DE102013011686A1 - Energy storage device with a device housing - Google Patents

Abstract

Energy storage device (1) for providing electrical energy, comprising at least one cell arrangement (2), which has at least two, substantially parallelepiped, interconnectable, electrochemical energy storage devices (3, 3a), and with a device housing (28) having a housing middle part (29 ) and at least one housing cover (35), wherein the housing middle part (29) is configured to receive the cell assembly at least in sections, wherein the housing cover (35) with the housing middle part (29) is releasably mechanically connectable, and with a sealing device (46), which can be inserted between the housing middle part (29) and the housing cover (35), which has a support element (61) and a sealing element (62), wherein the support element (61) is formed with four frame elements (63, 63a, 63b, 63c) which can be arranged at least in sections around a substantially parallelepiped-shaped cavity (64), which are connectable to each other, wherein the sealing element (62), preferably within the cavity (64), with at least one of the frame members (63, 63 a, 63 b, 63 c) is materially connectable, wherein a predetermined ratio q, defined as the quotient of Modulus of elasticity of the sealing element (62) divided by the Young's modulus of the support element (61) is less than 0.65.

Description

The present invention relates to an energy storage device having a plurality of interconnectable electrochemical energy storage devices, and to a method of manufacturing this energy storage device. The invention is described in the context of energy storage devices with lithium-ion chemistry for supplying electrical consumers. It should be noted that the invention may also be used regardless of the type of energy storage device, regardless of the chemistry of the energy storage device or regardless of the type of consumer supplied.

Energy storage devices with a plurality of rechargeable, electrochemical energy storage devices for supplying electrical consumers are known. Such energy storage devices sometimes have multi-part device housing, wherein between two of these housing parts, a seal may be inserted.

The effort in the production of some well-known energy storage devices is sometimes perceived as problematic.

It is an object of the invention to keep the effort in the manufacture of an energy storage device low.

The object is achieved by an energy storage device according to claim 1. According to a further aspect, this object is also achieved by a manufacturing method according to claim 12. Preferred developments of the invention are the subject of the dependent claims.

According to the invention, the energy storage device serves to provide electrical energy. The energy storage device has at least one cell arrangement. The cell arrangement is formed with at least two, substantially cuboidal, interconnectable, electrochemical energy storage devices.

The energy storage device has a device housing. The device housing is formed with a housing middle part and at least one housing cover. The housing middle part is configured to receive the cell arrangement at least in sections. The housing cover is detachably mechanically connectable to the middle part of the housing.

The energy storage device has a sealing device which can be inserted between the housing middle part and the housing cover. The sealing device has a support element and a sealing element. The support member is formed with three, four or more frame members. The frame elements can be arranged at least in sections around a substantially prismatic or cuboidal cavity. The frame members are connectable to each other, in particular cohesively. The sealing element is, preferably within the cavity, integrally connected to at least one of the frame members.

A predetermined ratio q is defined as the quotient of the elastic modulus of the sealing element divided by the modulus of elasticity of the supporting element. The predetermined ratio q is smaller than 0.65.

In some known energy storage devices, a seal is inserted into a groove, wherein the groove is formed in one of the housing parts, in particular in an end wall of one of the housing parts. The groove serves to support the seal, in particular against a pressure difference between the environment of the energy storage device and the interior of the device housing.

In the inventive design of the energy storage device, in particular the sealing device, the sealing element is integrally connected to a support member. In this case, according to the predetermined ratio q, the modulus of elasticity of the support element is greater than the modulus of elasticity of the sealing element. With this design, the support member for supporting the sealing member is capable, in particular against a pressure difference between the environment of the energy storage device and the interior of the device housing. Thus, can be dispensed with the incorporation of a groove in one of the housing parts and the manufacturing cost can be reduced. This solves the underlying task.

In the context of the invention, an energy storage device is to be understood in particular as a device which serves to provide electrical energy. For this purpose, the energy storage device at least two interconnected, preferably in series, connectable, electrochemical energy storage devices on. Preferably, energy storage device has two device ports of different polarity, which are electrically connectable to the energy storage devices, to which the electrical voltage, preferably the sum voltage, the energy storage devices can be tapped. Preferably, the energy storage device has a data interface, which is provided for connection to a higher-level control device, particularly preferably for exchanging data and / or signals with the higher-level control device.

In the context of the invention, an electrochemical energy storage device is to be understood in particular to mean a device which serves to convert chemical energy into electrical energy. Subsequently, the electrochemical energy storage direction is also called secondary cell. For this purpose, the energy storage device has an electrochemical electrode assembly and at least two current conductors of different polarity. The electrode assembly serves the, in particular reversible, conversion of chemical energy into electrical energy. Preferably, the electrode assembly comprises lithium or lithium ions. The electrode assembly is at least partially, in particular substantially completely, surrounded by an enclosure which can counteract an exchange of substances between the electrode assembly and the environment. The two current conductors are connected to electrodes of different polarity of the electrode assembly electrically conductive, in particular cohesively. The current conductors extend in sections from the enclosure in the environment of the energy storage device. At the current conductors, the voltage of the electrode assembly can be tapped. The electrode assembly is preferably designed as an electrode stack or as an electrode winding or as an electrode flat winding. Preferably, the housing is formed with a composite film and or with at least one housing molding. Particularly preferably, the housing is formed with two housing parts which can be connected to one another. Preferably, the at least one energy storage device is substantially cuboidal or cylindrical.

Within the meaning of the invention, a cell arrangement is to be understood in particular to mean an arrangement which has a plurality of, in particular in series, connectable electrochemical energy storage devices or secondary cells and serves to provide electrical energy. In particular, if the energy storage devices are formed substantially cuboid, then the energy storage devices can be arranged touching each other essentially to a cuboid or stacked into a cell stack. In the present case, the axis along which the cuboid or the cell stack further energy storage devices can be added, called stacking direction. In particular, if the energy storage devices are formed with a substantially cylindrical electrode winding, then in each case three longitudinal axes of these electrode windings can be arranged according to an equilateral triangle. Preferably, the energy storage devices are connected in series within the cell array.

For the purposes of the invention, a device housing is to be understood in particular to mean a device which serves for at least partially accommodating the cell arrangement, which serves to delimit the cell arrangement from the surroundings of the energy storage device, which is preferably used to hold the device connections. The device housing is designed in several parts, at least with a middle part of the housing and with one or two housing covers.

For the purposes of the invention, a middle part of the housing means, in particular, a device which serves to accommodate the cell arrangement, at least in sections, preferably in a substantially complete manner. For this purpose, the housing middle part has a receiving space and at least one housing opening, wherein the receiving space can be accessible through the housing opening. Preferably, the middle part of the housing is formed with a metal, particularly preferably with aluminum or with an aluminum alloy. Preferably, the housing middle part is formed substantially cuboid. Preferably, the housing opening is formed substantially rectangular. The housing middle part is preferably provided for holding the device connections and / or the data interface.

In the context of the invention, a housing cover is to be understood in particular to mean a device which serves for the connection to the housing middle part, which serves for closing the receiving space or the at least one housing opening. Preferably, the housing cover is substantially rectangular or plate-shaped or cuboid. Preferably, the housing cover is formed with a metal, particularly preferably with aluminum or with an aluminum alloy. Preferably, the housing cover has a flat flange for contacting the sealing device.

Preferably, the housing cover is provided for holding the device ports and / or the data interface.

For the purposes of the invention, a sealing device is understood in particular to mean a device which serves to seal the device housing with respect to the surroundings of the energy storage device, which can be inserted between the middle part of the housing and one of these housing covers, which has a support element and a sealing element. The sealing device has an opening which is limited at least in sections by the support element and / or the sealing element, which is preferably delimited by the support element and / or the sealing element.

In the context of the invention, a support element is to be understood as meaning, in particular, an element which serves to support the sealing element, which serves to define a preferably prismatic or cuboidal cavity, which is intended to be inserted between the middle part of the housing and one of these housing covers , which is intended to space the housing middle part of one of these housing cover. For this purpose, the support element has at least three, four or more frame elements. Preferably, an opening of the sealing device is limited by the support element.

In the context of the invention, a frame element is to be understood in particular to mean an element which serves to support the sealing element, which is intended to be connected to two further of these frame elements, in particular a material fit, which is intended to be arranged at least in sections around the cavity , which is intended to be inserted between the middle part of the housing and one of these housing cover, which is preferably provided with at least partially surrounding with three other of these frame members a substantially prismatic or cuboid cavity, which is preferably provided with three further of these frame members a frame to form the substantially prismatic or cuboidal cavity. Preferably, an opening of the sealing device is at least partially limited by the frame member.

In the context of the invention, a frame is to be understood in particular to mean a device which is formed with four, substantially rod-shaped, frame elements and a substantially prismatic or cuboid cavity. The frame members surround the cavity at least in sections. The four frame elements are arranged corresponding to the sides of a rectangle and connected to each other in particular cohesively at the corners of this rectangle. The frame members interconnected in this way bound or overlie the cavity from the environment of the frame. Preferably, an opening of the sealing device is at least partially limited by the frame.

In the context of the invention, a sealing element is to be understood in particular to mean an element which serves to seal the device housing with respect to the surroundings of the energy storage device. Preferably, the sealing element is provided to connect the middle part of the housing frictionally engaged with one of these housing cover. Preferably, the sealing element is provided to be frictionally inserted between the middle part of the housing and one of these housing cover. Preferably, the sealing element is configured to be converted from its undeformed state, particularly preferably elastic, reversibly into its deformed state. Preferably, the sealing element is provided to counteract a passage of a fluid between the middle part of the housing and the housing cover. Preferably, the sealing element extends along a plurality of these frame elements. Preferably, the sealing element extends at least partially around the cavity of the support element. Preferably, the sealing element with the support member is materially connectable, more preferably by means of gluing, vulcanization or molded onto the support member. Preferably, an opening of the sealing device is at least partially limited by the sealing element. Preferably, the opening of the sealing device in the undeformed state of the sealing element is greater than in the deformed state of the sealing element.

For the purposes of the invention, a modulus of elasticity is to be understood as meaning a material-specific characteristic value E [N / mm ² ] which indicates the ratio of the normal stress σ [N / mm ² ] divided by the elastic strain ε [-] E = σ / ε

The normal stress σ is calculated from a normal force F [N] divided by the cross-sectional area A [mm ² ] of a specimen made of this material, σ = F / A wherein the cross-sectional area of the specimen is applied perpendicular to the normal force.

The elastic strain ε is calculated from the change in length Δl [m] of the specimen divided by its initial length l [m] ε = Δl / l

The modulus of elasticity can be determined with the uniaxial tensile or compressive test, wherein a sample formed as a test specimen, comprising the cross-sectional area A perpendicular to the direction of the force F, clamped in a testing machine and then stretched or compressed. The force F exerted by the machine on the sample bar causes the normal stress σ in the sample bar. At the same time the measuring length l of the test bar changes. The strain ε can be calculated from the measured change in length Δl. The relationship between normal stress σ and strain ε can be represented as a stress-strain diagram in a Cartesian coordinate system. The stress-strain curve has, starting from the coordinate origin, a section with constant slope, in which the test piece is elastically deformed. This constant slope corresponds to the elastic modulus.

Details of tension, elongation, modulus of elasticity, sample bar and tensile or compression test, the skilled person on pages 4 to 14 of the book "Technical Mechanics 2", 8th edition, Gross, Hauger, Schnell, Schröder, Springer Verlag , remove. Details of the tensile test will find the expert DIN 50154 . ISO 527 . ISO 14129 . ISO 1798 . ISO 1926 . ISO 37 . ISO 3167 . DIN 53455 , Details on the pressure test will find the expert DIN 18136 . DIN 50106 ,

For the purposes of the invention, the predetermined ratio q is to be understood as meaning the quotient of the modulus of elasticity of the sealing element divided by the modulus of elasticity of the support element. The predetermined ratio q is less than 0.65, preferably less than 0.5 (dural steel), more preferably less than 0.2 (hard PVC - GFKEP, PA12 - GFKEP), more preferably less than 0.1 preferably less than 0.05 (hard PVC-dural), more preferably less than 0.02, more preferably less than 0.01, more preferably less than 0.005 (hard PU), even more preferably less than 0.002, more preferably less as 0.001, more preferably less than 0.0005 (PU - GFKEP), more preferably less than 0.0002 (PU - dural according to EM), more preferably less than 0.0001, more preferably more than 0.00001, more preferably more as 0.00002, more preferably more than 0.00005, more preferably more than 0.0001. The moduli of elasticity of support element and sealing element are to be determined with the same tensile or compressive test, preferably with the uniaxial tensile test.

• • sich entlang einer Gehäuselängsachse erstreckt, und
• • ausgestaltet ist, einen, vorzugsweise im Wesentlichen quaderförmigen, Aufnahmeraum wenigstens abschnittsweise gegenüber der Umgebung des Vorrichtungsgehäuses zu begrenzen, wobei der Aufnahmeraum die Zellanordnung wenigstens abschnittsweise aufnehmen kann, und
• • wenigstens eine, vorzugsweise im Wesentlichen rechteckige, Gehäuseöffnung aufweist, welche im Wesentlichen senkrecht zu der Gehäuselängsachse angeordnet ist, welche sich im Wesentlichen senkrecht zu der Gehäuselängsachse öffnet, wobei der Aufnahmeraum durch die Gehäuseöffnung zugänglich ist, wobei die Gehäuseöffnung mit dem Gehäusedeckel verschließbar ist, und
• • wenigstens eine erste Stirnwandung aufweist, welche im Wesentlichen senkrecht zu der Gehäuselängsachse angeordnet ist, welche zur Berührung der Dichteinrichtung, vorzugsweise einer der ersten Mantelflächen, vorzugsweise zur reibschlüssigen Verbindung mit der Dichteinrichtung, vorgesehen ist, und
• • wenigstens eine Gehäuseinnenwandung aufweist, welche dem Aufnahmeraum zugewandt ist, welche an die erste Stirnwandung grenzt.

According to a preferred embodiment, the, preferably substantially cuboid, middle part of the housing has a housing shell, wherein the housing shell

• • extends along a housing longitudinal axis, and
• • Is designed to limit a, preferably substantially cuboid, receiving space at least in sections relative to the environment of the device housing, wherein the receiving space can accommodate the cell assembly at least in sections, and
• Has at least one, preferably substantially rectangular, housing opening, which is arranged substantially perpendicular to the housing longitudinal axis, which opens substantially perpendicular to the housing longitudinal axis, wherein the receiving space is accessible through the housing opening, wherein the housing opening is closable with the housing cover, and
• • Has at least one first end wall, which is arranged substantially perpendicular to the housing longitudinal axis, which is provided for contacting the sealing device, preferably one of the first lateral surfaces, preferably for frictional connection with the sealing device, and
• • Has at least one housing inner wall, which faces the receiving space, which adjoins the first end wall.

Preferably, the Gehäuseinnenwandung serves the boundary of the receiving space. Preferably, the receiving space is limited by the housing inner wall.

Preferably, the first end wall of the at least partially limiting the housing opening is used. Particularly preferably, the first end wall surrounds the housing opening. Preferably, the end wall is arranged substantially perpendicular to the housing longitudinal axis.

Preferably, the first end wall is machined or produced by a machining process. Particularly preferably, the first end wall is ground. This preferred embodiment offers the particular advantage that the sealing of the device housing is improved.

Preferably, the first end wall is provided for frictional connection with the sealing element. Particularly preferably, the first end wall is provided for frictional connection both with the support element and with the sealing element. This preferred embodiment offers the particular advantage that the sealing of the device housing is improved.

Preferably, the housing shell is formed with a metal, particularly preferably with aluminum or an aluminum alloy. This preferred embodiment offers the particular advantage that the electromagnetic shielding of the cell assembly is improved.

Preferably, the housing shell is cut to length from a, particularly preferably metallic, extruded profile. This preferred embodiment offers the particular advantage that material can be saved during production. This preferred embodiment offers the particular advantage that the size of the receiving space, in particular at short notice during manufacture of the energy storage device, can be adapted to the dimensions of the cell arrangement. This preferred embodiment offers the particular advantage that a possible dead volume in the receiving space can be reduced or avoided. In particular, this preferred embodiment offers the advantage that the housing shell can be prepared in a time-independent manner before the cell assembly is assembled.

This preferred development offers the particular advantage that the production cost is reduced.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, at least one or more of these frame elements each have two first lateral surfaces, wherein the two lateral surfaces are arranged substantially parallel to one another and spaced from each other by a first wall thickness, the thickness of the sealing element, to be measured substantially parallel to the first wall thickness, in its undeformed state is greater than the first wall thickness.

Preferably, the thickness of the sealing element and the first wall thickness along the housing longitudinal axis are to be measured.

Preferably, one of the first lateral surfaces for, in particular frictional, contact or connection with one of the first end walls is provided and a further of these first lateral surfaces is provided for, in particular frictional, contact or connection with one of these housing cover.

The sealing element is configured to be reversibly transferred from its undeformed state to its deformed state. In the undeformed state, the sealing element is thicker than one or more, preferably all, of these frame elements. In the deformed state, the thickness of the sealing element is reduced compared to the original thickness. Preferably, the thickness of the sealing element in the deformed state substantially corresponds to the first wall thickness.

This preferred development offers the particular advantage that the sealing of the device housing is improved, in particular by the elastic deformation of the sealing element causes a restoring force, in particular along the housing longitudinal axis. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element does not need to be formed equal to the first wall thickness in the production of the sealing device. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element in the manufacture of the sealing device can be tolerated coarser.

According to a further preferred development, which can be advantageously combined with one of the aforementioned developments, the sealing element is provided to assume a deformed state, preferably when it is inserted between the middle part of the housing and one of these housing covers, wherein preferably the thickness of the sealing element, particularly preferably measured in Direction of the housing longitudinal axis, in the deformed state substantially corresponds to the first wall thickness of the support element.

The sealing element is configured to be reversibly transferred from its undeformed state to its deformed state. In the undeformed state, the sealing element is thicker than one or more, preferably all, of these frame elements. In the deformed state, the thickness of the sealing element is reduced compared to the original thickness.

Preferably, the sealing element is only elastically deformed in the deformed state. The elastic deformation may be accompanied by a restoring force substantially in the direction of the housing longitudinal axis.

This preferred development offers the particular advantage that the sealing of the device housing is improved, in particular by the deformation of the sealing element causes a restoring force, in particular along the housing longitudinal axis. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element does not need to be formed equal to the first wall thickness in the production of the sealing device. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element in the manufacture of the sealing device can be tolerated coarser.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, the sealing device has a, preferably substantially rectangular, opening which is delimited by the sealing element and / or the supporting element, wherein this opening is at least in the undeformed state of the sealing element is as large as the housing opening, wherein preferably the sealing element protrudes in the deformed state at least in sections beyond the housing inner wall and in the direction of the housing longitudinal axis or in the direction of the receiving space.

This opening of the sealing device is intended to be arranged in a plane perpendicular to the housing longitudinal axis. Preferably, the geometry of the opening is adapted to the housing opening. The, in particular substantially plate-shaped, support element is provided to be arranged in a plane perpendicular to the housing longitudinal axis.

In this development, the housing opening is not reduced by the sealing device, so that this housing opening is substantially completely available for insertion of the cell assembly in the receiving space available.

If the housing opening is formed substantially rectangular, then the opening of the sealing device is also formed substantially rectangular and then the length and width of the substantially rectangular opening of the sealing device are each at least as large as the length and width of the housing opening. Preferably, the opening of the sealing device in the undeformed state of the sealing element is greater than in the deformed state of the sealing element.

Preferably, the sealing element is only elastically deformed in the deformed state. The elastic deformation may be accompanied by a restoring force substantially in the direction of the housing longitudinal axis.

This preferred development offers the particular advantage that the insertion of the cell assembly through the housing opening into the receiving space or the middle part of the housing is simplified. This preferred development offers the particular advantage that the sealing of the device housing is improved, in particular by the deformation of the sealing element causes a restoring force, in particular substantially parallel to the housing longitudinal axis. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element does not need to be formed equal to the first wall thickness in the production of the sealing device. This preferred development offers the particular advantage that the production cost is reduced, in particular by the thickness of the sealing element in the manufacture of the sealing device can be tolerated coarser. This preferred development offers the particular advantage that the correct seat of the sealing device, in particular by visual inspection, can be checked more easily, in particular if the sealing element in the deformed state at least partially protrudes beyond the housing inner wall and in the direction of the housing longitudinal axis or in the receiving space. This preferred development offers the particular advantage that the correctly performed installation of the energy storage device, in particular by visual inspection, can be checked more easily, in particular if the sealing element protrudes in the deformed state at least in sections beyond the housing inner wall and in the direction of the housing longitudinal axis or into the receiving space. This preferred development offers the particular advantage that the correct closing of the device housing during assembly of the energy storage device, in particular by visual inspection, can be checked more easily, in particular if the sealing element in the deformed state at least partially beyond the housing inner wall and in the direction of the housing longitudinal axis or in the receiving space protrudes.

According to a further preferred development, which can be advantageously combined with one of the aforementioned refinements, the sealing device is inserted between the housing cover and the housing middle part, wherein the housing cover is clamped in the direction of the housing middle part, wherein the sealing element is converted into its deformed state, preferably the Sealing element in the deformed state protrudes at least in sections beyond the housing inner wall and in the direction of the housing longitudinal axis or in the direction of the receiving space.

The, in particular substantially plate-shaped, support element is provided to be arranged in a plane perpendicular to the housing longitudinal axis. The, in particular substantially plate-shaped, support element is provided to be arranged substantially parallel to the first end wall.

In this preferred embodiment, the sealing device is frictionally held between the housing cover and the middle part of the housing. The sealing element is elastically deformed and a restoring force substantially parallel to the housing longitudinal axis urges two opposite lateral surfaces of the sealing element, which are arranged substantially perpendicular to the housing longitudinal axis, on the one hand against the housing cover and on the other hand against the housing middle part. The restoring force from the elastic deformation of the sealing element allows coarser tolerancing of the housing cover and the middle part of the housing.

Preferably, the sealing device, in particular its support element, connected to the housing cover and / or the middle part of the material cohesively, particularly preferably glued.

This preferred development offers the particular advantage that the sealing of the device housing is improved. This preferred development offers the particular advantage that the production cost is reduced by the restoring force from the elastic deformation of the sealing element allows a coarser tolerance of the housing cover and the middle part of the housing. This preferred development offers the particular advantage that the correct seat of the sealing device, in particular by visual inspection, can be checked more easily, in particular if the sealing element in the deformed state at least partially protrudes beyond the housing inner wall and in the direction of the housing longitudinal axis or into the receiving space. This preferred development offers the particular advantage that the correctly performed installation of the energy storage device, in particular by visual inspection, can be checked more easily, in particular if the sealing element protrudes in the deformed state at least in sections beyond the housing inner wall and in the direction of the housing longitudinal axis or into the receiving space. This preferred development offers the particular advantage that the correct closing of the device housing during assembly of the energy storage device, in particular by visual inspection, can be checked more easily, in particular if the sealing element in the deformed state at least partially beyond the housing inner wall and in the direction of the housing longitudinal axis or in the receiving space protrudes.

According to a further preferred development, which can be advantageously combined with one of the aforementioned refinements, the sealing element is formed with an elastomer or plastomer. In this preferred development, the support element is formed with a metal and / or with a, in particular fiber-reinforced, polymer.

Preferably, the elastomer is selected from the group consisting of polyurethane, flexible PVC, rubber, rubber, styrene-butadiene-acrylonitrile copolymers, butadiene copolymers, polyesters, polybutylene terephthalate, styrene copolymers, polytetrafluoroethylene. Preferably, the elastomer has a modulus of elasticity between 1 and 1500 N / mm ² .

Preferably, the plastomer is selected from the group consisting of polypropylene, polyethylene, polystyrene, polyamide, rigid PVC, polycarbonate. Preferably, the plastomer has a modulus of elasticity between 200 and 5,000 N / mm ² .

Preferably, the, in particular fiber-reinforced, polymer is formed as a plastomer or duromer. Preferably, the polymer is selected from the group consisting of phenolic resins, aminoplasts, unsaturated polyester resins, in particular with styrene, epoxy resins, polyimides. Preferably, the polymer has a modulus of elasticity between 5,000 and 30,000 N / mm ² .

• • Stahl, Aluminium, Kupfer, Magnesium, Zink, Zinn,
• • Legierungen mit Aluminium, Kupfer, Magnesium, Zink und/oder Zinn,
• • Duraluminium, Messing, Bronze.

Preferably, the metal is selected from the following group, which includes:

• • steel, aluminum, copper, magnesium, zinc, tin,
• Alloys with aluminum, copper, magnesium, zinc and / or tin,
• • Duralumin, brass, bronze.

Preferably, the metal has a modulus of elasticity between 60,000 and 220,000 N / mm ² .

Preferably, the materials of the sealing element and the support element are combined according to one of the lines of the following table: sealing element support element polyurethane fiber-reinforced unsaturated polyester resin or epoxy resin Low-pressure polyethylene fiber-reinforced unsaturated polyester resin or epoxy resin High density polyethylene fiber-reinforced unsaturated polyester resin or epoxy resin Soft PVC fiber-reinforced unsaturated polyester resin or epoxy resin

This preferred development offers the particular advantage that the sealing element can be supported by the support element improved. This preferred development offers the particular advantage that the assembly of the sealing device is simplified. This preferred development offers the particular advantage that the middle part of the housing and the housing cover can each be produced without a groove for the sealing device. This preferred development offers the particular advantage that the middle part of the housing and the housing cover tolerated coarser and / or can be produced with less effort.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, the support element, preferably at least one or more of these frame elements, is formed with a metal insert. Preferably, the metal insert serves to shield electromagnetic radiation. Preferably, the metal insert serves the improved compressive strength of the support element.

The metal insert preferably extends through the frame element, particularly preferably along the longitudinal axis of the frame element. Preferably, the metal insert extends along a plurality of these frame elements, particularly preferably around the cavity of the support element or the housing opening. Preferably, the frame element is formed with a, particularly preferably fiber-reinforced, polymer material, which particularly preferably surrounds the metal insert at least in sections.

Preferably, the metal insert at least partially on an I-shaped, L-shaped, T-shaped or U-shaped cross-sectional area.

This preferred development offers the particular advantage that the passage of electromagnetic radiation through the sealing device or the support element is reduced. This preferred development offers the particular advantage that the compressive strength of the sealing device or of the support element is improved.

According to a further preferred embodiment, which can be advantageously combined with one of the aforementioned developments, the support element, preferably at least one or more of these frame elements, at least one or more recesses, which are configured to receive an independent mechanical connection means and / or a positioning means, wherein preferably the recess is arranged in a corner region of the support element.

Preferably, several, more preferably each, of the corners of the substantially rectangular support member each have one of these recesses. Preferably, the recess is formed substantially circular, particularly preferably as a through hole, more preferably arranged substantially perpendicular to the longitudinal axis.

This preferred development offers the particular advantage that the positioning of the sealing device when inserting between the middle part of the housing and one of these housing cover or when mounting the device housing is simplified. This preferred development offers the particular advantage that an undesired relative movement of the sealing device or of the support element with respect to the housing middle part, in particular during operation of the energy storage device, is encountered.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, the housing middle part, the housing cover and / or the sealing device has at least one first positioning element, which is configured for undesired relative movement of the sealing device relative to the housing middle part and / or opposite to the housing Counteract housing cover, wherein preferably the first positioning is formed as a recess or as a projection.

Preferably, the first positioning element is designed as an annular collar or as a pin on the housing cover or on the housing middle part. Preferably, the first positioning element is used for engagement in one of these recesses of the support element.

Alternatively, the first positioning element is designed as an annular collar or as a pin on the support element. The first positioning element of the support element is designed to engage in a corresponding recess or depression in the housing middle part and / or in the housing cover. This first positioning element preferably extends from one of the first lateral surfaces.

This preferred development offers the particular advantage that the positioning of the sealing device when inserting between the middle part of the housing and one of these housing cover or when mounting the device housing is simplified. This preferred development offers the particular advantage that an undesired relative movement of the sealing device or of the support element with respect to the housing middle part, in particular during operation of the energy storage device, is encountered.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, at least one cross-sectional area of the sealing device, preferably of the sealing element, is substantially rectangular or has two edge lines arranged substantially at right angles to one another or has an edge line curved at least in sections.

Preferably, the sealing element extends from a lateral surface of the support element, wherein the lateral surface faces the cavity. The sealing element preferably has, at least in sections, a substantially rectangular cross-sectional area. Alternatively, the sealing element has, at least in sections, a substantially circular cross-sectional area. Alternatively, the sealing element has, at least in sections, a cross-sectional area designed in accordance with a circular section, preferably with a straight section, the straight section facing the lateral surface of the support element facing the cavity.

Preferably, the sealing element is formed in two parts, wherein each part of the sealing element is connectable to a lateral surface of the support element, wherein preferably the support element between these two parts of the sealing element is arranged, wherein preferably the support member for the two parts of the sealing element spaced. Preferably, at least a portion of the sealing element at least in sections on a correspondingly designed a circular section cross-sectional area, preferably with a straight portion, wherein the straight portion for connecting the lateral surface of the support member which faces the cavity, is provided.

This preferred development offers the particular advantage that the sealing element, in particular its geometry, to a provided for contacting the sealing element lateral surface of the housing middle part and / or one of these housing cover, in particular for improved sealing, in particular for reduced material use, in particular for reduced manufacturing costs are adjusted can.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, at least one of the frame elements has a projection at least in sections, the projection extending into the cavity, the sealing element preferably having a recess for receiving the projection.

Preferably, the sealing element is at least partially cohesively connectable to the projection. Preferably, the projection extends from at least one lateral surface of the support element, which faces the cavity. Preferably, the projection extends along a plurality of lateral surfaces of the support element, which respectively face the cavity.

Preferably, the projection is at least partially formed as a rib. Preferably, the rib can be received at least in sections from the recess of the sealing element.

This preferred development offers the particular advantage that the positioning of the sealing element during manufacture of the sealing device is simplified. This preferred development offers the particular advantage that the support of the sealing element, in particular during assembly of the device housing, in particular during operation of the energy storage device is improved.

According to a further preferred development, which can advantageously be combined with one of the aforementioned refinements, the sealing element is colored at least in sections, preferably in a color contrasting with the color of the middle part and / or the color of one of these housing covers, preferably with proportions of white, green, red or yellow, particularly preferably white, green, red or yellow. Preferably, at least the portion of the sealing element, which protrudes in the deformed state of the sealing element in the cavity of the support member or in the receiving space, colored.

This preferred development offers the particular advantage that the sealing element, when it protrudes into the cavity of the support member or in the receiving space, especially in the deformed state, relative to the housing middle part and / or one of these housing cover is easier to see. This preferred development offers the particular advantage that the correct mounting of the device housing or the energy storage device can be checked more easily.

• S1 Bereitstellen eines dieser Gehäusemittelteile, eines dieser Gehäusedeckel und einer der Dichteinrichtungen,
• S2 Einfügen der Dichteinrichtung zwischen das Gehäusemittelteil und den Gehäusedeckel,
• S3 Verspannen von Gehäusemittelteil und Gehäusedeckel, vorzugsweise mit einem unabhängigen mechanischen Verbindungsmittel, wobei das Dichtelement aus seinem unverformten Zustand, insbesondere umkehrbar, in seinen verformten Zustand überführt wird, worauf eine dieser ersten Mantelflächen des Stützelements der Dichteinrichtung die Stirnwandung und eine weitere dieser ersten Mantelflächen den Gehäusedeckel berührt, sodass vorzugsweise das Stützelement das Gehäusemittelteil und den Gehäusedeckel beabstandet,

vorzugsweise mit

• S4 Einsetzen der Zellanordnungen den Aufnahmeraum, vorzugsweise vor Schritt S3.

In accordance with a second aspect of the invention, an energy storage device, in particular the energy storage device according to the invention or designed according to one of the preceding developments, is produced by a process comprising the steps:

• S1 providing one of these housing middle parts, one of these housing covers and one of the sealing devices,
• S2 insertion of the sealing device between the middle part of the housing and the housing cover,
• S3 bracing of the housing middle part and the housing cover, preferably with an independent mechanical connection means, wherein the sealing element is transferred from its undeformed state, in particular reversible, into its deformed state, whereupon one of these first lateral surfaces of the support element of the sealing device the end wall and a further of these first lateral surfaces Housing cover touched, so preferably the support member spaced the middle part of the housing and the housing cover,

preferably with

• S4 inserting the cell assemblies the receiving space, preferably before step S3.

With step S3, one of the housing openings of the middle part of the housing is closed.

Preferably, the housing middle part before step S1 of a continuous casting profile, in particular with aluminum and an aluminum alloy formed, cut to length, particularly preferably substantially corresponding to a dimension, in particular the length of the cell assembly.

Preferably, the cell assembly is electrically connected to device terminals of the energy storage device prior to step S3.

When forming the energy storage device, in particular the sealing device, according to this manufacturing method, the sealing element is integrally connected to a support element. In this case, according to the predetermined ratio q, the modulus of elasticity of the support element is greater than the modulus of elasticity of the sealing element. With this design, the support member for supporting the sealing member is capable, in particular against a pressure difference between the environment of the energy storage device and the interior of the device housing. Thus, can be dispensed with the incorporation of a groove in one of the housing parts and the manufacturing cost can be reduced. This solves the underlying task.

• S5 Anfertigen des Stützelements mit wenigstens eine, zwei, vier oder mehreren dieser Rahmenelemente, mit Anordnen der Rahmenelemente um den Hohlraum, mit Verbinden der Rahmenelemente untereinander, vorzugsweise zur Ausbildung des Stützelements als Rahmen um den Hohlraum, wobei vorzugsweise wenigstens eines der Rahmenelemente diesen Vorsprung aufweist, wobei besonders bevorzugt der Vorsprung sich als Rippe entlang einer der Mantelflächen des Rahmenelements in den Hohlraum erstreckt,
• S6 stoffschlüssiges Verbinden des Dichtelements mit einer der Mantelflächen des Stützelements, vorzugsweise mit Mantelflächen mehrerer dieser Rahmenelemente, wobei vorzugsweise das Dichtelement mit einer Ausnehmung zur Aufnahme des Vorsprungs ausgebildet ist, besonders bevorzugt unter Aufnehmen des Vorsprungs in der Ausnehmung.

According to a third aspect of the invention, one of these sealing devices is produced with the steps:

• S5 making the support element with at least one, two, four or more of these frame members, with arranging the frame members around the cavity, with connecting the frame members together, preferably for forming the support member as a frame around the cavity, preferably at least one of the frame members having this projection , wherein particularly preferably the projection extends as a rib along one of the lateral surfaces of the frame element into the cavity,
• S6 materially connecting the sealing element with one of the lateral surfaces of the support element, preferably with lateral surfaces of a plurality of these frame elements, wherein preferably the sealing element is formed with a recess for receiving the projection, particularly preferably by receiving the projection in the recess.

Preferably, after step S5, the support element has at least four of these frame elements, which are connected to one another to form a substantially rectangular frame, wherein the frame surrounds the cavity at least in sections.

Preferably, the support element is formed after step S5 with a metal. Alternatively, the support element is formed after step S5 with a polymer material and preferably has one of these metal insert, wherein particularly preferably the polymer material surrounds the metal insert at least in sections.

Preferably, at least one to four of these frame members after step S5 each have a projection, wherein the projection extends from a lateral surface of the frame member into the cavity, wherein the lateral surface of the frame member facing the cavity. The projection serves to support the sealing element.

Preferably, at least one to four of these frame elements after step S5 at least in sections, a substantially rectangular cross-sectional area. Particularly preferably, one to four of these frame elements after step S5 at least in sections a cross-sectional area with two substantially rectangular, different sized sections, wherein the larger portion or in the direction of the housing longitudinal axis wider portion of the spacing of housing middle part and housing cover is used and the smaller portion forms the projection. Preferably, one of these metal inserts extends at least through the larger portion.

Alternatively, at least one to four of these frame elements after step S5 at least in sections a cross-sectional area with three substantially rectangular, different sized sections. Two of these sections (spacer sections), which are wider in the direction of the housing longitudinal axis than the third section, serve to space the housing middle part and the housing cover. The third section spaces the first section from the second section. The third section is designed for connection to the preferably two-part sealing element. Preferably, one of these metal inserts extends through at least one of these spacer sections. Alternatively, one of these metal inserts extends through the third section.

• • Stanzen bzw. Schneiden des Stützelements aus einem Metallblech oder einer, vorzugsweise fasergefüllten, Polymerplatte, und/oder
• • Umformen eines Metallblechs zum Metalleinleger oder zum Stützelement, und/oder
• • mit Spritzgießen eines der Rahmenelemente, und/oder
• • Umspritzen des Metalleinlegers mit einem Polymermaterial zu einem dieser Rahmenelemente.

Preferably, step S5 takes place with

• Punching or cutting the support element from a metal sheet or a, preferably fiber-filled, polymer plate, and / or
• Forming a metal sheet to metal insert or support element, and / or
• With injection molding of one of the frame elements, and / or
• • Overmolding the metal insert with a polymer material to one of these frame elements.

At least one to four of these frame elements preferably have, after step S5, at least one essentially flat lateral surface which serves for the connection with the sealing element.

Preferably, the sealing element is formed after step S6 with a plurality of contiguous sections, which each serve to connect to one of the lateral surfaces of the frame members.

Preferably, after step S6, at least one cross-sectional area of the sealing element is substantially rectangular or has two edge lines arranged substantially at right angles to each other or has an edge line curved at least in sections.

Preferably, after step S6, the sealing element extends from a lateral surface of the support element, wherein the lateral surface faces the cavity. The sealing element preferably follows Step S6 at least in sections, a substantially rectangular cross-sectional area. Alternatively, after step S6, the sealing element has, at least in sections, a substantially circular cross-sectional area. Alternatively, after step S6, the sealing element has, at least in sections, a cross-sectional area designed in accordance with a circular section, preferably with a straight section, the straight section being provided for connecting the lateral surface of the support element, which faces the cavity.

Preferably, the sealing element is formed in two parts after step S6, wherein each part of the sealing element is connectable to a lateral surface of the support element, wherein preferably the support element between these two parts of the sealing element is arranged, wherein preferably the support member for the two parts of the sealing element spaced. Preferably, after step S6, at least a portion of the sealing element at least in sections has a correspondingly designed a circular section cross-sectional area, preferably with a straight portion, wherein the straight portion for connecting the lateral surface of the support element, which faces the cavity, is provided.

• • Stanzen bzw. Schneiden des Dichtelements aus einem Metallblech oder einer, vorzugsweise fasergefüllten, Polymerplatte, und/oder
• • Extrudieren eines Polymerwerkstoffs, und/oder
• • Vernetzen eines, besonders bevorzugt extrudierten, Polymerwerkstoffs, und/oder
• • stoffschlüssiges Verbinden des Dichtelements mit dem Stützelement, besonders bevorzugt mittels Anspritzen an wenigstens eine Mantelfläche des Stützelements, Kleben an wenigstens eine Mantelfläche des Stützelements, Vulkanisieren an wenigstens eine Mantelfläche des Stützelements, und/oder
• • Auftragen eines Polymermaterials auf wenigstens eine Mantelfläche des Stützelements, besonders bevorzugt als Raupe entlang der wenigstens einen Mantelfläche.

Preferably, step S6 takes place with

• Punching or cutting the sealing element from a metal sheet or a, preferably fiber-filled, polymer plate, and / or
• Extruding a polymeric material, and / or
• Crosslinking of a, particularly preferably extruded, polymer material, and / or
• Cohesive bonding of the sealing element to the support element, more preferably by means of injection molding on at least one lateral surface of the support element, bonding to at least one lateral surface of the support element, vulcanizing at least one lateral surface of the support element, and / or
• Applying a polymer material on at least one lateral surface of the support element, particularly preferably as a bead along the at least one lateral surface.

When forming the energy storage device, in particular the sealing device, according to this manufacturing method, the sealing element is integrally connected to a support element. In this case, according to the predetermined ratio q, the modulus of elasticity of the support element is greater than the modulus of elasticity of the sealing element. With this design, the support member for supporting the sealing member is capable, in particular against a pressure difference between the environment of the energy storage device and the interior of the device housing. Thus, can be dispensed with the incorporation of a groove in one of the housing parts and the manufacturing cost can be reduced. This solves the underlying task.

Further advantages, features and applications of the present invention will become apparent from the following description taken in conjunction with the figures. It shows:

1 a known energy storage device with an O-ring seal,

2 the energy storage device according to 1 in exploded view,

3 Parts of the energy storage device according to 1 .

4 a section through parts of the energy storage device according to the 1 to 4 .

5 partly schematically an energy storage device according to the invention,

6 partially schematically a preferred embodiment of the energy storage device,

7 partially schematically one of the housing cover and a sealing device of the energy storage device according to 6 .

8th partly schematically a section through a device housing of a preferred embodiment of the energy storage device, before and after step S3,

9 partly schematically a housing cover and a sealing device according to a further preferred development of the energy storage device with positioning element,

10 partially schematically a section 9 .

11 partly schematically sections through various sealing devices.

1 shows a known energy storage device with an O-ring seal. The housing of the energy storage device is closed. The O-ring seal is inserted and not visible.

2 shows the energy storage device according to 1 in exploded view. The housing has two covers. The rear cover is not screwed yet. The rear cover has a circumferential groove for receiving the O-ring seal also shown.

3 shows parts of the energy storage device according to 1 , Shown are the rear cover with a circumferential groove for the O-ring seal and the O-ring seal.

4 shows a section through parts of the energy storage device according to 1 to 3 , On average, the groove in the lid for receiving the O-ring seal can be seen. In the upper part of the figure, the O-ring seal is not yet inserted in the intended groove. In the lower part after placing the cover, the O-ring seal is inserted and deformed in the intended groove.

5 shows partially schematically an energy storage device according to the invention 1 , The device housing 28 has a middle part of the housing 29 and a housing cover 35 on. The housing cover 35 is with the middle part of the housing 29 releasably mechanically connected. The middle part of the housing 29 is formed essentially cuboid. In the non-accessible recording room of the middle part 29 is a cell arrangement 2 arranged. Between the middle part of the housing 29 and the housing cover 35 is a sealing device inserted, which is not visible. The housing cover 35 is essentially cuboid or plate-shaped and rectangular.

Preferably, the middle part of the housing is cut to length from a continuous casting profile essentially corresponding to one of the dimensions, in particular the length, of the cell arrangement. Preferably, the housing middle part is formed with aluminum or an aluminum alloy. Preferably, the receiving space is formed substantially cuboid.

6 shows partially schematically a preferred embodiment of the energy storage device 1 , The device housing 28 corresponds essentially to the device housing according to 5 , The device housing 28 has a second of these housing cover 35a and a second of these sealing devices 46a on. The second housing cover 35a and the second sealing means 46a are provided with an independent mechanical connection means 50 with the middle part of the housing 29 to be detachably connected.

The housing cover 35 holds the data interface 40 as well as the device connections 39 , Alternatively, the data interface could 40 as well as the device connections 39 from the middle part of the housing 29 be held.

Shown is the state of the energy storage device 1 during production before step S3.

7 partially shows schematically a housing cover 35 and a sealing device 46 the energy storage device according to 6 ,

The housing cover 35 is formed substantially cuboid or plate-shaped. The corners of the housing cover 35 have recesses for receiving an independent mechanical connection means. Preferably, the housing cover 35 formed with aluminum or an aluminum alloy. The housing cover 35 has a flat flange for contact, preferably for frictional connection with, the sealing device 46 on.

The sealing device 46 has this support element 61 and the sealing element 62 on. The modulus of elasticity of the support element 61 is significantly greater than the modulus of elasticity of the sealing element 62 , The support element 61 surrounds the particular prismatic cavity 64 sections.

The support element 61 has four of these frame elements 63 . 63a . 63b . 63c on. The frame elements 63 . 63a . 63b . 63c are substantially frame-shaped and partially around the cavity 64 arranged. Opposite ends of the frame element 63 are each with ends of frame elements 63a and 63c connected. Opposite ends of the frame element 63a are each with ends of the frame elements 63 and 63b connected. Opposite ends of the frame element 63b are each with ends of the frame elements 63a and 63c connected. Opposite ends of the frame element 63c are each with ends of the frame elements 63 and 63b connected. Corners of the frame or the frame-shaped support element 61 have recesses 67 for receiving each of an independent mechanical connection means. The frame elements 63 . 63a . 63b . 63c each have a substantially rectangular cross-sectional area. The support element 61 has a first wall thickness, which is preferably between 5 and 1 mm, more preferably between 4 and 2 mm.

Preferably, the support element 61 formed with a metal. Alternatively, the support element 61 formed with a, preferably fiber-reinforced, polymer material, more preferably with at least one of these metal insert.

The sealing element 62 is with lateral surfaces of the frame elements 63 . 63a . 63b . 63c cohesively connected, these lateral surfaces of the cavity 64 are facing. The sealing element 62 extends from these lateral surfaces in the cavity 64 , The sealing element 62 is formed with a polymer material, preferably with an elastomer. The sealing element 62 is thicker in its undeformed state than the first wall thickness of the support element 61 so that the sealing element 62 in its undeformed state, a touch of the support element 61 with the flat flange of the housing cover 35 can prevent. In its deformed state, not shown, the sealing element 62 as well as the support element 61 the flat flange of the housing cover 35 touch.

In this embodiment of the sealing device 46 is the value of the quotient of the elastic modulus of the sealing element 62 divided by the modulus of elasticity of the support element 61 less than 0.65. With this training is the support element 61 for supporting the sealing element 62 able, in particular against a pressure difference between the environment of the energy storage device 1 and the interior of the device housing 28 , Thus, can be dispensed with the incorporation of a groove in one of the housing parts and the manufacturing cost can be reduced.

8th shows partially schematically a section through a device housing 28 a preferred embodiment of the energy storage device 1 , in the upper part of the figure before step S3 and in the lower part of the figure after step S3. Shown are one of these housing cover 35 , one of these sealing devices 46 as well as one of these middle parts of the housing 29 , Here are the housing cover 35 and the sealing device 46 essentially in accordance with the comments on 7 educated. Not shown is the cell assembly, which from the receiving space 30 at least partially can be included.

The middle part of the housing 29 has an end wall 33 on which of the sealing device 46 or the housing cover 35 is facing. Preferably, the housing middle part 29 formed with aluminum or with an aluminum alloy. Preferably, the housing middle part 29 formed substantially parallelepiped and cut from a continuous casting profile, substantially corresponding to the length of the cell assembly, not shown.

In the upper part of the 8th is the state of the device body 28 before performing step S3. The sealing element 62 has its undeformed state. The opening of the sealing device 46 is through the sealing element 62 limited. This opening of the sealing device 46 is at least as large, in this case as large as the housing opening 31 , The substantially plate-shaped support element 61 is arranged in a plane which is aligned substantially perpendicular to the housing longitudinal axis.

In the lower part of the 8th is the state of the device body 28 after performing step S3. The sealing element 62 has its deformed state. The sealing element 62 is now as thick as the first wall thickness of the support element 61 , The sealing element 62 and the support element 61 lie both on the flat flange of the housing cover 35 as well as on the front wall 33 of the middle part of the housing 29 at. The sealing element 62 protrudes at least in sections over the housing inner wall 34 out in the direction of the recording room 30 or the housing longitudinal axis. In particular, due to the different moduli of elasticity, makes the support element 61 the essential contribution to the complaint of the housing cover 35 from the middle part of the housing 29 , The much softer sealing element 62 makes in its deformed state, in particular due to an elastic restoring force, the essential contribution to the sealing of the device housing 28 , The sealing element 62 extends at least partially into the receiving space or the cavity 64 of the support element 61 ,

With this training is the support element 61 for supporting the sealing element 62 able, in particular against a pressure difference between the environment of the energy storage device 1 and the interior of the device housing 28 , Thus, can be dispensed with the incorporation of a groove in one of the housing parts and the manufacturing cost can be reduced.

With this training, the correct fit of the sealing device 46 be checked after step S3 easier.

9 partially shows schematically a housing cover 35 and a sealing device 46 According to a further preferred embodiment of the energy storage device 1 with first positioning elements 68 , The sealing device 46 corresponds substantially to the sealing device according to the 7 and 8th ,

From the housing cover the 7 gives way to the illustrated housing cover 35 by first positioning elements 68 which in each case as an annular collar, arranged around the recesses in the corners of the housing cover 35 , from the flat flange of the housing cover 35 extend. The first positioning elements 68 are provided by the recesses 67 of the support element 61 to be included.

The formation of the housing cover 35 with these first positioning elements 68 offers in particular the advantage that the assembly of the energy storage device or the closing of the device housing is simplified. The formation of the housing cover 35 with these first positioning elements 68 offers in particular the advantage that an undesirable relative movement of the sealing device 46 opposite the housing cover 35 and / or housing middle part 29 can be countered.

10 partially shows schematically a section 9 , The collar-shaped first positioning element 68 and the recesses configured to receive this positioning element 67 are easy to recognize due to the magnification.

11 shows partially schematically sections through various sealing devices 46 ,

The support element 61 or its frame element 63 has a substantially rectangular cross-sectional area. With the lateral surface of the frame element 63 which is the cavity 64 facing, the sealing element 62 or the sealing element 62a be connected cohesively.

According to 11a has the sealing element 62 a cross-sectional area which substantially corresponds to a circle section and has a straight boundary line. The straight boundary line shows a substantially rectangular lateral surface of the sealing element 62 on which of the cohesive connection with the lateral surface of the frame element 63 which is the cavity 64 is facing, is provided. The first wall thickness of the support element 61 is smaller than the first wall thickness parallel extension or dimension of the sealing element 62 ,

According to 11b has the sealing element 62a a cross-sectional area which substantially corresponds to a rectangle. The side of the rectangle, which is the support element 61 facing, shows a substantially rectangular lateral surface of the sealing element 62a on which of the cohesive connection with the lateral surface of the frame element 63 which is the cavity 64 is facing, is provided. The first wall thickness of the support element 61 is smaller than the first wall thickness parallel extension or dimension of the sealing element 62a ,

According to 11c extends the projection 69 from the frame element 63a or from the support element 61a , preferably rib-shaped, from the lateral surface of the frame member 63a which is the cavity 64 is facing. The associated sealing element 62b has a recess for receiving the projection 69 on. The first wall thickness of the support element 61a is smaller than the first wall thickness parallel extension or dimension of the sealing element 62b , This design offers the particular advantage that the for the cohesive connection of the support element 61a with the sealing element 62b available area is larger than in the execution according to 11b , This design offers the particular advantage that the support of the sealing element 62b through the lead 69 of the support element 61a is improved.

According to 11d has the support element 61b or its frame element 63b a cross-sectional area with three, substantially rectangular, sections. The second portion is spaced from the first portion by the third portion. The first section and the third section are provided for spacing one of these housing covers from this housing middle section and have the same first wall thickness in FIG Essentially parallel to the housing longitudinal axis. The second section has a smaller wall thickness and is for cohesive connection with the two-part sealing element 62c ' . 62c '' designed. The two parts 62c ' . 62c '' the two-part sealing element are with opposite lateral surfaces of the second portion of the frame member 63b connected. The two parts 62c ' . 62c '' of the two-part sealing element extend in the direction of the first wall thickness in its undeformed state over the first portion and the third portion of the frame member 63b out. When the sealing device 46 is inserted and clamped between the housing cover and the middle part of the housing, then the two-part sealing element 62c ' . 62c '' reversibly and elastically transferred to its deformed state. In the deformed state, not shown, the parts touch 62c ' . 62c '' the two-part sealing element, the flat flange of the housing cover and the end wall of the housing middle part as well as the respective lateral surfaces of the first portion and the third portion of the frame member 63b ,

LIST OF REFERENCE NUMBERS

1

Energy storage device

2

cell arrangement

3, 3a

electrochemical energy storage devices ( 3 . 3a )

28

device housing

29

Housing body

30

Receiving space in the middle part of the housing

31

Housing opening to the receiving space

32

housing jacket

33

End wall of the middle part of the housing

34

housing inner wall

35, 35a

housing cover

39, 39a

Device connection, electrical

40

Data Interface

46, 46a

sealing device

50, 50a

independent mechanical fastener

61

Support element of the sealing device

62

Sealing element of the sealing device

63, 63a, 63b, 63c

Frame element of the support element

64

Cavity of the sealing device

65, 65a

first lateral surface of a frame element

66

metal inserts

67

Recess for a mechanical connection means

68

first positioning element

69

head Start

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• "Technische Mechanik 2", 8th Edition, Gross, Hauger, Schnell, Schröder, Springer Verlag [0028]
• DIN 50154 [0028]
• ISO 527 [0028]
• ISO 14129 [0028]
• ISO 1798 [0028]
• ISO 1926 [0028]
• ISO 37 [0028]
• ISO 3167 [0028]
• DIN 53455 [0028]
• DIN 18136 [0028]
• DIN 50106 [0028]

Claims (12)

Energy storage device ( 1 ) for providing electrical energy, with a cell arrangement ( 2 ), which comprise at least two, essentially parallelepiped, interconnectable, electrochemical energy storage devices ( 3 . 3a ), and with a device housing ( 28 ), which a middle part of the housing ( 29 ) and at least one housing cover ( 35 ), wherein the middle part of the housing ( 29 ) is configured to receive the cell assembly at least in sections, and wherein the housing cover ( 35 ) with the middle part of the housing ( 29 ) is releasably mechanically connectable, and with a sealing device ( 46 ), which between the middle part of the housing ( 29 ) and the housing cover ( 35 ) can be inserted, which a support element ( 61 ) and a sealing element ( 62 ), wherein the support element ( 61 ) with four frame elements ( 63 . 63a . 63b . 63c ) is formed, which at least partially around a substantially rectangular cavity ( 64 ) can be arranged, which are connectable to each other, wherein the sealing element ( 62 ), preferably within the cavity ( 64 ), with at least one of the frame elements ( 63 . 63a . 63b . 63c ) is materially connectable, wherein a predetermined ratio q, defined as the quotient of the elastic modulus of the sealing element ( 62 divided by the modulus of elasticity of the support element ( 61 ), less than 0.65. Energy storage device ( 1 ) according to claim 1, wherein the, preferably substantially cuboid, housing middle part ( 29 ) a housing shell ( 32 ), wherein the housing shell ( 32 ) extends along a housing longitudinal axis, and is configured, a, preferably substantially cuboid, receiving space ( 30 ) at least in sections relative to the surroundings of the device housing ( 28 ), the reception room ( 30 ) the cell arrangement ( 2 ) at least in sections, and at least one, preferably substantially rectangular, housing opening ( 31 ), which is arranged substantially perpendicular to the housing longitudinal axis, wherein the receiving space ( 30 ) through the housing opening ( 31 ), wherein the housing opening ( 31 ) with the housing cover ( 35 ) is closable, and a first end wall ( 33 ), which is arranged substantially perpendicular to the housing longitudinal axis, which for contacting the sealing device ( 46 ), preferably one of the first lateral surfaces ( 65 . 65a ), and a housing inner wall ( 34 ), which the receiving space ( 30 ) and to the first end wall ( 33 ) bordered, preferably cut to length from a continuous casting profile. Energy storage device ( 1 ) according to one of the preceding claims, wherein at least one of the frame elements ( 63 . 63a . 63b . 63c ) two first lateral surfaces ( 65 . 65a ), wherein the two lateral surfaces ( 65 . 65a ) are arranged substantially parallel to each other and spaced from each other with a first wall thickness, wherein the thickness of the sealing element ( 62 ), substantially parallel to the first wall thickness, greater in its undeformed state than the first wall thickness. Energy storage device ( 1 ) according to one of the preceding claims, wherein the sealing element ( 62 ) is assumed to assume a deformed state, preferably when it is between the housing middle part ( 29 ) and the housing cover ( 35 ), wherein preferably the thickness of the sealing element ( 62 ) in the deformed state substantially the first wall thickness of the support element ( 61 ) corresponds. Energy storage device ( 1 ) according to one of the preceding claims, wherein the sealing device ( 46 ) has an opening which through the sealing element ( 62 ) and / or the support element ( 61 ) is limited, said opening in the undeformed state of the sealing element ( 62 ) is at least as large as the housing opening ( 31 ), wherein preferably the sealing element ( 62 ) in the deformed state at least in sections over the Gehäuseinnenwandung ( 34 ) and in the direction of the housing longitudinal axis or in the direction of the receiving space ( 30 ) stands out. Energy storage device ( 1 ) according to one of the preceding claims, wherein the sealing device ( 46 ) between the housing cover ( 35 ) and the middle part of the housing ( 29 ) is inserted, wherein the housing cover ( 35 ) in the direction of the middle part of the housing ( 29 ) is clamped, wherein the sealing element ( 62 ) is converted into its deformed state, wherein preferably the sealing element ( 62 ) in the deformed state at least in sections over the Gehäuseinnenwandung ( 34 ) and in the direction of the housing longitudinal axis or in the direction of the receiving space ( 30 ) stands out. Energy storage device ( 1 ) according to one of the preceding claims, wherein the sealing element ( 62 ) is formed with an elastomer or plastomer, wherein the support element ( 61 ) is formed with a metal and / or with a, preferably fiber-reinforced, polymer. Energy storage device ( 1 ) according to one of the preceding claims, wherein the support element ( 61 ), preferably at least one of the frame elements ( 63 . 63a . 63b . 63c ), with a metal insert ( 66 ), wherein preferably the metal insert ( 66 ) serves the shielding of electromagnetic radiation, and / or at least one recess ( 67 ), which for receiving an independent mechanical connection means ( 50 ) and / or a positioning means, wherein preferably the recess ( 67 ) in a corner region of the support element ( 61 ) is arranged. Energy storage device ( 1 ) according to one of the preceding claims, wherein the housing middle part ( 29 ), the housing cover ( 35 ) and / or the sealing device ( 46 ) a first positioning element ( 68 ), which is configured, an undesired relative movement of the sealing device ( 46 ) relative to the middle part of the housing ( 29 ) and / or with respect to the housing cover ( 35 ), wherein preferably the first positioning element ( 68 ) is formed as a recess or as a projection. Energy storage device ( 1 ) according to one of the preceding claims, wherein at least one cross-sectional area of the sealing device ( 46 ), preferably of the sealing element ( 62 ), is substantially rectangular or has two substantially perpendicular to each other arranged edge lines or at least partially curved edge line has, and / or wherein at least one of the frame elements ( 63 . 63a . 63b . 63c ) at least in sections a projection ( 69 ), wherein the projection ( 69 ) into the cavity ( 64 ), wherein preferably the sealing element ( 62 ) a recess for receiving the projection ( 69 ) having. Method for closing an energy storage device ( 1 ), preferably in accordance with one of the preceding claims, with the steps S1 providing one of these housing middle parts ( 29 ), one of the housing cover ( 35 ) and one of the sealing devices ( 46 ), S2 insertion of the sealing device ( 46 ) between the middle part of the housing ( 29 ) and the housing cover ( 35 ), S3 clamping of the middle part of the housing ( 29 ) and housing cover ( 35 ), preferably with an independent mechanical connection means ( 50 ), wherein the sealing element ( 62 ) is transferred from its undeformed state in its deformed state, whereupon one of these first lateral surfaces ( 65 . 65a ) the end wall ( 33 ) and another of these first lateral surfaces ( 65 . 65a ) the housing cover ( 35 ), so that preferably the support element ( 61 ) the middle part of the housing ( 29 ) and the housing cover ( 35 ), preferably with S4 inserting the cell assembly ( 2 ) in the reception room ( 30 ), preferably before step S3. Method for producing one of these sealing devices ( 46 ) according to one of the device claims, with the steps S5 making the support element ( 61 ) with at least one, preferably four, of these frame elements ( 63 . 63a . 63b . 63c ), with arranging the frame elements ( 63 . 63a . 63b . 63c ) around the cavity ( 64 ), with connecting the frame elements ( 63 . 63a . 63b . 63c ) with each other preferably for the formation of the support element ( 61 ) as a frame around the cavity ( 64 ), wherein preferably at least one of the frame elements ( 63 . 63a . 63b . 63c ) this advantage ( 69 ), wherein particularly preferably the projection ( 69 ) as a rib along one of the lateral surfaces of the frame element ( 63 . 63a . 63b . 63c ) in the cavity ( 64 ), S6 integral connection of the sealing element ( 62 ) with one of the lateral surfaces of the support element ( 61 ), preferably with lateral surfaces of a plurality of these frame elements ( 63 . 63a . 63b . 63c ), wherein preferably the sealing element ( 62 ) with a recess for receiving the projection ( 69 ) is formed, particularly preferably by receiving the projection ( 69 ) in the recess.

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