DE102022118678A1 - Method for producing a storage cell for an electrical energy storage, storage cell for an electrical energy storage and motor vehicle - Google Patents

Abstract

The invention relates to a method for producing a storage cell (1) for an electrical energy storage device of a motor vehicle, in which a stack (68) consists of two electrodes (69, 70) arranged one on top of the other and a separator (71) arranged between the electrodes (69, 70). ) (11) is wound onto a rod element (12), whereby an electrode coil (80) is produced from the stack (68), which is arranged in a housing element (3) of the memory cell (1), with the rod element (12 ) from the electrode winding (80), whereby the electrode winding (80) and the rod element (12) arranged therein form a structural unit (15), which is arranged in the housing element (3) and used as part of the completely manufactured memory cell (1). .

Description

The invention relates to a method for producing a storage cell for an electrical energy storage device according to the preamble of patent claim 1. The invention further relates to a storage cell for an electrical energy storage device according to the preamble of patent claim 3, 6 or 7. The invention also relates to a motor vehicle.

The DE 10 2016 009 910 A1 a battery device can be seen as known, with a tubular housing which surrounds a battery cell space in which at least one battery cell or at least one battery cell coil is accommodated or at least receivable. Furthermore, the reveals WO 2019/043413 A1 a modular carrier element for cylindrical battery cells. In addition, from the DE 10 2008 009 041 A1 a drive battery assembly of an electric fuel cell or hybrid vehicle for transporting people and / or goods is known.

The object of the present invention is to create a method for producing a storage cell for an electrical energy storage, a storage cell for an electrical energy storage and a motor vehicle, so that in a particularly advantageous manner a particularly advantageous temperature control, that is cooling and / or heating, of the storage cell can be realized.

This object is achieved according to the invention by a method with the features of patent claim 1, by a memory cell with the features of patent claim 3, by a memory cell with the features of patent claim 6, by a memory cell with the features of patent claim 7 and by a motor vehicle with the features of claim 13 solved. Advantageous embodiments of the invention are the subject of the dependent claims.

A first aspect of the invention relates to a method for producing a storage cell for an electrical energy storage device of a motor vehicle, in particular a motor vehicle preferably designed as a passenger car. Using the storage cell, electrical energy can be stored, in particular electrochemically. For example, in its fully manufactured state, the electrical energy storage device has the storage cell mentioned and several additional storage cells, whereby the previous and following statements regarding the storage cell can also be easily transferred to the additional storage cells. In particular, the storage cells of the electrical energy storage are electrically connected to one another. Electrical energy, in particular electrochemically, can thus be stored by means of the electrical energy storage device. Preferably, the electrical energy storage is a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and most preferably is several hundred volts. Preferably, the motor vehicle, also simply referred to as a vehicle, is an electric or hybrid vehicle, in particular a battery-electric vehicle (BEV). In this case, for example, in its fully manufactured state, the motor vehicle has at least one electrical machine by means of which the motor vehicle can be driven, in particular purely electrically. For this purpose, the electrical machine is supplied with the electrical energy stored in the electrical energy storage. The electrical machine is preferably a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and most preferably is several 100 volts. For example, the storage cell is a lithium-ion cell, so that the electrical energy storage can preferably be a lithium-ion battery.

In the method, a stack of, in particular at least or precisely, two electrodes arranged one on top of the other and a separator arranged between the electrodes is wound onto a rod element, which is in particular designed separately from the stack and, for example, as a tube, the rod element being, for example, cylindrical on the outer circumference in particular has the shape of a straight circular cylinder. In other words, the electrodes and the separator form the said stack because the electrodes and the separator are arranged one on top of the other in particular along a stacking direction, wherein the electrodes and the separator are arranged on top of one another in particular along the stacking direction in such a way that along the stacking direction of the Separator is arranged between the electrodes. For example, the electrodes form or are respective electrode layers, and for example the separator forms or is a separator layer. In particular, the stack and thus the electrodes and the separator are wound onto the rod element around an imaginary winding axis, the stack element preferably being designed separately from the stack and thus separately from the electrodes and separately from the separator. For example, the rod element is a solid and preferably inherently rigid. In particular, the rod element can be formed from a metallic material. By winding it up of the stack, an electrode coil is made from the stack. In other words, the electrodes arranged one on top of the other in particular in the stacking direction and the separator arranged between the electrodes in particular along the stacking direction are wound up to form the electrode winding, in particular around the imaginary winding axis. In particular, the electrode winding is then arranged in a housing element of the memory cell which is in particular designed separately from the electrode winding and is also referred to as a cell housing element. The housing element is, for example, or comprises, for example, a housing jacket, which, because the electrode winding is arranged in the housing element, surrounds at least a length region of the electrode winding in the circumferential direction of the electrode winding and thus in the circumferential direction of the memory cell, in particular completely circumferentially. In particular, the electrode winding and the memory cell have a longitudinal extension direction along which the electrode winding and the memory cell are at least substantially elongated. In particular, the longitudinal direction of extension coincides with the imaginary winding axis. The aforementioned circumferential direction runs around the longitudinal direction, i.e. around the winding axis.

In order to be able to control the temperature of the storage cell particularly well in a particularly advantageous manner, that is to say to cool and/or heat it, it is provided according to the invention that the rod element does not have to be removed from the electrode winding, whereby the electrode winding and the rod element arranged in the electrode winding form a structural unit , which is arranged in the housing element and is used, for example, as part of the fully manufactured memory cell, i.e. in the fully manufactured state of the memory cell. Since the stack is wound onto the rod element, and is therefore wound around the rod element, the rod element is used, so to speak, as a support structure to produce the electrode winding, so that the rod element is used in producing the electrode winding. In addition, the rod element is arranged in the electrode winding, since the stack is wound onto the rod element or wrapped around the rod element. This is to be understood in particular as meaning that at least one length range, in particular at least a predominant length range and thus, viewed in the longitudinal direction, at least more than half of the rod element is arranged in the electrode winding and is therefore surrounded by the electrode winding in the circumferential direction of the memory cell, in particular completely circumferentially. Since the rod element is arranged in the electrode winding, heat can be particularly advantageously dissipated from the electrode winding, in particular from an interior of the electrode winding, via the rod element, whereby the electrode winding can be cooled particularly advantageously. Alternatively or additionally, for example, heat can be introduced particularly advantageously into the electrode coil or into its interior via the rod element, whereby the electrode coil can be heated particularly advantageously. Thus, in the method according to the invention, the rod element is used on the one hand as a support structure for producing the electrode coil. On the other hand, the invention makes it possible to use the rod element as a temperature control element for tempering the electrode winding, since the rod element remains in the electrode winding and is therefore not removed from the electrode winding. In its fully manufactured state, the memory cell thus comprises the rod element (support structure), via which the temperature of the electrode coil can be particularly advantageously controlled. In other words, the bar element has a dual function. On the one hand, the rod element is used to produce the electrode winding and, on the other hand, the rod element is used as a component of the completely manufactured storage cell, so that subsequently the rod element can be used, for example during operation of the electrical energy storage device, in particular to close the electrode winding via the rod element temper. Since the rod element remains in the electrode winding in order to realize the dual function, the invention also enables time- and cost-effective production of the memory cell.

In order to be able to realize a particularly advantageous temperature control of the electrode coil via the rod element, it is provided in one embodiment that the rod element, in particular in its interior, has a channel, also referred to as a temperature control channel, which, for example, comes from an inner circumferential surface of the rod element, in particular directly. is limited. The winding axis and thus the longitudinal extension direction of the memory cell run in the axial direction of the memory cell or are also referred to as the axial direction. A plane that runs perpendicular to the axial direction of the memory cell is also referred to as a radial plane, whereby, in particular, all directions that run in the radial plane and thus run perpendicular to the axial direction of the memory cell are also referred to as the radial direction of the memory cell and thus of the rod element. Thus, for example, the inner circumferential lateral surface faces inwardly away from the electrode winding, particularly in the radial direction of the storage cell and thus of the rod element. In particular, for example, the channel is in a radial direction Direction of the storage cell and thus of the rod element outwards and thus in particular towards the electrode winding, in particular directly, limited by the inner circumferential lateral surface of the rod element. The channel is used as a temperature control channel through which a preferably liquid temperature control medium can flow or flows through for temperature control, that is to say for cooling and/or heating, of the storage cell, in particular during operation of the electrical energy storage device. The rod element is thus used as a line element for guiding the preferably liquid temperature control agent. A heat exchange can take place via the rod element between the electrode winding and the temperature control medium flowing through the channel and thus between the storage cell and the temperature control medium, whereby, for example, the electrode winding and thus the storage cell can be heated and/or cooled. This allows efficient and effective temperature control of the electrode coil, particularly via its interior.

The electrode wrap is also known as a jelly roll, roll or wrap. The electrodes and the separator arranged between them are provided, for example, as bands, that is to say at least essentially band-shaped, and, in particular, then wound up to form the electrode coil. For example, the memory cell, in particular on the outer circumference, is cylindrical and thus designed as a round cell. Expressed again in other words, the memory cell, for example, has the shape of a straight circular cylinder on the outer circumference, which is also simply referred to as a cylinder.

It is conceivable that the stack has at least or exactly one first contacting element, wherein the stack can in particular additionally have at least or exactly one second contacting element. For example, the electrodes are formed separately from each other and separately from the separator, so that the separator is formed separately from the electrodes. In particular, it is conceivable that the contacting elements are designed separately from one another, separately from the electrodes and separately from the separator. The contacting elements are also simply referred to as contacts. Since, for example, one of the electrodes is an anode or is referred to as an anode, one of the contacting elements is, for example, an anode contact, which is electrically connected, in particular directly, to the anode. Since, for example, the other electrode is used as a cathode or is designed as a cathode, the other contacting element is also referred to as cathode contacting, for example, since the other contacting element is electrically connected, in particular directly, to the cathode. It is therefore conceivable that when the stack is wound up, the electrodes, the separator and the contacting elements are wound up to form the electrode winding, in particular around the winding axis. In particular, before the stack is wound up, the electrodes, the separator and the contacting elements are arranged one on top of the other along the stacking direction and thus in succession. In the completely manufactured state of the memory cell, for example, the cathode is electrically connected to a first connection element of the memory cell via the cathode contact, and the electrode is electrically connected to a second connection element of the memory cell via the electrode contact, the connection elements being, for example, electrically separated or insulated from one another. For example, the storage cell can provide the electrical energy stored in it via the connection elements, also known as terminals. Furthermore, it is conceivable that, for example, electrical energy provided or available by a generator can be supplied to the memory cell via the connection elements and subsequently stored in the memory cell.

In conventional methods, the stack is wound onto a chuck and then removed from the chuck, so that the chuck is removed from the electrode coil. As a result, the electrode winding is further processed and, for example, moved into the housing element, in particular inserted, particularly in the axial direction and thus along the imaginary winding axis. The housing element is, for example, part of a housing of the memory cell, also referred to as a cell housing. It is conceivable that the cell housing has at least one cover element, also referred to as a cover, so that in the fully manufactured state of the storage cell, the electrode winding, for example in the longitudinal direction of the electrode winding, is at least partially on one side of the electrode winding, in particular at least predominantly and therefore at least more than half or but completely covered by the lid. In particular, the housing element is closed, for example, by means of the cover. The cover is, for example, formed separately from the housing element and is connected to the housing element, in particular directly, for example in that the cover and the housing element are crimped together, and are therefore connected to one another by crimping. As a result, for example, the electrode coil is tightly enclosed in the cell housing.

The memory cell, for example designed as a round cell, is a very good memory cell that can be produced cost-effectively and quickly. Particularly It is advantageous to have at least substantially flat contact between the respective contacting element and the respective electrode, which is electrically connected to the respective contacting element.

The invention now makes it possible to avoid a work step in which the clamping device is removed from the electrode coil, since in the invention the rod element is used as a clamping device and as a component of the finished or completely manufactured memory cell. As a result, the rod element can be used as a temperature control element, via which the electrode coil can be tempered effectively and efficiently.

Furthermore, for example, the rod element, in particular as a sleeve, can be used, for example, at least essentially to fasten the tubular storage cell, in particular via fastening elements, to an upper and lower shell, in particular a storage housing of the energy storage device. For this purpose, for example, the rod element is connected to the upper shell by means of at least one first fastening element and to the lower shell by means of at least one second fastening element. In this way, a sandwich structure such as a honeycomb structure can be realized, in particular from the upper shell, the lower shell and with the storage cell arranged between them, so that a particularly high rigidity of the energy storage can be achieved in a weight-efficient manner. Connecting the storage cells to the upper shell and the lower shell by means of gluing can be omitted and therefore avoided. As a result, a particularly advantageous ability to repair and dispose of the energy storage device can be demonstrated. Furthermore, it is possible to use an outer peripheral surface of the rod element, which faces the electrode winding, in particular in the radial direction of the memory cell, for electrical contacting. In this regard, it is particularly conceivable that, for example, the first electrode and/or the second electrode is electrically connected, in particular directly, to the outer circumferential surface of the rod element, so that the rod element is used as a contacting element, so to speak. Thus, for example, the memory cell can provide the electrical energy stored in it via the rod element and the aforementioned energy that can be provided or provided by the generator can, for example, be supplied to the memory cell via the rod element and subsequently stored in the memory cell. In particular, this makes it possible to realize a particularly large-area electrical contact between the respective electrode and the rod element, whereby particularly advantageous temperature control, in particular heat dissipation, can also be achieved.

A second aspect of the invention relates to a storage cell for an electrical energy storage device for a motor vehicle. The previous and following statements regarding the memory cell according to the first aspect of the invention and the motor vehicle according to the first aspect of the invention can easily be transferred to the second aspect of the invention and vice versa. The memory cell according to the second aspect of the invention has an electrode coil which has two electrodes and a separator arranged between the electrodes. The two electrodes and the separator of the memory cell according to the second aspect of the invention are wound into the electrode winding, in particular around a particularly imaginary winding axis. The memory cell according to the second aspect of the invention also has a rod element formed separately from the electrode winding, which is arranged in the electrode winding and is therefore surrounded by the electrode winding at least in a length region of the rod element, in particular in the circumferential direction of the rod element and thus of the memory cell. In particular, the rod element has a longitudinal extension direction along which the rod element extends elongated, the circumferential direction extending around the longitudinal extension direction. The memory cell also has a cell housing, simply referred to as a housing, in which the electrode winding and at least the length region of the rod element are arranged.

In order to be able to realize a particularly advantageous temperature control of the memory cell in a particularly advantageous, in particular in a particularly simple and cost-effective manner, it is provided in the second aspect of the invention that the cell housing has the electrode coil, and therefore at least a length region of the electrode coil, in particular in the circumferential direction of the rod element and thus the storage cell as a whole, in particular completely surrounding, housing jacket and at least one cover element covering the electrode winding in the longitudinal direction of the electrode winding and thus of the rod element on one side of the electrode winding, in particular at least predominantly and therefore at least more than half or completely having. If, for example, in the completely manufactured state of the motor vehicle equipped with the electrical energy storage, the said side of the electrode coil points upwards in the vertical direction of the vehicle, so that the side is a top side, then the cover element is, for example, a cover or the cover element is also referred to as a cover of the cell housing. Then, for example, the electrode wrap is in the vehicle vertical direction upwards at least in particular at least predominantly covered by the cover element. However, if, for example, in the fully manufactured state of the motor vehicle and thus in the installed position of the memory cell, which assumes its installed position in the fully manufactured state of the motor vehicle, points downwards in the vertical direction of the vehicle, then the side mentioned is an underside. Then the cover element is a floor or the cover element is then referred to as a floor, in which case the electrode coil is then covered or overlapped downwards in the vertical direction of the vehicle, in particular at least predominantly, by the cover element.

In the second aspect of the invention it is provided that the housing jacket, the cover element and the rod element are formed in one piece with one another. This is to be understood as meaning that the housing jacket, the cover element and the rod element are formed from a single piece, so that the housing jacket, the cover element and the rod element are designed as a monoblock or are formed by a monoblock. Expressed again in other words, the housing jacket, the cover element and the rod element are not composed of parts that are formed separately from one another and connected to one another, but rather the housing jacket, the cover element and the rod element are formed by a one-piece and therefore integrally formed body. In this way, excessive heat transfer barriers can be avoided, so that heat can be particularly advantageously introduced into the electrode winding and/or heat can be dissipated from the electrode winding, particularly via the rod element. This makes it possible to achieve particularly good temperature control of the memory cell. In particular, it is provided that the cover element is formed separately from the electrode winding. Preferably, the housing jacket and/or the rod element are also formed separately from the electrode winding. Further advantages are that if the rod element, also referred to simply as a rod, is loose, it could move undesirably, particularly in the event of a thermal event, which is also referred to as a thermal event, and carry out an undesirable, unfavorable movement and as a result, for example Damage memory cell. Advantages and advantageous refinements of the first aspect of the invention are to be viewed as advantages and advantageous refinements of the second aspect of the invention and vice versa.

Furthermore, it would be conceivable for the housing jacket, the cover element and the rod element to be formed from a single sheet metal part and thus in one piece with one another. Alternatively, the housing jacket, the cover element and the rod element could be designed separately from one another and connected to one another. It is conceivable that the housing jacket, the cover element and the rod element are each designed as a sheet metal part, wherein the sheet metal parts can be designed separately from one another and connected to one another, in particular welded to one another.

In an advantageous embodiment of the second aspect of the invention, the cell housing has a second cover element which is spaced apart from the cover element in the longitudinal direction of the electrode coil and with the storage cell. For example, if the first cover element is the base mentioned, the second cover element is the cover mentioned. For example, if, conversely, the first cover element is said cover, then the second cover element is said base. The second cover element covers the electrode winding in the longitudinal direction of the electrode winding and thus the storage cell, in particular at least predominantly or completely, on one side of the electrode winding opposite the side of the electrode winding in the longitudinal direction of the electrode winding. As a result, the electrode coil can be particularly advantageously enclosed in the cell housing, so that effective and efficient temperature control can be achieved.

It has proven to be particularly advantageous if the second cover element is designed separately from the rod element, separately from the housing jacket and separately from the first cover element and is connected to the rod element and/or to the housing jacket, in particular directly and/or by crimping . In this way, excessive heat transfer barriers can be avoided, so that particularly effective and efficient temperature control of the storage cell can be achieved.

A third aspect of the invention relates to a storage cell for an electrical energy storage device for a motor vehicle. The previous and following statements regarding the memory cell and the motor vehicle according to the first aspect and according to the second aspect of the invention can easily be transferred to the third aspect of the invention and vice versa. The memory cell according to the third aspect of the invention comprises an electrode coil which has two electrodes and a separator arranged between the electrodes. The electrodes and the separator are wound into the electrode coil, in particular around an imaginary winding axis. The memory cell according to the third aspect of the invention also has a rod element, which is preferably formed separately from the electrode winding. The rod element is arranged in the electrode coil, whereby the rod element is at least in a length range, in particular at least in a predominant length range, of the rod ments, in particular in the circumferential direction of the rod element and thus the storage cell, is surrounded by the electrode winding, in particular completely circumferentially. The rod element has, in particular in its interior, a channel through which a preferably liquid temperature control agent can flow for temperature control of the storage cell, which channel is delimited, in particular directly, by an inner peripheral lateral surface of the rod element. The rod element is preferably a solid and inherently rigid.

In order to be able to realize a particularly advantageous temperature control of the electrode winding and thus of the memory cell, in particular via the rod element, in a particularly advantageous, in particular in a particularly simple, manner, it is provided in the third aspect of the invention that the rod element is on its side from the electrode winding The inner side facing away from one another and facing the channel and, for example, delimiting the channel, in particular in the radial direction of the rod element or the storage cell towards the outside, has two grooves which are spaced apart from one another in the longitudinal direction of the rod element, in each of which there is a sealing element which is formed separately from the rod element and is made of rubber, for example is arranged. For example, the sealing element is a sealing ring, in particular an O-ring. The rod element can function as a nut piece or be a nut piece into which, for example, a male piece, also known as a dome or connecting dome, can be inserted on both sides. For example, the temperature control medium can flow through the respective dome. For example, the temperature control agent can be introduced into the channel and thus into the rod element, which is used as a line element, via a first of the domes formed separately from the rod element and separately from the sealing elements. For example, the temperature control medium flowing through the channel can be removed from the channel and thus from the rod element via the second dome. The respective dome can therefore be arranged at least partially in the channel and thus in the rod element. It is conceivable that the channel can be insulated and/or painted. Thus, for example, the rod element has a base body which is provided with an insulating layer and/or a lacquer layer. Advantages and advantageous embodiments of the third aspect of the invention are to be viewed as advantages and advantageous embodiments of the first aspect and the second aspect of the invention and vice versa.

The respective dome can be sealed against the rod element functioning as a line element by means of the respective sealing element, in particular in such a way that the respective sealing element rests on the one hand, in particular directly, on the dome and on the other hand, in particular directly, on the line element. In other words, a first of the domes can be sealed against the rod element by means of a first of the sealing elements, and the second dome can be sealed against the rod element via the second sealing element. This makes it possible to avoid undesirable flows of the temperature control agent and thus leaks, so that particularly effective and efficient temperature control can be achieved. In addition, the electrical energy storage can be manufactured particularly easily and therefore in a timely and cost-effective manner, so that the advantageous temperature control can be achieved in a particularly advantageous manner. For example, the domes can be particularly easily inserted into the rod element at least partially, in particular in the longitudinal direction of the rod element. Since the sealing elements were previously arranged in the corresponding grooves, the domes can be sealed particularly easily and effectively against the rod element.

A fourth aspect of the invention relates to a storage cell for an electrical energy storage device for a motor vehicle. The previous and following statements regarding the memory cell and the motor vehicle according to the first aspect, the second aspect and the third aspect of the invention can easily also be transferred to the memory cell according to the fourth aspect of the invention and vice versa. The memory cell according to the fourth aspect of the invention has a cell housing, also simply referred to as a housing, and a layer structure arranged in the cell housing, which is preferably formed separately from the cell housing. The layer structure has a plurality of layers arranged one on top of the other, which are arranged one on top of the other, that is to say one after the other, in particular along a stacking direction. In particular, the stacking direction runs in the longitudinal direction of the memory cell. A first of the layers is a cathode layer, which functions, is operated, is operable, can be used or is used as a cathode, in particular during operation of the electrical energy storage and thus of the storage cell. A second of the layers is an anode layer, which functions, is used, is usable, is operable or is operated, for example, as an anode during the said operation of the electrical energy storage and thus of the storage cell. A third of the layers is a separator layer which is arranged, in particular along the stacking direction, between the first layer and the second layer, therefore between the cathode layer and the anode layer. Related to a charged state and an uncharged or discharged state In the state of the memory cell, the anode layer is provided or formed at least or exclusively in the charged state, since, for example, during charging of the memory cell, also known as charging, the anode is formed from at least or exactly one material such as, for example, from, in particular, pure, lithium, which, for example can be provided or is provided by the cathode layer, which is provided or formed in particular both in the charged state and in the discharged state. For example, the anode layer forms on or on a substrate such as the separator and/or a substrate element provided in addition to the separator, for example the substrate being coated to enable a deposit, in particular formed as a lithium deposit, through which the anode is or is formed . In particular, the memory cell according to the fourth aspect of the invention can be designed as a solid-state cell, therefore as a solid-state battery, which is also referred to as a solid-state battery or solid-state battery. In the case of the solid-state cell, which is also known as a solid-state cell, for example, no liquid electrolyte is provided, but rather, in particular exclusively, an electrolyte made of solid material and therefore designed as a solid body is provided. The previous and following statements on the memory cell according to the fourth aspect of the invention relate in particular to the charged state of the memory cell, with both electrodes being designed, for example, as solid bodies, particularly in the charged state, and therefore made of a solid material. Because in the fourth aspect of the invention the memory cell has the layer structure, which in turn has the plurality of stacks, a particularly advantageous structure of the memory cell can be realized, so that the memory cell, in particular the layer structure, can be tempered particularly advantageously. In addition, the memory cell can be manufactured particularly easily. Advantages and advantageous embodiments of the fourth aspect of the invention are to be viewed as advantages and advantageous embodiments of the first aspect, the second aspect and the third aspect of the invention and vice versa.

It has proven to be particularly advantageous if the memory cell according to the fourth aspect of the invention has a rod element formed separately from the layer structure, which is arranged in the layer structure and is therefore at least in a length region of the rod element, in particular in the circumferential direction of the rod element and thus of the memory cell. is surrounded by the layer structure, in particular completely all around, the circumferential direction of the rod element and thus of the memory cell running around the longitudinal direction of the memory cell. Heat can be particularly advantageously dissipated from the layer structure, in particular from its interior, via the rod element and/or heat can be introduced particularly advantageously into the layer structure, in particular into its interior, via the rod element, so that a particularly effective and efficient temperature control of the memory cell can be achieved is.

A further embodiment of the fourth aspect of the invention is characterized in that the anode layer and / or the cathode layer has a base body and is formed in one piece with the base body, separated from one another in the circumferential direction of the rod element and thus of the memory cell and in the circumferential direction of the memory cell and thus of the rod element has successive tabs. A particularly advantageous, in particular particularly large-area, electrical contacting of the anode layer and/or the cathode layer can be achieved via the tabs, so that, for example, heat can be dissipated particularly advantageously from the anode layer or from the cathode layer and/or introduced into the anode layer or into the cathode layer . This means that particularly effective and efficient temperature control can be achieved.

In a further, particularly advantageous embodiment of the fourth aspect of the invention, it is provided that at least some of the tabs, i.e. at least first of the tabs, protrude from the base body towards the rod element, are bent relative to the base body and, in particular directly, electrically connected are contacted with the rod element. In particular, the first tabs are bent about an imaginary bending axis relative to the base body. The bending axis runs, for example, in a plane which runs perpendicular to the longitudinal direction of the rod element, with the circumferential direction extending in the plane and with, for example, the base body extending in the plane. Thus, for example, the storage cell can provide electrochemical energy stored in it via the rod element. In addition, a particularly advantageous heat dissipation and/or a particularly advantageous introduction of heat, in particular via the rod element, can be realized, so that a particularly effective and efficient temperature control can be achieved.

It has also proven to be particularly advantageous in the fourth aspect of the invention if at least some of the tabs, for example at least second of the tabs, move from the base body towards a layer structure in the circumferential direction of the memory cell at least in a length range of the layer structure, in particular Special completely circumferential, surrounding housing jacket of the cell housing protrude, for example, are bent about an imaginary bending axis relative to the base body and are electrically contacted with the housing jacket, in particular directly. Thus, for example, the memory cell can provide electrical energy stored in it via the housing jacket. In addition, a particularly advantageous heat dissipation and/or a particularly advantageous introduction of heat via the housing jacket can be achieved, so that a particularly effective and efficient temperature control can be achieved.

Preferably, in the fourth aspect of the invention, the rod element has a channel through which a preferably liquid temperature control agent can flow, so that, for example, the layer structure can be particularly advantageously tempered via the rod element by means of the temperature control agent flowing through the channel and thus the rod element, in particular over its interior. It is conceivable that an outer lateral surface, in particular of the rod element and/or the layer structure and/or the electrode coil, is used for temperature control, in particular cooling, for example with or through immersion cooling, which creates a particularly large area for heat exchange and thus for Temperature control can be used.

Finally, it has proven to be particularly advantageous if, in the fourth aspect of the invention, the memory cell is provided with a spring element, in particular designed as a mechanical spring, by means of which the layer structure is subjected to a spring force along the stacking direction along which the stacks are arranged one on top of the other and thereby is kept in a compressed state. The background to this embodiment is, in particular, that when the memory cell is charged, the anode layer is formed and in particular becomes successively thicker, so that when the memory cell is charged and discharged, there is a fluctuation in the thickness of the layer structure, in particular along the stacking direction, that is to say in the longitudinal direction of the memory cell. This can be the case in particular if the memory cell is designed as a solid-state accumulator, which is also referred to as a solid-state cell. This thickness fluctuation can be compensated for by the spring element, which can advantageously keep the layer structure compressed both in the charged state and in the discharged state of the memory cell. This makes it possible to avoid undesirable relative movements between the elements of the layer structure.

A fifth aspect of the invention relates to a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, which has an electrical energy storage device which has storage cells electrically connected to one another according to the first aspect, the second aspect, the third aspect and the fourth aspect of the invention. In other words, the electrical energy storage can have storage cells that are electrically connected to one another and manufactured using a method according to the first aspect of the invention. Advantages and advantageous embodiments of the fifth aspect of the invention are to be viewed as advantages and advantageous embodiments of the first aspect, the second aspect, the third aspect and the fourth aspect of the invention and vice versa.

• 1 eine schematische Perspektivansicht einer ersten Ausführungsform einer Speicherzelle für einen elektrischen Energiespeicher eines Kraftfahrzeugs;
• 2 eine weitere schematische Perspektivansicht der Speicherzelle gemäß der ersten Ausführungsform;
• 3 eine schematische Explosionsansicht der Speicherzelle gemäß der ersten Ausführungsform;
• 4 eine schematische Explosionsansicht einer zweiten Ausführungsform der Speicherzelle;
• 5 eine schematische und geschnittene Seitenansicht der Speicherzelle;
• 6 ausschnittsweise eine weitere schematische und geschnittene Seitenansicht der Speicherzelle;
• 7 eine vergrößerte Darstellung eines in 5 mit M bezeichneten Bereichs;
• 8 eine schematische Perspektivansicht einer dritten Ausführungsform der Speicherzelle;
• 9 eine weitere schematische Perspektivansicht der dritten Ausführungsform der Speicherzelle;
• 10 ausschnittsweise eine schematische und geschnittene Perspektivansicht einer vierten Ausführungsform der Speicherzelle;
• 11 ausschnittsweise eine weitere schematische und geschnittene Perspektivansicht der vierten Ausführungsform der Speicherzelle;
• 12 eine schematische Explosionsansicht eines Stapels einer fünften Ausführungsform der Speicherzelle;
• 13 eine schematische Explosionsansicht des Stapels einer sechsten Ausführungsform der Speicherzelle;
• 14 ausschnittsweise eine schematische und geschnittene Perspektivansicht der Speicherzelle;
• 15 eine schematische und geschnittene Perspektivansicht einer siebten Ausführungsform der Speicherzelle;
• 16 eine schematische Perspektivansicht einer Federeinrichtung der siebten Ausführungsform der Speicherzelle;
• 17 eine schematische Perspektivansicht der Federeinrichtung einer achten Ausführungsform der Speicherzelle;
• 18 eine schematische Perspektivansicht der Federeinrichtung einer neunten Ausführungsform der Speicherzelle;
• 19 eine schematische und geschnittene Perspektivansicht einer zehnten Ausführungsform der Speicherzelle;
• 20 eine schematische Perspektivansicht eines Bauelements einer elften Ausführungsform der Speicherzelle;
• 21 eine schematische Perspektivansicht eines Schichtaufbaus der elften Ausführungsform der Speicherzelle;
• 22 eine schematische Perspektivansicht des Schichtaufbaus gemäß 21 in dem Bauelement gemäß 20;
• 23 eine schematische, geschnittene und perspektivische Draufsicht einer zwölften Ausführungsform der Speicherzelle;
• 24 eine schematische, geschnittene und perspektivische Unteransicht der zwölften Ausführungsform der Speicherzelle;
• 25 eine schematische und geschnittene Perspektivansicht einer dreizehnten Ausführungsform der Speicherzelle;
• 26 eine schematische Darstellung eines Verfahrens zum Herstellen der Speicherzelle;
• 27 eine schematische Perspektivansicht eines Elektrodenwickels der Speicherzelle;
• 28 eine schematische Perspektivansicht eines Schichtaufbaus einer vierzehnten Ausführungsform der Speicherzelle;
• 29 eine schematische Perspektivansicht einer Elektrodeneinrichtung einer fünfzehnten Ausführungsform der Speicherzelle;
• 30 eine weitere schematische Perspektivansicht der Elektrodeneinrichtung gemäß 29;
• 31 eine schematische Seitenansicht der Elektrodeneinrichtung gemäß einer sechzehnten Ausführungsform der Speicherzelle;
• 32 eine schematische Perspektivansicht der Elektrodeneinrichtung gemäß einer siebzehnten Ausführungsform der Speicherzelle;
• 33 eine schematische Perspektivansicht eines Teils der Elektrodeneinrichtung gemäß der siebzehnten Ausführungsform; und
• 34 ausschnittsweise eine schematische Perspektivansicht der Elektrodeneinrichtung gemäß einer achtzehnten Ausführungsform der Speicherzelle.

Further details of the invention result from the following description of preferred exemplary embodiments with the associated drawings. This shows:

• 1 a schematic perspective view of a first embodiment of a storage cell for an electrical energy storage device of a motor vehicle;
• 2 another schematic perspective view of the memory cell according to the first embodiment;
• 3 a schematic exploded view of the memory cell according to the first embodiment;
• 4 a schematic exploded view of a second embodiment of the memory cell;
• 5 a schematic and sectional side view of the memory cell;
• 6 a detail of a further schematic and sectional side view of the memory cell;
• 7 an enlarged view of one in 5 area designated M;
• 8th a schematic perspective view of a third embodiment of the memory cell;
• 9 a further schematic perspective view of the third embodiment of the memory cell;
• 10 a detail of a schematic and sectioned perspective view of a fourth embodiment of the memory cell;
• 11 a detail of a further schematic and sectioned perspective view of the fourth embodiment of the memory cell;
• 12 a schematic exploded view of a stack of a fifth embodiment of the memory cell;
• 13 a schematic exploded view of the stack of a sixth embodiment of the memory cell;
• 14 a detail of a schematic and sectioned perspective view of the memory cell;
• 15 a schematic and sectioned perspective view of a seventh embodiment of the memory cell;
• 16 a schematic perspective view of a spring device of the seventh embodiment of the memory cell;
• 17 a schematic perspective view of the spring device of an eighth embodiment of the memory cell;
• 18 a schematic perspective view of the spring device of a ninth embodiment of the memory cell;
• 19 a schematic and sectional perspective view of a tenth embodiment of the memory cell;
• 20 a schematic perspective view of a component of an eleventh embodiment of the memory cell;
• 21 a schematic perspective view of a layer structure of the eleventh embodiment of the memory cell;
• 22 a schematic perspective view of the layer structure according to 21 in the component according to 20 ;
• 23 a schematic, sectional and perspective top view of a twelfth embodiment of the memory cell;
• 24 a schematic, sectional and perspective bottom view of the twelfth embodiment of the memory cell;
• 25 a schematic and sectional perspective view of a thirteenth embodiment of the memory cell;
• 26 a schematic representation of a method for producing the memory cell;
• 27 a schematic perspective view of an electrode coil of the memory cell;
• 28 a schematic perspective view of a layer structure of a fourteenth embodiment of the memory cell;
• 29 a schematic perspective view of an electrode device of a fifteenth embodiment of the memory cell;
• 30 a further schematic perspective view of the electrode device according to 29 ;
• 31 a schematic side view of the electrode device according to a sixteenth embodiment of the memory cell;
• 32 a schematic perspective view of the electrode device according to a seventeenth embodiment of the memory cell;
• 33 a schematic perspective view of a part of the electrode device according to the seventeenth embodiment; and
• 34 a detail of a schematic perspective view of the electrode device according to an eighteenth embodiment of the memory cell.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

1 and 2 show in a respective, schematic perspective view a storage cell 1 for an electrical energy storage of a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car. The motor vehicle is also simply referred to as a vehicle. In its fully manufactured state, the electrical energy storage device has the storage cell 1 as well as several additional storage cells, whereby the previous and following statements regarding the storage cell 1 can easily be transferred to the other storage cells of the electrical energy storage device and vice versa. In particular, the memory cells are electrically connected to one another. The memory cell 1 is also simply referred to as a cell. Electrical energy, in particular electrochemically, can be stored by means of the storage cell 1, so that electrical energy, in particular electrochemically, can be stored by means of the electrical energy storage device or in the electrical energy storage device. 1 and 2 show a first embodiment of the memory cell 1, which in the first embodiment is designed as a round cell. The memory cell 1 has a cell housing 2, which delimits, in particular directly, a receiving area, also referred to as a receiving space or designed as a receiving space, in particular in such a way that an inside or an inner circumferential lateral surface of the cell housing 2 delimits the receiving area, in particular directly. From a synopsis of 1 and 2 It can be seen that the cell housing 2 has a first housing jacket 3, also referred to as a jacket, and a first housing jacket, referred to as a cover 4 Cover element and a second cover element referred to as bottom 5. The receiving area is limited in the longitudinal direction of the storage cell 1 and thus of the cell housing 2 on a first side S1 of the storage cell 1 by the cover 4 and on a second side S2 of the storage housing 2 or the storage cell 1 by the bottom 5. The longitudinal direction of the memory cell 1 is illustrated by a double arrow 6. It can be seen that the cover elements are spaced apart from one another in the longitudinal direction of the memory cell 1. The housing jacket 3 is arranged between the cover elements when viewed along the longitudinal direction of the memory cell 1. In the circumferential direction of the memory cell 1 extending around the longitudinal extension direction of the memory cell 1, the circumferential direction of which is illustrated by a double arrow 7, the receiving area is delimited, in particular completely circumferentially, by the housing jacket 3. In the installed position of the electrical energy storage and thus the storage cell 1, for example, the side S1 points upwards in the vertical direction of the motor vehicle, which is also simply referred to as a vehicle, and in the installed position of the electrical energy storage and thus the storage cell 1, for example, the side S2 points downwards in the vertical direction of the vehicle. Thus, for example, the side S1 is a top side, and the side S2 is, for example, a bottom side of the storage cell 1. The electrical energy storage and thus the storage cell 1 assume their respective installation position in the completely manufactured state of the motor vehicle equipped with the electrical energy storage. Thus, for example, the longitudinal extension direction illustrated by the double arrow 6 runs in the vertical direction of the vehicle.

3 shows the memory cell 1 according to the first embodiment in a schematic exploded view. In principle, it would be conceivable that the housing jacket 3 and the cover 4 are designed separately from one another and connected to one another, for example the housing jacket 3 can be connected to the cover 4 by crimping. At the in 3 However, in the first embodiment shown, it is provided that the housing jacket 3 and the cover 4 are formed in one piece with one another, that is to say from a single piece and are therefore formed integrally. Furthermore, it can be seen that the cover 4 has, for example, ventilation holes 8 designed as through openings, through which, for example, a gas can escape from the receiving area, in particular to an environment 9 of the storage cell 1.

The ventilation holes 8 are formed, for example, by punching. It is possible that, for example, material elements designed as pieces of sheet metal that were punched out to form the ventilation holes 8 are still held on the cover 4. When the gas flows out, it is deflected away from a cooling channel, for example, by means of the material elements, so that the material elements act as a deflector or deflector. Instead of the vent opening 8, a predetermined breaking point designed, for example, as a notch is conceivable, which bursts when the pressure increases and releases a flow cross section, i.e. a through opening through which the gas can flow out. It is conceivable that in the event of a burst, a material element such as a piece of sheet metal gets stuck, which acts as a deflector to guide or direct or reject the outflowing gas.
Furthermore, it can be seen that the memory cell 1 has an electrode device 10 which is accommodated in the receiving area and thus in the cell housing 2. In the first embodiment, the electrode device 10 is an electrode wrap, which is also referred to as a jelly roll. The electrode winding has, in particular at least or precisely, two electrodes, which are wound, in particular spirally, to form the electrode winding, in particular around a particularly imaginary winding axis. Furthermore, the electrode winding comprises a separator which is arranged between the electrodes and is wound with the electrodes, in particular spirally, to form the electrode winding, in particular around the imaginary bending axis. The winding axis mentioned runs in the longitudinal direction of the storage cell 1 or coincides with the longitudinal direction of the storage cell 1, so that the circumferential direction illustrated by the double arrow 7 runs around the winding axis. The imaginary winding axis is in 3 shown and labeled 11.

A method for producing the memory cell 1, in particular according to the first embodiment, will be described below. In the method, for example, a stack is provided which comprises the electrodes and the separator, the stack being formed in that the electrodes are arranged one on top of the other along a stacking direction and in that the separator is arranged between the electrodes along the stacking direction. In the method, the stack is wound around the imaginary winding axis 11 onto a rod element 12 formed separately from the stack, whereby the electrode coil (electrode device 10) is produced from the stack. The electrode coil is arranged in the housing jacket 3, in particular in such a way that the electrode coil is moved, in particular inserted, into the housing jacket 3 in the longitudinal direction of the memory cell 1. The housing jacket 3 is therefore a first housing element of the storage housing 2. It can be seen that the electrode winding is in a longitudinal direction direction of the memory cell 1, illustrated by an arrow 13, is at least predominantly covered by the cover 4. In a second direction, which runs in the longitudinal direction of the memory cell 1 and is illustrated by an arrow 14 and is opposite to the first direction, the electrode coil is overlapped and thus covered by the base 5. In the installed position of the electrical energy storage device, the first direction points upwards in the vertical direction of the vehicle, and the second direction points downwards in the vertical direction of the vehicle.

In the method, the rod element 12 does not need to be removed from the electrode winding, whereby the electrode winding and the rod element 12 arranged in the electrode winding form a structural unit 15, which is arranged in the housing element (housing jacket 3) and is used as part of the completely or finished memory cell 1 . In particular, the structural unit 15 is arranged in the housing jacket 3 in such a way that the structural unit 15 is inserted into the housing jacket 3 in the longitudinal direction of the memory cell 1. It is conceivable that the electrode winding and the rod element 12 are arranged together, that is to say at the same time, in the housing jacket 3.

In the first embodiment, the rod element is cylindrical on the outer circumference, so that the rod element 12 is designed as a tube. In addition, in the first embodiment, the rod element 12 is used as a line element for guiding or directing a preferably liquid temperature control agent. For this purpose, the rod element 12, in particular in its interior, has a channel 16, also referred to as a temperature control channel, through which the temperature control medium can flow, in particular in the longitudinal direction of the storage cell 1. By means of the temperature control agent, the temperature of the electrode coil can be controlled particularly effectively and efficiently via the rod element 12, which is also referred to as a line element or line, in such a way that heat can be exchanged between the electrode coil and the temperature control agent flowing through the channel 16 via the rod element 12. The cover 4 and the base 5 can be used as connection elements of the memory cell 1, the connection elements also being referred to as terminals or connections. A first of the connection elements is or forms, for example, an electrical positive pole of the memory cell 1, with the other of the connection elements, for example, forming an electrical negative pole of the memory cell 1. One of the electrodes is, for example, a cathode or can be used as a cathode, for example the other of the electrodes is an anode or can be used as an anode. In this case, for example, the electrical negative pole is electrically contacted, in particular connected, to the anode, and the electrical positive pole is, for example, electrically contacted or connected to the cathode. Because, for example, the cover 4 is connected to the housing element (housing jacket 3) and vice versa, the cover 4 and the housing element have the same electrical polarity.

In the first embodiment, the housing jacket 3 is formed in one piece, that is to say formed from a single piece. Furthermore, it is conceivable that the housing jacket 3 (the housing element) is designed or usable as a, in particular further, connection element, which can be electrically contacted, in particular connected, to the anode or the cathode, for example. In particular, the ventilation holes 8 can be used to remove said gas from the receiving area if, for example, a thermal event takes place in or on the storage cell 1. This prevents the storage cell 1 from inflating, in particular laterally, since the gas or a pressure caused by the gas, in particular in the receiving area, can escape from the receiving area and thus from the storage cell 1 on a predetermined path. Alternatively or in addition to the ventilation holes 8 designed as through openings, it is conceivable that the storage cell 1, in particular the storage housing 2 and in particular the cover 4, has at least one predetermined breaking point, for example referred to as a notch, at which point when it is in the receiving area a pressure increase resulting in particular from a thermal event occurs, in particular first, ruptures and, for example, bursts, so that in particular lateral inflation of the storage cell 1, also simply referred to as a cell, can be avoided. In 3 Insulators of the memory cell 1 are designated 17, 18, 19 and 20. In particular, in the context of the present disclosure, an insulator is to be understood as meaning a non-conductor whose electrical conductivity is less than 10 ^-8 S × cm ^-1 . The insulators 17, 18, 19 and 20 are, for example, between electrically conductive areas such as the housing element (housing jacket 3), which is also referred to as the lateral surface or forms a lateral surface of the storage cell 1, the rod element 12, which is also referred to as a clamping tube or is used as a clamping tube, which is also called Plate or bottom plate designated bottom 5, a contact and a pressure plate 21 of the memory cell 1 are arranged. It is conceivable to design the insulators as an “E” or “F” profile, i.e. to design the outer insulators and the inner insulators in one piece. The memory cell 1 also has a conductor element 22, through which, for example, the aforementioned contact is formed can be. In particular, the conductor element 22 is formed separately from the electrode device 11 and separately from the connections. For example, the pressure plate 21 is electrically connected to the cover 4, which is presently designed as a positive pole, via the conductor element 22. In particular, the conductor element 22 can be arranged between the pressure plate 21 and the cover 4. Very preferably, the conductor element 22 has an electrical resistance which changes as the temperature of the conductor element 22 changes. In particular, the conductor element 22 can be designed as a PTC element. If, for example, there is a strong increase in the temperature of the memory cell 1, in particular as a result of a thermal event, then, for example, a temperature of the conductor element 22 is increased, as a result of which the electrical resistance of the conductor element 22 is increased. Then the conductor element 22 becomes a resistor, so that the pressure plate 21 and thus, for example, the electrode device 10 is no longer electrically connected to the cover 4 via the conductor element 22, and therefore the electrode device 10 is electrically separated from the cover 11. The pressure plate 21 has recessed areas 23, which are designed, for example, as beads of the pressure plate 21.

The previously mentioned contact is in 3 marked 24. The contact 24 is a contacting element, also referred to as a contact element, which is designed separately from the cover 4 and separately from the electrode device 10. For example, the electrode device 10, in particular at least or exactly one of the electrodes of the electrode device 10, is electrically connected to the cover 4 or to the connection formed by the cover 4 via the contacting element. For example, the pressure plate 21 is electrically and preferably also mechanically connected to the contact 24, for example the pressure plate 21 is connected to the contact 24 by welding, in particular by spot welding. Spot welding is also simply referred to as spotting. Thus, for example, the anode or the cathode is electrically connected to the cover 4 or to the connection formed by the cover 4 via the contact 24 and the pressure plate 21. In particular, the regions 23 of the pressure plate 21, which are presently designed as depressions, can realize a welding together, in particular points, between the pressure plate 21 and the contact 24, in particular locally. In particular, it is conceivable that the pressure plate 21 is dotted on the contact 24. The pressure plate 21 is curved, for example in such a way that when it bursts, tearing favors deformation. The contact 24 has at least one or more through openings 25, which function as ventilation holes. The aforementioned gas can escape from the receiving area via the through openings 25, in particular to the surroundings 9 of the storage cell 1. The contact 24 is curved, for example in such a way that it resists deformation when bursting in order to prevent the tearing of a connection, in particular designed as a weld between the contact 24 and the pressure plate 21 to favor. In the event of heat development in the memory cell 1, in particular in the receiving area, resulting, for example, from a thermal event in or on the storage cell 1, with the particularly hot gas resulting, for example, from this heat development, the pressure plate 21 deforms, in particular in such a way that the pressure plate 21 , in particular in the direction of the lid 4, inflates in such a way that points at which the pressure plate 21 is connected to the contact 24, which is presently designed as a contact plate, in particular welded and in particular spot welded, tear or are destroyed, thus so that the previously provided , electrical connection between the pressure plate 21 and the contact 24 is released, so that the pressure plate 21 is no longer electrically connected to the contact 24. This allows the hot gas to escape from the receiving area and no more current can be conducted between the contact 24 and the pressure plate 21. It is advantageous if only one welding point is provided in order to securely release the connection between the contact 24 and the pressure plate 21. In this area or areas, for example, a smaller wall thickness, in particular sheet metal thickness, is provided than in adjoining areas in order to enable tearing.

In the first embodiment, for example, the cathode is electrically connected to the cover 4, in particular via the contact 24 and the pressure plate 21. Furthermore, in the first embodiment, for example, it is provided that the anode is electrically connected to the base 5, in particular via the rod element 12. The reverse is easily conceivable. The rod element 12 is therefore used on the one hand as a clamping tube or support structure for producing the electrode coil. On the other hand, the rod element 12 is used in order to be able to control the temperature of the electrode coil particularly advantageously via the rod element 12. In addition, the rod element 12 is used as a contact or contact element or contacting element, since the rod element 12 is electrically connected to the anode and electrically to the base 5, so that the anode is connected to the base 5 via the rod element 12. In 3 For example, 26 denotes a further insulator, by means of which, for example, the ground 5 or electrical negative poles are electrically or galvanically separated from the Housing element (housing jacket 3) or isolated from the electrical positive pole of the memory cell 1, that is, separated. In the first embodiment, the base 5 is formed separately from the cover 4 and separately from the housing element (housing jacket 3). In particular, it can be provided that the rod element 12 is formed in one piece with the base 5. Thus, for example, the rod element 5 is formed separately from the cover 4 and separately from the housing jacket 3.

4 shows a second embodiment of the memory cell 1. In the second embodiment, for example, the housing jacket 3, the rod element 12 and the base 5 are formed in one piece with one another, that is to say formed from a single piece. In other words, for example, the rod element 12, the housing jacket 3 and the base 5 are formed by a one-piece and therefore integrally manufactured body, which is a monoblock or is formed by a monoblock. The cover 4 is designed separately from the body mentioned and is connected, for example, to the housing jacket 3, in particular by crimping. In the second embodiment, too, the housing jacket 3 completely surrounds the electrode coil in the circumferential direction (double arrow 7) of the memory cell 1, in particular over the entire length of the electrode coil (electrode device 10) running in the longitudinal direction of the memory cell 1. It is therefore particularly conceivable that, for example, the anode is electrically connected to the rod element 12 and thus the rod element 12 to the housing jacket 3 and the base 5, so that, for example, the base 5 and the housing jacket 3 form the electrical negative pole. The cathode is, for example, electrically connected to the cover 4, so that the cover 4 forms, for example, the electrical positive pole. Furthermore, it would be conceivable for the rod element 12, the housing jacket 3 and the base 5 to be designed separately from one another and connected to one another, in particular welded.

5 shows a schematic and sectional side view of the memory cell 1, for example according to the first embodiment, according to the second embodiment or according to a further embodiment. Particularly good looking 5 It can be seen that the rod element 12 has an inner circumferential surface 27, which extends from the electrode winding along a direction perpendicular to the longitudinal extension direction (double arrow 6) of the memory cell 1 and in 5 direction illustrated by a double arrow 28, the longitudinal direction of extension also being referred to as the axial direction and the direction illustrated by the double arrow 28 also being referred to as the radial direction of the memory cell 1. In the radial direction of the storage cell 1 towards the outside, the channel 6 is delimited, in particular directly, by the inner circumferential lateral surface 27 of the rod element 12. Out of 5 It can be seen that the rod element 12, on its inner side 29, which faces away from the electrode winding in particular in the radial direction of the storage cell 1 and faces the channel 6 and which is formed in particular by the inner circumferential lateral surface 27, has two in the axial direction, that is to say in the longitudinal direction of the rod element 12 and thus the memory cell 1, has grooves 30 and 31 spaced apart from one another, which in particular run completely around the circumferential direction of the memory cell 1 and thus of the rod element 12, which extends around the axial direction of the memory cell 1 and thus of the rod element 12 and is illustrated by the double arrow 7. The respective groove 30, 31 is therefore preferably designed as an annular groove. A respective sealing element 32, 33 is arranged in the respective groove 30, such that a first portion of the respective sealing element 32, 33 is arranged in the respective groove 30, 31 and a respective, second portion of the respective sealing element 32, 33 from the respective Groove 30, 31 protrudes and thus projects in particular into the channel 6 of the rod element 12. The sealing elements 32 and 33 are preferably made of rubber. In particular, the respective sealing element 32, 33 is designed separately from the rod element 12. Furthermore, it is conceivable that two pairs of seals are provided, with each pair of seals having two seals such as the sealing elements 32 and 33.

For example, from the side S1 in the second direction illustrated by the arrow 14, a first dome can be inserted into the channel 6 and thus into the rod element 12, and for example from the second side S2 in the second direction illustrated by the arrow 13, In the first direction, a second dome can be inserted into the channel 6 and thus into the rod element 12. The respective dome is also referred to as a connection dome and the temperature control medium can flow through it. The temperature control agent can be introduced into the channel 6 via one of the domes, and the temperature control agent can be discharged from the channel 6 via the other of the domes. By means of the sealing elements 32 and 33, the domes inserted at least partially into the channel 6 can be sealed against the rod element 12, in particular in such a way that one of the domes is sealed against the rod element 12 by means of the sealing element 32 and the other of the domes is sealed against the rod element 12 by means of the sealing element 33. For this purpose, for example, the sealing element 32 rests, in particular directly, on one dome and, in particular directly, on the rod element 12, and for example, the sealing element 33 rests on the one hand, in particular directly, on the other Dom and on the other hand, in particular directly, on the rod element 12.

6 shows a detail in a further schematic and sectioned side view of the memory cell 1, for example according to the first embodiment, according to the second embodiment, according to the other embodiment or according to a still further, different embodiment. An inner insulator between an inner housing and components 34 of the memory cell 1 is designated 35, in the present case, for example, the inner housing being formed by the rod element 12. An outer insulator between an outer housing and the components 34 is designated 36, the outer housing being formed, for example, by the housing jacket 3. Particularly good looking 6 The present upper groove 30 can be seen, which is produced, for example, by crimping, in particular of the rod element 12. The housing jacket 3 has an indentation 37 which projects into the receiving area and is formed, for example, by crimping, in particular of the housing jacket 3. The recording area is in 5 and 6 recognizable and marked 38. Furthermore, a second indentation 39 which projects into the receiving area 38 is formed by the groove 30. It can be seen that the components 34 are held together or held together by means of the indentations 37 and 39, in particular in such a way that, in particular in the longitudinal direction of the storage cell 1, the components 34 are between the respective indentation 37, 39 on the one hand and the cover 4 and/or the rod element 2 and/or the outer housing on the other hand are clamped.

A further, inner insulator is designated 40, the further insulator 40 being arranged between the contact 24 and the pressure plate 21.

For example, the contact 24, in particular in its center, has a predetermined breaking point 41, which is realized, for example, by a, in particular local, reduction in wall thickness or thinning of the material. In particular, the predetermined breaking point 41 is realized by a notch in the contact 24. If, for example, due to a thermal event in the storage cell 1, the aforementioned gas arises, in particular in the receiving area 38, there is an increase in pressure in the receiving area 38, so that a pressure prevailing in the receiving area 38 increases. The pressure, for example, raises the pressure plate 21, in particular in such a way that an electrical connection between the pressure plate 21 and the contact 24 is interrupted, in particular completely, so that as a result the pressure plate 21 and the contact 24 are no longer electrically connected to one another.

Furthermore, in 6 a further insulator is designated 42, which is arranged, for example, in the present case between the rod element 12 and the housing jacket 3. How particularly good in combination with 2 can be seen, the bottom 5 has a predetermined breaking point 43, for example formed by a notch or designed as a notch, which acts as overpressure protection in particular in the event of a thermal event, i.e. in the event of an increase in pressure in the receiving area 38. The predetermined breaking point 43 can be designed as a complete circle or as a circular segment, i.e. as a circular segment or circular ring. In particular, the predetermined breaking point 43 is formed by a local thinning of the material or wall thickness reduction, in particular of the base 5, so that, for example, the base 5 tears or bursts at the predetermined breaking point 43 when the pressure prevailing in the receiving area 38 exceeds a limit gets destroyed. As a result, the gas can escape from the storage cell 1.
7 shows an enlarged view of an in 5 area marked M. Particularly good looking 7 The lower sealing element 33 and the lower groove 31 can be seen. They look particularly good 7 It can also be seen that, for example, the base 5 is formed in one piece with the housing jacket 3, with the insulator 42 being arranged between the rod element 12 and the housing base 5 and between the rod element 12 and the housing jacket 3.

8th and 9 each show a third embodiment of the memory cell 1 in a schematic perspective view. In the third embodiment, the memory cell 1 is not designed as a round cell, but as a prismatic cell. It can be seen that the memory cell has a hexagonal cross section. Other, polygonal cross sections are of course possible.

10 and 11 show a detail in a schematic and sectioned perspective view of a fourth embodiment of the memory cell 1, in particular the electrode device 10. In the fourth embodiment, for example, the electrode device 10 is not an electrode coil, but a layer structure which is arranged in the cell housing 2, that is, in the receiving area 38 is. In particular, the layer structure is formed separately from the cell housing 2. The layer structure has a plurality of stacks 44 arranged one on top of the other along a stacking direction and thus stacked on top of one another, the stacking direction being illustrated by a double arrow 45. It can be seen that the stacking direction is in The longitudinal direction of the memory cell 1 extends, in particular coinciding with the longitudinal direction of the memory cell 1. The respective stack 44 has a plurality of layers arranged one on top of the other along the stacking direction and thus stacked on top of one another. In the fourth embodiment, a first of the layers is a cathode layer 46, also referred to as an anode. A second of the layers is an anode layer 47, also simply referred to as an anode. A third of the layers is a separator layer 48, also simply referred to as a separator, which runs along the stacking direction between the cathode layer 46 and the anode layer 47 is arranged. The anode layer 47 is or forms an anode and thus, for example, an electrical negative pole of the memory cell 1, and the cathode layer 46 is or forms a cathode and thus an electrical positive pole of the memory cell 1. In other words, the anode and the cathode are electrodes of the electrode device 10 and thus the memory cell 1. It is conceivable that a further separator layer can be arranged between two stacks 44 which are immediately successive or adjacent along the stacking direction, so that, for example, between the cathode layer 46 of one of the stacks 44 and the anode layer 47 of another of the stacks 44 a respective further separator layer is arranged, with one stack 44 and the other stack 44 being adjacent in a stacking direction. Furthermore, for example, the respective stack 44 includes a contact layer 49, which is also simply referred to as a contact. The contact layer 49 can thus be a further or fourth layer of the stack 44. For example, the contact layer 49 is electrically connected to the cathode layer 46.

In 10 an extension direction is illustrated by a double arrow 50, the extension direction running in a plane which is perpendicular to the axial direction of the memory cell 1, i.e. perpendicular to the longitudinal extension direction of the memory cell 1. The extension direction thus runs perpendicular to the axial direction, that is to say perpendicular to the longitudinal extension direction of the memory cell 1, so that, for example, the extension direction is the radial direction of the memory cell 1 or runs with the radial direction of the memory cell 1 or runs in the radial direction of the memory cell 1.

The contact layer 49 is also formed as a first contact layer. Since the contact layer 49 is electrically connected to the cathode, the cathode and the contact layer 49 can be viewed or referred to as a cathode or cathode layer, thus the contact layer 49 is a second cathode layer of the stack 44, the first cathode layer 46 and the second cathode layer being present are designed separately from each other and electrically connected to one another. Furthermore, it would be conceivable if the first cathode layer 46 and the second cathode layer were formed in one piece with one another. The contact layer 51 is electrically connected to the anode layer 47. It is therefore conceivable that the anode layer 47 and the contact layer 51 form or are an anode layer or the contact layer 51 can be a second anode layer of the stack 44 since the contact layer 51 is electrically connected to the anode layer 47. In the present case, the first anode layer 47 and the second anode layer are formed separately from one another and are electrically connected to one another. Alternatively, it would be conceivable for the first anode layer 47 and the second anode layer to be formed in one piece with one another.

In the fourth embodiment, the second anode layer (contact layer 51) has a base body which extends in particular in the plane mentioned and tabs 52 which are formed in one piece with the base body and are separated from one another in the circumferential direction of the memory cell 1 and at least partially successive in the circumferential direction of the memory cell 1, which a respective imaginary bending axis, in particular extending in the plane, is bent relative to the base body and in the present case protrudes from the base body towards the housing element 3 and is electrically contacted, in particular connected, to the housing element 3. Out of 4 It can be seen that the tabs 52 of the second anode layers of the layer structure overlap each other like fish scales or bricks, whereby a particularly large and therefore particularly advantageous electrical contact can be achieved, in particular with the housing jacket 3. In addition, this can ensure particularly advantageous heat dissipation. For example, it is provided that one end of the layer structure ends with the anode or with an anode layer and the other end with the cathode or a cathode layer.

10 shows a first variant of the fourth embodiment. In the first variants of the fourth embodiment, the respective second cathode layer also has a respective base body and second tabs 53 which are formed in one piece with the base body of the respective second cathode layer and are separated from one another in the circumferential direction of the memory cell 1 and follow each other in the circumferential direction of the memory cell 1, which of protrude from the base body of the respective second cathode layer towards the outer circumferential housing jacket 3. For example, if the tabs 52 are electrically connected to the housing jacket 3 are connected, for example there is no electrical connection between the tabs 53 and the housing jacket 3. Furthermore, it is conceivable that the tabs 53 are electrically connected to the housing jacket 3, in which case, for example, there is no electrical contact between the same housing jacket 3 and the tabs 52. In principle, it is conceivable that the housing jacket 3 is formed in one piece. However, it would be conceivable for the housing jacket 3 to have at least or exactly two jacket parts that are designed separately from one another and are at least indirectly connected to one another, which are, for example, electrically insulated from one another. It would be conceivable that the tabs 52 protrude from the base body of the second anode layer towards a first of the jacket parts and are electrically contacted, in particular connected, to the first jacket part. Furthermore, it would be conceivable that, for example, the tabs 53 would then protrude from the base body of the second cathode layer towards a second of the jacket parts, in which case, for example, the tabs 53 could then be electrically contacted, in particular connected, to the second jacket part. Then, for example, the first jacket part can form the electrical negative pole, in which case, for example, the second jacket part can then form the electrical positive pole of the memory cell 1. The tabs 53 of the layer structure also overlap each other, for example like fish scales or bricks. The respective separator layer 48, for example, projects beyond the anode layers and cathode layers of the stack 44 along the extension direction illustrated by the double arrow 50, for example inwards and thus, for example, towards the stack element 12 and/or outwards and thus, for example, towards the housing jacket 3, so that, for example When the tabs 52 and 53 are bent, the separator layers 47 of the layer structure prevent electrical contact between the respective anode layer and the respective cathode layer, that is, it is avoided. In the first variant, there are no scales or tabs on the inside, so to speak, otherwise the structure is identical. This means that the stack starts at the bottom with copper (anode) and ends at the top with aluminum (cathode) and on the side there can be aluminum or copper (depending on which scales are desired on the edge) or vice versa. The stack starts at the bottom with aluminum and ends at the top with copper, and either aluminum or copper can be provided on the sides, depending on which scales or tabs are desired. In general, copper is advantageous because it conducts heat and electricity very well.

At the in 11 shown, second variant of the fourth embodiment, the cathodic tabs 53 protrude from the base bodies of the second cathode layers towards the housing jacket 3, the tabs 53 being electrically contacted or connected to the housing jacket 3. Thus, for example, the housing jacket 3 is or forms the cathode. However, the anodic tabs 52 project away from the base bodies of the second anode layers and towards the rod element 12, the anodic tabs 52 being connected to the in 11 Rod element 12, not shown, is electrically contacted, in particular connected. Thus, for example, the rod element 12 forms the electrical negative pole. At the in 10 and 11 In the variants of the fourth embodiment shown, both the tabs 52 and the tabs 53 are bent upwards and thus in the direction of the lid 4. This is done, for example, in such a way or by moving the rod element 12 along the first direction illustrated by the arrow 13 through a through opening 54 of the layer structure, the through opening 54 of the layer structure corresponding through openings of the stacks 44 and thus respective through openings of the layers of the stacks 44 includes. The tabs 53 are, for example, bent or folded over in such a way that the layer structure is moved, in particular inserted, into the housing jacket 3 in the second direction illustrated by the arrow 14. Overall, it can be seen that the layer structure has a sandwich structure.

12 shows a schematic exploded view of the electrode device 10 of a fifth embodiment of the memory cell 1, the electrode device 10 according to 12 for example as the electrode device 10 in 4 shown, second variant of the fourth embodiment is used. As already in connection with 10 and 11 executed, the stack 44 can have a second or further separator layer 55, which, for example, in the layer structure along the stacking direction between the cathode layer 46, in particular between the second cathode layer (contact layer 51), of the one stack and the anode layer 47, in particular the second anode layer ( Contact layer 47) of the other stack is arranged, which is arranged along the stacking direction on the in 12 shown stack is arranged.

In 12 the base body of the second anode layer is designated 56. The cathode layer 46, the anode layer 47, the separator layer 48, the contact layer 49 (second anode layer), the contact layer 51 (second cathode layer) and the further or second separator layer 55 are also collectively referred to as layers of the stack 44. Out of 5 It can be seen that the layers each have a, in particular central, through opening 57, with the through openings 57 of the layer th of the stack 44 overlap each other along the stacking direction in the layer structure, whereby the individual through openings 57 form the through openings 54 of the layer structure as a whole.

Out of 12 It can also be seen that the tabs 52 of the second anode layer are only, that is to say only or exclusively, provided in a first circumferential region 58, the first circumferential region 58 extending in the circumferential direction of the memory cell 1 by less than 360 degrees, in particular by less than 270 degrees and in particular by less than 200 degrees, the second anode layer otherwise being free of the tabs 52. In particular, the first circumferential region 58 extends over a maximum of 180 degrees in the circumferential direction of the memory cell 1.
In 12 is also the one in 12 Base body of the second cathode layer (contact layer 51), designated 59, can be seen. It can be seen that the second cathode layer (contact layer 51) has the tabs 53 only, that is to say only or exclusively, in a second peripheral region 60. The previous and following statements regarding the second anode layer can easily be transferred to the second cathode layer and vice versa, in particular with regard to the tabs 52, 53 and the respective base body 56, 59. The second peripheral region 60 extends over less in the circumferential direction of the memory cell 1 than 360 degrees, in particular over less than 270 degrees and especially over less than 255 degrees. In particular, the second circumferential region 60 preferably extends over a maximum of 180 degrees in the circumferential direction of the memory cell 1. In addition, how from 12 can be seen, the circumferential regions 58 and 60 are arranged in the circumferential direction of the memory cell 1, in particular completely, offset from one another, and therefore, in particular completely, rotated against one another or in relation to one another. The respective, second anode layer of the respective stack 44 has the tabs 52 only in the first peripheral region 58, and the respective, second cathode layer of the respective stack 44 has the cathodic tabs 53 exclusively in the second peripheral region 60. In this way, a direct electrical connection between the cathode and the anode of the memory cell 1 can be avoided, and both the tabs 53 and the tabs 52 can be electrically contacted with the housing jacket 3, in particular with the mentioned jacket parts of the housing jacket 3.

For example, the circumferential regions 58 and 60 are designed so that an overlap is excluded, i.e. they are arranged completely offset from one another in the circumferential direction. An alternating arrangement, for example, is conceivable, so that, for example, aluminum extends from 0° to 90°, copper from 90° to 180°, aluminum again from 180° to 270°, and copper again from 270° to 360°, especially when viewed in the circumferential direction . In other words, it is preferably provided that, viewed in the circumferential direction, at least one circumferential region formed from aluminum and at least one circumferential region formed from copper are provided.

13 shows a schematic exploded view of the electrode device 10 of a sixth embodiment of the memory cell 1, the electrode device 10 according to 13 for example as the electrode device 10 in 4 shown, second variant of the fourth embodiment can be used. At the in 3 shown, sixth embodiment are, as already mentioned 11 was explained, the cathodic tabs 53 of the second cathode layer (contact layer 51) from the base body 59 towards the housing jacket 3 and are electrically contacted with the housing jacket 3. The anodic tabs 52 of the second anode layer (contact layer 49) protrude from the base body 56 towards the rod element 12 and are electrically contacted with the rod element 12. In 12 and 13 The tabs 52 and 53, also referred to as contact tabs, flags or springs, are shown in their bent or not yet bent state.
In particular with regard to the electrode winding, also known as a jelly roll, it is conceivable that at least one of the electrodes, in particular the cathode and / or the anode, have a base body and tabs arranged in one piece with the base body, which run in the circumferential direction or in the winding direction which the electrodes are in particular wound in a spiral shape and/or along which the electrode winding extends in a spiral shape, has separate and in particular successive tabs which are formed in one piece with the base body and which protrude from the base body and towards the cover 4 or the base 5 and are connected electrically the lid 4 or the base 5 are contacted, in particular connected. While, for example, the tabs 52, 53 are provided on the outer circumference or inner circumference of the respective anode layer or cathode layer, in particular in the fully manufactured state of the memory cell 1, the aforementioned tabs of the electrode winding are, for example, end-side tabs which are on one of the cover 4 or the base 5 in particular are arranged in the longitudinal direction of the storage cell 1 facing the end face of the electrode coil.

14 shows the storage in a schematic and partially sectioned perspective view cell 1, for example the electrode device 10 not being shown.

15 shows a schematic and partially sectioned perspective view of a seventh embodiment of the memory cell 1. In the seventh embodiment, the memory cell 1 has a spring device 61, in particular arranged in the receiving area 38, which in the seventh embodiment is provided, for example, on the base element 5. The spring device 61 is designed as a mechanical spring device, therefore as a mechanical spring, and comprises, for example, several mechanical spring elements 62, in the present case designed as spring arms, by means of which the layer structure is subjected to a spring force along the stacking direction and thus along the longitudinal direction of the storage cell 1 and thereby in is kept in a compressed state. The spring elements 62, also referred to as springs, are preferably bent in such a way that the electrodes cannot be damaged. If necessary, a foil can be arranged between them to keep metal debris (particles) away from the electrodes and to avoid a short circuit. The respective spring element 62 or the spring device 61 can be formed from a metallic material or from a plastic such as an elastomer and/or from polyurethane such as foam rubber.
Furthermore, it is conceivable that the spring device 61 is arranged separately from the base element 5 and, in particular along the stacking direction, between the layer structure and the base element 5 or the lid 4.

16 shows the spring device 61 with the spring elements 62 according to the seventh embodiment. The spring device 61 also has a, in particular central, through opening 63, which is arranged, for example, in an overlap with the through openings 57 and thereby forms the overall through opening 54, which is penetrated by the stacking element 12.

17 shows the spring device 61 according to an eighth embodiment, and 18 shows the spring device 61 according to a ninth embodiment. While, for example, in the seventh embodiment the spring elements 62 extend in the circumferential direction of the memory cell 1 and, for example, protrude from a base body of the spring device 61, in the ninth embodiment the spring elements 62 extend at least substantially in the radial direction of the memory cell 1 and are at least substantially stationary in the radial direction from the base body of the spring device 61. In the eighth embodiment, the spring elements 62 are designed as screws and thus as coil springs or as spirals or as spiral springs.

19 shows a tenth embodiment of the memory cell 1 in a schematic and partially sectioned perspective view. 20 shows a component 64 of the memory cell 1 according to an eleventh embodiment, wherein in 21 the electrode device 10 of the memory cell 1 according to the eleventh embodiment is shown. In particular, it is provided that the electrode device 10 according to 21 has the layer structure, which the stacks 44 according to 5 or the stacks 44 according to 13 having. As a result, in 21 the anodic tabs are designated 52 and the cathodic tabs are designated 53. In particular, it is conceivable that the respective second anode layer or the respective second cathode layer has further anodic or cathodic tabs 65, which protrude, for example, from the base body 56 or 59 towards the stacking element 12, in the circumferential direction (double arrow 7) and thus the Memory cell 1 are separated from each other, are formed in one piece with the base body 56 or 59 and, in particular directly, are electrically contacted, in particular connected, to the stacking element 12. At the in 21 In the exemplary embodiment shown, the tabs 65 are cathodic tabs, which are therefore tabs of the respective second cathode layer. In particular, the component 64 can be one of the shell parts mentioned.

22 shows the electrode device 11 according to 21 , where according to 22 the electrode device 11 is arranged in the component 64, which is designed, for example, as an insulator jacket. The presently anodic tabs 52, which protrude from the anodic base body 56 towards the component 64, are electrically contacted with the component 64, in particular while the presently cathodic tabs 53 and also the presently cathodic tabs 65 are not electrically contacted with the component 64 . For this purpose, the component 64 has a window 66 designed as a through opening, through which the cathodic tabs 53 in this case are overlapped, in particular completely, so that there is no electrical contact between the cathodic tabs 53 and the component 64. For example, the outer peripheral cathodic tabs 53 can be electrically contacted through the window 66 with another component of the memory cell 1, in particular with the housing jacket 3 or the other jacket part of the housing jacket 3, in particular while the outer peripheral anodic tabs 52 are electrically connected to the Component 64, but not electrically related to the housing jacket 3 are contacted with the other part of the jacket. It is conceivable that the component 64 is arranged in the housing jacket 3, the component 64 preferably being electrically insulated from the housing jacket 3. Then the anodic tabs 52 can be electrically contacted with the component 64 and the cathodic tabs 53 can be electrically contacted with the housing jacket 3. The presently cathodic tabs 65 can be electrically contacted, for example, with the rod element 12 and in particular via the rod element 12 with the housing jacket 3 or with the other jacket part, in particular while the presently cathodic tabs 65 are electrically insulated from the component 64 and/or from the one jacket part are. In particular, it is provided that the tabs 52, 53 and 65 are electrically contacted in such a way that the anodic tabs 52 are not electrically contacted with the cathodic tabs 53, 65. This can prevent a short circuit. For example, the window 66 extends in the circumferential direction (double arrow 7) of the memory cell 1 at least or exactly over the circumferential region 60 in which the presently cathodic tabs 53 are provided.

23 shows a schematic and partially sectioned perspective view of a twelfth embodiment of the memory cell 1. While in 23 the twelfth embodiment is shown in a perspective top view, the twelfth embodiment is in 24 shown in a schematic bottom view. Recognizable 23 are the front cathodic ones arranged on side S1 of the electrode device 10 and in 23 with 65 designated tabs, which overlap each other like bricks or fish scales and are electrically connected or contacted, for example, with the cover 4. The electrode device 10 according to the twelfth embodiment is therefore an electrode coil. Out of 24 The previously described anodic tabs, designated 67 and arranged on side S2 of the electrode winding (electrode device 10), can be seen and are electrically connected to the base 5. The bottom 5 is therefore electrically insulated from the lid 4, for example. In particular, the base 5 is electrically insulated from the housing jacket 3, which is electrically connected to the cover 4, for example. In particular, it is conceivable that in the twelfth embodiment the housing jacket 3 is formed in one piece with the cover 4. In particular, in the twelfth embodiment it is provided that the base 5 is formed in one piece with the rod element 12, so that the rod element 12 is electrically connected to the front-side anodic tabs 67. Thus, the rod element 12 and the base 5 form the electrical negative pole, while, for example, the housing jacket 3 and the cover 4 form the electrical positive pole of the memory cell 1 or are parts thereof.

25 shows a thirteenth embodiment of the memory cell 1. Here, for example, the outer circumferential cathodic tabs 53 are electrically connected to the housing jacket 3, and the anodic, inner circumferential tabs 52, as shown, for example 13 are provided, for example, are electrically connected to the stacking element 12 and in particular via this to the base 5. In particular, for example, the cathodic tabs 53 in this case can be electrically connected to the cover 4, in particular via the housing jacket 3.

26 shows a schematic representation of a method for producing the electrode coil. The stack that belongs to the in 26 Electrode coil designated 80 is wound in particular around the stacking element 12, is in 26 visible in sections and marked 68. The cathode of the stack 68 and thus of the electrode coil 80 is designated 69, and the anode is designated 70. The separator arranged between the cathode 69 and the anode 70 is designated 71. In addition, the stack 68 includes, for example, an insulator 72, which is rolled up with the anode 70, the cathode 69 and the separator 71 to form the electrode coil 80, which is illustrated by an arrow 73. The stack 68 is wound in particular in such a way that the anode 70 and the separator 71 are wrapped in the cathode 69 and the cathode 69 in the insulator 72, thus the cathode 69 on the outside of the separator 71 and on the outside of the anode 70 and the insulator 72 on the outside of the Cathode 69 runs. Thus, for example, undesirable contact between the cathode 69 and the housing jacket 3 can be avoided, since, for example, the outside cathode 69 can be insulated from at least a portion of the housing jacket 3 by means of the insulator 72.

As already explained with the layer structure, in the present case the cathode 69 can be formed by a cathode element 74 and a contacting element 75, which can be designed separately from one another and electrically connected to one another. In particular, the cathode element 74 is or forms a first cathode layer, and the contacting element 75 forms a contact layer and thus a second cathode layer. In the present case, the second cathode layer has the cathodic tabs 65 on the front side of the electrode winding 47, which protrude from the base body designated 76 and, in the present case, are arranged, for example, on the side S1 of the electrode winding 80. Accordingly, in the present case the anode 70 has, for example, an anode element 77 and a second contacting element 78. In the stack 68, the cathode element 74 and the contacting element 75 are stacked on top of one another, in particular directly. In the stack 68, for example, the anode element 77 and the second contacting element 78 are stacked on top of one another, in particular directly. The anode element 77 and the contacting element 78 are, for example, designed separately from one another and electrically connected to one another. In particular, the anode element 77 is or forms, for example, a first anode layer, and the contacting element 78 is or forms a second contact layer and thus a second anode layer, the contacting element 78 having the front-side anodic tabs 67, which are formed in one piece with the base body designated 79 and protrude from the base body 79. In the case of the electrode winding 80, the anodic tabs 67 are arranged on the side S2 of the electrode winding 80 and are electrically connected to the base element 5, for example. As explained above, the electrode winding 80 has a spiral shape along which the respective tabs 65, 67 at least partially follow one another and are separated from one another because the stack 68 is or will be wound up to form the electrode winding 80. For example, the front tabs 65, which are arranged on the side of the lid 4, are bent away from the lid 4 and in particular towards the second side S2, and, in particular directly, are electrically connected to the lid 4. Accordingly, the front anodic tabs 67 arranged on side S2 are bent away from the base 5 and, for example, towards the first side S1 and, in particular directly, are electrically connected to the base 5.

27 shows, for example, the electrode coil 80 according to 26 in a state in which the end-side, in this case cathodic, tabs 53 are not yet bent, but rather adjoin the base body 76 along the winding axis or in the longitudinal direction of the electrode winding 80.

28 shows a schematic perspective view of the electrode device 10 according to a fourteenth embodiment of the memory cell 1. In the fourteenth embodiment, for example, the electrode device 10 has the mentioned layer structure or is designed as the mentioned layer structure, so that, for example, the electrode device 10 is not designed as an electrode coil. In particular, in the fourteenth embodiment, the layer structure has the stacks 44 according to 13 on, whereby the anodic tabs are designated 52 and the cathodic tabs are designated 53. Of course, it is conceivable that the anodic tabs and the cathodic tabs can be swapped, so that the previous and following statements on the tabs 52 can be transferred to the tabs 53 and vice versa.

29 and 30 show the electrode device 10 in a fifteenth embodiment of the memory cell 1. Here, the electrode device 10 and thus its cathode, anode and separator are helical. In other words, for example, the cathode, the anode and the separator arranged between them extend helically, with the cathode having the cathodic tabs 53 here, via which the cathode is electrically connected to the housing jacket 3, for example. Furthermore, for example, the cathode is connected to the underside or to the base 5, with the anode, for example, being electrically connected to the rod element 12, in particular via the anodic tabs 52. It can also be seen that the anode is electrically connected to the cover 4.

31 shows the electrode device 10 in a sixteenth embodiment of the memory cell 1, for example the electrode device 10 according to 31 as an electrode device 10 according to 29 and 30 can be used. Particularly good looking 31 The helical or helical course of the electrode device 10, in particular its cathode 69, anode 70 and separator 71, can be seen.

32 shows a schematic perspective view of the electrode device 10 according to a seventeenth embodiment of the memory cell 1. The electrode device 10 according to the seventeenth embodiment is formed, for example, from a plurality of electrode device elements, in particular composed, with one of the electrode device elements in a schematic perspective view in 34 shown and labeled 81 there. Like, for example 32 can be seen, the electrode device elements 81 are arranged, for example, in the circumferential direction (double arrow 7) of the memory cell 1 and thus of the electrode device 10 in a star-like or star-shaped manner, with the electrode device elements 81 extending, for example, from a central region of the electrode device 10 in the radial direction of the electrode device 10 and thus the Memory cell 1 extends outwards in a star-like or star-shaped manner. In particular, the electrode device elements 81 are arranged evenly distributed in the circumferential direction of the electrode device 10 and thus of the memory cell 1. The respective electrode device element 81 comprises, for example, a stack of the cathode, anode and the separator arranged between them, which are at for example, stacked on top of one another in the circumferential direction of the electrode device 10, and therefore arranged one on top of the other. The cathode and/or the anode, as in 32 is shown in the example of the cathode, have end-side tabs 53 and / or the cathode and / or the anode can, as shown in the example of the anode, have outer circumferential tabs 52, so that in the present case, for example, the anode is connected to the housing element 3 via its anodic tabs 52 is electrically connected and so that, for example, the cathode is electrically connected to the cover 4 and / or the base 5 via its tabs 53. As already stated above, the tabs 52, 53 are bent, for example the tabs 52 according to 32 are bent in the circumferential direction of the electrode device 10, and for example the front tabs 53, which in the present case are arranged on the side S1, are bent in the direction of the side S2 and, for example, away from the cover 4. When bent, the tabs 52, 53 overlap each other like fish scales.

Finally shows 35 a detail in a schematic perspective view of the electrode device 10 according to an eighteenth embodiment of the memory cell 1, wherein the electrode device 10 according to 35 for example the electrode device 10 according to 32 is. While thus 32 shows the tabs 52 and 53 in the unbent state 35 the outer peripheral tabs 52 and the front tabs 53 are each in a bent state, in which the electrode device 10 is arranged in the cell housing 2.
It is conceivable that the cathode or the cathode layer is formed from a first metallic material, in particular aluminum. Furthermore, it is conceivable that the respective anode or the respective anode layer is formed from a second metallic material, such as copper, which is different in particular from the first metallic material.

Reference symbol list

1

Memory cell

2

Cell casing

3

Housing jacket

4

Lid

5

Floor

6

Double arrow

7

Double arrow

8th

vent hole

9

Vicinity

10

Electrode device

11

Winding axis

12

Bar element

13

Arrow

14

Arrow

15

structural unit

16

channel

17

insulator

18

insulator

19

insulator

20

insulator

21

printing plate

22

Conductor element

23

Area

24

Contact

25

Passage opening

26

insulator

27

inner circumferential surface

28

Double arrow

29

inside

30

Nut

31

Nut

32

Sealing element

33

Sealing element

34

Components

35

insulator

36

insulator

37

indentation

38

Recording area

39

indentation

40

insulator

41

Target breaking point

42

insulator

43

Target breaking point

44

stack

45

Double arrow

46

cathode layer

47

anode layer

48

Separator layer

49

Contact layer

50

Double arrow

51

Contact layer

52

tab

53

tab

54

Passage opening

55

Separator layer

56

Basic body

57

Passage opening

58

Scope

59

Basic body

60

Scope

61

Spring device

62

Spring element

63

Passage opening

64

Component

65

tab

66

Window

67

tabs

68

stack

69

cathode

70

anode

71

separator

72

insulator

73

Arrow

74

cathode element

75

Contacting element

76

Basic body

77

anode element

78

Contacting element

79

Basic body

80

Electrode wrap

81

Electrode device elements

M

Area

S1

Page

S2

Page

QUOTES INCLUDED IN THE DESCRIPTION

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

Cited patent literature

• DE 102016009910 A1 [0002]
• WO 2019043413 A1 [0002]
• DE 102008009041 A1 [0002]

Claims (13)

Method for producing a storage cell (1) for an electrical energy storage device of a motor vehicle, in which a stack (68) of two electrodes (69, 70) arranged one on top of the other and a separator (71) (11) arranged between the electrodes (69, 70) is wound onto a rod element (12), whereby an electrode coil (80) is produced from the stack (68), which is arranged in a housing element (3) of the memory cell (1), characterized in that removing the rod element (12) from the electrode winding (80), whereby the electrode winding (80) and the rod element (12) arranged therein form a structural unit (15), which is arranged in the housing element (3) and used as part of the completely manufactured memory cell (1). Procedure according to Claim 1 , characterized in that the rod element (12) has a channel (16) which is used as a temperature control channel through which a temperature control medium for temperature control of the memory cell (1) can flow. Storage cell (1) for an electrical energy storage device of a motor vehicle, with an electrode winding (80), which has two electrodes (69, 70) and a separator (71) arranged between the electrodes (69, 70), which leads to the electrode winding (80) are wound, with a rod element (12) formed separately from the electrode winding (80), which is arranged in the electrode winding (80) and is therefore surrounded by the electrode winding (80) at least in a length region, and with a cell housing (2), in in which the electrode winding (80) and at least the length region of the rod element (12) are arranged, characterized in that the cell housing (2) has a housing jacket (3) surrounding the electrode winding (80) and at least one of the electrode winding (80) in the longitudinal direction (6 ) of the electrode winding (80) on one side (S1, S2) of the electrode winding (80) covering a cover element (4, 5), the housing jacket (3), the cover element (4, 5) and the rod element (12) being integral with one another are trained. Memory cell (1). Claim 3 , characterized in that the cell housing (2) has a second cover element (5, 4) spaced from the cover element (4, 5) in the longitudinal direction (6) of the electrode winding (80), which covers the electrode winding (80) in the longitudinal direction (6 ) of the electrode winding (80) on a side (S1, S2) of the electrode winding (80) opposite the other side (S2, S1) of the electrode winding (80) in the longitudinal direction (6) of the electrode winding (80). Memory cell (1). Claim 4 , characterized in that the second cover element (5, 4) is formed separately from the rod element (12), separately from the housing jacket (3) and separately from the first cover element (4, 5) and with the rod element (12) and / or is connected to the housing casing (3). Storage cell (1) for an electrical energy storage device of a motor vehicle, with an electrode winding (80), which has two electrodes (69, 70) and a separator (71) arranged between the electrodes (69, 70), which leads to the electrode winding (80) are wound, and with a rod element (12) arranged in the electrode winding (80) and thereby surrounded at least in a length region by the electrode winding (80), which has a channel (16) through which a temperature control means can flow for temperature control of the memory cell, characterized in that in that the rod element (12) has two grooves (30, 31) spaced apart from one another in the longitudinal direction (6) of the rod element (12) on its inside (29) facing away from the electrode winding (80) and facing the channel (16), in which each a sealing element (32, 33) formed separately from the rod element (12) is arranged. Storage cell (1) for an electrical energy storage device of a motor vehicle, with a cell housing (2), and with a layer structure (10) arranged in the cell housing (2), which has a plurality of stacks (44) arranged one on top of the other, the respective stack (44 ) has layers arranged one on top of the other, namely at least one cathode layer (46, 51), at least one anode layer (47, 49) and at least one separator layer (48) arranged between the cathode layer (46, 51) and the anode layer (47, 49). Memory cell (1). Claim 7 , characterized by a rod element (12) formed separately from the layer structure (10), which is arranged in the layer structure (10) and is therefore surrounded by the layer structure (10) at least in a length region of the rod element (12). Memory cell (1) according to one of the Claims 7 or 8th , characterized in that the anode layer (47, 49) and/or the cathode layer (46, 51) has a base body (56, 59) and is formed in one piece with the base body (56, 59), in the circumferential direction (7) of the memory cell (1 ) separate from each other and in the circumferential direction (7) of the Spei cher cell (1) has successive tabs (52, 53). Memory cell (1) according to the Claims 8 and 9 , characterized in that at least some of the tabs (52, 53) protrude from the base body (56, 59) towards the rod element (12), are bent relative to the base body (56, 59) and are electrically connected to the rod element (12). are contacted. Memory cell (1). Claim 9 or 10 , characterized in that at least some of the tabs (52, 53) from the base body (56, 59) towards a housing jacket (3) of the cell housing (2) surrounding the layer structure (10) in the circumferential direction (7) of the memory cell (1). protrude, are bent relative to the base body (56, 59) and are electrically contacted with the housing jacket (3). Memory cell (1) according to one of the Claims 7 until 11 , characterized by a spring device (61), by means of which the layer structure (10) is subjected to a spring force along a stacking direction (45), along which the stacks (44) of the layer structure (10) are arranged one on top of the other, and thereby kept in a compressed state is. Motor vehicle, with an electrical energy storage device which has electrically interconnected storage cells (1) according to one of the preceding claims.

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