DE102022104812A1 - Battery housing for an electrically powered vehicle for arranging battery cells, cross member, battery and method - Google Patents

Abstract

The invention relates to a battery housing (100, 300) for an electrically operated vehicle for arranging battery cells, comprising a battery compartment (102) for accommodating battery cells, a cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420), which extends inside the battery compartment (102) along a battery compartment floor, having a base body made of plastic, which extends in a longitudinal direction from a first end to a second end and in extending in a height direction from an underside to an upper side, and a strip-shaped reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) arranged on the upper side and/or the underside, the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) is formed with a fiber-reinforced plastic.

Description

The invention relates to a battery case for an electrically powered vehicle for arranging battery cells, a cross member for use in a battery case, a battery for providing electric power for an electrically powered vehicle, and a method for manufacturing a cross member.

Battery housings are known in principle. Battery cells, which may be combined in one or more battery modules, are arranged in battery housings. The battery cells are used to provide electrical power to drive a vehicle. Such a vehicle is in particular a motor vehicle, for example a passenger vehicle or a truck. Battery housings are mainly made of metal, especially aluminum. Metallic battery housings and metallic cover units have the advantage that they inherently offer electromagnetic shielding.

While aluminum battery cases offer various advantages, they also have disadvantages. In particular, such battery housings and cover units are expensive because the raw material aluminum is expensive and the production of components made of aluminum causes high costs, for example through a forming or die-casting process.

In addition, the high weight of battery housings made of aluminum is disadvantageous. Since electrically powered vehicles are already very heavy due to the battery cells they carry, one goal of the automotive industry is to reduce the weight of the vehicle. In addition, it is a requirement of the automotive industry that the battery housing have the smallest possible volume in order to be able to accommodate a large number of battery cells.

Another requirement for the battery housing is high rigidity. A high level of rigidity is of great importance, particularly when the battery housing is used in an underbody of a vehicle, as is customary in passenger vehicles, for example. Furthermore, the battery housing should have a high level of accident safety, so that the battery cells pose little or no danger in the event of an accident.

It is therefore an object of the invention to provide a battery case for an electrically powered vehicle for arranging battery cells, a cross member for use in a battery case, a battery for providing electric power for an electrically powered vehicle and a method for manufacturing a cross member reduce or eliminate one or more of the disadvantages mentioned. In particular, it is an object of the invention to provide a solution that enables battery cells to be arranged in a lightweight construction in an electrically operated vehicle.

This object is achieved with a battery housing, a cross member and a method according to the features of the independent patent claims. Further advantageous refinements of these aspects are specified in the respective dependent patent claims. The features listed individually in the patent claims and the description can be combined with one another in any technologically meaningful way, with further embodiment variants of the invention being shown.

According to a first aspect, the object mentioned at the outset is achieved by a battery housing for an electrically operated vehicle for arranging battery cells, comprising a battery compartment for accommodating battery cells, a cross member which extends inside the battery compartment along a battery compartment floor, having a base body made of plastic , which extends in a longitudinal direction from a first end to a second end and in a height direction from a bottom to a top, and a strip-shaped reinforcement element arranged on the top and/or the bottom, the reinforcement element being formed with a fiber-reinforced plastic.

The invention is based on the finding that the crossbeams in battery housings, which are usually made of aluminum, can be replaced by crossbeams made of plastic if a reinforcement arranged on the upper side or on the underside is used. In particular, the invention is based on the finding that the base body of the cross member can be made from a comparatively simple plastic if it has the reinforcement. Surprisingly, such a cross member offers essentially the same properties in terms of rigidity and strength as a cross member made of aluminum. Such a cross member advantageously reduces the weight of the battery housing at the same time, since the specific weight of the cross member made of plastic or fiber-reinforced plastic is lower than the weight of the cross member made of aluminum. In addition, such a cross member is cheaper. Furthermore, this cross member is more sustainable because the material extraction and production requires less energy.

The battery housing is designed for an electrically operated vehicle for arranging battery cells. The battery housing includes the battery compartment for accommodating battery cells. The battery compartment is preferably formed by means of the battery compartment floor and/or at least one housing wall. It is preferred that the cross member extends from a first housing wall to a second housing wall. In addition, it is preferred that the cross member is attached to at least one housing wall.

The cross member extends within the battery compartment and along the battery compartment floor. For example, the cross member can be arranged on the battery compartment floor and also preferably fastened. Alternatively, the cross member can be spaced apart from the battery compartment floor.

The cross member has the base body made of plastic. The base body extends in a longitudinal direction from a first end to a second end and in a height direction from a bottom to a top. The underside preferably faces the battery room floor and the top side also preferably faces away from the battery room floor. The longitudinal direction is in particular the direction in which the main body extends with a main extension direction. The vertical direction is preferably aligned orthogonally to the longitudinal direction and is also preferably aligned vertically in normal operation.

The base body can, for example, have a cross section that corresponds to or is similar to a T-shaped, a double T-shaped and/or a C-shaped cross section. In particular, it is preferred that these cross sections are formed, among other things, by flanges that are explained in more detail below.

The base body made of plastic can be made of plastic, for example. Formed with plastic can also preferably mean that the base body consists of more than 50% by volume, more than 75% by volume or more than 95% by volume of plastic. Furthermore, it is preferred that the base body comprises the plastic.

The plastic of the base body can be, for example, a fiber-reinforced plastic with short fibers and/or long fibers. A long-fiber-reinforced plastic has the advantage that it has low shrinkage, so that it has better compatibility with a continuous-fiber-reinforced plastic of the reinforcing element. In addition, lower shrinkage stresses and less distortion can be expected.

The matrix of the plastic of the base body can be a thermoplastic, for example polypropylene, polyamide or polycarbonate, or consist of a duroplastic, for example it can be or include a polyurethane, epoxy or vinyl ester resin. In particular, it is preferred that the plastic of the base body is designed to be fire-resistant or fireproof.

A strip-shaped reinforcement element is arranged on the upper side and/or on the underside of the base body. A strip-shaped reinforcement element is to be understood in particular as meaning a reinforcement element whose main extension direction is many times greater than a thickness and/or a width of the reinforcement element. In addition, it is preferred that a reinforcing element is arranged on the underside and on the upper side.

The reinforcement element is preferably arranged on the base body in such a way that a main extension direction of the reinforcement element is aligned essentially parallel to the longitudinal direction of the base body. It is also preferred that the main extension direction of the reinforcement element is oriented essentially horizontally during normal operation. The reinforcement element can also be arranged in sections on the base body.

The reinforcement element is formed with a fiber-reinforced plastic. The fiber-reinforced plastic can have glass fibers and/or carbon fibers, for example. The fibers of the fiber-reinforced plastic of the reinforcement element are preferably more than 30 mm, more than 50 mm and/or more than 200 mm long. Furthermore, it is preferred that the fibers of the fiber-reinforced plastic of the reinforcement element are in the form of endless fibers. In addition, it is preferred that the fibers are aligned in the longitudinal direction of the base body. In particular, the fibers are aligned unidirectionally. A matrix of the fiber-reinforced plastic can be a thermoplastic or a thermoset, for example.

The fact that the reinforcement element is formed with a fiber-reinforced plastic means in particular that the reinforcement element consists of more than 80% by volume, more than 90% by volume or more than 95% by volume of the fiber-reinforced plastic. It is preferred that the plastic of the base body has a lower strength and/or rigidity than the fiber-reinforced plastic of the reinforcement element.

It is preferable that a fiber content of the fiber-reinforced plastic is more than 20% by volume, more than 30% by volume, more than 40% by volume, is in particular more than 50% by volume. Furthermore, it can be preferred that the fibers are provided as a fiber fabric in the reinforcement element. It is preferred that the matrix material of the fiber-reinforced plastic corresponds to the matrix material of the plastic of the base body.

In a preferred embodiment variant of the battery housing, it is provided that the reinforcing element consists of or comprises one, two or more fiber composite tapes. It is preferred that at least two fiber composite tapes are arranged one above the other at least in sections. It is preferred that the fiber composite tapes have a thermoplastic and/or duroplastic matrix. The fibers of the fiber composite tape can be carbon fibers or glass fibers, for example.

In addition, it can be preferred that the length of the fiber composite tapes arranged one on top of the other varies along the longitudinal direction, so that the thickness of the reinforcement element varies along the longitudinal direction, in order to enable targeted reinforcement of the base body.

A preferred development of the battery housing is characterized in that the fiber-reinforced plastic is a fiber-reinforced thermoplastic. Alternatively, the fiber-reinforced plastic can be a fiber-reinforced thermoset.

Furthermore, it is preferred that the reinforcing element has a rectangular or round cross section. In addition, the cross section can be oval, trapezoidal or polygonal.

In a further preferred embodiment variant of the battery housing, it is provided that the base body has a flange adjacent to the upper side and the reinforcing element is arranged on the flange. Alternatively or additionally, it is preferred that the base body has a flange adjacent to the underside and the reinforcement element is arranged on the flange. In particular, it is preferred that a flange is arranged on the upper side and on the underside and a reinforcing element is arranged on each of the two flanges. A bearing surface of the flange for forming the upper side and/or the lower side preferably corresponds to a width of the reinforcement element.

In a further preferred development of the battery housing, it is also provided that the reinforcing element has a structured surface on a side facing the base body, in particular the flange. The structured surface is in particular configured in a predefined manner. For example, the structured surface can have a predefined structure of depressions and/or elevations. With a structured surface, the reinforcement element can advantageously be connected to the base body, so that a connection between the reinforcement element and the structured surface is improved.

A further preferred embodiment variant of the battery housing is characterized in that the flange has a recess and the reinforcement element is arranged within the recess. The indentation can be designed in the form of a groove, for example.

The depression can be formed, for example, by overmolding the reinforcement element. The advantage of the indentation is that a defined, smooth surface is formed by the plastic of the base body. This applies in particular if the dimensional tolerances of the reinforcement element are small or if it has a rough surface. The aesthetic appearance of the cross member is thereby improved. In addition, the contact surface between the base body and the reinforcement element is also increased in this way. This leads to a better connection between the base body and the reinforcement element.

In a further preferred development of the battery housing, it is provided that the flange has a hollow space aligned in the longitudinal direction, in which the reinforcing element is arranged. The hollow space preferably has a round cross-section, so that a reinforcing element with a round cross-section can advantageously be arranged in the hollow space.

The advantage of the cavity is that a relatively large connecting surface is formed between the reinforcement element and the base body. Also, due to the injection molding process, the plastic of the body shrinks after injection as the plastic cools. In this way, the base body forms a fixed connection with the reinforcement element. Furthermore, this development improves the static and dynamic strength and/or rigidity.

In addition, it is preferred that the base body has two vertically aligned ribs that are connected to a web and the reinforcement element is arranged on the web. Vertically aligned ribs are to be understood in particular as meaning ribs which are aligned in such a way that, in normal operation, they essentially are aligned vertically. Essentially vertical means in particular that there is a deviation from a vertical of less than 15°, less than 10° or less than 5°. The ribs are preferably spaced from each other.

In addition, it is preferred that at least one reinforcement rib is arranged on the base body between the first end and the second end. Such a reinforcing rib can stiffen the base body as such and advantageously interact with the reinforcing element.

It is further preferred that the reinforcement rib is arranged at an angle to a vertical, for example 45°. In addition, various rib patterns consisting of two or more reinforcing ribs can be arranged.

Another preferred embodiment variant of the battery housing is characterized in that the cross member has a first end section adjacent to the first end and a second end section adjacent to the second end, and an extension of the base body between the upper side and the underside in the height direction in the first end section in Direction of first end decreased.

In addition, it can be preferred that an extension of the base body between the upper side and the lower side in the height direction in the second end section decreases in the direction of the second end. The course in the first end section and/or in the second end section can be straight or curved.

Furthermore, it is preferred that an inclined flange extends between an upper flange on the upper side and the first end and/or the second end, which is arranged in such a way that there is a gap between the inclined flange and the lower side in the direction of the first end and/or or decreased towards the second end. Furthermore, it is preferred that a spacing in the height direction between the underside and the reinforcement element on the upper side decreases towards the first end and/or the second end.

Another preferred embodiment of the battery housing is characterized in that the reinforcement element extends from the first end to the second end. In addition, it is preferred that the reinforcing element extends along the extent of the base body between the first end and the second end with an element extent that is more than 80%, more than 90% or more than 95% of the extent of the base body.

In a further preferred embodiment variant of the battery housing, it is provided that the first end section and/or the second end section is/are formed free of the reinforcing element. In this embodiment variant, the reinforcement element extends in particular in a middle section, which extends from the first end section to the second end section.

In a further preferred embodiment variant of the battery housing, it is provided that the reinforcing element has a greater thickness in a central section of the cross member arranged between the first end section and the second end section than in the first end section and/or in the second end section. This greater thickness of the reinforcement element is realized, for example, by means of a larger number of fiber composite tapes arranged one on top of the other.

It is preferred that a lower flange of the base body has a connection cavity that is open at the bottom and the flange has an adhesive channel that is fluidically coupled to the connection cavity, so that after the cross member has been placed on a base, the adhesive can be guided through the adhesive channel into the connection cavity. Furthermore, it is preferred that the crossbeam has arrangement means which are arranged and designed to arrange the crossbeam on a housing wall of the battery housing and/or the battery compartment floor.

It is preferred that the cross member is arranged with a load transfer element on the battery compartment floor. The load transfer element can be a nipple, a clip or a bolt, for example. The load transfer element can be provided for positioning and/or fastening. It is also preferred that the cross member is welded to the battery compartment floor. For example, ultrasonic welding, resistance welding or vibration welding can be used for this. Furthermore, hot plate welding or infrared welding can be used. The welded cross member can also be provided in combination with one or more load transfer elements.

In a preferred embodiment of the battery housing, it is provided that the base body has at least one through opening, so that the cross member is lighter in weight and/or functional tion, for example for the implementation of cables, offers.

According to a further aspect, the object mentioned at the beginning is achieved by a cross member, in particular for use in a battery housing according to one of the embodiment variants described above, comprising a base body made of plastic, which extends in a longitudinal direction from a first end to a second end and in Vertical direction extends from a bottom to a top, arranged on the top and / or the bottom strip-shaped reinforcing element, wherein the reinforcing element is formed with a fiber-reinforced plastic.

The features of the cross member of the battery housing described above apply analogously to the cross member according to the further aspect.

According to a further aspect, the object mentioned at the outset is achieved by a battery for providing electrical power for an electrically operated vehicle, comprising a battery housing, in particular a battery housing according to one of the embodiment variants described above, in which battery cells are arranged and/or an inside of the battery, in particular within the battery housing, arranged cross member according to one of the previously described variants.

According to a further aspect, the object mentioned at the outset is achieved by a method for producing a cross member, in particular a cross member according to one of the embodiment variants described above, comprising the steps of: producing, in particular injection molding and/or pressing, a base body of the cross member, which is located in extending in a longitudinal direction from a first end to a second end and in the height direction from an underside to an upper side, with a plastic, in particular with a molding tool, and arranging a reinforcement element designed with a fiber-reinforced plastic, so that the upper side and/or the underside of the base body having the reinforcing element.

In a preferred embodiment variant of the method, it is provided that the reinforcement element is arranged before the base body is produced by inserting the reinforcement element into the mold.

In a further preferred embodiment variant of the method, provision is made for the reinforcement element to be arranged by a tape-laying method after the base body has been produced. In particular, fiber composite tapes, for example with a thermoplastic and/or duroplastic matrix, can be arranged one on top of the other by means of the tape laying process, so that the reinforcement element can be formed.

In a further preferred embodiment variant of the method, it is provided that the reinforcement element is arranged after the production of the base body by arranging the reinforcement element and/or by arranging reinforcement element sections. For example, continuous fiber reinforced laminates having a large width and a constant thickness can be provided and cut into strip-shaped laminates. These strip-shaped laminates can be arranged on the base body and form the reinforcement element. Furthermore, the laminates or the reinforcement element can be produced with a pultrusion process.

For further advantages, design variants and design details of the individual aspects and their possible developments, reference is also made to the description given for the further aspects, the corresponding features and developments.

• 1: eine schematische, dreidimensionale Ansicht einer beispielhaften Ausführungsform eines Batteriegehäuses;
• 2: eine schematische, zweidimensionale Ansicht einer beispielhaften Ausführungsform eines Batteriegehäuses;
• 3: schematische, zweidimensionale Querschnittsansichten von beispielhaften Ausführungsformen von Querträgern;
• 4: schematische, zweidimensionale Querschnittsansichten von beispielhaften Ausführungsformen von Querträgern;
• 5: schematische, zweidimensionale Querschnittsansichten von beispielhaften Ausführungsformen von Querträgern;
• 6: eine schematische, zweidimensionale Querschnittsansicht einer beispielhaften Ausführungsform eines Querträgers;
• 7: eine schematische, zweidimensionale Seitenansicht einer beispielhaften Ausführungsform eines Querträgers;
• 8: eine schematische, zweidimensionale Seitenansicht einer beispielhaften Ausführungsform eines Querträgers;
• 9: eine schematische, zweidimensionale Seitenansicht einer beispielhaften Ausführungsform eines Querträgers;
• 10: eine schematische, zweidimensionale Seitenansicht einer beispielhaften Ausführungsform eines Querträgers;
• 11: eine schematische, zweidimensionale Seitenansicht einer beispielhaften Ausführungsform eines Querträgers; und
• 12: eine schematische Ansicht eines beispielhaften Verfahrens.

Preferred exemplary embodiments are explained by way of example with reference to the accompanying figures. Show it:

• 1 1: a schematic, three-dimensional view of an exemplary embodiment of a battery housing;
• 2 1: a schematic, two-dimensional view of an exemplary embodiment of a battery housing;
• 3 12: schematic, two-dimensional cross-sectional views of exemplary embodiments of cross members;
• 4 12: schematic, two-dimensional cross-sectional views of exemplary embodiments of cross members;
• 5 12: schematic, two-dimensional cross-sectional views of exemplary embodiments of cross members;
• 6 1: a schematic, two-dimensional cross-sectional view of an exemplary embodiment of a cross member;
• 7 1: a schematic, two-dimensional side view of an exemplary embodiment of a cross member;
• 8th 1: a schematic, two-dimensional side view of an exemplary embodiment of a cross member;
• 9 1: a schematic, two-dimensional side view of an exemplary embodiment of a cross member;
• 10 1: a schematic, two-dimensional side view of an exemplary embodiment of a cross member;
• 11 1: a schematic, two-dimensional side view of an exemplary embodiment of a cross member; and
• 12 : a schematic view of an exemplary method.

In the figures, identical or essentially functionally identical or similar elements are denoted by the same reference symbols.

1 shows a battery housing 100 for an electrically powered vehicle for arranging battery cells. The battery housing 100 includes a battery compartment 102 for accommodating battery cells. Furthermore, the battery housing 100 includes five cross members 110 which extend along a battery compartment floor 104 within the battery compartment 102 .

The cross member 110 is arranged directly on the battery compartment floor 104 . Alternatively, the cross member 110 can also be spaced apart from the battery compartment floor 104 . The cross member 110 is described in more detail as an example for the total of five cross members. The cross member 110 has a base body 112 and a reinforcement element 122 . In a main extension direction, the cross member 110 extends in the longitudinal direction L. The cross member 110 extends orthogonally to the longitudinal direction L in the width direction B and in the height direction H.

In 2 further details of the cross member 110 are shown. The base body 112 of the cross member 110 extends in the longitudinal direction L from a first end 114 to a second end 116 and in the vertical direction H from a bottom 120 to a top 118. The base body 112 is made of plastic.

A reinforcement element 122 is arranged on the upper side 118 of the base body 112 . The base body 112 has a total of six ribs 126 along the extension between the first end 114 and the second end 116 .

In addition, the base body 112 has a peripheral flange. The peripheral flange includes, among other things, the upper flange 124 and the lower flange 125. The upper flange 124 forms the upper side 118 of the base body 112 on which the reinforcement element 122 is arranged. Furthermore, the base body 112 includes an opening 128 which, on the one hand, reduces the weight of the cross member 110 and also contributes to the functionalization, for example cables can be routed through the opening 128 . In addition, in the 2 shown that the cross member 110 is disposed within the battery case 100. The battery case 100 is also closed with a cover unit 106 .

In the 3a and b, a cross member 200, 200' is shown with a double T-shaped cross section. The base body 202, 202' has an upper flange 204 and a lower flange 206 in each case. In the 3a an upper reinforcing element 208 is arranged on the upper flange 204 and a lower reinforcing element 210 is arranged on the lower flange 206 . In the 3b only an upper reinforcement element 208 is arranged on the upper flange 204 . The lower flange 206 is free of a reinforcing element 208, 210 formed.

In 3c a C-shaped cross member 200" is shown with a C-shaped base body 202'. Distal sections of the C-shaped profile are each designed as a flange 204', 206'. A reinforcing element 208, 210 is arranged on each of these flanges.

In 4 A further training variants of the cross member 220 are shown. The main body 222 of the cross member 220 has a lower flange 224 which has a screw socket 226 in the lower distal area. With this screw receptacle 226, the cross member 220 can be arranged, for example, on a floor element. In addition or as an alternative, a writing receptacle can be provided on the upper flange, in order in particular to fasten the cover unit to the cross member 220. For example, the reinforcement element could be widened for this purpose and the write receptacle passed through the reinforcement element. Furthermore, a tie rod can be passed through the cross member from the floor element to the cover unit.

In the 4 B 1, a cross member 230 is shown having a base 232 and a lower flange 234, with the lower flange 234 forming a lower cavity 236. FIG. The cavity 236 is coupled to an adhesive channel 238 such that when the cross member 230 is placed on a floor member, an adhesive passes through the adhesive channel 238 into the cavity 236 . Thus, the cross member 230 can be fastened with an adhesive.

In the 5A,B , C further cross-sections of crossbeams 240, 240', 240'' are shown 5A a cross member 240 is shown with a base body 242 comprising a lower flange 244 and an upper flange 246, the upper flange 246 having a recess in which the reinforcement element 248 is arranged.

In the 5 B the cross member 240' has a base body 242' of analog design in the lower area. In the upper area, the upper flange 246' is designed differently, namely with a circular ring-shaped cross-section, in which a circular reinforcing element 248' is arranged.

In 5c a crossbeam 240" is shown, the base body 242" of which has two vertically aligned ribs 250, 252 which are connected to a web 254. The reinforcement element 248" is arranged on the web 254. The spacing between the web 254 and the reinforcement element 248" is only shown for better visualization, since these are connected to one another.

In 6 a cross member 260 with a base body 262 and an upper flange 266 is shown, the upper flange 266 having a structured surface on the side facing the reinforcement element 268 .

In the 7 until 9 a battery housing 300 with a cross member 310 is shown. In 7 Cross member 310 is shown having a base 312 extending from first end 314 . In the vertical direction H, the base body 312 extends from the top 318 to the bottom 320. The reinforcement element 322 is arranged on the top 318. Adjacent to the top 318 the base 312 is formed by the top flange 324 . The base body 312 is formed by the lower flange 326 on the underside 320 .

Adjacent the first end 314 , the cross member 310 has a first end portion 330 . Provision is made for an extension in the height direction H between the underside 320 and the upper flange 324 to be reduced in the direction of the first end 314 . This is formed, among other things, by the inclined flange 332 . Provision is made in the first end section 330 for this to be free of reinforcement elements 322 . Adjacent to the first end portion 330 is a middle portion 328 having the reinforcement member 322 .

the inside 8th The cross member 310' shown has another variant of a base body 312'. It is provided that the extent of the base body 312 ′ between the upper side 318 and the lower side 320 in the height direction H in the first end section 330 decreases in the direction of the first end 314 analogously to the inclined flange 332 . It is provided in the first end section 330 that it is formed without a reinforcement element 322 .

In 9 is essentially the same cross member as in 8th shown, wherein the reinforcement element 322 is arranged in the first end section 330 .

In 10 a cross member 400 with a base body 401 is shown. A reinforcement element 404 is arranged on the upper side 402 . It is shown schematically that the reinforcement element 404 has a first fiber composite tape 406 , a second fiber composite tape 408 and a third fiber composite tape 410 . The fiber composite tapes 406, 408, 410 extend in the longitudinal direction L with a different length. Thus, in the present case, the center of the base body 401 is stiffened more than the side sections.

In 11 a further variant embodiment of a cross member 420 is shown, with the base body 422 extending from the first end 424 to the second end 426 . It is shown that the upper side 430 of the base body 422 is convex and thus the reinforcement element 428 also assumes a curved shape.

The features and embodiments of the different cross members 110, 200, 200′, 200″, 220, 230, 240, 240′, 240″, 260, 310, 400, 420 described above can be used in any way and independently of other features shown in each case be combined with each other.

In 12 a method for manufacturing a cross member 110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420 is shown. The method includes step 500: producing a base body 112, 202, 202', 222, 232, 242, 242', 242", 262, 312, 312', 401, 422 with a plastic, of the cross member 110, 200, 200 ', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420, which extends in a longitudinal direction L from a first end to a second end and in a height direction H from a bottom to a top .

The method also includes step 502: arranging a reinforcement element 122, 208, 210, 248, 248', 268, 322, 404, 428 so that the top and/or bottom of the base body 112, 202, 202', 222, 232 , 242, 242', 242", 262, 312, 312', 401, 422 the reinforcing element comprises 122, 208, 210, 248, 248', 268, 322, 404, 428.

The battery housing 100, 300 described above and the corresponding cross member 110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420 have the advantage that the battery housing 100 , 300 and/or the cross member 110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420 has a lower weight. Furthermore, the battery case 100, 300 can be manufactured at a lower cost.

REFERENCE MARKS

100

battery case

102

battery room

104

battery room floor

106

cover unit

110

cross member

112

body

114

first end

116

second end

118

top

120

bottom

122

reinforcement element

124

top flange

125

lower flange

126

rib

128

opening

200, 200', 200"

cross member

202, 202'

body

204, 204'

Top Flange

206, 206'

Lower Flange

208

upper reinforcement element

210

lower reinforcement element

220

cross member

222

body

224

lower flange

226

screw mount

230

cross member

232

body

234

lower flange

236

cavity

238

glue channel

240, 240', 240"

cross member

242, 242', 242"

body

244

lower flange

246, 246'

top flange

248, 248'

reinforcement element

250

rib

252

rib

254

web

260

cross member

262

body

266

top flange

268

reinforcement element

300

battery case

310

cross member

312, 312'

body

314

first end

318

top

320

bottom

322

reinforcement element

324

top flange

326

lower flange

328

middle section

330

first end section

332

inclined flange

400

cross member

401

body

402

top

404

reinforcement element

406

first fiber composite tape

408

second fiber composite tape

410

third fiber composite tape

420

cross member

422

body

424

first end

426

second end

428

reinforcement element

430

top

Claims (18)

Battery housing (100, 300) for an electrically powered vehicle for arranging battery cells, comprising - a battery room (102) for accommodating battery cells, - a cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420) which extends within the battery compartment (102) along a battery compartment floor (104). , having o a base body (112, 202, 202`, 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) made of plastic, which extends in a longitudinal direction (L) from a first end extending to a second end and in a height direction (H) from a bottom to a top, and o a strip-shaped reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) arranged on the upper side and/or the lower side, - wherein the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) is formed with a fiber-reinforced plastic. Battery case (100, 300) according to claim 1 , wherein - the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) consists of or comprises one, two or more fiber composite tapes. Battery housing (100, 300) according to any one of the preceding claims, wherein - the fiber-reinforced plastic is a fiber-reinforced thermoplastic. Battery housing (100, 300) according to any one of the preceding claims, wherein - the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) has a rectangular or round cross-section. Battery housing (100, 300) according to any one of the preceding claims, wherein - the base body (112, 202, 202`, 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) has a flange adjacent to the top and the reinforcing element (122, 208, 210 , 248, 248', 268, 322, 404, 428) on the flange. Battery housing (100, 300) according to any one of the preceding claims, wherein - The reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) has a structured surface on a side facing the base body. Battery housing (100, 300) according to any one of the preceding claims, wherein - the flange has a recess and the reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) is arranged within the recess. Battery housing (100, 300) according to any one of the preceding claims, wherein - the flange has a longitudinally oriented cavity in which the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) is arranged. Battery housing (100, 300) according to any one of the preceding claims, wherein - the base body (112, 202, 202`, 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) has two vertically aligned ribs which are connected by a web, and - the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) is arranged on the web. Battery housing (100, 300) according to any one of the preceding claims, wherein - the cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420) has a first end portion adjacent to the first end and a second end portion adjacent to the second end has end portion, and - An extension of the base body (112, 202, 202', 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) between the top and the bottom in the height direction in the first end section in direction of the first end decreased. Battery housing (100, 300) according to any one of the preceding claims, wherein - the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) extends from the first end to the second end. Battery housing (100, 300) according to any one of the preceding claims, wherein - the first end section and/or the second end section is formed free of the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428). Battery housing (100, 300) according to any one of the preceding claims, wherein - in a central section of the cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420) arranged between the first end section and the second end section, the reinforcing element (122 , 208, 210, 248, 248', 268, 322, 404, 428) has a greater thickness than in the first end portion and/or the second end portion. Cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420), in particular for use in a battery housing (100, 300) according to one of the preceding claims, comprising - a base body (112, 202, 202', 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) made of plastic and located in extends in a longitudinal direction from a first end to a second end and in the height direction from an underside to an upper side, - a strip-shaped reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428), - wherein the reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) is formed with a fiber-reinforced plastic. Battery for providing electrical power for an electrically operated vehicle, comprising - a battery housing (100, 300), in particular a battery housing (100, 300) according to any one of the preceding claims, in which battery cells are arranged, and/or - one inside the battery , in particular inside the battery housing, arranged cross members (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420) according to the previous one Claim 14 . Method for producing a cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420), in particular a cross member (110, 200, 200', 200" , 220, 230, 240, 240', 240", 260, 310, 400, 420) after the previous one Claim 14 , comprising the steps of: - producing, in particular injection molding and/or pressing, a base body (112, 202, 202', 222, 232, 242, 242', 242", 262, 312, 312', 401, 422) of the cross member (110, 200, 200', 200", 220, 230, 240, 240', 240", 260, 310, 400, 420) extending in a longitudinal direction from a first end to a second end and in a height direction from a bottom side to a top side, with a plastic, in particular with a mold; and - arranging a reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) made of a fiber-reinforced plastic, so that the top and / or the underside of the base body has the reinforcing element. procedure after the previous one Claim 16 , wherein the arranging of the reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) prior to the creation of the base body (112, 202, 202`, 222, 232, 242, 242', 242" , 262, 312, 312', 401, 422) by inserting the reinforcing element (122, 208, 210, 248, 248', 268, 322, 404, 428) into the mold. procedure after the previous one Claim 16 , wherein the arranging of the reinforcement element (122, 208, 210, 248, 248', 268, 322, 404, 428) after the creation of the base body (112, 202, 202`, 222, 232, 242, 242', 242" , 262, 312, 312', 401, 422) by a tape laying process.

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