WO2020038972A1 - Battery housing for a vehicle driven by an electric motor - Google Patents

Battery housing for a vehicle driven by an electric motor Download PDF

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Publication number
WO2020038972A1
WO2020038972A1 PCT/EP2019/072320 EP2019072320W WO2020038972A1 WO 2020038972 A1 WO2020038972 A1 WO 2020038972A1 EP 2019072320 W EP2019072320 W EP 2019072320W WO 2020038972 A1 WO2020038972 A1 WO 2020038972A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing
tub
battery housing
trough
walls
Prior art date
Application number
PCT/EP2019/072320
Other languages
German (de)
French (fr)
Inventor
Alexander GÜNTHER
Original Assignee
Kirchhoff Automotive Deutschland Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102018120371.3 priority Critical
Priority to DE102018120371.3A priority patent/DE102018120371A1/en
Application filed by Kirchhoff Automotive Deutschland Gmbh filed Critical Kirchhoff Automotive Deutschland Gmbh
Publication of WO2020038972A1 publication Critical patent/WO2020038972A1/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • H01M2/1077Racks, groups of several batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention relates to a battery housing for a vehicle driven by an electric motor, which battery housing comprises: a trough (4), having a bottom (2) and side walls (3, 3.3) formed integrally on the bottom, the edge regions (6.1) of the trough (4) which are formed by adjacent side walls (3, 3.3) being rounded; and a frame structure (5) surrounding the trough on the outside. On the inside of at least one side wall (3), a reinforcing element (7) is arranged, which forms or is formed as a hollow-chamber profiled element, extends between the rounded edge regions (6) delimiting the side wall (3) with respect to the adjacent side walls (3.3) and follows the longitudinal extent of the side wall (3), and said reinforcing element is connected to the side wall (3), the bottom (2) and, in the region of the end portions of said reinforcing element, to the trough (4) such that, with respect to said side wall (3), the stiffening frame structure is formed by the outer frame profile part (5.2), the side wall (3), the bottom portion of the trough (4) that adjoins the side wall (3), and the reinforcing element (7), which is connected to the trough (4) and inserted into the trough.

Description

 Battery housing for an electromotive vehicle

The invention relates to a battery housing for an electric motor-driven vehicle, the battery housing having a bottom and there molded side walls with tub, the edge regions formed by adjacent side walls of the tub being rounded and having a frame structure surrounding the tub on the outside.

In the case of vehicles driven by an electric motor, such as, for example, passenger cars, industrial trucks or the like, battery modules are used as a power store. Such battery modules are typically composed of a large number of individual battery cells. These batteries are so-called flochvolt batteries. Certain requirements are placed on the accommodation of such battery modules necessary for the operation of such a vehicle. It is essential that the battery module or batteries are protected in their battery housing from external influences. In particular, these have to meet the required safety requirements in the case of force-related force inputs.

In order to provide mechanical protection for the battery housing, in particular for the battery module or batteries accommodated therein, the tub is surrounded by a frame structure which is arranged on the outside with respect to the side walls. Such a frame structure is formed from individual profile sections assembled to form a frame profile. A battery housing with such a trough is known from US 2011/0143179 A1. Extruded light-alloy hollow chamber profiles, typically aluminum extruded profiles, are used as profile sections to save weight.

The frame structure serves to absorb shocks, such as can occur in the event of an impact. At least to a certain extent, the battery volume contained in the tub is to be protected from damage by this. For bracing the wall NEN VOLUME longitudinal and transverse struts are arranged therein, which are supported with their end faces on the surfaces of the mutually facing side walls. These struts serve the purpose of stiffening the tub. The impact energy, which in the event of an impact acts laterally on a profile section of such a frame profile, is to be passed on via the struts or those extending in the direction of the impact to the side facing away from the impact. This typically acts against an abutment.

DE 10 2016 120 828 A1 discloses a further battery housing for an electromotive vehicle, in which a trough is enclosed by a frame structure in order to provide mechanical protection for the battery modules accommodated in the battery housing. This frame structure is arranged on the outside with respect to the side walls, the frame structure being composed of individual hollow-chamber profile parts which are connected to one another. The Hohlkam merprofilteile are extruded light metal hollow chamber profiles, typically aluminum extrusions. Built or deep-drawn tubs are used in such battery housings. A built-in tub is characterized by the fact that the profile frame is tightly welded to the floor panel, which has the advantage of ideal corner formation and thus an optimized use of space. The disadvantage of a built tub is that reliable process welding is required, which is typically associated with considerable costs. In contrast to this, there are no such sealing problems with a deep-drawn tub. However, compliance with certain deep-drawing radii must be taken into account, especially when side walls adjoining one another. As a result, the tub volume cannot be optimally used in such a configuration when occupying battery modules.

DE 10 2016 1 16 729 A1 discloses a battery housing with which the tub volume provided by the tub can be better utilized in a deep-drawn tub. This is achieved in that for each rounded edge region of the trough by which two side walls are connected, an edge section rounded in opposite directions as a connection in the transition to at least one side wall tion wall section is provided. By this measure, the ge rounded edge area is offset to the outside with respect to the tub volume. Such a trough therefore provides a larger battery volume. Due to the design of these edge areas, which are also rounded outwards, the side walls of the tub do not lie against a frame structure made of straight frame profile parts on the outside.

Sometimes the battery modules arranged in such a trough are fastened to the hollow-chamber profile parts of the frame structure via connecting flanges, specifically by means of screws inserted into the hollow-chamber profile parts. In this way, although the battery modules are fastened in the battery housing by means of screws, the battery volume available through the battery housing can be used completely by battery volume. However, such an attachment requires that it be made sealed. In many cases, this includes the additional measure of providing a seal for the screw connection made. This must be done at every screw connection position. A battery housing is known from DE 10 2017 102 685 A1, which is optimized with regard to the manufacturing tolerances, the costs in the forming process and the usable interior space. This battery case located on the bottom of the battery housing has longitudinal struts ben on which battery modules can be placed in order to ensure sufficient rear ventilation of the battery modules required for thermal reasons. A frame structure enclosing the battery housing is connected to the bottom of the tub of the battery housing to form an underrun protection. Furthermore, a battery housing is known from DE 10 2016 1 15 037 A1, which is aimed in particular at improved crash performance in a small installation space. The adjoining Seitenflä surfaces are either abutting or mitered, so that a good crash performance, but not sufficient tightness of the battery housing can be ensured. A battery housing is known from US 2017/01 17514 A1, in which a deep-drawn trough is provided with reinforcing elements on an inside of the battery trough, the battery module being fixed to the reinforcing elements via flanges in order to prevent the battery modules from slipping. However, the use of the reinforcement elements means that a considerable proportion of the volume that is optimally available for the battery volume is lost.

Starting from the discussed prior art, the invention is therefore based on the object of developing a battery housing of the type mentioned in such a way that not only the available space available for providing battery volume can be better used, but in that, without additional sealing measures before, a battery module attachment is possible via connecting flanges protruding from such a battery module.

This object is achieved according to the invention by a generic battery housing at the outset, in which on at least one side wall inside a hollow chamber forming or formed as a hollow chamber profile, extending between the side wall areas against the adjacent side walls and rounded edges extending, the longitudinal extent the following reinforcement element is arranged and connected to the side wall, the floor and in the region of its end sections with the tub, so that with respect to this side wall the stiffening frame structure by the outer frame profile part, the side wall, the bottom section of the tub bordering the side wall and by the with the tub connected, inserted into the tub reinforcing element is formed.

This battery housing includes both a trough for receiving battery modules and a frame structure surrounding the trough on the outside. Along at least one side wall in this battery housing, a reinforcing element is inserted into the tub. The reinforcing element extends along the longitudinal extent of the side wall between the two other two bordering this side wall Sidewalls. The useful volume of the tub is limited by the reinforcing element parallel to the floor in the direction of the tub interior. This reinforcing element is either a hollow chamber profile or a reinforcing element forming a hollow chamber profile. In the latter case, the hollow chamber profile is formed by the reinforcing element, part of the bottom and at least a portion of the adjacent side wall of the tub. By providing egg nes such a reinforcement element located within the tub, an inner support structure is created so that the frame profile part can be provided with a smaller width on the outside of this side wall connected to the reinforcing element inside. In this respect, with respect to this side wall, the stiffening frame structure is formed by the outer frame profile part, the side wall, the bottom portion of the tub adjoining the side wall and by the reinforcing element inserted into the tub and connected to the tub. Since the reinforcing element is located inside the trough, a battery module can be connected to it, for example using connecting flanges, without special sealing measures being necessary for this purpose, even if the wall of a frame profile part, for example a hollow profile part, is penetrated by fasteners be used. The penetration of the reinforcing element with a screw leads in the difference to previously known fastenings not to a leak, since the end faces of the reinforcing element are arranged inside the tub. Preferably, the connecting flanges projecting from the opposite side faces on a battery module are arranged offset to one another. This simplifies assembly and disassembly of the typically several battery modules, since then the connecting flanges cannot be arranged one above the other but next to one another. In such a configuration, fastening openings or a perforation can be provided in the reinforcing element at corresponding positions. Since the reinforcing element is located inside the tub, fastening openings can be provided for all possible battery module connections, without this resulting in leakage problems, even if not used. This was the case with battery housings State of the art not possible. The advantages described above arise regardless of whether the tub is a deep-drawn component or a built component. According to a possible embodiment, the tub is a deep-drawn component and the edge regions formed by adjacent side walls are rounded accordingly. In such a case, the reinforcing element is located within the opposite rounded edge regions, through which the side wall to which the reinforcing element is connected is connected to the two adjacent side walls. With this concept, the tub volume between the opposing rounded edge areas, which is not or only insufficiently usable for occupying battery volume due to the rounded edge formation, is skillfully used for the formation of the structure described above.

The installation of such a reinforcing element within the trough, following the longitudinal extent of a side wall, enables a design of the outside frame profile part with a smaller width. Therefore, the tub can have a larger length in this regard with the same external dimensions. This is the reason for the improved utilization of the available installation volume as battery volume with the advantages of a deep-drawn tub in this battery housing. In such a battery housing, the frame structure is preferably carried out on the two opposite side walls as described above. A reinforcing element is thus arranged as an internal structural part on the inside of the side wall.

The reduction in the width of the frame structure profile parts on the outside of a side wall, on the inside of which a reinforcing element is arranged, depends on the design of the reinforcing element, in particular its width extending into the tub volume. The width of these frame structure profile parts can for example be reduced by 50% compared to the other profile parts. It is understood that the Possibility of reducing the width of these frame structure profile parts is also dependent on the radius of the rounded edge areas if they are rounded. In this respect, it is also advantageous with this concept that the rounded edge areas do not have to have very tight radii in order to make optimum use of the installation space. Rather, it is preferred if these do not have too small radii. The manufacture of such a tub is correspondingly simpler.

The reinforcing element can be a hollow chamber profile. Typically, however, a reinforcing element will be used, which is not in itself a hollow chamber profile, but together with the adjacent side wall or part of it with respect to its vertical extension and a portion of the bottom forms a hollow chamber profile when connected to the wall , which is typically done by joining. Such a reinforcement element typically has two legs arranged at an angle to one another. To connect this reinforcing element to the side wall and the bottom of the trough, the legs can each carry at their free ends a joining flange following the longitudinal extension of the reinforcing element, which are each folded over with respect to the plane of the leg. The joining flanges are designed so that they extend parallel to the adjacent side wall or the bottom of the tub with respect to their plane. The reinforcement element is connected to the side wall, the floor and with its longitudinal ends to the tub. To connect the longitudinal ends of the reinforcing element (its end faces) to the opposite side walls, it is provided in one exemplary embodiment that the leg extending in the direction of the height of the tub has a bent extension on the long side as a joining extension with which the reinforcing element adjoins the adjacent side wall connected.

For optimal use of space in the battery housing, in the case of a deep-drawn trough with rounded edge areas, the leg of the reinforcing elements spaced from the side wall is preferably located in the outlet area of the rounded edge area in the transition to the respectively adjacent side wall. An extension of the Reinforcing element beyond the rounded edge area is considered to be unnecessary and would reduce the usable volume of the tub for battery modules.

It goes without saying that two side surfaces that lie opposite one another with respect to the tub interior can be connected to one another by struts resting on the bottom of the tub in order to enable further stiffening of the battery housing and a spacing of the battery modules to be accommodated

For reasons of weight optimization, it is expedient to assemble the frame structure that surrounds the outside from light-metal hollow-chamber profile parts. At the same time, this ensures that the frame structure is particularly stable. Alternatively, the frame structure surrounding the outside can be formed from a sheet metal.

The invention is described below using an exemplary embodiment with reference to the accompanying figures. 1 shows a perspective view of a first invention

 Battery case

2: the battery housing of Figure 1 in a plan view, Fig. 3: a partial sectional view of the battery housing of Figure 2 along the line A - B,

Fig. 4: an enlarged section of the battery housing of the figure

 2 in the lower left corner area shown in FIG. 2,

5: a top view of a further battery housing according to the invention with battery modules and inserted therein

6 shows a partial sectional view of the battery housing of FIG. 5. A battery case 1 comprises a base 2 and side walls 3, 3.1, 3.2, 3.3 formed thereon. The side walls 3, 3.1, 3.2, 3.3 go over the top into an outwardly bent flange. These elements form the tub 4. The tub 4 has been brought into the shape shown in the figures by a deep-drawing process. The tub 4 of the exemplary embodiment shown is a tub made from a sheet steel plate. On the outside, the tub 4 is surrounded by a frame structure 5. The outside frame structure 5 is composed of individual hollow section parts 5.1, 5.2. The hollow chamber profile parts 5.1, 5.2 are connected to one another in the region of their ends. This connection is a welded connection in the illustrated embodiment. The longitudinal hollow section parts 5.1 have a larger width than the transverse hollow section parts 5.2. In the illustrated embodiment, the width of the longitudinal hollow section 5.1 corresponds approximately to twice the width of the transverse hollow section 5.2.

In this embodiment, there is a rounded edge region between two adjacent side walls of the tub 4. This is made with reference to the side wall 3 in the transition to the side wall 3.1 with the reference symbol 6 and in the transition from the side wall 3 to the side wall 3.3 with the reference symbol 6.1. On the outside with respect to the side wall 3 of the tub 4 there is one of the two transverse hollow section parts 5.2 with a smaller width. Following this side wall 3, a reinforcing element 7 is arranged on the inside. This extends, as can be seen from the top view of the battery housing 1 in FIG. 2, between the two opposing rounded edge regions 6, 6.1. The end sections 8, 8.1 of the reinforcing element 7 extend into the rounded edge areas 6, 6.1. Such a reinforcing element 7.1 is likewise inserted on the inside on the opposite side wall 3.2. The reinforcing element 7 and the resulting structure of the structure associated with the side wall 3 are explained below. These explanations apply equally to the structure of the side wall 3.2, the reinforcing element 7.1 and the other cross-sectional hollow section structure. The structure of the reinforcing element 7 and thus the structure enclosing the side wall 3 of the tub 4 is clear from FIG. 3. It can be seen first of all that the transverse hollow-chamber profile part 5.2 has a lower flange F projecting below the bottom 2 of the trough 4. The same applies to the longitudinal hollow section 5.1. Thus, the bottom 2 of the tub 4 stands on the edges of these flanges F. In the reinforcing element 7 of the illustrated embodiment, it is a formed sheet steel component. This has two legs 9, 9.1 arranged at an angle to one another. The free end of each leg 9, 9.1 is bent to form a joining flange 10 or 10.1 from the plane of the respective leg 9, 9.1. In the illustrated embodiment, the legs 9, 9.1 enclose an angle of 90 degrees. The joining flanges 10, 10.1 run parallel to the sides of the base 2 or the side wall 3 facing the inside of the tub. The reinforcing element 7 is connected to the bottom 2 or the side wall 3 by spot welding with the joining flanges 10, 10.1. This non-positive connection of the reinforcing element 7 to the side wall 3 or the adjacent bottom 2 of the trough 4, together with the lower section of the side wall 3 and the adjoining section of the bottom 2, forms a hollow chamber profile which, following the side wall 3, extends between the mutually facing ge rounded edge regions 6, 6.1 (see FIG. 2). On the front side, a bent extension 1 1 is connected to the vertically extending leg 9 of the reinforcing element 7. This serves to connect the reinforcing element 7 to the side wall 3.1 or 3.3. This can also be done by spot welding.

The frame structure 5 serving to protect the battery volume inside the tub is thus in the area of the narrower transverse hollow-chamber profile parts 5.2 due to the implementation of the reinforcing element 7 into the tub interior compared to a configuration in which this structure is located only outside the tub 4 , not structurally weakened. In this battery housing 1, part of the outside frame structure has therefore been moved into the interior of the tub 4. The reinforcing element 7 is located within half of the rounded edge regions 6, 6.1, for a battery volume anyway can not be used or not to any significant extent. The sectional view of Figure 3 shows that the transverse Hohlkam merprofilteil 5.2 has a width that hardly protrudes from the outer end of the circumferential mounting flange of the tub 4. Without increasing the overall length of the battery housing 1, the trough 4 can therefore have a greater length, as a result of which an optimized utilization of the available installation volume is possible with a larger trough volume that can be used by battery modules. The rounded edge regions 6, 6.1, which cannot be used for introducing battery volume, are used in this battery housing 1 to implement a structural element - here the reinforcing element 7.

In FIG. 3, the boundary between the rounded edge area 6.1 and the side wall 3 adjoining it is identified with the reference number 12. This makes it clear that the reinforcing element 7 extends with its legs 9, 9.1 only within the rounded edge region 6, 6.1. The fact that the joining flange 10 and the extension 11 also extend in the direction of the side wall 3.3 does not affect the battery volume to be accommodated.

The installation of the reinforcing element 7 in the opposite rounded edge areas 6, 6.1 is also clear from the enlarged enlarged representation of the top view of FIG. 2 in FIG. 4. The width of the rounded edge areas 6, 6.1 that cannot be used from the inside of the tub is viewed in FIG marked this figure with A 2 . This distance A 2 represents the distance between the inside of the wall 3 and the dividing line 12. The extension of the leg 9 projecting from the side wall 3 into the tub interior is identified therein by Ai. The relevant depth, occupied by the reinforcing element 7, is clearly recognizable as less than the depth of the rounded edge regions, expressed by A 2 . These distances A 1; A 2 are also shown in Figure 3.

As also shown in FIGS. 1 and 2, it goes without saying that a further stiffening of the battery housing 1 is brought about if two side surfaces 3.1, 3.3 lying opposite one another with respect to the interior of the tub are connected to one another by struts 13, preferably lying on the bottom 2 of the tub 4 and connected to it. Individual battery module receptacles are also provided here. Figures 5, 6 show a further embodiment of the bat terie housing 1.1. The battery housing 1.1 is basically constructed in the same way as the battery housing 1 of the preceding figures, but differs from this in that adjacent side walls of this tub 4.1 do not have a rounded edge region 6.2, 6.3. Unless stated otherwise below, the statements regarding the battery housing 1 of the above exemplary embodiment apply equally to the battery housing 1.1. The trough 4.1 is a so-called built trough, in which the side walls are folded towards the floor and welded together for edge formation along the then adjoining side surface ends. In the tub 4.1 on the two narrow sides of the tub inside a reinforcing element 7.2, 7.3 is inserted and, as described for the tub 4 of the battery housing 1 ben, connected to the adjacent side walls and the bottom (see also Figure 6).

FIG. 5 shows the battery housing 1.1 with the cover removed and the battery modules 14 inserted therein. The battery modules 14 each have two connecting flanges 15 located in the respective end region on their longitudinal sides. These are protruding with respect to the respective battery module 14 in the plane of the bottom of the tub 4.1 and serve as connecting means for fastening the battery modules 14 to the tub 4.1. To differentiate them, struts 13.1 are used in the trough, just as in the exemplary embodiment in FIGS. The height of the reinforcing elements 7.2, 7.3 and the height of the struts 13.1 are the same. The height of these components is less than the height of the side walls of the tub 4.1, so that, as can be seen from FIG. 6, the connecting flanges 15 rest on the leg 9.2 of the reinforcing elements 7.2 or 7.3. The reinforcing elements 7.2, 7.3 have a perforation 16 which is used for receiving fastening screws as exemplary fasteners for fixing the battery modules 14 by means of their connecting flanges 15 on the reinforcing elements 7.2, 7.3 and serve the struts 13.1. Instead of screws, rivets can of course also be used.

The edge battery modules 14 are fastened in the same way with their reinforcing elements 7.2, 7.3 to the opposite connecting flanges 15 on a strut 13.1 each.

As can be seen from the figures, the reinforcing elements 7.2, 7.3 are located within the trough 4.1, so that it is completely irrelevant for the tightness of the trough 4.1 whether unused perforations 16 are present in such a reinforcing element 7.2, 7.3. Likewise, a screw fastening need not be made sealed.

The connecting flanges 15 of the battery modules 14 are arranged offset with respect to one another with respect to the longitudinal sides lying opposite one another. This enables assembly and disassembly of the individual battery modules 14 within the trough 4.1 of the battery housing 1.1 independently of one another. Also in this configuration of the battery housing 1.1, the quersei term hollow chamber parts 5.3 are made smaller in terms of their width than the longitudinal hollow chamber parts 5.4.

The invention has been described in the context of these statements with reference to exemplary embodiments. Without leaving the scope of the applicable claims, there are numerous further configurations for a person skilled in the art to be able to implement the invention in detail without it having to be explained in more detail in the context of these statements. LIST OF REFERENCE NUMBERS

1, 1 .1 battery case

 2 floor

, 3.1, 3.2, 3.3 side wall

 4.1 tub

 5 frame structure

, 5.2, 5.3, 5.4 hollow section part

, 6.1, 6.2, 6.3 edge area

, 7.1, 7.2, 7.3 reinforcing element

 8, 8.1 end section

 9, 9.1, 9.2 legs

 10, 10.1 joining flange

 1 1 extension

 12 dividing line

 13, 13.1 strut

 14 battery module

 15 connecting flange

1 6 holes

Ai depth of reinforcement element A 2 depth of rounded edge area F flange

Claims

claims
1. battery housing for an electromotive vehicle, the battery housing having a bottom (2) and molded on te side walls (3, 3.1, 3.2, 3.3) having trough (4; 4.1), the adjacent side walls (3, 3.1; 3 , 3.3) formed edge areas (6, 6.1) of the tub (4) are rounded, and a frame structure (5) surrounding the tub ne on the outside, characterized in that on at least one side wall (3) on the inside a hollow chamber profile or formed as a hollow chamber profile, between the side wall (3) against the adjacent side walls (3.1, 3.3) bounding ge rounded edge regions (6, 6.1; 6.2, 6.3) extending, the longitudinal extension of the side wall (3) following reinforcing element (7 , 7.1; 7.2, 7.3) and is connected to the side wall (3), the floor (2) and in the region of its end sections (8, 8.1) to the trough (4; 4.1), so that with respect to this side wall (3) the stiffening frame structure due to the external frame profile part (5th
2, 5.3), the side wall (3), to the side wall
(3) bordering bottom portion of the tub (4, 4.1) and by the tub (4, 4.1) connected, inserted into the tub Ver reinforcing element (7, 7.1) is formed. 2. Battery housing according to claim 1, characterized in that the reinforcing element (7, 7.1; 7.2, 7.3) is connected with its end portions (8, 8.1) to the adjacent side walls (3.1, 3.3). 3. Battery housing according to one of claims 1 or 2, characterized in that the reinforcing element (7, 7.1; 7.2, 7.3) forming a hollow chamber profile has two legs (9, 9.1; 9.2) arranged at an angle to one another, both legs (9, 9.1; 9.2) at their ends following the longitudinal extension of the reinforcing element (7, 7.1; 7.2, 7.3) opposite the plane of the respective one
Legs (9, 9.1) have a bevelled joint flange (10, 10.1), wherein the first leg (9) with its joining flange (10) is connected to the floor (2) and the second leg (9.1) with its joining flange (10.1) is connected to the at least one side wall (3) of the trough (4; 4.1).
4. Battery housing according to claim 3, characterized in that the first leg (9) of the reinforcing element (7, 7.1) parallel to the at least one side wall (3) and the second leg (9.1; 9.2) parallel to the bottom (2) of the Trough (4; 4.1) are arranged running.
5. Battery housing according to one of claims 1 to 4, characterized in that the reinforcing element (7, 7.1; 7.2, 7.3) has at its longitudinal ends formed on its wall delimiting the inside of the tub, bent extensions (1 1) to the each adjacent side wall (3.1, 3.3) is connected.
6. Battery housing according to one of claims 1 to 5, characterized in that the frame structure (5) is composed of a plurality of profile parts connected to one another in the region of their ends, in particular hollow-chamber profile parts (5.1, 5.2; 5.3, 5.4) and that Width of the profile parts (5.2; 5.3), which are arranged on the outside on those side walls (3, 3.2), on the inside of which a reinforcing element (7, 7.1; 7.2, 7.3) is located, is smaller than the width of the other profile parts (5.1 ; 5.4).
7. Battery housing according to claim 6, characterized in that the width of the profile parts (5.2; 5.3) on those side walls (3, 3.2) on which on the inside a reinforcing element (7, 7.1; 7.2, 7.3) is arranged, about 50% the width of the other profile parts
(5.1; 5.4) corresponds.
8. Battery housing according to one of claims 1 to 7, characterized in that a reinforcing element (7, 7.1; 7.2, 7.3) is arranged on two opposite side walls (3, 3.2) of the trough (4).
9. Battery housing according to one of claims 1 to 8, characterized in that two with respect to the interior of the tub against opposite side surfaces (3.1, 3.3) by lying on the bottom (2) of the tub (4; 4.1), the tub interior in individual battery modules dividing struts (13; 13.1) are interconnected.
10. Battery housing according to one of claims 1 to 9, characterized in that the trough (4) is deep-drawn.
11. Battery housing according to claim 10, characterized in that the end of the reinforcing element (7, 7.1) pointing into the interior of the trough (4) in the region of the outlet of the opposing rounded edge regions in the transition to the adjacent side walls (3.1, 3.3) ends.
12. Battery housing according to one of claims 1 to 9, characterized in that at least one battery module (14) is connected via connecting flanges (15) to a reinforcing element (7.2, 7.3).
PCT/EP2019/072320 2018-08-21 2019-08-21 Battery housing for a vehicle driven by an electric motor WO2020038972A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102018120371.3 2018-08-21
DE102018120371.3A DE102018120371A1 (en) 2018-08-21 2018-08-21 Battery housing for an electromotive vehicle

Publications (1)

Publication Number Publication Date
WO2020038972A1 true WO2020038972A1 (en) 2020-02-27

Family

ID=67777289

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Application Number Title Priority Date Filing Date
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Country Link
DE (1) DE102018120371A1 (en)
WO (1) WO2020038972A1 (en)

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