CN210040349U

CN210040349U - Module shell of battery module, battery module and power battery

Info

Publication number: CN210040349U
Application number: CN201921227405.3U
Authority: CN
Inventors: 刘刚; 唐俊伟; 刘明玲; 王会敏; 熊志江
Original assignee: Thornton New Energy Technology (changsha) Co Ltd
Current assignee: Yuyao Haitai Trading Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-02-07
Anticipated expiration: 2029-07-31

Abstract

The utility model relates to a module shell, battery module and power battery of battery module. The module shell of battery module includes: the shell body comprises a bottom plate and two side plates fixedly connected to one side of the bottom plate, wherein the two side plates are arranged at intervals along a first direction and longitudinally extend along a second direction vertical to the first direction; the two end plates are respectively positioned at the two ends of the bottom plate in the second direction; each end plate includes the end plate body and respectively two bosses of fixed connection in the relative both ends of end plate body, and two bosses of each end plate welded connection respectively in two curb plates to make shell body and two end plates enclose to close and form the holding chamber. So, this application realizes the fixed connection of shell body and two end plates through the welded connection of curb plate and boss, has replaced panel and the direct welded mode of panel among the prior art, has reduceed the risk that the module shell welded, has reduced the deformation of module shell in welding process, has improved welding quality, has strengthened joint strength.

Description

Module shell of battery module, battery module and power battery

Technical Field

The utility model relates to a battery technology field especially relates to a module shell, battery module and power battery of battery module.

Background

New energy automobiles become an integral trend of automobile industry development, and countries all have an intention of forbidding fuel oil automobile sales. In new energy vehicles, most of the new energy vehicles are pure electric vehicles or hybrid electric vehicles which adopt lithium ion batteries as electric energy storage devices and have practical value at present. Because of the characteristics of lithium ion batteries, hard shell batteries with steel shells, aluminum shells and plastic shells generally have potential safety hazards of explosion. The soft package battery has the advantages of high safety, high energy density, long service life and the like, so that the hard shell battery is gradually replaced.

Generally, the soft package core is piled up and is formed the electric core group, and the electric core group is acceptd in the module shell of battery module, plays fixed, protection electric core group etc. effect. However, the existing module shell is formed by splicing plates through a welding process (such as laser welding), the plates are easily welded through and deform greatly in the welding process, the welding effect is poor, and the connection strength cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a battery module housing, a battery module and a power battery, which overcome the above-mentioned disadvantages, in order to solve the problems in the prior art that the plate is easy to be welded and deformed greatly, the welding effect is poor, and the connection strength cannot meet the requirements.

A module case of a battery module, comprising:

the shell body comprises a bottom plate and two side plates fixedly connected to one side of the bottom plate, wherein the two side plates are arranged at intervals along a first direction and longitudinally extend along a second direction vertical to the first direction;

the two end plates are respectively positioned at two ends of the bottom plate in the second direction; each end plate includes the end plate body and respectively fixed connection in two bosses at the relative both ends of end plate body, each two of end plate boss welded connection respectively in two the curb plate, so that the shell body encloses with two the end plate and closes and form a holding chamber.

The module shell of the battery module is enclosed by the two end plates, the bottom plate and the two side plates of the shell body to form an accommodating cavity for accommodating the battery cell group. And set up the boss at the both ends of end plate, utilize boss and the curb plate welded connection that corresponds, realize the equipment of shell body and two end plates. So, this application realizes the fixed connection of shell body and two end plates through the welded connection of curb plate and boss, realizes the equipment of module shell promptly, has replaced panel and the direct welded mode of panel among the prior art to reduce the risk that the module shell welded, reduced the deformation of module shell in welding process, improved welding quality, strengthened joint strength.

In one embodiment, each of the reinforcing blocks has a welding plane for welding connection with the side plates;

the welding plane is parallel to the side plate. So, increased the area of contact of curb plate with the boss, be favorable to further improving welding quality, reinforcing joint strength.

In one embodiment, the two reinforcing blocks of each end plate are located between the two side plates. So, can make module shell structure compacter, be favorable to reducing battery module's volume.

In one embodiment, a cross section of the reinforcing block parallel to the base plate is rectangular.

In one embodiment, the reinforcing block has a through-hole penetrating therethrough in a direction perpendicular to the base plate, the through-hole being used to fixedly mount a battery module. Therefore, the battery module is fixed by the reinforcing block, a fixing structure of the battery module is not required to be additionally arranged, and the structure of the battery module is simplified.

In one embodiment, the bottom plate has a clearance hole or a clearance groove, and the clearance hole or the clearance groove is arranged corresponding to the reinforcing block. Therefore, the bottom plate is prevented from plugging the through hole, and fasteners such as screws cannot be assembled.

In one embodiment, the bottom plate and the two side plates are integrally formed. Therefore, the connecting strength of the module shell is improved, and the assembly process is simplified. And the structure is simple and suitable for mass production.

In one embodiment, the end plate body of the end plate and the two reinforcing blocks are integrally formed. Therefore, the connecting strength of the module shell is improved, and the assembly process is simplified. And the structure is simple and suitable for mass production.

A battery module comprises a battery cell group and the module shell in any embodiment, wherein the battery cell group is accommodated in the accommodating cavity.

A power battery comprises at least one battery module as described in any one of the above embodiments.

Drawings

Fig. 1 is a schematic structural view of a module housing of a battery module according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a housing body of the module housing shown in FIG. 1;

fig. 3 is a schematic structural view of an end plate of the module case shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

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

Fig. 2 shows a structural view of a housing body of the module housing shown in fig. 1. Fig. 3 shows a schematic view of the end plate of the module case shown in fig. 1. For the purpose of illustration, the drawings show only the structures pertinent to the present invention.

As shown in fig. 1, 2 and 3, an embodiment of the present invention provides a module housing of a battery module, which includes a housing body 10 and two end plates 20.

The housing body 10 includes a bottom plate 11 and two side plates 13 fixedly connected to one side of the bottom plate 11. The two side plates 13 are spaced apart in a first direction and extend lengthwise in a second direction perpendicular to the first direction. The two end plates 20 are respectively located at both ends of the bottom plate 11 in the second direction. Each of the end plates 20 includes an end plate body 21 and two reinforcing blocks 23, and the two reinforcing blocks 23 are respectively fixedly connected to opposite ends of the end plate body 21. The two reinforcing blocks 23 of each end plate 20 are welded to the two side plates 13, respectively, so that the housing body 10 and the two end plates 20 enclose a receiving cavity a for receiving the electric core pack 100 of the battery module.

The module housing of the battery module forms an accommodating cavity a for accommodating the battery cell pack 100 by enclosing the two end plates 20, the bottom plate 11 and the two side plates 13 of the housing body 10. Reinforcing blocks 23 are provided at both ends of the end plate 20, and the end plate 20 and the two side plates 13 are fixedly connected by welding the reinforcing blocks 23 to the corresponding side plates 13. So, this application realizes shell body 10 and two end plate 20's equipment through the welded connection of curb plate 13 and boss 23, realizes the equipment of module shell promptly, has replaced panel and the direct welded mode of panel among the prior art to reduce the risk that the module shell was welded and worn, and reduced the deformation of module shell in welding process, and then improved welding quality, increased joint strength.

In the embodiment shown in fig. 1, the first direction is the front-rear direction. The second direction is a left-right direction. The first direction and the second direction are both parallel to the bottom plate 11.

In particular, in the embodiment shown, each reinforcing block 23 has a welding plane 234 for welding connection with the side plate 13 (see fig. 3). The welding plane 234 is parallel to the side plate 13. Therefore, the contact area between the side plate 13 and the reinforcing block 23 is increased, the welding quality is further improved, and the connection strength is enhanced.

In the embodiment shown, the two reinforcing blocks 23 of each end plate 20 are located between the two side plates 13. So, can make module shell structure compacter, be favorable to reducing battery module's volume.

In the embodiment, the cross section of the reinforcing block 23 parallel to the bottom plate 11 is rectangular. So, be favorable to guaranteeing the intensity of boss 23, and then improve the bulk strength of module shell.

In the embodiment of the present invention, the reinforcing block 23 has a through hole 232 penetrating through it in the direction perpendicular to the bottom plate 11, and the through hole 232 is used for fixedly mounting the battery module. That is, the battery module can be fixedly connected to the battery box through the through hole 232, for example, the battery module can be fixedly connected to the battery box by using a fastener such as a screw, and the through hole 232 is used for the fastener such as the screw to pass through. Therefore, the reinforcing block 23 is used for fixing the battery module, a fixing structure of the battery module is not required to be additionally arranged, and the structure of the battery module is simplified.

Alternatively, the through hole 232 may be a kidney-shaped hole. So, be convenient for assemble fasteners such as screw rod, save battery module installation time.

In particular, in the embodiment, the bottom plate 11 has a clearance hole or clearance groove 114 (see fig. 2) corresponding to the reinforcing block 23, so as to prevent the bottom plate 11 from blocking the through hole 232, which may result in that a fastener such as a screw cannot be assembled.

In the embodiment of the present invention, the bottom plate 11 is provided with a plurality of mounting holes 112 for fixedly mounting the electric core assembly 100. In this manner, the fastener can fixedly connect the electric core assembly 100 to the base plate 11 through the mounting hole 112. The fasteners may be screws, bolts, rivets, etc., and are not limited thereto.

In the embodiment of the present invention, the bottom plate 11 and the two side plates 13 of the housing body 10 are integrally formed. Therefore, the connecting strength of the module shell is improved, the assembly process is simplified, and the structure is simple and suitable for mass production. Alternatively, the housing body 10 may be formed by die casting or stamping, etc.

In the embodiment of the present invention, the end plate body 21 and the two reinforcing blocks 23 are integrally formed. Therefore, the connecting strength of the module shell is improved, the assembly process is simplified, and the structure is simple and suitable for mass production. Alternatively, the end plate 20 may be formed by extrusion, casting, die casting, or cutting processes. Preferably, the end plate 20 is an extruded profile.

Based on the module shell of above-mentioned battery module, the utility model discloses still provide a battery module, this battery module includes electric core group 100 and as above in arbitrary embodiment the module shell. The electric core assembly 100 is accommodated in the accommodating cavity of the module housing. It is understood that the battery cell pack 100 is formed by stacking a plurality of battery cells.

In the embodiment, the electric core assembly is fixedly connected to the bottom plate 11 of the casing body 10 through the mounting hole formed on the bottom plate 11.

Based on above-mentioned battery module, the utility model discloses still provide a power battery, this power battery includes at least one as in above arbitrary embodiment the battery module.

In an embodiment, the power battery further comprises a battery box, and at least one battery module is accommodated in the battery box. And the respective battery modules may be electrically connected in series and/or in parallel.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a module shell of battery module which characterized in that includes:

2. The module housing according to claim 1, wherein each of the reinforcing blocks has a welding plane for welding connection with the side plate;

the welding plane is parallel to the side plate.

3. The module housing of claim 1, wherein the two stiffeners of each end plate are located between the two side plates.

4. The module housing according to claim 1, wherein a cross section of the reinforcing block parallel to the bottom plate is rectangular.

5. The module housing according to claim 1, wherein the reinforcing block has a through-hole penetrating therethrough in a direction perpendicular to the base plate, the through-hole being used to fixedly mount a battery module.

6. The module housing according to claim 5, wherein the bottom plate has a clearance hole or a clearance groove provided corresponding to the reinforcing block.

7. The module housing according to any one of claims 1 to 6, wherein the bottom plate and the two side plates are integrally formed.

8. The module housing according to any one of claims 1 to 6, wherein the end plate body of the end plate and the two reinforcing blocks are integrally formed.

9. A battery module comprising a battery cell pack and the module housing according to any one of claims 1 to 8, wherein the battery cell pack is accommodated in the accommodating cavity.

10. A power battery comprising at least one battery module according to claim 9.