DE102020128526A1 - Battery tray, traction battery, automotive vehicle, tool for making a monolithic battery tray and method of making a monolithic battery tray - Google Patents

Abstract

The invention relates to a battery shell having at least one fluid channel formed monolithically together with the battery shell, a traction battery having the same battery shell and a motor vehicle having the same battery shell. The invention also relates to a tool for manufacturing this monolithic battery shell and a method for manufacturing the monolithic battery shell.

Description

The invention relates to a battery tray, a traction battery, a motor vehicle, a tool for manufacturing a monolithic battery tray and a method for manufacturing a monolithic battery tray.

A battery, in particular a traction battery for storing energy in a motor vehicle, consists of a large number of components. A battery housing having at least one battery shell has the task, among other things, of fastening and protecting battery modules and other required components.

Battery shells made of plastic are known in various designs in the prior art.

Since the battery modules give off heat during charging and/or discharging and a particularly low temperature can damage a battery module or be detrimental to the efficiency of the chemical reaction in the battery module, one or more battery temperature control elements are usually also arranged in the battery housing and are set up for this purpose , to absorb the heat of the battery modules and to transport it out of the housing or to supply the battery modules with heat. In particular, battery temperature control elements are known in the form of a heat exchanger, which is designed to have a heat transfer medium flow through it.

Battery shells with a designated temperature control circuit are known in the prior art, which have two double nipples as a separate assembly next to the battery shell or even as individual separate components on at least one side wall of the battery shell.

The double nipples are set up in such a way that a temperature control device can be connected to the outside of the battery shell and a battery temperature control element can be connected to the inside, so that the double nipples enable fluid exchange, in particular an exchange of a heat transfer medium, between the outside and the inside of the battery shell.

A disadvantage of the solution known from the prior art is that the double nipples have to be integrated into at least one side wall of the battery shell. For this purpose, battery shells known in the prior art have a recess in the at least one side wall of the battery shell, which has to be sealed again by installing the at least two double nipples, so that proper use of a designated traction battery having such a battery shell can be ensured.

In this regard, leaking problems at the connection between the double nipple and the battery shell are known in the prior art.

Furthermore, it is known that the double nipples known in the prior art require a comparatively large amount of space.

Another disadvantage of the known prior art is that the position of the double nipple can vary as a result of the comparatively high shape and position tolerances in the method for attaching and aligning the double nipple, which causes problems with the connection of a temperature control device on the outside of the battery shell and/or or problems with the connection of a battery temperature control element on the inside of the battery tray. In addition, this can lead to conflicts with the space requirements of adjacent components and/or systems in a motor vehicle comparatively densely populated with systems and components and also within the designated tightly packed battery tray, in particular between a battery module and a temperature control circuit line inside the battery tray.

The object of the invention is to provide an improvement or an alternative to the prior art.

According to a first aspect of the invention, the task is solved by a battery tray, in particular a battery tray of a traction battery, the battery tray being molded from plastic, the battery tray having a base and at least four side walls, the battery tray having an inside and an outside, the battery tray a first fluid channel and a second fluid channel, wherein the first fluid channel and the second fluid channel extend through the battery tray, wherein the first and/or the second fluid channel is monolithically formed with the battery tray.

• Zunächst sei ausdrücklich darauf hingewiesen, dass im Rahmen der hier vorliegenden Patentanmeldung unbestimmte Artikel und Zahlenangaben wie „ein“, „zwei“ usw. im Regelfall als „mindestens“-Angaben zu verstehen sein sollen, also als „mindestens ein...“, „mindestens zwei ...“ usw., sofern sich nicht aus dem jeweiligen Kontext ausdrücklich ergibt oder es für den Fachmann offensichtlich oder technisch zwingend ist, dass dort nur „genau ein ...“, „genau zwei ...“ usw. gemeint sein können.

The following is explained conceptually:

• First of all, it should be expressly pointed out that in the context of the present patent application, indefinite articles and numbers such as "one", "two" etc. should generally be understood as "at least" information, i.e. as "at least one...", "at least two ..." etc., unless it is expressly stated in the respective context or it is obvious or technically imperative for the person skilled in the art that only "exactly one ...", "exactly two ..." etc. can be meant.

In the context of the present patent application, the expression “in particular” is always to be understood in such a way that an optional, preferred feature is introduced with this expression. The expression is not to be construed as "namely" or "namely".

A “traction battery” is understood to mean an energy storage device, in particular an energy storage device for electrical power. A traction battery is preferably suitable for installation in and for driving electric cars. A traction battery is preferably suitable for use in a battery-electric motor vehicle and/or a motor vehicle with a battery-electric drive and internal combustion engine.

A “plastic” is a material that mainly consists of macromolecules.

A plastic is preferably a thermoplastic, with a thermoplastic being able to be deformed in a material-dependent temperature range, with this process being reversible and being able to be repeated as often as desired by cooling and reheating to the molten state.

A “battery shell” is understood to mean a housing component of a battery, in particular a traction battery.

In particular, a battery shell is set up to accommodate components of a battery and accordingly has a receiving space for accommodating components so that they can be protected from external influences by the battery shell and/or at least indirectly secured in the battery shell.

A battery shell is preferably understood to mean a lower battery shell or an upper battery shell, with the lower battery shell and upper battery shell preferably together forming the essential components of the housing of a traction battery.

In particular, a battery shell has a “bottom” and, preferably in the case of a traction battery with a substantially rectangular outline, at least four “side walls”.

The bottom and side walls of the battery tray form the capacity of a battery tray, with the capacity of the battery tray describing the "inside" of the battery tray.

Based on the capacity of the battery tray, the “outside” of the battery tray is on the side of the floor and side walls that faces away from the capacity.

A “fluid channel” is understood to mean a free cross-section extending in a longitudinal direction of the fluid channel, which is delimited circumferentially by a channel wall in the direction of extension of the fluid channel, with a fluid channel opening into the surroundings of the channel at the beginning and at the end of its longitudinal extent. In other words, a fluid passage is a cavity formed in the battery tray.

A fluid channel preferably has an elongate extent, with a length of the fluid channel being greater than a diameter of the fluid channel.

In the case of a plurality of fluid channels, a “first fluid channel” refers to a first fluid channel which, in particular, differs from a “second fluid channel”.

A fluid channel that "extends through the battery tray" is understood to mean a fluid channel that extends through at least one side wall and/or the bottom of the battery tray, so that the start or end of the longitudinal extent of the fluid channel is on the inside of the battery tray and the deviating opening of the fluid channel opens out on the outside of the battery shell.

It is expressly pointed out that the number of fluid channels according to this aspect of the invention is not limited to two fluid channels, but can be transferred analogously to a number of more than two fluid channels.

In particular, it is also conceivable that further fluid channels are used for a different designated medium.

Specifically, it should be considered in particular that a designated traction battery having a battery shell according to the first aspect of the invention has a first fluid channel and a second fluid channel, the first fluid channel being set up as a feed with a designated heat transfer medium for at least one battery temperature control element on the inside of the battery shell, wherein the second fluid channel is set up as a return with the designated heat transfer medium for at least one battery temperature control element on the inside of the battery shell, so that the designated heat transfer medium flows into the interior of the battery shell by means of the first fluid channel and designated by means of the second fluid channel flows out of the interior of the battery tray again.

A “monolithic” battery shell is understood to mean a battery shell that is manufactured in a single, seamless component.

In other words, a monolithically shaped battery shell is not composed of a plurality of individual parts and is also not joined in a materially bonded manner from a plurality of individual parts, for example by means of a welding process. Rather, a monolithically shaped battery shell is seamless.

A monolithically shaped battery shell is preferably understood to mean a battery shell falling from a tool.

A mold-dropping battery shell is understood to mean a battery shell that is produced in one step using a tool.

A battery shell is now proposed here, the first and/or second fluid channel of which is formed monolithically with the battery shell.

In this way, advantageously better and in particular also reproducible shape and position tolerances can be achieved for the first and/or second fluid channel, as a result of which the dimensional accuracy of the openings of the first and/or second fluid channel can advantageously be improved. In this way, any conflicts resulting from poor shape and position tolerances with designated systems and/or components adjoining the first and/or the second fluid channel can be avoided.

Furthermore, the battery shell proposed here creates a seamless transition between the battery shell and the first and/or second fluid channel extending through the battery shell, which advantageously makes it possible to avoid subsequent sealing of an area of the battery shell that had to be sealed in the prior art. This can in particular increase the availability of the battery tray by avoiding any problem area for the tightness of the battery tray.

Advantageously, in the production of a battery shell having a first and/or a second fluid channel, a separate method step of attaching the double nipples, which is required in the prior art, and thus time and money can be saved.

As a further advantageous effect, the first and/or second fluid channel that is formed monolithically with the battery shell means that less installation space is required compared to the double nipple used in the prior art, in particular since a double nipple requires additional installation space on its shaft for attachment to and sealing with respect to the Battery tray required. This can also advantageously save material and thus money and weight.

According to an alternative first aspect of the invention, other solutions are also conceivable.

As an alternative, the task is also solved in particular by a battery tray, in particular a battery tray of a traction battery, the battery tray being formed from plastic, the battery tray having a base and at least four side walls, the battery tray having an inside and an outside, the battery tray having a first Having a fluid channel and a second fluid channel, wherein the first fluid channel and the second fluid channel extend through the battery tray.

Preferably, the first and/or the second fluid channel is connected to the battery shell in a material-to-material and/or form-fitting and/or non-positive manner, in particular to at least one side wall of the battery shell.

It goes without saying that the risk of leakage from the battery shell and the installation space requirement compared to a double nipple can also be advantageously reduced by the alternative first aspect of the invention. Furthermore, the positioning precision can advantageously be increased compared to the double nipples known in the prior art.

According to an expedient embodiment, the battery shell is manufactured using an injection molding process or a pressing process.

• Unter einem „Spritzgießverfahren“ wird ein Urformverfahren verstanden, wobei der zu verarbeitende Werkstoff, insbesondere Kunststoff, mittels einer Spritzgießmaschine verflüssigt und in eine Form, dem Spritzgießwerkzeug, unter Druck eingespritzt wird. In dem Spritzgusswerkzeug geht der Werkstoff durch Abkühlung und/oder eine Vernetzungsreaktion wieder in den festen Zustand über und kann nach dem Öffnen des Spritzgießwerkzeugs als Bauteil entnommen werden.

The following is explained conceptually:

• An "injection molding process" is understood to mean a primary shaping process, in which the material to be processed, in particular plastic, is liquefied by means of an injection molding machine and injected under pressure into a mold, the injection mold. In the injection mold, the material returns to its solid state as a result of cooling and/or a cross-linking reaction and can be removed as a component after opening the injection mold.

A "pressing process" is understood to be a primary form process in which the form mass is introduced into the cavity of an associated pressing tool in a first step, the pressing tool being closed in a second step, in particular using a pressure piston. By closing the pressing tool, the molding compound acquires the shape specified by the pressing tool. The pressing tool is preferably temperature-controlled.

In the case of a “molding compound”, a thermoplastic or a duroplastic material is to be thought of in particular, to which a fiber material, in particular glass fiber, carbon fiber, aramid fiber or the like, may be mixed.

In particular, a pressing process can also be understood as a direct compounding process (D-LFT), in which a fiber material is fed into an extruder, impregnated there with the already melted matrix polymer, in particular a thermoplastic or a duroplastic, and transferred to an injection piston and is then introduced into the pressing tool as a molding compound.

The molding compound preferably has fibers up to a length of 5 mm.

Advantageously, it can be achieved in this way that an established manufacturing method for a battery shell according to claim 1 can be used, as a result of which costs can be saved and the process risk of the manufacturing process can be minimized.

According to an optional embodiment, the battery shell has on the outside at least one outer stiffening means formed monolithically with the battery shell, in particular at least one outer stiffening means extending in a longitudinal direction of the battery shell, in particular at least one outer stiffening means having two straps, in particular at least one outer stiffening means having two Straps which are at least indirectly spaced apart from one another by a spacer element, in particular a web.

• Unter einem „äußeren Versteifungsmittel“ wird eine geometrische Ausgestaltung der Batterieschale auf der Außenseite der Batterieschale und/oder eine stoffliche Veränderung der Batterieschale verstanden, welche dazu eingerichtet ist, die Batterieschale zu versteifen.

The following is explained conceptually:

• An “external stiffening means” is understood to mean a geometric configuration of the battery shell on the outside of the battery shell and/or a material change in the battery shell, which is set up to stiffen the battery shell.

An outer stiffening means is preferably set up to stiffen the bottom of the battery tray and/or at least one side wall of the battery tray.

An external stiffening means is preferably a profiling of at least one side wall of the battery shell, with the profiling of the at least one profiled side wall of the battery shell having at least one area moment of inertia of the at least one profiled side wall of the battery shell, particularly preferably two area moments of inertia of the at least one profiled side wall of the battery shell a side wall of a battery shell without profiling and with a comparable wall thickness and comparable material composition.

A profiling is preferably an I-profile, a U-profile, a T-profile, a Z-profile, an L-profile or a different profiling.

It should be expressly pointed out that profiling can be understood to mean any geometric change compared to a planar extension of at least one side wall and/or the bottom of the battery shell.

An outer stiffening means is preferably intended to involve a material change in at least one side wall of the battery shell, with the material change in the at least one materially changed side wall of the battery shell having at least one geometrical moment of inertia of the at least one materially changed side wall of the battery shell, particularly preferably two geometrical moments of inertia of the at least one materially changed Side wall of the battery tray, increased compared to a side wall of a battery tray without profiling and with a comparable wall thickness and comparable profiling.

In the case of a material change to achieve an external stiffening means, the addition of fiber material in at least one wall and/or the bottom of the battery shell should be considered in particular, with the fiber material being arranged in such a way that there is at least one area moment of inertia, preferably two area moments of inertia, of the at least one side wall and/or the bottom of the battery tray.

It should be expressly pointed out that the aspect of an external stiffening means presented here is not limited to a stiffening of a side wall of the battery shell, but that two or more side walls of the battery shell, preferably all side walls of the battery shell, can have an external stiffener.

Furthermore, it should be expressly pointed out that an outer stiffening means can also be set up alternatively and analogously to at least one side wall to secure the bottom of a batten to stiffen rie bowl, in particular by means of profiling of the floor and / or a material change in the floor.

A battery tray can have a square base. In this case, a “longitudinal direction” of the battery shell is meant to be a direction along a side wall of the battery shell.

If the battery shell has a base that is rectangular or otherwise deviates from a square base, the longitudinal direction is understood to mean the direction in which the at least one side wall of the battery shell extends, which has the longest extent.

In particular, the direction of longitudinal extent is parallel to the bottom of the battery tray.

A "belt" is understood to be a band of an extending profiling geometry. In particular, belts are understood to mean the bands of an extending profile geometry, which are kept at a distance by a spacer element, in particular a continuous web, and are thus set up to increase at least one area moment of inertia of an extending profile geometry.

A belt is preferably understood to mean the side wall of the battery shell. Here it is specifically considered that the side wall, which forms a chord of the outer stiffening element, is adjoined by a spacer element, which merges into a further chord.

A “spacer element” is understood to mean any geometry that is set up to keep two belts that extend essentially in a common direction at a distance from one another.

A spacer element is preferably understood to mean a web. A “web” is understood to be a flat connection between two straps, preferably between a strap in the form of a side wall of the battery shell and a strap that corresponds to this.

Furthermore, an outer stiffening element in the form of a collar on the side wall of the battery shell should preferably be considered, with the collar being used to increase at least one moment of inertia of the area of at least one side wall of the battery shell, particularly preferably to increase two moments of area of inertia of the at least one side wall of the battery shell, compared to a side wall a battery shell without a collar and with a comparable wall thickness and comparable material composition.

The rigidity of the battery shell can advantageously be increased by the outer stiffening element. In particular, an outer stiffening element additionally enables particularly effective protection against loads acting from the outside on the battery tray, in particular against loads that may occur in the event of a traffic accident and can lead to deformation of the designated motor vehicle having the battery tray. In addition, an outer stiffening element advantageously offers an additional deformation zone in the area of the stiffening element, which can absorb energy from external loads by deforming the outer stiffening element before they act on the designated components and systems inside the battery shell.

Since the external stiffening means proposed here is formed monolithically with the battery shell, this advantageously only results in low additional production costs and high reproducibility.

Furthermore, the monolithic formation can prevent any defects from occurring when a separately formed outer stiffening element and a battery shell are connected.

According to a preferred embodiment, the battery shell has on the inside at least one inner stiffening means formed monolithically with the battery shell, in particular at least one inner stiffening means extending in a transverse direction of the battery shell, in particular a frame extending in the transverse direction and/or longitudinal direction.

• Unter einem „inneren Versteifungsmittel“ wird eine geometrische Ausgestaltung der Batterieschale auf der Innenseite der Batterieschale verstanden, welche dazu eingerichtet ist, die Batterieschale zu versteifen.

The following is explained conceptually:

• An “inner stiffening means” is understood to mean a geometric design of the battery shell on the inside of the battery shell, which is set up to stiffen the battery shell.

An internal stiffening means is preferably a frame. A frame is understood to mean a geometry exhibited in the interior of the battery shell, which is set up to stiffen the battery shell.

A frame is preferably a longitudinal frame, with a longitudinal frame extending in the longitudinal direction of the battery shell and being set up for this purpose at least one area moment of inertia, particularly preferably two area moments of inertia, of a cross section running normal to the longitudinal direction Increase battery tray so that the battery tray is stiffened.

One frame is preferably a transverse frame, with a transverse frame extending in the transverse direction of the battery shell and being set up to increase at least one area moment of inertia, particularly preferably two area moments of inertia, of a cross section of the battery shell running normal to the transverse direction, so that the battery shell is reinforced.

A frame is preferably arranged in such a way that it is set up as a spatial separation between two designated adjacent battery cells and/or battery modules.

An inner stiffening means preferably has a material change, at least in some areas, compared to the battery shell.

A battery tray can have a square base. In this case, a “transverse direction” of the battery tray is intended to mean a direction along a side wall of the battery tray.

If the battery shell has a base that is rectangular or otherwise deviates from a square base, the transverse direction is understood to mean the direction of extension across the at least one side wall of the battery shell, which has the longest extent.

In particular, the direction of transverse extension is parallel to the bottom of the battery tray.

The internal stiffening means proposed here, which are formed monolithically with the battery shell, can advantageously be used to stiffen the battery shell, which advantageously makes it possible to reduce the wall thickness of the base and/or at least one side wall compared to a conventional battery shell with the same stiffness values. As a result, material and thus costs and weight can be saved overall.

It is also conceivable that the inner stiffening means proposed here increases the rigidity compared to a conventional battery shell with a comparable weight, as a result of which the normal deformation of the battery shell can be advantageously reduced during regular operation of the battery, thereby reducing the distance between the systems arranged inside the battery shell and/or components can be reduced.

Furthermore, the inner stiffening means proposed here results in a spatial separation between the systems and/or components arranged in a designated manner on both sides of the inner stiffening means, as a result of which these can advantageously be decoupled. It should be considered in particular that any heat flow between the systems and/or components arranged on both sides of the inner stiffening means can advantageously be reduced by the inner stiffening means.

Since the inner stiffening means proposed here is formed monolithically with the battery shell, this advantageously only results in low additional production costs and high reproducibility of the battery shells produced.

Furthermore, the monolithic formation can prevent any defects from occurring when a separately formed inner stiffening element and a battery shell are connected.

According to a particularly preferred embodiment, at least one inner stiffening means has a core, in particular a structured core, in the middle of two cover layers delimiting the core, in particular a structured core having a cross-rib structure.

• Vorzugsweise weist ein inneres Versteifungselement, vorzugsweise ein Spant, eine Sandwichbauweise auf. Unter einer „Sandwichbauweise“ wird eine bereichsweise Kombination unterschiedlicher Geometrien und/oder stofflicher Beschaffenheit verstanden, sodass die verschiedenen Bereiche unterschiedliche Materialeigenschaften aufweisen.

The following is explained conceptually:

• An inner stiffening element, preferably a frame, preferably has a sandwich construction. A "sandwich construction" is understood to mean a combination of different geometries and/or material properties in certain areas, so that the different areas have different material properties.

In particular, a sandwich construction means a planar construction or an essentially planar construction of a stiffening means, the sandwich construction having a core which is bordered by two cover layers directly adjacent to the core.

A “core” can be described as having a lower specific weight than the skin layers. A core preferably has a particularly high stability with respect to transverse contraction, in particular with respect to transverse contraction caused by bending of the stiffening means.

A core preferably has a geometry that differs from that of the cover layers, by means of which the specific properties of the core can be advantageously achieved.

A core preferably has a material composition that differs from that of the cover layers, by means of which the specific properties of the core can advantageously be achieved.

The core preferably comprises a porous material.

The core is preferably made of wood, in particular balsa wood.

The core is preferably made of aluminum, in particular an aluminum honeycomb or an aluminum foam.

A “structured core” is understood to mean both a core with a geometry that differs from that of the cover layers and a core with a material composition that differs from that of the cover layers, with a structured core having a structure.

A “cross-ribbed structure” is understood to mean a geometry of a core, the core having ribs whose respective ends preferably form the node points of the ribbed structure.

A cross-ribbed structure is preferably set up to divert the compressive and/or shearing forces occurring in a ken into the delimiting cover layers.

Ribs are preferably formed flat or essentially flat.

Preferably, adjacent ribs each share only one common node.

A cross-ribbed structure preferably has a zigzag pattern.

Cross ribs preferably cross like the diagonals in a rectangle.

A “top layer” is understood to mean a layer of material which delimits a core of a stiffening means in a sandwich construction.

A cover layer preferably has a material change compared to the material of the battery shell, preferably in the form of fiber material introduced into the cover layer, which is preferably set up to increase the rigidity of the cover layer in a direction of extension of the cover layer.

The inner stiffening means proposed here in a sandwich construction advantageously enables a lightweight construction of an inner stiffening means. Thus, with the same rigidity, weight and material can be saved compared to an inner stiffening means without a sandwich construction. Alternatively, the stiffness of the inner stiffener can be significantly increased for the same weight.

An inner stiffening means and/or an outer stiffening means, in particular at least one cover layer of an inner stiffening means and/or at least one belt of an outer stiffening means, preferably has a fiber material at least in regions, in particular a fiber material essentially in a main direction of extension of the at least one inner stiffening means and/or fiber material aligned in a main extension direction of the at least one outer stiffening means.

• Unter einem „Fasermaterial“ wird ein Gebilde verstanden, welches aus zumindest einer linearen und elementaren Faser besteht. Hierbei können unterschiedliche Fasern gemeint sein, insbesondere eine Glasfaser, eine Kohlefaser und/oder eine Aramidfaser.

The following is explained conceptually:

• A "fibrous material" is understood to mean a structure that consists of at least one linear and elementary fiber. This can mean different fibers, in particular a glass fiber, a carbon fiber and/or an aramid fiber.

A fiber material is preferably understood to mean a unidirectional endless fiber. In this context, it should be considered, among other things, that a plurality of unidirectional fibers in a fiber material are arranged largely parallel to one another.

A fiber material is preferably understood to mean a fabric made of unidirectional fibers, in particular a fabric made of unidirectional fibers in which a first fiber and a second fiber intersect in a pattern at an angle of exactly or approximately 90° when viewed onto the fabric surface.

A fiber material is preferably understood as meaning a fleece, a fleece being understood as a structure made of fibers which have been combined in some way to form a fleece and connected to one another in some way.

A fiber material is preferably held in shape by a thermoplastic polymer before it is processed in the battery shell, in particular by a thermoplastic polymer which is also used at least as a designated part of the molding compound of the battery shell, so that there is material compatibility between the fiber material and the molding compound.

Using the fiber material and the molding compound of the designated battery shell, a fiber composite material can advantageously be achieved at least in regions, which consists of reinforcing fibers and a matrix of the molding compound embedding the fibers.

A “main direction of extent” of a stiffening means is understood to mean the direction of longitudinal extent of the stiffening means when the stiffening means is considered in isolation.

Advantageously, the ratio of rigidity to weight of an inner and/or outer stiffening means can be increased through the use of fiber material.

In the case of a material change by means of a fiber material, an addition of fiber material in at least one cover layer of an inner stiffening means and/or at least one belt of an outer stiffening means should be considered in particular.

The first and/or the second fluid channel expediently has a connecting means on the outside of the battery shell, the connecting means being set up for connection to a temperature control device.

• Unter einem „Verbindungsmittel“ wird ein Mittel zum Anschließen/Verbinden einer Temperiereinrichtung mit einem ersten Fluidkanal und/oder einem zweiten Fluidkanal verstanden. Insbesondere ist ein Verbindungsmittel auf der Außenseite der Batterieschale angeordnet.

The following is explained conceptually:

• A “connecting means” is understood to mean a means for connecting/connecting a temperature control device to a first fluid channel and/or a second fluid channel. In particular, a connecting means is arranged on the outside of the battery shell.

A connecting means is preferably set up to produce a detachable connection between a first and/or second fluid channel and a temperature control device.

A connecting means preferably has a sealing means having a sealing effect, so that no leakage occurs at the designated connection of connecting means and temperature control device.

A “temperature control device” is understood to mean a device that is set up to bring about and/or maintain a temperature, in particular a temperature of a battery cell of a traction battery. For this purpose, there is preferably fluid communication between the temperature control device and at least one battery temperature control element, so that a heat transfer medium can be exchanged between the temperature control device and the at least one battery temperature control element.

A temperature control device with the at least one corresponding battery temperature control element is preferably set up to cool and/or heat a battery cell of a traction battery.

A temperature control device is preferably a component of a motor vehicle, with the temperature control device being arranged outside of the receptacle of a battery shell.

A “heat transfer medium” is understood to mean in particular a gaseous and/or liquid substance or a gaseous and/or liquid mixture of substances which can be used to transport heat and/or cold by means of a volume flow of the heat transfer medium.

Advantageously, this means that the battery shell proposed here can be securely connected to a designated temperature control device in a simple manner, so that a heat transfer medium can flow into the receiving space of the battery shell and out of the receiving space of the battery shell by means of the first and/or second fluid channel , whereby a flow of heat can flow into and/or out of the receiving space of the battery tray.

The battery shell preferably has a first connection means on the first fluid channel and a second connection means on the second fluid channel, with the first connection means and the second connection means differing in terms of their geometry, so that confusion when the battery shell is connected to a temperature control device is advantageously not possible .

According to an optional embodiment, the first and/or the second fluid channel extends through an outer stiffening means, in particular parallel to the spacer element, in particular a web, of the outer stiffening means.

The first and/or the second fluid channel preferably extends through an outer stiffening means, in particular through a strap of the outer stiffening means, in particular through a first strap and a second strap of the outer stiffening means.

In this way, it can advantageously be achieved that the connecting means can be arranged outside of an outer stiffening means, as a result of which accessibility during assembly of the battery shell can be improved.

Among other things, it is also specifically conceivable that the first and/or the second fluid channel extends through the side wall of the battery shell and in a connecting means between a first belt, in particular a first belt in the form of the side wall of the battery shell, and a second belt of the outer Stiffening agent opens.

In this way, it can be advantageously achieved that the connecting means is easily accessible on the one hand, so that a temperature control device can be easily connected, and on the other hand is protected by a belt that is further outside, so that any external load that occurs can be absorbed by the belt that is outside. whereby any damage to the lanyard can be prevented in the event of low external loads.

Particularly preferably, the first and/or the second fluid channel has at least one connection means on the inside of the battery shell, in particular at least one connection means, which is set up for connection to at least one battery temperature control element.

• Unter einem „Anschlussmittel“ wird ein Mittel zum Anschließen/Verbinden eines Batterietemperierelements mit einem ersten Fluidkanal und/oder einem zweiten Fluidkanal verstanden. Insbesondere ist ein Anschlussmittel auf der Innenseite der Batterieschale angeordnet.

The following is explained conceptually:

• A “connection means” is understood to mean a means for connecting/connecting a battery temperature control element to a first fluid channel and/or a second fluid channel. In particular, a connection means is arranged on the inside of the battery shell.

A connection means is preferably set up to produce a detachable connection between a fluid channel and a battery temperature control element.

A connection means preferably has a sealing means having a sealing effect, so that no leakage occurs at the designated connection of connection means and battery temperature control element.

A “battery temperature control element” is understood to mean a device that is set up for temperature control, in particular for cooling or heating, of a battery cell and/or a battery module. The temperature control power required by a designated battery cell and/or a designated battery module is preferably provided by means of a designated temperature control device and transported into or out of the battery shell by a heat transfer medium.

The battery temperature control element preferably has an outer surface for at least regional contact with a battery cell or with a battery module of a battery module unit having at least two battery cells, an interior space enclosed at least in regions by the outer surface for receiving a heat transfer medium, a supply line connected to the interior space, and a return line connected to the interior space on.

Each of the first and the second fluid channel preferably has a connection means on the inside.

The connection means proposed here can advantageously ensure that the battery shell proposed here can be securely connected to a designated battery temperature control element in a simple manner, so that a heat transfer medium can flow into the receiving space of the battery shell by means of the first and/or second fluid channel and through the battery temperature control element and the deviated fluid channel can flow out of the receiving space of the battery tray, whereby a flow of heat from outside the battery tray can flow into and out of the battery temperature-control element.

According to a particularly preferred embodiment, a first and a second fluid channel have a plurality of connection means in pairs, so that a plurality of battery temperature control elements can be connected to the first and the second fluid channel. As a result, a parallel connection of a plurality of battery temperature control elements, in particular a plurality of battery temperature control elements corresponding to the number of designated battery cells and/or battery modules in the receiving space of the battery tray and/or the designated traction battery, can be achieved.

The battery shell preferably has a first connection means on the first fluid channel and a second connection means on the second fluid channel, with the first connection means and the second connection means differing in terms of their geometry, in particular differing in the form of a plug and a sleeve, so that confusion with the designated Connection of a battery temperature control element to the battery shell is advantageously not possible.

Optionally, at least one connection means is in the form of a plug connector, in particular in the form of a plug or a sleeve.

• Unter einem „Steckverbinder“ wird eine bewegliche und korrespondierende Verbindung von zwei Fluidkanälen verstanden, welche gefügt und erneut gelöst werden kann.

The following is explained conceptually:

• A "connector" is a movable and corresponding connection of two fluid channels understood, which can be added and released again.

Preferably, a mutually corresponding combination of plug and socket in the form of a plug connector, the combination of plug and socket being set up for connecting two fluid channels, has a sealing means with a sealing effect.

A "plug" is understood to mean a geometry that is designed as a male counterpart to a female sleeve. A plug is configured to be inserted into a corresponding socket such that the plug and socket are in fluid communication with each other.

In other words, a mating connector has a male connector and a female connector.

A “socket” is understood to mean a geometry that is designed as a female counterpart to a male-shaped plug. A sleeve is configured to receive a mating plug such that the plug and sleeve are in fluid communication with each other.

All in all, a connection means can be advantageously achieved which is unmistakably and accurately matched to a corresponding means for connecting two fluid channels, in particular for connecting connection means and a flow or a return of a battery temperature control element to the battery shell.

It should be expressly pointed out that a connecting means can also advantageously have the form of a plug connector, in particular in the form of a plug or a sleeve.

According to a particularly expedient embodiment, a connector has an undercut.

• Unter einem „Hinterschnitt“ wird ein Teil der Geometrie des Steckverbinders verstanden, welcher dadurch beschrieben werden kann, dass eine Erstreckungsrichtung des Steckers, insbesondere eine Erstreckungsrichtung quer zu der Längserstreckungsrichtung des Steckers, in dem Bereich des Hinterschnitts einen kleineren Erstreckungswert aufweist als die beiderseits an den Hinterschnitt angrenzenden Bereiche der Geometrie.

The following is explained conceptually:

• An "undercut" is understood to mean a part of the geometry of the connector, which can be described by the fact that a direction of extension of the connector, in particular a direction of extension transverse to the direction of longitudinal extension of the connector, in the area of the undercut has a smaller extension value than that on both sides of the Undercut adjacent areas of geometry.

A form-fitting connection between the connector and a designated temperature control device or a designated battery temperature control element can advantageously be achieved by means of an undercut of the connector.

The first and/or the second fluid channel is/are preferably formed at least in regions using a fluid injection method.

• Unter einem „Fluidinjektionsverfahren“ wird ein Verfahren zur Herstellung von Werkstücken verstanden, die zumindest in einem Teilbereich des Werkstücks hohl ausgeformt sind, insbesondere zur Herstellung einer Batterieschale gemäß dem ersten Aspekt der Erfindung, wobei sich der erste und der zweite Fluidkanal durch die Batterieschale erstrecken und somit hohl innerhalb der Batterieschale ausgeformt sind.

The following is explained conceptually:

• A "fluid injection method" is understood to mean a method for producing workpieces that are hollow at least in a partial area of the workpiece, in particular for producing a battery shell according to the first aspect of the invention, the first and the second fluid channel extending through the battery shell and are thus formed hollow within the battery tray.

After a production step in which an article cavity is filled with a “molding compound”, in particular a molten plastic, a temporary filler, in particular a “fluid”, is injected by means of an “injection device” into an area of the workpiece to be produced that adjoins the designated cavity of the workpiece to be produced or is located in the designated cavity, in particular adjoins the first and/or second fluid channel of the battery shell.

Water and/or an inert gas, in particular nitrogen, can be used, inter alia, as a filler. The filler is preferably injected at a pressure of about 200 bar.

The injected filler displaces a molten core, as a result of which the cavity, in particular the first and/or the second fluid channel, can be shaped.

In the tool, the molding compound cools from the outside inwards and forms a crystallization boundary between an already solidified or partially solidified edge area and the molten core, so that the molten core displaced by the temporary filler lies inside the workpiece and has a thickness that is in an operative connection with the cooling time of the molding compound and the temperature of the tool.

The temporary filler advantageously presses the already crystallized or partially crystallized edge areas of the workpiece against the tool wall, in particular the article cavity, so that the shape and position tolerances of the workpiece, in particular the battery shell, can be achieved advantageously and reproducibly.

Preferably, the injection device comprises a projectile carrier arranged to carry a projectile which can be propelled through the workpiece to be produced when injecting the filler from the temporary filler when forming the cavity as a boundary between the molten core and the filler.

After the remaining molding composition has solidified, the filler can escape again from the workpiece to be produced, in particular when the workpiece is removed from the mold.

In this way, it can preferably be achieved that the first and/or the second fluid channel does not have to be formed with a core within the tool. As a result, the costs for the tool required in a designated manner can advantageously be reduced.

Furthermore, a more complex course of the first and/or second fluid channel can be formed using the fluid injection method, so the course of the first and/or second fluid channel can also have curvatures and/or changes in direction, which advantageously increases the design freedom of the battery shell.

According to a particularly preferred embodiment, the first and/or the second fluid channel extends at least in regions through the bottom of the battery shell, in particular in regions in a straight line through the bottom of the battery shell.

• Unter einer „bereichsweisen Erstreckung“ eines Fluidkanals „durch den Boden der Batterieschale“ wird verstanden, dass der Fluidkanal sich vorzugsweise nicht über die gesamte Erstreckung des Bodens erstreckt. Insbesondere erstreckt sich ein Fluidkanal nicht so weit durch den Boden einer Batterieschale, dass er ausgehend von einem auf der Außenseite der Batterieschale mündenden Ende des Fluidkanals auch noch ein weiteres Ende des Fluidkanals auf der Außenseite der Batterieschale aufweist.

The following is explained conceptually:

• A “partial extension” of a fluid channel “through the bottom of the battery shell” is understood to mean that the fluid channel preferably does not extend over the entire extent of the bottom. In particular, a fluid channel does not extend so far through the bottom of a battery shell that, starting from an end of the fluid channel opening on the outside of the battery shell, it also has a further end of the fluid channel on the outside of the battery shell.

By "straight line" is meant that a fluid channel extends in one direction through the bottom of the battery tray. A fluid channel running in a straight line can have slight deviations from a straight axis. In particular, no fluid channel that meanders or runs with other major changes in direction is to be provided under a fluid channel that runs in a straight line.

In this way it can advantageously be achieved that a fluid channel has only one end on the outside of the battery shell and extends through the bottom of the battery shell into the receiving space of the battery shell.

A fluid channel preferably has a plurality of ends on the inside of the battery shell, each end on the inside preferably being set up for at least indirect connection to a battery temperature control element, so that parallel connection of a plurality of battery temperature control elements is advantageously possible.

In particular, this can ensure that a designated heat transfer medium, which enters the battery shell through a first channel, must exit the battery shell again through a second channel, provided that the ends of the first and second fluid channels inside the battery shell have a corresponding number are fluidly connected to one another by battery temperature control elements.

It is preferably proposed here that a first and/or second fluid channel extends, starting from a side wall, into the bottom of the battery shell. A first and/or second fluid channel can have a purely flat extension, in which it runs at the level of the bottom of the battery shell over the side wall to the outside of the battery shell, or initially in the side wall, following the side wall, downwards in the direction of the Extend soil and then merge into a predominantly horizontal course in the bottom of the battery tray.

A first and/or second fluid channel preferably opens out on the outside in a horizontally extending course, in particular in a horizontally extending connecting means, in particular in a course that runs parallel to the plane formed by the bottom of the battery shell.

According to a particularly preferred embodiment, it is proposed here that a first and/or second fluid channel extends inside the bottom of the battery shell below an inner stiffening means of the battery shell, in particular perpendicular to the longitudinal extent of the inner stiffening means.

Overall, this can advantageously be achieved in that the known in the prior art geometric complexity of a designated traction battery can be reduced, in particular by a first and / or second fluid channel inside the battery shell to the individual Positions of the battery cells and/or battery modules to be temperature-controlled extends, in particular also extends below an inner stiffening means.

It was known in the prior art that a temperature control circuit runs in the form of hoses between the battery cells and/or battery modules. These hoses have also significantly increased the geometric complexity when interacting with other required components, especially in combination with the electrical connection leads. This can advantageously also be achieved in that the packaging time and the assembly time of a designated traction battery can be reduced, in particular since it is no longer necessary for hoses belonging to a temperature control circuit to be cut to length between a double nipple and a battery temperature control element, routed within the battery shell and fastened.

According to an expedient embodiment, it is proposed that a first and/or second fluid channel does not extend through the entire bottom of the battery shell in such a way that it again opens out on the outside of the battery shell.

In this way, it can advantageously be achieved that the first and/or the second fluid channel does not have to be closed and sealed on a second outside of the battery shell. Instead, it is specifically proposed that the first and/or the second fluid channel be formed hollow only to the extent required to reach the last battery cell and/or the last battery module within the battery shell.

It should also be specifically considered that a first and/or second fluid channel in a designated dead water area, in particular in a dead water area considered in the designated flow direction of the heat transfer medium, behind or in front of the last opening of the first and/or second fluid channel inside the battery shell, in the area of the bottom of the battery tray.

The first and/or the second fluid channel expediently extends through the bottom of the battery shell by no less than 10%, preferably no less, based on the maximum extension of the bottom of the battery tray in the direction of the extension of the first and/or the second fluid channel than 20% and more preferably not less than 30%.

The first and/or the second fluid channel preferably extends through the bottom of the battery shell by no less than 40%, preferably no less, based on the maximum extension of the bottom of the battery tray in the direction of the extension of the first and/or the second fluid channel than 50% and more preferably not less than 60%.

The first and/or the second fluid channel preferably extends through the bottom of the battery shell by no less than 70%, preferably by no less, based on the maximum extension of the bottom of the battery tray in the direction of the extension of the first and/or the second fluid channel than 80% and more preferably not less than 90%.

It should be expressly pointed out that the above values for the extent of the first and/or second fluid channel in the bottom of the battery shell should not be understood as sharp limits, but rather should be able to be exceeded or fallen below on an engineering scale without the described aspect of the leave invention. In simple terms, the values should provide an indication of the extent of the first and/or second fluid channel in the bottom of the battery shell.

The first and/or the second fluid channel preferably extends in an edge area of less than 33%, preferably in an edge area of less than 20% and particularly preferably in an edge area of less than 10%, in particular in a left and/or right edge area of the battery shell.

• Unter einem „Randbereich“ werden die Randbereiche der Batterieschale verstanden, insbesondere die Randbereiche des Bodens der Batterieschale, insbesondere ein rechter und ein linker Randbereich, die sich in einer Querrichtung zur Längsachse der Batterieschale ausgehend von den parallel zur Längsrichtung verlaufenden Seitenwänden erstrecken.

The following is explained conceptually:

• An "edge area" is understood to mean the edge areas of the battery tray, in particular the edge areas of the bottom of the battery tray, in particular a right and a left edge area, which extend in a direction transverse to the longitudinal axis of the battery tray, starting from the side walls running parallel to the longitudinal direction.

It is proposed here that a first fluid channel extends through a first edge area, in particular through a right edge area, and a second fluid channel through a second edge area, in particular a left edge area.

According to a second variant, it is proposed that a first and a second fluid channel extend together through an edge area, in particular through a right or left edge area.

According to a third variant, it is proposed that a fluid channel extends in one of the edge areas and a different fluid channel extends outside of both edge areas, in particular in a central area of the battery shell.

This can advantageously be achieved in that a particularly space-saving connection diagram of the at least one battery temperature control element in the receiving space of the battery shell and a particularly space-saving connection diagram on the outside for connecting a temperature control device can be implemented.

Furthermore, a connection scheme inside the battery shell can advantageously be achieved in which the proposed geometric configuration can already prevent the connections from being mixed up when a battery temperature control element is connected as intended. As a result, time can advantageously be saved during the designated installation of the battery temperature control elements.

It should be expressly pointed out that the above values for the position of the first and/or second fluid channel in the edge area of the bottom of the battery shell should not be understood as sharp limits, but rather should be able to be exceeded or fallen below on an engineering scale without the described leave aspect of the invention. In simple terms, the values should provide an indication of the size of the position of the first and/or second fluid channel in the edge area of the bottom of the battery shell.

Optionally, the first and/or the second fluid channel, based on the extent of the battery shell running transversely to the direction in which the first and/or the second fluid channel extends, extends in a central area of less than 33%, preferably in a central area of less than 20% and more preferably in a middle range of less than 10%.

• Unter einem „Mittenbereich“ einer Batterieschale wird der Bereich einer Batterieschale verstanden, welcher zwischen den Randbereichen der Batterieschale angeordnet ist.

The following is explained conceptually:

• A “middle area” of a battery shell is understood to mean the area of a battery shell that is arranged between the edge regions of the battery shell.

In particular, the “middle area” of the battery shell is understood to mean an area which extends transversely to a central longitudinal axis of the battery shell.

According to a first variant, it is proposed here that a first and a second fluid channel extend through the central region of the battery shell.

According to a second variant, it is proposed that a fluid channel extends through the central area of the battery shell, while a different fluid channel extends outside of the central area, in particular in one of the edge regions of the battery shell.

In this way, a connection scheme with a low geometric complexity can advantageously be achieved, in particular with a low geometric complexity in relation to the designated connection of a battery temperature control element.

Furthermore, it can advantageously be achieved that a connection diagram for a temperature control circuit can be achieved, in particular a connection diagram in the interior of the battery shell for the designated connection of one or more battery temperature control elements, with the relevant connection points not being confused for geometric reasons alone.

It should be expressly pointed out that the above values for the position of the first and/or second fluid channel in the central area of the bottom of the battery shell should not be understood as sharp limits, but rather should be able to be exceeded or fallen below on an engineering scale without the described leave aspect of the invention. In simple terms, the values are intended to provide an indication of the size of the position of the first and/or second fluid channel in the center area of the bottom of the battery shell.

According to a particularly preferred embodiment, the first and/or the second fluid channel extends under at least one inner stiffening means.

It is proposed here that at least one fluid channel extends through the bottom of the battery shell below at least one inner stiffening means.

Preferably, the first and second fluid passages extend under an internal stiffening means.

Preferably, at least one fluid channel extends beneath a plurality of internal stiffeners.

A further reduction in the geometric complexity of the battery shell can advantageously be achieved in this way. In particular, a plurality of battery temperature control elements can be designated in this way ments in different areas of the battery shell on both sides of an inner stiffening means are fluidly connected to the first and/or the second fluid channel.

According to an expedient embodiment, the first and/or the second fluid channel extends at least partially through at least one side wall, in particular partially in a direction of extension of at least one side wall of the battery shell.

• Unter einer „Erstreckungsrichtung einer Seitenwand“ wird eine „Längserstreckungsrichtung“ und/oder eine „Quererstreckungsrichtung“ einer Seitenwand verstanden, wobei die Längserstreckungsrichtung und die Quererstreckungsrichtung der Seitenwand in der von der Seitenwand gebildeten Ebene verlaufen.

The following is explained conceptually:

• A “direction of extent of a side wall” is understood to mean a “direction of longitudinal extent” and/or a “direction of transverse extent” of a side wall, with the direction of longitudinal extent and the direction of transverse extent of the side wall running in the plane formed by the side wall.

Thus, among other things, a battery shell is proposed here, which has a first and/or a second fluid channel, with a first and/or a second fluid channel extending at least in regions through at least one side wall. In other words, at least part of a fluid channel runs through at least one side wall.

In this context, it is also specifically considered that a first fluid channel extends through a first side wall and a second fluid channel extends through a second side wall.

Preferably, the second sidewall is opposite the first sidewall of the battery tray.

Preferably, it should also be considered, among other things, that a first and a second fluid channel extend within a single side wall, which has both the first and the second fluid channel.

Preferably, it should also be considered that a first fluid channel and/or a second fluid channel extends through a plurality of side walls. In particular, a fluid channel can merge from a first side wall into a second side wall.

Specifically, it should also be considered that a first fluid channel and/or a second fluid channel extends from the bottom of the battery shell into at least one side wall or vice versa.

Among other things, it is conceivable that a first and/or a second fluid channel extends, starting at a connecting means, into at least one side wall of the battery shell. The side wall of the battery shell preferably has at least one connection means.

Alternatively, it should also be considered that a first and/or a second fluid channel, beginning at a connecting means, extend into at least one side wall of the battery shell and then continue their course through the bottom of the battery shell. The bottom of the battery shell preferably has at least one connection means.

Advantageously, this means that the available space in a battery shell can be used optimally on the one hand and a first and/or a second fluid channel can be integrated into the battery shell on the other hand in such a way that the systems and components inside the battery shell can be optimally reached. Furthermore, it can advantageously be achieved that the connection diagram of one or more designated battery temperature control elements can be designed in an ideally simple and cost-saving manner.

With a fluid channel running within the side wall of a battery tray, it can also be advantageously achieved that the bottom of a battery tray forms a flat surface both on the inside and on the outside of the battery tray, which provides optimal boundary conditions for the arrangement of the battery tray and the arrangement of the systems and/or components within the battery tray.

Optionally, the first fluid channel and/or the second fluid channel extends by no less than 10% of a longitudinal extent of the at least one side wall in the direction of the at least one side wall, preferably by no less than 20% and particularly preferably by no less than 30%.

Preferably, the first and/or the second fluid channel, based on the longitudinal extent of the at least one side wall of the battery shell, extends in the direction of the at least one side wall by no less than 40%, preferably by no less than 50% and particularly preferably by no less than 60% %.

Preferably, the first and/or the second fluid channel, based on the longitudinal extent of the at least one side wall of the battery shell, extends in the direction of the at least one side wall by no less than 70%, preferably by no less than 80% and particularly preferably by no less than 90% %.

It should be expressly pointed out that the above values for the extent of the first and/or second fluid channel in the at least a side wall of the battery tray are not to be understood as sharp boundaries, but rather should be able to be exceeded or fallen below on an engineering scale without departing from the described aspect of the invention. In simple terms, the values should provide an indication of the extent of the first and/or second fluid channel in the at least one side wall of the battery shell.

According to a second aspect of the invention, a traction battery, in particular a traction battery for a motor vehicle, having a battery tray according to the first aspect of the invention solves the problem.

• Unter einem „Kraftfahrzeug“ wird ein durch einen Motor angetriebenes Fahrzeug verstanden. Vorzugsweise ist ein Kraftfahrzeug nicht an eine Schiene gebunden oder zumindest nicht dauerhaft spurgebunden.

The following is explained conceptually:

• A “motor vehicle” means a motor-powered vehicle. A motor vehicle is preferably not tied to a rail or at least not permanently track-bound.

It goes without saying that the advantages of a battery tray according to the first aspect of the invention, as described above, extend directly to a traction battery having a battery tray according to the first aspect of the invention.

According to a particularly preferred embodiment, the traction battery has a battery temperature control element, in particular a battery temperature control element having fluid communication with the first and the second fluid channel.

A traction battery is therefore proposed here which has at least one battery temperature control element. In this context, it should specifically be considered that a feed of the at least one battery temperature control element is fluidly connected to the first or second fluid channel, while a return of the at least one battery temperature control element is connected to the fluid channel that differs from the feed.

In this way, it can advantageously be achieved that the flow and the return of the at least one battery temperature control element are each fluidly connected to a fluid channel, in particular by means of a connection means, the fluid channels extending through the battery shell according to the first aspect of the invention. In this way it can be achieved that the at least one battery temperature control element can be connected to a temperature control device directly from outside the battery shell in a comparatively simple manner, preferably by means of corresponding connecting means which are formed monolithically together with the fluid channels and the entire battery shell.

In this way, the number of connection points in a temperature control circuit of a traction battery can be reduced in a particularly advantageous manner, which means that costs can be saved on the one hand and availability can be increased on the other hand, since the number of connection means and connection means required can be reduced, which also reduces the number of possible leakage points in the temperature control circuit can advantageously be reduced.

This can also facilitate the assembly of the at least one battery temperature control element. Among other things, it is provided that the connection means are arranged within the battery shell in such a way that they can be reached directly with standardized supply lines and return lines of a battery temperature control element without the need for assembly work when connecting the battery temperature control element. This can significantly speed up the assembly of a traction battery.

Furthermore, the architecture of the battery shell proposed here can reduce the geometric complexity in the receiving space of the battery shell. Among other things, it should also be considered that the position of the connection means and the length of the flow line and the length of the return line of the battery temperature control element are adapted for short distances and small necessary changes in direction of a flow line and/or a return line such that the geometric complexity for the temperature control of the traction battery can be advantageously reduced.

It should be expressly noted that this aspect of the invention is not only limited to a traction battery having a battery temperature control element, but that the traction battery can also have a plurality of battery temperature control elements, in particular a plurality of battery temperature control elements corresponding to the number of battery modules that are designated in the battery shell are.

It should preferably be considered that a plurality of battery temperature control elements are each connected to the first fluid channel with their feed, in particular by means of a connection means, and can thus be supplied jointly by means of the first fluid channel with a heat transfer medium from outside the battery shell. Furthermore, it should be considered that the plurality of battery temperature control elements are each connected to the second fluid channel with their return are closed, whereby the heat transfer medium can flow out together through the second fluid channel from the interior of the battery shell.

Preferably, it can be achieved in this way that the plurality of battery temperature control elements are indirectly connected to one another, preferably in a parallel circuit, and a loop for a heat transfer medium through the first and second fluid channel, starting from the outside of the battery shell and continuing through the plurality of battery temperature control elements on the inside of the battery tray and back to the outside of the battery tray. The temperature control device can be connected to the first and the second fluid channel on the outside, as a result of which a fluid connection is created between the temperature control device and each individual battery temperature control element.

It is expressly pointed out that the subject matter of the second aspect can be advantageously combined with the subject matter of the preceding aspect of the invention, both individually or cumulatively in any combination.

According to a third aspect of the invention, the task is solved by a motor vehicle having a battery tray according to the first aspect of the invention.

It goes without saying that the advantages of a battery tray according to the first aspect of the invention, as described above, extend directly to a motor vehicle having a battery tray according to the first aspect of the invention.

It is expressly pointed out that the subject of the third aspect can be advantageously combined with the subjects of the above aspects of the invention, both individually or cumulatively in any combination.

According to a fourth aspect of the invention, the task is solved by a tool for producing a monolithic battery shell made of plastic having a first and/or second fluid channel, in particular a battery shell according to the first aspect of the invention, the tool forming an article cavity, the tool having means for filling having the article cavity with a molding compound made of plastic, the tool having at least one injection device for injecting a fluid into the article cavity.

• Unter einem „Werkzeug“ wird eine Vorrichtung zum Urformen verstanden, insbesondere zum Urformen einer Batterieschale nach dem ersten Aspekt der Erfindung aus einer schmelzflüssigen Formmasse.

The following is explained conceptually:

• A “tool” is understood to mean a device for primary shaping, in particular for primary shaping of a battery shell according to the first aspect of the invention from a molten molding compound.

A tool is preferably understood to mean an injection molding tool.

A tool is preferably understood to mean a pressing tool.

A tool is preferably understood to mean a plunge edge tool.

An “article cavity” is understood to mean the hollow space that is formed by a tool for the area-wise shaping of the component to be produced with the tool, in particular a battery shell.

A “means for filling” is understood to mean a device that is assigned directly or indirectly to the tool and is set up to introduce a molten molding compound into the tool.

A means for filling is preferably understood as meaning a device which is set up to fill the article cavity of the tool and/or the mold cavity of the tool with a molten molding compound.

The area in which the molten molding compound can flow into the tool is preferably arranged within the tool in such a way that it can advantageously resume a backflow of the molding compound through a molten core displaced in the fluid injection process. In this way, a secondary cavity for receiving a displaced molten core can advantageously be dispensed with. Furthermore, it can be achieved that the displaced molten core can preferably be used for a battery shell that is subsequently produced.

Among other things, a tool is proposed here which has at least one injection device or two injection devices, the at least one injection device or the two injection devices being set up to form a first and/or a second fluid channel of a battery shell according to the first aspect of the invention in a hollow manner.

A first injection device is preferably set up to form a first fluid channel in a hollow manner, and a second injection device is set up to form a second fluid channel in a hollow form.

According to a particularly preferred embodiment, the tool has at least one secondary cavity.

• Unter einer „Nebenkavität“ wird eine zusätzliche Kavität verstanden, die neben einer Artikelkavität in einem Werkzeug zum Ausformen einer Batterieschale, insbesondere einer Batterieschale nach dem ersten Aspekt der Erfindung, angeordnet ist.

The following is explained conceptually:

• A “side cavity” is understood to mean an additional cavity that is arranged next to an article cavity in a tool for molding a battery shell, in particular a battery shell according to the first aspect of the invention.

A secondary cavity is preferably at least indirectly fluidly connected to the article cavity.

A secondary cavity is preferably set up to accommodate a molten molding compound, in particular a molten molding compound which is again displaced from the workpiece to be molded by a filler in the injection process.

It is understood that the advantages of a battery tray according to the first aspect of the invention as described above extend directly to a tool for forming a battery tray according to the first aspect of the invention.

The tool preferably has at least one means for clamping a fiber material, in particular a shock-frozen fiber material.

• Unter „Einklemmen“ wird ein Befestigen verstanden, insbesondere ein lösbares Befestigen eines Fasermaterials, insbesondere eines schockgefrosteten Fasermaterials, in einem Werkzeug.

The following is explained conceptually:

• “Clamping” is understood as meaning a fastening, in particular a detachable fastening of a fiber material, in particular a shock-frozen fiber material, in a tool.

In particular, a means for clamping should be considered, which clamps the fiber material as long as it is not completely saturated with the molding compound. The means for clamping proposed here is preferably set up in such a way that it is displaced by the molding compound as soon as the molding compound reaches the means for clamping with the necessary pressure of the molding compound. In this way, it can advantageously be achieved that the means for clamping the fiber material is clamped in for as long as necessary and at the same time is passively displaced by the molding compound in a simple manner.

The injection device expediently has a shaping shaft which forms a mold cavity with the article cavity.

• Unter einem „formgebenden Schaft“ wird ein Bereich einer Injektionsvorrichtung verstanden, insbesondere derjenige Teil der Injektionsvorrichtung, der einen Bereich der designiert mit dem Werkzeug hergestellten Batterieschale durch Kontakt der Formmasse mit dem formgebenden Schaft ausformt.

The following is explained conceptually:

• A “shaping shaft” is understood to mean an area of an injection device, in particular that part of the injection device that shapes an area of the battery shell specifically produced with the tool through contact of the molding compound with the shaping shaft.

A “mold cavity” is understood to be the area between the article cavity, any shaping shaft and any mold core, which is filled/filled with a molding compound in a work step of the fluid injection process. It is expressly pointed out that a mold cavity can also be influenced by a plurality of shaping shafts and/or a plurality of mold cores.

This can advantageously be achieved in that a junction in the first and/or second fluid channel can be formed with a defined geometric precision with regard to its shape and position tolerances. In this way, among other things, better shape and position tolerances can be achieved for a connecting means, as a result of which further options for sealing between the connecting means and the temperature control device can also be made possible.

According to a particularly preferred embodiment, the tool has at least one mold core which is set up to form a structured core in the middle of two cover layers delimiting the core, in particular to form a structured core having a cross-rib structure.

• Unter einem „Formkern“ wird jegliche zumeist gegenüber dem geschlossenen Werkzeug bewegliche Vorrichtung verstanden, insbesondere eine Innenform verstanden, die dazu eingerichtet ist, einen Hohlraum in der designiert von dem Werkzeug herzustellenden Batterieschale auszuformen.

The following is explained conceptually:

• A “mold core” is understood to mean any device that is usually movable relative to the closed tool, in particular an inner mold that is designed to form a cavity in the battery shell that is designated to be produced by the tool.

This advantageously allows the battery shell to have an area with a structured core.

Optionally, the tool has at least one mold core, which is set up to shape a partial area of the fluid channel at least one connection means.

In this way, it can advantageously be achieved that the connection means can be formed at least in regions with a fluid channel, with the fluid channel particularly preferably opening into a first or second fluid channel designed to be hollow.

Among other things, a split mandrel is proposed here, which advantageously the Ausfor tion of an undercut on a connecting means or a connecting means.

According to an optional embodiment, the tool has a tapping tool, with the tapping tool being set up to form a fluid channel between a first or second fluid channel and a connection means.

• Unter einem „Anstichwerkzeug“ wird ein Werkzeug verstanden, mit welchem ein Fluidkanal, insbesondere ein erster und/oder zweiter Fluidkanal, angestochen werden kann, insbesondere durch ein Anschlussmittel, insbesondere durch eine Muffe oder einen Stecker.

The following is explained conceptually:

• A “piercing tool” is understood to mean a tool with which a fluid channel, in particular a first and/or second fluid channel, can be pierced, in particular through a connection means, in particular through a socket or a plug.

A tapping tool is preferably a movable part of the tool.

A piercing tool is preferably one that can be temperature-controlled, in particular heated, in particular by means of ultrasound or by means of a high-frequency generator.

It is proposed here that the tool is set up to form a battery shell according to the first aspect of the invention, with a first region of a fluid channel of a connection means being formed by means of a mold core, with a first and/or second fluid channel being formed using a fluid injection method, wherein the first area of the fluid channel of the connecting means and the first and/or second fluid channel do not meet, and wherein a fluid connection is established between the first area of the fluid channel of the connecting means and the first or the second fluid channel by means of a piercing tool.

In other words, it is proposed here that the molded battery shell initially has no fluid connection between a region of a fluid channel of a connecting means and the first fluid channel of the battery shell and/or the second fluid channel of the battery shell. This fluid connection is brought about by means of the piercing tool after the battery shell has been shaped. On the one hand, this can be done within the mold for demolding and, on the other hand, after the battery shell has been removed from the mold, but in particular after the battery shell has been removed from the mold in the same station.

In this way, a defined transition between a first or a second fluid channel and an opening in a connection means can advantageously be produced.

In this way, in the case of a parallel arrangement of several battery temperature control elements, a defined hydraulic balance between the individual battery temperature control elements can advantageously also be achieved, so that they each experience a comparable designated volume flow of the heat transfer medium.

According to a particularly preferred embodiment, in the case of a plurality of tapping tools in the tool, different tapping tools have different diameters, the diameters preferably and advantageously being set up to bring about hydraulic balancing of the battery temperature control elements.

According to a particularly expedient embodiment, the tool for forming a connection means has a secondary cavity.

It is now proposed here that the tool has a secondary cavity which corresponds to a designated opening of the first or second fluid channel in a connection means and can thus receive at least the molten molding compound displaced from the fluid channel of the connection means.

A corresponding secondary cavity is preferably assigned to each connection means.

A valve is particularly preferably arranged between the at least one secondary cavity and the tool forming the article cavity.

• Unter einem „Ventil“ wird ein Bauteil zur Absperrung oder Steuerung von Fluiden verstanden.

The following is explained conceptually:

• A "valve" is understood to mean a component for shutting off or controlling fluids.

It is proposed here that the at least one secondary cavity is directly or indirectly separated from the mold cavity by a valve.

The valve advantageously allows the pressure acting against the filler in the injection process to be controlled by the valve. If the valve is opened, the pressure acting against the filler in the direction of the valve decreases and at least the molten core located in the corresponding branch of the first or second fluid channel can be discharged from the filler in the direction of the secondary cavity associated with the valve.

This process of propulsion through a branch of the fluid channel and/or the fluid channel can advantageously be interrupted again as soon as the associated valve is closed again.

If only one secondary cavity is assigned to a fluid channel, the length of the extension of the fluid channel can be controlled or regulated.

If a fluid channel is assigned a plurality of secondary cavities, the corresponding branch can be selected by controlling the valves assigned to each secondary cavity and the advance distance of the respective branch of the fluid channel formed by the filler can be controlled or regulated.

It is expressly pointed out that the subject of the fourth aspect can be advantageously combined with the subjects of the above aspects of the invention, both individually or cumulatively in any combination.

1. a) Füllen der Artikelkavität mit einer Formmasse aus Kunststoff;
2. b) Einleiten eines unter Druck stehenden Fluids mittels der Injektionsvorrichtung in die Artikelkavität, wobei ein den ersten und/oder den zweiten Fluidkanal ausformender Teil der Formmasse in eine Nebenkavität verdrängt wird;
3. c) Entformen der monolithischen Batterieschale.

According to a fifth aspect of the invention, the task is solved by a method for producing a monolithic battery shell made of plastic, having a first and/or second fluid channel, in particular a battery shell according to the first aspect of the invention, by means of an injection molding device or a pressing device with a tool forming an article cavity, in particular a tool according to the fourth aspect of the invention, with means for filling the article cavity with a molding compound made of plastic, with at least one injection device for injecting a fluid into the article cavity and with at least one secondary cavity, the manufacturing method comprising the following steps:

1. a) filling the article cavity with a plastic molding compound;
2. b) introducing a pressurized fluid into the article cavity by means of the injection device, with a part of the molding compound forming the first and/or the second fluid channel being displaced into a secondary cavity;
3. c) Demoulding of the monolithic battery shell.

• Unter einem „Füllen“ wird gemäß einer ersten Variante verstanden, dass ein Spritzgießwerkzeug von einem Extruder mittelbar oder unmittelbar, mit einer schmelzflüssigen Formmasse aufgefüllt und ausgefüllt wird.

The following is explained conceptually:

• According to a first variant, “filling” means that an injection mold is filled and filled with a molten molding compound directly or indirectly by an extruder.

According to a second variant, “filling” means that a pressing tool is loaded directly or indirectly with a molding compound from an extruder and the molding compound is then distributed in the article cavity by the stroke of the pressing tool, so that the article cavity is filled with the molding compound.

“Shaping” is understood to mean any shaping of a body by means of which a three-dimensional shaping can be achieved, in particular a three-dimensionally shaped battery shell.

Molding is preferably understood to mean molding by means of an injection molding process.

Molding is preferably understood as meaning molding by means of a compression molding process or an extrusion process. In this case, a molding compound is introduced into a cavity of a die, the die being heated or being heated and/or being cooled. The cavity is then closed using a plunger. The pressure gives the molding compound the shape specified by the cavity and pressure piston.

According to the first aspect of the invention, “demolding” is understood to mean the removal of the battery shell that has been specifically manufactured from the tool.

Here, according to the first variant, a method is proposed in which an injection mold is filled up in a first method step and then a first and/or a second fluid channel is formed in a hollow manner. Finally, the solidified battery shell is removed from the injection mold.

According to a second variant, it is proposed that a pressing tool is loaded with a molding compound and the molding compound is distributed in the pressing tool by the stroke of the pressing tool, filling the pressing tool. Subsequently, the first and/or the second fluid channel are formed hollow by means of an injection method and after the molding compound has solidified, the battery shell is demoulded from the pressing tool.

It will be appreciated that the advantages of a battery tray according to the first aspect of the invention and the advantages of a tool according to the fourth aspect of the invention as described above directly relate to a method of manufacturing a battery tray according to the first aspect of the invention with a tool extend to the fourth aspect of the invention.

According to a particularly preferred embodiment, the tool forming the article cavity is fitted with a fiber material, in particular a shock-frozen fiber material, at least in regions before the article cavity is filled with the plastic molding compound.

As a result, a battery shell having a fiber material can advantageously be produced.

A valve is particularly expediently arranged between the at least one secondary cavity and the tool forming the article cavity, with the displacement of the molding compound into the at least one secondary cavity being controlled by the valve.

It goes without saying that the advantages of a tool according to the fourth aspect of the invention having a valve, as described above, extend to a method with a tool according to the fourth aspect of the invention having a valve.

According to a particularly expedient embodiment, a fluid connection between a first fluid channel or a second fluid channel and a region of a fluid channel of a connecting means is produced by means of a piercing tool after demolding the battery shell or before demolding the battery shell.

According to a first variant, it is proposed here that a fluid connection between a first fluid duct or a second fluid duct and a region of a fluid duct of a connecting means is produced by means of a piercing tool before the battery shell is removed from the mold, in particular on an at least partially crystallized battery shell or one that is already completely crystallized battery tray.

The tapping tool is preferably at the same time a mold core for a region of the fluid channel of the connecting means, the mold core being heated before use as a tapping tool.

The tool preferably contains a mechanism that allows a tapping tool with a mold core for a region of the fluid channel of the connection means to be exchanged when the tool is open or closed, so that the tapping can be carried out correspondingly with the tool open and/or closed.

The tool preferably has a separate tapping tool which, when the tool is open, allows at least one fluid connection to be established between a first fluid channel or a second fluid channel and a region of a fluid channel of at least one connection means. Here, among other things, it should be specifically considered that the fluid connection of several connection means with the first and/or second fluid channel can be established by means of the one tapping tool, in particular also several connection means at different positions of the battery shell.

According to a second variant, it is proposed here that a fluid connection between a first fluid duct or a second fluid duct and a region of a fluid duct of a connecting means is established by means of a piercing tool after the battery shell has been removed from the mold.

The tapping preferably takes place using the tapping tool in the same tool station in which the battery shell is also formed.

It should be considered here that a tapping tool can purposefully produce at least one fluid connection between a first fluid channel or a second fluid channel and a region of a fluid channel of at least one connection means.

It is expressly pointed out that the subject of the fifth aspect can be advantageously combined with the subjects of the above aspects of the invention, both individually or cumulatively in any combination.

• 1: schematisch einen Ausschnitt einer Ausführungsform einer Batterieschale;
• 2: schematisch einen Ausschnitt einer Ausführungsform einer Batterieschale mit einem Batterietemperierelement;
• 3: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Anschlussmittel in einem bereichsweise schematisch dargestellten Werkzeug während der Herstellung der Batterieschale;
• 4: schematisch eine Ausführungsform einer Batterieschale;
• 5: schematisch eine Ausführungsform einer Batterieschale mit einem Anschlussschema für Batterietemperierelemente;
• 6: schematisch eine Ausführungsform einer Batterieschale mit einem Anschlussschema für Batterietemperierelemente;
• 7: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Anschlussmittel in einem bereichsweise schematisch dargestellten Werkzeug;
• 8: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Verbindungsmittel während der Herstellung der Batterieschale;
• 9: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem designierten Verbindungsmittel in einem Werkzeug während der Herstellung der Batterieschale;
• 10: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Verbindungsmittel in einem Werkzeug während der Herstellung der Batterieschale;
• 11: einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale;
• 12: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Verbindungsmittel in einem Werkzeug während der Herstellung der Batterieschale; und
• 13: schematisch einen Detailausschnitt eines Schnittes durch eine Ausführungsform einer Batterieschale mit einem Verbindungsmittel in einem Werkzeug während der Herstellung der Batterieschale.

Further advantages, details and features of the invention result from the exemplary embodiments explained below. Show in detail:

• 1 1: schematically shows a section of an embodiment of a battery shell;
• 2 1: schematically shows a section of an embodiment of a battery shell with a battery temperature control element;
• 3 1: schematically shows a detail of a section through an embodiment of a battery shell with a connection means in a tool that is schematically shown in some areas during the production of the battery shell;
• 4 1: schematically an embodiment of a battery tray;
• 5 1: a schematic of an embodiment of a battery shell with a connection scheme for battery temperature control elements;
• 6 1: a schematic of an embodiment of a battery shell with a connection scheme for battery temperature control elements;
• 7 1: schematically shows a detail of a section through an embodiment of a battery shell with a connection means in a tool that is schematically illustrated in some areas;
• 8th 1: schematically shows a detail of a section through an embodiment of a battery shell with a connecting means during the manufacture of the battery shell;
• 9 1: schematically shows a detail of a section through an embodiment of a battery shell with a designated connection means in a tool during the production of the battery shell;
• 10 1: schematically shows a detail of a section through an embodiment of a battery shell with a connecting means in a tool during the production of the battery shell;
• 11 : a detail of a section through an embodiment of a battery shell;
• 12 1: schematically shows a detail of a section through an embodiment of a battery shell with a connecting means in a tool during the production of the battery shell; and
• 13 1: schematically shows a detail of a section through an embodiment of a battery shell with a connecting means in a tool during the production of the battery shell.

In the description that now follows, the same reference symbols denote the same components or the same features, so that a description of a component given in relation to one figure also applies to the other figures, so that a repeated description is avoided. Furthermore, individual features that have been described in connection with one embodiment can also be used separately in other embodiments.

The detail of one embodiment of a monolithic molded battery tray 100 in 1 has a battery shell 100 consisting of a base 102, at least one side wall 104, an outer stiffening means 130, an inner stiffening means 140 and a first or second fluid channel 110, 120.

The battery tray 100 has an inside 108 and an outside 106 .

The outer stiffening means 130 consists essentially of two straps 132, one of the straps 132 collapsing with the side wall 104 of the battery tray 100, a spacer element 134, which keeps the two straps 132 at a distance from one another even under load and the associated deformation, so that these one provide a significant contribution to at least one area moment of inertia of the battery tray 100.

The outer stiffening element 130 is formed monolithically with the remainder of the battery tray 100 and is thus bonded to the bottom 102 and the side wall 104 of the battery tray 100 .

The outer stiffening element 130 extends in a longitudinal direction 136 of the battery shell 100.

The inner stiffening element 140 consists essentially of two cover layers 144, which are arranged around a core 142, in particular a structured core 142, having a cross-rib structure 146.

The inner stiffening element 140 is formed monolithically with the remainder of the battery tray 100 and is thus bonded to the bottom 102 and the side wall 104 of the battery tray 100 .

For its further stiffening, the inner stiffening element 140 has a fiber material 150 which is shown in the two cover layers 144 of the inner stiffening means 140 .

Fibrous material 150 extends together with inner stiffening means 140 in a transverse direction 148 of battery shell 100.

It should be expressly pointed out that a battery tray 100 with the structure corresponding to the embodiment in 1 is conceivable, which has no fiber material 150.

The first or second fluid channel 110, 120 is formed monolithically with the rest of the battery tray 100 and is thus integrally connected to the bottom 102 and the side wall 104 of the battery tray 100.

The first or second fluid channel 110, 120 extends through the bottom 102 of the battery tray under the internal stiffener 140 therethrough.

The detail of one embodiment of a monolithic molded battery tray 100 in 2 has a battery shell 100 consisting of a base 102, at least one side wall 104, a first fluid channel 110 and a second fluid channel 120.

The battery tray 100 has an inside 108 and an outside 106 .

The base 102 of the battery shell 100 has a profile (not labeled) which is set up to reinforce the base 102 .

The first fluid channel 110 and the second fluid channel 120 are formed monolithically with the rest of the battery tray 100 and are thus integrally connected to the bottom 102 and the side wall 104 of the battery tray 100 .

The first fluid channel 110 and the second fluid channel 120 each have a connection means 170 . A battery temperature control element 180 is connected to the connection means 170 and is set up to control the temperature of a designated battery cell (not shown) and/or a designated battery module (not shown).

The first fluid channel 110 and the second fluid channel 120 can be used to provide a flow and a return for a heat transfer medium (not shown), which flows through the battery temperature control element 180 in a designated manner.

The detailed section of a section through an embodiment of a battery shell 100 with a connection means 170 in a tool 200, shown schematically in some areas, during the production of the battery shell 100 in 3 consists essentially of a region of the bottom 102 of the battery shell 100 having a first fluid channel 110 formed monolithically with the battery shell 100 and a second fluid channel 120 likewise formed monolithically with the battery shell 100.

In the section shown, the first fluid channel 110 has a connection means 170 which is also formed monolithically with the battery shell 100 . The battery tray 100 with the connection means 170 is still in the tool 200, which is only partially shown, in particular in the upper area of the connection means 170.

The connecting means 170 has the form of a plug 172 which has an undercut 176 .

The connection means 170 has a fluid channel 171 inside the connection means 170 which is fluidly connected to the first fluid channel 110 . The fluid channel 171 in the interior of the connecting means 170 is formed using a fluid injection method, just like the first fluid channel 110 and the second fluid channel 120 .

The tool 200 has a multi-part design (not labeled). Immediately adjacent to connection means 170 is a two-part area of tool 200, which can be opened by moving in the opposite direction in the direction of the main extension direction of base 102 of the battery shell, and can thus release molded and solidified connection means 170 in the form of a plug 172. So that the parts of the tool 200 adjoining the connecting means 170 can open, the areas of the tool 200 adjoining these tool parts are first moved upwards with a translatory movement, at least until the areas of the tool 200 adjoining the connecting means 170 are moved laterally are freely movable in the cutting plane.

The parts of the tool 200 adjoining the connecting means 170 have a secondary cavity 250 and a valve 260 in addition to a cavity (not labeled) for the connecting means 170 which merges into the cavity (not labeled) of the battery shell 100 .

The valve 260 is shown schematically and can preferably be in the form of a slide (not shown), which can preferably be designed to be displaceable into the sectional plane.

During the production of the battery shell 100, the cavity (not labeled) of the tool 200 is filled with a molding compound 210 in a first step. In a subsequent method step, the first fluid channel 110, the second fluid channel 120 and the fluid channel 171 of the connection means 170 are formed using a fluid injection method.

While the fluid injection method is being carried out, the first fluid channel 110 is first advanced through the base 102 of the battery shell 100 until it has at least passed the area below the connection means 170 . The valve 260 is then opened in the parts of the tool 200 adjoining the connecting means 170, so that the molding compound 210, which is located in the fluid channel 171 of the connecting means 170 that has not yet been formed, flows along the crystallization boundary of the molding compound 170 into the secondary cavity 250 in can press the parts of the tool 200 adjoining the connecting means 170, as a result of which the fluid channel 172 of the connecting means 170 is formed.

As a result, the fluid channel 171 of the connecting means 170 and the first fluid channel 110 are automatically fluidly connected to one another, since the fluid channel 171 of the connecting means 170 and the first fluid channel 110 are formed from a common temporary filler (not shown) starting from the first fluid channel 110.

Before the fluid channel 171 of the connecting means 170 reaches the valve 260, the valve 260 is closed, as a result of which the propulsion of the fluid channel 171 can be stopped. In parallel, it is conceivable that the first fluid channel 110 is pushed further by the temporary filler (not shown).

After demoulding, the part of the solidified molding compound that is above the connection means 170 and extends as far as the valve 260 is separated along the parting line 178, as a result of which the fully formed connection means 170 in connection with the battery shell 100 remains below the parting line 178.

It should be expressly noted that a connection means (not shown) can also be formed on the second fluid channel 120 by means of the method described above, with a fluid channel (not shown) of the connection means (not shown) adjoining the second fluid channel 120 analogous to FIG a temporary filler (not shown) from the second fluid channel 120 can be formed.

Furthermore, it is expressly pointed out that a first fluid channel 110 and/or a second fluid channel 120 can each also have a plurality of connection means 170 . These are preferably arranged one behind the other when viewed in the direction of a fluid channel 110 , 120 . It goes without saying that a plurality of connection means 170 can also be produced using the above method, with the plurality of valves 260 being opened in parallel or in series to form the plurality of fluid channels 171 in the respective connection means 170 in order to form the fluid channels 171 in the connection means 170 can become.

It goes without saying that the tool 200 can also be arranged kinematically in such a way that the areas of the tool 200 adjoining the connecting means 170 can open into and out of the cutting plane in a lateral movement. In this case, a valve 260 implemented with a spool (not shown) would preferably be configured such that the spool could move in a lateral motion in the plane of the section.

In the 4 The illustrated embodiment of a battery shell 100 consists essentially of a base 102 and four side walls 104 connected to one another, which together with the base 102 delimit an inner side 108 of the battery shell 100 from an outer side 106 of the battery shell 100 .

On the inside of the battery shell 100, the battery shell 100 has a plurality of inner stiffening means 140 in the form of a frame 140 each. The inner stiffening means 140 run in the transverse direction (not shown) of the battery shell 100 between the respective delimiting side walls 104.

The sidewalls 104, floor 102 and internal stiffeners 140 are monolithically formed together.

The battery tray 100 also has a first fluid channel 110 and a second fluid channel 120, which are arranged in a central region 192 of the battery tray.

Schematic is in 4 shown that in the production of the first fluid channel 110 and the second fluid channel 120 by means of a fluid injection method in the corresponding tool (not shown) a respective secondary cavity 250 and a valve 260 are provided.

The secondary cavities 250 are designed to receive the molding compound (not shown) displaced from the respective fluid channel 110 , 120 .

The valves 260 are set up to control and/or regulate the propulsion of the fluid channels 110 , 120 .

In the 5 The embodiment of a battery tray 100 illustrated essentially consists of a base 102 and four side walls 104 connected to one another, which together with the base 102 delimit an inner side 108 of the battery tray 100 from an outer side 106 of the battery tray 100, the battery tray 100 having a plurality of inner stiffening elements 140 , which are monolithically formed with the rest of the battery tray.

The battery tray 100 also has a first fluid channel 110 and a second fluid channel 120, which are arranged in a central region 192 of the battery tray.

A plurality of battery temperature control elements 180 are arranged in the battery shell 100 . In particular, the battery temperature control elements 180 are arranged in a schematic grid (not labeled, each between at least one side wall 104, at least one inner stiffening element 140 and a first fluid channel 110 or a second fluid channel 120.

This advantageously results in an arrangement of first fluid channel 110, second fluid channel 120 and a plurality of battery temperature control elements ments 180, which has a particularly advantageous degree of geometric complexity, in particular a particularly low geometric complexity.

In 5 two variants of a conceivable connection scheme A, B for the battery temperature control elements 180 within the battery shell 100 are shown. A connection diagram A, B is understood to mean a connection of at least one battery temperature control element 180 or a plurality of battery temperature control elements 180 to the first fluid channel 110 and the second fluid channel 120 .

It is provided that a battery element 180 is fluidly connected to the first fluid channel 110 or the second fluid channel 120 by means of a feed (not marked) and to the fluid channel 110, 120 deviating therefrom by a return (not marked).

The connection diagram A requires two connection means 170 for each battery temperature control element 180, a first connection means 170 corresponding to the first fluid channel 110 and a second connection means 170 corresponding to the second fluid channel 120.

According to the connection diagram A, a separate flow (not marked) and a separate return (not marked) are required for each battery temperature control element 180 .

Connection diagram B has a lower geometric complexity than connection diagram A. According to connection diagram B, two preferably opposite battery temperature control elements 180 always share a common flow (not marked) and a common return (not marked), whereby every two battery temperature control elements 180 also share only one connection means 170 corresponding to the first fluid channel 110 and one to the second fluid channel 120 corresponding connection means 170 share.

As a result, the number of connection means 170 can advantageously be reduced.

In the 6 The embodiment of a battery tray 100 illustrated essentially consists of a base 102 and four side walls 104 connected to one another, which together with the base 102 delimit an inner side 108 of the battery tray 100 from an outer side 106 of the battery tray 100, the battery tray 100 having a plurality of inner stiffening elements 140 , which are monolithically formed with the rest of the battery tray.

The battery shell 100 also has a first fluid channel 110 and a second fluid channel 120, which are each arranged in a different edge region 190 of the battery shell.

A plurality of battery temperature control elements 180 are arranged in the battery shell 100 . In particular, the battery temperature control elements 180 are each arranged adjacent to the inner stiffening elements 140 and the first fluid channel 110 and the second fluid channel 120 .

The arrangement of the battery temperature control elements 180 and the first fluid channel 110 and the second fluid channel 120 results in a particularly low geometric complexity of the designated traction battery (not shown), preferably also in comparison to the arrangements 5 .

The detailed section of a section through an embodiment of a battery shell 100 with a connecting means 170 in a tool (not labeled) that is schematically shown in some areas during the production of the battery shell 100 in FIG 7 consists essentially of a region of the base 102 of the battery shell 100 having a first fluid channel 110 formed monolithically with the battery shell 100.

In the section shown, the first fluid channel 110 has a connection means 170 which is also formed monolithically with the battery shell 100 . The battery tray 100 with the connecting means 170 is still in the tool (not labeled), which is only partially shown, in particular in the area of the connecting means 170 .

The connecting means 170 has the form of a plug 172 which has an undercut 176 .

The tool (not designated) is designed in several parts. Immediately adjacent to connection means 170 is a two-part area of the tool (not labeled), which can be opened by moving in the opposite direction in the direction of the main extension direction of base 102 of the battery shell, and can thus release molded and solidified connection means 170 in the form of a plug 172 . So that the parts (not shown) of the tool (not designated) adjoining the connecting means 170 can open, the areas (not shown) of the tool (not designated) adjoining these tool parts are first moved upwards with a translational movement, at least up to the areas adjoining the connecting means 170 of the tool (not numbered) are freely movable in a lateral movement in the cutting plane.

In addition to a cavity (not labeled) for the connection means 170, which merges into the cavity (not labeled) of the battery shell 100, the parts of the tool (not labeled) adjoining the connection means 170 have a mold core 232 for a fluid channel (not labeled). the connection means 170 on.

During the production of the battery shell 100, the tool (not designated) is filled with a molding compound (not designated) in a first step, the molding compound (not designated) also extending along the core 232 for a fluid channel (not designated) of the connecting means 170 , So that the connection means 170 can be formed in the form of a plug 172 substantially.

In a subsequent method step, the first fluid channel 110 is formed using a fluid injection method.

When forming the first fluid channel 110, three variants have proven to be advantageous.

According to a first variant, the core 232 for a fluid channel of the connection means 170 is positioned in such a way that it just does not extend into the formed first fluid channel 110 . After the battery shell 100 has been removed from the mold, the fluid channel (not labeled) of the connection means 170 is therefore not connected to the first fluid channel 110 and must be opened if necessary in a method step subsequent to the demolding, in particular with a piercing tool (not shown).

According to a second variant, the core 232 for a fluid channel of the connection means 170 is positioned such that it extends straight into the formed first fluid channel 110 . After the battery shell 100 has been removed from the mold, the fluid channel (not labeled) of the connection means 170 is consequently already fluidly connected to the first fluid channel 110 .

According to a third variant, the core 232 for a fluid channel of the connection means 170 can be heated after the battery shell (not designated) has been formed, in particular after the crystallization of the molding compound 210, in particular at its lower tip (not designated). After the core 232 has been heated, it can be used as a piercing tool by moving it in the direction of the first fluid channel 110 . The battery tray (not labeled) can then be demoulded from the tool (not labeled/not shown).

The detailed section of a section through an embodiment of a battery shell 100 with a connection means 170 in a tool 200, shown schematically in some areas, during the production of the battery shell 100 in 8th consists essentially of a region of the base 102 of the battery shell 100 having a first fluid channel 110 formed monolithically with the battery shell 100.

In the section shown, the first fluid channel 110 has a connection means 170 which is also formed monolithically with the battery shell 100 . The battery shell 100 with the connection means 170 is still in the tool 200, which is only partially shown, in particular only in the form of a core 232 for a fluid channel of the connection means 170.

The connection means 170 is in the form of a sleeve 174 .

As for the connection means 170 in 7 exist in the embodiment of the connecting means 170 in 8th two already in 7 explained variants for the positioning of the core 232 for the fluid channel of the connection means 170.

Here, too, there is a variant in which the fluid channel (not labeled) of connection means 170 and the first fluid channel 110 are already fluidly connected after the battery shell 100 has been removed from the mold, or a different variant in which the fluid channel (not labeled) of connection means 170 and the first fluid channel 110 can first be connected to a tapping tool (not shown).

Furthermore, there is a variant in which the core 232 is heated after the battery shell (not designated) has been formed and is used as a tapping tool within the tool (not shown). The battery shell (not labeled) can then be removed from the mold and the connecting means 170 and the first fluid channel 110 are fluidly connected.

The detail of a section of an embodiment of a battery tray 100 in 9 with a designated connecting means 160 in a tool 200 during the production of the battery shell 100 essentially has a section of the battery shell 100 comprising an area of the base 102 and an area of a side wall 104, wherein in the area of the side wall 104 from the battery shell a designated connecting means 160 protrudes.

In the area of the designated connecting means 160 , the tool 200 is shown in areas and has an injection device 220 .

The designated connecting means 160 also has an undercut 176 .

After the designated connecting means 160 has been formed hollow on the inside and removed from the mold, the designated connecting means 160 can be shortened at the parting line 178 to form the connecting means 160 .

In 9 the process status is shown in which the battery shell 100 is filled with a molding compound (not designated) and the fluid injection process has not yet started.

In 10 is the view off 9 shown again with the fluid injection process already completed so that a first fluid channel 110 is formed.

The detail of a section of an embodiment of a battery tray 100 in 11 essentially has a section of the battery tray 100 comprising an area of the base 102, an area of a side wall 104 and an outer stiffening means 130, a first fluid channel 110 protruding from the battery tray in the area of the side wall 104 and extending parallel to a spacer element 134 of the outer Stiffening means 130 extends through the outer belt 132 of the outer stiffening means 130, where it merges into a connecting means 160.

The outer stiffening means 130 has in the straps 132, of which a first strap 132 coincides with a side wall 104 of the battery shell 100, a fiber material 150 which is set up to stiffen the outer stiffening means 130.

The detail of a section of an embodiment of a battery tray 100 in 12 with a designated connecting means 160 in a tool 200 during the production of the battery shell 100 essentially has a section of the battery shell 100 comprising an area of the base 102 and an area of a side wall 104, wherein in the area of the side wall 104 from the battery shell a designated connecting means 160 protrudes.

In the area of the designated connecting means 160 , the tool 200 is shown in areas and has an injection device 220 , the injection device 220 having a shaping shaft 222 and a projectile 224 .

The designated connecting means 160 also has an undercut 176 .

In 12 the process status is shown in which the battery shell 100 is filled with a molding compound (not designated) and the fluid injection process has not yet started. Rather, the projectile 224, which is set up to discharge the molding compound (not designated) from the designated first fluid channel (not designated), is still in contact with the injection device 220.

In 13 is the view off 12 shown again with the fluid injection process already begun.

By propelling the projectile 224 by a temporary filler (not numbered) from the injector 220 through the first fluid passage 110 being hollowed thereby, the first fluid passage 110 is formed in the battery tray 100 .

Reference List

A

Connection diagram battery element A

B

Connection diagram battery element B

100

battery tray

102

floor

104

Side wall

106

outside

108

inside

110

first fluid channel

120

second fluid channel

130

external stiffener

132

belt

134

Spacer element, web

136

longitudinal direction

140

internal stiffener, bulkhead

142

core, structured core

144

cover layers

146

cross rib structure

148

transverse direction

150

fiber material

160

lanyard

170

connection means

171

Fluid channel connection means

172

plug

174

sleeve

176

undercut

178

parting line

180

battery temperature control element

190

edge area

192

mid range

200

Tool

210

molding compound

220

injection device

222

shaft

224

projectile

230

Form core for structured core

232

Molded core for fluid channel connection means

240

piercing tool

250

secondary cavity

260

Valve

Claims (34)

Battery tray (100), in particular a battery tray (100) of a traction battery, the battery tray (100) being formed from plastic, the battery tray (100) having a base (102) and at least four side walls (104), the battery tray (100 ) has an inner side (108) and an outer side (106), wherein the battery shell (100) has a first fluid channel (110) and a second fluid channel (120), wherein the first fluid channel (110) and the second fluid channel (120) extending through the battery tray (100), characterized in that the first and/or the second fluid channel (110, 120) is formed monolithically with the battery tray (100). battery tray (100) after claim 1 , characterized in that the battery shell (100) is made with an injection molding process or a pressing process. Battery tray (100) according to one of Claims 1 or 2 , characterized in that the battery shell (100) has on the outside (106) at least one outer stiffening means (130) formed monolithically with the battery shell (100), in particular at least one extending in a longitudinal direction (136) of the battery shell (100). Stiffening means (130), in particular at least one outer stiffening means (130) having two straps (132), in particular at least one outer stiffening means (130) having two straps (132), which are at least indirectly supported by a spacer element (134), in particular a web (134 ), are spaced apart from each other. Battery shell (100) according to one of the preceding claims, characterized in that the battery shell (100) has on the inside (108) at least one monolithically formed with the battery shell (100) inner stiffening means (140), in particular at least one in a transverse direction ( 148) of the battery shell (100) extending inner stiffening means (140), in particular a frame (140) extending in the transverse direction and/or longitudinal direction (136). Battery tray (100) according to one of claims 3 or 4 , characterized in that at least one inner stiffening means (140) has a core (142), in particular a structured core (142), in the middle of two cover layers (144) delimiting the core (142), in particular a structured core (142) having a cross-rib structure (146). Battery tray (100) according to one of claims 3 until 5 , characterized in that an inner stiffening means (130) and/or an outer stiffening means (140), in particular at least one cover layer (144) of an inner stiffening means (140) and/or at least one belt (132) of an outer stiffening means (130), has a fiber material (150) at least in regions, in particular a fiber material (150) aligned essentially in a main direction of extent of the at least one inner stiffening means (140) and/or in a main direction of extent of the at least one outer stiffening means (130). Battery shell (100) according to one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) has a connecting means (160) on the outside (106) of the battery shell (100), the connecting means (160 ) is set up for connection to a temperature control device. battery tray (100) after claim 7 , characterized in that the first and/or the second fluid channel (110, 120) extends through an outer stiffening means (130), in particular parallel to the spacer element (134), in particular a web (134), of the outer stiffening means (130) extends. Battery shell (100) according to one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) has at least one connection means (170) on the inside (108) of the battery shell (100). has, in particular at least one connection means (170), which is set up for connection to at least one battery temperature control element (180). battery tray (100) after claim 9 , characterized in that at least one connection means has the form of a connector, in particular the form of a plug (172) or a sleeve (174). battery tray (100) after claim 10 , characterized in that a connector has an undercut (176). Battery shell (100) according to one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) is formed at least in regions using a fluid injection method. Battery shell (100) according to one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) extends at least in regions through the base (102) of the battery shell (100), in particular in regions in a straight line through the base ( 102) of the battery tray (100). battery tray (100) after Claim 13 , characterized in that the first and / or the second fluid channel (110, 120), based on the maximum extension of the bottom (102) of the battery shell (100) in the direction of the extension of the first and / or the second fluid channel (110, 120) through the bottom (102) of the battery tray (100) by no less than 10%, preferably by no less than 20% and more preferably by no less than 30%. Battery tray (100) according to one of Claims 13 or 14 , characterized in that the first and/or the second fluid channel (110, 120), relative to the extent of the battery shell (100) running transversely to the direction of the extent of the first and/or the second fluid channel (110, 120), extends in an edge area (190) of less than 33%, preferably in an edge area (190) of less than 20% and particularly preferably in an edge area (190) of less than 10%, in particular in a left and/or a right edge area (190) of the battery tray (100). Battery tray (100) according to one of Claims 13 until 15 , characterized in that the first and/or the second fluid channel (110, 120), relative to the extent of the battery shell (100) running transversely to the direction of the extent of the first and/or the second fluid channel (110, 120), extend in a center (192) area of less than 33%, preferably in a center (192) area of less than 20% and more preferably in a center (192) area of less than 10%. Battery tray (100) according to any one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) extend under at least one internal stiffening means (130). Battery shell (100) according to one of the preceding claims, characterized in that the first and/or the second fluid channel (110, 120) extends at least in regions through at least one side wall (104), in particular in regions in a direction of extension of at least one side wall (104) the battery tray (100) extends. battery tray (100) after Claim 18 , characterized in that the first fluid channel (110) and/or the second fluid channel (120) extends by no less than 10% of a longitudinal extent of the at least one side wall (104) in the direction of the at least one side wall (104), preferably by no less than 20% and more preferably not less than 30%. Traction battery, in particular a traction battery for a motor vehicle, comprising a battery shell (100) according to one of Claims 1 until 19 . traction battery claim 20 , characterized in that the traction battery has a battery temperature control element (180), in particular a battery temperature control element (180) which has fluid communication with the first and the second fluid channel (110, 120). Motor vehicle having a battery tray (100) according to one of Claims 1 until 19 and/or a traction battery according to one of claims 20 or 21 . Tool (200) for producing a monolithic battery shell (100) made of plastic, having a first and/or second fluid channel (110, 120), in particular a battery shell (100) according to one of Claims 1 until 19 , wherein the tool (200) forms an article cavity, wherein the tool (200) has means for filling the article cavity with a molding compound (210) made of plastic, the tool (200) having at least one injection device (220) for injecting a fluid into the Article cavity has. tool (200) after Claim 23 , characterized in that the tool (200) has at least one means for clamping a fiber material (150), in particular a shock-frozen fiber material (150). Tool (200) according to one of Claims 23 or 24 , characterized in that the injection device (220) has a shaping shaft (222) which forms a mold cavity with the article cavity. Tool (200) according to one of Claims 23 until 25 , characterized in that the tool (200) has at least one mold core (230) which is set up for forming a structured core (142) in the middle of two cover layers (144) delimiting the core (142), in particular for forming a structured Core (142) having a cross-rib structure (146). Tool (200) according to one of Claims 23 until 26 , characterized in that the tool (200) has at least one mold core (232) which is set up to shape a partial area of the fluid channel (171) at least one connection means. Tool (200) according to one of Claims 23 until 27 , characterized in that the tool (200) has a piercing tool (240), the piercing tool (240) being set up to form a fluid channel (171) between a first or second fluid channel (110, 120) and a connecting means (170). . Tool (200) according to one of Claims 23 until 28 , characterized in that the tool (200) for forming a connecting means (170) has a secondary cavity (250). Tool (200) according to one of Claims 23 until 29 , characterized in that a valve (260) is arranged between the at least one secondary cavity (250) and the tool (200) forming the article cavity. Method for producing a monolithic battery shell (100) made of plastic, having a first and/or second fluid channel (110, 120), in particular a battery shell (100) according to one of Claims 1 until 19 , by means of an injection molding device or a pressing device with a tool (200) forming an article cavity, in particular a tool (200) according to one of Claims 23 until 30 , with means for filling the article cavity with a molding compound (210) made of plastic, with at least one injection device (220) for injecting a fluid into the article cavity and with at least one secondary cavity (250), the manufacturing method comprising the following steps: a) filling the article cavity with a molding compound (210) made of plastic; b) introducing a pressurized fluid into the article cavity by means of the injection device (220), with a part of the molding compound (210) forming the first and/or the second fluid channel (110, 120) being displaced into a secondary cavity (250); c) demolding the monolithic battery shell (100). procedure after Claim 31 , characterized in that the tool (200) forming the article cavity is equipped at least in regions with a fiber material (150), in particular a shock-frozen fiber material (150), before the article cavity is filled with the molding compound (210) made of plastic. Procedure according to one of Claims 31 or 32 , characterized in that a valve (260) is arranged between the at least one secondary cavity (250) and the tool (200) forming the article cavity, wherein the displacement of the molding compound (210) into the at least one secondary cavity (250) with the valve ( 260) is controlled. Procedure according to one of Claims 31 until 33 , characterized in that after the demolding of the battery shell (100) or before the demolding of the battery shell (100) by means of a piercing tool (240) a fluid connection between a first fluid channel (110) or a second fluid channel (120) and a region of a fluid channel ( 171) of a connecting means (170).

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