CN212810418U

CN212810418U - Box, battery package and electric motor car

Info

Publication number: CN212810418U
Application number: CN202021735759.1U
Authority: CN
Inventors: 杨昆; 彭青波; 陶乃束; 王俊; 朱燕
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-03-26
Anticipated expiration: 2030-08-17

Abstract

The application discloses a box body, a battery pack and an electric vehicle, wherein the box body comprises a first sub-box body and a second sub-box body, and the first sub-box body is connected with the second sub-box body in a matched manner; the first sub-box body comprises a first bottom plate and a first frame, and the first frame is arranged on the first bottom plate in a surrounding mode and forms a first opening; the second sub-box body comprises a second bottom plate and a second frame, and the second frame is arranged on the second bottom plate in a surrounding mode and forms a second opening; the second frame is used for being connected with the first frame; the first sub-box body and the second sub-box body are buckled in the direction that the first opening part is opposite to the second opening part, and the second frame surrounds the first frame and is connected with the first frame in a sealing mode.

Description

Box, battery package and electric motor car

Technical Field

The application belongs to the technical field of lithium ion batteries, and particularly relates to a box body, a battery pack and an electric vehicle.

Background

With the increasing promotion of new energy automobiles in China, the pure electric automobile with the characteristics of green and environmental protection becomes the inevitable trend of the development of the automobile industry in the future, and the pure electric automobile gradually replaces the traditional fuel passenger car to become a common daily travel vehicle. As an important component of electric vehicles, improvements in various performances of lithium ion batteries have been the focus of attention in the industry. In the prior art, the sealing of the battery pack case is realized by forming a flange fastening surface on the upper case of the battery pack and then connecting the flange fastening surface to the lower case of the battery pack. The connection mode can increase the length and the width of the envelope of the whole battery pack, and can reduce the effective space for actually containing the battery in the box body within the specified envelope size; or in a limited space, the length direction and the width direction do not have enough space for the flange fastening surface of the upper box body of the battery to be connected with the lower box body.

In view of the above, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a box, battery package and electric motor car, solve the technical problem that the connection mode of the battery package box among the prior art can occupy the effective storage space of box.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a box, where the box includes:

the first sub-box body is connected with the second sub-box body in a matched manner;

the first sub-box body comprises a first bottom plate and a first frame, and the first frame is arranged on the first bottom plate in a surrounding mode and forms a first opening;

the second sub-box body comprises a second bottom plate and a second frame, and the second frame is arranged on the second bottom plate in a surrounding mode and forms a second opening;

the second frame is used for being connected with the first frame;

the first sub-box body and the second sub-box body are buckled in the direction that the first opening part is opposite to the second opening part, and the second frame surrounds the first frame and is connected with the first frame in a sealing mode.

Optionally, the first sub-box and the second sub-box are oppositely arranged along a first direction, and the second frame and the first frame are in sealing connection in a direction perpendicular to the first direction.

Optionally, the second frame and the first frame are hermetically connected by an adhesive.

Optionally, the second frame and the first frame are hermetically connected by bolts.

Optionally, a sealing bead is arranged around the edge of the second frame close to the first bottom plate, and the bolt is screwed at the sealing bead.

Optionally, the sealing bead comprises a plurality of sub-beads connected end to end, and the bolt is screwed at the joint of two adjacent sub-beads.

Optionally, foam is disposed between the second frame and the first frame.

Optionally, foam is arranged between the second frame and the first frame, a sealing bead is arranged on the edge, close to the first bottom plate, of the second frame in a surrounding mode, and the bolt is screwed at the sealing bead.

In a second aspect, an embodiment of the present application further provides a battery pack, where the battery pack includes the case body according to the first aspect and a battery module accommodated in the case body.

In a third aspect, embodiments of the present application further provide an electric vehicle, which includes the battery pack according to the second aspect.

The technical scheme adopted by the application can achieve the following beneficial effects:

in the case provided by the embodiment of the application, the flange fastening surface is not required to be arranged on the second sub-case along the length direction and the width direction of the case, but the second frame of the second sub-case is directly arranged outside the first frame of the first sub-case in a surrounding manner, and the second frame and the first frame are in sealing connection. Therefore, the size of the box body in the length direction and the width direction can not be occupied, the effective storage space of the box body in the length direction and the width direction can be enlarged, and the integral utilization efficiency of the box body is improved.

Drawings

Fig. 1 is a first schematic structural diagram of a box provided in an embodiment of the present application;

fig. 2 is a second schematic structural diagram of a box provided in the embodiment of the present application;

fig. 3 is a third schematic structural diagram of a box provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The track transportation system provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 1 and 2, an embodiment of the present application provides a box body, where the box body includes a first sub-box body 101 and a second sub-box body 102, and the first sub-box body 101 is connected to the second sub-box body 102 in a matching manner; the first sub-box 101 includes a first base 1011 and a first rim 1012, the first rim 1012 being disposed around the first base 1011 and forming a first opening; the second sub-casing 102 includes a second bottom plate 1021 and a second frame 1022, and the second frame 1022 surrounds the second bottom plate 1021 and forms a second opening; the second frame 1022 is used to connect with the first frame 1012; the first sub-casing 101 and the second sub-casing 102 are engaged with each other in a direction in which the first opening and the second opening face each other, and the second frame 1022 surrounds the first frame 1012 and is hermetically connected to the first frame 1012.

In the case provided in the embodiment of the present application, the second frame 1022 of the second sub case 102 is directly disposed outside the first frame 1012 of the first sub case 101 in a surrounding manner without providing a flange fastening surface on the second sub case 102 along the longitudinal direction and the width direction of the case, and the second frame 1022 and the first frame 1012 are hermetically connected. Therefore, the size of the box body in the length direction and the width direction can not be occupied, the effective storage space of the box body in the length direction and the width direction can be enlarged, and the integral utilization efficiency of the box body is improved.

In one embodiment, the first sub-case 101 and the second sub-case 102 are disposed opposite to each other along a first direction, and the second frame 1022 and the first frame 1012 form a sealing connection perpendicular to the first direction.

Referring to fig. 1 and 2, the first direction X is a thickness direction of the case. In the prior art, flange fastening surfaces are provided on the second sub-tank 102 along the length direction and the width direction perpendicular to the thickness direction, and then the flange fastening surfaces of the first sub-tank 101 and the second sub-tank 102 are fastened and connected along the thickness direction parallel to the tanks. In the embodiment of the present application, the second frame 1022 of the second sub-enclosure 102 is directly disposed outside the first frame 1012 of the first sub-enclosure 101, and then the second frame 1022 and the first frame 1012 are hermetically connected in a direction perpendicular to the thickness direction of the enclosure, which not only saves the effective storage space of the enclosure, but also has a simple connection manner and is easy to operate.

In one embodiment, the second rim 1022 and the first rim 1012 are hermetically connected by an adhesive.

Specifically, optionally, the adhesive may be, for example, a sealant, a layer of the sealant is coated on a periphery of the outside of the first frame 1012, then the second frame 1022 is connected to the outside of the first frame 1012, then the first sub-box 101 and the second sub-box 102 are pressed by using a pressing tool, after the sealant is cured, the first sub-box 101 and the second sub-box 102 are hermetically connected, and finally the pressing tool is detached.

Referring to fig. 1-3, in one embodiment, the second frame 1022 and the first frame 1012 are sealingly connected by bolts 103.

Specifically, a first threaded hole is formed in the first frame 1012, a second threaded hole is formed in the second frame 1022, and the first threaded hole is matched with the second threaded hole; after the second frame 1022 and the first frame 1012 are connected, the bolt 103 is screwed into the second screw hole and the first screw hole, and the first sub-housing 101 and the second sub-housing 102 are hermetically connected. Optionally, the first threaded hole is opened at a position of the first rim 1012 close to the first base plate 1011, and the first threaded hole is opened in plurality around the first rim 1012; the second threaded holes are formed in the edge of the second frame 1022 far away from the second base plate 1021, and a plurality of second threaded holes are formed in the periphery of the second frame 1022; the number of the first threaded holes corresponds to the number of the second threaded holes.

Referring to fig. 1 to 3, in one embodiment, further, a sealing bead 104 is circumferentially disposed on an edge of the second frame 1022 close to the first base plate 1011, and the bolt 103 is screwed on the sealing bead 104.

In this embodiment, after the second frame 1022 is sleeved outside the first frame 1012, the sealing bead 104 is disposed around the edge of the second frame 1022 close to the first base plate 1011, the sealing bead 104 is provided with a third threaded hole, the third threaded hole corresponds to the second threaded hole and the first threaded hole in a matching manner, and the bolt 103 is screwed into the corresponding third threaded hole, the second threaded hole and the first threaded hole, so as to achieve the sealing connection between the first sub-box 101 and the second sub-box 102. The sealing bead 104 is provided to enable the second frame 1022 to be tightly fitted with the first frame 1012, so that the first sub-case 101 and the second sub-case 102 are sealed better.

Referring to fig. 1-3, in an embodiment, the sealing bead 104 further includes several sub-beads connected end to end, and the joint of two adjacent sub-beads is screwed with the bolt 103.

Alternatively, the sealing bead 104 may be a unitary structure, but in order to better adapt to the size of the box, several segments of sub-beads are spliced end to form the sealing bead 104, so that the sealing bead 104 can be more closely attached to the second frame 1022, and the first sub-box 101 and the second sub-box 102 can be sealed better. In this embodiment, at least the joint of each two adjacent segments of the sub-pressing strips is screwed with a bolt 103, and optionally, a plurality of bolts 103 are further arranged between the joints of each two adjacent segments of the sub-pressing strips, so that the reliability of sealing the first sub-box 101 and the second sub-box 102 is ensured.

In one embodiment, further, the second frame 1022 and the first frame 1012 are hermetically connected by bolts 103 and foam is disposed between the second frame 1022 and the first frame 1012.

Optionally, in this embodiment, a layer of foam is first disposed between the second frame 1022 and the first frame 1012, and then the second frame 1022 and the first frame 1012 are hermetically connected by the bolts 103, the arrangement of the foam enables the second frame 1022 and the first frame 1012 to be more closely fitted, and the first sub-box 101 and the second sub-box 102 are better sealed.

In one embodiment, foam is further disposed between the second frame 1022 and the first frame 1012, a sealing bead 104 is disposed around the edge of the second frame 1022 close to the first base plate 1011, and the bolt 103 is screwed on the sealing bead 104.

In this embodiment, a layer of foam is firstly disposed between the second edge 1022 and the first edge 1012, then the sealing bead 104 is disposed around the edge of the second edge 1022 close to the first bottom plate 1011, and finally the second edge 1022 and the first edge 1012 are hermetically connected by the bolt 103. Through the arrangement of the foam and the sealing batten 104, the matching tightness of the second frame 1022 and the first frame 1012 is greatly improved, and the sealing between the first sub-box 101 and the second sub-box 102 is better.

Alternatively, the first frame 1012 may be a thin solid structure or a hollow structure, which saves raw materials and reduces the weight of the entire case. The first rim 1012 is integrally extruded and has a fillet welded at the transition corner.

Alternatively, the first sub-casing 101 and the second sub-casing 102 are both substantially rectangular, and rounded at four corners of the rectangle to form a rounded corner structure.

The embodiment of the application also provides a battery pack, the battery pack comprises the box body and a battery module accommodated in the box body.

The embodiment of the application also provides an electric vehicle, which comprises the battery pack.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A box body is characterized by comprising a first sub box body (101) and a second sub box body (102), wherein the first sub box body (101) is connected with the second sub box body (102) in a matched manner;

the first sub-box (101) comprises a first bottom plate (1011) and a first frame (1012), wherein the first frame (1012) is arranged on the first bottom plate (1011) in a surrounding manner and forms a first opening part;

the second sub-box (102) comprises a second bottom plate (1021) and a second frame (1022), wherein the second frame (1022) is arranged on the second bottom plate (1021) in a surrounding manner and forms a second opening part;

the second frame (1022) is used for being connected with the first frame (1012);

the first sub-case (101) and the second sub-case (102) are engaged with each other in a direction in which the first opening and the second opening face each other, and the second frame (1022) is provided around the outside of the first frame (1012) and is hermetically connected to the first frame (1012).

2. The cabinet as claimed in claim 1, wherein the first sub-cabinet (101) and the second sub-cabinet (102) are oppositely disposed along a first direction, and the second rim (1022) and the first rim (1012) form a sealing connection perpendicular to the first direction.

3. A cabinet as claimed in claim 1, wherein the second rim (1022) is sealingly connected to the first rim (1012) by an adhesive.

4. The cabinet as claimed in claim 1, wherein the second rim (1022) is hermetically connected to the first rim (1012) by a bolt (103).

5. A box body as claimed in claim 4, wherein a sealing bead (104) is circumferentially arranged on the edge of the second frame (1022) close to the first bottom plate (1011), and the bolt (103) is screwed on the sealing bead (104).

6. The box body as claimed in claim 5, wherein the sealing bead (104) comprises a plurality of sub-beads connected end to end, and the bolt (103) is screwed at the joint of two adjacent sub-beads.

7. A cabinet as claimed in claim 4, wherein foam is provided between the second rim (1022) and the first rim (1012).

8. A box body as claimed in claim 4, wherein foam is arranged between the second frame (1022) and the first frame (1012), a sealing bead (104) is arranged around the edge of the second frame (1022) close to the first bottom plate (1011), and the bolt (103) is screwed on the sealing bead (104).

9. A battery pack, characterized in that the battery pack comprises the case according to any one of claims 1 to 8 and a battery module housed in the case.

10. An electric vehicle characterized by comprising the battery pack according to claim 9.