DE102021106470A1 - Electrical energy store for a motor vehicle and motor vehicle - Google Patents

Abstract

The invention relates to an electrical energy store (1) for storing electrical energy for a motor vehicle, having a plurality of storage cells (2) designed to store electrical energy, which are each arranged at least one on a respective end face (S1) of the respective storage cell (2). Having an electrode connection (4) via which the electrical energy stored in the respective storage cell (2) can be made available by the respective storage cell (2), with a cell holder (6) which is formed separately from the storage cells (2) and on which the storage cells ( 2) are held, as a result of which relative movements between the storage cells (2) are at least limited, and with a contacting device (10) which is designed separately from the cell holder (2) and is held on the cell holder (2) and which is connected to the end faces (S1 ) Arranged electrode terminals (4) is electrically connected, whereby the memory cells (2) via the contact conditioning device (10) are electrically connected to one another, comprising at least one temperature control line (13) which is formed separately from the cell holder (6), is held on the cell holder (6) and through which a temperature control fluid can flow, through which the electrode connections (4) to the cell holder (6 ) are each at least partially overlapped, so that the temperature of the electrode connections (4) can be controlled via the temperature control line (13) by means of the temperature control fluid.

Description

The invention relates to an electrical energy store for a motor vehicle according to the preamble of patent claim 1. The invention also relates to a motor vehicle with at least one such energy store.

Of the DE 11 2012 007 185 B4 or the JP 607 9787 B2 an electric storage device is known to be taken out. The electrical storage device includes a plurality of electrical storage elements, each of the elements extending in a predetermined direction and having a positive electrode terminal and a negative electrode terminal at both ends in the predetermined direction. the EP 2 509 134 B1 or the JP 499 0422 B1 discloses a battery module in which a plurality of cells are aligned. In addition, from the DE 10 2015 013 800 A1 or from the CN 105 552 264 B discloses a battery adhesive fixing structure having a plurality of battery cells and a holder including a plurality of holder holes for holding the battery cells therein.

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 of the electrical energy storage device can be implemented.

This object is achieved according to the invention by an electrical energy store having the features of patent claim 1 and by a motor vehicle having the features of patent claim 15 . Advantageous configurations of the invention are the subject matter of the dependent claims.

A first aspect of the invention relates to an electrical energy store, also referred to simply as a store, for storing, in particular electrochemically, electrical energy or electrical current for a motor vehicle. The electrical energy store is preferably 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 store. The motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, has the electrical energy store in its fully manufactured state. The electrical energy store is preferably 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 is very preferably several hundred volts. As a result, for example, particularly high electrical power can be realized 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 energy store. 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 very preferably amounts to several hundred volts.

The energy store has a plurality of storage cells in or by means of which the electrical energy is or is to be stored, in particular electrochemically. The memory cells are also referred to as cells and are individual cells, ie components that are formed separately from one another. In particular, the respective storage cell is a battery cell, hence a secondary cell. Expressed again in other words, it is preferably provided that the respective storage cell is designed as an accumulator or as an accumulator cell. The respective storage cell has at least one respective end face and at least one electrode connection which is arranged on or on the respective end face and is also referred to simply as a connection or terminal. The respective storage cell can provide the electrical energy stored in the respective storage cell via the electrode connection. In addition, the respective storage cell can be supplied with electrical energy via its respective electrode connection, which can thus be stored in the respective storage cell. In particular, it is conceivable that the respective storage cell has at least or exactly two electrode connections. The electrode connections can both be arranged on the respective end face, so that the electrode connections can be arranged on the same end face of the respective storage cell. It is also conceivable that a first of the electrode connections is arranged on the respective end face and the second electrode connection is arranged on a respective, second end face of the respective storage cell, with the second end face facing away from the first end face. In other words, the faces facing away from each other. The at least one electrode connection is thus arranged on the respective first end face. When the electrode connection is mentioned below, it is unless otherwise stated, this is to be understood as meaning the at least one electrode connection, with the previous or present statements relating to the electrode connection also being applicable to the other electrode connection that may be provided, and vice versa. If the end face is mentioned below, unless otherwise stated, this means the respective first end face on which the electrode connection is arranged. One of the electrode connections is, for example, an electrical positive pole of the respective storage cell and is therefore also referred to as the cathode. The other electrode connection is, for example, a respective negative pole of the respective storage cell and is therefore also referred to as an anode. This means that the at least one electrode connection can be the electrical positive pole or the electrical negative pole of the respective storage cell. If both electrode connections are arranged on the same, respective end face, then the anode and the cathode of the respective storage cell are arranged on the same, respective end face. It is conceivable that the respective storage cell has a longitudinal extent and thus a direction of longitudinal extent, along which the respective storage cell has a first external dimension. The respective storage cell has a second external dimension along a first direction running perpendicular to the direction of longitudinal extent, and the respective storage cell has a third external dimension along a third direction running perpendicular to the direction of longitudinal extent and perpendicular to the first direction. It is provided in particular that the first external dimension is larger than the second external dimension and larger than the third external dimension, because it is conceivable that the second external dimension and the third external dimension are the same, in particular when the respective storage cell is designed as a round cell is. It is provided in particular that the end faces of the respective storage cell are arranged at respective opposite ends of the respective storage cell in the direction of longitudinal extension of the respective storage cell or form the respective ends. In other words, provision is preferably made for the respective storage cell to end at its respective end faces along its respective longitudinal direction, so that the respective end faces of the respective storage cell are opposite one another or facing away from one another in the longitudinal direction of the respective storage cell.

The electrical energy store has a cell holder which is designed separately from the storage cells and is also simply referred to as a holder, on which the storage cells are held, in particular directly, as a result of which relative movements between the storage cells are at least limited, in particular prevented. In particular, the storage cells are held together or held together via the cell holder. This means in particular that the storage cells are held relative to one another by means of the cell holder in a pattern predetermined by the cell holder. Provision is also particularly preferably made for the storage cells to be held at a respective distance from one another, in particular in pairs, by means of the cell holder, so that it is preferably provided that the storage cells do not touch one another directly.

Furthermore, the electrical energy store comprises a contacting device which is designed separately from the storage cells and separately from the cell holder and is held, in particular directly, on the cell holder. Because the contacting device is held, in particular directly, on the cell holder, relative movements between the contacting device and the cell holder and relative movements between the contacting device and the respective storage cell are at least limited, in particular prevented. The contacting device is electrically connected, in particular directly, to the electrode connections arranged on or on the respective end faces, i.e. to the respective at least one electrode connection of the respective storage cell, so that the contacting device preferably connects the respective at least one electrode connection to the respective end side of the respective storage cell arranged electrode terminal of the respective memory cell touches directly. As a result, the storage cells are electrically connected to one another via the contact-making element and via their respective electrode connections. The storage cells can be electrically connected to one another by means of the contacting device in such a way that the storage cells are electrically connected to one another in a parallel circuit, and are therefore connected in parallel. Furthermore, it is conceivable for the memory cells to be electrically connected to one another by means of the contacting device in such a way that the memory cells are electrically connected to one another in a series connection, and are therefore connected in series or in series.

In order to be able to temperature-control the energy store, in particular the storage cells, particularly advantageously, i.e. to cool and/or heat it, it is provided according to the invention that the electrical energy store is at least one separately from the cell holder and preferably also separately from the contacting device and separately from the storage cells trained and also referred to as the first temperature control line, which, in particular directly, is held on the cell holder, whereby relative movements between the temperature control line and the cell holder are at least limited, in particular prevented. If the temperature control line is mentioned below, unless otherwise stated, this means the first temperature control line.

A temperature control fluid can flow through the temperature control line. The tempering fluid is preferably a liquid which preferably at least partially, in particular exclusively, contains water. The electrode connections are towards the cell holder, i.e. in a respective direction pointing away from the electrode connection and pointing towards the cell holder, which preferably runs parallel to the respective longitudinal direction of extent of the respective storage cell or coincides with the respective longitudinal direction of extent of the respective storage cell, through the temperature control line at least partially, in particular at least predominantly and thus at least more than half or completely, overlaps or covers. This means in particular that the respective electrode connection towards the cell holder, i.e. in the direction pointing away from the respective electrode connection and pointing towards the cell holder, at least partially overlaps or overlaps through a respective wall area of the temperature control line, which is preferably designed as a solid and/or inherently strong or dimensionally stable is covered. As a result, the respective electrode connections can be temperature-controlled via the temperature-control line by means of the temperature-control fluid flowing through the temperature-control line, that is to say to cool and/or heat them. This means in particular that a particularly advantageous heat exchange between the temperature control fluid flowing through the temperature control line and the respective electrode connection can take place via the temperature control line. For example, if the tempering fluid has a higher temperature than the respective electrode connection, then heat can be transferred from the tempering fluid to the respective electrode connection via the temperature control line, whereby the respective electrode connection and thus the respective storage cell are heated. If, for example, the temperature control fluid has a lower temperature than the respective electrode connection, heat can be transferred from the respective electrode connection to the temperature control fluid flowing through the temperature control line via the temperature control line, as a result of which the respective electrode connection and thus the respective storage cell can be cooled effectively and efficiently. Investigations have shown that effective and efficient temperature control of the respective storage cell can be achieved in particular by the respective storage cell being temperature controlled via its respective electrode connection, since the respective storage cell can advantageously emit heat and advantageously absorb heat via its respective electrode connection. As a result, a more effective and efficient temperature control of the storage cell can be implemented, for example, compared to a lateral temperature control of the respective storage cell. One or the above-mentioned, lateral tempering of the respective storage cell is to be understood as meaning that an outer circumferential lateral surface running in particular between the end faces of the respective storage cell, which can be cylindrical in particular if the respective storage cell is designed as a round cell, is tempered, for example by means of the temperature control fluid or a further temperature control fluid, which flows through a further, lateral line, for example.

In addition, the cell holder is used in the invention to hold both the storage cells and the contacting device and also the temperature control line. As a result, the storage cells, the cell holder, the contacting device and the temperature control line, since they are held together or connected to one another via the cell holder, can advantageously form a module that is easy to assemble or produce and easy to handle.

It is preferably provided that the temperature control line, in particular the respective conversion area of the respective temperature control line, is located between the cell holder, in particular a respective additional conversion area of the cell holder, and the respective electrode connection, in particular between the cell holder or between the respective additional conversion area of the cell holder and the Contacting device is arranged, which can preferably be arranged between the respective electrode connection and the line or the respective conversion area of the respective line.

In order to be able to realize a particularly advantageous heat exchange between the tempering fluid and the respective electrode connection, it is preferably provided that the contacting device touches the respective electrode connection directly.

Since the electrode connections are at least partially overlapped or covered by the temperature control line towards the cell holder, in particular towards a cover element of the cell holder, and since the electrode connections are also referred to as terminals, the temperature control line is not or not only a lateral temperature control line, but a terminal-side one Temperature control line, by means of which the electrode connections and through this the storage cells effectively and efficiently tempered, that is, can be cooled and / or heated. As already mentioned above, the respective electrode connection towards the cell holder, which is at least partially overlapped by the temperature control line, can be the cathode or the anode. In particular, it is conceivable that both the supply and the cathode of the respective storage cell towards the cell holder is at least partially overlapped or covered by the temperature control line. Furthermore, it is conceivable that, in relation to the cathode and the anode, only the cathode or only the anode is at least partially overlapped towards the cell holder by the temperature control line. It is conceivable that while the at least one respective electrode connection of the respective storage cell towards the cell holder is at least partially overlapped by the temperature control line, the respective other electrode connection of the respective storage cell towards the cell holder is at least partially overlapped by the temperature control line or by an in particular separately from the temperature control line is overlapped, through which the temperature control fluid or a second temperature control fluid can flow, so that the other electrode connection of the respective storage cell can also be temperature controlled via the second temperature control line by means of the temperature control fluid or by means of the second temperature control fluid.

The temperature control line, which is designed separately from the cell holder, is held on the cell holder, for example, in such a way that the temperature control line is clipped to the cell holder or clipped onto the cell holder, i.e. it is latched to the cell holder and is therefore positively connected to the cell holder and/or the temperature control line is connected to the Cell holder glued and/or welded to the cell holder and/or soldered to the cell holder. The cell holder is preferably a thermally conductive element or the cell holder comprises a thermally conductive element to which the temperature control line can be connected, in particular in the manner described above.

It is also conceivable that the respective lateral surface of the respective storage cell, which runs or is arranged between the respective end faces of the respective storage cell and includes the outer circumference, abuts, in particular directly, on the cell holder, in particular on at least one wall of the cell holder.

As a result, for example, a particularly advantageous heat exchange can take place between the outer peripheral lateral surface and the cell holder or the wall, so that a particularly advantageous heat exchange can take place between the outer peripheral lateral surface of the respective storage cell and the temperature control line, for example via the wall, in particular such that via the wall is particularly advantageous Heat can be transferred from the temperature control line or from the temperature control fluid to the outer peripheral lateral surface and/or vice versa. As a result, the respective storage cell can also be temperature-controlled on its respective outer peripheral lateral surface by means of the terminal-side temperature control line, specifically through the intermediary of the cell holder or the wall of the cell holder, as a result of which a particularly effective and efficient temperature control of the respective storage cell can be achieved. In particular, it is possible to combine the temperature control of the respective electrode connection with a temperature control of the respective outer peripheral lateral surface of the respective storage cell and thus with a lateral temperature control of the respective storage cell, as a result of which the respective storage cell can be temperature controlled effectively and efficiently. This is particularly advantageous when the cell holder and thus the wall are made of a thermally conductive material, in particular a plastic.

It is conceivable that a base body of the cell holder is formed from a first material, also referred to as the first holder material. For example, the first holder material is a plastic, it being conceivable for the base body to be produced by injection molding, in particular by injection molding. It is conceivable that the base body is provided with a layer that forms the wall or from which the wall is formed. The layer is preferably formed from a second material, also referred to as second holder material, which is different from the first holder material. For example, the second holder material has a higher thermal conductivity than the first holder material. The layer is, for example, a coating applied in particular to the base body or a film, which, for example, is formed separately from the base body and can be arranged on the base body. The cell holder, also referred to as a carrier, can be tapered locally. This means that plastic can be used to manufacture the cell holder or the wall and still ensure an advantageous heat exchange.

In a particularly advantageous embodiment of the invention, the temperature control line is designed as a flat strip, as a result of which the temperature control line has, in particular precisely, two broad sides facing away from one another. In addition, the temperature control line has, for example, exactly two narrow sides facing away from one another, which are arranged between the broad sides. Under the broad sides and the narrow sides is ins The following is to be understood in particular: the respective broadside preferably has a first extent, in particular a first width, running along a first direction of extent, it being preferably provided that the first extent of a first of the broadsides and the first extent of the second broadside are the same. The respective narrow side has a respective second extent, in particular a second width, with the second extent, in particular the second width, running along a second direction of extent, which runs obliquely or preferably perpendicularly to the first direction of extent. It is preferably provided that the second extension of a first of the narrow sides and the second extension of the second narrow side are the same. The broad sides and the narrow sides are characterized in particular by the fact that the respective first extension is larger than the respective second extension, it being preferably provided that the respective first extension is at least twice as large, in particular at least three times as large and very particularly at least four times is as large as the respective second extension. In addition, provision is preferably made for the first broad side to run in a first plane, with the second broad side running in a second plane which is at a distance from the first plane and/or preferably runs parallel to the first plane. One of the broad sides of the temperature control line faces the respective electrode connections, so that the other broad side faces away from the first broad side and from the electrode connections and, for example, faces the cell holder, in particular the cover element of the cell holder. This configuration of the temperature control line as a flat strip means that heat can be exchanged or transmitted between the electrode connections and the temperature control fluid over a particularly large area and in particular over one broad side of the temperature control line, so that particularly effective and efficient temperature control of the storage cells can be achieved. The feature that the temperature control line is designed as a flat strip and thus has the broad sides and the narrow sides means in particular that the temperature control line is designed as a flat strip with the broad sides, at least in the respective length areas, with the respective electrode connection to the cell holder through the respective longitudinal region designed as a flat strip is at least partially overlapped or covered. As a result, a particularly advantageous, terminal-side temperature control of the storage cells can be achieved.

Provision is preferably made for the temperature control line to be inherently strong or dimensionally stable. In particular, it is preferably provided that the temperature control line is designed as a solid body. Provision is very preferably made for the temperature control line to be designed in one piece. The temperature control line is made of a material which is preferably a thermally conductive material. In particular, the material can be a metallic material such as aluminum or copper. In particular, the material from which the temperature control line is formed has a thermal conductivity of at least 0.2 W*m ^-1 *K ^-1 , in particular greater than 0.2 W*m ^-1 *K ^-1 . In particular, the thermal conductivity is greater than 1.0 W*m ^-1 *K ^-1

At least in a partial area of the temperature control line, the temperature control line can have a circular flow cross section through which the temperature control fluid can flow. Alternatively or additionally, the temperature control line can have a flow cross section through which the temperature control fluid can flow that is flattened, in particular oval, at least in a partial area of the temperature control line. The flattened or oval cross section can be realized, for example, by first providing the temperature control line as a line that is circular in particular on the outer circumference and has a circular cross section through which the temperature control fluid can flow. Thereupon, for example, the temperature control line is compressed at least in the aforementioned length ranges or completely and thereby flattened, as a result of which the cross section is ovalized. In other words, the previously described flattened or oval cross section is produced from the initially circular cross section through which the temperature control fluid can flow, it being conceivable that the temperature control line is thereby further developed into the flat strip, which can be at least essentially oval or stadium-shaped on the outer circumference . It is also conceivable that the temperature control line, alternatively or additionally, has a stadium-shaped cross section through which the temperature control fluid can flow, at least in a partial area of the temperature control line. The stadium-shaped cross section or stadium shape is to be understood as meaning that the stadium shape is composed of a rectangle which is flush on both sides with semicircles which, in particular, merge tangentially into the rectangle arranged between the semicircles. The stadium shape thus has the shape of a running track. Due to the ovalization of the temperature control line, an available installation space can be used particularly advantageously. In addition, due to the ovalization of the temperature control line or the fact that the temperature control line is above or flattened or stadium-shaped on the outer circumference, a particularly large-area heat exchange between the respective electrodes connection and the tempering fluid are guaranteed.

The ovalization described above can be implemented, for example, by local flat pressing of the initially round temperature control line, for example, so that bending radii of the temperature control line remain round, for example, in order to avoid undesirable kinking of a temperature control channel through which the temperature control fluid can flow. By ovalizing or flattening the temperature control line, a calibration of the temperature control line can also be implemented, in particular with regard to its height, which is, for example, the aforementioned, respective second extension. This or the second extent thus runs along the second direction of extent, which runs, for example, parallel to the respective left direction of extent of the respective memory cell. The calibration of the height means that the height running in particular along the second direction of extent or along the longitudinal direction of extent of the respective storage cell can be adjusted as required, so that a particularly advantageous heat exchange between the tempering fluid and the respective connection (terminal) can be guaranteed. In addition, a particularly advantageous heat exchange between the cell holder and the temperature control line can be implemented, as a result of which the storage cells can be temperature controlled particularly well. In particular, particularly small or tight tolerances can also be maintained through the calibration. Another advantage of the temperature control line is that it can be manufactured in a particularly time- and cost-effective manner.

For example, first of the memory cells form a first row of cells and second of the memory cells form a second row of cells. This means in particular that the first memory cells are arranged along a first straight line and thus in the first row, while the second memory cells are arranged along a second straight line and thus in the second row, with the second straight line being inclined or preferably parallel to the first straight runs. It is particularly preferably provided that the temperature control line extends in a meandering manner, in particular from the first row of cells to the second row of cells. Thus, the temperature control line has, for example, at least one meander, which is formed by a first meander arm, a second meander arm and a meander bend, also referred to as a meander head. The meander arms run, for example, parallel or at an angle to one another. For example, the electrode connections of the first storage cells towards the cell holder are at least partially overlapped by the first meander arm, and the electrode connections of the second storage cells are at least partially overlapped towards the cell holder by the second meander arm, the meander arms being mechanically and fluidically connected to one another via the meander head , In particular such that the meander arms are formed integrally with each other and integrally with the meander head. In particular, due to the preferably one-piece configuration of the temperature control line, it can be realized that the temperature control line has exactly two line connections. A first of the line connections is an input of the temperature control line, and the second line connection is an output of the temperature control line. The temperature control fluid can be introduced into the temperature control line via the inlet of the temperature control line, and the temperature control fluid can be removed from the temperature control line via the outlet of the temperature control line. As a result, the temperature control lines of the energy storage devices can be produced particularly simply and thus in a time-saving and cost-effective manner, since many individual line parts that are designed separately from one another do not have to be mechanically and fluidly connected by corresponding joining effort. In addition, the temperature control fluid can be guided through the temperature control line, in particular through its temperature control channel, in a particularly streamlined manner, so that excessive pressure losses of the temperature control fluid flowing through the temperature control line can be avoided.

A further embodiment is characterized in that an insulation layer is arranged between the contacting device and the temperature control line, in particular along the second direction of extension or along the respective longitudinal direction of extension of the respective storage cell, by means of which the temperature control line is electrically insulated from the contacting device. The feature that the temperature control line is isolated from the contacting device by means of the insulating layer means that the insulating layer has an electrical conductivity of less than 10 ^-8 S*cm ^-1 so that the insulating layer itself is preferably designed as a non-conductor . As a result, an effective and efficient temperature control of the respective electrode connection can be implemented by means of the temperature control fluid, in particular via the insulating layer and preferably also the contacting device, without electrical short circuits occurring.

The insulation layer is preferably formed by an insulator which is formed separately from the cell holder and separately from the contacting device, which is preferably formed as a solid body. For example, the solid is a film formed from a plastic, or the solid is formed from paper.

In order to realize a particularly advantageous heat exchange between the temperature control fluid and the respective electrode connection via the insulation layer and the contacting device and thus to be able to ensure a particularly effective and efficient temperature control of the respective electrode connection, it is provided in a further embodiment of the invention that the insulation layer on the one hand the temperature control line , In particular one broad side of the temperature control line, and on the other hand directly touches the contacting device. The insulation layer is preferably formed separately from the temperature control line and separately from the contacting device, separately from the cell holder and separately from the memory cells.

In a further, particularly advantageous embodiment of the invention, the insulation layer is formed by an insulation element which is formed separately from the cell holder and is held, in particular directly, on the cell holder, which is preferably the aforementioned solid body. As a result, the electrical energy store can be produced in a particularly time-saving and therefore cost-effective manner, so that the effective and efficient temperature control of the respective electrode connection can only be achieved in a time-saving or cost-effective manner with the respective storage cell.
In a further, particularly advantageous embodiment of the invention, the respective storage cell is surrounded along its respective circumferential direction, in particular running around the respective longitudinal extension direction, by a plurality of column elements of the cell holder, which follow one another in the circumferential direction of the respective storage cell and are spaced apart from one another, and are supported directly on the column elements. For example, the respective pillar element comprises the aforementioned wall, on which the respective storage cell, in particular its outer peripheral lateral surface, bears directly. The respective memory cell can be held in a defined manner by means of the column elements, so that the memory cells can be held in a predetermined pattern relative to one another. In addition, a particularly advantageous exchange of heat can take place between the respective storage cell and the respective column element, in particular via the respective lateral surface of the respective storage cell on the outer peripheral side. In this way, for example, particularly advantageous heat can be exchanged via the respective column element between the respective outer peripheral lateral surface of the respective storage cell and the temperature control line, so that a particularly advantageous lateral temperature control of the respective storage cell can also be achieved.

A further embodiment, which can be viewed as a separate aspect, provides that the cell holder is provided with a material whose volume increases under the effect of heat. It is provided in particular that the cell holder is formed from at least one first material, the material being a different material from the first material. The material is also referred to as an intumescent material, swelling material, or intumescent material because the material increases in volume when the material is heated. In particular, heating the material leads to an increase in volume by a factor of at least ten, in particular by a factor of at least twenty and very particularly by a factor of at least twenty-five. Such intumescent materials are already well known from the general state of the art. The invention uses the intumescent material or its property that its volume increases greatly when exposed to heat, for example in order to be able to achieve a particularly high level of safety for the energy store. The intumescent material is characterized in particular by the fact that it begins to expand from a temperature of 140°C up to a temperature of 200 or 220°C, so that the volume of the material increases by at least twenty times, in particular at least that twenty-four to forty-four times the original volume. The material can be used in particular to provide fire and/or heat insulation. If, for example, a thermal event occurs in one of the storage cells, with one storage cell heating up considerably as a result of the thermal event, the intumescent material can be warmed up or heated as a result. As a result, the volume of the intumescent material is increased, in particular, for example, by at least twenty times its original value. As a result, one storage cell can be thermally insulated or shielded from the other storage cells, so that, for example, the thermal event can be prevented from spreading from one storage cell to another of the storage cells. As a result, a thermal propagation of the thermal event, also referred to as thermal propagation, ie an encroachment of the thermal event from one memory cell to another of the memory cells, can be avoided, so that particularly reliable operation of the energy store can be implemented in a particularly simple manner. A further advantage of the intumescent material is that in the event of a thermal event at one of the storage cells, the material expands precisely in such an area in which the material is warmed or heated as a result of the thermal event. This allows the one memory cell in which the thermal event occurred has come, are specifically thermally shielded or insulated from the other storage cells.

A further advantage of the intumescent material is that a particularly advantageous heat exchange can take place via the intumescent material, so that an advantageous temperature control of the respective storage cell can be achieved via the intumescent material, particularly in its non-swollen state.

In this regard, it has been shown to be particularly advantageous if, in a further advantageous embodiment of the invention, the electrical energy storage device is at least one separately from the temperature control line (first temperature control line) and separately from the cell holder and preferably also separately from the contacting device, separately from the storage cells and separately formed by the insulation layer, further temperature control line, which is preferably provided in addition to the first temperature control line and also preferably in addition to the second temperature control line and is formed separately from the second temperature control line. The temperature control fluid or another temperature control fluid can flow through the additional temperature control line. In addition, the additional temperature control line also has length areas referred to as additional length areas, with the additional length areas of the additional temperature control line running within the respective column element. As a result, the respective storage cell, in particular its respective outer peripheral lateral surface, can be temperature-controlled via the respective column element, in particular via the respective wall, and the respective additional length of the additional temperature control line by means of the temperature control fluid or by means of the additional temperature control fluid, which in particular enables lateral temperature control of the respective memory cell can be realized in an advantageous manner.

In this context, it has proven to be particularly advantageous if respective parts of the intumescent material are arranged within the respective column elements. Thus, for example, respective cavities between the respective parts and respective column elements can be filled at least partially, in particular at least predominantly or completely, by the parts of the intumescent material, so that a particularly advantageous heat exchange between the respective storage cell, in particular the respective outer peripheral lateral surface of the respective storage cell, and the respective further length range of the further temperature control line can be guaranteed via the respective column element and the respective part of the intumescent material. As a result, particularly effective and efficient lateral temperature control of the respective storage cell can be achieved.

It is possible that the intumescent material is cast into the respective column elements. This means that the intumescent material is introduced, in particular filled, into the column elements in the liquid state of the intumescent material and then hardens or solidifies, for example. In this way, additional mold elements for molding the intumescent material can be avoided since the column elements are used for molding the intumescent material. In addition, the intumescent material can fix the further length areas for lateral temperature control of the column elements.

In order to be able to provide the cell holder with the material in a particularly simple manner and thus to be able to produce the energy store in a particularly time-saving and cost-effective manner, it is provided in a further embodiment of the invention that the parts of the material arranged in the columns are connected to one another, in particular in one piece with one another trained, are. In particular, the parts are connected to one another via a connecting element which is in particular designed in one piece and which is arranged at least partially, in particular at least predominantly or completely, outside the column elements. It is conceivable that the parts are formed in one piece with the connecting element and thus in one piece with each other, so that, for example, the connecting element is also formed from the intumescent material. The connecting element and the parts form, for example, a comb, i.e. a comb-shaped element in which the parts are prongs projecting from the connecting element. Since the parts are connected to each other via the connecting element, the parts and the connecting element, hence the comb-shaped element, can be handled as a whole. It is particularly conceivable that during production of the energy store, the parts are handled, in particular via the connecting element, in such a way that the parts are moved relative to the column elements, in particular in a translatory manner, in such a way that the parts are moved into the column elements, in particular plugged in As a result, the parts are arranged in the column elements in a particularly simple, time-saving and cost-effective manner.

A further embodiment is characterized in that the electrical energy store is at least one separately from the cell holder and separately from the storage cells and preferably also separately from the contacting device, from the first temperature control line, separately from the insulating layer, separately from the further temperature control line and preferably also separately from the two th temperature control line trained, electronic computing device for monitoring at least some of the memory cells includes. The electronic computing device is also referred to as a battery management system (BMS) and is designed in particular to monitor a respective electrical voltage of the respective storage cell that can be monitored using the electronic computing device. In particular, the electronic computing device (BMS) is designed to carry out balancing of the memory cells or to the memory cells. In particular, it is conceivable for the electrical energy storage device to have a plurality of electronic computing devices that are designed separately from one another.

The BMS monitors, for example, not only the respective electrical voltage, but preferably also a respective temperature of the respective storage cell that can be monitored using the electronic computing device. In this way or for this purpose, a respective thermoresistivity can also be monitored, for example, since there is a direct connection between a respective electrical resistance of the respective storage cell and the temperature. Based on the resistance, the BMS knows how warm the respective cell is and can therefore control or regulate the supply of electrical energy (charging) and the removal (discharging) of electrical current. In the case of PTC thermistors, the electrical resistance increases as the temperature rises. There are also thermistors. At higher temperatures, these conduct better.

In this context, it has proven to be particularly advantageous if the cell holder has a cell receptacle for each storage cell, in which the respective storage cell is arranged. For example, the respective cell receptacle in which the respective storage cell is received is formed or delimited by the respective column elements, which are arranged one after the other and spaced apart from one another in the circumferential direction of the respective storage cell. In particular, it is conceivable for the pillar elements to be arranged in a uniformly distributed manner in the circumferential direction of the respective storage cell.

The cell holder also has at least one device receptacle which is provided in addition to the cell receptacles. The device receptacle has the same inner peripheral shape as at least a portion of the respective cell receptacle. In this case, at least a first partial area of the respective memory cell and at least a second partial area of the electronic computing device have the same shape on the outer circumference. Furthermore, it is provided that the second partial area of the electronic computing device is arranged in the device receptacle, as a result of which the electronic computing device is held on the cell holder. As a result, for example, relative movements between the electronic computing device and the respective memory cell are at least limited, in particular prevented. Since the device receptacle has the same shape as the respective cell receptacle, the cell holder can be manufactured particularly easily and thus inexpensively. In this case, the device receptacle can be used in a simple manner to hold the electronic computing device in the same or similar manner as the respective cell receptacle holds the respective memory cell accommodated in the respective cell receptacle. This embodiment is based in particular on the following findings: to protect the individual cells from overcharging, overheating due to overcharging and deep discharge and to achieve a sufficiently or at least substantially uniform discharge and charge of the storage cells and an advantageous performance, discharge or charge of the entire electrical To achieve energy storage, the cells will, in particular their respective electrical voltage, monitored by electronic computing devices. In particular, the battery management system is designed to control the respective storage cell. This makes it possible, for example, to set a power with which the respective storage cell is charged and/or with which the respective storage cell provides the electrical current stored in it. The battery management system is usually arranged centrally or in the vicinity of a battery pack formed by the storage cells. Furthermore, a separate, special holder for the battery management system is usually provided. In particular, depending on the type of cells and structure, it is expensive or not possible to implement a space-saving and at the same time modular or scalable electronic computing device (BMS). It is true that the battery management system usually does not require too much installation space. Nevertheless, an advantageous arrangement of the battery management system is difficult, since the pattern in which the cells are arranged and held by the holder should not be disturbed. This can lead to a high number of variants. Alternatively or additionally, this can result in at least or exactly one cell being dispensed with in order to create space for the battery management system. This adversely affects the volumetric density of the energy store. If the battery management system is outsourced, this can lead to complex routing of lines via which the battery management system is at least electrically connected to the storage cells. This in turn leads to difficult handling ability of the energy store and to a high weight of the energy store.

The previously mentioned problems and disadvantages can now be avoided. The invention makes it possible to design the battery management system (electronic computing device) as a compact and scalable electronic computing device that can be arranged in an unavoidable cavity or can use an installation space that is provided anyway in order to be arranged in the installation space. The electronic computing device can be stowed away in a space-saving manner and advantageously held without additional, separate components being required for this purpose.

For example, the electronic computing device is electrically connected to the electrode connections of the storage cells, in particular to the plus poles of the storage cells. In other words, the battery management system is preferably electrically connected to the electrode connections, in particular to the plus poles, of the storage cells. This connection takes place, for example, at one end of an assembly process during which the electrical energy store is produced. In particular, the battery management system is electrically connected to the electrode connections via line elements, also referred to as cables. The line elements, via which the battery management system is electrically connected to the electrode connections, are preferably guided in such a way that the line elements can be or are assembled by machine. The line elements, via which the battery management system is electrically connected to the electrode connections, are advantageously only plugged in. In other words, it is preferably provided that the line elements are electrically connected to the electrode connections of the storage cells, in particular exclusively, by respective plug-in connections, in particular via the contacting device. For this purpose, for example, the respective line element has a respective plug, and the contacting device has, for example, a corresponding second plug for each electrode connection to which the battery management system is electrically connected, the second plug being designed as a PIN, for example. It is conceivable that the first plug is connected to the second plug by a plug connection, in particular in such a way that the first plug is plugged onto the second plug, in particular onto the PIN. For example, the respective line element is designed as a curved line element, in particular as a curved cable. It is particularly conceivable that a line element part of the line element is connected to the first plug by flanges. It is also conceivable that the respective line elements are connected to the respective electrode connections by soldering, in particular directly or via the contacting device. The electronic arithmetic unit is, for example, held in an undercut and/or form-fitting manner on the cell holder, also referred to as a carrier, so that additional connection techniques and connection elements such as screws for holding the electronic arithmetic unit can be avoided. It is particularly conceivable that the battery management system (electronic computing device) is held on the cell holder without play, with this holder without play being able to be integrated into the electrical energy store without additional work steps.

In order to be able to mount the electronic computing device (BMS) in a particularly advantageous and simple manner, it is provided in a further embodiment of the invention that at least one of the cell receptacles in the circumferential direction of the storage cell, which is accommodated in one cell receptacle, is at least partially surrounded by a first wall area of the cell holder is directly limited. It is preferably provided that the storage cell in which the one cell receptacle is accommodated, in particular the outer peripheral lateral surface of the storage cell which is accommodated in the one cell receptacle, directly touches the first wall region of the cell holder. Thus, the first wall area is, for example, the aforementioned wall. The device receptacle is at least partially directly delimited in the circumferential direction of the second partial area of the electronic computing device by a second wall area of the cell holder which is formed in one piece with the first wall area. It is preferably provided that the second partial area rests directly on the second wall area of the cell holder.

Finally, in order to achieve a particularly advantageous temperature control and a particularly simple and therefore cost-effective construction of the energy store, it has proven to be particularly advantageous if the cell holder has, in particular precisely, two holder parts. Provision is preferably made for the respective holder part to be designed in one piece. In particular, the respective holder part can be formed from a plastic. Preferably, the holder parts are structurally identical or identical, so that the holder parts and thus the cell holder can be produced inexpensively.

It has proven to be particularly advantageous if the holder parts are designed separately from one another and are connected to one another. esp special, the holder parts can be locked together and thus connected to one another. It has been shown to be particularly advantageous if the holder parts are reversibly detachable, ie are connected to one another in a detachable manner without destroying them. The holder parts can thus be detached from one another and then connected to one another again without the holder parts being damaged or destroyed. It is possible for the holder parts to be clipped together, that is to say latched together and thereby connected to one another, in which case the holder parts then do not necessarily have to be connected to one another in a non-destructively detachable manner.

Alternatively or additionally, it is conceivable that the holder parts are connected to one another in an articulated manner. This means in particular that the holder parts are connected to one another in an articulated manner by means of at least or exactly one joint, such that the holder parts are connected to one another so that they can pivot relative to one another about a pivot axis formed in particular by the joint, i.e. are held together. As a result, the electrical energy store can be produced in a particularly time-saving and cost-effective manner. For example, the storage cells are initially arranged in a first of the holder parts while the holder parts are still unfolded. The holder parts are then folded together. In other words, the second holder part is folded onto the first holder part, as a result of which the storage cells can be arranged in the holder and in particular in their cell receptacles in a time-saving and cost-effective manner.

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 store according to the first aspect of the invention. Advantages and advantageous configurations of the first aspect of the invention are to be regarded as advantages and advantageous configurations of the second aspect of the invention and vice versa.

• 1 eine schematische Explosionsansicht einer ersten Ausführungsform eines erfindungsgemäßen, elektrischen Energiespeichers für ein Kraftfahrzeug;
• 2 ausschnittsweise schematische Perspektivansichten von Temperierleitungen des Energiespeichers gemäß der ersten Ausführungsform;
• 3 eine schematische Seitenansicht der ersten Ausführungsform des elektrischen Energiespeichers;
• 4 eine schematische Seitenansicht einer der Temperierleitungen des Energiespeichers gemäß der ersten Ausführungsform;
• 5 eine schematische Perspektivansicht der Temperierleitung gemäß einer zweiten Ausführungsform;
• 6 eine schematische Explosionsansicht eines Zellhalters des Energiespeichers gemäß einer dritten Ausführungsform;
• 7 eine schematische Explosionsansicht des Zellhalters gemäß einer vierten Ausführungsform;
• 8 eine schematische Explosionsansicht des Zellhalters gemäß einer fünften Ausführungsform;
• 9 eine schematische Explosionsansicht des Zellhalters gemäß einer sechsten Ausführungsform;
• 10 eine schematische Explosionsansicht des Zellhalters gemäß einer siebten Ausführungsform;
• 11 eine schematische Explosionsansicht des Zellhalters gemäß einer achten Ausführungsform;
• 12 eine schematische Explosionsansicht des elektrischen Energiespeichers gemäß einer neunten Ausführungsform;
• 13 eine schematische Seitenansicht des Energiespeichers gemäß der neunten Ausführungsform;
• 14 ausschnittsweise eine schematische Perspektivansicht des elektrischen Energiespeichers gemäß einer zehnten Ausführungsform;
• 15 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 16 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 17 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 18 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 19 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 20 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 21 ausschnittsweise eine schematische Draufsicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 22 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Auführungsform;
• 23 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 24 ausschnittsweise eine weitere schematische Draufsicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 25 ausschnittsweise eine weitere schematische Draufsicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 26 ausschnittsweise eine weitere schematische Draufsicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 27 ausschnittsweise eine schematische und geschnittene Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 28 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 29 ausschnittsweise eine weitere schematische und geschnittene Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 30 ausschnittsweise eine schematische und geschnittene Draufsicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 31 ausschnittsweise eine schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform bei einer Herstellung des Energiespeichers;
• 32 ausschnittsweise eine weitere schematische und geschnittene Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 33 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der zehnten Ausführungsform;
• 34 ausschnittsweise eine schematische Perspektivansicht einer Kontaktierungseinrichtung des Energiespeichers gemäß der zehnten Ausführungsform;
• 35 ausschnittsweise eine schematische Perspektivansicht des Zellhalters des Energiespeichers gemäß einer elften Ausführungsform;
• 36 ausschnittsweise eine schematische Perspektivansicht des Zellhalters gemäß einer zwölften Ausführungsform;
• 37 ausschnittsweise eine weitere schematische Perspektivansicht der Kontaktierungseinrichtung des Energiespeichers gemäß der zehnten Ausführungsform;
• 38 ausschnittsweise eine weitere schematische Perspektivansicht der Kontaktierungseinrichtung des Energiespeichers gemäß der zehnten Ausführungsform;
• 39 ausschnittsweise eine schematische und geschnittene Perspektivansicht des Energiespeichers gemäß einer dreizehnten Ausführungsform;
• 40 ausschnittsweise eine weitere schematische und geschnittene Perspektivansicht des Energiespeichers gemäß der dreizehnten Ausführungsform;
• 41 eine schematische Explosionsansicht des Energiespeichers gemäß einer vierzehnten Ausführungsform;
• 42 eine schematische Perspektivansicht von Temperierleitungen des Energiespeichers gemäß der vierzehnten Ausführungsform;
• 43 eine schematische Perspektivansicht eines kammförmigen Elements des Energiespeichers gemäß einer fünfzehnten Ausführungsform, wobei das kammförmige Element ein intumeszentes Material aufweist;
• 44 eine schematische Explosionsansicht des Energiespeichers gemäß einer sechzehnten Ausführungsform;
• 45 eine schematische Explosionsansicht des Energiespeichers gemäß einer siebzehnten Ausführungsform;
• 46 ausschnittsweise eine schematische Perspektivansicht des Energiespeichers gemäß einer achtzehnten Ausführungsform;
• 47 ausschnittweise eine schematische und geschnittene Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 48 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 49 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 50 ausschnittsweise eine schematische und perspektivische Draufsicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 51 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 52 ausschnittsweise eine weitere schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 53 ausschnittsweise eine schematische Draufsicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 54 eine schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform;
• 55 eine weitere schematische Perspektivansicht des Energiespeichers gemäß der achtzehnten Ausführungsform; und
• 56 eine schematische Seitenansicht des Energiespeichers gemäß der achtzehnten Ausführungsform.

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

• 1 a schematic exploded view of a first embodiment of an inventive electrical energy store for a motor vehicle;
• 2 sectional schematic perspective views of temperature control lines of the energy store according to the first embodiment;
• 3 a schematic side view of the first embodiment of the electrical energy storage device;
• 4 a schematic side view of one of the temperature control lines of the energy store according to the first embodiment;
• 5 a schematic perspective view of the temperature control line according to a second embodiment;
• 6 a schematic exploded view of a cell holder of the energy store according to a third embodiment;
• 7 a schematic exploded view of the cell holder according to a fourth embodiment;
• 8th a schematic exploded view of the cell holder according to a fifth embodiment;
• 9 a schematic exploded view of the cell holder according to a sixth embodiment;
• 10 a schematic exploded view of the cell holder according to a seventh embodiment;
• 11 a schematic exploded view of the cell holder according to an eighth embodiment;
• 12 a schematic exploded view of the electrical energy store according to a ninth embodiment;
• 13 a schematic side view of the energy store according to the ninth embodiment;
• 14 a fragmentary schematic perspective view of the electrical energy store according to a tenth embodiment;
• 15 a further schematic perspective view of the energy store according to the tenth embodiment;
• 16 a further schematic perspective view of the energy store according to the tenth embodiment;
• 17 a further schematic perspective view of the energy store according to the tenth embodiment;
• 18 a further schematic perspective view of the energy store according to the tenth embodiment;
• 19 a further schematic perspective view of the energy store according to the tenth embodiment;
• 20 a further schematic perspective view of the energy store according to the tenth embodiment;
• 21 a sectional schematic plan view of the energy store according to the tenth embodiment;
• 22 a further schematic perspective view of the energy store according to the tenth embodiment;
• 23 a detail of a schematic sectional view of the energy store according to the tenth embodiment;
• 24 a further schematic top view of the energy store according to the tenth embodiment;
• 25 a further schematic top view of the energy store according to the tenth embodiment;
• 26 a further schematic top view of the energy store according to the tenth embodiment;
• 27 a detail of a schematic and sectional perspective view of the energy store according to the tenth embodiment;
• 28 a further schematic perspective view of the energy store according to the tenth embodiment;
• 29 a further schematic and sectional perspective view of the energy store according to the tenth embodiment;
• 30 a detail of a schematic and sectional plan view of the energy store according to the tenth embodiment;
• 31 a sectional schematic perspective view of the energy store according to the tenth embodiment during production of the energy store;
• 32 a further schematic and sectional perspective view of the energy store according to the tenth embodiment;
• 33 a further schematic perspective view of the energy store according to the tenth embodiment;
• 34 a detail of a schematic perspective view of a contacting device of the energy store according to the tenth embodiment;
• 35 a sectional schematic perspective view of the cell holder of the energy store according to an eleventh embodiment;
• 36 a fragmentary schematic perspective view of the cell holder according to a twelfth embodiment;
• 37 a further schematic perspective view of the contacting device of the energy store according to the tenth embodiment;
• 38 a further schematic perspective view of the contacting device of the energy store according to the tenth embodiment;
• 39 a detail of a schematic and sectional perspective view of the energy store according to a thirteenth embodiment;
• 40 a further schematic and sectional perspective view of the energy store according to the thirteenth embodiment;
• 41 a schematic exploded view of the energy store according to a fourteenth embodiment;
• 42 a schematic perspective view of temperature control lines of the energy store according to the fourteenth embodiment;
• 43 a schematic perspective view of a comb-shaped element of the energy store according to a fifteenth embodiment, wherein the comb-shaped element has an intumescent material;
• 44 a schematic exploded view of the energy store according to a sixteenth embodiment;
• 45 a schematic exploded view of the energy store according to a seventeenth embodiment;
• 46 a sectional schematic perspective view of the energy store according to an eighteenth embodiment;
• 47 a sectional schematic and sectional perspective view of the energy store according to the eighteenth embodiment;
• 48 a further schematic perspective view of the energy store according to the eighteenth embodiment;
• 49 a further schematic perspective view of the energy store according to the eighteenth embodiment;
• 50 a detail of a schematic and perspective top view of the energy store according to the eighteenth embodiment;
• 51 a further schematic perspective view of the energy store according to the eighteenth embodiment;
• 52 a further schematic perspective view of the energy store according to the eighteenth embodiment;
• 53 a sectional schematic plan view of the energy store according to the eighteenth embodiment;
• 54 a schematic perspective view of the energy store according to the eighteenth embodiment;
• 55 a further schematic perspective view of the energy store according to the eighteenth embodiment; and
• 56 a schematic side view of the energy store according to the eighteenth embodiment.

Elements that are the same or have the same function are provided with the same reference symbols in the figures.

1 shows a first embodiment of an electrical energy store 1 for a motor vehicle in a schematic exploded view. This means that the motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, has the electrical energy storage device 1, also referred to simply as a storage device, in its fully manufactured state. As explained in more detail below, electrical energy or electrical current can be stored, in particular electrochemically, in energy store 1 or by means of energy store 1, so that electrical energy store 1 is preferably a battery, in particular a secondary battery. In particular, the energy store 1 is a high-voltage battery, i.e. a high-voltage store (HV store), whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably several is one hundred volts. The energy store 1 has a plurality of storage cells 2, which in 1 shown first embodiment are formed as round cells and thus the outer circumference side cylindrical. The electrical energy can be stored, in particular electrochemically, in or by means of the storage cells 2, so that the respective storage cell 2 is preferably embodied as a secondary cell. It can be seen that the memory cells 2 are components that are formed separately from one another and are therefore individual cells.

The respective memory cell 2 has a respective, in 1 by a double arrow 3 illustrated direction of longitudinal extent and thus a longitudinal extent running along the direction of longitudinal extent. The respective storage 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 storage cell 2 facing away from one another in the direction of longitudinal extension of the respective storage cell 2 and thereby at respective, in particular free, ends of the respective storage cell 2 are arranged. The respective storage cell 2 has a first electrode connection 4 arranged on or on the end face S1 and a second electrode connection 5 arranged on or on the second end face S2. The electrode connections 4 and 5 are contact areas, which are also referred to as connection areas. As will be explained in detail below, an in 1 contacting device of the energy store 1 that is not shown and is designed separately from the storage cells 2 is electrically contacted or connected to the contact areas, in particular directly, as a result of which the contacting device is electrically connected to the storage cells 2 via the contact areas. As a result, the storage cells 2 are electrically connected to one another via the contacting device, that is to say by means of the contacting device. The electrode connection 4 is or forms, for example, a first electrical pole of the respective storage cell 2. The respective electrode connection 5 is or forms, for example, a second electrical pole of the respective storage cell 2, the first electrical pole having a first electrical polarity and the second electrical pole having one of the first polarity different and in particular the first electrical polarity opposite, second electrical polarity. For example, the first electrical pole is an electrical positive pole, so that the electrode connection 4 is also referred to as the cathode connection or cathode, for example. For example, the second electrical pole is an electrical negative pole, so that the electrode connection 5 is also referred to, for example, as an anode connection or anode. The contacting device is thus electrically connected, in particular directly, to the electrode connections 4 arranged on the respective end faces S1 of the storage cells 2, and the contacting device is electrically connected, in particular directly, to the electrode connections 5 arranged on the respective end sides S2 of the storage cells 2, as a result of which the Memory cells 2 are electrically connected to one another via the contacting device. For example, the contacting device has at least one first contacting element, which is arranged with the first elec Rodenverbindungen 4, in particular each directly, is electrically connected. It is also conceivable that the contacting device has, for example, a second contacting element, which can preferably be galvanically separated from the first contacting element or electrically insulated from the first contacting element. For example, the second contacting element is electrically connected, in particular directly, to the electrode connections 5 arranged on the respective second end faces S2 of the storage cells 2 . This is provided in particular if the storage cells 2 are electrically connected or connected to one another in a parallel circuit. It is also conceivable for the storage cells 2 to be electrically connected or interconnected to one another in a pure circuit by means of the contacting device. The storage cells 2 can provide the electrical energy stored in the storage cells 2 via the electrode connections 4 and 5 . In addition, the storage cells 2 can be supplied with electrical energy or electrical current via their electrode connections 4 and 5, which can be stored in the storage cells 2 as a result.

The electrical energy store 1 also has a cell holder 6 which is designed separately from the storage cells 2 and separately from the contacting device and is also simply referred to as a holder, which has at least or exactly two holder parts 7 and 8 in the first embodiment. The holder part 7 and/or the holder part 8 is preferably designed in one piece. For example, the holder part 7 and/or the holder part 8 is made of a plastic, in particular a heat-conducting plastic. For example, the holder part 7 and/or the holder part 8 is produced by injection molding, in particular by plastic injection molding. In principle, it is conceivable that the holder parts 7 and 8 are identical, i.e. have the same construction, whereby the holder parts 7 and 8 can be produced, for example, by means of the same tool or by means of the same tool, in particular by means of the same or by means of the same injection molding tool. As a result, the cell holder 6 can be manufactured particularly inexpensively. Out of 1 it can be seen that the holder parts 7 and 8 are components which are formed separately from one another and are connected to one another, in particular so that they can be detached without being destroyed. In the first embodiment, the holder parts 7 and 8 are locked together when the energy storage device 1 is in the fully manufactured state and are thus clipped together, that is to say they are connected to one another in a form-fitting manner. The storage cells 2 are supported, in particular directly, on the cell holder 6 and are held on the cell holder 6, as a result of which relative movements between the storage cells 2 and relative movements between the respective storage cell 2 and the cell holder 6 are at least limited, preferably prevented. In addition, the storage cells 2 are held at a respective distance from one another by means of the cell holder 6 , and the storage cells 2 are arranged in one piece by means of the cell holder 6 1 particularly well recognizable pattern held relative to each other. For example, in 1 labeled Z1, first of the memory cells 2 are arranged in a first cell row R1, while in 1 designated Z2, second of the memory cells are arranged in a second cell row R2. This means in particular that the first memory cells Z1 are arranged one after the other along a first straight line, as a result of which the first memory cells Z1 form the first cell row R1, and the second memory cells Z2 are arranged one after the other along a second straight line, whereby the second memory cells Z2 form the second row of cells R2. The straight lines preferably run parallel to one another, so that the cell rows R1 and R2 are arranged next to one another, in particular along an in 1 illustrated by a double arrow 9 and perpendicular to the respective direction of longitudinal extension. In particular, the storage cells 2 have the same or identical design.

The aforementioned contacting device is cut out 15 recognizable and marked there with 10. The following must be observed in particular: When in 1 The first embodiment shown is the electrode connection 4 designed as a cathode, which is electrically connected, in particular directly, to the contacting device 10 in the first embodiment, and is arranged on the first end face S1. The electrode connection 5 designed as an anode or as an anode connection, which in the first embodiment is electrically connected, in particular directly, to the contacting device 10, is in the first embodiment on the second end face S2 facing away from the end face S1 along the longitudinal direction of the respective storage cell 2 arranged so that, for example, a first contacting part of the contacting device 10 in the first embodiment is arranged on or on the respective first end face S1 and, for example, between the respective end face S1 and the holder part 7, and so that, for example, a second contacting part of the contacting device 10 is arranged at the first embodiment is arranged on or on the respective second end face S2 and, for example, between the respective second end face S2 and in the second holder part 8 . It is conceivable that the contacting parts can be galvanically isolated from one another or electrically isolated from one another. The contacting parts can be the aforementioned contactors tion elements of the contacting device 10 be. At this point it should be briefly mentioned that in 15 In the exemplary embodiment shown, the electrode connection 4 is arranged on or on the end face S1, with the electrode connection 5 also being arranged on or on the first end face S1, so that in the case of the in 15 shown embodiment both electrode terminals 4 and 5 are arranged on the end face S1. At the in 1 In the first embodiment shown, for example, the electrode connection 5 is arranged on a bottom of a respective cell housing 11 of the respective storage cell 2 or is formed by the bottom. In other words, the bottom of the cell case 11 is used as the electrode terminal 5 in the first embodiment, for example. At the in 15 shown embodiment is a in 1 with 12 designated collar of the cell housing 11 as the electrode terminal 5 is used. It is preferably provided that the electrode connections 4 and 5 are galvanically separated from one another or electrically insulated from one another in order to avoid short circuits. In the first embodiment, of course, the collar 12 could be used as the electrode terminal 5 instead of the bottom.

Particularly good looking 15 it can be seen that the contacting device 10 is formed separately from the cell holder 6 and separately from the storage cells 2 and is held on the cell holder 6, in particular directly. At the in 15 The embodiment shown is the contacting device 10, in particular held directly on the holder part 8. By mounting the contacting device 10 on the cell holder 6, relative movements between the cell holder 6 and the contacting device 10 and relative movements between the contacting device 10 and the respective storage cell 2 are at least limited, in particular prevented.

In order to be able to implement a particularly advantageous temperature control, i.e. cooling and/or heating of the energy store 1, in particular the storage cells 2, the energy store 1 has at least one and thus, in particular, also separately from the contacting elements or from the contacting parts of the contacting device 10, first temperature control line 13, which is held at least indirectly, in particular directly, on the cell holder. As a result, relative movements between the temperature control lines 13 and the cell holder 6 and relative movements between the temperature control line 13 and the respective storage cell 2 are at least limited, in particular prevented. In the first embodiment, the temperature control line 13 is a solid body and is inherently rigid, ie dimensionally stable. The temperature control line 13 has at least one temperature control channel 14, also referred to simply as a channel, through which a temperature control fluid can flow. The temperature control fluid can thus flow through the temperature control line 13 .

In the first embodiment, the energy store 1 also has a further temperature control line 15, which is formed separately from the contacting device 10, separately from the cell holder 6 and separately from the storage cells 2 and also separately from the first temperature control line 13, to which the following and previous statements relate the temperature control line 13 can be transmitted and vice versa. Thus, the temperature control line 15 is preferably also inherently rigid and designed as a solid body. The temperature control line 15 also has at least one additional temperature control channel 16, also referred to simply as an additional channel, through which the temperature control fluid or another temperature control fluid can flow. In particular, it is conceivable that a circuit through which the tempering fluid can flow is provided. It is conceivable that the temperature control fluid can be divided into a first flow and a second flow, so that the first flow of temperature control fluid can flow through the temperature control line 13 and the second flow of the temperature control fluid can flow through the temperature control line 15 . For example, the temperature control lines 13 and 15 or their temperature control channels 14 and 16 are arranged or connected in parallel to one another in terms of flow, so that the flows of the temperature control fluid can flow through the temperature control lines 13 and 15 in parallel or simultaneously. The temperature control line 13 and/or temperature control line 15 is preferably formed from a particularly heat-conducting material. The material can be a metallic material, for example copper or aluminum. The temperature control line 15 is preferably held, in particular directly, on the cell holder 6 , in particular on the holder part 8 . In the first embodiment, the temperature control line 13 is held, in particular directly, on the holder part 7 .

At the in 1 shown first embodiment, the respective electrode connection 4 to the cell holder 6, in particular to the holder part 7, is at least partially overlapped or covered by the temperature control line 13, ie by a respective partial area of the temperature control line 13. In other words, the respective electrode connection 4 is divided into an in 1 illustrated by an arrow 17 and coinciding with the respective direction of longitudinal extent of the respective storage cell 2 or parallel to the respective direction of longitudinal extent of the respective memory cher cell 2 or parallel to the respective direction of longitudinal extension of the respective storage cell 2, which points away from the respective electrode connection 4 and points towards the cell holder 6, in particular towards the holder part 7, at least partially through the temperature control line 13, i.e. through a respective Section of the temperature control line 13 overlaps or covers. Out of 1 It is particularly easy to see that the holder part 7 has a first cover element 18, from which an in 1 In the second direction illustrated by an arrow 20, respective first column parts 19 protrude. The arrows 17 and 19 show that the second direction is opposite to the first direction, with the second direction coinciding with the respective longitudinal direction of the respective storage cell 2 or running parallel to the respective longitudinal direction of the respective storage cell 2 . The respective electrode connection 4 is thus overlapped or covered towards the cover element 18, i.e. in the first direction pointing away from the respective electrode connection 4 and towards the cover element 18, by the temperature control line 13, i.e. by a respective partial area of the temperature control line 13, so that the temperature control line 13 or the respective partial area of the temperature control line 13 is arranged along the first direction between at least part of the respective electrode connection 4 and the cover element 18 (cell holder 6 or holder part 7).

The holder part 8 has a second cover element 21 from which respective second column parts 22 protrude in or along the first direction illustrated by the arrow 17 . The column parts 19 are spaced from each other and the column parts 22 are spaced from each other. Provision is also made for the respective electrode connection 5 to the cell holder 6, in particular to the holder part 8 and very particularly to the second cover element 21, to at least partially overlap through the temperature control line 15, i.e. through a respective, further partial area of the temperature control line 15 or is covered. In other words, the respective second electrode connection 5 points in the direction illustrated by the arrow 20, opposite the first direction, pointing away from the respective electrode connection 5 and towards the cell holder 6, in particular towards the holder part 8 and very particularly towards the second cover element 21 , Second direction at least partially overlapped or covered by the temperature control line 15, in particular by a respective portion of the temperature control line 15. As a result, the electrode connections 4 can be particularly advantageously temperature-controlled, ie cooled and/or heated, via the temperature-control line 13 by means of the temperature-control fluid flowing through the temperature-control line 13, ie by means of the first flow of the temperature-control fluid. In addition, the electrode connections 5 can be temperature-controlled, i.e. cooled and/or heated, via the temperature-control line 15 particularly advantageously by means of the temperature-control fluid flowing through the temperature-control line 15, i.e. for example by means of the second flow of temperature-control fluid flowing through the temperature-control line 15, so that the storage cells 2 via their Electrode terminals 4 and 5 can be effectively and efficiently temperature controlled. In particular, the respective partial area of the respective temperature control line 13 or 15 is arranged between at least a respective part of the respective electrode connection 4 or 5 and a respective wall area of the cell holder 6, in particular of the holder part 7 or 8 and very particularly of the cover element 18 or 21, so that a particularly advantageous heat exchange between the respective electrode connection 4 or 5 and the temperature control fluid flowing through the respective temperature control line 13 or 15 can be ensured.

Furthermore, it is particularly good 1 recognizable that the respective temperature control line 13 or 15 extends in a meandering manner, in particular from cell row to cell row. The respective temperature control line 13 or 15 has at least one respective meander 23 or 24, with the respective meander 23 or 24 being separated by a respective first meander arm 25 or 26, by a respective second meander arm 27 or 28 and by a respective, also as Meander bending designated meander head 29 or 30 is formed. The meander arms 25 and 27 or 26 and 28 are fluidically and mechanically connected to one another via the respective meander head 29 or 30 . In particular, it is conceivable that the respective meander 23 or 24 is formed in one piece. In the first embodiment, the electrode connections 4 of the first storage cells Z1 are towards the holder part 8, in particular towards the first cover element 18, in each case at least partially overlapped by the first meandering arm 25, and the electrode connections 4 of the second storage cells Z2 are towards the holder part 7, in particular towards the cover element 18, in each case at least partially overlapped or covered by the meander arm 27. The electrode connections 5 of the cell row R1 or the first storage cells Z2 are at least partially overlapped towards the holder part 8, in particular towards the cover element 21, by the meandering arm 26, and the electrode connections 5 of the second storage cells Z2 are towards the holder part 8, in particular towards the second cover element 21, towards each at least partially as overlapped by the meander arm 28. As a result, a particularly advantageous heat exchange can be realized between the respective electrode connection 4 or 5 and the temperature control fluid via the respective temperature control line 13 or 15 .

The respective first column part 19 has at least or exactly one first respective connecting element 31 . Accordingly, the respective second column part 22 has a respective second connecting element 32 corresponding to the respective first connecting element 31 . In the completely manufactured state of the energy store 1 , the holder parts 7 and 8 are connected to one another by means of the connecting elements 31 and 32 , in particular in such a way that the connecting elements 31 are connected to the corresponding connecting elements 32 . In the first embodiment, the connecting elements 31 and 32 are designed as latching elements, so that when the energy store 1 is completely manufactured, the respective first connecting element 31 latches with the respective, second, corresponding connecting element 32 and is therefore positively connected. This is particularly good looking 3 recognizable.

The respective holder part 7 or 8 can be formed from precisely one material, in particular from precisely one plastic, with precisely one material preferably being thermally conductive. It is also conceivable for the holder part 7 and/or the holder part 8 to have a base body made in particular of a first material, which is provided with a layer, for example, made of a second material that is different from the first material. The layer can be applied directly to the base body. For example, the layer is a thermally conductive layer, in particular a thermally conductive plastic. The base body can be a first component, and the layer can be formed by a second component, which is formed separately from the first component and is arranged on the first component. For example, the respective component is a solid body and/or dimensionally stable, ie inherently rigid, when considered on its own. It is also conceivable that the base body is coated with the layer, in particular in such a way that the layer or the second material is or is applied to the base body in a liquid state. A particularly advantageous temperature control of the storage cells 2 can thereby be ensured. The layer is preferably a thermally conductive layer which is or will be co-injected with the base body, for example, or the layer and the base body are formed from components that are formed separately from one another.

2 shows the temperature control lines 13 and 15 in a schematic perspective view. Particularly good looking 2 it can be seen that the respective temperature control line 13 or 15 has exactly two broad sides B1 and B2 facing away from one another, which face away from one another along the respective longitudinal extension direction of the respective storage cell 2 illustrated by the double arrow 3 . While the broad side B1 of the temperature control line 13 faces the holder part 7, in particular the cover element 18, the broad side B2 of the temperature control line 13 faces the storage cells 2 and at the same time the electrode connections 4, in particular in such a way that the electrode connections 4 in each case at least partially pass through the broad side B2 and are preferably also overlapped by the broad side B1 of the temperature control line 13 . The broad side B1 of the temperature control line 15 faces the electrode connections 5, and the broad side B2 of the temperature control line 15 faces the holder part 8, in particular the second cover element 21, it being preferably provided that the electrode connections 5 pass through the broad side B1 of the temperature control line 15 and are preferably also at least partially overlapped or covered by the broad side B2 of the temperature control line 15 . It is preferably provided that the broad side B1 touches the holder part 7, in particular the first cover element 18, directly. Alternatively or additionally, it is preferably provided that the broad side B2 of the temperature control line 15 touches the holder part 8, in particular the second cover element 21, directly. The respective temperature control line 13 or 15 has at least or exactly one inlet E1 or E2, via which - as in 2 is illustrated by arrows - the tempering fluid in the respective temperature control line 13 or 15, that is, in the respective channel can be introduced. In addition, the respective temperature control line 13 or 15 has at least or precisely one respective outlet A1 or A2, via which the temperature control fluid can be discharged from the respective temperature control line 13 or 15, ie from the respective channel. The respective inlet E1 or E2 is also referred to as the inlet, and the respective outlet A1 or A2 is also referred to as the outlet. In particular, the in 2 arrows shown a respective direction of flow, along which the temperature control fluid flows through the respective temperature control line 13 or 15. It can be seen that the temperature control fluid flows through the temperature control line 13 in a first flow direction, and that the temperature control fluid flows through the temperature control line 15 in a second flow direction, the second flow direction of flow is opposite to the first direction of flow or vice versa. This means in particular the following: The cell holder 6 in the in 1 Storage cells 2 held in recognizable patterns form a cell stack, also referred to as a battery pack. The inlet E1 is arranged on a first side SE1 of the cell stack and/or the temperature control line 13 and 15, and the outlet A1 of the temperature control line 13 is arranged on a second side SE2 of the cell stack and/or the temperature control lines 13 and 15. In particular, the sides SE1 and SE2 face each other along the direction illustrated by the double-headed arrow 9 . In order to realize the opposite flow direction, the inlet E2 of the temperature control line 15 is not on the side SE1 but on the opposite side SE2 and the outlet A2 of the temperature control line 15 is not on the side SE2 but on the opposite side SE1. Thus, while the temperature control fluid flows into the temperature control line 13 on the SE1 side and out of the temperature control line 13 on the SE2 side, the temperature control fluid flows into the temperature control line 15 on the SE2 side and out of the temperature control line 15 on the SE1 side. As a result, a particularly advantageous and in particular at least essentially uniform temperature control of the storage cells 2 can be implemented. It can be provided that the respective column part 19 or 22 is hollow on the inside. Alternatively or additionally, it is conceivable for ribs to protrude from the respective column part 19 or 22, in particular towards the respective storage cell 2, which ribs are preferably spaced apart from one another.

Especially out 3 It can be seen that in the fully manufactured state of the energy store 1 the respective first column part 19 and the respective corresponding second column part 22 connected to the respective first column part 19 form a respective column element 33, also simply referred to as a column. The column elements 33 are preferably spaced apart from one another. Furthermore is off 3 recognizable that, for example, respective length areas, in particular the respective meander heads 29 and 30, protrude beyond the respective holder part 7 or 8 and thus protrude from the respective holder part 7 or 8. It is conceivable that the respective longitudinal area, ie the respective meander head 29 or 30, is bent towards the column elements 33, in particular by at least 70 degrees, preferably by at least 80 degrees and very preferably by at least or exactly 90 degrees.

1 until 4 illustrate the first embodiment of the energy store 1. In particular, in 4 As can be seen from the temperature control line 13, for example, that the respective meander head 29 protrudes at an angle from the respective meander arms 25 and 27 or is bent or bent, in particular in such a way that while the meander arms 25 and 27 extend in an imaginary plane EB, the respective meander head 29 protrudes from the plane EB, in particular along a direction that runs perpendicular to the plane and, for example, runs parallel to the respective direction of longitudinal extent or coincides with the respective direction of longitudinal extent. In principle, it is conceivable that the respective broad side B1 or B2 has an at least essentially uniform or constant width.

5 shows a schematic perspective view of the temperature control line 13 or 15 according to a second embodiment. In the first embodiment, the respective temperature control line 13 or 15 has exactly one flattening step or exactly one degree of flattening, so that the respective broad side B1 or B2 has an at least essentially constant width. At the in 5 However, in the second embodiment shown, the temperature control line 13 and/or 15 can have at least or exactly two flattening stages, so that in the first length areas of the temperature control line 13 or 15 the respective broad side B1 or B2 has a first width and in the second length areas of the temperature control line 13 or 15 the respective broad side B1 or B2 has a second width that is greater than the first width, the first length regions and the second length regions being arranged alternately one after the other. In particular, the respective broad side B1 or B2 can be wider in the area of the respective electrode connection 4 or 5 than in an adjoining area, so that, for example, the respective second partial area of the temperature control line 13 or 15 is arranged in an overlap with the respective electrode connection 4 or 5, and where For example, the respective first partial area of the respective temperature control line 13 or 15 is arranged without overlapping with the respective electrode connection 4 or 5 .

In particular, it is conceivable that the respective temperature control line or 15 is produced in the following manner: First, a line part is provided which is, for example, circular on the outer circumference, the line part preferably also being circular on the inner circumference, so that the respective channel initially has a circular shape through which the temperature control fluid can flow Has flow cross section. In order to produce the temperature control line 13 or 15 from the line part, the line part ovalized, so to speak, i.e. flattened or compressed. As a result, the line part or the temperature control line 13 or 15 is no longer circular on the outside and inside circumference, but oval or stadium-shaped, so that the respective channel is, for example, oval or stadium-shaped. In areas in which the line part is not flattened, i.e. not compressed, the line part or the temperature control line 13 or 15 remains circular on the inside and outside circumference, for example, which is particularly advantageous in the areas of the meander heads 29 or 30. In other words, the The respective meander head 29 or 30 must be circular on the outside and inside circumference, so that the respective meander head 29 or 30 can be bent, in particular relative to the meander arms 25 and 27 or 26 and 28, without the respective channel being excessively and undesirably narrowed. As a result, excessive pressure loss of the tempering fluid can be avoided.

6 shows a schematic exploded view of the cell holder 6 for a third embodiment of the energy store 1, and 7 shows a schematic exploded view of the cell holder 6 for a fourth embodiment of the energy store 1. 5 shows a schematic exploded view of the cell holder 6 for a fifth embodiment of the energy store 1, and 9 1 shows a schematic exploded view of the cell holder 6 for a sixth embodiment of the energy store 1. Furthermore, FIG 10 in a schematic exploded view the cell holder 6 for a seventh embodiment of the energy store 1, and 11 shows a schematic exploded view of the cell holder 6 for an eighth embodiment of the energy store 1. 12 shows a ninth embodiment of the energy store 1 in a schematic exploded view 12 it can be seen that the respective storage cell 2 along its respective circumferential direction running around its respective direction of longitudinal extension, which in 9 illustrated by an arrow 34, is surrounded by the respective column elements 33, in particular in such a way that the respective column elements 33 are spaced apart from one another in the circumferential direction of the respective storage cell 2 and are arranged in succession and preferably evenly distributed. The respective storage cell 2, in particular its respective outer peripheral lateral surface 35 arranged between the end faces S1 and S2 along its respective longitudinal extension direction, is supported directly on the column elements 33, which surround the respective storage cell 2 along its respective circumferential direction. Thus, for example, the respective storage cell 2 can also be temperature-controlled via its respective outer peripheral lateral surface 35, so that not only an advantageous terminal-side temperature control of the storage cell 2 can be implemented via its respective electrode connections 4 and 5, but also a particularly advantageous lateral temperature control of the respective storage cell 2 can be implemented via the respective lateral surface 35 on the outer circumference. Energy store 1 has at least one additional temperature control line 36, which is configured separately from temperature control lines 13 and 14, separately from contacting device 10, separately from cell holder 6, and separately from storage cells 2, which is preferably inherently rigid and/or configured as a solid body. In particular, it is conceivable that the temperature control line 36 is formed from a material which is preferably thermally conductive and/or a metallic material such as aluminum or copper. The direction illustrated by the double arrow 9 runs perpendicularly to the respective direction of longitudinal extension illustrated by the double arrow 3 and perpendicularly to a further direction in 12 direction illustrated by a double arrow 37 , which runs perpendicularly to the direction illustrated by the double arrow 9 and perpendicularly to the direction of longitudinal extent illustrated by the double arrow 3 . The double arrow 3 also illustrates an assembly direction along which the holder parts 7 and 8 of the cell holder 6 are assembled. The respective temperature control line 13 or 15 runs meandering in a respective first plane, which is spanned in the direction illustrated by the double arrow 9 and in the further direction illustrated by the double arrow 37 . The temperature control line 36 also runs in a meandering manner in the plane, the direction illustrated by the double arrow 9 being spanned by the further direction illustrated by the double arrow 37 . The temperature control line 36 thus has meanders 38 , the respective meander 38 also being formed by, in particular precisely, two meander arms 39 and 40 and a meander head 41 . The respective meander arm 39 or 40 is a line section of the temperature control line 36. The further plane spanned by the direction illustrated by the double arrow 9 and by the further direction illustrated by the double arrow 37 is also referred to as the first meander plane. The respective line section, ie the respective meandering arm 39 or 40 of the temperature control line 36 runs in a meandering manner in a second meandering plane, which runs perpendicular to the first meandering plane. The second meander plane is spanned by the direction of longitudinal extension illustrated by the double arrow 3 and by the further direction illustrated by the double arrow 37 . Thus, while the meanders 38 meander in the first meander plane, the respective line section of the temperature control line 36 has at least one or several additional meanders 42 in the respective second meander plane, with the respective meander 42 also having at least or exactly two meander arms and through a meander head is formed. It can be seen that the meander arms and the meander head of the respective meander 42 are respective length areas of the temperature control line 36 . The temperature control line 36 and thus its meanders 38 and 42 and thus its longitudinal areas can be flowed through by the previously mentioned temperature control fluid or by another temperature control fluid. In particular, it is conceivable that the temperature control fluid flowing through the circuit is divided into a third stream or a third flow, with the third stream or the third flow flowing through the temperature control line 36 . The respective meanders 42 of the temperature control line 36 are accommodated in the respective column elements 33 and thus in the column parts 19 and/or the column parts 22 . At the in 12 In the ninth embodiment shown, the respective column element 33, which is formed by the respective column parts 19 and 21 in the assembled and thus assembled state of the cell holder 6 or the holder parts 7 and 8, is a column that is in particular continuously hollow, in which the respective meander 42 of the temperature control line 36 runs or is recorded. Since preferably the outer peripheral lateral surface 35 of the respective storage cell 2 bears directly against the respective column elements 33 surrounding the respective outer peripheral lateral surface 35, a particularly advantageous, lateral temperature control of the respective storage cell 2 can be realized. Out of 12 It is also particularly easy to see that the energy store 1 is manufactured, for example, or that the meanders 42 are arranged in the column elements 33 in such a way that the temperature control line 36 is moved in a translatory manner relative to the holder parts 7 and 8, in particular along the respective direction of longitudinal extension, such that the respective meanders 42 are inserted into the respective column elements 33 . It is preferably provided that the respective column element 33 is hollow throughout, in particular on the inside, as a result of which the meanders 42 of the temperature control line 36 can be arranged in the column elements 33 in a particularly simple manner. A meander of the temperature control line 36 does not have to be arranged in each column element 33 . It is conceivable that the meanders 42 of the temperature control line 36 are arranged at least in some of the column elements 33 . As a result, a particularly advantageous lateral temperature control of the storage cells 2 can be achieved.

13 shows the cell holder 6 according to the ninth embodiment in a schematic side view. Particularly good looking 13 It can be seen how the holder parts 7 and 8 are connected to one another by means of the connecting elements 31 and 32 provided on the column parts 19 and 21, in particular in such a way that the connecting elements 31 and 32 are locked together so that the holder parts 7 and 8 are locked together.

14 until 34 illustrate a tenth embodiment of the energy store 1. 14 shows a part of a schematic perspective view, for example, of the holder part 8 and its column parts 22. The temperature control line 13, which runs meandering in the first meandering plane, is supported via its second broad side B2 directly on the holder part 8, in particular on the cover element 21, such that the broad side B2 touches the cover member 21 directly.

As already described above, it is provided in the tenth embodiment that the collar 12, also referred to as collar, of the respective storage cell 2, in particular of the respective cell housing 11, is used as the electrode connection 5. The collar 12 runs in the circumferential direction of the respective storage cell 2 in particular completely circumferentially or without interruption around the electrode connection 4, that is to say around the connection region which is used as the electrode connection 4. Thus, in the tenth embodiment, both the electrode terminals 4 and 5 are arranged on the same end face S1. As a result, the contacting device 10 can make electrical contact with the respective storage cell 2 in the following manner: The aforementioned first contacting element of the contacting device 10 is shown in detail in FIG 15 recognizable and marked there with 43. The contacting element 43 makes electrical contact, in particular directly, with the respective electrode connection 4 , that is to say is connected, the contacting element 43 being arranged between the respective electrode connection 5 and the cover element 21 of the holder part 8 . Thus, the contacting element 43 is arranged on the end face S1 and between the end face S1 and the cover element 21 . The aforementioned, second contacting element of the contacting device 10 is in 15 partially recognizable and labeled 44. The contacting element 44 is electrically contacted, in particular directly, with the respective, second electrode connection 5, ie connected, so that both contacting elements 43 and 44 are arranged on the end face S1. In this case, the contacting element 44 between the Cover element 21 and the respective electrode terminal 5 arranged.

Out of 16 it can be seen that the cell holder 6 , in particular the holder part 8 and very particularly the cover element 21 , has at least or exactly one through-opening 45 for each electrode connection 4 and at least or exactly one through-opening 46 for each electrode connection 5 . At the in 16 shown embodiment, the respective through-opening 45 is at least substantially circular. The respective through-opening 46 is designed, for example, as an elongated hole or else in the shape of an arc. The contacting element 43 can be connected, in particular welded, to the electrode connection 4 via the through-opening 45, for example in a materially bonded manner, and thereby be electrically connected. For this purpose, for example, a welding element is brought into, in particular direct, contact with the contacting element 43 via the through-opening 45, so that the contacting element 43 is welded to the respective electrode connection 4 by means of the welding element and is thereby electrically connected. The same can be done via the through-opening 46 . For example, the contacting element 44 is materially connected, in particular welded, to the respective electrode connection 5, i.e. to the respective collar 12, via the through-opening 46, as a result of which the contacting element 44 is electrically connected, in particular directly, to the collar 12 or to the electrode connection 5. The respective electrical contact is particularly good 17 and 18 recognizable. Especially in combination with 19 it can be seen that the electrode connection 4 is an at least essentially circular area which is completely surrounded in the circumferential direction of the respective storage cell 2 by the collar 12 which is used as the electrode connection 5 in the tenth embodiment. Also particularly good looking 17 The electrical contacting of the contacting element 44 with the collar 12, which is used as the electrode connection 5, can be seen. The contacting elements 43 and 44 are preferably electrically isolated from one another, and are therefore electrically isolated from one another. The electrode connections 4 and 5 can be arranged in a common plane in the longitudinal direction of the respective storage cell 2, or it is conceivable that, for example, the electrode connection 4 is arranged in a first connection level and the electrode connection 5 in a second connection level, with the connection levels running parallel to one another and the connection planes are preferably spaced apart from one another, in particular along the longitudinal direction of the respective storage cell 2. It is preferably provided that the respective connection plane runs perpendicular to the respective longitudinal direction of the respective storage cell 2. A recess 47 is arranged along a spacing direction running in the respective connection plane between the electrode connection 4 and the collar 12 or the electrode connection 5, which runs completely and thus without interruption around the electrode connection 4 in the circumferential direction of the respective storage cell 2. Thus, for example, the collar 12 (electrode connection 5) runs in the circumferential direction of the respective storage cell 2 all the way around the cutout 47. For example, the recess 47 is set back in relation to the respective connection plane. Particularly good looking 20 the passage openings 45 and 46 can be seen.

21 shows the energy store 1 according to the tenth specific embodiment in a schematic top view. How particularly good looking 21 As can be seen, the storage cells 2 are held at a respective distance from one another by means of the column elements 33, in particular in pairs. Also is particularly good looking 21 recognizable that the respective lateral surface 35 on the outer peripheral side of the respective storage cell 2 is in direct contact with the column elements 33 which surround the respective storage cell 2 in the circumferential direction of the respective storage cell 2 .

How out 22 As can be seen, the contacting element 43 has first openings 48 which are designed as through-openings. The contacting element 44 has second openings 49 which are designed as through-openings. The cell holder 6, in particular the holder part 8 and in particular the cover element 21 has fastening elements 50, which according to 22 are designed as latching elements, in particular as latching hooks. The contacting elements 43 and 44 are fastened to the cell holder 6 , in particular to the holder part 8 , via their openings 48 and 49 by means of the fastening elements 50 . For this purpose, the fastening elements 50 engage in the openings 48, 49, in particular in such a way that the fastening elements 50 penetrate the openings 48, 49. In particular, the fastening elements 50 engage behind the respective wall regions of the contacting elements 43 and 44 that delimit the respective openings 48, 49, in particular directly, so that the contacting elements 43 and 44 are latched to the cell holder 6, in particular to the holder part 8, by means of the fastening elements 50. As a result, the contacting elements 43 and 44 are clipped onto the holder part 8 and are thus held on the holder part 8 .

Particularly good looking 17 it can be seen that the contacting element 43 has a connecting region 51 which has an at least essentially flat extension. The contacting element 43 also has a connection finger 52 which protrudes obliquely or, in the present case, perpendicularly from the connection area 51 , in particular in a respective direction pointing away from the respective electrode connection 4 . The connection finger 52 is also referred to as a pin and is electrically connected to the connection area 51 , in particular in such a way that the connection finger 52 is formed in one piece with the connection area 51 . It is particularly good 23 It can be seen that the cell holder 6, in particular the holder part 8 and very particularly the cover element 21, has a respective through-opening 53 which corresponds to the respective connecting finger 52 and through which the respective connecting finger 52 passes. As a result, the contacting element 43 runs from a side of the holder part 8 facing the respective storage cell 2 to a side of the holder part 8 remote from the respective storage cell 2, with the respective connecting finger 52 connecting the holder part 8, in particular the cover element 21, on the side remote from the respective storage cell 2 of the holder part 8 protrudes or protrudes from the cover element 21 .

Out of 22 it can be seen that the contacting element 43 runs between regions BE1 and BE2 of the contacting element 44, in particular in such a way that a region BE3 of the contacting element 43 extends between the regions BE1 and BE2. Since the collar 12 is used as the electrode connection 5 in the tenth embodiment, which is therefore uninterrupted in the circumferential direction of the respective storage cell 2 and is therefore designed as a ring, the electrode connection 5 extends from the area BE1 to the area BE2 or vice versa, so that the electrode connection 5 extends beyond the area BE3 of the contacting element 43 . In order to avoid a short circuit of the electrode connections 4 and 5, is - as from 24 can be seen - an insulating element 54a is provided. The insulation element 54a is arranged at least between the area BE3 and the electrode connection 5, in particular along the respective longitudinal extension direction of the respective storage cell 2. The area BE3 extends on a side of the insulation element 54a facing away from the electrode connection 5 between the areas BE1 and BE2 and thus below through the insulation element 54a, so that the electrode connection 5 does not electrically contact the region BE3 or the contacting element 43. The respective electrode connection 5 is thus electrically insulated or galvanically separated from the contacting element 43 by means of the insulation element 54a. The insulation elements 54a, by means of which, for example, the electrode connections 5 of the first storage cells Z1 or the respective cell row are electrically isolated from the respective contacting element 43 or electrically isolated from the respective contacting element 43, are formed in one piece with one another, as a result of which the insulating elements 54a are simple, time- and can be installed inexpensively.

Particularly good looking 24 and 25 it can be seen that the contacting element 43 has, in particular for each electrode connection 4, a first contacting area 54 and a second contacting area 55. In a normal operating state of the energy store 1, the contacting regions 54 and 55 are electrically connected to one another, in particular formed in one piece with one another. Out of 25 It can be seen that the contacting areas 54 and 55 are electrically connected to one another via a narrow web 56, the web 56 being formed in one piece with the contacting areas 54 and 55, for example. It is preferably provided that the respective electrode terminal 4 by means of a 26 recognizable insulation element 57 is galvanically separated or electrically isolated from the contacting area 54, while the respective electrode connection 4 is electrically contacted or connected to the respective contacting area 55, in particular directly. At the in 26 The exemplary embodiment shown is the respective electrode connection 5 galvanically separated or electrically insulated from the contacting element 44 or from the area BE3 by means of the insulation element 57, so that, for example, according to FIG 26 the particular 57 according to the function of the insulating element 54a 24 takes over. It is preferably provided that the insulation elements 57 are formed in one piece with one another. In particular, the respective insulation element 54a or 57 is designed as a non-conductor or as an insulator, the electrical conductivity of which is preferably less than 10 ^-8 S*cn ^-1 .

If, for example, it is now determined, in particular by means of an electronic computing device of the energy store 1, that one of the storage cells 2 has a malfunction, is defective or is no longer fully functional for another reason, the electronic computing device can, for example, cause the one storage cell to over the contacting element 44 and thus via the contacting area 55 and the web 56 with such a high electrical cal current is charged or discharged so that the web 56 melts or burns out, which means that the electrical connection between the contacting areas 54 and 55 is eliminated. As a result, one memory cell, since its electrode connection 4 is electrically isolated from contacting region 54 by insulating element 57, is at least electrically isolated from contacting element 44 and thus from the other remaining memory cells, in particular while the other remaining memory cells are electrically isolated via contacting element 44 stay connected.

27 shows the tenth embodiment of the energy store 1 in part in a schematic and sectional perspective view. It can be seen that the holder part 8, in particular the cover element 21, has a recess 58, the bottom 59 of which projects away from the contacting element 43 and is set back away from the contacting element 43, in particular in relation to the wall regions of the cover element 21 adjoining the recess 58. It is preferably provided that the temperature control line 13, in particular the meandering arms 25 and 27, run or are accommodated in the recesses 58 of the cover element 21. It is provided in particular that between the temperature control line 13 or 15 and the contacting element 43 or 44, i.e. the contacting device 10, an in 27 recognizable insulation layer 60 is arranged, by means of which the temperature control line 13 or 15 is electrically insulated or galvanically isolated from the contacting device 10. This insulation layer 60 is present separately from the temperature control line 13 or 15, separately from the contacting device 10, separately from the cell holder 6 and separately from the storage cells 2 and also preferably separately from the further temperature control line 36 . In addition, it is provided here that the insulation layer 60 is formed by a solid body that is formed separately from the cell holder 6 . The insulating layer 60 can be formed from paper, for example. It is particularly conceivable that the insulation layer 60 is directly on the temperature control line 13 or 15, in particular on the broad side B2 or B1 facing the electrode connections 4 and 5, and directly on the contacting device 10, in this case on the contacting element 43 and also on the contacting element 44, so that heat between the respective electrode connection 4 or 5 and the temperature control fluid flowing through the temperature control line 13 or 15 can be ensured particularly advantageously via the insulation layer 60 .

How out 27 can be seen again, the contacting element 43 has the openings 48, which are designed as through-openings. The contacting element 44 has the second openings 49, which are designed as through-openings. The cell holder 6, in particular the holder part 8 and in particular the cover element 21, has the fastening elements 50, which according to also according to FIG 27 (as per 22 ) are designed as latching elements, in particular as latching hooks. The contacting elements 43 and 44 are fastened to the cell holder 6 , in particular to the holder part 8 , via their openings 48 and 49 by means of the fastening elements 50 . For this purpose, the fastening elements 50 engage in the openings 48, 49, in particular in such a way that the fastening elements 50 penetrate the openings 48, 49. In particular, the fastening elements 50 engage behind the respective wall regions of the contacting elements 43 and 44 that delimit the respective openings 48, 49, in particular directly, so that the contacting elements 43 and 44 are latched to the cell holder 6, in particular to the holder part 8, by means of the fastening elements 50. As a result, the contacting elements 43 and 44 are clipped onto the holder part 8 and are thus held on the holder part 8 . The fastening elements 50 designed as latching elements, in particular latching hooks, have sufficient elasticity for assembly so that when they are inserted into the openings 48, 49, they are initially elastically deformed and then spring back and engage behind the respective wall areas, as a result of which the contacting elements 43, 44 are clipped onto the holder part 8.

Particularly good looking 28 The connecting elements 31 and 32 can be seen, by means of which the column parts 19 and 22 are connected, in particular positively, and thereby, for example, latched, whereby the respective column element 33 is formed by the respective column parts 19 and 22 .

29 shows some of the column elements 33 in a schematic and perspective sectional view. Particularly good looking 29 Two of the meanders 42 of the temperature control line 36 can be seen 29 the respective meandering arms of the respective meanders 42 of the temperature control line 36 can be seen, the respective meandering arms of the respective meander 42 of the temperature control line 36 being arranged or running in the respective, in particular continuously hollow, column element 33 . It is preferably provided that at least one of the meander arms, in particular both meander arms, of the respective meander 42 touches the respective column element 33 directly. This allows the respective column element 33 and the respective Mäan With the arms of the respective meander 42, a particularly advantageous heat exchange can take place between the respective storage cell 2 and the temperature control fluid flowing through the temperature control line 36.

Besides, it's off 29 recognizable that the energy store 1 preferably has an intumescent material 61, wherein in 29 respective parts 62 of the intumescent material 61 can be seen. The intumescent material 61 is a material whose volume increases greatly under the effect of heat, ie when the material 61 is heated, in particular to at least 27 times its initial value. In the tenth embodiment, the respective parts 62 of the intumescent material 61 are arranged in the respective hollow pillar members 33 . It is particularly conceivable that a part 62 of the material 61 is arranged in the respective column element 33 . In particular, it is conceivable that the respective part 62 fills gaps between the respective meander arm and the respective column element 33 at least partially, in particular at least predominantly or completely, so that the intumescent material 61 in the respective column element 33 is particularly advantageous for heat between the temperature control line 36 through-flowing tempering fluid and the respective storage cell 2 can be exchanged. As a result, a particularly advantageous lateral temperature control of the respective storage cell 2 can be implemented.

30 shows the energy store 1 according to the tenth specific embodiment in a schematic and sectional plan view. It is particularly good 3 the arrangement of the parts 62 of the intumescent material 61 in the column elements 33 can be seen. In particular, the intumescent material 61 can be used to fill cavities between the storage cells 2 and/or cavities between the respective storage cell 2 and the cell holder 6. It is conceivable that the cell holder 6 is provided directly with the material 61, in particular coated, or the material 61 is arranged in capsules, also known as ampoules, or forms ampoules or capsules which are attached at least indirectly, in particular directly, to the cell holder 6 can be arranged. Even a coating of specific components with the intumescent material 61 can be advantageous, for example in order to produce the energy store 1 in a time-saving and cost-effective manner. In particular from 29 and 30 it can be seen that respective walls of the cell holder 6, in particular of the column elements 33, can be locally tapered in order to be able to realize an advantageous heat exchange. In this case, for example, the lateral surfaces 35 are in direct contact with the locally tapered walls of the cell holder 6 . In addition, a thermal melting point can thereby be created at which the wall melts, so that the intumescent material 61 can emerge from the respective column element 33 . If, for example, a thermal event occurs in at least one of the storage cells 2, as a result of which one storage cell 2 is severely heated, the material 61, for example, is severely heated as a result. As a result of the strong heating of the material 61, the material 61 swells or the material 61 swells, in other words the volume of the material 61 is greatly increased, which separates one storage cell 2 from the other storage cells where no thermal event has occurred is thermally shielded. This allows the material 61 to function as fire or thermal insulation. If the material 61 is arranged in ampoules, capsules or other elements that can be assembled separately, then these elements could be reused or easily separated, in particular after the material 61 has expanded. The element can have thin-walled areas that are provided in a targeted manner, hence an at least particularly thin wall area, which can melt as a result of heating, in order to thereby release the material 61 . If ampoules, cartridges, capsules or other elements are used, it is conceivable to fill these elements or ampoules with an extinguishing agent such as CO ₂ in order to be able to extinguish any fire in the energy store 1 using the extinguishing agent. In particular, it is possible to glue the storage cells 2 using the intumescent material 61 and/or the holder parts 7 and 8 can be glued to one another using the intumescent material 61 .

In particular related to 29 The following can be conceivable: if, for example, at least one of the storage cells experiences a thermal event as a result of which one storage cell is heated to a great extent, then, for example, one of the column elements 33 surrounding the storage cell is heated, in particular to such an extent that at least a landing area of the one column element 33 melts in such a way that at least one through-opening is formed in the wall region of one column element 33 . In addition, the intumescent material 61 accommodated in the one column element 33 or the part 62 of the material 61 accommodated in the one column element 33 is strongly heated, so that at least the part 62 of the material 61 accommodated in the one column element 33 increases greatly in terms of its volume. therefore greatly expanded. The part 62 can thus emerge from the one column element 33 via the through-opening formed in the wall region of the one column element 33 and thereby the one storage cell in which the thermal Event has come from the rest of the other storage cells 2 effectively and efficiently thermally shield. This can prevent the thermal event from spreading to the other memory cells 2, so that thermal propagation can be avoided.

In 31 the welding element, also referred to as a welding device, by means of which, for example, the contacting element 44 is materially connected to the respective electrode connection 5 via the respective through-opening 46, in particular welded, and thereby also electrically connected, is designated 63. Particularly good looking 31 it can be seen that the respective contacting element 43 or 44 can be welded to the respective associated electrode connection 4 or 5 from a single side via the respective through-opening 45 or 46 and can thus be electrically connected, so that access to the contacting element 43 or 44 from one side is sufficient, in order to weld the contacting element 43 or 44 to the respectively associated electrode connection 4 or 5 and thus to connect it electrically. This one-sided access is made possible via the respective through-opening 45 or 46 . In particular, the respective contacting element 43 or 44 can be welded to the respective associated electrode connection 4 or 5 and thus electrically connected by welding, in particular by resistance welding. In this way, it is possible to first mount the storage cells 2 in the cell holder 6 and thereby in the holder parts 7 and 8, in particular firstly in the holder part 7 or 8 and thereby insert them between the column parts 19 or 21, in particular while the contacting elements 43 and 44 are already attached to the holder part 7 or 8, and then the contacting elements 43 and 44 can be welded to the respective associated electrode connections 4 or 4 via the through-openings 45 and 46 and thus electrically connected. This allows a particularly simple and cost-effective production of the electrical energy store 1 to be implemented. The welding may be High Capacitor Discharge Welding, which uses high currents drawn from a capacitor to weld, which currents melt and fuse the material.

Out of 32 it can be seen that the through-opening 45 can be designed as a slot and/or oval. Particularly good looking 32 The temperature control lines 36 and their meanders 42, which are arranged in the respective column elements 33, can also be seen. also particularly recognizable 32 is the temperature control line 13, which is arranged in the recess 58 of the cover element 21.

Out of 33 and 34 the passage openings 45 and 46 can be seen on the one hand. On the other hand it's over 33 and 34 It is particularly easy to see how the connecting finger 51 of the contacting element 43 penetrates the corresponding through-opening 52 of the cover element 21 and thereby protrudes beyond the cover element 21 or protrudes from it.

35 shows a detail of a schematic perspective view of the cell holder 6 for an eleventh embodiment of the energy storage device 1. In the eleventh embodiment, the holder parts 7 and 8, which are preferably formed separately from one another, are articulated to one another by means of at least or exactly one joint 64 in such a way that the holder parts 7 and 8 um . This makes it possible, for example, to first insert the storage cells 2 into the holder part 8 and thereby between its column parts 22, while the holder parts 7 and 8 are still folded apart. The holder parts 7 and 8 can then be folded together and connected to one another by pivoting the holder parts 7 and 8 about the pivot axis relative to one another and thereby pivoting them towards one another. Simulations have shown that such production of the energy store 1 is possible without any problems.

36 shows a detail of a schematic perspective view of the cell holder 6 for a twelfth embodiment of the energy store 1. In the twelfth embodiment, the respective connecting element 31 or 32 is designed as a latching element, so that the connecting elements 31 and 32 can be latched or latched to one another. As a result, the holder parts 7 and 8 are locked together and thus connected to each other. The respective latching element (connecting element 31 or 32) has a plurality of latching steps or latching hooks arranged one after the other, with the latching steps of connecting element 31 interacting in a form-fitting manner with the latching steps of connecting element 32, as a result of which connecting elements 31 and 32 are latched together. In the twelfth embodiment, a particularly compact design can be implemented, particularly in the direction of longitudinal extension of the respective storage cell 2 .

Overall, it can be seen that the temperature control line 36 or its length range (meander 42) at least in the column parts 19 and / o which are inserted into the column parts 22 or into the column elements 33, in particular from the side of the cell holder 6. Alternatively or additionally, it is conceivable that the temperature control line 36 or its length areas (meander 42) or a further, additional and separate temperature control line or its length areas or meanders is or are plugged into the column parts 22 and/or 19 or into the column elements 33, in particular from the holder part 8 side.

37 and 38 once again illustrate the contacting elements 43 and 44 as well as the insulation layer 60 and the insulation element 57.

39 and 40 each show a thirteenth embodiment of the energy store 1 in the form of a detail in a schematic and sectional perspective view 39 and 40 a possibility is described of attaching the contacting elements 43 and 44, and consequently the contacting device 10, to the cell holder 6, in particular to the holder part 8 and very particularly to the cover element 21. For this purpose, the holder part 8 initially has bolts 65 , which initially protrude from the cover element 21 . The bolts 65 protrude from the cover element 21 . The bolts 65 are preferably formed in one piece with the cover element 21 so that, for example, the bolts 65 and the cover element 21 can be formed from the same plastic. The contacting elements 43 and 44 are arranged on the cell holder 6 in such a way that the bolts 65 are pushed through the openings 48 and 49 in the contacting elements 43 and 44 . this is in 39 illustrated. The bolts 65 are then heated and thereby in particular melted and/or remelted, so that - as in 40 is shown - are arranged on a respective side of the respective contacting element 43 or 44, facing away from the cover element 21, wall regions 66 of the cell holder 6, in particular of the holder part 8, which are covered towards the cover element 21 by respective wall regions of the contacting elements 43 and 44. As a result, the contacting elements 43 and 44 are clamped between the cover element 21 and the wall areas 66 and are thus held on the holder part 8 .

Out of 37 and 38 It can be seen that the respective opening 48 or 49 is conical on the inner circumference at least in a partial area and thus has a conicity, which is realized, for example, in the following way: For example, the respective contacting element 43 or 44 is produced by stamping, with the contacting element being formed by stamping 43 or 44 is punched out of a starting material or separated from a starting material. The conicity of the respective opening 48 or 49 is preferably produced by stamping and thus in a stamping process, in particular by a corresponding conical bolt. For example, the bolts 65 are heated by ultrasound and thus remelted and thus remelted, for example, by ultrasonic welding. The bolts 65 are carrier-side pins, ie pins of the cell holder 6, the carrier-side pins being used to fasten the contacting elements 43 and 44, also referred to simply as contacts, to the cell holder 6 and here to the holder part 8. As an alternative to this, it is conceivable to fasten the contacting elements 43 and 44 by means of the fastening elements 50 . The fastening elements 50 are preferably latching elements, ie clips, which, when they are inserted through the openings 48 and 49, are at least partially elastically deformed and, in the process, are in particular moved towards one another. The fastening elements 50 are pushed through the openings 48 and 49 until they spring back and subsequently engage behind the contacting elements 43 and 44, as a result of which the contacting elements 43 and 44 are fastened firmly and stably to the cell holder 6. The conicity of the respective openings 48 and 49 described above can be used as an insertion bevel, in particular if the conicity is arranged or provided on an upper side facing away from the cover element 21 and/or on an underside of the respective contacting element 43 or 44 facing the cover element 21 is.
41 shows a fourteenth embodiment of the energy store 1 in a schematic exploded view. The energy store 1 according to the fourteenth embodiment comprises the temperature control line 36 arranged on the side of the holder part 8 and a further, additional temperature control line 67 to which the following and previous versions of the temperature control line 36 can be transferred and vice versa. In particular, it is conceivable that the temperature control lines 36 and 67 are designed to be identical or structurally identical. The meanders 42 of the temperature control line 36 are plugged into the column elements 33 in particular in such a way that the meanders 42 (length areas) of the temperature control line 36 are plugged exclusively into the column parts 19 in relation to the column parts 19 and 22 . In contrast, the meanders 42 (length areas) of the temperature control line 67 are plugged into the column elements 33 in particular in such a way that the meanders 42 (length areas) of the temperature control line 67 are plugged exclusively into the column parts 22 in relation to the column parts 19 and 22. Here is the Temperature control line 67 separately from the temperature control line 36, separately from the storage cells 2, separately from the cell holder 6 and separately from the contacting device 10 and also separately from the insulation layer 60 and present also separately from the temperature control lines 13 and 15 and provided in addition thereto.

The energy store 1 according to the fourteenth embodiment also includes the intumescent material 61 and thus its parts 62, which are arranged in the fully manufactured state of the energy store 1 according to the fourteenth embodiment in the column elements 33, in particular in such a way that the parts 62 in relation to the column parts 19 and 22 are received exclusively in the column parts 22. In particular, the parts 62 are inserted into the column parts 22, in particular in such a way that, with respect to the column parts 19 and 22, the parts 62 are exclusively inserted into the column parts 22, specifically from the holder part 8 side. In the fourteenth embodiment, the parts 62 are cylindrical bolts, ie cylinders, so that the respective part 62 has the shape of a right circular cylinder on the outer circumference. As an alternative to this, it would be conceivable for the respective part 62 to have a shape on the outer circumference that differs from a cylindrical or circular shape, in particular an angular shape. For example, the respective part 62 can be angular, in particular triangular, on the outer circumference. In the fourteenth embodiment of the energy store 1, it is also provided that the parts 62 arranged in the column elements 30 are connected to one another. It is conceivable that the parts 62 are formed in one piece with each other. The parts 62 are connected to one another via at least one connecting element 68 which is preferably arranged outside the column elements 33 . It is conceivable that the connecting element 68 is formed in one piece. In particular, the connecting element 68 can be formed in one piece with the parts 62 so that the connecting element 68 is preferably a part of the intumescent material 61 or is formed from the intumescent material 61 . The parts 62 and the connecting element 68 thus form a comb, thus a comb-shaped component 69, the prongs of which formed by the parts 62 protrude from the connecting element 68, in particular along the respective longitudinal direction of the respective storage cell 2. Furthermore, it is preferably provided that the holder parts 7 and 8 are identical or structurally identical, so that the holder parts 7 and 8 can also be produced inexpensively.

The intumescent material 61, in particular the parts 62, can be fixed to the cell holder 6, in particular to the holder part 8, for example in the following manner: the parts 62 or the intumescent material 61 can be clamped to the column parts 22, in particular by the respective part 62 is larger, in particular with regard to its outer circumference, than the columnar part 22, in particular with regard to its inner circumference. Alternatively or additionally, it is conceivable that the respective part 62 is glued to the respective column part 22, in particular by means of an adhesive that is filled, for example, in at least one cavity between the respective part 62 and the respective column part 22. Alternatively or additionally, the intumescent material 61, in particular the respective part 62, can be connected to the cell holder 6, in particular to the respective column element 33 and very particularly to the column part 22, via a spacer. For example, the temperature control line 67, in particular its respective meander 42, can act as the spacer, so that for example the respective part 62 is supported via the respective meander 42 of the temperature control line 67 on the column part 22, in particular on its inner peripheral lateral surface. Furthermore, it is conceivable that the spacer is attached to the temperature control line 67, in particular to the respective meander 42. By means of the meander, for example, the respective part 62 is pressed against the respective column part 22, in particular with the formation of a press fit. Alternatively or additionally, it is conceivable that the intumescent material 61 or the respective part 62 is fixed from the outside, i.e. from outside the respective column element 33, for example by means of a cable tie on a cell holder 6, also referred to as a carrier, and/or by an additional Plate which is clipped, for example, into the cell holder 6, in particular into the holder part 8 and very particularly, for example, into the cover element 21, which is also referred to as a carrier plate or is designed as a carrier plate.

It is also conceivable that a plurality of first parts 62 are connected to one another via a first connecting element, and a plurality of second parts 62 are connected to one another via a second connecting element. It is conceivable that the connecting elements are designed as separate components, wherein the connecting elements can be connected to one another, for example, by means of at least one third connecting element. Furthermore, it is conceivable that the connecting elements are formed in one piece with one another. Furthermore, it is conceivable that the third connection element is formed in one piece with the first connection element and with the second connection element.

42 shows the fourteenth embodiment, wherein in FIG 42 only the temperature control lines 36 and 67 are shown. Out of 42 is special It is easy to see that the temperature control lines 36 and 67 are identical, that is to say they are constructed in the same way.

In 43 a fifteenth embodiment of the energy store 1 is illustrated. In the fifteenth embodiment, the parts 62 are each polygonal, in particular triangular, on the outer circumference.

44 Fig. 16 shows a sixteenth embodiment. In the sixteenth embodiment, the respective first parts 62 and the first connection element form a first, in 44 assembly designated 70, and the second parts 62 and the second connecting element form a second assembly 71. The assemblies 70 and 71 are formed separately from one another and are not directly connected to one another and are thereby arranged side by side. The parts 62 do not necessarily have to be formed from the or an intumescent material 61 . It would be conceivable that the parts 62 are formed from an extinguishing agent such as CO ₂ or can contain an extinguishing agent such as CO ₂ . In other words, the parts 62 could be containers, in particular ampoules, capsules or the like, with the containers being able to contain an extinguishing agent such as CO ₂ . The extinguishing agent could be released in the event of heating and the resulting melting of the containers and extinguish any fire in the energy store 1 .

45 shows a seventeenth embodiment of the energy storage device 1. In the seventeenth embodiment, the parts 62 are not directly connected to one another but separately, with the parts 62 being arranged in the column elements 33 and thereby in the column parts 19 and in the column parts 22, with the parts 62 not among themselves, that is not directly connected to one another, as is provided in particular in the fifteenth and fourteenth embodiments.

Finally illustrate 46 until 56 an eighteenth embodiment of the energy store 1. In the eighteenth embodiment, the energy store 1 has a plurality of electronic computing devices 72 and 73, which are designed separately from one another and separately from the storage cells 2 and separately from the cell holder 6, which are also referred to as battery management systems (BMS). The electronic computing device 72 is also referred to as the first battery management system, and the electronic computing device 73 is also referred to as the second battery management system. The first battery management system is assigned to a first group of storage cells 2 , the first group comprising a first number of storage cells 2 that is greater than 1 . The second battery management system is assigned to a second group of storage cells 2 , the second group comprising a second number of storage cells 2 that is larger than 1 . The storage cells 2 of the first group can be monitored by means of the first battery management system, in particular with regard to their respective cell voltages. The storage cells 2 of the second group can be monitored by means of the second battery management system, in particular with regard to their respective cell voltages. For this purpose, for example, the respective battery management system is electrically connected to the respective connection fingers 51 of the contacting device 10, in particular the contacting element 43, the respective battery management system being electrically connected to the contacting element 43 and, via this, to the respective storage cells 2. In particular via the respective connecting finger 52, the respective battery management system can control the respective storage cell 2, to which the respective battery management system is assigned, in such a way that the respective storage cell 2, to which the respective battery management system is assigned, is discharged or charged with such a high electric current that web 56 melts, burns through or fails in some other way, with the result that the respective storage cell 2, to which the respective battery management system is assigned, is separated from the contacting device 10, in particular from the contacting element 43, and thus from the remaining storage cells 2, while the remaining storage cells 2 remain electrically connected to one another via the contacting device 10 .

Out of 47 It is particularly easy to see that the cell holder 6 has a respective cell receptacle 74 for each storage cell 2, in which the respective storage cell 2 is received. the respective storage cell 2 is formed or delimited by the respective column elements 33, which surround the respective storage cell 2 along their respective circumferential direction. Furthermore, the cell holder 6 has at least or exactly one device receptacle 75, in particular for each battery management system, which is formed or delimited, for example, by the respective column elements 33. The respective device receptacle 75 has the same inner peripheral shape or geometry as at least a partial area of the respective cell receptacle 74. In addition, at least one partial area T1 of the respective battery management system is just as cylindrical on the outer peripheral side as the respective storage cell 2 or at least one respective partial area T2 of the respective storage cell 2, so that the partial areas T1 and T2 have the same shape on the outer circumference, and the respective partial area T2 of the respective memory cell in the respective cell receptacle 74 and the respective partial area T1 of the respective battery management system is received in the respective device receptacle 75 . Due to the fact that the respective second partial area T1 of the respective electronic computing device 72 or 73 is arranged or accommodated in the respective device receptacle 75, the respective battery management system is held on the cell holder 6. In particular, the cell receptacle 74 and the device receptacle 75 or partial areas T1 and T2 have the same shape factors, which means that the battery management systems can be mounted on the cell holder 6 in a particularly simple manner.

At least one of the cell receptacles 74 in the circumferential direction of the storage cell 2, which is accommodated in the one cell receptacle 74, is at least partially delimited directly by a first wall region of the respective column element 33 and thus of the cell holder 6, with the respective device receptacle 75 in the circumferential direction of the partial region T1 of the respective battery management system is at least partially directly delimited by a second wall area of the respective column element 33 and thus of the cell holder 6, with the fact that the respective column part 19 or 22 is formed in one piece, the first wall area is formed in one piece with the second wall area or vice versa.

Particularly good looking 48 and 49 it can be seen that the respective battery management system is at least electrically connected to the respective storage cells 2, in particular to the connecting fingers 51 and thus to the contacting device 10 and via this to the storage cells 2, via respective lines 76 designated as cables or designed as cables. For example, some of the lines 76 form a respective group 77 with lines 76. It can be seen that the respective group 77 of lines 76 is assigned a holding strip 78 made of plastic, for example, on which the lines 76 of the respective group 77 are attached by means of at least one holding part 79 is held. The respective holder part 79 comprises two holding elements 80 which are connected to one another in an articulated manner and which, for example, can be clipped together and thereby connected to one another. In particular, the holding elements 80 can be moved toward one another in order to thereby clamp the lines 76 between the holding elements 80 and thus fasten them to the holding strip 78 .

The holding elements 80 and one of the holding parts 79 and the holding strip 78 are particularly good 50 and 51 recognizable. The respective line 76 has a respective first plug 81 which is accommodated in a receptacle 82 of the holding strip 78 . The respective connecting finger 52 is a second plug corresponding to the first plug 81, the plugs being connected to one another by a plug-in connection, as a result of which the plugs are mechanically and electrically connected to one another. As a result, the respective connecting finger 52 is electrically connected to the respective battery management system via the respective plug 81 and the respective line 76 . In the present case, the plugs are connected to one another in such a way that the respective plug 81 is plugged onto the respective connecting finger 52 . In other words, the respective connection finger 52 is at least partially plugged into the respective, corresponding plug 81 , as a result of which the respective connection finger 52 is at least electrically connected to the respective corresponding plug 81 .

Out of 52 it can be seen that the receptacle 82 is formed by a receiving element 83 of the retaining strip 78 , the retaining strip 78 preferably being formed in one piece with the receiving element 83 .

Out of 53 the recording of the partial areas T1 of the battery management systems in the corresponding device recordings 75 can again be seen particularly well.

Finally it's over 54 until 56 recognizable that the holding strips 78 are held pivotably at least indirectly, in particular directly, on the cell holder 6, so that - as in 56 is illustrated by an arrow 84, the respective holding bar 78 can be pivoted about a pivot axis S relative to the holder parts 7 and 8. If the lines 76 are held on the respective holding bar 78 by means of the holding parts 79, then when the respective holding bar 78 and the pivot axis S are pivoted relative to the holder parts 7 and 8, the lines 76 with the holding bar 78 relative to the holder parts 7 and 8 pivoted about the pivot axis S with. If the retaining strip 78 and with it the lines 76 are pivoted towards the holder parts 7 and 8, the plugs 81 are simultaneously plugged onto the corresponding connecting fingers 52, which electrically connects the battery management systems to the contacting device in a particularly simple, time-saving and cost-effective manner 10 and connected to the storage cells 2 via this.

For example, in the tenth embodiment, the respective end face S1 of the respective storage cell 2 and thus the electrode connections 4 and 5 are not on the holder part 7 or the cover element 18, but for example on the holder rteil 8 and thus facing the cover element 21, the previous and following statements on the temperature control line 13 and the holder part 7 can be easily transferred to the temperature control line 15 and the holder part 8 and vice versa.

In particular, mechanical assembly is possible as a result, in particular in that the cables and the retaining strips 78 acting as holders are guided or moved mechanically. The pivot axis S is formed, for example, by a flexible area, which not only enables the respective retaining strip 78 to pivot relative to the holder parts 7 and 8, but also, for example, tolerances in the three mutually perpendicular directions (the direction of longitudinal extent (double arrow 3) and the the double arrows 9 and 27 illustrated directions) can compensate.

Reference List

1

energy storage

2

storage cell

3

double arrow

4

electrode connection

5

electrode connection

6

cell holder

7

holder part

8th

holder part

9

double arrow

10

contacting device

11

cell case

12

collar

13

temperature control line

14

tempering channel

15

temperature control line

16

tempering channel

17

Arrow

18

cover element

19

column part

20

Arrow

21

cover element

22

column part

23

meander

24

meander

25

meander arm

26

meander arm

27

meander arm

28

meander arm

29

meander head

30

meander head

31

fastener

32

fastener

33

column element

34

double arrow

35

outer peripheral lateral surface

36

temperature control line

37

double arrow

38

meander

39

meander arm

40

meander arm

41

meander head

42

meander

43

contacting element

44

contacting element

45

passage opening

46

passage opening

47

recess

48

passage opening

49

passage opening

50

fastener

51

connection area

52

connection finger

53

passage opening

54

contacting area

54a

isolation element

55

contacting area

56

web

57

isolation element

58

recess

59

floor

60

insulation layer

61

intumescent material

62

Part

63

welding element

64

joint

65

bolt

66

wall area

67

temperature control line

68

fastener

69

comb-shaped element

70

assembly

71

assembly

72

electronic computing device

73

electronic computing device

74

cell uptake

75

facility recording

76

Management

77

group

78

retaining bar

79

holding part

80

holding element

81

plug

82

recording

83

receiving element

84

Arrow

B1, B2

broadside

BE1, BE2, BE3

area

R1, R2

cell row

S

pivot axis

T1, T2

subarea

Z1

first memory cells

Z2

second memory cells

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited 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.

Patent Literature Cited

• DE 112012007185 B4 [0002]
• JP 6079787 B2 [0002]
• EP 2509134 B1 [0002]
• JP 4990422 B1 [0002]
• DE 102015013800 A1 [0002]
• CN 105552264B [0002]

Claims (15)

Electrical energy store (1) for storing electrical energy for a motor vehicle, having a plurality of storage cells (2) designed to store electrical energy, each of which has at least one electrode connection (4) arranged on a respective end face (S1) of the respective storage cell (2). have, via which the electrical energy stored in the respective storage cell (2) can be made available by the respective storage cell (2), with a cell holder (6) which is formed separately from the storage cells (2) and on which the storage cells (2) are held , as a result of which relative movements between the storage cells (2) are at least limited, and with a contacting device (10) which is designed separately from the cell holder (2) and is held on the cell holder (2) and which is connected to the electrode connections ( 4) is electrically connected, whereby the memory cells (2) via the contacting device (10) elec are electrically connected to one another, characterized by at least one temperature control line (13) which is formed separately from the cell holder (6), is held on the cell holder (6) and through which a temperature control fluid can flow, through which the electrode connections (4) to the cell holder (6) respectively are at least partially overlapped, as a result of which the electrode connections (4) are to be temperature-controlled via the temperature-control line (13) by means of the temperature-control fluid. Electrical energy storage device (1) according to claim 1 , characterized in that the temperature control line (13) has two broad sides (B1, B2) facing away from one another, one of the broad sides (B1., B2) facing the respective electrode connections (4). Electrical energy storage device (1) according to claim 1 or 2 , characterized in that an insulating layer (60) is arranged between the contacting device (10) and the temperature control line (13), by means of which the temperature control line (13) is electrically insulated from the contacting device (10). Electrical energy storage device (1) according to claim 3 , characterized in that the insulation layer (60) on the one hand directly touches the temperature control line (13), in particular one broad side (B1, B2) of the temperature control line (13), and on the other hand the contacting device (10). Electrical energy storage device (1) according to claim 3 or 4 , characterized in that the insulation layer (60) is formed by an insulation element (60) which is formed separately from the cell holder (6) and is held on the cell holder (6). Electrical energy store (1) according to one of the preceding claims, characterized in that the respective storage cell (2) along its respective circumferential direction (34) is supported by a plurality of column elements (33) which follow one another in the circumferential direction (34) of the respective storage cell (2) and are spaced apart from one another. of the cell holder (6) and supported directly on the column elements (33). Electrical energy storage device (1) according to claim 6 , characterized by at least one further temperature control line (36) which is formed separately from the temperature control line (13) and separately from the cell holder (6), through which the temperature control fluid or another temperature control fluid can flow and which runs within the respective column elements (33). Having longitudinal regions (42), whereby the respective storage cell (2) via the respective column element (33) and the respective length region (42) is to be temperature-controlled by means of the tempering fluid or by means of the further tempering fluid. Electrical energy store (1) according to one of the preceding claims, characterized in that the cell holder (6) is provided with a material (61) whose volume increases under the effect of heat. Electrical energy storage device (1) according to claim 8 in its reference to claim 6 or 7 , characterized in that respective parts (62) of the material (61) are arranged inside the column elements (33). Electrical energy storage device (1) according to claim 9 , characterized in that the parts (62) of the material (61) arranged in the column elements (33) are connected to one another, in particular are formed in one piece with one another. Electrical energy store (1) according to one of the preceding claims, characterized by at least one electronic computing device (72) designed separately from the cell holder (6) and separately from the storage cells (2) for monitoring at least some of the storage cells (2). Electrical energy storage device (1) according to claim 11 , characterized in that: - the cell holder (6) has a cell receptacle (74) for each storage cell (2), in which the respective storage cell (2) is arranged, - the cell holder (6) has at least one device receptacle (75), - the device receptacle (75) has the same inner peripheral shape as at least a portion of the respective cell receptacle (74), - at least a first sub-area (T2) of the respective storage cell (2) and at least a second sub-area (T1) of the electronic computing device (72) have the same shape on the outer circumference, and - the second sub-area (T1) of the electronic computing device (72) in the Device receptacle (75) is arranged, whereby the electronic computing device (72) is held on the cell holder (6). Electrical energy storage device (1) according to claim 12 , characterized in that at least one of the cell receptacles (74) in the circumferential direction (34) of the storage cell (2), which is accommodated in one cell receptacle (74), is at least partially directly delimited by a first wall region of the cell holder (6), wherein the device receptacle (75) is at least partially directly delimited in the circumferential direction of the second partial area (T1) by a second wall area of the cell holder (6) formed in one piece with the first wall area. Electrical energy store (1) according to one of the preceding claims, characterized in that the cell holder (6) has two holder parts (7, 8) which: - are formed separately from one another and are connected to one another, and/or - are articulated to one another. Motor vehicle with at least one electrical energy store (1) according to one of the preceding claims.

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