CN216529163U

CN216529163U - Battery pack and vehicle

Info

Publication number: CN216529163U
Application number: CN202122979076.1U
Authority: CN
Inventors: 舒元茂; 尤悦丘; 吴艳凤; 郑卫鑫; 鲁志佩
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-13
Anticipated expiration: 2031-11-30

Abstract

The application discloses battery package and vehicle. The battery pack includes: a tray; the beam body is fixed in the tray and provided with a first accommodating area; the first electric core group is fixed in the first accommodating area; the first battery cell group comprises a plurality of battery cells, and the plurality of battery cells are arranged along the length direction of the beam body; the first end of the first electric leading-out part is electrically connected with the first electric core group, and the first end of the second electric leading-out part is electrically connected with the first electric core group; the second end of the first electrical lead-out and the second end of the second electrical lead-out are both located in the same end region of the beam body.

Description

Battery pack and vehicle

Technical Field

The present application relates to the field of battery technology, more specifically, the present application relates to a battery package and vehicle.

Background

The power battery is used as a power source of the new energy automobile, and the quality of the performance of the power battery is crucial to the endurance mileage and the power performance of the new energy automobile. The energy density of a power battery pack (hereinafter referred to as a battery pack) is an important performance index.

In order to increase the energy density of the battery pack, the current method is to directly increase the energy density of a single battery cell in the battery pack. However, this approach does not fully utilize the space of the battery tray, so that the energy density of the battery pack is still relatively low.

In addition, the battery pack mainly comprises a battery pack shell, a battery pack and an electric connection part, wherein the battery pack shell is wrapped on the battery pack, and the electric connection part leads the power of the battery pack out of the battery pack shell. Among the prior art, the mode of arranging of the electric connection portion of battery package is not convenient for realize the electricity with other electric core modules and is connected, has caused the confusion that electric connection portion walked the line in the battery package.

Based on the technical problem, the embodiment of the application provides a novel battery pack.

SUMMERY OF THE UTILITY MODEL

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

According to a first aspect of embodiments herein, there is provided a battery pack. The battery pack includes:

a tray;

the beam body is fixed in the tray and provided with a first accommodating area;

the first electric core group is fixed in the first accommodating area;

the first battery cell group comprises a plurality of battery cells, and the plurality of battery cells are arranged along the length direction of the beam body;

the first end of the first electric leading-out part is electrically connected with the first electric core group, and the first end of the second electric leading-out part is electrically connected with the first electric core group;

the second end of the first electrical lead-out and the second end of the second electrical lead-out are both located in the same end region of the beam body.

Optionally, the first battery cell group further comprises a positive electrode bus bar and a negative electrode bus bar;

the positive electrode of the first electric core group is connected with the first end of the first electric leading-out part through the positive electrode bus bar;

and the negative electrode of the first electric core group is connected with the first end of the second electric leading-out part through the negative electrode bus bar.

Optionally, the beam body includes a top plate and a first side plate and a second side plate connected to the top plate, and the first side plate and the second side plate are arranged oppositely in the width direction of the beam body;

the first side plate is provided with a first through hole, and the first electric leading-out part penetrates through the first through hole and is electrically connected with the first electric core group;

and a second through hole is formed in the second side plate, and the second electric leading-out part penetrates through the second through hole and is electrically connected with the first electric core group.

Optionally, the end region of the beam body is recessed to form a recess;

the second end of the first electrical lead-out part forms a first bent part, the second end of the second electrical lead-out part forms a second bent part, and the first bent part and the second bent part are both located on the recessed part.

Optionally, the tray has a first direction and a second direction, the first direction and the second direction being perpendicular to each other;

the beam bodies are arranged along a second direction of the tray, the tray is divided by the beam bodies to form at least two second accommodation areas, and the two accommodation areas are arranged along a first direction of the tray;

a second electric core group is arranged in the second accommodating area and is arranged along a second direction of the tray;

the second end of the first electric leading-out part is electrically connected with the second electric core group positioned on one side of the beam body;

and the second end of the second electric leading-out part is electrically connected with the second electric core group positioned on the other side of the beam body.

Optionally, the cells are arranged in a single row in the beam body; or

The electric cores are arranged in the beam body in a multi-row mode, and the adjacent electric cores are arranged in a staggered mode in the width direction of the beam body.

Optionally, the size range of the beam body in the width direction thereof is: d is more than or equal to 30mm and less than or equal to 150 mm.

Optionally, the first battery cell group further comprises a casing for accommodating a plurality of battery cells; the shell is fixed in the beam body.

Optionally, a third through hole communicated with the outside is formed in the beam body.

According to a second aspect of embodiments of the present application, a vehicle is provided. The vehicle includes the battery pack according to the first aspect.

One technical effect of the present application is that a battery pack is provided. The first accommodating space of the beam body is used for accommodating the first electric core group. First electric core group is placed at this internal in roof beam, and the rational utilization the space that forms in the roof beam body, the space in the tray can be utilized by electric core module completely, has promoted the energy density of battery package.

In the embodiment of the present application, the second end of the second electrical lead-out portion and the second end of the first electrical lead-out portion are located in the same end region of the beam body, and the first electrical lead-out portion and the second electrical lead-out portion are located at the same end, so as to facilitate electrical connection with other components.

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 shows a structure of a beam body provided with a first electric core set according to an embodiment of the present invention;

fig. 2 is a first exploded view of the beam body with the first electric core set disposed therein according to an embodiment of the present invention.

Fig. 3 is a second schematic structural view illustrating the first electric core set disposed in the beam body according to the embodiment of the present application.

Fig. 4 is an exploded view of the portion of fig. 3.

Fig. 5 is a first structural schematic diagram of a plurality of battery cells arranged in a beam body.

Fig. 6 is a schematic structural diagram ii showing a plurality of battery cells disposed in a beam body.

Fig. 7 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

Description of reference numerals:

1. a tray;

2. a beam body; 20. a top plate; 21. a first side plate; 211. a first through hole; 22. a second side plate; 23. a recessed portion; 231. a bottom surface; 232. a first side surface; 233. a second side surface; 24. a third through hole;

3. a first electric core group; 31. an electric core; 311. an aerogel plate; 32. a housing; 321. an upper cover; 322. a base; 323. a fastener; 324. a first connection portion; 325. a protective cover;

4. a first electrical lead-out; 41. a first bent portion;

5. a second electrical lead-out; 51. a second bent portion;

61. a positive electrode bus bar; 62. a negative electrode bus bar; 63. a copper bar fixing bracket;

7. a structural adhesive layer;

8. and (4) a beam cover plate.

9. The second electric core group.

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 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.

According to a first aspect of the present application, there is provided a battery pack. Referring to fig. 1 to 7, the battery pack includes: tray 1, roof beam body 2, first electric core group 3, first electric extraction 4 and second electric extraction 5.

The beam body 2 is fixed in the tray 1, and the beam body 2 has a first accommodation area. The first electric core group 3 is fixed in the first accommodating area. The first battery pack 3 includes a plurality of battery cells 31, and the plurality of battery cells 31 are arranged along the length direction of the beam body 2. The first end of the first electric leading-out part 4 is electrically connected with the first electric core group 3, and the first end of the second electric leading-out part 5 is electrically connected with the first electric core group 3. The second end of the first electrical lead-out 4 and the second end of the second electrical lead-out 5 are both located in the same end region of the beam body 2.

In the embodiment of the present application, the tray 1 of the battery pack functions as a support beam body 2. For example, the tray 1 includes a bottom plate and a rim connected to the bottom plate. Wherein the bottom plate and the frame enclose a space for accommodating the beam body 2.

In the present embodiment, the beam body 2 has a first accommodation space. For example, the beam body 2 is made of an aluminum alloy. The beam body 2 is formed by extrusion, a first receiving space is formed in the beam body 2 or the beam body 2 is formed by die casting, and the first receiving space is formed in the beam body 2.

In the present example, the first accommodating space of the beam body 2 is used for accommodating the first electric core group 3. First electric core group 3 is placed in roof beam body 2, and the rational utilization has made full use of the space that forms in the roof beam body 2, and the space in the tray 1 can be utilized by electric core group completely, has promoted the energy density of battery package.

Further, in the present embodiment, the first battery cell group 3 includes a plurality of battery cells 31. The first battery cell group 3 is placed in the beam body 2, and the plurality of battery cells 31 are arranged in the length direction of the beam body 2. The plurality of battery cells 31 are arranged in the beam body 2 in the arrangement manner, and the beam body 2 can be too wide without using, so that the beam body 2 does not occupy too much space inside the battery pack, and the assembly of other components (such as the second battery cell group 9 in the following) in the battery pack is not affected.

It should be noted that the first battery cell group 3 includes a plurality of battery cells 31, and the plurality of battery cells 31 are electrically connected. For example, a plurality of battery cells 31 are connected in series, or a plurality of battery cells 31 are connected in parallel, or a plurality of battery cells 31 are connected in a combination of series connection and parallel connection. The embodiment of the present application does not limit the number of the battery cells 31, and only needs to meet the requirements of a user on battery parameters (for example, parameters such as battery pack voltage).

In the present example, the battery pack includes a first electrical lead-out portion 4 and a second electrical lead-out portion 5. Wherein the first electric leading-out part 4 and the second electric leading-out part 5 are both electrically connected with the first electric core group 3. The power of the first electric core group 3 is led out through the first electric leading-out part 4 and the second electric leading-out part 5.

For example, the first electrical lead-out 4 may be a positive lead-out, and the second electrical lead-out 5 may be a negative lead-out; alternatively, the first electrical lead-out portion 4 may be a negative electrode lead-out portion, and the second electrical lead-out portion 5 may be a positive electrode lead-out portion.

In the present embodiment, the first electrical lead-out portion 4 is described as a positive electrode lead-out portion, and the second electrical lead-out portion 5 is described as a negative electrode lead-out portion. The first electric lead-out part 4 is electrically connected with the positive electrode of the first electric core group 3. The second electric lead-out part 5 is electrically connected with the negative electrode of the first electric core group 3.

The second end of the first electrical lead-out 4 is located on an end region of the beam body 2. Wherein the "end region" is defined as: a portion near the edge of the beam body 2 in the length direction of the beam body 2 is an end region of the beam body 2. For example, the first electrical lead-out portion 4 may have a long strip-shaped configuration.

The second end of the second electrical lead-out 5 is located on an end region of the beam body 2. The second end of the second electrical lead-out 5 and the second end of the first electrical lead-out 4 are located in the same end region of the beam body 2.

In the present embodiment, the second end of the second electrical lead-out part 5 and the second end of the first electrical lead-out part 4 are located at the same end region of the beam body 2, so that the first electrical lead-out part 4 and the second electrical lead-out part 5 are electrically connected with other components (for example, the second electric core pack 9 hereinafter). For example, the first electrical leading-out part 4 and the second electrical leading-out part 5 of the first electrical core group 3 in the beam body 2 are positioned in the same end area of the beam body 2, the positive leading-out end and the negative leading-out end of the second electrical core group 9 do not need to be excessively wired in the tray 1, and then the electrical connection between the first electrical leading-out part 4 and the second electrical leading-out part 5 can be realized, so that the phenomenon that the leading-out parts are disordered due to the excessive wiring in the tray 1 is avoided.

In one embodiment, referring to fig. 1 and 2, the first electric core set 3 further includes a positive electrode bus bar 61 and a negative electrode bus bar 62;

the positive electrode of the first electric core group 3 is connected with the first end of the first electric leading-out part 4 through the positive electrode bus bar 61;

the negative electrode of the first electric core group 3 is connected with the first end of the second electric leading-out part 5 through the negative electrode bus bar 62.

In this embodiment, the first electric core group 3 includes a plurality of electric cells 31, and the positive electrodes of the plurality of electric cells 31 are collected on the positive electrode bus bar 61, that is, the positive electrode bus bar 61 is electrically connected with the positive electrode of the first electric core group 3. For example, the positive electrode bus bar 61 is welded to the positive electrode post of each of the cells 31 of the first cell group 3. A first end of the first electrical lead-out portion 4 is electrically connected to the positive electrode bus bar 61. For example, the first end of the first electrical lead-out portion is fixedly connected to the positive electrode bus bar 61 by a fastener. For example, the fasteners may be bolts or the like.

The negative electrodes of the plurality of battery cells 31 are collected on the negative electrode bus bar 62, that is, the negative electrode bus bar 62 is electrically connected with the negative electrodes of the first battery cell group 3. For example, the negative electrode bus bar 62 is welded to the negative electrode post of each of the cells 31 of the first cell group 3. The first end of the second electrical lead portion 5 is electrically connected to the negative electrode bus bar 62. For example, the first end of the second lead portion 5 is fixedly connected to the negative electrode bus bar 62 by a fastener. For example, the fasteners may be bolts or the like.

In an alternative embodiment, the battery pack further comprises a copper bar fixing bracket 63, and the copper bar fixing bracket 63 fixes the positive bus bar 61 and the negative bus bar 62.

In one embodiment, referring to fig. 1 and 2, the beam body 2 includes a top plate 20 and a first side plate 21 and a second side plate 22 connected to the top plate 20, and the first side plate 21 and the second side plate 22 are oppositely disposed in a width direction of the beam body 2.

The first side plate 21 is provided with a first through hole 211, and the first electric leading-out part 4 penetrates through the first through hole 211 to be electrically connected with the first electric core group 3.

A second through hole (not shown) is formed in the second side plate 22, and the second electric leading-out part 5 penetrates through the second through hole to be electrically connected with the first electric core group 3.

In this embodiment, the beam body 2 includes a top plate 20, a first side plate 21, and a second side plate 22. The top plate 20, the first side plate 21 and the second side plate 22 enclose a first receiving space. For example, the top plate 20, the first side plate 21 and the second side plate 22 are integrally formed.

In this embodiment, the first electrical lead-out portion 4 is a positive electrode lead-out portion, and the second electrical lead-out portion 5 is a negative electrode lead-out portion. The first side plate 21 is provided with a first through hole 211, and the first electric leading-out part 4 passes through the first through hole 211 and is electrically connected with the positive electrode of the first electric core group 3. A second through hole is opened in the second side plate 22. The second electric leading-out part 5 passes through the second through hole to be electrically connected with the negative electrode of the first electric core group 3.

In one embodiment, as shown with reference to fig. 1-4, an end region of the beam body 2 is formed with a recess 23;

the second end of the first electrical lead-out portion 4 forms a first bent portion 41, the second end of the second electrical lead-out portion 5 forms a second bent portion 51, and the first bent portion 41 and the second bent portion 51 are both located in the recess 23.

In this embodiment, the first bent part 41 and the second bent part 51 are defined to be located on the recessed part, and the first bent part 41 and the second bent part 51 do not occupy too much space inside the battery pack, and do not affect the assembly of the second electric core pack 9.

In a specific embodiment, the top plate 20 of the girder body 2 is recessed to form a recess 23. The recess 23 includes a first side surface 232, a second side surface 233, and a bottom surface 231, the first side surface 232 and the second side surface 233 being oppositely disposed along a length direction of the beam body 2, the first side surface 232 and the second side surface 233 each being connected to the bottom surface 231.

When the first bent portion 41 and the second bent portion 51 are connected to the second electric core group 9, the first bent portion 41 and the second bent portion 51 may contact the bottom surface 231 of the recess 23 to improve the heat dissipation effect of the first electric lead-out portion 4 and the second electric lead-out portion 5.

Of course, it is also possible that the electric lead-out part of the second electric core set 9 is in contact with the bottom surface 231, and the first bent part 41 and the second bent part 51 are positioned above the electrode lead-out part of the second electric core set 9.

In this embodiment, the top plate 20 of the girder body 2 is concavely formed with a concave portion 23. The recess 23 includes a first side surface 232, a second side surface 233, and a bottom surface 231, the first side surface 231 and the second side surface 233 being oppositely disposed along a length direction of the beam body 2, and the first side surface 232 and the second side surface 233 both being connected to the bottom surface 231.

In one embodiment, referring to fig. 7, the tray 1 has a first direction and a second direction, which are perpendicular to each other.

The beam body 2 is arranged along a second direction of the pallet 1, and the pallet 1 is partitioned by the beam body 2 to form at least two second accommodation areas, which are arranged along the first direction of the pallet 1.

A second electric core group 9 is arranged in the second accommodating area, and the second electric core group 9 is electrically connected with the first electric core group 3; the second electric core group 9 is arranged along the second direction of the tray 1.

The second end of the first electric leading-out part is electrically connected with the second electric core group positioned on one side of the beam body 2.

And the second end of the second electric leading-out part is electrically connected with the second electric core group positioned on the other side of the beam body 2.

In this embodiment, the tray 1 has a first direction and a second direction, wherein the first direction is a length direction of the tray 1 and the second direction is a width direction of the tray 1.

Referring to fig. 7, a girder body 2 is provided on a pallet 1, and the girder body 2 is provided in a width direction of the pallet 1. That is, the longitudinal direction of the beam body 2 coincides with the width direction of the pallet 1.

The beam body 2 is arranged in the tray 1, and divides the accommodating space in the tray 1 into two second accommodating spaces. The second accommodating space is used for accommodating the second electric core group 9. The second electric core groups 9 are arrayed along the second direction of the tray 1. The second battery pack 9 may be a blade battery.

In this embodiment, the plurality of battery cells 31 in the first battery cell group 3 are arranged along the length direction of the beam body 2, that is, the plurality of battery cells 31 in the first battery cell group 3 are arranged along the width direction of the tray 1, that is, the length direction of the first battery cell group 3 is consistent with the width direction of the tray 1; the second electric core groups 9 are arrayed along the width direction of the tray 1. Namely, the length direction of the second electric core group 9 is consistent with the length direction of the tray 1. This kind of mode of arranging of first electric core group 3 and second electric core group 9 has rationally utilized the accommodation space in the tray 1, has promoted the energy density of battery package. In addition, the arrangement modes of the first electric core group 3 and the second electric core group 9 improve the structural strength of the interior of the battery pack.

In this embodiment, the second end of the first electric lead-out part 4 is electrically connected with the first electric lead-out part of the second electric core group 9 positioned at one side of the beam body 2, and the second end of the second electric lead-out part 5 is electrically connected with the second electric lead-out part of the second electric core group 9 positioned at the other side of the beam body 2, so that the first electric core group 3 and the second electric core group 9 are electrically connected.

In one embodiment, the safety of the second electric core set 9 is greater than the safety of the first electric core set 3. Specifically, this application links together the battery package with the electric core 31 module that two kinds of security are different, and two kinds of different electric core 31 modules dominant exterior compensate each other, have balanced the security of battery package, have promoted the duration of a journey ability of battery package.

Be provided with first electric core group 3 and second electric core group 9 in this application battery package, the security of second electric core group 9 is greater than the security of first electric core group 3. Even first electric core group 3 takes place the thermal runaway phenomenon, because this application sets up first electric core group 3 in the roof beam body 2 of tray 1, roof beam body 2 plays protection and restraint effect to first electric core group 3, and the heat that first electric core group 3 produced can not quick conduction to second electric core group 9, has avoided first electric core group 3 to cause the safety risk to second electric core group 9.

In one embodiment, referring to fig. 5 and 6, a plurality of the battery cells 31 are arranged in a single row in the beam body 2; or a plurality of the battery cells 31 are arranged in a plurality of rows in the beam body 2, and the adjacent battery cells 31 are arranged in a staggered manner in the width direction of the beam body 2.

In this embodiment, referring to fig. 5, a plurality of battery cells 31 are placed in the beam body 2, and the plurality of battery cells 31 are placed in a single row in the beam body 2. At this moment, the size of the beam body 2 in the width direction is basically consistent with the radial size of the battery core 31, the beam body 2 in the width direction can be set without being too wide, more second accommodating spaces are reserved for accommodating the second battery core group 9, and the energy density of the battery pack is improved.

Referring to fig. 6, a plurality of cells 31 are arranged in three rows in the beam body 2. Specifically, the adjacently disposed rows include a first row and a second row, and the first row and the second row are adjacently disposed in the width direction of the beam body 2. The battery cells 31 in the first row are staggered with the battery cells 31 in the second row. A plurality of electric cores 31 adopt this kind of mode to arrange in roof beam body 2, rational utilization the interior first accommodation space of roof beam body 2, under the certain condition of first accommodation space's volume, can place more first electric core group 3 in roof beam body 2, promoted the energy density of battery package.

In one embodiment, the beam body 2 has a size range in its width direction of: d is more than or equal to 30mm and less than or equal to 150 mm.

The size of the beam body 2 in the width direction is limited in the embodiment, and the beam body 2 can not occupy too much accommodating space inside the battery pack, and does not affect the assembly of the second electric core group 9. If the size of the beam body 2 in the width direction is small, the first accommodating space in the beam body 2 is not enough to accommodate the first electric core group 3, and the first accommodating space formed in the beam body 2 is wasted. If the size of the beam body 2 in the width direction is large, the beam body 2 occupies too much accommodating space in the battery pack, and the arrangement of the second battery pack 9 is influenced.

In one embodiment, as shown in fig. 2 to 4, the battery cell 31 is a cylindrical battery cell or a square-shell battery cell.

Specifically, the first battery cell group 3 is connected by a plurality of battery cells 31 in a serial or parallel manner or a combination of serial and parallel. The battery cell 31 may be a cylindrical battery cell, or a square-shell battery cell. For example, the battery cell 31 is a ternary lithium cylindrical battery cell, or the battery cell 31 is a ternary lithium square-shell battery cell.

In one embodiment, referring to fig. 2, the battery cell 31 module further includes a casing 32 accommodating a plurality of battery cells 31; the housing 32 is fixed in the beam body 2.

In one embodiment, referring to FIG. 2, the housing 32 includes an upper cover 321 and a base 322. Wherein the upper cover 321 and the base 322 are connected by fasteners 323. The upper cover 321 and the base 322 enclose a space for accommodating the cylindrical battery cell. Wherein the fasteners 323 may be bolts or the like.

The housing 32 is fixed inside the girder body 2. In this embodiment, a first connecting portion 324 is provided on the base 322, a second connecting portion corresponding to the first connecting portion 324 is provided on the beam body 2, and the housing 32 is fixed in the beam body 2 by the cooperation of the first connecting portion 324 and the second connecting portion. For example, the first connecting portion 324 is a bolt and the second connecting portion is a nut.

Further, still include structural adhesive layer 7 in the battery package, casing 32 passes through structural adhesive layer 7 to be fixed on roof beam body 2, in use, has avoided casing 32 to produce the condition of displacement in roof beam body 2.

In this embodiment, the positive bus bar 61 is connected to the base 322 by a snap-fit manner, and the positive bus bar 61 is located below the base 322; the negative bus bar 62 is connected with the base 322 in a snap-fit manner, and the negative bus bar 62 is located under the base 322.

In this embodiment, the housing 32 fitted with the battery cell 31 is located inside the beam body 2, and the beam cover plate 8 is provided on the beam body 2 to seal the first accommodation space.

Referring to fig. 3 and 4, the housing 32 includes an upper cover 321 (the upper cover 321 may be a plastic fixing bracket), a base 322, and a protection cover 325. The tip of square shell electricity core utilizes the buckle location of plastic fixed bolster to place in base 322 in, injects the low density in base 322 and glues the back, covers at the plastic fixed bolster and establishes visor 325 to wait that the low density structure glues and solidify. The shell 32 after the structural adhesive is solidified is fastened in the beam body 2 through 4 screws at two ends.

In one embodiment, the battery cell 31 is a cylindrical battery cell, and a plurality of sub-accommodation cavities are formed in the casing 32, wherein the structure of the sub-accommodation cavities matches with the structure of the cylindrical battery cell.

In this embodiment, the cell 31 is a cylindrical cell. A plurality of sub-containing cavities are formed in the housing 32, and cylindrical cells are placed in the sub-containing cavities. In this embodiment, the sub-receiving cavity is a cylindrical cavity, and the structure of the sub-receiving cavity is matched with that of the cylindrical battery cell, so that the internal space of the shell 32 is fully utilized by the cylindrical battery cell; in addition, the sub-containing cavity can limit the cylindrical battery cell, and the cylindrical battery cell is prevented from shaking in the shell 32 in the driving process of the vehicle.

In one embodiment, referring to fig. 4, the battery cell 31 is a square-shell battery cell, and an aerogel plate 311 is disposed between two adjacent square-shell battery cells.

In this embodiment, the battery cell 31 is a square-shell battery cell, and an aerogel plate 311 is disposed between two adjacent square-shell battery cells. The aerogel plate 311 can play a role in heat insulation and mechanical force buffering, and the service life of the square-shell battery cell 31 is prolonged.

In one embodiment, referring to fig. 3, the beam body 2 is provided with a third through hole 24 communicating with the outside.

In this embodiment, a third through hole 24 communicating with the outside is formed in the beam body 2, and the third through hole 24 is used for smoke evacuation and pressure relief. For example, the first electric core group 3 has poor safety, and the first electric core group 3 is arranged in the beam body 2. When the thermal runaway phenomenon appears in first electric core group 3, can be through the flue gas discharge with first electric core group 3 production with the third through-hole 24 of external intercommunication to carry out the pressure release to first electric core group 3.

According to a second aspect of embodiments of the present application, a vehicle is provided. The vehicle includes the battery pack of the first aspect. For example, the vehicle can be a pure electric vehicle or a hybrid vehicle such as a car, a passenger car and a truck, and the application improves the use safety of the vehicle.

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:

a tray (1);

the beam body (2), the beam body (2) is fixed in the tray (1), and the beam body (2) is provided with a first accommodating area;

the first electric core group (3), the first electric core group (3) is fixed in the first accommodation area;

the first battery core group (3) comprises a plurality of battery cells (31), and the battery cells (31) are arranged along the length direction of the beam body (2);

the first end of the first electric leading-out part (4) is electrically connected with the first electric core group (3), and the first end of the second electric leading-out part (5) is electrically connected with the first electric core group (3);

the second end of the first electric lead-out part (4) and the second end of the second electric lead-out part (5) are both located in the same end region of the beam body (2).

2. The battery pack according to claim 1, wherein the first electric core group (3) further comprises a positive electrode bus bar (61) and a negative electrode bus bar (62);

the positive electrode of the first electric core group (3) is connected with the first end of the first electric leading-out part (4) through the positive electrode bus bar (61);

the negative electrode of the first electric core group (3) is connected with the first end of the second electric leading-out part (5) through the negative electrode bus bar (62).

3. The battery pack according to claim 1, wherein the beam body (2) includes a top plate (20) and a first side plate (21) and a second side plate (22) connected to the top plate (20), the first side plate (21) and the second side plate (22) being disposed opposite to each other in a width direction of the beam body (2);

the first side plate (21) is provided with a first through hole (211), and the first electric leading-out part (4) penetrates through the first through hole (211) and is electrically connected with the first electric core group (3);

and a second through hole is formed in the second side plate (22), and the second electric leading-out part (5) penetrates through the second through hole to be electrically connected with the first electric core group (3).

4. A battery pack according to claim 3, wherein the end region of the beam body (2) is concavely formed with a concave portion (23);

the second end of the first electrical lead-out part (4) forms a first bent part (41), the second end of the second electrical lead-out part (5) forms a second bent part (51), and the first bent part (41) and the second bent part (51) are both located in the recessed part (23).

5. The battery pack according to claim 1, wherein the tray (1) has a first direction and a second direction, the first direction and the second direction being perpendicular to each other;

the beam bodies (2) are arranged along a second direction of the pallet (1), the pallet (1) is divided by the beam bodies (2) to form at least two second accommodation areas, and the two accommodation areas are arranged along the first direction of the pallet (1);

a second electric core group (9) is arranged in the second accommodating area, and the second electric core group (9) is arranged along a second direction of the tray (1);

the second end of the first electric leading-out part is electrically connected with the second electric core group positioned on one side of the beam body (2);

the second end of the second electric leading-out part is electrically connected with the second electric core group positioned on the other side of the beam body (2).

6. The battery pack according to claim 1, wherein a plurality of the cells (31) are arranged in a single row within the beam body (2); or

The battery cells (31) are arranged in the beam body (2) in a multi-row mode, and the adjacent battery cells (31) are arranged in a staggered mode in the width direction of the beam body (2).

7. The battery pack according to claim 1, wherein the beam body (2) has a size range in its width direction of: d is more than or equal to 30mm and less than or equal to 150 mm.

8. The battery pack according to claim 1, wherein the first battery cell group (3) further comprises a casing (32) accommodating a plurality of the battery cells (31);

the shell (32) is fixed in the beam body (2).

9. The battery pack according to claim 1, wherein the beam body (2) is provided with a third through hole (24) communicating with the outside.

10. A vehicle, characterized in that the vehicle comprises a battery pack according to any one of claims 1-9.