MOUNTING SYSTEM FOR A BATTERY HOUSING FOR AN ELECTRIC VEHICLE

Abstract

Mounting system of a battery housing for an electric vehicle, comprising a core (100) for mounting a cross member (1) mounted on a battery housing and a core fastening device (200) for fastening the core (100), wherein the core (100) can be inserted into a closed section (3) with a closed cross-section in the longitudinal direction of the cross member (1) in order to laser weld at least one part (7) to be mounted to the cross member (1) of the battery housing with the closed section (3), comprising: encompassing the core (100): a first core block (10) with a first sliding surface (11) which is arranged on one side of the first core block (10) and is inclined in the width direction of the first core block (10) from one side to the other of the first core block (10), so that the first core block (10) has different width-directed thicknesses on the top and bottom sides; a second core block (20) with a second sliding surface (21) arranged on one side of the second core block (20) and inclined in the width direction of the second core block (20) from one side to the other of the second core block (20), so that the second core block (20) has different width-directed thicknesses on the top and bottom sides in order to slide upwards and downwards on the corresponding first sliding surface (11) of the first core block (10); a plurality of first magnetic elements (30) mounted on a surface of the first core block (10), the first core block (10) having a sliding element (15) connected to one surface of the first core block (10) and having a first sliding surface, the sliding element (15) being fastened to one surface of the first core block (10) by at least one bolt (B), each of the plurality of first magnetic elements (30) being attached to one surface of the first core block (10) and fastened by a first magnetic bolt (31); and a plurality of second magnetic elements (40) mounted on a surface of the second core block (20) opposite one surface of the first core block (10), each of the plurality of second magnetic elements (40) having a different polarity than each of the plurality of first magnetic elements (30) and attached to one surface of the second core block (20) and fastened by a second magnetic bolt (41); a first contact surface (13) formed on the surface of the first core block (10) opposite the first sliding surface (11) and pressing against a surface of the closed section (3) of the crossbeam (1); and a second contact surface (23) which is formed on the surface of the second core block (20) opposite the second sliding surface (21) and which presses on another surface of the closed section (3) of the crossbeam (1); comprising a core mounting frame (110): a plurality of element support blocks (130) mounted forwards and backwards on a top side of the core mounting frame (110) to support the crossbeam (1) longitudinally; at least one clamping device (150) mounted on the top of the core mounting frame (110) that clamps the cross member (1); and a core support block (170) which is mounted in a front of the core mounting frame (110) to support an end section in the longitudinal direction of the core (100) fitted into the closed section (3) of the crossbeam (1).

Description

BACKGROUND OF THE INVENTION(a) Field of the invention

[0001] The present invention relates to a mounting system for a battery housing for an electric vehicle, and in particular to a core for mounting a cross member mounted on a battery housing and a core fastening device. (b) Description of the associated technology

[0002] Recently, the development of electric vehicles has been steadily accelerated due to pollution problems and efforts to develop alternative energy sources.

[0003] The electric vehicle is equipped with an electric motor (drive motor) for propelling the vehicle and a high-voltage battery pack that supplies the electric motor with power. The high-voltage battery pack is an energy source that drives the electric motor and supplies the high-voltage energy to the electric motor via an inverter.

[0004] The battery pack is generally mounted on a lower section of a vehicle body. The battery pack comprises a battery housing with an interior, a number of battery modules mounted inside the battery housing, and a cover that protects the battery housing.

[0005] Here, a multitude of crossbeams are attached to a base surface of the battery housing, designed to subdivide a mounting area for the multitude of battery modules. For example, each of the multitude of crossbeams can be designed as a closed cross-section with a square cross-sectional shape. Components to be mounted, such as a housing retaining bracket, a battery module mounting bracket, and a reinforcement bracket, are each attached to the multitude of crossbeams. The components to be mounted can each be connected to the multitude of crossbeams.

[0006] According to the state of the art, the parts to be assembled can be joined to an outside of the crossbeam by means of a laser beam, which is emitted by a laser welding gun of a welding robot, while they are clamped together in a welding device.

[0007] However, since, according to the state of the art, each of the multitude of crossbeams is designed as a closed cross-section with a square cross-sectional shape, the crossbeam can be thermally deformed by the laser beam when the parts to be mounted are laser-welded to the outside.

[0008] Thermal deformation causes a gap between the crossbeam and the part to be mounted, and as a result, thermal deformation can act as a cause for a reduction in the laser welding quality of the part to be mounted to the crossbeam.

[0009] DE 32 12 677 A1 describes a clamping element consisting of two bodies movable relative to each other, at least one of which has at least two diverging side surfaces and a second body rests against one of the diverging surfaces and is displaceable relative to it. The bodies are surrounded by a shrinkable shell that shrinks when heated, thereby causing a relative displacement of the two bodies, which leads to a change in the external dimensions of the clamping element. The clamping elements are particularly suitable for clamping and supporting the windings of transformers.

[0010] DE 10 2026 101 174 A1 describes a fastening device for insertion into a recess, comprising a base with at least one connecting section and at least one retaining element movable relative to the connecting section, wherein in an insertion position of the retaining element the total cross-section of connecting section and retaining element is equal to or less than the diameter of the recess and when a force directed against the insertion direction is applied the total cross-section of connecting section and retaining element is increased by a relative movement between retaining element and connecting section such that the fastening device rests forcefully against a wall of the recess in a holding position of the retaining element.

[0011] In DE 10 2014 100 114 A1, an adjustment device for positioning an adjustable assembly by means of a guide device is described.

[0012] JP H02-116444A describes a cutting device for the outer surface of a polygonal metal tube and the core used for it.

[0013] CN 1 09 332 991 A describes a welding prepositioning expansion tool and a method for welding small assemblies using the same.

[0014] The information disclosed in this chapter “Background” serves only to provide a better understanding of the background of the invention and may therefore contain information that does not represent the prior art which is already known to the average person skilled in the art in this country. SUMMARY OF THE INVENTION

[0015] Exemplary embodiments of the present invention have been made to provide a core for mounting a cross member of a battery housing and a core fastening device that can minimize the thermal deformation of a cross member by a laser beam when parts of the cross member to be mounted are joined to the cross member by laser welding.

[0016] The invention relates to a mounting system for a battery housing for an electric vehicle, comprising a core for mounting a cross member mounted on a battery housing and a core fastening device for fastening the core with the features of claim 1. Further developments of the invention are specified in the dependent claims.

[0017] A core for mounting a cross member of a battery housing is inserted into a closed section with a closed cross-section in the longitudinal direction of the cross member in order to laser weld at least one part to be mounted to the cross member of the battery housing with the closed section.The core comprises the following: a first steel core block having a first sliding surface arranged on one side of the first core block and inclined in the width direction of the first core block from one side to the other; a second steel core block having a second sliding surface arranged on one side of the second core block and inclined in the width direction of the second core block from one side to the other of the second core block to slide up and down on the corresponding first sliding surface of the first core block; a plurality of first magnetic elements mounted on one surface of the first core block; and a plurality of second magnetic elements mounted on a surface of the second core block opposite one surface of the first core block.

[0018] The first core block includes a sliding element that is connected to one surface of the first core block and has the first sliding surface.

[0019] The sliding element is attached to one surface of the first core block by at least one bolt.

[0020] A coupling groove can be formed on one surface of the second core block, to which the sliding element is connected.

[0021] The second sliding surface can be formed at the coupling groove.

[0022] A first contact surface, formed on the surface of the first core block opposite the first sliding surface, presses against a surface of the closed section of the crossbeam.

[0023] A second contact surface, formed on the surface of the second core block opposite the second sliding surface, presses against another surface of the closed section of the crossbeam.

[0024] Each of the multitude of first magnetic elements is attached to one surface of the first core block and secured by a first magnetic bolt.

[0025] Each of the multiple second magnetic elements has a different polarity than each of the multiple first magnetic elements and is attached to one surface of the second core block and secured by a second magnetic bolt.

[0026] Each of the multitude of first magnetic elements and each of the multitude of second magnetic elements can be arranged at a distance from each other.

[0027] Locking projections can be formed on both end sections in the longitudinal direction of the first core block and the second core block.

[0028] The core fastening device comprises the following: a core fastening frame comprising: a plurality of element support blocks mounted forward and backward on a top side of the core fastening frame to support the crossbeam longitudinally; at least one clamping device mounted on the top side of the core fastening frame to clamp the crossbeam; and a core support block mounted in a front side of the core fastening frame to support an end section longitudinally of the core fitted into the closed section of the crossbeam.

[0029] Each of the numerous element support blocks can include a pair of support ribs, each supporting both surfaces in the lateral direction of the crossbeam.

[0030] Each of the pair of supporting ribs can be provided in a shape that becomes thicker from top to bottom.

[0031] Each of the pair of supporting ribs can have a support surface that supports each of the two surfaces in the width direction of the crossbeam, as well as a tapered surface that connects the top and the support surface.

[0032] The at least one clamping device may comprise a fixing means attached to the core mounting frame, a clamping handle rotatably mounted in the fixing means and optionally connected to the fixing means, a clamping body connected to the clamping handle and a clamping block attached to the clamping body.

[0033] The core support block can include a core support roller rotatably connected to both support bodies opposite each other in the width direction, and a first stopper connected to the upper sections of the two support bodies.

[0034] The core mounting device may further comprise: a core alignment frame mounted so that it can be connected to the core mounting frame; a plurality of core guide blocks mounted in a rear of the core mounting frame to support the other end section longitudinally of the core attached to the closed section of the crossbeam, and mounted in the core alignment frame spaced forward and rearward from each other to guide the core to be mounted to the closed section of the crossbeam towards the closed section; and a plurality of core alignment blocks mounted in the core alignment frame to align a plurality of cores to be mounted to the closed section of the crossbeam.

[0035] Each of the core guide blocks can include a core guide roller that is rotatably connected to the two guide bodies opposite each other in the width direction.

[0036] A second stopper can be mounted in a core guide block that corresponds to the other end section in the longitudinal direction of the core among the multitude of core guide blocks.

[0037] Each of the multitude of core alignment blocks can comprise both alignment bodies, which are arranged opposite each other in the width direction.

[0038] Each of the multitude of core alignment blocks can be connected to one end section, the other end section, and longitudinally between one end section and the other end section of the core.

[0039] When a component to be mounted is joined to crossbeams by laser welding, the thermal deformation of the crossbeam by a laser beam can be minimized by means of a core according to the present invention. Therefore, the formation of a gap between the crossbeam and the component to be mounted can be prevented, and the quality of the laser welding of the component to be mounted to the crossbeam can be further improved.

[0040] Therefore, the formation of a gap between the crossbeam and the part to be mounted can be prevented, and the quality of the laser welding of the part to be mounted to the crossbeam can be further improved. That is to say, various effects predicted according to the exemplary embodiment of the present invention are disclosed in the detailed description to follow. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] These drawings serve to describe an embodiment of the present invention, and therefore the technical spirit of the present invention should not be interpreted as being limited to the accompanying drawings. Fig. Figure 1 shows a perspective view illustrating a core for mounting a cross member of a battery housing and a core fastening device according to an embodiment of the present invention. Fig. Figure 2 shows a view illustrating an example of the cross member attached to the core to assemble a cross member of a battery housing and the core fastening device according to an embodiment of the present invention. Fig. Figure 3 shows a perspective coupling view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention. Fig. Figure 4 shows a partially separated perspective view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention. Fig. Figure 5 shows a perspective coupling view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention. Fig. 6 and Fig. Figure 7 shows views illustrating the core fastening device according to an embodiment of the present invention. Fig. Figure 8 shows a view illustrating an element support block attached to the core fastening device according to an embodiment of the present invention. Fig. Figure 9 shows a view illustrating a core support block attached to the core fastening device according to an embodiment of the present invention. Fig. Figure 10 shows a view illustrating a core guide block attached to the core fastening device according to an embodiment of the present invention. Fig. Figure 11 shows a view illustrating a core alignment block attached to the core mounting device according to an embodiment of the present invention.

[0042] It should be noted that the drawings described above are not particularly to scale, but rather represent a brief illustration of various preferred features that demonstrate a basic principle of the present invention. For example, certain design features of the present invention, including specific dimensions, directions, positions, and shapes, are partly determined depending on a specific application and operating environment. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0043] The present invention is described in more detail below with reference to the accompanying drawings, which illustrate exemplary embodiments of the invention. As a person skilled in the art would recognize, the described embodiments can be modified in many different ways without departing from the spirit or scope of the present invention.

[0044] The terms used herein serve only to describe specific embodiments and are not intended to limit the present disclosure. The singular forms used herein are intended to include the plural forms unless expressly stated otherwise in a specific context.

[0045] Furthermore, it is understood that the terms "exhibit" and / or "exhibiting," as used herein, indicate the presence of the aforementioned characteristics, integers, steps, processes, elements, and / or components, but that the presence or addition of one or more other characteristics, integers, steps, processes, components, and / or groups thereof is not excluded. In the present context, the term "and / or" includes any and all random combinations of one or more related and listed items.

[0046] The term "connected" here refers to a physical relationship between two components that are directly connected by welding, self-piercing riveting (SPR), flow drilling screws (FDS), structural adhesives, etc., or indirectly by one or more parameters.

[0047] The terms “vehicle”, “vehicle-”, “car” or other similar terms used herein generally include passenger cars, including passenger vehicles, sport utility vehicles (SUVs), buses, trucks and various commercial vehicles, as well as hybrid vehicles, electric vehicles, hybrid electric vehicles, special-purpose vehicles based on electric vehicles (PBVs), hydrogen-powered vehicles and other vehicles powered by alternative fuels (e.g. fuel derived from resources other than petroleum).

[0048] Exemplary embodiments of the present invention are described in more detail below with reference to the accompanying drawings.

[0049] Fig. Figure 1 shows a perspective view illustrating a core for mounting a cross member of a battery housing and a core fastening device according to an embodiment of the present invention.

[0050] With reference to Fig. 1. The core 100 for mounting a cross member of a battery housing and the core fastening device 200 according to the embodiment of the present invention can be applied to a method for mounting a battery housing (not shown) of a battery pack (not shown) attached to an electric vehicle. Furthermore, the core 100 for mounting a cross member of a battery housing and the core fastening device 200 according to the embodiment of the present invention can be applied to a method for mounting a plurality of cross members 1 attached to the battery housing (not shown).

[0051] The plurality of crossbeams 1 is designed to support and fix a plurality of battery modules (not shown) housed in the battery casing. In one example, each of the plurality of crossbeams 1 has a closed section 3 with a substantially square cross-sectional shape, as shown in Fig. 2 shown.

[0052] Here, at least one support 5 is connected to each of the multiple crossbeams 1 with a battery module mounting bracket and a reinforcement bracket, and at least one part 7 to be mounted can additionally be mounted (e.g. glued or welded) to at least one support 5.

[0053] Furthermore, the core 100 for mounting a cross member of a battery housing and the core fastening device 200 according to the embodiment of the present invention can be applied to a welding assembly method in which at least one part 7 to be mounted is laser-welded to each of the plurality of cross members 1 by directing a laser beam onto a connecting section of each of the plurality of cross members 1 and at least one part 7 to be mounted.

[0054] In the embodiment of the present invention, it is described that the part 7 to be mounted is laser-welded to the crossbeam 1 attached to the battery housing. However, if a part to be mounted, such as a support, is laser-welded to a base material with a closed cross-section and a defined shape, the technical idea of ​​the present invention can be applied, even though it is not specifically limited to this.

[0055] The present invention describes an example in which components are assembled based on a forward and backward direction.

[0056] Furthermore, in the present invention, an “upper section” or “top” of the component refers to an end section, a section, an end, or a surface of the component that is located at the top in the figure, and a “lower section” refers to a “bottom” or a “bottom” of the component. “Lower ends”, “lower parts”, “bottom”, or “bottom” refers to an end section, a section, an end, or a surface that is located at the bottom in the figure.

[0057] Furthermore, in the present invention, the end (e.g., one end or the other end) of the component refers to the end of the component in a predetermined direction, and the end section (e.g., one end section or the other end section) of the component refers to a predetermined section of the component that includes the end.

[0058] The core 100 for mounting a cross member of a battery housing and the core fastening device 200 according to the embodiment of the present invention are designed in a structure in which, when at least one part 7 to be mounted is connected to each of the plurality of cross members 1 by laser welding, the thermal deformation of the cross members 1 by the laser beam can be minimized.

[0059] For this purpose, the core 100 for mounting a cross member of a battery housing according to the embodiment of the present invention is designed such that it can be inserted into the closed section 3 of each of the plurality of cross members 1 in the longitudinal direction of each of the plurality of cross members 1.

[0060] Fig. Figure 3 shows a perspective coupling view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention. Fig. Figure 4 shows a partially separated perspective view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention, and Fig. Figure 5 shows a perspective coupling view illustrating the core for mounting a cross member of a battery housing according to an embodiment of the present invention.

[0061] With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5 the core 100 for mounting a cross member of a battery housing according to the embodiment of the present invention in principle comprises a first core block 10, a second core block 20, a plurality of first magnetic elements 30 and a plurality of second magnetic elements 40.

[0062] In the embodiment of the present invention, the first core block 10 is made of a steel material. The first core block 10 comprises a sliding surface 11 inclined in the opposite direction on one side in the width direction.

[0063] A first contact surface 13, which presses on a surface of an inside (e.g. on the closed section 3) of each of the plurality of crossbeams 1, is formed on the other surface of the first core block 10.

[0064] Furthermore, the first core block 10 also includes a sliding element 15 connected to one surface. The sliding element 15 is formed on the aforementioned first sliding surface 11 in the direction upwards and downwards.

[0065] Here, the sliding element 15 is attached to the first core block 10 by a plurality of bolts B. Furthermore, first locking projections 17 are shown (see Fig. 9 and Fig. 10) formed at both end sections in the longitudinal direction of the first core block 10.

[0066] In the embodiment of the present invention, the second core block 20 is made of steel. The second core block 20 comprises a second sliding surface 21, which is inclined on one side in the width direction in order to slide upwards and downwards on the first sliding surface 11 of the corresponding first core block 10.

[0067] A second contact surface 23, which presses on the other surface of the inside (e.g. on the closed section 3) of each of the plurality of crossbeams 1, is formed on the other surface of the second core block 20.

[0068] A coupling groove 25, to which a sliding element 15 is connected, is formed on a surface of the second core block 20 in order to slide upwards and downwards on the first sliding surface 11 of the first core block 10.

[0069] Here, a second sliding surface 21, which can slide up and down on the first sliding surface 11 of the sliding element 15, is formed on the coupling groove 25. Furthermore, second locking projections 29 are provided (see Fig. 9 and Fig. 20) formed at both end sections in the longitudinal direction of the second core block 20.

[0070] In the embodiment of the present invention, the plurality of first magnetic elements 30 and the plurality of second magnetic elements 40 connect surfaces of the first core block 10 and the second core block that are opposite each other.

[0071] Each of the plurality of first magnetic elements 30 is mounted on a surface of the first core block 10. Each of the plurality of first magnetic elements 30 can be attached to a surface of the first core block 10 and fastened to a surface of the first core block 10 by a first magnetic bolt 31.

[0072] Furthermore, each of the plurality of second magnetic elements 40 is mounted on a surface of the second core block 20 that faces a surface of the first core block 10. Each of the plurality of second magnetic elements 40 can exhibit a different polarity than each of the plurality of first magnetic elements 30. Each of the plurality of second magnetic elements 40 can be attached to a surface of the second core block 20 and secured to a surface of the second core block 20 by a second magnetic bolt 41.

[0073] Here, each of the plurality of first magnetic elements 30 mounted on a surface of the first core block 10 and each of the plurality of second magnetic elements 40 mounted on a surface of the second core block 20 can be arranged upwards and downwards at a distance from each other.

[0074] Meanwhile, with regard to Fig. 1 the core 100 by the core fastening device 200 according to the embodiment of the present invention on the closed section 3 (see Fig. 2) each of the multiple crossbeams 1 is attached.

[0075] The core fastening device 200 according to the embodiment of the present invention comprises in principle a core fastening frame 110, a plurality of element support blocks 130, at least one clamping device 150, a core support block 170, a core alignment frame 190, a plurality of core guide blocks 210 and a plurality of core alignment blocks 230.

[0076] Fig. 6 and Fig. Figure 7 shows views illustrating the core fastening device according to an embodiment of the present invention.

[0077] With reference to Fig. 6 and Fig. In the exemplary embodiment of the present invention, the core mounting frame 110 is mounted on a floor surface of a workstation of the method. The core mounting frame 110 is designed to mount various components, which will be described below. The core mounting frame 110 can consist of a single frame or of two or more subdivided frames.

[0078] The core mounting frame 110 can include various accessories such as a beam, rod, bar, plate, housing, casing, block, partition and rib designed to support the respective components.

[0079] However, since the various accessories are designed to attach the respective components to be described below to the core mounting frame 110, the various accessories are collectively referred to as core mounting frame 110, except in one exceptional case in the embodiment of the present invention.

[0080] In the embodiment of the present invention, the plurality of element support blocks 130 supports one of the plurality of crossbeams 1 in the longitudinal direction. The plurality of element support blocks 130 is mounted longitudinally on a top surface of the core mounting frame 110.

[0081] Each of the multiple element support blocks 130 comprises a pair of support ribs 131 that support both surfaces of the crossbeam 1 in the lateral direction. Each of the multiple element support blocks 130 can be provided in a shape that gradually increases in thickness from the top to the bottom.

[0082] Each of the single pair of support ribs 131 here includes a support surface 133 that supports each of the two surfaces of the crossbeam 1 in the lateral direction, as well as a tapered surface 135 that connects the top surface and the support surface 133.

[0083] In the embodiment of the present invention, the at least one clamping device 150 is designed to clamp the crossbeams 1 mounted on the plurality of element support blocks 130. The at least one clamping device 150 can be mounted on the top side of the core mounting frame 110.

[0084] The at least one clamping device 150 comprises a fixing means 151, a clamping handle 153, a clamping body 155 and a clamping block 157.

[0085] The fixing device 151 is attached to the top of the core mounting frame 110. The clamping handle 153 is rotatably mounted in the fixing device 151 and can optionally be connected to the fixing device 151.

[0086] The clamping body 155 is connected to the clamping handle 153 so that it can rotate up and down together with the clamping handle 153. Additionally, the clamping block 157 presses on the top of the crossbeam 1 (e.g., clamping it in place). The clamping block 157 is designed as a type of rubber block and, in one example, is attached to an end section of the clamping body 155.

[0087] Since the at least one clamping device 150 is designed as a toggle clamp well known to those skilled in the art, a more detailed description of the component is given in the present invention.

[0088] In the embodiment of the present invention, the core support block 170 supports an end section in the longitudinal direction of the core 100 attached to the closed section 3 of the cross member 1. The core support block 170 is mounted in a front face (e.g. a side in the longitudinal direction) of the core mounting frame 110 such that it corresponds to an end section in the longitudinal direction of the core 100.

[0089] As in Fig. As shown in Figure 9, the core support block 170 comprises a core support block 173 rotatably connected to the two opposing support bodies 171 and a first stopper 175, which is connected to the upper section of the two support bodies 171.

[0090] The core support block 173 is designed to come into rolling contact with an end section in the longitudinal direction of the core 100 mounted on the closed section 3 of the crossbeam 1. The first stopper 175 supports a first locking projection 17 and a second locking projection 29, which are formed on an end section in the longitudinal direction of the first core block 10 and the second core block 20, respectively.

[0091] In the embodiment of the present invention, the core alignment frame 190 is mounted on the floor surface of the work area of ​​the method and connected to the core mounting frame 110 at the front and rear (in the longitudinal direction). The core alignment frame 190 is designed to mount various components, which will be described below. The core alignment frame 190 can consist of a single frame or of two or more subdivided frames.

[0092] The core alignment frame 190 can include various accessories such as the beam, rod, bar, plate, housing, shell, block, partition and rib, which are designed to support the respective components.

[0093] However, since the various accessories are designed to attach the respective components to be described below to the core alignment frame 190, the various accessories are collectively referred to as core alignment frame 190, except in one exceptional case in the embodiment of the present invention.

[0094] In the embodiment of the present invention, the plurality of core guide blocks 210 are mounted in a rear side (the other side in the longitudinal direction) of the core mounting frame 110 to support the other end section in the longitudinal direction of the core 100 mounted on the closed section 3 of the cross member 1, and are mounted at a distance from the core alignment frame 190 to the front and rear in order to guide the core 100 to be mounted on the closed section 3 of the cross member 1 to the closed section 3.

[0095] As in Fig. As shown in Figure 10, each of the multiple core guide blocks 210 comprises a core guide roller 213, which is rotatably connected to the two guide bodies 211 opposite each other in the width direction.

[0096] The core guide block 213 is designed to come into contact with the lower section of the core 100 in a rolling manner.

[0097] Furthermore, among the multiple core guide blocks 210, a second stopper 215 is mounted in one core guide block 210, corresponding to the other end section in the longitudinal direction of the core 100. The second stopper 215 supports a first locking projection 17 and a second locking projection 29, which are formed on the other end section in the longitudinal direction of the first core block 10 and the second core block 20, respectively.

[0098] In the embodiment of the present invention, the plurality of cores 100 to be attached to the closed section 3 of the crossbeam 1 are aligned longitudinally by the plurality of core alignment blocks 230. The plurality of core alignment blocks 230 are mounted on the top side of the core alignment frame 190.

[0099] Each of the multiple core alignment blocks 230 comprises both alignment bodies 231, which are arranged opposite each other in the width direction, as shown in Fig. Figure 11 shows that each of the multiple core alignment blocks 230 can be connected longitudinally to one end section, the other end section, and between one end section and the other end section of the core 100.

[0100] The following describes the processes of the core 100 for mounting the cross member of the battery housing and the core fastening device 200 designed as such, according to the exemplary embodiment of the present invention, with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10 to Fig. 11 described in more detail.

[0101] Initially, in the exemplary embodiments, a plurality of cores 100 are provided. The plurality of cores 100 are aligned by a plurality of core alignment blocks 230 in the core fastening device 200.

[0102] Here, a first core block 10 and a second core block of each of the plurality of cores 100 are connected to each other by a plurality of first magnetic elements 30 and a plurality of second magnetic elements 40.

[0103] Furthermore, the first core block 10 is arranged above the second core block 20 in a state in which it is connected to the second core block 20 by the plurality of first magnetic elements 30 and the plurality of second magnetic elements 40, while a first sliding surface 11 of a sliding element 15 is located on the upper section of a second sliding surface 21 of the second core block 20.

[0104] In the embodiment of the present invention, however, a plurality of crossbeams 1 are located in a plurality of element support blocks 130.

[0105] In this case, the single crossbeam 1 is arranged between a pair of support ribs 131 of each of the plurality of element support blocks 130 and is inserted between a pair of support ribs 131 through a tapered surface 135 of the single pair of support ribs 131. Here, the single crossbeam 1 is in a state in which both surfaces are in close longitudinal contact with the support surfaces 133 of the single support ribs 131.

[0106] In the embodiment of the present invention, the clamping handle 153 of at least one clamping device 150 is then rotated upwards. The clamping body 155 is then rotated downwards by the clamping handle 153, and the clamping block 157 presses on the top of the crossbeam 1 and clamps the crossbeam 1 firmly by the clamping body 155.

[0107] In this state, in the embodiment of the present invention, one of the plurality of cores 100, which are aligned in the plurality of core alignment blocks 230, is located in the plurality of core guide blocks 210 on the core alignment frame 190. The one core 100 is located on the core guide roller 213 between the two guide bodies 211 in the longitudinal direction of each of the plurality of core guide blocks 210.

[0108] In this case, the second stopper 215 of the rearmost core guide block 210 stops the first locking projection 17 and the second locking projection 29, which are formed longitudinally on the other end section of the first core block 10 and the second core block 20 of the single core 100, respectively. Furthermore, the single core 100 is located on the same line as the closed section 3 of the crossbeam 1, while being supported by the plurality of core guide blocks 210.

[0109] In the embodiment of the present invention, a core 100 located in the plurality of core guide blocks 210 is pushed, and the one core 100 is moved by the core guide block 213 of the plurality of core guide blocks 210 to a front side (one side in the longitudinal direction) of the core mounting frame 110.

[0110] As a result, the single core 100 is inserted into the closed section 3 of the crossbeam 1 by the plurality of core guide blocks 210, and an end section in the longitudinal direction of the single core 100 is located in the width direction between the two support bodies 171 by the core support roller 173 of the core support block 170.

[0111] Here, the first stopper 175 of the core support block 170 stops the first locking projection 17 and the second locking projection 29, which are formed on an end section in the longitudinal direction of the first core block 10 and the second core block 20 of the one core 100.

[0112] Furthermore, the other end section is located in the core guide block 210 mounted in a rear side of the core mounting frame 110 in the longitudinal direction of the first core block 10 and the second core block 20 respectively.

[0113] While a core 100 is inserted into the closed section 3 of the crossbeam 1 as described above, the clamping handle 153 of at least one clamping device 150 is rotated downwards in the embodiment of the present invention. Then the clamping body 155 is rotated upwards by the clamping handle 153, and the clamping block 157 is separated from the top of the crossbeam 1 and releases the clamping of the crossbeam 1 by the clamping body 155.

[0114] In the embodiment of the present invention, the crossbeam 1, into which the core 100 is inserted, is moved to a welding device (not shown) and fixed to the welding device.

[0115] When both end sections of a core 100 are pressed downwards in the welding device, the first core block 10 is then moved away from the second core block 20, while the first sliding surface 11 of the sliding element 15 slides downwards along the second sliding surface 21 of the second core block 20.

[0116] As a result, the first core block 10 presses with the first contact surface 13 on a surface inside the closed section 3 of the crossbeam 1 and presses with the second contact surface 23 on the other surface inside the closed section 3 of the crossbeam 1.

[0117] If the laser beam is directed at the connection section of the part 7 to be mounted using a laser welding gun (not shown) of a welding robot (not shown), while the part 7 to be mounted is in close contact with both outer surfaces or with one outer surface, then in the embodiment of the present invention the part 7 to be mounted can be laser welded to both outer surfaces or to one outer surface of the cross member 1.

[0118] According to the embodiment of the present invention described so far, the core 100 can be inserted into the closed section 3 of the crossbeam 1 and the core 100 can press on both surfaces inside the closed section 3 of the crossbeam 1.

[0119] If the part 7 to be mounted is connected to the crossbeam 1 by laser welding, the thermal deformation of the crossbeam 1 by the laser beam with the core 100 can therefore be minimized in the embodiment of the present invention.

[0120] As a result, in the embodiment of the present invention, the formation of a gap between the crossbeam 1 and the part 7 to be mounted can be prevented, and the quality of the laser welding of the part 7 to be mounted on the crossbeam 1 can be further improved.

[0121] Although the preferred embodiments, examples and embodiments of the present invention are described by the above description, the present invention is not limited thereto, and various modifications can be made within the scope of the claims and in the area of ​​the detailed description and the accompanying drawings of the invention, and this too naturally falls within the scope of the present invention. Reference symbol list 1 crossbeam 5 carriers 10 first core block 13 first contact surface 17 first locking projection 21 second sliding surface 25 coupling groove 30 first magnetic element 40 second magnetic element 100 cores 130 element support block 133 Support surface 150 clamping device 153 Clamping handle 157 Terminal block 171 Support bodies 175 first stopper 200 core fastening device 211 Guide bodies 215 second stopper 231 alignment bodies 3 closed section 7. Part to be assembled 11 first sliding surface 15 sliding element 20 second core block 23 second contact surface 29 second locking projection 31 first magnetic bolt 41 second magnetic bolt 110 core mounting frames 131 Support rib 135 tapered area 151 Fixatives 155 clamping bodies 170 core support block 173 Core support roller 190 Core Alignment Framework 210 Core guide block 213 Core leadership role 230 Core alignment block B bolts

Claims

[1] Assembly system of a battery housing for an electric vehicle, comprising a core (100) for mounting a cross member (1) mounted on a battery housing and a core fastening device (200) for fastening the core (100), wherein the core (100) can be inserted into a closed section (3) with a closed cross-section in the longitudinal direction of the cross member (1) in order to laser weld at least one part (7) to be mounted to the cross member (1) of the battery housing with the closed section (3), comprising: encompassing the core (100): a first core block (10) with a first sliding surface (11) which is arranged on one side of the first core block (10) and is inclined in the width direction of the first core block (10) from one side to the other of the first core block (10), so that the first core block (10) has different width-directed thicknesses on the top and bottom sides; a second core block (20) with a second sliding surface (21) arranged on one side of the second core block (20) and inclined in the width direction of the second core block (20) from one side to the other of the second core block (20), so that the second core block (20) has different width-directed thicknesses on the top and bottom sides in order to slide upwards and downwards on the corresponding first sliding surface (11) of the first core block (10); a plurality of first magnetic elements (30) mounted on a surface of the first core block (10), the first core block (10) having a sliding element (15) connected to one surface of the first core block (10) and having a first sliding surface, the sliding element (15) being fastened to one surface of the first core block (10) by at least one bolt (B), each of the plurality of first magnetic elements (30) being attached to one surface of the first core block (10) and fastened by a first magnetic bolt (31); and a plurality of second magnetic elements (40) mounted on a surface of the second core block (20) opposite one surface of the first core block (10), each of the plurality of second magnetic elements (40) having a different polarity than each of the plurality of first magnetic elements (30) and attached to one surface of the second core block (20) and fastened by a second magnetic bolt (41); a first contact surface (13) formed on the surface of the first core block (10) opposite the first sliding surface (11) and pressing against a surface of the closed section (3) of the crossbeam (1); and a second contact surface (23) which is formed on the surface of the second core block (20) opposite the second sliding surface (21) and which presses on another surface of the closed section (3) of the crossbeam (1); comprising a core mounting frame (110): a plurality of element support blocks (130) mounted forwards and backwards on a top side of the core mounting frame (110) to support the crossbeam (1) longitudinally; at least one clamping device (150) mounted on the top of the core mounting frame (110) that clamps the cross member (1); and a core support block (170) which is mounted in a front of the core mounting frame (110) to support an end section in the longitudinal direction of the core (100) fitted into the closed section (3) of the crossbeam (1). [2] Assembly system according to claim 1, wherein a coupling groove (25) with which the sliding element (15) is connected is formed on one surface of the second core block (20), and the second sliding surface (21) is formed on the coupling groove (25). [3] Assembly system according to claim 1, wherein first locking projections (17) are formed on both end sections in the longitudinal direction of the first core block (10) and second locking projections (29) are formed on both end sections in the longitudinal direction of the second core block (20). [4] Assembly system according to claim 1, wherein: Each of the multiple element support blocks (130) has a pair of support ribs (131) which each support both surfaces in the width direction of the crossbeam (1). [5] Assembly system according to claim 4, wherein: Each of the pair of supporting ribs (131) is provided in a shape that becomes thicker from top to bottom. [6] Mounting system according to claim 5, wherein each of the pair of support ribs (131) comprises: a support surface (133) which supports each of the two surfaces in the width direction of the crossbeam (1), and a tapered surface (135) that connects the top surface and the support surface (133). [7] Mounting system according to claim 1, wherein the at least one clamping device (150) comprises: a fixing means (151) which is attached to the core mounting frame (110), a clamping handle (153) which is rotatably mounted in the fixing device (151) and optionally connected to the fixing device (151), a clamping body (155) connected to the clamping handle (153), and a clamping block (157) which is attached to the clamping body (155). [8] Assembly system according to claim 1, wherein the core support block (170) comprises: a core support roller (173) which is rotatably connected to both support bodies (171) opposite each other in the width direction, and a first stopper (175) which is connected to upper sections of the two support bodies (171). [9] Assembly system according to claim 1, further comprising: a core alignment frame (190) which is mounted in such a way that it is connected to the core mounting frame (110); a plurality of core guide blocks (210) mounted in a rear of the core mounting frame (110) to support the other end section longitudinally of the core (100) fitted into the closed section (3) of the cross member (1), and mounted at a distance from each other forwards and backwards in the core alignment frame (190) to guide the core (100) to be mounted on the closed section (3) of the cross member (100) to the closed section (3); and a plurality of core alignment blocks (230) mounted in the core alignment frame (190) to align a plurality of cores (100) to be attached to the closed section (3) of the crossbeam (100). [10] Assembly system according to claim 9, wherein: Each of the core guide blocks (210) comprises a core guide roller (213) which is rotatably connected to both guide bodies (211) opposite each other in the width direction. [11] Assembly system according to claim 10, wherein: a second stopper (215) is mounted in a core guide block (210) which corresponds to the other end section in the longitudinal direction of the core (100) among the plurality of core guide blocks (210). [12] Assembly system according to claim 9, wherein: Each of the multiple core alignment blocks (230) comprises both alignment bodies which are arranged opposite each other in the width direction. [13] Assembly system according to claim 11, wherein: Each of the multiple core alignment blocks (230) is connected to one end section, the other end section and between the one end section and the other end section of the core (100) in the longitudinal direction.

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