EP3931902A1 - Battery system - Google Patents

Battery system

Info

Publication number
EP3931902A1
EP3931902A1 EP20734698.2A EP20734698A EP3931902A1 EP 3931902 A1 EP3931902 A1 EP 3931902A1 EP 20734698 A EP20734698 A EP 20734698A EP 3931902 A1 EP3931902 A1 EP 3931902A1
Authority
EP
European Patent Office
Prior art keywords
battery
wall
wedge
cell
accumulator cell
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20734698.2A
Other languages
German (de)
French (fr)
Inventor
Jonathan Gaiselmann
Felix Kammerer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marquardt GmbH
Original Assignee
Marquardt 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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP3931902A1 publication Critical patent/EP3931902A1/en
Pending legal-status Critical Current

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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 is based on a battery system according to the preamble of
  • Such battery systems are used in particular to supply power to a vehicle and / or to a consumer in the vehicle.
  • the vehicle can be a motor vehicle, a pedelec, an e-bike, an electric scooter, an LEV (Light Electric Vehicle) or the like.
  • the battery system can be a battery pack with an electrical voltage of 36 V or 48 V.
  • Such a battery system for supplying energy to an electrical consumer has a housing. At least one battery and / or accumulator cell is located in the housing.
  • the housing has a wall. It has been found to be disadvantageous that the battery and / or accumulator cell has a play in relation to the wall due to manufacturing and / or assembly tolerances. Furthermore, this game can change due to the aging of the battery and / or accumulator cell. This play can then in turn lead to impairment of the battery system, especially during its service life.
  • the invention is based on the object of further developing the battery system in such a way that the game is reduced.
  • the operational and / or functional reliability of the battery system is to be improved.
  • this object is achieved by the characterizing features of claim 1.
  • a tensioning element is arranged between the wall and the battery and / or accumulator cell adjacent to the wall.
  • This arrangement is designed, in particular, in such a way that an adjustable tensioning force can be exerted on the battery and / or accumulator cell.
  • the play for the battery and / or accumulator cell is thereby advantageously reduced, so that adverse effects on the battery system are largely avoided. Further refinements of the invention are the subject of the dependent claims.
  • the battery cell and / or accumulator cell adjacent to the wall can be arranged at a distance from the wall in the housing, such that a
  • Gap is formed between the wall and the battery and / or accumulator cell.
  • the clamping element can then in a simple manner
  • the battery cell and / or accumulator cell can have a prismatic shape which has a longitudinal side and a transverse side in a cost-effective manner.
  • the tensioning element can expediently be arranged on the longitudinal side of the battery and / or accumulator cell adjacent to the wall.
  • the tensioning element can comprise two wedge-shaped elements, each with a base and an inclined surface.
  • the two wedge-shaped elements can be arranged on their inclined surfaces lying against one another or in opposite directions.
  • one wedge-shaped element can rest with its base on the wall and the other wedge-shaped element with its base on the battery and / or accumulator cell adjacent to the wall.
  • the two wedge-shaped elements can be arranged fixed to one another in a functionally reliable manner.
  • the distance between the battery and / or accumulator cell adjacent to the wall and the wall can thereby be kept essentially constant during the service life of the battery and / or accumulator cell.
  • the tension force exerted on the battery and / or accumulator cell increases when the battery and / or accumulator cell increases during its service life.
  • At least one screw can be provided for fixing the two wedge-shaped elements.
  • the screw can pass through a holder in the one wedge-shaped element in a simple manner.
  • the screw can be screwed with a threaded receptacle in the other wedge-shaped element.
  • the cells In order for prismatic battery cells to work optimally and to make the best possible use of their service life, the cells should be preloaded with a certain force over the long side. These cells bulge due to charging and / or discharging processes and due to the aging of the cells. At the end of the service life, the pre-tensioning force is up to ten times higher than when it was installed.
  • This preload force should be absorbed by a structural element, e.g. the battery housing.
  • the manufacturing tolerances of the cells, the housing and / or other elements are contrary to a cost-efficient manufacturing and / or assembly.
  • the manufacturing tolerances should be maintained and compensated, the pretensioning force should be absorbed and at the same time these requirements should not make the assembly difficult.
  • the invention thus realizes an inexpensive and easy-to-assemble battery system. Furthermore, no individual parts need to be measured and / or adjusted when assembling the battery system. So can it
  • Battery system can be assembled in series assembly regardless of individual tolerances and does not have to be manufactured. Finally, in an advantageous manner
  • Pre-tensioning force can be set individually according to the respective charge state of the cells and / or the manufacturing tolerances of the components.
  • FIG. 1 shows a battery system with a housing and a clamping element in
  • FIG. 2 shows the battery system from FIG. 1, the housing being omitted.
  • FIG. 3 shows a section along the line 3-3 in FIG. 1,
  • Fig. 4 is a section along the line 4-4 in Fig. 1,
  • FIG. 5 shows the clamping element as an individual part from direction V in FIG. 2,
  • FIG. 6 shows the clamping element from the opposite direction to FIG. 5 and
  • the battery system 1 shows a battery system 1 for a motor vehicle, the battery system 1 serving to supply energy to an electrical consumer in the motor vehicle.
  • the battery system 1 has a housing 2, in which the cover is removed in FIG. 1 so that the interior of the housing 2 is visible.
  • the housing 2 is approximately cuboid and has a wall 3. More precisely, the housing 2 has two side walls 3, 3 'arranged parallel to one another and two longitudinal walls 4, 4' which are approximately perpendicular to the side walls 3, 3 'and are arranged parallel to one another, as well as a base 5 and the cover, not shown further.
  • Inside the housing 2 there is at least one battery and / or accumulator cell 6.
  • a plurality of battery and / or accumulator cells 6, 6 ′ are located in the housing 2, which are parallel to one another according to the desired electrical voltage and / or capacity of the battery system 1 and / or are connected in series.
  • the battery and / or accumulator cells 6, 6 ′ have a prismatic and / or cuboid shape, which has a longitudinal side 7 and a transverse side 8.
  • a plurality of battery and / or accumulator cells 6, 6 ′ are arranged on the longitudinal sides 7 lying against one another and lying next to one another in the manner of a cell stack 9.
  • the cell stack 9 is arranged in a fixed manner in the housing 2. For this purpose, according to FIG. 1, a
  • Clamping element 10 is arranged between one wall 3 and the battery and / or accumulator cell 6 of the cell stack 9 adjacent to the wall 3. With the help of the clamping element 10, a clamping force F (see FIG. 7) can be exerted on the battery and / or accumulator cell 6 and thereby also on the further battery and / or accumulator cells 6 'or the cell stack 9, the clamping force F being adjustable in particular is.
  • the battery and / or accumulator cell 6 adjacent to the wall 3 is expediently arranged at a distance d from the wall 3 in the housing 2, as shown in FIG. As a result, an intermediate space 11 is formed between the wall 3 and the battery and / or accumulator cell 6.
  • the clamping element 10 is then arranged in this intermediate space 11, namely the clamping element 10 is arranged on the longitudinal side 7 of the battery and / or accumulator cell 6 adjacent to the wall 3.
  • the clamping element 10 comprises two wedge-shaped elements 10 ', 10 ".
  • the wedge-shaped elements 10', 10" each have a base surface 12 and an inclined surface 13.
  • the two wedge-shaped elements 10 ', 10 "are one wedge-shaped element 10 ′ rests with its base 12 on the wall 3.
  • the other wedge-shaped element 10 ′′ has its base 12 on the battery and / or battery adjacent to the wall 3
  • the two wedge-shaped elements 10 ', 10 are easily arranged along their inclined surfaces 13 by exerting a force in the direction of the arrow 14, as shown in FIG 7 is movable.
  • the two wedge-shaped elements 10 ', 10 are fixed to one another.
  • the wedge-shaped elements 10', 10" are arranged so fixed to one another that the distance d between the battery adjacent to the wall 3 - and / or accumulator cell 6 and the wall 3 is essentially constant during the life of the battery and / or accumulator cell 6, 6 '.
  • the tensioning force F exerted on the battery and / or accumulator cell 6 by the tensioning element 10 increases when the battery and / or accumulator cell 6, 6 'during its service life, for example in the direction the transverse page 8, enlarged.
  • the battery system 1 is effectively prevented from being impaired during its service life.
  • the fixation for the clamping element 10 can be seen in more detail in FIG.
  • At least one screw 15 is provided for fixing the two wedge-shaped elements 10 ', 10 ".
  • the screw 15 penetrates a holder 16 in the one wedge-shaped element 10'.
  • the screw 15 is screwed to a threaded receptacle 17 in the other wedge-shaped element 10 ′′.
  • the invention is not restricted to the exemplary embodiment described and illustrated. Rather, it also includes all technical developments within the scope of the invention defined by the patent claims.
  • the battery system 1 according to the invention is not only suitable for motor vehicles but also for other vehicles such as pedelecs or e-bikes or electric scooters or for other LEVs (light electric vehicles), for example for tricycles, cargo bikes, quads or the like. Furthermore, the invention can be used not only in vehicles but also in battery systems
  • 6,6 ' battery and / or accumulator cell

Abstract

The invention relates to a battery system (1), in particular for a vehicle, such as a motor vehicle, pedelec, e-bike, electric scooter, LEV (light electric vehicle) or similar, for supplying energy to an electrical consumer. The battery system (1) comprises a housing (2) having a wall (3), and at least one battery and/or accumulator cell (6) located in the housing (2). A clamping element (10) is arranged between the wall (3) and the battery and/or accumulator cell (6) adjacent to the wall (3), in particular in such a way that an adjustable clamping force can be exerted on the battery and/or accumulator cell (6).

Description

Batteriesystem Battery system
Die Erfindung geht aus von einem Batteriesystem nach dem Oberbegriff des The invention is based on a battery system according to the preamble of
Patentanspruchs 1. Claim 1.
Solche Batteriesysteme dienen insbesondere zur Energieversorgung für ein Fahrzeug und/oder für einen Verbraucher im Fahrzeug. Bei dem Fahrzeug kann es sich um ein Kraftfahrzeug, ein Pedelec, ein E-Bike, einen Elektroroller, ein LEV (Light Electric Vehicle) o. dgl. handeln. Beispielsweise kann es sich bei dem Batteriesystem um ein Battery Pack mit einer elektrischen Spannung von 36 V oder 48 V handeln. Such battery systems are used in particular to supply power to a vehicle and / or to a consumer in the vehicle. The vehicle can be a motor vehicle, a pedelec, an e-bike, an electric scooter, an LEV (Light Electric Vehicle) or the like. For example, the battery system can be a battery pack with an electrical voltage of 36 V or 48 V.
Ein derartiges Batteriesystem zur Energieversorgung eines elektrischen Verbrauchers besitzt ein Gehäuse. Im Gehäuse befindet sind wenigstens eine Batterie- und/oder Akkuzelle. Such a battery system for supplying energy to an electrical consumer has a housing. At least one battery and / or accumulator cell is located in the housing.
Meistens sind jedoch mehrere Batterie- und/oder Akkuzellen im Gehäuse befindlich, wobei die Batterie- und/oder Akkuzellen seriell und/oder parallel miteinander verschaltet sind. Das Gehäuse weist eine Wandung auf. Als nachteilig hat sich herausgestellt, dass die Batterie- und/oder Akkuzelle aufgrund von Fertigungs- und/oder Montagetoleranzen ein Spiel zur Wandung besitzt. Des Weiteren kann sich dieses Spiel aufgrund von Alterung der Batterie- und/oder Akkuzelle verändern. Dieses Spiel kann dann wiederum zur Beeinträchtigung des Batteriesystems, insbesondere während dessen Gebrauchsdauer, führen. Usually, however, there are several battery and / or accumulator cells in the housing, the battery and / or accumulator cells being connected to one another in series and / or in parallel. The housing has a wall. It has been found to be disadvantageous that the battery and / or accumulator cell has a play in relation to the wall due to manufacturing and / or assembly tolerances. Furthermore, this game can change due to the aging of the battery and / or accumulator cell. This play can then in turn lead to impairment of the battery system, especially during its service life.
Der Erfindung liegt die Aufgabe zugrunde, das Batteriesystem derart weiterzuentwickeln, dass das Spiel reduziert ist. Insbesondere soll die Betriebs- und/oder Funktionssicherheit des Batteriesystems verbessert werden. Diese Aufgabe wird bei einem gattungsgemäßen Batteriesystem durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. The invention is based on the object of further developing the battery system in such a way that the game is reduced. In particular, the operational and / or functional reliability of the battery system is to be improved. In a battery system of the generic type, this object is achieved by the characterizing features of claim 1.
Beim erfindungsgemäßen Batteriesystem ist ein Spannelement zwischen der Wandung und der zur Wandung benachbarten Batterie- und/oder Akkuzelle angeordnet. Diese Anordnung ist insbesondere derart ausgestaltet, dass eine einstellbare Spannkraft auf die Batterie- und/oder Akkuzelle ausübbar ist. In vorteilhafter Weise wird dadurch das Spiel für die Batterie- und/oder Akkuzelle reduziert, so dass Beeinträchtigungen des Batteriesystems weitgehend vermieden sind. Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. In the battery system according to the invention, a tensioning element is arranged between the wall and the battery and / or accumulator cell adjacent to the wall. This arrangement is designed, in particular, in such a way that an adjustable tensioning force can be exerted on the battery and / or accumulator cell. The play for the battery and / or accumulator cell is thereby advantageously reduced, so that adverse effects on the battery system are largely avoided. Further refinements of the invention are the subject of the dependent claims.
In weiterer Ausgestaltung kann die zur Wandung benachbarte Batterie- und/oder Akkuzelle mit einem Abstand zur Wandung im Gehäuse angeordnet sein, derart dass ein In a further embodiment, the battery cell and / or accumulator cell adjacent to the wall can be arranged at a distance from the wall in the housing, such that a
Zwischenraum zwischen der Wandung und der Batterie- und/oder Akkuzelle gebildet ist. Zweckmäßigerweise kann das Spannelement dann in einfacher Art und Weise im Gap is formed between the wall and the battery and / or accumulator cell. Appropriately, the clamping element can then in a simple manner
Zwischenraum angeordnet sein. Be arranged space.
Bei entsprechender Größe des Gehäuses können mehrere Batterie- und/oder Akkuzellen aneinander liegend in der Art eines Zellenstapels bzw. Zellpacks im Gehäuse angeordnet sein. Die Batterie- und/oder Akkuzelle kann in kostengünstiger Weise eine prismatische Gestalt, die eine Längsseite sowie eine Querseite aufweist, besitzen. Zweckmäßigerweise kann das Spannelement an der Längsseite der zur Wandung benachbarten Batterie- und/oder Akkuzelle angeordnet sein. With a corresponding size of the housing, several battery cells and / or accumulator cells can be arranged in the housing in the manner of a cell stack or cell pack lying next to one another. The battery cell and / or accumulator cell can have a prismatic shape which has a longitudinal side and a transverse side in a cost-effective manner. The tensioning element can expediently be arranged on the longitudinal side of the battery and / or accumulator cell adjacent to the wall.
In einfacher Ausgestaltung kann das Spannelement zwei keilförmige Elemente mit jeweils einer Grundfläche sowie einer Schrägfläche umfassen. Die beiden keilförmigen Elemente können an deren Schrägflächen aneinander liegend sowie gegenläufig angeordnet sein. Des Weiteren kann das eine keilförmige Element mit dessen Grundfläche an der Wandung sowie das andere keilförmige Element mit dessen Grundfläche an der zur Wandung benachbarten Batterie- und/oder Akkuzelle anliegen. In funktionssicherer Art und Weise können die beiden keilförmigen Elemente zueinander fixiert angeordnet sein. Insbesondere kann dadurch der Abstand zwischen der zur Wandung benachbarten Batterie- und/oder Akkuzelle und der Wandung während der Lebensdauer der Batterie- und/oder Akkuzelle im Wesentlichen konstant gehalten sein. In diesem Fall erhöht sich die auf die Batterie- und/oder Akkuzelle ausgeübte Spannkraft somit, wenn die Batterie- und/oder Akkuzelle sich während deren Lebensdauer vergrößert. In a simple embodiment, the tensioning element can comprise two wedge-shaped elements, each with a base and an inclined surface. The two wedge-shaped elements can be arranged on their inclined surfaces lying against one another or in opposite directions. Furthermore, one wedge-shaped element can rest with its base on the wall and the other wedge-shaped element with its base on the battery and / or accumulator cell adjacent to the wall. The two wedge-shaped elements can be arranged fixed to one another in a functionally reliable manner. In particular, the distance between the battery and / or accumulator cell adjacent to the wall and the wall can thereby be kept essentially constant during the service life of the battery and / or accumulator cell. In this case, the tension force exerted on the battery and / or accumulator cell increases when the battery and / or accumulator cell increases during its service life.
Zwecks einfacher Montage und/oder der Kostengünstigkeit halber kann wenigstens eine Schraube zur Fixierung der beiden keilförmigen Elemente vorgesehen sein. Die Schraube kann in einfacher Art und Weise eine Halterung in dem einen keilförmigen Element durchsetzen. Des Weiteren kann die Schraube mit einer Gewindeaufnahme in dem anderen keilförmigen Element verschraubt sein. In vorteilhafter Weise ist somit auch eine einfache Justierbarkeit der auf die Batterie- und/oder Akkuzelle ausgeübten Spannkraft während der Montage des Batteriesystems ermöglicht. For the purpose of simple assembly and / or for the sake of cost-effectiveness, at least one screw can be provided for fixing the two wedge-shaped elements. The screw can pass through a holder in the one wedge-shaped element in a simple manner. Furthermore, the screw can be screwed with a threaded receptacle in the other wedge-shaped element. In an advantageous manner, a simple adjustability of the tension force exerted on the battery and / or accumulator cell during the assembly of the battery system is thus also made possible.
Für eine besonders bevorzugte Ausgestaltung der Erfindung ist nachfolgendes festzustellen. The following is to be stated for a particularly preferred embodiment of the invention.
Damit prismatische Batteriezellen optimal arbeiten und die Lebensdauer bestmöglich ausgenützt werden kann, sollen die Zellen mit einer gewissen Kraft über die Längsseite vorgespannt werden. Durch Lade- und/oder Entladevorgänge sowie aufgrund der Alterung der Zellen bauchen diese Zellen auf. Am Ende der Lebenszeit beträgt die Vorspannkraft dann einen bis zu zehnmal höheren Wert als beim Verbauzustand. In order for prismatic battery cells to work optimally and to make the best possible use of their service life, the cells should be preloaded with a certain force over the long side. These cells bulge due to charging and / or discharging processes and due to the aging of the cells. At the end of the service life, the pre-tensioning force is up to ten times higher than when it was installed.
Diese Vorspannkraft soll von einem konstruktiven Element, z.B. dem Batteriegehäuse, aufgenommen werden. Die Fertigungstoleranzen der Zellen, des Gehäuses und/oder weiterer Elemente sind gegenläufig zu einer kosteneffizienten Fertigung und/oder Montage. Die Fertigungstoleranzen sollen vorgehalten und ausgeglichen werden, die Vorspannkraft soll aufgenommen werden und gleichzeitig sollen diese Anforderungen die Montage nicht erschweren. This preload force should be absorbed by a structural element, e.g. the battery housing. The manufacturing tolerances of the cells, the housing and / or other elements are contrary to a cost-efficient manufacturing and / or assembly. The manufacturing tolerances should be maintained and compensated, the pretensioning force should be absorbed and at the same time these requirements should not make the assembly difficult.
Mittels zwei gegenläufigen Keilen, die zwischen dem Zellpack der Batterie- und/oder Akkuzellen und dem Gehäuse angebracht werden, wird erfindungsgemäß die Fertigungstoleranz kompensiert. Gleichzeitig wird die Vorspannkraft über diese Keile auf den Zellpack übertragen. By means of two opposing wedges, which are attached between the cell pack of the battery and / or accumulator cells and the housing, the Compensated for manufacturing tolerance. At the same time, the pretensioning force is transmitted to the cell pack via these wedges.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass die The advantages achieved by the invention are in particular that the
Fertigungstoleranzen der Einzelteile nicht reduziert werden müssen, was eine Manufacturing tolerances of the items do not have to be reduced, which is a
Preissteigerung mit sich bringen würde. Somit realisiert die Erfindung ein kostengünstiges sowie einfach zu montierendes Batteriesystem. Des Weiteren müssen bei der Montage des Batteriesystems keine Einzelteile gemessen und/oder justiert werden. So kann das Would bring price increases. The invention thus realizes an inexpensive and easy-to-assemble battery system. Furthermore, no individual parts need to be measured and / or adjusted when assembling the battery system. So can it
Batteriesystem in der Serienmontage unabhängig von Einzeltoleranzen montiert werden und muss nicht manufakturiert werden. Schließlich kann in vorteilhafter Weise die Battery system can be assembled in series assembly regardless of individual tolerances and does not have to be manufactured. Finally, in an advantageous manner
Vorspannkraft individuell nach dem jeweiligen Ladezustand der Zellen und/oder den Fertigungstoleranzen der Bauteile eingestellt werden. Pre-tensioning force can be set individually according to the respective charge state of the cells and / or the manufacturing tolerances of the components.
Ein Ausführungsbeispiel der Erfindung mit verschiedenen Weiterbildungen und An embodiment of the invention with various developments and
Ausgestaltungen ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigen Refinements are shown in the drawings and are described in more detail below. Show it
Fig. 1 ein Batteriesystem mit einem Gehäuse und einem Spannelement in 1 shows a battery system with a housing and a clamping element in
perspektivischer Ansicht, perspective view,
Fig. 2 das Batteriesystem aus Fig. 1 , wobei das Gehäuse weggelassen ist. FIG. 2 shows the battery system from FIG. 1, the housing being omitted.
Fig. 3 einen Schnitt entlang der Linie 3-3 in Fig. 1 , 3 shows a section along the line 3-3 in FIG. 1,
Fig. 4 einen Schnitt entlang der Linie 4-4 in Fig. 1, Fig. 4 is a section along the line 4-4 in Fig. 1,
Fig. 5 das Spannelement als Einzelteil aus Richtung V in Fig. 2 gesehen, FIG. 5 shows the clamping element as an individual part from direction V in FIG. 2,
Fig. 6 das Spannelement aus der Gegenrichtung zur Fig. 5 gesehen und FIG. 6 shows the clamping element from the opposite direction to FIG. 5 and
Fig. 7 eine Prinzipskizze des Batteriesystems zur Erläuterung der Wirkungsweise 7 shows a schematic diagram of the battery system to explain the mode of operation
des Spannelements. In Fig. 1 ist ein Batteriesystem 1 für ein Kraftfahrzeug zu sehen, wobei das Batteriesystem 1 zur Energieversorgung eines elektrischen Verbrauchers im Kraftfahrzeug dient. Das Batteriesystem 1 besitzt ein Gehäuse 2, bei dem in Fig. 1 der Deckel abgenommen ist, so dass das Innere des Gehäuses 2 sichtbar ist. Das Gehäuse 2 ist vorliegend in etwa quaderförmig ausgestaltet und weist eine Wandung 3 auf. Präziser gesagt, weist das Gehäuse 2 zwei parallel zueinander angeordnete Seitenwände 3, 3' und zwei in etwa senkrecht zu den Seitenwänden 3, 3' stehende, parallel zueinander angeordnete Längswände 4, 4' sowie einen Boden 5 und den nicht weiter gezeigten Deckel auf. Im Inneren des Gehäuses 2 befindet sich wenigstens eine Batterie- und/oder Akkuzelle 6. Vorliegend sind im Gehäuse 2 mehrere Batterie- und/oder Akkuzellen 6, 6' befindlich, die entsprechend der gewünschten elektrischen Spannung und/oder Kapazität des Batteriesystems 1 miteinander parallel und/oder seriell verschaltet sind. of the clamping element. 1 shows a battery system 1 for a motor vehicle, the battery system 1 serving to supply energy to an electrical consumer in the motor vehicle. The battery system 1 has a housing 2, in which the cover is removed in FIG. 1 so that the interior of the housing 2 is visible. In the present case, the housing 2 is approximately cuboid and has a wall 3. More precisely, the housing 2 has two side walls 3, 3 'arranged parallel to one another and two longitudinal walls 4, 4' which are approximately perpendicular to the side walls 3, 3 'and are arranged parallel to one another, as well as a base 5 and the cover, not shown further. Inside the housing 2 there is at least one battery and / or accumulator cell 6. In the present case, a plurality of battery and / or accumulator cells 6, 6 ′ are located in the housing 2, which are parallel to one another according to the desired electrical voltage and / or capacity of the battery system 1 and / or are connected in series.
Wie man der Fig. 2 entnimmt, besitzen die Batterie- und/oder Akkuzellen 6, 6' eine prismatische und/oder quaderförmige Gestalt, die eine Längsseite 7 sowie eine Querseite 8 aufweist. Mehrere Batterie- und/oder Akkuzellen 6, 6' sind an den Längsseiten 7 aneinander liegend sowie nebeneinander liegend in der Art eines Zellenstapels 9 angeordnet. Der Zellenstapel 9 ist fixiert im Gehäuse 2 angeordnet. Hierzu ist gemäß Fig. 1 ein As can be seen from FIG. 2, the battery and / or accumulator cells 6, 6 ′ have a prismatic and / or cuboid shape, which has a longitudinal side 7 and a transverse side 8. A plurality of battery and / or accumulator cells 6, 6 ′ are arranged on the longitudinal sides 7 lying against one another and lying next to one another in the manner of a cell stack 9. The cell stack 9 is arranged in a fixed manner in the housing 2. For this purpose, according to FIG. 1, a
Spannelement 10 zwischen der einen Wandung 3 und der zur Wandung 3 benachbarten Batterie- und/oder Akkuzelle 6 des Zellenstapels 9 angeordnet. Mit Hilfe des Spannelements 10 ist eine Spannkraft F (siehe Fig. 7) auf die Batterie- und/oder Akkuzelle 6 sowie dadurch auch auf die weiteren Batterie- und/oder Akkuzellen 6' beziehungsweise den Zellenstapel 9 ausübbar, wobei die Spannkraft F insbesondere einstellbar ist. Clamping element 10 is arranged between one wall 3 and the battery and / or accumulator cell 6 of the cell stack 9 adjacent to the wall 3. With the help of the clamping element 10, a clamping force F (see FIG. 7) can be exerted on the battery and / or accumulator cell 6 and thereby also on the further battery and / or accumulator cells 6 'or the cell stack 9, the clamping force F being adjustable in particular is.
Um das Spannelement 10 im Gehäuse 2 unterzubringen, ist zweckmäßigerweise die zur Wandung 3 benachbarte Batterie- und/oder Akkuzelle 6 mit einem Abstand d zur Wandung 3 im Gehäuse 2 angeordnet, wie in Fig. 7 gezeigt ist. Dadurch ist ein Zwischenraum 11 zwischen der Wandung 3 und der Batterie- und/oder Akkuzelle 6 gebildet. Das In order to accommodate the clamping element 10 in the housing 2, the battery and / or accumulator cell 6 adjacent to the wall 3 is expediently arranged at a distance d from the wall 3 in the housing 2, as shown in FIG. As a result, an intermediate space 11 is formed between the wall 3 and the battery and / or accumulator cell 6. The
Spannelement 10 ist dann in diesem Zwischenraum 11 angeordnet, und zwar ist das Spannelement 10 an der Längsseite 7 der zur Wandung 3 benachbarten Batterie- und/oder Akkuzelle 6 angeordnet. Wie man näher in Fig. 3 sieht, umfasst das Spannelement 10 zwei keilförmige Elemente 10', 10". Die keilförmigen Elemente 10', 10" besitzen jeweils eine Grundfläche 12 sowie eine Schrägfläche 13. Die beiden keilförmigen Elemente 10', 10" sind an deren Schrägflächen 13 aneinander liegend sowie gegenläufig angeordnet. Das eine keilförmige Element 10' liegt mit dessen Grundfläche 12 an der Wandung 3 an. Das andere keilförmige Element 10" liegt mit dessen Grundfläche 12 an der zur Wandung 3 benachbarten Batterie- und/oder The clamping element 10 is then arranged in this intermediate space 11, namely the clamping element 10 is arranged on the longitudinal side 7 of the battery and / or accumulator cell 6 adjacent to the wall 3. As can be seen in more detail in FIG. 3, the clamping element 10 comprises two wedge-shaped elements 10 ', 10 ". The wedge-shaped elements 10', 10" each have a base surface 12 and an inclined surface 13. The two wedge-shaped elements 10 ', 10 "are one wedge-shaped element 10 ′ rests with its base 12 on the wall 3. The other wedge-shaped element 10 ″ has its base 12 on the battery and / or battery adjacent to the wall 3
Akkuzelle 6 an. Zur Einstellung und/oder Justierung der Spannkraft F, beispielsweise bei der Montage des Batteriesystems 1, sind die beiden keilförmigen Elemente 10', 10" in einfacher Art und Weise entlang deren Schrägflächen 13 durch Ausübung einer Kraft in Richtung des Pfeiles 14, wie in Fig. 7 gezeigt ist, bewegbar. Battery cell 6 on. To set and / or adjust the clamping force F, for example during the assembly of the battery system 1, the two wedge-shaped elements 10 ', 10 "are easily arranged along their inclined surfaces 13 by exerting a force in the direction of the arrow 14, as shown in FIG 7 is movable.
Nach der Einstellung und/oder Justierung der Spannkraft F werden die beiden keilförmigen Elemente 10', 10 " zueinander fixiert. Und zwar sind die keilförmigen Elemente 10', 10" derart fixiert zueinander angeordnet, dass der Abstand d zwischen der zur Wandung 3 benachbarten Batterie- und/oder Akkuzelle 6 und der Wandung 3 während der Lebensdauer der Batterie- und/oder Akkuzelle 6, 6' im Wesentlichen konstant ist. Wie man der Fig. 7 entnehmen kann, erhöht sich dann die auf die Batterie- und/oder Akkuzelle 6 durch das Spannelement 10 ausgeübte Spannkraft F, wenn die Batterie- und/oder Akkuzelle 6, 6' sich während deren Lebensdauer, beispielsweise in Richtung der Querseite 8, vergrößert. Mit Hilfe des Spannelements 10 ist jedoch eine Beeinträchtigung des Batteriesystems 1 während dessen Lebensdauer in wirksamer Weise verhindert. After the clamping force F has been set and / or adjusted, the two wedge-shaped elements 10 ', 10 "are fixed to one another. In fact, the wedge-shaped elements 10', 10" are arranged so fixed to one another that the distance d between the battery adjacent to the wall 3 - and / or accumulator cell 6 and the wall 3 is essentially constant during the life of the battery and / or accumulator cell 6, 6 '. As can be seen from FIG. 7, the tensioning force F exerted on the battery and / or accumulator cell 6 by the tensioning element 10 increases when the battery and / or accumulator cell 6, 6 'during its service life, for example in the direction the transverse page 8, enlarged. With the aid of the clamping element 10, however, the battery system 1 is effectively prevented from being impaired during its service life.
Die Fixierung für das Spannelement 10 ist näher in Fig. 4 zu sehen. Es ist wenigstens eine Schraube 15 zur Fixierung der beiden keilförmigen Elemente 10', 10" vorgesehen. Wie weiter anhand der Fig. 5 zu sehen ist, durchsetzt die Schraube 15 eine Halterung 16 in dem einen keilförmigen Element 10'. Weiterhin ist gemäß Fig. 6 die Schraube 15 mit einer Gewindeaufnahme 17 in dem anderen keilförmigen Element 10" verschraubt. Zur besonders sicheren Fixierung bietet es sich an, zwei Schrauben 15 an den einander gegenüberliegenden Enden der beiden keilförmigen Elemente 10', 10" vorzusehen. Die Erfindung ist nicht auf das beschriebene und dargestellte Ausführungsbeispiel beschränkt. Sie umfasst vielmehr auch alle fachmännischen Weiterbildungen im Rahmen der durch die Patentansprüche definierten Erfindung. So ist das erfindungsgemäße Batteriesystem 1 nicht nur für Kraftfahrzeuge sondern auch für sonstige Fahrzeuge, wie Pedelecs oder E-Bikes oder Elektroroller oder für sonstige LEV(Light Electric Vehicles)s, beispielsweise für Dreiräder, Lastenfahrräder, Quads o. dgl., geeignet. Des Weiteren kann die Erfindung nicht nur in Fahrzeugen sondern auch in Batteriesystemen zur The fixation for the clamping element 10 can be seen in more detail in FIG. At least one screw 15 is provided for fixing the two wedge-shaped elements 10 ', 10 ". As can also be seen with reference to FIG. 5, the screw 15 penetrates a holder 16 in the one wedge-shaped element 10'. Furthermore, according to FIG. 6 the screw 15 is screwed to a threaded receptacle 17 in the other wedge-shaped element 10 ″. For particularly secure fixation, it is advisable to provide two screws 15 at the opposite ends of the two wedge-shaped elements 10 ', 10 ". The invention is not restricted to the exemplary embodiment described and illustrated. Rather, it also includes all technical developments within the scope of the invention defined by the patent claims. The battery system 1 according to the invention is not only suitable for motor vehicles but also for other vehicles such as pedelecs or e-bikes or electric scooters or for other LEVs (light electric vehicles), for example for tricycles, cargo bikes, quads or the like. Furthermore, the invention can be used not only in vehicles but also in battery systems
Energieversorgung eines sonstigen elektrischen Verbrauchers Verwendung finden. Find energy supply of another electrical consumer use.
Bezugszeichen-Liste: Reference symbol list:
1 : Batteriesystem 1: battery system
2: Gehäuse 2: housing
3,3': Wandung / Seiten wand (von Gehäuse) 3.3 ': wall / side wall (of housing)
4,4': Längswand (von Gehäuse) 4,4 ': longitudinal wall (of housing)
5: Boden (von Gehäuse) 5: bottom (of housing)
6,6': Batterie- und/oder Akkuzelle 6,6 ': battery and / or accumulator cell
7: Längsseite (von Batterie- und/oder Akkuzelle) 7: Long side (of battery and / or accumulator cell)
8: Querseite (von Batterie- und/oder Akkuzelle)8: Cross side (of battery and / or accumulator cell)
9: Zellenstapel 9: Cell stack
10: Spannelement 10: Clamping element
10': keilförmiges Element (von Spannelement) 10 ': wedge-shaped element (from clamping element)
10": keilförmiges Element (von Spannelement)10 ": wedge-shaped element (from clamping element)
1 1 : Zwischenraum 1 1: space
12: Grundfläche (von keilförmigen Element) 12: base area (of wedge-shaped element)
13 : Schrägfläche (von keilförmigen Element) 13: Inclined surface (of wedge-shaped element)
14: Pfeil (für Verschiebung von keilförmigen Element) 14: Arrow (for moving a wedge-shaped element)
15: Schraube 15: screw
16: Halterung ( in keilförmigen Element) 16: Bracket (in wedge-shaped element)
17: Gewindeaufnahme (in keilförmigen Element) 17: Thread mount (in wedge-shaped element)

Claims

P a t e n t a n s p r ü c h e : P atent claims:
1. Batteriesystem, insbesondere für ein Fahrzeug, wie ein Kraftfahrzeug, ein Pedelec, ein E-Bike, einen Elektroroller, ein LEV (Light Electric Vehicle) o. dgl., zur 1. Battery system, in particular for a vehicle such as a motor vehicle, a pedelec, an e-bike, an electric scooter, an LEV (Light Electric Vehicle) or the like
Energieversorgung eines elektrischen Verbrauchers, mit einem eine Wandung (3) aufweisenden Gehäuse (2), und mit wenigstens einer im Gehäuse (2) befindlichen Batterie- und/oder Akkuzelle (6), dadurch gekennzeichnet, dass ein Spannelement (10) zwischen der Wandung (3) und der zur Wandung (3) benachbarten Batterie- und/oder Akkuzelle (6) angeordnet ist, insbesondere derart dass eine einstellbare Spannkraft (F) auf die Batterie- und/oder Akkuzelle (6) ausübbar ist. Energy supply of an electrical consumer, with a housing (2) having a wall (3), and with at least one battery and / or accumulator cell (6) located in the housing (2), characterized in that a clamping element (10) between the wall (3) and the battery and / or accumulator cell (6) adjacent to the wall (3), in particular such that an adjustable clamping force (F) can be exerted on the battery and / or accumulator cell (6).
2. Batteriesystem nach Anspruch 1, dadurch gekennzeichnet, dass die zur Wandung (3) benachbarte Batterie- und/oder Akkuzelle (6) mit einem Abstand (d) zur Wandung (3) im Gehäuse (2) angeordnet ist, derart dass ein Zwischenraum (1 1) zwischen der Wandung (3) und der Batterie- und/oder Akkuzelle (6) gebildet ist, und dass vorzugsweise das 2. Battery system according to claim 1, characterized in that the battery and / or accumulator cell (6) adjacent to the wall (3) is arranged at a distance (d) from the wall (3) in the housing (2), such that a gap (1 1) is formed between the wall (3) and the battery and / or accumulator cell (6), and that preferably the
Spannelement (10) im Zwischenraum (11 ) angeordnet ist. Clamping element (10) is arranged in the space (11).
3. Batteriesystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere Batterie- und/oder Akkuzellen (6, 6') aneinander liegend in der Art eines Zellenstapels (9) im Gehäuse (2) angeordnet sind, dass vorzugsweise die Batterie- und/oder Akkuzelle (6, 6') eine prismatische Gestalt, die eine Längsseite (7) sowie eine Querseite aufweist (8), besitzt, und dass weiter vorzugsweise das Spannelement (10) an der Längsseite (7) der zur Wandung (3) benachbarten Batterie- und/oder Akkuzelle (6) angeordnet ist. 3. Battery system according to claim 1 or 2, characterized in that several battery and / or accumulator cells (6, 6 ') are arranged lying next to one another in the manner of a cell stack (9) in the housing (2), that preferably the battery and / or battery cell (6, 6 ') has a prismatic shape which has a longitudinal side (7) and a transverse side (8), and that more preferably the clamping element (10) on the longitudinal side (7) of the wall (3) adjacent battery and / or accumulator cell (6) is arranged.
4. Batteriesystem nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Spannelement (10) zwei keilförmige Elemente (10', 10") mit jeweils einer Grundfläche (12) sowie einer Schrägfläche (13) umfasst, dass vorzugsweise die beiden keilförmigen Elemente (10', 10") an deren Schrägflächen (13) aneinander liegend sowie gegenläufig angeordnet sind, und dass weiter vorzugsweise das eine keilförmige Element (10') mit dessen 4. Battery system according to claim 1, 2 or 3, characterized in that the clamping element (10) comprises two wedge-shaped elements (10 ', 10 "), each with a base (12) and an inclined surface (13), that preferably the two wedge-shaped Elements (10 ', 10 ") are arranged on their inclined surfaces (13) lying next to one another and in opposite directions, and that more preferably the one wedge-shaped element (10') with its
Grundfläche (12) an der Wandung (3) sowie das andere keilförmige Element (10") mit dessen Grundfläche (12) an der zur Wandung (3) benachbarten Batterie- und/oder Akkuzelle (6) anliegt. Base (12) on the wall (3) and the other wedge-shaped element (10 ") with its base (12) rests on the battery and / or accumulator cell (6) adjacent to the wall (3).
5. Batteriesystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die beiden keilförmigen Elemente (10', 10") zueinander fixiert angeordnet sind, insbesondere derart dass der Abstand (d) zwischen der zur Wandung (3) benachbarten Batterie- und/oder Akkuzelle (6) und der Wandung (3) während der Lebensdauer der Batterie- und/oder Akkuzelle (6, 6') im Wesentlichen konstant ist. 5. Battery system according to one of claims 1 to 4, characterized in that the two wedge-shaped elements (10 ', 10 ") are arranged fixed to one another, in particular such that the distance (d) between the battery and adjacent to the wall (3) / or battery cell (6) and the wall (3) is essentially constant during the life of the battery and / or battery cell (6, 6 ').
6. Batteriesystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass wenigstens eine Schraube (15) zur Fixierung der beiden keilförmigen Elemente (10', 10") vorgesehen ist, dass vorzugsweise die Schraube (15) eine Halterung (16) in dem einen keilförmigen Element (10') durchsetzt, und dass weiter vorzugsweise die Schraube (15) mit einer Gewindeaufnahme (17) in dem anderen keilförmigen Element (10") verschraubt ist. 6. Battery system according to one of claims 1 to 5, characterized in that at least one screw (15) for fixing the two wedge-shaped elements (10 ', 10 ") is provided, that preferably the screw (15) has a holder (16) in passes through the one wedge-shaped element (10 '), and that the screw (15) is furthermore preferably screwed to a threaded receptacle (17) in the other wedge-shaped element (10 ").
EP20734698.2A 2019-07-15 2020-06-23 Battery system Pending EP3931902A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019004891.1A DE102019004891A1 (en) 2019-07-15 2019-07-15 Battery system
PCT/EP2020/067490 WO2021008826A1 (en) 2019-07-15 2020-06-23 Battery system

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EP3931902A1 true EP3931902A1 (en) 2022-01-05

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EP (1) EP3931902A1 (en)
CN (1) CN216793823U (en)
DE (1) DE102019004891A1 (en)
WO (1) WO2021008826A1 (en)

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DE102021109347A1 (en) 2021-04-14 2022-10-20 Bayerische Motoren Werke Aktiengesellschaft Battery for a motor vehicle and motor vehicle with a battery
DE102021204222B3 (en) 2021-04-28 2022-11-03 Vitesco Technologies Germany Gmbh Battery for a motor vehicle, method of manufacturing a battery and motor vehicle
US11901574B2 (en) 2021-09-30 2024-02-13 Caterpillar Inc. Apparatus for compressing battery cells in a battery module
DE102022200720A1 (en) 2022-01-24 2023-07-27 Volkswagen Aktiengesellschaft Battery system with pressure device and motor vehicle
DE102022206721A1 (en) 2022-06-30 2024-01-04 Robert Bosch Gesellschaft mit beschränkter Haftung Electrochemical energy storage system, vehicle, method for fixing and positioning a component and pair of wedge bodies

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DE102009007422A1 (en) * 2009-02-04 2010-08-05 Li-Tec Battery Gmbh Battery Cradle
DE102011100623A1 (en) * 2011-05-05 2012-11-08 Daimler Ag Vehicle with a battery
DE102014221944A1 (en) * 2014-10-28 2016-04-28 Robert Bosch Gmbh Clamping device for clamping storage units of an electrical energy storage module and corresponding energy storage module
DE102017119467B4 (en) * 2017-08-25 2020-01-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Battery device for an at least partially electrically operated motor vehicle
DE102018205896A1 (en) * 2018-04-18 2019-10-24 Volkswagen Aktiengesellschaft "Battery module and battery arrangement"

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