CN217903273U

CN217903273U - Battery box, battery package and vehicle

Info

Publication number: CN217903273U
Application number: CN202220885879.2U
Authority: CN
Inventors: 杨小亮; 郭军; 徐超; 刘东秦; 柳志民
Original assignee: Beijing Chehejia Automobile Technology Co Ltd
Current assignee: Beijing Chehejia Automobile Technology Co Ltd
Priority date: 2022-04-17
Filing date: 2022-04-17
Publication date: 2022-11-25
Anticipated expiration: 2032-04-17

Abstract

The utility model discloses a battery box, battery package and vehicle, the battery box includes: the lower end of the upper box body is provided with a first contact surface surrounding the accommodating cavity; the upper end of box is equipped with including encircleing hold the second contact surface in chamber down, first contact surface with one of second contact surface is equipped with the bulge, first contact surface with another one in the second contact surface is equipped with the depressed part, go up the box with the box links to each other and inject down hold the chamber, wherein, first contact surface with second contact surface sealing connection, just the bulge cooperation is in the depressed part. The utility model discloses a battery box has the location convenience, sealed effectual advantage.

Description

Battery box, battery package and vehicle

Technical Field

The utility model relates to an automobile parts technical field specifically, relates to a battery box, battery package and vehicle.

Background

The battery pack of the vehicle generally comprises a battery box, and an electric core group, a thermal management system and an electric system which are arranged in a containing cavity of the battery box, wherein the battery pack is connected with a vehicle body of the vehicle through the battery box, an upper box body of the battery box is connected with the vehicle body, and a lower box body of the battery box is connected with the upper box body. In the related art, the contact surface of the upper box body and the lower box body is a plane, so that the butt joint positioning of the upper box body and the lower box body is inconvenient, and the sealing effect is poor.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the utility model provides a battery box, this battery box has the location convenience, sealed effectual advantage.

The embodiment of the utility model also provides a battery package, this battery package have the battery box of above-mentioned embodiment.

The embodiment of the utility model provides a vehicle is still provided, and this vehicle has the battery package of above-mentioned embodiment.

The utility model discloses battery box, battery box has the chamber that holds the battery, battery box includes: the lower end of the upper box body is provided with a first contact surface surrounding the accommodating cavity; lower box, the upper end of box is equipped with including encircleing hold the second contact surface in chamber down, first contact surface with one of second contact surface is equipped with the bulge, first contact surface with another one in the second contact surface is equipped with the depressed part, go up the box with the box links to each other and inject down hold the chamber, wherein, first contact surface with second contact surface sealing connection, just the bulge cooperation is in the depressed part.

The utility model discloses battery box passes through first contact surface and second contact surface sealing connection, and utilizes the bulge of one in first contact surface and the second contact surface and the depressed part cooperation of another in first contact surface and the second contact surface to conveniently go up the butt joint location of box and lower box, and can increase the area of contact of box and lower box, thereby can improve sealed effect.

Therefore, the utility model discloses battery box has the location convenience, sealed effectual advantage.

In some embodiments, the second contact surface comprises a sunken surface surrounding the receiving cavity, the sunken surface being in sealing connection with the first contact surface.

In some embodiments, the second contact surface comprises a recess surrounding the receiving cavity, a bottom wall surface of the recess forming the sinking surface; and/or the presence of a gas in the atmosphere,

the second contact surface comprises a step surrounding the receiving cavity, and the tread of the step forms the sinking plane.

In some embodiments, the upper case includes a plurality of first side plates and at least one second side plate, the plurality of first side plates and the at least one second side plate are arranged along a circumferential direction of the accommodating chamber, the lower case includes at least one third side plate, the first contact surface includes a lower surface of the first side plate and a lower surface of the second side plate, the second contact surface includes an upper surface of the third side plate, at least a portion of the recess is provided on the lower surface of the second side plate, the protrusion is provided on the upper surface of the third side plate, and the side wall surfaces of the accommodating chamber are formed on the first side plate, the second side plate, and the third side plate.

In some embodiments, the upper case is integrally formed with the vehicle body.

In some embodiments, the upper box further comprises an upper frame, the first side plate and the second side plate are connected with the upper frame, the vehicle body comprises a threshold beam and a seat cross beam, and the threshold beam and the seat cross beam are connected and form the upper frame.

In some embodiments, the lower case further includes a lower frame, the third side plate is connected to the lower frame, a portion of the second contact surface is disposed on the lower frame, and another portion of the second contact surface is disposed on an upper surface of the third side plate to form the protruding portion.

In some embodiments, the threshold beam is two and is in the length direction interval arrangement of seat crossbeam, the seat crossbeam is connected two between the threshold beam, go up the box and include two first curb plate, two first curb plate is in the length direction interval arrangement of seat crossbeam, two first curb plate respectively with two the threshold beam links to each other.

In some embodiments, the seat cross member is plural and arranged at intervals in a length direction of the rocker beam, the upper box body includes two of the second side plates, the lower box body includes two of the third side plates, the two of the second side plates are arranged at intervals in a width direction of the seat cross member, the two of the third side plates are arranged at intervals in the width direction of the seat cross member, and the two of the second side plates are connected to the two of the seat cross members located at the edges, respectively.

The utility model discloses battery package includes above-mentioned any embodiment battery box.

The vehicle of the embodiment of the utility model provides a vehicle includes above-mentioned embodiment the battery package.

Drawings

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

Fig. 2 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the lower box body according to the embodiment of the present invention.

Fig. 4 is a partially enlarged schematic view at a in fig. 3.

Fig. 5 is a partially enlarged schematic view at B in fig. 3.

Fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Reference numerals:

a battery case 100;

a housing chamber 10;

an upper box body 1; a first contact surface 11; a recessed portion 111; a first side panel 12; a second side plate 13; an upper frame 14; a threshold beam 141; a seat cross member 142; an upper cooling plate 15; a first limit step 16; first kick surface 161; a first tread 162; a second limiting step 17; a second kick surface 171; a second tread 172;

a lower box body 2; a second contact surface 21; the convex portion 211; a sinking plane 212; a third side panel 22; a lower cooling plate 23; a bottom guard plate 24; a lower frame 25; a mounting groove 251;

and a battery 3.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The battery box according to the embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 6, a battery box 100 according to an embodiment of the present invention includes an upper box 1 and a lower box 2, wherein the battery box 100 has a receiving cavity 10 for receiving a battery 3.

Wherein, the lower end of the upper box body 1 is provided with a first contact surface 11 surrounding the accommodating cavity 10.

The upper end of the lower case 2 is provided with a second contact surface 21 surrounding the accommodating chamber 10, one of the first contact surface 11 and the second contact surface 21 is provided with a protrusion 211, the other of the first contact surface 11 and the second contact surface 21 is provided with a recess 111, and the upper case 1 is connected with the lower case 2 and defines the accommodating chamber 10. Wherein the first contact surface 11 is sealingly connected with the second contact surface 21 and the protrusion 211 fits within the recess 111.

It can be understood that the utility model discloses battery box 100 is through first contact surface 11 and second contact surface 21 sealing connection, and utilizes the bulge 211 of one in first contact surface 11 and second contact surface 21 and the depressed part 111 cooperation of the other in first contact surface 11 and second contact surface 21 to make things convenient for the butt joint location of last box 1 and lower box 2, and can increase the area of contact of last box 1 and lower box 2, thereby can improve sealed effect.

In some alternative embodiments, as shown in fig. 1 to 5, the concave portion 111 is disposed on the first contact surface 11, the convex portion 211 is disposed on the second contact surface 21, the upper case 1 is connected to the lower case 2, and the concave portion 111 of the upper case 1 can be matched with the convex portion 211 of the lower case 2, wherein the extending direction of the convex portion 211 is consistent with the width direction (for example, the left-right direction in fig. 1) of the lower case 2, the first contact surface 11 at the lower end of the upper case 1 is contacted with the second contact surface 21 at the upper end of the lower case 2, so that the upper case 1 and the lower case 2 can be connected in a sealing manner.

It can be understood that the lower case 2 can be provided with the electrical connector and the water faucet connector on the side wall having the protrusion 211, and the protrusion 211 on the side wall is matched with the recess 111 of the upper case 1, so that the overall height of the lower case 2 is not increased, and thus the height of the battery box 100 can be reduced, thereby reducing the occupied space of the battery pack.

In some embodiments, as shown in fig. 1-5, the second contact surface 21 includes a sunken surface 212 surrounding the receiving cavity 10, the sunken surface 212 being in sealing connection with the first contact surface 11.

It is understood that the sunken surface 212 may be provided with a sealing ring or a sealing rubber strip to be in sealing connection with the first contact surface 11, so that the sealing effect of the battery box may be improved. In addition, a part of the second contact surface 301 forms the sunken surface 3012, and the other part of the second contact surface 301 can limit the compression amount of the sealing ring or the sealing rubber strip, so that the sealing effect of the sealing ring or the sealing rubber strip is ensured.

Of course, the sinking surface 212 may be provided with other sealing structures, such as a painted or filled sealant,

in some alternative embodiments, the second contact surface 21 comprises a recess surrounding the receiving cavity 10, the bottom wall surface of the recess forming a sunken surface 212; and/or the second contact surface 21 comprises a step surrounding the housing chamber 10, the tread of the step forming the sinking plane 212.

Preferably, the second contact surface 21 comprises a step surrounding the housing chamber 10, the tread of which forms the sunken face 212. Wherein the step is disposed adjacent to the receiving cavity 10. It will be appreciated that the step comprises a tread and a riser, and the angle between the tread and the riser is greater than 45 degrees, in particular 90 degrees. One part of the second contact surface 21 is a plane, the other part is a step, the tread surface is parallel to the plane part of the first contact surface 11, and the kick surface of the step is perpendicular to the plane part of the tread surface and the first contact surface 11.

Therefore, the battery box 100 of the embodiment of the present invention has a better sealing effect.

It will be appreciated that the first contact surface 11 and the second contact surface 21 may be sealingly connected using other configurations.

In some embodiments, as shown in fig. 1, the upper box body 1 includes a plurality of first side plates 12 and at least one second side plate 13, and the plurality of first side plates 12 and the at least one second side plate 13 are arranged along the circumference of the accommodating cavity 10, in other words, the plurality of first side plates 12 and the at least one second side plate 13 are arranged around the accommodating cavity 10.

The lower case 2 includes at least one third side panel 22, the first contact surface 11 includes a lower surface of the first side panel 12 and a lower surface of the second side panel 13, the second contact surface 21 includes an upper surface of the third side panel 22, at least a portion of the recess 111 is provided on the lower surface of the second side panel 13, the protrusion 211 is provided on the upper surface of the third side panel 22, and side wall surfaces of the accommodation chamber 10 are formed on the first side panel 12, the second side panel 13, and the third side panel 22, that is, the accommodation chamber 10 is defined between the first side panel 12, the second side panel 13, and the third side panel 22.

It will be appreciated that the third side plate 22 is upwardly convex and has a convex portion 211 formed on the upper surface thereof, so that the front and rear walls of the accommodating chamber are formed on the third side plate, thereby facilitating the mounting of electronic components such as a faucet connector and an electrical connector on the third side plate 22.

In some embodiments, the upper box 1 is integrally formed with the vehicle body, that is, the vehicle body is provided with the upper box 1.

It will be appreciated that the second contact surface 21 is provided with protrusions 211 and cooperates with the recesses 111 of the first contact surface 11 to reduce the height of other portions of the first contact surface 11 and of the second contact surface 21, such as the left and right ends of the second contact surface 21 as shown in fig. 1. That is, portions of the upper case 1 (e.g., left and right end portions of the upper case 1 in fig. 1) extend downward and contact other portions of the second contact surface 21, so that the side wall surfaces of the receiving cavity 10 are formed on the downwardly extending portions of the upper case 1, and the upper case 1 and the vehicle body are integrated, thereby further improving the degree of integration of the battery case 100.

The utility model discloses last box 1 and automobile body integrated into one piece of battery box 100 will go up box 1 and automobile body integration together, make and go up box 1 and automobile body and need not erection joint to make things convenient for the installation of battery box 100, still eliminated the structure redundancy effectively, improved the integrated level of whole car.

Therefore, the utility model discloses battery box 100 has simple to operate, advantage that the integrated level is high.

Further, the upper box 1 further includes an upper frame 14, the first side plate 12 and the second side plate 13 are connected to the upper frame 14, the vehicle body includes a threshold beam 141 and a seat cross member 142, and the threshold beam 141 and the seat cross member 142 are connected to form the upper frame 14.

It can be understood that the threshold beam 141 and the seat cross member 142 are connected and form the upper frame 14, and the first side plate 12 and the second side plate 13 are connected to the upper frame 14, thereby making the structure of the upper case 1 simple, and thus further improving the integration of the battery case 100.

Preferably, the first side plate 12 and the second side plate 13 are integrally formed with the upper frame, so that the integrity of the upper box body 1 is improved, the structural complexity of the upper box body 1 is reduced, and the integration level is further improved.

In some alternative embodiments, first interface 11 includes a lower surface of first side plate 12, a lower surface of second side plate 13, and a lower surface of an edge seat cross member 142 (e.g., seat cross member 142 located at a front end of upper frame 14 in fig. 1), and the lower surface of second side plate 13 and the lower surface of edge seat cross member 142 form recess 111.

In some alternative embodiments, the threshold beam 141 and the first side plate 12 are integrally die-cast, and the seat cross member 142 and the second side plate 13 are integrally die-cast, so that the upper case 1 has high structural strength, high integration, simple manufacturing process and low cost.

In some embodiments, as shown in fig. 1, the upper case 1 further includes an upper cooling plate 15, the upper cooling plate 15 is disposed below the upper frame 14 and is hermetically connected to the upper frame 14, and a top wall surface of the receiving cavity 10 is formed on the upper cooling plate 15, that is, a top surface of the receiving cavity 10 is formed on the cooling plate.

It can be understood that the upper cooling plate 15 is used for cooling the battery 3, and when the battery 3 is installed in the accommodating cavity 10, the upper cooling plate 15 abuts against the upper surface of the battery 3, so that the upper cooling plate 15 and the battery 3 can be in sufficient contact, so as to implement the function of cooling and dissipating heat of the battery 3 by the upper cooling plate 15.

In some alternative embodiments, the upper cooling plate 15 is connected to the rocker beam 141 and the seat cross member 142 by at least one of welding, bolting, and riveting, thereby securing the connection strength of the cooling plate to the upper frame 14.

In addition, a sealing ring and/or sealant can be used to realize the sealing connection between the upper cooling plate 15 and the upper frame 14, thereby effectively improving the integration level of the battery box 100.

Preferably, the vehicle body further includes a floor, and the upper cooling plate 15 is integrally formed with the floor. It can be understood that the upper cooling plate 15 integrates the function of the floor in the vehicle body, which not only can satisfy the pedaling condition of the user in the passenger compartment, but also can make the size of the battery box 100 in the height direction smaller, and thus can improve the integration level of the upper box body 1.

In some embodiments, as shown in fig. 1 and 3, the lower case 2 further includes a lower frame 25, the third side panel 22 is connected to the lower frame 25, a portion of the second contact surface 21 is disposed on the lower frame 25, and another portion is disposed on an upper surface of the third side panel 22 to form a protrusion 211. It can be appreciated that the third side plate 22 is connected to the lower frame 25, thereby making the structure of the lower case 2 simple, and thus further improving the integration of the entire vehicle.

For example, as shown in fig. 1, the lower frame 25 includes left and right end portions opposing in the left-right direction, and an upper surface of the left end portion, an upper surface of the right end portion, and an upper surface of the third side plate 22 form the second contact surface 21.

In some alternative embodiments, as shown in fig. 1 and 3, the lower box 2 further includes a lower cooling plate 23 and a bottom protection plate 24, the lower cooling plate 23 is disposed above the lower frame 25 and is hermetically connected to the lower frame 25, the bottom wall surface of the accommodating chamber 10 is formed on the lower cooling plate 23, and the bottom protection plate is disposed below the lower frame 25 and is hermetically connected to the lower frame 25.

It is understood that the bottom protection plate 24 is used for protecting the battery 3 and other precision components in the battery box 100, the lower cooling plate 23 is used for cooling the battery 3, and when the battery 3 is installed in the accommodating cavity 10, the lower cooling plate 23 abuts against the lower surface of the battery 3, so that the lower cooling plate 23 can be in sufficient contact with the battery 3, and the function of cooling and radiating the battery 3 by the lower cooling plate 23 can be realized.

In some alternative embodiments, the bottom cover 24 and the lower cooling plate 23 may be connected to the rocker beam 141 and the seat cross member 142 by at least one of welding, bolting, and riveting, thereby securing the connection strength of the bottom cover 24 and the lower cooling plate 23 to the lower frame 25.

In addition, a sealing ring and/or sealant can be used to realize the sealing connection between the lower cooling plate 23 and the lower frame 25, thereby effectively improving the integration level of the battery box 100.

Specifically, the upper surface of the lower frame 25 is provided with the mounting grooves 251, and the lower cooling plate 23 is fitted in the mounting grooves 251, so that the sealing effect of the lower cooling plate 23 can be improved, and the flatness of the upper surface of the lower frame 25 can be improved after the lower cooling plate 23 is mounted.

In some embodiments, as shown in fig. 1, the threshold beams 141 are two and are spaced apart in a length direction of the seat cross beam 142 (e.g., a front-rear direction in fig. 1), the seat cross beam 142 is connected between the two threshold beams 141, the upper case 1 includes two first side plates 12, the two first side plates 12 are spaced apart in the length direction of the seat cross beam 142 (e.g., a left-right direction in fig. 1), and the two first side plates 12 are connected to the two threshold beams 141, respectively.

It is understood that the two first side plates 12 may be connected below the two threshold beams 141, respectively; it is also possible that the two rocker beams 141 are part of each other, i.e. that the two rocker beams 141 form two second side plates 13, respectively.

In some embodiments, as shown in fig. 6, a limiting step is provided on an end surface of an end of the first side plate 12 facing away from the threshold beam 141 (e.g., a lower end of the first side plate 12 in fig. 6), wherein the limiting step includes a tread and a kick surface, and the tread and/or the kick surface forms a portion of the first contact surface 11.

For example, as shown in fig. 6, the first side plate 12 located at the left side of the upper case 1 has a first limit step 16, and the first limit step 16 includes a first kick surface 161 and a first tread surface 162, wherein the first kick surface 161 and the first tread surface 162 contact with the left end of the lower case 2. The first side plate 12 located on the right side of the upper case 1 has a second limit step 17, and the second limit step 17 includes a second kick surface 171 and a second tread surface 172, where the second kick surface 171 and the second tread surface 172 contact with the right end of the lower case 2. That is, a stopper groove engaged with the lower case 2 is formed between the first stopper step 16 and the second stopper step 17, and the width direction of the stopper groove is the left-right direction of the vehicle body.

It can be understood that the lower box body 2 is stopped against the first limit step 16 and the second limit step 17 and is limited in the limit groove in the left-right direction, and the lower box body 2 cannot move in the left-right direction under the limit of the limit groove, so that the lower box body 2 is conveniently connected with the upper box body 1, and the connection sealing performance of the upper box body 1 and the lower box body 2 can be higher.

In addition, as shown in fig. 4, after the lower box 2 is connected to the upper box 1, the lower surface of the lower box 2 is not lower than the lower end surface of the first side plate 12, that is, the lower surface of the lower box 2 is flush with the lower end surface of the first side plate 12, or the lower surface of the lower box 2 is higher than the lower end surface of the first side plate 12, that is, the lower box 2 is accommodated in the limiting groove, so that the integration level of the battery box 100 and the whole vehicle body is further improved.

In some embodiments, as shown in fig. 1 to 6, the seat cross member 142 is plural and arranged at intervals in a length direction (for example, a front-rear direction in fig. 1) of the threshold beam 141, the upper case 1 includes two second side plates 13, the lower case 2 includes two third side plates 22, the two second side plates 13 are arranged at intervals in a width direction (for example, a front-rear direction in fig. 1) of the seat cross member 142, the two third side plates 22 are arranged at intervals in the width direction of the seat cross member 142, and the two second side plates 13 are respectively connected to the two seat cross members 142 at edges.

Alternatively, the two second side plates 13 may be connected below the two seat cross members 142 at the edges, respectively; it is also possible for a part of the two seat cross members 142 located at the edge, respectively, i.e. the two seat cross members 142 located at the edge form the two second side plates 13, respectively.

It is understood that, similar to the first side plate 12, the two second side plates 13 may also be provided with a limiting step, so as to further limit the lower box body 2 in the front-rear direction, and further improve the connection sealing performance of the upper box body 1 and the lower box body 2.

The following describes a battery pack according to an embodiment of the present invention with reference to the drawings.

As shown in fig. 1 to 6, the battery pack according to the embodiment of the present invention includes a battery box 100 in any of the above embodiments. It can be understood that the battery box 100 of the battery pack of the embodiment of the present invention has the advantages of convenient installation and high integration level.

The utility model discloses the vehicle includes the battery package of above-mentioned embodiment.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

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

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present disclosure. 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 the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims

1. A battery box characterized in that the battery box has a housing chamber that houses a battery, the battery box comprising:

the lower end of the upper box body is provided with a first contact surface surrounding the accommodating cavity;

lower box, the upper end of box is equipped with including encircleing hold the second contact surface in chamber down, first contact surface with one of second contact surface is equipped with the bulge, first contact surface with another one in the second contact surface is equipped with the depressed part, go up the box with the box links to each other and inject down hold the chamber, wherein, first contact surface with second contact surface sealing connection, just the bulge cooperation is in the depressed part.

2. The battery box of claim 1, wherein the second contact surface comprises a depressed surface surrounding the receiving cavity, the depressed surface being in sealing connection with the first contact surface.

3. The battery box of claim 2, wherein the second contact surface comprises a groove surrounding the receiving cavity, a bottom wall surface of the groove forming the depressed surface; and/or the presence of a gas in the gas,

4. The battery box according to claim 1, wherein the upper box body includes a plurality of first side plates and at least one second side plate, the plurality of first side plates and the at least one second side plate are arranged along a circumferential direction of the accommodation chamber, the lower box body includes at least one third side plate, the first contact surface includes a lower surface of the first side plate and a lower surface of the second side plate, the second contact surface includes an upper surface of the third side plate, at least a part of the recess is provided on the lower surface of the second side plate, the protrusion is provided on the upper surface of the third side plate, and side wall surfaces of the accommodation chamber are formed on the first side plate, the second side plate, and the third side plate.

5. The battery box of claim 4, wherein the upper box body is integrally formed with a vehicle body.

6. The battery box of claim 5, wherein the upper box further comprises an upper frame, the first side plate and the second side plate are connected to the upper frame, the vehicle body comprises a threshold beam and a seat cross beam, and the threshold beam and the seat cross beam are connected and form the upper frame.

7. The battery box of claim 4, wherein the lower box further comprises a lower frame, the third side plate is connected to the lower frame, a portion of the second contact surface is disposed on the lower frame, and another portion of the second contact surface is disposed on the upper surface of the third side plate to form the protrusion.

8. The battery box of claim 6, wherein the threshold beams are two and spaced apart along a length of the seat cross member, the seat cross member is connected between the two threshold beams, the upper box body includes two first side plates, the two first side plates are spaced apart along the length of the seat cross member, and the two first side plates are respectively connected to the two threshold beams.

9. The battery box according to claim 8, wherein the seat cross member is plural and arranged at intervals in a length direction of the threshold beam, the upper box body includes two of the second side plates, the lower box body includes two of the third side plates, the two of the second side plates are arranged at intervals in a width direction of the seat cross member, the two of the third side plates are arranged at intervals in the width direction of the seat cross member, and the two of the second side plates are connected to the two of the seat cross members at edges, respectively.

10. A battery pack characterized by comprising the battery case according to any one of claims 1 to 9.

11. A vehicle characterized by comprising the battery pack according to claim 10.