CN213026344U

CN213026344U - Tray, battery pack and electric automobile

Info

Publication number: CN213026344U
Application number: CN202021836894.5U
Authority: CN
Inventors: 廖正远; 郑卫鑫; 曾毅; 曾而平; 孙泽楠
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-04-20
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a tray, this tray include two at least first crossbeams, at least one first curb girder and at least one second curb girder. The tray that this application disclosed can increase the tray more in a flexible way and bear the quantity of battery module or battery cell to be applied to the battery package of different demands, improve the suitability and the flexibility of tray, reduce the cost of tray die sinking simultaneously. In addition, the tray disclosed in the present application has a lug portion protruding from the receiving space at both ends of the first cross member in the second direction. The anti extrusion ability of tray lug not only can be improved to improve battery tray's structural strength, improve battery tray and to the fixed effect of module, make lug and crossbeam as an organic whole moreover, can reduce battery tray's machining step, thereby reduce machining work load effectively, with the manufacturing cost who reduces battery tray. The utility model also discloses a battery package and electric automobile.

Description

Tray, battery pack and electric automobile

Technical Field

The utility model relates to a battery technology field, in particular to tray, battery package and electric automobile.

Background

The power battery pack is used as an energy storage device and is a core component of hybrid electric vehicles and electric vehicles. The power battery pack mainly comprises a plurality of battery modules, a battery tray and a cover plate. Generally, a battery tray is mounted on the bottom of an automobile, and a cover plate is hermetically connected to the battery tray and collectively forms a closed space for accommodating a battery module. The existing battery tray mainly adopts an extrusion-molded aluminum alloy battery tray or a iron battery tray which is mainly formed by stamping parts and is formed by welding. In order to meet the transportation requirements of the power battery pack, a tray lifting lug is generally welded on the outer side of the tray. However, the structural strength of the power battery pack is greatly influenced by the welding process, and the probability of welding generated welding seams is higher, so that the risk that the tray lifting lug is stressed and falls is higher.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: to the problem that the stability of welding of current tray lug is influenced by welding process easily, provide a tray, battery package and electric automobile.

In order to solve the technical problem, the utility model provides a tray, which is characterized in that the tray comprises at least two first cross beams, at least one first side beam and at least one second side beam; the at least two first cross beams are arranged in a first direction, and two ends of the first side beam and the second side beam in the first direction are respectively connected with two adjacent first cross beams so as to form an accommodating space for accommodating a battery module or a single battery;

the two ends of the first cross beam along the second direction are provided with lifting lug parts protruding out of the accommodating space;

the first direction is perpendicular to the second direction, and the second direction is the extending direction of the first beam.

In one embodiment, one end of the hanging lug part along the lower side of the third direction is provided with a first concave part;

wherein the third direction is perpendicular to both the first direction and the second direction.

In an embodiment, a surface of the first concave portion contacting the first cross beam along the third direction is a first stop surface, a surface of the first concave portion contacting the first cross beam along the second direction is a second stop surface, and a junction of the first stop surface and the second stop surface forms a circle-cut angle of a preset angle.

In an embodiment, the first beam has a first beam body and a second beam body along a third direction, the first beam body and the second beam body are integrally formed, the second beam body has first recesses along two ends along the second direction, the first beam body has a triangular hollow structure inside, and the second beam body has a quadrilateral hollow structure inside.

In one embodiment, the first beam includes a first support portion and a first load bearing portion; one end of the first supporting part along the third direction is connected with one end of the first bearing part along the third direction, and the length of the first bearing part along the first direction is greater than that of the first supporting part along the first direction; the length of the first bearing part along the second direction is smaller than that of the first supporting part along the second direction;

the part of the first supporting part, which protrudes out of the first bearing part along the second direction, is a hanging lug part;

In one embodiment, the first side beams and the second side beams are disposed on the first load-bearing parts, and the first load-bearing parts of two adjacent first cross beams are connected with each other, so that the two adjacent first cross beams, the first side beams and the second side beams enclose a containing space for containing a battery module or a single battery.

In one embodiment, the pallet is further provided with at least one second cross beam, the at least one second cross beam is positioned between two adjacent first cross beams, the second cross beam extends along the second direction, and the second cross beam is arranged on the first load bearing part of the two adjacent first cross beams; one end of the second cross beam in the second direction is connected with the first side beam, and the other end of the second cross beam is connected with the second side beam.

In one embodiment, the second beam comprises a second supporting portion and a second bearing portion, one end of the second supporting portion in the third direction is connected with one end of the second bearing portion in the third direction, and the length of the second bearing portion in the first direction is greater than that of the second supporting portion in the first direction; the length of the second bearing part along the second direction is greater than that of the second supporting part along the second direction;

the length of the first bearing part along the second direction is equal to the length of the second bearing part along the second direction;

the two ends of the second bearing part along the first direction are respectively connected with the first bearing part of the adjacent first cross beam, so that the first cross beam, the first side beam, the second cross beam and the second side beam enclose to form an accommodating space for accommodating a battery module or a single battery.

In a second aspect, the present application provides a battery pack, which includes a plurality of battery modules or single batteries, a cover plate, and the tray; the cover plate is connected with the tray in a sealing mode so as to seal the accommodating space, and the battery module or the single battery is arranged in the closed space.

In a third aspect, the present application provides an electric vehicle, including the above battery pack, the battery pack is installed in the electric vehicle.

According to the utility model discloses a beneficial effect does: the application provides a tray, which comprises at least two first cross beams, at least one first side beam and at least one second side beam; at least two first cross beams are arranged in a first direction, one end of each two adjacent first cross beams in a second direction is connected with the first side beam, and the other end of each two adjacent first cross beams is connected with the second side beam so as to form a containing space for containing a battery module or a single battery in a surrounding manner; the tray is formed through the cooperation of first crossbeam, first side roof beam and second side roof beam, selects through the quantity of first crossbeam, first side roof beam and second side roof beam, can increase the quantity that the tray bore battery module or battery cell more in a flexible way to be applied to the battery package of different demands, improve the suitability and the flexibility of tray, reduce the cost of tray die sinking simultaneously.

In addition, the tray disclosed in the present application has a lug portion protruding from the receiving space at both ends of the first cross member in the second direction. The lifting lug can directly bear the force of the battery module by the structural design. Like this, not only can improve the anti extrusion ability of tray lug to improve battery tray's structural strength, improve battery tray and to the fixed effect of module, make lug and crossbeam as an organic whole moreover, can reduce battery tray's machining step, thereby reduce machining work load effectively, with the manufacturing cost who reduces battery tray.

Drawings

Fig. 1 is a schematic diagram of a battery pack according to an embodiment of the present invention.

Fig. 2 is a schematic view of a tray provided according to an embodiment of the present invention.

Fig. 3 is a schematic view of a first cross member of a pallet according to an embodiment of the present invention.

Fig. 4 is a schematic view of another angle of the first beam provided according to an embodiment of the present invention (with some features omitted).

Fig. 5 is an exploded view of a pallet according to another embodiment of the present invention.

Fig. 6 is a schematic view of a second cross member for providing a tray according to another embodiment of the present invention.

Fig. 7 is an exploded view of a battery pack according to another embodiment of the present invention.

The reference numerals in the specification are as follows:

100. a tray;

110. a first cross member; 111. a first support section; 112. a first bearing part; 113. hanging the lug part; 1131. a first recess; 1132. mounting holes; 114. a first body portion; 115. a first beam body; 116. a second beam body;

120. a first side member;

130. a second side member;

140. a second cross member; 141. a second support portion; 142. a second bearing part; 1411. a second connecting portion;

200. a battery module;

300. a battery pack.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

For convenience of explanation, the present application defines the first direction as a direction in which the first beams 110 are arranged, such as the Y direction in the drawings of the present application. The second direction is defined as a direction in which the first beam 110 extends, such as an X direction in the drawings of the present application. The first direction is perpendicular to the second direction. The present application defines a third direction perpendicular to both the first and second directions, such as the Z direction in the drawings of the present application. The above definitions are for convenience of description only, and other orientation arrangements are within the scope of the present application.

The present application discloses in a first aspect a tray 100. As shown in fig. 1-2, the pallet 100 includes at least two first cross members 110, at least one first side member 120, and at least one second side member 130. At least two first crossbeams 110 are arranged along first direction and are set up, and first side rail 120 and second side rail 130 are located between two adjacent first crossbeams 110 that arrange the setting to two adjacent first crossbeams 110 are all connected with first side rail 120 along the ascending one end in second direction, and the other end all is connected with second side rail 130, and then enclose and close the accommodation space who forms and be used for holding battery module 200 or battery cell. In the embodiment of the present application, for convenience of description, only the battery module 200 is taken as an example for description, and the arrangement and placement of the single batteries are not different from that of the battery module 200, and will not be further described in the embodiment of the present application. Both ends of the first beam 110 in the second direction have a lifting lug part 113 protruding the receiving space, the lifting lug part 113 being used for assembly and transportation of the pallet 100, wherein the lifting lug part 113 is integrally formed with the first beam 110. On the one hand, the tray 100 disclosed in the present application is formed only by the cooperation of the first cross beam 110, the first side beam 120 and the second side beam 130, the tray 100 disclosed in the present application has a simple structure, is easy to assemble, and can be selected by the number of the first cross beam 110, the first side beam 120 and the second side beam 130, the number of the battery modules 200 or the single batteries carried by the tray 100 can be increased more flexibly, so as to be applied to the battery packs 300 with different requirements, the adaptability and the flexibility of the tray 100 are improved, and the cost for opening the tray 100 is reduced. On the other hand, the tray 100 disclosed in the present application is provided with the hanging lug portions 113 at two ends of the first cross member 110 in the second direction, and the hanging lug portions 113 and the first cross member 110 are integrally formed to form a reliable transportation structure of the tray 100. This application makes the lug can directly bear the power of battery module 200 through above-mentioned structural design. Such structural design not only can improve the anti extrusion ability of tray 100 lug to improve battery tray 100's structural strength, improve battery tray 100 and to the fixed effect of module, make lug and crossbeam as an organic whole moreover, can reduce battery tray 100's machining step, thereby reduce machining work load effectively, with the manufacturing cost who reduces battery tray 100.

In the embodiment of the present application, as shown in fig. 2 to 3, one end of the hanging ear portion 113 along the first direction has a first recessed portion 1131, the first recessed portion 1131 is used for cooperating with an external transportation tool to complete transportation of the tray 100, and it is also possible to ensure that the battery pack can be limited and positioned after being mounted on the electric vehicle, that is, when the battery pack is disposed on the electric vehicle, the battery pack can be mounted and positioned according to the first recessed portion in cooperation with a relevant device on the electric vehicle. Still further, a surface of the first recessed portion 1131 contacting the first cross beam 110 along the third direction is a first stop surface, a surface of the first recessed portion 1131 contacting the first cross beam 110 along the second direction is a second stop surface, and a junction of the first stop surface and the second stop surface forms a circle-cut angle with a preset angle. The purpose of the above arrangement is to better ensure the transportation reliability of the tray 100, and ensure the transportation reliability of the tray 100 through the selection of the round cutting angle at the joint. The joint of the first stop surface and the second stop surface is excessive in arc transition, and the degree of a circular tangent angle formed at the joint of the first stop surface and the second stop surface is further limited. Generally, the angle of the circle is set between 120 ° and 150 ° in order to meet the transportation requirements. The first stop surface and the second stop surface are in contact with an external transportation tool, for example, when the external tool is a lifting rope, the lifting rope is sleeved on the first concave part and is in contact with the first stop surface and the second stop surface, so that the battery pack is transported. For example, when the external conveyance is a forklift, the fork clamp on the forklift contacts the first stop surface and the second stop surface to complete the transportation of the battery pack. In addition, the degree of the circle cutting angle formed at the joint of the first stop surface and the second stop surface is limited, so that the stress condition of the lug part is reduced. Specifically, when transport means sets up in first depressed part, with first backstop face and the contact of second backstop face, whole power dispersion is to whole ear of hanging during owing to the setting of first backstop face and second backstop face junction circular arc, owing to the ear of hanging is partly of first crossbeam, consequently the power dispersion that the lug received when realizing transportation or installation is to whole first crossbeam, and then the anti extrusion ability of tray lug to improve battery tray's structural strength, improve the fixed effect of battery tray to the module. And will hang the ear with as a part of first crossbeam, can reduce battery tray's machining step to reduce machining work load effectively, with the manufacturing cost who reduces battery tray.

In the embodiment of the present application, as shown in fig. 3, the first beam 110 includes a first supporting portion 111 and a first load-bearing portion 112, and one end of the first load-bearing portion 112 in the third direction is connected to one end of the first load-bearing portion 112 in the third direction, that is, the first supporting portion 111 is located on the first load-bearing portion 112. In order to meet the requirement of assembling the tray 100, further, the length of the first support part 111 in the first direction is greater than the length of the first support part 111 in the first direction. The first cross member 110 is intended to enable the battery module 200 to be placed on the first load bearing part 112 by the connection of the first load bearing parts 112 of two adjacent first cross members 110, that is, to play a role of supporting by the assembly of the battery modules 200 by the arrangement of the first load bearing parts 112, by setting the length of the first load bearing part 112 in the first direction to be greater than the length of the first support part 111 in the first direction. In order to meet the requirement of transportation of the pallet 100, further, the length of the first bearing part 112 in the second direction is smaller than the length of the first supporting part 111 in the second direction. The purpose of the above arrangement is to reserve the position of the hanging lug part 113 on the first cross member 110. That is, the position where the first supporting part 111 protrudes the first load bearing part 112 in the second direction is a hanging ear part 113 for the assembly and transportation of the tray 100.

In the embodiment of the present application, as shown in fig. 2, the first side beam 120 and the second side beam 130 are disposed on the first load bearing part 112, and specifically, in the second direction, both ends of the first load bearing part 112 of two adjacent first cross beams 110 are respectively connected to the first side beam 120 and the second side beam 130. And the first load bearing parts 112 of two adjacent first cross members 110 are connected to each other so that the two adjacent first cross members 110, the first side member 120 and the second side member 130 enclose a receiving space for receiving the battery module 200 or the unit battery. The two ends of the first side beam 120 and the second side beam 130 along the first direction are respectively connected to two adjacent first cross beams 110 by welding, clamping, or the like, which is further defined herein. Further, the two ends of the first side beam 120 and the second side beam 130 along the first direction are respectively connected with the first supporting portions 111 of two adjacent first cross beams 110, and are connected and located on the first bearing portions 112 of two adjacent first cross beams 110. The tray 100 disclosed in the present application forms a receiving space for receiving the battery module 200 or the unit battery by cooperation of the first and

second side members

120 and 130 using the adjacent two first cross members 110, and can increase the number of the battery modules 200 or the unit batteries carried by the tray 100 according to the number of the first cross members 110, the first side members 120, and the second side members 130. Specifically, in the first direction, as the number of the first cross members 110 is increased, the first side members 120 and the second side members 130 are disposed between each pair of adjacent first cross members 110, thereby increasing the length of the tray 100 and increasing the number of the battery modules 200 or the unit cells carried by the tray 100. The pallet 100 disclosed in the present application not only has convenient adaptability and flexibility, but also can reduce the production cost and the maintenance cost of the pallet 100.

Further, in the embodiment of the present application, as shown in fig. 3, the first supporting portion 111 includes a first body portion 114 and lug portions 113 located at both ends of the first body portion 114 in the second direction, that is, a portion of the first supporting portion 111 protruding out of the first load bearing portion 112 in the second direction is the lug portion 113. The lifting lug portions 113 at the two ends of the first body portion 114 and the first body portion 114 are integrally formed to form the first supporting portion 111. The first body portion 114 is connected to the first bearing portion 112, and a length of the first body portion 114 along the second direction is equal to a length of the first bearing portion 112 along the second direction. Namely, the lifting lug portions 113 at both ends of the first body portion 114 are portions of the first support portion 111 beyond the first load bearing portion 112 in the second direction. The structural diversity is realized through the design, and the first supporting part 111 and the first bearing part 112 can be integrally formed and also can be connected together through welding and other modes. The arrangement of the first support 111 and the first load bearing part 112 makes the entire pallet 100 more flexible in structural design. Specifically, the first bearing parts 112 of two adjacent first cross beams 110 may be the same first bearing part 112, that is, the two first supporting parts 111 are disposed on the same first bearing part 112. Or two adjacent first cross beams 110 may respectively have a separate first bearing part 112, and the battery module 200 is placed by connecting the two first bearing parts 112.

Further, in the embodiment of the present application, as shown in fig. 3, the ear hanging portion 113 on the first beam 110 has a first recessed portion 1131, and the first recessed portion 1131 is located at one end of the ear hanging portion 113 near the first load bearing portion 112 in the third direction. That is, one end of the ear portion 113 on the lower side in the third direction has a first recessed portion 1131. The tray 100 disclosed in the present application realizes the assembly of the tray 100 by the arrangement of the first recessed portion 1131, i.e. the assembly tool fixes the whole tray 100 through the first recessed portion 1131, thereby realizing the transportation of the battery pack 300. Further, in the embodiment of the present application, at one end of the first recessed portion 1131 in the second direction and away from the first body portion 114, the first recessed portion 1131 penetrates through the ear hanging portion 113, that is, a surface of the first recessed portion 1131 contacting the first cross beam 110 in the third direction is a first stop surface, a surface of the first recessed portion 1131 contacting the first cross beam 110 in the second direction is a second stop surface, and a junction of the first stop surface and the second stop surface forms a 120 ° -150 ° circular tangent angle. For example, the first recess 1131 may be a rounded corner with a chamfer angle of 135 degrees, and the bottom of the chamfer angle is a rounded corner larger than R20, and the like, and the specific angle may be adjusted according to actual needs. In another embodiment of the present application, on an end of the first recessed portion 1131 along the second direction and away from the first body portion 114, the first recessed portion 1131 does not extend through the ear portion 113, i.e., the first recessed portion 1131 extends through the entire ear portion 113 only along the first direction. The force applied to the lug part 113 is transmitted to the whole first cross member 110 by the arrangement of the first recessed part 1131, thereby improving the strength of the lug. And the provision of the first recess 1131 further enhances the transportation stability of the tray 100.

Further, in the present embodiment, the hanging ear portion 113 has a mounting portion in the third direction for mounting the tray 100 into the electric vehicle. Specifically, as shown in fig. 3, the hanging ear part 113 further has a mounting hole 1132 penetrating through the hanging ear part 113 in the third direction, and the mounting hole 1132 is provided for the purpose of mounting the tray 100 to the electric vehicle. Specifically, a metal sleeve is welded in the mounting hole 1132, and the lifting lug and the body fixing bolt are connected through the metal sleeve and fix the tray 100 to the electric vehicle body. The mounting holes 1132 provided in the ear portions 113 may also be other types, such as a snap-fit structure. But in order to guarantee the connection reliability and stability between battery package 300 and the electric automobile, this application adopts mounting hole 1132 and bolt complex form to fix battery package 300 to the electric automobile on. The installation hole 1132 is set up to improve the adaptability of the battery pack 300, and the user can adjust the position of the tray 100 according to the requirement and is convenient to detach. Of course, other configurations can also meet the current requirements, and the present application is not further limited thereto.

In another embodiment of the present application, in order to further divide the battery module 200 placement space with respect to the accommodation space in the tray 100, as shown in fig. 5 to 7, the tray 100 disclosed in the present application is further provided with at least one second cross member 140, and the at least one second cross member 140 is disposed between two adjacent first cross members 110 and on the first load-bearing portions 112 of the two adjacent first cross members 110. Wherein, one end of the second beam 140 along the second direction is connected to the first side beam 120, and the other end is connected to the second side beam 130. The second cross member 140 is provided to divide an accommodating space for accommodating the battery module 200 or the single battery, which is defined by two adjacent first cross members 110, the first side member 120, and the second side member 130, so that a plurality of battery modules 200 can be accommodated in one accommodating space, and the battery modules 200 do not collide with each other.

Further, in an embodiment, as shown in fig. 7, the second beam 140 includes a second supporting portion 141 and a second bearing portion 142, and one end of the second supporting portion 141 along the third direction is connected to one end of the second bearing portion 142 along the third direction. The length of the second supporting portion 141 in the first direction is greater than the length of the second supporting portion 142 in the first direction; the length of the second load bearing part 142 in the second direction is greater than the length of the second support part 141 in the second direction. The length of the first bearing part 112 in the second direction is equal to the length of the second bearing part 142 in the second direction; the two ends of the second bearing portion 142 along the first direction are respectively connected to the first bearing portions 112 of the adjacent first cross beams 110, so that the first cross beams 110, the first side beams 120, the second cross beams 140 and the second side beams 130 enclose a containing space for containing the battery module 200 or the single battery. In another embodiment, if one first load-bearing part 112 is shared between two adjacent first cross beams 110, the second cross beam 140 only has a second supporting part 141, and the second supporting part 141 is disposed on the first load-bearing part 112 to divide the overall accommodating space into a plurality of small accommodating spaces, so as to meet the requirement of carrying a plurality of battery modules 200. The structure that the tray 100 disclosed in this application made the tray 100 through setting up of second crossbeam 140 is more diversified, and the user can adjust the number of first crossbeam 110 and second crossbeam 140 according to the demand to the number of adjusting tray 100 and bearing battery module 200 has further improved the adaptability and the flexibility of tray 100 disclosed in this application and has further reduced the manufacturing cost and the maintenance cost of tray 100.

Still further, as shown in fig. 7, the second beam 140 further has second connection portions 1411, and the second connection portions 1411 are located at two ends of the second support portion 141 of the second beam 140 along the second direction. The second connection portion 1411 is used to connect the first side beam 120 and the second side beam 130, and the connection form is not limited to welding and clamping, and is not further limited herein.

Still further, as shown in fig. 4 and 6, the pallet 100 disclosed herein has a lightweight design. Specifically, the first cross member 110, the first side member 120, the second cross member 140, and the second side member 130 all have hollow structures inside. In order to meet the strength requirement, hollow structures inside the first cross beam 110, the first side beam 120, the second cross beam 140 and the second side beam 130 are provided with reinforcing ribs, and the reinforcing ribs are in triangular structures and rectangular structures. Further, the first beam 110 has a first beam 115 and a second beam 116 along the third direction, the first beam 115 and the second beam 116 are integrally formed, the second beam 116 has first recesses 1131 along two ends of the second direction, the first beam 115 has a triangular hollow structure inside, and the second beam 116 has a quadrilateral hollow structure inside. Specifically, in the second direction along the whole first beam 110, the first beam 110 higher than the horizontal position of the first recess 1131 is the first beam body 115; the first beam 110 at the same horizontal position as the first recess 1131 and the first beam 110 lower than the horizontal position of the first recess 1131 are the second beam 116. Still further, the reinforcing ribs of the hollow structures inside the first beam body 115, the first side beam 120, the second side beam 130 of the first cross beam 110 and the second supporting portion 141 of the second cross beam 140 are triangular structures, and the reinforcing ribs of the hollow structures inside the second beam body 116 of the first cross beam 110 and the second supporting portion 142 of the second cross beam 140 are rectangular structures. The purpose of the present invention is to adopt different forms of reinforcement structures according to different requirements for strength at different positions to meet actual requirements, and specifically, since the first support portion 111 of the first cross member 110, the first side member 120, the second side member 130, and the second support portion 141 of the second cross member 140 mainly function as a frame enclosing a space for accommodating the battery module 200 or the battery cell and are used for the overall transportation of the battery pack 300, the reinforcement rib structure adopted inside the first cross member 110 adopts a triangular structure with higher stability, and the first bearing portion 112 of the first cross member 110 and the second bearing portion 142 of the second cross member 140 are mainly used for bearing the battery module 200 or the battery cell, and therefore, the reinforcement rib inside the first cross member adopts a rectangular structure with general stability. The above-mentioned ribs are provided only to satisfy the strength requirement of the tray 100, and other forms of rib structures can be applied to the tray 100 disclosed in the present application, and are not further limited herein. For the strength of the whole tray 100, the first cross member 110, the first side member 120, the second side member 130 and the second cross member 140 are all made of metal, so the cost of the whole battery tray 100 can be further reduced and the strength of the tray 100 can be improved due to the hollow structure.

Still further, in order to satisfy the fixation of the battery module 200, as shown in fig. 3 and 7, the first cross member 110 and the second cross member 140 are further provided with battery module 200 fixing holes, and specifically, the battery module 200 fixing holes are provided in the first supporting portion 111 of the first cross member 110 and the second supporting portion 141 of the second cross member 140. The number of the fixing holes of the battery module 200 may be adjusted according to actual needs.

A second aspect of the present application discloses a battery pack 300, as shown in fig. 1 and 5, the battery pack 300 includes a plurality of battery modules 200 or unit batteries and the tray 100 described above. Generally, the battery pack 300 further includes a cover plate hermetically connected to the tray 100 to enclose the accommodating space for accommodating the battery module 200 and the unit batteries, which are described above, to form a sealed space. A plurality of battery modules 200 or unit batteries are disposed in the sealed space.

In a third aspect of the present application, an electric vehicle is disclosed, which includes the battery pack 300 described above. Wherein the battery pack 300 is fixed to the body of the electric vehicle through the mounting holes 1132 of the lug parts 113. The fixing manner may be bolt fixing, and the like, and is not further limited herein.

In the description of the present invention, it is to 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", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A pallet, comprising at least two first cross members, at least one first side member, and at least one second side member; the at least two first cross beams are arranged in a first direction, and two ends of the first side beam and the second side beam in the first direction are respectively connected with two adjacent first cross beams so as to form an accommodating space for accommodating a battery module or a single battery;

2. The tray according to claim 1, wherein the lug part has a first recess portion at one end of the third direction lower side;

3. A tray according to claim 2, wherein the surface of the first recessed portion contacting the first cross member in the third direction is a first stop surface, the surface of the first recessed portion contacting the first cross member in the second direction is a second stop surface, and the junction of the first stop surface and the second stop surface forms a predetermined angle of a circle-cut angle.

4. The tray according to claim 2, wherein the first beam has a first beam body and a second beam body along a third direction, the first beam body and the second beam body are integrally formed, the second beam body has first recesses along two ends along a second direction, the first beam body has a triangular hollow structure inside, and the second beam body has a quadrilateral hollow structure inside.

5. The pallet of claim 1, wherein the first beam comprises a first support and a first load bearing portion; one end of the first supporting part along the third direction is connected with one end of the first bearing part along the third direction, and the length of the first bearing part along the first direction is greater than that of the first supporting part along the first direction; the length of the first bearing part along the second direction is smaller than that of the first supporting part along the second direction;

6. The tray according to claim 5, wherein the first side members and the second side members are disposed on the first load bearing parts, and the first load bearing parts of adjacent two first cross members are connected to each other such that the adjacent two first cross members, the first side members and the second side members enclose a receiving space for receiving a battery module or a unit cell.

7. The pallet according to claim 6, wherein at least one second cross member is further provided, the at least one second cross member being located between two adjacent first cross members, the second cross member extending in the second direction, the second cross member being provided on the first load bearing portion of the two adjacent first cross members; one end of the second cross beam in the second direction is connected with the first side beam, and the other end of the second cross beam is connected with the second side beam.

8. The tray of claim 7, wherein the second beam includes a second support portion and a second load-bearing portion, one end of the second support portion along the third direction is connected to one end of the second load-bearing portion along the third direction, and the length of the second load-bearing portion along the first direction is greater than the length of the second support portion along the first direction; the length of the second bearing part along the second direction is greater than that of the second supporting part along the second direction;

9. A battery pack comprising a plurality of battery modules or unit batteries, a cover plate, and the tray of any one of claims 1 to 8; the cover plate is connected with the tray in a sealing mode, so that the accommodating space is sealed to form a sealed space, and the battery module or the single battery is arranged in the sealed space.

10. An electric vehicle comprising the battery pack of claim 9, wherein the battery pack is installed in the electric vehicle.