DE102012101444A1 - Blank for producing a housing and method for producing a housing from such a blank - Google Patents

Abstract

The invention relates to a blank (10) for producing a housing (24), wherein the blank (10) consists of a plate-shaped material (11), wherein the blank (10) has a bottom (12) and a first and a second pair (10). 14, 16) of walls (18), each wall (18) being bendable and elevatable about each fold line (20), the walls (18) of each pair (14, 16) facing each other in the raised position, each fold line (20) in the form of a depression (38) is formed in the plate-shaped material (11), each wall having two opposite rectilinearly extending edge surfaces (22, 49, 50)), each of the edge surfaces (22, 49, 50) is angled to form miter joints. The invention further relates to a method for producing a housing from such a blank and a use of the blank for producing a battery housing.

Description

Background of the invention

The present invention relates to a blank for producing a housing and to a method for producing a housing from such a blank.

Box-shaped structures, in particular housings are generally produced from a plurality of plates whose corners or edges consist of additionally provided profile elements or components. In particular, the profile elements or components may be edge profiles, corner nodes, connecting elements, fastening elements, sealing elements and / or sealing compounds. The work required to produce such a housing, which in addition to the cutting of the plates, the shoring of the components or profile elements including assembly is very high, in particular due to the large number of components or profile elements to be installed.

Underlying task

It is an object of the present invention to provide a blank for producing a housing, from which a housing can be produced in a simple and practical manner, and to provide a method for producing a housing from such a blank.

Inventive solution

This object is achieved with a blank for producing a housing with the features of claim 1 and with a method having the features of claim 7.

The blank according to the invention for producing a housing consists of a plate-shaped material or of a continuous plate-shaped material. The blank can be converted from an unfolded state into a folded state for producing the housing.

The blanks formed from the plate-shaped material have a bottom and a first and a second pair of walls. Each wall is for folding or for transferring the unfolded state in the folded state by at least one fold line pivotally or bendable, so by bending or pivoting about the at least one fold line in the folded state can be transferred. The walls of each pair are in the folded state opposite to each other or the walls of each pair are arranged opposite one another in the folded state.

Each fold line is formed in the form of an indentation in the plate-shaped material, wherein the indentation of two opposite side surfaces or facing side surfaces is limited, which extend in the longitudinal direction of the fold line, and wherein the side surfaces by pivoting about the fold line in planar contact with each other or wherein the side surfaces can be brought into contact with each other in a planar contact with one another by the pivoting provided for folding around the fold line, so that the side surfaces thus have surface contact with one another in the folded state.

Each wall has two opposite rectilinearly extending edge surfaces. Each of the edge surfaces is angled, wherein for forming Gehrungsverbindungen between the walls in the folded state of the blank each angled edge surface of the walls of the first pair, each having an angled edge surface of a wall of the second pair by the folding of the blank or the transfer to the folded state can be brought into area contact. The two edge surfaces, which can be brought into contact with each other in surface contact, are the edge surfaces of two walls in each case, which are to be connected to each other in the folded or upright state by a corner joint in the form of the miter joint.

From the blank according to the invention is a simple and practical way a housing, in particular a stable housing produced by simply vorzunehmendes transfer of the blank from the unfolded state in the folded state and connecting the brought in the transfer into surface contact side surfaces and edge surfaces. From a complex use of additional profile elements or components, in particular for the corners or edges of the housing, as is the case with known solutions, can be advantageously dispensed with, accompanied by a substantial reduction of the workload or assembly work for the preparation of the housing.

In a practical embodiment, the blank has a lid which is connected to one of the walls via at least one fold line or via at least one further fold line. The cover or the closure element is provided for producing a closable housing, wherein the closure element or the cover over the fold line or the further fold line with the wall is connected or connected and this is bendable or pivotable.

In a particularly preferred embodiment, the plate-shaped material is a sandwich plate material or a multi-layer plate-like material having a first and a second cover layer of a thermoplastic material and between the cover layers arranged filling material, each fold line in shape a depression in the first cover layer is formed, and wherein each angled edge surface is an edge surface of the first cover layer.

The thermoplastic material may preferably be polypropylene (PP) or polyphenylene sulfide (PPS). In particular, polypropylene is characterized by good processability. The thermoplastic material also polyamide (PA), in particular polyamide 6 and polyamide 6.6, polyethylene (PE), POM (polyoxymethylene), polyethersulfone (PES), polyetheretherketone (PEEK), polyetherimide (PEI), polyethylene terephthalate (PET), comparable technical or High temperature plastic materials or combinations of the aforementioned plastic materials include.

The thermoplastic plastic material may have a fiber reinforcement. The fiber reinforcement of the plate-shaped material may consist partially or completely of continuous fibers, which may be unidirectionally oriented or formed as a fabric. The fiber reinforcement can be formed by glass fibers, carbon fibers, aramid fibers, basalt fibers, mineral fibers, fibers from renewable resources, metal fibers and / or by polymer fibers.

From the blank according to the above particularly preferred embodiment, a housing, in particular a stable and sealed housing can be produced by simply vorzunehmendes transfer of the blank from the unfolded state in the collapsed state cohesively connecting the foldable by the folding in planar contact side surfaces in a simple and practical manner and edge surfaces, by fusing the thermoplastic resin material of the side surfaces and edge surfaces and bringing the side surfaces together and the edge surfaces into contact with each other by folding them into the folded state. In this respect, the filling material is more preferably a thermosetting foam material, such as e.g. Polyurethane. A thermoset foam material advantageously collapses only with great difficulty, in particular if the thermoplastic plastic material of the first and / or second cover layer is heated to melt to a temperature at which the thermoplastic plastic material is plastically deformable. The thermoset foam material is advantageous even at this temperature dimensionally stable and does not collapse.

To achieve a bendability or pivotability that is simple to perform, the pressed-in region of the first cover ply has a contact with the second cover ply during the indentation or during each indentation.

In a further practical embodiment, the blank has a lid arranged between the walls of the second pair, one wall of the second pair being connected to the lid via a first fold line, the other wall of the second pair being connected via a second fold line, which is parallel to the first fold line, connected to the bottom and connected to the lid via a third fold line parallel to the first and second fold line and located between the first and second fold line, and wherein a wall of the first Pair is connected to the ground via a fourth fold line, and wherein the other wall of the first pair is connected to the floor via a fifth fold line parallel to the fourth fold line. With this further practical embodiment, a housing which can be closed by a cover or a closure element can be produced in a simple and practical manner.

Preferably, in this further practical embodiment, a fastening element for fastening the base to a bearing surface is integrally formed on an edge region of the bottom opposite the second fold line. About the fastener, the housing or the bottom of the housing in a simple and practical manner can be fastened to the support surface. The support surface may be e.g. to act as a support surface of an electric vehicle to which the housing, e.g. is formed in the form of a housing for the traction battery of the electric vehicle, can be fastened via the fastening element.

• (A) Überführen des Zuschnitts von dem auseinandergeklappten Zustand in den zusammengeklappten Zustand
• (B) Herstellung einer Verbindung zwischen den durch das Überführen des Zuschnitts in den zusammengeklappten Zustand in flächigen Kontakt zueinander gebrachten Seitenflächen bei jeder Eindrückung, und
• (C) Ausbilden von Gehrungsverbindungen zwischen den Wänden durch Verbinden der durch das Überführen des Zuschnitts in den zusammengeklappten Zustand in Kontakt gebrachten Randflächen.

The method according to the invention for producing a housing from a blank according to the invention comprises the following steps:

• (A) Transferring the blank from the unfolded state to the folded state
• (B) establishing a connection between the side surfaces brought into flat contact with each other by the transfer of the blank in the folded state at each indentation, and
• (C) forming miter joints between the walls by joining the edge surfaces brought into contact by the transfer of the blank into the folded state.

The steps A, B and C according to the invention can be carried out in a simple and practical manner and therefore make it possible to produce a housing in a simple and practical manner, which can be designed in particular in the form of a battery housing or in the form of a battery housing for a traction battery of an electric vehicle. From a complex use of additional profile elements or components in particular for the corners or edges of the housing, as is the case with known solutions, can be advantageously dispensed with, along with a significant reduction of the workload or assembly work for the preparation of the housing.

By naming the steps with the letters A, B and C, no binding or exclusive binding to a chronological order is pursued. The letters merely serve to designate or identify the steps and therefore in particular facilitate the reference. According to the invention, steps B and C may take place after step A. However, it is also possible that already by the bringing into contact of the side surfaces or edge surfaces during the transfer of the blank from the unfolded state in the folded state, a connection is made or the formation of a compound is initiated or initiated, as e.g. may be the case with an adhesive bond, wherein the adhesive was applied to the side surfaces or edge surfaces prior to transfer. As such, steps B and C may be e.g. also occur at the same time or substantially simultaneously with step A.

Step C may be performed after step B, or step B may be performed after step C. Furthermore, step B may be performed during step C or at the same time or substantially simultaneously with step C.

In a practical embodiment of the method according to the invention, the side surfaces are welded or glued together in step B to make the connection. If the side surfaces are glued to each other, at least one of the two side surfaces of each fold line or indentation may preferably be provided with an adhesive at least partially before the transfer according to step A, wherein in this case the production of the connection by bringing the side surfaces in the collapse or Conversion takes place in the folded state or wherein the formation of the connection takes place immediately after the production of the planar contact of the side surfaces.

Preferably, the edge surfaces can also be welded or glued together in step C for bonding. If the edge surfaces are glued to each other, at least one edge surface can be provided at least in regions with an adhesive, in which case the connection is made by bringing the edge surfaces into contact when folding or transferring into the folded state or forming the connection takes place immediately after the production of the surface contact of the edge surfaces.

By a weld or a bond, a very strong or stable connection can be provided, along with the creation of a very stable or solid housing.

Another practical embodiment of the method according to the invention relates to producing a housing from a blank in which the plate-shaped material is a sandwich panel material having a first and a second cover layer of a thermoplastic material and between the cover layers arranged filling material, wherein each fold line in the form of a Indentation is formed in the first cover layer, and wherein each angled edge surface is an edge surface of the first cover layer.

The filler material of the sandwich panel material is preferably a polymeric foam material. In particular, the polymeric foam material may be a thermoset foam material or a high temperature thermoplastic foam material.

A thermoset foam material is characterized by a very high temperature resistance, which is particularly advantageous when driving an electric vehicle in the upper power range of the electric vehicle, where high operating temperatures of the traction battery are present or arise when the traction battery is within a housing of a blank according to the invention. Also, a foam material made of a high-temperature thermoplastic advantageously has a high temperature resistance. The polymeric foam material may additionally have at least partially a metallization. In particular, copper, nickel, tin, silver, gold, cobalt or combinations of the abovementioned materials are suitable as the material for the metallization. In addition to a thermal insulation, an effective shielding against electromagnetic radiation is advantageously achieved.

In a further preferred embodiment, the filling material may be a fleece and / or woven fabric, preferably of conductive or conductive coated material. The nonwoven and / or woven fabric may in particular be a polyester fabric and / or polyester nonwoven, preferably with an at least partial metallization. In particular, copper, nickel, tin, silver, gold, cobalt or combinations of the abovementioned materials are suitable as the material for the metallization. The fabric and / or fabric may be dipped in various (metal) baths and / or galvanic baths to achieve metallization. In addition to a thermal insulation, a shield against electromagnetic radiation of the housing or the battery housing is advantageously achieved. The fleece and / or fabric may have different densities and / or weaves to adjust the flexibility and / or shielding effect against electromagnetic radiation. It is also conceivable to provide a layer structure of purely thermal insulating fleece and / or fabric and metallized fleece and / or fabric for the filling material.

Preferably, the filler material may also be formed in the form of a metallic foam, which is characterized by a particularly high temperature resistance. In this case, the metallic foam particularly preferably consists at least partially or entirely of a titanium-based material or another high-alloyed metal material (for example high-alloyed chromium-nickel steel) with a then advantageous low thermal conductivity. A metallic foam advantageously makes it possible, in addition to a thermal insulation, to simultaneously achieve an improved electromagnetic shielding (electromagnetic compatibility - in short EMC) of the housing or of the battery housing.

The filling material can also have a honeycomb structure or a honeycomb-shaped structure for substantially increasing the stability or strength.

In a preferred embodiment, the plate-shaped material may comprise a sheet-like element, which may be a metal foil, which allows effective shielding against electromagnetic radiation. Here, the metal foil may preferably be a copper foil or an aluminum foil or a nickel foil or a silver foil or a gold foil or a foil of an iron base material (for example, a stainless steel alloy).

In a further preferred embodiment, the planar element is a metallic net or in the form of a metallic net. A metallic net can be made with a very low weight while allowing effective shielding of electromagnetic radiation. More preferably, the metallic mesh comprises a plurality of meshes, wherein the meshes are bounded by metallic mesh yarns, each mesh having a mesh area with an areal size falling within a range of 0.0025 mm ² to 4 mm ² , and wherein the Thickness of the net threads is within a range of 0.05 mm to 0.5 mm. Such a trained metallic network advantageously allows a very effective shielding against electromagnetic radiation in a frequency range up to about 3 GHz, so that at an advantageous very low weight of the metallic network at the same time a very effective shielding is possible up to high frequency ranges. The metallic mesh, which may be formed in particular in the form of a fabric, may preferably consist of copper, aluminum, nickel, silver, gold or an iron-based material (eg a stainless steel alloy).

In a practical embodiment, the planar element is at least partially flat on the plate-shaped material, wherein particularly preferably, the planar element is in the form of a layer which rests flat on the plate-shaped material and is materially connected to the plate-shaped material.

The layer is preferably applied by means of a sputtering method, painting method and / or sputtering method. These methods make it possible to practically apply a layer that is particularly suitable for mass production and has a very uniform or substantially uniform layer thickness. In particular, the layer may also be a layer applied by means of a galvanic process. In particular, with a galvanic process, a very uniformly formed layer can be applied with a substantially constant layer thickness. If a painting process is used, the layer may be e.g. consist of a copper enamel or other electrically conductive lacquers with metallic admixtures (e.g., particles, flakes, powders). The layer can also be applied by a flame spraying process.

All of the aforementioned planar elements may be electrically connected to the ground potential of an electric vehicle (e.g., to the body or vehicle frame). The electrically conductive connection is preferably realized directly via the planar element or via a metallic conductor strip. An electric vehicle is to be understood as any vehicle which is operated at least in an assistive manner by means of an electric motor.

For producing the housing from this blank, in this further practical embodiment of the method according to the invention for producing a material connection of the side surfaces in step B before step A at least one side surface of each indentation for melting thermoplastic material of the side surface is at least partially heated, wherein the cohesive connection by the contacting of the side surfaces during folding of the blank or during the transfer of the blank is made in the folded state, or wherein the cohesive connection by contacting or immediately after contacting the side surfaces forms or the formation the cohesive connection is initiated or initiated, wherein prior to step A, at least one of the Ra, which can be brought into contact with one another by the folding or transferring into the folded state, is initiated ndflächen for melting thermoplastic material of the edge surface is at least partially heated, wherein for forming the miter joints according to step C, the edge surfaces are connected by the contact of the edge surfaces when folding or transferring in the folded state walls cohesively.

By applying this further practical embodiment of the method according to the invention, a very stable or rigid and also dense housing can be created or produced in a simple and practical manner, in particular by forming the integral connections between the side surfaces and forming the integral connections between the edge surfaces.

Preferably, a rod-shaped heating element or a plate-shaped heating element or a high-energy radiation can be used to heat the thermoplastic material. The high-energy radiation may in particular be laser radiation or plasma radiation or at least one electron beam. By a rod-shaped heating element or a plate-shaped heating element or a high-energy radiation heating or melting of the thermoplastic material is possible in a practical manner.

The invention further relates to the use of a blank according to the invention for producing a battery housing, preferably a battery housing for a traction battery of an electric vehicle. To produce a battery housing, which may preferably be a battery housing for a traction battery of an electric vehicle, the use of a blank according to the invention offers the advantage of a practical and simple manner to make production. In particular, a blank may be used to make the battery case, in which the plate-shaped material is a sandwich panel material having first and second topsheets of a thermoplastic plastic material and filler material disposed between the topsheets, each fold line being in the form of an indentation into the first topsheet is formed, and wherein each angled edge surface is an edge surface of the first cover layer. By using or using this blank can be created or produced in a simple and practical way, a very stable or rigid and dense housing, in particular by the possible formation of cohesive connections between the side surfaces and possible formation of cohesive connections between the edge surfaces by fusing the thermoplastic plastic material of the side surfaces and edge surfaces and bringing the fused edge surfaces into contact with each other and bringing the fused side surfaces into contact with each other.

Advantageously, when using the blank according to the invention for producing a battery housing - preferably a battery housing for a traction battery of an electric vehicle - be apart from additional sealing measures. It is particularly advantageous that only a very small space requirement is required when transporting the blank. The blank can therefore be delivered to a customer with little effort or at the expense of low transport costs, which can produce the housing or battery case in a practical and simple way from the blank.

Brief description of the drawings

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. It shows:

1 1 is a schematic plan view of a first embodiment of a blank according to the invention for producing a housing,

2 3 shows a schematic three-dimensional view of an exemplary embodiment of a housing produced from a blank according to the invention,

3 a schematic sketched sectional view of a portion of a second embodiment of a blank according to the invention, wherein the region shown comprises a fold line and a portion of the bottom and a wall, which are interconnected via the fold line are, wherein the blank consists of a sandwich plate material, and wherein the cut or the cutting plane is oriented perpendicular or normal to the longitudinal direction of the fold line,

4 the sectional view of 3 together with a rod-shaped heating element,

5 the area of 3 in almost completely folded state of the blank together with the rod-shaped heating element,

6 the area of 3 when fully folded state of the blank and at interconnected side surfaces of the fold line,

7 FIG. 2 a schematic sketch-like sectional view of an edge region of a wall of the second exemplary embodiment with an angled edge surface provided on the first cover layer, FIG.

8th a schematic sketch-like sectional view of an edge region of a wall of the first wall pair of the second embodiment with an angled first edge surface provided on the first cover layer together with an edge region of a wall of the second wall pair of the second embodiment with an angled on the first cover layer angled second edge surface wherein here the blank is in the almost completely folded state, and further wherein a rod-shaped heating element is arranged between the first and the second edge surface,

9 the edge areas of 8th when completely folded state of the blank, wherein the first and the second edge surface are integrally connected to each other.

10 a schematic plan view of a third embodiment of a blank according to the invention for producing a housing,

11 a schematic sketched sectional view of a portion of a housing, made of the in 10 illustrated third embodiment of the blank according to the invention, and

12 a schematic sketched sectional view of a portion of a housing, made of a fourth embodiment of a blank according to the invention.

This in 1 in a schematic plan view of the first embodiment of a blank according to the invention 10 for making a housing is a blank 10 made of a plate-shaped material 11 or a continuous plate-shaped material 11 consists. The cut 10 is convertible from an unfolded state to a collapsed state for producing the housing. The 1 shows the cut 10 in the unfolded state.

The illustrated cut 10 has a floor 12 , a first and a second pair 14 . 16 of walls 18 and four fold lines 20 on. Every wall 18 is to fold around a respective fold line 20 pivotable or bendable or elevatable. In the folded state of the blank 10 are the walls 18 of the first couple 14 arranged opposite each other. Further, in the folded state of the blank 10 also the walls 18 of the second pair 16 arranged opposite each other. The floor 12 and the walls 18 are through the fold lines 20 demarcated and connected to each other. Every fold line 20 is formed in the form of a depression (in 1 and 2 not shown).

Every wall 18 has two opposite and rectilinearly extending edge surfaces 22 on. Each of the edge surfaces 22 is angled (in 1 not shown in detail). For forming corner joints in the form of miter joints between the walls 18 in the raised state of the walls 18 or in the folded state of the blank 10 is any angled edge surface 22 the walls 18 of the first couple 14 each with an angled edge surface 22 a wall 18 of the second pair 16 can be brought into contact with each other. The two contact surfaces can be brought into contact 22 are edge surfaces 22 in the folded state of the blank 10 facing each other. Furthermore, the two edge surfaces which can be brought into surface contact with one another are 22 around the edge surfaces 22 of two walls each 18 in the folded state of the blank 10 By a corner joint in the form of miter connection are to be connected to each other or are connectable.

The 2 shows a schematic three-dimensional representation of an embodiment of a housing made of a blank according to the invention 24 , For this purpose, the blank was previously transferred from an unfolded state in the folded state. The housing 24 has four corner joints 26 in the form of the inventively provided Miter connections (not shown here) on. Next to the four corners or corner joints 26 shows the case 24 four edges 28 on, by pivoting or swiveling up the walls 18 to the Transfer to the folded state around the four fold lines 20 were provided.

At all in the 3 to 9 sketchy sectional views shown are sectional views of areas or partial areas of a second embodiment of a blank according to the invention.

The 3 shows a schematic sectional view of a blank area of a fold line 20 and a portion of the soil 12 and a wall 18 comprising, wherein the portions over the fold line 20 are interconnected or related to each other. The section or section plane shown here is rectangular or normal to the longitudinal direction of the fold line 20 oriented or arranged. The blank consists of a sandwich panel material 30 or a multi-layered plate-shaped material 30 , The sandwich panel material or sandwich material 30 has a first and a second cover layer 32 . 34 made of a thermoplastic material 33 and between the cover layers 32 . 34 arranged filling material 36 in the form of a polymeric foam material 36 on. The fold line 20 is in the form of a depression 38 in the first cover layer 32 trained, being at the indentation 38 the indented area 40 the first cover layer 32 a contact with the second cover layer 34 having. The indentation 38 is from two side surfaces 42 or two side edges 42 or two flanks 42 limited, which are facing each other and facing each other and extending in the longitudinal direction of the fold line 20 extend. The side surfaces 42 are by panning the wall 18 around the fold line 20 can be brought into surface contact with each other.

The 4 shows the sectional view of 3 together with a rod-shaped heating element 44 , The 5 shows the cropping area of the 3 in almost completely folded state of the blank together with the rod-shaped heating element 44 , The 6 shows the cropping area of the 3 when fully folded state of the blank and interconnected side surfaces 42 the fold line 20 or indentation 38 ,

The 4 to 6 serve to illustrate the steps A and B of an embodiment of the method according to the invention. 4 illustrated here first that for producing a material connection of the side surfaces 42 in step B before step A, each side surface 42 the indentation 38 for melting thermoplastic material 33 the side surface 42 by means of the rod-shaped heating element 44 or the rod-shaped heating medium 44 is heated at least partially. The respective positions of the heating element 44 for heating the side surfaces 42 are in 4 shown in the form of dotted lines. In step A - which comprises transferring the blank from the unfolded state to the folded state - the cohesive connection is made by bringing the side surfaces into contact 42 by pivoting the wall 18 in the form of indentation 38 formed fold line 20 or the formation of the same initiated or initiated, along with the creation of a very stable and solid cohesive connection 46 or welded connection 46 , This is in 6 illustrates which the finished cohesive connection 46 (illustrated in the form of crosses).

The 5 shows the cropping area of the 3 in almost completely folded state of the blank together with the rod-shaped heating element 44 , The 5 illustrates that for the melting of thermoplastic material 33 the side surfaces 42 by means of the rod-shaped heating element 44 particularly preferably no melting of the side surfaces 42 by taking the in 4 dashed positions shown is to make. Rather, the rod-shaped heating element 44 or heating medium 44 particularly preferably also remain in one position or remain substantially in one position and the wall 18 can be pivoted or pivoted while retaining this position almost completely to take the collapsed state, whereby the melting of the thermoplastic material 33 a contact of the side surfaces 42 to the rod-shaped heating element 44 is manufactured or provided.

With the rod-shaped heating element 44 is conveniently a heating or melting of the thermoplastic material 33 for forming the cohesive connection 46 possible.

The 7 shows a schematic sketched sectional view of a border area 48 a wall 18 of the first couple 14 of the second embodiment with one on the first cover layer 32 provided angled edge surface 22 used to form one of four miter joints with an angled edge face 22 a wall 18 of the second pair 16 can be brought into surface contact, in the superscript state of the walls 18 ,

The 8th shows a schematic sketched sectional view of a border area 48 a wall 18 of the first couple or wall pair with one at the first cover layer 32 provided angled first edge surface 49 together with a border area 48 a wall 18 of the second pair or wall pair with one on the first cover layer 32 provided angled second edge surface 50 , In this illustration, the blank is in the almost completely folded state and between the first and the second edge surface 49 . 50 is a rod-shaped heating element 44 arranged.

The 9 shows the border areas 48 of the 8th when completely folded state of the blank, wherein the first and the second edge surface 49 . 50 are cohesively connected to each other. In the in the 8th and 9 The section shown is a section (or a sectional plane) which is oriented or arranged parallel to the ground.

The 8th and 9 serve to illustrate the steps A and C of the embodiment of the method according to the invention. 8th In this case, first of all, it is illustrated that, before step A of the method according to the invention, the edge surfaces which can be brought into contact with one another by folding or transferring them into the folded state 49 . 50 - where each angled edge surface 49 . 50 an edge surface of the first cover layer 32 is - for melting thermoplastic material 33 the edge surfaces 49 . 50 by means of the rod-shaped heating element 44 be partially heated. For forming a corner joint in the form of a miter joints 52 according to step C, the edge surfaces 49 . 50 by bringing the edge surfaces into contact 49 . 50 when folding or swiveling the walls 18 cohesively connected. The finished miter connection 52 is in 9 illustrates which the ready made miter joint 52 shows (the cohesive connection 46 is in 9 illustrated in the form of crosses).

In the in the 3 to 9 partially illustrated second embodiment of a blank according to the invention is a blank according to the invention which is used for producing a battery case for a traction battery of an electric vehicle. The use of this blank for producing a battery housing for a traction battery of an electric vehicle offers the advantage of a practical and simple way to make a very stable and also dense battery case, in particular by the possible formation of cohesive connections between the side surfaces 42 and possible formation of cohesive connections between the edge surfaces 22 . 49 . 50 ,

The 10 shows a schematic plan view of a third embodiment of a blank according to the invention 10 for producing a housing. The cut 10 has a lid 54 on the between the walls 18 a second pair 16 of two couples 14 . 16 of walls 18 is arranged, with a wall 18 of the second pair 16 over a first fold line 56 with the lid 54 is connected, the other wall 18 of the second pair 16 over a second fold line 58 parallel to the first fold line 56 runs, with the ground 12 is connected and via a third fold line 60 parallel to the first and second fold lines 56 . 58 runs and between the first and second fold line 56 . 58 is arranged with the lid 54 is connected, and being a wall 18 of the first couple 14 of walls 18 over a fourth fold line 62 with the ground 12 is connected, and the other wall 18 of the first couple 14 over a fifth fold line 64 parallel to the fourth fold line 62 runs, with the ground 12 connected is. At one of the second fold line 58 opposite edge area of the floor 12 is a fastener 66 for fixing the floor 12 molded on a support surface.

The 11 shows a schematic sketched sectional view of a portion of a housing 24 , made from the in 10 illustrated third embodiment of the blank according to the invention 10 , The housing 24 shows the lid 54 , the ground 12 , Walls 18 - of which in the 11 only one is shown - and the fastener 66 for fixing the floor 12 on a support surface. To attach the fastener 66 on the bearing surface are openings 68 (see also 10 ) provided in which sleeves 70 for receiving a fastening screw (not shown here) are added. In the in the 11 The section shown is a section with a section plane perpendicular to the ground 12 , Also in this embodiment, the blank is made 10 from the sandwich panel material 30 or the multilayer plate-shaped material 30 , In the 11 shown wall 18 has for producing a cohesive Gehrungsverbindung 72 with the ground 12 an angled edge surface 74 on, being at the miter connection 72 the edge surface 74 a flat contact with one on the ground 12 provided angled edge surface 76 having.

The 12 shows a schematic sketched sectional view of a portion of a housing 24 manufactured from a fourth embodiment of a blank according to the invention 10 from the sandwich panel material 30 , The housing 24 has a lid 54 , a floor 12 and walls 18 of which in the 12 only one is shown. The lid 54 is connected via a fold line with one of the walls (not shown here). The section shown here is a section with a cutting plane perpendicular to the ground 12 , The Indian 12 shown lid 54 has for producing a cohesive Gehrungsverbindung 72 with the wall shown 18 an angled edge surface 74 on, being at the miter connection 72 the edge surface 74 a flat contact with one on the wall 18 provided angled edge surface 76 having.

Claims (12)

Cut ( 10 ) for producing a housing ( 24 ), the blank ( 10 ) of a plate-shaped material ( 11 ), wherein the blank for producing the housing ( 24 ) is convertible from an unfolded state to a collapsed state, wherein the blank ( 10 ) a floor ( 12 ) and a first and a second pair ( 14 . 16 ) of walls ( 18 ), each wall ( 18 ) for folding around at least one fold line ( 20 ) is pivotable, the walls ( 18 ) one pair each ( 14 . 16 ) in the folded state, wherein each fold line ( 20 ) in the form of a depression ( 38 ) in the plate-shaped material ( 11 ), wherein the indentation ( 38 ) of two opposite side surfaces ( 42 ) is limited, which in the longitudinal direction of the fold line ( 20 ), and wherein the side surfaces ( 42 ) by pivoting the wall ( 18 ) around the fold line ( 20 ) are in surface contact with each other, each wall ( 18 ) two opposite rectilinearly extending edge surfaces ( 22 . 49 . 50 )), wherein each of the edge surfaces ( 22 . 49 . 50 ) is angled, wherein for forming miter joints ( 52 ) between the walls ( 18 ) in the folded state of the blank each angled edge surface ( 22 . 49 ) of the walls ( 18 ) of the first pair ( 14 ) each having an angled edge surface ( 22 . 50 ) a wall ( 18 ) of the second pair ( 16 ) by folding the blank ( 10 ) can be brought into area contact. Blank according to claim 1, characterized in that the plate-shaped material is a sandwich panel material ( 30 ) is a first and a second cover layer ( 32 . 34 ) made of a thermoplastic material ( 33 ) and between the cover layers ( 32 . 34 ) arranged filling material ( 36 ), wherein each fold line ( 20 ) in the form of a depression ( 38 ) in the first cover layer ( 32 ) is formed, and wherein each angled edge surface ( 22 . 49 . 50 ) an edge surface of the first cover layer ( 32 ). Cut ( 10 ) according to claim 2, characterized in that during the depression ( 38 ) the indented area ( 40 ) of the first cover layer ( 32 ) make contact with the second cover layer ( 34 ) having. Cut ( 10 ) according to one of the preceding claims, characterized in that the blank ( 10 ) a lid ( 54 ), which between the walls ( 18 ) of the second pair ( 16 ) is arranged, wherein a wall ( 18 ) of the second pair ( 16 ) over a first fold line ( 56 ) with the lid ( 54 ), the other wall ( 18 ) of the second pair ( 16 ) via a second fold line ( 58 ) parallel to the first fold line ( 56 ), with the ground ( 12 ) and via a third fold line ( 60 ) parallel to the first and second fold lines ( 56 . 58 ) and between the first and second fold line ( 56 . 58 ), with the lid ( 54 ), and wherein a wall ( 18 ) of the first pair ( 14 ) over a fourth fold line ( 62 ) with the ground ( 12 ) and the other wall ( 18 ) of the first pair ( 14 ) over a fifth fold line ( 64 ) parallel to the fourth fold line ( 62 ), with the ground ( 12 ) connected is. Cut ( 10 ) according to claim 4, characterized in that at one of the second fold line ( 58 ) opposite edge region of the soil ( 12 ) a fastener ( 66 ) for fixing the soil ( 12 ) is integrally formed on a support surface. Cut ( 10 ) according to one of claims 1 to 3, characterized in that the blank ( 10 ) a lid ( 54 ) has at least one fold line with one of the walls ( 18 ) connected is. Method for producing a housing ( 24 ) from a blank ( 10 ) according to one of claims 1 to 6, wherein the method comprises the following steps: (A) transfer of the blank ( 10 ) from the unfolded state to the folded state, (B) establishing a connection between the side surfaces brought into flat contact with each other by the transfer of the blank into the folded state ( 42 ) at each indentation ( 38 ), and (C) forming miter joints ( 52 ) between the walls ( 18 ) by connecting the edge surfaces brought into contact by the transfer of the blank into the folded state ( 22 . 49 . 50 ). Method according to claim 7, characterized in that the side surfaces ( 42 ) are welded or glued together in step (B) to make the connection. Method according to claim 7 or 8, characterized in that the edge surfaces ( 22 . 49 . 50 ) are welded or glued together in step (C) for bonding. Method according to claim 7 for producing a housing ( 24 ) of a blank according to any one of claims 1 to 6, characterized in that for producing a cohesive connection of the side surfaces ( 42 ) in step (B) before step (A) at least one side surface ( 42 ) every indentation ( 38 ) for melting thermoplastic material ( 33 ) of the side surface ( 42 ) is heated at least in regions, wherein the cohesive connection ( 46 ) by contacting the side surfaces ( 42 ) is produced during folding of the blank, wherein before step (A) at least one of the collapsible contactable edge surfaces ( 22 . 49 . 50 ) for melting thermoplastic material ( 33 ) of the edge surface ( 22 . 49 . 50 ) is heated at least in regions, wherein for forming the miter joints ( 52 ) according to step (C) the edge surfaces ( 22 . 49 . 50 ) are connected by the bringing into contact of the edge surfaces during folding materially. A method according to claim 10, characterized in that for heating the thermoplastic material ( 33 ) a rod-shaped heating element ( 44 ) or a plate-shaped heating element or a high-energy radiation is used. Using a blank ( 10 ) according to one of claims 1 to 6 for producing a battery case, preferably a battery case for a traction battery of an electric vehicle.

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