Battery housing component for a battery housing, battery housing for receiving a large number of battery components, and battery having a battery housing
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- KAUTEX TEXTRON GMBH & CO KG
- Filing Date
- 2024-06-28
- Publication Date
- 2026-05-06
AI Technical Summary
Battery housings in existing technologies face challenges in controlling the release of gas produced during irreversible chemical decomposition of battery components, leading to uncontrolled pressure buildup and potential bursting, which can result in gas escape from the housing.
A battery housing component with recesses in its bottom that absorb and guide gas out in a controlled manner, allowing for immersion cooling and reducing pressure and temperature, while being produced from fiber-reinforced plastics using an extrusion process for improved accuracy and stability.
The solution effectively prevents uncontrolled gas escape and reduces pressure and temperature within the battery housing, enabling safe operation and efficient cooling during both normal and decomposed states of the battery components.
Smart Images
Figure EP2024068274_02012025_PF_FP_ABST
Abstract
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 recesses which corresponds to the plurality of receiving devices and are formed in a base of the battery housing component. In a plan view of the base of the battery housing component, a recess is at least partially enclosed by a respective receiving device. The recesses each have a recess base and at least one side wall, wherein the side walls are each materially connected to the base of the battery housing component and to the associated recess bases, and wherein the side walls each have an extension component which runs orthogonal to a surface spanned by the base.
[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).
[0008] 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 escaping from a battery component during the chemical decomposition of the battery components is initially absorbed in a depression until the escaping gas breaks through the depression in the region of the side wall and / or in the region of the depression base due to the prevailing pressure and temperature conditions. As a result, a gas located in the receiving volume is guided out of the receiving volume in an improved, controlled manner.Furthermore, the pressure within the receiving volume is reduced and the temperature is lowered simultaneously. In the battery's normal operating mode, i.e., during operation without irreversible chemical decomposition, immersion cooling, particularly two-phase immersion cooling, can be easily operated in the receiving volume of the battery housing component.
[0009] A further advantage of the battery housing component according to the invention is that it can be produced by means of an extrusion process from, for example, fiber-reinforced plastics, wherein the thickness of the material walls forming the recesses can be reproduced with improved accuracy. The battery housing component at least partially defines a receiving volume for accommodating the plurality of battery components.
[0010] The recesses are designed to accommodate a gas generated in the receiving volume. In other words, a gas generated in the receiving volume can be accommodated, at least temporarily, in the recessed volumes delimited by the recesses.
[0011] The receiving volume at least partially delimited by the battery housing component is fluidly connected to the recess volumes delimited by the recesses.
[0012] The recesses each form a free cross-sectional area on an inner surface of the bottom of the battery housing component facing the receiving volume of the battery housing component.
[0013] The free cross-sectional area is preferably circular.
[0014] A recess which is enclosed by a receiving device in a plan view of the bottom of the battery housing component is bordered by the receiving device. In other words, a free cross-sectional area of the recess is smaller than a receiving area which is at least partially delimited by the receiving device in a plan view of the bottom of the battery housing component. Furthermore, the free cross-sectional area of the recess in a plan view of the bottom of the battery housing component lies completely within the receiving area partially delimited by the receiving device.
[0015] 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.
[0016] The side walls of the recesses each extend away from the bottom of the battery housing component, preferably orthogonally away from the bottom of the battery housing component.
[0017] A battery housing component designed in this way has the advantage that the battery housing component can be produced by means of an extrusion process from, for example, fiber-reinforced plastics, wherein the thickness of the side walls forming the recesses can be reproduced with improved accuracy. Because the side walls extend orthogonally away from the bottom of the battery housing component, the thickness of the side walls is set orthogonally to the parting plane of the extrusion tool and can thus be produced reproducibly with improved accuracy.
[0018] 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.
[0019] Preferably, the battery housing component is designed to accommodate 500 or more battery cells, in particular 700 or more battery cells.
[0020] Preferably, the battery housing component, and more 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. A battery housing component formed in this way has the advantage that the battery housing component is easier to manufacture.
[0021] Preferably, the battery housing component is designed as an extruded component.
[0022] 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.
[0023] More preferably, the battery housing component, and even more preferably the base of the battery housing component, comprises fibers. The fibers can be in the form of glass fibers and / or carbon fibers and / or aramid fibers. The battery housing component preferably comprises a polyamide 6 with a 30-55% glass fiber content and / or a polypropylene with a 30-55% glass fiber content. 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. The battery housing component particularly preferably comprises a polyamide 6 with a 40-50% glass fiber content and / or a polypropylene with a 40-50% glass fiber content. The fibers can preferably be in the form of long fibers. When reference is made to a glass fiber content in the context of this invention, a weight proportion of glass fibers is meant.
[0024] A battery housing component designed in this way has the advantage that the battery housing component has improved stability, in particular improved mechanical rigidity. Preferably, the battery housing component is designed such that the side walls of the recesses are each monolithically connected to the bottom of the battery housing component and to the associated recess bottoms.
[0025] A battery housing component designed in this way has the advantage that the battery housing component has improved rigidity and can be manufactured in a single manufacturing step.
[0026] Preferably, the recess base has a thickness extension that is less than or equal to the thickness extension of the base of the battery housing component.
[0027] A battery housing component designed in this way has the advantage that, when used as intended, the battery housing component 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 recess base of a recess with a smaller thickness than the base of the battery housing component is penetrated in a simplified manner by a gas jet emerging from a battery component, so that a gas located in the receiving volume can be discharged from the receiving volume in a simplified, controlled manner.
[0028] The thickness extension can also be referred to as material thickness or as material thickness or as wall thickness or as wall thickness.
[0029] Preferably, the side wall of at least one recess has, at least in sections, a thickness extension which is less than or equal to the thickness extension of the bottom of the battery housing component and / or less than or equal to the thickness extension of the bottom of the recess.
[0030] 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 side wall of a recess with a smaller thickness than the bottom of the recess and / or than the bottom of the battery housing component is penetrated in a simplified manner by a gas jet emerging from a battery component, so that a gas located in the receiving volume can be guided out of the receiving volume in a simplified, controlled manner. Furthermore, at the same time the pressure within the receiving volume is reduced in an improved manner and the temperature is reduced in an improved manner.
[0031] Preferably, the side wall of at least one recess has a thickness of less than or equal to 1 mm, preferably less than or equal to 0.5 mm and particularly preferably less than or equal to 0.3 mm.
[0032] A battery housing component designed in this way has the advantage that, when used as intended, the battery housing component 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 side wall of a recess with such a small thickness is penetrated in a particularly simple manner by a gas jet emerging from a battery component. Preferably, the recess base of at least one recess runs at least partially parallel to the base of the battery housing component.
[0033] 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. Because the depression base of a depression runs at least partially parallel to the base of the battery housing component, a notch effect in the connecting region between the depression base and the side wall of a depression is increased, so that a predetermined breaking point is formed in the connecting region between the depression base and the side wall. As a result, a gas jet escaping from a battery component can break through the depression particularly easily, in particular in the connecting region between the side wall and the depression base of a depression.
[0034] Preferably, the side walls of the recesses are each materially connected to the bottom of the battery housing component and to the associated recess bottoms.
[0035] Preferably, the side walls each extend from a rear side of the base of the battery housing component facing away from the receiving volume. Further preferably, the side walls each extend to an upper side of the associated recess base facing the receiving volume of the battery housing component.
[0036] Preferably, the side wall and the base of a recess form an angle of less than or equal to 90°. A battery housing component designed in this way has the advantage that, when used as intended, the battery housing component provides 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.Because the side wall and the base of a depression form an angle of less than or equal to 90° with one another, the notch effect in the connecting region between the base of the depression and the side wall of a depression is further increased, so that a gas jet emerging from a battery component can break through the depression, particularly in the connecting region between a side wall and the base of a depression, in a particularly simple manner.
[0037] Preferably, the side wall and the depression bottom of a depression form an angle of less than or equal to 45° and preferably an angle of less than or equal to 30° with each other.
[0038] The notch effect in the connection area between the depression bottom and a side wall of a depression is increased by a smaller included angle.
[0039] Preferably, the battery housing component is designed such that the battery housing component at least partially delimits a receiving volume for receiving the plurality of battery components, wherein the recess base of at least one recess is curved in the direction of the receiving volume of the battery housing component.
[0040] 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. By curving the recess base in the direction of the receiving volume, the notch effect in the connecting region of a side wall and the recess base of a recess is increased even further, so that an even better predetermined breaking point is formed. As a result, a gas jet escaping from a battery component can break through the recess even better in the connecting region between a side wall and the recess base of a recess.
[0041] The feature according to which the depression bottom of at least one depression is curved in the direction of the receiving volume can also be expressed in such a way that the depression bottom of at least one depression is convex in the direction of the receiving volume.
[0042] Preferably, the battery housing component is designed such that the battery housing component at least partially delimits a receiving volume for receiving the plurality of battery components, wherein the recess base of at least one recess has a support elevation which extends from an inner surface of the recess base in the direction of the receiving volume of the battery housing component.
[0043] A battery housing component designed in this way has the advantage that, when the battery housing component is used as intended, the recess base has increased resistance to a compressive load acting on the outer surface of the recess base facing away from the receiving volume. When such a compressive load acts on the outer surface of the recess base, the recess base is supported by the support elevation on a battery component inserted in the receiving device. This can prevent uncontrolled and unwanted destruction of the recess base by a compressive load acting on the outer surface of the recess base facing away from the receiving volume. At the same time, a gas jet escaping from a battery component can still penetrate the recess in the connecting area between a side wall and the recess base.
[0044] The support elevation can extend in the direction of the receiving volume of the battery housing component such that the end face has a normal distance to the receiving surface. The normal distance can be less than or equal to 5 mm, less than or equal to 3 mm or less than or equal to 1 mm. In a preferred embodiment, the normal distance between the end face of the support elevation and the receiving surface is in a range of greater than or equal to 1 mm and less than or equal to 5 mm. The normal distance can be dimensioned starting from the end face of the support elevation in the direction of the receiving volume to the receiving surface. In other words, the end face of the support elevation can be arranged below the receiving surface in a cross-sectional view of the battery housing component.
[0045] When a battery housing component designed in this way is used as intended, there is a gap between the base surface of a battery component inserted into the receiving device and the end surface of the support elevation, wherein the gap is smaller than the distance between the inner surface of the recess base and the base surface of the battery component inserted into the receiving device. This can prevent uncontrolled and unwanted destruction of the recess base due to a pressure load acting on the outer surface of the recess base facing away from the receiving volume. At the same time, a gas jet escaping from a battery component can still penetrate the recess in the connection area between a side wall and the recess base.
[0046] The support elevation can extend to a plane in which the receiving surface lies. In other words, the support elevation can extend in the direction of the receiving volume of the battery housing component such that the end face of the support elevation lies in the plane in which the receiving surface lies.
[0047] A battery housing component designed in this way has the advantage that, when used as intended, the recess base has an even greater resistance to compressive loads acting on the outer surface of the recess base facing away from the receiving volume. When used as intended, a battery housing component designed in this way makes contact with the end face of the support elevation.
[0048] The support elevation may have an extension component that extends orthogonally from the inner surface of a recess bottom toward the receiving volume of the battery housing component. The support elevation may extend orthogonally from the inner surface of a recess bottom toward the receiving volume of the battery housing component.
[0049] The support elevation can be monolithically connected to the depression base. Two monolithically connected components are made from a single piece. In particular, two monolithically connected components are connected seamlessly. The support elevation can have the same thickness as the depression base. Alternatively, the support elevation can have a thickness that is smaller or larger than the thickness of the depression base.
[0050] Preferably, the recess base of at least one recess has at least two support elevations, each extending from an inner surface of the recess base in the direction of the receiving volume of the battery housing component. The support elevations can be arranged at a distance from one another. The distance between the support elevations can correspond to the distance between a support elevation and a side wall of the recess.
[0051] Preferably, the battery housing component is designed such that the support elevation is designed as a rib or as a bead.
[0052] 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.
[0053] 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 almost exclusively breaks through the depressions in the base of the battery housing component and is guided out of the receiving volume.
[0054] 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.
[0055] 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.
[0056] 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.
[0057] 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.
[0058] At least one receiving protrusion, preferably exactly one receiving protrusion, is preferably arranged adjacent to four recesses in the base of the battery housing component on the inner surface of the base 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.
[0059] 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 part of more than one receiving device, the number of required receiving protrusions can be reduced while maintaining the same number of receiving devices.
[0060] The receiving area delimited by the receiving elevation is preferably greater than or equal to a cross-sectional area of a battery component.
[0061] 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.
[0062] 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.
[0063] 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.
[0064] The receiving protrusion is preferably formed as a one-piece, circular rib. Consequently, the receiving protrusion is hollow and cylindrical. A battery housing component formed in this way has the advantage that the battery housing component is easier to manufacture and, at the same time, that cylindrical battery cells can be used even more effectively in the battery housing component.
[0065] Preferably, the receiving devices each have three, preferably four, receiving elevations.
[0066] 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.
[0067] 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 a rear side of the bottom and the bottom.
[0068] 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 depressions in the base of the battery housing component and be absorbed in the cavity between a rear side of the base of the battery housing component and the underbody. This prevents excess pressure in the receiving volume and uncontrolled gas escape from the receiving volume.
[0069] The underbody is preferably indirectly connected to the bottom of the battery housing component via a side wall of the battery housing component.
[0070] The underbody preferably comprises or is formed from the same material as the battery housing component.
[0071] A battery housing component designed in this way has the advantage that the battery housing component can be manufactured more easily.
[0072] The subfloor preferably has a connecting area.
[0073] 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.
[0074] 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.
[0075] Preferably, the underbody is at least indirectly connected to the bottom of the battery housing component by means of welding and / or adhesive.
[0076] The subfloor is preferably connected to the back of the floor in the connection area of the subfloor, preferably materially connected to the back of the floor.
[0077] 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 materially bonded to the back of the base in the connection area, the cavity formed between the back of the base and the underbody has even better fluid tightness.
[0078] 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.
[0079] A battery housing component designed in this way has the advantage that, when used as intended, the battery housing component provides even better protection against uncontrolled gas leakage during an irreversible chemical decomposition process. The cavity formed between the rear of the base 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.
[0080] The underbody is preferably designed as underbody protection.
[0081] A battery housing component designed in this way has the advantage that the battery housing component has improved stability, in particular improved mechanical rigidity. Preferably, the battery housing component is 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.
[0082] When the battery housing component is designed accordingly, gas which has penetrated the recesses in the base of the battery housing component is released into the environment via the cavity and via at least one outlet opening when used as intended.
[0083] 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.
[0084] 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.
[0085] 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.
[0086] 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 escaping from a battery component during the chemical decomposition of the battery components is initially absorbed in the recess volume of a recess until the escaping gas breaks through the recess in the region of the side wall and / or in the region of the recess base due to the existing pressure and temperature conditions. As a result, a gas located in the receiving volume is guided out of the receiving volume in an improved, controlled manner.Furthermore, the pressure within the receiving volume is reduced and the temperature is lowered simultaneously. In the battery's normal operating mode, i.e., during operation without irreversible chemical decomposition, immersion cooling, particularly two-phase immersion cooling, can be easily implemented in the receiving volume of the battery housing component.
[0087] 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.
[0088] A battery housing designed in this way has the advantage that the battery housing has an enlarged storage volume.
[0089] The battery housing cover can be designed as another battery housing component described above.
[0090] The battery housing cover can be designed as a substantially flat component. The battery housing cover preferably comprises the same material as the battery housing component or is formed from it.
[0091] The battery housing cover is preferably designed as an extruded component.
[0092] The battery housing cover is preferably materially connected to the battery housing component.
[0093] A battery housing designed in this way has the advantage of offering even better protection against uncontrolled gas leakage from the battery housing's receiving volume. Due to the integral connection between the battery housing component and the battery housing cover, the receiving volume exhibits improved fluid tightness.
[0094] The present invention is also based on the object of providing a battery which enables a controlled release of gas produced from a battery housing and at the same time enables immersion cooling, in particular a two-phase immersion cooling.
[0095] 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.
[0096] 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 escaping from a battery component during the chemical decomposition of the battery components is initially absorbed in the depression volume of a depression until the escaping gas breaks through the depression in the region of the side wall and / or in the region of the depression base due to the existing pressure and temperature conditions. As a result, a gas located in the absorption volume is guided out of the absorption volume in an improved, controlled manner. Furthermore, the pressure within the absorption volume is reduced and the temperature is lowered at the same time.In the normal operating mode of the battery, that is, during operation without irreversible chemical decomposition process, immersion cooling, in particular two-phase immersion cooling, can be easily realized in the receiving volume of the battery housing component.
[0097] 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 depression enclosed by the receiving device. Because the free cross-sectional area of the depression 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 depression is completely covered by the base surface of the battery component. As a result, the depression volume partially delimited by the depression remains free, so that cooling fluid, in particular for two-phase immersion cooling, can be accommodated in the depression volume.
[0098] 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.
[0099] The receiving surface is preferably materially connected to the bottom surface of the battery component.
[0100] The battery component is preferably additionally materially connected to an inner wall of at least one receiving elevation.
[0101] 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-fit 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 breaks through the depression and exits the receiving volume through the perforated depression.
[0102] Preferably, at least one battery component is connected in a fluid-tight manner, in particular in a material-tight manner, to a receiving surface of the receiving device in which the battery component is inserted. Further preferably, the at least one battery component is additionally connected in a fluid-tight manner, in particular in a material-tight manner, to an inner wall of at least one receiving elevation.
[0103] 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 and at the same time enables immersion cooling of the battery components. The at least one battery component is inserted in the receiving device in an even better way thanks to the fluid-tight connection to the receiving surface of the receiving device and to 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 breaks through the depression and exits the receiving volume through the perforated depression without entering the receiving volume. At the same time, it is possible for cooling fluid for immersion cooling to be held in the receiving volume without cooling fluid entering the receiving depressions.
[0104] Further preferably, the battery components are designed in such a way that in the event of an irreversible chemical decomposition process of a battery component, a gas jet emerges only from a region of a bottom surface of the battery component.
[0105] As a result, a gas jet emerging from the battery component can penetrate the receiving device in which the battery component is arranged in an even better manner in the region of the recess without gas emerging from the battery component entering the receiving volume of the battery housing component.
[0106] Preferably, the battery is designed such that the battery component is firmly connected to the receiving surface by means of a heat-resistant adhesive.
[0107] A heat-resistant adhesive maintains its bonding strength up to a certain temperature limit. In particular, a heat-resistant adhesive does not begin to decompose, so its fixing effect remains intact even at temperatures up to the temperature limit. Preferably, the battery component is bonded to the receiving surface using an adhesive that is heat-resistant up to a temperature limit of 600 °C.
[0108] The adhesive is preferably a silicone adhesive.
[0109] 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.
[0110] 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.
[0111] 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
[0112] Battery components of the battery enable .
[0113] This object underlying the present invention is achieved by a motor vehicle having a battery as described above.
[0114] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:
[0115] Figure 1: a plan view of a battery housing component according to the invention according to a first embodiment; Figure 2: a sectional view of a battery housing component according to the invention
[0116] Battery having a battery housing according to the invention with a battery housing component according to the invention shown in Figure 1;
[0117] Figure 3: a sectional view of a battery in the region of a receiving device according to a second embodiment;
[0118] Figure 4: a sectional view of a battery in the region of a receiving device according to a third embodiment;
[0119] Figure 5: a sectional view of a battery in the region of a receiving device according to a fourth embodiment; and
[0120] Figure 6: a sectional view of a battery in the region of a receiving device according to a fifth embodiment.
[0121] 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.
[0122] Figure 1 shows a battery housing component 10 according to a first embodiment 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 not shown in Figure 1. Furthermore, the battery housing component 10 has a number of recesses 30 corresponding to the plurality of receiving devices 20, which recesses 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, one recess 30 is each bordered by one receiving device 20. In other words, one recess 30 is each bordered by one receiving device 20.The recesses 30 each form a circular free cross-sectional area 33 on the inner surface 112 of the base 11 of the battery housing component 10.
[0123] As can be clearly seen in particular in Figures 2 to 4, 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 which is 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, the receiving surface 22 being circular. The receiving elevation 21 and the receiving surface 22 as well as the recess 30 are arranged concentrically to one another.
[0124] 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 first embodiment 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.
[0125] The battery housing 2 has a battery housing cover 6 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.
[0126] The battery housing component 10 has a number of recesses 30 corresponding to the plurality of receiving devices 20, which recesses are formed in the base 11 of the battery housing component 10. The recesses 30 each have a recess base 31 and a circumferential side wall 32. The side walls 32 of the recesses 30 are each materially connected to the base 11 of the battery housing component 10 and to the associated recess bases 31. The side walls 32 each extend orthogonally away from a rear side 111 of the base 11 of the battery housing component 10 facing away from the receiving volume 4.
[0127] The recess bottoms 31 of the recesses 30 each run parallel to the bottom 11 of the battery housing component 10. The side walls 32 and the associated recess bottoms 31 of the recesses 30 each form an angle of 90° with one another. The side walls 32 each extend to an upper side of the associated recess bottom 31 facing the receiving volume 4 of the battery housing component 10.
[0128] The battery housing component 10 has a base 40 which is directly connected to the base 11 of the battery housing component 10, wherein a cavity 50 for receiving a gas generated in the receiving volume 4 is formed between the rear side 111 of the base 11 of the battery housing component 10 and the base 40. The base 40 has an outlet opening 41 for discharging the gas generated in the receiving volume 4 and received in the cavity 50 to the environment.
[0129] Figure 3 shows a sectional view of a battery 1 in the region of a receiving device 20 according to a second embodiment. A battery component 3 inserted in the receiving device 20 is connected by a region of its bottom surface 5 in a materially bonded, fluid-tight manner to the receiving surface 22 of the receiving device 20. In addition, the battery component 3 is connected in a materially bonded, fluid-tight manner to an inner wall 211 of the receiving elevation 21 of the receiving device 20.
[0130] The side wall 32 of the recess 30 is monolithically connected to the recess base 31 of the recess 30 and to the base 11 of the battery housing component 10. The recess base 31 has a thickness that is smaller than the thickness of the base 11 of the battery housing component 10. The side wall 32 has a thickness that is smaller than the thickness of the base 11 of the battery housing component 10 and smaller than the thickness of the recess base 31 of the recess 30. The side wall 32 and the recess base 31 form an angle of 90° with one another and at least partially delimit a recess volume 34.
[0131] The battery component 3 is inserted into the receiving device 20 in such a way that the recess volume 34 of the recess 30 remains free, so that a cooling fluid for immersion cooling, in particular a two-phase immersion cooling, can be accommodated in the recess volume 34.
[0132] Figure 4 shows a sectional view of a battery 1 in the region of a receiving device 20 according to a third embodiment. The recess base 31 of the recess 30 is curved in the direction of the receiving volume 4 of the battery housing component 3. The side wall 32 and the recess base 31 each have a thickness that is smaller than the thickness of the base 11 of the battery housing component 10. The side wall 32 has a smaller thickness than the recess base 31.
[0133] Figure 5 shows a sectional view of a battery 1 in the region of a receiving device 20 according to a fourth embodiment. The recess base 31 of the recess 30 has two support elevations 35 designed as ribs 36, each extending from an inner surface 311 of the recess base 31 in the direction of the receiving volume 4 of the battery housing component 10.
[0134] The ribs 36 each extend in the direction of the
[0135] Receiving volume 4 of the battery housing component 10, such that each end face 351 of the ribs 36 has a normal distance to the receiving surface 22. In the sectional view of Figure 5, the end faces 351 are arranged below the receiving surface 22, so that a gap is formed between the bottom surface 5 of the battery component 3 and the end faces 351.
[0136] The ribs 36 extend orthogonally from the inner surface 311 of the recess base 31 in the direction of the receiving volume 4 of the battery housing component 10. The ribs 36 are monolithically connected to the recess base 31. The ribs 36 are arranged spaced apart from one another, wherein the distance between the ribs 36 corresponds to the distance of one of the ribs 36 from a side wall 32 of the recess 30.
[0137] Figure 6 shows a sectional view of a battery 1 in the region of a receiving device 20 according to a fifth embodiment. The recess base 31 of the recess 30 has two support elevations 35 designed as beads 37, each extending from an inner surface 311 of the recess base 31 in the direction of the receiving volume 4 of the battery housing component 10.
[0138] The beads 37 extend in the direction of the receiving volume 4 in such a way that the end faces 351 each lie in the plane in which the receiving surface 22 lies, so that the end faces 351 are in contact with the bottom surface 5 of the battery component 3.
[0139] List of reference symbols
[0140] 1 battery
[0141] 2 battery cases
[0142] 3 Battery component
[0143] 4 Recording volume
[0144] 5 Bottom surface (of the battery component)
[0145] 6 Battery case cover
[0146] 10 Battery housing component
[0147] 11 Bottom (of the battery housing component)
[0148] 111 Back (of the floor)
[0149] 112 Inner surface (of the floor)
[0150] 20 Recording device
[0151] 21 Admission survey (of the reception facility)
[0152] 211 inner wall (of the recording elevation)
[0153] 22 Recording area (of the recording device)
[0154] 30 Deepening
[0155] 31 recessed floor
[0156] 311 Inner surface (of the recess bottom)
[0157] 32 Side wall (of the recess)
[0158] 33 Free cross-sectional area (of the recess)
[0159] 34 deepening volumes
[0160] 35 Support elevation
[0161] 351 Front face (of the support elevation)
[0162] 36 rib
[0163] 37 bead
[0164] 40 Underbody
[0165] 41 Outlet opening
[0166] 50 cavity
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 recesses (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), each recess (30) is at least partially enclosed by a respective receiving device (20), wherein the recesses (30) each have a recess base (31) and at least one side wall (32), wherein the side walls (32) are each materially connected to the base (11) of the battery housing component (10) and to the associated recess bases (31), and wherein the side walls (32) each have an extension component which runs orthogonally to a surface spanned by the base (11).
2. Battery housing component (10) according to claim 1, characterized in that the recess base (31) of at least one recess (30) has, at least in sections, a thickness extension which is less than or equal to the thickness extension of the base (11) of the battery housing component (10).
3. Battery housing component (10) according to claim 1 or 2, characterized in that the side wall (32) of at least one recess (30) has, at least in sections, a thickness extension which is less than or equal to the thickness extension of the bottom dens (11) of the battery housing component (10) and / or is less than or equal to the thickness extension of the recess base (31) of the recess (30).
4. Battery housing component (10) according to one of the preceding claims, characterized in that the side wall (32) of at least one recess (30) has a thickness extension of less than or equal to 1 mm, preferably of less than or equal to 0.5 mm and particularly preferably of less than or equal to 0.3 mm.
5. Battery housing component (10) according to one of the preceding claims, characterized in that the recess bottom (31) of at least one recess (30) runs at least partially parallel to the bottom (11) of the battery housing component (10).
6. Battery housing component (10) according to one of the preceding claims, characterized in that the side wall (32) and the recess bottom (31) of a recess (30) enclose an angle of less than or equal to 90° with one another.
7. Battery housing component (10) according to one of the preceding claims, 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 recess base (31) of at least one recess (30) is curved in the direction of the receiving volume (4) of the battery housing component (10).
8. Battery housing component (10) according to one of the preceding claims, 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 recess base (31) of at least one recess (30) has a support elevation (35) which extends from an inner surface (311) of the recess base (31) in the direction of the receiving volume (4) of the battery housing component (10).
9. Battery housing component (10) according to claim 8, characterized in that the support elevation (35) is designed as a rib (36) or as a bead (37).
10. 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).
11. Battery housing component (10) according to one of the preceding claims, characterized by the following features: the battery housing component (10) has a bottom (40) which is at least indirectly connected to the base (11) of the battery housing component (10); and a cavity (50) for receiving a gas generated in the receiving volume (4) is formed between a rear side (111) of the base (11) of the battery housing component (10) and the underbody (40).
12. Battery housing component (10) according to claim 11, characterized in that the underbody (40) has at least one outlet opening (41) for discharging the gas generated in the receiving volume (4) and / or absorbed in the cavity (50).
13. 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 (6) connected to the battery housing component (10) such that a receiving volume (4) for accommodating the plurality of battery components (3) is formed.
14. A battery (1), comprising: a battery housing (2) according to claim 13; and a plurality of battery components (3), wherein each battery component (3) is inserted into a respective receiving device (20) of the battery housing component (10).
15. Battery (1) according to claim 14, 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.
16. Battery (1) according to claim 15, characterized in that the battery component (3) is materially connected to the receiving surface (22) by means of a heat-resistant adhesive.
17. Motor vehicle comprising a battery (1) according to one of claims 14 to 16.