WO2023110543A1 - Electrical energy storage device with terminal temperature control and a gas duct - Google Patents

Abstract

The invention relates, inter alia, to an electrical energy storage device (10) for a motor vehicle. The energy storage device (10) has a plurality of battery cells (11) which each comprise a pressure relief valve (12) and contact poles (13). The energy storage device (10) also has a degassing duct (20) which fluidically connects the pressure relief valves (12) of the plurality of battery cells (11) to one another. The energy storage device (10) further comprises a temperature-control plate (30) for controlling the temperature of the plurality of battery cells (11) and also comprises a heat-conducting device (40) via which a plurality of the contact poles (13) of the plurality of battery cells (11) are thermally conductively connected to the temperature-control plate (30). The energy storage device (10) is distinguished in that the degassing duct (20) and the heat-conducting device (40) are arranged between the temperature-control plate (30) and the plurality of battery cells (11).

Description

Electrical energy storage device with terminal temperature control and gas duct

Description

The invention relates to an electrical energy storage device, an electrical energy storage device having a plurality of such energy storage devices, and a motor vehicle having such an energy storage device.

Electrical energy stores (eg high-voltage batteries) for motor vehicles are well known in the prior art. Such energy stores usually consist of a large number of battery cells which are or can be electrically connected to one another and which are usually thermally conditioned, i. H. cooled or heated, in order to function optimally and over the long term. To condition the battery cells, the energy storage mostly have temperature control devices, e.g. B. in the form of a channel structure through which a liquid heat carrier flows. The temperature control devices should preferably be designed in such a way that the battery cells can be conditioned as uniformly as possible over a wide operating range. In the case of known energy stores, the battery cells are usually temperature-controlled on one side, preferably from below. The battery cells and/or battery cell modules are often z. B. "from above" screwed to the temperature control unit or attached via tolerance compensation elements.

In addition to the conditioning of the battery cells, the provision of safety devices to prevent thermal propagation is particularly relevant when using lithium-ion battery cells. External influences or a fault in one of the battery cells (e.g. an internal short circuit) can lead to thermal runaway. In the process, large amounts of energy are released as a result of internal exothermic reactions, with at least part of the electrolyte in the cell changing to a gaseous state. The temperature of the gas can reach several hundred °C and even over 1000 °C. The gas flow may also contain particles and lead to a short circuit in the live components. This can lead to chain reactions (thermal propagation) in the energy store, which can ultimately destroy the entire energy store. In order to derive the gas flow from battery cells in the most controlled manner possible in the event of a fault, the provision of corresponding overpressure or safety valves, so-called “safety vents”, on the battery cells is therefore known in the prior art. For example, refer to US 2006/0292437A1 grasslands. To avoid damage to other battery components, the corresponding gas flow should be separated from the remaining battery components and out of the battery. B. can be done via appropriate channel systems.

A disadvantage of the known solutions for temperature control and gas discharge is the often high component and space requirement of the temperature control or degassing devices.

The invention is therefore based on the object of providing an improved energy storage device for a motor vehicle. It is preferably an object of the invention to provide a solution by means of which simple and/or space-saving temperature control and also the greatest possible security against thermal propagation can be achieved.

These objects can be solved with the features of the independent claims. Advantageous embodiments and applications of the invention are the subject matter of the dependent claims and are explained in more detail in the following description with partial reference to the figures.

The core idea of the invention is here, several functions, including z. B. to integrate the cell temperature, the gas flow, the attachment of battery cells and, if necessary, a tolerance compensation in a component or a common assembly. In addition to simplifying assembly, synergy effects such as B. a dual use of wall sections for thermal and mechanical connection can be used to provide a space-saving solution overall.

According to a first independent aspect, an electrical energy storage device is provided for a motor vehicle, preferably a utility vehicle (such as a truck or bus). The energy storage device is preferably a high-voltage energy storage device.

The electrical energy storage device has a plurality of battery cells (eg clamped together). The multiple battery cells are preferably arranged in one plane, e.g. B. in the form of several battery cell stacks arranged side by side. The number of battery cells can also be referred to as a battery cell group. The multiple battery cells each have contact poles (e.g., a positive pole and a negative pole). Each of the multiple battery cells preferably also has a pressure relief valve. the pressure relief valve, which can also be referred to as a safety valve, can preferably be used to vent the respective battery cell (in the event of a fault).

The electrical energy storage device further includes a (eg, tubular) degassing channel. The degassing channel preferably connects the pressure relief valves of the multiple battery cells to one another in a fluidic manner. The degassing duct, which can also be referred to as a collecting duct, is preferably used to collect gases escaping from the battery cells (in the event of a fault) and to evacuate them preferably in a controlled manner from the electrical energy storage device, i. H. to the outside, to dissipate. For this purpose, the degassing channel can span the pressure relief valves of the plurality of battery cells and/or be designed to run in a manner corresponding to the pressure relief valves.

The electrical energy storage device also has a tempering plate for tempering (eg heating or cooling) the multiple battery cells or the battery cell group. For this purpose, a temperature control fluid can preferably flow through the temperature control plate. For example, the tempering plate can have one or more (e.g. meandering) channels through which a tempering fluid (e.g. water and/or glycol) can flow.

Furthermore, the electrical energy storage device comprises a heat-conducting device, via which several, preferably all, of the contact poles of the several battery cells are thermally conductively connected to the tempering plate. The heat conducting device thus preferably serves to thermally couple the plurality of contact poles of the battery cell group or of the plurality of battery cells to the tempering plate. Accordingly, in this context one can also speak of direct temperature control of the electrical connections (e.g. contact pole or terminal cooling). For example, the heat conducting device can be directly connected (e.g. at one end) to the tempering plate and (e.g. at another end) directly to the multiple contact poles or a contacting system of the energy storage device. The heat conducting device can thus preferably enable an exchange or transport of heat between the tempering plate and the contact poles by means of heat conduction.

The electrical energy storage device is characterized in that the degassing channel and the heat conducting device are arranged between the tempering plate and the multiple battery cells. The degassing channel and the heat conducting device are preferably arranged in a clamped manner between the temperature control plate and the plurality of battery cells. Advantageously, such a mechanical stress holding down the Battery cells can be achieved and also the best possible thermal connection of the multiple battery cells to the tempering plate can be ensured. As will be explained in detail below, this arrangement also advantageously allows the respective functions of the components (cooling, gas flow, etc.) to be integrated into common components or assemblies.

According to one aspect, the degassing channel can be integrated at least in sections into the heat-conducting device. The degassing channel can thus be designed in sections as part of the heat-conducting device. For example, the degassing duct and the heat conducting device can be permanently installed together and/or cannot be detachably connected. Advantageously, as will be described in more detail below, the components of the heat conducting device can be used twice in a way that saves on components.

According to one aspect, the heat-conducting device can have wall sections that delimit the degassing channel at least in sections. Correspondingly, a part of the heat conducting device can form the degassing channel at least in sections. In other words, the degassing channel can be at least partially integrated into the heat-conducting device. The heat-conducting device can thus advantageously—in addition to its heat-conducting function—also be used to limit or form the degassing channel. The advantage of this is that components (e.g. a separate wall of the degassing channel) and thus weight can be saved as a result, and assembly can be simplified as a result (fewer components, integrated tolerance compensation).

According to a further aspect, the heat conducting device can comprise a, preferably vertical, first wall section. Furthermore, the heat conducting device can comprise a preferably vertical, second wall section. In particular, the aforementioned wall sections can have the first and/or second wall section. The second wall section is preferably arranged or oriented parallel to the first wall section. For example, the first and second wall sections can be oriented perpendicularly to the temperature control plate and connect the temperature control plate to the multiple battery cells in a thermally conductive manner. Furthermore, the first and second wall section can delimit the degassing channel, preferably laterally. The first and second wall sections thus preferably delimit the degassing channel on opposite sides of the degassing channel. As a result, the degassing channel can in turn be integrated at least partially into the heat-conducting device in an advantageous manner. According to a further aspect, the heat conducting device can have a first contact rail (eg plate-shaped). The first contact bar can be connected to the first wall section. Preferably, the first contact rail is integrally connected to the first wall section in one piece. Alternatively, the first contact rail can also be screwed or welded to the first wall section. In a preferred embodiment, the first contact rail can be oriented perpendicular to the first wall section. Furthermore, several of the contact poles, which are thermally conductively connected to the temperature control plate via the heat conducting device, can be connected to the first wall section via the first contact bar. Merely as an example, the first contact bar can have a first end area that is connected to the first wall section, preferably directly, and a second end area that is connected to the corresponding contact poles directly or indirectly via a contacting system. In this way, a targeted temperature control of the electrical connections of the battery cells can advantageously be provided.

In addition or as an alternative, the heat-conducting device can also have a second contact rail (eg, plate-shaped). The second contact bar can be connected to the second wall section. The second contact rail is preferably connected integrally in one piece to the second wall section. Alternatively, the second contact rail can also be screwed or welded to the second wall section. In a preferred embodiment, the second contact bar can be oriented perpendicular to the second wall section. Furthermore, several of the contact poles, which are thermally conductively connected to the tempering plate via the heat-conducting device, can be connected to the second wall section via the second contact bar. The first contact bar and the second contact bar are preferably in contact with different contact poles. Merely as an example, the second contact bar can also have a first end area, which is connected to the second wall section, preferably directly, and a second end area, which is connected directly or indirectly to the corresponding contact poles via a contacting system. In this way, too, targeted temperature control of the electrical connections of the battery cells can be provided in an advantageous manner.

According to a further aspect, the first contact bar and the second contact bar can each protrude in opposite directions from the heat-conducting device. For example, the first and second contact rails can each be oriented perpendicular to a longitudinal center plane of the heat-conducting device. In addition or alternatively, the first and second contact bar can also be configured essentially identically. For example, the first and second contact rails can each have essentially the same dimensions (width, height, length). In addition or as an alternative, the first and second contact rails can also be arranged collinear with one another. That is, the first and second contact rails can preferably be arranged lying on a common (imaginary) straight line. In this way, a heat-conducting device that is as symmetrical as possible and therefore easy to manufacture can be provided in an advantageous manner.

In order to advantageously ensure the most reliable possible thermal contact between the multiple contact poles of the battery cells and the heat conducting device (and possibly compensate for manufacturing tolerances), the first contact rail can be flexible at least in sections according to a further aspect. For example, the first contact rail can include an end region that faces the corresponding contact poles and that can be designed to be flexible. In addition or as an alternative, the second contact rail can also be flexible, at least in sections. Correspondingly, the second contact rail can also comprise an end region which faces the corresponding contact poles and which can be designed to be flexible.

According to a further aspect, the first contact rail can be integrally connected in one piece to the first wall section. The first contact bar and the first wall section can thus preferably be continuously seamlessly connected to one another. In addition or as an alternative, the second contact rail can also be integrally connected in one piece to the second wall section. Correspondingly, the second contact bar and the second wall section can preferably be seamlessly connected to one another throughout. This in turn can advantageously simplify the production of the heat-conducting device, since this comprises fewer (separate) components.

According to a further aspect, the first contact rail can be electrically insulated from the first wall section. For example, electrical insulation (eg a plastic) can be arranged between the first contact bar and the first wall section. In addition or as an alternative, the second contact rail can also be electrically insulated from the second wall section. For example, electrical insulation (eg a plastic) can be arranged between the second contact rail and the second wall section. This advantageously makes it possible to also use the contact rails for contacting the battery cells, if necessary. In order to advantageously enable contacting of the multiple battery cells in addition to temperature control of the electrical connections, according to a further aspect, the heat-conducting device can have at least one electrically conductive section. For example, the heat conducting device or parts of the heat conducting device can be made of an electrically conductive material (eg metal). Alternatively, the at least one electrically conductive section can also be attached or fastened to the heat-conducting device. The at least one electrically conductive section preferably has a plurality of electrically conductive sections. A plurality of the contact poles, which are thermally conductively connected to the temperature control plate via the heat conducting device, can be electrically contacted via the aforementioned at least one electrically conductive section. For example, the plurality of battery cells can be electrically connected to one another in pairs via the at least one electrically conductive section. As an alternative to this, the heat-conducting device can also be electrically insulated from the plurality of contact poles of the plurality of battery cells. For example, the contact poles of the battery cells can be connected by means of a (separate) contacting system, so that the heat-conducting device can only be used to control the temperature of the electrical connections. In this case, electrical insulation (eg made of plastic) can be arranged between the heat-conducting device and the plurality of contact poles or between the heat-conducting device and the contacting system.

In order to advantageously avoid further damage to the energy storage device in the event of a thermal runaway of one of the battery cells (e.g. due to electrically conductive particles also being ejected), the degassing channel can be fluidically separated from the contact poles of the several battery cells according to a further aspect. The degassing channel is thus preferably sealed off (fluidically) from the contact poles. In addition or as an alternative, the degassing channel can be delimited by a preferably tubular wall. That is to say, the energy storage device can comprise a preferably tubular wall (e.g. a hollow profile) which delimits the degassing channel. The wall preferably has openings arranged correspondingly to the overpressure valves. In addition or as an alternative, the degassing channel can be designed to be open in the direction of the pressure relief valves. Merely as an example, the degassing channel can be delimited for this purpose by a hollow channel that is open on one side and is preferably U-shaped. In addition or as an alternative, the temperature of the degassing channel can also be controlled by means of the tempering plate. For example, the degassing channel can be delimited directly by the tempering plate, at least in sections. Furthermore, the degassing channel can be at least partially made of components nents are limited (e.g. the heat conducting device or the wall) that are thermally conductive (mechanically) connected to the tempering plate. Advantageously, the gas can be additionally cooled in the case of degassing, so that thermal contamination of further battery cells by the hot gas can be avoided or reduced.

According to a further aspect, the heat conducting device can comprise a plurality of preferably bow-shaped heat conducting elements. The plurality of heat-conducting elements are preferably spaced apart from one another. That is, the plurality of (separate) heat-conducting elements cannot be in direct mechanical contact with one another. The multiple heat-conducting elements are preferably made from an electrically conductive material. Furthermore, the plurality of heat-conducting elements can electrically connect the plurality of battery cells to one another in pairs. In an advantageous manner, the heat conducting device can also be used for electrically contacting the battery cells, in addition to controlling the temperature of the electrical connections.

According to one embodiment, the heat-conducting elements can each comprise two flat side parts, preferably arranged in one plane. The respective side parts can each be connected to a contact pole of different battery cells. Furthermore, the heat-conducting elements can each have a curved, preferably U-shaped, central part. This can connect the two flat side parts with each other. Preferably, the two flat side parts and the middle part are integral-one-piece, i. H. continuously seamless, connected to each other. The respective central parts of the respective heat-conducting elements can be connected to the tempering plate.

According to a further aspect, the plurality of battery cells can be arranged as at least two battery cell stacks. The at least two battery cell stacks can each have the same stacking direction. The at least two battery cell stacks are preferably offset perpendicularly to the stacking direction, ie arranged parallel to one another. Furthermore, the degassing channel can have at least two straight main channel sections. The at least two straight main channel sections can each be assigned to one of the at least two battery cell stacks. For example, the at least two straight main channel sections can each be arranged on a side face of one of the at least two battery cell stacks. Furthermore, the at least two straight main channel sections can be oriented along the same stacking direction. That is, the at least two straight main channel sections can be oriented parallel to one another. Furthermore, the degas sungskanal have at least one branch channel section that fluidly connects two of the at least two straight main channel sections with each other. The at least one branch channel section is preferably oriented perpendicular to the at least two straight main channel sections.

According to a further aspect, in order to advantageously increase the mechanical strength of the arrangement, the electrical energy storage device can also have a support plate (eg a steel plate). In this case, the support plate can be arranged between the tempering plate and the degassing channel and/or between the tempering plate and the heat-conducting device. The tempering plate is preferably supported on the support plate. The support plate is particularly preferably designed with essentially the same surface area as the temperature control plate. The support plate can be a separate component. However, as will be explained in detail below, the support plate is preferably also integrated into the heat-conducting device.

In one embodiment, the support plate and the heat-conducting device can be integrally connected in one piece. In addition or as an alternative, the support plate and the heat-conducting device can be non-detachably connected. i.e. the support plate and the heat-conducting device can be connected to one another in such a way that the component is destroyed by separating the respective components.

According to a further aspect, at least two of the following components can be designed as a common component: the degassing channel, the tempering plate, the heat-conducting device and the support plate. In other words, two or more of the aforementioned components can form a structural (e.g. prefabricated) unit. For example, the degassing channel can be integrated into the heat-conducting device. In addition or alternatively z. B. the temperature control plate with the heat conducting device can be integrally connected in one piece. Advantageously, this allows several functions (e.g. gas flow, temperature control, mechanical bracing, tolerance compensation) to be integrated in one component. B. "quasi as a part" can be placed on the multiple battery cells or the battery cell group. Overall, the available installation space can be used as optimally as possible in an advantageous manner and the weight and complexity of the device can be reduced by eliminating separate components. Another advantage of using a combined component is that fewer tolerances have to be compensated. According to a further aspect, the degassing channel can be delimited, preferably at least in sections, by the plurality of battery cells, the heat-conducting device and the tempering plate. i.e. Parts of the battery cells, the heat conducting device and the tempering plate can form an outer boundary for the degassing channel. For example, the plurality of battery cells can delimit the degassing channel at the bottom, the heat-conducting device can delimit the degassing channel at the side and/or the tempering plate can delimit the degassing channel at the top. In addition or as an alternative, the degassing channel can be delimited, preferably at least in sections, by the plurality of battery cells, the heat-conducting device and the support plate. i.e. Parts of the battery cells, the heat conducting device and the support plate can form an outer boundary for the degassing channel. For example, the plurality of battery cells can delimit the degassing channel at the bottom, the heat-conducting device can delimit the degassing channel at the side and/or the support plate can delimit the degassing channel at the top.

According to a further aspect, the electrical energy storage device can have a container. The multiple battery cells can be arranged or accommodated in the container. The container can have an outer container wall. The container outer wall can be essentially frame-shaped, preferably essentially polygonal frame-shaped, particularly preferably essentially rectangular frame-shaped. The outer wall of the container is preferably completely circumferential or forms a closed, multi-sided (e.g. four-sided) frame.

Furthermore, an electrical energy store (eg a high-voltage battery) is provided for a motor vehicle, preferably a commercial vehicle (such as a truck or bus, for example). The electrical energy store has a number of electrical energy storage devices, as described in this document. All the features described in connection with the energy storage devices themselves should also be disclosed and claimable in connection with the electrical energy storage device. The same should also apply vice versa. The multiple electrical energy storage devices of the energy store are stacked (e.g. one on top of the other), preferably aligned or aligned with one another. A stacking direction of the electrical energy storage devices is preferably vertical. The electrical energy store can thus be constructed from repeating units, as a result of which the production of the energy store can be simplified in an advantageous manner. According to one aspect, the multiple electrical energy storage devices of the energy storage device can be connected to one another in a thermally conductive manner. For this purpose, the multiple energy storage devices can be in direct mechanical contact with one another in pairs or can be connected to one another in pairs via a gap filler (e.g. in the form of a thermally conductive paste). The battery cells of one of the stacked energy storage devices are preferably connected to the tempering plate of another stacked energy storage device directly or indirectly via a gap filler or gap filler. In addition or as an alternative, the plurality of electrical energy storage devices can each be oriented in the same way. That is to say, the plurality of energy storage devices can be arranged offset in relation to one another in a plane-parallel manner. For example, the energy storage devices can be aligned with the tempering plate facing upwards. As a result, the temperature of the battery cells of the respective energy storage devices can be controlled both (indirectly via the heat conducting device) “from above” using the temperature control plate associated with them and (directly) “from below” using a temperature control plate of a further energy storage device in the stack. Overall, this advantageously enables reliable temperature control of the battery cells.

Furthermore, a motor vehicle (eg a truck) is provided, the motor vehicle having at least one electrical energy storage device as disclosed in this document and/or having an electrical energy storage device as disclosed in this document. Here again, all the features described in connection with the energy storage device or the energy storage device should also be disclosed and claimable in connection with the motor vehicle. The same should also apply vice versa. The motor vehicle is preferably a commercial vehicle. The expression “commercial vehicle” can be understood here in particular as a motor vehicle which, due to its design and equipment, is specially designed for transporting goods and/or for towing one or more (e.g. agricultural) trailer vehicles. For example, the commercial vehicle can be a truck, a tractor unit, a construction site vehicle and/or an agricultural machine (eg a tractor). The electrical energy store is preferably arranged on, on or between a frame of the motor vehicle or on a roof of the motor vehicle.

The aspects and features of the invention described above can be combined with one another as desired. Further details and advantages of the invention are described below with reference to the accompanying drawings. Show it: FIG. 1A shows a perspective illustration of an energy storage device according to an embodiment;

FIG. 1B shows a perspective detailed illustration of an energy storage device according to an embodiment;

FIG. 2A shows a sectional illustration of an energy storage device according to an embodiment;

FIG. 2B shows a schematic sectional illustration of an energy storage device according to an embodiment;

FIG. 3A shows a schematic sectional illustration of an energy storage device according to an embodiment;

FIG. 3B shows a schematic sectional illustration of an energy storage device according to an embodiment;

FIG. 3C shows a schematic sectional illustration of an energy storage device according to an embodiment;

FIG. 4A shows a perspective detailed representation of an energy storage device according to one embodiment;

FIG. 4B shows a schematic sectional illustration of an energy storage device according to an embodiment;

FIG. 5A shows a perspective detailed illustration of an energy storage device according to an embodiment;

FIG. 5B shows a sectional illustration of an energy storage device according to an embodiment;

FIG. 5C shows a perspective illustration of an energy storage device according to an embodiment; and

FIG. 6 shows a schematic sectional view of an energy store according to one embodiment. The embodiments shown in the figures correspond at least in part, so that similar or identical parts are provided with the same reference symbols and, for their explanation, reference is also made to the description of the other embodiments or figures in order to avoid repetition.

FIGS. 1A to 5C each show an electrical energy storage device 10 for a motor vehicle (not shown separately), the figures showing partially different spatial views or sectional views of the electrical energy storage device 10 . Furthermore, the components shown in the figures are partially cut off or shown incomplete in order to thereby also show underlying components.

The motor vehicle is preferably designed as a truck. It is also possible for the motor vehicle to be designed, for example, as a bus, a construction machine, an agricultural machine or as a passenger car.

As a traction battery, the energy storage device 10 can provide electrical energy for at least one electric drive unit for driving the motor vehicle. For example, the motor vehicle can be driven by means of a central electric drive, by means of several electric wheel hub drives or several electric drives close to the wheel. The energy storage device 10 can, for example, be charged externally via an electrical charging cable connected to a charging socket of the motor vehicle.

The energy storage device 10 can be attached to a vehicle frame or roof of the motor vehicle. The energy storage device 10 can preferably be attached to an outer longitudinal side of one of the main side members of a vehicle frame of the motor vehicle designed as a ladder frame. Alternatively, the energy storage device 10 can be attached, for example, between the two main side members of a vehicle frame of the motor vehicle designed as a ladder frame.

In this case, the electrical energy storage device 10 has a plurality of, preferably identical, battery cells 11 . The plurality of battery cells 11 can also be referred to as a battery cell group. The battery cells 11 can be, for example, prismatic battery cells, round cells and/or pouch battery cells. The multiple battery cells 11 can, for. B. be arranged in the form of at least one battery cell stack. By way of example only, the multiple battery cells 11 can be in the form of three next to one another arranged battery cell stacks (z. B. each sixteen battery cells 11) can be arranged. The battery cells 11 of a battery cell stack are preferably clamped together. The multiple battery cells 11 of a battery cell stack are preferably connected to one another in series. However, a parallel connection of the multiple battery cells 11 of a battery cell stack is also possible.

The plurality of battery cells 11 are preferably in one plane, e.g. B. horizontal plane arranged. For example, the multiple battery cells 11 can be arranged side by side or in a grid. A number of the multiple battery cells 11 can be freely selectable and adapted to the respective requirements.

The plurality of battery cells 11 also each have contact poles 13 (e.g. a positive pole and a negative pole). For reasons of clarity, the contact poles 13 are also not individually referenced in each of the figures. The contact poles 13, which can also be referred to as terminals, can each be arranged on the same side surface of the respective battery cells 11. The contact poles 13 can be arranged, for example, on an upper side of the battery cells 11 or oriented upwards. Furthermore, the pressure relief valve 12 can be arranged between the contact poles 13 . The contact poles 13 of the multiple battery cells 11 can be connected to one another via a contacting system (eg in series). The contacting system can z. B. several, plate-shaped, include contact bridges, which z. B. each connect a contact pole 13 of a battery cell 11 with a contact pole 13 of an adjacent battery cell 11.

Furthermore, the plurality of battery cells 11 can each have a pressure relief valve 12 . For reasons of clarity, the respective overpressure valves 12 have not been individually provided with reference numbers in all figures. The respective pressure relief valves 12 can, for. B. in the form of a predetermined breaking point or material weakness in a housing of the respective battery cells 11 may be formed. The predetermined breaking point or weakening of the material can open automatically when a pressure threshold value is exceeded inside the battery cell 11 . The overpressure valves 12 can each be arranged centrally on a side surface of the respective battery cell 11 . The respective overpressure valves 12 of the battery cells 11 can be aligned in the vertical direction (eg upwards).

The electrical energy storage device 10 can also have a container 70 . The multiple battery cells 11 can be arranged or accommodated in the container 70 . The container 70 can have an outer container wall 71 . The outer wall of the container 71 can be essentially frame-shaped, preferably essentially polygonal frame-shaped, particularly preferably essentially rectangular frame-shaped. The container outer wall 71 is preferably completely circumferential or forms a closed, multi-sided (e.g. four-sided) frame. The container outer wall 71 can have two opposite end faces, e.g. B. on a top and on a bottom of the container outer wall 71 and the container 70. The end faces can be circumferential or closed. The end faces can be essentially frame-shaped, preferably essentially polygonal frame-shaped, particularly preferably essentially rectangular frame-shaped. The container outer wall 71 or the container 70 can also have a through-opening for the passage of electrical connectors and/or fluidic lines.

In order to control the temperature of the battery cell group or the plurality of battery cells 11, the electrical energy storage device 10 also has a temperature control plate 30 (e.g. a cooling and/or heating plate). The term temperature control plate 30 can preferably be understood to mean a preferably flat, plate-shaped (e.g. rectangular and/or cuboid) component for temperature control. The tempering plate 30 can span or cover the entire battery cell group. For example, the tempering plate 30 can be made of steel and/or aluminum.

The tempering plate 30 can cool and/or heat the multiple battery cells 11 during operation. For this purpose, the tempering plate 30 can be traversed by a preferably liquid tempering fluid (e.g. water and/or glycol). For example, the temperature control plate 30 can have one or more (e.g. meandering) channels through which the temperature control fluid can flow. Furthermore, the tempering plate 30 can also have connections for connecting to a heating and/or cooling circuit of the motor vehicle. For example, connections for supplying and removing the tempering fluid can be arranged in the container outer wall 71 of the container 70 .

The temperature control plate 30 can also be attached to the outer wall 71 of the container (eg screwed to the outer wall 71 of the container). Merely by way of example, an inner side of the container outer wall 71 can include a plurality of projections, each of which has a blind hole or a through thread. Furthermore, the temperature control plate 30 can have through holes arranged corresponding to the plurality of projections, through which fastening means (eg a screw or a threaded rod) can extend and be screwed into the blind holes or through threads of the projections. The Through-holes in the tempering plate 30 can be arranged on tab-shaped bulges on the edges of the tempering plate 30 .

Furthermore, the electrical energy storage device 10 has a preferably elongate degassing channel 20 . For example, the degassing channel 20 can be designed as a degassing pipe and/or a degassing line. The degassing channel 20 can be flown through along a longitudinal axis of the degassing channel 20 . The degassing channel 20 can be used to discharge gas that has entered the degassing channel (e.g. via the pressure relief valves 12). For this purpose, the degassing channel 20 can fluidly connect the pressure relief valves 12 of the plurality of battery cells 11 to one another.

The degassing channel 20 can be designed to bundle gases escaping from the pressure relief valves 12 into a common volume. The pressure relief valves 12 can open into the degassing channel 20 . The degassing duct 20 is preferably designed to discharge gases escaping from the pressure relief valves 12 (in a targeted manner) from the electrical energy storage device 10 into the environment. In this case, the container outer wall 71 can have at least one passage through which the degassing channel 20 is guided to the outside or via which the degassing channel 20 is connected to the environment. In the passage z. B. a valve may be arranged, which opens when a predetermined pressure in the degassing channel 20 is exceeded.

Furthermore, the degassing channel 20 can be arranged above the pressure relief valves 12 . The degassing channel 20 can also be adapted to the size of the pressure relief valves 12 . In other words, a preferably lateral expansion of the degassing channel 20 can essentially correspond to a preferably lateral expansion of the overpressure valves 12 . In order to advantageously prevent a gas flow (which may also contain particles) in degassing duct 20 from leading to a short circuit in other live components, degassing duct 20 can also be designed in such a way that it is separated from contact poles 13 of the plurality of battery cells 11 is fluidically separated. For this purpose, the degassing channel 20 can have outer boundaries which ensure that the degassing channel 20 is sealed. For example, the degassing channel 20 can be closed or tubular for this purpose and can include openings arranged correspondingly to the pressure relief valves 12 . However, the degassing channel 20 can have an outer boundary (eg, U-shaped) that is designed to be open in the direction of the pressure relief valves 12 . In this case, the limitation can rest on the plurality of battery cells 11 . The electrical energy storage device 10 also includes a thermally conductive device 40. A plurality of the contact poles 13 of the plurality of battery cells 11 are thermally conductively connected to the temperature control plate 30 via the thermally conductive device 40. In other words, a thermally conductive connection can exist between the plurality of contact poles 13 and the tempering plate 30 via the heat conducting device 40 . For this purpose, the heat-conducting device 40 is preferably made of a material that conducts heat well (eg a metal). The heat conducting device 40 can be a separate component from the degassing channel 20 and the tempering plate 30 . As will be described in more detail below, the heat conducting device 40 and the degassing channel 20 (possibly together with the tempering plate 30) can also be designed as a common component.

In all cases, however, the electrical energy storage device 10 is characterized in that the degassing channel 20 and the heat conducting device 40 are arranged between the tempering plate 30 and the battery cell group. The corresponding geometry can also be understood as a “sandwich structure” in which the degassing channel 20 and the heat conducting device 40 are located between the tempering plate 30 and the battery cell group or the multiple battery cells 11 . In order to achieve the best possible thermal connection of the multiple battery cells 11 to the temperature control plate 30 in an advantageous manner, the degassing channel 20 and the heat conducting device 40 can preferably be arranged braced between the temperature control plate 30 and the battery cell group. For example, the corresponding components can be pressed onto the multiple battery cells 11 by the aforementioned screw fastening of the temperature control plate 30 . In this case, this mechanical bracing can advantageously bring about an additional holding down of the plurality of battery cells 11 and thus lead to an additional improvement in the strength of the arrangement.

After the basic arrangement and function of the components of the electrical energy storage device 10 have been described above, the special features of the embodiment shown in FIGS. 1A to 3C will be discussed below. According to this exemplary variant, the degassing channel 20 can be integrated into the heat-conducting device 40 . The degassing channel 20 and the heat-conducting device 40 are therefore preferably not designed as separate components, but rather their functions are combined in a common component. For this purpose, the heat conducting device 40 can have wall sections that delimit the degassing channel 20 at least in sections. For example, the heat conducting device 40 can have a first wall section 41a and a second wall section 41b, which delimit the degassing channel 20 laterally. That is, the degassing channel 20 can be defined laterally by the course of the first and second wall sections 41a, 41b. The first wall section 41a and/or the second wall section can be oriented vertically. The first and second wall sections 41a, 41b can be oriented parallel to one another. The first and second wall sections 41a, 41b can delimit the degassing channel 20 on opposite sides.

Furthermore, the first wall section 41a can have a, preferably upper, first end, which can be connected to the tempering plate 30, preferably integrally in one piece. Furthermore, the first wall section 41a can have a, preferably lower, second end, which is preferably arranged opposite to the first end. The second end of the first wall portion 41a may be connected to the multiple battery cells 11 . For example, the second end can rest on the multiple battery cells 11 and/or be braced against the multiple battery cells 11 .

In a preferred configuration, the second end of the first wall section 41a can be designed to be flexible in order to enable a tight connection of the first wall section 41a to the plurality of battery cells 11 and to compensate for any manufacturing tolerances that may be present. Alternatively, a flexible compensating element (e.g. in the form of a sealing lip) can also be arranged between the second end of the first wall section 41a and the plurality of battery cells 11 . Furthermore, the second wall section 41b—regardless of the design of the first wall section 41a—can also include the features described above in connection with the first wall section 41a. Thus, the second wall section 41b can also have a (upper) first end and a (lower) second end, which can have the aforementioned features.

In addition to delimiting the degassing channel 20 and holding down the multiple battery cells 11 , the heat conducting device 40 can also achieve targeted temperature control of the multiple contact poles 13 of the multiple battery cells 11 . For this purpose, the heat conducting device 40 can also have a first contact bar 42a. The first contact bar 42a can preferably be integrally connected in one piece to the first wall section 41a. For example, the first contact rail 42a can be connected to the first wall section 41a standing perpendicularly on the first wall section 41a. That is, the first wall section 41a can be oriented horizontally or lie in a horizontal plane. Furthermore, the first contact bar 42a can be essentially plate-shaped and/or plane-parallel to the Tempering plate 30 may be arranged. A plurality of the contact poles 13, which are thermally conductively connected to the temperature plate 30 via the heat-conducting device 40, can be (mechanically) connected to the first wall section 41a via the first contact bar 42a. In order to ensure as extensive a contact as possible between the corresponding contact poles 13 and the first contact bar 42a (and to compensate for manufacturing tolerances if necessary), the first contact bar 42a or an end region of the first contact bar 42a facing the corresponding contact poles 13 can be flexible.

Furthermore, the first contact rail 42a can be connected directly to the plurality of contact poles 13, i. H. are in direct contact with the plurality of contact poles 13 (see Figures 3A and 3B). Alternatively, however - such. B. shown in Figure 1 B - further elements between the first contact bar 42a and the plurality of contact poles 13 may be arranged. For example, the electrical energy storage device 10 can include insulation 60 and/or a contacting system 80 . While the multiple battery cells can be electrically connected to one another (e.g. in a series connection) by means of the contacting system 80, the insulation 60 can achieve a galvanic isolation between components, for example if the heat-conducting device 40 or the first wall section 41a consists of an electrically conductive material are made.

Merely by way of example, the contacting system 80 can include a plurality of preferably flat plates, each of which connects one of the contact poles 13 of one of the battery cells 11 to one of the contact poles 13 of a battery cell 11 adjacent thereto. Furthermore, the insulation 60 can comprise several, preferably plate-shaped, insulation elements (e.g. in the form of a flexible gap filler or gap filler), which can be referred to as first insulation elements 61 for better differentiation. The first insulating elements 61 can each be arranged between the first contact bar 42a and one of the aforementioned plates of the contacting system 80 .

In addition or as an alternative to the first contact rail 42a, the heat-conducting device 40 can also have a second contact rail 42b. The second contact rail 42b can preferably be integrally connected in one piece to the second wall section 41b. By way of example only, the second contact bar 42b can be connected to the second wall section 41b standing perpendicularly on the second wall section 41b. The second contact bar 42b can have the features described above in connection with the first contact bar 42a—regardless of the design of the first contact bar 42a. So the second contact bar 42b z. B. horizontally oriented and / or be essentially plate-shaped, it being immediately apparent to the person skilled in the art that the features described in connection with the first contact rail 42a in relation to the first wall section 41a are to be referred to the second wall section 41b in the case of the second contact rail 42b.

In a preferred embodiment, the heat-conducting device 40 (including the degassing channel 20) is designed symmetrically with respect to a longitudinal center plane of the heat-conducting device 40. The longitudinal center plane preferably runs through the pressure relief valves 12. Accordingly, the first contact rail 42a and the second contact rail 42b can be configured identically, e.g. B. have the same dimensions. Furthermore, the first and second contact rails 42a, 42b can be arranged collinear to one another and/or have the same distance from the plurality of battery cells 11 in each case. Furthermore, the first and second contact rails 42a, 42b can each protrude from the heat-conducting device 40 in opposite directions.

In addition to the type of electrical insulation 60 already described above by means of first insulating elements 61 (cf. hatched components in Figure 2B) arranged between the first and/or second contact bar 42a, 42b and the respective contact poles or a contacting system 80, the insulation 60 can also or alternatively also include further insulating elements, which will be described in more detail below with reference to FIGS. 3A to 3C.

According to the variant shown in FIG. 3A, the insulation 60 can have second insulation elements 62 . The second insulating elements 62 can be arranged between the first wall section 41a and the temperature control plate 30 and between the second wall section 41b and the temperature control plate 30 . The second insulating elements 62 or the insulation 60 preferably have the highest possible thermal conductivity in order to ensure the most efficient possible temperature control of the multiple battery cells 11 . An advantage of this variant is that the heat conducting device 40 or the first and second contact rails 42a, 42b can also be used for contacting battery cells 11, so that a (separate) contacting system 80 can be saved if necessary. For this purpose, the first contact bar 42a and/or the second contact bar 42b are/are preferably each directly connected to the plurality of contact poles 13 of the battery cells 11 .

In order to expand the possibilities of interconnecting the multiple battery cells 11 in an advantageous manner, the insulation 60, as shown in FIG. 3B, in addition to the second Insulating elements 62 also include third insulating elements 63 . The third insulating elements 63 can be arranged between the first wall section 41a and the first contact bar 42a and/or between the second wall section 41b and the second contact bar 42b. In order to connect the contact poles 13 to one another selectively (e.g. in pairs), the first and/or second contact bar 42a, 42b can also include a plurality of interruptions (e.g. in the form of slots). In other words, both the first contact bar 42a and the second contact bar 42b can be segmented or have a plurality of sections that are electrically insulated from one another. Overall, a further functionality (contacting) can be integrated into the heat conducting device 40 in an advantageous manner.

FIG. 3C shows another exemplary type of electrical insulation. In addition to the aforesaid second and third insulating elements 62, 63, the insulation 60 can include first insulating elements 61—already mentioned above. In this case, these can be arranged between the first contact bar 42a and the contact poles 13 or between the first contact bar 42a and a contacting system 80 (not shown). In addition or as an alternative, the first insulating elements 61 can also be arranged between the second contact bar 42b and the contact poles 13 or between the second contact bar 42b and a contacting system 80 (not shown).

It has already been mentioned above that, according to the present embodiment, the degassing channel 20 can be integrated into the heat-conducting device 40 . As can be seen in particular from the illustration in FIG. 2B, the temperature control plate 30 can also be designed as a common component together with the heat conducting device 40 (including the degassing channel 20). For example, the temperature control plate 30 and the heat conducting device 40 can be integrally connected to one another in one piece. Alternatively, the corresponding components can also be attached to one another (e.g. screwed) in such a way that the components form a structural (e.g. prefabricated) unit which e.g. B. "quasi as a part" can be placed on the multiple battery cells 11. In this case, the degassing channel 20 can be delimited by the tempering plate 30, preferably at the top. The degassing channel 20 can thus have an essentially rectangular cross section and/or a cuboid volume. Advantageously, a temperature-controlled degassing channel 20 can be provided overall, which in the case of degassing not only allows the gas to be discharged but also allows the gas to be cooled, so that thermal contamination of further battery cells 11 by the hot gas can be avoided or reduced. Furthermore, the electrical energy storage device 10 can have a support plate 50 (cf. FIGS. 4A and 4B). The support plate 50 can be arranged between the temperature control plate 30 and the heat conducting device 40 or between the temperature control plate 30 and the degassing channel 20 . The support plate 50 can be designed with essentially the same area as the temperature control plate 30 . For example, the support plate 50 can be a preferably flat, plate-shaped (e.g. rectangular and/or cuboid) component on which the temperature control plate 30 is supported. That is, the support plate 50 can support the tempering plate 30 . The support plate 50 can stiffen the container 70 and/or absorb and dissipate operational loads. The tempering plate 30 can lie flat against the support plate 50, preferably braced. The support plate 50 can also be arranged plane-parallel to the tempering plate 30 .

A top of the support plate 50 may be shaped to accommodate the temperature control device 30 . For example, the upper side of the support plate 50 can be shaped for positioning or inserting temperature control coils of the temperature control device 30 . Like the tempering plate 30, the support plate 50 can span or cover the entire battery cell group. In addition to absorbing forces and stiffening the electrical energy storage device 10, the support plate 50 can advantageously also serve as a heat shield, e.g. B. to prevent heat from spreading in the electrical energy storage device 10 in the event of a fault and thereby to protect components arranged above it. Preferably, the backing plate 50 is made of a heat resistant material (e.g., steel).

The support plate 50 can be a separate or independent component. In a preferred embodiment, however, the support plate 50 is configured as a common component together with the heat-conducting device 40 and/or the degassing channel 20 . For example, for this purpose the support plate 50 can be formed integrally in one piece with the heat conducting device 40 with an integrated degassing channel 20 (cf. FIG. 4B). That is, the support plate 50 and the heat-conducting device 40 can form a structural unit in which a corresponding degassing channel 20 is provided.

As shown by way of example in FIG. 4B, the degassing duct 20 can be z. B. are delimited laterally by wall sections of the heat conducting device 40 (first and second wall section 41a, 41b) and above by the support plate 50. Here, too, the degassing channel 20 can thus have an essentially rectangular cross section and/or a cuboid volume. Analogous to the cases discussed above in connection with Figures 3A to 3C, the support plate 50 - as previously the tempering plate 30 -from the Heat conducting device 40 and / or the degassing channel 20 may be electrically insulated. Correspondingly, second insulating elements 62 can be arranged between the support plate 50 and the heat-conducting device 40 and/or the degassing channel 20 . Furthermore, further insulating elements (first and third insulating elements 61 , 63 ) can also be arranged on the heat conducting device 40 in the case of the support plate 50 connected to the heat conducting device 40 .

After variants were primarily discussed above, in which at least parts of the components of the electrical energy storage device 10 were integrated into one another or designed as a common component, the following is a separate design of degassing channel 20, temperature control plate 30, heat conducting device 40 and possibly support plate 50 To be received.

For example, the degassing channel 20, such as. B. is shown in Figure 5A to 5C, also be designed as a component separate from the heat conducting device 40. For example, the degassing channel 20 can be delimited by a preferably tubular wall 21 that is not directly connected to the heat-conducting device 40 . The wall can be used as a (closed) hollow profile, e.g. B. be formed with a rectangular cross-section. The wall 21 can delimit the degassing channel 20 in at least four different directions. The wall 21 can comprise openings arranged correspondingly to the overpressure valves 12 . The wall 21 can be directly connected to the plurality of battery cells 11 (eg resting on them). For this purpose, the wall 21 can comprise a first wall section, preferably a lower one, which is connected to the plurality of battery cells 11 . Furthermore, the wall 21 can have a, preferably upper, second wall section, which can be connected directly or indirectly to the tempering plate 30 via a (second) insulating element 62 . Alternatively, the electrical energy storage device 10 can also include a support plate 50 arranged between the degassing channel 20 and the tempering plate 30 . In this case, the (upper) second wall section can be connected to the support plate 50 directly or indirectly via a (second) insulating element 62 .

Furthermore, the heat conducting device 40, such as. B. is shown in Figure 5A and 5B, several, preferably bow-shaped, heat conducting elements 43 include. For example, the heat conducting elements 43 can have a substantially hat-shaped cross section. The heat-conducting elements 43 can each be designed as profile strips. The heat-conducting elements 43 can consist of an electrically conductive material. The heat-conducting elements 43 can each comprise two flat side parts, preferably arranged in one plane, which are connected via a curved, preferably U-shaped, central part can. The side parts and the middle part are preferably connected to one another in an integral, one-piece manner, ie seamlessly throughout. The central parts of the respective heat-conducting elements 43 can be connected to the tempering plate 30 or to a support plate 50 that may be present (possibly via a (second) insulating element 62). The respective side parts can each be connected to a contact pole 13 of different battery cells 11 . For example, the heat conducting elements 43 (made of an electrically conductive material) can electrically connect the plurality of battery cells 11 in pairs. For this purpose, one of the two side parts can be connected to one of the contact poles 13 of a first battery cell of the plurality of battery cells 11, while the respective other side part is connected to one of the contact poles 13 of a second battery cell of the plurality of battery cells 11 adjacent to the first battery cell. In addition to the temperature control of the battery cells 11, the heat conducting elements 43 of the heat conducting device 40 can advantageously also be used to make appropriate contact with the battery cells, so that an additional contacting system 80 can be saved.

FIG. 5C shows an exemplary course of the degassing channel 20 for an exemplary battery cell group. Due to the better representation, the degassing channel 20 is shown here in the variant with its own, preferably tubular, wall 21 (the heat-conducting elements 43 or heat-conducting device 40 is not shown here). However, the corresponding teaching is not limited to this embodiment, but also applies to the other embodiments, e.g. B. the variant with the integrated in the heat conducting device 40 degassing channel 20, transferrable.

The several, preferably identical, battery cells 11 can be arranged as several (e.g. three) battery cell stacks (e.g. with fifteen battery cells 11 each). A number of battery cell stacks and a number of battery cells 11 per battery cell stack can be adapted to the respective requirements in a freely selectable manner. The battery cells 11 of a respective battery cell stack can be clamped together. The battery cells 11 of a battery cell stack are preferably connected to one another in series. The multiple battery cell stacks can each have the same stacking direction. The same stacking direction of the battery cell stack can preferably be horizontal. By way of example only, the battery cells 11 of a battery cell stack can be arranged standing next to one another. The pressure relief valves 12 and/or the contact poles 13 of the battery cells 11 are preferably oriented upwards. The battery cells 11 are preferably prismatic table battery cells 11 . The multiple battery cell stacks can be arranged next to one another. The multiple battery cell stacks are preferably offset perpendicularly to the stacking direction, ie arranged parallel to one another.

The degassing duct 20 can have several (e.g. three) straight duct sections, which can be referred to below as main duct sections. The several straight main channel sections can each be assigned to one of the several battery cell stacks. For example, the multiple straight main channel sections can each be arranged on a side face of one of the multiple battery cell stacks. Furthermore, the plurality of straight main channel sections can be oriented along the same stacking direction. That is, the plurality of straight main channel sections can be arranged parallel to one another. The several straight main channel sections can be fluidically connected to one another via branch channel sections which connect the several straight main channel sections in pairs. The branch channel sections are preferably oriented perpendicular to the straight main channel sections. Preferably, the branch channel sections are fluidly connected to the straight main channel sections in each case at an end region of the latter.

FIG. 6 shows a schematic sectional view of an electrical energy store 100 according to one specific embodiment. In this case, the electrical energy store 100 has a plurality (eg two, three or four) electrical energy store devices 10, as described in this document. The plurality of energy storage devices 10 are preferably of identical design. However, the plurality of energy storage devices 10 can also be designed differently. Furthermore, the electrical energy store 100 can also comprise a plurality of battery cells or a further battery cell group 11′, preferably arranged in one plane. The additional battery cell group 11' is preferably not part of an aforementioned energy storage device 10.

The plurality of electrical energy storage devices 10 are also stacked, preferably aligned with one another. A stacking direction of the energy storage devices 10 is preferably vertical, ie the plurality of energy storage devices 10 can be stacked on top of one another. The plurality of energy storage devices 10 can thus each be arranged in different planes, which are preferably offset plane-parallel to one another. The further battery cell group 1T is preferably also stacked, preferably aligned or aligned with the plurality of energy storage devices 10 . Preferably, the energy storage devices 10 each have a container ter 70 on. The further battery cell group 11′ is preferably also arranged or accommodated in a further container 70′, which is preferably configured identically to the containers 70 of the energy storage devices 10. The containers 70 and the further container 70 ′ are preferably stacked by means of the container outer walls 71 , particularly preferably on end faces of the container outer walls 71 . Accordingly, there can be, for example, a top and a bottom container.

The respective battery cell groups of the plurality of energy storage devices 10 may be electrically connected to each other (across the canisters 70). Furthermore, the respective degassing channels 20 of the plurality of energy storage devices 10 can be fluidically connected to one another (across the containers 70). The respective tempering plates 30 of the plurality of energy storage devices 10 can be connected to one another via a common tempering fluid inflow line and/or a common tempering fluid outflow line. The temperature control fluid inflow line and/or the temperature control fluid outflow line can be arranged outside of the container 70 .

The energy store 100 can have a (top) cover 72 . The cover 72 can cover the uppermost container from above. The cover 72 can be plate-shaped. The cover 72 can be polygonal, preferably rectangular. The cover 72 can preferably be attached to the uppermost container by means of fasteners. Another degassing channel is preferably integrated into the cover 72 . The additional degassing channel can in this case fluidly connect pressure relief valves of the additional battery cells 1T to one another.

The energy store 100 can also have a base 73 . The floor 73 can cover the bottom container from below. The floor 73 can be plate-shaped. The bottom 73 can be polygonal, preferably rectangular. The bottom 73 can be attached to the lowermost container by means of several. A further temperature control plate 30' can be arranged between the floor 73 and a lowermost energy storage device 10. It is possible that a gap filler or gap filler, e.g. B. in the form of a thermal paste that connects the battery cells to the other temperature control plate 30 '.

Although the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents substituted without departing from the scope of the drawings leave invention. Accordingly, the invention should not be limited to the disclosed embodiments, but should include all embodiments falling within the scope of the appended claims. In particular, the invention also claims protection for the subject matter and the features of the subclaims independently of the claims referred to.

Reference List

10 Electrical energy storage device

11 , 1T battery cells

12 relief valve

13 contact pin

20 degassing channel

21 wall

30, 30' tempering plate

40 heat conduction device

41a First section of wall

41b Second section of wall

42a First contact bar

42b Second contact bar

43 heat conducting elements

50 support plate

60 insulation

61 First insulating element

62 Second insulating element

63 Third insulating element

70, 70' container

71 container outer wall

72 cover

73 floor

80 contacting system

100 Electrical Energy Storage

Claims

29 patent claims 1 . Electrical energy storage device (10) for a motor vehicle, preferably a commercial vehicle, comprising: a plurality of battery cells (11), preferably arranged in one plane, each having contact poles (13) and preferably a pressure relief valve (12); a degassing channel (20) which preferably fluidly connects the pressure relief valves (12) of the plurality of battery cells (11) to one another; a temperature control plate (30), preferably through which a temperature control fluid can flow, for temperature control of the plurality of battery cells (11); and a heat conducting device (40) via which several of the contact poles (13) of the several battery cells (11) are thermally conductively connected to the tempering plate (30); wherein the degassing channel (20) and the heat conducting device (40) are arranged, preferably clamped, between the tempering plate (30) and the plurality of battery cells (11). 2. Electrical energy storage device (10) according to claim 1, wherein: the degassing channel (20) is integrated at least in sections in the heat conducting device (40). 3. Electrical energy storage device (10) according to one of the preceding claims, wherein: the heat conducting device (40) has wall sections which delimit the degassing channel (20) at least in sections. 4. Electrical energy storage device (10) according to one of the preceding claims, wherein: the heat conducting device (40) comprises a preferably vertical first wall section (41a) and a second wall section (41b) preferably arranged parallel to the first wall section (41a). ; and the first and second wall sections (41a, 41b) delimit the degassing channel (20) laterally. The electrical energy storage device (10) of claim 4, wherein the thermal conduction device (40): 30 has a first contact rail (42a) which is connected to the first wall section (41a), preferably integrally in one piece, and via the plurality of contact poles (13) which are thermally conductively connected to the temperature control plate (30) via the heat conducting device (40). are connected to the first wall portion (41a); and/or has a second contact bar (42b) which is connected to the second wall section (41b), preferably integrally in one piece, and via which several of the contact poles (13) which are connected to the temperature control plate (30) via the heat conducting device (40) are thermally conductively connected, are connected to the second wall section (41b). Electrical energy storage device (10) according to claim 5, wherein the first contact bar (42a) and the second contact bar (42b): - Protrude in opposite directions from the heat conducting device (40); and or - each have an essentially identical design; and or - are arranged collinear to each other; and or - Are each formed flexible at least in sections. The electrical energy storage device (10) of claim 5 or 6, wherein: the first contact bar (42a) is electrically isolated from the first wall portion (41a); and/or the second contact rail (42b) is electrically insulated from the second wall section (41b). Electrical energy storage device (10) according to one of the preceding claims, wherein: the heat conducting device (40) has at least one electrically conductive section via which a plurality of the contact poles (13) which are thermally conductively connected to the temperature control plate (30) via the heat conducting device (40). are, is electrically contacted; or the heat conducting device (40) is electrically insulated from the plurality of contact poles (13) of the plurality of battery cells (11). Electrical energy storage device (10) according to any one of the preceding claims, wherein the degassing channel (20): is fluidically separated from the contact poles (13) of the plurality of battery cells (11); and or - Is bounded by a preferably tubular wall (21) which has openings arranged correspondingly to the overpressure valves (12); and or - Is designed to be open in the direction of the pressure relief valves (12); and or - Can be tempered by means of the tempering plate (30). Electrical energy storage device (10) according to one of the preceding claims, wherein: the heat conducting device (40) comprises a plurality of, preferably bow-shaped, heat conducting elements (43) which electrically connect the plurality of battery cells (11) to one another in pairs. Electrical energy storage device (10) according to Claim 10, the heat-conducting elements (43) each having: two flat side parts, preferably arranged in one plane; and an arcuate, preferably U-shaped, center portion connecting the two flat side portions, preferably integrally in one piece. Electrical energy storage device (10) according to any one of the preceding claims, wherein: the plurality of battery cells (11) are arranged as at least two battery cell stacks, each having a same stacking direction; and the degassing channel (20) has at least two straight main channel sections, which are each assigned to one of the at least two battery cell stacks and are oriented along the same stacking direction. Electrical energy storage device (10) according to one of the preceding claims, further comprising a support plate (50) of the temperature control plate (30), preferably with substantially the same area as the temperature control plate (30), the support plate (50) between the temperature control plate (30) and the degassing channel (20) and/or between the tempering plate (30) and the heat conducting device (40). Electrical energy storage device (10) according to claim 13, wherein: the support plate (50) and the heat conducting device (40) are integrally connected in one piece and/or are non-detachably connected. Electrical energy storage device (10) according to any one of the preceding claims, wherein at least two of the following components are designed as a common component: - the degassing channel (20); - the tempering plate (30); - The heat conducting device (40); - the support plate (50). Electrical energy storage device (10) according to one of the preceding claims, wherein: the degassing channel (20) is limited by the plurality of battery cells (11), the heat conducting device (40), the temperature control plate (30) and/or the support plate (50). Electrical energy storage device (10) according to one of the preceding claims, further comprising: a container (70) in which the plurality of battery cells (11) are accommodated, the container (70) having a frame-shaped, preferably essentially polygonal frame-shaped, container outer wall (71). . Electrical energy store (100) for a motor vehicle, preferably a commercial vehicle, comprising: a plurality of electrical energy store devices (10) according to one of the preceding claims; wherein the plurality of electrical energy storage devices (10) are arranged stacked, preferably one on top of the other. Electrical energy store (100) according to claim 18, wherein: the plurality of electrical energy storage devices (10) are thermally conductively connected to one another and/or are each oriented in the same way. Motor vehicle, preferably commercial vehicle, having at least one electrical energy storage device (10) according to one of Claims 1 to 17 and/or an electrical energy storage device (100) according to Claim 18 or 19.