Tray assembly, battery pack and vehicle

Abstract

The utility model discloses a tray assembly, battery pack and vehicle wherein the tray assembly comprises: a tray main body, the first side of the tray main body is adapted to face a battery, at least part of the first side of the tray main body forms a thermoplastic body; and the heating body is suitable for heating the battery, and the heating body is embedded in the thermoplastic body, so that the heating body is connected with the tray main body. According to the tray assembly disclosed by the utility model, at least part of the first side of the tray main body is arranged to be the thermoplastic body, so that the heating body can be integrated on the tray main body in a heating and pressurizing manner, the assembly efficiency is high, and a complicated fixing structure does not need to be arranged, so that the structure of a battery pack can be simplified, and the production cost can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a tray assembly, a battery pack and a vehicle. Background Art

[0002] In the related art, when the battery pack is used in a low temperature environment such as high latitudes or in winter, it is usually necessary to heat the battery pack to improve its performance. The existing solution for heating the battery pack is mainly to set a heating element on the surface of the battery pack, and a fixed structural member is required to fix the heating element. This heating solution has a complex structure, low assembly efficiency, high product cost, and is not conducive to cost control. Utility Model Content

[0003] The first object of the utility model is to provide a new technical solution for a tray assembly, which can at least solve the problem of complex assembly structure of existing battery packaging.

[0004] The second object of the present utility model is to provide a battery pack, comprising the above-mentioned tray assembly.

[0005] The third object of the present utility model is to provide a vehicle, comprising the above-mentioned battery pack.

[0006] According to a first aspect of the utility model, a tray assembly is provided, comprising: a tray body, a first side of the tray body being adapted to face a battery, at least a portion of the first side of the tray body being formed as a thermoplastic body; a heating body, the heating body being adapted to heat the battery, the heating body being embedded in the thermoplastic body so as to be connected to the tray body.

[0007] Optionally, the tray body is formed as an integrally formed fiber composite insulation member.

[0008] Optionally, the pallet body comprises: a thermoplastic body, a first side of the thermoplastic body being the first side of the pallet body; a plurality of fiber layers, the plurality of fiber layers being stacked in the thermoplastic body, and the thermoplastic body connecting the plurality of fiber layers.

[0009] Optionally, a plurality of convex ribs are provided on the first side of the tray body, the convex ribs are staggered from the heating body, and the convex ribs are suitable for defining the thickness of glue between the battery and the first side of the tray body.

[0010] Optionally, the tray body is provided with a receiving groove suitable for receiving batteries, and at least one dividing rib is provided on the inner side of the receiving groove, and the dividing rib divides the receiving groove into a plurality of sub-receiving spaces.

[0011] Optionally, the second side of the pallet body is away from the first side of the pallet body, and the second side of the pallet body is provided with a plurality of reinforcing ribs.

[0012] Optionally, a lifting lug is provided on the outer periphery of the tray body, and the lifting lug is suitable for connection with a vehicle body. The tray assembly further comprises a reinforcement member, and the reinforcement member is embedded in the lifting lug.

[0013] Optionally, the pallet assembly further includes: a bottom guard plate, the bottom guard plate is suitable for being connected to the vehicle body, the bottom guard plate is arranged on the second side of the pallet body, and the bottom guard plate is connected to the pallet body.

[0014] Optionally, the bottom guard plate is provided with at least one compression rib, and the compression rib extends along the length direction or the width direction of the bottom guard plate.

[0015] Optionally, an extension portion is provided on the outer periphery of the bottom guard plate, the extension portion is matched with the lifting ear, and the extension portion is suitable for connection with the vehicle body.

[0016] Optionally, the pallet assembly further includes: at least one first connecting member, which is embedded in the second side of the pallet body; and at least one fastener, whose first end is connected to the first connecting member and whose second end cooperates with the pallet body to fix the bottom guard plate.

[0017] Optionally, the tray assembly further comprises: a fuse, wherein the fuse is electrically connected to the heating body and the fuse is embedded in the thermoplastic body.

[0018] Optionally, the heating body is formed as a heating wire, and the heating body includes a first functional segment and a second functional segment, wherein at least a portion of the flow area of ​​the first functional segment is smaller than the flow area of ​​the second functional segment, so that the first functional segment is formed as a safety segment.

[0019] Optionally, the first end of the first functional segment forms the first end of the heating body, the second end of the first functional segment is connected to the first end of the second functional segment, and the second end of the second functional segment forms the second end of the heating body.

[0020] Optionally, the first functional segment is stretchable so that the resistance value of the first functional segment is adjustable; and / or the second functional segment is stretchable so that the resistance value of the second functional segment is adjustable.

[0021] Optionally, the heating body can be deformed along with the tray body, and the heating body is suitable for being electrically connected to a detection unit of the battery pack.

[0022] According to a second aspect of the utility model, a battery pack is provided, comprising the above-mentioned tray assembly.

[0023] Optionally, the battery pack further comprises: a monitoring unit, the monitoring unit being electrically connected to the heating body, and the monitoring unit being adapted to monitor the resistance value of the heating body to identify the structural state of the tray body.

[0024] According to a third aspect of the utility model, a vehicle is provided, comprising the above-mentioned battery pack.

[0025] According to the tray assembly of the utility model, by setting at least a part of the first side of the tray body as a thermoplastic body, the heating body can be integrated on the tray body by heating and pressurizing, with high assembly efficiency and no need to set a complicated fixing structure, thereby simplifying the structure of the battery pack and effectively reducing production costs; and the set thermoplastic body has good insulation properties, and compared with the existing metal tray, it can effectively avoid short circuits between the battery and the tray body; at the same time, the thermoplastic body has good thermal insulation properties, which can effectively avoid the loss of heat from the heating body, thereby increasing the heating rate of the battery by the heating body.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] Figure 1 It is a structural schematic diagram of a tray assembly according to an embodiment of the utility model;

[0029] Figure 2 It is a structural schematic diagram of a tray body of a tray assembly according to an embodiment of the utility model;

[0030] Figure 3 It is a structural schematic diagram of a bottom guard plate of a tray assembly according to an embodiment provided by the utility model;

[0031] Figure 4 It is a cross-sectional view of the connection between the bottom guard plate of the tray assembly and the tray body according to an embodiment of the utility model;

[0032] Figure 5 It is a cross-sectional view of the connection between the tray assembly and the vehicle body according to an embodiment of the utility model;

[0033] Figure 6 It is a structural schematic diagram of a heating body of a tray assembly according to an embodiment of the utility model;

[0034] Figure 7 yes Figure 6 The enlarged schematic diagram of the middle circle A;

[0035] Figure 8 It is a schematic diagram of an exploded structure of a battery pack according to an embodiment of the utility model;

[0036] Fig. 9 It is an exploded view of a partial structure of a vehicle according to an embodiment of the utility model.

[0037] Reference numerals:

[0038] Tray assembly 100;

[0039] Pallet body 10; convex rib 11; separation rib 12; reinforcing rib 13; lifting lug 14;

[0040] Heating body 20; first functional section 21; second functional section 22;

[0041] reinforcement member 30;

[0042] Bottom guard plate 40; rib 41; extension portion 42;

[0043] A first connecting member 50; a fastening member 60;

[0044] Battery pack 200; Battery pack 210;

[0045] Car body 300 ; longitudinal beam 310 ; welding nut 311 ; steel sleeve 320 ; second connecting member 330 . DETAILED DESCRIPTION

[0046] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0047] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0048] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0049] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] The tray assembly 100 according to the embodiment of the utility model is first described in detail below with reference to the drawings.

[0052] like Figures 1 to 7 As shown, the tray assembly 100 according to the embodiment of the present invention includes a tray body 10 and a heating body 20 .

[0053] Specifically, the first side of the tray body 10 is suitable for facing the battery 210, at least part of the first side of the tray body 10 is formed as a thermoplastic body, the heating body 20 is suitable for heating the battery 210, and the heating body 20 is embedded in the thermoplastic body so that the heating body 20 is connected to the tray body 10.

[0054] In other words, if Figures 1 to 7 As shown, the tray assembly 100 according to the embodiment of the utility model mainly includes a tray body 10 and a heating body 20. The tray body 10 may be provided with a receiving groove for accommodating the battery 210. The inner side of the receiving groove may serve as the first side of the tray body 10. The structure of the first side of the tray body 10 includes but is not limited to the following situations:

[0055] Case 1: The first side of the tray body 10 is formed as a thermoplastic body at the location where the heating body 20 is installed, so as to facilitate the installation of the heating body 20;

[0056] Case 2: The entire first side of the tray body 10 is formed as a thermoplastic body, so as to facilitate the installation of the heating body 20 and the arrangement of the heating body 20 .

[0057] When assembling the heating body 20 , the thermoplastic body may be heated to a plastic state and pressurized, and the heating body 20 may be embedded in the thermoplastic body, thereby achieving connection between the heating body 20 and the tray body 10 .

[0058] That is to say, when assembling the heating body 20, the heating body 20 can be integrated on the tray body 10 through the heating and pressurizing process, the assembly efficiency is high, no additional fixing structure is required, and the production cost can be effectively reduced.

[0059] It should be noted that the temperature at which the thermoplastic body changes to a plastic state is about 130° C., and the temperature of the heating body 20 when heating the battery 210 is about 70° C., which will not affect the state of the thermoplastic body when heating the battery 210 .

[0060] Therefore, according to the tray assembly 100 of the embodiment of the utility model, by setting at least a portion of the first side of the tray body 10 as a thermoplastic body, the heating body 20 can be integrated on the tray body 10 by heating and pressurizing, with high assembly efficiency and no need to set a complex fixing structure, thereby simplifying the structure of the battery pack 200 and effectively reducing production costs; and the set thermoplastic body has good insulation properties, and compared with the existing metal tray, it can effectively avoid the short circuit between the battery 210 and the tray body 10; at the same time, the thermoplastic body has good thermal insulation properties, which can effectively avoid the loss of heat from the heating body 20, thereby increasing the heating rate of the heating body 20 to the battery 210.

[0061] In some specific embodiments of the present invention, the tray body 10 is formed as an integrally formed fiber composite insulation member.

[0062] The fiber composite insulation can ensure the structural strength of the tray body 10. Compared with the existing metal pallet, the tray body 10 of this embodiment is an insulator itself and does not need to be insulated on its surface. It also has good anti-corrosion properties, reduces the welding and electrophoresis processes of the battery tray, simplifies the structural design and production process, and has high production efficiency and good consistency. At the same time, the thermoplastic body has a low thermal conductivity and good thermal insulation properties, which can effectively avoid the loss of heat from the heating body 20, thereby increasing the heating rate of the heating body 20 to the battery 210.

[0063] According to an embodiment of the present invention, the pallet body 10 includes: a thermoplastic body and a plurality of fiber layers, the first side of the thermoplastic body is the first side of the pallet body, the plurality of fiber layers are stacked in the thermoplastic body, and the thermoplastic body connects the plurality of fiber layers.

[0064] That is to say, during manufacturing, the thermoplastic body can be processed into a structure suitable for carrying batteries, and the processed thermoplastic body can be used as the tray body 10, so that the first side of the tray body 10 is all thermoplastic, and the heating body 20 can be embedded in the surface of the first side of the tray body 10 by heating and pressurizing.

[0065] Compared with the existing metal pallet, the pallet body 10 of the present embodiment is an insulator itself, and does not need to be insulated on its surface. It also has good anti-corrosion properties, reduces the welding and electrophoresis processes of the battery pallet, simplifies the structural design and production process, and has high production efficiency and good consistency. At the same time, the thermoplastic body has a low thermal conductivity and good thermal insulation properties, which can effectively avoid the loss of heat from the heating body 20, thereby increasing the heating rate of the heating body 20 to the battery 210.

[0066] Furthermore, during manufacturing, multiple fiber layers can be stacked and placed in a mold. Before each fiber layer is stacked, a layer of molten thermoplastic can be coated on its surface. The thermoplastic can be a thermoplastic resin, so that the thermoplastic resin can be fully immersed in the fiber layer. The fiber layer can be processed in the thermoplastic resin, and the thermoplastic can connect the multiple fiber layers together. After the thermoplastic resin is cooled and solidified, the pallet body 10 can be obtained.

[0067] In this embodiment, the fiber layer can effectively improve the structural strength of the tray body 10 , thereby effectively improving the modality of the battery pack 200 .

[0068] In some specific embodiments of the present invention, a plurality of ribs 11 are provided on the first side of the tray body 10 . The ribs 11 are staggered from the heating body 20 . The ribs 11 are suitable for limiting the thickness of the glue between the battery 210 and the first side of the tray body 10 .

[0069] Specifically, if Figure 1 and Figure 2 As shown, a portion of the first side of the tray body 10 is used to carry the battery 210, and a plurality of convex ribs 11 are provided on this portion of the first side of the tray body 10, wherein a portion of the convex ribs 11 can extend along the width direction of the tray body 10 and be arranged along the width direction of the tray body 10, and another portion can extend along the length direction of the tray body 10 and be arranged along the width direction of the tray body 10, and the installation position of the convex rib 11 and the heating body 20 are staggered, so as to avoid the convex rib 11 affecting the heating body 20 in heating the battery 210.

[0070] When the tray assembly 100 according to the embodiment of the utility model holds the battery 210, the battery 210 needs to be fixed, generally by glue bonding, and the glue can be thermally conductive silicone, so as to ensure the uniformity of heating the battery 210 by the heating body 20, and improve the insulation performance between the battery 210 and the tray assembly 100. In this embodiment, the thickness of the glue can be defined by a plurality of convex ribs 11, and when applying the glue, the thickness of the applied glue is not less than the thickness of the convex rib 11, for example, when the thickness of the convex rib 11 is 0.3 mm, the thickness of the glue applied on the first side of the tray body 10 is not less than 0.3 mm.

[0071] When assembling the battery 210, the ribs 11 support the battery 210 so that there is glue of a set thickness between the battery 210 and the tray body 10, thereby ensuring the heating effect of the heating body 20 on the battery 210 and avoiding local overheating of the battery 210 during the heating process.

[0072] According to an embodiment of the present invention, the tray body 10 is provided with a receiving groove suitable for receiving the battery 210 , and at least one dividing rib 12 is provided inside the receiving groove, and the dividing rib 12 divides the receiving groove into a plurality of sub-receiving spaces.

[0073] That is to say, Figure 1 and Figure 2 As shown, a receiving groove suitable for receiving the battery 210 is provided on the upper side of the tray body 10, and the inner side of the receiving groove is the first side of the tray body 10. A dividing rib 12 extending along the width direction of the tray body 10 is provided on the inner side of the receiving groove. The dividing rib 12 can be one or more, and the specific number can be determined according to actual needs. When there are more than one dividing rib 12, the multiple dividing ribs 12 can be spaced apart along the length direction of the tray body 10, so that the receiving groove can be divided into a plurality of sub-receiving spaces, and a heating body 20 can be embedded at the bottom of each sub-receiving space, and the batteries 210 can be respectively received through the multiple sub-receiving spaces.

[0074] In this embodiment, the partition ribs 12 can not only divide the receiving groove into a plurality of sub-receiving spaces suitable for receiving the battery 210 , but also effectively improve the structural strength of the tray body 10 , thereby effectively improving the modality of the battery pack 200 .

[0075] In some specific embodiments of the present invention, the second side of the pallet body 10 is away from the first side of the pallet body 10 , and a plurality of reinforcing ribs 13 are disposed on the second side of the pallet body 10 .

[0076] Specifically, if Figure 1 and Figure 2 As shown, the second side of the pallet body 10 includes the bottom surface of the pallet body 10 and the circumferential wall surface of the pallet body 10. The bottom surface of the pallet body 10 is provided with a plurality of reinforcing ribs 13, wherein a portion of the reinforcing ribs 13 may extend along the length direction of the pallet body 10 and be spaced apart along the width direction of the pallet body 10, and another portion of the reinforcing ribs 13 may extend along the width direction of the pallet body 10 and be spaced apart along the length direction of the pallet body 10, so that the reinforcing ribs 13 form a mesh structure, thereby enabling the pallet body 10 to be reinforced in different directions, and effectively improving the structural strength of the pallet body 10.

[0077] The circumferential wall surface of the pallet body 10 is provided with a plurality of reinforcing ribs 13, wherein a portion of the reinforcing ribs 13 can extend along the circumference of the pallet body 10 to form reinforcing ribs 13 of annular structure and be spaced apart along the height direction of the pallet body 10, and another portion of the reinforcing ribs 13 can extend along the height direction of the pallet body 10 and can be connected as a whole with the reinforcing ribs 13 at the bottom of the pallet body 10.

[0078] Therefore, according to the tray body 10 of the present invention, the structural strength of the tray body 10 can be strengthened in different directions of the tray body 10 through multiple reinforcing ribs 13, which can effectively improve the structural strength of the tray body 10, thereby improving the modality of the battery pack 200.

[0079] According to an embodiment of the present invention, a lifting ear 14 is provided on the outer periphery of the tray body 10 . The lifting ear 14 is suitable for connecting to a vehicle body 300 . The tray assembly 100 further includes a reinforcement member 30 . The reinforcement member 30 is embedded in the lifting ear 14 .

[0080] like Figure 1 and Figure 2 As shown, the outer periphery of the pallet body 10 is provided with a plurality of lifting ears 14, and the plurality of lifting ears 14 can be distributed at intervals along the circumference of the pallet body 10, and the pole ear can be a fiber composite insulating member. During production and manufacturing, the lifting ear 14 can be integrally formed with the pallet body 10 by injection molding, and the reinforcement 30 can be embedded in one side of the lifting ear 14, so as to effectively improve the structural strength of the pole ear. Specifically, the lifting ear 14 is provided with a lifting hole penetrating along the thickness direction thereof, and the reinforcement 30 can be formed into a bushing structure, and the position of the reinforcement 30 corresponds to the position of the lifting hole, thereby effectively improving the structural strength of the lifting ear 14 at the periphery of the lifting hole, thereby effectively improving the reliability of the lifting ear 14.

[0081] In some specific embodiments of the present invention, the pallet assembly 100 further includes: a bottom guard plate 40 , which is suitable for connecting to the vehicle body 300 , and is disposed on the second side of the pallet body 10 , and is connected to the pallet body 10 .

[0082] That is to say, Figure 3 and Figure 4 As shown, the second side of the tray body 10 is connected to a bottom guard plate 40, which is adapted to the tray body 10, so that the bottom guard plate 40 can protect the second side of the tray body 10. The bottom guard plate 40 is a stamped sheet metal part, and the sheet metal thickness can be 1.2mm to 1.5mm, which can effectively strengthen the overall structure of the tray assembly 100 and improve the mode of the battery pack 200. In addition, the bottom guard plate 40 can be connected to the vehicle body 300, such as the longitudinal beam 310 of the vehicle body 300. Under harsh working conditions such as bottoming, the bottom guard plate 40 can transfer most of the external impact force to the vehicle body 300, reducing the impact force on the battery 210, and better protecting the battery 210.

[0083] In this embodiment, the bottom guard plate 40 is connected to the pallet body 10, which can avoid the risk of the bottom guard plate 40 being dented. Moreover, the rib 11 on the second side of the pallet body 10 contacts the bottom guard plate 40, which can effectively reduce the contact area between the bottom guard plate 40 and the pallet body 10, thereby effectively reducing the heat transfer between the bottom guard plate 40 and the pallet body 10, and further improving the thermal insulation effect of the pallet assembly 100.

[0084] According to an embodiment of the present invention, the bottom guard plate 40 is provided with at least one press rib 41 , and the press rib 41 extends along the length direction or the width direction of the bottom guard plate 40 .

[0085] like Figure 3 As shown, the bottom guard plate 40 is provided with a plurality of ribs 41, and the ribs 41 may be ribs 41 extending in the width direction of the bottom guard plate 40 and spaced apart in the length direction of the bottom guard plate 40, or ribs 41 extending in the length direction of the bottom guard plate 40 and spaced apart in the width direction of the bottom guard plate 40. In this embodiment, the ribs 41 can effectively strengthen the overall structure of the tray assembly 100 and improve the modality of the battery pack 200, and the ribs 41 can be formed by stamping, with a simple structure and easy production and manufacturing.

[0086] In some examples of the present invention, a flange is provided on the outer periphery of the bottom guard plate 40, the depth of the flange is 32mm to 38mm, the width is 15mm to 20mm, and the flange extends outward to the outer edge of the pallet body 10, thereby protecting the outer edge of the pallet body 10.

[0087] In some specific embodiments of the present invention, an extension portion 42 is provided on the outer periphery of the bottom guard plate 40 , and the extension portion 42 is matched with the lifting ear 14 , and the extension portion 42 is suitable for being connected to the vehicle body 300 .

[0088] Specifically, if Figure 3 and Figure 5 As shown, the outer periphery of the bottom guard plate 40 is provided with an integrally formed extension part 42, which is adapted to the lifting ear 14 of the pallet body 10. The extension part 42 can be used to strengthen the lifting ear 14 on the side away from the vehicle body 300, which can effectively prevent the lifting ear 14 from breaking. The extension part 42 is also provided with an assembly hole corresponding to the lifting hole. During installation, the steel sleeve 320 can be inserted into the end of the assembly hole away from the vehicle body 300, and then one end of the second connecting member 330 (bolt) is passed through the steel sleeve 320 and the lifting hole and connected to the welding nut 311 on the longitudinal beam 310 of the vehicle body 300.

[0089] Therefore, under harsh working conditions such as crashing, the bottom guard plate 40 can transfer most of the external impact force to the vehicle body 300, reducing the impact force on the battery 210 and better protecting the battery 210.

[0090] According to one embodiment of the utility model, the pallet assembly 100 also includes: at least one first connecting member 50 and at least one fastener 60, the first connecting member 50 is embedded in the second side of the pallet body 10, the first end of the fastener 60 is connected to the first connecting member 50, and the second end of the fastener 60 cooperates with the pallet body 10 to fix the bottom guard plate 40.

[0091] That is to say, Figure 4 As shown, a plurality of first connecting members 50 may be embedded in the second side of the pallet body 10, and the first connecting members 50 may be formed into a nut structure, and the bottom guard plate 40 may be provided with a plurality of through holes penetrating along the thickness direction thereof, and the through holes correspond to the positions of the first connecting members 50. During installation, the bottom guard plate 40 and the pallet body 10 may be connected together by a fastener 60, and specifically, the fastener 60 may be formed into a bolt, and the first end of the bolt may pass through the through hole on the bottom guard plate 40 and be threadedly connected with the first connecting member 50, and after the bolt is tightened, the second end of the bolt may fasten the bottom guard plate 40 to the pallet body 10, and the structure is simple, and it is convenient for production and assembly.

[0092] In some specific embodiments of the present invention, the tray assembly 100 further includes: a fuse, which is electrically connected to the heating body 20 and is embedded in the thermoplastic body.

[0093] Specifically, one end of the heating body 20 is electrically connected to a fuse, and the fuse can also be integrated on the tray body 10 by heating and pressurizing, with high assembly efficiency, without the need to set up a complex fixing structure, and can effectively reduce production costs.

[0094] According to one embodiment of the utility model, the heating body 20 is formed as a heating wire, and the heating body 20 includes a first functional segment 21 and a second functional segment 22, wherein at least part of the flow area of ​​the first functional segment 21 is smaller than the flow area of ​​the second functional segment 22, so that the first functional segment 21 is formed as a safety segment.

[0095] In other words, if Figure 1 , Figure 6 and Figure 7 As shown, the heating body 20 can be formed into a heating wire structure, and the heating wire can be embedded in the first side of the tray body 10 in a serpentine structure. Specifically, the heating wire includes a first functional segment 21 and a second functional segment 22 distributed along its length direction, wherein the structure of the first functional segment 21 includes but is not limited to the following situations:

[0096] Case 1: The flow area of ​​a part or each position of the first functional segment 21 is smaller than the flow area of ​​the second functional segment 22, thereby increasing the resistance of the first functional segment 21, so that the first functional segment 21 is formed into a fuse segment. When the current is large, the first functional segment 21 is fused from the part with a smaller flow area;

[0097] Case 2: The flow area of ​​multiple parts of the first functional segment 21 is smaller than the flow area of ​​the second functional segment 22, thereby increasing the resistance of the first functional segment 21, so that the first functional segment 21 is formed into a fuse segment. This structure facilitates the adjustment of the fuse segment to a suitable resistance value, thereby ensuring the reliability of the fuse segment.

[0098] Optionally, the portion of the first functional segment 21 where the flow area is smaller than the flow area of ​​the second functional segment 22 can be formed by stretching the first functional segment 21 or stamping.

[0099] In this embodiment, the heating wire is integrated with a safety section, which can effectively reduce the cost of components and thus reduce the production cost.

[0100] like Figure 6 and Figure 7 As shown, in some specific embodiments of the present invention, the structure of the heating wire includes but is not limited to the following situations:

[0101] Case 1: The heating wire includes a first functional segment 21 and a second functional segment 22, the first end of the first functional segment 21 forms the first end of the heating wire, the second end of the first functional segment 21 is connected to the first end of the second functional segment 22, and the second end of the second functional segment 22 forms the second end of the heating body 20; in this case, the safety segment is located at the end of the heating wire, which is convenient for production and processing, and easy to adjust the position of the safety segment.

[0102] Case 2: The heating wire includes a first functional segment 21 and two second functional segments 22. The first end of the first second functional segment 22 is formed as the first end of the heating wire, the second end of the first second functional segment 22 is connected to the first end of the first functional segment 21, the second end of the first functional segment 21 is connected to the first end of the second second functional segment 22, and the second end of the second second functional segment 22 is connected to form the second end of the heating body 20, that is, the safety segment is arranged in the middle position of the heating wire.

[0103] According to an embodiment of the present invention, the first functional segment 21 is stretchable so that the resistance value of the first functional segment 21 is adjustable; and / or the second functional segment 22 is stretchable so that the resistance value of the second functional segment 22 is adjustable.

[0104] That is to say, the heating wire can be made of a stretchable material, so that the first functional segment 21 of the heating wire can be stretched. During the stretching process, the first functional segment 21 gradually becomes longer, and its resistance value gradually increases with the length of the first functional segment 21, so that the resistance value of the first functional segment 21 can be adjusted according to demand; the second functional segment 22 of the heating wire can also be stretched. During the stretching process, the second functional segment 22 gradually becomes longer, and its resistance value gradually increases with the length of the second functional segment 22, that is, the flow area gradually decreases, so that the second functional segment 22 can be adjusted to the required resistance value according to demand.

[0105] In some specific embodiments of the present invention, the heating body 20 can be deformed along with the tray body 10 , and the heating body 20 is suitable for being electrically connected to the detection unit of the battery pack 200 .

[0106] Specifically, when the tray body 10 is deformed by force, the heating body 20 is also deformed with the tray body 10, and the resistance of the heating body 20 is also changed. For example, when the tray body 10 is bent by force, the heating body 20 is stretched and its own resistance increases; when the tray body 10 is broken, the heating body 20 is stretched or broken. Therefore, the structural state of the tray body 10, that is, whether the tray body 10 is damaged, can be identified by monitoring the change in the resistance of the heating body 20 through the monitoring unit, so that the user can maintain the battery pack 200 in time.

[0107] In summary, according to the tray assembly 100 of the embodiment of the utility model, by setting at least a portion of the first side of the tray body 10 as a thermoplastic body, the heating body 20 can be integrated on the tray body 10 by heating and pressurizing, with high assembly efficiency and no need to set a complex fixing structure, thereby simplifying the structure of the battery pack 200 and effectively reducing production costs; and the set thermoplastic body has good insulation properties, and compared with the existing metal tray, it can effectively avoid short circuits between the battery 210 and the tray body 10; at the same time, the thermoplastic body has good thermal insulation properties, which can effectively avoid the loss of heat from the heating body 20, thereby increasing the heating rate of the heating body 20 to the battery 210.

[0108] like Figure 8 As shown, the embodiment of the present invention further provides a battery pack 200, including the tray assembly 100 described in any of the above embodiments. Since the tray assembly 100 according to the embodiment of the present invention has the above technical effects, the battery pack 200 according to the embodiment of the present invention also has the above technical effects, which will not be described in detail in this embodiment.

[0109] In some specific embodiments of the present invention, the battery pack 200 further includes: a monitoring unit, which is electrically connected to the heating body 20 , and is suitable for monitoring the resistance of the heating body 20 to identify the structural state of the tray body 10 .

[0110] Specifically, the battery pack 200 is provided with a monitoring unit, which is, for example, but not limited to, a resistance tester. The monitoring unit can be electrically connected to the heating body 20. The resistance of the heating body 20 can be monitored in real time through the monitoring unit, and the structural state of the tray body 10 can be identified based on the change in the resistance of the heating body 20.

[0111] For example, when the tray body 10 is bent or broken by force, the heating body 20 is stretched or broken, and its resistance increases. The monitoring unit can identify the structural state of the tray body 10 according to the change in the resistance of the heating body 20, thereby facilitating the user to maintain the battery pack 200 in a timely manner.

[0112] When in use, the monitoring unit can send the monitoring results to the vehicle, and the vehicle can remind the user through the vehicle dashboard based on the monitoring results.

[0113] like Fig. 9 As shown, the embodiment of the present invention further provides a vehicle, including the battery pack 200 described in any of the above embodiments. Since the battery pack 200 according to the embodiment of the present invention has the above technical effects, the vehicle according to the embodiment of the present invention also has the above technical effects, which will not be described in detail in this embodiment.

[0114] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tray assembly, characterized in that: include: a tray body, a first side of the tray body being adapted to face the battery, at least a portion of the first side of the tray body being formed as a thermoplastic body; A heating body, wherein the heating body is suitable for heating the battery, and the heating body is embedded in the thermoplastic body so that the heating body is connected to the tray body.

2. The tray assembly according to claim 1, characterized in that: The tray body is formed as an integrally formed fiber composite insulation member.

3. The tray assembly according to claim 1, characterized in that: The tray body comprises: a thermoplastic body, wherein a first side of the thermoplastic body is a first side of the tray body; A plurality of fiber layers are stacked in the thermoplastic body, and the thermoplastic body connects the plurality of fiber layers.

4. The tray assembly according to claim 1, characterized in that: A plurality of convex ribs are provided on the first side of the tray body, the convex ribs are staggered from the heating body, and the convex ribs are suitable for defining the thickness of glue between the battery and the first side of the tray body.

5. The tray assembly according to claim 1, characterized in that: The tray body is provided with a receiving groove suitable for receiving batteries, and at least one dividing rib is provided inside the receiving groove, and the dividing rib divides the receiving groove into a plurality of sub-receiving spaces.

6. The tray assembly according to claim 1, characterized in that: The second side of the pallet body is away from the first side of the pallet body, and a plurality of reinforcing ribs are arranged on the second side of the pallet body.

7. The tray assembly according to claim 1, characterized in that: The outer periphery of the tray body is provided with a lifting lug, and the lifting lug is suitable for being connected to the body of a vehicle. The tray assembly further comprises a reinforcing member, and the reinforcing member is embedded in the lifting lug.

8. The tray assembly according to claim 7, characterized in that: Also includes: A bottom guard plate, wherein the bottom guard plate is suitable for being connected to the vehicle body, the bottom guard plate is arranged on the second side of the tray body, and the bottom guard plate is connected to the tray body.

9. The tray assembly according to claim 8, characterized in that: The bottom guard plate is provided with at least one compression rib, and the compression rib extends along the length direction or the width direction of the bottom guard plate.

10. The tray assembly according to claim 8, characterized in that: An extension portion is provided on the outer periphery of the bottom guard plate, the extension portion is matched with the lifting ear, and the extension portion is suitable for being connected to the vehicle body.

11. The tray assembly according to claim 8, characterized in that: Also includes: at least one first connecting member, wherein the first connecting member is embedded in the second side of the tray body; At least one fastener, a first end of the fastener is connected to the first connecting member, and a second end of the fastener cooperates with the tray body to fix the bottom guard plate.

12. The tray assembly according to claim 1, wherein: Also includes: A fuse is electrically connected to the heating body and is embedded in the thermoplastic body.

13. The tray assembly according to claim 1, wherein: The heating body is formed as a heating wire, and the heating body comprises a first functional section and a second functional section, wherein: The flow area of ​​the first functional section is smaller than the flow area of ​​the second functional section, so that the first functional section is formed as a safety section.

14. The tray assembly according to claim 13, characterized in that: The first end of the first functional segment forms the first end of the heating body, the second end of the first functional segment is connected to the first end of the second functional segment, and the second end of the second functional segment forms the second end of the heating body.

15. The tray assembly according to claim 13, wherein: The first functional segment is stretchable so that the resistance value of the first functional segment is adjustable; and / or, The second functional segment is stretchable so that the resistance value of the second functional segment is adjustable.

16. The tray assembly according to claim 1, wherein: The heating body can be deformed along with the tray body, and the heating body is suitable for being electrically connected to a detection unit of a battery pack.

17. A battery pack, characterized in that: A tray assembly comprising the tray assembly of any one of claims 1 to 16.

18. The battery pack according to claim 17, characterized in that: Also includes: A monitoring unit is electrically connected to the heating body, and the monitoring unit is suitable for monitoring the resistance value of the heating body to identify the structural state of the tray body.

19. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 17 or 18.

Images