the longitudinal beam, and the longitudinal beam has a second slot facing the crossbeam. The crossbeam and the longitudinal beam are engaged by the first slot and the second slot. At the engagement position of the crossbeam and the longitudinal beam, no weld is provided between the side of the longitudinal beam and the side of the crossbeam.

[0009] In some embodiments, the longitudinal beam and the transverse beam are fixed by riveting, and the longitudinal beam and the box body are connected by adhesive or bolts.

[0010] In some embodiments, the thickness of the crossbeam is greater than the thickness of the longitudinal beam.

[0011] In some embodiments, the longitudinal beam has a bulge and / or groove on its side, the bulge and / or groove facing the unit space.

[0012] In some embodiments, the longitudinal beam further includes a mating part that connects the side of the longitudinal beam facing away from the bottom wall of the box to the crossbeam.

[0013] In some embodiments, a third slot is provided on the side of the longitudinal beam away from the bottom of the box body, and the mating part is at least partially engaged in the third slot.

[0014] In some embodiments, the battery pack further includes a mating component, through which the mating portion connects to the side of the crossbeam facing away from the bottom wall of the housing.

[0015] In some embodiments, the mating component includes a bolt, a first hole is provided on the side of the crossbeam facing away from the bottom wall of the box, a through second hole is provided on the mating part, and the bolt passes through the second hole to extend into the first hole.

[0016] In some embodiments, there are multiple crossbeams, and the longitudinal beams include multiple mating parts, with each mating part corresponding to one of the multiple crossbeams.

[0017] In some embodiments, the battery pack further includes adhesives for connecting the longitudinal beam and the battery, and / or adhesives for connecting the longitudinal beam and the cold plate.

[0018] This invention significantly improves the rigidity of the battery pack by adding crossbeams and longitudinal beams. Furthermore, the longitudinal beams are located on the side of the crossbeams away from the bottom of the housing, allowing them to be installed after the crossbeams. This also allows the longitudinal beams to be installed after the battery pack is installed. The thickness of the longitudinal beams can be adjusted according to the gap between the battery packs, thereby minimizing the gap requirement for the longitudinal beams entering the housing. This ensures that the distance between the longitudinal beams and the battery packs on one side is no more than 10mm, thus maximizing the utilization of space within the battery pack. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 An internal view of a battery pack according to one implementation method;

[0021] Figure 2 This is a schematic diagram illustrating the distance between the battery pack and the longitudinal beam in one implementation method;

[0022] Figure 3 This is a schematic diagram showing the distance between the battery pack and the longitudinal beam in existing technology;

[0023] Figure 4 This is an assembly diagram showing the snap-fit ​​connection of a crossbeam and a longitudinal beam in one implementation method;

[0024] Figure 5 This is an external view of a beam in one implementation method;

[0025] Figure 6 This is an external view of the longitudinal beam on the first side of one embodiment;

[0026] Figure 7 This is an external view of the longitudinal beam on the second side in one embodiment;

[0027] Figure 8 This is an external view of the mating part in one embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100 - Battery pack, 110 - Housing, 111 - Receiving cavity, 112 - Unit space, 113 - First side plate, 114 - Second side plate, 120 - Crossbeam, 121 - First slot, 122 - Third part, 123 - Fourth part, 124 - First hole, 120A - First crossbeam, 120B - Second crossbeam, 120C - Third crossbeam, 130 - Longitudinal beam, 131 - Second slot, 132 - Protrusion 133-groove, 134-first side surface, 135-second side surface, 136-first part, 137-second part, 138-connecting part, 139-fitting part, 1391-first section, 1392-second section, 1393-second hole, 139A-first mating part, 139B-second mating part, 140-fitting part, 001-length direction, 002-width direction, 003-height direction. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0032] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0033] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] For some implementation methods, please refer to Figures 1-7 The battery pack 100 includes a housing 110, a crossbeam 120, a longitudinal beam 130, and at least one battery pack; wherein, the housing 110 encloses a receiving cavity 111; the crossbeam 120 is received in the receiving cavity 111, the longitudinal beam 130 is received in the receiving cavity 111, and the longitudinal beam 130 is located on the side of the crossbeam 120 away from the bottom of the housing 110; the longitudinal beam 130 and the crossbeam 120 intersect each other, dividing the receiving cavity 111 into multiple unit spaces 112; the battery pack is located in the unit space 112; the gap width between the battery pack and the longitudinal beam 130 is less than or equal to 10 mm.

[0035] In a specific embodiment, please refer to Figure 1The battery pack 100 can be hexahedral in shape, specifically cuboid. The battery pack 100 includes a length direction 001, a width direction 002, and a height direction 003; wherein the length direction 001 is the longest side of the battery pack 100, the width direction 002 is the second longest side of the battery pack 100, and the long and wide sides together enclose the top or bottom large surface of the battery pack 100; the height direction 003 is the direction perpendicular to the ground when the battery pack 100 is placed on the ground. Optionally, the battery can be a square battery. In a specific embodiment, the battery pack provided by this utility model can be a CTP (Cellto Pack) battery pack.

[0036] In a specific embodiment, please refer to Figure 1 The housing 110 includes a bottom plate and four side plates, which are connected in a ring shape from end to end and connected to the bottom plate. Optionally, the battery pack 100 also includes a cover (not shown in the figure), which is connected to the housing 110. The cover and the bottom plate are positioned opposite each other along the height direction 003. The housing 110 and the cover together enclose the receiving cavity 111.

[0037] In a specific embodiment, please refer to Figure 1 Both the crossbeam 120 and the longitudinal beam 130 are housed within the receiving cavity 111. The crossbeam 120 extends along the width direction 002, and the longitudinal beam 130 extends along the length direction 001, so the crossbeam 120 and the longitudinal beam 130 intersect. The crossbeam 120 and the longitudinal beam 130 together divide the receiving cavity 111 into multiple unit spaces 112, each unit space 112 containing at least one battery. Optionally, the number of unit spaces 112 can be four.

[0038] In a specific embodiment, please refer to Figure 2 , Figure 2 S0 illustrates a distance of less than or equal to 10mm between the battery pack and the longitudinal beam 130 provided by this utility model. Further, the gap width between the battery pack and the longitudinal beam 130 is less than or equal to 5mm. Preferably, the gap width between the battery pack and the longitudinal beam 130 is less than or equal to 3mm. Specifically, the longitudinal beam 130 has a gap with the battery mounted on one side thereon, and the gap distance is less than or equal to 3mm. Therefore, the sum of the gaps between the longitudinal beam 130 and the batteries mounted on both sides thereon can be less than 6mm.

[0039] In a specific embodiment, please refer to Figure 3 , Figure 3S1 represents the clearance between the battery pack and the longitudinal beams in the prior art. In the prior art, S1 = S2 + S3, where S2 is the clearance required for welding the crossbeams and longitudinal beams (point A indicates the welding position), and S3 is the larger clearance resulting from the subsequent installation of the battery pack. The reason for the required clearance S1 between the battery pack and the longitudinal beams in the prior art is that the crossbeams and longitudinal beams are placed in the battery box before the battery modules, and since the crossbeams and longitudinal beams are mostly welded, a clearance S2 is needed for welding. Furthermore, to avoid installation interference between the battery modules and the longitudinal beams in the battery box, and to prevent the welded joints from squeezing the battery pack, an additional clearance S3 is required. Therefore, the total clearance between the battery pack and the longitudinal beams is relatively wide, and this excess clearance significantly occupies internal space in the battery pack, resulting in low space utilization.

[0040] This invention significantly improves the rigidity of the battery pack 100 by adding a crossbeam 120 and a longitudinal beam 130. Furthermore, the longitudinal beam 130 is located on the side of the crossbeam 120 away from the bottom of the housing 110, allowing it to be installed after the crossbeam 120. This also allows the longitudinal beam 130 to be installed after the battery pack is inserted into the housing. The thickness of the longitudinal beam 130 can be adjusted according to the gap between the battery packs, thereby minimizing the required gap between the longitudinal beam 130 and the battery pack on one side, ensuring the distance between the longitudinal beam 130 and the battery pack on one side is no more than 10mm. This fully improves the space utilization rate within the battery pack 100. Therefore, in the battery pack provided by this invention, the gap between the battery pack and the longitudinal beam 130 can be significantly reduced.

[0041] In some embodiments, the crossbeam 120 has a first slot 121 facing the longitudinal beam 130, and the longitudinal beam 130 has a second slot 131 facing the crossbeam 120. The crossbeam 120 and the longitudinal beam 130 are engaged by the first slot 121 and the second slot 131. At the engagement position of the crossbeam 120 and the longitudinal beam 130, no weld is provided between the side of the longitudinal beam 130 and the side of the crossbeam 120.

[0042] In a specific embodiment, please refer to Figure 5 A first slot 121 is provided on the crossbeam 120, and a second slot 131 is provided on the longitudinal beam 130. The crossbeam 120 and the longitudinal beam 130 are engaged through the first slot 121 and the second slot 131. It can be understood that the opening of the first slot 121 and the opening of the second slot 131 are directly opposite each other along the height direction 003, and at least a portion of the crossbeam 120 extends into the second slot 131, and at least a portion of the longitudinal beam 130 extends into the first slot 121.

[0043] In a specific embodiment, please refer to Figure 1 and Figure 4The crossbeam 120 can be connected to the bottom of the housing 110, and then the longitudinal beam 130 is inserted from top to bottom into the receiving cavity 111 and engaged with the crossbeam 120. In other embodiments, the longitudinal beam 130 can also be connected to the bottom of the housing 110, and then the crossbeam 120 is inserted from top to bottom into the receiving cavity 111 and engaged with the longitudinal beam 130.

[0044] In a specific embodiment, please refer to Figure 1 and Figure 4 The first slot 121 is formed on the side of the crossbeam 120 facing away from the bottom wall of the housing 110, and the second slot 131 is formed on the side of the longitudinal beam 130 facing the bottom wall of the housing 110. Specifically, the longitudinal beam 130 is inserted into the receiving cavity 111 from top to bottom and engages with the crossbeam 120. Optionally, after all the batteries are installed in the receiving cavity 111, the longitudinal beam 130 can be inserted last between the batteries and engage with the crossbeam 120.

[0045] This invention sets the opening of the first slot 121 on the side of the crossbeam 120 facing away from the bottom wall of the box 110, so that the longitudinal beam 130 can be inserted into the receiving cavity 111 from top to bottom. This facilitates the installation of the longitudinal beam 130 after the battery is put into the box. The thickness of the longitudinal beam 130 can be set by the battery spacing, which can minimize the gap requirement for entering the box.

[0046] In some embodiments, the longitudinal beam 130 and the transverse beam 120 are fixed by riveting, and the longitudinal beam 130 is connected to the housing 110 by adhesive bonding or bolting, or by welding. In a specific embodiment, the longitudinal beam 130 and the housing 110 can be connected by structural adhesive or bolted to the housing 110. Optionally, the transverse beam 120 and the housing can also be connected by adhesive bonding or bolting, or by welding. The connection methods of the transverse beam 120 or the longitudinal beam 130 to the housing can be the same or different.

[0047] This utility model fixes the longitudinal beam 130 and the cross beam 120 by riveting, which can avoid adding a weld between the cross beam 120 and the longitudinal beam 130, and can further reduce the distance between the longitudinal beam 130 and the battery pack; that is, compared with the prior art, the required reserved spacing S3 is reduced, so that the total distance between the longitudinal beam 130 and the battery pack is reduced.

[0048] In some embodiments, the thickness of the crossbeam 120 is greater than the thickness of the longitudinal beam 130. For details, please refer to [reference needed]. Figure 1 The thickness of the longitudinal beam 130 refers to the thickness between the two large faces of the longitudinal beam 130 in the width direction 002; the thickness of the transverse beam 120 refers to the thickness between the two large faces of the transverse beam 120 in the length direction 001. The longitudinal beam 130 can be obtained by bending and stamping sheet metal, so the thickness of the longitudinal beam 130 is actually the thickness of the sheet metal used to manufacture it.

[0049] This invention reduces the space occupied by the longitudinal beam 130 within the battery pack 100 by setting the thickness of the longitudinal beam 130 to be less than the thickness of the cross beam 120, thereby reducing the spacing between battery packs in adjacent unit spaces 112. This not only improves the space utilization within the battery pack 100, but also makes it easier to form the desired longitudinal beam 130 shape through stamping.

[0050] For some implementation methods, please refer to Figure 4 and Figure 5 The longitudinal beam 130 has protrusions 132 and / or grooves 133 on its sides, with the protrusions 132 and / or grooves 133 facing the unit space 112. Specifically, the longitudinal beam 130 includes opposite sides, with the sides of the longitudinal beam 130 facing the side plates of the housing 110. The sides of the longitudinal beam 130 have protrusions 132 and / or grooves 133. It should be noted that the protrusions 132 and grooves 133 may be located on the same side of the longitudinal beam 130; or, the protrusions 132 may be located on one side of the longitudinal beam 130, and the grooves 133 may be located on the other side of the longitudinal beam 130.

[0051] In a specific embodiment, the material of the longitudinal beam 130 may be different from that of the box body 110, and / or the material of the longitudinal beam 130 may be different from that of the cross beam 120.

[0052] In a specific embodiment, please refer to Figure 1 , Figure 4 and Figure 5 The housing 110 includes a first side plate 113 and a second side plate 114 disposed opposite to each other. A longitudinal beam 130 is located between the first side plate 113 and the second side plate 114. The longitudinal beam 130 includes a first side 134 and a second side 135 facing away from each other. The first side 134 faces the first side plate 113 and has a protrusion 132. The second side 135 has a groove 133.

[0053] In a specific embodiment, please refer to Figure 1 The first side plate 113 and the second side plate 114 are arranged opposite each other along the width direction 002, and the longitudinal beam 130 is located between the first side plate 113 and the second side plate 114 and is arranged parallel to them. The protrusion 132 and the groove 133 are directly opposite each other along the width direction 002. It can be understood that the longitudinal beam 130 is formed by stamping, so one side of its stamping forms the groove 133, and the other side forms the protrusion 132.

[0054] In a specific embodiment, please refer to Figure 4 and Figure 5 The number of convex hulls 132 is multiple, and the multiple convex hulls 132 are arranged in an array on the first side surface 134. The number of grooves 133 is multiple, and the multiple grooves 133 are arranged in an array on the first side surface 134.

[0055] This utility model also increases the surface area of ​​the longitudinal beam 130 by providing a protrusion 132 and / or a groove 133 on the side of the longitudinal beam 130, which can enhance the bonding effect of the adhesive between the battery and the longitudinal beam 130 after the battery pack is filled with adhesive.

[0056] For some implementation methods, please refer to Figure 4 and Figure 5 The longitudinal beam 130 includes a first part 136, a second part 137, and a connecting part 138. The gap between the first part 136 and the second part 137 forms a second slot 131. The two opposite ends of the connecting part 138 connect to the first part 136 and the second part 137, and the connecting part 138 extends into the first slot 121. Specifically, the first part 136, the connecting part 138, and the second part 137 are connected sequentially along the length direction 001. Along the height direction 003, the first part 136 and the second part 137 have the same width, while the width of the connecting part 138 is smaller than that of the first part 136 and the second part 137.

[0057] In a specific embodiment, please refer to Figure 4 and Figure 5 The second slot 131 is formed by the first part 136, the second part 137, and the connecting part 138. Because the width of the connecting part 138 is smaller than that of the first part 136 and the second part 137, the second slot 131 is formed at the connecting part 138. After the crossbeam 120 and the longitudinal beam 130 are engaged, the connecting part 138 extends into the first slot 121. Optionally, the first part 136, the second part 137, and the connecting part 138 are an integral structure.

[0058] In a specific embodiment, please refer to Figure 5 The first slot 121 divides the crossbeam 120 into a third part 122 and a fourth part 123. The first part 136, the second part 137, the third part 122, and the fourth part 123 are used to separate different unit spaces 112. Optionally, the first part 136 and the third part 122 can be used to separate the first unit space 112, the first part 136 and the fourth part 123 can be used to separate the second unit space 112, the second part 137 and the third part 122 can be used to separate the third unit space 112, and the second part 137 and the fourth part 123 can be used to separate the fourth unit space 112.

[0059] For some implementation methods, please refer to Figure 6 and Figure 7The longitudinal beam 130 also includes a mating part 139, which is connected to the side of the connecting part 138 facing away from the bottom wall of the housing 110. The mating part 139 connects to the crossbeam 120. Specifically, after the crossbeam 120 and the longitudinal beam 130 are engaged, the mating part 139 is used to connect the crossbeam 120 to strengthen the connection between the longitudinal beam 130 and the crossbeam 120. Optionally, the connection between the mating part 139 and the crossbeam 120 can be made by means including but not limited to screwing, bonding, welding, riveting, and snap-fitting.

[0060] In a specific embodiment, a third slot is provided on the side of the longitudinal beam 130 opposite to the bottom of the housing 110. The third slot is located on the side of the longitudinal beam 130 opposite to the bottom wall of the housing 110, and the mating part 139 is at least partially engaged in the third slot. The orthographic projections of the third slot and the second slot 131 in the height direction coincide. It can be understood that the connecting part 138 is connected at the middle position of the first part 136 and the second part 137, thereby forming the second slot 131 and the third slot on the opposite sides of the connecting part 138, respectively.

[0061] In a specific embodiment, the depth of the third slot is less than the depth of the second slot 131, and the mating part 139 is connected to the bottom wall of the third slot. The mating part 139 can be connected to the inner wall of the first slot 121 or to the outside of the first slot 121. The mating part 139 and the connecting part 138 can be an integral structure; or the mating part 139 and the connecting part 138 can be detachably connected.

[0062] For some implementation methods, please refer to Figure 1 and Figure 5 The battery pack 100 also includes a mating part 140, through which the mating portion 139 is connected to the side of the crossbeam 120 facing away from the bottom wall of the housing 110. Specifically, the mating portion 139 includes a first section 1391 and a second section 1392 connected at an angle. The first section 1391 is connected to the bottom wall of the third slot, and the second section 1392 is connected to the side of the fixed crossbeam 120 facing away from the bottom wall of the housing 110 through the mating part 140.

[0063] In a specific embodiment, the first segment 1391 and the second segment 1392 can be connected at a right angle. The first segment 1391 extends along the height direction 003, and the second segment 1392 extends along the width direction 002. It can be understood that the first segment 1391 and the second segment 1392 together form a bent structure, which allows the mating part 139 to contact the side of the crossbeam 120 facing away from the bottom wall of the box 110.

[0064] In specific embodiments, the mating component 140 includes, but is not limited to, bolts, rivets, structural adhesives, etc. It is understood that the mating component 140 is used to fix the mating part 139 and the crossbeam 120, thereby strengthening the connection strength between the crossbeam 120 and the longitudinal beam 130.

[0065] In a specific embodiment, the battery pack 100 may not include the mating part 140, and the mating part 139 and the crossbeam 120 may be directly snapped together; or connected by a pressure plate.

[0066] For some implementation methods, please refer to Figure 4 The mating part 140 includes a first mating part 139A and a second mating part 139B. Both the first mating part 139A and the second mating part 139B are connected to the connecting part 138. The first mating part 139A and the second mating part 139B are arranged opposite to each other along the width direction 002. The first mating part 139A and the second mating part 139B are respectively used to connect the two opposite sides of the first slot 121.

[0067] In a specific embodiment, the first mating part 139A and the second mating part 139B have the same shape, both being bent structures, but with opposite bending directions. The first mating part 139A can be used to connect the side of the third part 122 facing away from the bottom wall of the housing 110, and the second mating part 139B can be used to connect the side of the third part 122 facing away from the bottom wall of the housing 110.

[0068] In a specific embodiment, the first mating part 139A and the connecting part 138 can be an integral structure, that is, the first mating part 139A and the connecting part 138 are formed by bending the same piece of sheet metal. The second mating part 139B can be detachably connected to the connecting part 138, and the second mating part 139B can be welded to the surface of the connecting part 138.

[0069] For some implementation methods, please refer to Figure 1 , Figure 5 and Figure 8 The mating component 140 includes bolts. A first hole 124 is formed on the side of the crossbeam 120 facing away from the bottom wall of the housing 110. A through second hole 1393 is formed in the mating part 1399, through which the bolt passes to extend into the first hole 124. Specifically, the crossbeam 120 and the mating part 139 can be connected and fixed by bolts. Both the first mating part 139A and the second mating part 139B can have a mating second hole 1393.

[0070] For some implementation methods, please refer to Figure 1There are multiple crossbeams 120, and the longitudinal beams 130 include multiple mating parts 139. The mating parts 139 are disposed on the side of the longitudinal beam 130 facing away from the bottom wall of the housing 110, and the mating parts 139 are connected to the crossbeams 120 one by one. Specifically, the battery pack 100 includes at least three crossbeams 120, namely a first crossbeam 120A, a second crossbeam 120B, and a third crossbeam 120C. The first crossbeam 120A, the second crossbeam 120B, and the third crossbeam 120C are arranged sequentially at intervals along the length direction 001. The first crossbeam 120A is connected to one end of the longitudinal beam 130, the third crossbeam 120C is connected to the other end of the longitudinal beam 130, and the second crossbeam 120B is connected to the middle of the longitudinal beam 130.

[0071] In a specific embodiment, please refer to Figure 1 The first crossbeam 120A, the second crossbeam 120B, and the third crossbeam 120C have the same structure, and all three can be provided with a first slot 121. The second slot 131 of the longitudinal beam 130 is located in the middle of the longitudinal beam 130. Two notches can be provided at opposite ends of the longitudinal beam 130, and the two notches respectively engage with the first slots 121 on the first crossbeam 120A and the third crossbeam 120C. The longitudinal beam 130 is provided with three mating parts 139, which are used to connect the first crossbeam 120A, the second crossbeam 120B, and the third crossbeam 120C.

[0072] In some embodiments, the battery pack 100 further includes adhesives for connecting the longitudinal beam 130 and the battery, and / or for connecting the longitudinal beam 130 and the cold plate. Specifically, the adhesive can be structural adhesive. The adhesive can be injected between the crossbeam 120 and the battery, and since the crossbeam 120 has protrusions 132 and grooves 133, the adhesive can be injected into the protrusions 132 and grooves 133 to enhance the bonding effect. Of course, in other embodiments, the longitudinal beam 130 and the cold plate can also be connected by bolts.

[0073] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship of the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0074] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A battery pack (100), characterized by, include: Box (110), enclosing the receiving cavity (111); A crossbeam (120) is housed in the receiving cavity (111); A longitudinal beam (130) is housed in the receiving cavity (111), and the longitudinal beam (130) is located on the side of the cross beam (120) away from the bottom of the box (110); the longitudinal beam (130) and the cross beam (120) intersect each other, dividing the receiving cavity (111) into multiple unit spaces (112); At least one battery pack is disposed within the unit space (112); the gap width between the battery pack and the longitudinal beam (130) is less than or equal to 10 mm.

2. The battery pack (100) according to claim 1, characterized in that, The gap width between the battery pack and the longitudinal beam (130) is less than or equal to 5 mm.

3. The battery pack (100) according to claim 1, characterized in that, The gap width between the battery pack and the longitudinal beam (130) is less than or equal to 3 mm.

4. The battery pack (100) of claim 1, wherein, The crossbeam (120) has a first slot (121) facing the longitudinal beam (130), and the longitudinal beam (130) has a second slot (131) facing the crossbeam (120). The crossbeam (120) and the longitudinal beam (130) are engaged by the first slot (121) and the second slot (131). At the engagement position of the crossbeam (120) and the longitudinal beam (130), no weld is provided between the side of the longitudinal beam (130) and the side of the crossbeam (120).

5. The battery pack (100) of claim 1, wherein, The longitudinal beam (130) and the transverse beam (120) are fixed by rivet fastening, and the longitudinal beam (130) and the box body (110) are connected by adhesive or bolts.

6. The battery pack (100) of claim 1, wherein, The thickness of the crossbeam (120) is greater than the thickness of the longitudinal beam (130).

7. The battery pack (100) of claim 1, wherein, The longitudinal beam (130) has a convex bulge (132) and / or a groove (133) on its side, and the convex bulge (132) and / or groove (133) face the unit space (112).

8. The battery pack (100) according to any one of claims 1-7, characterized in that, The longitudinal beam (130) also includes a mating part (139), which connects the side of the longitudinal beam (130) facing away from the bottom wall of the box body (110) to the crossbeam (120).

9. The battery pack (100) according to claim 8, characterized in that, The longitudinal beam (130) has a third slot on the side opposite to the bottom of the box body (110), and the mating part (139) is at least partially engaged in the third slot.

10. The battery pack (100) according to claim 8, characterized in that, The battery pack (100) also includes a mating part (140), the mating part (139) being connected via the mating part (140) to the side of the crossbeam (120) facing away from the bottom wall of the housing (110).

11. The battery pack (100) according to claim 10, characterized in that The mating part (140) includes a bolt. The crossbeam (120) has a first hole (124) on the side facing away from the bottom wall of the box (110). The mating part (139) has a through second hole (1393). The bolt passes through the second hole (1393) and extends into the first hole (124).

12. The battery pack (100) of claim 8, wherein, There are multiple crossbeams (120), and the longitudinal beams (130) include multiple mating parts (139), which are connected one-to-one with the multiple crossbeams (120).

13. The battery pack (100) according to any one of claims 1-7, characterized in that, The battery pack (100) also includes an adhesive for connecting the longitudinal beam (130) and the battery, and / or, the adhesive for connecting the longitudinal beam (130) and the cold plate.

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