CN111864127A

CN111864127A - Battery box for vehicle, assembling method of battery box and vehicle

Info

Publication number: CN111864127A
Application number: CN201910320081.6A
Authority: CN
Inventors: 韩金娥; 樊春梅; 吴鸿雯; 张范辉; 尤留冬
Original assignee: Peugeot Citroen Automobiles SA
Current assignee: PSA Automobiles SA
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-10-30
Anticipated expiration: 2039-04-19
Also published as: FR3095168A3; FR3095168A1; CN111864127B; FR3095168B3

Abstract

The invention relates to the technical field of vehicle parts, in particular to a battery box for a vehicle, an assembling method of the battery box and the vehicle. This battery case includes: a housing; a first laterally inner component and a first laterally outer component; and a second laterally inner assembly and a second laterally outer assembly disposed laterally inboard and outboard, respectively, of the second lateral sidewall, wherein each of the first laterally inner assembly and the second laterally outer assembly includes: a supporter having a stepped portion supporting the battery module, and an upper vertical portion vertically extending upward from an outer edge of the stepped portion and a lower vertical portion vertically extending downward from an inner edge of the stepped portion; and a connecting member vertically disposed and having an inner side connected to the upper vertical portion of the supporting member and an outer side connected to an inner side of a corresponding one of the first and second lateral side walls, wherein a plurality of through holes corresponding to the connecting member are opened on the lower vertical portion to implement connection of the connecting member to the inner side of the corresponding lateral side wall through the plurality of through holes.

Description

Battery box for vehicle, assembling method of battery box and vehicle

Technical Field

The invention relates to the technical field of vehicle parts, in particular to a battery box for a vehicle, an assembling method of the battery box and the vehicle.

Background

An electric vehicle is a vehicle that uses electric power of an on-vehicle rechargeable battery as a power source or as one of the power sources. The electric vehicle has the advantages of zero emission, zero pollution and small environmental impact, and a new energy vehicle is being rapidly developed and developed.

Rechargeable batteries used in electric vehicles are generally mounted on a battery box. The battery case is assembled by welding a plurality of elements. In the welding, it is necessary to sequentially weld the respective components in order of their positions, because in the prior art, it is generally necessary to assemble the battery case through three stations. Since each station requires a large amount of material and human resources, a battery case and an assembling method thereof capable of reducing the number of stations required for assembly are required to simplify the assembly process and reduce the manufacturing cost.

Disclosure of Invention

Technical problem to be solved

The first object of the present invention is: the battery box and the assembling method thereof can be assembled through two stations and meet performance requirements, and the problems that in the prior art, the number of assembling stations of the battery box is large, the assembling process is complex and the cost is high are solved.

The second object of the present invention is: the utility model provides a vehicle of battery case that includes and can assemble and satisfy the performance requirement through two stations to solve battery case equipment station more among the prior art, the assembly process is complicated and the higher problem of cost.

(II) technical scheme

In order to solve the above technical problems, in one aspect, the present invention provides a battery pack for a vehicle, including: a housing formed in a box shape having an opening and having a first lateral sidewall at a proximal end, a second lateral sidewall at a distal end, and first and second longitudinal sidewalls connected between the first and second lateral sidewalls; a first laterally inner component and a first laterally outer component disposed laterally inboard and outboard, respectively, of the first lateral sidewall; and a second laterally inner assembly and a second laterally outer assembly disposed laterally inboard and outboard, respectively, of the second lateral sidewall, wherein each of the first laterally inner assembly and the second laterally outer assembly includes: a supporter having a stepped portion supporting the battery module, and an upper vertical portion vertically extending upward from an outer edge of the stepped portion and a lower vertical portion vertically extending downward from an inner edge of the stepped portion; and a connecting member vertically disposed and having an inner side connected to the upper vertical portion of the supporting member and an outer side connected to an inner side of a corresponding one of the first and second lateral side walls, wherein a plurality of through holes corresponding to the connecting member are opened on the lower vertical portion to implement connection of the connecting member to the inner side of the corresponding lateral side wall through the plurality of through holes.

According to a preferred aspect of the above aspect, the plurality of through holes are arranged laterally uniformly on the lower vertical portion.

According to a preferred aspect of the above aspect, the first laterally outer assembly includes a first laterally outer assembly body and side brackets provided at both ends of the first laterally outer assembly body, respectively, and connected to the first longitudinal side wall and the second longitudinal side wall at both ends of the first laterally side wall.

According to the above aspect, the first transverse outer assembly body is provided at both ends with side-through holes respectively corresponding to the respective side brackets, so as to implement connection of the respective side brackets to the first longitudinal side wall and the second longitudinal side wall at both ends of the first transverse side wall through the side-through holes.

According to the preferable aspect of the above aspect, the method further comprises: a first bottom member horizontally spanning the bottom of the housing proximal end and the bottom of the first laterally outer assembly body to simultaneously connect the bottom of the housing proximal end and the first laterally outer assembly body; and a second bottom member horizontally spanning the bottom of the distal end of the housing and the bottom of the second laterally outward component to simultaneously connect the bottom of the distal end of the housing and the second laterally outward component.

According to the preferable aspect of the above aspect, the method further comprises: a first side member longitudinally disposed outboard of the first longitudinal side wall; and a second side member disposed longitudinally outboard of the second longitudinal side wall.

Preferably, the method further comprises the step of connecting a third transverse component and a fourth transverse component parallel to the first transverse inner component and the second transverse inner component between the first longitudinal sidewall and the second longitudinal sidewall, wherein the third transverse component and the fourth transverse component are spaced apart and located between the first transverse inner component and the second transverse inner component.

According to a preferred aspect of the above aspect, fastening holes through which fasteners pass to fasten the battery module are provided on the step of the support of each of the first and second lateral inner assemblies and the third and fourth lateral assemblies.

Another aspect of the present invention provides a method for assembling the battery case, including:

forming a first laterally inner assembly and a second laterally inner assembly by fixing the connectors to the upper vertical portions of the supports, and forming a first laterally outer assembly by fixing the side brackets to both ends of the first laterally outer assembly body, respectively; simultaneously welding a welding gun to the connector of the first transverse inner assembly, the first transverse outer assembly body of the first transverse outer assembly and the connector of the second transverse inner assembly, the second transverse outer assembly to the second transverse sidewall through a plurality of through holes on the lower vertical portion of the support, and welding the side brackets to the first longitudinal sidewall and the second longitudinal sidewall at both ends of the first transverse sidewall through side-through holes, respectively; and mounting the first bottom member, the second bottom member, the first side member, and the second side member.

Still another aspect of the present invention provides a vehicle including the battery pack described above.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

in one aspect, the present invention provides a battery pack for a vehicle, including: a housing formed in a box shape having an opening and having a first lateral sidewall at a proximal end, a second lateral sidewall at a distal end, and first and second longitudinal sidewalls connected between the first and second lateral sidewalls; a first laterally inner component and a first laterally outer component disposed laterally inboard and outboard, respectively, of the first lateral sidewall; and a second laterally inner assembly and a second laterally outer assembly disposed laterally inboard and outboard, respectively, of the second lateral sidewall, wherein each of the first laterally inner assembly and the second laterally outer assembly includes: a supporter having a stepped portion supporting the battery module, and an upper vertical portion vertically extending upward from an outer edge of the stepped portion and a lower vertical portion vertically extending downward from an inner edge of the stepped portion; and a connecting member vertically disposed and having an inner side connected to the upper vertical portion of the supporting member and an outer side connected to an inner side of a corresponding one of the first and second lateral side walls, wherein a plurality of through holes corresponding to the connecting member are opened on the lower vertical portion to implement connection of the connecting member to the inner side of the corresponding lateral side wall through the plurality of through holes. Therefore, compared with the assembly process that the connecting piece is welded on the side wall of the shell in one station and then the supporting piece is welded on the connecting piece in the next station in the prior art, the battery box and the assembly method thereof provided by the invention can fix the connecting piece on the supporting piece before the battery box is assembled, and because the supporting piece is provided with a plurality of through holes, when a first transverse inner assembly and a first transverse outer assembly formed by connecting the connecting piece and the supporting piece are welded on the shell, a welding gun can weld the connecting piece on the first transverse inner assembly and the first transverse outer assembly on the shell on the side wall of the shell through the through holes. This can reduce the number of stations required to assemble the battery case. And the cost is lower when the connecting piece is fixed on the supporting piece before the assembly than when a station is added. And the performance of the battery box and the battery mounted on the battery box is not influenced due to the through holes. Therefore, the battery box provided by the invention can meet the performance requirement, and meanwhile, the number of assembly stations is reduced, and the assembly process and steps are simplified, so that the production cost is reduced.

Drawings

FIG. 1 is a schematic view of a battery pack according to the prior art;

fig. 2 is a schematic view illustrating an assembly process of a battery case according to the prior art;

FIGS. 3A-3J are schematic views of a battery cartridge and its components according to the present invention;

FIG. 4A is a schematic illustration of an installation process for a first laterally inner assembly and a first laterally outer assembly according to the present invention;

FIG. 4B is a schematic illustration of a cross-section along A-A of an installation process of a first laterally inner assembly and a second laterally outer assembly according to the present invention;

FIG. 5A is a schematic illustration of an installation process for a second laterally inner assembly and a second laterally outer assembly according to the present invention;

FIG. 5B is a schematic illustration of a cross-section along B-B of an installation process of a second laterally inner assembly and a second laterally outer assembly, in accordance with the present invention;

FIG. 6A is a schematic illustration of an installation process of a side bracket according to the present invention;

FIG. 6B is a schematic illustration of a cross-section along C-C of the installation process of the side bracket according to the present invention;

fig. 7 is a schematic view illustrating an assembly process of a battery case according to the present invention.

In the figure: 1000: a battery case; 3000: a first intermediate; 5000: a second intermediate;

2000: a battery case; 4000: a first intermediate; 10: a housing; 10-1: a first lateral sidewall; 10-2: a second lateral sidewall; 10-3: a first longitudinal side wall; 10-4: a second longitudinal side wall; 20: a first side member; 40: a second side member; 30: a first bottom member; 50: a second bottom member; 300: a first laterally inner component; 400: a first laterally outward component; 500: a second laterally inner component; 600: a second laterally outward component; 700: a third transverse assembly; 900: a fourth transverse assembly; 310. 510: a support member; 320. 520, the method comprises the following steps: a connecting member; 311. 511: a step portion; 312. 512: an upper vertical portion; 313. 513: a lower vertical portion; TH: a through hole; STH: a side-via; FH: a fastening hole; 410: a first transverse outer assembly body; 420: a side bracket; WG: a welding gun; BOLT: a bolt; 321. 315: connecting holes; 314. 720 and 730: flanging; 410-1: a middle portion; 410-2: a lateral end portion; 411: a binding face; 421: a first side; 422: a second face; 710: a horizontal plane.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

For convenience of description, a constricted end of the battery case near the reader is defined as a proximal end, and the other end opposite to the proximal end is defined as a distal end in the present invention; and the term "inner" as used herein means pointing to the center of the battery case and the term "outer" as used herein means pointing from the center of the battery case to the proximal end, distal end, and both sides of the battery case; the "longitudinal" direction in the present application means in the direction of the length of the battery cassette, i.e. from the proximal end towards the distal end or from the distal end towards the proximal end of the battery cassette, and the "transverse" direction in the present application means perpendicular to the "longitudinal" direction, see in particular fig. 1.

The present invention provides a battery cartridge 2000 for a vehicle, as shown in fig. 3A, the battery cartridge 2000 including a case 10 and a first laterally inner assembly 300, a first laterally outer assembly 400, a second laterally inner assembly 500, a second laterally outer assembly 600, a third laterally assembly 700, a fourth laterally assembly 900, a first side member 20, a second side member 40, a first bottom member 30, and a second bottom member 50 assembled to the case 10.

Wherein the first lateral inner assembly 300, the third lateral assembly 700, the fourth lateral assembly 900 and the second lateral assembly 500 are sequentially disposed in parallel in the case 10, the first lateral inner assembly 300 is located at the proximal end of the battery case 2000, then the third lateral assembly 700 and the fourth lateral assembly 900 are sequentially disposed, and the second lateral inner assembly 500 is located at the distal end of the battery case 2000. The battery modules are overlapped and fixed between each adjacent two of the first, third, fourth, and second lateral

inner assemblies

300, 700, 900, and 500, respectively.

The respective constituent elements of the battery cartridge 2000 will be described in detail below with reference to fig. 3B to 3I.

Fig. 3B shows the structure of the case 10 of the battery pack 2000 according to the present invention. Referring to fig. 3B, the case 10 has a box shape having an opening, i.e., the case 10 has a bottom 10-5 and a first lateral sidewall 10-1, a first longitudinal sidewall 10-2, a second lateral sidewall 10-3, and a second longitudinal sidewall 10-4 provided at the edge of the bottom 10-5 and extending upward. The first lateral side wall 10-1, the first longitudinal side wall 10-2, the second lateral side wall 10-3, and the second longitudinal side wall 10-4 are sequentially connected to form a closed loop. As described above, the first lateral side wall 10-1 is located at the proximal end of the battery case 2000 and is disposed laterally between the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4, and the second lateral side wall 10-3 is located at the distal end of the battery case 2000 and is disposed laterally between the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4. The first and second lateral sidewalls 10-1 and 10-3 are substantially parallel, the first and second longitudinal sidewalls 10-2 and 10-4 are substantially parallel, and the first and second longitudinal sidewalls 10-2 and 10-4 are substantially perpendicular to the first and second lateral sidewalls 10-1 and 10-3, respectively.

The proximal end of the battery compartment 2000 is a constricted end, i.e. the proximal end of the battery compartment 2000 has a width that gradually decreases from the third transverse element 700 to the first transverse side wall 10-1. Accordingly, the first and second longitudinal side walls 10-2 and 10-4 are connected to the first lateral side wall 10-1 at a proximal end position of the battery case 2000 by a bent portion bent inward.

Fig. 3C shows the structure of the first lateral inner assembly 300 of the battery case 2000. Referring to FIG. 3A, a first laterally inner assembly 300 is disposed laterally inboard of the first lateral sidewall 10-1. Referring to fig. 3C, the first laterally inner assembly 300 includes a support 310 and a connector 320. Specifically, the support 310 has a stepped portion 311 for supporting the battery module, and an upper vertical portion 312 extending upward from an outer edge of the stepped portion 311 and a lower vertical portion 313 extending downward from an inner edge of the stepped portion 311.

Specifically, the extended free end of the lower vertical portion 313 has a flange 314, the flange 314 may be horizontally disposed to fit the bottom 10-5 of the housing 10, and the lower vertical portion 313 may be fixed to the bottom 10-5 of the housing 10 by the flange 314. A plurality of through holes TH are provided on the lower vertical portion 313, and are preferably arranged on the lower vertical portion 313 in a lateral and evenly distributed manner. The through holes TH are for allowing the welding gun to pass through so as to weld the connection member 320 behind the through holes TH, and thus each through hole TH corresponds to one welding point. Such a transverse and evenly distributed arrangement of the through holes TH may form welding spots evenly distributed in the transverse direction to the connection members 320 behind the lower vertical portion 313, which may form an even fixing force. Thus, the density of the soldering points of the connector 320 can be increased by increasing the number of the through holes TH to increase the fixing strength of the connector 320. The battery case 2000 according to an embodiment of the present invention provides 5 through holes TH that are uniformly distributed in the lateral direction.

The stepped part 311 has a horizontal step to form a flat surface that can overlap the battery module. Specifically, the step part 311 is provided with fastening holes FH through which fastening members can pass and be fastened to the battery module overlapping the step part 311. Specifically, the fastening member may be a BOLT, and a fastening hole or a stud BOLT corresponding to the BOLT may be provided at a corresponding position of the battery module, the BOLT passes through the fastening hole FH on the stepped portion and further passes through a corresponding fastening hole FH on the battery module and then is fastened with a nut and fixed, or the BOLT passes through the fastening hole FH on the stepped portion and then is fastened into a corresponding stud BOLT on the battery module to be fastened and fixed.

The upper vertical portion 312 has a vertical shape, and the outside is connected with the connection member 320. Specifically, the upper vertical portion 312 is provided with a coupling hole 315, and the coupling member 320 is provided with a coupling hole 321 corresponding to the coupling hole 315, and when the coupling member 320 is fitted to the upper vertical portion 312 and the relative position thereof is adjusted such that the coupling hole 321 of the coupling member 320 and the coupling hole 315 of the upper vertical portion 312 are aligned, the fastening connection may be performed by a standard member.

According to the embodiment, the connection member 320 is formed in a plate-shaped structure and is vertically disposed, wherein an upper portion of the connection member 320 is fixed on the upper vertical portion 312 of the support member 310 by fitting an inner side thereof to an outer side of the upper vertical portion 312 of the support member 310, and a lower portion of the connection member 320 is formed to extend downward in parallel to the lower vertical portion 313 of the support member 310 and to correspond to the lower vertical portion 313 of the support member 310. Specifically, the lower portion of the connector 320 corresponds to the through hole TH on the lower vertical portion 313, so that the welding gun passing through the through hole TH can perform a welding work with respect to the lower portion of the connector 320 corresponding to the through hole TH. The "upper portion" described herein refers to a portion of the connection member 320 fixedly coupled to the upper vertical portion 312 of the support member 310, and the "lower portion" refers to a portion of the connection member 320 opposite to the "upper portion", i.e., a portion of the connection member 320 other than the "upper portion". The outer side of the lower portion of the connection member 320 is connected to the inner side of the first lateral side wall 10-1, as shown in fig. 3A. Thereby, the inner side of the upper portion of the connection member 320 is connected with the upper vertical portion 311 of the support member 310, and the outer side of the lower portion of the connection member 320 is connected with the inner side of the first lateral side wall 10-1, so that the support member 310 can be fixed to the inner side of the first lateral side wall 10-1 by the connection member 320, so that the battery module can be overlapped and fixed on the step portion 311 of the support member 310. As described above, the connecting member 320 is provided with the connecting hole 321 for connecting it with the connecting hole 315 on the upper vertical portion 312 and by a fastener. The battery case 2000 according to the embodiment of the present invention provides two connection holes 315 arranged laterally symmetrically.

Fig. 3D shows the structure of a second lateral inner assembly of the battery 2000 of the present invention. Referring to FIG. 3A, a second laterally inner assembly 500 is disposed laterally inboard of the second lateral sidewall 10-3. Referring to fig. 3C, the second laterally inner assembly 500 includes a support 510 and a connector 520. Specifically, the support 510 has a stepped portion 511 for supporting the battery module, and an upper vertical portion 512 extending upward from an outer edge of the stepped portion 511 and a lower vertical portion 513 extending downward from an inner edge of the stepped portion 511.

Specifically, the extended free end of lower vertical portion 513 has a flange 514, and flange 514 may be horizontally disposed to fit against bottom 10-5 of housing 10, and lower vertical portion 513 may be fixed to bottom 10-5 of housing 10 by flange 314. A plurality of through holes TH are provided on the lower vertical portion 513, and are preferably arranged on the lower vertical portion 313 in a lateral and evenly distributed manner. The through holes TH are for allowing the welding gun to pass through so as to weld the connection member 520 behind the through holes TH, and thus each through hole TH corresponds to one welding point. Such a transverse and evenly distributed arrangement of the through holes TH may form welding spots evenly distributed in the transverse direction to the connection members 520 behind the lower vertical portion 513, which may form an even fixing force. Thus, the density of the solder points of the connector 520 can be increased by increasing the number of the through holes TH to increase the fixing strength of the connector 520. The battery case 2000 according to an embodiment of the present invention provides 10 through holes TH which are uniformly distributed in the lateral direction. According to an embodiment of the present invention, the pitch between the through holes TH on the support 510 of the first laterally inner assembly 300 may be equal to the pitch between the through holes TH on the support 520 of the second laterally inner assembly 500. The same pitch may provide the same pitch of the solder joint, and thus may provide the same strength of the solder joint. The number of the through holes TH may be adjusted accordingly according to the length of the

support

310, 510.

The stepped part 511 has a horizontal step to form a flat surface that can overlap the battery module. Specifically, the stepped part 511 is provided with fastening holes FH through which fastening members can pass and be fastened to the battery module overlapping the stepped part 511. Specifically, the fastening member may be a BOLT, and a fastening hole or a stud BOLT corresponding to the BOLT may be provided at a corresponding position of the battery module, the BOLT passes through the fastening hole FH on the stepped portion and further passes through a corresponding fastening hole FH on the battery module and then is fastened with a nut and fixed, or the BOLT passes through the fastening hole FH on the stepped portion and then is fastened into a corresponding stud BOLT on the battery module to be fastened and fixed.

The upper vertical portion 512 is vertical and the outside is connected with the link 520. Specifically, the upper vertical portion 512 is provided with a connection hole 515, and the connection member 520 is provided with a connection hole 521 corresponding to the connection hole 515, and when the connection member 520 is fitted to the upper vertical portion 512 and the relative position thereof is adjusted such that the connection hole 521 on the connection member 520 is aligned with the connection hole 515 on the upper vertical portion 512, the fastening connection can be performed by a standard member.

According to an embodiment, the connector 520 is formed in a plate-shaped structure and is vertically disposed, wherein an upper portion of the connector 520 is fixed on the upper vertical portion 512 of the support 510 by fitting an inner side thereof to an outer side of the upper vertical portion 512 of the support 510, and a lower portion of the connector 520 is formed to extend downward in parallel to the lower vertical portion 513 of the support 510 and to correspond to the lower vertical portion 513 of the support 510. Specifically, the lower portion of the connector 520 corresponds to the through hole TH on the lower vertical portion 513, so that the welding gun passing through the through hole TH can perform a welding work with respect to the lower portion of the connector 520 to which the through hole TH corresponds. As used herein, "upper" refers to a portion of the link 520 fixedly coupled to the upper upright portion 512 of the support 510, and "lower" refers to a portion of the link 520 opposite to the "upper", i.e., a portion of the link 520 other than the "upper". The outer side of the lower portion of the link member 520 is coupled to the inner side of the second lateral side wall 10-3, as shown in fig. 3A. Thereby, the inner side of the upper portion of the connector 520 is connected with the upper vertical portion 511 of the supporter 510, and the outer side of the lower portion of the connector 520 is connected with the inner side of the second lateral sidewall 10-3, so that the supporter 510 can be fixed to the inner side of the second lateral sidewall 10-3 by the connector 520, so that the battery module can be overlapped and fixed on the step portion 511 of the supporter 510. As described above, the connecting member 520 is provided with the connecting hole 521 for connecting with the connecting hole 515 of the upper vertical portion 512 and by a fastener. The battery case 2000 according to the embodiment of the present invention provides two connection holes 515 arranged laterally symmetrically.

Fig. 3E shows the structure of the first laterally outer member 400 of the battery case 2000. Referring to fig. 3A, the first laterally outward component 400 is disposed laterally outward of the first lateral sidewall 10-1. Referring to fig. 3E, the first laterally outward component 400 includes a first laterally outward component body 410 and two side brackets 420 respectively disposed at both ends of the first laterally outward component body 410.

Specifically, the shape of the first laterally outer assembly body 410 matches the shape of the outer surface of the proximal end of the battery case 2000. Specifically, as described above, the first and second longitudinal side walls 10-2 and 10-4 are connected to the first lateral side wall 10-1 at the proximal end position of the battery case 2000 by a bent portion bent inward. Accordingly, the first laterally outer assembly body 410 includes a middle portion 410-1 and side end portions 410-2 bent inward from both ends of the middle portion 410-1. Wherein the middle portion 410-1 corresponds to the outer side of the first lateral sidewall 10-1 and is attached to the outer side of the first lateral sidewall 10-1, and the side end portion 410-2 corresponds to the bent portions of the first longitudinal sidewall 10-2 and the second longitudinal sidewall 10-4 connected to both ends of the first lateral sidewall 10-1 and is attached to the bent portions of the first longitudinal sidewall 10-2 and the second longitudinal sidewall 10-4. As such, the first laterally outer assembly body 410 may encompass the proximal end of the battery compartment 2000. An abutting surface 411 abutting against the side bracket 420 is provided at an end of the side end portion 410-2, wherein the abutting surface 411 is substantially perpendicular to an extending direction of the side end portion 410, i.e., perpendicular to a tangential direction of an outer surface of the side end portion 410-2. Accordingly, the side bracket 420 is provided with a second surface 422 corresponding to the abutment surface 411 of the side end portion 410-2. When the side bracket 420 is coupled to the first laterally outer assembly body 410, the second face 422 of the side bracket 420 abuts the abutting face 411 of the side end portion 410-2 of the first laterally outer assembly body 410.

The side bracket 420 further includes a first face 421, and the first face 421 is perpendicularly connected to a second face 422. And the second face 422 is located inside the first face 421. When the second face 422 of the side bracket 420 abuts the abutting face 411 of the side end portion 410-2 of the first transversely outer assembly body 410, the first face is located in an inner region formed by the side end portion 410-2 and the middle portion 410-1 of the first transversely outer assembly body 410 and contacts the bent portions of the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4 connected to both ends of the first transverse side wall 10-1.

The side end portion 410-2 is provided with a side-through hole STH, and when the second face 422 of the side bracket 420 is attached to the attachment face 411 of the side end portion 410-2 of the first transversely outer assembly body 410 such that the first face 421 is located at an inner region formed by the side end portion 410-2 and the middle portion 410-1 of the first transversely outer assembly body 410, the first face 421 can correspond to the side-through hole STH such that a welding gun can perform a welding operation on the first face 421 through the side-through hole STH, thereby welding the first face 421 contacting the bent portions of the first and second longitudinal side walls 10-2 and 10-4 to the bent portions of the first and second longitudinal side walls 10-2 and 10-4.

Fig. 3F shows the structure of the third traverse assembly 700 of the battery case 2000. Referring to fig. 3A, a third transverse assembly 700 is disposed transversely within the housing 10, wherein the third transverse assembly 700 is parallel to and between the first and second transversely

inner assemblies

300, 500. The third transverse assembly 700 is connected at both ends to the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4, and the third transverse assembly 700 is perpendicular to the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4.

Specifically, referring to fig. 3B, the third lateral assembly 700 includes a horizontal plane 710 for supporting the battery module, fastening holes FH are provided on the horizontal plane 710, through which fastening members, such as BOLTs BOLT, may be provided, and the battery module may be fixed to the horizontal plane 710 in the same manner as described above. Third transverse assembly 700 includes

flanges

720 and 730. Flanges 720 are provided at both ends of the third transverse member 700 in the lengthwise direction, and the third transverse member 700 can be connected to the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4 by the flanges 720. The flange 730 extends along the length of the third cross member 700 and has a horizontal surface that conforms to the bottom 10-5 of the housing 10, and the third cross member 700 may be coupled to the bottom 10-5 of the housing 10 by the flange 730.

The structure of the fourth cross assembly 900 is the same as that of the third cross assembly 700, and illustration of the fourth cross assembly 900 and detailed description thereof are omitted. Mounting position of the fourth transverse assembly 900 referring to fig. 3A, the fourth transverse assembly 900 is disposed transversely within the housing 10, wherein the fourth transverse assembly 900 is parallel to the first, second and third transverse

inner assemblies

300, 500 and is located between the first and second transverse

inner assemblies

300, 500. Both ends of the fourth transverse assembly 900 are connected to the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4, and the fourth transverse assembly 900 is perpendicular to the first longitudinal side wall 10-2 and the second longitudinal side wall 10-4.

Wherein the third transverse assembly 700 and the fourth transverse assembly 900 are spaced apart and the third transverse assembly 700 is positioned between the first transverse inner assembly 300 and the fourth transverse assembly 900 is positioned between the third transverse assembly 700 and the second transverse inner assembly 500.

Fig. 3G shows the structure of the first side member 20 of the battery case 2000. Referring to fig. 3A, the first side member 20 is longitudinally disposed outside the first longitudinal side wall 10-2, and the first side member 20 completely conforms to the outside of the first longitudinal side wall 10-2. The second side member 40 has the same structure as the first side member 20 and is disposed longitudinally outboard of the second longitudinal side wall 10-4, with the second side member 40 fully conforming to the outboard side of the second longitudinal side wall 10-4. The illustration of the second side member 40 is omitted here.

Fig. 3H shows the structure of the second laterally outer member 600 of the battery case 2000. Referring to fig. 3A, the second laterally outward component 600 is laterally disposed at the outer side of the second lateral side wall 10-3, and the second laterally outward component 600 may be fastened to the distal end of the battery case 2000 and can be attached to the outer side of the second lateral side wall 10-3.

Fig. 3I shows the first bottom member 30 of the battery case 2000; fig. 3J shows the second base member 50 of the battery case 2000. The first base member 30 and the second base member 50 of the battery case 2000 are described in detail during the assembly of the battery case 2000.

An assembly process of the battery case 2000 according to the embodiment of the present invention will be described with reference to fig. 4A to 7. In order to highlight the advantages of the present invention in the description, the assembly process of the prior art is described first with reference to fig. 1 and 2.

Referring to fig. 1 and 2, the assembly of the battery case 1000 requires three stations. At a first station, assembling the first cross member 700, the second cross member 900, the connecting member 520, the second lateral outer member 600 and the two side brackets 420 on the housing 10 to form a first intermediate body 3000; then, at a second station, the connecting member 320 and the first laterally outer assembly body 410 are assembled to the first intermediate body 3000 to form a second intermediate body 5000; and at the third station, the first base member 30, the second base member 50, the

supports

310 and 510, the first side member 20, and the second side member 40 are assembled on the second intermediate body 5000 to form the battery case 1000. It follows that the components of the battery pack are positioned in an inside-outside order, and therefore need to be mounted in order from the outside to the inside. Therefore, in the prior art, three stations are required to be used for assembling the battery box, the assembling process is complicated, a large amount of resources are consumed, and the cost is high. The assembly process of the battery case according to the present invention is described below.

FIG. 4A is a schematic illustration of an installation process for a first laterally inner assembly and a first laterally outer assembly according to the present invention; figure 4B is a schematic illustration of a cross-section along a-a of an installation process of a first laterally inner assembly and a second laterally outer assembly according to the present invention. Referring to fig. 4A and 4B, the first laterally inner assembly 300 and the first laterally outer assembly 400 are assembled prior to installation of the first laterally inner assembly 300 and the first laterally outer assembly 400. The assembly process of the first laterally inner assembly 300 and the first laterally outer assembly 400 may be as described above. The assembly process of the first laterally inner assembly 300 includes fitting the inner side of the upper portion of the connection member 320 to the outer side of the upper upright portion 312 of the support member 310 with the connection hole 321 on the connection member 320 aligned with the connection hole 315 on the upper upright portion 312, and fixing the connection member 320 to the upper upright portion 312 using a standard component, thereby completing the assembly of the first laterally inner assembly 300; the assembly process of the first laterally outer assembly 400 includes abutting the second face 422 of the side bracket 420 against the abutting face 411 of the side end portion 410-2 of the first laterally outer assembly body 410 and securing the side bracket 420 to the first laterally outer assembly body 410 using fasteners or other conventional techniques to complete the assembly of the first laterally outer assembly 400. The assembly process of the first laterally outer assembly 400 and the first laterally inner assembly 300 may be completed before the battery case is assembled, that is, the assembly process of the first laterally outer assembly 400 and the first laterally inner assembly 300 does not require a separate welding station for assembling the battery case.

The first laterally inner assembly 300 and the first laterally outer assembly 400 are placed medial and lateral to the first lateral sidewall 10-1, respectively. The outer side surface of the lower portion of the connector 320 abuts the inner side surface of the first lateral side wall 10-1, the inner side surface of the first lateral outer assembly body 410 of the first lateral outer assembly 400 abuts the outer side surface of the first lateral side wall 10-1, the step portion 311 of the support member 310 is horizontal, and the flange 314 of the support member 310 abuts the bottom portion 10-5 of the housing 10. The welding gun WG sequentially passes through the through-holes TH while welding the lower portion of the connector 320 attached to the inside of the first lateral side wall 10-1 and the first laterally outer assembly body 410 attached to the outside of the first lateral side wall 10-1 to the first lateral side wall 10-1. After soldering is completed through each of the through holes, a solder joint is formed at a position corresponding to the through hole. When the welding is completed through the through holes uniformly arranged in the lateral direction, the connection member 320 and the first laterally outer assembly body 410 are welded to the first lateral side wall 10-1 through a series of welding. Since the support member and the connection member have been assembled as the first laterally inner assembly and the first laterally outer assembly body and the side bracket have been assembled as the first laterally outer assembly before the battery case is assembled, the support member, the connection member, the first laterally outer assembly body and the side bracket can be simultaneously assembled to the case after passing through the above-described welding process.

As can also be seen with reference to fig. 4A and 4B, the first bottom member 30 horizontally spans the bottom 10-5 of the proximal end of the housing 10 and the first laterally outer assembly body 410 to simultaneously connect the bottom 10-5 of the proximal end of the housing 10 and the first laterally outer assembly body 410. The assembly of the first bottom member 30 can be performed at a different station than the assembly of the first laterally inner and outer assemblies described above.

FIG. 5A is a schematic illustration of an installation process for a second laterally inner assembly and a second laterally outer assembly according to the present invention; figure 5B is a schematic illustration of a cross-section along B-B of an installation process of a second laterally inner assembly and a second laterally outer assembly, in accordance with the present invention. Referring to fig. 5A and 5B, the second laterally inner assembly 500 is assembled prior to installation of the second laterally inner assembly 500 and the second laterally outer assembly 600. The assembly process of the second laterally inner assembly 500 may be as described above. The assembly process of the second laterally inner assembly 500 includes fitting the inner side of the upper portion of the connecting member 520 to the outer side of the upper upright portion 512 of the support member 510 with the connecting hole 521 of the connecting member 520 aligned with the connecting hole 515 of the upper upright portion 512, and fixing the connecting member 520 to the upper upright portion 512 using a standard component, thereby completing the assembly of the second laterally inner assembly 500; the second laterally outward component 600 is a unitary body that does not require pre-assembly. The assembly process of the second laterally outer assembly 600 and the second laterally inner assembly 500 may be completed before the battery case is assembled, that is, the assembly process of the second laterally outer assembly 600 and the second laterally inner assembly 500 does not require a separate welding station for assembling the battery case.

The second laterally inner component 500 and the second laterally outer component 600 are positioned medial and lateral to the second lateral sidewall 10-3, respectively. The outer surface of the lower portion of the connector 520 is attached to the inner surface of the second lateral side wall 10-3, the inner surface of the second lateral outer member 600 is attached to the outer surface of the second lateral side wall 10-3, the step 511 of the supporter 510 is horizontal, and the flange 514 of the supporter 510 is attached to the bottom 10-5 of the casing 10. The welding gun WG sequentially passes through the through holes TH while welding the lower portion of the connector 520 attached to the inside of the second lateral side wall 10-3 and the second laterally outward assembly 600 attached to the outside of the second lateral side wall 10-3 to the second lateral side wall 10-3. After soldering is completed through each of the through holes, a solder joint is formed at a position corresponding to the through hole. When the welding is performed through the through holes uniformly arranged in the lateral direction, the connector 520 and the second laterally outward component 600 are welded to the second lateral sidewall 10-3 through a series of welding. Since the support member and the connecting member are already assembled as the second laterally inner assembly before the battery case is assembled, the support member, the connecting member, and the second laterally outer assembly can be simultaneously assembled to the case after passing through the above-described welding process. This assembly process may be performed at the same station as the welding process of the first laterally outer component and the first laterally inner component to the shell described above with reference to fig. 4A and 4B.

As can also be seen with reference to FIGS. 5A and 5B, the second sole member 50 horizontally spans the proximal sole portion 10-5 of the housing 10 and the second laterally outward component 600 to simultaneously connect the proximal sole portion 10-5 of the housing 10 and the first laterally outward component 600. The assembly process of the second chassis member 50 can be performed at a different station than the assembly process of the second laterally inner and second laterally outer assemblies described above and can be performed at the same station as the assembly process of the first chassis member 30 described above.

FIG. 6A is a schematic illustration of an installation process of a side bracket according to the present invention; FIG. 6B is a schematic illustration of a cross-section along C-C of the installation process of the side bracket according to the present invention. Referring to fig. 6A and 6B, after the first laterally inner assembly 300 and the first laterally outer assembly 400 are assembled to the case 10 by the method described with reference to fig. 4A and 4B, since the first laterally outer assembly 400 at this time already includes the first laterally outer assembly body 410 welded to the first laterally sidewall 10-1 of the case 10 and the side end portion 410-2 previously fixed to the first laterally outer assembly body 410, it is necessary to fix the side bracket 420 to the case 10 at this time. As described above, the side-through hole STH is provided on the side end portion 410-2 of the first transverse outer assembly body 410, and corresponds to the first face 421 of the side bracket 420, so that the welding gun can weld the first face 421 on the corresponding side wall of the case 10, particularly, the surface of the outside of the kink portion of the first and second longitudinal side walls 10-2 and 10-4 of the case 10, through the side-through hole STH. This assembly process may be performed at the same station as the assembly process of the first laterally inner and outer assemblies described above with reference to figures 4A and 4B and the first laterally inner and second laterally outer assemblies described above with reference to figures 5A and 5B.

Fig. 7 is an assembly process of the battery case according to the present invention. Referring to fig. 7, the first laterally inner assembly 300, the first laterally outer assembly 400, and the second laterally inner assembly 500 are assembled in advance before the battery pack is assembled, and thus the first laterally inner assembly 300, the first laterally outer assembly 400, the second laterally inner assembly 500, the second laterally outer assembly 600, and the third and fourth

lateral assemblies

700 and 900 are mounted to the case to form a first intermediate body 4000 at a first station. The method of mounting the first laterally inner assembly 300, the first laterally outer assembly 400, the second laterally inner assembly 500, and the second laterally outer assembly 600 may be performed as described above with reference to figures 4A-6B. The first base member 30, the second base member 50, and the first and

second side members

20 and 40 are then mounted on the first intermediate body 4000 to form the battery case 2000.

Therefore, the battery box can be assembled only through two stations, and the battery box formed by the assembling method is installed without influencing the use performance. Therefore, the battery box and the assembling method thereof can simplify the assembling process, reduce the cost and have better economical efficiency.

Another aspect of the present invention is to provide a vehicle including the battery case as described above, in which an assembly process is simplified due to a reduction in support cost of the battery case, thereby allowing the vehicle including the battery case to be manufactured at a reduced cost with good economy.

In summary, an aspect of the present invention provides a battery pack for a vehicle, including: a housing formed in a box shape having an opening and having a first lateral sidewall at a proximal end, a second lateral sidewall at a distal end, and first and second longitudinal sidewalls connected between the first and second lateral sidewalls; a first laterally inner component and a first laterally outer component disposed laterally inboard and outboard, respectively, of the first lateral sidewall; and a second laterally inner assembly and a second laterally outer assembly disposed laterally inboard and outboard, respectively, of the second lateral sidewall, wherein each of the first laterally inner assembly and the second laterally outer assembly includes: a supporter having a stepped portion supporting the battery module, and an upper vertical portion vertically extending upward from an outer edge of the stepped portion and a lower vertical portion vertically extending downward from an inner edge of the stepped portion; and a connecting member vertically disposed and having an inner side connected to the upper vertical portion of the supporting member and an outer side connected to an inner side of a corresponding one of the first and second lateral side walls, wherein a plurality of through holes corresponding to the connecting member are opened on the lower vertical portion to implement connection of the connecting member to the inner side of the corresponding lateral side wall through the plurality of through holes. Therefore, compared with the assembly process that the connecting piece is welded on the side wall of the shell in one station and then the supporting piece is welded on the connecting piece in the next station in the prior art, the battery box and the assembly method thereof provided by the invention can fix the connecting piece on the supporting piece before the battery box is assembled, and because the supporting piece is provided with a plurality of through holes, when a first transverse inner assembly and a first transverse outer assembly formed by connecting the connecting piece and the supporting piece are welded on the shell, a welding gun can weld the connecting piece on the first transverse inner assembly and the first transverse outer assembly on the shell on the side wall of the shell through the through holes. This can reduce the number of stations required to assemble the battery case. And the cost is lower when the connecting piece is fixed on the supporting piece before the assembly than when a station is added. And the performance of the battery box and the battery mounted on the battery box is not influenced due to the through holes. Therefore, the battery box provided by the invention not only can meet the performance requirement, but also reduces the number of assembly stations and simplifies the assembly process and steps, thereby reducing the production cost

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A battery compartment for a vehicle, comprising:

a housing formed in a box shape having an opening and having a first lateral sidewall at a proximal end, a second lateral sidewall at a distal end, and first and second longitudinal sidewalls connected between the first and second lateral sidewalls;

a first laterally inner component and a first laterally outer component disposed laterally inboard and outboard, respectively, of the first lateral sidewall; and

a second laterally inner component and a second laterally outer component disposed laterally inboard and outboard, respectively, of said second lateral sidewall,

each of the first laterally inner assembly and the second laterally inner assembly comprises:

A supporter having a stepped part supporting a battery module, and an upper vertical part vertically extending upward from an outer edge of the stepped part and a lower vertical part vertically extending downward from an inner edge of the stepped part; and

a connecting member vertically disposed with an inner side connected with the upper vertical portion of the supporter and an outer side connected with an inner side of a corresponding one of the first and second lateral side walls,

wherein a plurality of through holes corresponding to the connecting members are opened on the lower vertical portion to implement the connection of the connecting members to the inner sides of the respective lateral side walls through the plurality of through holes.

2. The battery pack according to claim 1, wherein the plurality of through-holes are uniformly arranged in the lower vertical portion in the lateral direction.

3. The battery pack according to claim 2, wherein the first transverse outer assembly comprises a first transverse outer assembly body and side brackets provided at both ends of the first transverse outer assembly body and connected to the first and second longitudinal side walls at both ends of the first transverse side wall, respectively.

4. The battery pack according to claim 3, wherein the first transverse outer assembly body is provided at both ends with side-through holes respectively corresponding to the respective side brackets, to effect connection of the respective side brackets to the first and second longitudinal side walls at both ends of the first transverse side wall through the side-through holes.

5. A battery pack as claimed in claim 4, further comprising:

a first bottom member horizontally spanning the bottom of the housing proximal end and the bottom of the first laterally outer assembly body to simultaneously connect the bottom of the housing proximal end and the first laterally outer assembly body; and

a second bottom member horizontally spanning the bottom of the housing distal end and the bottom of the second laterally outward component to simultaneously connect the bottom of the housing distal end and the second laterally outward component.

6. A battery pack as claimed in claim 5, further comprising:

a first side member longitudinally disposed outboard of the first longitudinal sidewall; and

a second side member disposed longitudinally outboard of the second longitudinal sidewall.

7. The battery compartment of claim 6 further comprising a third transverse assembly and a fourth transverse assembly connected between the first longitudinal side wall and the second longitudinal side wall parallel to the first transverse inner assembly and the second transverse inner assembly, wherein the third transverse assembly and the fourth transverse assembly are spaced apart and located between the first transverse inner assembly and the second transverse inner assembly.

8. The battery cartridge as claimed in claim 7, wherein fastening holes through which fastening members pass to fasten battery modules are provided on the step part of the support of each of the first and second lateral inner assemblies and the third and fourth lateral assemblies.

9. A method of assembling a battery case according to any one of claims 1 to 8, comprising:

forming a first laterally inner assembly and a second laterally inner assembly by fixing the connectors to the upper vertical portions of the supports, and forming a first laterally outer assembly by fixing the side brackets to both ends of the first laterally outer assembly body, respectively;

simultaneously welding a welding gun to the connector of the first transverse inner assembly, the first transverse outer assembly body of the first transverse outer assembly and to the first transverse sidewall and to the connector of the second transverse inner assembly, the second transverse outer assembly and to the first longitudinal sidewall and the second longitudinal sidewall at both ends of the first transverse sidewall, respectively, through the side-through holes on the lower vertical portion of the support; and is

The first bottom member, the second bottom member, the first side member, and the second side member are mounted.

10. A vehicle characterized by comprising a battery pack according to any one of claims 1 to 8.