CN112448087B

CN112448087B - Heat insulating case and moving body

Info

Publication number: CN112448087B
Application number: CN201910809687.6A
Authority: CN
Inventors: 刘成川; 彭方宏; 曾慧; 陈强; 何利会
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2022-02-08
Anticipated expiration: 2039-08-29
Also published as: CN112448087A

Abstract

The invention relates to the technical field of heat insulation, and discloses a heat insulation shell and a moving body. A flow guide cavity is formed in the heat insulation shell and comprises a first side cavity wall facing the heat source, the flow guide cavity comprises a front cavity wall and a rear cavity wall which are arranged on two sides of the first side cavity wall in the advancing direction of the moving body, a front flow guide opening is formed in the front cavity wall, and a rear flow guide opening is formed in the rear cavity wall. In practical use, the heat insulation shell is arranged between a heat source of the moving body and the heat-proof part, hot wind exhausted by the heat source is blown on the outer surface of the wall of the first side cavity, the flow guide cavity can further slow down or prevent heat from being transferred to the heat-proof part, flowing air flow is generated among the front flow guide port, the flow guide cavity and the rear flow guide port when the moving body moves, the flowing air flow can accelerate convection, the temperature of the wall of the first side cavity tends to be uniform, local heat concentration is reduced, and the heat insulation shell can prevent the hot wind exhausted by the heat source from directly blowing the heat-proof part and has a good flow guide heat insulation effect in the moving process of the moving body.

Description

Heat insulating case and moving body

Technical Field

The invention relates to the technical field of heat insulation, in particular to a heat insulation shell and a moving body.

Background

At present, with the development of environmental protection and technology, electric vehicles are becoming more and more popular.

The electric vehicle is usually provided with a battery pack and a motor cooling fan, the main cooling surface of the battery pack is located at the bottom of the battery pack, and the air outlet end of the motor cooling fan is closer to the bottom of the battery pack.

Therefore, in the prior art, the battery pack shell adopts a double-layer aluminum plate structure, and adopts a cooling mode combining natural convection cooling and water cooling to ensure the heat dissipation of the battery pack.

Disclosure of Invention

The invention aims to provide a heat insulation shell which can be arranged between a heat source and a heat-proof part of a moving body in practical use so as to prevent hot wind exhausted by the heat source from directly blowing the heat-proof part, and has good flow-guiding and heat-insulating effects in the moving process of the moving body, so that the temperature of the heat-proof part is prevented from being excessively increased, and the service life of the heat-proof part is prolonged.

In order to achieve the above object, the present invention provides a thermal insulation shell, which is configured to be disposed on a moving body, and a diversion cavity is formed in the thermal insulation shell, wherein the diversion cavity includes a first side cavity wall for facing a heat source, the diversion cavity includes a front cavity wall and a rear cavity wall for being arranged on two sides of the first side cavity wall in a forward direction of the moving body, a front diversion port is formed on the front cavity wall, and a rear diversion port is formed on the rear cavity wall.

Through the technical scheme, the heat insulation shell is internally provided with the flow guide cavity, the flow guide cavity comprises the first side cavity wall facing the heat source, the flow guide cavity comprises the front cavity wall and the rear cavity wall which are oppositely arranged on two sides of the first side cavity wall in the advancing direction of the moving body, the front flow guide port is formed on the front cavity wall, and the rear flow guide port is formed on the rear cavity wall, so that the heat insulation shell can be arranged between the heat source and the heat-proof element of the moving body in practical use, at the moment, hot air exhausted by the heat source is blown on the outer surface of the first side cavity wall, the flow guide cavity can further slow down or prevent heat from being transferred to the heat-proof element, and meanwhile, when the moving body moves, flowing air flow can be generated among the front flow guide port on the front cavity wall, the flow guide cavity and the rear flow guide port on the rear cavity wall, the flowing air flow can accelerate convection, so that the temperature of the first side cavity wall tends to be uniform, and local heat concentration is reduced, thus, the heat insulating shell can be made to adopt a thin-walled structure without deformation, so that the self weight of the heat insulating shell can be reduced. Therefore, the heat insulation shell can prevent hot wind exhausted by a heat source from directly blowing the heat-proof part and has good flow guide and heat insulation effects in the moving process of the moving body, the temperature of the heat-proof part is prevented from being excessively increased, and the service life of the heat-proof part is prolonged.

Furthermore, the front flow guiding ports are multiple and are uniformly distributed at intervals along the extending direction of the front cavity wall; and/or the rear flow guide openings are uniformly distributed at intervals along the extension direction of the rear cavity wall.

Furthermore, each front diversion port and each corresponding rear diversion port share the same central axis.

Further, the outer side surface of the first side cavity wall facing the heat source is an inner concave arc-shaped surface.

Furthermore, the first side cavity wall is an inwards concave arc-shaped wall.

Still further, the diversion cavity includes a second side cavity wall disposed opposite the first side cavity wall.

Furthermore, the outer side surface of the second side cavity wall is an outer convex arc-shaped surface.

Further, the second side cavity wall is an outer convex arc-shaped wall.

In addition, a middle heat insulation plate positioned in the flow guide cavity is connected between the front cavity wall and the rear cavity wall, the flow guide cavity is divided into the first cavity and the second cavity by the middle heat insulation plate, and the front flow guide port and the rear flow guide port are formed on the cavity wall of the first cavity.

Further, the middle heat insulation plate is an arc-shaped plate protruding towards the wall of the first side cavity; and/or heat dissipation holes are formed in the wall of the second side cavity.

In addition, the invention provides a moving body, which comprises a moving body, a heat-proof part, a heat-radiating fan and the heat-insulating shell, wherein the heat-insulating shell is arranged between the heat-proof part and the heat-radiating fan, and the wall of the first side cavity faces to the air outlet end of the heat-radiating fan.

As described above, the hot air discharged by the cooling fan is blown on the outer surface of the wall of the first side cavity, and the flow guide cavity can further slow down or prevent heat transfer to the heat-proof member, and meanwhile, when the moving body moves, flowing air flows can be generated among the front flow guide port on the wall of the front cavity, the flow guide cavity and the rear flow guide port on the wall of the rear cavity, and the flowing air flows can accelerate convection, so that the temperature of the wall of the first side cavity tends to be uniform, and local heat concentration is reduced. Therefore, the heat insulation shell can prevent hot wind exhausted by the heat radiation fan from directly blowing the heat-proof part and has good flow guide and heat insulation effects in the moving process of the moving body, the temperature of the heat-proof part is prevented from being excessively increased, and the service life of the heat-proof part is prolonged.

Further, the moving body is an electric vehicle, the heat-preventing member is a battery pack, and the battery pack, the heat-insulating case, and the heat-dissipating fan are arranged in a height direction of the electric vehicle.

Drawings

FIG. 1 is a schematic perspective view of an insulation shell according to an embodiment of the present invention;

FIG. 2 is a schematic end view of the thermal shell of FIG. 1;

FIG. 3 is a schematic end view of another insulated shell according to an embodiment of the present invention;

FIG. 4 is a schematic side view of a movable body according to an embodiment of the present invention;

fig. 5 is a bottom view of the structure of fig. 4.

Description of the reference numerals

1-heat insulation shell, 2-flow guide cavity, 3-first side cavity wall, 4-front cavity wall, 5-rear cavity wall, 6-front flow guide opening, 7-rear flow guide opening, 8-second side cavity wall, 9-middle heat insulation plate, 10-first cavity, 11-second cavity, 12-moving body, 13-heat prevention part, 14-heat dissipation fan, 15-inner concave arc surface, 16-outer convex arc surface, 17-heat dissipation hole and 18-left cavity wall.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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. Referring to the structures shown in fig. 1 to 5, the heat insulation shell 1 provided by the present invention is used for being disposed on a moving body such as an electric vehicle, a diversion cavity 2 is formed in the heat insulation shell 1, wherein the diversion cavity 2 includes a first side cavity wall 3 for facing a heat source such as a heat dissipation fan, the diversion cavity 2 includes a front cavity wall 4 and a rear cavity wall 5 for being oppositely arranged at both sides of the first side cavity wall 3 in an advancing direction of the moving body, a front diversion port 6 is formed on the front cavity wall 4, and a rear diversion port 7 is formed on the rear cavity wall 5. Of course, as shown in fig. 1, the baffle chamber 2 includes a left chamber wall 18 and a right chamber wall.

In the technical scheme, as the heat insulation shell 1 is internally provided with the flow guide cavity 2, the flow guide cavity 2 comprises the first side cavity wall 3 facing the heat source, the flow guide cavity 2 comprises the front cavity wall 4 and the rear cavity wall 5 which are oppositely arranged at two sides of the first side cavity wall 3 in the advancing direction of the moving body, the front flow guide port 6 is formed on the front cavity wall 4, and the rear flow guide port 7 is formed on the rear cavity wall 5, as shown in fig. 1 and 2, in practical use, the heat insulation shell 1 can be arranged between the heat source and the heat-proof element of the moving body, at the moment, hot wind exhausted by the heat source sweeps on the outer surface of the first side cavity wall 3, and the flow guide cavity 2 can further slow down or prevent heat transfer to the heat-proof element, and meanwhile, when the moving body moves, flowing air flows (shown by solid line arrows in fig. 4) are generated among the front flow guide port 6 on the front cavity wall 4, the flow guide cavity 2 and the rear flow guide port 7 on the rear cavity wall 5 to timely take away heat in the flow guide cavity 2, and the flowing air flow can accelerate convection, so that the temperature of the first side cavity wall 3 tends to be uniform, and local heat concentration is reduced, therefore, the heat insulation shell can adopt a thin-wall structure without deformation, and the self weight of the heat insulation shell is reduced. Meanwhile, the flowing air flow effectively utilizes the motion of the moving body to form a heat-insulating barrier similar to an air curtain, the design is ingenious, the energy is saved, the heat-insulating effect is good, and the influence of a heat source on the heat-proof part is greatly weakened. Therefore, the heat insulation shell can prevent hot wind exhausted by a heat source from directly blowing the heat-proof part and has good flow guide and heat insulation effects in the moving process of the moving body, the temperature of the heat-proof part is prevented from being excessively increased, and the service life of the heat-proof part is prolonged.

In the heat insulation shell, the front diversion port 6 can be one and is close to two ends of the front cavity wall 4 along the whole length extension direction of the front cavity wall 4, and similarly, the rear diversion port 7 can be one and is close to two ends of the rear cavity wall 5 along the whole length extension direction of the rear cavity wall 5. Or, as shown in fig. 1, the front flow guiding ports 6 are a plurality of and are uniformly distributed at intervals along the extending direction of the front cavity wall 4, so that the self strength of the front cavity wall 4 can be improved while the flowing air flow can be formed, and the weight of the heat insulation shell can be reduced while the strength of the front cavity wall 4 can be satisfied by adopting a thin-wall structure; and/or, as shown in fig. 1, the rear flow guide openings 7 are a plurality of and are uniformly distributed at intervals along the extending direction of the rear cavity wall 5, so that the self strength of the rear cavity wall 5 can be improved while the flowing air flow can be formed, and the rear cavity wall 5 can adopt a thin-wall structure to reduce the weight of the heat insulation shell while the strength is met.

Of course, the front guide openings 6 and the rear guide openings 7 may be arranged in a staggered manner, or each front guide opening 6 and each rear guide opening 7 corresponding to each front guide opening 6 share the same central axis, that is, one front guide opening 6 corresponds to one rear guide opening 7 and the front guide opening and the rear guide opening share the same central axis, so that the flow of air can be further facilitated to be formed in the guide cavity 2, and the heat dissipation effect can be improved.

In addition, the outer side surface of the first side chamber wall 3 may be a flat surface, or, as shown in fig. 2 and 4, the outer side surface of the first side chamber wall 3, which is used to face the heat source, is an inward concave arc surface 15, so that the hot air flow blown by the heat source, such as the heat dissipation fan, onto the first side chamber wall 3 will flow along the inward concave arc surface, and under the drainage of the inward concave arc surface, the hot air flow will be drained away from the heat protection member at the end of the inward concave arc surface (the right end of the graphical interface of fig. 4), as shown by a dotted arrow in fig. 4, so as to further prevent the hot air flow exhausted by the heat dissipation fan from being sucked toward the heat protection member, and thus, the outlet rotational flow of the heat dissipation fan can be controlled, so that the hot air moves in the outlet direction of the heat dissipation fan, thereby improving the hot air isolation effect.

Of course, the first side chamber wall 3 may be a flat plate, but the outer side surface of the flat plate is recessed inward to form an inward concave arc surface. Or, as shown in fig. 2, the first side cavity wall 3 is an inward concave arc wall, so that the weight of the first side cavity wall 3 can be reduced while forming the inward concave arc surface, and the first side cavity wall 3 is also convenient to form, for example, a straight plate can be directly bent to form an arc plate.

In addition, in the heat insulating case of the present invention, the side of the heat insulating case disposed opposite to the first side chamber wall 3 may not be provided with the second side chamber wall 8, so that the baffle chamber 2 is formed as an open chamber. Alternatively, as shown in fig. 1 and 2, to further improve the thermal insulation effect, the diversion chamber 2 preferably includes a second side chamber wall 8 disposed opposite the first side chamber wall 3. The two ends of the second side cavity wall 8 are respectively connected with the front cavity wall 4 and the rear cavity wall 5, therefore, hot air exhausted by the cooling fan blows and sweeps the outer surface of the first side cavity wall 3, the flow guide cavity 2 can further slow down or prevent heat from being transferred to the heat-proof part, meanwhile, when the moving body moves, flowing air flow is easier to generate among the front flow guide port 6 on the front cavity wall 4, the flow guide cavity 2 and the rear flow guide port 7 on the rear cavity wall 5 so as to take away the heat in the flow guide cavity 2 in time, the flowing air flow can accelerate convection, the temperatures of the first side cavity wall 3 and the second side cavity wall 8 tend to be uniform, and local heat concentration is reduced.

In addition, the outer side surface of the second side cavity wall 8 may be a flat surface, or, as shown in fig. 2, the outer side surface of the second side cavity wall 8 is an outer convex arc surface 16, so that, in practical use, as shown in fig. 4, a flow channel with a large front, a small rear and a large rear is formed between the outer convex arc surface and the bottom surface of the heat-proof member, such as the bottom surface of the battery pack, so that when the moving body moves, it is easier for the airflow to rapidly pass through the flow channel, so as to improve the heat dissipation effect of the second side cavity wall 8, and further isolate the heat transfer to the bottom surface of the heat-proof member, such as the bottom surface of the battery pack.

Of course, the second side chamber wall 8 may be a flat plate, but the outer side surface of the flat plate is convex outward to form an outer convex arc surface 16. Alternatively, as shown in fig. 2, the second side wall 8 is a convex arc wall, so that the weight of the second side wall 8 can be reduced while forming the convex arc surface 16, and the second side wall 8 can be formed conveniently, for example, a straight plate can be directly bent to form an arc plate.

The first side cavity wall 3 and the second side cavity wall 8 may be aluminum plates to further improve the heat insulation effect, and of course, the first side cavity wall 3 and the second side cavity wall 8 may also be made of other materials.

Fig. 2 shows one form of construction of the thermal insulation shell provided by the present invention, and fig. 3 shows another form of construction of the thermal insulation shell provided by the present invention.

As shown in fig. 3, an intermediate heat insulation plate 9 located in the diversion chamber 2 is connected between the front chamber wall 4 and the rear chamber wall 5, the intermediate heat insulation plate 9 divides the diversion chamber 2 into a first chamber 10 between the first side chamber wall 3 and the intermediate heat insulation plate 9 and a second chamber 11 between the second side chamber wall 8 and the intermediate heat insulation plate 9, wherein the front diversion port 6 and the rear diversion port 7 are formed on the chamber wall of the first chamber 10, so that the heat transfer heat-proof member can be further prevented by double heat insulation of the first chamber 10 and the second chamber 11.

Certainly, the middle heat insulation plate 9 may be a flat plate, or, as shown in fig. 3, the middle heat insulation plate 9 is an arc plate protruding toward the first side cavity wall 3, so that a first cavity 10 with a large front, a small front, a medium rear and a large rear is formed between the middle heat insulation plate and the first side cavity wall 3, and it is easier to generate a fast flowing air flow among the front diversion port 6, the first cavity 10 and the rear diversion port 7 to take away heat in the first cavity 10 in time, and the flowing air flow can accelerate convection, so that the temperature of the first side cavity wall 3 tends to be uniform more quickly, and local heat concentration is reduced, and thus, the heat insulation shell can adopt a thinner wall structure without deformation while meeting the strength, so as to reduce the self weight of the heat insulation shell. And/or the second cavity 11 may be a closed cavity, or the second side cavity wall 8 is formed with heat dissipation holes 17 to discharge heat transferred into the second cavity 11, and the number of the heat dissipation holes 17 may be one, or may be a plurality of heat dissipation holes arranged at intervals, for example, uniformly arranged.

Furthermore, the present invention provides a moving body, as shown in fig. 4 and 5, comprising a moving body 12, a heat-proof member 13, a heat-dissipating fan 14, and the heat-insulating case 1 as described in any of the above, wherein the heat-insulating case 1 is disposed between the heat-proof member 13 and the heat-dissipating fan 14, and the first side chamber wall 3 faces the air outlet end of the heat-dissipating fan 14.

The heat preventing member 13 and the heat radiating fan 14 may be provided on the moving body 12, and the heat insulating case 1 may be coupled to the moving body 12, or the heat insulating case 1 may be coupled to the heat preventing member 13 through a coupling rib while being spaced apart from the heat preventing member 13.

Of course, the moving body may be any type of moving body, such as a rail vehicle, an automobile, or an electric automobile, for example, an electric bus. For example, the mobile body is an electric vehicle, the heat insulator 13 is a battery pack, and the battery pack, the heat insulating case 1, and the heat radiation fan 14 are arranged in the height direction of the electric vehicle.

Thus, in the embodiment shown in fig. 4, when the electric vehicle stops and the cooling fan works, the arc-shaped first side cavity wall 3 can ensure that the rotational flow at the outlet of the cooling fan cannot be sucked to the bottom of the battery pack shell, and the overall heat transfer coefficient of the flow guide cavity is small, so that the heat insulation and flow guide effects are achieved. When the electric vehicle runs, besides the heat insulation and flow guide effects, the front flow guide port, the rear flow guide port and the flow guide cavity can generate airflow due to relative movement of the electric vehicle, the airflow can accelerate heat dissipation of the first side cavity wall and the second side cavity wall so that the surface temperature tends to be uniform, local heat concentration is reduced, deformation of a thin-wall structure due to heat concentration is avoided, and weight reduction is performed on the whole vehicle.

In the present invention, unless otherwise expressly stated 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 formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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 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 to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The heat insulation shell is characterized in that the heat insulation shell (1) is arranged on a moving body, a flow guide cavity (2) is formed in the heat insulation shell, wherein the flow guide cavity (2) comprises a first side cavity wall (3) facing a heat source, the flow guide cavity (2) comprises a front cavity wall (4) and a rear cavity wall (5) which are oppositely arranged on two sides of the first side cavity wall (3) in the advancing direction of the moving body, a front flow guide opening (6) is formed in the front cavity wall (4), a rear flow guide opening (7) is formed in the rear cavity wall (5), the first side cavity wall (3) is an inwards concave arc wall, the outer side surface of the first side cavity wall (3) facing the heat source is an inwards concave arc surface, and an intermediate heat insulation plate (9) located in the flow guide cavity (2) is connected between the front cavity wall (4) and the rear cavity wall (5), the middle heat insulation plate (9) divides the diversion cavity (2) into a first cavity (10) and a second cavity (11), wherein the front diversion port (6) and the rear diversion port (7) are formed on the cavity wall of the first cavity (10).

2. The thermal insulation shell according to claim 1, wherein the front flow guiding ports (6) are distributed in plurality at intervals along the extending direction of the front cavity wall (4);

and/or the presence of a gas in the gas,

the rear flow guide openings (7) are multiple and are uniformly distributed at intervals along the extending direction of the rear cavity wall (5).

3. A shell according to claim 2, wherein each of said front portholes (6) and each of said respective rear portholes (7) share a common central axis.

4. The thermal insulation shell according to claim 1, characterized in that the flow guiding chamber (2) comprises a second side chamber wall (8) arranged opposite the first side chamber wall (3).

5. Heat insulation shell according to claim 4, characterized in that the outer lateral surface of the second side cavity wall (8) is an outer convex arc-shaped surface.

6. Heat insulation shell according to claim 5, characterized in that the second side cavity wall (8) is an outwardly convex curved wall.

7. The thermal insulation shell according to claim 4, characterized in that the second side wall (8) is formed with a heat dissipation aperture.

8. The insulation casing according to claim 1, characterized in that the intermediate insulation panel (9) is an arc-shaped panel projecting towards the first side chamber wall (3).

9. A moving body characterized by comprising a moving body (12), a heat-proof member (13), a heat-radiating fan (14) and the heat-insulating case (1) according to any one of claims 1 to 8,

the heat insulation shell (1) is arranged between the heat-proof piece (13) and the heat radiation fan (14), and the first side cavity wall (3) faces the air outlet end of the heat radiation fan (14).

10. The moving body according to claim 9, characterized in that the moving body is an electric vehicle, the heat-proof member (13) is a battery pack, and the battery pack, the heat-insulating case (1), and the heat-radiating fan (14) are arranged in a height direction of the electric vehicle.