DE102022118635A1 - Electrical energy storage for a motor vehicle and motor vehicle - Google Patents

Abstract

The invention relates to an electrical energy storage device (1) for storing electrical energy for a motor vehicle, with a plurality of storage cells (2) designed to store the electrical energy, each of which has a cell housing (4) delimiting a receiving space (5) and a temperature control means have a line element (7) that can be flowed through and penetrates the receiving space (5), and with a contacting device (9) which is designed separately from the storage cells (2), via which the storage cells (2) are electrically connected to one another, the contacting device (9) being controlled by the Domes (10, 11) through which temperature control fluid can flow and which are inserted into the line elements (7), via which the temperature control medium can be introduced into the line elements (7) and/or removed from the line elements (7). The memory cells (2) are held on a cell holder (12) which is designed separately from the memory cells (2) and separately from the contacting device (9) and which at least limits relative movements between the memory cells (2), by means of which the domes (10, 11) held in the line elements (7).

Description

The invention relates to an electrical energy storage device for a motor vehicle according to the preamble of patent claim 1 or 16. The invention further relates to a motor vehicle with at least one such energy storage device.

The US 2019/0393571 A1 A battery system for an electric vehicle can be seen as known. Furthermore, the reveals DE 102 02 807 A1 a device for controlling the temperature of high performance secondary batteries for automotive applications. Furthermore, from the DE 10 2018 213 637 A1 a cooling lance for cooling an electrically conductive contact body is known.

The object of the present invention is to create an electrical energy storage device for a motor vehicle and a motor vehicle with such an electrical energy storage device, so that a particularly advantageous temperature control can be implemented in a particularly space-saving and cost-effective manner.

This object is achieved according to the invention by an electrical energy storage device with the features of patent claim 1, by a motor vehicle with the features of patent claim 15 and by an electrical energy storage device with the features of patent claim 16. Advantageous embodiments of the invention are the subject of the dependent claims.

A first aspect of the invention relates to an electrical energy storage device, also referred to simply as a storage device, for storing, in particular electrochemically, electrical energy or electric current for a motor vehicle. Preferably, the electrical energy storage is designed as a battery, in particular as a secondary battery, so that the electrical energy can be stored or stored electrochemically by means of the energy storage. The motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, has the electrical energy storage in its completely manufactured state. Preferably, the electrical energy storage is designed as 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. This makes it possible, for example, to realize particularly large electrical powers for, in particular, purely electrical driving of the motor vehicle. The motor vehicle is preferably designed as a hybrid or electric vehicle, in particular as a battery-electric vehicle (BEV). Thus, in its fully manufactured state, the motor vehicle has, for example, at least one electric 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 hundred volts.

The energy storage has several storage cells in or by means of which the electrical energy, in particular electrochemically, is to be stored or stored. The memory cells are also referred to as cells and are individual cells, i.e. components designed separately from one another. In particular, the respective storage cell is a battery cell, therefore a secondary cell. Expressed again in other words, it is preferably provided that the respective memory cell is designed as an accumulator or as an accumulator cell. For example, the respective memory cell has two end faces spaced apart from one another, in particular along a spacing direction, which are also referred to as end faces or are formed by end faces. In particular, the spacing direction coincides with a longitudinal extension direction of the respective memory cell, which extends, for example, at least substantially elongated along its respective longitudinal extension direction and thus has an elongated extension, therefore a longitudinal extension, along the respective longitudinal extension direction.

The respective memory cell has a respective cell housing, which delimits, in particular directly, a respective receiving space of the respective memory cell. In particular, the receiving space is partially and, for example, directly limited by the end faces. For example, the respective cell housing has a respective cell jacket, also referred to as a housing jacket, which is arranged at least along the spacing direction between the end faces and partially, in particular directly, delimits the receiving space. The memory cell could in principle be designed as a round cell, so that the respective memory cell can, for example, be cylindrical on the outer circumference, and therefore have the shape of a particularly straight circular cylinder. However, the previous and following statements can also be easily transferred to memory cells which have a shape different from a cylindrical shape on the outer circumference and are, for example, prismatic or have a different shape. In particular, a respective storage device of the respective storage cell is accommodated in the receiving space. The electrical energy can be stored, in particular electrochemically, by means of the respective storage device. For example, the respective storage device comprises at least one electrode. In particular, the respective storage device can have at least or exactly two electrodes. In particular, a first of the electrodes has a first electrical polarity, a second of the electrodes having a second electrical polarity, the second electrical polarity being an electrical polarity different from the first electrical polarity, in particular wherein the electrical polarities are opposite to one another. Thus, for example, one of the electrodes is a cathode, whereby the other electrode can be an anode. Alternatively or additionally, the respective storage device can have a respective, in particular liquid, electrolyte, wherein the respective electrode can be in, in particular direct, contact with the electrolyte.

The respective storage cell also has a respective line element which penetrates the receiving space and, for example, also the end faces or end faces. A liquid temperature control medium, for example, can flow through the line element, by means of which, for example, the respective storage cell can be tempered, that is, cooled and/or heated. Since the line element penetrates the receiving space and, for example, also the end faces or the end faces, it is conceivable that the line element itself, that is, viewed on its own, opens into a respective environment of the respective storage cell at both ends, that is to say at the respective two ends. Thus, for example, the temperature control medium can be introduced into the line element from outside the storage cell and then flow through the line element, in particular at a first of the ends. At the second end, for example, the temperature control agent can be removed from the line element and, for example, led to the surroundings of the memory cell. The respective memory cell has, for example, two connection elements, also referred to as terminals, which are also referred to as electrode connections. The electrode connections are, for example, respective contact areas. The respective memory cell can provide the electrical energy stored in the respective memory cell via the electrode connections, that is to say via the contact areas. In addition, the respective memory cell can be supplied with electrical energy via its electrode connections, i.e. via its contact areas, which can thus be stored in the respective memory cell. For example, the contact areas are arranged on the same end face, i.e. on a first of the end faces or on the second end face. The end faces face away from each other along the spacing direction. One of the electrode connections, therefore one of the contact areas, is, for example, an electrical plus pole of the respective memory cell and is therefore also referred to as a cathode. The other electrode connection, therefore the other contact area, is, for example, a respective negative pole of the respective memory cell and is therefore also referred to as an anode. This means that one electrode connection can be the electrical plus pole and the other electrode connection can be the electrical minus pole of the respective memory cell. The line element is, for example, formed separately from at least one of the end faces or separately from both end faces and is connected to the at least one end face, in particular the two end faces.

Furthermore, the electrical energy storage has a contacting device which is designed separately from the storage cells and separately from the line elements, via which the storage cells are electrically connected to one another. As a result, the memory cells are connected in series or parallel to one another, for example. In particular, the contacting device can be electrically contacted with the respective connection elements of the respective memory cell, whereby the memory cells can be electrically connected to one another, in particular in such a way that the memory cells are connected in parallel to one another, that is to say in a parallel connection, or in series, that is to say in a series connection are electrically connected to each other. The contacting device is also referred to as a contacting system or contact system.

In order to be able to realize a particularly advantageous temperature control, that is to say cooling and/or heating, of the memory cells in a particularly space-saving and cost-effective manner, it is provided according to the invention that the contacting device has domes through which the temperature control fluid can flow and which are inserted into the line elements the preferably liquid temperature control agent can be introduced into the line elements and/or removed from the line elements. The contacting device therefore has at least a dual function. On the one hand, the contacting device is used to electrically connect the memory cells to one another via or by means of the contacting device. On the other hand, the contacting device is also used to guide the temperature control agent, which is preferably designed as a fluid, that is to say to conduct and thereby introduce it into the line elements and / or lead it away from the line elements, that is to say to lead it out of the line elements. The contacting device is therefore also used to supply the line elements with the temperature control agent via the domes and/or to divert the temperature control agent from or out of the line elements via the domes. Preferably, the contacting device is formed from an electrically conductive material, in particular from an electrically conductive, metallic material, so that the memory cells can be electrically connected to one another via the contacting device. In this regard, it has proven to be particularly advantageous if an electrically non-conductive temperature control agent is used as the temperature control agent, so that the temperature control agent is preferably designed as a non-conductor. A non-conductor is to be understood in particular as a substance whose electrical conductivity is less than 10 ^-8 S*cm ^-1 or has a specific resistance of over 10 ⁸ Ω*cm. This allows unwanted short circuits to be avoided.

The respective dome is a respective, in particular elongated, projection through which the temperature control medium can flow. Thus, for example, the temperature control medium flowing through the respective dome can flow from the dome into the line element, and can therefore flow out of the respective dome and flow into the line element. Furthermore, it is conceivable that the temperature control medium flowing through the respective line element can flow out of the line element and flow into the respective dome and can subsequently be removed from the line element by means of the respective dome. For example, first of the domes penetrate the respective, first end faces of the memory cells, and for example, second of the domes penetrate the respective, second end faces of the respective memory cells.

According to the invention, the electrical energy storage also has a cell holder which is designed separately from the storage cells and separately from the contacting device, which is also simply referred to as a holder. The memory cells are held, in particular directly, on the cell holder, whereby relative movements between the memory cells are at least limited, in particular connected. In other words, it is provided that the cell holder at least limits, in particular prevents, relative movements between the memory cells. In particular, the memory cells are held together or held together via the cell holder. This is to be understood in particular as meaning that the memory cells are held relative to one another by means of the cell holder in a pattern predetermined by the cell holder. In addition, it is particularly preferably provided that the memory cells, in particular in pairs, are held at a respective distance from one another by means of the cell holder, so that it is preferably provided that the memory cells do not touch each other. For example, the contacting device is held, in particular directly, on the cell holder. By means of the cell holder, the domes are held in the line elements, in particular relative to the storage cells, and are therefore secured. In other words, it is further provided that the cell holder at least limits, in particular prevents, relative movements between the domes and the line elements. The cell holder therefore also has a dual function. On the one hand, the cell holder is used to hold the memory cells together, that is to say to at least limit, in particular to prevent, relative movements between the memory cells. On the other hand, the cell holder is used to secure the domes in the line elements, and therefore to at least limit, in particular to prevent, relative movements between the domes and the storage cells or the line elements. Since the contacting device, the cell holder and the storage cells are designed separately from one another, the electrical energy storage can be manufactured particularly easily and therefore in a timely and cost-effective manner. For this purpose, for example, the domes are inserted into the line elements and the storage cells are held on the cell holder, which in particular means that the cell holder also secures the domes in the line elements. This makes it possible to create a particularly simple and compact structure for the electrical energy storage device that can be produced in a timely and cost-effective manner. By using the line elements, the storage cells can be cooled particularly effectively and efficiently, in particular according to the type or principle of inversion cooling, but without actually implementing such inversion cooling and thus having to accept the disadvantages of such inversion cooling. The term inversion cooling means that during operation of the electrical energy storage device, the liquid and preferably electrically non-conductive temperature control medium, for example, flows directly onto and around the storage cells. This can ensure an advantageous heat exchange between the temperature control medium and the storage cells. However, disadvantages of such inversion cooling can be undesirable leaks and undesirable corrosion effects, which can now be avoided by directing the temperature control medium in a targeted manner using the line elements. A particularly advantageous heat can be used via the line element exchange between the temperature control medium and the respective storage cell can be guaranteed. For example, if the temperature control medium has a higher temperature than the respective storage cell while it flows through the line element, heat can be transferred from the temperature control medium to the respective storage cell via the respective line element, whereby the respective storage cell can be heated and/or kept warm . For example, if the temperature control medium has a lower temperature than the respective storage cell while it flows through the respective line element, then heat can be transferred from the respective storage cell to the temperature control medium via the respective line element, whereby the respective storage cell is cooled. In particular, it is conceivable that the line element penetrates or passes through the respective storage device, whereby a particularly effective and efficient temperature control of the respective storage cell can be guaranteed. Undesirable leaks and corrosion effects can be advantageously avoided with the electrical energy storage device according to the invention. The electrical energy storage device, for example designed as a high-voltage battery (HV battery), can be designed to be significantly more compact and slimmer compared to conventional solutions. In addition, the use of materials for producing the electrical energy storage can be kept low. The number of parts, the costs and the installation space requirements of the electrical energy storage can be kept to a particularly small extent. The contacting device enables space-saving contacting of the memory cells as well as effective and efficient cooling of the memory cells. Separate, additional recordings for contacting components can be avoided. Since the cell holder, also referred to as a carrier or designed as a carrier, and the contacting device are designed separately from one another, the cell holder can also be designed in a simple and therefore cost-effective manner. For example, the cell holder is made of a plastic. For example, the cell holder is manufactured by injection molding, in particular by plastic injection molding.

In order to be able to produce the electrical energy storage particularly easily and therefore in a timely and cost-effective manner, as well as to be able to provide particularly effective and efficient temperature control, i.e. cooling and/or heating, of the storage cells, it is provided in one embodiment of the invention that the first of the domes is of Feed domes inserted into the line elements are formed on a first side, via which the temperature control medium can be introduced into the line elements. For example, the respective first end face of the respective storage cell is arranged on the first side, so that the respective feed dome, for example, penetrates the respective first end face or end face. Second of the domes are designed as discharge domes, via which the temperature control medium can be removed from the line elements, that is to say can be led out of the line elements, the second domes being inserted into the line elements from a second side. The respective second side lies opposite the first side, in particular along the spacing direction or along the longitudinal extension direction. Thus, for example, the respective, second end face is arranged on the respective, second side, so that, for example, the respective, second dome (removal dome) penetrates the respective, second end face or end face.

It has proven to be particularly advantageous if the contacting device has a supply line element that is common to the supply domes and through which the temperature control medium can flow, via which the supply domes can be supplied with the temperature control medium. The respective feed dome is preferably designed as a solid body and is inherently rigid. The supply line element is preferably designed as a solid body and is preferably inherently rigid. It is conceivable that the supply domes and the supply line element are formed in one piece with one another, so that, for example, the supply domes and the supply line element are formed from a single piece, and are therefore designed as a monoblock or are formed by a monoblock. Furthermore, it is conceivable that the supply domes are designed separately from one another, and that the respective supply dome and the supply line element are designed separately from one another, so that the supply domes, which are designed separately from one another and separately from the supply line element, are connected to the supply line element and are mechanically connected to one another via the supply line element. In particular, it is conceivable that the supply domes and the supply line element are formed from the same, electrically conductive and, for example, metallic material, it being conceivable that the supply domes are electrically conductively connected to the supply line element and thus electrically conductively connected to one another via the supply line element. The feed domes and the line elements via the feed domes can thus be supplied with the temperature control agent in a simple, cost-effective and space-saving manner.

A further embodiment is characterized in that the contacting device has a discharge line element which is common to the discharge domes and through which the temperature control medium can flow, into which the temperature control medium can be introduced from the discharge domes, so that via the discharge Line element the temperature control agent can be removed from the discharge domes. The previous and following statements regarding the supply line element and the supply domes can easily be transferred to the discharge line element and the discharge domes and vice versa. It is therefore conceivable that the discharge domes and the discharge line element are formed in one piece with one another, and are therefore formed from a single piece, so that, for example, the discharge domes and the discharge line element are designed as a monoblock or are formed by a monoblock. In other words, it is preferably provided that the discharge domes and the discharge line element are not designed and assembled as separately formed and interconnected components, but rather the discharge domes and the supply line element are preferably formed in one piece with one another. Preferably, the respective discharge dome is a solid body and preferably inherently rigid. Furthermore, it is preferably provided that the supply line element is a solid body and in particular is inherently rigid. Furthermore, it is conceivable that the discharge domes are designed separately from one another and separately from the discharge line element, with the respective discharge dome being connected to the discharge line element, so that the discharge domes are connected to one another via the discharge line element. In particular, it is conceivable that the discharge domes and the discharge line element are formed from the same, electrically conductive and in particular metallic material. In particular, it is conceivable that the respective discharge dome is electrically conductively connected to the discharge line element, so that, for example, the discharge domes are electrically conductively connected to the supply line element and thus electrically conductively connected to one another via the supply line element. By means of the discharge domes and the discharge line element, the temperature control agent can be removed from the line elements in a space-saving and cost-effective manner, so that a compact and cost-effective design of the electrical energy storage can be achieved.

For example, the feed domes and the feed line element form a first structural unit or the feed domes and the feed line element are formed by a first structural unit. For example, the discharge domes and the discharge line element form a second structural unit or the discharge domes and the discharge line element are formed by a second structural unit. For example, the structural units are designed separately from one another. For example, the first structural unit is arranged on the first side, in particular in such a way that the feed domes are inserted into the line elements from the first side. For example, the second structural unit is arranged on the second side, in particular in such a way that the discharge domes are inserted into the line elements from the second side. This makes it possible to create a simple, time- and cost-effective construction of the electrical energy storage device.

In order to be able to produce the electrical energy storage in a particularly timely and cost-effective manner, it is provided in a further embodiment of the invention that the cell holder has a first holder part arranged on the first side, by means of which the supply domes are held in the line elements and thus secured. Furthermore, the cell holder preferably has a second holder part arranged on the second side, by means of which the discharge domes are held in the line elements. The holder parts are designed separately from one another and connected to one another. In particular, the holder parts are, for example, locked together, that is, connected to one another in a form-fitting manner. In particular, it is conceivable that the holder parts are connected to one another in a non-destructively detachable manner, in particular locked.

In order to be able to keep the number of parts and thus the costs and the installation space requirement of the electrical energy storage device to a particularly small extent, it is provided in a further embodiment of the invention that the respective holder part is designed in one piece, i.e. is formed from a single piece. The respective holder part is therefore preferably designed as a monoblock or is formed by a monoblock. In particular, the respective holder part can be made of a plastic. For example, the respective holder part is produced by injection molding, in particular by plastic injection molding.

In order to be able to produce the electrical energy storage particularly cost-effectively, it is provided in a further embodiment of the invention that the first holder part has a first cover element arranged on the first side, from which one from the first side and from the first cover element to the second The first column parts of the first holder part protrude towards the side in the first direction. The second holder part has a second cover element arranged on the second side, from which second column parts of the second holder part protrude in a second direction pointing from the second side and from the second cover element towards the first side and opposite to the first direction. For example, when viewed in the second direction, the memory cells are at least partially overlapped and thus covered by the first cover element. For example, when viewed in the first direction, the memory cells are at least partially overlapped, and therefore covered, by the second cover element.

A respective one of the first column parts and a respective one of the second column parts form a respective pair of column parts, the respective second column part of which adjoins the respective first column part of the respective pair of column parts in the first direction. The respective column parts of the respective pair of column parts are connected to one another, in particular locked together. For example, the respective column parts of the respective pair of column parts are connected to one another in a non-destructively detachable manner, in particular locked together. As a result, the holder parts, which are preferably designed separately from one another, are simply and firmly connected to one another, in particular along the spacing direction. This allows the holder parts to hold the domes securely and firmly in the line elements, so that, for example, the domes cannot be pushed out of the line elements by appropriate pressure from the temperature control medium.

In order to be able to electrically contact the memory cells using the contacting device in a simple and space-saving manner, it is provided in a further embodiment of the invention that at least some of the domes form a dome group, and are therefore components or members of a dome group. The domes of the dome group, that is, the domes forming the dome group, are mechanically connected to one another by a connecting element of the contacting device, which is preferably designed as a solid body and is very preferably inherently rigid. For example, the domes of the dome group are formed in one piece with the connecting element and thus in one piece with each other, so that, for example, the domes of the dome group and the connecting element are formed from a single piece. Furthermore, it is conceivable that the domes of the dome group are designed separately from one another and separately from the connecting element and are mechanically connected to the connecting element, so that the domes of the dome group are mechanically connected to one another via the connecting element. In particular, it is conceivable, especially when the domes of the dome group are the supply domes, that the connecting element is or forms the supply line element. In particular, if the domes of the dome group are the discharge domes, for example the connecting element is the discharge line element or the connecting element forms the discharge line element.

The connecting element has a channel that is common to the domes of the dome group and through which the temperature control medium can flow, via which the temperature control medium can be fed to the domes of the dome group or can be removed from the domes of the dome group.

It has proven to be particularly advantageous if contacting fingers protrude from the connecting element, in particular in addition to the domes of the dome group. For example, the contacting fingers are formed in one piece with the connecting element, so that, for example, the connecting element and the contacting fingers are formed from a single piece, therefore formed by a monoblock or designed as a monoblock. For example, the domes of the dome group protrude from the connecting element in a first distance direction. For example, the contacting fingers, also simply referred to as fingers, arms or arms, protrude from the connecting element in a second distance direction, for example the second distance direction running obliquely or preferably perpendicular to the first distance direction. In the fully manufactured state of the electrical energy storage, for example, the first distance direction is the first direction, in particular when the domes of the dome group are the supply domes. Furthermore, it is conceivable that the first distance direction is the second direction, especially if the domes of the dome group are the discharge domes. In particular, for example, the contacting fingers and the connecting element are formed from the same or the same electrically conductive, in particular metallic, material, with the contacting fingers preferably being connected to the connecting element in an electrically conductive manner. Furthermore, it is preferably provided that the domes of the dome group and the connecting element are formed from the same, electrically conductive, in particular metallic, material, wherein preferably the domes of the dome group are electrically conductively connected to the connecting element, so that preferably the domes of the dome group via the Connecting element are connected to each other in an electrically conductive manner.

The previously mentioned electrode connections of the respective memory cell, also referred to as contact areas, are also referred to as electrical connection elements, since the memory cells are electrically connected to one another via their electrical connection elements. It is provided that in each case, in particular precisely, one of the contacting fingers is electrically contacted with each, in particular precisely, one of the electrical connection elements, i.e. the contact areas, of the respective memory cell, so that the memory cells via their electrical connection elements and the contacting fingers and in particular the connecting element are electrically connected to each other.

For example, it is conceivable that the domes of the dome group, the connecting element and the contacting fingers form the first structural unit or the second structural unit, and are therefore formed by the first structural unit or by the second structural unit. This makes it possible to create a particularly simple and space-saving electrical connection for the memory cells.

In order to be able to implement a particularly simple and cost-effective structure of the electrical energy storage, it is provided in a further embodiment of the invention that the respective contacting finger is electrically contacted between the respective contacting finger and the other connection element of the respective storage cell, with the respective one connection element of the respective contacting finger , for example, an electrical insulating element is arranged which directly touches the respective contacting finger on the one hand and the respective, further connection element on the other hand, by means of which the respective contacting finger is electrically insulated from the respective, further connection element. The electrical insulation element is therefore an insulator, i.e. a non-conductor, whose electrical conductivity is preferably less than 10 ^-8 S * cm ^-1 . The electrical insulation element can be, for example, a layer that is applied, for example, to the respective contacting finger. For example, the layer is formed by a film, in particular made of a plastic, or the layer is formed by a coating such as a lacquer. Alternatively or additionally, it is conceivable that the respective contacting finger has a respective recess, for example formed by an indentation, through which the respective contacting finger is electrically spaced from the respective, further connection element, so that electrical contacting of the respective contacting finger with the respective, further connection element is avoided. In this way, undesirable electrical contacting of the respective contacting finger with the respective, further connection element can be avoided in a particularly simple and cost-effective manner, whereby undesirable short circuits can be avoided in a particularly simple and cost-effective manner.

In order to be able to provide a particularly effective and efficient temperature control of the memory cells in a particularly simple, cost-effective and space-saving manner, it is provided in a further embodiment of the invention that the respective dome is against the respective line element into which the respective dome is inserted by means of a respective sealing element formed separately from the respective line element and separately from the respective dome. For example, the respective sealing element is made of rubber. For example, the sealing element is a sealing ring, in particular an O-ring. This means that undesirable leaks can be avoided easily, in a space-saving and cost-effective manner. Furthermore, the sealing element can be a sleeve, in particular made of rubber, which is arranged, in particular inserted, between the respective dome and the respective storage cell, for example, the sleeve having, for example, a collar or collar as a stop, via which the sleeve, for example, at least indirectly , in particular directly, is supported on the respective memory cells. For example, the sleeve is penetrated by the respective dome, so that, for example, the respective dome is inserted into the respective sleeve and/or pushed through the respective sleeve.

A further embodiment is characterized in that at least the first of the sealing elements are arranged in corresponding indentations in the respective cell housings. As a result, undesirable relative movements between the first sealing elements and the cell housings can be avoided in a space-saving manner, so that undesirable leaks can be avoided. This allows effective and efficient temperature control to be achieved. For example, if necessary and therefore purely by way of example or optionally, the respective sealing element, also referred to simply as a seal, can be designed to be L-shaped, that is to say as an L-shaped seal.

In order to be able to realize a particularly effective and efficient temperature control in a particularly space-saving and cost-effective manner, it is provided in a further embodiment of the invention that through the respective indentation at least one respective component, which is designed separately from the respective cell housing and is arranged in the respective receiving space respective memory cell is fixed to the respective cell housing. In other words, the indentation is preferably used to at least limit, in particular to prevent, relative movements between the respective component and the respective cell housing. The indentation therefore preferably also has a dual function. On the one hand, the indentation is used to at least limit, and in particular prevent, undesirable relative movements between the component and the respective cell housing. On the other hand, the indentation is used to fix the respective first sealing element relative to the housing. In this way, a particularly cost-effective and space-saving construction of the electrical energy storage can be achieved.

For example, the respective indentation is produced by crimping.

Finally, it has proven to be particularly advantageous if the respective component has a respective contact element and/or a respective electrical heating element, in particular a PTC element. This embodiment is based on the knowledge that a fixing process, by means of which relative movements between the already provided component and the respective cell housing are at least limited, in particular prevented, is used to also fix the respective first sealing element on the respective cell housing. As a result, the electrical energy storage can be manufactured particularly cost-effectively.

A second aspect of the invention relates to a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, with at least one electrical energy storage device according to the first aspect of the invention. 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.

A third aspect of the invention relates to an electrical energy storage device for storing electrical energy for a motor vehicle, with a plurality of storage cells designed to store the electrical energy, each of which has a cell housing delimiting a receiving space and a line element through which a temperature control medium can flow and penetrating the receiving space, and with a contacting device designed separately from the memory cells, via which the memory cells are electrically connected to one another.

In order to be able to realize a particularly advantageous temperature control, that is to say cooling and/or heating, of the memory cells in a particularly space-saving and cost-effective manner, it is provided according to the invention that the respective line element has a respective one through which the temperature control medium can flow and into one of the temperature control medium flow-through channel system of the contacting device have an inserted dome, wherein the temperature control medium can be introduced from the channel system of the contacting device into the line elements and / or can be removed from the line elements and introduced into the channel system of the contacting device via the domes. The memory cells are held on a cell holder which is designed separately from the memory cells and separately from the contacting device and which at least limits relative movements between the memory cells, by means of which the domes are held in the line elements. Advantages and advantageous embodiments of the first and second aspects of the invention are to be viewed as advantages and advantageous embodiments of the third aspect of the invention and vice versa. The third aspect is, so to speak, the kinematic reversal of the first aspect of the invention, since in the first aspect of the invention the domes of the contacting device are inserted into the line elements, and since in the third aspect of the invention the domes of the line elements are inserted into the contacting device, whose channel system can be flowed through by the temperature control agent. The contacting device, in the interior of which the channel system is arranged or runs, can therefore be flowed through by the temperature control medium.

• 1 eine schematische Explosionsansicht eines elektrischen Energiespeichers für ein Kraftfahrzeug;
• 2 eine schematische Perspektivansicht von zwei Baueinheiten des elektrischen Energiespeichers;
• 3 eine schematische Perspektivansicht einer der Baueinheiten;
• 4 eine schematische Perspektivansicht eines elektrischen Isolationselements des elektrischen Energiespeichers;
• 5 eine weitere schematische Perspektivansicht der Baueinheit gemäß 3;
• 6 eine schematische Perspektivansicht eines Ausgangswerkstücks, aus welchem die Baueinheit gemäß 5 hergestellt werden kann;
• 7 eine schematische Schnittansicht des elektrischen Energiespeichers;
• 8 eine weitere schematische Schnittansicht des elektrischen Energiespeichers;
• 9 eine schematische Perspektivansicht von Speicherzellen des elektrischen Energiespeichers;
• 10 eine weitere schematische Schnittansicht des elektrischen Energiespeichers; und
• 11 ausschnittsweise eine schematische Draufsicht des elektrischen Energiespeichers.

Further details of the invention emerge from the following description of a preferred exemplary embodiment and from the drawing. This shows:

• 1 a schematic exploded view of an electrical energy storage device for a motor vehicle;
• 2 a schematic perspective view of two structural units of the electrical energy storage;
• 3 a schematic perspective view of one of the structural units;
• 4 a schematic perspective view of an electrical insulation element of the electrical energy storage;
• 5 a further schematic perspective view of the structural unit according to 3 ;
• 6 a schematic perspective view of a starting workpiece from which the structural unit according to 5 can be produced;
• 7 a schematic sectional view of the electrical energy storage;
• 8th a further schematic sectional view of the electrical energy storage;
• 9 a schematic perspective view of storage cells of the electrical energy storage;
• 10 a further schematic sectional view of the electrical energy storage; and
• 11 a section of a schematic top view of the electrical energy storage.

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

1 shows a schematic exploded view of an electrical energy storage device 1 for a motor vehicle. This means that the motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, has, in its fully manufactured state, the electrical energy storage 1, which is also simply referred to as a storage device. As will be explained in more detail below, electrical energy or electrical current, in particular electrochemically, can be stored in the energy storage 1 or by means of the energy storage 1, so that the electrical energy storage 1 is preferably a battery, in particular a secondary battery. In particular, the energy storage 1 is a high-voltage battery, that is, a high-voltage storage (HV storage) 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 several hundred Volts is. The energy storage 1 has a plurality of storage cells 2, which in the exemplary embodiment shown in the figures are designed as round cells and are therefore cylindrical on the outer circumference. The electrical energy can be stored, in particular electrochemically, in or by means of the memory cells 2, so that the respective memory cell 2 is preferably designed as a secondary cell. It can be seen that the memory cells 2 are components designed separately from one another and are therefore individual cells.

The respective memory cell 2 has a respective, in 1 longitudinal extension direction illustrated by a double arrow 3 and thus a longitudinal extension running along the longitudinal extension direction. The respective memory cell 2 has a respective, first end face S1 and a respective, second end face S2, with the end faces S1 and S2 of the respective memory cell 2 facing away from one another in the longitudinal direction of the respective memory cell 2 and at respective, in particular free, ends of the respective ones Memory cell 2 are arranged. The respective memory cell 2 has two connections, also referred to as electrode connections, electrical connection elements or terminals, which are also referred to as connection areas or contacting areas or are designed as connection areas or contacting areas. As will be explained in more detail below, the memory cells 2 are electrically connected to one another via their electrode connections, i.e. via their contact areas, and are connected to one another in series or parallel, for example. In particular, it is conceivable that the respective contact areas of the respective memory cell 2 can be arranged on the respective, same end face S1 and/or S2.

How particularly good in combination with 7 can be seen, the respective memory cell 2 has a respective cell housing 4 and a respective receiving space 5, which, in particular directly, is formed or limited by the respective cell housing 4. For example, a respective storage device 6 of the respective storage cell 2 is arranged in the respective receiving space 5, wherein the electrical energy can be stored by means of the respective storage device 6. The respective storage cell 2 also has a respective line element 7, through which a preferably liquid temperature control medium can flow, such as in 7 is illustrated by arrows. The end faces S1 and S2 are, for example, end faces or formed by end faces. It is conceivable that the line element 7 can be formed separately from at least one of the end faces S1 and S2 and can be connected to the at least one end face S1, S2. Further is over 7 It can be seen that the respective line element 7 has or, in particular directly, delimits a respective channel 8 through which the temperature control medium can flow. The respective line element 7 and thus the respective channel 8, which is also referred to as a temperature control channel, penetrate or pass through the respective receiving space 5 of the respective memory cell 2 and thus, for example, the respective storage device 6 of the respective memory cell 2.

Out of 1 It can be seen that the energy storage 1 also has a contacting device 9 which is designed separately from the storage cells 2 and via which the storage cells 2 are electrically connected to one another. For this purpose, the contacting device 9 is electrically contacted, in particular directly, with the respective contact areas of the respective memory cell 2, so that the memory cells 2 are electrically connected to one another via their respective contact areas and via the contacting device 9. In particular, the contacting device 9 is formed from an electrically conductive, metallic material.

A first of the respective contact areas is or forms, for example, a first electrical pole of the respective memory cell 2. The second contact area of the respective memory cell 2 forms or is, for example, a second electrical pole of the respective memory cell 2, the first electrical pole having a first electrical polarity and the second electrical pole has a second electrical polarity that is different from the first polarity and in particular opposite to the first electrical polarity. Thus, for example, the first electrical pole is an electrical positive pole, so that, for example, the respective first contact area is also referred to as a cathode connection or cathode net will. For example, the second electrical pole is an electrical negative pole, so that the second contact area is also referred to as an anode connection or anode, for example. In 9 and 11 the respective cathode is designated by a plus sign, and the respective anode is designated by a minus sign.

In order to be able to realize a particularly space-saving and cost-effective design of the electrical energy storage device 1 as well as a particularly advantageous temperature control, that is to say cooling and/or heating of the storage cells 2, this is shown particularly well 1 until 7 can be seen, the contacting device 9 has domes 10 and 11 through which the temperature control fluid can flow and which are inserted into the line elements 7, via which the temperature control medium can be introduced into the line elements 7 and removed from the line elements 7, that is to say can be diverted out of the line elements 7. Furthermore, the electrical energy storage 1 has a cell holder 12 which is designed separately from the storage cells 2 and separately from the contacting device 9 and is also simply referred to as a holder, which in the exemplary embodiment shown in the figures has at least or exactly two holder parts 13 and 14. The holder part 13 and/or the holder part 14 are preferably formed in one piece, and are therefore formed from a single piece. For example, the holder part 13 and/or the holder part 14 are made of a plastic. For example, the holder part 13 and/or the holder part 14 is produced by injection molding, in particular by plastic injection molding. In principle, it is conceivable that the holder parts 13 and 14 are identical, that is, of identical construction, whereby, for example, the holder parts 13 and 14 can be produced using the same or using the same tool, in particular using the same or using the same injection molding tool. As a result, the cell holder 12 can be manufactured particularly cost-effectively. Out of 1 It can be seen that the holder parts 13 and 14 are components that are designed separately from one another and are connected to one another, in particular in a non-destructively detachable manner. In the exemplary embodiment shown in the figures, the holder parts 13 and 14 are locked together in the completely manufactured state of the energy storage device 1 and are thus clipped together, that is to say connected to one another in a form-fitting manner. The memory cells 2 are supported, in particular directly, on the cell holder 12 and held on the cell holder 12, whereby relative movements between the memory cells 2 among themselves and relative movements between the respective memory cell 2 and the cell holder 12 are at least limited, preferably prevented. In addition, the memory cells 2 are kept at a respective distance from one another by means of the cell holder 12, and the memory cells 2 are particularly well-shaped by means of the cell holder 12 1 recognizable patterns kept relative to each other. For example, first of the memory cells 2 are arranged in a first cell row R1, while second of the memory cells 2 are arranged in a second cell row R2. This is to be understood in particular as meaning that the first memory cells 2 are arranged one after the other along a first straight line, whereby the first memory cells 2 form the first cell row R1, and the second memory cells 2 are arranged one after the other along a second straight line, whereby the second memory cells 2 form the second Form cell row R2. The first straight line and the second straight line preferably run parallel to one another, so that the rows of cells R1 and R2 are arranged next to one another, in particular along an in 1 illustrated by a double arrow 15 and perpendicular to the respective longitudinal direction of the respective memory cell 2 and perpendicular to the first straight line and perpendicular to the second straight line, which coincides with a direction referred to as the following direction. In particular, the memory cells 2 are designed to be identical or identical.

By means of the cell holder 12, which is designed separately from the contacting device 9 and separately from the memory cells 2, the domes 10 and 11 are held in the line elements 7 and thus secured, so that relative movements between the respective dome 10, 11 and the respective line element 7 are at least possible by means of the cell holder 12 are limited, in particular prohibited.

It can be seen that the contacting device 9 has several first structural units 16 and several second structural units 17. One of the structural units 16 is in 2 shown, and one of the structural units 17 is also in 2 shown. The structural units 16 are identical, that is, of identical construction, and the structural units 17 are identical, that is, of identical construction, with the respective structural unit 16 and the respective structural unit 17 differing from one another in their constructions. This is explained in more detail below. It can be seen that some of the structural units 16 and some of the structural units 17 are arranged on a first side SE1 of the memory cells 2, such that the structural units 16 and 17 arranged on the side SE1 are along the third straight line, that is to say along the line indicated by the double arrow 15 illustrated following direction, alternate, that is, arranged alternately one after the other. Some of the structural units 16 and some of the structural units 17 are arranged on a second side SE2 of the memory cells 2, the second side SE2 being opposite the first side SE1 in the longitudinal direction of the memory cells 2. The structural units 16 and 17 arranged on the second side SE2 are along the The following direction illustrated by the double arrow 15, i.e. along the third straight line, is arranged alternately, that is, alternately, one after the other.

The domes 10 are first domes or are also referred to as first domes, the domes 10 being supply domes that are inserted into the line elements 7 from the first side SE1. This is particularly good looking 7 recognizable. The temperature control fluid can be introduced into the line elements 7 via the supply domes (domes 10), as in 7 is illustrated by the arrows shown there. The domes 11 are second domes or are also referred to as second domes, the domes 11 (second domes) being inserted into the line elements 7 from the second side SE2 opposite the first side SE1 in the longitudinal direction of the respective memory cell 2. The second Dome 11 are particularly good 7 can be seen, discharge domes, via which the temperature control medium can be removed from the line elements 7, that is to say can be led out of the line elements 7. This is also in 7 illustrated by the arrows shown there. Out of 1 It can be seen that the feed domes are the domes 10 of the structural units 16 and 17 arranged on the first side SE1, and the domes 11 are the domes 11 of the structural units 16 and 17 arranged on the side SE2 Components 16 and 17 the temperature control agent is introduced into the line elements 7, the components 16 and 17 arranged on the side SE1 are also referred to as feed units. Since the temperature control agent is removed from the line elements 7 via the structural units 16 and 17 arranged on the side SE2, the structural units 16 and 17 arranged on the second side SE2 are also referred to as discharge units. This means that the in 2 The structural units 16 and 17 shown can be two of the discharge units or two of the feed units. The structural units 16 and 17, i.e. the discharge units and the feed units, are structural units, i.e. components or components of the contacting device 9. The contacting device 9 therefore has a dual function. On the one hand, the contacting device 9 is electrically contacted, in particular directly, with the contact areas of the memory cell 2, so that the memory cells 2 are electrically connected to one another via the contacting device 9. On the other hand, the temperature control agent is conducted by means of the contacting device 9, such that the temperature control agent is introduced into the line elements 7 by means of the contacting device 9 and is removed from the line elements 7. The cell holder 12 also has a dual function. On the one hand, the cell holder 12 is used to at least limit, and in particular prevent, relative movements between the memory cells 2. On the other hand, the cell holder 12 is used to secure the domes 10 and 11 in the line elements 7.

It can be seen that the respective cell row R1, R2 is assigned, in particular precisely, one of the supply units and, in particular precisely, one of the discharge units. Furthermore, one of the structural units 16 and, in particular precisely, one of the structural units 17 is assigned to the respective cell row R1, R2. For example, if the supply unit assigned to the respective cell row R1, R2 is formed by one of the structural units 16, then the discharge unit assigned to the respective cell row R1, R2 is formed by one of the structural units 17. Furthermore, it is provided that if the feed unit assigned to the respective cell row R1, R2 is formed by one of the structural units 17, the discharge unit assigned to the respective cell row R1, R2 is formed by one of the structural units 16. At the in 1 In the exemplary embodiment shown, the feed unit assigned to the cell row R1 is formed by one of the structural units 16 and the discharge unit assigned to the cell row R1 is formed by one of the structural units 17, and the feed unit assigned to the cell row R2 is formed by one of the structural units 17, and the discharge unit assigned to the cell row R2 is formed by one of the structural units 16.

Out of 2 It can be seen that the domes 10, 11 of the respective structural unit 16, 17 form a dome group, the domes 10, 11 of the respective structural unit 16, 17 forming the dome group being mechanically connected to one another by a respective connecting element 18 of the respective structural unit 16, 17. Out of 7 It can be seen that the respective connecting element 18 has a channel 19 which is common to the domes 10, 11 of the dome group and through which the temperature control medium can flow, via which the temperature control medium can be fed to the domes 10, 11 of the dome group or can be removed from the domes 10, 11 of the dome group. If, for example, the structural unit 16, 17 is used as one of the supply units, the channel 19 is a supply channel via which the temperature control medium can be fed to the domes 10, 11 of the dome group. If the respective structural unit 16, 17 is used, for example, as one of the discharge units, the channel 19 is or functions as a discharge channel via which the temperature control medium can be removed from the domes 10, 11 of the dome group. If the structural unit 16, 17 is used as one of the feed units, the domes 10, 11 of the dome group are the previously described feed domes (domes 10). If the respective structural unit 16, 17 is used as one of the discharge units, the domes 10, 11 of the dome group are the discharge domes (domes 11).

With regard to the structural units 16 and 17 (feed units) arranged on the side SE1, the respective connecting element 18 is the respective one gen feed unit a respective supply line element, which is common to the respective feed domes (domes 10) of the respective feed unit and through which the temperature control agent can flow, via which the respective feed domes of the respective feed unit can be supplied with the temperature control agent. With regard to the structural units 16 and 17 (discharge units) arranged on the side SE2, the respective connecting element 18 of the respective discharge unit is a discharge line element which is common to the respective discharge domes (domes 11) of the respective discharge unit and through which the temperature control agent can flow, into which the temperature control agent from the respective Discharge domes of the respective discharge unit can be initiated, so that the temperature control medium can be removed from the respective discharge domes of the respective discharge unit via the respective discharge line element of the respective discharge unit.

Out of 1 It can be seen that the holder part 13 is arranged on the side SE1 and the holder part 14 on the side SE2. The holder parts 13 and 14 are designed separately from one another and connected to one another, so that the supply domes are held in the line elements 7 by means of the holder part 13 and the discharge domes are held in the line elements 7 by means of the holder part 14, that is to say they are secured.

The first holder part 13 has a first cover element 20 arranged on the first side SE1, from which first column parts point in a first direction pointing from the first side SE1 and from the first cover element 20 to the second side SE2, illustrated by an arrow 21 22 stand out. The second holder part 14 has a second cover element 23 arranged on the second side SE2, from which in a first direction pointing from the second SE2 and from the second cover element 23 to the first side SE1 and thus to the first cover element 20 second column parts 25 of the second holder part 14 protrude in the opposite direction and illustrated by an arrow 24. A respective one of the first column parts 22 and a respective one of the second column parts 25 form a respective pair of column parts 29, which is particularly good 7 is recognizable. The respective, second column part 25 of the respective pair of column parts 29 adjoins the respective, first column part 22 of the respective pair of columns 29 in the first direction. The respective column parts 22 and 25 of the respective pair of column parts 29 are connected to one another, in particular locked together. In particular, for example, the first holder part 13 is supported in the first direction, in particular directly, on the feed units. Furthermore, it is conceivable that the second holder part 14 is supported on the discharge units, in particular in the second direction, in particular directly. As a result, the domes 10 and 11 are held securely and firmly in the line elements 7.

If necessary, the respective line element 7 and/or the respective dome 10, 11, in particular on the side of the temperature control medium, also referred to as fluid, can be insulated, for example by a coating and/or painting and/or in another way. The background in this regard may be that the line element 7 is formed, for example, as a tube and/or as a solid body and/or made of a metallic material and/or is formed of an electrically conductive material and/or is formed, for example, as a tube and/or as a solid body and/or dome 10, 11 formed from a metallic material and/or formed from an electrically conductive material can be, for example, an anode (-), but the connecting element 18 can sometimes be the anode (-) and sometimes the cathode (+). contact electrically. The insulation can prevent a short circuit.

It can be seen that the respective dome 10, 11 is sealed against the respective line element 7, into which the respective dome 10, 11 is inserted, by means of a respective sealing element 42 which is formed separately from the respective line element 7 and separately from the respective dome 10, 11 is sealed. The sealing element, also simply referred to as a seal, could be designed, for example, as an L-shaped seal. In the present case it is provided that at least the first of the sealing elements 42 are arranged in corresponding indentations 43 of the respective cell housing 4.

The sealing element, for example and therefore only optionally designed as an O-ring, keeps the respective dome 10, 11 away from the line element 7, for example designed as an inner tube, and at an electrical potential of, for example, 4 volt potential, a distance should be between the respective dome 10, 11 and the line element must be at least 1.6 millimeters in order to ensure air and sufficient creepage distances. It is conceivable to completely electrically insulate the connecting element 18 inside and outside, in particular except for points where a respective electrical contact is desired.

The respective column part pairs 29 are assigned to the respective memory cell 2. The respective pairs of column parts 29 assigned to the respective storage cell 2 are arranged successively and spaced apart from one another in the circumferential direction extending around the longitudinal direction of the respective storage cell 2 to which the respective pairs of column parts 29 are assigned. The respective one Circumferential direction of the respective memory cell 2 is in 11 illustrated by a double arrow 30.

Out of 2 It can be seen that the respective domes 10, 11 of the respective dome group and thus of the respective structural unit 16, 17 protrude in a first distance direction from the respective connecting element 18 of the respective structural unit 16, 17. The first distance direction is illustrated by an arrow 31. The respective structural unit 16 now differs in particular from the respective structural unit 17 in that contacting fingers 32 protrude from the respective connecting element 18 of the respective structural unit 16 in a second spacing direction illustrated by an arrow 26, the second spacing direction being oblique or, in this case, perpendicular to the first spacing direction runs. The respective structural unit 17 does not have these contacting fingers 32. In particular, it is conceivable that the respective connecting element 18 and the respective contacting fingers 32 are formed in one piece with one another, and are therefore formed from a single piece. Out of 11 It can be seen that the respective contacting finger 32 is electrically contacted with one of the electrical connection elements of one of the memory cells 2. In relation to the cell row R1, for example, the following is provided: For example, the connecting element 18 of the structural unit 16 arranged on the first side SE1 and assigned to the cell row R1 is electrically contacted with the cathodes + the memory cells 2 of the cell row R1, whereby, for example, the cathodes of the memory cells 2 of the Cell row R1 are electrically connected to one another via the connecting element 18 of the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1, or the connecting element 18 of the structural unit 16 arranged on the first side SE1 and assigned to the cell row R1 is from the cathodes + der Memory cells 2 of the cell row R1 electrically insulated or galvanically separated. The respective contacting finger 32 of the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1 is electrically contacted with the respective anode - the respective memory cell 2 of the cell row R2. In addition, the respective contacting finger 32 of the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1 is electrically contacted with the respective cathode + the respective memory cell 2 of the cell row R1.

The structural unit 17 assigned to the cell row R2 and arranged on the first side SE1 and following along the third straight line to the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1, the domes 10 of which are used as feed domes, by means of which the temperature control agent is fed into the Line elements 7 of the memory cells 2 of the cell row R2 can be introduced, for example, are not electrically contacted with either the anodes or the cathodes + of the memory cells 2 of the second cell row R2. For this purpose, for example, the structural unit 17 assigned to the cell row R2 and arranged on the first side SE1 is electrically insulated from the two contact areas, that is to say from both the respective anode and the respective cathode of the respective memory cell 2 of the cell row R2. Furthermore, the structural unit 17 assigned to the cell row R2 and arranged on the first side SE1 and following along the third straight line to the structural unit 16 assigned to the cell row R1 and arranged on the first page SE1 is neither with the anodes nor with the cathodes + of the memory cells 2 first cell row R1 electrically contacted. Furthermore, the structural unit 17 assigned to the cell row R2 and arranged on the first side SE1 and following along the third straight line to the structural unit 16 assigned to the cell row R1 and arranged on the first page SE1 is not one with either the anodes or the cathodes + the memory cells 2 third cell row R3 is electrically contacted, which immediately follows the second cell row R2 along the third straight line. For example, the structural unit 17 assigned to the cell row R2 and arranged on the first side SE1 and following the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1 is electrically contacted with no contact areas of the memory cells 2 along the third straight line.

With regard to the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2, it behaves, for example, with respect to the memory cells 2 of the cell row R2, as with the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1 with respect to the memory cells 2 the cell row R1. It is therefore provided, for example, that the connecting element 18 of the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2 is electrically contacted with the cathodes of the memory cells 2 of the cell row R2, so that, for example, the cathodes of the memory cells 2 of the cell row R2 via the connecting element 18 of the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2 are electrically connected to one another, or the connecting element 18 of the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2 is electrically connected to the cathodes of the memory cells 2 of the cell row R2 isolated or galvanically isolated.

The respective contacting finger 32 of the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2 is electrically contacted with the respective anode - the respective memory cell 2 of the third cell row R3. Furthermore, is the respective contacting finger 32 of the structural unit 16 assigned to the cell row R2 and arranged on the second side SE2 is electrically contacted with the respective cathode - the respective memory cell 2 of the second cell row R2. It can be seen that third of the memory cells 2 are arranged one after the other along a fourth straight line and thereby form the third row of cells R3, which is arranged along the third straight line and thus along the following direction illustrated by the double arrow 15 next to the second row of cells R2, such that the second cell row R2 is arranged along the third straight line between the cell rows R1 and R3. With regard to the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1, the behavior with respect to the memory cells 2 of the cell row R3 is the same as that of the structural unit 16 assigned to the cell row R1 and arranged on the first side SE1 with respect to the memory cells 2 of cell row R1. This means that the connecting element 18 of the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1 is electrically contacted with the cathodes of the memory cells 2 of the third cell row R3, so that the cathodes + of the memory cells 2 of the third cell row R3 via the connecting element 18 the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1 are electrically connected to one another, or the connecting element 18 of the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1 is electrically connected by the cathodes + the memory cells 2 of the third cell row R3 and, for example, also from their anodes - isolated. The respective contacting finger 32 of the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1 is electrically contacted with the respective anode - the respective memory cell 2 of a fourth cell row R4, with fourth of the memory cells 2 being arranged one after the other along a fifth straight line and thereby the fourth row of cells form R4. The respective contacting finger 32 of the structural unit 16 assigned to the cell row R3 and arranged on the first side SE1 is also electrically contacted with the respective cathode + the respective memory cell 2 of the third cell row R3. The fourth row of cells R4 is arranged along the third straight line next to the third row of cells R3, so that the third row of cells R3 is arranged between the rows of cells R2 and R4 along the third straight line. This results in that the anodes and cathodes of the memory cells 2 and thus the memory cells 2 along or across an in 8th are electrically connected to each other through the connection path illustrated by a dashed line. For example, the respective structural unit 16, 17 can be materially connected, in particular welded, to the respective storage cell 2.

Out of 9 It can be seen that the respective cell housing 4 can have a respective housing jacket 33, which can be arranged or run between the respective end faces S1 and S2 of the respective storage cell 2, in particular along the respective longitudinal extension direction of the respective storage cell 2. For example, at least part of the cathode is formed by the housing jacket 33. Furthermore, it is conceivable that, for example, one, in particular further, part of the cathode is formed by the end face S1 and/or S2. Furthermore, it is conceivable that at least part of the anode is formed by the end face S2 and/or S2.

In 4 an electrical insulation element is shown in a schematic perspective view and designated 34. For example, the insulation element is designed as a coating and/or as a film and/or made of a plastic and/or made of a lacquer. All possible embodiments, materials and configurations are conceivable for realizing the insulation element 34. The insulation element 34 is used, for example, to avoid electrical contact of the respective connecting element 18 with the contact areas of the respective memory cell 2. Thus, for example, with regard to the respective structural unit 16, it can be provided that the electrical insulation element 34 is arranged, in particular in the longitudinal direction of the respective memory cell 2, between the respective connecting element 18 of the respective structural unit 16 and the respective cathode and/or the respective anode of the respective memory cell 2 , so that the respective connecting element 18 of the respective structural unit 16 is electrically insulated from the respective cathode and/or anode of the respective memory cell 2 by means of the insulation element 34. The insulation element 34 can alternatively or additionally also be used for the respective connecting element 18 of the respective structural unit 17, so that it is conceivable that the insulation element 34 between the respective connecting element 18 and the respective structural unit 17 and the respective anode and/or the respective cathode of the respective Memory cell 2 is arranged. It is therefore conceivable that the respective connecting element 18 of the respective structural unit 17 is electrically insulated from the respective anode and/or the respective cathode of the respective memory cell 2 by means of the electrical insulation element 34. For example, the electrical insulation element 34 can be a film, which is also referred to as an insulation film. The insulating element 34 can be arranged loosely on the respective connecting element 18, or the insulating element 34 is glued to the connecting element 18 or glued onto the connecting element 18 or, in particular as a varnish and/or coating and/or otherwise, applied to the connecting element 18, so that, for example, the connecting element 18 is provided, in particular coated, with the insulating element 34.

In 3 an insulation area 27 is illustrated by dashed lines, in which, for example, a further electrical insulation element can be arranged or is arranged. By means of the further electrical insulation element, for example, the respective contacting finger 32 can be electrically insulated from at least or exactly one of the contact areas of the respective memory cell 2, so that, for example, by means of the further electrical insulation element, it is avoided that the respective contacting finger 32 touches both contact areas of the respective memory cell 2 at the same time, Therefore, both contact areas of the respective memory cell 2 are electrically contacted at the same time. Alternatively or in addition to using the further electrical insulation element, it would be conceivable for the respective contacting finger 32 to have an indentation through which the respective contacting finger 32 is spaced from one of the contact areas of the respective memory cell 2, thereby making electrical contacting of the respective contacting finger 32 with the respective one , a contact area of the respective memory cell 2 is avoided. This can also prevent the respective contacting finger 32 from electrically contacting both contact areas of the respective memory cell 2 at the same time. In particular, it is conceivable that the respective contacting finger 32 is materially connected, in particular welded, to the respective memory cell 2, that is to say to the respective contact area of the respective memory cell 2.

For example, the domes 10, 11 of the respective structural unit 16, 17 are designed separately from one another and separately from the respective connecting element 18 of the respective structural unit 16, 17. It is conceivable that the respective dome 10, 11 of the respective structural unit 16, 17 is cohesively connected to the respective connecting element 18 of the respective structural unit 16, 17. In particular, the respective dome 10, 11 can be soldered or welded to the respective connecting element 18 of the respective structural unit 16, 17. The connecting element 18 can be designed, for example, as an extrusion profile. Furthermore, it is conceivable that the respective structural unit 16, 17 is designed in one piece, and is therefore formed from a single piece, whereby it is conceivable that the respective structural unit 16, 17 can be produced, for example, by spraying, in particular by die casting.

In 6 A starting workpiece is shown in a schematic perspective view and designated 36. In 6 For example, areas are designated 37, the areas 37 being separated from the rest of the starting workpiece 36 in particular by punching, in particular by punching out, in order to thereby produce, for example, the structural unit 16 having the contacting fingers 32 from the starting workpiece 36. Out of 6 It can be seen that in the starting workpiece 36 the channel 19 is still open at both ends. In order to close the channel 19 at one of its two ends, for example, the connecting element 18, in particular the extrusion profile, is formed at one end in such a way that two wall regions delimiting the channel 19 are moved towards one another, in particular pressed together. This is over 5 recognizable. In 5 is one end of the channel 19, which is or is closed at one end, designated E1. It is conceivable to weld the connecting element 18 at one end E1, in particular by means of a laser, in order, for example, to be able to securely close and thus seal the channel 19 at one end E1.

Out of 10 It can be seen that the connecting element 18 can have a connection 40. For example, a line part designed separately from the connecting element 18 can be mechanically and fluidly connected to the connection 40, so that the temperature control medium can flow through the line part and the channel 19 and thus the connecting element 18. As in 10 is illustrated by arrows, for example the connection 40 arranged on the first side SE1 can be an inlet, so that the domes 10 then function as supply domes. Accordingly, the connection 40 arranged on the second side SE2 is a return line through which the temperature control medium flowing through the discharge domes (dome 11) flows. The reverse is conceivable, so that the connection 40 arranged on the side SE1 can function as a return and thus the domes 10 can function as discharge domes. As a result, the connection 40 arranged on the side SE2 can function as an inlet, so that the domes 11 arranged on the second side SE2 then function as supply domes.

Reference symbol list

1

electrical energy storage

2

Memory cells

3

Double arrow

4

Cell casing

5

Recording room

6

Storage facility

7

Line element

8th

channel

9

Contacting device

10

Cathedral

11

Cathedral

12

Cell holder

13

first holder part

14

second holder part

15

Double arrow

16

first structural unit

17

second structural unit

18

connecting element

19

channel

20

first cover element

21

Arrow

22

first column part

23

second cover element

24

Arrow

25

second column part

26

Arrow

27

Isolation area

29

Pair of column parts

30

Double arrow

31

Arrow

32

Contacting finger

33

Housing jacket

34

Insulation element

36

Starting workpiece

37

Area

40

Connection

42

Sealing element

43

indentation

E1

End

R1

Cell row

R2

Cell row

R3

Cell row

R4

Cell row

S1

front side

S2

front side

SE1

Page

SE2

Page

+

cathode

-

anode

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

• US 2019/0393571 A1 [0002]
• DE 10202807 A1 [0002]
• DE 102018213637 A1 [0002]

Claims (16)

Electrical energy storage (1) for storing electrical energy for a motor vehicle, with a plurality of storage cells (2) designed to store the electrical energy, each of which has a cell housing (4) delimiting a receiving space (5) and a temperature control medium through which flows and the receiving space (5) have a penetrating line element (7), and with a contacting device (9) formed separately from the memory cells (2), via which the memory cells (2) are electrically connected to one another, characterized in that: - the contacting device (9) of domes (10, 11) through which the temperature control fluid can flow and which are inserted into the line elements (7), via which the temperature control medium can be introduced into the line elements (7) and/or removed from the line elements (7), and - the storage cells (2). a cell holder (12) which is formed separately from the memory cells (2) and separately from the contacting device (9) and which at least limits relative movements between the memory cells (2), by means of which the domes (10, 11) are held in the line elements (7). are. Electrical energy storage (1). Claim 1 , characterized in that: - first of the domes are designed as feed domes inserted into the line elements (7) from a first side (SE1), via which the temperature control medium can be introduced into the line elements (7), and / or - second of the domes ( 10, 11) are designed as discharge domes inserted into the line elements (7) from a second side (SE2) opposite the first side (SE1), via which the temperature control medium can be removed from the line elements (7). Electrical energy storage (1). Claim 2 , characterized in that the contacting device (9) has a supply line element common to the supply domes and through which the temperature control medium can flow, via which the supply domes can be supplied with the temperature control medium. Electrical energy storage (1). Claim 2 or 3 , characterized in that the contacting device (9) has a discharge line element common to the discharge domes and through which the temperature control agent can flow, into which the temperature control agent can be introduced from the discharge domes, so that the temperature control agent can be removed from the discharge domes via the discharge line element. Electrical energy storage (1) according to one of the Claims 2 until 4 , characterized in that : - the cell holder (12) has a first holder part (13) arranged on the first side (SE1), by means of which the feed domes are held in the line elements (7), - the cell holder (12) has a has a second holder part (14) arranged on the second side (SE2), by means of which the discharge domes are held in the line elements (7), and - the holder parts (13, 14) are designed separately from one another and connected to one another. Electrical energy storage (1). Claim 5 , characterized in that the respective holder part (13, 14) is formed in one piece. Electrical energy storage (1). Claim 5 or 6 , characterized in that: - the first holder part (13) has a first cover element (20) arranged on the first side (SE1), from which in one of the first side (SE1) and of the first cover element (20). first column parts (22) of the first holder part (13) protrude from the first direction (21) pointing to the second side (SE2), - the second holder part (14) has a second cover element (23) arranged on the second side (SE2), from which second column parts (25) of the second holder part ( 14), - a respective one of the first column parts (22) and a respective one of the second column parts (25) form a respective pair of column parts (29), the respective second column part (25) of which is in the first direction (21) on the respective, first column part (22) of the respective pair of column parts (29) connects, and - the respective column parts (22, 25) of the respective pair of columns (29) are connected to one another. Electrical energy storage (1) according to one of the preceding claims, characterized in that : - at least some of the domes (10, 11) form a dome group, the domes (10, 11) of which are mechanically connected to one another by a connecting element (18) of the contacting device (9). are connected, - the connecting element (18) has a channel (19) which is common to the domes (10, 11) of the dome group and through which the temperature control medium can flow, via which the temperature control medium can be fed to the domes (10, 11) of the dome group or from the domes ( 10, 11) of the cathedral group can be removed. Electrical energy storage (1). Claim 8 , characterized in that contacting fingers (32) protrude from the connecting element (18), one of the contacting fingers (32) being electrically contacted with an electrical connection element (+, -) in each case one of the memory cells (2). Electrical energy storage (1). Claim 9 , characterized in that between the respective contacting finger (32) and each further connection element (+, -) of the respective memory cell (2), the respective contacting finger (32) is electrically contacted with its respective one connection element (+, -), an electrical insulation element (34) is arranged, by means of which the respective contacting finger (32) is electrically insulated from the respective, further connection element (+, -). Electrical energy storage (1) according to one of the preceding claims, characterized in that the respective dome (10, 11) is connected against the respective line element (7), into which the respective dome (10, 11) is inserted, by means of a respective, separate from the respective line element (7) and separately from the respective dome (10, 11) formed sealing element (42). Electrical energy storage (1). Claim 11 , characterized in that at least the first of the sealing elements (42) are arranged in corresponding indentations (43) of the respective cell housing (4). Electrical energy storage (1). Claim 12 , characterized in that at least one respective component of the respective storage cell (2), which is formed separately from the respective cell housing (4) and arranged in the respective receiving space (5), is fixed to the respective cell housing (4) by the respective indentation (43). . Electrical energy storage (1). Claim 13 , characterized in that the respective component comprises a respective contact element and/or a respective electrical heating element. Motor vehicle, with at least one electrical energy storage (1) according to one of the preceding claims. Electrical energy storage (1) for storing electrical energy for a motor vehicle, with a plurality of storage cells (2) designed to store the electrical energy, each of which has a cell housing (4) delimiting a receiving space (5) and a temperature control medium through which flows and the receiving space (5) have a penetrating line element (7), and with a contacting device (9) formed separately from the memory cells (2), via which the memory cells (2) are electrically connected to one another, characterized in that: - the respective line element (7) a respective dome through which the temperature control medium can flow and which is inserted into a channel system of the contacting device (9) through which the temperature control medium can flow, wherein the temperature control medium can be introduced from the channel system of the contacting device (9) into the line elements (7) via the domes and/or from the Line elements (7) can be removed and introduced into the channel system of the contacting device (9), and - the memory cells (2) are formed separately from the memory cells (2) and separately from the contacting device (9) and relative movements between the memory cells (2) at least limiting cell holder (12) are held, by means of which the domes are held in the line elements (7).

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