DE102021207360A1 - Battery cell, battery cell adapter, system with battery cell and battery cell adapter, and battery module cell holder - Google Patents

Abstract

Battery cell (10a, 10b) for a battery module cell holder (100), the battery cell (10a, 10b) having: - an anode, - an anode contact (32) electrically connected to the anode, - a cathode, - one electrically connected to the cathode Cathode contact (34), - a battery cell housing (20) with a base side (22), a cover side (26) opposite the base side (22) and an outer casing side (24) lying between the base side (22) and the cover side (26), wherein the outer shell side (24) forms at least one first fastening section (BAB1, BAB2, BAB3) for fastening the battery cell (10a, 10b) to a first counter-fastening section (BAM1) of the battery module cell holder (100), and wherein the outer shell side (24) of the Battery cell housing (20) forms an edge curve (RK) of a cut surface (SF) of a respective cut (S1, S2) along a battery axis (BA), the cut surface (S) resulting from the respective edge curve (RK) en t along the battery axis (BA) in the at least one first fastening section (BAB1, BAB2, BAB3) changed at least once.

Description

State of the art

A battery cell is an electrochemical energy store. Battery modules with multiple battery cells are used both in motor vehicles and in electronic devices, for example a cordless drill/driver. High demands are placed on the battery modules and/or battery cells in terms of reliability and/or safety and/or performance and/or service life. In a battery module, individual battery cells can be electrically connected in series and/or in parallel by means of battery cell connectors, for example electrical welded connectors, and can also be arranged in a battery housing.

Cylindrical lithium-ion battery cells such as 18650 battery cells, which have a diameter of 18 mm and a length of 65 mm, are accommodated in particular in a battery cell holder with cylindrical accommodation openings. However, particularly in extreme situations, such as an accident, high mechanical forces can act on a battery module, the battery cell holder and the individual battery cells, which can lead to a movement of the battery cells relative to one another and/or to a movement of the battery cells and the battery housing relative to one another. An electrical connection of the battery cells can be damaged here and, for example, change, in particular reduce, the performance of the battery cells or the battery module.

Disclosure of Invention

The present invention shows a battery cell according to the features of claim 1, a battery cell adapter according to the features of claim 9, a system with a battery cell adapter and a battery cell according to the features of claim 17 and a battery module cell holder according to the features of claim 18.

Further features and details of the invention result from the dependent claims, the description and the drawings. Features and details that are described in connection with the battery cell according to the invention also apply, of course, in connection with the battery cell adapter according to the invention, the system according to the invention and the battery module cell holder according to the invention and vice versa, so that the disclosure of the individual aspects of the invention is always referred to alternately or . can be.

According to a first aspect, the present invention shows a battery cell for a battery module cell holder, the battery cell having an anode arranged in a battery cell housing, and an anode contact electrically connected to the anode for arranging a first electrical contact means for transmitting an electrical signal, and in the battery cell housing arranged cathode, and having a cathode contact electrically connected to the cathode for arranging a second electrical contact means for transmitting an electrical signal. Furthermore, the battery cell has the battery cell housing with a base side, a cover side opposite the base side and an outer jacket side lying between the base side and the cover side, with a battery axis of the battery cell extending in a direction from the cover side to the base side. Furthermore, the outer shell side of the battery cell housing forms at least one first fastening section for arranging on a first counter-fastening section of the battery module cell holder for fastening the battery cell, and wherein the outer shell side of the battery cell housing forms an edge curve of a cut surface of a respective section along the battery axis, with the respective edge curve resulting sectional area along the battery axis changed at least once in the at least one first attachment section.

The battery cell is in particular a lithium-ion battery cell. The battery cell is in particular for a vehicle, in particular a motor vehicle. For example, the battery cell is for vehicles such as scooters, rickshaws and cars, or utility items such as lawn mowers. Furthermore, the battery cell is in particular for an electric motor-driven tool, in particular a hand tool.

In particular, the outer jacket side connects the base side of the battery cell housing to the cover side of the battery cell housing. In particular, the anode contact can form at least part of the base and/or the cover. Furthermore, the cathode contact can in particular form at least part of the base and/or cover. The anode contact preferably forms at least part of the cover side and the cathode contact forms at least part of the base side, or vice versa.

A straight cut in particular is to be understood as a cut along the battery axis. The straight cut is in particular a horizontal cut. Furthermore, the section is in particular perpendicular or essentially perpendicular to the battery axis. The outer shell side of the battery cell housing forms for a respective In each case, an edge curve is cut, with a cutting surface for the respective cut being determined by the edge curve. In other words, the edge curve can specify a surface which is to be understood in particular as the intersection surface.

The battery cell housing can have a polymer and/or a metal, for example. In particular, the battery cell housing is made of a polymer and/or metal.

Advantageously, because according to the invention the cutting surface resulting from the respective edge curve along the battery axis changes at least once in the at least one first fastening section, the battery cell can be arranged particularly advantageously with the first fastening section on a first counter-fastening section of a receiving space of a base body of a battery module cell holder . The base body, in particular the receiving space of the base body, of the battery module cell holder is preferably designed to be complementary or essentially complementary to the battery cell. In this way, the battery cell can also be particularly advantageously fastened in the receiving space of the base body of the battery module cell holder. In addition to fastening the battery cell in the receiving space, the battery cell can be centered in the receiving space of the base body by means of the fastening section according to the invention. By centering the battery cell in the accommodating space of the base body, the battery cell can also be attached particularly advantageously in the accommodating space and furthermore the anode contact and/or the cathode contact of the battery cell can be contacted particularly advantageously. The arrangement of the first fastening section of the battery cell on a first counter-fastening section of a receiving space of a battery module cell holder is also, in particular, a material and/or non-positive and/or form-fitting arrangement. Thus, the battery cell can be attached to the base body of the battery module cell holder in a materially and/or non-positively and/or positively locking manner. The arrangement of the first fastening section of the battery cell on the first counter-fastening section of the battery module cell holder is preferably only a non-positive and/or positive arrangement. A battery cell can thus be changed particularly easily. The non-positive and form-fitting arrangement of the battery cell in the receiving space of the base body of the battery module cell holder can take place in particular by a rotary movement. For example, the outer casing side of the battery cell housing can form a thread, in particular an internal and/or external thread, along the battery axis, with a receiving space of a base body of a battery module cell holder correspondingly having an internal and/or external thread. A battery cell can thus be fastened in the receiving space in a non-positive and positive manner by means of a rotary movement, in particular a screwing movement. Furthermore, the non-positive arrangement of the battery cell in the receiving space of the base body of the battery module cell holder can take place in particular by a translational movement of the battery cell into the receiving space of the base body of the battery module cell holder. For example, the battery cell can be conical in the first fastening section and the receiving space of the main body of the battery module cell holder is also correspondingly conical in the first counter-fastening section. A battery cell can thus be fastened in a force-fitting manner in a particularly simple manner by pushing the battery cell as a translatory movement into the receiving space.

It can be advantageous if, in a battery cell according to the invention, the section surface resulting from the respective edge curve along the battery axis also changes in at least one second fastening section of the outer casing side that is different from the first fastening section, preferably in at least one second fastening section of the outer casing side that is different from the first fastening section changed and changed to a third attachment portion of the outer shell side different from the first attachment portion and second attachment portion. In other words, the battery cell, in particular the outer casing side of the battery cell, can form or have a plurality of fastening sections according to the invention. The multiple attachment sections are in particular at least two attachment sections. The plurality of attachment sections can be distributed along the battery axis, in particular distributed and spaced apart from one another. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. For example, the battery cell can have a first fastening section in the area of the base side of the battery cell housing and a further or second fastening section in the area of the cover side of the battery cell housing. The plurality of fastening sections are preferably of identical or essentially identical design.

Advantageously, in a battery cell according to the invention, the shape of the cut surface can change at least once along the battery axis in the first fastening section, in particular change at least twice, preferably change more than twice. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Changing the shape of the cut surface along the battery axis in the first attachment section can also be understood as changing the shape of the edge curve. In particular, changing the shape of the cut surface or the shape of the edge curve should not be understood as a scaling of the shape of the cut surface or the shape of the edge curve. For example, changing the shape of the sectional surface once along the battery axis in the attachment portion may be changed from a circular surface as a sectional surface to a polygonal surface such as a square surface. Furthermore, for example, changing the shape of the cut surface or edge curve twice along the battery axis in the fastening section can mean changing from a first shape to a second shape that is different from the first shape and changing from the second shape to one of the first shape and /or second shape different third shape, in particular the first shape and the third shape are the same or substantially the same.

With particular advantage, in a battery cell according to the invention, the surface area of the cut surface along the battery axis in the first fastening section can change, in particular increase or decrease, with the shape of the cut surface along the battery axis in the first fastening section preferably remaining the same or essentially the same. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Preferably, the shape of the cut surface along the battery axis in the first attachment portion remains the same or substantially the same, with the surface area of the cut surface in the first attachment portion decreasing along the battery axis from the top side to the base side. For example, the battery cell or the battery cell housing can be conical. Furthermore, it is also conceivable that the battery cell or the battery cell housing is configured in the shape of a pyramid, in particular in the shape of a truncated pyramid. In this way, twisting of the battery cell can also be prevented in a particularly advantageous manner.

According to a further preferred embodiment, in a battery cell according to the invention, the surface area of the cut surface along the battery axis in the first fastening section can change abruptly at least once, preferably change abruptly at least twice, very preferably change abruptly at least three times. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Here, in particular, the shape of the cut surface or the edge curve along the battery axis in the first fastening section can remain the same. For example, the battery cell can be designed in steps in the attachment section for a sudden change in the surface area of the cut surface.

It can be advantageous if, in a battery cell according to the invention, the battery cell housing in the first fastening section has at least one projection formed at least partially radially around the battery axis on the outer shell side of the battery cell housing, with the projection preferably completely surrounding the battery axis. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Furthermore, the battery cell housing can have a plurality of projections formed radially around the battery axis on the outer casing side of the battery cell housing in the first fastening section. The multiple projections are in particular at least two projections. Furthermore, the plurality of projections can be offset from one another in particular along the battery axis and/or radially around the battery axis.

Advantageously, in a battery cell according to the invention, the shape of the cut surface along the battery axis in the first fastening section can twist about the battery axis, in particular twist at least partially continuously about the battery axis. The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder. In particular, the shape of the cut surface along the battery axis in the first fastening section remains the same or essentially the same. For example, the battery cell housing of the battery cell can in particular have a thread in the first fastening section, the thread preferably being an external thread at least in sections and/or an internal thread at least in sections. Thus, the respective battery cell can advantageously be releasably fastened particularly advantageously by a rotary movement in a receiving space.

In a battery cell according to the invention, the anode contact and/or the cathode contact can be arranged with particular advantage in the first fastening section, in particular in the first fastening section on the outer casing side of the battery housing, in which the section surface resulting from the respective edge curve changes at least once along the battery axis . The battery cell can thus be fastened and/or centered particularly advantageously along the battery axis in a correspondingly designed receiving space of a base body of a battery module cell holder with the aid of the anode contact and/or the cathode contact. The anode and/or cathode contact arranged in the first attachment section, in particular in the first attachment section on the outer shell side of the battery housing, is formed in particular by the battery housing. In other words, the battery housing can be designed to be electrically conductive at least in sections in order to form the anode and/or cathode contact. For example, a projection formed in the first fastening section at least partially radially around the battery axis on the outer shell side of the battery cell housing can form an anode and/or cathode contact for fastening and/or centering the battery cell in a receiving space of a base body of a battery module cell holder.

According to a second aspect, the present invention shows a battery cell adapter for a battery module cell holder, wherein the battery cell adapter has an adapter housing with an arrangement space for arranging at least one battery cell. The adapter housing has a base, a cover opposite the base, and an outer jacket side located between the base and the cover, with an adapter axis extending in a direction from the cover to the base. The outer shell side of the adapter housing forms at least one first fastening section for arranging on a first counter-fastening section of the battery module cell holder for fastening the battery cell adapter, with the outer shell side of the adapter housing forming an edge curve of a cut surface of a respective cut along the adapter axis, the edge curve formed by the respective edge curve resulting sectional area along the adapter axis changed at least once in the at least one first attachment section.

In particular, the outer jacket side connects the base side of the adapter housing to the cover side of the adapter housing.

The battery cell adapter is in particular for a vehicle, in particular a motor vehicle. For example, the battery cell adapter is for vehicles such as scooters, rickshaws and cars, or utility items such as lawn mowers. Furthermore, the battery cell adapter is in particular for an electric motor-driven tool, in particular a hand tool.

In particular, a straight cut is to be understood as a cut along the adapter axis. The straight cut is in particular a horizontal cut. Furthermore, the section is in particular perpendicular or essentially perpendicular to the adapter axis. The outer casing side of the adapter housing forms an edge curve for a respective cut, with a cut surface for the respective cut being determined by the edge curve. In other words, the edge curve can specify a surface which is to be understood in particular as the intersection surface.

The adapter housing can have a polymer and/or a metal, for example. In particular, the adapter housing is made of a polymer and/or metal. Furthermore, the adapter housing can be at least partially injection molded and/or produced by means of an additive manufacturing process, for example 3D printing. The adapter housing is preferably made of aluminum. With an adapter housing made of aluminum, heat can be dissipated in a particularly advantageous manner, and the adapter housing is also mechanically particularly stable.

The at least one battery cell is arranged in particular in the arrangement space of the adapter housing in a non-positive and/or material and/or form-fitting manner. The cohesive arrangement of the at least one battery cell in the arrangement space is in particular gluing of the battery cell in the arrangement space of the adapter housing. Thus, the battery cell can be arranged in the arrangement space particularly securely. The non-positive and/or form-fitting arrangement of the at least one battery cell in the arrangement space takes place in particular by a rotary movement, in particular a screwing movement. For example, the battery cell, in particular the battery cell housing, can have a thread.

It is also conceivable that, in particular, a plurality of battery cells are arranged in the arrangement space. The multiple battery cells are in particular at least two battery cells.

Advantageously, the fact that, according to the invention, the sectional area resulting from the respective edge curve along the adapter axis changes at least once in the at least one first fastening section, the battery cell adapter can be arranged particularly advantageously with the first fastening section on a first counter-fastening section of a receiving space of a base body of a battery module cell holder . The base body, in particular the receiving space of the base body, of the battery module cell holder is preferably designed to be complementary or essentially complementary to the battery cell adapter. The battery cell adapter can thus be particularly advantageously fastened in the receiving space of the main body of the battery module cell holder. In addition to fastening the battery cell adapter in the receiving space, the battery cell adapter can be centered in the receiving space of the base body by means of the fastening section according to the invention. By centering the battery cell adapter in the accommodating space of the base body, the battery cell adapter can be or will be fastened in the accommodating space in a particularly advantageous manner. Furthermore, a battery cell arranged in the arrangement space of the battery cell adapter can thus be arranged particularly advantageously in a battery module cell holder by means of the battery cell adapter, and in particular the anode contact and/or the cathode contact of the battery cell can be contacted particularly advantageously. The arrangement of the first fastening section of the battery cell adapter on a first counter-fastening section of a receiving space of a battery module cell holder is also in particular a material and/or non-positive and/or form-fitting arrangement. The battery cell adapter can thus be fastened to the base body of the battery module cell holder in a materially and/or non-positively and/or positively locking manner. The arrangement of the first fastening section of the battery cell adapter on the first counter-fastening section of the battery module cell holder is preferably only a non-positive and/or positive arrangement. A battery cell adapter can thus be changed particularly easily. The non-positive and form-fitting arrangement of the battery cell adapter in the receiving space of the main body of the battery module cell holder can take place in particular by a rotary movement. For example, the outer casing side of the adapter housing can form a thread, in particular an internal and/or external thread, along the adapter axis, with a receiving space of a base body of a battery module cell holder correspondingly having an internal and/or external thread. A battery cell adapter can thus be fastened in the receiving space in a non-positive and positive manner by means of a rotary movement, in particular a screwing movement. Furthermore, the non-positive arrangement of the battery cell adapter in the receiving space of the main body of the battery module cell holder can take place in particular by a translational movement of the battery cell adapter into the receiving space of the main body of the battery module cell holder. For example, the battery cell adapter can be conical in the first fastening section and the receiving space of the main body of the battery module cell holder is also correspondingly conical in the first counter-fastening section. A battery cell adapter and thus, for example, also a battery cell arranged in the arrangement space of the battery cell adapter can thus be fastened in a force-fitting manner in a particularly simple manner by pushing the battery cell into the receiving space.

It can be advantageous if, in a battery cell adapter according to the invention, the section surface resulting from the respective edge curve along the adapter axis also changes in at least one second fastening section of the outer casing side that is different from the first fastening section, preferably in at least one second fastening section of the outer casing side that is different from the first fastening section changed and changed to a third attachment portion of the outer shell side different from the first attachment portion and second attachment portion. In other words, the battery cell adapter, in particular the outer casing side of the adapter housing of the battery cell adapter, can form or have a plurality of fastening sections according to the invention. The multiple attachment sections are in particular at least two attachment sections. The several fastening sections can be distributed along the adapter axis. Thus, the battery cell adapter, in particular the battery cell adapter with at least one battery cell accommodated in the arrangement space of the battery cell adapter, can be particularly advantageously attached and/or centered along the adapter axis in a correspondingly designed accommodation space of a base body of a battery module cell holder. For example, the battery cell adapter can have a first fastening section in the area of the base side of the adapter housing and a further or second fastening section in the area of the cover side of the adapter housing. The plurality of fastening sections are preferably of identical or essentially identical design.

Advantageously, in a battery cell adapter according to the invention, the shape of the cut surface along the adapter axis in the change the first fastening section at least once, in particular change it at least twice, preferably change it more than twice. The battery cell adapter can thus be fastened and/or centered particularly advantageously along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Changing the shape of the cut surface along the adapter axis in the first attachment section can also be understood as changing the shape of the edge curve. In particular, changing the shape of the cut surface or the shape of the edge curve should not be understood as a scaling of the shape of the cut surface or the shape of the edge curve. For example, changing the shape of the sectional surface once along the adapter axis in the attachment portion may be changing from a circular surface as a sectional surface to a polygonal surface such as a square surface. Furthermore, for example, changing the shape of the cut surface or edge curve twice along the adapter axis in the fastening section can mean changing from a first shape to a second shape that differs from the first shape and changing from the second shape to one of the first shape and /or second shape different third shape, in particular the first shape and the third shape are the same or substantially the same.

With particular advantage, in a battery cell adapter according to the invention, the surface area of the cut surface along the adapter axis in the first fastening section can change, in particular increase or decrease, with the shape of the cut surface along the adapter axis in the first fastening section preferably remaining the same or essentially the same. The battery cell adapter can thus be fastened and/or centered particularly advantageously along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder. The shape of the cut surface along the adapter axis preferably remains the same or essentially the same in the first attachment section, with the surface area of the cut surface in the first attachment section decreasing along the adapter axis from the top side to the base side. For example, the battery cell adapter or the adapter housing can be designed conically. Furthermore, it is also conceivable that the battery cell adapter or the adapter housing is configured in the shape of a pyramid, in particular in the shape of a truncated pyramid. In this way, twisting of the battery cell adapter can also be prevented in a particularly advantageous manner.

According to a further preferred embodiment, in a battery cell adapter according to the invention, the surface area of the cut surface along the adapter axis in the first fastening section can change abruptly at least once, preferably change abruptly at least twice, most preferably change abruptly at least three times. The battery cell adapter can thus be fastened and/or centered particularly advantageously along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Here, in particular, the shape of the cut surface or the edge curve along the adapter axis can remain the same in the first fastening section. For example, the battery cell adapter can be designed in steps in the attachment section for a sudden change in the surface area of the cut surface.

It can be advantageous if, in a battery cell adapter according to the invention, the adapter housing in the first fastening section has at least one projection formed at least partially radially around the adapter axis on the outer casing side of the adapter housing, with the projection preferably completely surrounding the adapter axis. The battery cell adapter can thus be fastened and/or centered particularly advantageously along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder. Furthermore, the adapter housing can have a plurality of projections formed radially around the adapter axis on the outer casing side of the adapter housing in the first fastening section. The multiple projections are in particular at least two projections. Furthermore, the plurality of projections can be offset from one another in particular along the adapter axis and/or radially around the adapter axis.

Advantageously, in a battery cell adapter according to the invention, the shape of the cut surface along the adapter axis in the first fastening section can rotate about the adapter axis, in particular rotate at least partially continuously about the adapter axis. The battery cell adapter can thus be fastened and/or centered particularly advantageously along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder. In particular, the shape of the cut surface along the adapter axis in the first fastening section remains the same or essentially the same. For example, the adapter housing of the battery cell adapter can in particular have a thread in the first fastening section, the thread preferably being an external thread at least in sections and/or an internal thread at least in sections. Thus, the respective battery cell adapter advantageously be releasably attachable by a rotary movement in a receiving space.

A battery cell adapter according to the invention can particularly advantageously have an electrically conductive anode contact contacting element for electrically connecting an anode contact of the battery cell to an electrode contact of a further battery cell and/or an electrically conductive cathode contact contacting element for electrically connecting a cathode contact of the battery cell to an electrode contact of a further battery cell. The battery cell adapter can thus be particularly advantageously fastened and/or centered along the adapter axis in a correspondingly designed receiving space of a base body of a battery module cell holder using the anode contact contacting element and/or the cathode contact contacting element. The adapter housing can be designed to be electrically conductive at least in sections in order to form the anode contact contacting element and/or the cathode contact contacting element.

The battery cell adapter according to the second aspect of the invention thus has the same advantages as have already been described for the battery cell according to the first aspect of the invention.

According to a third aspect, the present invention shows a system comprising a battery cell adapter according to the invention and at least one battery cell, wherein the at least one battery cell is arranged in the arrangement space of the adapter housing of the battery cell adapter, wherein in particular the arranged battery cell is a cylindrical battery cell or a cuboid battery cell.

The system according to the third aspect of the invention thus has the same advantages as have already been described for the battery cell according to the first aspect of the invention or the battery cell adapter according to the second aspect of the invention.

According to a fourth aspect, the present invention shows a battery module cell holder, wherein the battery module cell holder comprises a base body with at least two receiving spaces, wherein the at least two receiving spaces each have at least one first counter-fastening section for fastening, in particular for releasably fastening, a battery cell according to the invention having a first fastening section and /or for fastening, in particular for releasably fastening, a battery cell adapter according to the invention having a first fastening section.

The battery module cell holder is in particular for a vehicle, in particular a motor vehicle. For example, the battery module cell holder is for vehicles such as scooters, rickshaws and cars, or utility items such as lawn mowers. Furthermore, the battery module cell holder is in particular for an electric motor-driven tool, in particular a hand tool.

The main body of the battery module cell holder can have a polymer and/or a metal, for example. In particular, the base body is made of a polymer and/or metal. Furthermore, the base body can be at least partially injection molded and/or produced by means of an additive manufacturing process, for example 3D printing. The base body is preferably made of aluminum. With a base body made of aluminum, heat can be dissipated in a particularly advantageous manner, and the base body is also mechanically particularly stable.

It can be advantageous if, in a battery module cell holder according to the invention, at least the respective first counter-fastening section of the two receiving spaces of the base body is designed in such a way that the respective battery cell and/or the respective battery cell adapter can be moved in the respective receiving space by a rotary movement and/or a translatory movement are releasably attachable. For example, an outer casing side of a battery cell housing of the battery cell and/or an outer casing side of an adapter housing of a battery cell adapter can have or form a thread. The respective first counter-fastening section of the at least two receiving spaces can also have or form a correspondingly designed thread for fastening, in particular for detachable fastening, a battery cell and/or a battery cell adapter by a rotary movement.

The battery module cell holder according to the fourth aspect of the invention thus has the same advantages as have already been described for the battery cell according to the first aspect of the invention or the battery cell adapter according to the second aspect of the invention or the system according to the third aspect of the invention.

Further measures improving the invention result from the following description of some exemplary embodiments of the invention, which are shown schematically in the figures. All features and/or advantages resulting from the claims, the description or the drawings, including structural details, spatial arrangements and process steps, can be essential to the invention both individually and in various combinations. It should be noted that the figures are only descriptive and are not intended to limit the invention in any way.

• 1 eine Ausführungsform einer erfindungsgemäßen Batteriezelle,
• 2 Schnitte durch die in 1 dargestellte Batteriezelle,
• 3 eine weitere Ausführungsform einer erfindungsgemäßen Batteriezelle,
• 4 Schnitte durch die in 3 dargestellte Batteriezelle,
• 5 eine weitere Ausführungsform einer erfindungsgemäßen Batteriezelle,
• 6 Schnitte durch die in 5 dargestellte Batteriezelle,
• 7 eine Ausführungsform eines erfindungsgemäßen Batteriezellenadapters,
• 8 Schnitte durch den in 7 dargestellten Batteriezellenadapter,
• 9 eine weitere Ausführungsform eines erfindungsgemäßen Batteriezellenadapters,
• 10 Schnitte durch den in 9 dargestellten Batteriezellenadapter,
• 11 eine Ausführungsform eines erfindungsgemäßen Batteriemodulzellenhalters,
• 12 eine weitere Ausführungsform eines erfindungsgemäßen Batteriemodulzellenhalters, und
• 13 einen Batteriemodulzellenhalter mit Batteriezellen.

They show schematically:

• 1 an embodiment of a battery cell according to the invention,
• 2 cuts through the in 1 battery cell shown,
• 3 a further embodiment of a battery cell according to the invention,
• 4 cuts through the in 3 battery cell shown,
• 5 a further embodiment of a battery cell according to the invention,
• 6 cuts through the in 5 battery cell shown,
• 7 an embodiment of a battery cell adapter according to the invention,
• 8th cuts through the in 7 illustrated battery cell adapter,
• 9 a further embodiment of a battery cell adapter according to the invention,
• 10 cuts through the in 9 illustrated battery cell adapter,
• 11 an embodiment of a battery module cell holder according to the invention,
• 12 a further embodiment of a battery module cell holder according to the invention, and
• 13 a battery module cell holder with battery cells.

In the following figures, identical reference symbols are used for the same technical features, also from different exemplary embodiments.

1 shows a side view of an embodiment of a battery cell 10a according to the invention. The battery cell 10a has an anode arranged in a battery cell housing 20, an anode contact 32 electrically connected to the anode for arranging a first electrical contact means for transmitting an electrical signal, a cathode arranged in the battery cell housing 20, and a cathode contact 34 electrically connected to the cathode for arranging a second electrical contact means for transmitting an electrical signal. The battery cell housing 20 comprises a base side 22, a cover side 26 opposite the base side 22 and an outer casing side 24 lying between the base side 22 and the cover side 26, with a battery axis BA of the battery cell 10a extending in a direction from the cover side 26 to the base side 22. Furthermore, the outer casing side 24 has at least one first fastening section BAB1 for arranging on a first counter-fastening section BAM1 of a battery module cell holder 100 for fastening the battery cell 10a, and the outer casing side 24 of the battery cell housing 20 has an edge curve RK of a cut surface SF of a respective cut S1, S2 forms along the battery axis BA. According to the invention, the section surface SF resulting from the respective edge curve RK changes at least once along the battery axis BA in the at least one first fastening section BAB1. In 1 For example, the battery cell 10a or the battery cell housing 20 is conical with the outer casing side 24 .

2 shows in a plan view in the left figure an edge curve RK resulting from a cut S1 and an associated cut surface SF of the in 1 illustrated embodiment of the battery cell 10a. Further revealed 2 in a top view in the right figure the edge curve RK resulting from a section S2 as well as an associated section surface SF of the in 1 illustrated embodiment of the battery cell 10a. Out 2 it can be seen that, according to the invention, the section surface SF resulting from the respective edge curve RK changes along the battery axis BA in the at least one first fastening section BAB1. In particular, the surface area of the cut surface SF decreases along the battery axis BA in a direction from the cover side 26 to the base side 22 in the first attachment section BAB1, with the shape of the cut surface SF along the battery axis BA in the first attachment section BAB1 being the same or substantially the same remains the same. The shape of the cut surface is circular or essentially circular here, for example.

3 shows a side view of a further embodiment of a battery cell 10a according to the invention, as already shown in FIG 1 is described, in contrast to the 1 described embodiment, the surface area of the cut surface SF changes twice abruptly along the battery axis BA in the first fastening section BAB1. In the first fastening section BAB1, the battery cell housing 20 has two projections formed radially around the battery axis BA on or through the outer casing side 24 of the battery cell housing 20 . The two projections are ver radially around the battery axis BA sets arranged to each other. Furthermore, in contrast to the in 1 In the illustrated embodiment, the cathode contact 34 is arranged or formed in the first attachment section BAB1 on the outer shell side 24 of the battery housing 20, in which the section surface SF resulting from the respective edge curve RK changes at least once along the battery axis BA.

4 shows in a plan view in the left figure an edge curve RK resulting from a cut S1 and an associated cut surface SF of the in 3 illustrated embodiment of the battery cell 10a. Further revealed 4 in a top view in the right figure the edge curve RK resulting from a section S2 as well as an associated section surface SF of the in 3 illustrated embodiment of the battery cell 10a.

5 shows a side view of a further embodiment of a battery cell 10a according to the invention, as already shown in FIG 1 is described, in contrast to the 1 embodiment shown, the shape of the cut surface SF along the battery axis BA in the first fastening section BAB1 and in a second fastening section BAB2 is twisted about the battery axis BA. As shown by way of example, the battery cell housing 20 has a thread in each of the first fastening section BAB1 and in a second fastening section BAB2. The two fastening sections BAB1 and BAB2 are also distributed along the battery axis BA and arranged at a distance from one another.

6 shows in a plan view in the left figure an edge curve RK resulting from a cut S1 and an associated cut surface SF of the in 5 illustrated embodiment of the battery cell 10a. Further disclosed 6 in a top view in the right figure the edge curve RK resulting from a section S2 as well as an associated section surface SF of the in 5 illustrated embodiment of the battery cell 10a.

7 shows an embodiment of a battery cell adapter 60a according to the invention for a battery module cell holder 100 in a vertical section, the battery cell adapter 60a having an adapter housing 70 with an arrangement space 78 for arranging at least one battery cell 10a, the adapter housing 70 having a base side 72, a cover side 76 opposite the base side 72, and has an outer casing side 74 lying between the base side 72 and the cover side 76 . An adapter axis AA extends in a direction from the cover side 76 to the base side 72, the outer casing side 74 forming at least one first fastening section BAA1 for arranging on a first counter-fastening section BAM1 of the battery module cell holder 100 for fastening the battery cell adapter 60a. The outer casing side 74 of the adapter housing 70 forms an edge curve RK of a cut surface SF of a respective section along the adapter axis AA, with the cut surface SF resulting from the respective edge curve RK along the adapter axis AA changing at least once in the at least one first fastening section BAA1. In 7 For example, the battery cell adapter 60a or the adapter housing 70 is conical with the outer jacket side 74 .

8th shows in a plan view in the left figure an edge curve RK resulting from a cut S1 and an associated cut surface SF of the in 7 illustrated embodiment of the battery cell adapter 60a. Further revealed 8th in a top view in the right figure the edge curve RK resulting from a section S2 as well as an associated section surface SF of the in 7 illustrated embodiment of the battery cell adapter 60a. Out 8th it can be seen that, according to the invention, the section surface SF resulting from the respective edge curve RK changes along the adapter axis AA in the at least one first fastening section BAA1. In particular, the surface area of the cut surface SF decreases along the adapter axis AA in a direction from the cover side 76 to the base side 72 in the first attachment section BAA1, with the shape of the cut surface SF along the adapter axis AA in the first attachment section BAA1 being the same or substantially the same remains the same. The shape of the cut surface is circular or essentially circular here, for example.

8th shows a further embodiment of a battery cell adapter 60a according to the invention for a battery module cell holder 100 in a vertical section as already shown in FIG 7 has been described, in contrast to the 7 described embodiment of the battery cell adapter 60a has at least one projection.

9 discloses a further embodiment of a battery cell adapter 60a according to the invention for a battery module cell holder 100 in a vertical section as already mentioned 7 is described, in contrast to the 7 illustrated embodiment of the battery cell adapter 60a twisted the shape of the cut surface SF along the adapter axis AA in the first attachment section BAA1 and in a second attachment section BAA2 around the adapter axis AA. As exemplified, the adapter housing 70 has the first attachment BAA1 and in a second fastening section BAA2 each cut a thread. The two fastening sections BAA1 and BAA2 are also distributed along the adapter axis AA and arranged at a distance from one another.

11 and 12 each disclose an embodiment of a battery module cell holder 100 according to the invention in a vertical section. The battery module cell holder 100 each comprises a base body 110 with at least two receiving spaces 120a, 120b, the at least two receiving spaces 120a, 120b each having at least one first counter-fastening section BAM1 for fastening a battery cell 10a, 10b (not shown) having a first fastening section BAB1, BAB2 , BAB3 and/or for attaching a battery cell adapter 60a, 60b (not shown) having a first attachment section BAA1, BAA2, BAA3. In 11 For example, the receiving space 120a and the receiving space 120b are each conical. In 11 For example, the receiving space 120a and the receiving space 120b are each conical. In 12 the respective first counter-fastening section BAM1 of the at least two receiving spaces 120a, 120b has a thread or forms a thread.

13 shows an example of a battery module cell holder 100 according to the invention as already mentioned 11 is described. In the conical receiving spaces 120a, 120b, a conical battery cell 10a or 10b is fastened, preferably releasably fastened, in the first fastening section BAB1. The battery cells 10a, 10b can thus be fastened in a force-fitting manner in a particularly simple manner by being pushed as a translational movement into the receiving space.

Claims (19)

Battery cell (10a, 10b) for a battery module cell holder (100), the battery cell (10a, 10b) having: - an anode arranged in a battery cell housing (20), - an anode contact (32) electrically connected to the anode for arranging a first electrical contact means for transmitting an electrical signal, - a cathode arranged in the battery cell housing (20), - a cathode contact (34) electrically connected to the cathode for arranging a second electrical contact means for transmitting an electrical signal, - the battery cell housing (20) with a base side (22), a cover side (26) opposite the base side (22) and an outer casing side (24) lying between the base side (22) and the cover side (26), with a battery axis (BA ) of the battery cell (10a, 10b) in a direction from the cover side (26) to the base side (22), the outer casing side (24) having at least one first fastening section (BAB1, BAB2, BAB3) for arranging on a first counter-fastening section (BAM1) of the battery module cell holder (100) for fastening the battery cell (10a, 10b), and wherein the outer casing side (24) of the battery cell housing (20) has an edge curve (RK) of a cut surface (SF) of a respective cut (S1, S2) along the battery axis (BA), the section surface (SF) resulting from the respective edge curve (RK) along the battery axis (BA) in the at least one first fastening section (BAB1, BAB2, BAB3) being at least once ve edges. Battery cell (10a, 10b) after claim 1 , characterized in that the section surface (SF) resulting from the respective edge curve (RK) along the battery axis (BA) is additionally in at least one second fastening section (BAB1, BAB2, BAB3) which differs from the first fastening section (BAB1, BAB2, BAB3) changed on the outer shell side (24), preferably in at least one second fastening section (BAB1, BAB2, BAB3) of the outer shell side (24) which is different from the first fastening section (BAB1, BAB2, BAB3) and in one changed from the first fastening section (BAB1, BAB2, BAB3) and second attachment section (BAB1, BAB2, BAB3) different third attachment section (BAB1, BAB2, BAB3) of the outer casing side (24) changed. Battery cell (10a, 10b) according to one of the preceding claims, characterized in that the shape of the cut surface (SF) along the battery axis (BA) in the first fastening section (BAB1, BAB2, BAB3) changes at least once, in particular changes at least twice, preferably changed more than twice. Battery cell (10a, 10b) according to one of the preceding claims, characterized in that the surface area of the cut surface (SF) along the battery axis (BA) changes, in particular increases or decreases, in the first fastening section (BAB1, BAB2, BAB3), preferably the shape of the cut surface (SF) along the battery axis (BA) in the first fastening section (BAB1, BAB2, BAB3) remains the same or essentially the same. Battery cell (10a, 10b) according to any one of the preceding claims, characterized in that the surface area of the interface surface (SF) along the battery axis (BA) in the first fastening section (BAB1, BAB2, BAB3) changed suddenly at least once, preferably changed suddenly at least twice, most preferably changed suddenly at least three times. Battery cell (10a, 10b) according to one of the preceding claims, characterized in that the battery cell housing (20) in the first fastening section (BAB1, BAB2, BAB3) has at least one at least partially radially around the battery axis (RK) on the outer casing side (24) of the battery cell housing (20) has a projection formed, the projection preferably completely encircling the battery axis (BA). Battery cell (10a, 10b) according to one of the preceding claims, characterized in that the shape of the cut surface (SF) along the battery axis (BA) in the first fastening section (BAB1, BAB2, BAB3) rotates around the battery axis (BA), in particular rotates at least partially continuously around the battery axis (BA). Battery cell (10a, 10b) according to one of the preceding claims, characterized in that the anode contact (32) and/or the cathode contact (34) in the first fastening section (BAB1, BAB2, BAB3), in particular in the first fastening section (BAB1, BAB2 , BAB3) are arranged on the outer jacket side (24) of the battery housing (20), in which the section surface (SF) resulting from the respective edge curve (RK) changes at least once along the battery axis (BA). Battery cell adapter (60a, 60b) for a battery module cell holder (100), the battery cell adapter (60a, 60b) having an adapter housing (70) with an arrangement space (78) for arranging at least one battery cell (10a, 10b), the adapter housing (70) a base side (72), a cover side (76) opposite the base side (72) and an outer casing side (74) lying between the base side (72) and the cover side (76), with an adapter axis (AA) extending in a direction from the Cover side (76) extends to the base side (72), the outer shell side (74) having at least one first fastening section (BAA1, BAA2, BAA3) for arranging on a first counter-fastening section (BAM1) of the battery module cell holder (100) for fastening the battery cell adapter (60a, 60b), wherein the outer jacket side (74) of the adapter housing (70) forms an edge curve (RK) of a cut surface (SF) of a respective section along the adapter axis (AA), with si ch the sectional area (SF) resulting from the respective edge curve (RK) along the adapter axis (AA) in the at least one first fastening section (BAA1, BAA2, BAA3) changes at least once. Battery cell adapter (60a, 60b) according to claim 9 , characterized in that the cutting surface (SF) resulting from the respective edge curve (RK) along the adapter axis (AA) is additionally produced in at least one second fastening section (BAA1, BAA2, BAA3) which differs from the first fastening section (BAA1, BAA2, BAA3) changed on the outer shell side (74), preferably in at least one second fastening section (BAA1, BAA2, BAA3) of the outer shell side (74) which is different from the first fastening section (BAA1, BAA2, BAA3) and in one changed from the first fastening section (BAA1, BAA2, BAA3) and second attachment section (BAA1, BAA2, BAA3) different third attachment section (BAA1, BAA2, BAA3) of the outer casing side (74) changed. Battery cell adapter (60a, 60b) according to one of claims 9 or 10 , characterized in that the shape of the cut surface (SF) along the adapter axis (AA) in the first fastening section (BAA1, BAA2, BAA3) changes at least once, in particular changes at least twice, preferably changes more than twice. Battery cell adapter (60a, 60b) according to one of claims 9 until 11 , characterized in that the surface area of the cut surface (SF) along the adapter axis (AA) in the first fastening section (BAA1, BAA2, BAA3) changes, in particular increases or decreases, the shape of the cut surface (SF) preferably along the adapter axis ( AA) remains the same or substantially the same in the first attachment section (BAA1, BAA2, BAA3). Battery cell adapter (60a, 60b) according to one of claims 9 until 12 , characterized in that the surface area of the cut surface (SF) along the adapter axis (AA) in the first fastening section (BAA1, BAA2, BAA3) changes abruptly at least once, preferably changes abruptly at least twice, very preferably changes abruptly at least three times. Battery cell adapter (60a, 60b) according to one of claims 9 until 13 , characterized in that the adapter housing (70) in the first fastening section (BAA1, BAA2, BAA3) has at least one projection which is formed at least partially radially around the adapter axis (AA) on the outer jacket side (74) of the adapter housing (70), wherein preferably the projection completely surrounds the adapter axis (AA). Battery cell adapter (60a, 60b) according to one of claims 9 until 14 , characterized in that the shape of the cut surface (SF) rotates along the adapter axis (AA) in the first fastening section (BAA1, BAA2, BAA3) around the adapter axis (AA), in particular at least partially continuously around the adapter axis (AA) twisted. Battery cell adapter (60a, 60b) according to one of claims 9 until 15 , characterized in that the battery cell adapter (60a, 60b) has an electrically conductive anode contact contacting element for electrically connecting an anode contact (32) of the battery cell (10a, 10b) to an electrode contact of a further battery cell (10a, 10b) and/or that the battery cell adapter (60a, 60b) has an electrically conductive cathode contact contacting element for electrically connecting a cathode contact (34) of the battery cell (10a, 10b) to an electrode contact of a further battery cell (10a, 10b). System (200) comprising a battery cell adapter (60a, 60b) and at least one battery cell (10a, 10b), wherein the battery cell adapter (60a, 60b) according to one of claims 9 until 16 is formed, wherein the at least one battery cell (10a, 10b) is arranged in the arrangement space (78) of the adapter housing (70) of the battery cell adapter (60a, 60b), wherein in particular the arranged battery cell (10a, 10b) is a cylindrical battery cell or a cuboid battery cell battery cell is. Battery module cell holder (100), wherein the battery module cell holder (100) comprises a base body (110) with at least two receiving spaces (120a, 120b), wherein the at least two receiving spaces (120a, 120b) each have: - at least one first counter-mounting section (BAM1) for fastening, in particular for releasably fastening, a battery cell (10a, 10b) having a first fastening section (BAB1, BAB2, BAB3) and/or for fastening, in particular for releasably fastening, a battery cell adapter (60a, 60b) having a first fastening section (BAA1 , BAA2, BAA3), wherein the at least two battery cells (10a, 10b) each according to one of Claims 1 until 8th are formed and / or the at least two battery cell adapter (60a, 60b) each according to one of claims 9 until 16 are trained. Battery module cell holder (100). Claim 18 , characterized in that at least the respective first counter-fastening section (BAM1) of the two receiving spaces (120a, 120b) of the base body (110) is designed in such a way that the respective battery cell (10a, 10b) and/or the respective battery cell adapter (60a, 60b) can be detachably fastened in the respective receiving space (120a, 120b) by a rotary movement and/or a translatory movement.

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