CN215070305U

CN215070305U - Battery case lid, battery case and car

Info

Publication number: CN215070305U
Application number: CN202121405952.3U
Authority: CN
Inventors: 陶乃束; 肖聪; 马习涛
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-12-07
Anticipated expiration: 2031-06-23

Abstract

The application relates to a battery box cover, a battery box and an automobile. This battery case lid includes at least two-layer apron and an at least guide plate, wherein: at least two layers of cover plates are arranged at intervals along the height direction of the battery box body respectively; the guide plates are arranged between two adjacent layers of the cover plates, and two sides of each guide plate are respectively connected with the corresponding cover plates, so that an exhaust channel is formed between the two adjacent layers of the cover plates; or the battery box cover comprises at least one layer of cover plate, and the cover plate is provided with an exhaust channel along the height direction vertical to the battery box body. The scheme that this application provided can avoid flame and gas to pass the case lid and get into passenger's cabin, has guaranteed passenger's safety.

Description

Battery case lid, battery case and car

Technical Field

The application relates to the technical field of vehicles, in particular to a battery box cover, a battery box and an automobile.

Background

With the development of new energy industry, electric vehicles are more and more widely used. Electric vehicles are generally powered by battery modules. The battery module is integrated to be placed in the battery box, and the battery module is protected through the battery box. Wherein, the battery box includes box and case lid, and the box has been seted up and has been held the chamber, and the battery module is placed in holding the intracavity of box, and the case lid closes and covers on the box to make the box sealed, in order to completely cut off protection battery module.

In the related art, in order to increase the battery energy density, the lid of the battery box is used as the underbody, thereby reducing the number of vehicle body parts, increasing the space inside the box in the height direction thereof, and then increasing the arrangement space of the battery in the height direction to increase the battery energy density. However, since the passenger compartment is located above the underbody, when the battery is thermally out of control, fire flames may melt through the box cover, and the flames and gas enter the passenger compartment, thus endangering the safety of passengers and causing safety accidents.

SUMMERY OF THE UTILITY MODEL

In order to solve or partially solve the problems existing in the related art, the application provides a battery box cover, a battery box and an automobile.

The present application provides in a first aspect a battery case lid, wherein:

the battery case lid includes at least two-layer apron and an at least guide plate, wherein:

at least two layers of cover plates are arranged at intervals along the height direction of the battery box body respectively;

the guide plates are arranged between two adjacent layers of the cover plates, and two sides of each guide plate are respectively connected with the corresponding cover plates, so that an exhaust channel is formed between the two adjacent layers of the cover plates; or

The battery box cover comprises at least one layer of cover plate, and the cover plate is provided with the exhaust channel along the direction perpendicular to the height direction of the battery box body.

In one embodiment, the battery box cover further comprises an explosion-proof valve, and the explosion-proof valve is arranged on the cover plate close to the battery box body.

In one embodiment, a partial area of the cover plate adjacent to the battery case is a thinned area.

In one embodiment, the number of the baffles is multiple, and two adjacent baffles are arranged at intervals to form the exhaust passage.

In one embodiment, both ends of the exhaust channel extend in a direction perpendicular to the height direction of the battery case; and/or the exhaust channels are parallel or in communication with each other.

In one embodiment, the cover plate and the baffle are of an integrally formed structure.

In one embodiment, the cover plate and the guide plate are detachable structures.

In one embodiment, the cover plate is an aluminum profile structure, an aluminum plate structure, a steel plate structure or a composite material plate structure.

A second aspect of the present application provides a battery box, comprising the battery box body and the battery box cover of any of the above embodiments, wherein the battery box cover is disposed on the battery box body.

A third aspect of the present application provides an automobile including the battery box according to the above embodiment.

The technical scheme provided by the application can comprise the following beneficial effects:

according to the battery box cover, at least two layers of cover plates are arranged along the height direction of a battery box body, a guide plate is arranged between the cover plates, and two sides of the guide plate are respectively and correspondingly connected to the corresponding cover plates, so that an exhaust channel is formed between the cover plates; or at least one layer of cover plate is arranged, and an exhaust channel is arranged on the cover plate along the height direction vertical to the battery box body. Due to the design, when the battery is out of control due to thermal runaway and flame penetrates through the cover plate, high-temperature gas can penetrate through the penetrated cover plate and enter the exhaust channel to be discharged, and the cover plate above the exhaust channel can block the flame from entering the passenger cabin, so that the flame and the gas are prevented from penetrating through the battery box cover and entering the passenger cabin, and the safety of passengers is guaranteed.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic structural diagram of a battery case cover according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a battery case cover according to another embodiment of the present application;

FIG. 3 is a schematic diagram of a battery compartment cover according to another embodiment of the present application;

FIG. 4 is a schematic view of a portion of a battery compartment cover according to another embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a battery case cover shown in another embodiment of the present application along the Y-axis direction;

FIG. 6 is a schematic cross-sectional view of a battery case cover in the Y-axis direction according to another embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a battery case cover in the Z-axis direction according to an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a battery case cover taken along the Z-axis according to another embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of a battery case cover in the Z-axis direction according to another embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of a battery case cover in the Z-axis direction according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a cover plate according to an embodiment of the present application.

Reference numerals: a battery case cover 10; a cover plate 100; a first cover plate 110; a second cover plate 120; a baffle 200; a first guide plate 210; a second guide plate 220; an exhaust passage 300; an explosion-proof valve 400; a thinned region 500; a battery case 20; and a battery case 30.

Detailed Description

Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are illustrated in the accompanying drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. 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 application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In view of the above problems, the embodiment of the application provides a battery box cover, a battery box and an automobile, which can prevent flame and gas from penetrating through the box cover to enter a passenger compartment, and ensure the safety of passengers.

The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the battery box cover 10 of the present application includes at least two layers of cover plates 100 and at least one guide plate 200, wherein the at least two layers of cover plates 100 are respectively disposed along a height direction of the battery box 20 at intervals, the guide plate 200 is disposed between two adjacent layers of cover plates 100, and two sides of the guide plate 200 are respectively connected to the corresponding cover plates 100, so that an exhaust channel 300 is formed between the two adjacent layers of cover plates 100. Or, the battery box cover 10 includes at least one layer of cover plate 100, and the cover plate 100 is opened with an exhaust channel 300 along a direction perpendicular to the height direction of the battery box 20.

For convenience of explanation of the structure of the battery case cover 10, referring to fig. 4, the width direction of the battery case body is defined as the X-axis direction, the length direction of the battery case body is defined as the Y-axis direction, and the height direction of the battery case body is defined as the Z-axis direction.

To further describe the structure of the battery compartment cover 10, when the battery compartment cover 10 includes at least two layers of cover plates 100, the cover plate 100 adjacent to the battery compartment body 20 will be referred to as a first cover plate 110, and the cover plate 100 remote from the battery compartment body 20 will be referred to as a second cover plate 120. The battery box cover 10 is arranged in the automobile as a vehicle body bottom plate, a passenger compartment is arranged above the battery box cover 10, and a battery box body 20 is arranged below the battery box cover. The first cover plate 110 of the at least two layers of cover plates 100, which is close to the battery box 20, directly covers the battery box 20 and is connected with the battery box 20. At least two layers of cover plates 100 are arranged at intervals along the height direction of the battery box 20, that is, the cover plates 100 are stacked at intervals along the height direction of the battery box 20, and the cover plates 100 may be parallel to each other or may form a certain inclination angle with each other. The guide plate 200 is arranged at the interval between two adjacent layers of the cover plates 100, two sides of the guide plate 200 are respectively connected to the cover plate 100 at one corresponding side, and the guide plate 200 supports the two adjacent layers of the cover plates 100 to keep the interval between the two layers of the cover plates 100; meanwhile, the flow guide plate 200 may extend in any direction on a horizontal plane in which the cross section of the battery case 20 is located, so that the exhaust passage 300 is formed at an interval between two adjacent layers of the cover plates 100, that is, the extending direction of the flow guide plate 200 is perpendicular to the height direction of the battery case 20, so that the exhaust direction of the exhaust passage 300 is perpendicular to the height direction of the battery case 20. When the battery module in the battery box 20 is out of control due to heat, gas enters the space between the cover plates 100 and can be guided in the exhaust direction of the exhaust channel 300 in a directional manner, so that the gas is prevented from directly spreading upwards to the passenger compartment along the height direction of the battery box 20, and the safety accident risk is reduced. When the battery case cover 10 includes at least one layer of the cover plate 100, for example, only one layer of the cover plate 100, the thickness of the cover plate 100 may be a predetermined thickness, and then the exhaust passage 300 may be initiated in the cover plate 100. With such a structure, the side of the exhaust channel 300 close to the battery case 20 is equivalent to the first cover plate 110, the side of the exhaust channel 300 far from the battery case 20 is equivalent to the second cover plate 120, and the side wall of the exhaust channel 300 is equivalent to the flow guide plate 200, so that the exhaust effect of at least two layers of cover plates 100 can be achieved.

To sum up, in the battery box cover 10 of the present application, at least two layers of cover plates 100 are arranged, the at least two layers of cover plates 100 are arranged along the height direction of the battery box body, the guide plate 200 is arranged between the cover plates 100, and two sides of the guide plate 200 are respectively and correspondingly connected to the corresponding cover plates 100, so that the exhaust channel 300 is formed between the cover plates 100; or at least one layer of cover plate 100 is arranged on the battery box cover 10, and an exhaust channel 300 is arranged on the cover plate 100 along the height direction vertical to the battery box body 20. Due to the design, when the cover plate 100 is melted through by flame caused by thermal runaway of the battery, high-temperature gas can penetrate through the melted cover plate 100 and enter the exhaust channel 300 to be exhausted, and the cover plate 100 above the exhaust channel 300 can prevent the flame from entering the passenger compartment, so that the flame and the gas are prevented from penetrating through the box cover and entering the passenger compartment, and the safety of passengers is ensured.

In order to make the gas discharge channel port in the gas discharge channel 300, referring to fig. 4, 5, and 6, in one embodiment, both ends of the gas discharge channel 300 extend in a direction perpendicular to the height direction of the battery case 20; and/or the exhaust passages 300 are parallel to or in communication with each other. It is understood that the direction perpendicular to the height of the battery case 20 is the exhaust direction of the exhaust passage 300, that is, the direction perpendicular to the Z-axis is the exhaust direction of the exhaust passage 300. In an embodiment, the exhaust direction of the exhaust channel 300, i.e. the extending direction of the flow guide plate 200, may be parallel to any direction on the horizontal plane of the cross section of the battery case 20, i.e. the exhaust direction of the exhaust channel 300 may be parallel to any direction on the horizontal plane of the cross section of the battery case 20, i.e. the direction of the X axis, the direction of the Y axis, or the plane perpendicular to the Z axis, so that the exhaust direction is perpendicular to the height direction of the battery case 20, and the gas is prevented from exhausting to the passenger compartment along the height direction of the battery case 20, i.e. the gas is prevented from exhausting to the passenger compartment along the Z axis, thereby reducing the risk of safety accidents. When the exhaust channels 300 extend in a direction perpendicular to the height direction of the battery case 20, the exhaust channels 300 are located on the same plane, so that the gas in the exhaust channels 300 can be uniformly discharged outward. Wherein the exhaust passages 300 may not be communicated with each other, i.e., isolated from each other. In one embodiment, some of the exhaust passages 300 may be in communication with each other and some of the exhaust passages 300 may be isolated from each other. In order to more intensively evacuate the gas in the battery case 20, in one embodiment, portions of the exhaust passages 300 intersect, and the intersection regions of the exhaust passages 300 are disposed according to the position of the battery case 20, through which the intersecting exhaust passages 300 communicate. The exhaust passage 300 may intersect with the other exhaust passages 300, or a plurality of exhaust passages 300 may intersect with each other two by two or three by three, or all the exhaust passages 300 may intersect at a common intersection point and communicate with each other at the common intersection point, which is not limited herein. Further, in one embodiment, the partial exhaust passages 300 intersect at the same intersection point and communicate at the intersection point location. In an embodiment, the intersection area of the exhaust passages 300 may be located at a midpoint area of each exhaust passage 300, i.e., a central area of the cover plate 100. When the cover plate 100 is melted through in the intersection region, the gas may be dispersed to flow to the at least two exhaust channels 300 through the intersection region, so that the gas is rapidly exhausted. The intersection point area can be arranged corresponding to the center of the accommodating cavity of the battery box body. In one embodiment, the exhaust channels 300 are parallel to each other, and the exhaust channels 300 are not communicated with each other, so that the exhaust channels 300 correspond to different positions of the battery modules in the battery case, and the exhaust channels 300 are not interfered with each other, thereby preventing the diffusion of the smoke.

In order to evacuate the gas more quickly, referring to fig. 7, in an embodiment, the number of the guide plates 200 is multiple, two adjacent guide plates 200 are spaced to form the exhaust channel 300, and the apertures of the exhaust channels 300 are the same or different. To accommodate cover plates 100 of different area sizes, in one embodiment, the number of baffles 200 is set according to the area of the first cover plate 110 and/or the second cover plate 120, with the greater the area of the first cover plate 110 and/or the second cover plate 120, the greater the number of baffles 200. It is understood that the orientation of the baffles 200 on the cover plate 100 may be set according to the direction of the exhaust gas so that the flue gas can be exhausted along the exhaust passages 300 between the baffles 200. In one embodiment, the length of the baffle 200 may be set according to the length of the first cover plate 110 and/or the second cover plate 120, that is, the length of the baffle 200 may be set according to the length of the first cover plate 110 and/or the second cover plate 120 in the Y-axis direction. The length of the baffle 200 is the dimension parallel to the direction of the exhaust. In an embodiment, the lengths of different baffles 200 may be all the same, partially the same, or all the different. In order to increase the supporting strength of the battery case cover 10, further, the widths of the different baffles 200 may be different or the same. The width of the baffle 200 is a dimension perpendicular to the exhaust direction, i.e., the width of the contact surface of the baffle 200 with the cover plate 100, and referring to fig. 4, the width of the baffle 200 is a dimension of the baffle 200 in the X-axis direction. The greater the width of the baffle 200, the greater the support strength of the battery compartment cover 10. Further, the width of the baffle 200 can be set according to the position of the baffle 200 on the second cover plate 120. It can be understood that the second cover plate 120 is far away from the battery box 20 and closer to the passenger compartment, the stress degree of different positions of the passenger compartment is different, and the stress degree of the second cover plate 120 at different positions is different, so that the corresponding baffle 200 under the area where the stress degree of the second cover plate 120 is greater can be widened, for example, the corresponding baffle 200 under the passenger seat is widened. In order to make the baffle 200 support the cover plate 100 more stably, in one embodiment, the width of the single baffle 200 is increased toward the side close to the battery case 20 and/or increased toward the side away from the battery case, that is, the width of the single baffle 200 is changed in the Z-axis direction. When the width of the baffle 200 is increased toward the side close to the battery case, the contact area between the baffle 200 and the first cover plate 110 is increased, and the connection between the baffle 200 and the first cover plate 110 is reinforced; when the width of the baffle 200 is increased toward the side away from the battery case 20, that is, the width of the baffle 200 is increased toward the side of the second cover plate 120, the contact area between the baffle 200 and the second cover plate 120 is increased, and the connection between the baffle 200 and the second cover plate 120 is reinforced. In an embodiment, the single baffle 200 may also be divided into a first baffle 210 and a second baffle 220, i.e. the single baffle 200 is formed by the combination of the first baffle 210 and the second baffle 220. The first guide plate 210 is connected to the second guide plate 220, the first guide plate 210 is connected to the cover plate 100 close to the battery case 20, the second guide plate 220 is connected to the cover plate 100 far from the battery case 20, the width of the first guide plate 210 increases toward the side close to the battery case 20, and the width of the second guide plate 220 increases toward the side far from the battery case 20. That is, the single baffle 200 has a large width near both ends of the first cover plate 110 and the second cover plate 120 and a small width in the middle of the baffle 200. In an embodiment, the first guide plate 210 and the second guide plate 220 may be an integrally formed structure. By setting the width of the single guide plate 200 to a structure of which the size is changed, the caliber of the exhaust passage 300 can be adjusted, and the flow rate of the air flow of the exhaust passage 300 can be adjusted as required, so that the flow guide efficiency can be improved.

Referring to fig. 3 and 4, in an embodiment, the apertures of the exhaust passages 300 between two adjacent cover plates 100 may be the same, so that the gas is uniformly dispersed. Referring to fig. 7 to 9, in an embodiment, the apertures of the exhaust passages 300 between two adjacent cover plates 100 may be different, the apertures of any two exhaust passages 300 may be different, and the apertures of two adjacent exhaust passages 300 may be different; in one embodiment, the adjacent two cover plates 100 may be divided into regions, wherein the apertures of the exhaust channels 300 in different regions are different, and the apertures of the exhaust channels 300 in the same region are the same. Further, the caliber of the single exhaust passage 300 may vary in the exhaust direction. For example, the aperture of the exhaust passage 300 becomes gradually larger in one of the exhaust directions. By gradually enlarging the diameter of the exhaust passage 300, the gas is easier to be discharged directionally. For better occupant protection, referring to fig. 10, in an embodiment, the number of the cover plates 100 is at least three, that is, three layers of the cover plates 100 are arranged at intervals in the height direction of the battery case 20, that is, three layers of the cover plates 100 are arranged at intervals in the Z-axis direction, a flow guide plate 200 is arranged between two adjacent cover plates 100, and an exhaust passage 300 is formed between the adjacent cover plates 100. Further, the caliber of the exhaust passage 300 may be different between each layer of the cover plate 100. In one embodiment, the aperture of each layer of vent channels 300 varies in a direction toward the battery case 20. For example, the aperture of one of the exhaust channels 300 becomes larger toward the side close to the battery case. By enlarging the caliber of the lower exhaust channel 300, the gas is easier to be exhausted through the lower exhaust channel 300, so that the gas is blocked from overflowing to the passenger compartment layer by layer.

Referring to fig. 7-9, in one embodiment, the cross-section of the exhaust passage 300 may be quadrilateral, triangular, circular, or other geometric shape. In one embodiment, the exhaust passages 300 of different cross-sectional shapes may be spaced apart, such as the square cross-sectional exhaust passage 300 and the rectangular cross-sectional exhaust passage 300 of FIG. 8. For example, as shown in fig. 9, in one embodiment, the two adjacent cover plates 100 may be divided into regions, and the exhaust passages 300 having different cross-sectional shapes may be disposed in different regions.

To facilitate the manufacture of the battery compartment cover 10, in one embodiment, the cover plate 100 and the baffle 200 are integrally formed. In an embodiment, the cover plate 100 and the baffles 200 may be integrally formed, the cover plates 100 and the baffles 200 may be integrally formed, one cover plate 100 and one portion of the baffles 200 may be integrally formed, and the other cover plate 100 and the other portion of the baffles 200 may be integrally formed. Wherein, each cover plate 100 and each guide plate 200 can be formed into an integrally formed structure through an extrusion molding process and/or a stamping and tailor welding process. For example, each baffle 200 may be connected to the cover plate 100 by a die-welding process, or two spaced cover plates 100 and each baffle 200 connecting the two cover plates 100 may be formed by an extrusion process. In order to save materials, in one embodiment, the cover plate 100 and the baffle 200 are detachable. When there is damage to either one of the cover plates 100 or one of the baffles 200, the damaged baffle 200 and/or cover plate 100 can be replaced by removal. In one embodiment, the cover plate 100 and the baffle plate 200 are connected by screws, so that the baffle plate 200 and the cover plate 100 are fixedly connected, and the detachment can be realized by screws such as adjusting screws or bolts. In an embodiment, the cover plate 100 is provided with at least one slot (not shown), and the baffle 200 is inserted into the slot, so that the baffle 200 is disposed on the cover plate 100, thereby realizing the detachable connection between the cover plate 100 and the baffle 200.

In one embodiment, the cover plate 100 may be an aluminum profile structure, an aluminum plate structure, a steel plate structure, or a composite plate structure. In one embodiment, the structures of the cover plates 100 are all the same, some the same or all different. Wherein the texture of aluminium alloy structure and aluminum plate structure is lighter, and the intensity of steel sheet structure is great, and the combined material plate structure has the advantage on the multiple different performance. In one embodiment, the composite sheet may be a carbon fiber composite sheet or a silicon carbide fiber composite sheet. Different materials and corresponding processes can be selected to fabricate the cover plate 100 and the baffle plate 200 according to requirements. For example, each of the cover plates 100 and the baffle 200 may be manufactured by aluminum profile extrusion, so that the exhaust passage 300 is directly extruded. For example, the two-layer cover plate 100 is manufactured by stamping and tailor welding two layers of steel plates, and the exhaust passages 300 are formed by stamping the cover plate 100 through a stamping process, so that the guide plate 200 is stamped on the cover plate 100 to form the exhaust passages 300 of each type. For example, the two-layer cover plate 100 is manufactured by stamping and tailor-welding two layers of aluminum plates, and the cover plate 100 is stamped by a stamping process, so that the baffle 200 is punched on the cover plate 100 to form the exhaust passages 300 of various types. For example, the cover plate 100 is fabricated by punching a steel plate (or an aluminum plate) and a composite material, and the cover plate 100 is punched through a punching process, thereby punching the baffle plate 200 on the cover plate 100 to form various types of exhaust passages 300. That is, the baffle 200 can be manufactured by processing the material of the cover plate 100 itself, i.e., the baffle 200 does not need to be manufactured by separately selecting a material, so that the material cost is saved.

In order to more rapidly introduce gas into the gas discharge channel 300 when thermal runaway of the battery occurs, referring to fig. 11, in one embodiment, the battery case cover 10 further includes an explosion-proof valve 400, and the explosion-proof valve 400 is disposed adjacent to the cover plate 100 of the battery case body. The explosion-proof valve 400 is provided in the cover plate 100 adjacent to the battery case, that is, the explosion-proof valve 400 is provided in the first cover plate 110. When the battery module takes place thermal runaway, for example when the pressure in the battery box is greater than 0.1MPa or set pressure, explosion-proof valve 400 piece is automatic to be ruptured, prevents that the battery box from exploding to guarantee production and personal safety. To control the pressure within the vent passage 300, in one embodiment, the explosion-proof valve 400 is set according to the position of the vent passage 300. Further, a corresponding at least one explosion-proof valve 400 of a single exhaust passage 300. Further, the number of the explosion-proof valves 400 corresponding to a single exhaust passage 300 is set according to the length of the exhaust passage 300, and the longer the exhaust passage 300 is, the more the explosion-proof valves 400 are arranged to drain gas. In order to discharge the gas more promptly, in one embodiment, the position of the explosion-proof valve 400 is set according to the intersection region between the exhaust passages 300 communicating with each other, so that the explosion-proof valve 400 guides the gas inside the battery case to the intersection region of the exhaust passages 300, i.e., the position corresponding to the communication between the exhaust passages 300. The explosion-proof valve 400 is arranged at the area corresponding to the intersection point, so that the explosion caused by the overlarge pressure at the area of the intersection point is avoided.

In order to control the combustion range, referring to fig. 2 and 11, in one embodiment, at least a portion of the area of the cover plate 100 adjacent to the battery case is an explosion-proof valve 500 to set a point to limit the combustion range in which thermal runaway of the battery occurs. That is, the explosion proof valve 500 is provided to the first cover plate 110. In one embodiment, the thickness of the explosion-proof valve 500 is less than the thickness of the single-layer cover plate 100. Through setting up explosion-proof valve 500, when battery module takes place the thermal runaway, can make the region of the apron 100 that explosion-proof valve 500 corresponds can preferentially burn the damage to make the flue gas can pass the explosion-proof valve 500 after the damage and get into exhaust passage 300 in, then can the drainage smoke exhaust, avoid the thermal runaway diffusion. In an embodiment, the explosion-proof valve 500 may be disposed at a partial region of a side of the cover plate 100 facing the exhaust passage 300 and/or a side of the cover plate 100 facing away from the exhaust passage 300, so that the explosion-proof valve 500 is formed by reducing the thickness of the partial region of the cover plate 100. In one embodiment, the position of the explosion-proof valve 500 is set according to the position of the exhaust passage 300. Further, the single exhaust passage 300 corresponds to at least one explosion-proof valve 500. The number and size of the explosion-proof valves 500 are set according to the length of the exhaust passage 300, and the longer the exhaust passage 300 is, the larger the number of the explosion-proof valves 500 corresponding to the exhaust passage 300 is, and the larger the area is. Wherein, the explosion-proof valves 500 corresponding to different exhaust channels 300 can also be combined or communicated. In one embodiment, the explosion-proof valves 500 corresponding to different exhaust passages 300 are aligned.

To sum up, the battery case lid 10 of this application sets up along the direction of height interval of battery case 20 respectively through at least two-layer apron 100, it forms exhaust passage 300 to set up guide plate 200 between apron 100, through to setting up the same or different exhaust passage 300 bore, and extend the direction of height of perpendicular to battery case body with exhaust passage 300's both ends, and be parallel to each other or the intercommunication setting with exhaust passage 300, form the exhaust passage 300 that the structure differs according to the demand, make exhaust passage 300 can be faster and more convenient guide gaseous outflow exhaust passage 300. In addition, the explosion-proof valve 400 and the explosion-proof valve 500 are provided at the cover plate 100 to prevent explosion and control the spread range of gas and flame. The cover plate 100 is of an aluminum profile structure, an aluminum plate structure, a steel plate structure or a composite plate structure, so that the cover plate 100 is lighter, higher in strength and more flexible in processing technology. And the integrated structure of the cover plate 100 and the guide plate 200 makes the battery case cover 10 more convenient to manufacture, and the detachable structure of the cover plate 100 and the guide plate 200 makes the cover plate 100 and the guide plate 200 convenient to replace, thereby saving the cost.

Corresponding to the embodiment of the battery box cover 10 for realizing the application function, the application also provides a battery box, an automobile and corresponding embodiments.

Referring to fig. 4, the battery box 30 of the present application includes a battery box body 20 and the battery box cover 10 of any of the above embodiments, and the battery box cover 10 is disposed on the battery box body 20. In one embodiment, the battery housing 20 defines a receiving cavity (not shown) for receiving a battery module (not shown). The automobile of the application comprises the battery box 30 of any one of the above embodiments. The number of the battery case cover 10 and the number of the battery case 20 may be different. For example, in one embodiment, the battery box 30 may include one battery box cover 10 and a plurality of battery boxes 20, that is, the plurality of battery boxes 20 share one battery box cover 10, and the coverage area of a single battery box cover 10 is equal to the sum of the cross-sectional areas of the plurality of battery boxes 20. In an embodiment, the battery box 30 may also include a plurality of battery box covers 10 and a plurality of battery box bodies 20, and each battery box cover 10 is connected to a corresponding battery box body 20. In which the battery cases 10 are connected to each other so that a vehicle body floor of an automobile can be built up.

The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A battery box cover is characterized in that:

the guide plates are arranged between two adjacent layers of the cover plates, two sides of each guide plate are respectively connected with the corresponding cover plates, and an exhaust channel is formed between two adjacent layers of the cover plates; or

2. The battery case cover according to claim 1, characterized in that:

the battery box cover further comprises an explosion-proof valve, and the explosion-proof valve is arranged on the cover plate close to the battery box body.

3. The battery case cover according to claim 1, characterized in that:

the partial area of the cover plate close to the battery box body is a thinning area.

4. The battery case cover according to claim 1, characterized in that:

the number of the guide plates is multiple, and two adjacent guide plates are arranged at intervals to form an exhaust channel.

5. The battery case cover according to claim 1, characterized in that:

the two ends of the exhaust channel extend along the height direction vertical to the battery box body; and/or the exhaust channels are parallel or in communication with each other.

6. The battery case cover according to claim 1, characterized in that:

the cover plate and the guide plate are of an integrally formed structure.

7. The battery case cover according to claim 1, characterized in that:

the cover plate and the guide plate are of detachable structures.

8. The battery case cover according to claim 1, characterized in that:

the cover plate is of an aluminum profile structure, an aluminum plate structure, a steel plate structure or a composite material plate structure.

9. A battery box, its characterized in that: comprising the battery case and the battery case cover of any one of claims 1 to 8, which is provided to the battery case.

10. An automobile, characterized in that: the automobile includes the battery box of claim 9.