A battery pack shell, a battery pack, and an electric device

Abstract

This application provides a battery pack housing, a battery pack, and an electrical device. The battery pack housing includes a protective plate and a frame tray. The protective plate has an open receiving cavity. At least a portion of the frame tray is disposed within the receiving cavity. The frame tray includes a frame and multiple support members. The frame extends circumferentially along the protective plate and is sealed to the edge of the opening. The multiple support members are spaced apart circumferentially along the protective plate and connected to the frame. One end of each support member opposite to the frame is adapted to connect to at least a portion of the battery to support the battery. In this application embodiment, by separating the sealing function and the load-bearing function, with the protective plate undertaking the sealing function and the frame tray undertaking the load-bearing function, the structure of the battery pack housing can be simplified, and the weight can be reduced, thereby reducing the space occupied by the battery pack. This allows for more installation space for the battery, which is beneficial for improving the weight energy density of the battery pack.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicles, and particularly relates to a battery pack shell, a battery pack and an electric device. BACKGROUND

[0002] The battery pack is the power source of the vehicle, and as the cruising range of the vehicle is continuously increased, the weight energy density requirement of the battery pack is also continuously increased.

[0003] In the related art, the battery pack generally comprises a battery and a battery pack shell for mounting the battery. The tray of the battery pack shell needs to simultaneously bear the bearing function and the sealing function of the battery, which will result in that the structure of the battery pack shell is complex, the weight of the battery pack shell is large, and the space occupation of the battery pack is large, thereby affecting the weight energy density of the battery pack. SUMMARY

[0004] The application aims to provide a battery pack shell, a battery pack and an electric device to solve the problem that the structure of the battery pack shell is complex, the weight of the battery pack shell is large, the space occupation of the battery pack is large, thereby affecting the weight energy density of the battery pack.

[0005] In order to solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the application discloses a battery pack shell, comprising: a guard plate and a framework tray.

[0007] The guard plate is provided with a containing cavity with an opening;

[0008] At least part of the framework tray is arranged in the containing cavity, the framework tray comprises a frame body and a plurality of support pieces, the frame body is arranged along the circumference of the guard plate and is sealingly connected with the edge of the opening, and the plurality of support pieces are arranged at intervals along the circumference of the guard plate and are connected with the frame body, one end of the support piece away from the frame body is adapted to be connected with at least part of the battery to support the battery.

[0009] Optionally, the support piece comprises a first support part and a second support part connected with each other, the first support part has a first support surface away from the guard plate, the second support part has a second support surface away from the guard plate, and the second support surface is arranged at an angle with the first support surface.

[0010] The first support part is connected with the frame body, and the second support part is adapted to be connected with at least part of the battery.

[0011] Optionally, the guard plate comprises a bottom plate.

[0012] The second support surface is parallel to the bottom plate, and the included angle a between the second support surface and the first support surface satisfies 90°≤a≤100°.

[0013] Optionally, the frame body comprises a first connecting portion and a second connecting portion arranged in a first direction;

[0014] A plurality of the support members are symmetrically arranged between the first connecting portion and the second connecting portion.

[0015] Optionally, the support member connected to the first connecting portion is a first support member, and the support member connected to the second connecting portion is a second support member;

[0016] The skeleton tray further comprises a supporting assembly arranged between and connected to the first support member and the second support member, and adapted to be connected to at least part of the battery.

[0017] Optionally, the skeleton tray further comprises a plurality of first hollow portions, each of which is enclosed by two adjacent first support members, the first connecting portion and the supporting assembly, and adapted to expose at least part of the battery;

[0018] And / or, the skeleton tray further comprises a plurality of second hollow portions, each of which is enclosed by two adjacent second support members, the first connecting portion and the supporting assembly, and adapted to expose at least part of the battery.

[0019] Optionally, the sum of the projection areas of the plurality of first hollow portions in the first direction is S1;

[0020] The sum of the projection areas of the plurality of first support members in the first direction is S2, and satisfies: 0.6≤S1 / (S1+S2)≤0.8;

[0021] And / or, the sum of the projection areas of the plurality of second hollow portions in the first direction is S3;

[0022] The sum of the projection areas of the plurality of second support members in the first direction is S4, and satisfies: 0.6≤S3 / (S3+S4)≤0.8;

[0023] And / or, the first hollow portion and / or the second hollow portion is adapted to expose at least part of the sampling module and / or the battery module.

[0024] Optionally, the supporting assembly comprises a first supporting plate and a second supporting plate;

[0025] The first supporting plate and the second supporting plate are spaced apart along the first direction, the first supporting plate is connected with the first support, the second supporting plate is connected with the second support, and the first supporting plate and the second supporting plate are adapted to be connected with at least part of the battery.

[0026] Optionally, the supporting assembly further comprises a third supporting plate, the third supporting plate is arranged between the first supporting plate and the second supporting plate and connected with the first supporting plate and the second supporting plate respectively, and the third supporting plate is adapted to be connected with at least part of the battery.

[0027] Optionally, the framework tray further comprises a plurality of expansion beams, the expansion beams are arranged on a side of the supporting assembly away from the backboard, and the plurality of expansion beams are spaced apart along a second direction intersecting the first direction.

[0028] One of the expansion beams is connected with a first support and a second support at two ends along the first direction respectively.

[0029] Optionally, the frame further comprises a third connecting portion and a fourth connecting portion, the third connecting portion and the fourth connecting portion are spaced apart along the second direction and located between the first connecting portion and the second connecting portion.

[0030] The framework tray is further provided with a third hollow portion, the third hollow portion is enclosed by the third connecting portion, the first connecting portion, the second connecting portion and the expansion beam close to the third connecting portion, and the third hollow portion is adapted to expose at least part of the distribution box.

[0031] Optionally, the frame and the support are an integral structure.

[0032] And / or, the support is further provided with a reinforcing rib, the reinforcing rib is formed by at least part of the support protruding towards a side close to the backboard.

[0033] And / or, the battery pack shell further comprises a first sealing member, the first sealing member is arranged between the backboard and the frame.

[0034] And / or, the battery pack shell further comprises a cover plate, the cover plate is arranged at the opening, and the cover plate is sealingly connected with the frame.

[0035] And / or, the battery pack shell further comprises a heat preservation member, the heat preservation member is arranged on a side of the backboard close to the framework tray.

[0036] And / or, the frame includes: an overlapping portion and two first flanges, the two first flanges being spaced apart along a first direction, and each first flange being connected to the side of the overlapping portion opposite to the center of the receiving cavity;

[0037] The overlapping portion is sealed to the protective plate, and the first flange is adapted to be connected to the vehicle body.

[0038] Optionally, the frame and the support are integrally die-cast structures;

[0039] And / or, the battery pack housing further includes: a second seal, the second seal being disposed between the cover plate and the frame;

[0040] And / or, the first flange is provided with a plurality of connecting holes, the plurality of connecting holes being spaced apart along a second direction, the second direction intersecting the first direction;

[0041] The first flange has a plurality of fourth hollowed-out portions on the side away from the overlapping portion, and at least one of the fourth hollowed-out portions is located between two adjacent connecting holes.

[0042] Secondly, this application also discloses a battery pack, including: a battery and the aforementioned battery pack housing;

[0043] The battery is disposed within the receiving cavity, and at least a portion of the battery is connected to the end of the support member opposite to the frame.

[0044] Thirdly, this application also discloses an electrical device, including the aforementioned battery pack.

[0045] In this embodiment, a protective plate and a frame tray are provided. The protective plate has a receiving cavity, and the frame tray is disposed within the receiving cavity. The frame of the frame tray is sealed to the edge of the opening of the receiving cavity, and the support member of the frame tray is adapted to be at least partially connected to the battery. Thus, on the one hand, by placing the battery within the receiving cavity, not only can the battery be isolated from the external environment, thereby achieving a sealing function, but the bottom plate structure of the frame tray can also be reduced, thereby simplifying the structure of the frame tray and the battery pack housing and achieving a lightweight battery pack housing. On the other hand, by connecting the battery to the support member, the support member can support the battery, thereby achieving a load-bearing function. In summary, by separating the sealing and load-bearing functions, with the protective plate undertaking the sealing function and the frame tray undertaking the load-bearing function, the structure of the battery pack housing can be simplified, the weight reduced, and the space occupied by the battery pack decreased. This allows for more installation space for the battery, which is beneficial for improving the weight energy density of the battery pack.

[0046] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0047] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0048] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0049] Figure 2 This is an exploded schematic diagram of a battery pack provided in an embodiment of this application;

[0050] Figure 3 This is a cross-sectional view of a battery pack housing provided in an embodiment of this application;

[0051] Figure 4 yes Figure 3 A magnified view of a portion of position A in the middle;

[0052] Figure 5 This is a schematic diagram of the structure of the protective plate provided in the embodiment of this application;

[0053] Figure 6 This is one of the structural schematic diagrams of the skeleton tray provided in the embodiments of this application;

[0054] Figure 7 This is the second structural schematic diagram of the skeleton tray provided in the embodiments of this application;

[0055] Figure 8 yes Figure 7 A magnified view of a portion of position B in the middle;

[0056] Figure 9 This is the third schematic diagram of the skeleton tray provided in the embodiments of this application;

[0057] Figure 10 This is the fourth structural schematic diagram of the skeleton tray provided in the embodiments of this application;

[0058] Figure 11 This is the fifth structural schematic diagram of the skeleton tray provided in the embodiments of this application;

[0059] Figure 12 This is a schematic diagram of the assembly of the cover plate and the battery provided in the embodiments of this application.

[0060] Figure label:

[0061] 100. Battery pack,

[0062] 1. Battery, 11. Battery module, 12. Sampling module, 13. Distribution box, 131. Power distribution interface

[0063] 2. Protective plate; 21. Receiving cavity; 22. Base plate; 23. Side plate; 231. First overlapping edge; 2311. Second mounting hole; 232. Notch.

[0064] 3. Skeleton tray, 31. Frame, 311. First connecting part, 312. Second connecting part, 313. Third connecting part, 314. Fourth connecting part, 315. Overlapping part, 3151. First mounting hole, 316. First flange, 3161. Connecting hole, 3162. Fourth hollow part, 317. Second flange, 32. Support member, 321. First support part, 3211. First support surface, 322. Second support part, 3221. Second support surface, 323. Reinforcing rib, 324. First support member, 325. Second support member, 33. Support assembly, 331. First support plate, 332. Second support plate, 333. Third support plate, 3331. Cooling interface, 34. Expansion beam, 35. First hollow part, 36. Second hollow part, 37. Third hollow part,

[0065] 4. Cover plate; 41. Second overlapping edge; 411. First fastener; 412. Second fastener; 42. End cap.

[0066] 5. First seal,

[0067] 6. Second seal,

[0068] 7. Thermal insulation components,

[0069] 8. Lifting beams,

[0070] X. First direction, Y. Second direction, Z. Third direction. Detailed Implementation

[0071] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0072] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0073] In the description of this invention, 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0075] In related technologies, a battery pack includes batteries and a battery pack housing for mounting the batteries. The battery pack housing includes a sealing cover, a tray, and a protective plate. The bottom of the battery is bonded to the tray using thermally conductive structural adhesive, and the top of the battery is bonded to the sealing cover using structural adhesive, thus forming a sandwich structure. The protective plate is typically flat and installed at the bottom of the tray, serving only to protect the tray. The tray is an extruded and welded aluminum tray, which needs to simultaneously bear load-bearing and sealing functions. Therefore, the perimeter of the tray must ensure continuous material without any gaps. This results in a complex battery pack housing structure, greater weight, and a larger space occupation within the battery pack, leaving less space for battery installation, thereby affecting the weight energy density of the battery pack.

[0076] This application provides a battery pack housing, which will be described in detail below with reference to the accompanying drawings.

[0077] Reference Figures 1-2 This document illustrates a structural schematic diagram and an exploded schematic diagram of a battery pack according to an embodiment of this application. (Refer to...) Figure 3The diagram shows a cross-sectional view of a battery pack housing according to an embodiment of this application, with reference to... Figure 4 , showed Figure 3 A magnified view of the area at position A in the middle, refer to... Figure 5 The diagram shows a structural schematic of the protective plate provided in an embodiment of this application. (Refer to...) Figures 6-7 ,as well as Figures 9-11 This shows a schematic diagram of the skeleton tray provided in an embodiment of this application. (Refer to...) Figure 8 , showed Figure 7 A magnified view of the area at position B in the middle, refer to... Figure 12 The diagram shows an assembly schematic of the cover plate and battery provided in an embodiment of this application.

[0078] like Figures 1-4 As shown, this application provides a battery pack housing, including: a protective plate 2 and a frame tray 3; the protective plate 2 is provided with a receiving cavity 21 having an opening; at least a portion of the frame tray 3 is disposed in the receiving cavity 21, the frame tray 3 includes a frame 31 and a plurality of support members 32, the frame 31 extends circumferentially along the protective plate 2 and is sealed to the edge of the opening, the plurality of support members 32 are spaced apart circumferentially along the protective plate 2 and are connected to the frame 31, one end of the support member 32 opposite to the frame 31 is adapted to be connected to at least a portion of the battery 1 to support the battery 1.

[0079] In this embodiment, a protective plate 2 and a frame tray 3 are provided. The protective plate 2 has a receiving cavity 21, and the frame tray 3 is disposed within the receiving cavity 21. The frame 31 of the frame tray 3 is sealed to the edge of the opening of the receiving cavity 21, and the support member 32 of the frame tray 3 is adapted to be at least partially connected to the battery 1. Thus, on the one hand, by placing the battery within the receiving cavity 21, not only can the battery 1 be isolated from the external environment, thereby achieving a sealing function, but the bottom plate structure of the frame tray 3 can also be reduced, thereby simplifying the structure of the frame tray 3 and the battery pack housing, achieving a lightweight battery pack housing. On the other hand, by connecting the battery 1 to the support member 32, the support member 32 can support the battery 1, thereby achieving a load-bearing function. In summary, by separating the sealing function and the load-bearing function, with the protective plate 2 undertaking the sealing function and the frame tray 3 undertaking the load-bearing function, the structure of the battery pack housing can be simplified, the weight reduced, and the space occupied by the battery pack 100 reduced. This allows for more installation space for the battery 1, which is beneficial for improving the weight energy density of the battery pack 100.

[0080] It should be noted that in the accompanying drawings of this application, the first direction X refers to the width direction of the battery pack casing, that is, the width direction of the battery pack 100; the second direction Y refers to the length direction of the battery pack casing, that is, the length direction of the battery pack 100; and the third direction Z refers to the height direction of the battery pack casing, that is, the height direction of the battery pack 100. Furthermore, the first direction X, the second direction Y, and the third direction Z intersect each other. In one embodiment, the first direction X, the second direction Y, and the third direction Z can be perpendicular to each other.

[0081] It is understood that the connection method in "the support member 32 is adapted to be connected to at least a portion of the battery 1" can be a direct connection or an indirect connection. Furthermore, the embodiments of this application do not limit the number of support members 32; those skilled in the art can adjust the number based on the structure of the support members 32 and the weight of the battery 1. In one embodiment, eight support members 32 are provided, symmetrically arranged on both sides of the frame 31 along the first direction X, thereby achieving reliable support for the battery 1.

[0082] In specific applications, such as Figure 6 As shown, the frame 31 includes an overlapping portion 315 extending circumferentially therefrom. The width of the overlapping portion 315 ranges from 15mm to 30mm. This not only improves the structural strength of the frame 31 and the skeleton tray 3, thereby enhancing the overall load-bearing reliability of the skeleton tray 3, but also ensures sufficient overlap area between the frame 31 and the protective plate 2, and between the frame 31 and the cover plate 4, to meet the sealing requirements of the battery pack casing. Figure 5 As shown, the protective plate 2 includes a base plate 22 and a side plate 23. The side plate 23 extends circumferentially along the base plate 22 and surrounds the base plate 22 to form a receiving cavity 21. The side of the side plate 23 away from the base plate 22 extends in a direction away from the receiving cavity 21 to form a first overlapping edge 231. The protective plate 2 and the frame 31 are sealed together by the first overlapping edge 231 and the overlapping part 315. Generally, as the overlap width (i.e., the effective overlap width) between the first overlapping edge 231 and the overlapping part 315 increases, the overlap area between the first overlapping edge 231 and the overlapping part 315 increases accordingly, and the sealing performance increases accordingly. Based on this, when the overlap width between the first overlapping edge 231 and the overlapping part 315 is greater than or equal to 10mm, the sealing requirements of the existing battery pack 100 can be met. In addition, the guard plate 2 can be made of steel and integrally formed by stamping process, with a strength range of 800MPa~2000 MPa and a thickness range of ≥1.5mm, so that the guard plate 2 has good integrity and high structural strength.

[0083] In some optional embodiments of this application, the battery pack housing further includes a cover plate 4, which covers the opening and is sealed to the frame 31. Thus, because the cover plate 4 and the frame 31 are sealed to each other, the cover plate 4 and the protective plate 2, through their combined action, can reliably seal the battery pack housing and the battery pack 100.

[0084] It should be noted that the cover plate 4 can be made of steel and integrally formed by stamping process, with a strength range of 550MPa~1800MPa and a thickness range of 0.8mm~2mm, so that the cover plate 4 has good integrity and high structural strength. In addition, a lifting beam 8 is provided on the side of the cover plate 4 away from the frame 31, that is, on the upper side of the cover plate 4. In this way, the lifting beam 8 can be connected to the vehicle body by bolts, so that the battery pack shell can be reliably fixed to the vehicle body. The cover plate 4 and the lifting beam 8 can be connected by welding. During the assembly process of the cover plate 4 and the battery 1, the cover plate 4 can be placed upside down on the work platform and glued. Then, at least part of the battery 1 (such as the battery module 11 below) can be placed on the cover plate 4. Under the gravity of the battery 1, the cover plate 4 and the battery 1 can be reliably bonded.

[0085] In practical applications, the cover plate 4 has a second overlapping edge 41 extending circumferentially along its edge. The cover plate 4 and the frame 31 are sealed together through the second overlapping edge 41 and the overlapping portion 315 of the frame 31. Generally, as the overlap width (i.e., the effective overlap width) between the second overlapping edge 41 and the overlapping portion 315 increases, the overlap area between them also increases, thus improving the sealing performance. Therefore, when the overlap width between the second overlapping edge 41 and the overlapping portion 315 is greater than or equal to 15mm, the sealing requirements of the existing battery pack 100 can be met.

[0086] Furthermore, such as Figures 3-4As shown, to achieve a reliable connection between the cover plate 4, the frame 31, and the protective plate 2, the overlapping portion 315 of the frame 31 is provided with a plurality of first mounting holes 3151, and the plurality of first mounting holes 3151 are spaced apart circumferentially along the frame 31. The first overlapping edge 231 of the protective plate 2 is provided with a plurality of second mounting holes 2311, and one second mounting hole 2311 is positioned opposite to one first mounting hole 3151. The cover plate 4 is provided with a plurality of first fasteners 411 and second fasteners 412. The plurality of first fasteners 411 are spaced apart circumferentially along the second overlapping edge 41 on the side of the second overlapping edge 41 away from the frame 31. One first fastener 411 is positioned opposite to one first mounting hole 3151 and one second mounting hole 2311 and is engaged with one second fastener 412. In this way, by sequentially inserting the second fastener 412 along the third direction Z into the corresponding second mounting hole 2311 and the first mounting hole 3151, and connecting it with the first fastener 412, the cover plate 4, the frame 31, and the protective plate 2 can be reliably connected together, achieving a complete seal. The first fastener 411 can be a rivet nut, with its opening facing the frame 31, i.e., the lower side as shown in the figure. Correspondingly, the second fastener 412 can be a bolt, which is threadedly connected to the rivet nut.

[0087] In some alternative embodiments of this application, such as Figures 7-8 As shown, the support member 32 includes a first support portion 321 and a second support portion 322 connected to each other. The first support portion 321 has a first support surface 3211 facing away from the protective plate 2, and the second support portion 322 has a second support surface 3221 facing away from the protective plate 2. The second support surface 3221 is set at an angle to the first support surface 3211. The first support portion 321 is connected to the frame 31, and the second support portion 322 is adapted to be connected to at least a portion of the battery 1. It can be understood that "the second support portion 322 is adapted to be connected to at least a portion of the battery 1" can be a direct connection or an indirect connection.

[0088] In this embodiment, a first support portion 321 and a second support portion 322 are provided, and the first support surface 3211 of the first support portion 321 and the second support surface 3221 of the second support portion 322 are arranged at an angle, i.e., the support member 32 is generally L-shaped. Thus, when the battery 1 is installed in the battery pack casing, the second support portion 322 located at the bottom of the battery 1 can support the battery 1, and the first support portion 321 located around the battery 1 can improve the structural stability and lateral impact resistance of the frame tray 3, thus protecting the battery 1. Furthermore, through the connection between the first support portion 321 and the frame 31, and the connection between the second support portion 322 and the battery 1, the force exerted by the battery 1 on the second support portion 322 can be transmitted to the first support portion 321 and the frame 31, thereby improving the load-bearing capacity of the frame tray 3.

[0089] In one embodiment, both the first support portion 321 and the second support portion 322 are plate-like structures, thereby reducing the space occupied by the battery pack 100. Furthermore, the connection between the first support portion 321 and the second support portion 322 is rounded, i.e., the bends of the support member 32 are rounded. This not only avoids stress concentration and improves the structural strength of the support member 32, but also allows the force acting on the second support portion 322 to be better transmitted to the first support portion 321 and the frame 31, thereby further improving the load-bearing capacity of the frame tray 3. In addition, the length of the second support portion 322 along the extension direction of the support member 32 must be greater than or equal to 40 mm to facilitate the installation of the battery 1 and / or the support assembly 33.

[0090] In some optional embodiments of this application, the protective plate 2 includes a base plate 22; the second support surface 3221 is parallel to the base plate 22, and the angle α between the second support surface 3221 and the first support surface 3211 satisfies 90°≤α≤100°. It is understood that the bottom of the battery 1 is usually parallel to the base plate 22.

[0091] Generally, during the assembly of the battery pack 100, the frame tray 3 is usually inverted onto the battery 1 to assemble the frame tray 3 and the battery 1. Based on this, when the second support surface 3221 is parallel to the base plate 22, and the angle α between the first support surface 3211 and the second support surface 3221 satisfies 90°≤α≤100°, for the two opposing support members 32, the distance between the first support portions 321 of the two support members 32 near the frame 31 is greater than or equal to the distance between the first support portions 321 of the two support members 32 away from the frame 31. In this way, not only can the overall space occupied by the support members 32 in the width direction of the battery pack 100 be reduced, but the installation space of the battery 1 can also be guaranteed, reducing the assembly difficulty of the frame tray 3 and the battery 1.

[0092] It should be noted that the specific value of the angle α between the second support surface 3221 and the first support surface 3211 is not limited in the embodiments of this application, and those skilled in the art can adjust it according to actual needs. For example, the angle α between the second support surface 3221 and the first support surface 3211 can be 90°, 91°, 95°, 97° or 100°.

[0093] In some optional embodiments of this application, the frame 31 includes a first connecting portion 311 and a second connecting portion 312 spaced apart along a first direction X; a plurality of support members 32 are symmetrically arranged on the first connecting portion 311 and the second connecting portion 312. In this way, the symmetrically distributed support members 32 can evenly transfer the weight of the battery 1 to both sides of the frame 31, achieving mechanical balance, thereby further improving the load-bearing stability of the frame tray 3.

[0094] It should be noted that, taking the multiple support members 32 connected to the first connecting part 311 as an example, the multiple support members 32 can be arranged at uniform intervals or at non-uniform intervals, which is not limited here, and those skilled in the art can adjust them according to actual needs. It is understood that when the multiple support members 32 are arranged at uniform intervals, the force transmitted to the first connecting part 311 can be evenly distributed, which is beneficial to further improve the load-bearing stability of the skeleton pallet 3.

[0095] In some alternative embodiments of this application, such as Figure 9 As shown, the support member 32 connected to the first connecting part 311 is the first support member 324, and the support member 32 connected to the second connecting part 312 is the second support member 325; the skeleton tray 3 also includes a support assembly 33, which is disposed between the first support member 324 and the second support member 325 and is connected to the first support member 324 and the second support member 325 respectively, and the support assembly 33 is at least partially connected to the battery 1.

[0096] In this embodiment, a support component 33 is provided, which is connected to the first support member 324 and the second support member 325, as well as to the battery 1. This avoids potential localized damage caused by direct contact between the battery 1 and the first and second support members 324 and 325. Furthermore, compared to a direct connection between the battery 1 and the first and second support members 324 and 325, the contact area between the battery 1 and the support component 33 is larger, allowing for better dispersion of the battery's load and further improving the load-bearing reliability of the frame tray 3.

[0097] It should be noted that the supporting component 33 and the support member 32 (including the first support member 324 and / or the second support member 325) can be integrally formed or separately formed, without limitation, and those skilled in the art can adjust them according to actual needs. It is understood that when the supporting component 33 and the support member 32 are integrally formed, not only can the overall structural strength of the frame tray 3 be enhanced, thereby improving the support reliability of the battery 1; but also the assembly steps can be simplified, thereby improving the assembly efficiency of the battery pack casing and the battery pack 100. When the supporting component 33 and the support member 32 are separately formed, the processing difficulty and processing cost of the frame tray 3 can be reduced.

[0098] In some alternative embodiments of this application, such as Figures 10-11As shown, the support assembly 33 includes: a first support plate 331 and a second support plate 332; the first support plate 331 and the second support plate 332 are spaced apart along a first direction X, the first support plate 331 is connected to a first support member 324, the second support plate 332 is connected to a second support member 325, and the first support plate 331 and the second support plate 332 are adapted to be connected to at least a portion of the battery 1.

[0099] In this embodiment, a first support plate 331 connected to the first support member 324 and a second support plate 332 connected to the second support member 325 are provided, and the first support plate 331 and the second support plate 332 are adapted to be at least partially connected to the battery 1. This avoids potential localized damage caused by direct contact between the battery 1 and the first support member 324 and the second support member 325. Furthermore, compared to a direct connection between the battery 1 and the first support member 324 and the second support member 325, the larger contact area between the battery 1 and the first support plate 331 and the second support plate 332 allows for better force distribution, further improving the load-bearing reliability of the frame tray 3.

[0100] It should be noted that, taking the first support plate 331 and the first support member 324 as examples, the first support plate 331 and the first support member 324 can be integrally formed or separately formed; this is not limited here, and those skilled in the art can adjust them according to actual needs. It is understood that when the first support plate 331 and the first support member 324 are integrally formed, not only can the overall structural strength of the frame tray 3 be enhanced, thereby improving the support reliability of the battery 1, but the assembly steps can also be simplified, thereby improving the assembly efficiency of the battery pack casing and the battery pack 100. When the first support plate 331 and the first support member 324 are separately formed, the processing difficulty and processing cost of the frame tray 3 can be reduced. Furthermore, the second support plate 332 and the second support member 325 are similarly described, and will not be elaborated upon here.

[0101] In some optional embodiments of this application, the support assembly 33 further includes a third support plate 333, which is disposed between the first support plate 331 and the second support plate 332 and is connected to the first support plate 331 and the second support plate 332 respectively, and the third support plate 333 is adapted to be connected to at least a portion of the battery 1.

[0102] In this embodiment, since a third support plate 333 is provided between the first support plate 331 and the second support plate 332, by connecting at least a portion of the battery 1 to the third support plate 333, the contact area can be further increased, the force can be better dispersed, and the load-bearing reliability of the skeleton tray 3 can be further improved.

[0103] It should be noted that the connection methods between the third support plate 333 and the first support plate 331 and the second support plate 332, as well as between the first support plate 331 and the first support member 324, and between the second support plate 332 and the second support member 325, are not limited in this embodiment. Those skilled in the art can make adjustments according to actual needs. In one embodiment, taking the first support plate 331 and the first support member 324 as an example, the third support plate 333 and the first support plate 331 can be connected by riveting, and the first support plate 331 and the first support member 324 can be connected by welding. It should be noted that the second support plate 332 and the second support member 325 are connected similarly, and will not be described in detail here. In addition, the support assembly 33 can also be a single piece of metal plate, such as a steel plate. By connecting the steel plate to the first support member 324 and the second support member 325 on both sides along the first direction X, the battery 1 can be reliably supported.

[0104] In some optional embodiments of this application, the third support plate 333 is a cold plate, that is, the cold plate is used as part of the support component 33. In this way, not only can reliable heat dissipation of the battery 1 be achieved, but also the structural components of the skeleton tray 3 can be reduced, thereby simplifying the structure of the skeleton tray 3, reducing its weight, and improving the weight energy density of the battery pack 100.

[0105] In some optional embodiments of this application, the skeleton tray 3 is further provided with a plurality of first hollow portions 35, each first hollow portion 35 being formed by two adjacent first support members 324, a first connecting portion 311, and a supporting component 33, and the first hollow portion 35 is adapted to expose at least a portion of the battery 1; and / or, the skeleton tray 3 is further provided with a plurality of second hollow portions 36, each second hollow portion 36 being formed by two adjacent second support members 325, a first connecting portion 311, and a supporting component 33, and the second hollow portion 36 is adapted to expose at least a portion of the battery 1.

[0106] In this embodiment, the first hollow portion 35 and the second hollow portion 36 are provided, making the frame tray 3 a hollow structure, which significantly reduces the weight of the frame tray 3 and achieves lightweighting of the battery pack casing. Furthermore, in related technologies, the battery pack tray has poor maintainability, typically requiring the entire battery pack to be removed from the vehicle body for repair. However, in this embodiment, since at least a portion of the battery 1 is exposed through the first hollow portion 35 and / or the second hollow portion 36, repairing the battery 1 does not require disassembling the entire battery pack 100; only the protective plate 2 needs to be removed for disassembly and repair. This improves the maintainability of the battery pack 100 and reduces repair difficulty and costs.

[0107] Specifically, such as Figure 12As shown, battery 1 includes a battery module 11 and a sampling module 12. The sampling module 12 is disposed at at least one end of the battery module 11 along a first direction X and is electrically connected to the battery module 11. The sampling module 12 is used to collect electrical signals of the battery module 11, such as voltage and current. The first cutout portion 35 and / or the second cutout portion 36 are adapted to expose at least a portion of the sampling module 12 and / or the battery module 11.

[0108] In this embodiment, since at least a portion of the sampling module 12 and / or the battery module 11 is exposed in the first cutout portion 35 and / or the second cutout portion 36, when repairing the sampling module 12 and / or the battery module 11, it is not necessary to disassemble the entire battery pack 100. Instead, only the protective plate 2 needs to be removed to disassemble and repair the sampling module 12 and / or the battery module 11 from the side. This is beneficial to improving the maintainability of the battery pack 100 and reducing the difficulty and cost of repair.

[0109] In some optional embodiments of this application, the sum of the projected areas of the plurality of first hollow portions 35 in the first direction X is S1; the sum of the projected areas of the plurality of first support members 324 in the first direction X is S2, satisfying: 0.6≤S1 / (S1+S2)≤0.8; and / or, the sum of the projected areas of the plurality of second hollow portions 36 in the first direction X is S3; the sum of the projected areas of the plurality of second support members 325 in the first direction X is S4, satisfying: 0.6≤S3 / (S3+S4)≤0.8.

[0110] Generally speaking, the more first support members 324 and / or second support members 325 there are, the more fixing points the supporting component 33 has, the higher the installation stability of the supporting component 33, and the better the load-bearing effect of the battery 1. However, the maintenance of the battery pack 100 becomes more difficult. Taking one side of the skeleton tray 3 (such as the side with the first hollow part 35) as an example, the sum of the projected areas of multiple first hollow parts 35 in the first direction X is S1, and the sum of the projected areas of multiple first support members 324 in the first direction X is S2. The maintainability of the battery pack 100 can be evaluated by S1 / (S1+S2). When S1 / (S1+S2) is larger, the hollow area on one side of the skeleton tray 3 is larger. At this time, the range of removable maintenance of the battery pack 100 is larger, but the installation contact area between the supporting component 33 and the first support member 324 is smaller. Based on this, by controlling S1 / (S1+S2) within the range of 0.6 to 0.8, not only can the supporting component 33 and the first support member 324 have sufficient installation contact area, thereby improving the installation stability of the supporting component 33 and thus improving the load-bearing capacity of the battery 1, but also sufficient side maintenance space can be ensured for subsequent disassembly and maintenance. It is understood that the same applies to the other side of the frame tray 3 (i.e., the side with the second perforated portion 36), which will not be elaborated here.

[0111] It should be noted that the specific values ​​of S1 / (S1+S2) and S3 / (S3+S4) are not limited in this application embodiment, and those skilled in the art can adjust them according to actual needs. It is understood that when the first support member 324 and the second support member 325 are symmetrically arranged, the values ​​of S1 / (S1+S2) and S3 / (S3+S4) should be consistent. For example, S1 / (S1+S2) and S3 / (S3+S4) can be 0.6, 0.65, 0.7, 0.78, 0.8, or other values. Furthermore, the width of the support member 32 (including the first support member 324 and the second support member 325) along the second direction Y is not limited in this application embodiment, and those skilled in the art can adjust it according to actual needs. In one embodiment, the width of the support member 32 (including the first support member 324 and the second support member 325) along the second direction Y is 40mm to 60mm. This allows a single support member 32 to have sufficient structural strength. For example, the width of the support member 32 along the second direction Y can be 40mm, 43mm, 50mm, 58mm, 60mm or other values.

[0112] In some alternative embodiments of this application, such as Figure 11 As shown, the skeleton pallet 3 also includes a plurality of expansion beams 34. The expansion beams 34 are disposed on the side of the support assembly 33 away from the guard plate 2, and the plurality of expansion beams 34 are spaced apart along the second direction Y, which intersects with the first direction X. The two ends of an expansion beam 34 along the first direction X are respectively connected to a first support member 324 and a second support member 325.

[0113] Generally, battery 1 expands due to temperature rise during charging and discharging. In this embodiment, multiple expansion beams 34 are provided. These beams can absorb the expansion of battery 1 during charging and discharging through their own elastic deformation or reserved gaps, thereby achieving thermal expansion compensation and improving the structural safety of the battery pack casing and battery pack 100. Since the multiple expansion beams 34 are spaced apart along the second direction Y, and both ends of each expansion beam 34 are connected to a first support member 324 and a second support member 325 respectively, a grid structure can be formed, significantly improving the overall rigidity of the frame tray 3 and enhancing the impact resistance of the battery pack casing and battery pack 100.

[0114] It should be noted that the number of expansion beams 34 is not limited in this application embodiment, and those skilled in the art can adjust it according to actual needs. It is understood that the number of expansion beams 34 should be less than or equal to the number of the first support member 324 or the second support member 325. Furthermore, the connection method between the expansion beams 34 and the first support member 324 and the second support member 325 is not limited in this application embodiment, and those skilled in the art can adjust it according to actual needs. In one embodiment, the two ends of the expansion beam 34 along the first direction X are respectively connected to the first support portion 321 of the first support member 324 and the first support portion 321 of the second support member 325 by arc welding. Further, to improve the overall integrity of the battery pack casing, the side of the expansion beam 34 near the third support plate 333 can be bonded to the third support plate 333 by structural adhesive. Thus, the dual fixation through welding and bonding can ensure the installation stability of the expansion beam 34 and the overall pack mode.

[0115] Generally, battery 1 includes a battery module 11 and a power distribution box 13. The power distribution box 13 is disposed at one end of the battery module 11 along the second direction Y and is electrically connected to the battery module 11. The power distribution box 13 is used to transmit electrical signals from the battery module 11. Based on this, in some optional embodiments of this application, such as Figures 11-12 As shown, the frame 31 further includes a third connecting portion 313 and a fourth connecting portion 314, which are spaced apart along the second direction Y and are both located between the first connecting portion 311 and the second connecting portion 312; the frame tray 3 is also provided with a third hollow portion 37, which is formed by the third connecting portion 313, the first connecting portion 311, the second connecting portion 312, and the expansion beam 34 near the third connecting portion 313, and the third hollow portion 37 is suitable for exposing at least a portion of the distribution box 13. Furthermore, the distribution box 13 can be fixed to the inner surface of the cover plate 4 by bolts.

[0116] In this embodiment, the third cutout 37 is provided, exposing at least a portion of the distribution box 13. Therefore, when repairing the distribution box 13, it is not necessary to disassemble the entire battery pack 100; only the protective plate 2 needs to be removed to disassemble and repair the distribution box 13 from below. This improves the maintainability of the battery pack 100 and reduces repair difficulty and cost.

[0117] In specific applications, the distribution box 13 also includes at least one power distribution interface 131, wherein the power distribution interface 131 includes a high-voltage power distribution interface and / or a low-voltage power distribution interface. The side plate 23 has a notch 232 at a position corresponding to the third connecting portion 313. Specifically, the notch 232 is formed by a recess on the side of the side plate 23 facing away from the bottom plate 22 towards the direction closer to the bottom plate 22. The third connecting portion 313 is adaptively bent to accommodate the notch 232. The cover plate 4 has an end cap 42 at a position corresponding to the third connecting portion 313. Specifically, the end cap 42 is formed by a protrusion on the cover plate 4 towards the direction closer to the third connecting portion 313, and the shape of the end cap 42 is adapted to the notch 232. By placing the power distribution interface 131 of the distribution box 13 on the end cap 42, not only is wiring of the distribution box 13 easier, but the space occupied by the receiving cavity 21 can also be reduced, thereby providing more installation space for the battery module 11 and further improving the weight energy density of the battery pack 100. Furthermore, the cold plate also includes a cooling channel and a cooling interface 3331. The cooling channel is located inside the cold plate, and the cooling interface 3331 is located on the end cover 42. The cooling interface 3331 is used to connect to external liquid cooling equipment and the cooling channel respectively, thereby realizing the circulation of the cooling medium. In this way, by placing the cooling interface 3331 on the end cover 42, the space occupied by the receiving cavity 21 can be further reduced, the installation space of the battery module 11 can be increased, and it is beneficial to further improve the weight energy density of the battery pack 100.

[0118] In some optional embodiments of this application, the frame 31 and the support member 32 are integrally formed structures.

[0119] In this embodiment, since the frame 31 and the support 32 are integrally formed, on the one hand, the assembly process of the skeleton pallet 3 can be simplified, which is beneficial to improving the production efficiency of the skeleton pallet 3. On the other hand, the mechanical properties of the frame 31 and the support 32 can be more uniform, thereby improving the structural strength and deformation resistance of the skeleton pallet 3, and further improving the overall load-bearing stability and durability of the skeleton pallet 3.

[0120] In one embodiment, the frame 31 and the support 32 can be an integral die-cast structure. It is understood that "integral die-cast structure" refers to an integrally formed structure manufactured using the die-casting process. By injecting molten metal (such as aluminum alloy or magnesium alloy) at high speed into a precision mold under high pressure, the molten metal fills the mold cavity and solidifies rapidly under high pressure, which strengthens the overall integrity of the skeleton tray 3, thereby further improving the overall load-bearing stability and durability of the skeleton tray 3. Furthermore, the high strength characteristics of the die-cast structure enable reliable transmission of mechanical loads, further enhancing the load-bearing stability of the skeleton tray 3. It should be noted that the materials of the skeleton tray 3 include, but are not limited to, aluminum alloy and magnesium alloy.

[0121] It should be noted that the frame 31 and the support member 32 can also be separately formed structures. In one embodiment, the frame 31 and the support member 32 can be processed separately using a stamping process, and then connected by welding. Specifically, the first connecting part 311, the second connecting part 312, the third connecting part 313, and the fourth connecting part 314 of the frame 31 can be welded together, and the first connecting part 311 and the first support member 324, and the second connecting part 312 and the second support member 325 can be spot welded together. This improves manufacturing flexibility and facilitates local structural optimization.

[0122] In some alternative embodiments of this application, such as Figure 8 As shown, the support member 32 is also provided with a reinforcing rib 323, which is formed by at least a portion of the support member 32 protruding toward the side near the guard plate 2. The reinforcing rib 323 may extend along the length of the support member 32.

[0123] In this embodiment, by providing reinforcing ribs 323, the structural strength of the support member 32 can be improved, thereby further enhancing the load-bearing reliability of the support member 32. Since the reinforcing ribs 323 are formed by at least a portion of the support member 32 protruding towards the side closest to the protective plate 2, the side of the support member 32 facing away from the protective plate 2 can be planar. This increases the contact area between the support member 32 and other components, such as the aforementioned support assembly 33 and expansion beam 34, improving the connection reliability between the support member 32 and other components, and further enhancing the overall structural strength of the skeleton pallet 3.

[0124] In some alternative embodiments of this application, such as Figure 2 As shown, the battery pack housing also includes a first sealing element 5, which is disposed between the protective plate 2 and the frame 31. Specifically, the first sealing element 5 is disposed between the first overlapping edge 231 of the protective plate 2 and the overlapping portion 315 of the frame 31. In this way, by providing the first sealing element 5 between the first overlapping edge 231 and the overlapping portion 315, a sealed connection between the first overlapping edge 231 and the overlapping portion 315 can be achieved, thereby improving the sealing effect between the protective plate 2 and the frame tray 3.

[0125] It should be noted that the material of the first sealing element 5 is not limited in the embodiments of this application, and those skilled in the art can adjust it according to actual needs. In one embodiment, the first sealing element 5 is sealing foam. On the one hand, sealing foam has low hardness and high resilience, which can play a sealing and buffering role, achieving dynamic sealing. On the other hand, the sealing foam usually abuts against the first overlapping edge 231 and the overlapping part 315, which facilitates the subsequent disassembly and assembly of the protective plate 2, thereby improving the maintainability of the battery pack 100. Furthermore, sealing foam with a compression ratio of 25% to 30% can be selected to achieve effective dynamic sealing under the action of bolt preload.

[0126] In some optional embodiments of this application, the battery pack housing further includes a second sealing member 6, which is disposed between the cover plate 4 and the frame 31. Specifically, the second sealing member 6 is disposed between the second overlapping edge 41 of the cover plate 4 and the overlapping portion 315 of the frame 31. In this way, by providing the second sealing member 6 between the second overlapping edge 41 and the overlapping portion 315, a sealed connection between the second overlapping edge 41 and the overlapping portion 315 can be achieved, thereby improving the sealing effect between the cover plate 4 and the frame tray 3.

[0127] It should be noted that the material of the second sealing element 6 is not limited in the embodiments of this application, and those skilled in the art can adjust it according to actual needs. In one embodiment, the second sealing element 6 is a sealing structural adhesive. In this way, not only can a reliable seal be achieved between the cover plate 4 and the frame tray 3, but also a reliable connection between the cover plate 4 and the frame tray 3 can be achieved, thereby improving the integrity and structural durability of the battery pack casing and the battery pack 100. The type of sealing structural adhesive includes, but is not limited to, acrylic structural adhesive, silicone structural adhesive, polyurethane structural adhesive, epoxy resin structural adhesive or other types, and is not limited here. Those skilled in the art can adjust it according to actual needs.

[0128] In some alternative embodiments of this application, such as Figure 4 As shown, the battery pack casing also includes an insulation component 7, which is disposed on the side of the protective plate 2 near the frame tray 3. Specifically, the insulation component 7 can be disposed on the side of the bottom plate 22 near the frame tray 3 and at least cover the cold plate. The insulation component 7 can be a polymer foam material such as PP (polypropylene) or PU (polyurethane) with a density ρ ≥ 0.12 g / cm³. 3 Thermal conductivity ≤0.026W / (m·K).

[0129] In this embodiment, by providing the heat insulation component 7, on the one hand, it can play a heat preservation role, improve the cooling performance of the cold plate, and thus improve the heat dissipation effect of the battery 1. On the other hand, in the event of a collision with the base plate 22, the heat insulation component 7 can play a buffering and energy absorption role, thereby effectively reducing the impact of external impact on the battery 1 and improving the safety of the battery pack 100.

[0130] It should be noted that the thickness of the insulation component 7 in the third direction Z is not limited in this embodiment, and those skilled in the art can adjust it according to actual needs. In one embodiment, the thickness of the insulation component 7 in the third direction Z needs to be greater than or equal to 5mm to simultaneously meet the insulation and impact resistance requirements of the battery pack 100. Furthermore, the insulation component 7 can be a pre-cut sheet bonded to the base plate 22 with structural adhesive, or, after the protective plate 2 and the frame tray 3 are fully assembled, a mixed foaming agent can be injected into the gap between the base plate 22 and the support component 33 using an online foaming method. After a period of time, the foaming agent expands and fills the gap, bonding the support component 33 and the base plate 22 together, thus saving on the amount of structural adhesive used. No limitation is made here, and those skilled in the art can choose according to actual needs. It is understood that when the protective plate 2 is used as a maintenance cover, the insulation component 7 is preferably made of pre-cut sheet to avoid affecting the disassembly of the protective plate 2.

[0131] In some alternative embodiments of this application, such as Figure 6 As shown, the frame 31 includes an overlapping portion 315 and two first flanges 316. The two first flanges 316 are spaced apart along a first direction X, and each first flange 316 is connected to the side of the overlapping portion 315 opposite to the center of the receiving cavity 21. The overlapping portion 315 is sealed to the protective plate 2, and the first flanges 316 are adapted to be connected to the vehicle body. It can be understood that the first connecting portion 311 and the second connecting portion 312 of the frame 31 both include the overlapping portion 315 and the two first flanges 316, and the third connecting portion 313 and the fourth connecting portion 314 of the frame 31 both include the overlapping portion 315.

[0132] In this embodiment, the first flange 316 is provided, and the battery pack housing can be reliably fixed to the vehicle body through the connection between the first flange 316 and the vehicle body, thereby achieving reliable fixation of the battery pack 100. Furthermore, the weight of the battery 1 can be transferred to the vehicle body sequentially through the support member 32 and the frame 31, which helps improve the reliability of the load-bearing capacity of the battery 1.

[0133] In some optional embodiments of this application, the first flange 316 is provided with a plurality of connecting holes 3161, which are spaced apart along a second direction Y, the second direction Y intersecting the first direction X; a plurality of fourth hollow portions 3162 are provided on the side of the first flange 316 away from the overlapping portion 315, at least one fourth hollow portion 3162 being located between two adjacent connecting holes 3161. Specifically, a sleeve can be welded to the connecting hole 3161 for connection with a bolt.

[0134] In this embodiment, by providing the connecting hole 3161, when the battery pack housing is assembled to the vehicle body, a reliable fixation of the battery pack housing can be achieved by passing bolts through the connecting hole 3161 and connecting them to the vehicle body. Furthermore, by providing a fourth hollow portion 3162, with at least one fourth hollow portion 3162 located between two adjacent connecting holes 3161, the overall weight of the frame tray 3 can be further reduced, achieving lightweighting of the frame tray 3.

[0135] It should be noted that the embodiments of this application do not limit the number of connection holes 3161 or the spacing between two adjacent connection holes 3161. Those skilled in the art can adjust these according to actual needs, such as the length of the battery pack casing or the distribution of connection points on the vehicle body. When multiple connection holes 3161 are provided, they can be arranged at uniform or non-uniform intervals; this is not limited here, and those skilled in the art can adjust them according to actual needs. In one embodiment, each first flange 316 is provided with four connection holes 3161, and the four connection holes 3161 are arranged at non-uniform intervals to better adapt to the connection points on the vehicle body.

[0136] In practical applications, this application does not limit the spacing between two adjacent fourth hollow portions 3162, and those skilled in the art can adjust it according to actual needs. In one embodiment, taking a first flange 316 as an example, the spacing between every two adjacent fourth hollow portions 3162 is the same and greater than 50mm. This not only reduces the processing difficulty of the frame 31, but also improves the connection stability between the frame 31 and the vehicle body. In addition, the minimum width of the first flange 316, that is, the width of the first flange 316 at the location of the fourth hollow portion 3162, needs to meet 25mm~45mm, so that the frame tray 3 has sufficient lateral impact resistance.

[0137] Furthermore, the frame 31 also includes two second flanges 317, which are spaced apart along the first direction X, and each second flange 317 is connected to the side of the overlapping portion 315 near the center of the receiving cavity 21. By connecting the support member 32 to the second flanges 317, specifically by connecting the first support portion 321 of the support member 32 to the side of the second flange 317 away from the center of the receiving cavity 21, a complete force transmission path can be formed. This allows part of the force exerted by the battery 1 on the second support portion 322 to be transmitted to the vehicle body sequentially through the first support portion 321, the second flange 317, the overlapping portion 315, and the first flange 316, which helps to improve the load-bearing reliability of the battery 1.

[0138] In summary, the battery pack housing provided in this application embodiment has at least the following advantages:

[0139] In this embodiment, a protective plate and a frame tray are provided. The protective plate has a receiving cavity, and the frame tray is disposed within the receiving cavity. The frame of the frame tray is sealed to the edge of the opening of the receiving cavity, and the support member of the frame tray is adapted to be at least partially connected to the battery. Thus, on the one hand, by placing the battery within the receiving cavity, not only can the battery be isolated from the external environment, thereby achieving a sealing function, but the bottom plate structure of the frame tray can also be reduced, thereby simplifying the structure of the frame tray and the battery pack housing and achieving a lightweight battery pack housing. On the other hand, by connecting the battery to the support member, the support member can support the battery, thereby achieving a load-bearing function. In summary, by separating the sealing and load-bearing functions, with the protective plate undertaking the sealing function and the frame tray undertaking the load-bearing function, the structure of the battery pack housing can be simplified, the weight reduced, and the space occupied by the battery pack decreased. This allows for more installation space for the battery, which is beneficial for improving the weight energy density of the battery pack.

[0140] like Figures 1-2 As shown, this application embodiment also provides a battery pack 100, including: a battery 1 and a battery pack housing of any of the above embodiments; the battery 1 is disposed in the receiving cavity 21, and at least a portion of the battery 1 is connected to the end of the support member 32 away from the frame 31.

[0141] In this embodiment, since the battery 1 is housed within the receiving cavity 21, it not only isolates the battery 1 from the external environment, thus achieving a sealing function, but also reduces the structure of the bottom plate 22 of the frame tray 3, thereby simplifying the structure of the frame tray 3 and the battery pack housing and achieving a lightweight battery pack housing. Since at least a portion of the battery 1 is connected to the support member 32, reliable support for the battery 1 can be achieved. In summary, by separating the sealing and load-bearing functions, with the protective plate 2 undertaking the sealing function and the frame tray 3 undertaking the load-bearing function, the structure of the battery pack housing can be simplified, its weight reduced, and the space occupied by the battery pack 100 decreased. This allows for more installation space for the battery 1, which is beneficial for improving the weight energy density of the battery pack 100.

[0142] It should be noted that in this embodiment, the structure of the battery pack housing is the same as that of the battery pack housing in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0143] In practical applications, the battery pack 100 includes a battery module 11, a sampling module 12 and a power distribution box 13 electrically connected to the battery module 11. The sampling module 12 is used to collect electrical signals of the battery module 11, such as voltage and current, and the power distribution box 13 is used to transmit the electrical signals of the battery module 11.

[0144] Specifically, the sampling module 12 is disposed at at least one end of the battery module 11 along the first direction X. At least a portion of the sampling module 12 and / or the battery module 11 is exposed through the first cutout portion 35 and / or the second cutout portion 36. Thus, when repairing the sampling module 12 and / or the battery module 11, it is not necessary to disassemble the entire battery pack 100; only the protective plate 2 needs to be removed to repair the sampling module 12 and / or the battery module 11 from the side of the battery pack housing. This improves the maintainability of the battery pack 100 and reduces repair difficulty and cost. The distribution box 13 is disposed at one end of the battery module 11 along the second direction Y and is at least partially exposed through the third cutout portion 37. Thus, when repairing the distribution box 13, it is not necessary to disassemble the entire battery pack 100; only the protective plate 2 needs to be removed to disassemble and repair the distribution box 13 from below the battery pack housing. This improves the maintainability of the battery pack 100 and reduces repair difficulty and cost.

[0145] This application also provides an electrical device, including a battery pack 100 from any of the above embodiments. In this application embodiment, by separating the sealing function and the load-bearing function of the battery pack housing, with the protective plate 2 undertaking the sealing function and the frame tray 3 undertaking the load-bearing function, the structure of the battery pack housing can be simplified and its weight reduced, thereby increasing the weight energy density of the battery pack 100 and improving the battery life of the electrical device.

[0146] It should be noted that in this embodiment, the structure of the battery pack 100 is the same as that of the battery pack 100 in any of the above embodiments, and its beneficial effects are similar, so they will not be described in detail here. The electrical equipment includes, but is not limited to, vehicles, ships, and aircraft.

[0147] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0148] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack housing, characterized in that, include: Protective panels and frame trays; The protective plate is provided with an open receiving cavity; At least a portion of the skeleton tray is disposed within the receiving cavity. The skeleton tray includes a frame and a plurality of support members. The frame extends circumferentially along the protective plate and is sealed to the edge of the opening. The plurality of support members are spaced apart circumferentially along the protective plate and are connected to the frame. One end of each support member opposite to the frame is adapted to be connected to at least a portion of the battery to support the battery. The frame includes a first connecting portion and a second connecting portion that are spaced apart along a first direction; Multiple support members are symmetrically arranged on the first connecting portion and the second connecting portion. The support member connected to the first connecting portion is a first support member, and the support member connected to the second connecting portion is a second support member. Multiple first support members are spaced apart, and multiple second support members are spaced apart.

2. The battery pack housing according to claim 1, characterized in that, The support member includes a first support portion and a second support portion connected to each other. The first support portion has a first support surface facing away from the protective plate, and the second support portion has a second support surface facing away from the protective plate. The second support surface is set at an angle to the first support surface. The first support portion is connected to the frame, and the second support portion is adapted to be connected to at least a portion of the battery.

3. The battery pack housing according to claim 2, characterized in that, The protective plate includes a base plate; The second support surface is parallel to the base plate, and the angle α between the second support surface and the first support surface satisfies 90°≤α≤100°.

4. The battery pack housing according to claim 1, characterized in that, The skeleton tray further includes a support assembly disposed between the first support member and the second support member and connected to the first support member and the second support member respectively, and the support assembly is adapted to be connected to at least a portion of the battery.

5. The battery pack housing according to claim 4, characterized in that, The frame tray is also provided with a plurality of first hollow portions, each first hollow portion being formed by two adjacent first support members, the first connecting portion, and the supporting assembly, and the first hollow portion being suitable for exposing at least a portion of the battery. And / or, the skeleton tray is further provided with a plurality of second cutouts, each second cutout being formed by two adjacent second supports, the first connecting portion, and the supporting assembly, the second cutouts being adapted to expose at least a portion of the battery.

6. The battery pack housing according to claim 5, characterized in that, The sum of the projected areas of the plurality of first hollow portions in the first direction is S1; The sum of the projected areas of the plurality of first support members in the first direction is S2, which satisfies: 0.6≤S1 / (S1+S2)≤0.8; And / or, the sum of the projected areas of the plurality of second hollow portions in the first direction is S3; The sum of the projected areas of the plurality of second support members in the first direction is S4, which satisfies: 0.6≤S3 / (S3+S4)≤0.8; And / or, the first cutout portion and / or the second cutout portion are adapted to expose at least a portion of the sampling module and / or the battery module.

7. The battery pack housing according to claim 4, characterized in that, The support assembly includes: a first support plate and a second support plate; The first support plate and the second support plate are spaced apart along the first direction. The first support plate is connected to the first support member, and the second support plate is connected to the second support member. The first support plate and the second support plate are adapted to be connected to at least a portion of the battery.

8. The battery pack housing according to claim 7, characterized in that, The support assembly further includes a third support plate, which is disposed between the first support plate and the second support plate and is connected to the first support plate and the second support plate respectively, and the third support plate is adapted to be connected to at least a portion of the battery.

9. The battery pack housing according to claim 4, characterized in that, The skeleton tray also includes a plurality of expansion beams, which are disposed on the side of the support assembly away from the protective plate, and the plurality of expansion beams are spaced apart along a second direction, which intersects with the first direction; One of the expansion beams is connected to a first support member and a second support member at both ends along the first direction.

10. The battery pack housing according to claim 9, characterized in that, The frame further includes a third connecting part and a fourth connecting part, wherein the third connecting part and the fourth connecting part are spaced apart along the second direction and are both located between the first connecting part and the second connecting part; The frame tray is also provided with a third hollow section, which is formed by the third connecting section, the first connecting section, the second connecting section, and the expansion beam near the third connecting section. The third hollow section is suitable for exposing at least a portion of the distribution box.

11. The battery pack housing according to claim 1, characterized in that, The frame and the support are integrally formed; And / or, the support member is further provided with reinforcing ribs, which are formed by at least a portion of the support member protruding toward the side close to the guard plate; And / or, the battery pack housing further includes: a first seal, the first seal being disposed between the protective plate and the frame; And / or, the battery pack housing further includes: a cover plate, the cover plate being disposed over the opening, and the cover plate being sealed to the frame; And / or, the battery pack housing further includes: a heat insulation component, the heat insulation component being disposed on the side of the protective plate near the frame tray; And / or, the frame includes: an overlapping portion and two first flanges, the two first flanges being spaced apart along a first direction, and each first flange being connected to the side of the overlapping portion opposite to the center of the receiving cavity; The overlapping portion is sealed to the protective plate, and the first flange is adapted to be connected to the vehicle body.

12. The battery pack housing according to claim 11, characterized in that, The frame and the support are integrally die-cast structures; And / or, the battery pack housing further includes: a second seal, the second seal being disposed between the cover plate and the frame; And / or, the first flange is provided with a plurality of connecting holes, the plurality of connecting holes being spaced apart along a second direction, the second direction intersecting the first direction; The first flange has a plurality of fourth hollowed-out portions on the side away from the overlapping portion, and at least one of the fourth hollowed-out portions is located between two adjacent connecting holes.

13. A battery pack, characterized in that, include: The battery and the battery pack housing according to any one of claims 1-12; The battery is disposed within the receiving cavity, and at least a portion of the battery is connected to the end of the support member opposite to the frame.

14. An electrical appliance, characterized in that, Includes the battery pack as described in claim 13.

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