DE102014017219A1 - Cell frame and method for producing a cell frame for a battery cell - Google Patents

Abstract

Cell frame for supporting an energy storage device, in particular a lithium-ion cell, with an electrochemical electrode assembly and at least one current conductor, wherein the current conductor is electrically connected to the electrode assembly. The cell frame has a major surface and at least one lateral surface, the lateral surface adjacent to the major surface and inclined relative to the major surface. The cell frame has a cell receiving portion, wherein the cell receiving portion is configured to at least partially receive the electrode assembly. The cell frame has a contact element receiving portion, wherein the contact element receiving portion is configured to receive at least one contact element for electrically connecting the current conductor with a cell external terminal when the electrode assembly is at least partially received by the cell receiving portion. The contact element receiving portion is formed with a recess in the cell frame, wherein the recess has two intersecting gap-shaped depressions in the side surface.

Description

The present invention relates to a cell frame and a method for manufacturing a cell frame for a battery cell. The invention will be described in the context of lithium-ion batteries for the supply of motor vehicle drives. It should be noted that the invention may also be used regardless of the type of battery, the chemistry of the electrochemical energy storage device or regardless of the type of powered drive.

Batteries or energy storage arrangements are known with a plurality of energy storage devices and a plurality of frames, which each serve to support at least one of the energy storage devices.

The expense of producing some types of batteries is usually perceived as very problematic.

It is an object of the invention to reduce the effort for the production of a battery or energy storage device.

The object is achieved by the teaching of the independent claims. Preferred developments of the invention are the subject of the dependent claims.

A first aspect of the invention relates to a cell frame for supporting an energy storage device, in particular a lithium-ion cell. Such an energy storage device has an electrochemical electrode arrangement and at least one current conductor, wherein the current conductor is electrically connected to the electrode arrangement. The cell frame has a major surface and at least one lateral surface, the lateral surface adjacent to the major surface and inclined relative to the major surface. The cell frame has a cell receiving portion, wherein the cell receiving portion is configured to at least partially receive the electrode assembly. The cell frame has a contact element receiving portion, wherein the contact element receiving portion is configured to receive at least one contact element for electrically connecting the current conductor with a cell external terminal when the electrode assembly is at least partially received by the cell receiving portion. The contact element receiving portion is formed with a recess in the cell frame, wherein the recess has two intersecting gap-shaped depressions in the side surface.

Occasionally, the production of a battery with prefabricated components or assemblies. During their operation, batteries may be exposed to different requirements or loads. The adaptation of a battery to different requirements or loads can be done by the use of various prefabricated components or assemblies.

By having a contact element receiving portion configured to receive different contact elements for various electrical connections of one of the energy storage devices of the energy storage device, a plurality of different contacting possibilities can be provided for the same type of cell frame without requiring different embodiments of the cell frame itself. As a result, it is also possible to achieve a reduction in the cost of storage and / or a reduced outlay in the picking of components or assemblies for the production of an energy storage arrangement.

By different contact elements can be combined with the aforementioned cell frame during the production of a battery or energy storage device, the energy storage device to be produced can be better adapted to mechanical and / or electrical requirements. This may in particular accompany the fact that the execution of the electrical interconnection of two of the energy storage devices can be made more economical. In particular for the production of an energy storage arrangement, one of the contact elements can be selected from a group of prefabricated contact elements having different electrical or mechanical properties or geometries, wherein the different prefabricated contact elements need not be adapted to several, in particular conflicting, requirements. This reduces in particular the production costs for the various prefabricated contact elements.

This solves the underlying task.

For the purposes of the invention, a frame is to be understood in particular to mean a device which has four, substantially rod-shaped, frame elements and a substantially cuboid cell receiving section. The frame elements surround the cell receiving portion at least in sections. The cell receiving portion is configured for at least partially receiving at least one of the energy storage devices. The four frame members are arranged corresponding to the sides of a rectangle and connected to each other in particular cohesively at the corners of the rectangle. The like interconnected frame members bound the cell receiving portion to the environment of the frame. The shape of the frame substantially corresponds to a cuboid with a central recess which forms the cell receiving portion. The cuboid has two, to each other substantially parallel arranged, the largest lateral surfaces, which are spaced from each other. The distance between the largest lateral surfaces is referred to below as the frame thickness. The cell receiving portion is accessible through at least one of the largest lateral surfaces.

The cell frame is intended to be stacked adjacent to another of the cell frames during manufacture of a battery. The direction along which one or more further cell frames are arranged adjacent to the first cell frame is hereinafter referred to as stacking direction. The particular cuboid cell frame has two, arranged parallel to each other, largest lateral surfaces. Preferably, the stacking direction is aligned perpendicular to one of the largest lateral surfaces of the cell frame.

In the context of the invention, an energy storage device is to be understood as meaning, in particular, a device which serves to provide electrical energy. Preferably, the energy storage device has a substantially cuboid shape. The energy storage device has a, in particular rechargeable, electrochemical electrode arrangement, wherein the electrode arrangement serves to convert chemical energy into electrical energy, and preferably serves for conversion into electrical energy into chemical energy. The energy storage device has at least one current conductor, preferably at least two current conductors of different polarity. Such a current conductor is designed for electrical contacting of the electrode arrangement. The current collector extends at least partially into the environment of the energy storage device. Preferably, two of the current conductors of different polarity at least partially extend in the same direction in the environment of the energy storage device. Preferably, the current collector on two legs, wherein the first leg is inclined or angled relative to the second leg. Preferably, the energy storage device comprises a sheath, which is formed with a composite film. Alternatively, the energy storage device has a casing, which is formed with a metal sheet.

The energy storage device is provided to be stacked adjacent to another of the energy storage devices during manufacture of a battery. The direction along which one or more further energy storage devices are arranged adjacent to the first energy storage device for forming a so-called cell stack corresponds to the stacking direction. The particular cuboid energy storage device has two, mutually parallel, largest lateral surfaces. Preferably, the stacking direction is aligned perpendicular to one of the largest lateral surfaces of the energy storage device.

• • durch welche der Zellaufnahmeabschnitt zugängig ist, und
• • welche innerhalb einer Batterie im Wesentlichen senkrecht zu der Stapelrichtung ausgerichtet ist, und
• • welche im Wesentlichen parallel zu einer der größten Mantelflächen der wenigstens teilweise im Zellaufnahmeabschnitt aufgenommenen Energiespeichereinrichtung ausgerichtet ist, und
• • welche im Wesentlichen senkrecht zur Richtung der Rahmendicke ausgerichtet ist.

In the sense of the invention, a main surface is to be understood as meaning in particular a lateral surface of the cell frame.

• • through which the cell receiving section is accessible, and
• • which is aligned within a battery substantially perpendicular to the stacking direction, and
• Which is aligned substantially parallel to one of the largest lateral surfaces of the at least partially accommodated in the cell receiving portion energy storage device, and
• • which is aligned substantially perpendicular to the direction of the frame thickness.

Within the meaning of the invention, a lateral surface is to be understood in particular to be a lateral surface of the cell frame, which is inclined with respect to the main surface at a predetermined angle, preferably at an angle of approximately 45 °, approximately 60 °, approximately 75 ° or particularly preferably approximately 90 ° , Preferably, the side surface adjoins the main surface at the predetermined angle. Preferably, the major surface merges with a radius in the side surface. Preferably, the predetermined angle is formed by a tangent to the side surface and a tangent to the major surface. Preferably, side surface is aligned substantially parallel to the stacking direction or substantially parallel to the direction of the frame thickness. Through the side surface of the cell receiving portion is not accessible. The side surface faces the vicinity of the cell frame. Preferably, the side surface of a lateral surface corresponds to one of the frame elements. Preferably, the area of the side surface is smaller than the area of the main surface.

For the purposes of the invention, a cell receiving section is to be understood as meaning in particular a recess of the cell frame or a cavity in the cell frame. The cell receiving portion is configured to at least partially receive the electrode assembly. Preferably, the cell receiving portion is configured to at least partially receive the electrode assembly of a first energy storage device and the electrode assembly of a second energy storage device. The cell receiving section is through the Main area accessible. Preferably, the cell receiving portion is formed substantially cuboid. Preferably, the cell receiving portion is formed as a cavity of the cell frame, wherein the cavity is accessible both through the main surface and through a surface arranged parallel to the main surface.

In the context of the invention, a contact element receiving section is to be understood in particular to mean a section of the cell frame, in particular a section of one of the frame elements of the cell frame, which is designed to at least partially accommodate at least one of the contact elements. Preferably, the contact element receiving portion is designed for mechanical connection with at least one of the contact elements. The at least two intersecting gap-shaped recesses are accessible at least through the side surface. Preferably, at least one of the slot-shaped depressions extends along a recess longitudinal axis. Particularly preferably, the recess longitudinal axis is aligned substantially parallel to a longitudinal axis of one of the frame elements. Particularly preferably, at least one shape in depressions perpendicular to the depression of the longitudinal axis has a substantially rectangular or trapezoidal cross-section. Preferably, at least one of the slot-shaped depressions extends from the side surface into the material of the cell frame. Preferably, the contact element receiving portion serves as a counterhold or bending contour when bending over one of the current conductors, particularly preferably for forming a leg of the current conductor, wherein the leg is intended to extend along the side surface. Preferably, the contact element receiving portion is disposed adjacent to one of the current conductors of an energy storage device to be supported.

In the context of the invention, a contact element is to be understood in particular to mean an electrically conductive element which serves for the electrical contacting of one of the current conductors of at least one of the energy storage devices. Preferably, the contact element is designed in several parts. Preferably, the contact element is configured to be electrically connected to one respective current conductor of two adjacent ones of the energy storage devices, particularly preferably in a material-locking manner.

• • eine weitere Energiespeichereinrichtung, insbesondere ein Stromableiter der weiteren Energiespeichereinrichtung, oder
• • ein Batterieanschluss oder ein Batteriepol einer übergeordneten Batterie, oder
• • ein elektrischer Verbraucher.

Under a cell external connection is to be understood in the sense of the invention in particular

• A further energy storage device, in particular a current conductor of the further energy storage device, or
• • a battery connection or a battery pole of a higher-level battery, or
• • an electrical consumer.

Below preferred developments are described, which can be advantageously combined with each other without an express appropriate notice.

According to a preferred embodiment, the contact element receiving portion has at least two, four or more protrusions, wherein the at least two protrusions extend substantially perpendicular to the side surface, preferably into the material of the cell frame. Preferably, the at least two projections bound at least one of the gap-shaped recesses. Preferably, at least one of the projections adjoins the main surface. Preferably, at least one of the projections extends along a projection longitudinal axis, particularly preferably with a substantially rectangular or circular cross section. Preferably, a plurality of the projections are spaced along an axis, wherein the axis is aligned substantially parallel or perpendicular to the main surface. Preferably, the projection longitudinal axes of four of the projections pass through the corners of a parallelogram, rectangle or square. Preferably, at least one of the projections is cuboid, at least partially conical or at least partially pyramidal. The preferred development can in particular offer the advantage that one of the contact elements can be better supported. In particular, the preferred development can offer the advantage that a gap between at least two of the projections simplifies the electrical or material connection of one of the contact elements to one of the current conductors.

According to a preferred development, the cell frame has at least one, two or more first connection elements or first latching elements, which is respectively arranged within the contact element receiving section and which is designed in each case for the mechanical connection of the cell frame with one of the contact elements. Preferably, the at least one first connection element or the at least one first latching element is arranged in the main surface or the side surface of the cell frame. Preferably, the first connection element or the first latching element is designed for mechanical engagement with one of the contact elements. Preferably, the first connecting element or the first locking element of the following group is taken, which includes: opening, hole, blind hole, pawl, hook, groove, hole, undercut, projection. The preferred development can offer the particular advantage that the inclusion of one of the contact elements in the contact element receiving portion is mechanically stable, or that the mechanical Connection of the cell frame with the contact element can be done without tools.

According to a preferred embodiment, the cell frame has at least one, two four or more Spannmittelausnehmungen, whose longitudinal axis is aligned in each case substantially perpendicular to the main surface or the stacking direction, and which is respectively configured to receive a preferably rod-shaped clamping means or a tension rod. The tensioning means or the tension rod serves for the mechanical connection of at least two of the cell frames. Preferably, the Spannmittelausnehmung is formed as a particularly preferred cylindrical opening or through hole. Preferably, the Spannmittelausnehmung is substantially circular or cylindrical. Preferably, the Spannmittelausnehmung extends through the cell frame or one of the frame members. The preferred development can in particular offer the advantage that the installation of the battery is simplified, or that the connection of several of the cell frame is simplified with each other, or that the connection of several of the cell frame can be done with a stressed with a tensile force or tension rod. Preferably, the tensioning means or the tension rod is used to act on one of the current conductors with a normal force component, in particular perpendicular to the main surface.

According to a preferred embodiment, the cell frame has at least one, two or more Spannkörperausnehmungen, which are each designed to accommodate an elastic clamping body at least partially or partially and which are accessible through the main surface. Preferably, the clamping body serves to act on one of the current conductors with a normal force component, in particular perpendicular to the main surface. In particular, the clamping body in conjunction with an adjacent one of the cell frames serves, in particular, to counteract undesired displacement of the current conductor during operation of the battery. Preferably, the Spannkörperausnehmung is formed as a recess which extends from the main surface into the material of the cell frame. Preferably, the Spannkörperausnehmung formed as a blind hole or as a groove. Preferably, at least one of the clamping body recesses is arranged adjacent to one of the current conductors of one of the energy storage devices in one of the main surfaces or largest lateral surfaces of the cell frame. This preferred development can in particular offer the advantage that an undesired displacement of the clamping body can be counteracted.

According to a preferred embodiment, the cell frame on one of the elastic clamping body, which is at least partially, preferably predominantly, preferably only partially, introduced into the Spannkörperausnehmung and is designed so that when he at least partially introduced into the Spannkörperausnehmung and the electrode assembly at least partially is received by the cell receiving portion, the current conductor, which is electrically connected to the electrode assembly, applied to a normal force component. Preferably, the normal force component is a consequence of an elastic deformation of the clamping body. Preferably, one or more of the clamping body are formed as elastic strips or elastic round rods. The preferred development can in particular offer the advantage that an undesired displacement of the current conductor during operation of the battery can be counteracted.

According to a preferred development, at least one of the slot-shaped recesses is accessible through the side surface and through the main surface. The gap-shaped depression is suitable for receiving an independent tool for the mechanical or integral connection of one of the current conductors with one of the contact elements. The tool may be inserted through the side surface of the cell frame into the slot-shaped recess and brought into contact with one of the current conductors or contact elements through the main surface of the cell frame. Preferably, an arm of a pair of pliers or a part of a joining device can be received by the gap-shaped recess. In particular, the preferred development can offer the advantage that the electrical or cohesive connection of one of the current conductors with one of the contact elements, in particular with its angle plate set out below, is simplified.

• • ausgestaltet ist, mittels des Verbindungsmittels mit einer Normalkraftkomponente in Richtung wenigstens eines der Stromableiter beaufschlagt werden, und
• • derart geformt ist, dass es, wenn das Kontaktelement durch den Kontaktelementaufnahmeabschnitt zumindest teilweise aufgenommen ist, in wenigstens eine der spaltförmigen Vertiefungen eingreift.

According to a preferred development, the cell frame has a contact element, which is separable from the cell frame and configured so that it can be received by the contact element receiving portion, and has a mechanical connection means and an anchor part, wherein the anchor part

• • is configured to be acted upon by means of the connecting means with a normal force component in the direction of at least one of the current conductor, and
• • is shaped such that, when the contact element is at least partially received by the contact element receiving portion, it engages in at least one of the gap-shaped recesses.

One each of the current conductors of two adjacent energy storage devices can be interconnected between the anchor part and the Connecting means are arranged. Depending on one of the current conductors of two adjacent energy storage devices can be connected to each other by the anchor member and the connecting means positively or frictionally. In this case, the cell frame or its contact element receiving portion, the current conductor of the two adjacent energy storage devices.

Preferably, the connecting means is designed as a screw, bolt or rivet. Preferably, the anchor part has at least one through hole for the connecting means, particularly preferably with an internal thread.

Preferably, the contact element has at least one angle plate or metal plate, particularly preferably with at least one through hole or internal thread. Particularly preferably, the angle plate or metal plate on a weld nut or a rivet nut or a threaded indentation with internal thread for the connecting means.

Preferably, the connecting means extends through the angle plate or the metal plate into the anchor part, particularly preferably into the material of the cell frame. Preferably, the angle plate or the metal plate and the anchor part can be connected to each other by means of forming or clinching or clinching. Preferably, each one of the current conductors of two adjacent energy storage devices can be arranged with one another between the anchor part and the angle plate and connected non-positively or frictionally.

Preferably, the angle plate or the metal plate is used together with the contact element receiving portion and with the connecting means for bending one of the current collector, particularly preferably for forming a leg or arrester portion of the current collector, wherein the leg or Ableiterabschnitt is provided to be arranged parallel to the side surface.

The armature part and the arrester sections or limbs of a respective current conductor of two adjacent energy storage devices preferably form the contact element.

In particular, the preferred development can offer the advantage that the connection of the two current conductors can essentially take place without the supply of thermal energy. The preferred development can offer the particular advantage that the connection of the two current conductors can be done without much equipment.

According to a preferred development, the cell frame has a contact element, which is separable from the cell frame and configured so that it can be received by the contact element receiving portion, and has at least one single or double angled angle plate with at least one or more tool openings, wherein at least one the gap-shaped recesses is accessible through the tool opening from the environment when the contact element, in particular its angle plate, is at least partially received by the contact element receiving portion.

Preferably, for the electrical connection or during the electrical connection of one of the current collector of one of the energy storage devices with the angle plate, a tool can be guided through the tool opening. Preferably, at least one of the tool openings is dimensioned such that a tool can be guided through the tool opening for the electrical connection or during the electrical connection of the current conductor with the angle plate.

Preferably, the angle plate is designed to be materially connected to at least one of the current collector. Particularly preferably, the angle plate is designed to be materially connected to one of the current conductors of two adjacent of the energy storage devices. Preferably, the angle plate is configured to apply at least in sections on the side surface. Preferably, the angle plate is designed to provide the electrical potential of the current conductor, which is arranged adjacent to the main surface, on a further lateral surface of the cell frame, which is particularly preferably parallel to the main surface (parallel surface). Preferably, the angle plate serves as a counterholder or bending contour when bending over one of the current conductors, particularly preferably for forming a leg of the current conductor, wherein the leg is intended to extend along the side surface. Preferably, the angle sheet is angled twice, wherein two of the angled portions are aligned substantially parallel to each other.

Preferably, the angle plate and sections or legs of a respective Stromableiters two adjacent energy storage devices form the contact element.

Preferably, the angle plate has at least one, two or more second connecting elements or second latching elements, which are each designed for mechanical connection to one of the first connecting elements of the contact element receiving portion. Preferably, the second connecting element or the second locking element is taken from the following group, which includes: opening, hole, blind hole, pawl, hook, groove, hole, undercut, projection, plastically deformable tongue.

The preferred further development can in particular offer the advantage that the contact resistance between the contact element and at least one of the current conductors is reduced, in particular, by their integral connection with respect to a frictional or non-positive connection.

According to a second aspect of the invention, an energy storage arrangement has one of the aforementioned cell frames, two of the energy storage devices and a contact element which can be separated from the cell frame and at least partially received by the contact element receiving portion of the cell frame, wherein the contact element with a first arrester portion of the current the first energy storage device and a second arrester portion of the current collector of the second energy storage device is formed, wherein the first arrester portion and the second arrester portion are connected to each other mechanically and / or cohesively.

Preferably, the contact element is formed integrally with the first arrester section and the second arrester section, particularly preferably wherein the two arrester sections are connected to one another in a material-locking manner. Preferably, the contact element is supported by the side surface. Preferably, at least one of the slot-shaped depressions can receive a joining tool or a heat sink, particularly preferably while the cohesive connection of each of the current conductors of two adjacent ones of the energy storage devices is produced.

The current collectors of second adjacent energy storage devices which are connected to one another in a materially connected manner preferably form the contact element.

According to a preferred embodiment, the contact element has a potential tap, wherein the potential tap is configured to be electrically connected to a battery terminal or to a load. Preferably, the potential tap has a thread. Preferably, the potential tap is formed with a projection, which preferably extends in the stacking direction. The preferred development can in particular offer the advantage that the mechanical or electrical connection of a connecting line to the contact element is more stable and / or more durable.

The energy storage arrangement according to the second aspect of the invention may in particular offer the advantage that the contact resistance between the current conductors of the two energy storage devices is reduced compared to their frictional or force-locking connection. The energy storage arrangement according to the second aspect of the invention can in particular offer the advantage that the interconnection of the two energy storage devices is more permanent.

According to a third aspect of the invention, an energy storage arrangement comprises one of the cell frames with one of the armature parts and one of the mechanical connection means, and two energy storage devices, in particular lithium-ion cells, each having an electrochemical electrode arrangement and at least one current conductor electrically connected thereto Electrode arrangements of the energy storage devices are each at least partially accommodated in the cell receiving portion of the cell frame and are electrically interconnected with at least one of the contact elements, preferably in series.

Preferably, at least one of the current conductors of the two energy storage devices has an angled discharge section. Particularly preferably, the two angled Ableiterabschnitte overlap each other, in particular along the side surface of the cell frame. Particularly preferably, at least one of the angled Ableiterabschnitte on a recess for receiving the mechanical connection means. Particularly preferably, the angled Ableiterabschnitte are positively or frictionally connected to each other, particularly preferably by the armature part is acted upon by a normal force components in the direction of the angled legs of the two current conductors.

Preferably, the energy storage arrangement has at least one, two or four of the clamping means, wherein particularly preferably at least one of the clamping means is designed as a pull rod.

The energy storage arrangement according to the third aspect of the invention can in particular offer the advantage that the outlay for the production of the energy storage arrangement can be reduced. The energy storage arrangement according to the third aspect of the invention can in particular offer the advantage that the effort for interconnecting the two energy storage devices can be reduced. The energy storage device according to the third aspect of the invention can in particular the Provide advantage that the electrical connection of the two current collector can be done substantially without the supply of heat energy.

According to a fourth aspect of the invention, an energy storage arrangement has one of the cell frames with one of the angle plates, and two energy storage devices, in particular lithium-ion cells, each having an electrochemical electrode assembly and at least one current conductor electrically connected thereto, wherein the electrode assemblies of the energy storage devices each at least are partially received in the cell receiving portion of the cell frame and are electrically interconnected with at least one of the contact elements, preferably in series.

Preferably, each one of the current conductors of the two energy storage devices are arranged substantially parallel to each other. Preferably, the cell frame between each one of the current conductor of the two energy storage devices is arranged and spaced from each other.

Preferably, a first portion of the angle sheet overlaps one of the current conductors of the first one of the energy storage devices and a second portion of the angle sheet substantially parallel to the first portion overlaps one of the current conductors of the second one of the energy storage devices.

Preferably, a current conductor of a first of the energy storage devices is connected in sections cohesively to the angle plate, particularly preferably with a first angled portion of the angle plate. Preferably, a current conductor of a second of the energy storage devices is connected in sections cohesively with the angle plate, particularly preferably with a second angled portion of the angle plate. This may be accompanied by the advantage of a reduced contact resistance compared to a frictional or non-positive connection.

Preferably, the energy storage arrangement has at least one, two or four of the clamping means, wherein particularly preferably at least one of the clamping means is designed as a pull rod.

The energy storage arrangement according to the fourth aspect of the invention can in particular offer the advantage that the outlay for the production of the energy storage arrangement can be reduced. The energy storage arrangement according to the fourth aspect of the invention can in particular offer the advantage that the outlay for interconnecting the two energy storage devices can be reduced. The energy storage arrangement according to the fourth aspect of the invention can in particular offer the advantage that the electrical connection of the two current conductors can take place substantially without the supply of heat energy.

According to a preferred embodiment, the energy storage arrangement according to the second, third or fourth aspect, a contact plate, which is electrically connected to the contact element; and a connecting lead which is electrically connectable to the contact sheet. Preferably, the contact plate has a thread for a mechanical connection means, which serves the electrical connection of the connecting cable to the contact plate. Preferably, the contact plate on a threaded bolt or a socket with internal thread. The preferred development can in particular offer the advantage that the preparation of the energy storage arrangement for providing electrical energy to the connection line or that the electrical connection of the energy storage device can be done, for example with a consumer through the connecting line without much equipment.

According to a preferred development, the energy storage arrangement according to the second, third or fourth aspect comprises at least two of the cell frames and at least three of the energy storage devices, wherein the first of the cell frames is disposed between the current conductors of the first and second of the energy storage devices and wherein the second of the cell frames is between the Stromableitern the second and third of the energy storage devices is arranged. At least the first cell frame has at least one of the clamping body recesses. Preferably, the at least one clamping body recess in the main surface of the first cell frame is arranged adjacent to one of the current conductors of the second energy storage device. Furthermore, the first cell frame has at least one of the elastic clamping bodies. Preferably, the at least one clamping body is designed as an elastic strip or as an elastic round rod. The at least one clamping body is at least partially inserted or at least partly inserted into the at least one of the clamping body recesses. The clamping body is used to act on one of the current collector with a normal force component, in particular perpendicular to the main surface, wherein the normal force component can cause a frictional force. Preferably, the first cell frame and the second cell frame are mechanically connected to each other, particularly preferably braced against each other, more preferably by one of the clamping means. The preferred development can in particular offer the advantage that an undesired relative movement of the current conductor with respect to the first cell frame can be countered.

According to a fifth aspect of the invention, a method of manufacturing a cell frame (manufacturing method) includes step

S1 forms, in particular injection molding or machining, of the cell frame; which has: a major surface and at least one side surface adjacent to the major surface and inclined with respect to the major surface; a cell receiving portion for at least partially receiving an electrochemical electrode assembly of an energy storage device; and a contact element receiving portion for receiving at least one contact element for electrically connecting a current conductor of the energy storage device with a cell external terminal when the electrode assembly is at least partially received by the cell receiving portion; wherein the contact element receiving portion is formed by a recess in the cell frame, which has two intersecting gap-shaped depressions in the side surface.

The manufacturing method according to the fifth aspect may in particular offer the advantage that the contact element receiving portion of the cell frame different contact elements for various electrical connections of current conductors can be accommodated and the number of different versions of the cell frame can be reduced without the variety of variety of electrical contacts suffers ,

By different contact elements can be combined with the aforementioned cell frame during the production of an energy storage device, the energy storage device to be produced can be better adapted to mechanical and / or electrical requirements. This may in particular accompany the fact that the execution of the electrical interconnection of two of the energy storage devices can be made more economical. In particular for the production of an energy storage arrangement, one of the contact elements can be selected from a group of prefabricated contact elements having different electrical or mechanical properties or geometries, wherein the different prefabricated contact elements need not be adapted to several, in particular conflicting, requirements. This reduces in particular the production costs for the various prefabricated contact elements.

According to a sixth aspect of the invention, a method for producing an energy storage arrangement comprises the step S1, and step

S3 arranging the cell frame between a first one of the current conductors of a first one of the energy storage devices and a second one of the current conductors of a second one of the energy storage devices.

Preferably, after step S3, the first current collector of the first energy storage device is at least partially on the main surface and the second current collector of the second energy storage device at least partially on a substantially parallel to the main surface lateral surface of the cell frame. Preferably, at least one of the electrode arrangements of the two energy storage devices is at least partially arranged in the cell receiving section during step S3. Subsequent to step S3, the energy storage devices are arranged for electrical connection.

According to a first alternative of the method according to the sixth aspect of the invention, the steps S2 and S4 can be combined with the steps S1 and S3:
S2 supplying an anchor part of the contact element in the contact element receiving portion, wherein the anchor part is configured to be acted upon by a connecting means of the contact element with a normal force component in the direction of a current conductor, wherein the anchor part is shaped such that, when the contact element through the contact element receiving portion at least is partially received, engages in at least one of the slot-shaped depressions,

S4 electrically or force-lockingly connecting the first current conductor to the second current conductor by mechanically connecting the connection means to the anchor part such that the anchor part is acted upon by the connecting means with a normal force component in the direction of at least one of the current conductors.

Preferably, step S5 may be combined with steps S1, S3, S2 and S4:
S5 bending or arranging the first current collector and the second current collector such that a discharge section of the first current collector overlaps a discharge section of the second current collector, in particular before step S4.

Preferably, the side surface of the cell frame merges with a radius of at least 0.5 mm in its main surface, particularly preferably to avoid kinking of the current conductor during step S5.

Alternatively, the step S5 'may be combined with the steps S1, S3, S2 and S4:
S5 'bending over one of the current conductors with the connecting means and the anchor part, in particular with one of the angle plates, whereupon the current conductor has a discharge section which is intended to extend along the side surface of the cell frame, in particular during step S4.

Preferably, step S5 'is performed in such a way that an arrester section of the first current arrester overlaps a arrester section of the second current arrester. Preferably, step S5 'is performed with an angle plate through which the connecting means is guided.

Preferably, the armature part for step S5 'on an internal thread for the connecting means. Preferably, the angle plate for step S5 'on a through hole for the connecting means. Preferably, the side surface of the cell frame merges with a radius of at least 0.5 mm in its main surface, particularly preferably to avoid kinking of the current conductor during step S5 '. Particularly preferably, during step S5 ', the connecting means is connected through the through-hole of the angle plate to the anchor part, wherein at least one or each of the current conductors of the two energy storage devices is arranged between the angle plate and the anchor part.

In particular, the first alternative can offer the advantage that the connection of the two current conductors can be effected essentially without the supply of thermal energy. The preferred development can offer the particular advantage that the connection of the two current conductors can be done without much equipment.

According to a second alternative of the method according to the sixth aspect of the invention, the steps S6 and S7 can be combined with the steps S1 and S3:
S6 supplying the contact element, which has an at least one angled angle plate with a tool opening, in the contact element receiving portion such that the angle plate is arranged in sections adjacent to at least one of the two current conductors, and that one of the gap-shaped recesses is accessible through the tool opening from the environment, and

S7 non-positive and / or cohesive connection of at least one of the two current conductor, which is arranged adjacent to the angle plate in sections, with the angle plate, the preferred development may provide in particular the advantage that the contact resistance between the contact elements and at least one of the current conductors in particular by their cohesive Connection is reduced compared to a frictional or non-positive connection.

According to a third alternative of the method according to the sixth aspect of the invention, the steps S5 and S8 can be combined with the steps S1 and S3:
S5 bending and / or arranging the first current collector and the second current collector such that a first arrester portion of the first current collector overlaps a second arrester portion of the second current collector,

S8 materially connecting the first Ableiterabschnitts with the second Ableiterabschnitt such that the contact element is formed by means of a mechanical or material connection of the first Stromableiters with the second current collector.

Preferably, the side surface of the cell frame merges with a radius of at least 0.5 mm in its main surface, particularly preferably to avoid kinking of the current conductor during step S5.

Preferably, step S5 takes place with an auxiliary tool, which is removed again after step S5.

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 schematically a cell frame according to the first aspect of the invention,

2 1 schematically shows a preferred embodiment of the cell frame with one of the contact elements and two energy storage devices,

3 1 schematically shows a further preferred embodiment of the cell frame with one of the contact elements and two energy storage devices,

4 schematically preferred embodiments of the cell frame,

5 1 schematically shows a further preferred embodiment of the cell frame with one of the contact elements and two energy storage devices,

6 schematically a further preferred embodiment of the cell frame,

7 Flowcharts for various methods for producing a battery with the cell frame,

8th schematically details of a preferred embodiment of the cell frame and a preferred embodiment of the contact element,

9 schematically a further view of the preferred embodiment according to 8th .

10 schematically a further view of the preferred embodiment according to 8th .

11 schematically a further view of the preferred embodiment according to 8th .

12 schematically details of a preferred embodiment of the cell frame and a further preferred embodiment of the contact element,

13 schematically a further view of the preferred embodiment according to 12 .

14 schematically a preferred embodiment of the contact element according to 8th ,

1 schematically shows a cell frame 1 according to the first aspect of the invention. The cell frame 1 has four frame elements which form the cell receiving section 4 at least partially limit.

In the left picture ( 1a ) is the main surface 2 arranged parallel to the leaf level and the side surface 3 perpendicular to the leaf level. The contact element receiving portion 5 is shown in dashed lines and incorporated in one of the frame members. The contact element receiving portion 5 is through the side surface 3 accessible.

Right ( 1b ) is a section of the cell frame 1 shown. Two cut the frame elements are shown in dashed lines. One of the slit-shaped depressions 7 is as a recess in the cell frame 1 , in particular in the illustrated upper frame member arranged. In the picture is the side surface 3 arranged parallel to the leaf level and the main surface 2 perpendicular to the leaf level.

2 schematically shows a preferred embodiment of the cell frame 1 with one of the contact elements 31 and two energy storage devices 21 . 21a , The energy storage devices 21 . 21a are shown in dashed lines, but not their current conductor 23 . 23a , That the current collector 23 . 23a in the picture of the cell frame 1 are spaced apart and not touching each other is only due to improved visibility. The electrode arrangements of the energy storage devices 21 . 21a are each at least partially from the cell receiving section 4 added.

For the formation of the contact element 31 have the current collector 23 . 23a one leg each, which is parallel to the side surface 3 extends. The legs overlap each other in sections. The overlapping portions of the legs are adjacent to the anchor portion 33 arranged. One of the anchor parts 33 is in one of the slit-shaped depressions 7 inserted. Preferably, the contact element 31 an angle sheet 32 on, which particularly preferably the protection of the upper Stromableiters 23 serves. With the lanyard 45 which by the current collector 23 . 23a into the anchor part 33 ranges, the angled legs can be positively or frictionally connected to each other. Preferably, the angled legs of the current conductor 23 . 23a in each case at least one U-shaped recess, which is the production of the contact element 31 facilitate, which for receiving the lanyard 45 serve.

Incidentally, the comments on 1 ,

3 schematically shows a further preferred embodiment of the cell frame 1 with one of the contact elements 31 and two energy storage devices 21 . 21a , The energy storage devices 21 . 21a are shown in dashed lines, but not their current conductor 23 . 23a , The electrode arrangements of the energy storage devices 21 . 21a are each at least partially from the cell receiving section 4 added.

The intersecting slit-shaped depressions 7 . 7a are within the top frame element of the cell frame 1 arranged and through the side surface 3 accessible. The slit-shaped depression 7a is also through the main surface 2 accessible, see 3a . 3b . 3c . 3d ,

The contact element 31 has a double angled bracket 32 on. The angle sheet 32 , in particular one leg each of the angle plate, overlaps the current conductors 23 . 23a sections. That the current collector 23 . 23a as well as the angle plate 32 in the picture of the cell frame 1 are spaced, is only due to improved visibility. The angle sheet 32 is with both current conductors 23 . 23a in particular cohesively connected, wherein the compound is marked with "S". The angle sheet 32 has at least one of the tool openings, which is not recognizable in the viewing direction. This allows the electrical contacts of the current conductor 23 . 23a be made with a particular pliers-like joining tool. In this case, a tool part through the mold opening 34 from the slit-shaped depression 7a be recorded.

The 3a . 3c show that the current conductor 23a between one of the legs of the angle plate 32 and the cell frame 1 is arranged. The 3b . 3d show that one of the legs of the angle plate 32 between the cell frame 1 and the current collector 23a is arranged.

3e . 3f show the angle sheet 32 and parts of the energy storage devices 21 . 21a only dashed. The angle sheet 32 has one of the tool openings 34 which, in particular during the step S5, serves to receive a connecting or joining tool. Preferably, the tool opening 34 punched. Preferably, the angle plate 32 several of the tool opening and 34 on, so that multiple electrical connections several parallel current paths between the energy storage devices 21 . 21a can form.

Incidentally, the comments on 1 ,

4 schematically shows preferred embodiments of the cell frame 1 ,

4a shows a first pair of two intersecting, slit-shaped depressions 7 . 7a and a second pair of two intersecting, columnar depressions 7b . 7c , each through the side surface 3 are accessible. The slit-shaped depressions 7a . 7c are additionally through the main surface 2 accessible. The embodiment is particularly suitable for the parallel connection of energy storage devices.

4b shows that the first slit-shaped depression 7 with two further slit-shaped depressions 7a . 7b is crossed. In 4c is the first slit-shaped depression 7 with three other slit-shaped depressions 7a . 7b . 7c crossed. The embodiments are particularly suitable for forming the electrical contact with a plurality of current paths, in particular if the current density per current path should be reduced.

Incidentally, the comments on 1 ,

5 schematically shows a further preferred embodiment of the cell frame 1 with one of the contact elements 31 and two energy storage devices 21 . 21a , The execution is similar to the design according to 2 , wherein the contact element 31 a cohesive connection of the current conductor 23 . 23a the energy storage devices 21 . 21a has, wherein the cohesive connection is marked with "S".

Preferably, the overlapping portions are the current conductors 23 . 23a welded. Preferably, the gap-shaped depression serves 7 for the removal of by-products in the production of the electrical contact or the contact element 31 during step S6. Alternatively, the gap-shaped depression serves 7 for receiving a heat sink during step S6.

Incidentally, the comments on 1 ,

6 schematically shows a further preferred embodiment of the cell frame 1 ,

In addition to the design according to 1 has the contact element receiving portion 5 a second pair of intersecting, slot-shaped recesses.

Next points the cell frame 1 at least one of the Spannmittelausnehmungen 10 on, through which a tensioning means can be guided, in particular for connecting a plurality of the cell frame during the mounting of a battery. Preferably, the cell frame 1 four of the clamping means recesses 10 on.

In addition, the cell frame points 1 at least one of Spannkörperausnehmungen 11 on which serves to receive an elastic clamping body. Preferably, the cell frame 12 opposite the Spannkörperausnehmungen 11 on.

7 shows flowcharts to various methods for producing an energy storage device with the cell frame.

7a shows a method for producing an energy storage arrangement with the steps S1, S2, S3 and S4, preferably with the steps S5 or S5 '. During step S1, one of the cell frames is made. During step S3, the cell frame is arranged between one of the current conductors of the first energy storage device and one of the current collectors of the second energy storage device such that the current conductor of the first energy storage device is arranged in sections adjacent to the current collector of the second energy storage device. During step S2, one of the anchor parts of the contact element is fed into the contact element receiving section. During step S4, the current conductor of the first energy storage device is electrically connected to the current collector of the second energy storage device with one of the connecting means such that the anchor part is acted upon by the connecting means with a normal force component in the direction of at least one of the current conductor.

Preferably, during step S5, the first current collector and the second current collector are angled or arranged in such a way that a conductor section of the first current collector overlaps a conductor section of the second current collector.

Preferably, during step S5 ', one of the current conductors is bent over with the connection means and the anchor part, in particular with one of the angle plates, whereupon the current conductor has a discharge section which is intended to extend along the side face of the cell frame, in particular during step S4.

7b shows an alternative method for producing an energy storage device with the steps S1, S3, S6 and S7. During step S1, one of the cell frames is made. During step S3, the cell frame is arranged between one of the current conductors of the first energy storage device and one of the current collectors of the second energy storage device such that the current conductor of the first energy storage device is arranged in sections adjacent to the current collector of the second energy storage device. During step S6, the contact element, which has an at least simply angled angle plate with a tool opening, is fed into the contact element receiving section such that the angle plate is arranged in sections adjacent to at least one of the two current conductors, and that one of the slit-shaped depressions through the tool opening from the environment is accessible. During step S7, at least one of the two current conductors, which is disposed in sections adjacent to the angle plate, connected to the angle plate non-positively and / or cohesively.

7c shows an alternative method for producing an energy storage device with the steps S1, S3, S5 and S8. During step S1, one of the cell frames is made. During step S3, the cell frame is arranged between one of the current conductors of the first energy storage device and one of the current collectors of the second energy storage device such that the current conductor of the first energy storage device is arranged in sections adjacent to the current collector of the second energy storage device. During step S5, the first current collector and the second current collector are angled or arranged in such a way that a conductor section of the first current collector overlaps a conductor section of the second current collector. During step S8, the first arrester section is connected to the second arrester section in such a material-locking manner that the contact element is formed by means of a mechanical or material connection of the first current conductor to the second current conductor.

8th schematically shows details of a preferred embodiment of the cell frame 1 and a preferred embodiment of the contact element 31 ,

The cell frame 1 has several Spannmittelausnehmungen 10 on. The contact element receiving portion 5 of the cell frame 1 is marked with dashed lines. The contact element receiving portion 5 has several of the slit-shaped depressions 7 , several of the projections 8th . 8a as well as several first connecting elements 13 on. The first fasteners 13 are formed as recesses or holes.

The contact element 31 points one of the angle plates 32 and one of the anchor parts 33 on. The angle sheet 32 is angled several times and has several of the second fasteners 36 on, which are formed as plastically deformable tongues. The second connecting elements 36 are configured, in each case one of the first connecting elements 13 intervene. By means of the first 13 and second connecting elements 36 can the angle plate 32 non-positively and / or positively within the contact element receiving portion 5 with the cell frame 1 get connected.

9 schematically shows a further view of the preferred embodiment according to 8th , In addition, the contact element 31 another of the angle plates 32a on. The second of the angle plates 32a is configured, together with the fasteners designed as screws 45 and the anchor part 33 , Thighs of the current collector 23 . 23a frictionally and electrically connect with each other. Otherwise, the explanations on 8th ,

10 schematically shows a further view of the preferred embodiment according to 8th , One of the angle plates 32 is with the first cell frame 1 connected. In the contact element receiving portion of the first cell frame 1 is the anchor part 33 added. Another of the angle plates 32a is provided with the adjacent second cell frame 1a to be connected. Otherwise, the explanations regarding the 8th and 9 ,

11 schematically shows a further view of the preferred embodiment according to 8th , The illustrated cell frames 1 and angle plates 32 are shown in section. The cell frames 1 have one or two clamping body recesses 11 on. In the Spannkörperausnehmungen 11 are clamping bodies 44 inserted. Pair of tensioning bodies 44 serve for the frictional support of current conductors. Otherwise, the explanations regarding the 8th to 10 ,

12 schematically shows details of a preferred embodiment of the cell frame 1 and a further preferred embodiment of the contact element 31 , The contact element 31 is integral with sections of the current collector 23 . 23a educated. Legs of the current collector 23 . 23a are materially connected to each other, preferably welded, more preferably with a laser for low heat input into the current conductor. The cohesive connection is marked with "S".

13 schematically shows a further view of the preferred embodiment according to 12 , The illustrated cell frames 1 and contact element sections 31 are shown in section. The cell frames 1 have one or two Spannkörperausnehmungen 11 on. In the Spannkörperausnehmungen 11 are clamping bodies 44 inserted. Pair of tensioning bodies 44 serve for the frictional support of current conductors. Otherwise, the explanatory notes to 12 ,

14 schematically shows a preferred embodiment of the contact element 31 according to 8th , The angle sheet 32a has a potential tap 35 on, preferably with internal thread, which serves the electrical connection of the energy storage device with a battery terminal or with a consumer.

LIST OF REFERENCE NUMBERS

1

cell borders

2

main area

3

side surface

4

Cell receiving portion

5

Contact element receiving portion

6

Recess of the cell frame

7, 7a

slit-shaped depression

8, 8a

head Start

10

Spannmittelausnehmung

11

Spannkörperausnehmung

13

first connecting element

21

Energy storage device

22

electrode assembly

23

Current conductor

31

contact element

32

Winkelblech

33

anchor part

34

mold opening

35

potential tap

36

second connecting element

37

contact sheet

41

external cell connection

42

Energy storage device

43

clamping means

44

tensioning body

45

connecting means

S

cohesive connection

Claims (14)

Cell frame ( 1 ) for supporting an energy storage device ( 21 ), in particular a lithium-ion cell, which has an electrochemical electrode arrangement ( 22 ) and at least one electrically connected current conductor ( 23 ), wherein the cell frame ( 1 ): a main surface ( 2 ) and at least one side surface ( 3 ) facing the main surface ( 2 ) and opposite the main surface ( 2 ) is inclined; a cell receiving section ( 4 ) for at least partially receiving the electrode arrangement ( 22 ); and a contact element receiving portion (FIG. 5 ) for receiving at least one contact element ( 31 ) for the electrical connection of the current conductor ( 23 ) with an external cell connection ( 41 ), when the electrode assembly ( 22 ) at least partially from the cell receiving section ( 4 ) is included; wherein the contact element receiving portion ( 5 ) by means of a recess ( 6 ) in the cell frame ( 1 ), which has two intersecting slit-shaped recesses ( 7 . 7a ) in the side surface ( 3 ) having. Cell frame ( 1 ) according to claim 1, wherein the contact element receiving portion ( 5 ) at least two projections ( 8th . 8a ) substantially perpendicular to the side surface (FIG. 3 ). Cell frame ( 1 ) according to one of the preceding claims, with at least one first connecting element ( 13 ), which within the contact element receiving portion ( 5 ) is arranged, and which for mechanical connection of the cell frame with one of the contact elements ( 31 ) is configured. Cell frame ( 1 ) according to one of the preceding claims, with a Spannmittelausnehmung ( 10 ) for receiving a clamping device ( 43 ) for the mechanical connection of the cell frame ( 1 ) with at least one further cell frame, wherein the longitudinal axis of the Spannmittelausnehmung ( 10 ) substantially perpendicular to the main surface ( 2 ) is aligned. Cell frame ( 1 ) according to one of the preceding claims, with a Spannkörperausnehmung ( 11 ) for at least partially receiving an elastic clamping body ( 44 ), wherein the Spannkörperausnehmung ( 11 ) through the main surface ( 2 ) is accessible. Cell frame ( 1 ) according to claim 5, further comprising a clamping body ( 44 ), which in the Spannkörperausnehmung ( 11 ) and is designed so that when he in the Spannkörperausnehmung ( 11 ) and the Electrode arrangement ( 22 ) at least partially from the cell receiving section ( 4 ), the current conductor ( 23 ) is applied with a normal force component. Cell frame ( 1 ) according to one of the preceding claims, wherein at least one of the slit-shaped depressions ( 7 . 7a ) through the side surface ( 3 ) and through the main surface ( 2 ) is accessible. Cell frame ( 1 ) according to one of the preceding claims, further comprising: the contact element ( 31 ), which from the cell frame ( 1 ) and configured to be separated from the contact element receiving portion (14) 5 ) can at least partially be included; and a mechanical connection means ( 45 ); and an anchor part ( 33 ); the anchor part ( 33 ) is configured, by means of the connecting means ( 45 ) with a normal force component in the direction of one of the current conductors ( 23 ) and is shaped such that, when the contact element ( 31 ) through the contact element receiving portion (FIG. 5 ) is at least partially accommodated in at least one of the slit-shaped recesses ( 7 . 7a ) intervenes. Cell frame ( 1 ) according to one of claims 1 to 7, further comprising: the contact element ( 31 ), which from the cell frame ( 1 ) and configured to be separated from the contact element receiving portion (14) 5 ) can at least partially be included; and an at least simply angled bracket ( 32 ) with a tool opening ( 34 ), wherein at least one of the slit-shaped depressions ( 7 . 7a ) through the tool opening ( 34 ) is accessible from the environment when the contact element ( 31 ) through the contact element receiving portion (FIG. 5 ) is at least partially included. Energy storage arrangement ( 42 ), comprising: a cell frame ( 1 ) according to any one of claims 1 to 7; and two energy storage devices ( 21 . 21a ); and a contact element ( 31 ), which from the cell frame ( 1 ) is detachable, and from the contact element receiving portion ( 5 ) of the cell frame ( 1 ) can at least partially be included; wherein the contact element ( 31 ) with a first arrester section of one of the current conductors ( 23 ) of the first energy storage device ( 21 ) and with a second arrester section of one of the current conductors ( 23a ) of the second energy storage device ( 21a ), wherein the first arrester portion and the second arrester portion are connected to each other mechanically or cohesively. Energy storage arrangement ( 42 ) comprising: two energy storage devices ( 21 . 21a ), in particular lithium-ion cells, each of which has an electrochemical electrode arrangement ( 22 ) and at least one electrically connected current conductor ( 23 ) exhibit; and a cell frame ( 1 ) according to one of claims 8 or 9, wherein the electrode arrangements of the energy storage devices ( 21 ) are each at least partially received in the cell receiving portion of the cell frame and by means of at least one of the contact elements ( 31 ) are electrically interconnected. Energy storage arrangement ( 42 ) according to claim 11, further comprising: a contact plate ( 37 ), which with the contact element ( 31 ) is electrically connectable; and a connecting lead which is electrically connected to the contact plate ( 37 ) is connectable. Method for producing a cell frame ( 1 ) with step S1 forms, in particular injection molding and / or machining, of the cell frame ( 1 ) with a main surface ( 2 ) and at least one side surface ( 3 ) facing the main surface ( 2 ) and opposite the main surface ( 2 ) is inclined; with a cell receiving section ( 4 ) for at least partially receiving an electrochemical electrode arrangement ( 22 ) an energy storage device ( 21 ); and with a contact element receiving portion ( 5 ) for receiving at least one contact element ( 31 ) for the electrical connection of a current conductor ( 23 ) of the energy storage device ( 21 ) with an external cell connection ( 41 ), when the electrode assembly ( 22 ) at least partially from the cell receiving section ( 4 ) is included; wherein the contact element receiving portion ( 5 ) by means of a recess ( 6 ) in the cell frame ( 1 ), which has two intersecting slit-shaped recesses ( 7 . 7a ) in the side surface ( 3 ) having. Method for producing an energy storage arrangement ( 42 ), with step S1 and with the steps S3 arranging the cell frame ( 1 ) between a first of the current conductors ( 23 ) a first of the energy storage devices ( 21 ) and a second of the current conductors ( 23a ) a second of the energy storage devices ( 21a ) S2 feeding an anchor part ( 33 ) one of the contact elements ( 31 ) in the contact element receiving portion ( 5 ), wherein the anchor part ( 33 ) is configured by means of a connecting means ( 45 ) of the contact element ( 31 ) with a normal force component in the direction of one of the current conductors ( 23 . 23a ), the anchor part ( 33 ) is shaped such that when the contact element ( 31 ) through the contact element receiving portion (FIG. 5 ) is at least partially included, in at least one of the slit-shaped depressions ( 7 . 7a ) and S4 electrically and / or non-positively connecting the first current conductor ( 23 ) with the second current collector ( 23a ) by mechanically connecting the connecting means ( 45 ) with the anchor part ( 33 ) such that the anchor part ( 33 ) by the connecting means ( 45 ) with a normal force component in the direction of at least one of the current conductors ( 23 . 23a ), bending one of the current conductors with the connection means and the anchor part, in particular with one of the angle plates, whereupon the current conductor has a discharge section which is intended to extend along the side face of the cell frame, in particular during step S4.

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