DE102022202290A1 - Battery cell and method for recycling the same - Google Patents

Abstract

The invention relates to a battery cell (2) with a cell housing (4) for accommodating an electrode arrangement (16), the cell housing (4) having a cover (8) and a separate cell cup (6) with a base (10) and with a Cup jacket (14), with tabs (26) being arranged on the free end side (28) of the cup jacket (14), a support shoulder (30) being formed on the cell inside of the tabs (26) based on the free end side (28) of the cup jacket (14). , and wherein a seal (32) and the cover (8) are held in a clamping manner between the tabs (26) and the support shoulder (30) for fluid-tight closure of the cell housing (4). The invention further relates to a method for recycling such a battery cell (2).

Description

The invention relates to an invention relating to a battery cell with a cell housing for accommodating an electrode arrangement.

A battery cell typically includes a cell housing in which an electrode arrangement is accommodated. To recycle the battery cell, it is first removed from a battery and then completely placed in a shredding device, i.e. in a shredding system, so that the cell housing and the electrodes of the electrode arrangement are shredded together. The disadvantage is that a mixture of different recoverable raw materials is obtained, which have to be separated from one another in a comparatively complex manner for reprocessing.

The invention is based on the object of specifying a battery cell whose recycling makes it easier to separate different raw materials. Furthermore, a method for recycling such a battery cell should be specified.

With regard to the battery cell, the task is solved according to the invention with the features of claim 1. With regard to the method, the task is solved with the features of claim 8 according to the invention. Advantageous refinements and further developments are the subject of the subclaims. The statements in connection with the battery cell also apply to the process and vice versa.

The battery cell, which is designed in particular as a lithium-ion battery cell, comprises a cell housing (cell housing) which serves to accommodate an electrode arrangement with at least one anode and with at least one cathode, as well as to accommodate an electrolyte. The cell housing therefore forms a receiving space for the electrode arrangement and for the electrolyte. A separator is expediently arranged between each anode and each cathode. For example, each of the anodes or each of the cathodes is laminated, preferably on both sides, with such a separator. In particular, the separator also forms insulation between the cell housing and the electrodes.

The battery cell is intended and set up in particular for a battery, in particular a traction battery, of an electrically driven motor vehicle.

The cell housing comprises a cell cup (cell cup) and a cover which is designed separately from this and is expediently flat and/or plate-shaped. The battery cell is expediently a so-called prismatic battery cell. For this purpose, the cell cup comprises a (cup) base with an expediently rectangular base area, with the side walls of the cell housing on the circumference, i.e. on the edge, forming a trough shape or cup shape perpendicular to the floor. The cell cup and the lid together form a straight prism, with the side walls forming the (cup) jacket.

The cover expediently comprises at least one terminal for electrical contact from the outside of the cell, with the at least one anode or the at least one cathode of the electrode arrangement being electrically contacted with the terminal on the inside of the cell.

In particular, the cell cup and/or the lid is made of a sheet metal, preferably made of aluminum or an aluminum compound. manufactured. The cell cup and the lid can be made from different materials.

Tabs are arranged on the free end side of the cup shell, i.e. on the side of the cup shell that faces the lid and expediently runs parallel to the base. These are preferably designed in one piece, i.e. monolithically, with the cup jacket. In particular, the tabs are formed on the free end of the cup jacket or joined to it. A tab is preferably arranged on each side wall. The tab expediently extends along the entire outer edge of the free end side of the respective side wall.

When assembled, the tabs are folded or bent towards each other in a suitable manner. An approximately right angle is expediently formed between the tabs and the side walls, so that the tabs are oriented essentially parallel to the ground. The lid is arranged on the inside of the cell on the tabs. In summary, the tabs engage behind the cover when assembled.

Furthermore, a support shoulder is formed on the inside of the cell using the cup jacket. The support shoulder is suitably formed using the free end side of the cup shell. For this purpose, the thickness of the tab, i.e. its extent perpendicular to the plane spanned by the side wall on which the tab is arranged, is smaller than the thickness of this side wall. The tab is arranged on the outside of the cell on the free end side.

Alternatively, the support shoulder is formed by a, in particular bead-like and/or circumferential, deformation of the side wall towards the inside of the cell. The deformation is expediently arranged in the area of the free end of the side wall.

At most, the support shoulder is designed on the inside of the cell of the tabs and is preferably circumferential. The support shoulder expediently forms a support surface that runs parallel to the floor.

To close the cell housing in a fluid-tight manner, a seal is provided which, together with the cover, is held in a clamping manner between the support shoulder and the tabs. This means that undesirable leakage of electrolyte and/or penetration of air or dirt particles into the battery cell is avoided thanks to the seal.

With such a design of the cell housing, in which the cell cup and the lid in particular are formed as separate, i.e. separate, components, it is advantageously possible to separate the lid from the cell cup in a comparatively simple manner. In particular, the lid can be removed from the cell cup in a non-destructive manner in this way. This also makes it possible to reprocess and/or reuse the cell cup. Alternatively, the lid and cell cup can be recycled separately. If the lid and the cell cup are made of different materials, separate recycling, in other words pure recycling, is also possible.

According to a suitable embodiment, the seal is arranged, preferably circumferentially, between the support shoulder and the lid. The seal is therefore arranged on the inside of the cell of the lid, in particular on the lid side facing the bottom or the free end side of the cell cup. The seal thus rests on the support shoulder, with the seal being clamped between the cover and the support shoulder.

According to an alternative embodiment, the seal is arranged between the lid and the (folded or bent) tabs. The seal is therefore arranged on the outside of the cell on the lid, in particular on the lid side facing the bent or folded tabs. The lid thus rests on the support shoulder, with the seal being clamped between the lid and the tabs.

A drawstring is provided to ensure that the lid is held comparatively securely on the cell cup. This includes the cell housing of the battery cell, so that at least one of the tabs is clamped towards the cover. In other words, the drawstring is arranged on the base, on two opposing side walls and on the lid. Due to the tensioning of the at least one tab towards the lid, clamping of the lid and the seal is advantageously reinforced. Furthermore, the risk of the tab undesirably bending open, for example due to an increase in pressure or temperature in the battery cell, is reduced.

The tension band is preferably formed from an electrically insulating material. Consequently, the tension band can be used to electrically isolate the battery cell from another battery cell arranged adjacent to it. Further advantageously, pressure is already exerted on the battery cell using the tension band, so that when the battery cell is used in a module or in a cell pack, tensioning of the battery cells against one another can be eliminated or at least reduced.

For example, a tensioning device is provided on the drawstring, which can be used to increase the tension of the lid against the cell cup.

According to an expedient development, the bottom of the cell cup and the cup jacket of the cell cup are designed separately from one another. In other words, the cell cup is formed from the base and the cup shell as a housing component that is separate from the base.

Further tabs are arranged on the bottom free end side of the cup shell. In particular, these are designed in one piece with the cup jacket. Furthermore, on the inside of the cell in the area of the base, a further support shoulder is formed using the cup jacket. In a manner analogous to the support shoulder on the lid side, for example, in the area of the bottom-side free end of the side walls, a deformation, in particular a bead-like and/or circumferential, is introduced towards the inside of the cell, or the thickness of the further tabs is chosen to be smaller than the thickness of the side walls, whereby the tab is in each case is arranged on the outside of the cell on the bottom free end side.

To close the cell housing in a fluid-tight manner, a further seal is provided, which is held in a clamping manner together with the base between the further support shoulder and the further tabs.

For example, the further seal is arranged, preferably circumferentially, between the (bottom-side) further support shoulder of the Becker jacket and the floor. So the further seal is on the inside of the cell of the floor arranged. The further seal thus rests on the further support shoulder, with the further seal being clamped between the floor and the further support shoulder. Alternatively, the further seal is arranged between the base and the (folded or bent) additional tabs on the base. So the further seal is arranged on the outside of the cell on the floor. The floor thus rests on the further support shoulder on the floor, with the further seal being clamped between the floor and the further tabs.

In this design of the cell housing, i.e. with a lid that is separate from the cup jacket and a base that is separate from the cup jacket, the bottom and the lid each expediently have a terminal for electrical contacting of the battery cell.

In an expedient embodiment, the seal and/or the further seal is designed as a prefabricated component that is separate from the lid and the cell cup or from the base and the cup jacket. In this way, when recycling the battery cell, the seal is comparatively easy and can be completely removed from the lid, the base or the cup jacket. Another advantage when using such a separate seal is that it is not necessary to apply temperature when closing the battery cell. In particular, the lid or the base does not have to be welded to the cell cup. As a result, the electrolyte can advantageously be filled in before the battery cell is closed.

Suitably, the seal and/or the further seal is additionally or alternatively a, expediently elastic, polymer seal or an at least partially elastically deformable metal seal, in particular a copper seal. Due to the elastic deformation of the seal, a so-called springback is realized, so that even if the cover or base is raised slightly, for example due to an increase in pressure or temperature in the battery cell, the cell housing remains fluid-tight. In particular, if a metal seal is used, it additionally has, for example, a coating that flows when pressure is applied, in particular due to the tension of the base or lid against the cup jacket. Consequently, the cell housing is reliably sealed even with small unevenness in the lid, the base and/or the cell cup.

A further aspect of the invention relates to a method for recycling, in particular reprocessing, a battery cell according to one of the variants presented above.

If the battery cell is installed in a battery, for example in a battery module or in a so-called cell pack, it is expediently removed from the battery. For this purpose, the battery cell may be bonded, in particular using a so-called debonder.

According to the method, the lid is first removed from the cell cup and/or the base is removed from the cup jacket of the cell cup. The loosening is particularly preferably carried out non-destructively for the cell cup, for the lid and/or for the base. To do this, if available, the drawstring is removed from the cell housing and the tabs and/or other tabs are bent open. The tabs or the additional tabs are bent or folded in such a way that they no longer have a grip behind the lid or behind the base. In particular, the tabs are bent or folded away from the lid or the base.

If the cell cup is made in one piece, i.e. the base and cup shell are connected, and/or the two terminals are arranged on the lid, then after the lid has been detached from the cell cup, the lid is removed by bending or folding the tabs. Consequently, the electrode arrangement attached to the lid, in particular to its terminals, can be removed from the cell cup. The electrode arrangement is then separated from the cover, for example torn off.

If the base is designed separately from the cell cup and a terminal is provided in the base and in the lid, the anodes are expediently attached to the lid, in particular to its terminal, and the cathodes to the base, in particular to its terminal, or vice versa. After detaching the lid and the base from the cup jacket by bending or folding the tabs, the lid and the base are removed from the cell jacket, in particular by pulling the lid and the base apart. In particular, if the electrode arrangement is designed as an electrode coil, the electrode arrangement comes off the cover or base. According to an advantageous embodiment, however, in particular in an embodiment of the electrode arrangement as an electrode stack, the cover and the base are pulled apart in such a way that the anodes attached to the cover and the cathodes of the electrode arrangement attached to the base remain attached to the cover or to the base, and that the Anodes and cathodes are separated from each other, in particular pulled apart. The anodes are then separated from the cover and the cathodes from the base, in particular torn off. In this way the anodes and the cathode can be separated which makes recycling relatively easy.

For example, the cell cup or the cup jacket is then cleaned for reuse, i.e. for renewed use. Alternatively, the cell cup or the cup jacket is recycled. In particular, pure recycling takes place. For this purpose, the cup jacket or the cell cup on the one hand and the lid and possibly the base on the other hand are recycled separately from one another.

• 1a schematisch in einer perspektivischen Ansicht eine Batteriezelle in einem Vormontagezustand, wobei an einen Zellbecher deren Zellgehäuse freiendseitig Laschen angeordnet sind, die bei der Montage aufeinander zu gebogen oder gefaltet werden, so dass diese einen Deckel des Zellgehäuses hintergreifen,
• 1b die Batteriezelle der 1a im Montagezustand, wobei Laschen anhand eines Zugbandes zum Deckel hin verspannt sind,
• 2 schematisch in einem Querschnitt die Batteriezelle, wobei die Elektroden einer im Zellgehäuse aufgenommen Elektrodenanordnung mit zwei Terminals des Deckels verbunden sind,
• 3 schematisch in einem Querschnitt die Batteriezelle gemäß einer alternativen Ausführung, wobei der Boden des Zellbechers und der Bechermantel des Zellbechers zueinander separat ausgebildet sind, und wobei der Boden und der Deckel jeweils ein Terminal aufweist,
• 4 anhand eines Flussdiagramms einen Verfahrensablauf für das Recycling der Batteriezelle gemäß einer ersten Variante, und
• 5 anhand eines Flussdiagramms einen Verfahrensablauf für das Recycling der Batteriezelle gemäß einer zweiten Variante.

Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Show in it:

• 1a schematically a perspective view of a battery cell in a pre-assembly state, with tabs being arranged on the free end of a cell cup, which are bent or folded towards one another during assembly so that they engage behind a cover of the cell housing,
• 1b the battery cell of the 1a in the assembled state, with tabs being tensioned towards the lid using a drawstring,
• 2 schematically in a cross section the battery cell, the electrodes of an electrode arrangement accommodated in the cell housing being connected to two terminals of the cover,
• 3 schematically in a cross section the battery cell according to an alternative embodiment, wherein the bottom of the cell cup and the cup jacket of the cell cup are designed separately from one another, and wherein the bottom and the lid each have a terminal,
• 4 based on a flow chart, a process sequence for recycling the battery cell according to a first variant, and
• 5 based on a flow chart, a process sequence for recycling the battery cell according to a second variant.

Corresponding parts and sizes are always provided with the same reference numbers in all figures.

In the 1a is a prismatic battery cell 2, designed here as a lithium-ion battery cell, in a pre-assembled state and in the 1b shown in assembled state. The battery cell 2 comprises a cell housing 4 with a cell cup 6 and with a plate-shaped cover 8 for the cell cup 6. The cover 8 and the cell cup 6 are designed as separate housing parts.

The cell cup 6 has a (cup) base 10 with a rectangular base area. Side walls 12 protrude perpendicular to the circumference of the base 10, so that a tub shape or a cup shape is formed based on the base 10 and the side walls 12. The side walls form the so-called (cup) jacket 14. The cup jacket 14 therefore comprises two side walls 12 that run parallel to one another and two side walls 12 that run transversely to these.

When assembled, the cover 8 and the cell cup 6 enclose a receiving space for an electrode arrangement 16 (cf. 2 and 3 ), which has a number of anodes 18, i.e. a single anode 18 or more than one anode 18, and a number of cathodes 20, i.e. a single cathode 20 or more than one cathode 20. In other words, in the assembled state, the cell cup 6 and the cover 8 form the receiving space of the battery cell 2, also referred to as the cell interior area. The cover 8 here comprises a first and a second terminal 22 and 24 for electrical contact from the outside of the cell, the anodes 18 with the first Terminal 22 and the cathodes 20 are electrically contacted with the second terminal 24 on the inside of the cell using their arrester flags 25.

According to the 2 and 3 the electrode arrangement 16 is designed, for example, as an electrode stack. The electrodes 18, 20 are each formed using a film-like substrate to which a coating with active material is applied. In a manner not shown in detail, a separator is also arranged between the anodes 12 and the cathodes 14. For example, each of the anodes 12 or each of the cathodes is laminated, expediently on both sides, with such a separator.

Tabs 26 are arranged at the lid end of the cup jacket 14, these being formed in one piece with the cup jacket 14. One of the tabs 26 is arranged on each of the side walls 12, with the respective tab 26 extending along the entire extent of the respective side wall 12 in a plane spanned by it.

In the pre-assembly state, the tabs 26 are expediently bent away from each other or oriented parallel to the respective side wall 12. Consequently, the cover 8 and the electrode arrangement 16 attached to its terminals 22, 24 can be inserted into the cell cup. In the course of assembly (after inserting the cover 8 and the electrode arrangement 16), the tabs 26 are bent towards each other, so that an angle of approximately 90° between the tabs 26 and the respective sides wall 12 is formed. In the assembled state, the tabs 26 are oriented essentially parallel to the floor 10, with the cover 8 being arranged on the sides of the tabs 26 facing the cell interior. In summary, the tabs 26 engage behind the cover 8 in the assembled state.

The tabs 26 each have a trapezoidal shape, with its base, i.e. its larger base, being arranged on the cup jacket 14. In the assembled state, overlapping of the tabs 26 is avoided in this way.

The cell housing 4 of the battery cell 2 is optional, as in the 1b shown, provided with a drawstring 27. The drawstring 27 encompasses the cell housing 4 in the area of the lid 8, the base 10 and two of the side walls 12. In this way, the corresponding tabs 26 are tensioned towards the lid 8. One or more additional drawstrings are also optionally provided. An example of this is dash-dotted in the 1b shown. Each tension band 27 is formed from an electrically insulating material.

In the 2 a cross section of the battery cell 2 is shown, with the cutting plane running through the first terminal 22. The side walls 22 are integrally connected to the base 20 to form a tub or cup shape. The tabs 26 are arranged on the free end side 28 of the cup jacket 14, i.e. on the lid-side end of the side walls 12. Each of the tabs 26 has a thickness d _F which is smaller than the thickness d _S of that side wall 12 on which the tab 26 is arranged. The thickness means the spatial extent perpendicular to a plane, which plane is spanned by the respective side wall 12. The tabs 26 are each arranged at the end of the free end side 26 on the outside of the cell. In this way, a circumferential step shape is formed using the side wall 12 and the associated tab 26. In other words, a support shoulder 30 is formed on the inside of the cell of the tabs 26 using the free end of the cup jacket 14.

In an alternative not shown, the support shoulder 30 is formed by a bead-like depression in the side walls 12, which projects towards the inside of the cell.

A seal 32 rests on the free end side 28 or on the support shoulder 30. The cover 8 is arranged on the seal 32. In summary, the (circumferential) seal 32 is arranged between the support shoulder 30 and the cover 8. According to an alternative not shown, in an analogous manner to the design of the battery cell 2 according to 3 - The seal 32 is arranged between the cover 8 resting on the support shoulder 30 and the tabs 26. In the assembled state, the cover 8 and the seal 32 are held in a clamping manner between the support shoulder 30 and the tabs 26. In this way, the cell housing 4 is closed in a fluid-tight manner.

In the 3 a cross section of an alternative embodiment of the battery cell 2 is shown. The comments on this apply 1 a until 2 with the exception of what is presented below in an analogous manner.

The bottom 10 of the cell cup 6 is formed separately from the cup jacket 14. At the bottom free end of the cup jacket 14, in particular on the free end side 34 of the cup jacket 14 facing the floor, further tabs 36 are arranged and connected in one piece to the cup jacket 14.

A further circumferential support shoulder 38 is formed on the inside of the cell of the further tabs 36. For this purpose, each of the further tabs 36 has a thickness d _F , which is smaller than the thickness ds of that side wall 12 on which the further tab 36 is arranged. The further tabs 36 are each arranged at the end of the free end side 34 on the outside of the cell. In an alternative not shown, the further support shoulder 38 is formed by a bead-like depression in the side walls 12, which projects towards the inside of the cell.

In an analogous manner to the tabs, the further tabs 36 are bent towards one another in the assembled state, so that the base 10 and a further seal 40 are held in a clamping manner between the further support shoulder 38 and the further tabs 36.

According to the in the 3 In the variant shown, the cover 8 is arranged between the support shoulder 30 and the seal 32 and the seal 32 is arranged between the cover 8 and the tabs 8. Furthermore, the floor 10 is arranged between the further support shoulder 38 and the further seal 40 and the further seal 40 between the floor 10 and the further tabs 26.

In an alternative not shown further - according to the design of the battery cell 2 according to 2 - The seal 32 is arranged between the cover 8 and the support shoulder 30, with the cover 8 resting on the tabs 26. Additionally or alternatively, the further seal 40 is arranged between the base 10 and the further support shoulder 38, the base 10 resting on the further tabs 36.

The cover 8 includes the first terminal 22, to which the anodes 18 are connected, the base 10 includes the second terminal 24, to which the cathodes 20 are connected. The two terminals 22, 24 are arranged opposite each other on the battery cell 2. In the 3 the cutting plane runs through the two terminals 22, 24.

Optionally, a drawstring 27 includes the battery cell 2 3 in an analogous manner to the statements of 1b .

In the versions of the battery cell 2 according to one of the 1 a until 3 the seal 32 and possibly the further seal 40 are each designed as a separate and prefabricated component from the cell cup lid 4 and the cup jacket 22. For example, the seal 32 and/or the further seal 40 is each designed as a flat seal or as a round seal. According to the exemplary embodiment shown here, the further seal 40 has a substantially rectangular cross section. The seal 32 and/or the further seal 40 is each an elastic polymer seal, for example a rubber seal or an at least partially elastically deformable metal seal.

In the 4 is a first variant of a method for recycling the battery cell 2 according to 1a until 2 (with a one-piece cell cup) shown using a flow diagram. In a first step Ia, the lid 8 is detached from the cell cup 6, the detachment being carried out non-destructively for the cell cup 6 and for the lid 8. For this purpose, if necessary, the drawstring is removed and the tabs 26 are bent open, i.e. bent away from each other, so that the cover 8 can be removed.

Subsequently, in a second step Ila, the cover 8 with the attached electrode arrangement 16 is removed from the cell cup 6, i.e. the electrode arrangement 16 is removed from the cell cup 8.

In a subsequent step Illa, the electrode arrangement 16 is separated from the cover 8, for example torn off. In particular, the anodes 18 are separated from the first terminal 22 of the cover 8 and the cathodes 20 are separated from the second terminal 24 of the cover 8.

The cover 8, the electrode arrangement 16 and the cell cup 6 are separated from each other in this way. For example, these components are reprocessed separately from each other. However, according to step IVa, the cell cup 6 is preferably cleaned for reuse and the lid 8 and the electrode arrangement 16 are reprocessed separately.

In the 5 is a second variant of a method for recycling the battery cell 2 according to 3 (Cell cup with cup jacket separate from the bottom) shown using a flow diagram. In a first step Ib, the lid 6 is detached from the cup jacket 14 and the base 10 is detached from the cup jacket 14. The loosening is carried out non-destructively for the cell cup 6 and for the lid 8. For this purpose, if necessary, the drawstring is removed and the tabs 26 are bent open, i.e. bent away from each other, so that the lid 8 can be removed. Likewise, the further tabs 36 are bent open, i.e. bent away from each other, so that the base 10 can be removed.

The lid 8 and the base 10 are then pulled apart in a second step Ilb. For example, the electrode arrangement 16 travels from the first terminal 22 of the cover 8 and/or from the second terminal 24 of the base 10, so that the electrode arrangement 16 can be removed from the cell housing 4. However, expediently, and in particular if the electrode arrangement 16 is designed as an electrode stack, when the base 10 and the cover 8 are pulled apart, the electrodes 18, 20 are also pulled apart. The anodes 18 remain attached to the terminal 22 of the cover 8 and the cathodes 20 to the terminal 24 of the base 10. The anodes 18 and the cathodes 20 are therefore removed from the cell interior separately from one another. If the separators are laminated with the anodes 18 or with the cathodes 20, they remain joined, for example, to the respective anode 18 or cathode 20. Otherwise, the separators can also be removed from the cell interior together with the anodes 18 and the cathodes 20.

In the subsequent step IIIb, the anodes 18 are separated from the cover 8 and the cathodes 20 are separated from the base 10, for example torn off. In this way, the anodes 18, the cathodes 20, the base 10, the lid 8 and the cup jacket 14 are isolated and are available separately for further recycling.

For example, these components are reprocessed separately from each other. However, according to step IVb, the cup jacket 14 is preferably cleaned for reuse and the lid 8, the base 10, the anodes 18 and the cathodes 20 are reprocessed separately from one another.

The invention is not limited to the exemplary embodiments described above. Rather, other variants of the invention can also be used dung can be derived from this by a person skilled in the art without departing from the subject matter of the invention. In particular, all of the individual features described in connection with the exemplary embodiments can also be combined with one another in other ways without departing from the subject matter of the invention

Reference symbol list

2

Battery cell

4

Cell casing

6

cell cup

8th

Lid

10

Floor

12

side walls

14

Cup coat

16

Electrode arrangement

18

anode

20

cathode

22

first terminal

24

second terminal

25

Arrester flags

26

tab

27

Drawstring

28

cover side free end side

30

Support shoulder

32

poetry

34

ground-side free end side

36

another tab

38

further support shoulder

40

further seal

dF

Thickness of the tab

dF'

Thickness of the additional flap

dS

Thickness of the side wall

Yes

Remove the lid from the cell cup

IIa

joint removal of the cover and the electrode arrangement

IIIa

Separating the electrode assembly from the lid

IVa

Cleaning the cell cup

Ib

Detach the lid and base from the cell cup shell

IIb

Pulling the lid and base apart

IIIb

Separating the anodes from the lid and the cathodes from the base

IVb

Cleaning the cell cup

Claims (10)

Battery cell (2) with a cell housing (4) for holding an electrode arrangement (16), - the cell housing (4) having a lid (8) and a separate cell cup (6) with a base (10) and a cup jacket (14), - wherein tabs (26) are arranged on the free end side (28) of the cup jacket (14), - whereby a support shoulder (30) is formed on the inside of the cell based on the cup jacket (14), in particular based on its free end side (28), and - A seal (32) and the cover (8) are held in a clamping manner between the tabs (26) and the support shoulder (30) for fluid-tight closure of the cell housing (4). Battery cell (2). Claim 1 , characterized in that the seal (32) is arranged between the support shoulder (30) and the cover (8). Battery cell (2). Claim 1 , characterized in that the seal (32) is arranged between the cover (8) and the tabs (26). Battery cell (2) according to one of the Claims 1 until 3 , characterized in that a tension band (27) surrounds the cell housing (4), so that at least one of the tabs (26) is tensioned towards the cover (8). Battery cell (2) according to one of the Claims 1 until 4 , characterized in that - the bottom (10) and the cup jacket (14) are designed separately from one another, with further tabs (36) being arranged on the bottom free end side (34) of the cup jacket (14), - with a further support shoulder on the inside of the cell ( 38) is formed on the basis of the cup jacket (14), in particular on the basis of its free end side (34), and - for fluid-tight closure of the cell housing (4) between the further tabs (36) and the further support shoulder (38) a further seal (40 ) and the cover (8) are held in a clamping manner. Battery cell (2) according to one of the Claims 1 until 5 , characterized in that the seal (32) and / or the further seal (40) is each formed as a separate and prefabricated component from the cell cup (6) and the lid (4). Battery cell (2) according to one of the Claims 1 until 6 , characterized in that the seal (32) and/or the further seal (40) is a polymer seal or an at least partially elastically deformable metal seal. Method for recycling a battery cell (2) according to one of Claims 1 until 7 , - the lid (8) being detached from the cell cup (6) and/or the bottom (10) from the cup jacket (14) of the cell cup (6), and - the electrode arrangement (16) being detached from the lid (8) and/or is separated from the floor (10). Procedure according to Claim 8 , characterized in that the cell cup (6) or the cup jacket (14) is cleaned for renewed use. Procedure according to Claim 8 or 9 , characterized in that after the base (10) and the lid (8) have been detached from the cup jacket (14), the lid (8) and the base (10) are pulled apart so that the anodes (18.) attached to the lid (8). ) and the cathodes (20) attached to the base (10) of the electrode arrangement (16), in particular designed as an electrode stack, are separated.

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