CN107293663B

CN107293663B - Automobile tray assembly for mounting power battery and automobile

Info

Publication number: CN107293663B
Application number: CN201610224142.5A
Authority: CN
Inventors: 彭青波; 鲁志佩; 卢甲; 郑卫鑫; 朱燕; 朱建华
Original assignee: BYD Co Ltd
Current assignee: Chongqing Fudi Battery Research Institute Co ltd
Priority date: 2016-04-11
Filing date: 2016-04-11
Publication date: 2020-11-20
Anticipated expiration: 2036-04-11
Also published as: CN107293663A

Abstract

The invention provides a vehicle tray assembly for mounting a power battery, which comprises a tray bottom plate and mounting cross beams arranged on the periphery of the tray bottom plate, wherein the tray bottom plate comprises at least one sub-bottom plate, and the sub-bottom plate comprises an upper plate body, a lower plate body and a buffer cavity arranged between the upper plate body and the lower plate body; and the lower surface of the tray bottom plate is provided with radiating fins. According to the tray assembly for mounting the power battery, provided by the invention, in the driving process of an automobile, when impact occurs, the buffer cavity can play a good buffer role, so that the influence of the impact on the power battery is reduced, and the use safety of the power battery is improved; meanwhile, a flow channel or other parts can be arranged in the buffer cavity, so that the safety performance is improved, and the space is saved to a certain extent. In addition, due to the arrangement of the radiating fins, heat transferred by the tray bottom plate can be well dissipated in an air cooling mode in the running process of the automobile.

Description

Automobile tray assembly for mounting power battery and automobile

Technical Field

The invention relates to the field of automobile parts, in particular to an automobile tray assembly for mounting a power battery.

Background

With the continuous development of new energy automobiles, the requirements on the installation and safety performance of power batteries in the new energy automobiles are higher and higher; especially, how to install the power battery on the automobile, and simultaneously, the safety performance of the power battery in the using process and the response to some special problems can be considered, which is a difficult problem of hindering the development of new energy automobiles.

In new energy vehicles, a common method currently adopted is to mount a power battery (module or module) on a vehicle tray; the space is saved, the weight of the power battery can be concentrated at the bottom of the automobile, and the stability of the automobile is improved; meanwhile, the bottom of the tray can be cooled by natural wind in the running process of the automobile through the exposed characteristic of the bottom of the tray, and therefore the power battery arranged on the tray is cooled.

In the prior art, as shown in fig. 1, a conventional steel tray is used; the power battery tray comprises a mounting beam 20 and a tray bottom plate 10, wherein a mounting structure is arranged on the tray bottom plate 10, and the power battery is mounted on the tray bottom plate 10 through the mounting structure; the mounting cross member 20 is provided with a mounting portion 60, and the steel pallet is fixed to the automobile through the mounting portion 60. During the use process of the automobile, the tray bottom plate 10 is generally arranged at the bottommost part of the automobile and is similar to the function of an automobile chassis; in the driving process, collision is inevitable; and conventional steel tray is the individual layer structure, when receiving the striking, does not have the function of buffering, damages the battery easily, leads to battery thermal runaway to take place even to catch fire, threatens driver's life safety. In addition, the strength and the rigidity of the conventional steel pallet are insufficient, and the long-time vibration requirement of the conventional steel pallet installed on an automobile is difficult to meet. In addition, the steel tray is heavy, which is not favorable for the requirement of light weight in new energy automobiles. In addition, due to the limitation of the material and the strength of the steel tray, the edge of the steel tray needs to be designed with a bevel edge in the process of manufacturing the steel tray, so that the occupied space is large, and the arrangement of the internal power battery is not facilitated.

Disclosure of Invention

The invention aims to solve at least one technical problem to a certain extent, and provides a vehicle tray assembly and a vehicle, wherein the vehicle tray assembly can provide a buffering effect when an impact occurs, and is small in occupied space and high in safety performance and used for mounting a power battery.

Therefore, the invention provides a vehicle tray assembly for mounting a power battery, which comprises a tray bottom plate and mounting cross beams arranged on the periphery of the tray bottom plate, wherein the tray bottom plate comprises at least one sub-bottom plate, and the sub-bottom plate comprises an upper plate body, a lower plate body and a buffer cavity arranged between the upper plate body and the lower plate body; and the lower surface of the tray bottom plate is provided with radiating fins.

The invention provides a vehicle tray assembly for mounting a power battery, wherein at least one sub-bottom plate in a tray bottom plate comprises an upper plate body, a lower plate body and a buffer cavity arranged between the upper plate body and the lower plate body; in the driving process of the automobile, when impact occurs, the buffer cavity can play a good role in buffering, the influence of the impact on the power battery is reduced, and the use safety of the power battery is improved; meanwhile, a flow channel or other parts can be arranged in the buffer cavity, so that the safety performance is improved, and the space is saved to a certain extent. In addition, due to the arrangement of the radiating fins, heat transferred by the tray bottom plate can be well dissipated in an air cooling mode in the running process of the automobile.

In some examples, a cooling duct is disposed within the buffer cavity.

In some embodiments, the subfloor is an integrally extruded aluminum floor.

In some embodiments, the tray floor is formed by combining at least two sub-floors.

Preferably, the two adjacent sub-bottom plates are connected by welding.

In some embodiments, the cushion chamber extends along a width of the vehicle tray assembly.

In some embodiments, the mounting beam is internally provided with a hollow portion extending in a length direction of the mounting beam.

In some embodiments, the mounting cross beam is provided with an outlet, and an outlet of a power battery arranged on the vehicle tray assembly and/or a cooling pipeline arranged on the vehicle tray assembly are laid in the hollow part and led out of the vehicle tray assembly through the outlet.

In some embodiments, the mounting beam is internally provided with a reinforcing rib extending along the length direction of the mounting beam, and the reinforcing rib divides the hollow part into at least two sub-hollow parts.

In some embodiments, at least one of the sub-hollows is used for laying an outlet wire mounted on the tray assembly for a vehicle.

Preferably, at least one of the sub-hollows is used for laying a cooling duct mounted on the tray assembly for the vehicle.

Preferably, the at least one subsubhollow portion is a cooling subsubhollow portion as a cooling channel.

Preferably, the cross-sectional area of the cooling subsubhollow portion is smaller than the cross-sectional area of the other subsubhollow portions.

In some embodiments, the mounting beam is an integrally extruded aluminum beam.

In some embodiments, at least one vertical partition perpendicular to the upper plate body or the lower plate body is arranged between the upper plate body and the lower plate body, and the buffer cavity is divided into at least two sub-cavities by the partition.

Preferably, the buffer cavity extends along the width direction of the tray assembly for the vehicle, and the buffer cavity is divided into at least two sub-cavities by a partition extending along the width direction of the tray assembly for the vehicle.

Preferably, a cooling duct is provided within at least one of the sub-cavities.

Preferably, at least one of the sub-cavities is a cooling sub-cavity serving as a cooling channel.

Further, the cross-sectional area of the cooling sub-cavity is smaller than the cross-sectional areas of the other sub-cavities.

In some embodiments, the tray bottom plate is provided with a battery mounting structure for mounting a power battery.

In some embodiments, the sub-base plates are arranged along the length direction of the tray assembly for the vehicle; the buffer cavity extends along the width direction of the tray component for the vehicle.

In some embodiments, a phase change material is disposed within the buffer cavity.

In some embodiments, a phase change material is disposed within the cooling subcavity.

In some examples, the power battery packaging structure further comprises a packaging cover, and the packaging cover, the tray bottom plate and the mounting cross beam form a mounting space for mounting the power battery.

In some embodiments, the lower surface of at least one of the sub-base plates is provided with heat dissipation fins.

In some embodiments, the heat dissipation fins are a plurality of sheets extending along the length direction of the vehicular tray assembly.

In some embodiments, the sub-bottom plate includes at least two sub-bottom plates, each sub-bottom plate is provided with a plurality of sheets extending along the length direction of the vehicle tray assembly, and the plurality of sheets on different sub-bottom plates are located on the same straight line in a one-to-one correspondence manner.

Preferably, the heat dissipation fins are integrally formed with the tray bottom plate or the sub-bottom plate.

The invention also provides an automobile which comprises the automobile tray component and the power battery arranged on the automobile tray component, wherein the automobile tray component is used for mounting the power battery.

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.

Drawings

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

fig. 1 is a schematic structural view of a tray assembly for a vehicle in the related art.

Fig. 2 is a schematic structural diagram of a vehicle tray assembly according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a vehicle tray assembly along a length direction according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a cross-sectional view of a combination of a tray floor and a mounting beam according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a vehicle tray assembly including heat dissipating fins according to an embodiment of the present invention.

Fig. 7 is an enlarged schematic view of part B in fig. 6.

FIG. 8 is a schematic cross-sectional view of a subfloor including cooling ducts according to one embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view of a sub-floor of a sub-cavity as a cooling channel according to an embodiment of the present invention.

Fig. 10 is a cross-sectional view of a tray floor in combination with a mounting beam according to another embodiment of the present invention.

Reference numerals

A tray bottom plate 10; a sub-chassis 11; an upper plate body 111; a lower plate body 112; a buffer chamber 113; the spacer 114; the sub-cavity 1131; a cooling subcavity 1132; cooling conduit 1133; mounting the cross beam 20; a hollow portion 21; the sub hollow portion 211; the cooling sub hollow portion 212; a diversion hole 22; a reinforcing rib 23; a battery mounting structure 30; a phase change material 40; heat dissipating fins 50; an air duct 501; a mounting portion 60.

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 or similar 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 illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following describes a tray assembly for mounting a power battery according to the present invention with reference to fig. 2 to 10.

As shown in fig. 2 to 4, the present invention provides a vehicle tray assembly for mounting a power battery, including a tray base plate 10 and mounting cross beams 20 disposed around the tray base plate 10, wherein the tray base plate 10 includes at least one sub-base plate 11, and the sub-base plate 11 includes an upper plate 111, a lower plate 112 and a buffer cavity 113 disposed between the upper plate 111 and the lower plate 112.

For example, the tray assembly for the vehicle, which is commonly used in the field, is generally rectangular; a rectangular tray bottom plate 10 and four mounting cross beams 20 arranged around the tray bottom plate 10. The mounting beam 20 can be integrated with the tray bottom plate 10; or a split structure, four mounting cross beams 20 are manufactured around the tray bottom plate 10 by welding or other processes.

The mounting cross member 20 is generally a one-piece structure, the direction of the long side of the rectangle is generally considered to be the length direction of the pallet base 10 or the vehicle pallet assembly, and the direction of the short side of the rectangle is generally considered to be the width direction of the pallet base 10 or the vehicle pallet assembly. As shown in fig. 3 or 4, the left-right direction is a longitudinal direction, and the up-down direction is a thickness direction, which is a thickness direction of the tray floor 10 or the tray assembly for a vehicle. For the description of the automobile, in general, the length direction of the tray bottom plate 10 is the same as the driving direction of the automobile; the width direction of the tray bottom plate 10 corresponds to the body width direction of the automobile.

In the present invention, the tray base 10 includes at least one sub-base 11, and the sub-base 11 includes an upper plate 111, a lower plate 112, and a buffer cavity 113 disposed between the upper plate 111 and the lower plate 112. As shown in fig. 4, the upper plate 111 and the lower plate 112 are both perpendicular to the thickness direction, and generally, two plates parallel to each other are selected as the upper plate 111 and the lower plate 112, and the plane of the upper plate 111 and the plane of the lower plate 112 are the same as the plane of the pallet base plate 10.

As shown in fig. 4, the buffer cavity 113 is a flat cavity generally parallel to the upper plate 111 or the lower plate 112. In some embodiments of the present invention, the upper plate 111, the lower plate 112 and the buffer cavity 113 are integrally formed by a metal plate (e.g., aluminum); more specifically, the buffer cavity 113 may be stamped and formed from the middle of a solid aluminum plate.

In the invention, the buffer cavity 113 exists, and when the vehicle tray assembly is impacted in the using process, the buffer cavity 113 can provide a certain buffer space; the lower plate body 112 is sunken upwards due to impact, a certain buffer space is provided, the power battery arranged in the automobile tray assembly can be well protected, and the impact is prevented from affecting the safety performance of the power battery. Meanwhile, various energy-absorbing materials, such as the phase-change material 40, can also be arranged in the buffer cavity 113; or the cooling pipeline 1133 is arranged in the buffer cavity 113 or the buffer cavity 113 is used as a cooling channel of a cooling medium, so that the space occupied by the arrangement of the cooling pipeline 1133 on the inner surface of the tray component for the vehicle can be saved; meanwhile, the safety performance of the power battery can be improved to a certain extent.

In some embodiments of the present invention, the lower surface of the tray bottom plate 10 is provided with heat dissipation fins 50.

As shown in fig. 6 and 7, in the present invention, heat radiating fins 50 are provided on the lower surface of the tray bottom plate 10. Because the lower surface of the tray bottom plate 10 is exposed at the bottom of the automobile, airflow is formed at the bottom in the driving process of the automobile, and the tray bottom plate 10 can be well cooled through air cooling.

In some embodiments of the present invention, the lower surface of at least one sub-base plate 11 is provided with heat dissipation fins 50. On one hand, the heat generated by the power battery arranged on the sub-base plate 11 can be well dissipated through the combination of the heat dissipation fins 50 and the sub-base plate 11; on the other hand, the heat dissipation fins 50 are more convenient to process and manufacture.

In some embodiments, the heat dissipating fins 50 are a plurality of sheets extending along the length of the vehicle tray assembly. The length direction of the tray assembly for the vehicle corresponds to the driving direction of the vehicle. By arranging the heat dissipating fins 50 in this manner, the air grooves 501 through which the air flows can be formed between the adjacent heat dissipating fins 50, so that the contact area between the natural air and the heat dissipating fins 50 is increased, and the heat dissipation is accelerated.

According to the above tray bottom plate 10, the sub bottom plate 11 comprises at least two sub bottom plates, each sub bottom plate 11 is provided with a plurality of sheet-shaped bodies extending along the length direction of the vehicle tray assembly, and the plurality of sheet-shaped bodies on different sub bottom plates 11 are correspondingly positioned on the same straight line one by one. As shown in fig. 6 and 7, the plurality of heat dissipation fins 50 on the sub-base plate 11 are all provided, and the heat dissipation fins 50 on different sub-base plates 11 are located on the same straight line; therefore, the blocking of the airflow caused by the irregular radiating fins 50 can be reduced as much as possible, so that the problems of unsmooth airflow and poor radiating effect caused by blocking are avoided.

In some embodiments of the present invention, the heat dissipating fins 50 are integrally formed with the tray bottom plate 10 or the sub-bottom plate 11. As shown in fig. 7, the heat dissipation fins 50 are integrally formed on each sub-base plate 11, when the plurality of sub-base plates 11 are assembled, the heat dissipation fins 50 on different sub-base plates 11 jointly form a heat dissipation fin 50 group located on the lower surface of the tray base plate 10, and the air channel 501 formed between two adjacent heat dissipation fins 50 on each sub-base plate 11 is identical to that on the other sub-base plates 11.

In other embodiments of the present invention, as shown in fig. 9, the buffer chamber 113 comprises a vacuum chamber.

Set up the vacuum cavity in buffer cavity 113, can keep apart power battery inside temperature and ambient temperature, reduce extreme environment to the power battery's of setting in automobile-used tray subassembly influence.

The buffer cavities 113 may be all vacuum cavities, or a part of the buffer cavities 113 may be vacuum cavities. Of course, in order to effectively isolate the temperature inside the vehicle tray assembly from the external ambient temperature, it is most preferable to form all of the buffer chambers 113 as vacuum chambers.

In the present invention, the buffer cavity 113 is divided into at least two sub-cavities 1131 by the isolation portion 114, wherein at least one sub-cavity 1131 is a vacuum cavity. Of course, based on the above description, all of the sub-cavities 1131 can be made as vacuum cavities to facilitate better temperature isolation. In general, the tray base 10 may include a plurality of sub-bases 11, each sub-base 11 includes a buffer cavity 113, and the buffer cavity 113 of each sub-base 11 may be divided into at least two word cavities 1131; in either case, all of the buffer chambers 113 may be vacuum chambers.

In different driving environments, such as cold places, the charging and discharging performance of the power battery can be influenced due to low temperature; when the power battery is used in a cold environment, the power battery generally needs to be heated properly to improve the overall performance of the power battery. At the moment, the temperature in the environment is low, and if the heat insulation treatment between the power battery and the environment is not carried out, the use of the power battery is very unfavorable; therefore, in the invention, the buffer cavity 113 is arranged on the tray bottom plate 10, so that on one hand, a buffer function is provided for impact, and the safety performance of the power battery in the impact process is ensured; on the other hand, the buffer cavity 113 may be partially or entirely a vacuum cavity, so as to isolate the interior of the vehicle tray assembly from the external environment, reduce the adverse effect of the external low-temperature environment on the power battery, and improve the service performance of the power battery.

In some embodiments of the present invention, as shown in fig. 8, a cooling conduit 1133 may be disposed inside the buffer cavity 113. On one hand, one surface of the cooling pipe 1133 is attached to the upper plate 111, and can perform heat conduction with the power battery arranged on the upper plate 111 well; on the other hand, the other surface of the cooling duct 1133 is bonded to the lower plate 112, and heat in the cooling duct 1133 can be dissipated by natural wind heat dissipation from the bottom of the tray.

The cooling duct 1133 may have a curved shape integrally laid in the buffer cavity 113, and the cooling medium is introduced from one end of the cooling duct 1133 and is led out from the other end to form a cooling circulation duct. The cooling channel 1133 may also be made into a straight tube, and the straight tube is preferably arranged along the width direction of the vehicle tray, so that two ends of the cooling channel 1133 can be led out along the edge of the mounting beam 20; further, a hollow portion 21 may be provided inside the mounting beam 20, and an introduction port and an extraction port may be provided, and the cooling duct 1133 provided in the buffer chamber 113 may enter the hollow portion 21 from the introduction port, and be extracted to the outside via the extraction port of the hollow portion 21.

As described above, the sub-chassis 11 may be an integrally extruded aluminum chassis. The aluminum bottom plate can be easily made into a hollow structure due to the characteristics of the aluminum bottom plate; namely, the sub-base plate 11 provided by the invention and internally provided with the buffer cavity 113.

In some embodiments of the present invention, the tray bottom 10 is formed by combining at least two sub-bottom plates 11 if the tray bottom 10 is large, considering the size of the tray bottom 10. Thus, at least two sub-bottom plates 11 can be arranged side by side and connected to each other to form a whole pallet bottom plate 10. Generally, at least two sub-bottom plates 11 are arranged and combined along the length direction of the tray bottom plate 10 to form the tray bottom plate 10; in this way, the larger tray base plate 10 can be divided into a plurality of smaller sub-base plates 11, so as to facilitate the fabrication of the buffer cavities 113 on the sub-base plates 11.

Preferably, two adjacent sub-bottom plates 11 are connected together by welding. The robustness of the weld and the aesthetics of the resulting tray floor 10 are considered.

In some embodiments of the present invention, the buffer cavity 113 extends along the width of the vehicle tray assembly. Namely, the buffer cavities 113 are arranged in the width direction of the tray bottom plate 10, so that the arrangement of the buffer cavities 113 can be more convenient on one hand, and the filling of the flow channels and other materials can be more convenient on the other hand.

In some embodiments of the present invention, as shown in fig. 5, the interior of the mounting beam 20 is provided with a hollow 21 extending along the length of the mounting beam 20. The hollow portion 21 is used for routing the power battery or leading out the cooling pipe 1133. If the installation beam 20 is installed in the length direction of the tray assembly, the length direction of the installation beam 20 is the length direction of the tray assembly; in the case of the mounting cross member 20 mounted in the width direction of the tray assembly, the length direction of the mounting cross member 20 is the width direction of the tray assembly.

In other embodiments of the present invention, the mounting cross member 20 is provided with an outlet (not shown), and the outlet of the power battery disposed on the vehicle tray assembly and/or the cooling duct 1133 disposed on the vehicle tray assembly are laid in the hollow portion 21 and led out of the vehicle tray assembly through the outlet. The outgoing lines or the cooling pipelines 1133 are led out through the hollow part 21 on the mounting beam 20, so that the space occupation in the vehicle tray assembly is saved, and the outgoing lines or the cooling pipelines 1133 can be led out more regularly; avoided in traditional automobile-used tray subassembly, the interior lead-out wire is arranged in a jumble, has reduced because the short circuit risk that causes is arranged in a jumble.

In the present invention, the mounting beam 20 is provided with a rib 23 extending along the longitudinal direction of the mounting beam 20, and the rib 23 divides the hollow portion 21 into at least two sub-hollow portions 211. The hollow portion 21 is divided into at least two parts, i.e., two sub-hollow portions 211, by one or more reinforcing ribs 23; thus, on one hand, the strength of the mounting beam 20 can be increased through the reinforcing ribs 23; on the other hand, the leading-out wires or the cooling pipelines 1133 can be led out in order, and even the leading-out wires and the cooling pipelines 1133 can be led out through two different sub hollow parts 211 respectively.

In some embodiments, one of the at least two sub-hollow portions 211 is used for laying lead-out wires mounted on the tray assembly for the vehicle. That is, one of the sub-hollow portions 211 is used for routing the outgoing line.

In other embodiments, at least one of the sub-hollows 211 is used to house a cooling duct 1133 mounted on the vehicle tray assembly. In the present invention, the lead-out wire or the cooling pipe 1133 may be alternatively led out through one of the sub hollow portions 211, may be led out from one sub hollow portion 211 at the same time, or may be disposed in different sub hollow portions 211.

Further, in some embodiments of the present invention, one of the sub-hollow portions 211 may be referred to as a cooling passage, which is called a cooling sub-hollow portion 212. That is, the sub-hollow portion 211 itself serves as a cooling passage into which a cooling medium is directly introduced without providing a cooling pipe 1133 therein.

When one of the sub-hollow portions 211 is used as the cooling sub-hollow portion 212, the cross-sectional area of the cooling sub-hollow portion 212 may be made smaller than the cross-sectional areas of the other sub-hollow portions 211. The cross-sectional area refers to the area of the cross-section as shown in fig. 10, i.e., the area of the cross-section taken on a plane perpendicular to the width direction of the tray bottom 10. Therefore, the space inside the mounting cross beam 20 can be more reasonably utilized, a larger cross section is reserved at the position where wiring and large space are needed, and a smaller cross section is reserved in the flow channel of the cooling medium.

In one preferred form of the invention, the mounting beam 20 may be an integrally extruded aluminum beam. As mentioned above, the design comprehensively considers the plasticity of the aluminum beam and the selection of the manufacturing process.

In some embodiments of the present invention, and more particularly, to facilitate the design and installation of the mounting beam 20, it is preferred that the mounting beam 20 be square.

In other embodiments, the square mounting beam 20 is disposed perpendicular to the tray floor 10, which further facilitates the secure connection between the mounting beam 20 and the tray floor 10.

More specifically, in some embodiments, the hollow 21 within the mounting beam 20 is a square hollow 21, and the square hollow 21 runs through the entire length of the mounting beam 20.

In some embodiments of the present invention, as shown in fig. 5, the reinforcing rib 23 inside the mounting beam 20 is a sloping plate disposed along one corner of the square hollow portion 21, and the reinforcing rib 23 divides the square hollow portion 21 into two parts, one is a triangular cross-section sub-hollow portion 211 and the other is a trapezoidal cross-section sub-hollow portion 211. The reinforcing ribs 23 designed in this way can better improve the overall strength of the mounting cross beam 20. Of course, the foregoing are only some of the preferred forms of the invention; the position of the reinforcing ribs 23 and the shape of the two sub hollow portions 211 can also be adjusted by those skilled in the art according to specific design requirements.

In other embodiments of the present invention, as shown in fig. 10, a plurality of ribs 23 may be disposed inside the mounting beam 20 to divide the hollow portion 21 into a plurality of sub-hollow portions 211, wherein the sub-hollow portions 211 are filled with a functional material; the partial sub hollow portion 211 is filled with a cooling medium for cooling the sub hollow portion 212; and a partial sub-hollow 211 is also provided for the lead wire.

In some embodiments of the present invention, as shown in fig. 8 or 9, at least one vertical partition 114 perpendicular to the upper plate 111 or the lower plate 112 is disposed between the upper plate 111 and the lower plate 112, and the buffer cavity 113 is divided into at least two sub-cavities 1131 by the partition 114. As shown in fig. 8, the buffer space in the subfloor 11 is divided into three sub-cavities 1131 by two partitions 114, and the three sub-cavities 1131 are provided with cooling ducts 1133 therein; as shown in fig. 9, the buffer space within the sub-base plate 11 is divided by two partitions 114 into three sub-cavities 1131, wherein at least one sub-cavity 1131 is a cooling sub-cavity 1132.

As described above, in general, the buffer cavity 113 is a cavity (generally rectangular cavity) parallel to the tray bottom plate 10, and the partition 114 is vertically oriented, i.e., perpendicular to the plane of the tray bottom plate 10, and extends in the width direction of the tray bottom plate 10; at this time, the vertical partition 114 divides the buffer chamber 113 into at least two sub-chambers 1131. The sub-cavities 1131 are also parallel to the direction of the tray bottom plate 10 and are respectively located at two sides of the isolation portion 114.

The design of isolation portion 114 can improve the whole mechanical strength of tray bottom plate 10 on the one hand, on the other hand also splits into two at least parts with buffering cavity 113 to set up other parts, for example can set up cooling duct 1133 in some subcavities 1131 or directly regard as cooling channel with part subcavities 1131 itself, also can set up phase change material 40 in some subcavities 1131, in order to improve the whole heat dissipation or heat preservation performance of tray bottom plate 10.

More specifically, the buffer chamber 113 extends in the width direction of the tray assembly for a vehicle (i.e., the width direction of the tray bottom 10), and the buffer chamber 113 is divided into at least two sub-chambers 1131 by the partition 114 extending in the width direction of the tray assembly for a vehicle. The above structure, which is a preferred embodiment of the present invention, further defines the penetrating direction of the sub-cavity 1131; in general manufacturing process, the tray bottom plate 10 is often formed by combining a plurality of sub bottom plates 11, each sub bottom plate 11 is arranged along the length direction of the tray bottom plate 10, and the buffer cavity 113 in each sub bottom plate 11 extends along the width direction of the tray bottom plate 10, so that the process machining is more convenient, a larger tray bottom plate 10 can be divided into a plurality of sub bottom plates 11 for manufacturing, the size is reduced, the smaller sub bottom plates 11 are easier to machine and manufacture, and the buffer cavities 113 in the inner parts are easier to mold.

In some embodiments of the present invention, the buffer cavities 113 on adjacent sub-bottom plates 11 may be all connected to each other, or may be partially connected to each other. In general, when the cooling duct cooling channel 1133 is disposed in the buffer cavity 113 on the sub-base plate 11, as shown in fig. 8, the buffer cavities 113 on adjacent sub-base plates 11 may be selected to be communicated with each other; therefore, the cooling duct cooling ducts 1133 in the buffer cavities 113 disposed on different sub-base plates 11 can be communicated to form an integrated cooling duct 1133. More specifically, when at least two sub-cavities 1131 are included in the sub-base plate 11, at least one sub-cavity 1131 is communicated between adjacent sub-base plates 11, so as to facilitate the arrangement and communication of the cooling duct 1133 into a whole. Especially when directly regarding a part of the sub-cavity 1131 as the cooling sub-cavity 1132, can communicate the cooling sub-cavity 1132 in the adjacent sub-cavity 1131 each other, form holistic cooling channel. More specifically, the separation portion 114 between the cooling sub-cavities 1132 of two adjacent sub-cavities 1131 may be made slightly shorter, so that the ends of the cooling sub-cavities 1132 may be opened to communicate with the two adjacent cooling sub-cavities 1132; the partitions 114 may be provided in the sub-cavity 1131 with cooling ducts 1133.

In general, if the cooling subcavities 1132 are all adjacent, it is sufficient to open directly at the end of the isolation portion 114; if the cooling sub-cavities 1132 are not adjacent, a circulation space (or a pipe) may be optionally provided at the end of the sub-base plate 11, so as to communicate the two adjacent cooling sub-cavities 1132 or the cooling pipes 1133 arranged in the adjacent sub-cavities 1131 through the circulation space.

In the above, no matter which embodiment is adopted, it is only necessary to form the cooling circulation channel by communicating the cooling channels in the tray bottom plate 10 or form the cooling circulation channel by communicating the cooling sub-cavities 1132 in the tray bottom plate 10; the above embodiments are only preferred embodiments of the present invention, so that the design is more internal space-saving, and the internal structure can be more conveniently and orderly designed, and do not constitute a mandatory limitation to the present invention.

In addition, in combination with the above structural design of the mounting beam 20, the cooling medium in the cooling channel in the tray bottom plate 10 or the cooling sub-cavity 1132 on the tray bottom plate 10 as the cooling channel may be drawn out and introduced through the hollow portion 21 on the mounting beam 20 to form a cooling circulation channel.

Specifically, in some embodiments of the present invention, cooling channels 1133 are disposed within at least one of the sub-cavities 1131. The upper portion of the cooling duct 1133 is attached to the upper plate 111, and the lower portion is attached to the lower plate 112, and the cooling duct 1133 may communicate with the cooling duct 1133 in the adjacent sub-cavity 1131 to form a cooling circulation channel, or may be introduced or extracted with a cooling medium through the hollow portion 21 of the mounting beam 20 (more preferably, through the cooling sub-hollow portion 212 in the mounting beam 20) to form a cooling circulation channel.

In still other embodiments, at least one of the sub-cavities 1131 is a cooling sub-cavity 1132 that acts as a cooling channel. The cooling sub-cavity 1132 is a cooling channel which takes the sub-cavity 1131 as a cooling medium, and the cooling medium is directly introduced into the sub-cavity 1131 to form the cooling channel. Similar to the formation of the specific cooling circulation channel provided with the cooling conduit 1133 in the sub-cavity 1131, the adjacent cooling sub-cavities 1132 may be communicated to form the cooling circulation channel, and the cooling medium may be introduced or extracted through the hollow portion 21 of the mounting beam 20 (more preferably, through the cooling sub-hollow portion 212 in the mounting beam 20) to form the cooling circulation channel.

In the cooling channel, the cooling sub-cavity 1132 or the cooling sub-hollow portion 212, the cooling medium may be a general liquid cooling medium (such as water, oil, etc.), or may be a special cooling medium, such as the phase-change material 40, etc.

In some embodiments of the invention, the cross-sectional area of the cooling subcavities 1132 is less than the cross-sectional area of the other subcavities 1131. The cross-sectional area refers to the area of the cross-section shown in fig. 9, i.e., the area of the cross-section taken on a plane perpendicular to the width direction of the tray bottom 10. Thus, the space in the sub-cavities 1131 can be more reasonably and fully utilized, and meanwhile, the flowability of the cooling medium and the space for providing other components in other sub-cavities 1131 are considered.

In some embodiments of the present invention, a battery mounting structure 30 for mounting a power battery is provided on the tray chassis 10. Generally, the mounting structure is a mounting structure with an internal threaded hole, and a power battery (preferably a module or a module) is fixed and mounted on the mounting structure. As shown in fig. 2, in some embodiments, a plurality of mounting structures are disposed on the tray bottom plate 10, wherein 4 mounting structures form a mounting assembly, and the power battery (module or module) is mounted on the mounting assembly. More specifically, 4 mounting structures may be provided on one sub-base plate 11, and the power battery is mounted on the four mounting structures; that is to say, a sub-base plate 11 corresponds a power battery module or power battery module, so just require sub-base plate 11's area, and the same or similar with the lower surface area size of power battery module, so, can make things convenient for structural design and composite erection with sub-base plate 11 and power battery module one-to-one.

In general, the tray base 10 is mounted in the form of a battery module; namely, a plurality of single batteries are firstly formed into a battery module, and then the battery module is installed on the tray bottom plate 10. Of course, if necessary, more mounting mechanisms may be disposed on the tray base 10, so that two mounting mechanisms correspond to one single battery. Of course, for ease of installation, structural rationality, and space utilization considerations, it is common to select the manner in which the battery modules are assembled.

In order to facilitate the combination of the tray bottom plate 10, the matching of the length and the width and the feasibility of manufacturing the sub bottom plates 11 are comprehensively considered, a plurality of sub bottom plates 11 are arranged along the length direction of the tray assembly for the vehicle, and meanwhile, the buffer cavities 113 extend along the width direction of the tray assembly for the vehicle. With the width direction of polylith sub-bottom plate 11 along automobile-used tray subassembly arrange, buffer cavity 113 extends along automobile-used tray subassembly's length direction simultaneously and compares, the length on the long limit of every sub-bottom plate 11 can be reduced to above-mentioned mode, the integrated into one piece of sub-bottom plate 11 of being convenient for, the design of buffer cavity 113 of also being convenient for.

In some embodiments of the present invention, a phase change material 40 is disposed within buffer cavity 113. The phase change material 40 can dissipate and absorb heat more effectively.

When the temperature of the battery is higher, the phase-change material 40 is heated, the solid state at the low temperature is changed into the liquid state, the heat conductivity is increased, the liquid phase-change material 40 forms a flowable cooling medium, cooling circulation convection heat exchange is formed, the heat dissipation effect of the power battery is increased, the temperature of the power battery is ensured to be within a preset range, and the safety and the service life of the power battery are ensured. When the temperature is lower, the phase-change material 40 changes from a liquid state to a solid state, so that the thermal conductivity is reduced, the power battery is insulated, and the low-temperature performance of the power battery is ensured.

As shown in fig. 5, the volume changes due to the change of the phase change material 40 in the solid and liquid states; thus, flow guide holes 22 are provided between the tray bottom plate 10 and the mounting cross member 20 to communicate with each other. In the solid state, the volume expands and excess volume is pushed out by the tray floor 10 into the hollow 21 of the mounting beam 20. When the liquid state is generated, the volume is shrunk, and the phase-change material 40 in the mounting beam 20 is changed into the liquid state and then flows into the buffer space on the tray bottom plate 10 through the diversion holes 22, so that the good thermal conductivity of the tray bottom plate 10 is ensured.

The phase-change material 40 is generally made of inorganic crystalline hydrated salt, paraffin and expanded graphite composite material and the like; organic higher aliphatic hydrocarbon, fatty acid and its lipid, alcohol, aromatic hydrocarbon and high molecular polymer.

The phase change temperature of the phase change material 40 is 10-40 ℃ according to the temperature requirement of the power battery, and the preferred temperature range is 15-30 ℃. The latent heat of phase change is in the range of 50 to 300J/g, preferably 90 to 150J/g.

The phase change material 40 may be filled within the cooling sub-cavity 1132 or within cooling conduits 1133 disposed within the sub-cavity 1131.

Similarly, in combination with the structural design of the cooling sub-cavity 1132, the phase change material 40 may also be disposed inside the cooling sub-cavity 1132.

Like a general tray assembly for a vehicle, the tray assembly further comprises a packaging cover, and the packaging cover, the tray bottom plate 10 and the mounting cross beam 20 together form a mounting space for mounting the power battery. More specifically, the mounting cross member 20 is fixed around the tray bottom plate 10 by welding or other mechanical connection, but the welding is preferred; and the periphery of the encapsulation cover is fixedly connected with the mounting cross beam 20 to finally form an integral tray assembly for the vehicle. Meanwhile, as a conventional tray assembly for a vehicle in the art, a mounting portion 60 is generally provided on the mounting cross member 20, and the tray assembly for a vehicle is mounted and fixed on the vehicle through the mounting portion 60.

Typically, a plurality of fastening holes are provided in the mounting beam 20, and the cover and the mounting beam 20 are fastened together by bolts.

The invention also provides an automobile which comprises the automobile tray component and the power battery arranged on the automobile tray component, wherein the automobile tray component is used for mounting the power battery. More specifically, the power battery is installed on the tray assembly for the vehicle, and meanwhile, the tray assembly for the vehicle is fixedly installed on the vehicle.

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 do not necessarily 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.

Although embodiments of the present invention have been shown and described above, 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 in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims

1. A vehicle tray assembly for mounting a power battery comprises a tray bottom plate and mounting cross beams arranged on the periphery of the tray bottom plate, and is characterized in that the tray bottom plate comprises at least one sub bottom plate, the sub bottom plate comprises an upper plate body, a lower plate body and a buffer cavity arranged between the upper plate body and the lower plate body, a hollow part and a reinforcing rib are arranged in the mounting cross beam and extend along the length direction of the mounting cross beam, the hollow part is a square hollow part, the reinforcing rib divides the hollow part into at least two sub hollow parts, one of the sub hollow parts is a triangular cross section, a leading-out opening is formed in the mounting cross beam, and a leading-out wire of the power battery arranged on the vehicle tray assembly is led out of the vehicle tray assembly through the leading-out opening; and the lower surface of the tray bottom plate is provided with radiating fins.

2. The tray assembly for mounting a power battery of claim 1, wherein a cooling duct is disposed within the buffer cavity.

3. The tray assembly for vehicle used to install power battery of claim 1, wherein the sub-base plate is an integrally extruded aluminum base plate.

4. The tray assembly for mounting a power battery of claim 1, wherein the tray bottom plate is formed by combining at least two sub bottom plates.

5. The tray assembly for vehicle for installing power battery as claimed in claim 4, wherein, the adjacent two sub-bottom plates are welded.

6. The tray assembly for vehicles used to install power batteries of claim 1, wherein the buffer cavity extends along the width direction of the tray assembly for vehicles.

7. The tray assembly for mounting a power battery for a vehicle as claimed in claim 1, wherein a cooling duct provided on the tray assembly for a vehicle is laid in the hollow portion and led out of the tray assembly for a vehicle through the outlet.

8. The tray assembly for mounting a power battery for a vehicle of claim 1, wherein at least one of the sub-hollows is used for laying a cooling duct mounted on the tray assembly for a vehicle.

9. The tray assembly for mounting a power battery for a vehicle of claim 1, wherein at least one of the sub-hollows is a cooling sub-hollow serving as a cooling channel.

10. The tray assembly for mounting a power cell for a vehicle of claim 9, wherein the cooling subsubhollow portion has a cross-sectional area smaller than that of the other subsubhollow portions.

11. The tray assembly for a vehicle used to mount a power cell of claim 1, wherein the mounting beam is an integrally extruded aluminum beam.

12. The tray assembly for mounting a power battery of claim 1, wherein at least one vertical partition perpendicular to the upper or lower plate is provided between the upper and lower plates, and the buffer chamber is divided into at least two sub-chambers by the partition.

13. The tray assembly for mounting a power cell of claim 12, wherein the cushion chamber extends in a width direction of the tray assembly for a vehicle, the cushion chamber being divided into at least two sub-chambers by a partition extending in the width direction of the tray assembly for a vehicle.

14. The tray assembly for mounting a power cell of claim 12 or 13 wherein a cooling duct is provided within at least one of the sub-cavities.

15. The tray assembly for mounting a power cell of claim 12 or 13 wherein at least one of the sub-cavities is a cooling sub-cavity that acts as a cooling channel.

16. The tray assembly for mounting a power cell of claim 15 wherein the cooling sub-cavity has a cross-sectional area less than the cross-sectional area of the other sub-cavities.

17. The tray assembly for mounting a power battery of claim 1, wherein the tray bottom plate is provided with a battery mounting structure for mounting the power battery.

18. The tray assembly for mounting a power battery of claim 1, wherein the sub-base plates are a plurality of sub-base plates arranged along the length direction of the tray assembly for a vehicle; the buffer cavity extends along the width direction of the tray component for the vehicle.

19. The tray assembly for mounting a power battery of claim 1, wherein a phase change material is disposed within the buffer cavity.

20. The vehicle tray assembly for mounting a power cell of claim 15, wherein a phase change material is disposed within the cooling subcavity.

21. The tray assembly for mounting a power battery of claim 1, further comprising a packaging cover, wherein the packaging cover, the tray bottom plate and the mounting cross beam form a mounting space for mounting the power battery.

22. The tray assembly for mounting a power battery of claim 1, wherein the lower surface of at least one of the sub-base plates is provided with heat dissipating fins.

23. The tray assembly for vehicle used for installing power battery as claimed in claim 1, wherein the heat dissipation fins are a plurality of sheets extending along the length direction of the tray assembly for vehicle.

24. The tray assembly for the vehicle used for installing the power battery as claimed in claim 22, wherein the sub-bottom plate comprises at least two sub-bottom plates, each sub-bottom plate is provided with a plurality of sheets extending along the length direction of the tray assembly for the vehicle, and the plurality of sheets on different sub-bottom plates are correspondingly positioned on the same straight line one by one.

25. The tray assembly for mounting a power battery for a vehicle of claim 23 or 24, wherein the heat dissipation fins are integrally formed with the tray bottom plate or the sub-bottom plate.

26. An automobile comprising a tray assembly for an automobile and a power battery arranged on the tray assembly for the automobile, wherein the tray assembly for the automobile is the tray assembly for the automobile for mounting the power battery as claimed in any one of claims 1 to 25.