WO2020038967A1 - Boîtier de batterie - Google Patents

Boîtier de batterie Download PDF

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Publication number
WO2020038967A1
WO2020038967A1 PCT/EP2019/072311 EP2019072311W WO2020038967A1 WO 2020038967 A1 WO2020038967 A1 WO 2020038967A1 EP 2019072311 W EP2019072311 W EP 2019072311W WO 2020038967 A1 WO2020038967 A1 WO 2020038967A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery housing
cross
cross strut
battery module
Prior art date
Application number
PCT/EP2019/072311
Other languages
German (de)
English (en)
Inventor
Alexander GÜNTHER
Marco TÖLLER
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
Application filed by Kirchhoff Automotive Deutschland Gmbh filed Critical Kirchhoff Automotive Deutschland Gmbh
Publication of WO2020038967A1 publication Critical patent/WO2020038967A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a battery housing for an electric motor-driven vehicle, the battery housing has a frame structure and a plurality of battery module receptacles arranged within the frame structure, with battery module receptacles arranged transversely to an assumed collision direction running in the direction of the longitudinal or transverse frame parts of the frame structure one each extending between two opposite criztei len and connected to this cross strut are separated from each other, the at least one cross strut is a profile, the longitudinal extension of which follows the longitudinal extension of the cross strut and wherein the frame structure and the at least one cross strut separate the compartments individual battery module recordings from each other is formed.
  • battery modules are used as a power store.
  • Such battery modules are typically composed of a large number of individual batteries. These batteries are so-called high-voltage batteries. Certain requirements are placed on the accommodation of such battery modules, which are 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 must meet the required safety requirements in the event of force-related force inputs.
  • the tub part or the tub parts are enclosed by a frame structure which is arranged on the outside with respect to the side walls.
  • a frame structure is formed from individual profile sections which are assembled to form a frame profile.
  • a battery housing with such a tub part is known from US 201 1/0143179 A1. Extruded aluminum alloys are used as profile sections to save weight. Hollow chamber profiles, typically extruded aluminum profiles, are used.
  • 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 part is to be protected from damage by this.
  • longitudinal and transverse struts are arranged in it, which are supported with their end faces on the surfaces of the side walls facing each other. These struts serve the purpose of stiffening the tubs.
  • 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 strut or struts running in the direction of the impact to the side facing away from the impact. This typically acts against an abutment.
  • Such a battery housing is known from DE 10 2009 035 492 A1.
  • a battery with a stiffening structure has become known from DE 10 2016 008 170 A1.
  • the stiffening structure comprises two end plates, one of which is arranged on the flat side of the battery cell of the outside of such a battery module.
  • the end plates are connected with tensioning elements with the interposition of the individual battery cells.
  • the edges of the individual battery cells are enclosed by these.
  • the end plates In an extension of their plane, the end plates have projections through which the battery cells are spaced apart from the inner wall of a battery housing.
  • the end plates serve, as in the case of the subject of DE 10 2009 035 492 A1, for receiving or for transmitting impact energy.
  • the end plates are extruded profile sections with a profile direction that points in the direction of the height of the battery housing.
  • the spacing projections are provided for plastic deformation for energy absorption.
  • the design of the battery modules is complex.
  • there are high requirements for dimensional accuracy so that the individual battery modules with their projections adjoining one another End plates and with the outside projections on the inside of the battery housing and no gap between them and the inner wall of the battery housing remains.
  • Such battery housings are installed below or as part of the floor assembly of a vehicle. Laterally in front of the frame parts running in the longitudinal direction of the vehicle there is in each case a sill, which serves to absorb energy in the event of a side pole impact.
  • the invention is therefore based on the object of developing a battery housing for an electromotive vehicle of the type mentioned at the outset in order to improve its crash performance and to implement the improved crash Performance no additional installation space, at least no additional installation space that is worth mentioning is required.
  • an initially mentioned generic battery housing in which the battery housing holding means for fastening the bat teriemodule to be inserted into the battery housing to the one of the frame structure and the at least one Transverse strut formed compartments, by means of which at least those battery modules whose battery receptacle is limited by a frame part running transversely to the assumed direction of impact or a longitudinal member running parallel thereto and which is the front row of battery modules opposite the direction of the assumed direction of impact or in the direction of the assumed direction of impact The rearmost battery module row is held, at least on one side at a distance from this boundary - frame part or longitudinal member - in which distance section the at least one cross strut for absorbing impact energy has a lower strength than in its section separating two adjacent battery modules.
  • This battery case is distinguished in terms of the structure of its Ge characterized in that the at least one or typically the plurality of parallel struts arranged parallel to one another in a section have a lower strength to form a crash element.
  • This section of the at least one cross strut is the section with which such a cross strut is the distance from the battery module to a housing component - frame part or longitudinal member - arranged counter to the assumed direction of impact. Depending on the design of the battery housing, such a distance can be provided between the battery module and each housing part running parallel to the row of battery modules. In the remaining section of such a cross strut, this has a higher strength and thus a higher rigidity than in the aforementioned spacing sections.
  • the concept also includes the presence of a sill on the vehicle side against the direction of impact in front of the outer frame part, so that energy absorption in the battery housing only comes into play when the sill is no longer able to absorb any energy as a result of a deformation, or at least no significant energy. This is taken into account when designing the strength and thus the crash behavior of the spacing sections of the cross struts.
  • the distance to be maintained anyway between the battery modules arranged next to one another in the battery module receptacles is used by the housing component - frame part or longitudinal member - which limits such a battery module receptacle as a deformation path. Therefore, no additional installation space is required for the implementation. Rather, the available space is used optimally. Despite the improvement in crash performance, the weight of such a battery housing is also not increased.
  • the cross struts are designed as profiles, the longitudinal extent of the profiles following the longitudinal extent of the at least one cross strut.
  • a battery housing typically has a plurality of cross struts arranged parallel to one another. Energy to be absorbed thus acts on the cross struts in their longitudinal direction and thus in the direction in which they can absorb or absorb a particularly large amount of energy by forming work.
  • a profile for example a hollow chamber profile
  • the cross struts extend between two mutually opposite side walls of the frame structure and are connected to these.
  • the battery modules or battery module units arranged adjacent to an external housing component of the battery housing are spaced on both sides of this component and the cross struts are designed accordingly at their two ends, each with a spacing section with lower strength to form crash elements.
  • the cross struts extend through the interior of the frame structure as a whole, as well as from designs in which one or more longitudinal beams are arranged in the frame structure.
  • the longitudinal beams are typically continuous.
  • the cross struts are connected to the outer wall of the longitudinal strut.
  • the distance to be maintained between the battery module and the side member can also be used as a deformation path by designing the cross struts accordingly.
  • Such a cross strut which is made up of several individual pieces and is each designed separately by a longitudinal strut, extends between two mutually opposite side walls of the frame structure.
  • such a cross strut arrangement can also be regarded as a cross strut in the sense of the invention described in these documents.
  • the above-described concept of designing a battery housing can be realized if the direction of impact to be assumed runs in the y direction or also in the x direction.
  • the cross struts of the battery housing always run in the direction of the assumed impact direction.
  • the directions used in this version - x direction, y direction, z direction - are those in a driving direction usually marked in the industry.
  • the x direction is the direction of the longitudinal extent of the vehicle
  • the y direction is the transverse direction
  • the z direction is the direction of the height of the vehicle.
  • this transition is abrupt. This means that the transition from the section of lower strength to the section of higher strength without a transition section or, if such a section is present or cannot be avoided entirely, only with a very short transition section, based on the longitudinal extent of the cross strut is.
  • the different strength in the sections of such a cross strut can be brought about by a different cross-sectional geometry or cross-sectional area of the cross strut.
  • the cross-sectional area in the spacing sections is then smaller than in the firmer section of the cross strut.
  • Hollow chamber profiles are used as cross struts, for example.
  • a part of the profile can be removed or notched in the longitudinal extent of the cross strut.
  • a lower strength in such a spacing section of a cross strut can also be set up by a thermal treatment.
  • the cross struts are made of a hardened material, for example hardened steel.
  • the set hardness and thus the set strength in the spacer section or sections can then be reduced by a heat treatment step by selectively heating one or the two spacer sections of such a cross strut so that the material in the spacer sections is more ductile.
  • a cross strut is composed of two or more individual profiles.
  • the individual profiles are non-positive, preferably positive or material, following their longitudinal extension connected.
  • the first individual profile extends between the two opposite housing components that run transversely to the assumed direction of impact.
  • the second individual profile extends in that section of the cross strut which is in the alignment of the adjacent battery module or modules.
  • Such a cross strut reacts stiffer in this section than in the protruding over the length of the battery modules sections, which are then the stand sections from less strength.
  • a design is also possible in which the section of such a cross strut separating the adjacent battery modules is made of a first material with higher strength and this part is connected to a second part of lower strength or higher ductility forming the spacing section.
  • the lower strength of the spacer section or sections of such a cross strut for forming the deformation zone extending over the spacer section can also be brought about by a cutting cross-section change in the cross strut.
  • material is typically removed from opposite sides of the outside of the material. The consequence is that the strength is reduced compared to the sections that have not been weakened by the machining.
  • the sections with lower strength then represent set buckling points.
  • the battery modules which are arranged adjacent to one another, can also serve to adjust the section of a higher strength of the cross struts compared to the spacer sections with a lower strength, if they are designed accordingly.
  • the battery modules have a stable mounting plate. point and are attached with protruding fastening projections on the narrow sides of the cross struts or the outer frame part. If these attachment extensions of the battery modules are located at their end in or against the assumed direction of impact, or if they protrude slightly above this end, connecting the battery modules to the cross struts means that the area of higher strength through the attached fastening plates, namely the section located between the connection points.
  • the fleas of the cross struts are less than the height of the frame structure. Due to the different height of the frame structure or its frame parts compared to the height of the cross struts, the upper side of the cross struts can be arranged at a distance from the upper end of the frame structure, with a distance in the direction of the battery volume.
  • the difference in height provided in this way of the cross struts compared to the frame structure can be used to use the top of the cross struts for fastening the battery modules to be defined in the compartment, for example by connecting a mounting plate assigned to each battery module on the top of the cross struts, such as already stated above.
  • FIG. 1 is a perspective view of part of a battery housing for an electromotive vehicle
  • FIG. 2 a plan view of the battery housing of Figure 1
  • 3 shows a side view of a cross strut used to form a compartment of the battery housing
  • a battery housing 1 for an electromotive vehicle comprises a frame structure 2, which is formed in the illustrated embodiment from four frame parts, namely two longitudinal frame parts 3, 3.1 and two transverse frame parts 4, 4.1.
  • the frame parts 3, 3, 1, 4, 4.1 are miter cut with their mutually facing end faces and welded to one another.
  • the longitudinal frame parts 3, 3.1 run with their longitudinal extent in the longitudinal extent of the vehicle (x direction).
  • Cross struts 5 are inserted into this frame structure 2 to form individual battery module receptacles. These extend transversely to the longitudinal frame parts 3, 3.1 and parallel to the transverse frame parts 4, 4.1.
  • the cross struts 5 are connected with their front ends to the walls of the frame parts 3, 3.1 pointing into the interior of the frame structure 2.
  • each battery module receptacle 6 is transverse to the longitudinal extent of the frame parts 3, 3.1 by a cross strut 5 be limited.
  • two battery modules 7 are used in the exemplary embodiment shown.
  • the battery modules 7 have a fastening plate (not shown in more detail) from which the fastening extensions 8 protrude from the outline geometry of the battery modules 7, which rest on the narrow sides 9 of the two transverse struts 5 delimiting a battery module receptacle 6 in FIG.
  • Suitable fasteners By Suitable fasteners, the battery modules 7 to the cross struts 5 are closed.
  • the ends of the battery modules 7 facing the frame parts 3 and 3.1 are spaced apart from the inward-facing walls of these frame parts 3, 3.1, as can be seen above all from the top view of the battery housing 1 of FIG. 2. That section of a cross strut 5 which projects beyond the end of a battery module 7 to such a frame part 3 or 3.1 and extends to the inner wall of the respective frame part 3 or 3.1 is within the scope of this embodiment as a spacing section 10 , 10.1 addressed. In Figu ren 1 and 2, the spacer sections 10, 10.1 are identified on one of the cross struts 5. What is special about the battery housing 1 is the design of its cross struts 5. FIG. 3 shows such a cross strut 5 in a side view.
  • the spacer sections 10 and 10.1 are identified therein.
  • the section 11 between them corresponds to the required arrangement length of the two battery modules 7 inserted in a battery module receptacle 7.
  • the cross struts 5 have sections 10, 10.1 in the area of their spacing sections which are less strong than in section 1 located between the two spacing sections 10, 10.1 1.
  • the spacer sections 10, 10.1 are thus designed as crash elements which, due to their low strength, absorb energy through deformation in the event of an impact.
  • the lower strength of the cross struts 5 is brought about by a thermal treatment, by means of which the originally set hardness of the cross struts ben 5 has been reduced in order in this way to equip the spacer sections 10, 10.1 with more ductile properties.
  • the length of section 11 corresponds to the length required for the installation of the two battery modules 7 used in each battery module receptacle 6. Since in the case of energy absorption in each of the two spacer sections 10, 10.1, even after energy absorption has taken place, section 11 is still spaced from the respective frame parts 3 or 3.1 by the material of the spacer sections 10, 10.1, it is ensured that the deformation not up to the battery modules 7 extends out and still a certain safety stand between the battery modules 7 and the battery modules 7 facing inside of the frame parts 3 and 3.1 remains.
  • FIG. 4 shows an alternative embodiment of a cross strut 5.1.
  • the cross strut 5.1 is composed of two individual profiles 12, 12.1, which are arranged parallel to one another and are non-positively connected to one another over their length. Due to the duplication of the individual profiles in section 1.1, this section of the cross strut 5.1 is correspondingly stronger compared to the protruding sections of the individual profile 12 which form the spacing sections responsible for the crash performance.
  • the different strengths can also be provided in other ways.
  • FIGS. 5a to 5c schematically shows the crash performance of the battery housing 1 using a section of a cross strut 5.
  • FIG. 5a shows a section of the battery housing 1 before a side impact with a pile.
  • Figure 5b shows the battery housing 1 during a side impact, in which the spacing section 10 of the Cross strut 5 is completely deformed. As a result, energy has been reduced accordingly. All cross struts 5 on which the impact acts are involved in the reduction of the impact energy.
  • a pile impact was simulated.
  • FIG. 2c shows the cross strut 5, the two spacing sections 10, 10.1 of which have been completely deformed for energy dissipation.
  • FIG. 5 clearly shows that even in this situation there is still a distance between the end faces of the battery modules 7 facing the frame parts 3 and 3.1 and that the battery modules 7 are undamaged due to the energy absorption defined by the design of the spacing sections 10, 10.1 are.

Abstract

La présente invention concerne un boîtier de batterie (1) pour un véhicule entraîné par un moteur électrique, le boîtier de batterie comprenant une structure de cadre (2) et une pluralité de réceptacles de module de batterie (6) disposés à l'intérieur de la structure de cadre (2). Transversalement à une direction de l'impact supposée, s'étendant dans la direction des parties de cadre (3, 3.1 ; 4, 4.1) côté longitudinal ou transversal de la structure de cadre, les réceptacles de module de batterie (6) sont disposés adjacents, séparés les uns des autres à l'aide d'une entretoise transversale (5, 5.1) respective, s'étendant entre deux parties de cadre opposées l'une à l'autre et raccordée auxdites parties de cadre. L'au moins une entretoise transversale est un profilé dont l'extension longitudinale suit l'extension longitudinale de l'entretoise transversale, et un compartiment pour séparer les réceptacles de module de batterie individuels les uns des autres étant formé par la structure de cadre et l'au moins une entretoise transversale. Le boîtier de batterie (1) comprend un moyen de maintien pour fixer les modules de batterie (7) à insérer dans le boîtier de batterie (1) au compartiment formé par la structure de cadre (2) et l'au moins une entretoise transversale (5, 5.1), au moyen duquel moyen de maintien au moins les modules de batterie (7), dont le réceptacle de module de batterie (6) est limité par une partie de cadre (3, 3.1 ; 4, 4.1) s'étendant transversalement à la direction de l'impact supposée ou un longeron longitudinale parallèle à ladite partie de cadre, et qui est la rangée de modules de batterie la plus en avant par rapport à la direction de la direction d'impact supposée ou la rangée de modules de batterie la plus en arrière dans la direction de la direction d'impact supposée, est maintenu au moins sur un côté à une distance de cette limite, partie de cadre ou longeron, dans laquelle la section d'espacement (10, 10.1) de l'au moins une entretoise transversale (5, 5.1), pour absorber l'énergie d'impact, présente une résistance inférieure à la section (11, 11.1) séparant l'un de l'autre les deux modules de batterie (7) adjacents.
PCT/EP2019/072311 2018-08-21 2019-08-21 Boîtier de batterie WO2020038967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018120296.2A DE102018120296A1 (de) 2018-08-21 2018-08-21 Batteriegehäuse
DE102018120296.2 2018-08-21

Publications (1)

Publication Number Publication Date
WO2020038967A1 true WO2020038967A1 (fr) 2020-02-27

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ID=67777288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/072311 WO2020038967A1 (fr) 2018-08-21 2019-08-21 Boîtier de batterie

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DE (1) DE102018120296A1 (fr)
WO (1) WO2020038967A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020112794B4 (de) 2020-05-12 2022-03-24 Bayerische Motoren Werke Aktiengesellschaft Batteriegehäuse für eine Fahrzeugbatterie, derartige Fahrzeugbatterie und Kraftfahrzeug
DE102022110994B3 (de) 2022-05-04 2023-10-19 Audi Aktiengesellschaft Crashsystem
CN115360469B (zh) * 2022-10-20 2023-01-24 楚能新能源股份有限公司 一种电池包下箱体

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035492A1 (de) 2009-07-31 2011-02-03 Daimler Ag Batterie mit einer Vielzahl von plattenförmigen Batteriezellen
DE102009055852A1 (de) * 2009-11-26 2011-06-01 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug mit einer elektrischen Energiespeichereinheit
US20110143179A1 (en) 2009-12-10 2011-06-16 Yoji Nakamori Battery case
JP2015150927A (ja) * 2014-02-12 2015-08-24 日産自動車株式会社 バッテリの車載構造
DE202016102223U1 (de) * 2016-04-27 2016-05-18 GEDIA Gebrüder Dingerkus GmbH Batteriegehäuse
DE102016008170A1 (de) 2016-07-02 2017-02-16 Daimler Ag Batterie mit einer Versteifungsstruktur
DE102016110787A1 (de) * 2016-06-13 2017-12-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batteriegehäuse einer Traktionsbatterie eines Kraftfahrzeugs
DE102016120828A1 (de) * 2016-11-02 2018-05-03 Kirchhoff Automotive Deutschland Gmbh Batteriegehäuse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035492A1 (de) 2009-07-31 2011-02-03 Daimler Ag Batterie mit einer Vielzahl von plattenförmigen Batteriezellen
DE102009055852A1 (de) * 2009-11-26 2011-06-01 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug mit einer elektrischen Energiespeichereinheit
US20110143179A1 (en) 2009-12-10 2011-06-16 Yoji Nakamori Battery case
JP2015150927A (ja) * 2014-02-12 2015-08-24 日産自動車株式会社 バッテリの車載構造
DE202016102223U1 (de) * 2016-04-27 2016-05-18 GEDIA Gebrüder Dingerkus GmbH Batteriegehäuse
DE102016110787A1 (de) * 2016-06-13 2017-12-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Batteriegehäuse einer Traktionsbatterie eines Kraftfahrzeugs
DE102016008170A1 (de) 2016-07-02 2017-02-16 Daimler Ag Batterie mit einer Versteifungsstruktur
DE102016120828A1 (de) * 2016-11-02 2018-05-03 Kirchhoff Automotive Deutschland Gmbh Batteriegehäuse

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