Battery housing component for a battery housing, battery housing for receiving a plurality of battery components and battery having a battery housing

Abstract

The present invention relates to a battery housing component (10) for a battery housing (2), having a plurality of receiving devices (20) for receiving a multiplicity of battery components (3). The battery housing component (10) has a number of through openings (30) corresponding to the plurality of receiving devices (20), said through openings being formed in a base (11) of the battery housing component (10), wherein in a top view of the base (11) of the battery housing component (10), one through opening (30) is in each case at least partially enclosed by one receiving device (20), and wherein the battery component (10) has a sealing layer (40) for sealing the through openings (30), wherein the sealing layer (40) is integrally bonded to the base (11) of the battery housing component (10). The present invention also relates to a battery housing (2) having a battery housing component (10), and to a battery (1) having a battery housing (2) and a plurality of battery components (3).

Description

[0001] Battery housing component for a battery housing, battery housing for accommodating a plurality of battery components and battery with a battery housing

[0002] The present invention relates to a battery housing component for a battery housing, a battery housing for accommodating a plurality of battery components and a battery with a battery housing.

[0003] A battery, in particular a traction battery for storing energy in a motor vehicle, has a large number of battery components, for example battery cells, which enter into an irreversible chemical decomposition process above a certain temperature and in the process release a large amount of the stored energy through oxidation. An initially closed battery cell builds up pressure and bursts at a predetermined point, at which point a hot gas jet emerges at high speed and fills a storage volume of a battery casing with gas. The pressure in the storage volume caused by the gas that collects in the storage volume must be reduced in order to prevent uncontrolled escape of the gas from the battery casing.

[0004] In battery housings known from the prior art, the gas escapes through an opening or a predetermined breaking point in a wall of the battery housing when a predetermined overpressure is exceeded. The object of the invention is to provide a battery housing component that enables improved, controlled release of gas from a battery housing while simultaneously enabling immersion cooling, in particular two-phase immersion cooling.

[0005] The object underlying the present invention is achieved by a battery housing component having the features of claim 1. Advantageous embodiments of the battery housing component are described in the claims dependent on claim 1.

[0006] More specifically, the object underlying the present invention is achieved by a battery housing component for a battery housing, wherein the battery housing component has a plurality of receiving devices for receiving a plurality of battery components and a number of through openings corresponding to the plurality of receiving devices, which are formed in a base of the battery housing component. In a plan view of the base of the battery housing component, a through opening is at least partially enclosed by a respective receiving device. The battery housing component has a sealing layer for sealing the through openings, wherein the sealing layer is materially connected to the base of the battery housing component.

[0007] When reference is made below to a proper use or intended use of a battery housing component, this use or use is to be understood as meaning, for example, a use or use as a battery housing component for a battery housing of a battery with a plurality of battery components (e.g. battery cells). A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, enables immersion cooling, in particular two-phase immersion cooling, of battery components and at the same time enables improved protection against uncontrolled gas escape from a receiving volume of a battery housing during an irreversible chemical decomposition process of the battery components.The gas jet escaping from a battery component during chemical decomposition of the battery components breaks through the sealing layer in the area of ​​a through-opening, so that a gas contained in the receiving volume is discharged from the receiving volume in an improved, controlled manner. This simultaneously reduces the pressure within the receiving volume and lowers the temperature. In normal operating mode of the battery, i.e. during operation without an irreversible chemical decomposition process, the sealing layer seals the through-openings in a fluid-tight manner despite the overpressures and underpressures generated by the immersion cooling, in particular by the two-phase immersion cooling, in a receiving volume of the battery housing.

[0008] When a negative pressure occurs in a receiving volume of a battery housing having a battery housing component according to the invention, the sealing layer in the region of the through-openings in the base of the battery housing component is deformed in the direction of the receiving volume. In other words, the sealing layer bulges in the region of the through-openings in the base of the battery housing component in the direction of the receiving volume of the battery housing.

[0009] In the event of an overpressure in a receiving volume of a battery housing having a battery housing component according to the invention, the sealing layer in the region of the through-openings in the base of the battery housing component is deformed in the direction away from the receiving volume. In other words, the sealing layer bulges in the region of the through-openings in the base of the battery housing component in the direction away from the receiving volume.

[0010] A through-opening which, in a plan view of the bottom of the battery housing component, is enclosed by a receiving device, is bordered by the receiving device. In other words, a free cross-sectional area of ​​the through-opening is smaller than a receiving area which, in a plan view of the bottom of the battery housing component, is at least partially delimited by the receiving device. Furthermore, the free cross-sectional area of ​​the through-opening in a plan view of the bottom of the battery housing component lies completely within the receiving area partially delimited by the receiving device.

[0011] Preferably, the plurality of receiving devices corresponds to the plurality of battery components that can be accommodated. In other words, one battery component can be inserted into each receiving device.

[0012] The battery components can be designed as battery cells, in particular as cylindrical battery cells. The cylindrical battery cells can preferably have the 4680 format. Alternatively or additionally, the battery components can be designed as battery modules.

[0013] Preferably, the battery housing component is designed to accommodate 500 or more battery cells, in particular 700 or more battery cells.

[0014] Preferably, the battery housing component, and further preferably the base of the battery housing component, comprises or is formed from a plastic, in particular a thermoplastic plastic. The plastic can be formed as polyamide and / or as polyamide 6 and / or as polypropylene.

[0015] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured more easily.

[0016] Preferably, the battery housing component is designed as an injection-molded component.

[0017] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured even more easily, in particular in one manufacturing step.

[0018] More preferably, the battery housing component, and even more preferably the base of the battery housing component, comprises fibers. The fibers can be formed as glass fibers and / or as carbon fibers and / or as aramid fibers. The battery housing component preferably comprises a polyamide 6 with a 30-40% glass fiber content and / or a polypropylene with a 30-40% glass fiber content.

[0019] A battery housing component designed in this way has the advantage that the battery housing component has improved stability, in particular improved mechanical rigidity.

[0020] The sealing layer preferably comprises or is formed from a plastic, in particular a thermoplastic. The plastic can be polyamide and / or polyamide 6 and / or polypropylene. Even more preferably, the plastic of the sealing layer is not fiber-reinforced, i.e., preferably no fibers are embedded in the plastic of the sealing layer.

[0021] A battery housing component designed in this way has the advantage that the sealing layer can burst more easily.

[0022] Further preferably, the base has a greater thickness than the sealing layer.

[0023] The sealing layer preferably has a thickness of between 0. 4 mm and 2 mm, more preferably between 0. 5 mm and 1. 8 mm, and even more preferably between 1 mm and 1. 5 mm.

[0024] A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, has improved protection against uncontrolled gas escape from a receiving volume of the battery housing during an irreversible chemical decomposition process of the battery components and at the same time enables sufficient fluid tightness for immersion cooling, in particular two-phase immersion cooling. The thickness of the sealing layer is just thick enough that the sealing layer can withstand the overpressures and underpressures occurring in the receiving volume as a result of immersion cooling, in particular two-phase immersion cooling, and at the same time can be penetrated by a gas jet escaping from a battery component in the region of a through-opening, so that the resulting gas is guided out of the receiving volume.

[0025] The battery housing component is preferably designed as a battery housing shell. The battery housing component can also be referred to as a battery housing lower shell or generally as a lower shell. The battery housing component preferably delimits a receiving volume at least partially.

[0026] The through openings preferably have a circular free cross-sectional area.

[0027] The receiving devices are preferably arranged on an inner surface of the bottom of the battery housing component facing the receiving volume.

[0028] A battery housing component designed in this way has the advantage that the battery components can be easily accommodated in the receiving volume of the battery housing component.

[0029] The inner surface of the base is arranged opposite the connecting surface of the base. In other words, the inner surface of the base of the battery housing component is the surface of the base of the battery housing component opposite the connecting surface.

[0030] Preferably, the sealing layer is materially connected to the inner surface of the bottom of the battery housing component facing the receiving volume.

[0031] A battery housing component designed in this way has the advantage that the battery housing component has improved fluid tightness. If the sealing layer is connected to the inner surface of the base of the battery housing component, the number of sealing points facing the receiving volume is reduced. As a result, the sealing points between through openings and the sealing layer are arranged facing away from the receiving volume. Preferably, the battery housing component is designed such that the sealing layer comprises a material with a melt flow index of greater than or equal to 35 g / 10 min.

[0032] The melt flow index of a material describes its flow behavior under specific pressure and temperature conditions. The melt flow index of a material is determined, for example, according to ISO 1133. The melt flow index of a material can be expressed as a melt volume flow rate or as a melt mass flow rate. A melt flow index expressed as a melt volume flow rate has the unit cm 3 / 10 min. A melt flow index expressed as a melt mass flow rate has the unit g / 10 min. The specified value ranges for the melt flow index apply in particular to a determination according to ISO 1133 at a test temperature of 230 °C and a test weight of 2.16 kg.

[0033] A battery housing component designed in this way has the advantage that the sealing layer breaks more reliably when a predetermined pressure is exceeded within a battery housing in which the correspondingly designed battery housing component is installed.

[0034] Preferably, the battery housing component is designed such that the sealing layer comprises a material with a melt flow index of greater than or equal to 60 g / 10 min.

[0035] Preferably, the battery housing component is designed such that the sealing layer comprises a material with a melt flow index of less than or equal to 90 g / 10 min.

[0036] Particularly preferably, the battery housing component is designed such that the sealing layer comprises a material with a melt flow index in a range from 35 g / 10 min to 90 g / 10 min. Preferably, the battery housing component is designed such that the battery housing component at least partially delimits a receiving volume for receiving a plurality of battery components, wherein the sealing layer is materially connected to a connecting surface of the base of the battery housing component facing away from the receiving volume.

[0037] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured in a simplified manner, in particular in a simplified manner in one manufacturing step.

[0038] Preferably, the sealing layer is materially bonded to the connecting surface of the bottom of the battery housing component in an injection molding process.

[0039] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured even more easily.

[0040] Alternatively, the sealing layer is materially bonded to the connecting surface of the bottom of the battery housing component by welding and / or gluing.

[0041] Preferably, the sealing layer is additionally connected in a force-fitting and / or form-fitting manner to the connecting surface of the bottom of the battery housing component.

[0042] Preferably, the battery housing component is designed such that the sealing layer is connected to the base of the battery housing component in such a way that the through-openings are completely closed by the sealing layer. In a plan view of the base of the battery housing component, the free cross-sectional areas of the through-openings are completely closed by the sealing layer and, in particular, sealed in a fluid-tight manner. In other words, the sealing layer covers the through-openings of the base of the battery housing component in a plan view of the base, in particular in a plan view of the connecting surface of the base of the battery housing component.Consequently, the passage openings are sealed fluid-tight by the sealing layer, so that the sealing layer can better withstand an overpressure and / or a negative pressure generated, for example, by immersion cooling, in particular two-phase immersion cooling, in a receiving volume of a battery housing. A battery housing component designed in this way therefore has the advantage that the battery housing component has improved fluid tightness when used as intended.

[0043] Preferably, the battery housing component is designed such that the sealing layer has at least one reinforcing rib which extends from the sealing layer into a free cross-sectional area of ​​a through opening.

[0044] When the battery housing component is used as intended, a free space is formed between a battery component inserted in a receiving device, in particular a bottom surface of the battery component, and the sealing layer. In other words, battery components inserted in the receiving devices are arranged at a distance from the sealing layer.

[0045] A battery housing component designed in this way has the advantage that the battery housing component has improved stability when used as intended. When a negative pressure occurs in the receiving volume due to a deformation of the sealing layer in the region of the through-opening, the reinforcing rib extending into the free cross-sectional area of ​​the through-opening comes into contact with the bottom surface of a battery component inserted into the receiving device enclosing the through-opening. This limits the deformation of the sealing layer and thus improves the stability of the battery housing component.

[0046] Preferably, the reinforcing rib extends from the sealing layer through a through opening into a receiving volume partially delimited by the battery housing component.

[0047] A battery housing component designed in this way has the advantage that the battery housing component exhibits further improved stability when used as intended. The reinforcing rib extends into the receiving volume of the battery housing, thereby reducing the distance to the base surface of a battery component inserted in a receiving device. This reduces the deformation of the sealing layer in the region of this through-opening and thus further improves the stability of the battery housing component.

[0048] The reinforcing rib is preferably spaced apart from a battery component inserted in a receiving device, in particular from a bottom surface of a battery component inserted in the receiving device.

[0049] Alternatively, the reinforcing rib is in contact with a battery component inserted into the receiving device, in particular with the bottom surface of the battery component.

[0050] A battery housing component designed in this way has the advantage that the battery housing component exhibits even greater stability when used as intended. Because the reinforcing rib is in contact with a battery component inserted in a receiving device, the deformation of the sealing layer in the region of the through-opening due to negative pressure in the receiving volume is further reduced.

[0051] Preferably, the sealing layer is arranged on the inner surface of the bottom of the battery housing component, and the sealing layer has at least one reinforcing rib extending from the sealing layer into the receiving volume.

[0052] A battery housing component designed in this way has the advantage that the battery housing component has even better stability when used as intended, particularly when there is a negative pressure in the receiving volume.

[0053] The reinforcing rib is preferably connected to the sealing layer, in particular materially connected and preferably formed monolithically with the sealing layer.

[0054] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured more easily.

[0055] Two monolithic components are made from a single piece of material and are connected to each other without any joints.

[0056] The sealing layer preferably has a plurality of reinforcing ribs, with a plurality of reinforcing ribs extending from the sealing layer into a respective free cross-sectional area of ​​a through-opening. A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, has further improved stability, particularly in the event of a negative pressure in the receiving volume.

[0057] Preferably, the battery housing component is designed such that at least one receiving device has at least one receiving elevation which extends from an inner surface of the bottom of the battery housing component into a receiving volume which is at least partially delimited by the battery housing component.

[0058] A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, enables even better protection against uncontrolled gas escape from a receiving volume of a battery housing during an irreversible chemical decomposition process of the battery components. The battery components of a battery can be inserted into the receiving devices in such a way that the receiving elevations hold the battery components inserted in the receiving devices in the position inserted in the receiving device even during an irreversible chemical decomposition process. This prevents, in particular, gas escaping from the battery components from reaching neighboring battery components, so that the escaping gas is guided out of the receiving volume almost exclusively through the through openings in the base of the battery housing component.

[0059] Preferably, the battery housing component is designed such that each receiving device has at least one receiving elevation which extends from an inner surface of the bottom of the battery housing component into a receiving volume which is at least partially delimited by the battery housing component.

[0060] The receiving protrusion can be integrally connected to the base of the battery housing component. Preferably, the receiving protrusion is formed monolithically with the base of the battery housing component.

[0061] The receiving protrusion can be cylindrical, in particular, the receiving protrusion can be designed as a pin. An upper region of the receiving protrusion can be tapered.

[0062] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured in a simplified manner and, at the same time, a battery component inserted in a receiving device can be positioned more effectively in the receiving device.

[0063] At least one receiving protrusion, preferably exactly one receiving protrusion, is preferably arranged on the bottom of the battery housing component, adjacent to four through-openings in the bottom of the battery housing component. A receiving protrusion arranged in this way can be a component of up to four adjacent receiving devices. In other words, four different receiving devices can have the same receiving protrusion.

[0064] A battery housing component designed in this way has the advantage that the battery housing component is easier to manufacture. Because a receiving protrusion is a component of more than one receiving device, the number of required receiving protrusions can be reduced while maintaining the same number of receiving devices. The receiving area delimited by the receiving protrusion is preferably greater than or equal to the cross-sectional area of ​​a battery component.

[0065] A battery housing component designed in this way has the advantage that battery components can be used in a simplified manner in the battery housing component.

[0066] Preferably, the receiving elevation at least partially delimits a receiving surface of a receiving device. The receiving surface delimited by the receiving elevation is preferably circular.

[0067] A battery housing component designed in this way has the advantage that cylindrical battery cells can be used more effectively in the battery housing component.

[0068] The receiving protrusion is preferably formed as a one-piece, circular rib. Consequently, the receiving protrusion is hollow and cylindrical.

[0069] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured more easily and that, at the same time, cylindrical battery cells can be used even more effectively in the battery housing component.

[0070] Preferably, the receiving devices each have three, preferably four, receiving elevations.

[0071] The receiving elevations of a receiving device are preferably arranged equidistant from one another. In particular, the receiving elevations of a receiving device are arranged angularly equidistant from one another on a circular contour delimiting the receiving surface.

[0072] Preferably, the battery housing component is designed such that the battery housing component has a bottom which is at least indirectly connected to the bottom of the battery housing component, wherein a cavity for receiving a gas generated in the receiving volume is formed between the sealing layer and the bottom.

[0073] A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, enables even better protection against uncontrolled gas escape from a receiving volume of a battery housing during an irreversible chemical decomposition process of the battery components. A gas which arises in the receiving volume and is expelled during an irreversible chemical decomposition process of battery components arranged in the receiving volume can break through the sealing layer in the region of the through openings and be absorbed in the cavity between the sealing layer and the underbody. This prevents excess pressure in the receiving volume and uncontrolled gas escape from the receiving volume.

[0074] The underbody is preferably indirectly connected to the bottom of the battery housing component via a side wall of the battery housing component.

[0075] The underbody preferably comprises the same material as the battery housing component or is formed from it. A battery housing component designed in this way has the advantage that the battery housing component is easier to manufacture.

[0076] The subfloor preferably has a connecting area.

[0077] The underbody is preferably connected at least indirectly, preferably directly, to the bottom of the battery housing component in the connection area of ​​the underbody.

[0078] The underbody is preferably connected to the sealing layer in the connection region of the underbody, preferably materially connected to the sealing layer, wherein the sealing layer is arranged in a sandwich-like manner between the bottom of the battery housing component and the underbody.

[0079] A battery housing component designed in this way has the advantage that, when used as intended, the battery housing component offers improved protection against uncontrolled gas leakage during an irreversible chemical decomposition process. Because the underbody is firmly bonded to the sealing layer in the connection area, the cavity formed between the sealing layer and the underbody has even better fluid tightness.

[0080] The subfloor is preferably shell-shaped. The subfloor preferably has a circumferential flange. The connecting region of the subfloor is preferably formed on the circumferential flange. The circumferential flange preferably forms the connecting region of the subfloor.

[0081] A battery housing component designed in this way has the advantage that, when used as intended, it provides even better protection against uncontrolled gas leakage during an irreversible chemical decomposition process. The cavity formed between the sealing layer and the underbody has an enlarged volume, allowing a larger amount of gas to be absorbed from the receiving volume. This further reduces excess pressure in the receiving volume.

[0082] The underbody is preferably designed as underbody protection.

[0083] A battery housing component designed in this way has the advantage that the battery housing component has improved stability, in particular improved mechanical rigidity.

[0084] Preferably, the battery housing component is designed such that the underbody is materially connected at least indirectly to the bottom of the battery housing component.

[0085] Preferably, the underbody is at least indirectly connected to the bottom of the battery housing component by means of welding and / or adhesive.

[0086] Preferably, the underbody is materially connected to an outer surface of the battery housing component in the connection area of ​​the underbody.

[0087] The connecting region of the subfloor is preferably formed on an edge of the subfloor surrounding the subfloor.

[0088] The underbody is preferably connected, in particular materially bonded, to a peripheral edge region of the connecting surface of the bottom of the battery housing component. The battery housing component is preferably designed such that the underbody has at least one outlet opening for discharging the gas generated in the receiving volume and / or absorbed in the cavity.

[0089] When the battery housing component is designed accordingly, when used as intended, gas discharged through the through-openings in the base of the battery housing component is released into the environment via the receiving volume and via at least one outlet opening.

[0090] A battery housing component designed in this way has the advantage that the battery housing component, when used as intended, counteracts an overpressure in the receiving volume and in the cavity.

[0091] Preferably, the battery housing component is designed such that the battery housing component has at least one support rib which is arranged between the sealing layer and the underbody.

[0092] A battery housing component designed in this way has the advantage that the battery housing component exhibits improved stability when used as intended. Thanks to a support rib between the sealing layer and the base, the battery housing exhibits improved stability against excess pressure, such as that which occurs during immersion cooling, particularly two-phase immersion cooling, in the receiving volume of the battery housing.

[0093] Preferably, the support rib extends from the sealing layer toward an inner surface of the subfloor facing the sealing layer and is connected to the sealing layer, in particular by a material-to-material bond. Alternatively, the support rib extends from an outer side of the sealing layer facing the subfloor toward the subfloor and is connected to the sealing layer, in particular by a material-to-material bond.

[0094] Preferably, the support rib is in contact with the inner surface of the subfloor, in particular in direct contact. In other words, the support rib is not connected to the inner surface of the subfloor.

[0095] Alternatively, the support rib is monolithically bonded to the subfloor. Alternatively, the support rib is in contact with the outer side of the sealing layer, preferably in direct contact. In other words, the support rib is not bonded to the outer side of the sealing layer.

[0096] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured in a simplified manner, in particular in one manufacturing step.

[0097] Preferably, the support rib is monolithically connected to the sealing layer.

[0098] In a plan view of the bottom of the battery housing component, the support rib is enclosed by a through-opening. In other words, the support rib is arranged in the region of a through-opening in the bottom of the battery housing component.

[0099] A support rib which, in a plan view of the bottom of the battery housing component, is enclosed by a through-opening, is bordered by the through-opening. In other words, a cross-sectional area of ​​the support rib is smaller than a free cross-sectional area of ​​the through-opening in a plan view of the bottom of the battery housing component. The cross-sectional area of ​​the support rib lies completely within the free cross-sectional area of ​​the through-opening. The support rib can be cylindrical or hollow-cylindrical. Alternatively, the support rib can have a rectangular and preferably a square cross-sectional area.

[0100] The present invention is also based on the object of providing a battery housing which enables an improved controlled release of gas produced from the battery housing and at the same time enables immersion cooling, in particular a two-phase immersion cooling.

[0101] This object underlying the present invention is achieved by a battery housing which has a battery housing component as described above, wherein the battery housing has a battery housing cover which is connected to the battery housing component in such a way that a receiving volume for receiving the plurality of battery components is formed.

[0102] A battery housing designed in this way has the advantage that the battery housing enables improved immersion cooling, in particular two-phase immersion cooling, of battery components accommodated in the receiving volume of the battery housing and at the same time enables improved protection against uncontrolled gas escape from the receiving volume of the battery housing during an irreversible chemical decomposition process of the accommodated battery components. The gas jet escaping from a battery component during the chemical decomposition of the battery components breaks through the sealing layer in the region of a through-opening, so that a gas located in the receiving volume is guided out of the receiving volume in a controlled manner. This simultaneously reduces the pressure within the receiving volume and lowers the temperature.In a normal operating mode of a battery having a battery housing according to the invention, the sealing layer seals the passage openings in a fluid-tight manner despite the overpressures and negative pressures generated in the receiving volume of the battery housing by the immersion cooling, in particular by the two-phase immersion cooling.

[0103] The battery housing cover is preferably designed as a battery housing shell. The battery housing cover can also be referred to as the battery housing upper shell or generally as the upper shell.

[0104] A battery housing designed in this way has the advantage that the battery housing has an enlarged storage volume.

[0105] The battery housing cover can be designed as another battery housing component described above.

[0106] The battery housing cover can be designed as an essentially flat component.

[0107] The battery housing cover preferably comprises or is formed from the same material as the battery housing component.

[0108] The battery housing cover is preferably designed as an injection-molded component.

[0109] The battery housing cover is preferably materially connected to the battery housing component.

[0110] A battery housing designed in this way has the advantage that the battery housing offers even better protection against uncontrolled gas escape from the receiving volume of the battery housing. Due to the material-to-material connection between the battery housing component and the battery housing cover, the receiving volume has improved fluid tightness. The present invention is also based on the object of providing a battery which enables controlled release of gas generated from a battery housing and at the same time enables immersion cooling, in particular two-phase immersion cooling.

[0111] This object underlying the present invention is achieved by a battery comprising a previously described battery housing and a plurality of battery components, wherein a respective battery component is inserted into a respective receiving device of the battery housing component.

[0112] A battery designed in this way has the advantage that the battery enables immersion cooling, in particular two-phase immersion cooling, of the battery components and at the same time enables improved protection against uncontrolled gas escape from the battery during an irreversible chemical decomposition process of the battery components. The gas jet escaping from a battery component during the chemical decomposition of the battery components breaks through the sealing layer in the region of a through-opening, so that a gas located in the receiving volume is discharged from the receiving volume in an improved, controlled manner. This simultaneously reduces the pressure within the receiving volume and lowers the temperature.In a normal operating mode of the battery, the sealing layer seals the passage openings fluid-tight despite the overpressures and negative pressures generated by the immersion cooling, in particular by the two-phase immersion cooling, in the receiving volume of the battery housing.

[0113] At least one battery component is inserted into a receiving device in such a way that the battery component, in a plan view of the base, in particular in a plan view of the inner surface of the base, completely covers the through-opening enclosed by the receiving device. Because the free cross-sectional area of ​​the through-opening has a smaller area than the cross-sectional area of ​​the battery component inserted into the receiving device, the base surface of the battery component is in contact with the receiving surface of the receiving device, wherein the through-opening is completely covered by the base surface of the battery component. This forms a free space between the base surface of the battery component and the sealing layer. Cooling fluid for immersion cooling, in particular two-phase immersion cooling, can be accommodated in this free space.

[0114] Preferably, the battery is designed such that at least one battery component is materially connected to a receiving surface of the receiving device in which the battery component is inserted.

[0115] The receiving surface is preferably materially connected to the bottom surface of the battery component.

[0116] The battery component is preferably additionally materially connected to an inner wall of at least one receiving elevation.

[0117] A battery designed in this way has the advantage that the battery has even better protection against uncontrolled gas escape from the receiving volume of the battery housing. The at least one battery component is inserted into the receiving device in an even better manner thanks to the additional material connection with the inner wall of the receiving elevation, so that in the event of an irreversible chemical decomposition process, the battery component is held fixed in the receiving device and a gas jet escapes from the receiving volume only through the through-opening in the base of the battery component.

[0118] Preferably , the battery is designed such that the battery component is firmly connected to the receiving surface by means of an adhesive , wherein the adhesive has a heat resistance up to a temperature of 600 ° C .

[0119] An adhesive with heat resistance up to 600 ° C maintains its bonding properties at temperatures up to 600 ° C. In particular, such an adhesive does not begin to decompose, so its fixing effect is maintained even at temperatures up to 600 ° C.

[0120] The adhesive is preferably a silicone adhesive.

[0121] Preferably, the battery component is additionally connected to an inner wall of at least one receiving elevation in a material-locking manner by means of the adhesive.

[0122] A polyurethane (PU), in particular a polyurethane foam, can be arranged between the battery components. The polyurethane and / or polyurethane foam can have a heat resistance of up to 120°C.

[0123] The present invention is also based on the object of providing a motor vehicle which allows a controlled release of gas from a battery housing of a battery and at the same time an immersion cooling, in particular a two-phase immersion cooling, of the

[0124] Battery components of the battery. This object underlying the present invention is achieved by a motor vehicle having a battery as described above.

[0125] The present invention is also based on the object of providing an injection molding process which enables cost-effective and simple production of a battery housing component as described above.

[0126] This object underlying the present invention is achieved by an injection molding method for producing a previously described battery housing component by means of an injection molding tool, wherein the injection molding tool has a first tool half and a second tool half. The injection molding method comprises the following method steps:

[0127] Injecting a fiber-reinforced plastic into the injection mold in the closed position;

[0128] Moving the first tool half of the injection molding tool so that a free space is formed between the first tool half and the fiber-reinforced plastic located in the second tool half; and

[0129] Injecting a fiber-free plastic into the injection mold so that the fiber-reinforced plastic in the second mold half is overmolded by the fiber-free plastic until the free space is filled.

[0130] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0131] Figure 1: a plan view of a battery housing component according to the invention; Figure 2: a sectional view of a battery housing component according to the invention

[0132] Battery comprising a battery housing according to the invention with a battery housing component according to the invention shown in Figure 1; and

[0133] Figure 3: a sectional view of a battery in the region of a receiving device according to a further embodiment.

[0134] In the following description, identical reference symbols designate identical components or identical features, so that a description of a component made with reference to one figure also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0135] Figure 1 shows a battery housing component 10 for a battery housing 2 shown in Figure 2 in a plan view of a base 11 of the battery housing component 10. The battery housing component 10 has a plurality of receiving devices 20 for receiving a plurality of battery components 3. Furthermore, the battery housing component 10 has a number of through openings 30 corresponding to the plurality of receiving devices 20, which are formed in the base 11 of the battery housing component 10. In a plan view of an inner surface 112 of the base 11 of the battery housing component 10, a through opening 30 is each bordered by a receiving device 20. In other words, a through opening 30 is each bordered by a receiving device 20.The receiving devices 20 each have a receiving elevation 21, which each extend from the inner surface 112 of the base 11 of the battery housing component 10 into a receiving volume 4 at least partially delimited by the battery housing component 10. The receiving elevations 21 are each designed as one-piece, circular ribs which are monolithically connected to the base 11 of the battery housing component 10. The receiving elevations 21 each delimit a receiving surface 22 of the receiving device 20, wherein the receiving surface 22 is circular. The receiving elevation 21 and the receiving surface 22 as well as the through opening 30 are arranged concentrically to one another.

[0136] Figure 2 shows a battery 1 according to the invention in a sectional view, wherein the battery 1 has a battery housing 2 according to the invention with a battery housing component 10 according to the invention in the form of a battery housing lower shell 10. The battery 1 has a plurality of battery components 3, wherein a battery component 3 is inserted into a respective receiving device 20 of the battery housing component 10. In the battery 1 shown, the battery components 3 are each designed as battery cells 3.

[0137] The battery housing 2 has a battery housing cover 7 which is connected to the battery housing component 10 in such a way that a receiving volume 4 is formed for receiving the plurality of battery components 3.

[0138] The battery housing component 10 has a sealing layer 40 for sealing the through-openings 30, wherein the sealing layer 40 is materially connected to the base 11 of the battery housing component 3, so that the through-openings 30 are completely closed by the sealing layer 40. The sealing layer 40 is materially connected to a connecting surface 111 of the base 11 of the battery housing component 10, said connecting surface facing away from the receiving volume 4. The connecting surface 111 of the base 11 is the surface of the base 11 of the battery housing component 10 opposite the inner surface 112.

[0139] The battery housing component 10 has a bottom 50 which is directly connected to the bottom of the battery housing component 10, wherein a cavity 60 is formed between the sealing layer 40 and the bottom 50 for receiving a gas generated in the receiving volume.

[0140] The underbody 50 has an outlet opening 51 for discharging the gas generated in the receiving volume 4 and absorbed in the cavity 60 to the environment.

[0141] Figure 3 shows a sectional view of a battery 1 in the region of a receiving device 20 according to a further embodiment. A battery component 3 inserted in the receiving device 20 is materially connected to the receiving surface 22 of the receiving device 20. In addition, the battery component 3 is materially connected to an inner wall 211 of the receiving elevation 21 of the receiving device 20.

[0142] The sealing layer 40 of the battery housing component 10 has reinforcing ribs 41 which extend from the sealing layer 40 into a free cross-sectional area 31 of the through opening 30.

[0143] The battery component 3 is inserted into the receiving device 20 in such a way that a free space 6 is formed between a bottom surface 5 of the battery component 3 and the sealing layer 40. Cooling fluid for immersion cooling, in particular two-phase immersion cooling, can be accommodated in this free space 6. The battery housing component 10 has a support rib 70 which is arranged between the sealing layer 40 and the underbody 50. The support rib 70 extends from the sealing layer 40 in the direction of an underbody inner surface 52 of the underbody 50 facing the sealing layer 40 and is materially connected to the sealing layer 40. The support rib 70 is in direct contact with the underbody inner surface 52 of the underbody 50. The support rib 70 is enclosed by the through opening 30 in a plan view of the bottom 11 of the battery housing component 10.In other words, the support rib 70 is surrounded by the through-opening 30 in a plan view of the base 11 of the battery housing component 10. The support rib 70 is designed as a hollow cylinder.

[0144] List of reference symbols

[0145] 1 battery

[0146] 2 battery cases

[0147] 3 Battery component

[0148] 4 Recording volume

[0149] 5 Bottom surface (of the battery component)

[0150] 6 Clearance (between the bottom surface of the battery component and the sealing layer)

[0151] 7 Battery housing cover

[0152] 10 Battery housing component

[0153] 11 Bottom (of the battery housing component)

[0154] 111 Connecting surface (of the floor)

[0155] 112 Inner surface (of the floor)

[0156] 20 Recording facility

[0157] 21 Admission survey (of the reception facility)

[0158] 211 inner wall (of the recording elevation)

[0159] 22 Recording area (of the recording device)

[0160] 30 passage openings

[0161] 31 Free cross-section (of the through opening)

[0162] 40 sealing layer

[0163] 41 Reinforcing rib (of the sealing layer)

[0164] 50 Underbody

[0165] 51 Outlet opening

[0166] 52 Underbody interior surface

[0167] 60 cavity

[0168] 70 support rib

Claims

Patent claims 1. Battery housing component (10) for a battery housing (2), comprising a plurality of receiving devices (20) for receiving a plurality of battery components (3); and a number of through-openings (30) corresponding to the plurality of receiving devices (20), which are formed in a base (11) of the battery housing component (10), wherein in a plan view of the base (11) of the battery housing component (10) a through-opening (30) is at least partially enclosed by a respective receiving device (20), wherein the battery housing component (10) is characterized by the following feature: the battery housing component (10) has a sealing layer (40) for sealing the through-openings (30), wherein the sealing layer (40) is materially bonded to the base (11) of the battery housing component (10).

2. Battery housing component (10) according to claim 1, characterized in that the sealing layer (40) comprises a material with a melt flow index of greater than or equal to 35 g / 10 min.

3. Battery housing component (10) according to claim 1 or 2, characterized by the following features: the battery housing component (10) at least partially delimits a receiving volume (4) for receiving the plurality of battery components (3); and the sealing layer (40) is materially connected to a connecting surface (111) of the base (11) of the battery housing component (10) facing away from the receiving volume ().

4. Battery housing component (10) according to one of the preceding claims, characterized in that the sealing layer (40) is connected to the bottom (11) of the battery housing component (10) in such a way that the through openings (30) are completely closed by the sealing layer (40).

5. Battery housing component (10) according to one of the preceding claims, characterized in that the sealing layer (40) has at least one reinforcing rib (41) which extends from the sealing layer (40) into a free cross-sectional area (31) of a through opening (30).

6. Battery housing component (10) according to one of the preceding claims, characterized in that at least one receiving device (20) has at least one receiving elevation (21) which extends from an inner surface (112) of the base (11) of the battery housing component (10) into a receiving volume (4) which is at least partially delimited by the battery housing component (10).

7. Battery housing component (10) according to one of the preceding claims, characterized by the following features: the battery housing component (10) has a bottom (50) which is at least indirectly connected to the base (11) of the battery housing component (10); and a cavity (60) for receiving a gas generated in the receiving volume (4) is formed between the sealing layer (40) and the underbody (50).

8. Battery housing component (10) according to claim 7, characterized in that the underbody (50) is materially bonded at least is indirectly connected to the bottom (11) of the battery housing component (10).

9. Battery housing component (10) according to claim 7 or 8, characterized in that the underbody (50) has at least one outlet opening (51) for discharging the gas generated in the receiving volume (4) and / or absorbed in the cavity (60).

10. Battery housing component (10) according to one of claims 7 to 9, characterized in that the battery housing component (10) has at least one support rib (70) which is arranged between the sealing layer (40) and the underbody (50).

11. A battery housing (2) for accommodating a plurality of battery components (3), comprising: a battery housing component (10) according to one of the preceding claims; and a battery housing cover (7) connected to the battery housing component (10) such that a receiving volume (4) for accommodating the plurality of battery components (3) is formed.

12. Battery (1), comprising: a battery housing (2) according to claim 11; and a plurality of battery components (3), wherein in each case a battery component (3) is inserted into a respective receiving device (20) of the battery housing component (10).

13. Battery (1) according to claim 12, characterized in that at least one battery component (3) is materially connected to a receiving surface (22) of the receiving device (21) in which the battery component (3) is inserted.

14. Battery (1) according to claim 13, characterized in that the battery component (3) is integrally connected to the receiving surface (22) by means of an adhesive, wherein the adhesive has a heat resistance up to a temperature of 600 °C.

15. Motor vehicle comprising a battery (1) according to one of claims 12 to 14.

16. Injection molding method for producing a battery housing component (10) according to one of claims 1 to 10 by means of an injection molding tool, wherein the injection molding tool has a first tool half and a second tool half, and wherein the injection molding method comprises the following method steps: Injecting a fiber-reinforced plastic into the injection mold in the closed position; moving the first mold half of the injection mold so that a free space is formed between the first mold half and the fiber-reinforced plastic in the second mold half; and Injecting a fiber-free plastic into the injection mold so that the fiber-reinforced plastic in the second mold half is overmolded by the fiber-free plastic.

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