CN217387361U

CN217387361U - Battery pack and vehicle

Info

Publication number: CN217387361U
Application number: CN202220619179.9U
Authority: CN
Inventors: 吴先钢; 赖庆; 杨鹏飞
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-09-06
Anticipated expiration: 2032-03-21

Abstract

The present application relates to a battery pack and a vehicle. The battery pack comprises a shell and a battery cell module; the shell comprises a first tray, a second tray and an upper cover plate which are sequentially arranged from bottom to top, and a first end plate, a second end plate, a first frame and a second frame which are respectively connected with the peripheries of the first tray and the upper cover plate in a sealing manner, wherein the first end plate and the second end plate are oppositely arranged, and the first frame and the second frame are oppositely arranged; a plurality of first cross beams are sequentially arranged between the first tray and the second tray at intervals along the horizontal direction, and a plurality of second cross beams are sequentially arranged between the second tray and the upper cover plate at intervals along the horizontal direction; at least, be provided with respectively between two adjacent first crossbeams and/or two adjacent second crossbeams the battery cell module, every the battery cell module includes at least one electric core.

Description

Battery pack and vehicle

Technical Field

The application relates to the technical field of battery energy, in particular to a battery pack and a vehicle.

Background

With the rapid development of electric automobiles, the safety problem of a power battery system of the electric automobile restricts the rapid development of the electric automobile. The battery system of the electric vehicle usually adopts a battery pack formed by stacking a plurality of battery cells, and the capacity of the battery pack determines the cruising ability of the electric vehicle.

In the prior art, the battery pack generally comprises a shell and a plurality of stacked battery cells encapsulated in the shell, the shell generally encapsulates the plurality of battery cells in a tray and a sealing cover, and the strength of the shell with the structure for bearing mechanical vibration is limited, so that the capacity and the size of the battery pack are limited, and the battery pack is not suitable for some large-sized vehicles.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide a new solution for a battery pack and a vehicle.

According to a first aspect of the present application, there is provided a battery pack including: the battery comprises a shell and a battery cell module;

the shell comprises a first tray, a second tray and an upper cover plate which are sequentially arranged from bottom to top, and a first end plate, a second end plate, a first frame and a second frame which are respectively connected with the peripheries of the first tray and the upper cover plate in a sealing manner, wherein the first end plate and the second end plate are oppositely arranged, and the first frame and the second frame are oppositely arranged;

a plurality of first cross beams are sequentially arranged between the first tray and the second tray at intervals along the horizontal direction, and a plurality of second cross beams are sequentially arranged between the second tray and the upper cover plate at intervals along the horizontal direction;

at least between two adjacent first beams and/or two adjacent second beams, be provided with respectively the electricity core module, every electricity core module includes at least one electricity core.

Optionally, two ends of the first cross beam and the second cross beam are respectively provided with a protruding portion, and the first frame and the second frame are respectively provided with an assembling groove corresponding to the protruding portions;

the protruding parts are inserted into the assembling grooves in an inserting mode, and the first cross beam and the second cross beam are connected with the first frame and the second frame in a sealing mode through glue.

Optionally, the first border includes a first upper border and a first lower border, and the second border includes a second upper border and a second lower border; the two ends of the first cross beams are respectively connected with the first lower frame and the second lower frame, and the two ends of the second cross beams are respectively connected with the first upper frame and the second upper frame.

Optionally, the first end plate, the first frame, the second end plate, and the second frame are respectively provided with two layers of sealing strips along respective thickness directions, and the first tray and the upper cover plate are respectively sealed doubly.

Optionally, an exhaust passage is reserved between the battery cell module and the casing, an exhaust hole communicated with the exhaust passage is formed in the first end plate and/or the second end plate, and an explosion-proof valve is arranged in the exhaust hole.

Optionally, still include the block terminal, the block terminal set up in the outside of casing, and with the electricity core module is connected through fast grafting plug-in components electricity.

Optionally, at least two layers of the battery cell modules are arranged between the first tray and the second tray and/or between the second tray and the upper cover plate in the vertical direction.

Optionally, a liquid cooling plate is arranged between the two adjacent layers of the battery cell modules.

Optionally, a pulling plate is arranged between the battery cell module and the upper cover plate, which are close to the upper cover plate, and two ends of the pulling plate are connected with the second beam respectively.

According to a second aspect of the present application, there is provided a vehicle comprising: the battery pack according to the first aspect.

One technical effect of the application lies in: the application provides a battery pack includes casing and electric core module, and the casing includes first tray, second tray and upper cover plate to and respectively with first tray and upper cover plate seal connection's first end plate, second end plate, first frame and second frame all around. Through first tray with interval in proper order between the second tray is provided with a plurality of first crossbeams to and interval in proper order between second tray and upper cover plate is provided with a plurality of second crossbeams, make and all can set up an electricity core module between two adjacent first crossbeams and/or two adjacent second crossbeams.

Above-mentioned this kind of structure makes every electricity core module homoenergetic be banded by first crossbeam and the first tray that is located its both sides, or is banded by the second crossbeam and the second tray that are located its both sides, has strengthened the anti mechanical vibration ability of the inside electric core module of casing for the overall dimension or the internal capacity of battery package further increase, have improved the adaptability of battery package to the electric vehicle of various models.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a battery pack provided in the present application.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic partial structural diagram of a two-layer cell module disposed on a first tray according to the present disclosure.

Fig. 4 is a schematic view of a battery pack with the first rim, the second rim, and the second tray assembled.

Fig. 5 is a schematic view of the connection between the first beam and the second frame.

Wherein: 1. a first tray; 2. a second tray; 3. an upper cover plate; 4. a first end plate; 5. a second end plate; 6. a first frame; 7. a second frame; 8. a first cross member; 9. a second cross member; 10. a battery cell module; 11. a distribution box; 12. an exhaust hole; 13. an explosion-proof valve; 14. a liquid-cooled plate; 15. and (4) a sealing strip.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 5, the present application provides a battery pack including: a shell and a cell module 10; the casing includes first tray 1, second tray 2 and the upper cover plate 3 that sets gradually from bottom to top, and respectively with first tray 1 with upper cover plate 3's all around sealing connection's first end plate 4, second end plate 5, first frame 6 and second frame 7, first end plate 4 with second end plate 5 sets up relatively, first frame 6 with second frame 7 sets up relatively. With the adoption of the structure, the first end plate 4, the second end plate 5, the first frame 6 and the second frame 7 are hermetically enclosed between the first tray 1 and the upper cover plate 3 to form a closed assembly space, and the second tray 2 is positioned between the first tray 1 and the upper cover plate 3 to divide the assembly space into two parts, so that the size of the battery cell module 10 which can be accommodated in the whole shell in the height direction is increased.

In addition, a plurality of first cross beams 8 are sequentially arranged between the first tray 1 and the second tray 2 at intervals along the horizontal direction, and a plurality of second cross beams 9 are sequentially arranged between the second tray 2 and the upper cover plate 3 at intervals along the horizontal direction; at least between two adjacent first beams 8 and/or two adjacent second beams 9, the cell modules 10 are respectively disposed, and each cell module 10 includes at least one cell. When the battery cell module 10 includes more than two battery cells, all the battery cells are sequentially stacked and arranged along the thickness direction, and after the assembly, the large surface of each battery cell faces the first cross beam 8 or the second cross beam 9.

Above-mentioned this kind of structural style for on following the horizontal direction, first crossbeam 8 or second crossbeam 9 can both play certain constraint effect to electric core module 10, make electric core module 10 can fix in the casing and predetermine position department, avoid taking place phenomenons such as vibration friction between electric core module 10, improved the security performance of battery package. In addition, the arrangement of the first cross beam 8 and the second cross beam 9 can also expand the width of the battery pack in the horizontal direction, and the size of the battery pack is increased. The two ends of the first cross beam 8 and the second cross beam 9 can be respectively connected with the first frame 6 and the second frame 7, so that the overall strength of the battery pack shell and the mechanical vibration resistance of the battery pack are enhanced.

In this embodiment, the installation of the battery pack may be performed according to the following steps:

with the first tray 1 as an assembly foundation, the first beams 8 may be welded to the first tray 1, or integrally formed with the first tray 1, and then cells are stacked between adjacent first beams 8 to form a plurality of cell modules 10, referring to fig. 3; then assembling the first frame 6, the second frame 7 and the second tray 2, and the second beams 9 may be welded to the second tray 2 or integrally formed with the second tray 2, referring to fig. 4, stacking the battery cells between the adjacent second beams 9 to form a plurality of battery cell modules 10; and finally, assembling the first end plate 4, the second end plate 5 and the upper cover plate 3, and packaging the plurality of battery cell modules 10 in the shell.

The application provides a casing, its assembly method is simple, nimble, compromises size and two aspects of safe performance demands simultaneously, can enough be applicable to kart, also can be applicable to more large size truck etc. and the suitability is high. The components of the housing may be connected by screws or other connection methods, which is not limited in this application. In addition, the sealing connection between each component can be realized by arranging the sealing strip 15 or coating waterproof glue on the joint, and the application is not limited to this.

Alternatively, referring to fig. 2 to 5, both ends of the first cross beam 8 and the second cross beam 9 are respectively provided with a protruding portion, and the first frame 6 and the second frame 7 are respectively provided with an assembling groove corresponding to the protruding portions; the protruding parts are inserted into the assembling grooves, and the first cross beam 8 and the second cross beam 9 are connected with the first frame 6 and the second frame 7 in a sealing mode through glue.

Specifically, in this embodiment, the end portions of the first cross beam 8 and the second cross beam 9 are both provided with a protruding portion, the end portions of the first cross beam 8 and the second cross beam 9 are respectively opposite to the inner side surfaces of the first frame 6 and the second frame 7, and the first frame 6 and the second frame 7 are provided with an assembly groove matched with the protruding portion corresponding to the protruding portion, so that the first cross beam 8 and the second cross beam 9 can be respectively connected with the first frame 6 and the second frame 7, and the strength of the battery pack case is improved. In addition, glue can be coated between the assembly surfaces of the protruding portion and the assembly groove, on one hand, the connection strength can be improved, on the other hand, a gap between the protruding portion and the assembly groove can be filled, a waterproof sealing effect is achieved, different types of the coated glue can be selected according to the actual use environment, and the application is not limited to this.

Optionally, referring to fig. 1, the first frame 6 includes a first upper frame and a first lower frame, and the second frame 7 includes a second upper frame and a second lower frame; two ends of the plurality of first beams 8 are respectively connected with the first lower frame and the second lower frame, and two ends of the plurality of second beams 9 are respectively connected with the first upper frame and the second upper frame.

Specifically, in this embodiment, set up first frame 6 to including first upper frame and first lower frame, second frame 7 sets up to second upper frame and second lower frame, in the assembling process like this, can be after assembling the electric core module 10 that is located on first tray 1, assemble first lower frame and second lower frame, second tray 2 is assembled again, after assembling the electric core module 10 on the second tray 2, assemble first upper frame and second upper frame after that, this kind of split structure makes the assembly efficiency of battery package higher, in addition, also can in time realize the protection to electric core module 10 after assembling electric core module 10 on first tray 1, avoid electric core module 10 to leak and take place the damage scheduling problem outward, the security performance of battery package has been improved.

Optionally, referring to fig. 5, the first end plate 4, the first frame 6, the second end plate 5, and the second frame 7 are respectively provided with two layers of sealing strips 15 along respective thickness directions, so as to respectively realize double sealing with the first tray 1 and the upper cover plate 3.

Specifically, in this embodiment, two layers of sealing strips 15 are disposed on each component in the respective thickness direction, that is, in the plate thickness direction of the first end plate 4, the first frame 6, the second end plate 5 and the second frame 7, so that the sealing effect of the casing can be improved, part of mechanical vibration force can be absorbed, and the safety performance of the battery pack can be improved.

Optionally, referring to fig. 1 to 2, an exhaust channel is reserved between the battery cell module 10 and the casing, an exhaust hole 12 communicated with the exhaust channel is formed in the first end plate 4 and/or the second end plate 5, and an explosion-proof valve 13 is arranged in the exhaust hole 12.

Specifically, in some embodiments, the inside electric core module 10 that sets up of casing is less, and the heat that produces at the during operation is also less, this moment alright set up exhaust hole 12 on first end plate 4 or second end plate 5 to set up explosion-proof valve 13 in exhaust hole 12, when electric core takes place the thermal runaway, explosion-proof valve 13 opens, can discharge the gas that electric core produced rapidly, avoids the inside atmospheric pressure of battery package too big break through the battery package casing to cause the injury to near personnel. In another embodiment, if the inside electric core module 10 that sets up of casing is more, and electric core is also more at the during operation, and it is also more that it produces, all sets up exhaust hole 12 on first end plate 4 and second end plate 5, sets up explosion-proof valve 13 in the exhaust hole 12, can bigger degree, get rid of the inside electric core of battery package and produce gas more fast, avoid personnel to be injured. The number of the vent holes 12 on the first end plate 4 and the second end plate 5 may be selected according to the actual capacity of the battery pack, and is not limited in this application.

Optionally, referring to fig. 1 to 2, the battery pack further includes a distribution box 11, where the distribution box 11 is disposed outside the casing and electrically connected to the cell module 10 through a quick-plug connector.

Specifically, the distribution box 11 can enable the cell module 10 to externally realize high-low voltage connection of the battery, and the battery pack in the prior art is usually arranged inside the casing, and later maintenance and replacement are troublesome. In this embodiment, the distribution box 11 is disposed outside the casing, and is electrically connected to the battery cell module 10 inside the casing through a pair of quick plug-in connectors, so as to implement the high-low voltage connection function of the battery. By the arrangement mode, when the distribution box 11 breaks down, the distribution box can be taken out integrally and quickly, and maintenance is facilitated.

Optionally, referring to fig. 2 to 3, at least two layers of the cell modules 10 are disposed between the first tray 1 and the second tray 2 and/or between the second tray 2 and the upper cover plate 3 in the vertical direction.

Specifically, in this embodiment, in the vertical direction, at least two layers of battery cell modules 10 may be disposed on the first tray 1, referring to fig. 1 or fig. 3, two layers of battery cell modules 10 are disposed, or at least two layers of battery cell modules 10 are disposed on the second tray 2, or more than two layers of battery cell modules 10 are disposed on both the first tray 1 and the second tray 2, referring to fig. 1, so as to increase the size of the battery pack in the height direction, and specifically, the selection may be performed according to the type of the vehicle to which the battery pack is applied, which is not limited in this application. For example, most of the current trucks have large wheel diameters and large height dimensions, so that the form of the multi-layer cell module 10 can be selected to reasonably utilize the arrangement space. When the cell modules 10 with more than two layers are arranged on the first tray 1 and/or the second tray 2, the same number of layers can be added to the first cross beam 8 and/or the second cross beam 9 in the height direction, and each layer can be connected through screws and the like, so that the constraint force on the cell modules 10 is improved.

Optionally, referring to fig. 2, a liquid cooling plate 14 is disposed between two adjacent layers of the cell modules 10.

Specifically, on the basis of the above-mentioned embodiment, if set up multilayer electricity core module 10 on first tray 1 and/or the second tray 2, set up liquid cooling board 14 between adjacent electricity core module 10 and can cool down or keep warm each electric core fast to improve the security performance of battery package.

Optionally, a pulling plate is arranged between the battery cell module 10 close to the upper cover plate 3 and the upper cover plate 3, and two ends of the pulling plate are respectively connected with the second beam 9.

Specifically, in this embodiment, the upper cover plate 3 and the battery cell module 10 (i.e., the battery cell module 10 on the uppermost layer) close to the upper cover plate 3 are provided with a pulling plate therebetween, and the pulling plate is used for cooperating with the second beam 9, restraining and tensioning each battery cell module 10, so that the structure of the battery cell module 10 on the second tray 2 is more compact. And the cell module 10 on the first tray 1 can be constrained by the second tray 2 and the first cross beam 8. Wherein, the arm-tie can be aluminum plate, can play the guard action to the electric core module 10 that is close to upper cover plate 3.

According to a second aspect of the present application, there is provided a vehicle including the battery pack of the first aspect. The size and the capacity of the battery pack of the first aspect in the application can be designed according to the adaptive vehicle, and the compactness of the whole vehicle is improved.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A battery pack, comprising: the battery comprises a shell and a battery cell module;

2. The battery pack according to claim 1, wherein the first cross member and the second cross member are each provided at both ends thereof with a protruding portion, and the first frame and the second frame are each provided thereon with a fitting groove corresponding to the protruding portion;

the protruding portion is inserted into the assembling groove, and the first cross beam and the second cross beam are connected with the first frame and the second frame in a sealing mode through glue.

3. The battery pack of claim 1, wherein the first frame comprises a first upper frame and a first lower frame, and the second frame comprises a second upper frame and a second lower frame; the two ends of the first cross beams are respectively connected with the first lower frame and the second lower frame, and the two ends of the second cross beams are respectively connected with the first upper frame and the second upper frame.

4. The battery pack of claim 1, wherein the first end plate, the first frame, the second end plate and the second frame are respectively provided with two layers of sealing strips along the respective thickness directions, and the sealing strips are respectively in double sealing with the first tray and the upper cover plate.

5. The battery pack according to claim 1, wherein an exhaust passage is reserved between the battery core module and the casing, an exhaust hole communicated with the exhaust passage is formed in the first end plate and/or the second end plate, and an explosion-proof valve is arranged in the exhaust hole.

6. The battery pack of claim 1, further comprising a distribution box disposed outside the housing and electrically connected to the cell modules via quick-connect plugs.

7. The battery pack according to claim 1, wherein at least two layers of the cell modules are arranged between the first tray and the second tray and/or between the second tray and the upper cover plate in the vertical direction.

8. The battery pack of claim 7, wherein a liquid cooling plate is disposed between two adjacent layers of the cell modules.

9. The battery pack according to claim 7, wherein a pull plate is disposed between the cell module close to the upper cover plate and the upper cover plate, and two ends of the pull plate are respectively connected to the second beam.

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